| /* |
| * Copyright (C) 2008 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #include "debugger.h" |
| |
| #include <sys/uio.h> |
| |
| #include <set> |
| |
| #include "android-base/stringprintf.h" |
| |
| #include "arch/context.h" |
| #include "art_field-inl.h" |
| #include "art_method-inl.h" |
| #include "base/enums.h" |
| #include "base/time_utils.h" |
| #include "class_linker.h" |
| #include "class_linker-inl.h" |
| #include "dex_file-inl.h" |
| #include "dex_file_annotations.h" |
| #include "dex_instruction.h" |
| #include "entrypoints/runtime_asm_entrypoints.h" |
| #include "gc/accounting/card_table-inl.h" |
| #include "gc/allocation_record.h" |
| #include "gc/scoped_gc_critical_section.h" |
| #include "gc/space/large_object_space.h" |
| #include "gc/space/space-inl.h" |
| #include "handle_scope.h" |
| #include "jdwp/jdwp_priv.h" |
| #include "jdwp/object_registry.h" |
| #include "jni_internal.h" |
| #include "jvalue-inl.h" |
| #include "mirror/class.h" |
| #include "mirror/class-inl.h" |
| #include "mirror/class_loader.h" |
| #include "mirror/object-inl.h" |
| #include "mirror/object_array-inl.h" |
| #include "mirror/string-inl.h" |
| #include "mirror/throwable.h" |
| #include "obj_ptr-inl.h" |
| #include "reflection.h" |
| #include "safe_map.h" |
| #include "scoped_thread_state_change-inl.h" |
| #include "ScopedLocalRef.h" |
| #include "ScopedPrimitiveArray.h" |
| #include "handle_scope-inl.h" |
| #include "thread_list.h" |
| #include "utf.h" |
| #include "well_known_classes.h" |
| |
| namespace art { |
| |
| using android::base::StringPrintf; |
| |
| // The key identifying the debugger to update instrumentation. |
| static constexpr const char* kDbgInstrumentationKey = "Debugger"; |
| |
| // Limit alloc_record_count to the 2BE value (64k-1) that is the limit of the current protocol. |
| static uint16_t CappedAllocRecordCount(size_t alloc_record_count) { |
| const size_t cap = 0xffff; |
| if (alloc_record_count > cap) { |
| return cap; |
| } |
| return alloc_record_count; |
| } |
| |
| // Takes a method and returns a 'canonical' one if the method is default (and therefore potentially |
| // copied from some other class). This ensures that the debugger does not get confused as to which |
| // method we are in. |
| static ArtMethod* GetCanonicalMethod(ArtMethod* m) |
| REQUIRES_SHARED(Locks::mutator_lock_) { |
| if (LIKELY(!m->IsDefault())) { |
| return m; |
| } else { |
| mirror::Class* declaring_class = m->GetDeclaringClass(); |
| return declaring_class->FindDeclaredVirtualMethod(declaring_class->GetDexCache(), |
| m->GetDexMethodIndex(), |
| kRuntimePointerSize); |
| } |
| } |
| |
| class Breakpoint : public ValueObject { |
| public: |
| Breakpoint(ArtMethod* method, uint32_t dex_pc, DeoptimizationRequest::Kind deoptimization_kind) |
| : method_(GetCanonicalMethod(method)), |
| dex_pc_(dex_pc), |
| deoptimization_kind_(deoptimization_kind) { |
| CHECK(deoptimization_kind_ == DeoptimizationRequest::kNothing || |
| deoptimization_kind_ == DeoptimizationRequest::kSelectiveDeoptimization || |
| deoptimization_kind_ == DeoptimizationRequest::kFullDeoptimization); |
| } |
| |
| Breakpoint(const Breakpoint& other) REQUIRES_SHARED(Locks::mutator_lock_) |
| : method_(other.method_), |
| dex_pc_(other.dex_pc_), |
| deoptimization_kind_(other.deoptimization_kind_) {} |
| |
| // Method() is called from root visiting, do not use ScopedObjectAccess here or it can cause |
| // GC to deadlock if another thread tries to call SuspendAll while the GC is in a runnable state. |
| ArtMethod* Method() const { |
| return method_; |
| } |
| |
| uint32_t DexPc() const { |
| return dex_pc_; |
| } |
| |
| DeoptimizationRequest::Kind GetDeoptimizationKind() const { |
| return deoptimization_kind_; |
| } |
| |
| // Returns true if the method of this breakpoint and the passed in method should be considered the |
| // same. That is, they are either the same method or they are copied from the same method. |
| bool IsInMethod(ArtMethod* m) const REQUIRES_SHARED(Locks::mutator_lock_) { |
| return method_ == GetCanonicalMethod(m); |
| } |
| |
| private: |
| // The location of this breakpoint. |
| ArtMethod* method_; |
| uint32_t dex_pc_; |
| |
| // Indicates whether breakpoint needs full deoptimization or selective deoptimization. |
| DeoptimizationRequest::Kind deoptimization_kind_; |
| }; |
| |
| static std::ostream& operator<<(std::ostream& os, const Breakpoint& rhs) |
| REQUIRES_SHARED(Locks::mutator_lock_) { |
| os << StringPrintf("Breakpoint[%s @%#x]", ArtMethod::PrettyMethod(rhs.Method()).c_str(), |
| rhs.DexPc()); |
| return os; |
| } |
| |
| class DebugInstrumentationListener FINAL : public instrumentation::InstrumentationListener { |
| public: |
| DebugInstrumentationListener() {} |
| virtual ~DebugInstrumentationListener() {} |
| |
| void MethodEntered(Thread* thread, mirror::Object* this_object, ArtMethod* method, |
| uint32_t dex_pc) |
| OVERRIDE REQUIRES_SHARED(Locks::mutator_lock_) { |
| if (method->IsNative()) { |
| // TODO: post location events is a suspension point and native method entry stubs aren't. |
| return; |
| } |
| if (IsListeningToDexPcMoved()) { |
| // We also listen to kDexPcMoved instrumentation event so we know the DexPcMoved method is |
| // going to be called right after us. To avoid sending JDWP events twice for this location, |
| // we report the event in DexPcMoved. However, we must remind this is method entry so we |
| // send the METHOD_ENTRY event. And we can also group it with other events for this location |
| // like BREAKPOINT or SINGLE_STEP (or even METHOD_EXIT if this is a RETURN instruction). |
| thread->SetDebugMethodEntry(); |
| } else if (IsListeningToMethodExit() && IsReturn(method, dex_pc)) { |
| // We also listen to kMethodExited instrumentation event and the current instruction is a |
| // RETURN so we know the MethodExited method is going to be called right after us. To avoid |
| // sending JDWP events twice for this location, we report the event(s) in MethodExited. |
| // However, we must remind this is method entry so we send the METHOD_ENTRY event. And we can |
| // also group it with other events for this location like BREAKPOINT or SINGLE_STEP. |
| thread->SetDebugMethodEntry(); |
| } else { |
| Dbg::UpdateDebugger(thread, this_object, method, 0, Dbg::kMethodEntry, nullptr); |
| } |
| } |
| |
| void MethodExited(Thread* thread, mirror::Object* this_object, ArtMethod* method, |
| uint32_t dex_pc, const JValue& return_value) |
| OVERRIDE REQUIRES_SHARED(Locks::mutator_lock_) { |
| if (method->IsNative()) { |
| // TODO: post location events is a suspension point and native method entry stubs aren't. |
| return; |
| } |
| uint32_t events = Dbg::kMethodExit; |
| if (thread->IsDebugMethodEntry()) { |
| // It is also the method entry. |
| DCHECK(IsReturn(method, dex_pc)); |
| events |= Dbg::kMethodEntry; |
| thread->ClearDebugMethodEntry(); |
| } |
| Dbg::UpdateDebugger(thread, this_object, method, dex_pc, events, &return_value); |
| } |
| |
| void MethodUnwind(Thread* thread ATTRIBUTE_UNUSED, mirror::Object* this_object ATTRIBUTE_UNUSED, |
| ArtMethod* method, uint32_t dex_pc) |
| OVERRIDE REQUIRES_SHARED(Locks::mutator_lock_) { |
| // We're not recorded to listen to this kind of event, so complain. |
| LOG(ERROR) << "Unexpected method unwind event in debugger " << ArtMethod::PrettyMethod(method) |
| << " " << dex_pc; |
| } |
| |
| void DexPcMoved(Thread* thread, mirror::Object* this_object, ArtMethod* method, |
| uint32_t new_dex_pc) |
| OVERRIDE REQUIRES_SHARED(Locks::mutator_lock_) { |
| if (IsListeningToMethodExit() && IsReturn(method, new_dex_pc)) { |
| // We also listen to kMethodExited instrumentation event and the current instruction is a |
| // RETURN so we know the MethodExited method is going to be called right after us. Like in |
| // MethodEntered, we delegate event reporting to MethodExited. |
| // Besides, if this RETURN instruction is the only one in the method, we can send multiple |
| // JDWP events in the same packet: METHOD_ENTRY, METHOD_EXIT, BREAKPOINT and/or SINGLE_STEP. |
| // Therefore, we must not clear the debug method entry flag here. |
| } else { |
| uint32_t events = 0; |
| if (thread->IsDebugMethodEntry()) { |
| // It is also the method entry. |
| events = Dbg::kMethodEntry; |
| thread->ClearDebugMethodEntry(); |
| } |
| Dbg::UpdateDebugger(thread, this_object, method, new_dex_pc, events, nullptr); |
| } |
| } |
| |
| void FieldRead(Thread* thread ATTRIBUTE_UNUSED, mirror::Object* this_object, |
| ArtMethod* method, uint32_t dex_pc, ArtField* field) |
| OVERRIDE REQUIRES_SHARED(Locks::mutator_lock_) { |
| Dbg::PostFieldAccessEvent(method, dex_pc, this_object, field); |
| } |
| |
| void FieldWritten(Thread* thread ATTRIBUTE_UNUSED, mirror::Object* this_object, |
| ArtMethod* method, uint32_t dex_pc, ArtField* field, |
| const JValue& field_value) |
| OVERRIDE REQUIRES_SHARED(Locks::mutator_lock_) { |
| Dbg::PostFieldModificationEvent(method, dex_pc, this_object, field, &field_value); |
| } |
| |
| void ExceptionCaught(Thread* thread ATTRIBUTE_UNUSED, mirror::Throwable* exception_object) |
| OVERRIDE REQUIRES_SHARED(Locks::mutator_lock_) { |
| Dbg::PostException(exception_object); |
| } |
| |
| // We only care about branches in the Jit. |
| void Branch(Thread* /*thread*/, ArtMethod* method, uint32_t dex_pc, int32_t dex_pc_offset) |
| OVERRIDE REQUIRES_SHARED(Locks::mutator_lock_) { |
| LOG(ERROR) << "Unexpected branch event in debugger " << ArtMethod::PrettyMethod(method) |
| << " " << dex_pc << ", " << dex_pc_offset; |
| } |
| |
| // We only care about invokes in the Jit. |
| void InvokeVirtualOrInterface(Thread* thread ATTRIBUTE_UNUSED, |
| mirror::Object*, |
| ArtMethod* method, |
| uint32_t dex_pc, |
| ArtMethod*) |
| OVERRIDE REQUIRES_SHARED(Locks::mutator_lock_) { |
| LOG(ERROR) << "Unexpected invoke event in debugger " << ArtMethod::PrettyMethod(method) |
| << " " << dex_pc; |
| } |
| |
| private: |
| static bool IsReturn(ArtMethod* method, uint32_t dex_pc) |
| REQUIRES_SHARED(Locks::mutator_lock_) { |
| const DexFile::CodeItem* code_item = method->GetCodeItem(); |
| const Instruction* instruction = Instruction::At(&code_item->insns_[dex_pc]); |
| return instruction->IsReturn(); |
| } |
| |
| static bool IsListeningToDexPcMoved() REQUIRES_SHARED(Locks::mutator_lock_) { |
| return IsListeningTo(instrumentation::Instrumentation::kDexPcMoved); |
| } |
| |
| static bool IsListeningToMethodExit() REQUIRES_SHARED(Locks::mutator_lock_) { |
| return IsListeningTo(instrumentation::Instrumentation::kMethodExited); |
| } |
| |
| static bool IsListeningTo(instrumentation::Instrumentation::InstrumentationEvent event) |
| REQUIRES_SHARED(Locks::mutator_lock_) { |
| return (Dbg::GetInstrumentationEvents() & event) != 0; |
| } |
| |
| DISALLOW_COPY_AND_ASSIGN(DebugInstrumentationListener); |
| } gDebugInstrumentationListener; |
| |
| // JDWP is allowed unless the Zygote forbids it. |
| static bool gJdwpAllowed = true; |
| |
| // Was there a -Xrunjdwp or -agentlib:jdwp= argument on the command line? |
| static bool gJdwpConfigured = false; |
| |
| // JDWP options for debugging. Only valid if IsJdwpConfigured() is true. |
| static JDWP::JdwpOptions gJdwpOptions; |
| |
| // Runtime JDWP state. |
| static JDWP::JdwpState* gJdwpState = nullptr; |
| static bool gDebuggerConnected; // debugger or DDMS is connected. |
| |
| static bool gDdmThreadNotification = false; |
| |
| // DDMS GC-related settings. |
| static Dbg::HpifWhen gDdmHpifWhen = Dbg::HPIF_WHEN_NEVER; |
| static Dbg::HpsgWhen gDdmHpsgWhen = Dbg::HPSG_WHEN_NEVER; |
| static Dbg::HpsgWhat gDdmHpsgWhat; |
| static Dbg::HpsgWhen gDdmNhsgWhen = Dbg::HPSG_WHEN_NEVER; |
| static Dbg::HpsgWhat gDdmNhsgWhat; |
| |
| bool Dbg::gDebuggerActive = false; |
| bool Dbg::gDisposed = false; |
| ObjectRegistry* Dbg::gRegistry = nullptr; |
| |
| // Deoptimization support. |
| std::vector<DeoptimizationRequest> Dbg::deoptimization_requests_; |
| size_t Dbg::full_deoptimization_event_count_ = 0; |
| |
| // Instrumentation event reference counters. |
| size_t Dbg::dex_pc_change_event_ref_count_ = 0; |
| size_t Dbg::method_enter_event_ref_count_ = 0; |
| size_t Dbg::method_exit_event_ref_count_ = 0; |
| size_t Dbg::field_read_event_ref_count_ = 0; |
| size_t Dbg::field_write_event_ref_count_ = 0; |
| size_t Dbg::exception_catch_event_ref_count_ = 0; |
| uint32_t Dbg::instrumentation_events_ = 0; |
| |
| Dbg::DbgThreadLifecycleCallback Dbg::thread_lifecycle_callback_; |
| Dbg::DbgClassLoadCallback Dbg::class_load_callback_; |
| |
| // Breakpoints. |
| static std::vector<Breakpoint> gBreakpoints GUARDED_BY(Locks::breakpoint_lock_); |
| |
| void DebugInvokeReq::VisitRoots(RootVisitor* visitor, const RootInfo& root_info) { |
| receiver.VisitRootIfNonNull(visitor, root_info); // null for static method call. |
| klass.VisitRoot(visitor, root_info); |
| } |
| |
| void SingleStepControl::AddDexPc(uint32_t dex_pc) { |
| dex_pcs_.insert(dex_pc); |
| } |
| |
| bool SingleStepControl::ContainsDexPc(uint32_t dex_pc) const { |
| return dex_pcs_.find(dex_pc) == dex_pcs_.end(); |
| } |
| |
| static bool IsBreakpoint(ArtMethod* m, uint32_t dex_pc) |
| REQUIRES(!Locks::breakpoint_lock_) |
| REQUIRES_SHARED(Locks::mutator_lock_) { |
| ReaderMutexLock mu(Thread::Current(), *Locks::breakpoint_lock_); |
| for (size_t i = 0, e = gBreakpoints.size(); i < e; ++i) { |
| if (gBreakpoints[i].DexPc() == dex_pc && gBreakpoints[i].IsInMethod(m)) { |
| VLOG(jdwp) << "Hit breakpoint #" << i << ": " << gBreakpoints[i]; |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| static bool IsSuspendedForDebugger(ScopedObjectAccessUnchecked& soa, Thread* thread) |
| REQUIRES(!Locks::thread_suspend_count_lock_) { |
| MutexLock mu(soa.Self(), *Locks::thread_suspend_count_lock_); |
| // A thread may be suspended for GC; in this code, we really want to know whether |
| // there's a debugger suspension active. |
| return thread->IsSuspended() && thread->GetDebugSuspendCount() > 0; |
| } |
| |
| static mirror::Array* DecodeNonNullArray(JDWP::RefTypeId id, JDWP::JdwpError* error) |
| REQUIRES_SHARED(Locks::mutator_lock_) { |
| mirror::Object* o = Dbg::GetObjectRegistry()->Get<mirror::Object*>(id, error); |
| if (o == nullptr) { |
| *error = JDWP::ERR_INVALID_OBJECT; |
| return nullptr; |
| } |
| if (!o->IsArrayInstance()) { |
| *error = JDWP::ERR_INVALID_ARRAY; |
| return nullptr; |
| } |
| *error = JDWP::ERR_NONE; |
| return o->AsArray(); |
| } |
| |
| static mirror::Class* DecodeClass(JDWP::RefTypeId id, JDWP::JdwpError* error) |
| REQUIRES_SHARED(Locks::mutator_lock_) { |
| mirror::Object* o = Dbg::GetObjectRegistry()->Get<mirror::Object*>(id, error); |
| if (o == nullptr) { |
| *error = JDWP::ERR_INVALID_OBJECT; |
| return nullptr; |
| } |
| if (!o->IsClass()) { |
| *error = JDWP::ERR_INVALID_CLASS; |
| return nullptr; |
| } |
| *error = JDWP::ERR_NONE; |
| return o->AsClass(); |
| } |
| |
| static Thread* DecodeThread(ScopedObjectAccessUnchecked& soa, JDWP::ObjectId thread_id, |
| JDWP::JdwpError* error) |
| REQUIRES_SHARED(Locks::mutator_lock_) |
| REQUIRES(!Locks::thread_list_lock_, !Locks::thread_suspend_count_lock_) { |
| mirror::Object* thread_peer = Dbg::GetObjectRegistry()->Get<mirror::Object*>(thread_id, error); |
| if (thread_peer == nullptr) { |
| // This isn't even an object. |
| *error = JDWP::ERR_INVALID_OBJECT; |
| return nullptr; |
| } |
| |
| ObjPtr<mirror::Class> java_lang_Thread = |
| soa.Decode<mirror::Class>(WellKnownClasses::java_lang_Thread); |
| if (!java_lang_Thread->IsAssignableFrom(thread_peer->GetClass())) { |
| // This isn't a thread. |
| *error = JDWP::ERR_INVALID_THREAD; |
| return nullptr; |
| } |
| |
| MutexLock mu(soa.Self(), *Locks::thread_list_lock_); |
| Thread* thread = Thread::FromManagedThread(soa, thread_peer); |
| // If thread is null then this a java.lang.Thread without a Thread*. Must be a un-started or a |
| // zombie. |
| *error = (thread == nullptr) ? JDWP::ERR_THREAD_NOT_ALIVE : JDWP::ERR_NONE; |
| return thread; |
| } |
| |
| static JDWP::JdwpTag BasicTagFromDescriptor(const char* descriptor) { |
| // JDWP deliberately uses the descriptor characters' ASCII values for its enum. |
| // Note that by "basic" we mean that we don't get more specific than JT_OBJECT. |
| return static_cast<JDWP::JdwpTag>(descriptor[0]); |
| } |
| |
| static JDWP::JdwpTag BasicTagFromClass(mirror::Class* klass) |
| REQUIRES_SHARED(Locks::mutator_lock_) { |
| std::string temp; |
| const char* descriptor = klass->GetDescriptor(&temp); |
| return BasicTagFromDescriptor(descriptor); |
| } |
| |
| static JDWP::JdwpTag TagFromClass(const ScopedObjectAccessUnchecked& soa, mirror::Class* c) |
| REQUIRES_SHARED(Locks::mutator_lock_) { |
| CHECK(c != nullptr); |
| if (c->IsArrayClass()) { |
| return JDWP::JT_ARRAY; |
| } |
| if (c->IsStringClass()) { |
| return JDWP::JT_STRING; |
| } |
| if (c->IsClassClass()) { |
| return JDWP::JT_CLASS_OBJECT; |
| } |
| { |
| ObjPtr<mirror::Class> thread_class = |
| soa.Decode<mirror::Class>(WellKnownClasses::java_lang_Thread); |
| if (thread_class->IsAssignableFrom(c)) { |
| return JDWP::JT_THREAD; |
| } |
| } |
| { |
| ObjPtr<mirror::Class> thread_group_class = |
| soa.Decode<mirror::Class>(WellKnownClasses::java_lang_ThreadGroup); |
| if (thread_group_class->IsAssignableFrom(c)) { |
| return JDWP::JT_THREAD_GROUP; |
| } |
| } |
| { |
| ObjPtr<mirror::Class> class_loader_class = |
| soa.Decode<mirror::Class>(WellKnownClasses::java_lang_ClassLoader); |
| if (class_loader_class->IsAssignableFrom(c)) { |
| return JDWP::JT_CLASS_LOADER; |
| } |
| } |
| return JDWP::JT_OBJECT; |
| } |
| |
| /* |
| * Objects declared to hold Object might actually hold a more specific |
| * type. The debugger may take a special interest in these (e.g. it |
| * wants to display the contents of Strings), so we want to return an |
| * appropriate tag. |
| * |
| * Null objects are tagged JT_OBJECT. |
| */ |
| JDWP::JdwpTag Dbg::TagFromObject(const ScopedObjectAccessUnchecked& soa, mirror::Object* o) { |
| return (o == nullptr) ? JDWP::JT_OBJECT : TagFromClass(soa, o->GetClass()); |
| } |
| |
| static bool IsPrimitiveTag(JDWP::JdwpTag tag) { |
| switch (tag) { |
| case JDWP::JT_BOOLEAN: |
| case JDWP::JT_BYTE: |
| case JDWP::JT_CHAR: |
| case JDWP::JT_FLOAT: |
| case JDWP::JT_DOUBLE: |
| case JDWP::JT_INT: |
| case JDWP::JT_LONG: |
| case JDWP::JT_SHORT: |
| case JDWP::JT_VOID: |
| return true; |
| default: |
| return false; |
| } |
| } |
| |
| void Dbg::StartJdwp() { |
| if (!gJdwpAllowed || !IsJdwpConfigured()) { |
| // No JDWP for you! |
| return; |
| } |
| |
| CHECK(gRegistry == nullptr); |
| gRegistry = new ObjectRegistry; |
| |
| // Init JDWP if the debugger is enabled. This may connect out to a |
| // debugger, passively listen for a debugger, or block waiting for a |
| // debugger. |
| gJdwpState = JDWP::JdwpState::Create(&gJdwpOptions); |
| if (gJdwpState == nullptr) { |
| // We probably failed because some other process has the port already, which means that |
| // if we don't abort the user is likely to think they're talking to us when they're actually |
| // talking to that other process. |
| LOG(FATAL) << "Debugger thread failed to initialize"; |
| } |
| |
| // If a debugger has already attached, send the "welcome" message. |
| // This may cause us to suspend all threads. |
| if (gJdwpState->IsActive()) { |
| ScopedObjectAccess soa(Thread::Current()); |
| gJdwpState->PostVMStart(); |
| } |
| } |
| |
| void Dbg::StopJdwp() { |
| // Post VM_DEATH event before the JDWP connection is closed (either by the JDWP thread or the |
| // destruction of gJdwpState). |
| if (gJdwpState != nullptr && gJdwpState->IsActive()) { |
| gJdwpState->PostVMDeath(); |
| } |
| // Prevent the JDWP thread from processing JDWP incoming packets after we close the connection. |
| Dispose(); |
| delete gJdwpState; |
| gJdwpState = nullptr; |
| delete gRegistry; |
| gRegistry = nullptr; |
| } |
| |
| void Dbg::GcDidFinish() { |
| if (gDdmHpifWhen != HPIF_WHEN_NEVER) { |
| ScopedObjectAccess soa(Thread::Current()); |
| VLOG(jdwp) << "Sending heap info to DDM"; |
| DdmSendHeapInfo(gDdmHpifWhen); |
| } |
| if (gDdmHpsgWhen != HPSG_WHEN_NEVER) { |
| ScopedObjectAccess soa(Thread::Current()); |
| VLOG(jdwp) << "Dumping heap to DDM"; |
| DdmSendHeapSegments(false); |
| } |
| if (gDdmNhsgWhen != HPSG_WHEN_NEVER) { |
| ScopedObjectAccess soa(Thread::Current()); |
| VLOG(jdwp) << "Dumping native heap to DDM"; |
| DdmSendHeapSegments(true); |
| } |
| } |
| |
| void Dbg::SetJdwpAllowed(bool allowed) { |
| gJdwpAllowed = allowed; |
| } |
| |
| bool Dbg::IsJdwpAllowed() { |
| return gJdwpAllowed; |
| } |
| |
| DebugInvokeReq* Dbg::GetInvokeReq() { |
| return Thread::Current()->GetInvokeReq(); |
| } |
| |
| Thread* Dbg::GetDebugThread() { |
| return (gJdwpState != nullptr) ? gJdwpState->GetDebugThread() : nullptr; |
| } |
| |
| void Dbg::ClearWaitForEventThread() { |
| gJdwpState->ReleaseJdwpTokenForEvent(); |
| } |
| |
| void Dbg::Connected() { |
| CHECK(!gDebuggerConnected); |
| VLOG(jdwp) << "JDWP has attached"; |
| gDebuggerConnected = true; |
| gDisposed = false; |
| } |
| |
| bool Dbg::RequiresDeoptimization() { |
| // We don't need deoptimization if everything runs with interpreter after |
| // enabling -Xint mode. |
| return !Runtime::Current()->GetInstrumentation()->IsForcedInterpretOnly(); |
| } |
| |
| void Dbg::GoActive() { |
| // Enable all debugging features, including scans for breakpoints. |
| // This is a no-op if we're already active. |
| // Only called from the JDWP handler thread. |
| if (IsDebuggerActive()) { |
| return; |
| } |
| |
| Thread* const self = Thread::Current(); |
| { |
| // TODO: dalvik only warned if there were breakpoints left over. clear in Dbg::Disconnected? |
| ReaderMutexLock mu(self, *Locks::breakpoint_lock_); |
| CHECK_EQ(gBreakpoints.size(), 0U); |
| } |
| |
| { |
| MutexLock mu(self, *Locks::deoptimization_lock_); |
| CHECK_EQ(deoptimization_requests_.size(), 0U); |
| CHECK_EQ(full_deoptimization_event_count_, 0U); |
| CHECK_EQ(dex_pc_change_event_ref_count_, 0U); |
| CHECK_EQ(method_enter_event_ref_count_, 0U); |
| CHECK_EQ(method_exit_event_ref_count_, 0U); |
| CHECK_EQ(field_read_event_ref_count_, 0U); |
| CHECK_EQ(field_write_event_ref_count_, 0U); |
| CHECK_EQ(exception_catch_event_ref_count_, 0U); |
| } |
| |
| Runtime* runtime = Runtime::Current(); |
| // Best effort deoptimization if the runtime is non-Java debuggable. This happens when |
| // ro.debuggable is set, but the application is not debuggable, or when a standalone |
| // dalvikvm invocation is not passed the debuggable option (-Xcompiler-option --debuggable). |
| // |
| // The performance cost of this is non-negligible during native-debugging due to the |
| // forced JIT, so we keep the AOT code in that case in exchange for limited native debugging. |
| if (!runtime->IsJavaDebuggable() && |
| !runtime->GetInstrumentation()->IsForcedInterpretOnly() && |
| !runtime->IsNativeDebuggable()) { |
| runtime->DeoptimizeBootImage(); |
| } |
| |
| ScopedSuspendAll ssa(__FUNCTION__); |
| if (RequiresDeoptimization()) { |
| runtime->GetInstrumentation()->EnableDeoptimization(); |
| } |
| instrumentation_events_ = 0; |
| gDebuggerActive = true; |
| LOG(INFO) << "Debugger is active"; |
| } |
| |
| void Dbg::Disconnected() { |
| CHECK(gDebuggerConnected); |
| |
| LOG(INFO) << "Debugger is no longer active"; |
| |
| // Suspend all threads and exclusively acquire the mutator lock. Remove the debugger as a listener |
| // and clear the object registry. |
| Runtime* runtime = Runtime::Current(); |
| Thread* self = Thread::Current(); |
| { |
| // Required for DisableDeoptimization. |
| gc::ScopedGCCriticalSection gcs(self, |
| gc::kGcCauseInstrumentation, |
| gc::kCollectorTypeInstrumentation); |
| ScopedSuspendAll ssa(__FUNCTION__); |
