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compiler.cc
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compiler.cc
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// Copyright 2012 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "src/codegen/compiler.h"
#include <algorithm>
#include <memory>
#include "src/api/api-inl.h"
#include "src/asmjs/asm-js.h"
#include "src/ast/prettyprinter.h"
#include "src/ast/scopes.h"
#include "src/base/logging.h"
#include "src/base/optional.h"
#include "src/base/platform/time.h"
#include "src/baseline/baseline.h"
#include "src/codegen/assembler-inl.h"
#include "src/codegen/compilation-cache.h"
#include "src/codegen/optimized-compilation-info.h"
#include "src/codegen/pending-optimization-table.h"
#include "src/codegen/script-details.h"
#include "src/codegen/unoptimized-compilation-info.h"
#include "src/common/assert-scope.h"
#include "src/common/globals.h"
#include "src/common/message-template.h"
#include "src/compiler-dispatcher/lazy-compile-dispatcher.h"
#include "src/compiler-dispatcher/optimizing-compile-dispatcher.h"
#include "src/compiler/pipeline.h"
#include "src/debug/debug.h"
#include "src/debug/liveedit.h"
#include "src/diagnostics/code-tracer.h"
#include "src/execution/frames-inl.h"
#include "src/execution/isolate-inl.h"
#include "src/execution/isolate.h"
#include "src/execution/local-isolate.h"
#include "src/execution/runtime-profiler.h"
#include "src/execution/vm-state-inl.h"
#include "src/handles/maybe-handles.h"
#include "src/heap/heap-inl.h"
#include "src/heap/local-factory-inl.h"
#include "src/heap/local-heap-inl.h"
#include "src/heap/local-heap.h"
#include "src/heap/parked-scope.h"
#include "src/init/bootstrapper.h"
#include "src/interpreter/interpreter.h"
#include "src/logging/counters-scopes.h"
#include "src/logging/log-inl.h"
#include "src/logging/runtime-call-stats-scope.h"
#include "src/objects/feedback-cell-inl.h"
#include "src/objects/js-function-inl.h"
#include "src/objects/map.h"
#include "src/objects/object-list-macros.h"
#include "src/objects/shared-function-info.h"
#include "src/objects/string.h"
#include "src/parsing/parse-info.h"
#include "src/parsing/parser.h"
#include "src/parsing/parsing.h"
#include "src/parsing/pending-compilation-error-handler.h"
#include "src/parsing/scanner-character-streams.h"
#include "src/snapshot/code-serializer.h"
#include "src/utils/ostreams.h"
#include "src/zone/zone-list-inl.h" // crbug.com/v8/8816
namespace v8 {
namespace internal {
namespace {
class CompilerTracer : public AllStatic {
public:
static void TracePrepareJob(Isolate* isolate, OptimizedCompilationInfo* info,
const char* compiler_name) {
if (!FLAG_trace_opt || !info->IsOptimizing()) return;
CodeTracer::Scope scope(isolate->GetCodeTracer());
PrintTracePrefix(scope, "compiling method", info);
PrintF(scope.file(), " using %s%s", compiler_name,
info->is_osr() ? " OSR" : "");
PrintTraceSuffix(scope);
}
static void TraceStartBaselineCompile(Isolate* isolate,
Handle<SharedFunctionInfo> shared) {
if (!FLAG_trace_baseline) return;
CodeTracer::Scope scope(isolate->GetCodeTracer());
PrintTracePrefix(scope, "compiling method", shared, CodeKind::BASELINE);
PrintF(scope.file(), " using Sparkplug");
PrintTraceSuffix(scope);
}
static void TraceCompilationStats(Isolate* isolate,
OptimizedCompilationInfo* info,
double ms_creategraph, double ms_optimize,
double ms_codegen) {
if (!FLAG_trace_opt || !info->IsOptimizing()) return;
CodeTracer::Scope scope(isolate->GetCodeTracer());
PrintTracePrefix(scope, "optimizing", info);
PrintF(scope.file(), " - took %0.3f, %0.3f, %0.3f ms", ms_creategraph,
ms_optimize, ms_codegen);
PrintTraceSuffix(scope);
}
static void TraceFinishBaselineCompile(Isolate* isolate,
Handle<SharedFunctionInfo> shared,
double ms_timetaken) {
if (!FLAG_trace_baseline) return;
CodeTracer::Scope scope(isolate->GetCodeTracer());
PrintTracePrefix(scope, "compiling", shared, CodeKind::BASELINE);
PrintF(scope.file(), " - took %0.3f ms", ms_timetaken);
PrintTraceSuffix(scope);
}
static void TraceCompletedJob(Isolate* isolate,
OptimizedCompilationInfo* info) {
if (!FLAG_trace_opt) return;
CodeTracer::Scope scope(isolate->GetCodeTracer());
PrintTracePrefix(scope, "completed optimizing", info);
PrintTraceSuffix(scope);
}
static void TraceAbortedJob(Isolate* isolate,
OptimizedCompilationInfo* info) {
if (!FLAG_trace_opt) return;
CodeTracer::Scope scope(isolate->GetCodeTracer());
PrintTracePrefix(scope, "aborted optimizing", info);
PrintF(scope.file(), " because: %s",
GetBailoutReason(info->bailout_reason()));
PrintTraceSuffix(scope);
}
static void TraceOptimizedCodeCacheHit(Isolate* isolate,
Handle<JSFunction> function,
BytecodeOffset osr_offset,
