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Revert of Simplify DoParseProgram (patchset #2 id:20001 of https://codereview.chromium.org/1058363003/)

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Reason for revert:
[Sheriff] Changes some layout tests on all platforms, e.g.:
http://build.chromium.org/p/client.v8/builders/V8-Blink%20Linux%2032/builds/2543

Original issue's description:
> Simplify DoParseProgram
>
> DoParseProgram doesn't appear to need to receive toplevel scopes as
> arguments; it can properly set the end_position of the scopes to the
> scanner's position after parsing is complete.
>
> R=marja@chromium.org
> BUG=
> LOG=N
>
> Committed: https://crrev.com/8da9252f61d3c499a78b0b94299c314b2eb0b0c8
> Cr-Commit-Position: refs/heads/master@{#27847}

TBR=marja@chromium.org,wingo@igalia.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=

Review URL: https://codereview.chromium.org/1089623002

Cr-Commit-Position: refs/heads/master@{#27856}
This commit is contained in:
machenbach 2015-04-15 10:20:29 -07:00 committed by Commit bot
parent 79be74364a
commit c85b22486a
2 changed files with 34 additions and 23 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

54
src/parser.cc
View File

@ -914,6 +914,8 @@ FunctionLiteral* Parser::ParseProgram(Isolate* isolate, ParseInfo* info) {
source = String::Flatten(source);
FunctionLiteral* result;
Scope* top_scope = NULL;
Scope* eval_scope = NULL;
if (source->IsExternalTwoByteString()) {
// Notice that the stream is destroyed at the end of the branch block.
// The last line of the blocks can't be moved outside, even though they're
@ -921,11 +923,15 @@ FunctionLiteral* Parser::ParseProgram(Isolate* isolate, ParseInfo* info) {
ExternalTwoByteStringUtf16CharacterStream stream(
Handle<ExternalTwoByteString>::cast(source), 0, source->length());
scanner_.Initialize(&stream);
result = DoParseProgram(info);
result = DoParseProgram(info, &top_scope, &eval_scope);
} else {
GenericStringUtf16CharacterStream stream(source, 0, source->length());
scanner_.Initialize(&stream);
result = DoParseProgram(info);
result = DoParseProgram(info, &top_scope, &eval_scope);
}
top_scope->set_end_position(source->length());
if (eval_scope != NULL) {
eval_scope->set_end_position(source->length());
}
HandleSourceURLComments(isolate, info->script());
@ -950,7 +956,8 @@ FunctionLiteral* Parser::ParseProgram(Isolate* isolate, ParseInfo* info) {
}
FunctionLiteral* Parser::DoParseProgram(ParseInfo* info) {
FunctionLiteral* Parser::DoParseProgram(ParseInfo* info, Scope** scope,
Scope** eval_scope) {
// Note that this function can be called from the main thread or from a
// background thread. We should not access anything Isolate / heap dependent
// via ParseInfo, and also not pass it forward.
@ -959,11 +966,11 @@ FunctionLiteral* Parser::DoParseProgram(ParseInfo* info) {
FunctionLiteral* result = NULL;
{
Scope* scope = NewScope(scope_, SCRIPT_SCOPE);
info->set_script_scope(scope);
*scope = NewScope(scope_, SCRIPT_SCOPE);
info->set_script_scope(*scope);
if (!info->context().is_null() && !info->context()->IsNativeContext()) {
scope = Scope::DeserializeScopeChain(info->isolate(), zone(),
*info->context(), scope);
*scope = Scope::DeserializeScopeChain(info->isolate(), zone(),
*info->context(), *scope);
// The Scope is backed up by ScopeInfo (which is in the V8 heap); this
// means the Parser cannot operate independent of the V8 heap. Tell the
// string table to internalize strings and values right after they're
@ -971,27 +978,28 @@ FunctionLiteral* Parser::DoParseProgram(ParseInfo* info) {
DCHECK(parsing_on_main_thread_);
ast_value_factory()->Internalize(info->isolate());
}
original_scope_ = scope;
original_scope_ = *scope;
if (info->is_eval()) {
if (!scope->is_script_scope() || is_strict(info->language_mode())) {
scope = NewScope(scope, EVAL_SCOPE);
if (!(*scope)->is_script_scope() || is_strict(info->language_mode())) {
*scope = NewScope(*scope, EVAL_SCOPE);
}
} else if (info->is_module()) {
scope = NewScope(scope, MODULE_SCOPE);
*scope = NewScope(*scope, MODULE_SCOPE);
}
scope->set_start_position(0);
(*scope)->set_start_position(0);
// End position will be set by the caller.
// Compute the parsing mode.
Mode mode = (FLAG_lazy && allow_lazy()) ? PARSE_LAZILY : PARSE_EAGERLY;
if (allow_natives() || extension_ != NULL || scope->is_eval_scope()) {
if (allow_natives() || extension_ != NULL ||
(*scope)->is_eval_scope()) {
mode = PARSE_EAGERLY;
}
ParsingModeScope parsing_mode(this, mode);
// Enters 'scope'.
AstNodeFactory function_factory(ast_value_factory());
FunctionState function_state(&function_state_, &scope_, scope,
FunctionState function_state(&function_state_, &scope_, *scope,
kNormalFunction, &function_factory);
scope_->SetLanguageMode(info->language_mode());
@ -1002,14 +1010,9 @@ FunctionLiteral* Parser::DoParseProgram(ParseInfo* info) {
DCHECK(allow_harmony_modules());
ParseModuleItemList(body, &ok);
} else {
Scope* eval_scope = nullptr;
ParseStatementList(body, Token::EOS, info->is_eval(), &eval_scope, &ok);
if (eval_scope != nullptr)
eval_scope->set_end_position(scanner()->location().end_pos);
ParseStatementList(body, Token::EOS, info->is_eval(), eval_scope, &ok);
}
scope->set_end_position(scanner()->location().end_pos);
if (ok && is_strict(language_mode())) {
CheckStrictOctalLiteral(beg_pos, scanner()->location().end_pos, &ok);
CheckConflictingVarDeclarations(scope_, &ok);
@ -5521,7 +5524,14 @@ void Parser::ParseOnBackground(ParseInfo* info) {
// don't). We work around this by storing all the scopes which need their end
// position set at the end of the script (the top scope and possible eval
// scopes) and set their end position after we know the script length.
result = DoParseProgram(info);
Scope* top_scope = NULL;
Scope* eval_scope = NULL;
result = DoParseProgram(info, &top_scope, &eval_scope);
top_scope->set_end_position(scanner()->location().end_pos);
if (eval_scope != NULL) {
eval_scope->set_end_position(scanner()->location().end_pos);
}
info->set_literal(result);

3
src/parser.h
View File

@ -884,7 +884,8 @@ class Parser : public ParserBase<ParserTraits> {
Utf16CharacterStream* source);
// Called by ParseProgram after setting up the scanner.
FunctionLiteral* DoParseProgram(ParseInfo* info);
FunctionLiteral* DoParseProgram(ParseInfo* info, Scope** scope,
Scope** ad_hoc_eval_scope);
void SetCachedData(ParseInfo* info);