blob: eb17d17793a995f20ae35c77a778ab28ac3a1b0e [file] [log] [blame]
// 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/parsing.h"
#include <memory>
#include "src/ast/ast.h"
#include "src/objects-inl.h"
#include "src/parsing/parse-info.h"
#include "src/parsing/parser.h"
#include "src/parsing/scanner-character-streams.h"
#include "src/vm-state-inl.h"
#include "src/zone/zone-list-inl.h" // crbug.com/v8/8816
namespace v8 {
namespace internal {
namespace parsing {
bool ParseProgram(ParseInfo* info, Isolate* isolate) {
DCHECK(info->is_toplevel());
DCHECK_NULL(info->literal());
VMState<PARSER> state(isolate);
// Create a character stream for the parser.
Handle<String> source(String::cast(info->script()->source()), isolate);
isolate->counters()->total_parse_size()->Increment(source->length());
std::unique_ptr<Utf16CharacterStream> stream(
ScannerStream::For(isolate, source));
info->set_character_stream(std::move(stream));
Parser parser(info);
FunctionLiteral* result = nullptr;
// Ok to use Isolate here; this function is only called in the main thread.
DCHECK(parser.parsing_on_main_thread_);
result = parser.ParseProgram(isolate, info);
info->set_literal(result);
if (result == nullptr) {
info->pending_error_handler()->ReportErrors(isolate, info->script(),
info->ast_value_factory());
} else {
info->set_language_mode(info->literal()->language_mode());
if (info->is_eval()) {
info->set_allow_eval_cache(parser.allow_eval_cache());
}
}
parser.UpdateStatistics(isolate, info->script());
return (result != nullptr);
}
bool ParseFunction(ParseInfo* info, Handle<SharedFunctionInfo> shared_info,
Isolate* isolate) {
DCHECK(!info->is_toplevel());
DCHECK(!shared_info.is_null());
DCHECK_NULL(info->literal());
// Create a character stream for the parser.
Handle<String> source(String::cast(info->script()->source()), isolate);
isolate->counters()->total_parse_size()->Increment(source->length());
std::unique_ptr<Utf16CharacterStream> stream(
ScannerStream::For(isolate, source, shared_info->StartPosition(),
shared_info->EndPosition()));
info->set_character_stream(std::move(stream));
VMState<PARSER> state(isolate);
Parser parser(info);
FunctionLiteral* result = nullptr;
// Ok to use Isolate here; this function is only called in the main thread.
DCHECK(parser.parsing_on_main_thread_);
result = parser.ParseFunction(isolate, info, shared_info);
info->set_literal(result);
if (result == nullptr) {
info->pending_error_handler()->ReportErrors(isolate, info->script(),
info->ast_value_factory());
} else {
info->ast_value_factory()->Internalize(isolate);
if (info->is_eval()) {
info->set_allow_eval_cache(parser.allow_eval_cache());
}
}
parser.UpdateStatistics(isolate, info->script());
return (result != nullptr);
}
bool ParseAny(ParseInfo* info, Handle<SharedFunctionInfo> shared_info,
Isolate* isolate) {
DCHECK(!shared_info.is_null());
return info->is_toplevel() ? ParseProgram(info, isolate)
: ParseFunction(info, shared_info, isolate);
}
} // namespace parsing
} // namespace internal
} // namespace v8