| // Debugger may not be active at this point. |
| if (IsDebuggerActive()) { |
| { |
| // Since we're going to disable deoptimization, we clear the deoptimization requests queue. |
| // This prevents us from having any pending deoptimization request when the debugger attaches |
| // to us again while no event has been requested yet. |
| MutexLock mu(self, *Locks::deoptimization_lock_); |
| deoptimization_requests_.clear(); |
| full_deoptimization_event_count_ = 0U; |
| } |
| if (instrumentation_events_ != 0) { |
| runtime->GetInstrumentation()->RemoveListener(&gDebugInstrumentationListener, |
| instrumentation_events_); |
| instrumentation_events_ = 0; |
| } |
| if (RequiresDeoptimization()) { |
| runtime->GetInstrumentation()->DisableDeoptimization(kDbgInstrumentationKey); |
| } |
| gDebuggerActive = false; |
| } |
| } |
| |
| { |
| ScopedObjectAccess soa(self); |
| gRegistry->Clear(); |
| } |
| |
| gDebuggerConnected = false; |
| } |
| |
| void Dbg::ConfigureJdwp(const JDWP::JdwpOptions& jdwp_options) { |
| CHECK_NE(jdwp_options.transport, JDWP::kJdwpTransportUnknown); |
| gJdwpOptions = jdwp_options; |
| gJdwpConfigured = true; |
| } |
| |
| bool Dbg::IsJdwpConfigured() { |
| return gJdwpConfigured; |
| } |
| |
| int64_t Dbg::LastDebuggerActivity() { |
| return gJdwpState->LastDebuggerActivity(); |
| } |
| |
| void Dbg::UndoDebuggerSuspensions() { |
| Runtime::Current()->GetThreadList()->UndoDebuggerSuspensions(); |
| } |
| |
| std::string Dbg::GetClassName(JDWP::RefTypeId class_id) { |
| JDWP::JdwpError error; |
| mirror::Object* o = gRegistry->Get<mirror::Object*>(class_id, &error); |
| if (o == nullptr) { |
| if (error == JDWP::ERR_NONE) { |
| return "null"; |
| } else { |
| return StringPrintf("invalid object %p", reinterpret_cast<void*>(class_id)); |
| } |
| } |
| if (!o->IsClass()) { |
| return StringPrintf("non-class %p", o); // This is only used for debugging output anyway. |
| } |
| return GetClassName(o->AsClass()); |
| } |
| |
| std::string Dbg::GetClassName(mirror::Class* klass) { |
| if (klass == nullptr) { |
| return "null"; |
| } |
| std::string temp; |
| return DescriptorToName(klass->GetDescriptor(&temp)); |
| } |
| |
| JDWP::JdwpError Dbg::GetClassObject(JDWP::RefTypeId id, JDWP::ObjectId* class_object_id) { |
| JDWP::JdwpError status; |
| mirror::Class* c = DecodeClass(id, &status); |
| if (c == nullptr) { |
| *class_object_id = 0; |
| return status; |
| } |
| *class_object_id = gRegistry->Add(c); |
| return JDWP::ERR_NONE; |
| } |
| |
| JDWP::JdwpError Dbg::GetSuperclass(JDWP::RefTypeId id, JDWP::RefTypeId* superclass_id) { |
| JDWP::JdwpError status; |
| mirror::Class* c = DecodeClass(id, &status); |
| if (c == nullptr) { |
| *superclass_id = 0; |
| return status; |
| } |
| if (c->IsInterface()) { |
| // http://code.google.com/p/android/issues/detail?id=20856 |
| *superclass_id = 0; |
| } else { |
| *superclass_id = gRegistry->Add(c->GetSuperClass()); |
| } |
| return JDWP::ERR_NONE; |
| } |
| |
| JDWP::JdwpError Dbg::GetClassLoader(JDWP::RefTypeId id, JDWP::ExpandBuf* pReply) { |
| JDWP::JdwpError error; |
| mirror::Class* c = DecodeClass(id, &error); |
| if (c == nullptr) { |
| return error; |
| } |
| expandBufAddObjectId(pReply, gRegistry->Add(c->GetClassLoader())); |
| return JDWP::ERR_NONE; |
| } |
| |
| JDWP::JdwpError Dbg::GetModifiers(JDWP::RefTypeId id, JDWP::ExpandBuf* pReply) { |
| JDWP::JdwpError error; |
| mirror::Class* c = DecodeClass(id, &error); |
| if (c == nullptr) { |
| return error; |
| } |
| |
| uint32_t access_flags = c->GetAccessFlags() & kAccJavaFlagsMask; |
| |
| // Set ACC_SUPER. Dex files don't contain this flag but only classes are supposed to have it set, |
| // not interfaces. |
| // Class.getModifiers doesn't return it, but JDWP does, so we set it here. |
| if ((access_flags & kAccInterface) == 0) { |
| access_flags |= kAccSuper; |
| } |
| |
| expandBufAdd4BE(pReply, access_flags); |
| |
| return JDWP::ERR_NONE; |
| } |
| |
| JDWP::JdwpError Dbg::GetMonitorInfo(JDWP::ObjectId object_id, JDWP::ExpandBuf* reply) { |
| JDWP::JdwpError error; |
| mirror::Object* o = gRegistry->Get<mirror::Object*>(object_id, &error); |
| if (o == nullptr) { |
| return JDWP::ERR_INVALID_OBJECT; |
| } |
| |
| // Ensure all threads are suspended while we read objects' lock words. |
| Thread* self = Thread::Current(); |
| CHECK_EQ(self->GetState(), kRunnable); |
| |
| MonitorInfo monitor_info; |
| { |
| ScopedThreadSuspension sts(self, kSuspended); |
| ScopedSuspendAll ssa(__FUNCTION__); |
| monitor_info = MonitorInfo(o); |
| } |
| if (monitor_info.owner_ != nullptr) { |
| expandBufAddObjectId(reply, gRegistry->Add(monitor_info.owner_->GetPeerFromOtherThread())); |
| } else { |
| expandBufAddObjectId(reply, gRegistry->Add(nullptr)); |
| } |
| expandBufAdd4BE(reply, monitor_info.entry_count_); |
| expandBufAdd4BE(reply, monitor_info.waiters_.size()); |
| for (size_t i = 0; i < monitor_info.waiters_.size(); ++i) { |
| expandBufAddObjectId(reply, gRegistry->Add(monitor_info.waiters_[i]->GetPeerFromOtherThread())); |
| } |
| return JDWP::ERR_NONE; |
| } |
| |
| JDWP::JdwpError Dbg::GetOwnedMonitors(JDWP::ObjectId thread_id, |
| std::vector<JDWP::ObjectId>* monitors, |
| std::vector<uint32_t>* stack_depths) { |
| struct OwnedMonitorVisitor : public StackVisitor { |
| OwnedMonitorVisitor(Thread* thread, Context* context, |
| std::vector<JDWP::ObjectId>* monitor_vector, |
| std::vector<uint32_t>* stack_depth_vector) |
| REQUIRES_SHARED(Locks::mutator_lock_) |
| : StackVisitor(thread, context, StackVisitor::StackWalkKind::kIncludeInlinedFrames), |
| current_stack_depth(0), |
| monitors(monitor_vector), |
| stack_depths(stack_depth_vector) {} |
| |
| // TODO: Enable annotalysis. We know lock is held in constructor, but abstraction confuses |
| // annotalysis. |
| bool VisitFrame() NO_THREAD_SAFETY_ANALYSIS { |
| if (!GetMethod()->IsRuntimeMethod()) { |
| Monitor::VisitLocks(this, AppendOwnedMonitors, this); |
| ++current_stack_depth; |
| } |
| return true; |
| } |
| |
| static void AppendOwnedMonitors(mirror::Object* owned_monitor, void* arg) |
| REQUIRES_SHARED(Locks::mutator_lock_) { |
| OwnedMonitorVisitor* visitor = reinterpret_cast<OwnedMonitorVisitor*>(arg); |
| visitor->monitors->push_back(gRegistry->Add(owned_monitor)); |
| visitor->stack_depths->push_back(visitor->current_stack_depth); |
| } |
| |
| size_t current_stack_depth; |
| std::vector<JDWP::ObjectId>* const monitors; |
| std::vector<uint32_t>* const stack_depths; |
| }; |
| |
| ScopedObjectAccessUnchecked soa(Thread::Current()); |
| JDWP::JdwpError error; |
| Thread* thread = DecodeThread(soa, thread_id, &error); |
| if (thread == nullptr) { |
| return error; |
| } |
| if (!IsSuspendedForDebugger(soa, thread)) { |
| return JDWP::ERR_THREAD_NOT_SUSPENDED; |
| } |
| std::unique_ptr<Context> context(Context::Create()); |
| OwnedMonitorVisitor visitor(thread, context.get(), monitors, stack_depths); |
| visitor.WalkStack(); |
| return JDWP::ERR_NONE; |
| } |
| |
| JDWP::JdwpError Dbg::GetContendedMonitor(JDWP::ObjectId thread_id, |
| JDWP::ObjectId* contended_monitor) { |
| ScopedObjectAccessUnchecked soa(Thread::Current()); |
| *contended_monitor = 0; |
| JDWP::JdwpError error; |
| Thread* thread = DecodeThread(soa, thread_id, &error); |
| if (thread == nullptr) { |
| return error; |
| } |
| if (!IsSuspendedForDebugger(soa, thread)) { |
| return JDWP::ERR_THREAD_NOT_SUSPENDED; |
| } |
| mirror::Object* contended_monitor_obj = Monitor::GetContendedMonitor(thread); |
| // Add() requires the thread_list_lock_ not held to avoid the lock |
| // level violation. |
| *contended_monitor = gRegistry->Add(contended_monitor_obj); |
| return JDWP::ERR_NONE; |
| } |
| |
| JDWP::JdwpError Dbg::GetInstanceCounts(const std::vector<JDWP::RefTypeId>& class_ids, |
| std::vector<uint64_t>* counts) { |
| gc::Heap* heap = Runtime::Current()->GetHeap(); |
| heap->CollectGarbage(false); |
| VariableSizedHandleScope hs(Thread::Current()); |
| std::vector<Handle<mirror::Class>> classes; |
| counts->clear(); |
| for (size_t i = 0; i < class_ids.size(); ++i) { |
| JDWP::JdwpError error; |
| ObjPtr<mirror::Class> c = DecodeClass(class_ids[i], &error); |
| if (c == nullptr) { |
| return error; |
| } |
| classes.push_back(hs.NewHandle(c)); |
| counts->push_back(0); |
| } |
| heap->CountInstances(classes, false, &(*counts)[0]); |
| return JDWP::ERR_NONE; |
| } |
| |
| JDWP::JdwpError Dbg::GetInstances(JDWP::RefTypeId class_id, int32_t max_count, |
| std::vector<JDWP::ObjectId>* instances) { |
| gc::Heap* heap = Runtime::Current()->GetHeap(); |
| // We only want reachable instances, so do a GC. |
| heap->CollectGarbage(false); |
| JDWP::JdwpError error; |
| ObjPtr<mirror::Class> c = DecodeClass(class_id, &error); |
| if (c == nullptr) { |
| return error; |
| } |
| VariableSizedHandleScope hs(Thread::Current()); |
| std::vector<Handle<mirror::Object>> raw_instances; |
| Runtime::Current()->GetHeap()->GetInstances(hs, hs.NewHandle(c), max_count, raw_instances); |
| for (size_t i = 0; i < raw_instances.size(); ++i) { |
| instances->push_back(gRegistry->Add(raw_instances[i].Get())); |
| } |
| return JDWP::ERR_NONE; |
| } |
| |
| JDWP::JdwpError Dbg::GetReferringObjects(JDWP::ObjectId object_id, int32_t max_count, |
| std::vector<JDWP::ObjectId>* referring_objects) { |
| gc::Heap* heap = Runtime::Current()->GetHeap(); |
| heap->CollectGarbage(false); |
| JDWP::JdwpError error; |
| ObjPtr<mirror::Object> o = gRegistry->Get<mirror::Object*>(object_id, &error); |
| if (o == nullptr) { |
| return JDWP::ERR_INVALID_OBJECT; |
| } |
| VariableSizedHandleScope hs(Thread::Current()); |
| std::vector<Handle<mirror::Object>> raw_instances; |
| heap->GetReferringObjects(hs, hs.NewHandle(o), max_count, raw_instances); |
| for (size_t i = 0; i < raw_instances.size(); ++i) { |
| referring_objects->push_back(gRegistry->Add(raw_instances[i].Get())); |
| } |
| return JDWP::ERR_NONE; |
| } |
| |
| JDWP::JdwpError Dbg::DisableCollection(JDWP::ObjectId object_id) { |
| JDWP::JdwpError error; |
| mirror::Object* o = gRegistry->Get<mirror::Object*>(object_id, &error); |
| if (o == nullptr) { |
| return JDWP::ERR_INVALID_OBJECT; |
| } |
| gRegistry->DisableCollection(object_id); |
| return JDWP::ERR_NONE; |
| } |
| |
| JDWP::JdwpError Dbg::EnableCollection(JDWP::ObjectId object_id) { |
| JDWP::JdwpError error; |
| mirror::Object* o = gRegistry->Get<mirror::Object*>(object_id, &error); |
| // Unlike DisableCollection, JDWP specs do not state an invalid object causes an error. The RI |
| // also ignores these cases and never return an error. However it's not obvious why this command |
| // should behave differently from DisableCollection and IsCollected commands. So let's be more |
| // strict and return an error if this happens. |
| if (o == nullptr) { |
| return JDWP::ERR_INVALID_OBJECT; |
| } |
| gRegistry->EnableCollection(object_id); |
| return JDWP::ERR_NONE; |
| } |
| |
| JDWP::JdwpError Dbg::IsCollected(JDWP::ObjectId object_id, bool* is_collected) { |
| *is_collected = true; |
| if (object_id == 0) { |
| // Null object id is invalid. |
| return JDWP::ERR_INVALID_OBJECT; |
| } |
| // JDWP specs state an INVALID_OBJECT error is returned if the object ID is not valid. However |
| // the RI seems to ignore this and assume object has been collected. |
| JDWP::JdwpError error; |
| mirror::Object* o = gRegistry->Get<mirror::Object*>(object_id, &error); |
| if (o != nullptr) { |
| *is_collected = gRegistry->IsCollected(object_id); |
| } |
| return JDWP::ERR_NONE; |
| } |
| |
| void Dbg::DisposeObject(JDWP::ObjectId object_id, uint32_t reference_count) { |
| gRegistry->DisposeObject(object_id, reference_count); |
| } |
| |
| JDWP::JdwpTypeTag Dbg::GetTypeTag(ObjPtr<mirror::Class> klass) { |
| DCHECK(klass != nullptr); |
| if (klass->IsArrayClass()) { |
| return JDWP::TT_ARRAY; |
| } else if (klass->IsInterface()) { |
| return JDWP::TT_INTERFACE; |
| } else { |
| return JDWP::TT_CLASS; |
| } |
| } |
| |
| JDWP::JdwpError Dbg::GetReflectedType(JDWP::RefTypeId class_id, JDWP::ExpandBuf* pReply) { |
| JDWP::JdwpError error; |
| mirror::Class* c = DecodeClass(class_id, &error); |
| if (c == nullptr) { |
| return error; |
| } |
| |
| JDWP::JdwpTypeTag type_tag = GetTypeTag(c); |
| expandBufAdd1(pReply, type_tag); |
| expandBufAddRefTypeId(pReply, class_id); |
| return JDWP::ERR_NONE; |
| } |
| |
| // Get the complete list of reference classes (i.e. all classes except |
| // the primitive types). |
| // Returns a newly-allocated buffer full of RefTypeId values. |
| class ClassListCreator : public ClassVisitor { |
| public: |
| explicit ClassListCreator(std::vector<JDWP::RefTypeId>* classes) : classes_(classes) {} |
| |
| bool operator()(ObjPtr<mirror::Class> c) OVERRIDE REQUIRES_SHARED(Locks::mutator_lock_) { |
| if (!c->IsPrimitive()) { |
| classes_->push_back(Dbg::GetObjectRegistry()->AddRefType(c)); |
| } |
| return true; |
| } |
| |
| private: |
| std::vector<JDWP::RefTypeId>* const classes_; |
| }; |
| |
| void Dbg::GetClassList(std::vector<JDWP::RefTypeId>* classes) { |
| ClassListCreator clc(classes); |
| Runtime::Current()->GetClassLinker()->VisitClassesWithoutClassesLock(&clc); |
| } |
| |
| JDWP::JdwpError Dbg::GetClassInfo(JDWP::RefTypeId class_id, JDWP::JdwpTypeTag* pTypeTag, |
| uint32_t* pStatus, std::string* pDescriptor) { |
| JDWP::JdwpError error; |
| mirror::Class* c = DecodeClass(class_id, &error); |
| if (c == nullptr) { |
| return error; |
| } |
| |
| if (c->IsArrayClass()) { |
| *pStatus = JDWP::CS_VERIFIED | JDWP::CS_PREPARED; |
| *pTypeTag = JDWP::TT_ARRAY; |
| } else { |
| if (c->IsErroneous()) { |
| *pStatus = JDWP::CS_ERROR; |
| } else { |
| *pStatus = JDWP::CS_VERIFIED | JDWP::CS_PREPARED | JDWP::CS_INITIALIZED; |
| } |
| *pTypeTag = c->IsInterface() ? JDWP::TT_INTERFACE : JDWP::TT_CLASS; |
| } |
| |
| if (pDescriptor != nullptr) { |
| std::string temp; |
| *pDescriptor = c->GetDescriptor(&temp); |
| } |
| return JDWP::ERR_NONE; |
| } |
| |
| void Dbg::FindLoadedClassBySignature(const char* descriptor, std::vector<JDWP::RefTypeId>* ids) { |
| std::vector<ObjPtr<mirror::Class>> classes; |
| Runtime::Current()->GetClassLinker()->LookupClasses(descriptor, classes); |
| ids->clear(); |
| for (ObjPtr<mirror::Class> c : classes) { |
| ids->push_back(gRegistry->Add(c)); |
| } |
| } |
| |
| JDWP::JdwpError Dbg::GetReferenceType(JDWP::ObjectId object_id, JDWP::ExpandBuf* pReply) { |
| JDWP::JdwpError error; |
| mirror::Object* o = gRegistry->Get<mirror::Object*>(object_id, &error); |
| if (o == nullptr) { |
| return JDWP::ERR_INVALID_OBJECT; |
| } |
| |
| JDWP::JdwpTypeTag type_tag = GetTypeTag(o->GetClass()); |
| JDWP::RefTypeId type_id = gRegistry->AddRefType(o->GetClass()); |
| |
| expandBufAdd1(pReply, type_tag); |
| expandBufAddRefTypeId(pReply, type_id); |
| |
| return JDWP::ERR_NONE; |
| } |
| |
| JDWP::JdwpError Dbg::GetSignature(JDWP::RefTypeId class_id, std::string* signature) { |
| JDWP::JdwpError error; |
| mirror::Class* c = DecodeClass(class_id, &error); |
| if (c == nullptr) { |
| return error; |
| } |
| std::string temp; |
| *signature = c->GetDescriptor(&temp); |
| return JDWP::ERR_NONE; |
| } |
| |
| JDWP::JdwpError Dbg::GetSourceFile(JDWP::RefTypeId class_id, std::string* result) { |
| JDWP::JdwpError error; |
| mirror::Class* c = DecodeClass(class_id, &error); |
| if (c == nullptr) { |
| return error; |
| } |
| const char* source_file = c->GetSourceFile(); |
| if (source_file == nullptr) { |
| return JDWP::ERR_ABSENT_INFORMATION; |
| } |
| *result = source_file; |
| return JDWP::ERR_NONE; |
| } |
| |
| JDWP::JdwpError Dbg::GetObjectTag(JDWP::ObjectId object_id, uint8_t* tag) { |
| ScopedObjectAccessUnchecked soa(Thread::Current()); |
| JDWP::JdwpError error; |
| mirror::Object* o = gRegistry->Get<mirror::Object*>(object_id, &error); |
| if (error != JDWP::ERR_NONE) { |
| *tag = JDWP::JT_VOID; |
| return error; |
| } |
| *tag = TagFromObject(soa, o); |
| return JDWP::ERR_NONE; |
| } |
| |
| size_t Dbg::GetTagWidth(JDWP::JdwpTag tag) { |
| switch (tag) { |
| case JDWP::JT_VOID: |
| return 0; |
| case JDWP::JT_BYTE: |
| case JDWP::JT_BOOLEAN: |
| return 1; |
| case JDWP::JT_CHAR: |
| case JDWP::JT_SHORT: |
| return 2; |
| case JDWP::JT_FLOAT: |
| case JDWP::JT_INT: |
| return 4; |
| case JDWP::JT_ARRAY: |
| case JDWP::JT_OBJECT: |
| case JDWP::JT_STRING: |
| case JDWP::JT_THREAD: |
| case JDWP::JT_THREAD_GROUP: |
| case JDWP::JT_CLASS_LOADER: |
| case JDWP::JT_CLASS_OBJECT: |
| return sizeof(JDWP::ObjectId); |
| case JDWP::JT_DOUBLE: |
| case JDWP::JT_LONG: |
| return 8; |
| default: |
| LOG(FATAL) << "Unknown tag " << tag; |
| return -1; |
| } |
| } |
| |
| JDWP::JdwpError Dbg::GetArrayLength(JDWP::ObjectId array_id, int32_t* length) { |
| JDWP::JdwpError error; |
| mirror::Array* a = DecodeNonNullArray(array_id, &error); |
| if (a == nullptr) { |
| return error; |
| } |
| *length = a->GetLength(); |
| return JDWP::ERR_NONE; |
| } |
| |
| JDWP::JdwpError Dbg::OutputArray(JDWP::ObjectId array_id, int offset, int count, JDWP::ExpandBuf* pReply) { |
| JDWP::JdwpError error; |
| mirror::Array* a = DecodeNonNullArray(array_id, &error); |
| if (a == nullptr) { |
| return error; |
| } |
| |
| if (offset < 0 || count < 0 || offset > a->GetLength() || a->GetLength() - offset < count) { |
| LOG(WARNING) << __FUNCTION__ << " access out of bounds: offset=" << offset << "; count=" << count; |
| return JDWP::ERR_INVALID_LENGTH; |
| } |
| JDWP::JdwpTag element_tag = BasicTagFromClass(a->GetClass()->GetComponentType()); |
| expandBufAdd1(pReply, element_tag); |
| expandBufAdd4BE(pReply, count); |
| |
| if (IsPrimitiveTag(element_tag)) { |
| size_t width = GetTagWidth(element_tag); |
| uint8_t* dst = expandBufAddSpace(pReply, count * width); |
| if (width == 8) { |
| const uint64_t* src8 = reinterpret_cast<uint64_t*>(a->GetRawData(sizeof(uint64_t), 0)); |
| for (int i = 0; i < count; ++i) JDWP::Write8BE(&dst, src8[offset + i]); |
| } else if (width == 4) { |
| const uint32_t* src4 = reinterpret_cast<uint32_t*>(a->GetRawData(sizeof(uint32_t), 0)); |
| for (int i = 0; i < count; ++i) JDWP::Write4BE(&dst, src4[offset + i]); |
| } else if (width == 2) { |
| const uint16_t* src2 = reinterpret_cast<uint16_t*>(a->GetRawData(sizeof(uint16_t), 0)); |
| for (int i = 0; i < count; ++i) JDWP::Write2BE(&dst, src2[offset + i]); |
| } else { |
| const uint8_t* src = reinterpret_cast<uint8_t*>(a->GetRawData(sizeof(uint8_t), 0)); |
| memcpy(dst, &src[offset * width], count * width); |
| } |
| } else { |
| ScopedObjectAccessUnchecked soa(Thread::Current()); |
| mirror::ObjectArray<mirror::Object>* oa = a->AsObjectArray<mirror::Object>(); |
| for (int i = 0; i < count; ++i) { |
| mirror::Object* element = oa->Get(offset + i); |
| JDWP::JdwpTag specific_tag = (element != nullptr) ? TagFromObject(soa, element) |
| : element_tag; |
| expandBufAdd1(pReply, specific_tag); |
| expandBufAddObjectId(pReply, gRegistry->Add(element)); |
| } |
| } |
| |
| return JDWP::ERR_NONE; |
| } |
| |
| template <typename T> |
| static void CopyArrayData(mirror::Array* a, JDWP::Request* src, int offset, int count) |
| NO_THREAD_SAFETY_ANALYSIS { |
| // TODO: fix when annotalysis correctly handles non-member functions. |
| DCHECK(a->GetClass()->IsPrimitiveArray()); |
| |
| T* dst = reinterpret_cast<T*>(a->GetRawData(sizeof(T), offset)); |
| for (int i = 0; i < count; ++i) { |
| *dst++ = src->ReadValue(sizeof(T)); |
| } |
| } |
| |
| JDWP::JdwpError Dbg::SetArrayElements(JDWP::ObjectId array_id, int offset, int count, |
| JDWP::Request* request) { |
| JDWP::JdwpError error; |
| mirror::Array* dst = DecodeNonNullArray(array_id, &error); |
| if (dst == nullptr) { |
| return error; |
| } |
| |
| if (offset < 0 || count < 0 || offset > dst->GetLength() || dst->GetLength() - offset < count) { |
| LOG(WARNING) << __FUNCTION__ << " access out of bounds: offset=" << offset << "; count=" << count; |
| return JDWP::ERR_INVALID_LENGTH; |
| } |
| JDWP::JdwpTag element_tag = BasicTagFromClass(dst->GetClass()->GetComponentType()); |
| |
| if (IsPrimitiveTag(element_tag)) { |
| size_t width = GetTagWidth(element_tag); |
| if (width == 8) { |
| CopyArrayData<uint64_t>(dst, request, offset, count); |
| } else if (width == 4) { |
| CopyArrayData<uint32_t>(dst, request, offset, count); |
| } else if (width == 2) { |
| CopyArrayData<uint16_t>(dst, request, offset, count); |
| } else { |
| CopyArrayData<uint8_t>(dst, request, offset, count); |
| } |
| } else { |
| mirror::ObjectArray<mirror::Object>* oa = dst->AsObjectArray<mirror::Object>(); |
| for (int i = 0; i < count; ++i) { |
| JDWP::ObjectId id = request->ReadObjectId(); |
| mirror::Object* o = gRegistry->Get<mirror::Object*>(id, &error); |
| if (error != JDWP::ERR_NONE) { |
| return error; |
| } |
| // Check if the object's type is compatible with the array's type. |
| if (o != nullptr && !o->InstanceOf(oa->GetClass()->GetComponentType())) { |
| return JDWP::ERR_TYPE_MISMATCH; |
| } |
| oa->Set<false>(offset + i, o); |
| } |
| } |
| |
| return JDWP::ERR_NONE; |
| } |
| |
| JDWP::JdwpError Dbg::CreateString(const std::string& str, JDWP::ObjectId* new_string_id) { |
| Thread* self = Thread::Current(); |
| mirror::String* new_string = mirror::String::AllocFromModifiedUtf8(self, str.c_str()); |
| if (new_string == nullptr) { |
| DCHECK(self->IsExceptionPending()); |
| self->ClearException(); |
| LOG(ERROR) << "Could not allocate string"; |
| *new_string_id = 0; |
| return JDWP::ERR_OUT_OF_MEMORY; |
| } |
| *new_string_id = gRegistry->Add(new_string); |
| return JDWP::ERR_NONE; |
| } |
| |
| JDWP::JdwpError Dbg::CreateObject(JDWP::RefTypeId class_id, JDWP::ObjectId* new_object_id) { |
| JDWP::JdwpError error; |
| mirror::Class* c = DecodeClass(class_id, &error); |
| if (c == nullptr) { |
| *new_object_id = 0; |
| return error; |
| } |
| Thread* self = Thread::Current(); |
| ObjPtr<mirror::Object> new_object; |
| if (c->IsStringClass()) { |
| // Special case for java.lang.String. |
| gc::AllocatorType allocator_type = Runtime::Current()->GetHeap()->GetCurrentAllocator(); |
| new_object = mirror::String::AllocEmptyString<true>(self, allocator_type); |
| } else { |
| new_object = c->AllocObject(self); |
| } |
| if (new_object == nullptr) { |
| DCHECK(self->IsExceptionPending()); |
| self->ClearException(); |
| LOG(ERROR) << "Could not allocate object of type " << mirror::Class::PrettyDescriptor(c); |
| *new_object_id = 0; |
| return JDWP::ERR_OUT_OF_MEMORY; |
| } |
| *new_object_id = gRegistry->Add(new_object.Ptr()); |
| return JDWP::ERR_NONE; |
| } |
| |
| /* |
| * Used by Eclipse's "Display" view to evaluate "new byte[5]" to get "(byte[]) [0, 0, 0, 0, 0]". |
| */ |
| JDWP::JdwpError Dbg::CreateArrayObject(JDWP::RefTypeId array_class_id, uint32_t length, |
| JDWP::ObjectId* new_array_id) { |
| JDWP::JdwpError error; |
| mirror::Class* c = DecodeClass(array_class_id, &error); |
| if (c == nullptr) { |
| *new_array_id = 0; |
| return error; |
| } |
| Thread* self = Thread::Current(); |
| gc::Heap* heap = Runtime::Current()->GetHeap(); |
| mirror::Array* new_array = mirror::Array::Alloc<true>(self, c, length, |
| c->GetComponentSizeShift(), |
| heap->GetCurrentAllocator()); |
| if (new_array == nullptr) { |
| DCHECK(self->IsExceptionPending()); |
| self->ClearException(); |
| LOG(ERROR) << "Could not allocate array of type " << mirror::Class::PrettyDescriptor(c); |
| *new_array_id = 0; |
| return JDWP::ERR_OUT_OF_MEMORY; |
| } |
| *new_array_id = gRegistry->Add(new_array); |
| return JDWP::ERR_NONE; |
| } |
| |
| JDWP::FieldId Dbg::ToFieldId(const ArtField* f) { |
| return static_cast<JDWP::FieldId>(reinterpret_cast<uintptr_t>(f)); |
| } |
| |
| static JDWP::MethodId ToMethodId(ArtMethod* m) |
| REQUIRES_SHARED(Locks::mutator_lock_) { |
| return static_cast<JDWP::MethodId>(reinterpret_cast<uintptr_t>(GetCanonicalMethod(m))); |
| } |
| |
| static ArtField* FromFieldId(JDWP::FieldId fid) |
