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Revert of Use in-object fields instead of private symbols for regexp slots. (patchset #4 id:60001 of https://codereview.chromium.org/1428203003/ )

Browse Source 
Reason for revert:
browser_tests failure with --gtest_filter=ExternallyConnectableMessagingTest.EnablingAndDisabling

Original issue's description:
> Use in-object fields instead of private symbols for regexp slots.
>
> R=bmeurer@chromium.org
>
> Committed: https://crrev.com/5a1e42c039ac3379ebe1e7e34fb8163e1ec1493e
> Cr-Commit-Position: refs/heads/master@{#31791}
>
> Committed: https://crrev.com/bf5c9af92ac0a5b7f020ac968d3d42ed06aa6144
> Cr-Commit-Position: refs/heads/master@{#31805}

TBR=bmeurer@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Review URL: https://codereview.chromium.org/1432453005

Cr-Commit-Position: refs/heads/master@{#31817}
This commit is contained in:
yangguo 2015-11-05 01:07:27 -08:00 committed by Commit bot
parent 096125deaa
commit d9511fa9df
11 changed files with 70 additions and 81 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

33
src/bootstrapper.cc
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@ -1223,15 +1223,32 @@ void Genesis::InitializeGlobal(Handle<JSGlobalObject> global_object,
DCHECK_EQ(0, initial_map->GetInObjectProperties());
Map::EnsureDescriptorSlack(initial_map, 1);
PropertyAttributes final =
static_cast<PropertyAttributes>(DONT_ENUM | DONT_DELETE | READ_ONLY);
Map::EnsureDescriptorSlack(initial_map, 5);
// ECMA-262, section 15.10.7.5.
PropertyAttributes writable =
static_cast<PropertyAttributes>(DONT_ENUM | DONT_DELETE);
DataDescriptor field(factory->last_index_string(),
JSRegExp::kLastIndexFieldIndex, writable,
Representation::Tagged());
initial_map->AppendDescriptor(&field);
{
// ES6 21.2.3.2.1
DataDescriptor field(factory->regexp_source_symbol(),
JSRegExp::kSourceFieldIndex, final,
Representation::Tagged());
initial_map->AppendDescriptor(&field);
}
{
DataDescriptor field(factory->regexp_flags_symbol(),
JSRegExp::kFlagsFieldIndex, final,
Representation::Smi());
initial_map->AppendDescriptor(&field);
}
{
// ECMA-262, section 15.10.7.5.
PropertyAttributes writable =
static_cast<PropertyAttributes>(DONT_ENUM | DONT_DELETE);
DataDescriptor field(factory->last_index_string(),
JSRegExp::kLastIndexFieldIndex, writable,
Representation::Tagged());
initial_map->AppendDescriptor(&field);
}
static const int num_fields = JSRegExp::kInObjectFieldCount;
initial_map->SetInObjectProperties(num_fields);

8
src/crankshaft/hydrogen-instructions.h
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@ -6195,14 +6195,6 @@ class HObjectAccess final {
return HObjectAccess(kInobject, JSGlobalObject::kNativeContextOffset);
}
static HObjectAccess ForJSRegExpFlags() {
return HObjectAccess(kInobject, JSRegExp::kFlagsOffset);
}
static HObjectAccess ForJSRegExpSource() {
return HObjectAccess(kInobject, JSRegExp::kSourceOffset);
}
static HObjectAccess ForJSCollectionTable() {
return HObjectAccess::ForObservableJSObjectOffset(
JSCollection::kTableOffset);

20
src/crankshaft/hydrogen.cc
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@ -12644,26 +12644,6 @@ void HOptimizedGraphBuilder::GenerateRegExpExec(CallRuntime* call) {
}
void HOptimizedGraphBuilder::GenerateRegExpFlags(CallRuntime* call) {
DCHECK_EQ(1, call->arguments()->length());
CHECK_ALIVE(VisitExpressions(call->arguments()));
HValue* regexp = Pop();
HInstruction* result =
New<HLoadNamedField>(regexp, nullptr, HObjectAccess::ForJSRegExpFlags());
return ast_context()->ReturnInstruction(result, call->id());
}
void HOptimizedGraphBuilder::GenerateRegExpSource(CallRuntime* call) {
DCHECK_EQ(1, call->arguments()->length());
CHECK_ALIVE(VisitExpressions(call->arguments()));
HValue* regexp = Pop();
HInstruction* result =
New<HLoadNamedField>(regexp, nullptr, HObjectAccess::ForJSRegExpSource());
return ast_context()->ReturnInstruction(result, call->id());
}
void HOptimizedGraphBuilder::GenerateDoubleLo(CallRuntime* call) {
DCHECK_EQ(1, call->arguments()->length());
CHECK_ALIVE(VisitForValue(call->arguments()->at(0)));

