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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_compiler.h"
#include "android-base/stringprintf.h"
#include "arch/instruction_set.h"
#include "arch/instruction_set_features.h"
#include "art_method-inl.h"
#include "base/logging.h" // For VLOG
#include "base/stringpiece.h"
#include "base/systrace.h"
#include "base/time_utils.h"
#include "base/timing_logger.h"
#include "base/unix_file/fd_file.h"
#include "debug/elf_debug_writer.h"
#include "driver/compiler_driver.h"
#include "driver/compiler_options.h"
#include "jit/debugger_interface.h"
#include "jit/jit.h"
#include "jit/jit_code_cache.h"
#include "oat_file-inl.h"
#include "oat_quick_method_header.h"
#include "object_lock.h"
#include "optimizing/register_allocator.h"
#include "thread_list.h"
namespace art {
namespace jit {
JitCompiler* JitCompiler::Create() {
return new JitCompiler();
}
extern "C" void* jit_load(bool* generate_debug_info) {
VLOG(jit) << "loading jit compiler";
auto* const jit_compiler = JitCompiler::Create();
CHECK(jit_compiler != nullptr);
*generate_debug_info = jit_compiler->GetCompilerOptions()->GetGenerateDebugInfo();
VLOG(jit) << "Done loading jit compiler";
return jit_compiler;
}
extern "C" void jit_unload(void* handle) {
DCHECK(handle != nullptr);
delete reinterpret_cast<JitCompiler*>(handle);
}
extern "C" bool jit_compile_method(
void* handle, ArtMethod* method, Thread* self, bool osr)
REQUIRES_SHARED(Locks::mutator_lock_) {
auto* jit_compiler = reinterpret_cast<JitCompiler*>(handle);
DCHECK(jit_compiler != nullptr);
return jit_compiler->CompileMethod(self, method, osr);
}
extern "C" void jit_types_loaded(void* handle, mirror::Class** types, size_t count)
REQUIRES_SHARED(Locks::mutator_lock_) {
auto* jit_compiler = reinterpret_cast<JitCompiler*>(handle);
DCHECK(jit_compiler != nullptr);
if (jit_compiler->GetCompilerOptions()->GetGenerateDebugInfo()) {
const ArrayRef<mirror::Class*> types_array(types, count);
std::vector<uint8_t> elf_file = debug::WriteDebugElfFileForClasses(
kRuntimeISA, jit_compiler->GetCompilerDriver()->GetInstructionSetFeatures(), types_array);
MutexLock mu(Thread::Current(), *Locks::native_debug_interface_lock_);
// We never free debug info for types, so we don't need to provide a handle
// (which would have been otherwise used as identifier to remove it later).
AddNativeDebugInfoForJit(nullptr /* handle */, elf_file);
}
}
JitCompiler::JitCompiler() {
compiler_options_.reset(new CompilerOptions());
// Special case max code units for inlining, whose default is "unset" (implictly
// meaning no limit). Do this before parsing the actuall passed options.
compiler_options_->SetInlineMaxCodeUnits(CompilerOptions::kDefaultInlineMaxCodeUnits);
{
std::string error_msg;
if (!compiler_options_->ParseCompilerOptions(Runtime::Current()->GetCompilerOptions(),
true /* ignore_unrecognized */,
&error_msg)) {
LOG(FATAL) << error_msg;
UNREACHABLE();
}
}
// JIT is never PIC, no matter what the runtime compiler options specify.
compiler_options_->SetNonPic();
// Set debuggability based on the runtime value.
compiler_options_->SetDebuggable(Runtime::Current()->IsJavaDebuggable());
const InstructionSet instruction_set = kRuntimeISA;
for (const StringPiece option : Runtime::Current()->GetCompilerOptions()) {
VLOG(compiler) << "JIT compiler option " << option;
std::string error_msg;
if (option.starts_with("--instruction-set-variant=")) {
StringPiece str = option.substr(strlen("--instruction-set-variant=")).data();
VLOG(compiler) << "JIT instruction set variant " << str;
instruction_set_features_ = InstructionSetFeatures::FromVariant(
instruction_set, str.as_string(), &error_msg);
if (instruction_set_features_ == nullptr) {
LOG(WARNING) << "Error parsing " << option << " message=" << error_msg;
}
} else if (option.starts_with("--instruction-set-features=")) {
StringPiece str = option.substr(strlen("--instruction-set-features=")).data();
VLOG(compiler) << "JIT instruction set features " << str;
if (instruction_set_features_ == nullptr) {
instruction_set_features_ = InstructionSetFeatures::FromVariant(
instruction_set, "default", &error_msg);
if (instruction_set_features_ == nullptr) {
LOG(WARNING) << "Error parsing " << option << " message=" << error_msg;
}
}
instruction_set_features_ =
instruction_set_features_->AddFeaturesFromString(str.as_string(), &error_msg);
if (instruction_set_features_ == nullptr) {
LOG(WARNING) << "Error parsing " << option << " message=" << error_msg;
}
}
}
if (instruction_set_features_ == nullptr) {
instruction_set_features_ = InstructionSetFeatures::FromCppDefines();
}
compiler_driver_.reset(new CompilerDriver(
compiler_options_.get(),
/* verification_results */ nullptr,
Compiler::kOptimizing,
instruction_set,
instruction_set_features_.get(),
/* image_classes */ nullptr,
/* thread_count */ 1,
/* swap_fd */ -1,
/* profile_compilation_info */ nullptr));
// Disable dedupe so we can remove compiled methods.
compiler_driver_->SetDedupeEnabled(false);
compiler_driver_->SetSupportBootImageFixup(false);
size_t thread_count = compiler_driver_->GetThreadCount();
if (compiler_options_->GetGenerateDebugInfo()) {
DCHECK_EQ(thread_count, 1u)
<< "Generating debug info only works with one compiler thread";
jit_logger_.reset(new JitLogger());
jit_logger_->OpenLog();
}
}
JitCompiler::~JitCompiler() {
if (compiler_options_->GetGenerateDebugInfo()) {
jit_logger_->CloseLog();
}
}
bool JitCompiler::CompileMethod(Thread* self, ArtMethod* method, bool osr) {
SCOPED_TRACE << "JIT compiling " << method->PrettyMethod();
DCHECK(!method->IsProxyMethod());
DCHECK(method->GetDeclaringClass()->IsResolved());
TimingLogger logger(
"JIT compiler timing logger", true, VLOG_IS_ON(jit), TimingLogger::TimingKind::kThreadCpu);
self->AssertNoPendingException();
Runtime* runtime = Runtime::Current();
// Do the compilation.
bool success = false;
{
TimingLogger::ScopedTiming t2("Compiling", &logger);
JitCodeCache* const code_cache = runtime->GetJit()->GetCodeCache();
success = compiler_driver_->GetCompiler()->JitCompile(
self, code_cache, method, osr, jit_logger_.get());
}
// Trim maps to reduce memory usage.
// TODO: move this to an idle phase.
{
TimingLogger::ScopedTiming t2("TrimMaps", &logger);
runtime->GetJitArenaPool()->TrimMaps();
}
runtime->GetJit()->AddTimingLogger(logger);
return success;
}
} // namespace jit
} // namespace art
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