| REQUIRES_SHARED(Locks::mutator_lock_) { |
| return reinterpret_cast<ArtField*>(static_cast<uintptr_t>(fid)); |
| } |
| |
| static ArtMethod* FromMethodId(JDWP::MethodId mid) |
| REQUIRES_SHARED(Locks::mutator_lock_) { |
| return reinterpret_cast<ArtMethod*>(static_cast<uintptr_t>(mid)); |
| } |
| |
| bool Dbg::MatchThread(JDWP::ObjectId expected_thread_id, Thread* event_thread) { |
| CHECK(event_thread != nullptr); |
| JDWP::JdwpError error; |
| mirror::Object* expected_thread_peer = gRegistry->Get<mirror::Object*>( |
| expected_thread_id, &error); |
| return expected_thread_peer == event_thread->GetPeerFromOtherThread(); |
| } |
| |
| bool Dbg::MatchLocation(const JDWP::JdwpLocation& expected_location, |
| const JDWP::EventLocation& event_location) { |
| if (expected_location.dex_pc != event_location.dex_pc) { |
| return false; |
| } |
| ArtMethod* m = FromMethodId(expected_location.method_id); |
| return m == event_location.method; |
| } |
| |
| bool Dbg::MatchType(ObjPtr<mirror::Class> event_class, JDWP::RefTypeId class_id) { |
| if (event_class == nullptr) { |
| return false; |
| } |
| JDWP::JdwpError error; |
| ObjPtr<mirror::Class> expected_class = DecodeClass(class_id, &error); |
| CHECK(expected_class != nullptr); |
| return expected_class->IsAssignableFrom(event_class); |
| } |
| |
| bool Dbg::MatchField(JDWP::RefTypeId expected_type_id, JDWP::FieldId expected_field_id, |
| ArtField* event_field) { |
| ArtField* expected_field = FromFieldId(expected_field_id); |
| if (expected_field != event_field) { |
| return false; |
| } |
| return Dbg::MatchType(event_field->GetDeclaringClass(), expected_type_id); |
| } |
| |
| bool Dbg::MatchInstance(JDWP::ObjectId expected_instance_id, mirror::Object* event_instance) { |
| JDWP::JdwpError error; |
| mirror::Object* modifier_instance = gRegistry->Get<mirror::Object*>(expected_instance_id, &error); |
| return modifier_instance == event_instance; |
| } |
| |
| void Dbg::SetJdwpLocation(JDWP::JdwpLocation* location, ArtMethod* m, uint32_t dex_pc) { |
| if (m == nullptr) { |
| memset(location, 0, sizeof(*location)); |
| } else { |
| mirror::Class* c = m->GetDeclaringClass(); |
| location->type_tag = GetTypeTag(c); |
| location->class_id = gRegistry->AddRefType(c); |
| location->method_id = ToMethodId(m); |
| location->dex_pc = (m->IsNative() || m->IsProxyMethod()) ? static_cast<uint64_t>(-1) : dex_pc; |
| } |
| } |
| |
| std::string Dbg::GetMethodName(JDWP::MethodId method_id) { |
| ArtMethod* m = FromMethodId(method_id); |
| if (m == nullptr) { |
| return "null"; |
| } |
| return m->GetInterfaceMethodIfProxy(kRuntimePointerSize)->GetName(); |
| } |
| |
| std::string Dbg::GetFieldName(JDWP::FieldId field_id) { |
| ArtField* f = FromFieldId(field_id); |
| if (f == nullptr) { |
| return "null"; |
| } |
| return f->GetName(); |
| } |
| |
| /* |
| * Augment the access flags for synthetic methods and fields by setting |
| * the (as described by the spec) "0xf0000000 bit". Also, strip out any |
| * flags not specified by the Java programming language. |
| */ |
| static uint32_t MangleAccessFlags(uint32_t accessFlags) { |
| accessFlags &= kAccJavaFlagsMask; |
| if ((accessFlags & kAccSynthetic) != 0) { |
| accessFlags |= 0xf0000000; |
| } |
| return accessFlags; |
| } |
| |
| /* |
| * Circularly shifts registers so that arguments come first. Debuggers |
| * expect slots to begin with arguments, but dex code places them at |
| * the end. |
| */ |
| static uint16_t MangleSlot(uint16_t slot, ArtMethod* m) |
| REQUIRES_SHARED(Locks::mutator_lock_) { |
| const DexFile::CodeItem* code_item = m->GetCodeItem(); |
| if (code_item == nullptr) { |
| // We should not get here for a method without code (native, proxy or abstract). Log it and |
| // return the slot as is since all registers are arguments. |
| LOG(WARNING) << "Trying to mangle slot for method without code " << m->PrettyMethod(); |
| return slot; |
| } |
| uint16_t ins_size = code_item->ins_size_; |
| uint16_t locals_size = code_item->registers_size_ - ins_size; |
| if (slot >= locals_size) { |
| return slot - locals_size; |
| } else { |
| return slot + ins_size; |
| } |
| } |
| |
| static size_t GetMethodNumArgRegistersIncludingThis(ArtMethod* method) |
| REQUIRES_SHARED(Locks::mutator_lock_) { |
| uint32_t num_registers = ArtMethod::NumArgRegisters(method->GetShorty()); |
| if (!method->IsStatic()) { |
| ++num_registers; |
| } |
| return num_registers; |
| } |
| |
| /* |
| * Circularly shifts registers so that arguments come last. Reverts |
| * slots to dex style argument placement. |
| */ |
| static uint16_t DemangleSlot(uint16_t slot, ArtMethod* m, JDWP::JdwpError* error) |
| REQUIRES_SHARED(Locks::mutator_lock_) { |
| const DexFile::CodeItem* code_item = m->GetCodeItem(); |
| if (code_item == nullptr) { |
| // We should not get here for a method without code (native, proxy or abstract). Log it and |
| // return the slot as is since all registers are arguments. |
| LOG(WARNING) << "Trying to demangle slot for method without code " |
| << m->PrettyMethod(); |
| uint16_t vreg_count = GetMethodNumArgRegistersIncludingThis(m); |
| if (slot < vreg_count) { |
| *error = JDWP::ERR_NONE; |
| return slot; |
| } |
| } else { |
| if (slot < code_item->registers_size_) { |
| uint16_t ins_size = code_item->ins_size_; |
| uint16_t locals_size = code_item->registers_size_ - ins_size; |
| *error = JDWP::ERR_NONE; |
| return (slot < ins_size) ? slot + locals_size : slot - ins_size; |
| } |
| } |
| |
| // Slot is invalid in the method. |
| LOG(ERROR) << "Invalid local slot " << slot << " for method " << m->PrettyMethod(); |
| *error = JDWP::ERR_INVALID_SLOT; |
| return DexFile::kDexNoIndex16; |
| } |
| |
| JDWP::JdwpError Dbg::OutputDeclaredFields(JDWP::RefTypeId class_id, bool with_generic, |
| JDWP::ExpandBuf* pReply) { |
| JDWP::JdwpError error; |
| mirror::Class* c = DecodeClass(class_id, &error); |
| if (c == nullptr) { |
| return error; |
| } |
| |
| size_t instance_field_count = c->NumInstanceFields(); |
| size_t static_field_count = c->NumStaticFields(); |
| |
| expandBufAdd4BE(pReply, instance_field_count + static_field_count); |
| |
| for (size_t i = 0; i < instance_field_count + static_field_count; ++i) { |
| ArtField* f = (i < instance_field_count) ? c->GetInstanceField(i) : |
| c->GetStaticField(i - instance_field_count); |
| expandBufAddFieldId(pReply, ToFieldId(f)); |
| expandBufAddUtf8String(pReply, f->GetName()); |
| expandBufAddUtf8String(pReply, f->GetTypeDescriptor()); |
| if (with_generic) { |
| static const char genericSignature[1] = ""; |
| expandBufAddUtf8String(pReply, genericSignature); |
| } |
| expandBufAdd4BE(pReply, MangleAccessFlags(f->GetAccessFlags())); |
| } |
| return JDWP::ERR_NONE; |
| } |
| |
| JDWP::JdwpError Dbg::OutputDeclaredMethods(JDWP::RefTypeId class_id, bool with_generic, |
| JDWP::ExpandBuf* pReply) { |
| JDWP::JdwpError error; |
| mirror::Class* c = DecodeClass(class_id, &error); |
| if (c == nullptr) { |
| return error; |
| } |
| |
| expandBufAdd4BE(pReply, c->NumMethods()); |
| |
| auto* cl = Runtime::Current()->GetClassLinker(); |
| auto ptr_size = cl->GetImagePointerSize(); |
| for (ArtMethod& m : c->GetMethods(ptr_size)) { |
| expandBufAddMethodId(pReply, ToMethodId(&m)); |
| expandBufAddUtf8String(pReply, m.GetInterfaceMethodIfProxy(kRuntimePointerSize)->GetName()); |
| expandBufAddUtf8String( |
| pReply, m.GetInterfaceMethodIfProxy(kRuntimePointerSize)->GetSignature().ToString()); |
| if (with_generic) { |
| const char* generic_signature = ""; |
| expandBufAddUtf8String(pReply, generic_signature); |
| } |
| expandBufAdd4BE(pReply, MangleAccessFlags(m.GetAccessFlags())); |
| } |
| return JDWP::ERR_NONE; |
| } |
| |
| JDWP::JdwpError Dbg::OutputDeclaredInterfaces(JDWP::RefTypeId class_id, JDWP::ExpandBuf* pReply) { |
| JDWP::JdwpError error; |
| Thread* self = Thread::Current(); |
| ObjPtr<mirror::Class> c = DecodeClass(class_id, &error); |
| if (c == nullptr) { |
| return error; |
| } |
| size_t interface_count = c->NumDirectInterfaces(); |
| expandBufAdd4BE(pReply, interface_count); |
| for (size_t i = 0; i < interface_count; ++i) { |
| ObjPtr<mirror::Class> interface = mirror::Class::GetDirectInterface(self, c, i); |
| DCHECK(interface != nullptr); |
| expandBufAddRefTypeId(pReply, gRegistry->AddRefType(interface)); |
| } |
| return JDWP::ERR_NONE; |
| } |
| |
| void Dbg::OutputLineTable(JDWP::RefTypeId, JDWP::MethodId method_id, JDWP::ExpandBuf* pReply) { |
| struct DebugCallbackContext { |
| int numItems; |
| JDWP::ExpandBuf* pReply; |
| |
| static bool Callback(void* context, const DexFile::PositionInfo& entry) { |
| DebugCallbackContext* pContext = reinterpret_cast<DebugCallbackContext*>(context); |
| expandBufAdd8BE(pContext->pReply, entry.address_); |
| expandBufAdd4BE(pContext->pReply, entry.line_); |
| pContext->numItems++; |
| return false; |
| } |
| }; |
| ArtMethod* m = FromMethodId(method_id); |
| const DexFile::CodeItem* code_item = m->GetCodeItem(); |
| uint64_t start, end; |
| if (code_item == nullptr) { |
| DCHECK(m->IsNative() || m->IsProxyMethod()); |
| start = -1; |
| end = -1; |
| } else { |
| start = 0; |
| // Return the index of the last instruction |
| end = code_item->insns_size_in_code_units_ - 1; |
| } |
| |
| expandBufAdd8BE(pReply, start); |
| expandBufAdd8BE(pReply, end); |
| |
| // Add numLines later |
| size_t numLinesOffset = expandBufGetLength(pReply); |
| expandBufAdd4BE(pReply, 0); |
| |
| DebugCallbackContext context; |
| context.numItems = 0; |
| context.pReply = pReply; |
| |
| if (code_item != nullptr) { |
| m->GetDexFile()->DecodeDebugPositionInfo(code_item, DebugCallbackContext::Callback, &context); |
| } |
| |
| JDWP::Set4BE(expandBufGetBuffer(pReply) + numLinesOffset, context.numItems); |
| } |
| |
| void Dbg::OutputVariableTable(JDWP::RefTypeId, JDWP::MethodId method_id, bool with_generic, |
| JDWP::ExpandBuf* pReply) { |
| struct DebugCallbackContext { |
| ArtMethod* method; |
| JDWP::ExpandBuf* pReply; |
| size_t variable_count; |
| bool with_generic; |
| |
| static void Callback(void* context, const DexFile::LocalInfo& entry) |
| REQUIRES_SHARED(Locks::mutator_lock_) { |
| DebugCallbackContext* pContext = reinterpret_cast<DebugCallbackContext*>(context); |
| |
| uint16_t slot = entry.reg_; |
| VLOG(jdwp) << StringPrintf(" %2zd: %d(%d) '%s' '%s' '%s' actual slot=%d mangled slot=%d", |
| pContext->variable_count, entry.start_address_, |
| entry.end_address_ - entry.start_address_, |
| entry.name_, entry.descriptor_, entry.signature_, slot, |
| MangleSlot(slot, pContext->method)); |
| |
| slot = MangleSlot(slot, pContext->method); |
| |
| expandBufAdd8BE(pContext->pReply, entry.start_address_); |
| expandBufAddUtf8String(pContext->pReply, entry.name_); |
| expandBufAddUtf8String(pContext->pReply, entry.descriptor_); |
| if (pContext->with_generic) { |
| expandBufAddUtf8String(pContext->pReply, entry.signature_); |
| } |
| expandBufAdd4BE(pContext->pReply, entry.end_address_- entry.start_address_); |
| expandBufAdd4BE(pContext->pReply, slot); |
| |
| ++pContext->variable_count; |
| } |
| }; |
| ArtMethod* m = FromMethodId(method_id); |
| |
| // arg_count considers doubles and longs to take 2 units. |
| // variable_count considers everything to take 1 unit. |
| expandBufAdd4BE(pReply, GetMethodNumArgRegistersIncludingThis(m)); |
| |
| // We don't know the total number of variables yet, so leave a blank and update it later. |
| size_t variable_count_offset = expandBufGetLength(pReply); |
| expandBufAdd4BE(pReply, 0); |
| |
| DebugCallbackContext context; |
| context.method = m; |
| context.pReply = pReply; |
| context.variable_count = 0; |
| context.with_generic = with_generic; |
| |
| const DexFile::CodeItem* code_item = m->GetCodeItem(); |
| if (code_item != nullptr) { |
| m->GetDexFile()->DecodeDebugLocalInfo( |
| code_item, m->IsStatic(), m->GetDexMethodIndex(), DebugCallbackContext::Callback, |
| &context); |
| } |
| |
| JDWP::Set4BE(expandBufGetBuffer(pReply) + variable_count_offset, context.variable_count); |
| } |
| |
| void Dbg::OutputMethodReturnValue(JDWP::MethodId method_id, const JValue* return_value, |
| JDWP::ExpandBuf* pReply) { |
| ArtMethod* m = FromMethodId(method_id); |
| JDWP::JdwpTag tag = BasicTagFromDescriptor(m->GetShorty()); |
| OutputJValue(tag, return_value, pReply); |
| } |
| |
| void Dbg::OutputFieldValue(JDWP::FieldId field_id, const JValue* field_value, |
| JDWP::ExpandBuf* pReply) { |
| ArtField* f = FromFieldId(field_id); |
| JDWP::JdwpTag tag = BasicTagFromDescriptor(f->GetTypeDescriptor()); |
| OutputJValue(tag, field_value, pReply); |
| } |
| |
| JDWP::JdwpError Dbg::GetBytecodes(JDWP::RefTypeId, JDWP::MethodId method_id, |
| std::vector<uint8_t>* bytecodes) { |
| ArtMethod* m = FromMethodId(method_id); |
| if (m == nullptr) { |
| return JDWP::ERR_INVALID_METHODID; |
| } |
| const DexFile::CodeItem* code_item = m->GetCodeItem(); |
| size_t byte_count = code_item->insns_size_in_code_units_ * 2; |
| const uint8_t* begin = reinterpret_cast<const uint8_t*>(code_item->insns_); |
| const uint8_t* end = begin + byte_count; |
| for (const uint8_t* p = begin; p != end; ++p) { |
| bytecodes->push_back(*p); |
| } |
| return JDWP::ERR_NONE; |
| } |
| |
| JDWP::JdwpTag Dbg::GetFieldBasicTag(JDWP::FieldId field_id) { |
| return BasicTagFromDescriptor(FromFieldId(field_id)->GetTypeDescriptor()); |
| } |
| |
| JDWP::JdwpTag Dbg::GetStaticFieldBasicTag(JDWP::FieldId field_id) { |
| return BasicTagFromDescriptor(FromFieldId(field_id)->GetTypeDescriptor()); |
| } |
| |
| static JValue GetArtFieldValue(ArtField* f, mirror::Object* o) |
| REQUIRES_SHARED(Locks::mutator_lock_) { |
| Primitive::Type fieldType = f->GetTypeAsPrimitiveType(); |
| JValue field_value; |
| switch (fieldType) { |
| case Primitive::kPrimBoolean: |
| field_value.SetZ(f->GetBoolean(o)); |
| return field_value; |
| |
| case Primitive::kPrimByte: |
| field_value.SetB(f->GetByte(o)); |
| return field_value; |
| |
| case Primitive::kPrimChar: |
| field_value.SetC(f->GetChar(o)); |
| return field_value; |
| |
| case Primitive::kPrimShort: |
| field_value.SetS(f->GetShort(o)); |
| return field_value; |
| |
| case Primitive::kPrimInt: |
| case Primitive::kPrimFloat: |
| // Int and Float must be treated as 32-bit values in JDWP. |
| field_value.SetI(f->GetInt(o)); |
| return field_value; |
| |
| case Primitive::kPrimLong: |
| case Primitive::kPrimDouble: |
| // Long and Double must be treated as 64-bit values in JDWP. |
| field_value.SetJ(f->GetLong(o)); |
| return field_value; |
| |
| case Primitive::kPrimNot: |
| field_value.SetL(f->GetObject(o).Ptr()); |
| return field_value; |
| |
| case Primitive::kPrimVoid: |
| LOG(FATAL) << "Attempt to read from field of type 'void'"; |
| UNREACHABLE(); |
| } |
| LOG(FATAL) << "Attempt to read from field of unknown type"; |
| UNREACHABLE(); |
| } |
| |
| static JDWP::JdwpError GetFieldValueImpl(JDWP::RefTypeId ref_type_id, JDWP::ObjectId object_id, |
| JDWP::FieldId field_id, JDWP::ExpandBuf* pReply, |
| bool is_static) |
| REQUIRES_SHARED(Locks::mutator_lock_) { |
| JDWP::JdwpError error; |
| mirror::Class* c = DecodeClass(ref_type_id, &error); |
| if (ref_type_id != 0 && c == nullptr) { |
| return error; |
| } |
| |
| Thread* self = Thread::Current(); |
| StackHandleScope<2> hs(self); |
| MutableHandle<mirror::Object> |
| o(hs.NewHandle(Dbg::GetObjectRegistry()->Get<mirror::Object*>(object_id, &error))); |
| if ((!is_static && o == nullptr) || error != JDWP::ERR_NONE) { |
| return JDWP::ERR_INVALID_OBJECT; |
| } |
| ArtField* f = FromFieldId(field_id); |
| |
| mirror::Class* receiver_class = c; |
| if (receiver_class == nullptr && o != nullptr) { |
| receiver_class = o->GetClass(); |
| } |
| |
| // TODO: should we give up now if receiver_class is null? |
| if (receiver_class != nullptr && !f->GetDeclaringClass()->IsAssignableFrom(receiver_class)) { |
| LOG(INFO) << "ERR_INVALID_FIELDID: " << f->PrettyField() << " " |
| << receiver_class->PrettyClass(); |
| return JDWP::ERR_INVALID_FIELDID; |
| } |
| |
| // Ensure the field's class is initialized. |
| Handle<mirror::Class> klass(hs.NewHandle(f->GetDeclaringClass())); |
| if (!Runtime::Current()->GetClassLinker()->EnsureInitialized(self, klass, true, false)) { |
| LOG(WARNING) << "Not able to initialize class for SetValues: " |
| << mirror::Class::PrettyClass(klass.Get()); |
| } |
| |
| // The RI only enforces the static/non-static mismatch in one direction. |
| // TODO: should we change the tests and check both? |
| if (is_static) { |
| if (!f->IsStatic()) { |
| return JDWP::ERR_INVALID_FIELDID; |
| } |
| } else { |
| if (f->IsStatic()) { |
| LOG(WARNING) << "Ignoring non-nullptr receiver for ObjectReference.GetValues" |
| << " on static field " << f->PrettyField(); |
| } |
| } |
| if (f->IsStatic()) { |
| o.Assign(f->GetDeclaringClass()); |
| } |
| |
| JValue field_value(GetArtFieldValue(f, o.Get())); |
| JDWP::JdwpTag tag = BasicTagFromDescriptor(f->GetTypeDescriptor()); |
| Dbg::OutputJValue(tag, &field_value, pReply); |
| return JDWP::ERR_NONE; |
| } |
| |
| JDWP::JdwpError Dbg::GetFieldValue(JDWP::ObjectId object_id, JDWP::FieldId field_id, |
| JDWP::ExpandBuf* pReply) { |
| return GetFieldValueImpl(0, object_id, field_id, pReply, false); |
| } |
| |
| JDWP::JdwpError Dbg::GetStaticFieldValue(JDWP::RefTypeId ref_type_id, JDWP::FieldId field_id, |
| JDWP::ExpandBuf* pReply) { |
| return GetFieldValueImpl(ref_type_id, 0, field_id, pReply, true); |
| } |
| |
| static JDWP::JdwpError SetArtFieldValue(ArtField* f, mirror::Object* o, uint64_t value, int width) |
| REQUIRES_SHARED(Locks::mutator_lock_) { |
| Primitive::Type fieldType = f->GetTypeAsPrimitiveType(); |
| // Debugging only happens at runtime so we know we are not running in a transaction. |
| static constexpr bool kNoTransactionMode = false; |
| switch (fieldType) { |
| case Primitive::kPrimBoolean: |
| CHECK_EQ(width, 1); |
| f->SetBoolean<kNoTransactionMode>(o, static_cast<uint8_t>(value)); |
| return JDWP::ERR_NONE; |
| |
| case Primitive::kPrimByte: |
| CHECK_EQ(width, 1); |
| f->SetByte<kNoTransactionMode>(o, static_cast<uint8_t>(value)); |
| return JDWP::ERR_NONE; |
| |
| case Primitive::kPrimChar: |
| CHECK_EQ(width, 2); |
| f->SetChar<kNoTransactionMode>(o, static_cast<uint16_t>(value)); |
| return JDWP::ERR_NONE; |
| |
| case Primitive::kPrimShort: |
| CHECK_EQ(width, 2); |
| f->SetShort<kNoTransactionMode>(o, static_cast<int16_t>(value)); |
| return JDWP::ERR_NONE; |
| |
| case Primitive::kPrimInt: |
| case Primitive::kPrimFloat: |
| CHECK_EQ(width, 4); |
| // Int and Float must be treated as 32-bit values in JDWP. |
| f->SetInt<kNoTransactionMode>(o, static_cast<int32_t>(value)); |
| return JDWP::ERR_NONE; |
| |
| case Primitive::kPrimLong: |
| case Primitive::kPrimDouble: |
| CHECK_EQ(width, 8); |
| // Long and Double must be treated as 64-bit values in JDWP. |
| f->SetLong<kNoTransactionMode>(o, value); |
| return JDWP::ERR_NONE; |
| |
| case Primitive::kPrimNot: { |
| JDWP::JdwpError error; |
| mirror::Object* v = Dbg::GetObjectRegistry()->Get<mirror::Object*>(value, &error); |
| if (error != JDWP::ERR_NONE) { |
| return JDWP::ERR_INVALID_OBJECT; |
| } |
| if (v != nullptr) { |
| ObjPtr<mirror::Class> field_type; |
| { |
| StackHandleScope<2> hs(Thread::Current()); |
| HandleWrapper<mirror::Object> h_v(hs.NewHandleWrapper(&v)); |
| HandleWrapper<mirror::Object> h_o(hs.NewHandleWrapper(&o)); |
| field_type = f->GetType<true>(); |
| } |
| if (!field_type->IsAssignableFrom(v->GetClass())) { |
| return JDWP::ERR_INVALID_OBJECT; |
| } |
| } |
| f->SetObject<kNoTransactionMode>(o, v); |
| return JDWP::ERR_NONE; |
| } |
| |
| case Primitive::kPrimVoid: |
| LOG(FATAL) << "Attempt to write to field of type 'void'"; |
| UNREACHABLE(); |
| } |
| LOG(FATAL) << "Attempt to write to field of unknown type"; |
| UNREACHABLE(); |
| } |
| |
| static JDWP::JdwpError SetFieldValueImpl(JDWP::ObjectId object_id, JDWP::FieldId field_id, |
| uint64_t value, int width, bool is_static) |
| REQUIRES_SHARED(Locks::mutator_lock_) { |
| JDWP::JdwpError error; |
| Thread* self = Thread::Current(); |
| StackHandleScope<2> hs(self); |
| MutableHandle<mirror::Object> |
| o(hs.NewHandle(Dbg::GetObjectRegistry()->Get<mirror::Object*>(object_id, &error))); |
| if ((!is_static && o == nullptr) || error != JDWP::ERR_NONE) { |
| return JDWP::ERR_INVALID_OBJECT; |
| } |
| ArtField* f = FromFieldId(field_id); |
| |
| // Ensure the field's class is initialized. |
| Handle<mirror::Class> klass(hs.NewHandle(f->GetDeclaringClass())); |
| if (!Runtime::Current()->GetClassLinker()->EnsureInitialized(self, klass, true, false)) { |
| LOG(WARNING) << "Not able to initialize class for SetValues: " |
| << mirror::Class::PrettyClass(klass.Get()); |
| } |
| |
| // The RI only enforces the static/non-static mismatch in one direction. |
| // TODO: should we change the tests and check both? |
| if (is_static) { |
| if (!f->IsStatic()) { |
| return JDWP::ERR_INVALID_FIELDID; |
| } |
| } else { |
| if (f->IsStatic()) { |
| LOG(WARNING) << "Ignoring non-nullptr receiver for ObjectReference.SetValues" |
| << " on static field " << f->PrettyField(); |
| } |
| } |
| if (f->IsStatic()) { |
| o.Assign(f->GetDeclaringClass()); |
| } |
| return SetArtFieldValue(f, o.Get(), value, width); |
| } |
| |
| JDWP::JdwpError Dbg::SetFieldValue(JDWP::ObjectId object_id, JDWP::FieldId field_id, uint64_t value, |
| int width) { |
| return SetFieldValueImpl(object_id, field_id, value, width, false); |
| } |
| |
| JDWP::JdwpError Dbg::SetStaticFieldValue(JDWP::FieldId field_id, uint64_t value, int width) { |
| return SetFieldValueImpl(0, field_id, value, width, true); |
| } |
| |
| JDWP::JdwpError Dbg::StringToUtf8(JDWP::ObjectId string_id, std::string* str) { |
| JDWP::JdwpError error; |
| mirror::Object* obj = gRegistry->Get<mirror::Object*>(string_id, &error); |
| if (error != JDWP::ERR_NONE) { |
| return error; |
| } |
| if (obj == nullptr) { |
| return JDWP::ERR_INVALID_OBJECT; |
| } |
| { |
| ScopedObjectAccessUnchecked soa(Thread::Current()); |
| ObjPtr<mirror::Class> java_lang_String = |
| soa.Decode<mirror::Class>(WellKnownClasses::java_lang_String); |
| if (!java_lang_String->IsAssignableFrom(obj->GetClass())) { |
| // This isn't a string. |
| return JDWP::ERR_INVALID_STRING; |
| } |
| } |
| *str = obj->AsString()->ToModifiedUtf8(); |
| return JDWP::ERR_NONE; |
| } |
| |
| void Dbg::OutputJValue(JDWP::JdwpTag tag, const JValue* return_value, JDWP::ExpandBuf* pReply) { |
| if (IsPrimitiveTag(tag)) { |
| expandBufAdd1(pReply, tag); |
| if (tag == JDWP::JT_BOOLEAN || tag == JDWP::JT_BYTE) { |
| expandBufAdd1(pReply, return_value->GetI()); |
| } else if (tag == JDWP::JT_CHAR || tag == JDWP::JT_SHORT) { |
| expandBufAdd2BE(pReply, return_value->GetI()); |
| } else if (tag == JDWP::JT_FLOAT || tag == JDWP::JT_INT) { |
| expandBufAdd4BE(pReply, return_value->GetI()); |
| } else if (tag == JDWP::JT_DOUBLE || tag == JDWP::JT_LONG) { |
| expandBufAdd8BE(pReply, return_value->GetJ()); |
| } else { |
| CHECK_EQ(tag, JDWP::JT_VOID); |
| } |
| } else { |
| ScopedObjectAccessUnchecked soa(Thread::Current()); |
| mirror::Object* value = return_value->GetL(); |
| expandBufAdd1(pReply, TagFromObject(soa, value)); |
| expandBufAddObjectId(pReply, gRegistry->Add(value)); |
| } |
| } |
| |
| JDWP::JdwpError Dbg::GetThreadName(JDWP::ObjectId thread_id, std::string* name) { |
| ScopedObjectAccessUnchecked soa(Thread::Current()); |
| JDWP::JdwpError error; |
| DecodeThread(soa, thread_id, &error); |
| if (error != JDWP::ERR_NONE && error != JDWP::ERR_THREAD_NOT_ALIVE) { |
| return error; |
| } |
| |
| // We still need to report the zombie threads' names, so we can't just call Thread::GetThreadName. |
| mirror::Object* thread_object = gRegistry->Get<mirror::Object*>(thread_id, &error); |
| CHECK(thread_object != nullptr) << error; |