CodeKind code_kind) {
if (!FLAG_trace_opt) return;
CodeTracer::Scope scope(isolate->GetCodeTracer());
PrintTracePrefix(scope, "found optimized code for", function, code_kind);
if (!osr_offset.IsNone()) {
PrintF(scope.file(), " at OSR bytecode offset %d", osr_offset.ToInt());
}
PrintTraceSuffix(scope);
}
static void TraceOptimizeForAlwaysOpt(Isolate* isolate,
Handle<JSFunction> function,
CodeKind code_kind) {
if (!FLAG_trace_opt) return;
CodeTracer::Scope scope(isolate->GetCodeTracer());
PrintTracePrefix(scope, "optimizing", function, code_kind);
PrintF(scope.file(), " because --always-opt");
PrintTraceSuffix(scope);
}
static void TraceMarkForAlwaysOpt(Isolate* isolate,
Handle<JSFunction> function) {
if (!FLAG_trace_opt) return;
CodeTracer::Scope scope(isolate->GetCodeTracer());
PrintF(scope.file(), "[marking ");
function->ShortPrint(scope.file());
PrintF(scope.file(), " for optimized recompilation because --always-opt");
PrintF(scope.file(), "]\n");
}
private:
static void PrintTracePrefix(const CodeTracer::Scope& scope,
const char* header,
OptimizedCompilationInfo* info) {
PrintTracePrefix(scope, header, info->closure(), info->code_kind());
}
static void PrintTracePrefix(const CodeTracer::Scope& scope,
const char* header, Handle<JSFunction> function,
CodeKind code_kind) {
PrintF(scope.file(), "[%s ", header);
function->ShortPrint(scope.file());
PrintF(scope.file(), " (target %s)", CodeKindToString(code_kind));
}
static void PrintTracePrefix(const CodeTracer::Scope& scope,
const char* header,
Handle<SharedFunctionInfo> shared,
CodeKind code_kind) {
PrintF(scope.file(), "[%s ", header);
shared->ShortPrint(scope.file());
PrintF(scope.file(), " (target %s)", CodeKindToString(code_kind));
}
static void PrintTraceSuffix(const CodeTracer::Scope& scope) {
PrintF(scope.file(), "]\n");
}
};
} // namespace
// Helper that times a scoped region and records the elapsed time.
struct ScopedTimer {
explicit ScopedTimer(base::TimeDelta* location) : location_(location) {
DCHECK_NOT_NULL(location_);
timer_.Start();
}
~ScopedTimer() { *location_ += timer_.Elapsed(); }
base::ElapsedTimer timer_;
base::TimeDelta* location_;
};
// static
void Compiler::LogFunctionCompilation(Isolate* isolate,
CodeEventListener::LogEventsAndTags tag,
Handle<SharedFunctionInfo> shared,
Handle<Script> script,
Handle<AbstractCode> abstract_code,
CodeKind kind, double time_taken_ms) {
DCHECK(!abstract_code.is_null());
DCHECK(!abstract_code.is_identical_to(BUILTIN_CODE(isolate, CompileLazy)));
// Log the code generation. If source information is available include
// script name and line number. Check explicitly whether logging is
// enabled as finding the line number is not free.
if (!isolate->logger()->is_listening_to_code_events() &&
!isolate->is_profiling() && !FLAG_log_function_events &&
!isolate->code_event_dispatcher()->IsListeningToCodeEvents()) {
return;
}
int line_num = Script::GetLineNumber(script, shared->StartPosition()) + 1;
int column_num = Script::GetColumnNumber(script, shared->StartPosition()) + 1;
Handle<String> script_name(script->name().IsString()
? String::cast(script->name())
: ReadOnlyRoots(isolate).empty_string(),
isolate);
CodeEventListener::LogEventsAndTags log_tag =
Logger::ToNativeByScript(tag, *script);
PROFILE(isolate, CodeCreateEvent(log_tag, abstract_code, shared, script_name,
line_num, column_num));
if (!FLAG_log_function_events) return;
std::string name;
switch (kind) {
case CodeKind::INTERPRETED_FUNCTION:
name = "interpreter";
break;
case CodeKind::BASELINE:
name = "baseline";
break;
case CodeKind::TURBOPROP:
name = "turboprop";
break;
case CodeKind::TURBOFAN:
name = "optimize";
break;
default:
UNREACHABLE();
}
switch (tag) {
case CodeEventListener::EVAL_TAG:
name += "-eval";
break;
case CodeEventListener::SCRIPT_TAG:
break;
case CodeEventListener::LAZY_COMPILE_TAG:
name += "-lazy";
break;
case CodeEventListener::FUNCTION_TAG:
break;
default:
UNREACHABLE();
}
Handle<String> debug_name = SharedFunctionInfo::DebugName(shared);
DisallowGarbageCollection no_gc;
LOG(isolate, FunctionEvent(name.c_str(), script->id(), time_taken_ms,
shared->StartPosition(), shared->EndPosition(),
*debug_name));
}
namespace {
ScriptOriginOptions OriginOptionsForEval(Object script) {
if (!script.IsScript()) return ScriptOriginOptions();
const auto outer_origin_options = Script::cast(script).origin_options();
return ScriptOriginOptions(outer_origin_options.IsSharedCrossOrigin(),
outer_origin_options.IsOpaque());
}
} // namespace
// ----------------------------------------------------------------------------
// Implementation of UnoptimizedCompilationJob
CompilationJob::Status UnoptimizedCompilationJob::ExecuteJob() {
// Delegate to the underlying implementation.
