Server : Apache/2.4.6 (CentOS) OpenSSL/1.0.2k-fips PHP/7.4.20 System : Linux st2.domain.com 3.10.0-1127.10.1.el7.x86_64 #1 SMP Wed Jun 3 14:28:03 UTC 2020 x86_64 User : apache ( 48) PHP Version : 7.4.20 Disable Function : NONE Directory : /home/real/node-v13.0.1/deps/v8/src/parsing/ |
// Copyright 2016 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/parsing/parse-info.h"
#include "src/ast/ast-source-ranges.h"
#include "src/ast/ast-value-factory.h"
#include "src/ast/ast.h"
#include "src/base/template-utils.h"
#include "src/compiler-dispatcher/compiler-dispatcher.h"
#include "src/heap/heap-inl.h"
#include "src/logging/counters.h"
#include "src/logging/log.h"
#include "src/numbers/hash-seed-inl.h"
#include "src/objects/objects-inl.h"
#include "src/objects/scope-info.h"
#include "src/zone/zone.h"
namespace v8 {
namespace internal {
ParseInfo::ParseInfo(AccountingAllocator* zone_allocator)
: zone_(base::make_unique<Zone>(zone_allocator, ZONE_NAME)),
flags_(0),
extension_(nullptr),
script_scope_(nullptr),
stack_limit_(0),
hash_seed_(0),
function_kind_(FunctionKind::kNormalFunction),
function_syntax_kind_(FunctionSyntaxKind::kDeclaration),
script_id_(-1),
start_position_(0),
end_position_(0),
parameters_end_pos_(kNoSourcePosition),
function_literal_id_(kFunctionLiteralIdInvalid),
max_function_literal_id_(kFunctionLiteralIdInvalid),
character_stream_(nullptr),
ast_value_factory_(nullptr),
ast_string_constants_(nullptr),
function_name_(nullptr),
runtime_call_stats_(nullptr),
source_range_map_(nullptr),
literal_(nullptr) {}
ParseInfo::ParseInfo(Isolate* isolate, AccountingAllocator* zone_allocator)
: ParseInfo(zone_allocator) {
set_hash_seed(HashSeed(isolate));
set_stack_limit(isolate->stack_guard()->real_climit());
set_runtime_call_stats(isolate->counters()->runtime_call_stats());
set_logger(isolate->logger());
set_ast_string_constants(isolate->ast_string_constants());
set_collect_source_positions(!FLAG_enable_lazy_source_positions ||
isolate->NeedsDetailedOptimizedCodeLineInfo());
if (!isolate->is_best_effort_code_coverage()) set_coverage_enabled();
if (isolate->is_block_code_coverage()) set_block_coverage_enabled();
if (isolate->is_collecting_type_profile()) set_collect_type_profile();
if (isolate->compiler_dispatcher()->IsEnabled()) {
parallel_tasks_.reset(new ParallelTasks(isolate->compiler_dispatcher()));
}
set_might_always_opt(FLAG_always_opt || FLAG_prepare_always_opt);
set_allow_lazy_compile(FLAG_lazy);
set_allow_natives_syntax(FLAG_allow_natives_syntax);
set_allow_harmony_dynamic_import(FLAG_harmony_dynamic_import);
set_allow_harmony_import_meta(FLAG_harmony_import_meta);
set_allow_harmony_optional_chaining(FLAG_harmony_optional_chaining);
set_allow_harmony_nullish(FLAG_harmony_nullish);
set_allow_harmony_private_methods(FLAG_harmony_private_methods);
}
ParseInfo::ParseInfo(Isolate* isolate)
: ParseInfo(isolate, isolate->allocator()) {
script_id_ = isolate->heap()->NextScriptId();
LOG(isolate, ScriptEvent(Logger::ScriptEventType::kReserveId, script_id_));
}
template <typename T>
void ParseInfo::SetFunctionInfo(T function) {
set_language_mode(function->language_mode());
set_function_kind(function->kind());
set_function_syntax_kind(function->syntax_kind());
set_requires_instance_members_initializer(
function->requires_instance_members_initializer());
set_toplevel(function->is_toplevel());
set_is_oneshot_iife(function->is_oneshot_iife());
}
ParseInfo::ParseInfo(Isolate* isolate, Handle<SharedFunctionInfo> shared)
: ParseInfo(isolate, isolate->allocator()) {
// Do not support re-parsing top-level function of a wrapped script.
// TODO(yangguo): consider whether we need a top-level function in a
// wrapped script at all.