| ArtField* java_lang_Thread_name_field = |
| jni::DecodeArtField(WellKnownClasses::java_lang_Thread_name); |
| ObjPtr<mirror::String> s(java_lang_Thread_name_field->GetObject(thread_object)->AsString()); |
| if (s != nullptr) { |
| *name = s->ToModifiedUtf8(); |
| } |
| return JDWP::ERR_NONE; |
| } |
| |
| JDWP::JdwpError Dbg::GetThreadGroup(JDWP::ObjectId thread_id, JDWP::ExpandBuf* pReply) { |
| ScopedObjectAccessUnchecked soa(Thread::Current()); |
| JDWP::JdwpError error; |
| mirror::Object* thread_object = gRegistry->Get<mirror::Object*>(thread_id, &error); |
| if (error != JDWP::ERR_NONE) { |
| return JDWP::ERR_INVALID_OBJECT; |
| } |
| ScopedAssertNoThreadSuspension ants("Debugger: GetThreadGroup"); |
| // Okay, so it's an object, but is it actually a thread? |
| DecodeThread(soa, thread_id, &error); |
| if (error == JDWP::ERR_THREAD_NOT_ALIVE) { |
| // Zombie threads are in the null group. |
| expandBufAddObjectId(pReply, JDWP::ObjectId(0)); |
| error = JDWP::ERR_NONE; |
| } else if (error == JDWP::ERR_NONE) { |
| ObjPtr<mirror::Class> c = soa.Decode<mirror::Class>(WellKnownClasses::java_lang_Thread); |
| CHECK(c != nullptr); |
| ArtField* f = jni::DecodeArtField(WellKnownClasses::java_lang_Thread_group); |
| CHECK(f != nullptr); |
| ObjPtr<mirror::Object> group = f->GetObject(thread_object); |
| CHECK(group != nullptr); |
| JDWP::ObjectId thread_group_id = gRegistry->Add(group); |
| expandBufAddObjectId(pReply, thread_group_id); |
| } |
| return error; |
| } |
| |
| static mirror::Object* DecodeThreadGroup(ScopedObjectAccessUnchecked& soa, |
| JDWP::ObjectId thread_group_id, JDWP::JdwpError* error) |
| REQUIRES_SHARED(Locks::mutator_lock_) { |
| mirror::Object* thread_group = Dbg::GetObjectRegistry()->Get<mirror::Object*>(thread_group_id, |
| error); |
| if (*error != JDWP::ERR_NONE) { |
| return nullptr; |
| } |
| if (thread_group == nullptr) { |
| *error = JDWP::ERR_INVALID_OBJECT; |
| return nullptr; |
| } |
| ObjPtr<mirror::Class> c = |
| soa.Decode<mirror::Class>(WellKnownClasses::java_lang_ThreadGroup); |
| CHECK(c != nullptr); |
| if (!c->IsAssignableFrom(thread_group->GetClass())) { |
| // This is not a java.lang.ThreadGroup. |
| *error = JDWP::ERR_INVALID_THREAD_GROUP; |
| return nullptr; |
| } |
| *error = JDWP::ERR_NONE; |
| return thread_group; |
| } |
| |
| JDWP::JdwpError Dbg::GetThreadGroupName(JDWP::ObjectId thread_group_id, JDWP::ExpandBuf* pReply) { |
| ScopedObjectAccessUnchecked soa(Thread::Current()); |
| JDWP::JdwpError error; |
| mirror::Object* thread_group = DecodeThreadGroup(soa, thread_group_id, &error); |
| if (error != JDWP::ERR_NONE) { |
| return error; |
| } |
| ScopedAssertNoThreadSuspension ants("Debugger: GetThreadGroupName"); |
| ArtField* f = jni::DecodeArtField(WellKnownClasses::java_lang_ThreadGroup_name); |
| CHECK(f != nullptr); |
| ObjPtr<mirror::String> s = f->GetObject(thread_group)->AsString(); |
| |
| std::string thread_group_name(s->ToModifiedUtf8()); |
| expandBufAddUtf8String(pReply, thread_group_name); |
| return JDWP::ERR_NONE; |
| } |
| |
| JDWP::JdwpError Dbg::GetThreadGroupParent(JDWP::ObjectId thread_group_id, JDWP::ExpandBuf* pReply) { |
| ScopedObjectAccessUnchecked soa(Thread::Current()); |
| JDWP::JdwpError error; |
| mirror::Object* thread_group = DecodeThreadGroup(soa, thread_group_id, &error); |
| if (error != JDWP::ERR_NONE) { |
| return error; |
| } |
| ObjPtr<mirror::Object> parent; |
| { |
| ScopedAssertNoThreadSuspension ants("Debugger: GetThreadGroupParent"); |
| ArtField* f = jni::DecodeArtField(WellKnownClasses::java_lang_ThreadGroup_parent); |
| CHECK(f != nullptr); |
| parent = f->GetObject(thread_group); |
| } |
| JDWP::ObjectId parent_group_id = gRegistry->Add(parent); |
| expandBufAddObjectId(pReply, parent_group_id); |
| return JDWP::ERR_NONE; |
| } |
| |
| static void GetChildThreadGroups(mirror::Object* thread_group, |
| std::vector<JDWP::ObjectId>* child_thread_group_ids) |
| REQUIRES_SHARED(Locks::mutator_lock_) { |
| CHECK(thread_group != nullptr); |
| |
| // Get the int "ngroups" count of this thread group... |
| ArtField* ngroups_field = jni::DecodeArtField(WellKnownClasses::java_lang_ThreadGroup_ngroups); |
| CHECK(ngroups_field != nullptr); |
| const int32_t size = ngroups_field->GetInt(thread_group); |
| if (size == 0) { |
| return; |
| } |
| |
| // Get the ThreadGroup[] "groups" out of this thread group... |
| ArtField* groups_field = jni::DecodeArtField(WellKnownClasses::java_lang_ThreadGroup_groups); |
| ObjPtr<mirror::Object> groups_array = groups_field->GetObject(thread_group); |
| |
| CHECK(groups_array != nullptr); |
| CHECK(groups_array->IsObjectArray()); |
| |
| ObjPtr<mirror::ObjectArray<mirror::Object>> groups_array_as_array = |
| groups_array->AsObjectArray<mirror::Object>(); |
| |
| // Copy the first 'size' elements out of the array into the result. |
| ObjectRegistry* registry = Dbg::GetObjectRegistry(); |
| for (int32_t i = 0; i < size; ++i) { |
| child_thread_group_ids->push_back(registry->Add(groups_array_as_array->Get(i))); |
| } |
| } |
| |
| JDWP::JdwpError Dbg::GetThreadGroupChildren(JDWP::ObjectId thread_group_id, |
| JDWP::ExpandBuf* pReply) { |
| ScopedObjectAccessUnchecked soa(Thread::Current()); |
| JDWP::JdwpError error; |
| mirror::Object* thread_group = DecodeThreadGroup(soa, thread_group_id, &error); |
| if (error != JDWP::ERR_NONE) { |
| return error; |
| } |
| |
| // Add child threads. |
| { |
| std::vector<JDWP::ObjectId> child_thread_ids; |
| GetThreads(thread_group, &child_thread_ids); |
| expandBufAdd4BE(pReply, child_thread_ids.size()); |
| for (JDWP::ObjectId child_thread_id : child_thread_ids) { |
| expandBufAddObjectId(pReply, child_thread_id); |
| } |
| } |
| |
| // Add child thread groups. |
| { |
| std::vector<JDWP::ObjectId> child_thread_groups_ids; |
| GetChildThreadGroups(thread_group, &child_thread_groups_ids); |
| expandBufAdd4BE(pReply, child_thread_groups_ids.size()); |
| for (JDWP::ObjectId child_thread_group_id : child_thread_groups_ids) { |
| expandBufAddObjectId(pReply, child_thread_group_id); |
| } |
| } |
| |
| return JDWP::ERR_NONE; |
| } |
| |
| JDWP::ObjectId Dbg::GetSystemThreadGroupId() { |
| ScopedObjectAccessUnchecked soa(Thread::Current()); |
| ArtField* f = jni::DecodeArtField(WellKnownClasses::java_lang_ThreadGroup_systemThreadGroup); |
| ObjPtr<mirror::Object> group = f->GetObject(f->GetDeclaringClass()); |
| return gRegistry->Add(group); |
| } |
| |
| JDWP::JdwpThreadStatus Dbg::ToJdwpThreadStatus(ThreadState state) { |
| switch (state) { |
| case kBlocked: |
| return JDWP::TS_MONITOR; |
| case kNative: |
| case kRunnable: |
| case kSuspended: |
| return JDWP::TS_RUNNING; |
| case kSleeping: |
| return JDWP::TS_SLEEPING; |
| case kStarting: |
| case kTerminated: |
| return JDWP::TS_ZOMBIE; |
| case kTimedWaiting: |
| case kWaitingForCheckPointsToRun: |
| case kWaitingForDebuggerSend: |
| case kWaitingForDebuggerSuspension: |
| case kWaitingForDebuggerToAttach: |
| case kWaitingForDeoptimization: |
| case kWaitingForGcToComplete: |
| case kWaitingForGetObjectsAllocated: |
| case kWaitingForJniOnLoad: |
| case kWaitingForMethodTracingStart: |
| case kWaitingForSignalCatcherOutput: |
| case kWaitingForVisitObjects: |
| case kWaitingInMainDebuggerLoop: |
| case kWaitingInMainSignalCatcherLoop: |
| case kWaitingPerformingGc: |
| case kWaitingWeakGcRootRead: |
| case kWaitingForGcThreadFlip: |
| case kWaiting: |
| return JDWP::TS_WAIT; |
| // Don't add a 'default' here so the compiler can spot incompatible enum changes. |
| } |
| LOG(FATAL) << "Unknown thread state: " << state; |
| return JDWP::TS_ZOMBIE; |
| } |
| |
| JDWP::JdwpError Dbg::GetThreadStatus(JDWP::ObjectId thread_id, JDWP::JdwpThreadStatus* pThreadStatus, |
| JDWP::JdwpSuspendStatus* pSuspendStatus) { |
| ScopedObjectAccess soa(Thread::Current()); |
| |
| *pSuspendStatus = JDWP::SUSPEND_STATUS_NOT_SUSPENDED; |
| |
| JDWP::JdwpError error; |
| Thread* thread = DecodeThread(soa, thread_id, &error); |
| if (error != JDWP::ERR_NONE) { |
| if (error == JDWP::ERR_THREAD_NOT_ALIVE) { |
| *pThreadStatus = JDWP::TS_ZOMBIE; |
| return JDWP::ERR_NONE; |
| } |
| return error; |
| } |
| |
| if (IsSuspendedForDebugger(soa, thread)) { |
| *pSuspendStatus = JDWP::SUSPEND_STATUS_SUSPENDED; |
| } |
| |
| *pThreadStatus = ToJdwpThreadStatus(thread->GetState()); |
| return JDWP::ERR_NONE; |
| } |
| |
| JDWP::JdwpError Dbg::GetThreadDebugSuspendCount(JDWP::ObjectId thread_id, JDWP::ExpandBuf* pReply) { |
| ScopedObjectAccess soa(Thread::Current()); |
| JDWP::JdwpError error; |
| Thread* thread = DecodeThread(soa, thread_id, &error); |
| if (error != JDWP::ERR_NONE) { |
| return error; |
| } |
| MutexLock mu2(soa.Self(), *Locks::thread_suspend_count_lock_); |
| expandBufAdd4BE(pReply, thread->GetDebugSuspendCount()); |
| return JDWP::ERR_NONE; |
| } |
| |
| JDWP::JdwpError Dbg::Interrupt(JDWP::ObjectId thread_id) { |
| ScopedObjectAccess soa(Thread::Current()); |
| JDWP::JdwpError error; |
| Thread* thread = DecodeThread(soa, thread_id, &error); |
| if (error != JDWP::ERR_NONE) { |
| return error; |
| } |
| thread->Interrupt(soa.Self()); |
| return JDWP::ERR_NONE; |
| } |
| |
| static bool IsInDesiredThreadGroup(mirror::Object* desired_thread_group, mirror::Object* peer) |
| REQUIRES_SHARED(Locks::mutator_lock_) { |
| // Do we want threads from all thread groups? |
| if (desired_thread_group == nullptr) { |
| return true; |
| } |
| ArtField* thread_group_field = jni::DecodeArtField(WellKnownClasses::java_lang_Thread_group); |
| DCHECK(thread_group_field != nullptr); |
| ObjPtr<mirror::Object> group = thread_group_field->GetObject(peer); |
| return (group == desired_thread_group); |
| } |
| |
| void Dbg::GetThreads(mirror::Object* thread_group, std::vector<JDWP::ObjectId>* thread_ids) { |
| ScopedObjectAccessUnchecked soa(Thread::Current()); |
| std::list<Thread*> all_threads_list; |
| { |
| MutexLock mu(Thread::Current(), *Locks::thread_list_lock_); |
| all_threads_list = Runtime::Current()->GetThreadList()->GetList(); |
| } |
| for (Thread* t : all_threads_list) { |
| if (t == Dbg::GetDebugThread()) { |
| // Skip the JDWP thread. Some debuggers get bent out of shape when they can't suspend and |
| // query all threads, so it's easier if we just don't tell them about this thread. |
| continue; |
| } |
| if (t->IsStillStarting()) { |
| // This thread is being started (and has been registered in the thread list). However, it is |
| // not completely started yet so we must ignore it. |
| continue; |
| } |
| mirror::Object* peer = t->GetPeerFromOtherThread(); |
| if (peer == nullptr) { |
| // peer might be null if the thread is still starting up. We can't tell the debugger about |
| // this thread yet. |
| // TODO: if we identified threads to the debugger by their Thread* |
| // rather than their peer's mirror::Object*, we could fix this. |
| // Doing so might help us report ZOMBIE threads too. |
| continue; |
| } |
| if (IsInDesiredThreadGroup(thread_group, peer)) { |
| thread_ids->push_back(gRegistry->Add(peer)); |
| } |
| } |
| } |
| |
| static int GetStackDepth(Thread* thread) REQUIRES_SHARED(Locks::mutator_lock_) { |
| struct CountStackDepthVisitor : public StackVisitor { |
| explicit CountStackDepthVisitor(Thread* thread_in) |
| : StackVisitor(thread_in, nullptr, StackVisitor::StackWalkKind::kIncludeInlinedFrames), |
| depth(0) {} |
| |
| // TODO: Enable annotalysis. We know lock is held in constructor, but abstraction confuses |
| // annotalysis. |
| bool VisitFrame() NO_THREAD_SAFETY_ANALYSIS { |
| if (!GetMethod()->IsRuntimeMethod()) { |
| ++depth; |
| } |
| return true; |
| } |
| size_t depth; |
| }; |
| |
| CountStackDepthVisitor visitor(thread); |
| visitor.WalkStack(); |
| return visitor.depth; |
| } |
| |
| JDWP::JdwpError Dbg::GetThreadFrameCount(JDWP::ObjectId thread_id, size_t* result) { |
| ScopedObjectAccess soa(Thread::Current()); |
| JDWP::JdwpError error; |
| *result = 0; |
| Thread* thread = DecodeThread(soa, thread_id, &error); |
| if (error != JDWP::ERR_NONE) { |
| return error; |
| } |
| if (!IsSuspendedForDebugger(soa, thread)) { |
| return JDWP::ERR_THREAD_NOT_SUSPENDED; |
| } |
| *result = GetStackDepth(thread); |
| return JDWP::ERR_NONE; |
| } |
| |
| JDWP::JdwpError Dbg::GetThreadFrames(JDWP::ObjectId thread_id, size_t start_frame, |
| size_t frame_count, JDWP::ExpandBuf* buf) { |
| class GetFrameVisitor : public StackVisitor { |
| public: |
| GetFrameVisitor(Thread* thread, size_t start_frame_in, size_t frame_count_in, |
| JDWP::ExpandBuf* buf_in) |
| REQUIRES_SHARED(Locks::mutator_lock_) |
| : StackVisitor(thread, nullptr, StackVisitor::StackWalkKind::kIncludeInlinedFrames), |
| depth_(0), |
| start_frame_(start_frame_in), |
| frame_count_(frame_count_in), |
| buf_(buf_in) { |
| expandBufAdd4BE(buf_, frame_count_); |
| } |
| |
| bool VisitFrame() OVERRIDE REQUIRES_SHARED(Locks::mutator_lock_) { |
| if (GetMethod()->IsRuntimeMethod()) { |
| return true; // The debugger can't do anything useful with a frame that has no Method*. |
| } |
| if (depth_ >= start_frame_ + frame_count_) { |
| return false; |
| } |
| if (depth_ >= start_frame_) { |
| JDWP::FrameId frame_id(GetFrameId()); |
| JDWP::JdwpLocation location; |
| SetJdwpLocation(&location, GetMethod(), GetDexPc()); |
| VLOG(jdwp) << StringPrintf(" Frame %3zd: id=%3" PRIu64 " ", depth_, frame_id) << location; |
| expandBufAdd8BE(buf_, frame_id); |
| expandBufAddLocation(buf_, location); |
| } |
| ++depth_; |
| return true; |
| } |
| |
| private: |
| size_t depth_; |
| const size_t start_frame_; |
| const size_t frame_count_; |
| JDWP::ExpandBuf* buf_; |
| }; |
| |
| ScopedObjectAccessUnchecked soa(Thread::Current()); |
| JDWP::JdwpError error; |
| Thread* thread = DecodeThread(soa, thread_id, &error); |
| if (error != JDWP::ERR_NONE) { |
| return error; |
| } |
| if (!IsSuspendedForDebugger(soa, thread)) { |
| return JDWP::ERR_THREAD_NOT_SUSPENDED; |
| } |
| GetFrameVisitor visitor(thread, start_frame, frame_count, buf); |
| visitor.WalkStack(); |
| return JDWP::ERR_NONE; |
| } |
| |
| JDWP::ObjectId Dbg::GetThreadSelfId() { |
| return GetThreadId(Thread::Current()); |
| } |
| |
| JDWP::ObjectId Dbg::GetThreadId(Thread* thread) { |
| ScopedObjectAccessUnchecked soa(Thread::Current()); |
| return gRegistry->Add(thread->GetPeerFromOtherThread()); |
| } |
| |
| void Dbg::SuspendVM() { |
| // Avoid a deadlock between GC and debugger where GC gets suspended during GC. b/25800335. |
| gc::ScopedGCCriticalSection gcs(Thread::Current(), |
| gc::kGcCauseDebugger, |
| gc::kCollectorTypeDebugger); |
| Runtime::Current()->GetThreadList()->SuspendAllForDebugger(); |
| } |
| |
| void Dbg::ResumeVM() { |
| Runtime::Current()->GetThreadList()->ResumeAllForDebugger(); |
| } |
| |
| JDWP::JdwpError Dbg::SuspendThread(JDWP::ObjectId thread_id, bool request_suspension) { |
| Thread* self = Thread::Current(); |
| ScopedLocalRef<jobject> peer(self->GetJniEnv(), nullptr); |
| { |
| ScopedObjectAccess soa(self); |
| JDWP::JdwpError error; |
| peer.reset(soa.AddLocalReference<jobject>(gRegistry->Get<mirror::Object*>(thread_id, &error))); |
| } |
| if (peer.get() == nullptr) { |
| return JDWP::ERR_THREAD_NOT_ALIVE; |
| } |
| // Suspend thread to build stack trace. |
| bool timed_out; |
| ThreadList* thread_list = Runtime::Current()->GetThreadList(); |
| Thread* thread = thread_list->SuspendThreadByPeer(peer.get(), request_suspension, true, |
| &timed_out); |
| if (thread != nullptr) { |
| return JDWP::ERR_NONE; |
| } else if (timed_out) { |
| return JDWP::ERR_INTERNAL; |
| } else { |
| return JDWP::ERR_THREAD_NOT_ALIVE; |
| } |
| } |
| |
| void Dbg::ResumeThread(JDWP::ObjectId thread_id) { |
| ScopedObjectAccessUnchecked soa(Thread::Current()); |
| JDWP::JdwpError error; |
| mirror::Object* peer = gRegistry->Get<mirror::Object*>(thread_id, &error); |
| CHECK(peer != nullptr) << error; |
| Thread* thread; |
| { |
| MutexLock mu(soa.Self(), *Locks::thread_list_lock_); |
| thread = Thread::FromManagedThread(soa, peer); |
| } |
| if (thread == nullptr) { |
| LOG(WARNING) << "No such thread for resume: " << peer; |
| return; |
| } |
| bool needs_resume; |
| { |
| MutexLock mu2(soa.Self(), *Locks::thread_suspend_count_lock_); |
| needs_resume = thread->GetSuspendCount() > 0; |
| } |
| if (needs_resume) { |
| Runtime::Current()->GetThreadList()->Resume(thread, true); |
| } |
| } |
| |
| void Dbg::SuspendSelf() { |
| Runtime::Current()->GetThreadList()->SuspendSelfForDebugger(); |
| } |
| |
| struct GetThisVisitor : public StackVisitor { |
| GetThisVisitor(Thread* thread, Context* context, JDWP::FrameId frame_id_in) |
| REQUIRES_SHARED(Locks::mutator_lock_) |
| : StackVisitor(thread, context, StackVisitor::StackWalkKind::kIncludeInlinedFrames), |
| this_object(nullptr), |
| frame_id(frame_id_in) {} |
| |
| // TODO: Enable annotalysis. We know lock is held in constructor, but abstraction confuses |
| // annotalysis. |
| virtual bool VisitFrame() NO_THREAD_SAFETY_ANALYSIS { |
| if (frame_id != GetFrameId()) { |
| return true; // continue |
| } else { |
| this_object = GetThisObject(); |
| return false; |
| } |
| } |
| |
| mirror::Object* this_object; |
| JDWP::FrameId frame_id; |
| }; |
| |
| JDWP::JdwpError Dbg::GetThisObject(JDWP::ObjectId thread_id, JDWP::FrameId frame_id, |
| JDWP::ObjectId* result) { |
| ScopedObjectAccessUnchecked soa(Thread::Current()); |
| JDWP::JdwpError error; |
| Thread* thread = DecodeThread(soa, thread_id, &error); |
| if (error != JDWP::ERR_NONE) { |
| return error; |
| } |
| if (!IsSuspendedForDebugger(soa, thread)) { |
| return JDWP::ERR_THREAD_NOT_SUSPENDED; |
| } |
| std::unique_ptr<Context> context(Context::Create()); |
| GetThisVisitor visitor(thread, context.get(), frame_id); |
| visitor.WalkStack(); |
| *result = gRegistry->Add(visitor.this_object); |
| return JDWP::ERR_NONE; |
| } |
| |
| // Walks the stack until we find the frame with the given FrameId. |
| class FindFrameVisitor FINAL : public StackVisitor { |
| public: |
| FindFrameVisitor(Thread* thread, Context* context, JDWP::FrameId frame_id) |
| REQUIRES_SHARED(Locks::mutator_lock_) |
| : StackVisitor(thread, context, StackVisitor::StackWalkKind::kIncludeInlinedFrames), |
| frame_id_(frame_id), |
| error_(JDWP::ERR_INVALID_FRAMEID) {} |
| |
| // TODO: Enable annotalysis. We know lock is held in constructor, but abstraction confuses |
| // annotalysis. |
| bool VisitFrame() NO_THREAD_SAFETY_ANALYSIS { |
| if (GetFrameId() != frame_id_) { |
| return true; // Not our frame, carry on. |
| } |
| ArtMethod* m = GetMethod(); |
| if (m->IsNative()) { |
| // We can't read/write local value from/into native method. |
| error_ = JDWP::ERR_OPAQUE_FRAME; |
| } else { |
| // We found our frame. |
| error_ = JDWP::ERR_NONE; |
| } |
| return false; |
| } |
| |
| JDWP::JdwpError GetError() const { |
| return error_; |
| } |
| |
| private: |
| const JDWP::FrameId frame_id_; |
| JDWP::JdwpError error_; |
| |
| DISALLOW_COPY_AND_ASSIGN(FindFrameVisitor); |
| }; |
| |
| JDWP::JdwpError Dbg::GetLocalValues(JDWP::Request* request, JDWP::ExpandBuf* pReply) { |
| JDWP::ObjectId thread_id = request->ReadThreadId(); |
| JDWP::FrameId frame_id = request->ReadFrameId(); |
| |
| ScopedObjectAccessUnchecked soa(Thread::Current()); |
| JDWP::JdwpError error; |
| Thread* thread = DecodeThread(soa, thread_id, &error); |
| if (error != JDWP::ERR_NONE) { |
| return error; |
| } |
| if (!IsSuspendedForDebugger(soa, thread)) { |
| return JDWP::ERR_THREAD_NOT_SUSPENDED; |
| } |
| // Find the frame with the given frame_id. |
| std::unique_ptr<Context> context(Context::Create()); |
| FindFrameVisitor visitor(thread, context.get(), frame_id); |
| visitor.WalkStack(); |
| if (visitor.GetError() != JDWP::ERR_NONE) { |
| return visitor.GetError(); |
| } |
| |
| // Read the values from visitor's context. |
| int32_t slot_count = request->ReadSigned32("slot count"); |
| expandBufAdd4BE(pReply, slot_count); /* "int values" */ |
| for (int32_t i = 0; i < slot_count; ++i) { |
| uint32_t slot = request->ReadUnsigned32("slot"); |
| JDWP::JdwpTag reqSigByte = request->ReadTag(); |
| |
| VLOG(jdwp) << " --> slot " << slot << " " << reqSigByte; |
| |
| size_t width = Dbg::GetTagWidth(reqSigByte); |
| uint8_t* ptr = expandBufAddSpace(pReply, width + 1); |
| error = Dbg::GetLocalValue(visitor, soa, slot, reqSigByte, ptr, width); |
| if (error != JDWP::ERR_NONE) { |
| return error; |
| } |
| } |
| return JDWP::ERR_NONE; |
| } |
| |
| constexpr JDWP::JdwpError kStackFrameLocalAccessError = JDWP::ERR_ABSENT_INFORMATION; |
| |
| static std::string GetStackContextAsString(const StackVisitor& visitor) |
| REQUIRES_SHARED(Locks::mutator_lock_) { |
| return StringPrintf(" at DEX pc 0x%08x in method %s", visitor.GetDexPc(false), |
| ArtMethod::PrettyMethod(visitor.GetMethod()).c_str()); |
| } |
| |
| static JDWP::JdwpError FailGetLocalValue(const StackVisitor& visitor, uint16_t vreg, |
| JDWP::JdwpTag tag) |
| REQUIRES_SHARED(Locks::mutator_lock_) { |
| LOG(ERROR) << "Failed to read " << tag << " local from register v" << vreg |
| << GetStackContextAsString(visitor); |
| return kStackFrameLocalAccessError; |
| } |
| |
| JDWP::JdwpError Dbg::GetLocalValue(const StackVisitor& visitor, ScopedObjectAccessUnchecked& soa, |
| int slot, JDWP::JdwpTag tag, uint8_t* buf, size_t width) { |
| ArtMethod* m = visitor.GetMethod(); |
| JDWP::JdwpError error = JDWP::ERR_NONE; |
| uint16_t vreg = DemangleSlot(slot, m, &error); |
| if (error != JDWP::ERR_NONE) { |
| return error; |
| } |
| // TODO: check that the tag is compatible with the actual type of the slot! |
| switch (tag) { |
| case JDWP::JT_BOOLEAN: { |
| CHECK_EQ(width, 1U); |
| uint32_t intVal; |
| if (!visitor.GetVReg(m, vreg, kIntVReg, &intVal)) { |
| return FailGetLocalValue(visitor, vreg, tag); |
| } |
| VLOG(jdwp) << "get boolean local " << vreg << " = " << intVal; |
| JDWP::Set1(buf + 1, intVal != 0); |
| break; |
| } |
| case JDWP::JT_BYTE: { |
| CHECK_EQ(width, 1U); |
| uint32_t intVal; |
| if (!visitor.GetVReg(m, vreg, kIntVReg, &intVal)) { |
| return FailGetLocalValue(visitor, vreg, tag); |
| } |
| VLOG(jdwp) << "get byte local " << vreg << " = " << intVal; |
| JDWP::Set1(buf + 1, intVal); |
| break; |
| } |
| case JDWP::JT_SHORT: |
| case JDWP::JT_CHAR: { |
| CHECK_EQ(width, 2U); |
| uint32_t intVal; |
| if (!visitor.GetVReg(m, vreg, kIntVReg, &intVal)) { |
| return FailGetLocalValue(visitor, vreg, tag); |
| } |
| VLOG(jdwp) << "get short/char local " << vreg << " = " << intVal; |
| JDWP::Set2BE(buf + 1, intVal); |
| break; |
| } |
| case JDWP::JT_INT: { |
| CHECK_EQ(width, 4U); |
| uint32_t intVal; |
| if (!visitor.GetVReg(m, vreg, kIntVReg, &intVal)) { |
| return FailGetLocalValue(visitor, vreg, tag); |
| } |
| VLOG(jdwp) << "get int local " << vreg << " = " << intVal; |
| JDWP::Set4BE(buf + 1, intVal); |
| break; |
| } |
| case JDWP::JT_FLOAT: { |
| CHECK_EQ(width, 4U); |
| uint32_t intVal; |
| if (!visitor.GetVReg(m, vreg, kFloatVReg, &intVal)) { |
| return FailGetLocalValue(visitor, vreg, tag); |
| } |
| VLOG(jdwp) << "get float local " << vreg << " = " << intVal; |
| JDWP::Set4BE(buf + 1, intVal); |
| break; |
| } |
| case JDWP::JT_ARRAY: |
| case JDWP::JT_CLASS_LOADER: |
| case JDWP::JT_CLASS_OBJECT: |
| case JDWP::JT_OBJECT: |
| case JDWP::JT_STRING: |
| case JDWP::JT_THREAD: |
| case JDWP::JT_THREAD_GROUP: { |
| CHECK_EQ(width, sizeof(JDWP::ObjectId)); |
| uint32_t intVal; |
| if (!visitor.GetVReg(m, vreg, kReferenceVReg, &intVal)) { |
| return FailGetLocalValue(visitor, vreg, tag); |
| } |
| mirror::Object* o = reinterpret_cast<mirror::Object*>(intVal); |
| VLOG(jdwp) << "get " << tag << " object local " << vreg << " = " << o; |
| if (!Runtime::Current()->GetHeap()->IsValidObjectAddress(o)) { |
| LOG(FATAL) << StringPrintf("Found invalid object %#" PRIxPTR " in register v%u", |
| reinterpret_cast<uintptr_t>(o), vreg) |
