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// 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/api.h"
#include "src/ast/ast-value-factory.h"
#include "src/ast/ast.h"
#include "src/heap/heap-inl.h"
#include "src/objects-inl.h"
#include "src/objects/scope-info.h"
#include "src/zone/zone.h"
namespace v8 {
namespace internal {
ParseInfo::ParseInfo(AccountingAllocator* zone_allocator)
: zone_(std::make_shared<Zone>(zone_allocator, ZONE_NAME)),
flags_(0),
source_stream_(nullptr),
source_stream_encoding_(ScriptCompiler::StreamedSource::ONE_BYTE),
character_stream_(nullptr),
extension_(nullptr),
compile_options_(ScriptCompiler::kNoCompileOptions),
script_scope_(nullptr),
asm_function_scope_(nullptr),
unicode_cache_(nullptr),
stack_limit_(0),
hash_seed_(0),
compiler_hints_(0),
start_position_(0),
end_position_(0),
parameters_end_pos_(kNoSourcePosition),
function_literal_id_(FunctionLiteral::kIdTypeInvalid),
max_function_literal_id_(FunctionLiteral::kIdTypeInvalid),
isolate_(nullptr),
cached_data_(nullptr),
ast_value_factory_(nullptr),
function_name_(nullptr),
literal_(nullptr),
deferred_handles_(nullptr) {}
ParseInfo::ParseInfo(Handle<SharedFunctionInfo> shared)
: ParseInfo(shared->GetIsolate()->allocator()) {
isolate_ = shared->GetIsolate();
set_toplevel(shared->is_toplevel());
set_allow_lazy_parsing(FLAG_lazy_inner_functions);
set_hash_seed(isolate_->heap()->HashSeed());
set_is_named_expression(shared->is_named_expression());
set_calls_eval(shared->scope_info()->CallsEval());
set_compiler_hints(shared->compiler_hints());
set_start_position(shared->start_position());
set_end_position(shared->end_position());
function_literal_id_ = shared->function_literal_id();
set_stack_limit(isolate_->stack_guard()->real_climit());
set_unicode_cache(isolate_->unicode_cache());
set_language_mode(shared->language_mode());
set_shared_info(shared);
set_module(shared->kind() == FunctionKind::kModule);
Handle<Script> script(Script::cast(shared->script()));
set_script(script);
set_native(script->type() == Script::TYPE_NATIVE);
set_eval(script->compilation_type() == Script::COMPILATION_TYPE_EVAL);
Handle<HeapObject> scope_info(shared->outer_scope_info());
if (!scope_info->IsTheHole(isolate()) &&
Handle<ScopeInfo>::cast(scope_info)->length() > 0) {
set_outer_scope_info(Handle<ScopeInfo>::cast(scope_info));
}
}
ParseInfo::ParseInfo(Handle<SharedFunctionInfo> shared,
std::shared_ptr<Zone> zone)
: ParseInfo(shared) {
zone_.swap(zone);
}
ParseInfo::ParseInfo(Handle<Script> script)
: ParseInfo(script->GetIsolate()->allocator()) {
isolate_ = script->GetIsolate();
set_allow_lazy_parsing();
set_toplevel();
set_hash_seed(isolate_->heap()->HashSeed());
set_stack_limit(isolate_->stack_guard()->real_climit());
set_unicode_cache(isolate_->unicode_cache());
set_script(script);
set_native(script->type() == Script::TYPE_NATIVE);
set_eval(script->compilation_type() == Script::COMPILATION_TYPE_EVAL);
}
ParseInfo::~ParseInfo() {
if (ast_value_factory_owned()) {
delete ast_value_factory_;
set_ast_value_factory_owned(false);
}
ast_value_factory_ = nullptr;
}
// static
ParseInfo* ParseInfo::AllocateWithoutScript(Handle<SharedFunctionInfo> shared) {
Isolate* isolate = shared->GetIsolate();
ParseInfo* p = new ParseInfo(isolate->allocator());
p->isolate_ = isolate;
p->set_toplevel(shared->is_toplevel());
p->set_allow_lazy_parsing(FLAG_lazy_inner_functions);
p->set_hash_seed(isolate->heap()->HashSeed());
p->set_is_named_expression(shared->is_named_expression());
p->set_calls_eval(shared->scope_info()->CallsEval());
p->set_compiler_hints(shared->compiler_hints());
p->set_start_position(shared->start_position());
p->set_end_position(shared->end_position());
p->function_literal_id_ = shared->function_literal_id();
p->set_stack_limit(isolate->stack_guard()->real_climit());
p->set_unicode_cache(isolate->unicode_cache());
p->set_language_mode(shared->language_mode());
p->set_shared_info(shared);
p->set_module(shared->kind() == FunctionKind::kModule);
// BUG(5946): This function exists as a workaround until we can
// get rid of %SetCode in our native functions. The ParseInfo
// is explicitly set up for the case that:
// a) you have a native built-in,
// b) it's being run for the 2nd-Nth time in an isolate,
// c) we've already compiled bytecode and therefore don't need
// to parse.
// We tolerate a ParseInfo without a Script in this case.
p->set_native(true);
p->set_eval(false);
Handle<HeapObject> scope_info(shared->outer_scope_info());
if (!scope_info->IsTheHole(isolate) &&
Handle<ScopeInfo>::cast(scope_info)->length() > 0) {
p->set_outer_scope_info(Handle<ScopeInfo>::cast(scope_info));
}
return p;
}
DeclarationScope* ParseInfo::scope() const { return literal()->scope(); }
bool ParseInfo::is_declaration() const {
return (compiler_hints_ & (1 << SharedFunctionInfo::kIsDeclaration)) != 0;
}
FunctionKind ParseInfo::function_kind() const {
return SharedFunctionInfo::FunctionKindBits::decode(compiler_hints_);
}
void ParseInfo::set_deferred_handles(
std::shared_ptr<DeferredHandles> deferred_handles) {
DCHECK(deferred_handles_.get() == nullptr);
deferred_handles_.swap(deferred_handles);
}
void ParseInfo::set_deferred_handles(DeferredHandles* deferred_handles) {
DCHECK(deferred_handles_.get() == nullptr);
deferred_handles_.reset(deferred_handles);
}
#ifdef DEBUG
bool ParseInfo::script_is_native() const {
return script_->type() == Script::TYPE_NATIVE;
}
#endif // DEBUG
} // namespace internal
} // namespace v8