diff options
Diffstat (limited to 'runtime/debugger.cc')
| -rw-r--r-- | runtime/debugger.cc | 4263 |
1 files changed, 71 insertions, 4192 deletions
diff --git a/runtime/debugger.cc b/runtime/debugger.cc index c5b111f804..f218c4eaec 100644 --- a/runtime/debugger.cc +++ b/runtime/debugger.cc @@ -23,12 +23,16 @@ #include <set> #include <vector> +#include "android-base/macros.h" #include "android-base/stringprintf.h" #include "arch/context.h" #include "art_field-inl.h" #include "art_method-inl.h" +#include "base/endian_utils.h" #include "base/enums.h" +#include "base/logging.h" +#include "base/memory_tool.h" #include "base/safe_map.h" #include "base/strlcpy.h" #include "base/time_utils.h" @@ -49,8 +53,7 @@ #include "gc/space/large_object_space.h" #include "gc/space/space-inl.h" #include "handle_scope-inl.h" -#include "jdwp/jdwp_priv.h" -#include "jdwp/object_registry.h" +#include "instrumentation.h" #include "jni/jni_internal.h" #include "jvalue-inl.h" #include "mirror/array-alloc-inl.h" @@ -68,19 +71,22 @@ #include "oat_file.h" #include "obj_ptr-inl.h" #include "reflection.h" +#include "reflective_handle.h" +#include "reflective_handle_scope-inl.h" #include "runtime-inl.h" +#include "runtime_callbacks.h" #include "scoped_thread_state_change-inl.h" +#include "scoped_thread_state_change.h" #include "stack.h" +#include "thread.h" #include "thread_list.h" +#include "thread_pool.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; @@ -90,222 +96,9 @@ static uint16_t CappedAllocRecordCount(size_t alloc_record_count) { return alloc_record_count; } -class Breakpoint : public ValueObject { - public: - Breakpoint(ArtMethod* method, uint32_t dex_pc, DeoptimizationRequest::Kind deoptimization_kind) - : method_(method->GetCanonicalMethod(kRuntimePointerSize)), - 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_ == m->GetCanonicalMethod(kRuntimePointerSize); - } - - 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, - Handle<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.Get(), method, 0, Dbg::kMethodEntry, nullptr); - } - } - - void MethodExited(Thread* thread, - Handle<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.Get(), method, dex_pc, events, &return_value); - } - - void MethodUnwind(Thread* thread ATTRIBUTE_UNUSED, - Handle<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, - Handle<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.Get(), method, new_dex_pc, events, nullptr); - } - } - - void FieldRead(Thread* thread ATTRIBUTE_UNUSED, - Handle<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.Get(), field); - } - - void FieldWritten(Thread* thread ATTRIBUTE_UNUSED, - Handle<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.Get(), field, &field_value); - } - - void ExceptionThrown(Thread* thread ATTRIBUTE_UNUSED, - Handle<mirror::Throwable> exception_object) - override REQUIRES_SHARED(Locks::mutator_lock_) { - Dbg::PostException(exception_object.Get()); - } - - // 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; - } - - // TODO Might be worth it to post ExceptionCatch event. - void ExceptionHandled(Thread* thread ATTRIBUTE_UNUSED, - Handle<mirror::Throwable> throwable ATTRIBUTE_UNUSED) override { - LOG(ERROR) << "Unexpected exception handled event in debugger"; - } - - // TODO Might be worth it to implement this. - void WatchedFramePop(Thread* thread ATTRIBUTE_UNUSED, - const ShadowFrame& frame ATTRIBUTE_UNUSED) override { - LOG(ERROR) << "Unexpected WatchedFramePop event in debugger"; - } - - private: - static bool IsReturn(ArtMethod* method, uint32_t dex_pc) REQUIRES_SHARED(Locks::mutator_lock_) { - return method->DexInstructions().InstructionAt(dex_pc).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. @@ -315,287 +108,7 @@ 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; -DebuggerActiveMethodInspectionCallback Dbg::gDebugActiveCallback; -DebuggerDdmCallback Dbg::gDebugDdmCallback; -InternalDebuggerControlCallback Dbg::gDebuggerControlCallback; - -// 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_; - -void DebuggerDdmCallback::DdmPublishChunk(uint32_t type, const ArrayRef<const uint8_t>& data) { - if (gJdwpState == nullptr) { - VLOG(jdwp) << "Debugger thread not active, ignoring DDM send: " << type; - } else { - iovec vec[1]; - vec[0].iov_base = reinterpret_cast<void*>(const_cast<uint8_t*>(data.data())); - vec[0].iov_len = data.size(); - gJdwpState->DdmSendChunkV(type, vec, 1); - } -} - -bool DebuggerActiveMethodInspectionCallback::IsMethodBeingInspected(ArtMethod* m ATTRIBUTE_UNUSED) { - return Dbg::IsDebuggerActive(); -} - -bool DebuggerActiveMethodInspectionCallback::IsMethodSafeToJit(ArtMethod* m) { - return !Dbg::MethodHasAnyBreakpoints(m); -} - -bool DebuggerActiveMethodInspectionCallback::MethodNeedsDebugVersion( - ArtMethod* m ATTRIBUTE_UNUSED) { - return Dbg::IsDebuggerActive(); -} - -void InternalDebuggerControlCallback::StartDebugger() { - // Release the mutator lock. - ScopedThreadStateChange stsc(art::Thread::Current(), kNative); - Dbg::StartJdwp(); -} - -void InternalDebuggerControlCallback::StopDebugger() { - Dbg::StopJdwp(); -} - -bool InternalDebuggerControlCallback::IsDebuggerConfigured() { - return Dbg::IsJdwpConfigured(); -} - -// 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 ObjPtr<mirror::Array> DecodeNonNullArray(JDWP::RefTypeId id, JDWP::JdwpError* error) - REQUIRES_SHARED(Locks::mutator_lock_) { - ObjPtr<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 ObjPtr<mirror::Class> DecodeClass(JDWP::RefTypeId id, JDWP::JdwpError* error) - REQUIRES_SHARED(Locks::mutator_lock_) { - ObjPtr<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_) { - ObjPtr<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(ObjPtr<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, ObjPtr<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; - - { - // Setup the Ddm listener - ScopedObjectAccess soa(Thread::Current()); - Runtime::Current()->GetRuntimeCallbacks()->AddDdmCallback(&gDebugDdmCallback); - } - - // 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) { @@ -623,2967 +136,8 @@ 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. - ScopedSuspendAll ssa(__FUNCTION__); - if (!runtime->IsJavaDebuggable() && - !runtime->GetInstrumentation()->IsForcedInterpretOnly() && - !runtime->IsNativeDebuggable()) { - runtime->DeoptimizeBootImage(); - } - - if (RequiresDeoptimization()) { - runtime->GetInstrumentation()->EnableDeoptimization(); - } - instrumentation_events_ = 0; - Runtime::DoAndMaybeSwitchInterpreter([=](){ gDebuggerActive = true; }); - Runtime::Current()->GetRuntimeCallbacks()->AddMethodInspectionCallback(&gDebugActiveCallback); - 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); - } - Runtime::DoAndMaybeSwitchInterpreter([=](){ gDebuggerActive = false; }); - Runtime::Current()->GetRuntimeCallbacks()->RemoveMethodInspectionCallback( - &gDebugActiveCallback); - } - } - - { - 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; - Runtime::Current()->GetRuntimeCallbacks()->AddDebuggerControlCallback(&gDebuggerControlCallback); -} - -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; - ObjPtr<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.Ptr()); // This is only used for debugging output anyway. - } - return GetClassName(o->AsClass()); -} - -std::string Dbg::GetClassName(ObjPtr<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; - ObjPtr<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; - ObjPtr<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; - ObjPtr<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; - ObjPtr<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; - Thread* self = Thread::Current(); - StackHandleScope<1u> hs(self); - Handle<mirror::Object> o = hs.NewHandle(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. - CHECK_EQ(self->GetState(), kRunnable); - - MonitorInfo monitor_info; - { - ScopedThreadSuspension sts(self, kSuspended); - ScopedSuspendAll ssa(__FUNCTION__); - monitor_info = MonitorInfo(o.Get()); - } - 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() override NO_THREAD_SAFETY_ANALYSIS { - if (!GetMethod()->IsRuntimeMethod()) { - Monitor::VisitLocks(this, AppendOwnedMonitors, this); - ++current_stack_depth; - } - return true; - } - - static void AppendOwnedMonitors(ObjPtr<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; - } - ObjPtr<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(/* clear_soft_references= */ false, gc::GcCause::kGcCauseDebugger); - 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(/* clear_soft_references= */ false, gc::GcCause::kGcCauseDebugger); - 