DCHECK_EQ(state(), State::kReadyToExecute);
ScopedTimer t(&time_taken_to_execute_);
return UpdateState(ExecuteJobImpl(), State::kReadyToFinalize);
}
CompilationJob::Status UnoptimizedCompilationJob::FinalizeJob(
Handle<SharedFunctionInfo> shared_info, Isolate* isolate) {
DCHECK_EQ(ThreadId::Current(), isolate->thread_id());
DisallowCodeDependencyChange no_dependency_change;
DisallowJavascriptExecution no_js(isolate);
// Delegate to the underlying implementation.
DCHECK_EQ(state(), State::kReadyToFinalize);
ScopedTimer t(&time_taken_to_finalize_);
return UpdateState(FinalizeJobImpl(shared_info, isolate), State::kSucceeded);
}
CompilationJob::Status UnoptimizedCompilationJob::FinalizeJob(
Handle<SharedFunctionInfo> shared_info, LocalIsolate* isolate) {
// Delegate to the underlying implementation.
DCHECK_EQ(state(), State::kReadyToFinalize);
ScopedTimer t(&time_taken_to_finalize_);
return UpdateState(FinalizeJobImpl(shared_info, isolate), State::kSucceeded);
}
namespace {
void RecordUnoptimizedCompilationStats(Isolate* isolate,
Handle<SharedFunctionInfo> shared_info) {
#if V8_ENABLE_WEBASSEMBLY
int code_size =
shared_info->HasBytecodeArray()
? shared_info->GetBytecodeArray(isolate).SizeIncludingMetadata()
: shared_info->asm_wasm_data().Size();
#else
int code_size =
shared_info->GetBytecodeArray(isolate).SizeIncludingMetadata();
#endif // V8_ENABLE_WEBASSEMBLY
Counters* counters = isolate->counters();
// TODO(4280): Rename counters from "baseline" to "unoptimized" eventually.
counters->total_baseline_code_size()->Increment(code_size);
counters->total_baseline_compile_count()->Increment(1);
// TODO(5203): Add timers for each phase of compilation.
// Also add total time (there's now already timer_ on the base class).
}
void RecordUnoptimizedFunctionCompilation(
Isolate* isolate, CodeEventListener::LogEventsAndTags tag,
Handle<SharedFunctionInfo> shared, base::TimeDelta time_taken_to_execute,
base::TimeDelta time_taken_to_finalize) {
Handle<AbstractCode> abstract_code;
if (shared->HasBytecodeArray()) {
abstract_code =
handle(AbstractCode::cast(shared->GetBytecodeArray(isolate)), isolate);
} else {
#if V8_ENABLE_WEBASSEMBLY
DCHECK(shared->HasAsmWasmData());
abstract_code =
Handle<AbstractCode>::cast(BUILTIN_CODE(isolate, InstantiateAsmJs));
#else
UNREACHABLE();
#endif // V8_ENABLE_WEBASSEMBLY
}
double time_taken_ms = time_taken_to_execute.InMillisecondsF() +
time_taken_to_finalize.InMillisecondsF();
Handle<Script> script(Script::cast(shared->script()), isolate);
Compiler::LogFunctionCompilation(isolate, tag, shared, script, abstract_code,
CodeKind::INTERPRETED_FUNCTION,
time_taken_ms);
}
} // namespace
// ----------------------------------------------------------------------------
// Implementation of OptimizedCompilationJob
CompilationJob::Status OptimizedCompilationJob::PrepareJob(Isolate* isolate) {
DCHECK_EQ(ThreadId::Current(), isolate->thread_id());
DisallowJavascriptExecution no_js(isolate);
CompilerTracer::TracePrepareJob(isolate, compilation_info(), compiler_name_);
// Delegate to the underlying implementation.
DCHECK_EQ(state(), State::kReadyToPrepare);
ScopedTimer t(&time_taken_to_prepare_);
return UpdateState(PrepareJobImpl(isolate), State::kReadyToExecute);
}
CompilationJob::Status OptimizedCompilationJob::ExecuteJob(
RuntimeCallStats* stats, LocalIsolate* local_isolate) {
DCHECK_IMPLIES(local_isolate, local_isolate->heap()->IsParked());
// Delegate to the underlying implementation.
DCHECK_EQ(state(), State::kReadyToExecute);
ScopedTimer t(&time_taken_to_execute_);
return UpdateState(ExecuteJobImpl(stats, local_isolate),
State::kReadyToFinalize);
}
CompilationJob::Status OptimizedCompilationJob::FinalizeJob(Isolate* isolate) {
DCHECK_EQ(ThreadId::Current(), isolate->thread_id());
DisallowJavascriptExecution no_js(isolate);
// Delegate to the underlying implementation.
