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/*
* Copyright (C) 2016 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "art_method-inl.h"
#include "jit/jit.h"
#include "jit/jit_code_cache.h"
#include "jit/profiling_info.h"
#include "oat_quick_method_header.h"
#include "scoped_thread_state_change.h"
#include "ScopedUtfChars.h"
#include "stack_map.h"
namespace art {
class OsrVisitor : public StackVisitor {
public:
explicit OsrVisitor(Thread* thread, const char* method_name)
SHARED_REQUIRES(Locks::mutator_lock_)
: StackVisitor(thread, nullptr, StackVisitor::StackWalkKind::kIncludeInlinedFrames),
method_name_(method_name),
in_osr_method_(false),
in_interpreter_(false) {}
bool VisitFrame() SHARED_REQUIRES(Locks::mutator_lock_) {
ArtMethod* m = GetMethod();
std::string m_name(m->GetName());
if (m_name.compare(method_name_) == 0) {
const OatQuickMethodHeader* header =
Runtime::Current()->GetJit()->GetCodeCache()->LookupOsrMethodHeader(m);
if (header != nullptr && header == GetCurrentOatQuickMethodHeader()) {
in_osr_method_ = true;
} else if (IsCurrentFrameInInterpreter()) {
in_interpreter_ = true;
}
return false;
}
return true;
}
const char* const method_name_;
bool in_osr_method_;
bool in_interpreter_;
};
extern "C" JNIEXPORT jboolean JNICALL Java_Main_isInOsrCode(JNIEnv* env,
jclass,
jstring method_name) {
jit::Jit* jit = Runtime::Current()->GetJit();
if (jit == nullptr) {
// Just return true for non-jit configurations to stop the infinite loop.
return JNI_TRUE;
}
ScopedUtfChars chars(env, method_name);
CHECK(chars.c_str() != nullptr);
ScopedObjectAccess soa(Thread::Current());
OsrVisitor visitor(soa.Self(), chars.c_str());
visitor.WalkStack();
return visitor.in_osr_method_;
}
extern "C" JNIEXPORT jboolean JNICALL Java_Main_isInInterpreter(JNIEnv* env,
jclass,
jstring method_name) {
if (!Runtime::Current()->UseJitCompilation()) {
// The return value is irrelevant if we're not using JIT.
return false;
}
ScopedUtfChars chars(env, method_name);
CHECK(chars.c_str() != nullptr);
ScopedObjectAccess soa(Thread::Current());
OsrVisitor visitor(soa.Self(), chars.c_str());
visitor.WalkStack();
return visitor.in_interpreter_;
}
class ProfilingInfoVisitor : public StackVisitor {
public:
explicit ProfilingInfoVisitor(Thread* thread, const char* method_name)
SHARED_REQUIRES(Locks::mutator_lock_)
: StackVisitor(thread, nullptr, StackVisitor::StackWalkKind::kIncludeInlinedFrames),
method_name_(method_name) {}
bool VisitFrame() SHARED_REQUIRES(Locks::mutator_lock_) {
ArtMethod* m = GetMethod();
std::string m_name(m->GetName());
if (m_name.compare(method_name_) == 0) {
ProfilingInfo::Create(Thread::Current(), m, /* retry_allocation */ true);
return false;
}
return true;
}
const char* const method_name_;
};
extern "C" JNIEXPORT void JNICALL Java_Main_ensureHasProfilingInfo(JNIEnv* env,
jclass,
jstring method_name) {
if (!Runtime::Current()->UseJitCompilation()) {
return;
}
ScopedUtfChars chars(env, method_name);
CHECK(chars.c_str() != nullptr);
ScopedObjectAccess soa(Thread::Current());
ProfilingInfoVisitor visitor(soa.Self(), chars.c_str());
visitor.WalkStack();
}
class OsrCheckVisitor : public StackVisitor {
public:
OsrCheckVisitor(Thread* thread, const char* method_name)
SHARED_REQUIRES(Locks::mutator_lock_)
: StackVisitor(thread, nullptr, StackVisitor::StackWalkKind::kIncludeInlinedFrames),
method_name_(method_name) {}
bool VisitFrame() SHARED_REQUIRES(Locks::mutator_lock_) {
ArtMethod* m = GetMethod();
std::string m_name(m->GetName());
jit::Jit* jit = Runtime::Current()->GetJit();
if (m_name.compare(method_name_) == 0) {
while (jit->GetCodeCache()->LookupOsrMethodHeader(m) == nullptr) {
// Sleep to yield to the compiler thread.
usleep(1000);
// Will either ensure it's compiled or do the compilation itself.
jit->CompileMethod(m, Thread::Current(), /* osr */ true);
}
return false;
}
return true;
}
const char* const method_name_;
};
extern "C" JNIEXPORT void JNICALL Java_Main_ensureHasOsrCode(JNIEnv* env,
jclass,
jstring method_name) {
if (!Runtime::Current()->UseJitCompilation()) {
return;
}
ScopedUtfChars chars(env, method_name);
CHECK(chars.c_str() != nullptr);
ScopedObjectAccess soa(Thread::Current());
OsrCheckVisitor visitor(soa.Self(), chars.c_str());
visitor.WalkStack();
}
} // namespace art
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