| << GetStackContextAsString(visitor); |
| UNREACHABLE(); |
| } |
| tag = TagFromObject(soa, o); |
| JDWP::SetObjectId(buf + 1, gRegistry->Add(o)); |
| break; |
| } |
| case JDWP::JT_DOUBLE: { |
| CHECK_EQ(width, 8U); |
| uint64_t longVal; |
| if (!visitor.GetVRegPair(m, vreg, kDoubleLoVReg, kDoubleHiVReg, &longVal)) { |
| return FailGetLocalValue(visitor, vreg, tag); |
| } |
| VLOG(jdwp) << "get double local " << vreg << " = " << longVal; |
| JDWP::Set8BE(buf + 1, longVal); |
| break; |
| } |
| case JDWP::JT_LONG: { |
| CHECK_EQ(width, 8U); |
| uint64_t longVal; |
| if (!visitor.GetVRegPair(m, vreg, kLongLoVReg, kLongHiVReg, &longVal)) { |
| return FailGetLocalValue(visitor, vreg, tag); |
| } |
| VLOG(jdwp) << "get long local " << vreg << " = " << longVal; |
| JDWP::Set8BE(buf + 1, longVal); |
| break; |
| } |
| default: |
| LOG(FATAL) << "Unknown tag " << tag; |
| UNREACHABLE(); |
| } |
| |
| // Prepend tag, which may have been updated. |
| JDWP::Set1(buf, tag); |
| return JDWP::ERR_NONE; |
| } |
| |
| JDWP::JdwpError Dbg::SetLocalValues(JDWP::Request* request) { |
| JDWP::ObjectId thread_id = request->ReadThreadId(); |
| JDWP::FrameId frame_id = request->ReadFrameId(); |
| |
| ScopedObjectAccessUnchecked soa(Thread::Current()); |
| JDWP::JdwpError error; |
| Thread* thread = DecodeThread(soa, thread_id, &error); |
| if (error != JDWP::ERR_NONE) { |
| return error; |
| } |
| if (!IsSuspendedForDebugger(soa, thread)) { |
| return JDWP::ERR_THREAD_NOT_SUSPENDED; |
| } |
| // Find the frame with the given frame_id. |
| std::unique_ptr<Context> context(Context::Create()); |
| FindFrameVisitor visitor(thread, context.get(), frame_id); |
| visitor.WalkStack(); |
| if (visitor.GetError() != JDWP::ERR_NONE) { |
| return visitor.GetError(); |
| } |
| |
| // Writes the values into visitor's context. |
| int32_t slot_count = request->ReadSigned32("slot count"); |
| for (int32_t i = 0; i < slot_count; ++i) { |
| uint32_t slot = request->ReadUnsigned32("slot"); |
| JDWP::JdwpTag sigByte = request->ReadTag(); |
| size_t width = Dbg::GetTagWidth(sigByte); |
| uint64_t value = request->ReadValue(width); |
| |
| VLOG(jdwp) << " --> slot " << slot << " " << sigByte << " " << value; |
| error = Dbg::SetLocalValue(thread, visitor, slot, sigByte, value, width); |
| if (error != JDWP::ERR_NONE) { |
| return error; |
| } |
| } |
| return JDWP::ERR_NONE; |
| } |
| |
| template<typename T> |
| static JDWP::JdwpError FailSetLocalValue(const StackVisitor& visitor, uint16_t vreg, |
| JDWP::JdwpTag tag, T value) |
| REQUIRES_SHARED(Locks::mutator_lock_) { |
| LOG(ERROR) << "Failed to write " << tag << " local " << value |
| << " (0x" << std::hex << value << ") into register v" << vreg |
| << GetStackContextAsString(visitor); |
| return kStackFrameLocalAccessError; |
| } |
| |
| JDWP::JdwpError Dbg::SetLocalValue(Thread* thread, StackVisitor& visitor, int slot, |
| JDWP::JdwpTag tag, uint64_t value, size_t width) { |
| ArtMethod* m = visitor.GetMethod(); |
| JDWP::JdwpError error = JDWP::ERR_NONE; |
| uint16_t vreg = DemangleSlot(slot, m, &error); |
| if (error != JDWP::ERR_NONE) { |
| return error; |
| } |
| // TODO: check that the tag is compatible with the actual type of the slot! |
| switch (tag) { |
| case JDWP::JT_BOOLEAN: |
| case JDWP::JT_BYTE: |
| CHECK_EQ(width, 1U); |
| if (!visitor.SetVReg(m, vreg, static_cast<uint32_t>(value), kIntVReg)) { |
| return FailSetLocalValue(visitor, vreg, tag, static_cast<uint32_t>(value)); |
| } |
| break; |
| case JDWP::JT_SHORT: |
| case JDWP::JT_CHAR: |
| CHECK_EQ(width, 2U); |
| if (!visitor.SetVReg(m, vreg, static_cast<uint32_t>(value), kIntVReg)) { |
| return FailSetLocalValue(visitor, vreg, tag, static_cast<uint32_t>(value)); |
| } |
| break; |
| case JDWP::JT_INT: |
| CHECK_EQ(width, 4U); |
| if (!visitor.SetVReg(m, vreg, static_cast<uint32_t>(value), kIntVReg)) { |
| return FailSetLocalValue(visitor, vreg, tag, static_cast<uint32_t>(value)); |
| } |
| break; |
| case JDWP::JT_FLOAT: |
| CHECK_EQ(width, 4U); |
| if (!visitor.SetVReg(m, vreg, static_cast<uint32_t>(value), kFloatVReg)) { |
| return FailSetLocalValue(visitor, vreg, tag, static_cast<uint32_t>(value)); |
| } |
| break; |
| case JDWP::JT_ARRAY: |
| case JDWP::JT_CLASS_LOADER: |
| case JDWP::JT_CLASS_OBJECT: |
| case JDWP::JT_OBJECT: |
| case JDWP::JT_STRING: |
| case JDWP::JT_THREAD: |
| case JDWP::JT_THREAD_GROUP: { |
| CHECK_EQ(width, sizeof(JDWP::ObjectId)); |
| mirror::Object* o = gRegistry->Get<mirror::Object*>(static_cast<JDWP::ObjectId>(value), |
| &error); |
| if (error != JDWP::ERR_NONE) { |
| VLOG(jdwp) << tag << " object " << o << " is an invalid object"; |
| return JDWP::ERR_INVALID_OBJECT; |
| } |
| if (!visitor.SetVReg(m, vreg, static_cast<uint32_t>(reinterpret_cast<uintptr_t>(o)), |
| kReferenceVReg)) { |
| return FailSetLocalValue(visitor, vreg, tag, reinterpret_cast<uintptr_t>(o)); |
| } |
| break; |
| } |
| case JDWP::JT_DOUBLE: { |
| CHECK_EQ(width, 8U); |
| if (!visitor.SetVRegPair(m, vreg, value, kDoubleLoVReg, kDoubleHiVReg)) { |
| return FailSetLocalValue(visitor, vreg, tag, value); |
| } |
| break; |
| } |
| case JDWP::JT_LONG: { |
| CHECK_EQ(width, 8U); |
| if (!visitor.SetVRegPair(m, vreg, value, kLongLoVReg, kLongHiVReg)) { |
| return FailSetLocalValue(visitor, vreg, tag, value); |
| } |
| break; |
| } |
| default: |
| LOG(FATAL) << "Unknown tag " << tag; |
| UNREACHABLE(); |
| } |
| |
| // If we set the local variable in a compiled frame, we need to trigger a deoptimization of |
| // the stack so we continue execution with the interpreter using the new value(s) of the updated |
| // local variable(s). To achieve this, we install instrumentation exit stub on each method of the |
| // thread's stack. The stub will cause the deoptimization to happen. |
| if (!visitor.IsShadowFrame() && thread->HasDebuggerShadowFrames()) { |
| Runtime::Current()->GetInstrumentation()->InstrumentThreadStack(thread); |
| } |
| |
| return JDWP::ERR_NONE; |
| } |
| |
| static void SetEventLocation(JDWP::EventLocation* location, ArtMethod* m, uint32_t dex_pc) |
| REQUIRES_SHARED(Locks::mutator_lock_) { |
| DCHECK(location != nullptr); |
| if (m == nullptr) { |
| memset(location, 0, sizeof(*location)); |
| } else { |
| location->method = GetCanonicalMethod(m); |
| location->dex_pc = (m->IsNative() || m->IsProxyMethod()) ? static_cast<uint32_t>(-1) : dex_pc; |
| } |
| } |
| |
| void Dbg::PostLocationEvent(ArtMethod* m, int dex_pc, mirror::Object* this_object, |
| int event_flags, const JValue* return_value) { |
| if (!IsDebuggerActive()) { |
| return; |
| } |
| DCHECK(m != nullptr); |
| DCHECK_EQ(m->IsStatic(), this_object == nullptr); |
| JDWP::EventLocation location; |
| SetEventLocation(&location, m, dex_pc); |
| |
| // We need to be sure no exception is pending when calling JdwpState::PostLocationEvent. |
| // This is required to be able to call JNI functions to create JDWP ids. To achieve this, |
| // we temporarily clear the current thread's exception (if any) and will restore it after |
| // the call. |
| // Note: the only way to get a pending exception here is to suspend on a move-exception |
| // instruction. |
| Thread* const self = Thread::Current(); |
| StackHandleScope<1> hs(self); |
| Handle<mirror::Throwable> pending_exception(hs.NewHandle(self->GetException())); |
| self->ClearException(); |
| if (kIsDebugBuild && pending_exception != nullptr) { |
| const DexFile::CodeItem* code_item = location.method->GetCodeItem(); |
| const Instruction* instr = Instruction::At(&code_item->insns_[location.dex_pc]); |
| CHECK_EQ(Instruction::MOVE_EXCEPTION, instr->Opcode()); |
| } |
| |
| gJdwpState->PostLocationEvent(&location, this_object, event_flags, return_value); |
| |
| if (pending_exception != nullptr) { |
| self->SetException(pending_exception.Get()); |
| } |
| } |
| |
| void Dbg::PostFieldAccessEvent(ArtMethod* m, int dex_pc, |
| mirror::Object* this_object, ArtField* f) { |
| if (!IsDebuggerActive()) { |
| return; |
| } |
| DCHECK(m != nullptr); |
| DCHECK(f != nullptr); |
| JDWP::EventLocation location; |
| SetEventLocation(&location, m, dex_pc); |
| |
| gJdwpState->PostFieldEvent(&location, f, this_object, nullptr, false); |
| } |
| |
| void Dbg::PostFieldModificationEvent(ArtMethod* m, int dex_pc, |
| mirror::Object* this_object, ArtField* f, |
| const JValue* field_value) { |
| if (!IsDebuggerActive()) { |
| return; |
| } |
| DCHECK(m != nullptr); |
| DCHECK(f != nullptr); |
| DCHECK(field_value != nullptr); |
| JDWP::EventLocation location; |
| SetEventLocation(&location, m, dex_pc); |
| |
| gJdwpState->PostFieldEvent(&location, f, this_object, field_value, true); |
| } |
| |
| /** |
| * Finds the location where this exception will be caught. We search until we reach the top |
| * frame, in which case this exception is considered uncaught. |
| */ |
| class CatchLocationFinder : public StackVisitor { |
| public: |
| CatchLocationFinder(Thread* self, const Handle<mirror::Throwable>& exception, Context* context) |
| REQUIRES_SHARED(Locks::mutator_lock_) |
| : StackVisitor(self, context, StackVisitor::StackWalkKind::kIncludeInlinedFrames), |
| exception_(exception), |
| handle_scope_(self), |
| this_at_throw_(handle_scope_.NewHandle<mirror::Object>(nullptr)), |
| catch_method_(nullptr), |
| throw_method_(nullptr), |
| catch_dex_pc_(DexFile::kDexNoIndex), |
| throw_dex_pc_(DexFile::kDexNoIndex) { |
| } |
| |
| bool VisitFrame() OVERRIDE REQUIRES_SHARED(Locks::mutator_lock_) { |
| ArtMethod* method = GetMethod(); |
| DCHECK(method != nullptr); |
| if (method->IsRuntimeMethod()) { |
| // Ignore callee save method. |
| DCHECK(method->IsCalleeSaveMethod()); |
| return true; |
| } |
| |
| uint32_t dex_pc = GetDexPc(); |
| if (throw_method_ == nullptr) { |
| // First Java method found. It is either the method that threw the exception, |
| // or the Java native method that is reporting an exception thrown by |
| // native code. |
| this_at_throw_.Assign(GetThisObject()); |
| throw_method_ = method; |
| throw_dex_pc_ = dex_pc; |
| } |
| |
| if (dex_pc != DexFile::kDexNoIndex) { |
| StackHandleScope<1> hs(GetThread()); |
| uint32_t found_dex_pc; |
| Handle<mirror::Class> exception_class(hs.NewHandle(exception_->GetClass())); |
| bool unused_clear_exception; |
| found_dex_pc = method->FindCatchBlock(exception_class, dex_pc, &unused_clear_exception); |
| if (found_dex_pc != DexFile::kDexNoIndex) { |
| catch_method_ = method; |
| catch_dex_pc_ = found_dex_pc; |
| return false; // End stack walk. |
| } |
| } |
| return true; // Continue stack walk. |
| } |
| |
| ArtMethod* GetCatchMethod() REQUIRES_SHARED(Locks::mutator_lock_) { |
| return catch_method_; |
| } |
| |
| ArtMethod* GetThrowMethod() REQUIRES_SHARED(Locks::mutator_lock_) { |
| return throw_method_; |
| } |
| |
| mirror::Object* GetThisAtThrow() REQUIRES_SHARED(Locks::mutator_lock_) { |
| return this_at_throw_.Get(); |
| } |
| |
| uint32_t GetCatchDexPc() const { |
| return catch_dex_pc_; |
| } |
| |
| uint32_t GetThrowDexPc() const { |
| return throw_dex_pc_; |
| } |
| |
| private: |
| const Handle<mirror::Throwable>& exception_; |
| StackHandleScope<1> handle_scope_; |
| MutableHandle<mirror::Object> this_at_throw_; |
| ArtMethod* catch_method_; |
| ArtMethod* throw_method_; |
| uint32_t catch_dex_pc_; |
| uint32_t throw_dex_pc_; |
| |
| DISALLOW_COPY_AND_ASSIGN(CatchLocationFinder); |
| }; |
| |
| void Dbg::PostException(mirror::Throwable* exception_object) { |
| if (!IsDebuggerActive()) { |
| return; |
| } |
| Thread* const self = Thread::Current(); |
| StackHandleScope<1> handle_scope(self); |
| Handle<mirror::Throwable> h_exception(handle_scope.NewHandle(exception_object)); |
| std::unique_ptr<Context> context(Context::Create()); |
| CatchLocationFinder clf(self, h_exception, context.get()); |
| clf.WalkStack(/* include_transitions */ false); |
| JDWP::EventLocation exception_throw_location; |
| SetEventLocation(&exception_throw_location, clf.GetThrowMethod(), clf.GetThrowDexPc()); |
| JDWP::EventLocation exception_catch_location; |
| SetEventLocation(&exception_catch_location, clf.GetCatchMethod(), clf.GetCatchDexPc()); |
| |
| gJdwpState->PostException(&exception_throw_location, h_exception.Get(), &exception_catch_location, |
| clf.GetThisAtThrow()); |
| } |
| |
| void Dbg::PostClassPrepare(mirror::Class* c) { |
| if (!IsDebuggerActive()) { |
| return; |
| } |
| gJdwpState->PostClassPrepare(c); |
| } |
| |
| void Dbg::UpdateDebugger(Thread* thread, mirror::Object* this_object, |
| ArtMethod* m, uint32_t dex_pc, |
| int event_flags, const JValue* return_value) { |
| if (!IsDebuggerActive() || dex_pc == static_cast<uint32_t>(-2) /* fake method exit */) { |
| return; |
| } |
| |
| if (IsBreakpoint(m, dex_pc)) { |
| event_flags |= kBreakpoint; |
| } |
| |
| // If the debugger is single-stepping one of our threads, check to |
| // see if we're that thread and we've reached a step point. |
| const SingleStepControl* single_step_control = thread->GetSingleStepControl(); |
| if (single_step_control != nullptr) { |
| CHECK(!m->IsNative()); |
| if (single_step_control->GetStepDepth() == JDWP::SD_INTO) { |
| // Step into method calls. We break when the line number |
| // or method pointer changes. If we're in SS_MIN mode, we |
| // always stop. |
| if (single_step_control->GetMethod() != m) { |
| event_flags |= kSingleStep; |
| VLOG(jdwp) << "SS new method"; |
| } else if (single_step_control->GetStepSize() == JDWP::SS_MIN) { |
| event_flags |= kSingleStep; |
| VLOG(jdwp) << "SS new instruction"; |
| } else if (single_step_control->ContainsDexPc(dex_pc)) { |
| event_flags |= kSingleStep; |
| VLOG(jdwp) << "SS new line"; |
| } |
| } else if (single_step_control->GetStepDepth() == JDWP::SD_OVER) { |
| // Step over method calls. We break when the line number is |
| // different and the frame depth is <= the original frame |
| // depth. (We can't just compare on the method, because we |
| // might get unrolled past it by an exception, and it's tricky |
| // to identify recursion.) |
| |
| int stack_depth = GetStackDepth(thread); |
| |
| if (stack_depth < single_step_control->GetStackDepth()) { |
| // Popped up one or more frames, always trigger. |
| event_flags |= kSingleStep; |
| VLOG(jdwp) << "SS method pop"; |
| } else if (stack_depth == single_step_control->GetStackDepth()) { |
| // Same depth, see if we moved. |
| if (single_step_control->GetStepSize() == JDWP::SS_MIN) { |
| event_flags |= kSingleStep; |
| VLOG(jdwp) << "SS new instruction"; |
| } else if (single_step_control->ContainsDexPc(dex_pc)) { |
| event_flags |= kSingleStep; |
| VLOG(jdwp) << "SS new line"; |
| } |
| } |
| } else { |
| CHECK_EQ(single_step_control->GetStepDepth(), JDWP::SD_OUT); |
| // Return from the current method. We break when the frame |
| // depth pops up. |
| |
| // This differs from the "method exit" break in that it stops |
| // with the PC at the next instruction in the returned-to |
| // function, rather than the end of the returning function. |
| |
| int stack_depth = GetStackDepth(thread); |
| if (stack_depth < single_step_control->GetStackDepth()) { |
| event_flags |= kSingleStep; |
| VLOG(jdwp) << "SS method pop"; |
| } |
| } |
| } |
| |
| // If there's something interesting going on, see if it matches one |
| // of the debugger filters. |
| if (event_flags != 0) { |
| Dbg::PostLocationEvent(m, dex_pc, this_object, event_flags, return_value); |
| } |
| } |
| |
| size_t* Dbg::GetReferenceCounterForEvent(uint32_t instrumentation_event) { |
| switch (instrumentation_event) { |
| case instrumentation::Instrumentation::kMethodEntered: |
| return &method_enter_event_ref_count_; |
| case instrumentation::Instrumentation::kMethodExited: |
| return &method_exit_event_ref_count_; |
| case instrumentation::Instrumentation::kDexPcMoved: |
| return &dex_pc_change_event_ref_count_; |
| case instrumentation::Instrumentation::kFieldRead: |
| return &field_read_event_ref_count_; |
| case instrumentation::Instrumentation::kFieldWritten: |
| return &field_write_event_ref_count_; |
| case instrumentation::Instrumentation::kExceptionCaught: |
| return &exception_catch_event_ref_count_; |
| default: |
| return nullptr; |
| } |
| } |
| |
| // Process request while all mutator threads are suspended. |
| void Dbg::ProcessDeoptimizationRequest(const DeoptimizationRequest& request) { |
| instrumentation::Instrumentation* instrumentation = Runtime::Current()->GetInstrumentation(); |
| switch (request.GetKind()) { |
| case DeoptimizationRequest::kNothing: |
| LOG(WARNING) << "Ignoring empty deoptimization request."; |
| break; |
| case DeoptimizationRequest::kRegisterForEvent: |
| VLOG(jdwp) << StringPrintf("Add debugger as listener for instrumentation event 0x%x", |
| request.InstrumentationEvent()); |
| instrumentation->AddListener(&gDebugInstrumentationListener, request.InstrumentationEvent()); |
| instrumentation_events_ |= request.InstrumentationEvent(); |
| break; |
| case DeoptimizationRequest::kUnregisterForEvent: |
| VLOG(jdwp) << StringPrintf("Remove debugger as listener for instrumentation event 0x%x", |
| request.InstrumentationEvent()); |
| instrumentation->RemoveListener(&gDebugInstrumentationListener, |
| request.InstrumentationEvent()); |
| instrumentation_events_ &= ~request.InstrumentationEvent(); |
| break; |
| case DeoptimizationRequest::kFullDeoptimization: |
| VLOG(jdwp) << "Deoptimize the world ..."; |
| instrumentation->DeoptimizeEverything(kDbgInstrumentationKey); |
| VLOG(jdwp) << "Deoptimize the world DONE"; |
| break; |
| case DeoptimizationRequest::kFullUndeoptimization: |
| VLOG(jdwp) << "Undeoptimize the world ..."; |
| instrumentation->UndeoptimizeEverything(kDbgInstrumentationKey); |
| VLOG(jdwp) << "Undeoptimize the world DONE"; |
| break; |
| case DeoptimizationRequest::kSelectiveDeoptimization: |
| VLOG(jdwp) << "Deoptimize method " << ArtMethod::PrettyMethod(request.Method()) << " ..."; |
| instrumentation->Deoptimize(request.Method()); |
| VLOG(jdwp) << "Deoptimize method " << ArtMethod::PrettyMethod(request.Method()) << " DONE"; |
| break; |
| case DeoptimizationRequest::kSelectiveUndeoptimization: |
| VLOG(jdwp) << "Undeoptimize method " << ArtMethod::PrettyMethod(request.Method()) << " ..."; |
| instrumentation->Undeoptimize(request.Method()); |
| VLOG(jdwp) << "Undeoptimize method " << ArtMethod::PrettyMethod(request.Method()) << " DONE"; |
| break; |
| default: |
| LOG(FATAL) << "Unsupported deoptimization request kind " << request.GetKind(); |
| break; |
| } |
| } |
| |
| void Dbg::RequestDeoptimization(const DeoptimizationRequest& req) { |
| if (req.GetKind() == DeoptimizationRequest::kNothing) { |
| // Nothing to do. |
| return; |
| } |
| MutexLock mu(Thread::Current(), *Locks::deoptimization_lock_); |
| RequestDeoptimizationLocked(req); |
| } |
| |
| void Dbg::RequestDeoptimizationLocked(const DeoptimizationRequest& req) { |
| switch (req.GetKind()) { |
| case DeoptimizationRequest::kRegisterForEvent: { |
| DCHECK_NE(req.InstrumentationEvent(), 0u); |
| size_t* counter = GetReferenceCounterForEvent(req.InstrumentationEvent()); |
| CHECK(counter != nullptr) << StringPrintf("No counter for instrumentation event 0x%x", |
| req.InstrumentationEvent()); |
| if (*counter == 0) { |
| VLOG(jdwp) << StringPrintf("Queue request #%zd to start listening to instrumentation event 0x%x", |
| deoptimization_requests_.size(), req.InstrumentationEvent()); |
| deoptimization_requests_.push_back(req); |
| } |
| *counter = *counter + 1; |
| break; |
| } |
| case DeoptimizationRequest::kUnregisterForEvent: { |
| DCHECK_NE(req.InstrumentationEvent(), 0u); |
| size_t* counter = GetReferenceCounterForEvent(req.InstrumentationEvent()); |
| CHECK(counter != nullptr) << StringPrintf("No counter for instrumentation event 0x%x", |
| req.InstrumentationEvent()); |
| *counter = *counter - 1; |
| if (*counter == 0) { |
| VLOG(jdwp) << StringPrintf("Queue request #%zd to stop listening to instrumentation event 0x%x", |
| deoptimization_requests_.size(), req.InstrumentationEvent()); |
| deoptimization_requests_.push_back(req); |
| } |
| break; |
| } |
| case DeoptimizationRequest::kFullDeoptimization: { |
| DCHECK(req.Method() == nullptr); |
| if (full_deoptimization_event_count_ == 0) { |
| VLOG(jdwp) << "Queue request #" << deoptimization_requests_.size() |
| << " for full deoptimization"; |
| deoptimization_requests_.push_back(req); |
| } |
| ++full_deoptimization_event_count_; |
| break; |
| } |
| case DeoptimizationRequest::kFullUndeoptimization: { |
| DCHECK(req.Method() == nullptr); |
| DCHECK_GT(full_deoptimization_event_count_, 0U); |
| --full_deoptimization_event_count_; |
| if (full_deoptimization_event_count_ == 0) { |
| VLOG(jdwp) << "Queue request #" << deoptimization_requests_.size() |
| << " for full undeoptimization"; |
| deoptimization_requests_.push_back(req); |
| } |
| break; |
| } |
| case DeoptimizationRequest::kSelectiveDeoptimization: { |
| DCHECK(req.Method() != nullptr); |
| VLOG(jdwp) << "Queue request #" << deoptimization_requests_.size() |
| << " for deoptimization of " << req.Method()->PrettyMethod(); |
| deoptimization_requests_.push_back(req); |
| break; |
| } |
| case DeoptimizationRequest::kSelectiveUndeoptimization: { |
| DCHECK(req.Method() != nullptr); |
| VLOG(jdwp) << "Queue request #" << deoptimization_requests_.size() |
| << " for undeoptimization of " << req.Method()->PrettyMethod(); |
| deoptimization_requests_.push_back(req); |
| break; |
| } |
| default: { |
| LOG(FATAL) << "Unknown deoptimization request kind " << req.GetKind(); |
| break; |
| } |
| } |
| } |
| |
| void Dbg::ManageDeoptimization() { |
| Thread* const self = Thread::Current(); |
| { |
| // Avoid suspend/resume if there is no pending request. |
| MutexLock mu(self, *Locks::deoptimization_lock_); |
| if (deoptimization_requests_.empty()) { |
| return; |
| } |
| } |
| CHECK_EQ(self->GetState(), kRunnable); |
| ScopedThreadSuspension sts(self, kWaitingForDeoptimization); |
| // Required for ProcessDeoptimizationRequest. |
| gc::ScopedGCCriticalSection gcs(self, |
| gc::kGcCauseInstrumentation, |
| gc::kCollectorTypeInstrumentation); |
| // We need to suspend mutator threads first. |
| ScopedSuspendAll ssa(__FUNCTION__); |
| const ThreadState old_state = self->SetStateUnsafe(kRunnable); |
| { |
| MutexLock mu(self, *Locks::deoptimization_lock_); |
| size_t req_index = 0; |
| for (DeoptimizationRequest& request : deoptimization_requests_) { |
| VLOG(jdwp) << "Process deoptimization request #" << req_index++; |
| ProcessDeoptimizationRequest(request); |
| } |
| deoptimization_requests_.clear(); |
| } |
| CHECK_EQ(self->SetStateUnsafe(old_state), kRunnable); |
| } |
| |
| static const Breakpoint* FindFirstBreakpointForMethod(ArtMethod* m) |
| REQUIRES_SHARED(Locks::mutator_lock_, Locks::breakpoint_lock_) { |
| for (Breakpoint& breakpoint : gBreakpoints) { |
| if (breakpoint.IsInMethod(m)) { |
| return &breakpoint; |
| } |
| } |
| return nullptr; |
| } |
| |
| bool Dbg::MethodHasAnyBreakpoints(ArtMethod* method) { |
| ReaderMutexLock mu(Thread::Current(), *Locks::breakpoint_lock_); |
| return FindFirstBreakpointForMethod(method) != nullptr; |
| } |
| |
| // Sanity checks all existing breakpoints on the same method. |
| static void SanityCheckExistingBreakpoints(ArtMethod* m, |
| DeoptimizationRequest::Kind deoptimization_kind) |
| REQUIRES_SHARED(Locks::mutator_lock_, Locks::breakpoint_lock_) { |
| for (const Breakpoint& breakpoint : gBreakpoints) { |
| if (breakpoint.IsInMethod(m)) { |
| CHECK_EQ(deoptimization_kind, breakpoint.GetDeoptimizationKind()); |
| } |
| } |
| instrumentation::Instrumentation* instrumentation = Runtime::Current()->GetInstrumentation(); |
| if (deoptimization_kind == DeoptimizationRequest::kFullDeoptimization) { |
| // We should have deoptimized everything but not "selectively" deoptimized this method. |
| CHECK(instrumentation->AreAllMethodsDeoptimized()); |