DCHECK_EQ(state(), State::kReadyToFinalize);
ScopedTimer t(&time_taken_to_finalize_);
return UpdateState(FinalizeJobImpl(isolate), State::kSucceeded);
}
CompilationJob::Status OptimizedCompilationJob::RetryOptimization(
BailoutReason reason) {
DCHECK(compilation_info_->IsOptimizing());
compilation_info_->RetryOptimization(reason);
return UpdateState(FAILED, State::kFailed);
}
CompilationJob::Status OptimizedCompilationJob::AbortOptimization(
BailoutReason reason) {
DCHECK(compilation_info_->IsOptimizing());
compilation_info_->AbortOptimization(reason);
return UpdateState(FAILED, State::kFailed);
}
void OptimizedCompilationJob::RecordCompilationStats(CompilationMode mode,
Isolate* isolate) const {
DCHECK(compilation_info()->IsOptimizing());
Handle<JSFunction> function = compilation_info()->closure();
double ms_creategraph = time_taken_to_prepare_.InMillisecondsF();
double ms_optimize = time_taken_to_execute_.InMillisecondsF();
double ms_codegen = time_taken_to_finalize_.InMillisecondsF();
CompilerTracer::TraceCompilationStats(
isolate, compilation_info(), ms_creategraph, ms_optimize, ms_codegen);
if (FLAG_trace_opt_stats) {
static double compilation_time = 0.0;
static int compiled_functions = 0;
static int code_size = 0;
compilation_time += (ms_creategraph + ms_optimize + ms_codegen);
compiled_functions++;
code_size += function->shared().SourceSize();
PrintF("Compiled: %d functions with %d byte source size in %fms.\n",
compiled_functions, code_size, compilation_time);
}
// Don't record samples from machines without high-resolution timers,
// as that can cause serious reporting issues. See the thread at
// http://g/chrome-metrics-team/NwwJEyL8odU/discussion for more details.
if (base::TimeTicks::IsHighResolution()) {
Counters* const counters = isolate->counters();
if (compilation_info()->is_osr()) {
counters->turbofan_osr_prepare()->AddSample(
static_cast<int>(time_taken_to_prepare_.InMicroseconds()));
counters->turbofan_osr_execute()->AddSample(
static_cast<int>(time_taken_to_execute_.InMicroseconds()));
counters->turbofan_osr_finalize()->AddSample(
static_cast<int>(time_taken_to_finalize_.InMicroseconds()));
counters->turbofan_osr_total_time()->AddSample(
static_cast<int>(ElapsedTime().InMicroseconds()));
} else {
counters->turbofan_optimize_prepare()->AddSample(
static_cast<int>(time_taken_to_prepare_.InMicroseconds()));
counters->turbofan_optimize_execute()->AddSample(
static_cast<int>(time_taken_to_execute_.InMicroseconds()));
counters->turbofan_optimize_finalize()->AddSample(
static_cast<int>(time_taken_to_finalize_.InMicroseconds()));
counters->turbofan_optimize_total_time()->AddSample(
static_cast<int>(ElapsedTime().InMicroseconds()));
// Compute foreground / background time.
base::TimeDelta time_background;
base::TimeDelta time_foreground =
time_taken_to_prepare_ + time_taken_to_finalize_;
switch (mode) {
case OptimizedCompilationJob::kConcurrent:
time_background += time_taken_to_execute_;
counters->turbofan_optimize_concurrent_total_time()->AddSample(
static_cast<int>(ElapsedTime().InMicroseconds()));
break;
case OptimizedCompilationJob::kSynchronous:
counters->turbofan_optimize_non_concurrent_total_time()->AddSample(
static_cast<int>(ElapsedTime().InMicroseconds()));
time_foreground += time_taken_to_execute_;
break;
}
counters->turbofan_optimize_total_background()->AddSample(
static_cast<int>(time_background.InMicroseconds()));
counters->turbofan_optimize_total_foreground()->AddSample(
static_cast<int>(time_foreground.InMicroseconds()));
}
counters->turbofan_ticks()->AddSample(static_cast<int>(
compilation_info()->tick_counter().CurrentTicks() / 1000));
}
}
void OptimizedCompilationJob::RecordFunctionCompilation(
CodeEventListener::LogEventsAndTags tag, Isolate* isolate) const {
Handle<AbstractCode> abstract_code =
Handle<AbstractCode>::cast(compilation_info()->code());
double time_taken_ms = time_taken_to_prepare_.InMillisecondsF() +
time_taken_to_execute_.InMillisecondsF() +
time_taken_to_finalize_.InMillisecondsF();
Handle<Script> script(
Script::cast(compilation_info()->shared_info()->script()), isolate);
Compiler::LogFunctionCompilation(
isolate, tag, compilation_info()->shared_info(), script, abstract_code,
compilation_info()->code_kind(), time_taken_ms);
}
// ----------------------------------------------------------------------------
// Local helper methods that make up the compilation pipeline.