2
src/crankshaft/hydrogen.h
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@ -2235,8 +2235,6 @@ class HOptimizedGraphBuilder : public HGraphBuilder, public AstVisitor {
F(SubString) \
F(RegExpExec) \
F(RegExpConstructResult) \
F(RegExpFlags) \
F(RegExpSource) \
F(NumberToString) \
F(DebugIsActive) \
F(Likely) \

12
src/js/macros.py
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@ -188,12 +188,12 @@ define REGEXP_MULTILINE_MASK = 4;
define REGEXP_STICKY_MASK = 8;
define REGEXP_UNICODE_MASK = 16;
macro REGEXP_GLOBAL(regexp) = (%_RegExpFlags(regexp) & REGEXP_GLOBAL_MASK);
macro REGEXP_IGNORE_CASE(regexp) = (%_RegExpFlags(regexp) & REGEXP_IGNORE_CASE_MASK);
macro REGEXP_MULTILINE(regexp) = (%_RegExpFlags(regexp) & REGEXP_MULTILINE_MASK);
macro REGEXP_STICKY(regexp) = (%_RegExpFlags(regexp) & REGEXP_STICKY_MASK);
macro REGEXP_UNICODE(regexp) = (%_RegExpFlags(regexp) & REGEXP_UNICODE_MASK);
macro REGEXP_SOURCE(regexp) = (%_RegExpSource(regexp));
macro REGEXP_GLOBAL(regexp) = (regexp[regExpFlagsSymbol] & REGEXP_GLOBAL_MASK);
macro REGEXP_IGNORE_CASE(regexp) = (regexp[regExpFlagsSymbol] & REGEXP_IGNORE_CASE_MASK);
macro REGEXP_MULTILINE(regexp) = (regexp[regExpFlagsSymbol] & REGEXP_MULTILINE_MASK);
macro REGEXP_STICKY(regexp) = (regexp[regExpFlagsSymbol] & REGEXP_STICKY_MASK);
macro REGEXP_UNICODE(regexp) = (regexp[regExpFlagsSymbol] & REGEXP_UNICODE_MASK);
macro REGEXP_SOURCE(regexp) = (regexp[regExpSourceSymbol]);
# We can't put macros in macros so we use constants here.
# REGEXP_NUMBER_OF_CAPTURES

18
src/js/regexp.js
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@ -14,6 +14,8 @@ var GlobalObject = global.Object;
var GlobalRegExp = global.RegExp;
var InternalPackedArray = utils.InternalPackedArray;
var MakeTypeError;
var regExpFlagsSymbol = utils.ImportNow("regexp_flags_symbol");
var regExpSourceSymbol = utils.ImportNow("regexp_source_symbol");
utils.ImportFromExperimental(function(from) {
FLAG_harmony_tolength = from.FLAG_harmony_tolength;
@ -332,10 +334,14 @@ function RegExpMakeCaptureGetter(n) {
// ES6 21.2.5.4, 21.2.5.5, 21.2.5.7, 21.2.5.12, 21.2.5.15.
function GetRegExpFlagGetter(name, mask) {
var getter = function() {
if (!IS_REGEXP(this)) {
if (!IS_SPEC_OBJECT(this)) {
throw MakeTypeError(kRegExpNonObject, name, TO_STRING(this));
}
return !!(%_RegExpFlags(this) & mask);
var flags = this[regExpFlagsSymbol];
if (IS_UNDEFINED(flags)) {
throw MakeTypeError(kRegExpNonRegExp, TO_STRING(this));
}
return !!(flags & mask);
};
%FunctionSetName(getter, name);
%SetNativeFlag(getter);
@ -345,11 +351,15 @@ function GetRegExpFlagGetter(name, mask) {
// ES6 21.2.5.10.
function RegExpGetSource() {
if (!IS_REGEXP(this)) {
if (!IS_SPEC_OBJECT(this)) {
throw MakeTypeError(kRegExpNonObject, "RegExp.prototype.source",
TO_STRING(this));
}
return %_RegExpSource(this);
var source = this[regExpSourceSymbol];
if (IS_UNDEFINED(source)) {
throw MakeTypeError(kRegExpNonRegExp, TO_STRING(this));
}
return source;
}
%SetNativeFlag(RegExpGetSource);

1
src/js/string.js
View File

@ -19,6 +19,7 @@ var MakeRangeError;
var MakeTypeError;
var RegExpExec;
var RegExpExecNoTests;
var regExpFlagsSymbol = utils.ImportNow("regexp_flags_symbol");
var RegExpLastMatchInfo;
utils.Import(function(from) {

2
src/objects-inl.h
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@ -6772,8 +6772,6 @@ ACCESSORS(JSTypedArray, raw_length, Object, kLengthOffset)
ACCESSORS(JSRegExp, data, Object, kDataOffset)
ACCESSORS(JSRegExp, flags, Object, kFlagsOffset)
ACCESSORS(JSRegExp, source, Object, kSourceOffset)
JSRegExp::Type JSRegExp::TypeTag() {