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), - /* use_is_assignable_from= */ false, - 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(/* clear_soft_references= */ false, gc::GcCause::kGcCauseDebugger); - 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; - ObjPtr<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; - ObjPtr<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; - ObjPtr<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::GetSourceDebugExtension(JDWP::RefTypeId class_id, - std::string* extension_data) { - JDWP::JdwpError error; - ObjPtr<mirror::Class> c = DecodeClass(class_id, &error); - if (c == nullptr) { - return error; - } - StackHandleScope<1> hs(Thread::Current()); - Handle<mirror::Class> klass(hs.NewHandle(c)); - const char* data = annotations::GetSourceDebugExtension(klass); - if (data == nullptr) { - return JDWP::ERR_ABSENT_INFORMATION; - } - *extension_data = data; - return JDWP::ERR_NONE; -} - -JDWP::JdwpError Dbg::GetSourceFile(JDWP::RefTypeId class_id, std::string* result) { - JDWP::JdwpError error; - ObjPtr<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; - UNREACHABLE(); - } -} - -JDWP::JdwpError Dbg::GetArrayLength(JDWP::ObjectId array_id, int32_t* length) { - JDWP::JdwpError error; - ObjPtr<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; - ObjPtr<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()); - ObjPtr<mirror::ObjectArray<mirror::Object>> oa = a->AsObjectArray<mirror::Object>(); - for (int i = 0; i < count; ++i) { - ObjPtr<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(ObjPtr<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; - ObjPtr<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 { - ObjPtr<mirror::ObjectArray<mirror::Object>> oa = dst->AsObjectArray<mirror::Object>(); - for (int i = 0; i < count; ++i) { - JDWP::ObjectId id = request->ReadObjectId(); - ObjPtr<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(); - ObjPtr<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; - ObjPtr<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); - 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; - ObjPtr<mirror::Class> c = DecodeClass(array_class_id, &error); - if (c == nullptr) { - *new_array_id = 0; - return error; - } - Thread* self = Thread::Current(); - gc::AllocatorType allocator_type = Runtime::Current()->GetHeap()->GetCurrentAllocator(); - ObjPtr<mirror::Array> new_array = - mirror::Array::Alloc<true>(self, c, length, c->GetComponentSizeShift(), allocator_type); - 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>(m->GetCanonicalMethod(kRuntimePointerSize))); -} - -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 { - ObjPtr<mirror::Class> c = m->GetDeclaringClass(); - location->type_tag = GetTypeTag(c); - location->class_id = gRegistry->AddRefType(c); - // The RI Seems to return 0 for all obsolete methods. For compatibility we shall do the same. - location->method_id = m->IsObsolete() ? 0 : 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(); -} - -bool Dbg::IsMethodObsolete(JDWP::MethodId method_id) { - ArtMethod* m = FromMethodId(method_id); - if (m == nullptr) { - // NB Since we return 0 as MID for obsolete methods we want to default to true here. - return true; - } - return m->IsObsolete(); -} - -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_) { - CodeItemDataAccessor accessor(m->DexInstructionData()); - if (!accessor.HasCodeItem()) { - // 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 = accessor.InsSize(); - uint16_t locals_size = accessor.RegistersSize() - 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_) { - CodeItemDataAccessor accessor(m->DexInstructionData()); - if (!accessor.HasCodeItem()) { - // 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 < accessor.RegistersSize()) { - uint16_t ins_size = accessor.InsSize(); - uint16_t locals_size = accessor.RegistersSize() - 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; - ObjPtr<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; - ObjPtr<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) { - ArtMethod* m = FromMethodId(method_id); - CodeItemDebugInfoAccessor accessor(m->DexInstructionDebugInfo()); - uint64_t start, end; - if (!accessor.HasCodeItem()) { - DCHECK(m->IsNative() || m->IsProxyMethod()); - start = -1; - end = -1; - } else { - start = 