namespace {
#if V8_ENABLE_WEBASSEMBLY
bool UseAsmWasm(FunctionLiteral* literal, bool asm_wasm_broken) {
// Check whether asm.js validation is enabled.
if (!FLAG_validate_asm) return false;
// Modules that have validated successfully, but were subsequently broken by
// invalid module instantiation attempts are off limit forever.
if (asm_wasm_broken) return false;
// In stress mode we want to run the validator on everything.
if (FLAG_stress_validate_asm) return true;
// In general, we respect the "use asm" directive.
return literal->scope()->IsAsmModule();
}
#endif
void InstallInterpreterTrampolineCopy(
Isolate* isolate, Handle<SharedFunctionInfo> shared_info,
CodeEventListener::LogEventsAndTags log_tag) {
DCHECK(FLAG_interpreted_frames_native_stack);
if (!shared_info->function_data(kAcquireLoad).IsBytecodeArray()) {
DCHECK(!shared_info->HasBytecodeArray());
return;
}
Handle<BytecodeArray> bytecode_array(shared_info->GetBytecodeArray(isolate),
isolate);
Handle<Code> code = isolate->factory()->CopyCode(Handle<Code>::cast(
isolate->factory()->interpreter_entry_trampoline_for_profiling()));
Handle<InterpreterData> interpreter_data =
Handle<InterpreterData>::cast(isolate->factory()->NewStruct(
INTERPRETER_DATA_TYPE, AllocationType::kOld));
interpreter_data->set_bytecode_array(*bytecode_array);
interpreter_data->set_interpreter_trampoline(*code);
shared_info->set_interpreter_data(*interpreter_data);
Handle<Script> script(Script::cast(shared_info->script()), isolate);
Handle<AbstractCode> abstract_code = Handle<AbstractCode>::cast(code);
int line_num =
Script::GetLineNumber(script, shared_info->StartPosition()) + 1;
int column_num =
Script::GetColumnNumber(script, shared_info->StartPosition()) + 1;
Handle<String> script_name =
handle(script->name().IsString() ? String::cast(script->name())
: ReadOnlyRoots(isolate).empty_string(),
isolate);
PROFILE(isolate, CodeCreateEvent(log_tag, abstract_code, shared_info,
script_name, line_num, column_num));
}
template <typename IsolateT>
void InstallUnoptimizedCode(UnoptimizedCompilationInfo* compilation_info,
Handle<SharedFunctionInfo> shared_info,
IsolateT* isolate) {
if (compilation_info->has_bytecode_array()) {
DCHECK(!shared_info->HasBytecodeArray()); // Only compiled once.
DCHECK(!compilation_info->has_asm_wasm_data());
DCHECK(!shared_info->HasFeedbackMetadata());
#if V8_ENABLE_WEBASSEMBLY
// If the function failed asm-wasm compilation, mark asm_wasm as broken
// to ensure we don't try to compile as asm-wasm.
if (compilation_info->literal()->scope()->IsAsmModule()) {
shared_info->set_is_asm_wasm_broken(true);
}
#endif // V8_ENABLE_WEBASSEMBLY
shared_info->set_bytecode_array(*compilation_info->bytecode_array());
Handle<FeedbackMetadata> feedback_metadata = FeedbackMetadata::New(
isolate, compilation_info->feedback_vector_spec());
shared_info->set_feedback_metadata(*feedback_metadata, kReleaseStore);
} else {
#if V8_ENABLE_WEBASSEMBLY
DCHECK(compilation_info->has_asm_wasm_data());
// We should only have asm/wasm data when finalizing on the main thread.
DCHECK((std::is_same<IsolateT, Isolate>::value));
shared_info->set_asm_wasm_data(*compilation_info->asm_wasm_data());
shared_info->set_feedback_metadata(
ReadOnlyRoots(isolate).empty_feedback_metadata(), kReleaseStore);
#else
UNREACHABLE();
#endif // V8_ENABLE_WEBASSEMBLY
}
}
void LogUnoptimizedCompilation(Isolate* isolate,
Handle<SharedFunctionInfo> shared_info,
CodeEventListener::LogEventsAndTags log_tag,
base::TimeDelta time_taken_to_execute,
base::TimeDelta time_taken_to_finalize) {
RecordUnoptimizedFunctionCompilation(isolate, log_tag, shared_info,
time_taken_to_execute,
time_taken_to_finalize);
RecordUnoptimizedCompilationStats(isolate, shared_info);
}
template <typename IsolateT>
void EnsureSharedFunctionInfosArrayOnScript(Handle<Script> script,
ParseInfo* parse_info,
IsolateT* isolate) {
DCHECK(parse_info->flags().is_toplevel());
if (script->shared_function_info_count() > 0) {
DCHECK_LE(script->shared_function_info_count(),
script->shared_function_infos().length());
DCHECK_EQ(script->shared_function_info_count(),
parse_info->max_function_literal_id() + 1);
return;
}
Handle<WeakFixedArray> infos(isolate->factory()->NewWeakFixedArray(
parse_info->max_function_literal_id() + 1, AllocationType::kOld));
script->set_shared_function_infos(*infos);
}
void UpdateSharedFunctionFlagsAfterCompilation(FunctionLiteral* literal,
SharedFunctionInfo shared_info) {
DCHECK_EQ(shared_info.language_mode(), literal->language_mode());
shared_info.set_has_duplicate_parameters(literal->has_duplicate_parameters());
shared_info.UpdateAndFinalizeExpectedNofPropertiesFromEstimate(literal);
if (literal->dont_optimize_reason() != BailoutReason::kNoReason) {
shared_info.DisableOptimization(literal->dont_optimize_reason());
}
shared_info.set_class_scope_has_private_brand(
literal->class_scope_has_private_brand());
shared_info.set_has_static_private_methods_or_accessors(
literal->has_static_private_methods_or_accessors());
shared_info.SetScopeInfo(*literal->scope()->scope_info());
}
// Finalize a single compilation job. This function can return
// RETRY_ON_MAIN_THREAD if the job cannot be finalized off-thread, in which case
// it should be safe to call it again on the main thread with the same job.
