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/*
* Copyright 2014 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 "jit.h"
#include <dlfcn.h>
#include "entrypoints/runtime_asm_entrypoints.h"
#include "interpreter/interpreter.h"
#include "jit_code_cache.h"
#include "jit_instrumentation.h"
#include "mirror/art_method-inl.h"
#include "runtime.h"
#include "runtime_options.h"
#include "thread_list.h"
#include "utils.h"
namespace art {
namespace jit {
JitOptions* JitOptions::CreateFromRuntimeArguments(const RuntimeArgumentMap& options) {
if (!options.GetOrDefault(RuntimeArgumentMap::UseJIT)) {
return nullptr;
}
auto* jit_options = new JitOptions;
jit_options->code_cache_capacity_ =
options.GetOrDefault(RuntimeArgumentMap::JITCodeCacheCapacity);
jit_options->compile_threshold_ =
options.GetOrDefault(RuntimeArgumentMap::JITCompileThreshold);
return jit_options;
}
Jit::Jit()
: jit_library_handle_(nullptr), jit_compiler_handle_(nullptr), jit_load_(nullptr),
jit_compile_method_(nullptr) {
}
Jit* Jit::Create(JitOptions* options, std::string* error_msg) {
std::unique_ptr<Jit> jit(new Jit);
if (!jit->LoadCompiler(error_msg)) {
return nullptr;
}
jit->code_cache_.reset(JitCodeCache::Create(options->GetCodeCacheCapacity(), error_msg));
if (jit->GetCodeCache() == nullptr) {
return nullptr;
}
LOG(INFO) << "JIT created with code_cache_capacity="
<< PrettySize(options->GetCodeCacheCapacity())
<< " compile_threshold=" << options->GetCompileThreshold();
return jit.release();
}
bool Jit::LoadCompiler(std::string* error_msg) {
jit_library_handle_ = dlopen(
kIsDebugBuild ? "libartd-compiler.so" : "libart-compiler.so", RTLD_NOW);
if (jit_library_handle_ == nullptr) {
std::ostringstream oss;
oss << "JIT could not load libart-compiler.so: " << dlerror();
*error_msg = oss.str();
return false;
}
jit_load_ = reinterpret_cast<void* (*)(CompilerCallbacks**)>(
dlsym(jit_library_handle_, "jit_load"));
if (jit_load_ == nullptr) {
dlclose(jit_library_handle_);
*error_msg = "JIT couldn't find jit_load entry point";
return false;
}
jit_unload_ = reinterpret_cast<void (*)(void*)>(
dlsym(jit_library_handle_, "jit_unload"));
if (jit_unload_ == nullptr) {
dlclose(jit_library_handle_);
*error_msg = "JIT couldn't find jit_unload entry point";
return false;
}
jit_compile_method_ = reinterpret_cast<bool (*)(void*, mirror::ArtMethod*, Thread*)>(
dlsym(jit_library_handle_, "jit_compile_method"));
if (jit_compile_method_ == nullptr) {
dlclose(jit_library_handle_);
*error_msg = "JIT couldn't find jit_compile_method entry point";
return false;
}
CompilerCallbacks* callbacks = nullptr;
VLOG(jit) << "Calling JitLoad interpreter_only="
<< Runtime::Current()->GetInstrumentation()->InterpretOnly();
jit_compiler_handle_ = (jit_load_)(&callbacks);
if (jit_compiler_handle_ == nullptr) {
dlclose(jit_library_handle_);
*error_msg = "JIT couldn't load compiler";
return false;
}
if (callbacks == nullptr) {
dlclose(jit_library_handle_);
*error_msg = "JIT compiler callbacks were not set";
jit_compiler_handle_ = nullptr;
return false;
}
compiler_callbacks_ = callbacks;
return true;
}
bool Jit::CompileMethod(mirror::ArtMethod* method, Thread* self) {
DCHECK(!method->IsRuntimeMethod());
const bool result = jit_compile_method_(jit_compiler_handle_, method, self);
if (result) {
method->SetEntryPointFromInterpreter(artInterpreterToCompiledCodeBridge);
}
return result;
}
void Jit::CreateThreadPool() {
CHECK(instrumentation_cache_.get() != nullptr);
instrumentation_cache_->CreateThreadPool();
}
void Jit::DeleteThreadPool() {
if (instrumentation_cache_.get() != nullptr) {
instrumentation_cache_->DeleteThreadPool();
}
}
Jit::~Jit() {
DeleteThreadPool();
if (jit_compiler_handle_ != nullptr) {
jit_unload_(jit_compiler_handle_);
}
if (jit_library_handle_ != nullptr) {
dlclose(jit_library_handle_);
}
}
void Jit::CreateInstrumentationCache(size_t compile_threshold) {
CHECK_GT(compile_threshold, 0U);
Runtime* const runtime = Runtime::Current();
runtime->GetThreadList()->SuspendAll();
// Add Jit interpreter instrumentation, tells the interpreter when to notify the jit to compile
// something.
instrumentation_cache_.reset(new jit::JitInstrumentationCache(compile_threshold));
runtime->GetInstrumentation()->AddListener(
new jit::JitInstrumentationListener(instrumentation_cache_.get()),
instrumentation::Instrumentation::kMethodEntered |
instrumentation::Instrumentation::kBackwardBranch);
runtime->GetThreadList()->ResumeAll();
}
} // namespace jit
} // namespace art
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