| CHECK(!instrumentation->IsDeoptimized(m)); |
| } else if (deoptimization_kind == DeoptimizationRequest::kSelectiveDeoptimization) { |
| // We should have "selectively" deoptimized this method. |
| // Note: while we have not deoptimized everything for this method, we may have done it for |
| // another event. |
| CHECK(instrumentation->IsDeoptimized(m)); |
| } else { |
| // This method does not require deoptimization. |
| CHECK_EQ(deoptimization_kind, DeoptimizationRequest::kNothing); |
| CHECK(!instrumentation->IsDeoptimized(m)); |
| } |
| } |
| |
| // Returns the deoptimization kind required to set a breakpoint in a method. |
| // If a breakpoint has already been set, we also return the first breakpoint |
| // through the given 'existing_brkpt' pointer. |
| static DeoptimizationRequest::Kind GetRequiredDeoptimizationKind(Thread* self, |
| ArtMethod* m, |
| const Breakpoint** existing_brkpt) |
| REQUIRES_SHARED(Locks::mutator_lock_) { |
| if (!Dbg::RequiresDeoptimization()) { |
| // We already run in interpreter-only mode so we don't need to deoptimize anything. |
| VLOG(jdwp) << "No need for deoptimization when fully running with interpreter for method " |
| << ArtMethod::PrettyMethod(m); |
| return DeoptimizationRequest::kNothing; |
| } |
| const Breakpoint* first_breakpoint; |
| { |
| ReaderMutexLock mu(self, *Locks::breakpoint_lock_); |
| first_breakpoint = FindFirstBreakpointForMethod(m); |
| *existing_brkpt = first_breakpoint; |
| } |
| |
| if (first_breakpoint == nullptr) { |
| // There is no breakpoint on this method yet: we need to deoptimize. If this method is default, |
| // we deoptimize everything; otherwise we deoptimize only this method. We |
| // deoptimize with defaults because we do not know everywhere they are used. It is possible some |
| // of the copies could be missed. |
| // TODO Deoptimizing on default methods might not be necessary in all cases. |
| bool need_full_deoptimization = m->IsDefault(); |
| if (need_full_deoptimization) { |
| VLOG(jdwp) << "Need full deoptimization because of copying of method " |
| << ArtMethod::PrettyMethod(m); |
| return DeoptimizationRequest::kFullDeoptimization; |
| } else { |
| // We don't need to deoptimize if the method has not been compiled. |
| const bool is_compiled = m->HasAnyCompiledCode(); |
| if (is_compiled) { |
| VLOG(jdwp) << "Need selective deoptimization for compiled method " |
| << ArtMethod::PrettyMethod(m); |
| return DeoptimizationRequest::kSelectiveDeoptimization; |
| } else { |
| // Method is not compiled: we don't need to deoptimize. |
| VLOG(jdwp) << "No need for deoptimization for non-compiled method " |
| << ArtMethod::PrettyMethod(m); |
| return DeoptimizationRequest::kNothing; |
| } |
| } |
| } else { |
| // There is at least one breakpoint for this method: we don't need to deoptimize. |
| // Let's check that all breakpoints are configured the same way for deoptimization. |
| VLOG(jdwp) << "Breakpoint already set: no deoptimization is required"; |
| DeoptimizationRequest::Kind deoptimization_kind = first_breakpoint->GetDeoptimizationKind(); |
| if (kIsDebugBuild) { |
| ReaderMutexLock mu(self, *Locks::breakpoint_lock_); |
| SanityCheckExistingBreakpoints(m, deoptimization_kind); |
| } |
| return DeoptimizationRequest::kNothing; |
| } |
| } |
| |
| // Installs a breakpoint at the specified location. Also indicates through the deoptimization |
| // request if we need to deoptimize. |
| void Dbg::WatchLocation(const JDWP::JdwpLocation* location, DeoptimizationRequest* req) { |
| Thread* const self = Thread::Current(); |
| ArtMethod* m = FromMethodId(location->method_id); |
| DCHECK(m != nullptr) << "No method for method id " << location->method_id; |
| |
| const Breakpoint* existing_breakpoint = nullptr; |
| const DeoptimizationRequest::Kind deoptimization_kind = |
| GetRequiredDeoptimizationKind(self, m, &existing_breakpoint); |
| req->SetKind(deoptimization_kind); |
| if (deoptimization_kind == DeoptimizationRequest::kSelectiveDeoptimization) { |
| req->SetMethod(m); |
| } else { |
| CHECK(deoptimization_kind == DeoptimizationRequest::kNothing || |
| deoptimization_kind == DeoptimizationRequest::kFullDeoptimization); |
| req->SetMethod(nullptr); |
| } |
| |
| { |
| WriterMutexLock mu(self, *Locks::breakpoint_lock_); |
| // If there is at least one existing breakpoint on the same method, the new breakpoint |
| // must have the same deoptimization kind than the existing breakpoint(s). |
| DeoptimizationRequest::Kind breakpoint_deoptimization_kind; |
| if (existing_breakpoint != nullptr) { |
| breakpoint_deoptimization_kind = existing_breakpoint->GetDeoptimizationKind(); |
| } else { |
| breakpoint_deoptimization_kind = deoptimization_kind; |
| } |
| gBreakpoints.push_back(Breakpoint(m, location->dex_pc, breakpoint_deoptimization_kind)); |
| VLOG(jdwp) << "Set breakpoint #" << (gBreakpoints.size() - 1) << ": " |
| << gBreakpoints[gBreakpoints.size() - 1]; |
| } |
| } |
| |
| // Uninstalls a breakpoint at the specified location. Also indicates through the deoptimization |
| // request if we need to undeoptimize. |
| void Dbg::UnwatchLocation(const JDWP::JdwpLocation* location, DeoptimizationRequest* req) { |
| WriterMutexLock mu(Thread::Current(), *Locks::breakpoint_lock_); |
| ArtMethod* m = FromMethodId(location->method_id); |
| DCHECK(m != nullptr) << "No method for method id " << location->method_id; |
| DeoptimizationRequest::Kind deoptimization_kind = DeoptimizationRequest::kNothing; |
| for (size_t i = 0, e = gBreakpoints.size(); i < e; ++i) { |
| if (gBreakpoints[i].DexPc() == location->dex_pc && gBreakpoints[i].IsInMethod(m)) { |
| VLOG(jdwp) << "Removed breakpoint #" << i << ": " << gBreakpoints[i]; |
| deoptimization_kind = gBreakpoints[i].GetDeoptimizationKind(); |
| DCHECK_EQ(deoptimization_kind == DeoptimizationRequest::kSelectiveDeoptimization, |
| Runtime::Current()->GetInstrumentation()->IsDeoptimized(m)); |
| gBreakpoints.erase(gBreakpoints.begin() + i); |
| break; |
| } |
| } |
| const Breakpoint* const existing_breakpoint = FindFirstBreakpointForMethod(m); |
| if (existing_breakpoint == nullptr) { |
| // There is no more breakpoint on this method: we need to undeoptimize. |
| if (deoptimization_kind == DeoptimizationRequest::kFullDeoptimization) { |
| // This method required full deoptimization: we need to undeoptimize everything. |
| req->SetKind(DeoptimizationRequest::kFullUndeoptimization); |
| req->SetMethod(nullptr); |
| } else if (deoptimization_kind == DeoptimizationRequest::kSelectiveDeoptimization) { |
| // This method required selective deoptimization: we need to undeoptimize only that method. |
| req->SetKind(DeoptimizationRequest::kSelectiveUndeoptimization); |
| req->SetMethod(m); |
| } else { |
| // This method had no need for deoptimization: do nothing. |
| CHECK_EQ(deoptimization_kind, DeoptimizationRequest::kNothing); |
| req->SetKind(DeoptimizationRequest::kNothing); |
| req->SetMethod(nullptr); |
| } |
| } else { |
| // There is at least one breakpoint for this method: we don't need to undeoptimize. |
| req->SetKind(DeoptimizationRequest::kNothing); |
| req->SetMethod(nullptr); |
| if (kIsDebugBuild) { |
| SanityCheckExistingBreakpoints(m, deoptimization_kind); |
| } |
| } |
| } |
| |
| bool Dbg::IsForcedInterpreterNeededForCallingImpl(Thread* thread, ArtMethod* m) { |
| const SingleStepControl* const ssc = thread->GetSingleStepControl(); |
| if (ssc == nullptr) { |
| // If we are not single-stepping, then we don't have to force interpreter. |
| return false; |
| } |
| if (Runtime::Current()->GetInstrumentation()->InterpretOnly()) { |
| // If we are in interpreter only mode, then we don't have to force interpreter. |
| return false; |
| } |
| |
| if (!m->IsNative() && !m->IsProxyMethod()) { |
| // If we want to step into a method, then we have to force interpreter on that call. |
| if (ssc->GetStepDepth() == JDWP::SD_INTO) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| bool Dbg::IsForcedInterpreterNeededForResolutionImpl(Thread* thread, ArtMethod* m) { |
| instrumentation::Instrumentation* const instrumentation = |
| Runtime::Current()->GetInstrumentation(); |
| // If we are in interpreter only mode, then we don't have to force interpreter. |
| if (instrumentation->InterpretOnly()) { |
| return false; |
| } |
| // We can only interpret pure Java method. |
| if (m->IsNative() || m->IsProxyMethod()) { |
| return false; |
| } |
| const SingleStepControl* const ssc = thread->GetSingleStepControl(); |
| if (ssc != nullptr) { |
| // If we want to step into a method, then we have to force interpreter on that call. |
| if (ssc->GetStepDepth() == JDWP::SD_INTO) { |
| return true; |
| } |
| // If we are stepping out from a static initializer, by issuing a step |
| // in or step over, that was implicitly invoked by calling a static method, |
| // then we need to step into that method. Having a lower stack depth than |
| // the one the single step control has indicates that the step originates |
| // from the static initializer. |
| if (ssc->GetStepDepth() != JDWP::SD_OUT && |
| ssc->GetStackDepth() > GetStackDepth(thread)) { |
| return true; |
| } |
| } |
| // There are cases where we have to force interpreter on deoptimized methods, |
| // because in some cases the call will not be performed by invoking an entry |
| // point that has been replaced by the deoptimization, but instead by directly |
| // invoking the compiled code of the method, for example. |
| return instrumentation->IsDeoptimized(m); |
| } |
| |
| bool Dbg::IsForcedInstrumentationNeededForResolutionImpl(Thread* thread, ArtMethod* m) { |
| // The upcall can be null and in that case we don't need to do anything. |
| if (m == nullptr) { |
| return false; |
| } |
| instrumentation::Instrumentation* const instrumentation = |
| Runtime::Current()->GetInstrumentation(); |
| // If we are in interpreter only mode, then we don't have to force interpreter. |
| if (instrumentation->InterpretOnly()) { |
| return false; |
| } |
| // We can only interpret pure Java method. |
| if (m->IsNative() || m->IsProxyMethod()) { |
| return false; |
| } |
| const SingleStepControl* const ssc = thread->GetSingleStepControl(); |
| if (ssc != nullptr) { |
| // If we are stepping out from a static initializer, by issuing a step |
| // out, that was implicitly invoked by calling a static method, then we |
| // need to step into the caller of that method. Having a lower stack |
| // depth than the one the single step control has indicates that the |
| // step originates from the static initializer. |
| if (ssc->GetStepDepth() == JDWP::SD_OUT && |
| ssc->GetStackDepth() > GetStackDepth(thread)) { |
| return true; |
| } |
| } |
| // If we are returning from a static intializer, that was implicitly |
| // invoked by calling a static method and the caller is deoptimized, |
| // then we have to deoptimize the stack without forcing interpreter |
| // on the static method that was called originally. This problem can |
| // be solved easily by forcing instrumentation on the called method, |
| // because the instrumentation exit hook will recognise the need of |
| // stack deoptimization by calling IsForcedInterpreterNeededForUpcall. |
| return instrumentation->IsDeoptimized(m); |
| } |
| |
| bool Dbg::IsForcedInterpreterNeededForUpcallImpl(Thread* thread, ArtMethod* m) { |
| // The upcall can be null and in that case we don't need to do anything. |
| if (m == nullptr) { |
| return false; |
| } |
| instrumentation::Instrumentation* const instrumentation = |
| Runtime::Current()->GetInstrumentation(); |
| // If we are in interpreter only mode, then we don't have to force interpreter. |
| if (instrumentation->InterpretOnly()) { |
| return false; |
| } |
| // We can only interpret pure Java method. |
| if (m->IsNative() || m->IsProxyMethod()) { |
| return false; |
| } |
| const SingleStepControl* const ssc = thread->GetSingleStepControl(); |
| if (ssc != nullptr) { |
| // The debugger is not interested in what is happening under the level |
| // of the step, thus we only force interpreter when we are not below of |
| // the step. |
| if (ssc->GetStackDepth() >= GetStackDepth(thread)) { |
| return true; |
| } |
| } |
| if (thread->HasDebuggerShadowFrames()) { |
| // We need to deoptimize the stack for the exception handling flow so that |
| // we don't miss any deoptimization that should be done when there are |
| // debugger shadow frames. |
| return true; |
| } |
| // We have to require stack deoptimization if the upcall is deoptimized. |
| return instrumentation->IsDeoptimized(m); |
| } |
| |
| class NeedsDeoptimizationVisitor : public StackVisitor { |
| public: |
| explicit NeedsDeoptimizationVisitor(Thread* self) |
| REQUIRES_SHARED(Locks::mutator_lock_) |
| : StackVisitor(self, nullptr, StackVisitor::StackWalkKind::kIncludeInlinedFrames), |
| needs_deoptimization_(false) {} |
| |
| bool VisitFrame() OVERRIDE REQUIRES_SHARED(Locks::mutator_lock_) { |
| // The visitor is meant to be used when handling exception from compiled code only. |
| CHECK(!IsShadowFrame()) << "We only expect to visit compiled frame: " |
| << ArtMethod::PrettyMethod(GetMethod()); |
| ArtMethod* method = GetMethod(); |
| if (method == nullptr) { |
| // We reach an upcall and don't need to deoptimize this part of the stack (ManagedFragment) |
| // so we can stop the visit. |
| DCHECK(!needs_deoptimization_); |
| return false; |
| } |
| if (Runtime::Current()->GetInstrumentation()->InterpretOnly()) { |
| // We found a compiled frame in the stack but instrumentation is set to interpret |
| // everything: we need to deoptimize. |
| needs_deoptimization_ = true; |
| return false; |
| } |
| if (Runtime::Current()->GetInstrumentation()->IsDeoptimized(method)) { |
| // We found a deoptimized method in the stack. |
| needs_deoptimization_ = true; |
| return false; |
| } |
| ShadowFrame* frame = GetThread()->FindDebuggerShadowFrame(GetFrameId()); |
| if (frame != nullptr) { |
| // The debugger allocated a ShadowFrame to update a variable in the stack: we need to |
| // deoptimize the stack to execute (and deallocate) this frame. |
| needs_deoptimization_ = true; |
| return false; |
| } |
| return true; |
| } |
| |
| bool NeedsDeoptimization() const { |
| return needs_deoptimization_; |
| } |
| |
| private: |
| // Do we need to deoptimize the stack? |
| bool needs_deoptimization_; |
| |
| DISALLOW_COPY_AND_ASSIGN(NeedsDeoptimizationVisitor); |
| }; |
| |
| // Do we need to deoptimize the stack to handle an exception? |
| bool Dbg::IsForcedInterpreterNeededForExceptionImpl(Thread* thread) { |
| const SingleStepControl* const ssc = thread->GetSingleStepControl(); |
| if (ssc != nullptr) { |
| // We deopt to step into the catch handler. |
| return true; |
| } |
| // Deoptimization is required if at least one method in the stack needs it. However we |
| // skip frames that will be unwound (thus not executed). |
| NeedsDeoptimizationVisitor visitor(thread); |
| visitor.WalkStack(true); // includes upcall. |
| return visitor.NeedsDeoptimization(); |
| } |
| |
| // Scoped utility class to suspend a thread so that we may do tasks such as walk its stack. Doesn't |
| // cause suspension if the thread is the current thread. |
| class ScopedDebuggerThreadSuspension { |
| public: |
| ScopedDebuggerThreadSuspension(Thread* self, JDWP::ObjectId thread_id) |
| REQUIRES(!Locks::thread_list_lock_) |
| REQUIRES_SHARED(Locks::mutator_lock_) : |
| thread_(nullptr), |
| error_(JDWP::ERR_NONE), |
| self_suspend_(false), |
| other_suspend_(false) { |
| ScopedObjectAccessUnchecked soa(self); |
| thread_ = DecodeThread(soa, thread_id, &error_); |
| if (error_ == JDWP::ERR_NONE) { |
| if (thread_ == soa.Self()) { |
| self_suspend_ = true; |
| } else { |
| Thread* suspended_thread; |
| { |
| ScopedThreadSuspension sts(self, kWaitingForDebuggerSuspension); |
| jobject thread_peer = Dbg::GetObjectRegistry()->GetJObject(thread_id); |
| bool timed_out; |
| ThreadList* const thread_list = Runtime::Current()->GetThreadList(); |
| suspended_thread = thread_list->SuspendThreadByPeer(thread_peer, true, true, &timed_out); |
| } |
| if (suspended_thread == nullptr) { |
| // Thread terminated from under us while suspending. |
| error_ = JDWP::ERR_INVALID_THREAD; |
| } else { |
| CHECK_EQ(suspended_thread, thread_); |
| other_suspend_ = true; |
| } |
| } |
| } |
| } |
| |
| Thread* GetThread() const { |
| return thread_; |
| } |
| |
| JDWP::JdwpError GetError() const { |
| return error_; |
| } |
| |
| ~ScopedDebuggerThreadSuspension() { |
| if (other_suspend_) { |
| Runtime::Current()->GetThreadList()->Resume(thread_, true); |
| } |
| } |
| |
| private: |
| Thread* thread_; |
| JDWP::JdwpError error_; |
| bool self_suspend_; |
| bool other_suspend_; |
| }; |
| |
| JDWP::JdwpError Dbg::ConfigureStep(JDWP::ObjectId thread_id, JDWP::JdwpStepSize step_size, |
| JDWP::JdwpStepDepth step_depth) { |
| Thread* self = Thread::Current(); |
| ScopedDebuggerThreadSuspension sts(self, thread_id); |
| if (sts.GetError() != JDWP::ERR_NONE) { |
| return sts.GetError(); |
| } |
| |
| // Work out what ArtMethod* we're in, the current line number, and how deep the stack currently |
| // is for step-out. |
| struct SingleStepStackVisitor : public StackVisitor { |
| explicit SingleStepStackVisitor(Thread* thread) REQUIRES_SHARED(Locks::mutator_lock_) |
| : StackVisitor(thread, nullptr, StackVisitor::StackWalkKind::kIncludeInlinedFrames), |
| stack_depth(0), |
| method(nullptr), |
| line_number(-1) {} |
| |
| // TODO: Enable annotalysis. We know lock is held in constructor, but abstraction confuses |
| // annotalysis. |
| bool VisitFrame() NO_THREAD_SAFETY_ANALYSIS { |
| ArtMethod* m = GetMethod(); |
| if (!m->IsRuntimeMethod()) { |
| ++stack_depth; |
| if (method == nullptr) { |
| mirror::DexCache* dex_cache = m->GetDeclaringClass()->GetDexCache(); |
| method = m; |
| if (dex_cache != nullptr) { |
| const DexFile* dex_file = dex_cache->GetDexFile(); |
| line_number = annotations::GetLineNumFromPC(dex_file, m, GetDexPc()); |
| } |
| } |
| } |
| return true; |
| } |
| |
| int stack_depth; |
| ArtMethod* method; |
| int32_t line_number; |
| }; |
| |
| Thread* const thread = sts.GetThread(); |
| SingleStepStackVisitor visitor(thread); |
| visitor.WalkStack(); |
| |
| // Find the dex_pc values that correspond to the current line, for line-based single-stepping. |
| struct DebugCallbackContext { |
| DebugCallbackContext(SingleStepControl* single_step_control_cb, |
| int32_t line_number_cb, const DexFile::CodeItem* code_item) |
| : single_step_control_(single_step_control_cb), line_number_(line_number_cb), |
| code_item_(code_item), last_pc_valid(false), last_pc(0) { |
| } |
| |
| static bool Callback(void* raw_context, const DexFile::PositionInfo& entry) { |
| DebugCallbackContext* context = reinterpret_cast<DebugCallbackContext*>(raw_context); |
| if (static_cast<int32_t>(entry.line_) == context->line_number_) { |
| if (!context->last_pc_valid) { |
| // Everything from this address until the next line change is ours. |
| context->last_pc = entry.address_; |
| context->last_pc_valid = true; |
| } |
| // Otherwise, if we're already in a valid range for this line, |
| // just keep going (shouldn't really happen)... |
| } else if (context->last_pc_valid) { // and the line number is new |
| // Add everything from the last entry up until here to the set |
| for (uint32_t dex_pc = context->last_pc; dex_pc < entry.address_; ++dex_pc) { |
| context->single_step_control_->AddDexPc(dex_pc); |
| } |
| context->last_pc_valid = false; |
| } |
| return false; // There may be multiple entries for any given line. |
| } |
| |
| ~DebugCallbackContext() { |
| // If the line number was the last in the position table... |
| if (last_pc_valid) { |
| size_t end = code_item_->insns_size_in_code_units_; |
| for (uint32_t dex_pc = last_pc; dex_pc < end; ++dex_pc) { |
| single_step_control_->AddDexPc(dex_pc); |
| } |
| } |
| } |
| |
| SingleStepControl* const single_step_control_; |
| const int32_t line_number_; |
| const DexFile::CodeItem* const code_item_; |
| bool last_pc_valid; |
| uint32_t last_pc; |
| }; |
| |
| // Allocate single step. |
| SingleStepControl* single_step_control = |
| new (std::nothrow) SingleStepControl(step_size, step_depth, |
| visitor.stack_depth, visitor.method); |
| if (single_step_control == nullptr) { |
| LOG(ERROR) << "Failed to allocate SingleStepControl"; |
| return JDWP::ERR_OUT_OF_MEMORY; |
| } |
| |
| ArtMethod* m = single_step_control->GetMethod(); |
| const int32_t line_number = visitor.line_number; |
| // Note: if the thread is not running Java code (pure native thread), there is no "current" |
| // method on the stack (and no line number either). |
| if (m != nullptr && !m->IsNative()) { |
| const DexFile::CodeItem* const code_item = m->GetCodeItem(); |
| DebugCallbackContext context(single_step_control, line_number, code_item); |
| m->GetDexFile()->DecodeDebugPositionInfo(code_item, DebugCallbackContext::Callback, &context); |
| } |
| |
| // Activate single-step in the thread. |
| thread->ActivateSingleStepControl(single_step_control); |
| |
| if (VLOG_IS_ON(jdwp)) { |
| VLOG(jdwp) << "Single-step thread: " << *thread; |
| VLOG(jdwp) << "Single-step step size: " << single_step_control->GetStepSize(); |
| VLOG(jdwp) << "Single-step step depth: " << single_step_control->GetStepDepth(); |
| VLOG(jdwp) << "Single-step current method: " |
| << ArtMethod::PrettyMethod(single_step_control->GetMethod()); |
| VLOG(jdwp) << "Single-step current line: " << line_number; |
| VLOG(jdwp) << "Single-step current stack depth: " << single_step_control->GetStackDepth(); |
| VLOG(jdwp) << "Single-step dex_pc values:"; |
| for (uint32_t dex_pc : single_step_control->GetDexPcs()) { |
| VLOG(jdwp) << StringPrintf(" %#x", dex_pc); |
| } |
| } |
| |
| return JDWP::ERR_NONE; |
| } |
| |
| void Dbg::UnconfigureStep(JDWP::ObjectId thread_id) { |
| ScopedObjectAccessUnchecked soa(Thread::Current()); |
| JDWP::JdwpError error; |
| Thread* thread = DecodeThread(soa, thread_id, &error); |
| if (error == JDWP::ERR_NONE) { |
| thread->DeactivateSingleStepControl(); |
| } |
| } |
| |
| static char JdwpTagToShortyChar(JDWP::JdwpTag tag) { |
| switch (tag) { |
| default: |
| LOG(FATAL) << "unknown JDWP tag: " << PrintableChar(tag); |
| UNREACHABLE(); |
| |
| // Primitives. |
| case JDWP::JT_BYTE: return 'B'; |
| case JDWP::JT_CHAR: return 'C'; |
| case JDWP::JT_FLOAT: return 'F'; |
| case JDWP::JT_DOUBLE: return 'D'; |
| case JDWP::JT_INT: return 'I'; |
| case JDWP::JT_LONG: return 'J'; |
| case JDWP::JT_SHORT: return 'S'; |
| case JDWP::JT_VOID: return 'V'; |
| case JDWP::JT_BOOLEAN: return 'Z'; |
| |
| // Reference types. |
| case JDWP::JT_ARRAY: |
| case JDWP::JT_OBJECT: |
| case JDWP::JT_STRING: |
| case JDWP::JT_THREAD: |
| case JDWP::JT_THREAD_GROUP: |
| case JDWP::JT_CLASS_LOADER: |
| case JDWP::JT_CLASS_OBJECT: |
| return 'L'; |
| } |
| } |
| |
| JDWP::JdwpError Dbg::PrepareInvokeMethod(uint32_t request_id, JDWP::ObjectId thread_id, |
| JDWP::ObjectId object_id, JDWP::RefTypeId class_id, |
| JDWP::MethodId method_id, uint32_t arg_count, |
| uint64_t arg_values[], JDWP::JdwpTag* arg_types, |
| uint32_t options) { |
| Thread* const self = Thread::Current(); |
| CHECK_EQ(self, GetDebugThread()) << "This must be called by the JDWP thread"; |
| const bool resume_all_threads = ((options & JDWP::INVOKE_SINGLE_THREADED) == 0); |
| |
| ThreadList* thread_list = Runtime::Current()->GetThreadList(); |
| Thread* targetThread = nullptr; |
| { |
| ScopedObjectAccessUnchecked soa(self); |
| JDWP::JdwpError error; |
| targetThread = DecodeThread(soa, thread_id, &error); |
| if (error != JDWP::ERR_NONE) { |
| LOG(ERROR) << "InvokeMethod request for invalid thread id " << thread_id; |
| return error; |
| } |
| if (targetThread->GetInvokeReq() != nullptr) { |