template <typename IsolateT>
CompilationJob::Status FinalizeSingleUnoptimizedCompilationJob(
UnoptimizedCompilationJob* job, Handle<SharedFunctionInfo> shared_info,
IsolateT* isolate,
FinalizeUnoptimizedCompilationDataList*
finalize_unoptimized_compilation_data_list) {
UnoptimizedCompilationInfo* compilation_info = job->compilation_info();
CompilationJob::Status status = job->FinalizeJob(shared_info, isolate);
if (status == CompilationJob::SUCCEEDED) {
InstallUnoptimizedCode(compilation_info, shared_info, isolate);
MaybeHandle<CoverageInfo> coverage_info;
if (compilation_info->has_coverage_info() &&
!shared_info->HasCoverageInfo()) {
coverage_info = compilation_info->coverage_info();
}
finalize_unoptimized_compilation_data_list->emplace_back(
isolate, shared_info, coverage_info, job->time_taken_to_execute(),
job->time_taken_to_finalize());
}
DCHECK_IMPLIES(status == CompilationJob::RETRY_ON_MAIN_THREAD,
(std::is_same<IsolateT, LocalIsolate>::value));
return status;
}
std::unique_ptr<UnoptimizedCompilationJob>
ExecuteSingleUnoptimizedCompilationJob(
ParseInfo* parse_info, FunctionLiteral* literal,
AccountingAllocator* allocator,
std::vector<FunctionLiteral*>* eager_inner_literals,
LocalIsolate* local_isolate) {
#if V8_ENABLE_WEBASSEMBLY
if (UseAsmWasm(literal, parse_info->flags().is_asm_wasm_broken())) {
std::unique_ptr<UnoptimizedCompilationJob> asm_job(
AsmJs::NewCompilationJob(parse_info, literal, allocator));
if (asm_job->ExecuteJob() == CompilationJob::SUCCEEDED) {
return asm_job;
}
// asm.js validation failed, fall through to standard unoptimized compile.
// Note: we rely on the fact that AsmJs jobs have done all validation in the
// PrepareJob and ExecuteJob phases and can't fail in FinalizeJob with
// with a validation error or another error that could be solve by falling
// through to standard unoptimized compile.
}
#endif
std::unique_ptr<UnoptimizedCompilationJob> job(
interpreter::Interpreter::NewCompilationJob(
parse_info, literal, allocator, eager_inner_literals, local_isolate));
if (job->ExecuteJob() != CompilationJob::SUCCEEDED) {
// Compilation failed, return null.
return std::unique_ptr<UnoptimizedCompilationJob>();
}
return job;
}
bool RecursivelyExecuteUnoptimizedCompilationJobs(
ParseInfo* parse_info, FunctionLiteral* literal,
AccountingAllocator* allocator,
UnoptimizedCompilationJobList* function_jobs) {
std::vector<FunctionLiteral*> eager_inner_literals;
// We need to pass nullptr here because we are on the background
// thread but don't have a LocalIsolate.
DCHECK_NULL(LocalHeap::Current());
std::unique_ptr<UnoptimizedCompilationJob> job =
ExecuteSingleUnoptimizedCompilationJob(parse_info, literal, allocator,
&eager_inner_literals, nullptr);
if (!job) return false;
// Recursively compile eager inner literals.