0; - // Return the index of the last instruction - end = accessor.InsnsSizeInCodeUnits() - 1; - } - - expandBufAdd8BE(pReply, start); - expandBufAdd8BE(pReply, end); - - // Add numLines later - size_t numLinesOffset = expandBufGetLength(pReply); - expandBufAdd4BE(pReply, 0); - - int numItems = 0; - accessor.DecodeDebugPositionInfo([&](const DexFile::PositionInfo& entry) { - expandBufAdd8BE(pReply, entry.address_); - expandBufAdd4BE(pReply, entry.line_); - numItems++; - return false; - }); - - JDWP::Set4BE(expandBufGetBuffer(pReply) + numLinesOffset, numItems); -} - -void Dbg::OutputVariableTable(JDWP::RefTypeId, JDWP::MethodId method_id, bool with_generic, - JDWP::ExpandBuf* pReply) { - ArtMethod* m = FromMethodId(method_id); - CodeItemDebugInfoAccessor accessor(m->DexInstructionDebugInfo()); - - // 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); - - size_t variable_count = 0; - - if (accessor.HasCodeItem()) { - accessor.DecodeDebugLocalInfo(m->IsStatic(), - m->GetDexMethodIndex(), - [&](const DexFile::LocalInfo& entry) - REQUIRES_SHARED(Locks::mutator_lock_) { - uint16_t slot = entry.reg_; - VLOG(jdwp) << StringPrintf(" %2zd: %d(%d) '%s' '%s' '%s' actual slot=%d mangled slot=%d", - variable_count, - entry.start_address_, - entry.end_address_ - entry.start_address_, - entry.name_, - entry.descriptor_, entry.signature_, - slot, - MangleSlot(slot, m)); - - slot = MangleSlot(slot, m); - - expandBufAdd8BE(pReply, entry.start_address_); - expandBufAddUtf8String(pReply, entry.name_); - expandBufAddUtf8String(pReply, entry.descriptor_); - if (with_generic) { - expandBufAddUtf8String(pReply, entry.signature_); - } - expandBufAdd4BE(pReply, entry.end_address_- entry.start_address_); - expandBufAdd4BE(pReply, slot); - - ++variable_count; - }); - } - - JDWP::Set4BE(expandBufGetBuffer(pReply) + variable_count_offset, 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; - } - CodeItemDataAccessor accessor(m->DexInstructionData()); - size_t byte_count = accessor.InsnsSizeInCodeUnits() * 2; - const uint8_t* begin = reinterpret_cast<const uint8_t*>(accessor.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)); - 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; - ObjPtr<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); - - ObjPtr<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->ResolveType(); - } - 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 kWaitingForTaskProcessor: - case kWaitingForLockInflation: - 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 kNativeForAbort: - 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; - UNREACHABLE(); -} - -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_) { - size_t depth = 0u; - StackVisitor::WalkStack( - [&depth](const StackVisitor* visitor) REQUIRES_SHARED(Locks::mutator_lock_) { - if (!visitor->GetMethod()->IsRuntimeMethod()) { - ++depth; - } - return true; - }, - thread, - /* context= */ nullptr, - StackVisitor::StackWalkKind::kIncludeInlinedFrames); - return 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, - 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; - } - - expandBufAdd4BE(buf, frame_count); - - size_t depth = 0u; - StackVisitor::WalkStack( - [&](StackVisitor* visitor) REQUIRES_SHARED(Locks::mutator_lock_) { - if (visitor->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(visitor->GetFrameId()); - JDWP::JdwpLocation location; - SetJdwpLocation(&location, visitor->GetMethod(), visitor->GetDexPc()); - VLOG(jdwp) - << StringPrintf(" Frame %3zd: id=%3" PRIu64 " ", depth, frame_id) << location; - expandBufAdd8BE(buf, frame_id); - expandBufAddLocation(buf, location); - } - ++depth; - return true; - }, - thread, - /* context= */ nullptr, - StackVisitor::StackWalkKind::kIncludeInlinedFrames); - - 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, - SuspendReason::kForDebugger, - &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->GetDebugSuspendCount() > 0; - } - if (needs_resume) { - bool resumed = Runtime::Current()->GetThreadList()->Resume(thread, SuspendReason::kForDebugger); - DCHECK(resumed); - } -} - -void Dbg::SuspendSelf() { - Runtime::Current()->GetThreadList()->SuspendSelfForDebugger(); -} - -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()); - mirror::Object* this_object = nullptr; - StackVisitor::WalkStack( - [&](art::StackVisitor* stack_visitor) REQUIRES_SHARED(Locks::mutator_lock_) { - if (frame_id != stack_visitor->GetFrameId()) { - return true; // continue - } else { - this_object = stack_visitor->GetThisObject(); - return false; - } - }, - thread, - context.get(), - art::StackVisitor::StackWalkKind::kIncludeInlinedFrames); - *result = gRegistry->Add(this_object); - return JDWP::ERR_NONE; -} - -template <typename FrameHandler> -static JDWP::JdwpError FindAndHandleNonNativeFrame(Thread* thread, - JDWP::FrameId frame_id, - const FrameHandler& handler) - REQUIRES_SHARED(Locks::mutator_lock_) { - JDWP::JdwpError result = JDWP::ERR_INVALID_FRAMEID; - std::unique_ptr<Context> context(Context::Create()); - StackVisitor::WalkStack( - [&](art::StackVisitor* stack_visitor) REQUIRES_SHARED(Locks::mutator_lock_) { - if (stack_visitor->GetFrameId() != frame_id) { - return true; // Not our frame, carry on. - } - ArtMethod* m = stack_visitor->GetMethod(); - if (m->IsNative()) { - // We can't read/write local value from/into native method. - result = JDWP::ERR_OPAQUE_FRAME; - } else { - // We found our frame. - result = handler(stack_visitor); - } - return false; - }, - thread, - context.get(), - art::StackVisitor::StackWalkKind::kIncludeInlinedFrames); - return result; -} - -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; - } - - return FindAndHandleNonNativeFrame( - thread, - frame_id, - [&](art::StackVisitor* stack_visitor) REQUIRES_SHARED(Locks::mutator_lock_) { - // 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(*stack_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; - } - - return FindAndHandleNonNativeFrame( - thread, - frame_id, - [&](art::StackVisitor* stack_visitor) REQUIRES_SHARED(Locks::mutator_lock_) { - // 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, *stack_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 = m->GetCanonicalMethod(kRuntimePointerSize); - 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 Instruction& instr = location.method->DexInstructions().InstructionAt(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) { - // TODO We should send events for native methods. - if (!IsDebuggerActive() || m->IsNative()) { - 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) { - // TODO We should send events for native methods. - if (!IsDebuggerActive() || m->IsNative()) { - 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); -} - -void Dbg::PostException(mirror::Throwable* exception_object) { - if (!IsDebuggerActive()) { - return; - } - Thread* const self = Thread::Current(); - StackHandleScope<2> handle_scope(self); - Handle<mirror::Throwable> h_exception(handle_scope.NewHandle(exception_object)); - MutableHandle<mirror::Object> this_at_throw = handle_scope.NewHandle<mirror::Object>(nullptr); - std::unique_ptr<Context> context(Context::Create()); - - ArtMethod* catch_method = nullptr; - ArtMethod* throw_method = nullptr; - uint32_t catch_dex_pc = dex::kDexNoIndex; - uint32_t throw_dex_pc = dex::kDexNoIndex; - StackVisitor::WalkStack( - /** - * 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. - */ - [&](const art::StackVisitor* stack_visitor) REQUIRES_SHARED(Locks::mutator_lock_) { - ArtMethod* method = stack_visitor->GetMethod(); - DCHECK(method != nullptr); - if (method->IsRuntimeMethod()) { - // Ignore callee save method. - DCHECK(method->IsCalleeSaveMethod()); - return true; - } - - uint32_t dex_pc = stack_visitor->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(stack_visitor->GetThisObject()); - throw_method = method; - throw_dex_pc = dex_pc; - } - - if (dex_pc != dex::kDexNoIndex) { - StackHandleScope<1> hs(stack_visitor->GetThread()); - uint32_t found_dex_pc; - Handle<mirror::Class> exception_class(hs.NewHandle(h_exception->GetClass())); - bool unused_clear_exception; - found_dex_pc = method->FindCatchBlock(exception_class, dex_pc, &unused_clear_exception); - if (found_dex_pc != dex::kDexNoIndex) { - catch_method = method; - catch_dex_pc = found_dex_pc; - return false; // End stack walk. - } - } - return true; // Continue stack walk. - }, - self, - context.get(), - art::StackVisitor::StackWalkKind::kIncludeInlinedFrames); - - JDWP::EventLocation exception_throw_location; - SetEventLocation(&exception_throw_location, throw_method, throw_dex_pc); - JDWP::EventLocation