| // Thread is already invoking a method on behalf of the debugger. |
| LOG(ERROR) << "InvokeMethod request for thread already invoking a method: " << *targetThread; |
| return JDWP::ERR_ALREADY_INVOKING; |
| } |
| if (!targetThread->IsReadyForDebugInvoke()) { |
| // Thread is not suspended by an event so it cannot invoke a method. |
| LOG(ERROR) << "InvokeMethod request for thread not stopped by event: " << *targetThread; |
| return JDWP::ERR_INVALID_THREAD; |
| } |
| |
| /* |
| * According to the JDWP specs, we are expected to resume all threads (or only the |
| * target thread) once. So if a thread has been suspended more than once (either by |
| * the debugger for an event or by the runtime for GC), it will remain suspended before |
| * the invoke is executed. This means the debugger is responsible to properly resume all |
| * the threads it has suspended so the target thread can execute the method. |
| * |
| * However, for compatibility reason with older versions of debuggers (like Eclipse), we |
| * fully resume all threads (by canceling *all* debugger suspensions) when the debugger |
| * wants us to resume all threads. This is to avoid ending up in deadlock situation. |
| * |
| * On the other hand, if we are asked to only resume the target thread, then we follow the |
| * JDWP specs by resuming that thread only once. This means the thread will remain suspended |
| * if it has been suspended more than once before the invoke (and again, this is the |
| * responsibility of the debugger to properly resume that thread before invoking a method). |
| */ |
| int suspend_count; |
| { |
| MutexLock mu2(soa.Self(), *Locks::thread_suspend_count_lock_); |
| suspend_count = targetThread->GetSuspendCount(); |
| } |
| if (suspend_count > 1 && resume_all_threads) { |
| // The target thread will remain suspended even after we resume it. Let's emit a warning |
| // to indicate the invoke won't be executed until the thread is resumed. |
| LOG(WARNING) << *targetThread << " suspended more than once (suspend count == " |
| << suspend_count << "). This thread will invoke the method only once " |
| << "it is fully resumed."; |
| } |
| |
| mirror::Object* receiver = gRegistry->Get<mirror::Object*>(object_id, &error); |
| if (error != JDWP::ERR_NONE) { |
| return JDWP::ERR_INVALID_OBJECT; |
| } |
| |
| gRegistry->Get<mirror::Object*>(thread_id, &error); |
| if (error != JDWP::ERR_NONE) { |
| return JDWP::ERR_INVALID_OBJECT; |
| } |
| |
| mirror::Class* c = DecodeClass(class_id, &error); |
| if (c == nullptr) { |
| return error; |
| } |
| |
| ArtMethod* m = FromMethodId(method_id); |
| if (m->IsStatic() != (receiver == nullptr)) { |
| return JDWP::ERR_INVALID_METHODID; |
| } |
| if (m->IsStatic()) { |
| if (m->GetDeclaringClass() != c) { |
| return JDWP::ERR_INVALID_METHODID; |
| } |
| } else { |
| if (!m->GetDeclaringClass()->IsAssignableFrom(c)) { |
| return JDWP::ERR_INVALID_METHODID; |
| } |
| } |
| |
| // Check the argument list matches the method. |
| uint32_t shorty_len = 0; |
| const char* shorty = m->GetShorty(&shorty_len); |
| if (shorty_len - 1 != arg_count) { |
| return JDWP::ERR_ILLEGAL_ARGUMENT; |
| } |
| |
| { |
| StackHandleScope<2> hs(soa.Self()); |
| HandleWrapper<mirror::Object> h_obj(hs.NewHandleWrapper(&receiver)); |
| HandleWrapper<mirror::Class> h_klass(hs.NewHandleWrapper(&c)); |
| const DexFile::TypeList* types = m->GetParameterTypeList(); |
| for (size_t i = 0; i < arg_count; ++i) { |
| if (shorty[i + 1] != JdwpTagToShortyChar(arg_types[i])) { |
| return JDWP::ERR_ILLEGAL_ARGUMENT; |
| } |
| |
| if (shorty[i + 1] == 'L') { |
| // Did we really get an argument of an appropriate reference type? |
| mirror::Class* parameter_type = |
| m->GetClassFromTypeIndex(types->GetTypeItem(i).type_idx_, true /* resolve */); |
| mirror::Object* argument = gRegistry->Get<mirror::Object*>(arg_values[i], &error); |
| if (error != JDWP::ERR_NONE) { |
| return JDWP::ERR_INVALID_OBJECT; |
| } |
| if (argument != nullptr && !argument->InstanceOf(parameter_type)) { |
| return JDWP::ERR_ILLEGAL_ARGUMENT; |
| } |
| |
| // Turn the on-the-wire ObjectId into a jobject. |
| jvalue& v = reinterpret_cast<jvalue&>(arg_values[i]); |
| v.l = gRegistry->GetJObject(arg_values[i]); |
| } |
| } |
| } |
| |
| // Allocates a DebugInvokeReq. |
| DebugInvokeReq* req = new (std::nothrow) DebugInvokeReq(request_id, thread_id, receiver, c, m, |
| options, arg_values, arg_count); |
| if (req == nullptr) { |
| LOG(ERROR) << "Failed to allocate DebugInvokeReq"; |
| return JDWP::ERR_OUT_OF_MEMORY; |
| } |
| |
| // Attaches the DebugInvokeReq to the target thread so it executes the method when |
| // it is resumed. Once the invocation completes, the target thread will delete it before |
| // suspending itself (see ThreadList::SuspendSelfForDebugger). |
| targetThread->SetDebugInvokeReq(req); |
| } |
| |
| // The fact that we've released the thread list lock is a bit risky --- if the thread goes |
| // away we're sitting high and dry -- but we must release this before the UndoDebuggerSuspensions |
| // call. |
| if (resume_all_threads) { |
| VLOG(jdwp) << " Resuming all threads"; |
| thread_list->UndoDebuggerSuspensions(); |
| } else { |
| VLOG(jdwp) << " Resuming event thread only"; |
| thread_list->Resume(targetThread, true); |
| } |
| |
| return JDWP::ERR_NONE; |
| } |
| |
| void Dbg::ExecuteMethod(DebugInvokeReq* pReq) { |
| Thread* const self = Thread::Current(); |
| CHECK_NE(self, GetDebugThread()) << "This must be called by the event thread"; |
| |
| ScopedObjectAccess soa(self); |
| |
| // We can be called while an exception is pending. We need |
| // to preserve that across the method invocation. |
| StackHandleScope<1> hs(soa.Self()); |
| Handle<mirror::Throwable> old_exception = hs.NewHandle(soa.Self()->GetException()); |
| soa.Self()->ClearException(); |
| |
| // Execute the method then sends reply to the debugger. |
| ExecuteMethodWithoutPendingException(soa, pReq); |
| |
| // If an exception was pending before the invoke, restore it now. |
| if (old_exception != nullptr) { |
| soa.Self()->SetException(old_exception.Get()); |
| } |
| } |
| |
| // Helper function: write a variable-width value into the output input buffer. |
| static void WriteValue(JDWP::ExpandBuf* pReply, int width, uint64_t value) { |
| switch (width) { |
| case 1: |
| expandBufAdd1(pReply, value); |
| break; |
| case 2: |
| expandBufAdd2BE(pReply, value); |
| break; |
| case 4: |
| expandBufAdd4BE(pReply, value); |
| break; |
| case 8: |
| expandBufAdd8BE(pReply, value); |
| break; |
| default: |
| LOG(FATAL) << width; |
| UNREACHABLE(); |
| } |
| } |
| |
| void Dbg::ExecuteMethodWithoutPendingException(ScopedObjectAccess& soa, DebugInvokeReq* pReq) { |
| soa.Self()->AssertNoPendingException(); |
| |
| // Translate the method through the vtable, unless the debugger wants to suppress it. |
| ArtMethod* m = pReq->method; |
| PointerSize image_pointer_size = Runtime::Current()->GetClassLinker()->GetImagePointerSize(); |
| if ((pReq->options & JDWP::INVOKE_NONVIRTUAL) == 0 && pReq->receiver.Read() != nullptr) { |
| ArtMethod* actual_method = |
| pReq->klass.Read()->FindVirtualMethodForVirtualOrInterface(m, image_pointer_size); |
| if (actual_method != m) { |
| VLOG(jdwp) << "ExecuteMethod translated " << ArtMethod::PrettyMethod(m) |
| << " to " << ArtMethod::PrettyMethod(actual_method); |
| m = actual_method; |
| } |
| } |
| VLOG(jdwp) << "ExecuteMethod " << ArtMethod::PrettyMethod(m) |
| << " receiver=" << pReq->receiver.Read() |
| << " arg_count=" << pReq->arg_count; |
| CHECK(m != nullptr); |
| |
| static_assert(sizeof(jvalue) == sizeof(uint64_t), "jvalue and uint64_t have different sizes."); |
| |
| // Invoke the method. |
| ScopedLocalRef<jobject> ref(soa.Env(), soa.AddLocalReference<jobject>(pReq->receiver.Read())); |
| JValue result = InvokeWithJValues(soa, ref.get(), jni::EncodeArtMethod(m), |
| reinterpret_cast<jvalue*>(pReq->arg_values.get())); |
| |
| // Prepare JDWP ids for the reply. |
| JDWP::JdwpTag result_tag = BasicTagFromDescriptor(m->GetShorty()); |
| const bool is_object_result = (result_tag == JDWP::JT_OBJECT); |
| StackHandleScope<3> hs(soa.Self()); |
| Handle<mirror::Object> object_result = hs.NewHandle(is_object_result ? result.GetL() : nullptr); |
| Handle<mirror::Throwable> exception = hs.NewHandle(soa.Self()->GetException()); |
| soa.Self()->ClearException(); |
| |
| if (!IsDebuggerActive()) { |
| // The debugger detached: we must not re-suspend threads. We also don't need to fill the reply |
| // because it won't be sent either. |
| return; |
| } |
| |
| JDWP::ObjectId exceptionObjectId = gRegistry->Add(exception); |
| uint64_t result_value = 0; |
| if (exceptionObjectId != 0) { |
| VLOG(jdwp) << " JDWP invocation returning with exception=" << exception.Get() |
| << " " << exception->Dump(); |
| result_value = 0; |
| } else if (is_object_result) { |
| /* if no exception was thrown, examine object result more closely */ |
| JDWP::JdwpTag new_tag = TagFromObject(soa, object_result.Get()); |
| if (new_tag != result_tag) { |
| VLOG(jdwp) << " JDWP promoted result from " << result_tag << " to " << new_tag; |
| result_tag = new_tag; |
| } |
| |
| // Register the object in the registry and reference its ObjectId. This ensures |
| // GC safety and prevents from accessing stale reference if the object is moved. |
| result_value = gRegistry->Add(object_result.Get()); |
| } else { |
| // Primitive result. |
| DCHECK(IsPrimitiveTag(result_tag)); |
| result_value = result.GetJ(); |
| } |
| const bool is_constructor = m->IsConstructor() && !m->IsStatic(); |
| if (is_constructor) { |
| // If we invoked a constructor (which actually returns void), return the receiver, |
| // unless we threw, in which case we return null. |
| DCHECK_EQ(JDWP::JT_VOID, result_tag); |
| if (exceptionObjectId == 0) { |
| if (m->GetDeclaringClass()->IsStringClass()) { |
| // For string constructors, the new string is remapped to the receiver (stored in ref). |
| Handle<mirror::Object> decoded_ref = hs.NewHandle(soa.Self()->DecodeJObject(ref.get())); |
| result_value = gRegistry->Add(decoded_ref); |
| result_tag = TagFromObject(soa, decoded_ref.Get()); |
| } else { |
| // TODO we could keep the receiver ObjectId in the DebugInvokeReq to avoid looking into the |
| // object registry. |
| result_value = GetObjectRegistry()->Add(pReq->receiver.Read()); |
| result_tag = TagFromObject(soa, pReq->receiver.Read()); |
| } |
| } else { |
| result_value = 0; |
| result_tag = JDWP::JT_OBJECT; |
| } |
| } |
| |
| // Suspend other threads if the invoke is not single-threaded. |
| if ((pReq->options & JDWP::INVOKE_SINGLE_THREADED) == 0) { |
| ScopedThreadSuspension sts(soa.Self(), kWaitingForDebuggerSuspension); |
| // Avoid a deadlock between GC and debugger where GC gets suspended during GC. b/25800335. |
| gc::ScopedGCCriticalSection gcs(soa.Self(), gc::kGcCauseDebugger, gc::kCollectorTypeDebugger); |
| VLOG(jdwp) << " Suspending all threads"; |
| Runtime::Current()->GetThreadList()->SuspendAllForDebugger(); |
| } |
| |
| VLOG(jdwp) << " --> returned " << result_tag |
| << StringPrintf(" %#" PRIx64 " (except=%#" PRIx64 ")", result_value, |
| exceptionObjectId); |
| |
| // Show detailed debug output. |
| if (result_tag == JDWP::JT_STRING && exceptionObjectId == 0) { |
| if (result_value != 0) { |
| if (VLOG_IS_ON(jdwp)) { |
| std::string result_string; |
| JDWP::JdwpError error = Dbg::StringToUtf8(result_value, &result_string); |
| CHECK_EQ(error, JDWP::ERR_NONE); |
| VLOG(jdwp) << " string '" << result_string << "'"; |
| } |
| } else { |
| VLOG(jdwp) << " string (null)"; |
| } |
| } |
| |
| // Attach the reply to DebugInvokeReq so it can be sent to the debugger when the event thread |
| // is ready to suspend. |
| BuildInvokeReply(pReq->reply, pReq->request_id, result_tag, result_value, exceptionObjectId); |
| } |
| |
| void Dbg::BuildInvokeReply(JDWP::ExpandBuf* pReply, uint32_t request_id, JDWP::JdwpTag result_tag, |
| uint64_t result_value, JDWP::ObjectId exception) { |
| // Make room for the JDWP header since we do not know the size of the reply yet. |
| JDWP::expandBufAddSpace(pReply, kJDWPHeaderLen); |
| |
| size_t width = GetTagWidth(result_tag); |
| JDWP::expandBufAdd1(pReply, result_tag); |
| if (width != 0) { |
| WriteValue(pReply, width, result_value); |
| } |
| JDWP::expandBufAdd1(pReply, JDWP::JT_OBJECT); |
| JDWP::expandBufAddObjectId(pReply, exception); |
| |
| // Now we know the size, we can complete the JDWP header. |
| uint8_t* buf = expandBufGetBuffer(pReply); |
| JDWP::Set4BE(buf + kJDWPHeaderSizeOffset, expandBufGetLength(pReply)); |
| JDWP::Set4BE(buf + kJDWPHeaderIdOffset, request_id); |
| JDWP::Set1(buf + kJDWPHeaderFlagsOffset, kJDWPFlagReply); // flags |
| JDWP::Set2BE(buf + kJDWPHeaderErrorCodeOffset, JDWP::ERR_NONE); |
| } |
| |
| void Dbg::FinishInvokeMethod(DebugInvokeReq* pReq) { |
| CHECK_NE(Thread::Current(), GetDebugThread()) << "This must be called by the event thread"; |
| |
| JDWP::ExpandBuf* const pReply = pReq->reply; |
| CHECK(pReply != nullptr) << "No reply attached to DebugInvokeReq"; |
| |
| // We need to prevent other threads (including JDWP thread) from interacting with the debugger |
| // while we send the reply but are not yet suspended. The JDWP token will be released just before |
| // we suspend ourself again (see ThreadList::SuspendSelfForDebugger). |
| gJdwpState->AcquireJdwpTokenForEvent(pReq->thread_id); |
| |
| // Send the reply unless the debugger detached before the completion of the method. |
| if (IsDebuggerActive()) { |
| const size_t replyDataLength = expandBufGetLength(pReply) - kJDWPHeaderLen; |
| VLOG(jdwp) << StringPrintf("REPLY INVOKE id=0x%06x (length=%zu)", |
| pReq->request_id, replyDataLength); |
| |
| gJdwpState->SendRequest(pReply); |
| } else { |
| VLOG(jdwp) << "Not sending invoke reply because debugger detached"; |
| } |
| } |
| |
| /* |
| * "request" contains a full JDWP packet, possibly with multiple chunks. We |
| * need to process each, accumulate the replies, and ship the whole thing |
| * back. |
| * |
| * Returns "true" if we have a reply. The reply buffer is newly allocated, |
| * and includes the chunk type/length, followed by the data. |
| * |
| * OLD-TODO: we currently assume that the request and reply include a single |
| * chunk. If this becomes inconvenient we will need to adapt. |
| */ |
| bool Dbg::DdmHandlePacket(JDWP::Request* request, uint8_t** pReplyBuf, int* pReplyLen) { |
| Thread* self = Thread::Current(); |
| JNIEnv* env = self->GetJniEnv(); |
| |
| uint32_t type = request->ReadUnsigned32("type"); |
| uint32_t length = request->ReadUnsigned32("length"); |
| |
| // Create a byte[] corresponding to 'request'. |
| size_t request_length = request->size(); |
| ScopedLocalRef<jbyteArray> dataArray(env, env->NewByteArray(request_length)); |
| if (dataArray.get() == nullptr) { |
| LOG(WARNING) << "byte[] allocation failed: " << request_length; |
| env->ExceptionClear(); |
| return false; |
| } |
| env->SetByteArrayRegion(dataArray.get(), 0, request_length, |
| reinterpret_cast<const jbyte*>(request->data())); |
| request->Skip(request_length); |
| |
| // Run through and find all chunks. [Currently just find the first.] |
| ScopedByteArrayRO contents(env, dataArray.get()); |
| if (length != request_length) { |
| LOG(WARNING) << StringPrintf("bad chunk found (len=%u pktLen=%zd)", length, request_length); |
| return false; |
| } |
| |
| // Call "private static Chunk dispatch(int type, byte[] data, int offset, int length)". |
| ScopedLocalRef<jobject> chunk(env, env->CallStaticObjectMethod(WellKnownClasses::org_apache_harmony_dalvik_ddmc_DdmServer, |
| WellKnownClasses::org_apache_harmony_dalvik_ddmc_DdmServer_dispatch, |
| type, dataArray.get(), 0, length)); |
| if (env->ExceptionCheck()) { |
| LOG(INFO) << StringPrintf("Exception thrown by dispatcher for 0x%08x", type); |
| env->ExceptionDescribe(); |
| env->ExceptionClear(); |
| return false; |
| } |
| |
| if (chunk.get() == nullptr) { |
| return false; |
| } |
| |
| /* |
| * Pull the pieces out of the chunk. We copy the results into a |
| * newly-allocated buffer that the caller can free. We don't want to |
| * continue using the Chunk object because nothing has a reference to it. |
| * |
| * We could avoid this by returning type/data/offset/length and having |
| * the caller be aware of the object lifetime issues, but that |
| * integrates the JDWP code more tightly into the rest of the runtime, and doesn't work |
| * if we have responses for multiple chunks. |
| * |
| * So we're pretty much stuck with copying data around multiple times. |
| */ |
| ScopedLocalRef<jbyteArray> replyData(env, reinterpret_cast<jbyteArray>(env->GetObjectField(chunk.get(), WellKnownClasses::org_apache_harmony_dalvik_ddmc_Chunk_data))); |
| jint offset = env->GetIntField(chunk.get(), WellKnownClasses::org_apache_harmony_dalvik_ddmc_Chunk_offset); |
| length = env->GetIntField(chunk.get(), WellKnownClasses::org_apache_harmony_dalvik_ddmc_Chunk_length); |
| type = env->GetIntField(chunk.get(), WellKnownClasses::org_apache_harmony_dalvik_ddmc_Chunk_type); |
| |
| VLOG(jdwp) << StringPrintf("DDM reply: type=0x%08x data=%p offset=%d length=%d", type, replyData.get(), offset, length); |
| if (length == 0 || replyData.get() == nullptr) { |
| return false; |
| } |
| |
| const int kChunkHdrLen = 8; |
| uint8_t* reply = new uint8_t[length + kChunkHdrLen]; |
| if (reply == nullptr) { |
| LOG(WARNING) << "malloc failed: " << (length + kChunkHdrLen); |
| return false; |
| } |
| JDWP::Set4BE(reply + 0, type); |
| JDWP::Set4BE(reply + 4, length); |
| env->GetByteArrayRegion(replyData.get(), offset, length, reinterpret_cast<jbyte*>(reply + kChunkHdrLen)); |
| |
| *pReplyBuf = reply; |
| *pReplyLen = length + kChunkHdrLen; |
| |
| VLOG(jdwp) << StringPrintf("dvmHandleDdm returning type=%.4s %p len=%d", reinterpret_cast<char*>(reply), reply, length); |
| return true; |
| } |
| |
| void Dbg::DdmBroadcast(bool connect) { |
| VLOG(jdwp) << "Broadcasting DDM " << (connect ? "connect" : "disconnect") << "..."; |
| |
| Thread* self = Thread::Current(); |
| if (self->GetState() != kRunnable) { |
| LOG(ERROR) << "DDM broadcast in thread state " << self->GetState(); |
| /* try anyway? */ |
| } |
| |
| JNIEnv* env = self->GetJniEnv(); |
| jint event = connect ? 1 /*DdmServer.CONNECTED*/ : 2 /*DdmServer.DISCONNECTED*/; |
| env->CallStaticVoidMethod(WellKnownClasses::org_apache_harmony_dalvik_ddmc_DdmServer, |
| WellKnownClasses::org_apache_harmony_dalvik_ddmc_DdmServer_broadcast, |
| event); |
| if (env->ExceptionCheck()) { |
| LOG(ERROR) << "DdmServer.broadcast " << event << " failed"; |
| env->ExceptionDescribe(); |
| env->ExceptionClear(); |
| } |
| } |
| |
| void Dbg::DdmConnected() { |
| Dbg::DdmBroadcast(true); |
| } |
| |
| void Dbg::DdmDisconnected() { |
| Dbg::DdmBroadcast(false); |
| gDdmThreadNotification = false; |
| } |
| |
| /* |
| * Send a notification when a thread starts, stops, or changes its name. |
| * |
| * Because we broadcast the full set of threads when the notifications are |
| * first enabled, it's possible for "thread" to be actively executing. |
| */ |
| void Dbg::DdmSendThreadNotification(Thread* t, uint32_t type) { |
| if (!gDdmThreadNotification) { |
| return; |
| } |
| |
| if (type == CHUNK_TYPE("THDE")) { |
| uint8_t buf[4]; |
| JDWP::Set4BE(&buf[0], t->GetThreadId()); |
| Dbg::DdmSendChunk(CHUNK_TYPE("THDE"), 4, buf); |
| } else { |
| CHECK(type == CHUNK_TYPE("THCR") || type == CHUNK_TYPE("THNM")) << type; |
| ScopedObjectAccessUnchecked soa(Thread::Current()); |
| StackHandleScope<1> hs(soa.Self()); |
| Handle<mirror::String> name(hs.NewHandle(t->GetThreadName())); |
| size_t char_count = (name != nullptr) ? name->GetLength() : 0; |
| const jchar* chars = (name != nullptr) ? name->GetValue() : nullptr; |
| bool is_compressed = (name != nullptr) ? name->IsCompressed() : false; |
| |
| std::vector<uint8_t> bytes; |
| JDWP::Append4BE(bytes, t->GetThreadId()); |
| if (is_compressed) { |
| const uint8_t* chars_compressed = name->GetValueCompressed(); |
| JDWP::AppendUtf16CompressedBE(bytes, chars_compressed, char_count); |
| } else { |
| JDWP::AppendUtf16BE(bytes, chars, char_count); |
| } |
| CHECK_EQ(bytes.size(), char_count*2 + sizeof(uint32_t)*2); |
| Dbg::DdmSendChunk(type, bytes); |
| } |
| } |
| |
| void Dbg::DdmSetThreadNotification(bool enable) { |
| // Enable/disable thread notifications. |
| gDdmThreadNotification = enable; |
| if (enable) { |
| // Suspend the VM then post thread start notifications for all threads. Threads attaching will |
| // see a suspension in progress and block until that ends. They then post their own start |
| // notification. |
| SuspendVM(); |
| std::list<Thread*> threads; |
| Thread* self = Thread::Current(); |
| { |
| MutexLock mu(self, *Locks::thread_list_lock_); |
| threads = Runtime::Current()->GetThreadList()->GetList(); |
| } |
| { |
| ScopedObjectAccess soa(self); |
| for (Thread* thread : threads) { |
| Dbg::DdmSendThreadNotification(thread, CHUNK_TYPE("THCR")); |
| } |
| } |
| ResumeVM(); |
| } |
| } |
| |
| void Dbg::PostThreadStartOrStop(Thread* t, uint32_t type) { |
| if (IsDebuggerActive()) { |
| gJdwpState->PostThreadChange(t, type == CHUNK_TYPE("THCR")); |
| } |
| Dbg::DdmSendThreadNotification(t, type); |
| } |
| |
| void Dbg::PostThreadStart(Thread* t) { |
| Dbg::PostThreadStartOrStop(t, CHUNK_TYPE("THCR")); |
| } |
| |
| void Dbg::PostThreadDeath(Thread* t) { |
| Dbg::PostThreadStartOrStop(t, CHUNK_TYPE("THDE")); |
| } |
| |
| void Dbg::DdmSendChunk(uint32_t type, size_t byte_count, const uint8_t* buf) { |
| CHECK(buf != nullptr); |
| iovec vec[1]; |
| vec[0].iov_base = reinterpret_cast<void*>(const_cast<uint8_t*>(buf)); |
| vec[0].iov_len = byte_count; |
| Dbg::DdmSendChunkV(type, vec, 1); |
| } |
| |
| void Dbg::DdmSendChunk(uint32_t type, const std::vector<uint8_t>& bytes) { |
| DdmSendChunk(type, bytes.size(), &bytes[0]); |
| } |
| |
| void Dbg::DdmSendChunkV(uint32_t type, const iovec* iov, int iov_count) { |
| if (gJdwpState == nullptr) { |
| VLOG(jdwp) << "Debugger thread not active, ignoring DDM send: " << type; |
| } else { |
| gJdwpState->DdmSendChunkV(type, iov, iov_count); |
| } |
| } |
| |
| JDWP::JdwpState* Dbg::GetJdwpState() { |
| return gJdwpState; |
| } |
| |
| int Dbg::DdmHandleHpifChunk(HpifWhen when) { |
| if (when == HPIF_WHEN_NOW) { |
| DdmSendHeapInfo(when); |
| return true; |
| } |
| |
| if (when != HPIF_WHEN_NEVER && when != HPIF_WHEN_NEXT_GC && when != HPIF_WHEN_EVERY_GC) { |
| LOG(ERROR) << "invalid HpifWhen value: " << static_cast<int>(when); |
| return false; |
| } |
| |
| gDdmHpifWhen = when; |
| return true; |
| } |
| |
| bool Dbg::DdmHandleHpsgNhsgChunk(Dbg::HpsgWhen when, Dbg::HpsgWhat what, bool native) { |
| if (when != HPSG_WHEN_NEVER && when != HPSG_WHEN_EVERY_GC) { |
| LOG(ERROR) << "invalid HpsgWhen value: " << static_cast<int>(when); |
| return false; |
| } |
| |
| if (what != HPSG_WHAT_MERGED_OBJECTS && what != HPSG_WHAT_DISTINCT_OBJECTS) { |
| LOG(ERROR) << "invalid HpsgWhat value: " << static_cast<int>(what); |
| return false; |
| } |
| |
| if (native) { |
| gDdmNhsgWhen = when; |
| gDdmNhsgWhat = what; |
| } else { |
| gDdmHpsgWhen = when; |
| gDdmHpsgWhat = what; |
| } |
| return true; |
| } |
| |
| void Dbg::DdmSendHeapInfo(HpifWhen reason) { |
| // If there's a one-shot 'when', reset it. |
| if (reason == gDdmHpifWhen) { |
| if (gDdmHpifWhen == HPIF_WHEN_NEXT_GC) { |
| gDdmHpifWhen = HPIF_WHEN_NEVER; |
| } |
| } |
| |
| /* |
| * Chunk HPIF (client --> server) |
| * |
| * Heap Info. General information about the heap, |
| * suitable for a summary display. |
| * |
| * [u4]: number of heaps |
| * |
| * For each heap: |
| * [u4]: heap ID |
| * [u8]: timestamp in ms since Unix epoch |
| * [u1]: capture reason (same as 'when' value from server) |