for (FunctionLiteral* inner_literal : eager_inner_literals) {
if (!RecursivelyExecuteUnoptimizedCompilationJobs(
parse_info, inner_literal, allocator, function_jobs)) {
return false;
}
}
function_jobs->emplace_front(std::move(job));
return true;
}
template <typename IsolateT>
bool IterativelyExecuteAndFinalizeUnoptimizedCompilationJobs(
IsolateT* isolate, Handle<SharedFunctionInfo> outer_shared_info,
Handle<Script> script, ParseInfo* parse_info,
AccountingAllocator* allocator, IsCompiledScope* is_compiled_scope,
FinalizeUnoptimizedCompilationDataList*
finalize_unoptimized_compilation_data_list,
DeferredFinalizationJobDataList*
jobs_to_retry_finalization_on_main_thread) {
DeclarationScope::AllocateScopeInfos(parse_info, isolate);
std::vector<FunctionLiteral*> functions_to_compile;
functions_to_compile.push_back(parse_info->literal());
while (!functions_to_compile.empty()) {
FunctionLiteral* literal = functions_to_compile.back();
functions_to_compile.pop_back();
Handle<SharedFunctionInfo> shared_info =
Compiler::GetSharedFunctionInfo(literal, script, isolate);
if (shared_info->is_compiled()) continue;
std::unique_ptr<UnoptimizedCompilationJob> job =
ExecuteSingleUnoptimizedCompilationJob(parse_info, literal, allocator,
&functions_to_compile,
isolate->AsLocalIsolate());
if (!job) return false;
UpdateSharedFunctionFlagsAfterCompilation(literal, *shared_info);
auto finalization_status = FinalizeSingleUnoptimizedCompilationJob(
job.get(), shared_info, isolate,
finalize_unoptimized_compilation_data_list);
switch (finalization_status) {
case CompilationJob::SUCCEEDED:
if (shared_info.is_identical_to(outer_shared_info)) {
// Ensure that the top level function is retained.
*is_compiled_scope = shared_info->is_compiled_scope(isolate);
DCHECK(is_compiled_scope->is_compiled());
}
break;
case CompilationJob::FAILED:
return false;
case CompilationJob::RETRY_ON_MAIN_THREAD:
// This should not happen on the main thread.
DCHECK((!std::is_same<IsolateT, Isolate>::value));
DCHECK_NOT_NULL(jobs_to_retry_finalization_on_main_thread);
// Clear the literal and ParseInfo to prevent further attempts to
// access them.
job->compilation_info()->ClearLiteral();
job->ClearParseInfo();
jobs_to_retry_finalization_on_main_thread->emplace_back(
isolate, shared_info, std::move(job));
break;
}
}
// Report any warnings generated during compilation.
if (parse_info->pending_error_handler()->has_pending_warnings()) {
parse_info->pending_error_handler()->PrepareWarnings(isolate);
}
return true;
}
bool FinalizeAllUnoptimizedCompilationJobs(
ParseInfo* parse_info, Isolate* isolate, Handle<Script> script,
UnoptimizedCompilationJobList* compilation_jobs,
FinalizeUnoptimizedCompilationDataList*
finalize_unoptimized_compilation_data_list) {
DCHECK(AllowCompilation::IsAllowed(isolate));
DCHECK(!compilation_jobs->empty());
// TODO(rmcilroy): Clear native context in debug once AsmJS generates doesn't
// rely on accessing native context during finalization.
// Allocate scope infos for the literal.
DeclarationScope::AllocateScopeInfos(parse_info, isolate);
// Finalize the functions' compilation jobs.
for (auto&& job : *compilation_jobs) {
FunctionLiteral* literal = job->compilation_info()->literal();
Handle<SharedFunctionInfo> shared_info =
Compiler::GetSharedFunctionInfo(literal, script, isolate);
// The inner function might be compiled already if compiling for debug.
if (shared_info->is_compiled()) continue;
UpdateSharedFunctionFlagsAfterCompilation(literal, *shared_info);
if (FinalizeSingleUnoptimizedCompilationJob(
job.get(), shared_info, isolate,
finalize_unoptimized_compilation_data_list) !=
CompilationJob::SUCCEEDED) {
return false;
}
}
// Report any warnings generated during compilation.
if (parse_info->pending_error_handler()->has_pending_warnings()) {
parse_info->pending_error_handler()->PrepareWarnings(isolate);
}
return true;
}
bool FinalizeDeferredUnoptimizedCompilationJobs(
Isolate* isolate, Handle<Script> script,
DeferredFinalizationJobDataList* deferred_jobs,
PendingCompilationErrorHandler* pending_error_handler,
FinalizeUnoptimizedCompilationDataList*
finalize_unoptimized_compilation_data_list) {
DCHECK(AllowCompilation::IsAllowed(isolate));
if (deferred_jobs->empty()) return true;
// TODO(rmcilroy): Clear native context in debug once AsmJS generates doesn't
// rely on accessing native context during finalization.
// Finalize the deferred compilation jobs.
for (auto&& job : *deferred_jobs) {
Handle<SharedFunctionInfo> shared_info = job.function_handle();
if (FinalizeSingleUnoptimizedCompilationJob(
job.job(), shared_info, isolate,
finalize_unoptimized_compilation_data_list) !=
CompilationJob::SUCCEEDED) {
return false;
}
}
// Report any warnings generated during deferred finalization.
if (pending_error_handler->has_pending_warnings()) {
pending_error_handler->PrepareWarnings(isolate);
}
return true;
}
V8_WARN_UNUSED_RESULT MaybeHandle<Code> GetCodeFromOptimizedCodeCache(
Handle<JSFunction> function, BytecodeOffset osr_offset,
CodeKind code_kind) {
Isolate* isolate = function->GetIsolate();
RCS_SCOPE(isolate, RuntimeCallCounterId::kCompileGetFromOptimizedCodeMap);
Handle<SharedFunctionInfo> shared(function->shared(), isolate);
DisallowGarbageCollection no_gc;
Code code;
if (osr_offset.IsNone() && function->has_feedback_vector()) {
FeedbackVector feedback_vector = function->feedback_vector();
feedback_vector.EvictOptimizedCodeMarkedForDeoptimization(
function->raw_feedback_cell(), function->shared(),
"GetCodeFromOptimizedCodeCache");
code = feedback_vector.optimized_code();
} else if (!osr_offset.IsNone()) {
code = function->context()
.native_context()
.GetOSROptimizedCodeCache()
.GetOptimizedCode(shared, osr_offset, isolate);
}
DCHECK_IMPLIES(!code.is_null(), code.kind() <= code_kind);
if (!code.is_null() && code.kind() == code_kind) {
// Caching of optimized code enabled and optimized code found.