12
src/objects.h
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@ -7699,8 +7699,6 @@ class JSRegExp: public JSObject {
};
DECL_ACCESSORS(data, Object)
DECL_ACCESSORS(flags, Object)
DECL_ACCESSORS(source, Object)
inline Type TypeTag();
inline int CaptureCount();
@ -7733,9 +7731,7 @@ class JSRegExp: public JSObject {
DECLARE_VERIFIER(JSRegExp)
static const int kDataOffset = JSObject::kHeaderSize;
static const int kSourceOffset = kDataOffset + kPointerSize;
static const int kFlagsOffset = kSourceOffset + kPointerSize;
static const int kSize = kFlagsOffset + kPointerSize;
static const int kSize = kDataOffset + kPointerSize;
// Indices in the data array.
static const int kTagIndex = 0;
@ -7784,8 +7780,10 @@ class JSRegExp: public JSObject {
FixedArray::kHeaderSize + kIrregexpCaptureCountIndex * kPointerSize;
// In-object fields.
static const int kLastIndexFieldIndex = 0;
static const int kInObjectFieldCount = 1;
static const int kSourceFieldIndex = 0;
static const int kFlagsFieldIndex = 1;
static const int kLastIndexFieldIndex = 2;
static const int kInObjectFieldCount = 3;
// The uninitialized value for a regexp code object.
static const int kUninitializedValue = -1;

41
src/runtime/runtime-regexp.cc
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@ -788,22 +788,6 @@ RUNTIME_FUNCTION(Runtime_RegExpExec) {
}
RUNTIME_FUNCTION(Runtime_RegExpFlags) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_CHECKED(JSRegExp, regexp, 0);
return regexp->flags();
}
RUNTIME_FUNCTION(Runtime_RegExpSource) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_CHECKED(JSRegExp, regexp, 0);
return regexp->source();
}
RUNTIME_FUNCTION(Runtime_RegExpConstructResult) {
HandleScope handle_scope(isolate);
DCHECK(args.length() == 3);
@ -940,24 +924,37 @@ RUNTIME_FUNCTION(Runtime_RegExpInitializeAndCompile) {
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, escaped_source,
EscapeRegExpSource(isolate, source));
regexp->set_source(*escaped_source);
regexp->set_flags(Smi::FromInt(flags.value()));
Map* map = regexp->map();
Object* constructor = map->GetConstructor();
if (constructor->IsJSFunction() &&
JSFunction::cast(constructor)->initial_map() == map) {
// If we still have the original map, set in-object properties directly.
regexp->InObjectPropertyAtPut(JSRegExp::kSourceFieldIndex, *escaped_source);
regexp->InObjectPropertyAtPut(JSRegExp::kFlagsFieldIndex,
Smi::FromInt(flags.value()),
SKIP_WRITE_BARRIER);
regexp->InObjectPropertyAtPut(JSRegExp::kLastIndexFieldIndex,
Smi::FromInt(0), SKIP_WRITE_BARRIER);
} else {
// Map has changed, so use generic, but slower, method.
// Map has changed, so use generic, but slower, method. We also end here if
// the --harmony-regexp flag is set, because the initial map does not have
// space for the 'sticky' flag, since it is from the snapshot, but must work
// both with and without --harmony-regexp. When sticky comes out from under
// the flag, we will be able to use the fast initial map.
PropertyAttributes final =
static_cast<PropertyAttributes>(READ_ONLY | DONT_ENUM | DONT_DELETE);
PropertyAttributes writable =
static_cast<PropertyAttributes>(DONT_ENUM | DONT_DELETE);
Handle<Object> zero(Smi::FromInt(0), isolate);
JSObject::SetOwnPropertyIgnoreAttributes(
regexp, factory->last_index_string(),
Handle<Smi>(Smi::FromInt(0), isolate), writable)
regexp, factory->regexp_source_symbol(), escaped_source, final)
.Check();
JSObject::SetOwnPropertyIgnoreAttributes(
regexp, factory->regexp_flags_symbol(),
Handle<Smi>(Smi::FromInt(flags.value()), isolate), final)
.Check();
JSObject::SetOwnPropertyIgnoreAttributes(
regexp, factory->last_index_string(), zero, writable).Check();
}
Handle<Object> result;

2
src/runtime/runtime.h
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@ -559,8 +559,6 @@ namespace internal {
F(StringReplaceGlobalRegExpWithString, 4, 1) \
F(StringSplit, 3, 1) \
F(RegExpExec, 4, 1) \
F(RegExpFlags, 1, 1) \
F(RegExpSource, 1, 1) \
F(RegExpConstructResult, 3, 1) \
F(RegExpInitializeAndCompile, 3, 1) \
F(MaterializeRegExpLiteral, 4, 1) \