| * [u4]: max heap size in bytes (-Xmx) |
| * [u4]: current heap size in bytes |
| * [u4]: current number of bytes allocated |
| * [u4]: current number of objects allocated |
| */ |
| uint8_t heap_count = 1; |
| gc::Heap* heap = Runtime::Current()->GetHeap(); |
| std::vector<uint8_t> bytes; |
| JDWP::Append4BE(bytes, heap_count); |
| JDWP::Append4BE(bytes, 1); // Heap id (bogus; we only have one heap). |
| JDWP::Append8BE(bytes, MilliTime()); |
| JDWP::Append1BE(bytes, reason); |
| JDWP::Append4BE(bytes, heap->GetMaxMemory()); // Max allowed heap size in bytes. |
| JDWP::Append4BE(bytes, heap->GetTotalMemory()); // Current heap size in bytes. |
| JDWP::Append4BE(bytes, heap->GetBytesAllocated()); |
| JDWP::Append4BE(bytes, heap->GetObjectsAllocated()); |
| CHECK_EQ(bytes.size(), 4U + (heap_count * (4 + 8 + 1 + 4 + 4 + 4 + 4))); |
| Dbg::DdmSendChunk(CHUNK_TYPE("HPIF"), bytes); |
| } |
| |
| enum HpsgSolidity { |
| SOLIDITY_FREE = 0, |
| SOLIDITY_HARD = 1, |
| SOLIDITY_SOFT = 2, |
| SOLIDITY_WEAK = 3, |
| SOLIDITY_PHANTOM = 4, |
| SOLIDITY_FINALIZABLE = 5, |
| SOLIDITY_SWEEP = 6, |
| }; |
| |
| enum HpsgKind { |
| KIND_OBJECT = 0, |
| KIND_CLASS_OBJECT = 1, |
| KIND_ARRAY_1 = 2, |
| KIND_ARRAY_2 = 3, |
| KIND_ARRAY_4 = 4, |
| KIND_ARRAY_8 = 5, |
| KIND_UNKNOWN = 6, |
| KIND_NATIVE = 7, |
| }; |
| |
| #define HPSG_PARTIAL (1<<7) |
| #define HPSG_STATE(solidity, kind) ((uint8_t)((((kind) & 0x7) << 3) | ((solidity) & 0x7))) |
| |
| class HeapChunkContext { |
| public: |
| // Maximum chunk size. Obtain this from the formula: |
| // (((maximum_heap_size / ALLOCATION_UNIT_SIZE) + 255) / 256) * 2 |
| HeapChunkContext(bool merge, bool native) |
| : buf_(16384 - 16), |
| type_(0), |
| chunk_overhead_(0) { |
| Reset(); |
| if (native) { |
| type_ = CHUNK_TYPE("NHSG"); |
| } else { |
| type_ = merge ? CHUNK_TYPE("HPSG") : CHUNK_TYPE("HPSO"); |
| } |
| } |
| |
| ~HeapChunkContext() { |
| if (p_ > &buf_[0]) { |
| Flush(); |
| } |
| } |
| |
| void SetChunkOverhead(size_t chunk_overhead) { |
| chunk_overhead_ = chunk_overhead; |
| } |
| |
| void ResetStartOfNextChunk() { |
| startOfNextMemoryChunk_ = nullptr; |
| } |
| |
| void EnsureHeader(const void* chunk_ptr) { |
| if (!needHeader_) { |
| return; |
| } |
| |
| // Start a new HPSx chunk. |
| JDWP::Write4BE(&p_, 1); // Heap id (bogus; we only have one heap). |
| JDWP::Write1BE(&p_, 8); // Size of allocation unit, in bytes. |
| |
| JDWP::Write4BE(&p_, reinterpret_cast<uintptr_t>(chunk_ptr)); // virtual address of segment start. |
| JDWP::Write4BE(&p_, 0); // offset of this piece (relative to the virtual address). |
| // [u4]: length of piece, in allocation units |
| // We won't know this until we're done, so save the offset and stuff in a dummy value. |
| pieceLenField_ = p_; |
| JDWP::Write4BE(&p_, 0x55555555); |
| needHeader_ = false; |
| } |
| |
| void Flush() REQUIRES_SHARED(Locks::mutator_lock_) { |
| if (pieceLenField_ == nullptr) { |
| // Flush immediately post Reset (maybe back-to-back Flush). Ignore. |
| CHECK(needHeader_); |
| return; |
| } |
| // Patch the "length of piece" field. |
| CHECK_LE(&buf_[0], pieceLenField_); |
| CHECK_LE(pieceLenField_, p_); |
| JDWP::Set4BE(pieceLenField_, totalAllocationUnits_); |
| |
| Dbg::DdmSendChunk(type_, p_ - &buf_[0], &buf_[0]); |
| Reset(); |
| } |
| |
| static void HeapChunkJavaCallback(void* start, void* end, size_t used_bytes, void* arg) |
| REQUIRES_SHARED(Locks::heap_bitmap_lock_, |
| Locks::mutator_lock_) { |
| reinterpret_cast<HeapChunkContext*>(arg)->HeapChunkJavaCallback(start, end, used_bytes); |
| } |
| |
| static void HeapChunkNativeCallback(void* start, void* end, size_t used_bytes, void* arg) |
| REQUIRES_SHARED(Locks::mutator_lock_) { |
| reinterpret_cast<HeapChunkContext*>(arg)->HeapChunkNativeCallback(start, end, used_bytes); |
| } |
| |
| private: |
| enum { ALLOCATION_UNIT_SIZE = 8 }; |
| |
| void Reset() { |
| p_ = &buf_[0]; |
| ResetStartOfNextChunk(); |
| totalAllocationUnits_ = 0; |
| needHeader_ = true; |
| pieceLenField_ = nullptr; |
| } |
| |
| bool IsNative() const { |
| return type_ == CHUNK_TYPE("NHSG"); |
| } |
| |
| // Returns true if the object is not an empty chunk. |
| bool ProcessRecord(void* start, size_t used_bytes) REQUIRES_SHARED(Locks::mutator_lock_) { |
| // Note: heap call backs cannot manipulate the heap upon which they are crawling, care is taken |
| // in the following code not to allocate memory, by ensuring buf_ is of the correct size |
| if (used_bytes == 0) { |
| if (start == nullptr) { |
| // Reset for start of new heap. |
| startOfNextMemoryChunk_ = nullptr; |
| Flush(); |
| } |
| // Only process in use memory so that free region information |
| // also includes dlmalloc book keeping. |
| return false; |
| } |
| if (startOfNextMemoryChunk_ != nullptr) { |
| // Transmit any pending free memory. Native free memory of over kMaxFreeLen could be because |
| // of the use of mmaps, so don't report. If not free memory then start a new segment. |
| bool flush = true; |
| if (start > startOfNextMemoryChunk_) { |
| const size_t kMaxFreeLen = 2 * kPageSize; |
| void* free_start = startOfNextMemoryChunk_; |
| void* free_end = start; |
| const size_t free_len = |
| reinterpret_cast<uintptr_t>(free_end) - reinterpret_cast<uintptr_t>(free_start); |
| if (!IsNative() || free_len < kMaxFreeLen) { |
| AppendChunk(HPSG_STATE(SOLIDITY_FREE, 0), free_start, free_len, IsNative()); |
| flush = false; |
| } |
| } |
| if (flush) { |
| startOfNextMemoryChunk_ = nullptr; |
| Flush(); |
| } |
| } |
| return true; |
| } |
| |
| void HeapChunkNativeCallback(void* start, void* /*end*/, size_t used_bytes) |
| REQUIRES_SHARED(Locks::mutator_lock_) { |
| if (ProcessRecord(start, used_bytes)) { |
| uint8_t state = ExamineNativeObject(start); |
| AppendChunk(state, start, used_bytes + chunk_overhead_, true /*is_native*/); |
| startOfNextMemoryChunk_ = reinterpret_cast<char*>(start) + used_bytes + chunk_overhead_; |
| } |
| } |
| |
| void HeapChunkJavaCallback(void* start, void* /*end*/, size_t used_bytes) |
| REQUIRES_SHARED(Locks::heap_bitmap_lock_, Locks::mutator_lock_) { |
| if (ProcessRecord(start, used_bytes)) { |
| // Determine the type of this chunk. |
| // OLD-TODO: if context.merge, see if this chunk is different from the last chunk. |
| // If it's the same, we should combine them. |
| uint8_t state = ExamineJavaObject(reinterpret_cast<mirror::Object*>(start)); |
| AppendChunk(state, start, used_bytes + chunk_overhead_, false /*is_native*/); |
| startOfNextMemoryChunk_ = reinterpret_cast<char*>(start) + used_bytes + chunk_overhead_; |
| } |
| } |
| |
| void AppendChunk(uint8_t state, void* ptr, size_t length, bool is_native) |
| REQUIRES_SHARED(Locks::mutator_lock_) { |
| // Make sure there's enough room left in the buffer. |
| // We need to use two bytes for every fractional 256 allocation units used by the chunk plus |
| // 17 bytes for any header. |
| const size_t needed = ((RoundUp(length / ALLOCATION_UNIT_SIZE, 256) / 256) * 2) + 17; |
| size_t byte_left = &buf_.back() - p_; |
| if (byte_left < needed) { |
| if (is_native) { |
| // Cannot trigger memory allocation while walking native heap. |
| return; |
| } |
| Flush(); |
| } |
| |
| byte_left = &buf_.back() - p_; |
| if (byte_left < needed) { |
| LOG(WARNING) << "Chunk is too big to transmit (chunk_len=" << length << ", " |
| << needed << " bytes)"; |
| return; |
| } |
| EnsureHeader(ptr); |
| // Write out the chunk description. |
| length /= ALLOCATION_UNIT_SIZE; // Convert to allocation units. |
| totalAllocationUnits_ += length; |
| while (length > 256) { |
| *p_++ = state | HPSG_PARTIAL; |
| *p_++ = 255; // length - 1 |
| length -= 256; |
| } |
| *p_++ = state; |
| *p_++ = length - 1; |
| } |
| |
| uint8_t ExamineNativeObject(const void* p) REQUIRES_SHARED(Locks::mutator_lock_) { |
| return p == nullptr ? HPSG_STATE(SOLIDITY_FREE, 0) : HPSG_STATE(SOLIDITY_HARD, KIND_NATIVE); |
| } |
| |
| uint8_t ExamineJavaObject(mirror::Object* o) |
| REQUIRES_SHARED(Locks::mutator_lock_, Locks::heap_bitmap_lock_) { |
| if (o == nullptr) { |
| return HPSG_STATE(SOLIDITY_FREE, 0); |
| } |
| // It's an allocated chunk. Figure out what it is. |
| gc::Heap* heap = Runtime::Current()->GetHeap(); |
| if (!heap->IsLiveObjectLocked(o)) { |
| LOG(ERROR) << "Invalid object in managed heap: " << o; |
| return HPSG_STATE(SOLIDITY_HARD, KIND_NATIVE); |
| } |
| mirror::Class* c = o->GetClass(); |
| if (c == nullptr) { |
| // The object was probably just created but hasn't been initialized yet. |
| return HPSG_STATE(SOLIDITY_HARD, KIND_OBJECT); |
| } |
| if (!heap->IsValidObjectAddress(c)) { |
| LOG(ERROR) << "Invalid class for managed heap object: " << o << " " << c; |
| return HPSG_STATE(SOLIDITY_HARD, KIND_UNKNOWN); |
| } |
| if (c->GetClass() == nullptr) { |
| LOG(ERROR) << "Null class of class " << c << " for object " << o; |
| return HPSG_STATE(SOLIDITY_HARD, KIND_UNKNOWN); |
| } |
| if (c->IsClassClass()) { |
| return HPSG_STATE(SOLIDITY_HARD, KIND_CLASS_OBJECT); |
| } |
| if (c->IsArrayClass()) { |
| switch (c->GetComponentSize()) { |
| case 1: return HPSG_STATE(SOLIDITY_HARD, KIND_ARRAY_1); |
| case 2: return HPSG_STATE(SOLIDITY_HARD, KIND_ARRAY_2); |
| case 4: return HPSG_STATE(SOLIDITY_HARD, KIND_ARRAY_4); |
| case 8: return HPSG_STATE(SOLIDITY_HARD, KIND_ARRAY_8); |
| } |
| } |
| return HPSG_STATE(SOLIDITY_HARD, KIND_OBJECT); |
| } |
| |
| std::vector<uint8_t> buf_; |
| uint8_t* p_; |
| uint8_t* pieceLenField_; |
| void* startOfNextMemoryChunk_; |
| size_t totalAllocationUnits_; |
| uint32_t type_; |
| bool needHeader_; |
| size_t chunk_overhead_; |
| |
| DISALLOW_COPY_AND_ASSIGN(HeapChunkContext); |
| }; |
| |
| static void BumpPointerSpaceCallback(mirror::Object* obj, void* arg) |
| REQUIRES_SHARED(Locks::mutator_lock_) REQUIRES(Locks::heap_bitmap_lock_) { |
| const size_t size = RoundUp(obj->SizeOf(), kObjectAlignment); |
| HeapChunkContext::HeapChunkJavaCallback( |
| obj, reinterpret_cast<void*>(reinterpret_cast<uintptr_t>(obj) + size), size, arg); |
| } |
| |
| void Dbg::DdmSendHeapSegments(bool native) { |
| Dbg::HpsgWhen when = native ? gDdmNhsgWhen : gDdmHpsgWhen; |
| Dbg::HpsgWhat what = native ? gDdmNhsgWhat : gDdmHpsgWhat; |
| if (when == HPSG_WHEN_NEVER) { |
| return; |
| } |
| // Figure out what kind of chunks we'll be sending. |
| CHECK(what == HPSG_WHAT_MERGED_OBJECTS || what == HPSG_WHAT_DISTINCT_OBJECTS) |
| << static_cast<int>(what); |
| |
| // First, send a heap start chunk. |
| uint8_t heap_id[4]; |
| JDWP::Set4BE(&heap_id[0], 1); // Heap id (bogus; we only have one heap). |
| Dbg::DdmSendChunk(native ? CHUNK_TYPE("NHST") : CHUNK_TYPE("HPST"), sizeof(heap_id), heap_id); |
| Thread* self = Thread::Current(); |
| Locks::mutator_lock_->AssertSharedHeld(self); |
| |
| // Send a series of heap segment chunks. |
| HeapChunkContext context(what == HPSG_WHAT_MERGED_OBJECTS, native); |
| if (native) { |
| UNIMPLEMENTED(WARNING) << "Native heap inspection is not supported"; |
| } else { |
| gc::Heap* heap = Runtime::Current()->GetHeap(); |
| for (const auto& space : heap->GetContinuousSpaces()) { |
| if (space->IsDlMallocSpace()) { |
| ReaderMutexLock mu(self, *Locks::heap_bitmap_lock_); |
| // dlmalloc's chunk header is 2 * sizeof(size_t), but if the previous chunk is in use for an |
| // allocation then the first sizeof(size_t) may belong to it. |
| context.SetChunkOverhead(sizeof(size_t)); |
| space->AsDlMallocSpace()->Walk(HeapChunkContext::HeapChunkJavaCallback, &context); |
| } else if (space->IsRosAllocSpace()) { |
| context.SetChunkOverhead(0); |
| // Need to acquire the mutator lock before the heap bitmap lock with exclusive access since |
| // RosAlloc's internal logic doesn't know to release and reacquire the heap bitmap lock. |
| ScopedThreadSuspension sts(self, kSuspended); |
| ScopedSuspendAll ssa(__FUNCTION__); |
| ReaderMutexLock mu(self, *Locks::heap_bitmap_lock_); |
| space->AsRosAllocSpace()->Walk(HeapChunkContext::HeapChunkJavaCallback, &context); |
| } else if (space->IsBumpPointerSpace()) { |
| ReaderMutexLock mu(self, *Locks::heap_bitmap_lock_); |
| context.SetChunkOverhead(0); |
| space->AsBumpPointerSpace()->Walk(BumpPointerSpaceCallback, &context); |
| HeapChunkContext::HeapChunkJavaCallback(nullptr, nullptr, 0, &context); |
| } else if (space->IsRegionSpace()) { |
| heap->IncrementDisableMovingGC(self); |
| { |
| ScopedThreadSuspension sts(self, kSuspended); |
| ScopedSuspendAll ssa(__FUNCTION__); |
| ReaderMutexLock mu(self, *Locks::heap_bitmap_lock_); |
| context.SetChunkOverhead(0); |
| space->AsRegionSpace()->Walk(BumpPointerSpaceCallback, &context); |
| HeapChunkContext::HeapChunkJavaCallback(nullptr, nullptr, 0, &context); |
| } |
| heap->DecrementDisableMovingGC(self); |
| } else { |
| UNIMPLEMENTED(WARNING) << "Not counting objects in space " << *space; |
| } |
| context.ResetStartOfNextChunk(); |
| } |
| ReaderMutexLock mu(self, *Locks::heap_bitmap_lock_); |
| // Walk the large objects, these are not in the AllocSpace. |
| context.SetChunkOverhead(0); |
| heap->GetLargeObjectsSpace()->Walk(HeapChunkContext::HeapChunkJavaCallback, &context); |
| } |
| |
| // Finally, send a heap end chunk. |
| Dbg::DdmSendChunk(native ? CHUNK_TYPE("NHEN") : CHUNK_TYPE("HPEN"), sizeof(heap_id), heap_id); |
| } |
| |
| void Dbg::SetAllocTrackingEnabled(bool enable) { |
| gc::AllocRecordObjectMap::SetAllocTrackingEnabled(enable); |
| } |
| |
| void Dbg::DumpRecentAllocations() { |
| ScopedObjectAccess soa(Thread::Current()); |
| MutexLock mu(soa.Self(), *Locks::alloc_tracker_lock_); |
| if (!Runtime::Current()->GetHeap()->IsAllocTrackingEnabled()) { |
| LOG(INFO) << "Not recording tracked allocations"; |
| return; |
| } |
| gc::AllocRecordObjectMap* records = Runtime::Current()->GetHeap()->GetAllocationRecords(); |
| CHECK(records != nullptr); |
| |
| const uint16_t capped_count = CappedAllocRecordCount(records->GetRecentAllocationSize()); |
| uint16_t count = capped_count; |
| |
| LOG(INFO) << "Tracked allocations, (count=" << count << ")"; |
| for (auto it = records->RBegin(), end = records->REnd(); |
| count > 0 && it != end; count--, it++) { |
| const gc::AllocRecord* record = &it->second; |
| |
| LOG(INFO) << StringPrintf(" Thread %-2d %6zd bytes ", record->GetTid(), record->ByteCount()) |
| << mirror::Class::PrettyClass(record->GetClass()); |
| |
| for (size_t stack_frame = 0, depth = record->GetDepth(); stack_frame < depth; ++stack_frame) { |
| const gc::AllocRecordStackTraceElement& stack_element = record->StackElement(stack_frame); |
| ArtMethod* m = stack_element.GetMethod(); |
| LOG(INFO) << " " << ArtMethod::PrettyMethod(m) << " line " |
| << stack_element.ComputeLineNumber(); |
| } |
| |
| // pause periodically to help logcat catch up |
| if ((count % 5) == 0) { |
| usleep(40000); |
| } |
| } |
| } |
| |
| class StringTable { |
| public: |
| StringTable() { |
| } |
| |
| void Add(const std::string& str) { |
| table_.insert(str); |
| } |
| |
| void Add(const char* str) { |
| table_.insert(str); |
| } |
| |
| size_t IndexOf(const char* s) const { |
| auto it = table_.find(s); |
| if (it == table_.end()) { |
| LOG(FATAL) << "IndexOf(\"" << s << "\") failed"; |
| } |
| return std::distance(table_.begin(), it); |
| } |
| |
| size_t Size() const { |
| return table_.size(); |
| } |
| |
| void WriteTo(std::vector<uint8_t>& bytes) const { |
| for (const std::string& str : table_) { |
| const char* s = str.c_str(); |
| size_t s_len = CountModifiedUtf8Chars(s); |
| std::unique_ptr<uint16_t[]> s_utf16(new uint16_t[s_len]); |
| ConvertModifiedUtf8ToUtf16(s_utf16.get(), s); |
| JDWP::AppendUtf16BE(bytes, s_utf16.get(), s_len); |
| } |
| } |
| |
| private: |
| std::set<std::string> table_; |
| DISALLOW_COPY_AND_ASSIGN(StringTable); |
| }; |
| |
| static const char* GetMethodSourceFile(ArtMethod* method) |
| REQUIRES_SHARED(Locks::mutator_lock_) { |
| DCHECK(method != nullptr); |
| const char* source_file = method->GetDeclaringClassSourceFile(); |
| return (source_file != nullptr) ? source_file : ""; |
| } |
| |
| /* |
| * The data we send to DDMS contains everything we have recorded. |
| * |
| * Message header (all values big-endian): |
| * (1b) message header len (to allow future expansion); includes itself |
| * (1b) entry header len |
| * (1b) stack frame len |
| * (2b) number of entries |
| * (4b) offset to string table from start of message |
| * (2b) number of class name strings |
| * (2b) number of method name strings |
| * (2b) number of source file name strings |
| * For each entry: |
| * (4b) total allocation size |
| * (2b) thread id |
| * (2b) allocated object's class name index |
| * (1b) stack depth |
| * For each stack frame: |
| * (2b) method's class name |
| * (2b) method name |
| * (2b) method source file |
| * (2b) line number, clipped to 32767; -2 if native; -1 if no source |
| * (xb) class name strings |
| * (xb) method name strings |
| * (xb) source file strings |
| * |
| * As with other DDM traffic, strings are sent as a 4-byte length |
| * followed by UTF-16 data. |
| * |
| * We send up 16-bit unsigned indexes into string tables. In theory there |
| * can be (kMaxAllocRecordStackDepth * alloc_record_max_) unique strings in |
| * each table, but in practice there should be far fewer. |
| * |
| * The chief reason for using a string table here is to keep the size of |
| * the DDMS message to a minimum. This is partly to make the protocol |
| * efficient, but also because we have to form the whole thing up all at |
| * once in a memory buffer. |
| * |
| * We use separate string tables for class names, method names, and source |
| * files to keep the indexes small. There will generally be no overlap |
| * between the contents of these tables. |
| */ |
| jbyteArray Dbg::GetRecentAllocations() { |
| if ((false)) { |
| DumpRecentAllocations(); |
| } |
| |
| Thread* self = Thread::Current(); |
| std::vector<uint8_t> bytes; |
| { |
| MutexLock mu(self, *Locks::alloc_tracker_lock_); |
| gc::AllocRecordObjectMap* records = Runtime::Current()->GetHeap()->GetAllocationRecords(); |
| // In case this method is called when allocation tracker is disabled, |
| // we should still send some data back. |
| gc::AllocRecordObjectMap dummy; |
| if (records == nullptr) { |
| CHECK(!Runtime::Current()->GetHeap()->IsAllocTrackingEnabled()); |
| records = &dummy; |
| } |
| // We don't need to wait on the condition variable records->new_record_condition_, because this |
| // function only reads the class objects, which are already marked so it doesn't change their |
| // reachability. |
| |
| // |
| // Part 1: generate string tables. |
| // |
| StringTable class_names; |
| StringTable method_names; |
| StringTable filenames; |
| |
| const uint16_t capped_count = CappedAllocRecordCount(records->GetRecentAllocationSize()); |
| uint16_t count = capped_count; |
| for (auto it = records->RBegin(), end = records->REnd(); |
| count > 0 && it != end; count--, it++) { |
| const gc::AllocRecord* record = &it->second; |
| std::string temp; |
| class_names.Add(record->GetClassDescriptor(&temp)); |
| for (size_t i = 0, depth = record->GetDepth(); i < depth; i++) { |
| ArtMethod* m = record->StackElement(i).GetMethod(); |
| class_names.Add(m->GetDeclaringClassDescriptor()); |
| method_names.Add(m->GetName()); |
| filenames.Add(GetMethodSourceFile(m)); |
| } |
| } |
| |
| LOG(INFO) << "recent allocation records: " << capped_count; |
| LOG(INFO) << "allocation records all objects: " << records->Size(); |
| |
| // |
| // Part 2: Generate the output and store it in the buffer. |
| // |
| |
| // (1b) message header len (to allow future expansion); includes itself |
| // (1b) entry header len |
| // (1b) stack frame len |
| const int kMessageHeaderLen = 15; |
| const int kEntryHeaderLen = 9; |
| const int kStackFrameLen = 8; |
| JDWP::Append1BE(bytes, kMessageHeaderLen); |
| JDWP::Append1BE(bytes, kEntryHeaderLen); |
| JDWP::Append1BE(bytes, kStackFrameLen); |
| |
| // (2b) number of entries |
| // (4b) offset to string table from start of message |
| // (2b) number of class name strings |
| // (2b) number of method name strings |
| // (2b) number of source file name strings |
| JDWP::Append2BE(bytes, capped_count); |
| size_t string_table_offset = bytes.size(); |
| JDWP::Append4BE(bytes, 0); // We'll patch this later... |
| JDWP::Append2BE(bytes, class_names.Size()); |
| JDWP::Append2BE(bytes, method_names.Size()); |
| JDWP::Append2BE(bytes, filenames.Size()); |
| |
| std::string temp; |
| count = capped_count; |
| // The last "count" number of allocation records in "records" are the most recent "count" number |
| // of allocations. Reverse iterate to get them. The most recent allocation is sent first. |
| for (auto it = records->RBegin(), end = records->REnd(); |
| count > 0 && it != end; count--, it++) { |
| // For each entry: |
| // (4b) total allocation size |
| // (2b) thread id |
| // (2b) allocated object's class name index |
| // (1b) stack depth |
| const gc::AllocRecord* record = &it->second; |
| size_t stack_depth = record->GetDepth(); |
| size_t allocated_object_class_name_index = |
| class_names.IndexOf(record->GetClassDescriptor(&temp)); |
| JDWP::Append4BE(bytes, record->ByteCount()); |
| JDWP::Append2BE(bytes, static_cast<uint16_t>(record->GetTid())); |
| JDWP::Append2BE(bytes, allocated_object_class_name_index); |
| JDWP::Append1BE(bytes, stack_depth); |
| |
| for (size_t stack_frame = 0; stack_frame < stack_depth; ++stack_frame) { |
| // For each stack frame: |
| // (2b) method's class name |
| // (2b) method name |
| // (2b) method source file |
| // (2b) line number, clipped to 32767; -2 if native; -1 if no source |
| ArtMethod* m = record->StackElement(stack_frame).GetMethod(); |
| size_t class_name_index = class_names.IndexOf(m->GetDeclaringClassDescriptor()); |
| size_t method_name_index = method_names.IndexOf(m->GetName()); |
| size_t file_name_index = filenames.IndexOf(GetMethodSourceFile(m)); |
| JDWP::Append2BE(bytes, class_name_index); |
| JDWP::Append2BE(bytes, method_name_index); |
| JDWP::Append2BE(bytes, file_name_index); |
| JDWP::Append2BE(bytes, record->StackElement(stack_frame).ComputeLineNumber()); |
| } |
| } |
| |
| // (xb) class name strings |
| // (xb) method name strings |
| // (xb) source file strings |
| JDWP::Set4BE(&bytes[string_table_offset], bytes.size()); |
| class_names.WriteTo(bytes); |
| method_names.WriteTo(bytes); |
| filenames.WriteTo(bytes); |
| } |
| JNIEnv* env = self->GetJniEnv(); |
| jbyteArray result = env->NewByteArray(bytes.size()); |
| if (result != nullptr) { |
| env->SetByteArrayRegion(result, 0, bytes.size(), reinterpret_cast<const jbyte*>(&bytes[0])); |
| } |
| return result; |
| } |
| |
| ArtMethod* DeoptimizationRequest::Method() const { |
| return jni::DecodeArtMethod(method_); |
| } |
| |
| void DeoptimizationRequest::SetMethod(ArtMethod* m) { |
| method_ = jni::EncodeArtMethod(m); |
| } |
| |
| void Dbg::VisitRoots(RootVisitor* visitor) { |
| // Visit breakpoint roots, used to prevent unloading of methods with breakpoints. |
| ReaderMutexLock mu(Thread::Current(), *Locks::breakpoint_lock_); |
| BufferedRootVisitor<128> root_visitor(visitor, RootInfo(kRootVMInternal)); |
| for (Breakpoint& breakpoint : gBreakpoints) { |
| breakpoint.Method()->VisitRoots(root_visitor, kRuntimePointerSize); |
| } |
| } |
| |
| void Dbg::DbgThreadLifecycleCallback::ThreadStart(Thread* self) { |
| Dbg::PostThreadStart(self); |
| } |
| |
| void Dbg::DbgThreadLifecycleCallback::ThreadDeath(Thread* self) { |
| Dbg::PostThreadDeath(self); |
| } |
| |
| void Dbg::DbgClassLoadCallback::ClassLoad(Handle<mirror::Class> klass ATTRIBUTE_UNUSED) { |
| // Ignore ClassLoad; |
| } |
| void Dbg::DbgClassLoadCallback::ClassPrepare(Handle<mirror::Class> temp_klass ATTRIBUTE_UNUSED, |
| Handle<mirror::Class> klass) { |
| Dbg::PostClassPrepare(klass.Get()); |
| } |
| |
| } // namespace art |