exception_catch_location; - SetEventLocation(&exception_catch_location, catch_method, catch_dex_pc); - - gJdwpState->PostException(&exception_throw_location, - h_exception.Get(), - &exception_catch_location, - this_at_throw.Get()); -} - -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::kExceptionThrown: - 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(); - UNREACHABLE(); - } -} - -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(); - UNREACHABLE(); - } - } -} - -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); -} - // 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). bool needs_deoptimization = false; @@ -3627,569 +181,6 @@ bool Dbg::IsForcedInterpreterNeededForExceptionImpl(Thread* thread) { return needs_deoptimization; } -// 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, - /* request_suspension= */ true, - SuspendReason::kForDebugger, - &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_) { - bool resumed = Runtime::Current()->GetThreadList()->Resume(thread_, - SuspendReason::kForDebugger); - DCHECK(resumed); - } - } - - 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() override NO_THREAD_SAFETY_ANALYSIS { - ArtMethod* m = GetMethod(); - if (!m->IsRuntimeMethod()) { - ++stack_depth; - if (method == nullptr) { - const DexFile* dex_file = m->GetDexFile(); - method = m; - if (dex_file != nullptr) { - 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(); - - // 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()) { - CodeItemDebugInfoAccessor accessor(m->DexInstructionDebugInfo()); - bool last_pc_valid = false; - uint32_t last_pc = 0u; - // Find the dex_pc values that correspond to the current line, for line-based single-stepping. - accessor.DecodeDebugPositionInfo([&](const DexFile::PositionInfo& entry) { - if (static_cast<int32_t>(entry.line_) == line_number) { - if (!last_pc_valid) { - // Everything from this address until the next line change is ours. - last_pc = entry.address_; - 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 (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 = last_pc; dex_pc < entry.address_; ++dex_pc) { - single_step_control->AddDexPc(dex_pc); - } - last_pc_valid = false; - } - return false; // There may be multiple entries for any given line. - }); - // If the line number was the last in the position table... - if (last_pc_valid) { - for (uint32_t dex_pc = last_pc; dex_pc < accessor.InsnsSizeInCodeUnits(); ++dex_pc) { - single_step_control->AddDexPc(dex_pc); - } - } - } - - // 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."; - } - - ObjPtr<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; - } - - ObjPtr<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()); - HandleWrapperObjPtr<mirror::Object> h_obj(hs.NewHandleWrapper(&receiver)); - HandleWrapperObjPtr<mirror::Class> h_klass(hs.NewHandleWrapper(&c)); - const dex::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? - ObjPtr<mirror::Class> parameter_type = - m->ResolveClassFromTypeIndex(types->GetTypeItem(i).type_idx_); - 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"; - bool resumed = thread_list->Resume(targetThread, SuspendReason::kForDebugger); - DCHECK(resumed); - } - - 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"; - } -} bool Dbg::DdmHandleChunk(JNIEnv* env, uint32_t type, @@ -4273,52 +264,6 @@ bool Dbg::DdmHandleChunk(JNIEnv* env, return true; } -/* - * "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(); - // Run through and find all chunks. [Currently just find the first.] - if (length != request_length) { - LOG(WARNING) << StringPrintf("bad chunk found (len=%u pktLen=%zd)", length, request_length); - return false; - } - - ArrayRef<const jbyte> data(reinterpret_cast<const jbyte*>(request->data()), request_length); - std::vector<uint8_t> out_data; - uint32_t out_type = 0; - request->Skip(request_length); - if (!DdmHandleChunk(env, type, data, &out_type, &out_data) || out_data.empty()) { - return false; - } - const uint32_t kDdmHeaderSize = 8; - *pReplyLen = out_data.size() + kDdmHeaderSize; - *pReplyBuf = new uint8_t[out_data.size() + kDdmHeaderSize]; - memcpy((*pReplyBuf) + kDdmHeaderSize, out_data.data(), out_data.size()); - JDWP::Set4BE(*pReplyBuf, out_type); - JDWP::Set4BE((*pReplyBuf) + 4, static_cast<uint32_t>(out_data.size())); - VLOG(jdwp) - << StringPrintf("dvmHandleDdm