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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 "arch/instruction_set.h"
#include "arch/instruction_set_features.h"
#include "art_method-inl.h"
#include "base/stringpiece.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 "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)
SHARED_REQUIRES(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)
SHARED_REQUIRES(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);
CreateJITCodeEntry(std::move(elf_file));
}
}
// Callers of this method assume it has NO_RETURN.
NO_RETURN static void Usage(const char* fmt, ...) {
va_list ap;
va_start(ap, fmt);
std::string error;
StringAppendV(&error, fmt, ap);
LOG(FATAL) << error;
va_end(ap);
exit(EXIT_FAILURE);
}
JitCompiler::JitCompiler() {
compiler_options_.reset(new CompilerOptions(
CompilerOptions::kDefaultCompilerFilter,
CompilerOptions::kDefaultHugeMethodThreshold,
CompilerOptions::kDefaultLargeMethodThreshold,
CompilerOptions::kDefaultSmallMethodThreshold,
CompilerOptions::kDefaultTinyMethodThreshold,
CompilerOptions::kDefaultNumDexMethodsThreshold,
CompilerOptions::kDefaultInlineDepthLimit,
CompilerOptions::kDefaultInlineMaxCodeUnits,
/* no_inline_from */ nullptr,
/* include_patch_information */ false,
CompilerOptions::kDefaultTopKProfileThreshold,
Runtime::Current()->IsDebuggable(),
CompilerOptions::kDefaultGenerateDebugInfo,
/* implicit_null_checks */ true,
/* implicit_so_checks */ true,
/* implicit_suspend_checks */ false,
/* pic */ true, // TODO: Support non-PIC in optimizing.
/* verbose_methods */ nullptr,
/* init_failure_output */ nullptr,
/* abort_on_hard_verifier_failure */ false,
/* dump_cfg_file_name */ "",
/* dump_cfg_append */ false,
/* force_determinism */ false));
for (const std::string& argument : Runtime::Current()->GetCompilerOptions()) {
compiler_options_->ParseCompilerOption(argument, Usage);
}
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_.reset(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_.get() == nullptr) {
instruction_set_features_.reset(InstructionSetFeatures::FromVariant(
instruction_set, "default", &error_msg));
if (instruction_set_features_ == nullptr) {
LOG(WARNING) << "Error parsing " << option << " message=" << error_msg;
}
}
instruction_set_features_.reset(
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_.reset(InstructionSetFeatures::FromCppDefines());
}
cumulative_logger_.reset(new CumulativeLogger("jit times"));
method_inliner_map_.reset(new DexFileToMethodInlinerMap);
compiler_driver_.reset(new CompilerDriver(
compiler_options_.get(),
/* verification_results */ nullptr,
method_inliner_map_.get(),
Compiler::kOptimizing,
instruction_set,
instruction_set_features_.get(),
/* boot_image */ false,
/* app_image */ false,
/* image_classes */ nullptr,
/* compiled_classes */ nullptr,
/* compiled_methods */ nullptr,
/* thread_count */ 1,
/* dump_stats */ false,
/* dump_passes */ false,
cumulative_logger_.get(),
/* 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()) {
#ifdef __ANDROID__
const char* prefix = "/data/misc/trace";
#else
const char* prefix = "/tmp";
#endif
DCHECK_EQ(thread_count, 1u)
<< "Generating debug info only works with one compiler thread";
std::string perf_filename = std::string(prefix) + "/perf-" + std::to_string(getpid()) + ".map";
perf_file_.reset(OS::CreateEmptyFileWriteOnly(perf_filename.c_str()));
if (perf_file_ == nullptr) {
LOG(ERROR) << "Could not create perf file at " << perf_filename <<
" Are you on a user build? Perf only works on userdebug/eng builds";
}
}
size_t inline_depth_limit = compiler_driver_->GetCompilerOptions().GetInlineDepthLimit();
DCHECK_LT(thread_count * inline_depth_limit, std::numeric_limits<uint16_t>::max())
<< "ProfilingInfo's inline counter can potentially overflow";
}
JitCompiler::~JitCompiler() {
if (perf_file_ != nullptr) {
UNUSED(perf_file_->Flush());
UNUSED(perf_file_->Close());
}
}
bool JitCompiler::CompileMethod(Thread* self, ArtMethod* method, bool osr) {
DCHECK(!method->IsProxyMethod());
TimingLogger logger("JIT compiler timing logger", true, VLOG_IS_ON(jit));
StackHandleScope<2> hs(self);
self->AssertNoPendingException();
Runtime* runtime = Runtime::Current();
// Ensure the class is initialized.
Handle<mirror::Class> h_class(hs.NewHandle(method->GetDeclaringClass()));
if (!runtime->GetClassLinker()->EnsureInitialized(self, h_class, true, true)) {
VLOG(jit) << "JIT failed to initialize " << PrettyMethod(method);
return false;
}
// 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);
if (success && (perf_file_ != nullptr)) {
const void* ptr = method->GetEntryPointFromQuickCompiledCode();
std::ostringstream stream;
stream << std::hex
<< reinterpret_cast<uintptr_t>(ptr)
<< " "
<< code_cache->GetMemorySizeOfCodePointer(ptr)
<< " "
<< PrettyMethod(method)
<< std::endl;
std::string str = stream.str();
bool res = perf_file_->WriteFully(str.c_str(), str.size());
CHECK(res);
}
}
// 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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