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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/string_view_cpp20.h"
#include "base/systrace.h"
#include "base/time_utils.h"
#include "base/timing_logger.h"
#include "compiler.h"
#include "debug/elf_debug_writer.h"
#include "driver/compiler_options.h"
#include "jit/debugger_interface.h"
#include "jit/jit.h"
#include "jit/jit_code_cache.h"
#include "jit/jit_logger.h"
namespace art {
namespace jit {
JitCompiler* JitCompiler::Create() {
return new JitCompiler();
}
void JitCompiler::ParseCompilerOptions() {
// Special case max code units for inlining, whose default is "unset" (implictly
// meaning no limit). Do this before parsing the actual passed options.
compiler_options_->SetInlineMaxCodeUnits(CompilerOptions::kDefaultInlineMaxCodeUnits);
Runtime* runtime = Runtime::Current();
{
std::string error_msg;
if (!compiler_options_->ParseCompilerOptions(runtime->GetCompilerOptions(),
/*ignore_unrecognized=*/ true,
&error_msg)) {
LOG(FATAL) << error_msg;
UNREACHABLE();
}
}
// JIT is never PIC, no matter what the runtime compiler options specify.
compiler_options_->SetNonPic();
// If the options don't provide whether we generate debuggable code, set
// debuggability based on the runtime value.
if (!compiler_options_->GetDebuggable()) {
compiler_options_->SetDebuggable(runtime->IsJavaDebuggable());
}
const InstructionSet instruction_set = compiler_options_->GetInstructionSet();
if (kRuntimeISA == InstructionSet::kArm) {
DCHECK_EQ(instruction_set, InstructionSet::kThumb2);
} else {
DCHECK_EQ(instruction_set, kRuntimeISA);
}
std::unique_ptr<const InstructionSetFeatures> instruction_set_features;
for (const std::string& option : runtime->GetCompilerOptions()) {
VLOG(compiler) << "JIT compiler option " << option;
std::string error_msg;
if (StartsWith(option, "--instruction-set-variant=")) {
const char* str = option.c_str() + strlen("--instruction-set-variant=");
VLOG(compiler) << "JIT instruction set variant " << str;
instruction_set_features = InstructionSetFeatures::FromVariant(
instruction_set, str, &error_msg);
if (instruction_set_features == nullptr) {
LOG(WARNING) << "Error parsing " << option << " message=" << error_msg;
}
} else if (StartsWith(option, "--instruction-set-features=")) {
const char* str = option.c_str() + strlen("--instruction-set-features=");
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, &error_msg);
if (instruction_set_features == nullptr) {
LOG(WARNING) << "Error parsing " << option << " message=" << error_msg;
}
}
}
if (instruction_set_features == nullptr) {
// '--instruction-set-features/--instruction-set-variant' were not used.
// Use build-time defined features.
instruction_set_features = InstructionSetFeatures::FromCppDefines();
}
compiler_options_->instruction_set_features_ = std::move(instruction_set_features);
compiler_options_->compiling_with_core_image_ =
CompilerOptions::IsCoreImageFilename(runtime->GetImageLocation());
if (compiler_options_->GetGenerateDebugInfo()) {
jit_logger_.reset(new JitLogger());
jit_logger_->OpenLog();
}
}
extern "C" JitCompilerInterface* jit_load() {
VLOG(jit) << "Create jit compiler";
auto* const jit_compiler = JitCompiler::Create();
CHECK(jit_compiler != nullptr);
VLOG(jit) << "Done creating jit compiler";
return jit_compiler;
}
void JitCompiler::TypesLoaded(mirror::Class** types, size_t count) {
const CompilerOptions& compiler_options = GetCompilerOptions();
if (compiler_options.GetGenerateDebugInfo()) {
InstructionSet isa = compiler_options.GetInstructionSet();
const InstructionSetFeatures* features = compiler_options.GetInstructionSetFeatures();
const ArrayRef<mirror::Class*> types_array(types, count);
std::vector<uint8_t> elf_file =
debug::WriteDebugElfFileForClasses(isa, features, types_array);
// NB: Don't allow packing since it would remove non-backtrace data.
MutexLock mu(Thread::Current(), *Locks::jit_lock_);
AddNativeDebugInfoForJit(/*code_ptr=*/ nullptr, elf_file, /*allow_packing=*/ false);
}
}
bool JitCompiler::GenerateDebugInfo() {
return GetCompilerOptions().GetGenerateDebugInfo();
}
std::vector<uint8_t> JitCompiler::PackElfFileForJIT(ArrayRef<const JITCodeEntry*> elf_files,
ArrayRef<const void*> removed_symbols,
bool compress,
/*out*/ size_t* num_symbols) {
return debug::PackElfFileForJIT(elf_files, removed_symbols, compress, num_symbols);
}
JitCompiler::JitCompiler() {
compiler_options_.reset(new CompilerOptions());
ParseCompilerOptions();
compiler_.reset(
Compiler::Create(*compiler_options_, /*storage=*/ nullptr, Compiler::kOptimizing));
}
JitCompiler::~JitCompiler() {
if (compiler_options_->GetGenerateDebugInfo()) {
jit_logger_->CloseLog();
}
}
bool JitCompiler::CompileMethod(
Thread* self, JitMemoryRegion* region, ArtMethod* method, bool baseline, bool osr) {
SCOPED_TRACE << "JIT compiling "
<< method->PrettyMethod()
<< " (baseline=" << baseline << ", osr=" << osr << ")";
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();
uint64_t start_ns = NanoTime();
success = compiler_->JitCompile(
self, code_cache, region, method, baseline, osr, jit_logger_.get());
uint64_t duration_ns = NanoTime() - start_ns;
VLOG(jit) << "Compilation of "
<< method->PrettyMethod()
<< " took "
<< PrettyDuration(duration_ns);
}
// 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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