returning type=%.4s", reinterpret_cast<char*>(*pReplyBuf)) - << "0x" << std::hex << reinterpret_cast<uintptr_t>(*pReplyBuf) << std::dec - << " len= " << out_data.size(); - return true; -} - void Dbg::DdmBroadcast(bool connect) { VLOG(jdwp) << "Broadcasting DDM " << (connect ? "connect" : "disconnect") << "..."; @@ -4349,6 +294,7 @@ void Dbg::DdmDisconnected() { gDdmThreadNotification = false; } + /* * Send a notification when a thread starts, stops, or changes its name. * @@ -4356,6 +302,7 @@ void Dbg::DdmDisconnected() { * first enabled, it's possible for "thread" to be actively executing. */ void Dbg::DdmSendThreadNotification(Thread* t, uint32_t type) { + Locks::mutator_lock_->AssertNotExclusiveHeld(Thread::Current()); if (!gDdmThreadNotification) { return; } @@ -4363,24 +310,23 @@ void Dbg::DdmSendThreadNotification(Thread* t, uint32_t type) { RuntimeCallbacks* cb = Runtime::Current()->GetRuntimeCallbacks(); if (type == CHUNK_TYPE("THDE")) { uint8_t buf[4]; - JDWP::Set4BE(&buf[0], t->GetThreadId()); + Set4BE(&buf[0], t->GetThreadId()); cb->DdmPublishChunk(CHUNK_TYPE("THDE"), ArrayRef<const uint8_t>(buf)); } else { CHECK(type == CHUNK_TYPE("THCR") || type == CHUNK_TYPE("THNM")) << type; - ScopedObjectAccessUnchecked soa(Thread::Current()); - StackHandleScope<1> hs(soa.Self()); + StackHandleScope<1> hs(Thread::Current()); 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()); + Append4BE(bytes, t->GetThreadId()); if (is_compressed) { const uint8_t* chars_compressed = name->GetValueCompressed(); - JDWP::AppendUtf16CompressedBE(bytes, chars_compressed, char_count); + AppendUtf16CompressedBE(bytes, chars_compressed, char_count); } else { - JDWP::AppendUtf16BE(bytes, chars, char_count); + AppendUtf16BE(bytes, chars, char_count); } CHECK_EQ(bytes.size(), char_count*2 + sizeof(uint32_t)*2); cb->DdmPublishChunk(type, ArrayRef<const uint8_t>(bytes)); @@ -4391,30 +337,25 @@ 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; + // Use a Checkpoint to cause every currently running thread to send their own notification when + // able. We then wait for every thread thread active at the time to post the creation + // notification. Threads created later will send this themselves. 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(); + ScopedObjectAccess soa(self); + Barrier finish_barrier(0); + FunctionClosure fc([&](Thread* thread) REQUIRES_SHARED(Locks::mutator_lock_) { + Thread* cls_self = Thread::Current(); + Locks::mutator_lock_->AssertSharedHeld(cls_self); + Dbg::DdmSendThreadNotification(thread, CHUNK_TYPE("THCR")); + finish_barrier.Pass(cls_self); + }); + size_t checkpoints = Runtime::Current()->GetThreadList()->RunCheckpoint(&fc); + ScopedThreadSuspension sts(self, ThreadState::kWaitingForCheckPointsToRun); + finish_barrier.Increment(self, checkpoints); } } void Dbg::PostThreadStartOrStop(Thread* t, uint32_t type) { - if (IsDebuggerActive()) { - gJdwpState->PostThreadChange(t, type == CHUNK_TYPE("THCR")); - } Dbg::DdmSendThreadNotification(t, type); } @@ -4426,23 +367,19 @@ void Dbg::PostThreadDeath(Thread* t) { Dbg::PostThreadStartOrStop(t, CHUNK_TYPE("THDE")); } -JDWP::JdwpState* Dbg::GetJdwpState() { - return gJdwpState; -} - int Dbg::DdmHandleHpifChunk(HpifWhen when) { if (when == HPIF_WHEN_NOW) { DdmSendHeapInfo(when); - return true; + return 1; } 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; + return 0; } gDdmHpifWhen = when; - return true; + return 1; } bool Dbg::DdmHandleHpsgNhsgChunk(Dbg::HpsgWhen when, Dbg::HpsgWhat what, bool native) { @@ -4494,14 +431,14 @@ void Dbg::DdmSendHeapInfo(HpifWhen reason) { 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()); + Append4BE(bytes, heap_count); + Append4BE(bytes, 1); // Heap id (bogus; we only have one heap). + Append8BE(bytes, MilliTime()); + Append1BE(bytes, reason); + Append4BE(bytes, heap->GetMaxMemory()); // Max allowed heap size in bytes. + Append4BE(bytes, heap->GetTotalMemory()); // Current heap size in bytes. + Append4BE(bytes, heap->GetBytesAllocated()); + Append4BE(bytes, heap->GetObjectsAllocated()); CHECK_EQ(bytes.size(), 4U + (heap_count * (4 + 8 + 1 + 4 + 4 + 4 + 4))); Runtime::Current()->GetRuntimeCallbacks()->DdmPublishChunk(CHUNK_TYPE("HPIF"), ArrayRef<const uint8_t>(bytes)); @@ -4567,15 +504,15 @@ class HeapChunkContext { } // 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. + Write4BE(&p_, 1); // Heap id (bogus; we only have one heap). + 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). + Write4BE(&p_, reinterpret_cast<uintptr_t>(chunk_ptr)); // virtual address of segment start. + 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); + Write4BE(&p_, 0x55555555); needHeader_ = false; } @@ -4588,7 +525,7 @@ class HeapChunkContext { // Patch the "length of piece" field. CHECK_LE(&buf_[0], pieceLenField_); CHECK_LE(pieceLenField_, p_); - JDWP::Set4BE(pieceLenField_, totalAllocationUnits_); + Set4BE(pieceLenField_, totalAllocationUnits_); ArrayRef<const uint8_t> out(&buf_[0], p_ - &buf_[0]); Runtime::Current()->GetRuntimeCallbacks()->DdmPublishChunk(type_, out); @@ -4717,7 +654,7 @@ class HeapChunkContext { return p == nullptr ? HPSG_STATE(SOLIDITY_FREE, 0) : HPSG_STATE(SOLIDITY_HARD, KIND_NATIVE); } - uint8_t ExamineJavaObject(mirror::Object* o) + uint8_t ExamineJavaObject(ObjPtr<mirror::Object> o) REQUIRES_SHARED(Locks::mutator_lock_, Locks::heap_bitmap_lock_) { if (o == nullptr) { return HPSG_STATE(SOLIDITY_FREE, 0); @@ -4767,6 +704,7 @@ class HeapChunkContext { DISALLOW_COPY_AND_ASSIGN(HeapChunkContext); }; + void Dbg::DdmSendHeapSegments(bool native) { Dbg::HpsgWhen when = native ? gDdmNhsgWhen : gDdmHpsgWhen; Dbg::HpsgWhat what = native ? gDdmNhsgWhat : gDdmHpsgWhat; @@ -4780,7 +718,7 @@ void Dbg::DdmSendHeapSegments(bool native) { // 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). + Set4BE(&heap_id[0], 1); // Heap id (bogus; we only have one heap). cb->DdmPublishChunk(native ? CHUNK_TYPE("NHST") : CHUNK_TYPE("HPST"), ArrayRef<const uint8_t>(heap_id)); Thread* self = Thread::Current(); @@ -4849,41 +787,6 @@ 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 { private: struct Entry { @@ -4975,7 +878,7 @@ class StringTable { size_t s_len = CountModifiedUtf8Chars(entry.data); std::unique_ptr<uint16_t[]> s_utf16(new uint16_t[s_len]); ConvertModifiedUtf8ToUtf16(s_utf16.get(), entry.data); - JDWP::AppendUtf16BE(bytes, s_utf16.get(), s_len); + AppendUtf16BE(bytes, s_utf16.get(), s_len); } } @@ -4988,6 +891,7 @@ class StringTable { DISALLOW_COPY_AND_ASSIGN(StringTable); }; + static const char* GetMethodSourceFile(ArtMethod* method) REQUIRES_SHARED(Locks::mutator_lock_) { DCHECK(method != nullptr); @@ -5112,21 +1016,21 @@ jbyteArray Dbg::GetRecentAllocations() { const int kMessageHeaderLen = 15; const int kEntryHeaderLen = 9; const int kStackFrameLen = 8; - JDWP::Append1BE(bytes, kMessageHeaderLen); - JDWP::Append1BE(bytes, kEntryHeaderLen); - JDWP::Append1BE(bytes, kStackFrameLen); + Append1BE(bytes, kMessageHeaderLen); + Append1BE(bytes, kEntryHeaderLen); + 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); + 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()); + Append4BE(bytes, 0); // We'll patch this later... + Append2BE(bytes, class_names.Size()); + Append2BE(bytes, method_names.Size()); + Append2BE(bytes, filenames.Size()); VLOG(jdwp) << "Dumping allocations with stacks"; @@ -5149,10 +1053,10 @@ jbyteArray Dbg::GetRecentAllocations() { 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); + Append4BE(bytes, record->ByteCount()); + Append2BE(bytes, static_cast<uint16_t>(record->GetTid())); + Append2BE(bytes, allocated_object_class_name_index); + Append1BE(bytes, stack_depth); for (size_t stack_frame = 0; stack_frame < stack_depth; ++stack_frame) { // For each stack frame: @@ -5164,10 +1068,10 @@ jbyteArray Dbg::GetRecentAllocations() { 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()); + Append2BE(bytes, class_name_index); + Append2BE(bytes, method_name_index); + Append2BE(bytes, file_name_index); + Append2BE(bytes, record->StackElement(stack_frame).ComputeLineNumber()); } } @@ -5177,7 +1081,7 @@ jbyteArray Dbg::GetRecentAllocations() { // (xb) class name strings // (xb) method name strings // (xb) source file strings - JDWP::Set4BE(&bytes[string_table_offset], bytes.size()); + Set4BE(&bytes[string_table_offset], bytes.size()); class_names.WriteTo(bytes); method_names.WriteTo(bytes); filenames.WriteTo(bytes); @@ -5192,23 +1096,6 @@ jbyteArray Dbg::GetRecentAllocations() { 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); } @@ -5217,12 +1104,4 @@ 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 |