DCHECK_IMPLIES(is_toplevel(), !Script::cast(shared->script()).is_wrapped());
set_allow_lazy_parsing(true);
set_asm_wasm_broken(shared->is_asm_wasm_broken());
set_start_position(shared->StartPosition());
set_end_position(shared->EndPosition());
function_literal_id_ = shared->function_literal_id();
SetFunctionInfo(shared);
Handle<Script> script(Script::cast(shared->script()), isolate);
set_script(script);
if (shared->HasOuterScopeInfo()) {
set_outer_scope_info(handle(shared->GetOuterScopeInfo(), isolate));
}
// CollectTypeProfile uses its own feedback slots. If we have existing
// FeedbackMetadata, we can only collect type profile if the feedback vector
// has the appropriate slots.
set_collect_type_profile(
isolate->is_collecting_type_profile() &&
(shared->HasFeedbackMetadata()
? shared->feedback_metadata().HasTypeProfileSlot()
: script->IsUserJavaScript()));
}
ParseInfo::ParseInfo(Isolate* isolate, Handle<Script> script)
: ParseInfo(isolate, isolate->allocator()) {
SetScriptForToplevelCompile(isolate, script);
set_collect_type_profile(isolate->is_collecting_type_profile() &&
script->IsUserJavaScript());
}
// static
std::unique_ptr<ParseInfo> ParseInfo::FromParent(
const ParseInfo* outer_parse_info, AccountingAllocator* zone_allocator,
const FunctionLiteral* literal, const AstRawString* function_name) {
std::unique_ptr<ParseInfo> result =
base::make_unique<ParseInfo>(zone_allocator);
// Replicate shared state of the outer_parse_info.
result->flags_ = outer_parse_info->flags_;
result->script_id_ = outer_parse_info->script_id_;
result->set_logger(outer_parse_info->logger());
result->set_ast_string_constants(outer_parse_info->ast_string_constants());
result->set_hash_seed(outer_parse_info->hash_seed());
DCHECK_EQ(outer_parse_info->parameters_end_pos(), kNoSourcePosition);
DCHECK_NULL(outer_parse_info->extension());
DCHECK(outer_parse_info->maybe_outer_scope_info().is_null());
// Clone the function_name AstRawString into the ParseInfo's own
// AstValueFactory.
const AstRawString* cloned_function_name =
result->GetOrCreateAstValueFactory()->CloneFromOtherFactory(
function_name);
// Setup function specific details.
DCHECK(!literal->is_toplevel());
result->set_function_name(cloned_function_name);
result->set_start_position(literal->start_position());
result->set_end_position(literal->end_position());
result->set_function_literal_id(literal->function_literal_id());
result->SetFunctionInfo(literal);
return result;
}
ParseInfo::~ParseInfo() = default;
DeclarationScope* ParseInfo::scope() const { return literal()->scope(); }
Handle<Script> ParseInfo::CreateScript(Isolate* isolate, Handle<String> source,
ScriptOriginOptions origin_options,
NativesFlag natives) {
// Create a script object describing the script to be compiled.
Handle<Script> script;
if (script_id_ == -1) {
script = isolate->factory()->NewScript(source);
} else {
script = isolate->factory()->NewScriptWithId(source, script_id_);
}
if (isolate->NeedsSourcePositionsForProfiling()) {
Script::InitLineEnds(script);
}
switch (natives) {
case EXTENSION_CODE:
script->set_type(Script::TYPE_EXTENSION);
break;
case INSPECTOR_CODE:
script->set_type(Script::TYPE_INSPECTOR);
break;
case NOT_NATIVES_CODE:
break;
}
script->set_origin_options(origin_options);
SetScriptForToplevelCompile(isolate, script);
return script;
}
AstValueFactory* ParseInfo::GetOrCreateAstValueFactory() {
if (!ast_value_factory_.get()) {
ast_value_factory_.reset(
new AstValueFactory(zone(), ast_string_constants(), hash_seed()));
}
return ast_value_factory();
}
void ParseInfo::AllocateSourceRangeMap() {
DCHECK(block_coverage_enabled());
set_source_range_map(new (zone()) SourceRangeMap(zone()));
}
void ParseInfo::ResetCharacterStream() { character_stream_.reset(); }
void ParseInfo::set_character_stream(
std::unique_ptr<Utf16CharacterStream> character_stream) {
DCHECK_NULL(character_stream_);
character_stream_.swap(character_stream);
}
void ParseInfo::SetScriptForToplevelCompile(Isolate* isolate,
Handle<Script> script) {
set_script(script);
set_allow_lazy_parsing();
set_toplevel();
set_collect_type_profile(isolate->is_collecting_type_profile() &&
script->IsUserJavaScript());
if (script->is_wrapped()) {
set_function_syntax_kind(FunctionSyntaxKind::kWrapped);
}
}
void ParseInfo::set_script(Handle<Script> script) {
script_ = script;
DCHECK(script_id_ == -1 || script_id_ == script->id());
script_id_ = script->id();
set_eval(script->compilation_type() == Script::COMPILATION_TYPE_EVAL);
set_module(script->origin_options().IsModule());
DCHECK(!(is_eval() && is_module()));
if (block_coverage_enabled() && script->IsUserJavaScript()) {
AllocateSourceRangeMap();
}
}
void ParseInfo::ParallelTasks::Enqueue(ParseInfo* outer_parse_info,
const AstRawString* function_name,
FunctionLiteral* literal) {
base::Optional<CompilerDispatcher::JobId> job_id =
dispatcher_->Enqueue(outer_parse_info, function_name, literal);
if (job_id) {
enqueued_jobs_.emplace_front(std::make_pair(literal, *job_id));
}
}
} // namespace internal
} // namespace v8