DCHECK(!code.marked_for_deoptimization());
DCHECK(function->shared().is_compiled());
DCHECK(CodeKindIsStoredInOptimizedCodeCache(code.kind()));
DCHECK_IMPLIES(!osr_offset.IsNone(), CodeKindCanOSR(code.kind()));
return Handle<Code>(code, isolate);
}
return MaybeHandle<Code>();
}
void ClearOptimizedCodeCache(OptimizedCompilationInfo* compilation_info) {
Handle<JSFunction> function = compilation_info->closure();
if (compilation_info->osr_offset().IsNone()) {
Handle<FeedbackVector> vector =
handle(function->feedback_vector(), function->GetIsolate());
vector->ClearOptimizationMarker();
}
}
void InsertCodeIntoOptimizedCodeCache(
OptimizedCompilationInfo* compilation_info) {
const CodeKind kind = compilation_info->code_kind();
if (!CodeKindIsStoredInOptimizedCodeCache(kind)) return;
if (compilation_info->function_context_specializing()) {
// Function context specialization folds-in the function context, so no
// sharing can occur. Make sure the optimized code cache is cleared.
ClearOptimizedCodeCache(compilation_info);
return;
}
// Cache optimized code.
Handle<Code> code = compilation_info->code();
Handle<JSFunction> function = compilation_info->closure();
Handle<SharedFunctionInfo> shared(function->shared(), function->GetIsolate());
Handle<NativeContext> native_context(function->context().native_context(),
function->GetIsolate());
if (compilation_info->osr_offset().IsNone()) {
Handle<FeedbackVector> vector =
handle(function->feedback_vector(), function->GetIsolate());
FeedbackVector::SetOptimizedCode(vector, code,
function->raw_feedback_cell());
} else {
DCHECK(CodeKindCanOSR(kind));
OSROptimizedCodeCache::AddOptimizedCode(native_context, shared, code,
compilation_info->osr_offset());
}
}
// Runs PrepareJob in the proper compilation & canonical scopes. Handles will be
// allocated in a persistent handle scope that is detached and handed off to the
// {compilation_info} after PrepareJob.
bool PrepareJobWithHandleScope(OptimizedCompilationJob* job, Isolate* isolate,
OptimizedCompilationInfo* compilation_info) {
CompilationHandleScope compilation(isolate, compilation_info);
CanonicalHandleScope canonical(isolate, compilation_info);
compilation_info->ReopenHandlesInNewHandleScope(isolate);
return job->PrepareJob(isolate) == CompilationJob::SUCCEEDED;
}
bool GetOptimizedCodeNow(OptimizedCompilationJob* job, Isolate* isolate,
OptimizedCompilationInfo* compilation_info) {
TimerEventScope<TimerEventRecompileSynchronous> timer(isolate);
RCS_SCOPE(isolate, RuntimeCallCounterId::kOptimizeNonConcurrent);
TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("v8.compile"),
"V8.OptimizeNonConcurrent");
if (!PrepareJobWithHandleScope(job, isolate, compilation_info)) {
CompilerTracer::TraceAbortedJob(isolate, compilation_info);
return false;
}
{
// Park main thread here to be in the same state as background threads.
ParkedScope parked_scope(isolate->main_thread_local_isolate());
if (job->ExecuteJob(isolate->counters()->runtime_call_stats(),
isolate->main_thread_local_isolate())) {
UnparkedScope unparked_scope(isolate->main_thread_local_isolate());
CompilerTracer::TraceAbortedJob(isolate, compilation_info);
return false;
}
}
if (job->FinalizeJob(isolate) != CompilationJob::SUCCEEDED) {
CompilerTracer::TraceAbortedJob(isolate, compilation_info);
return false;
}
// Success!
job->RecordCompilationStats(OptimizedCompilationJob::kSynchronous, isolate);
DCHECK(!isolate->has_pending_exception());
InsertCodeIntoOptimizedCodeCache(compilation_info);
job->RecordFunctionCompilation(CodeEventListener::LAZY_COMPILE_TAG, isolate);
return true;
}
bool GetOptimizedCodeLater(std::unique_ptr<OptimizedCompilationJob> job,
Isolate* isolate,
OptimizedCompilationInfo* compilation_info,
CodeKind code_kind, Handle<JSFunction> function) {
if (!isolate->optimizing_compile_dispatcher()->IsQueueAvailable()) {
if (FLAG_trace_concurrent_recompilation) {
PrintF(" ** Compilation queue full, will retry optimizing ");
compilation_info->closure()->ShortPrint();