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Revert "Revert "Fix a bug in scope analysis.""

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Reapply r8838 with a fix for the issue of function names.

Because function names can be added/changed/removed through the API,
remember whether the function is anonymous when initially parsed and use
that information when compiling.

R=vegorov@chromium.org
BUG=1583
TEST=regress-1583

Review URL: http://codereview.chromium.org/7491097

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@8858 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
This commit is contained in:
kmillikin@chromium.org 2011-08-08 16:14:46 +00:00
parent 8e62a1c72c
commit d941053dbe
10 changed files with 161 additions and 101 deletions
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1
src/compiler.cc
View File

@ -736,6 +736,7 @@ void Compiler::SetFunctionInfo(Handle<SharedFunctionInfo> function_info,
function_info->set_start_position(lit->start_position());
function_info->set_end_position(lit->end_position());
function_info->set_is_expression(lit->is_expression());
function_info->set_is_anonymous(lit->name()->length() == 0);
function_info->set_is_toplevel(is_toplevel);
function_info->set_inferred_name(*lit->inferred_name());
function_info->SetThisPropertyAssignmentsInfo(

37
src/heap.cc
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@ -2399,40 +2399,41 @@ MaybeObject* Heap::AllocateForeign(Address address, PretenureFlag pretenure) {
MaybeObject* Heap::AllocateSharedFunctionInfo(Object* name) {
Object* result;
{ MaybeObject* maybe_result =
Allocate(shared_function_info_map(), OLD_POINTER_SPACE);
if (!maybe_result->ToObject(&result)) return maybe_result;
}
SharedFunctionInfo* share;
MaybeObject* maybe = Allocate(shared_function_info_map(), OLD_POINTER_SPACE);
if (!maybe->To<SharedFunctionInfo>(&share)) return maybe;
SharedFunctionInfo* share = SharedFunctionInfo::cast(result);
// Set pointer fields.
share->set_name(name);
Code* illegal = isolate_->builtins()->builtin(Builtins::kIllegal);
share->set_code(illegal);
share->set_scope_info(SerializedScopeInfo::Empty());
Code* construct_stub = isolate_->builtins()->builtin(
Builtins::kJSConstructStubGeneric);
Code* construct_stub =
isolate_->builtins()->builtin(Builtins::kJSConstructStubGeneric);
share->set_construct_stub(construct_stub);
share->set_expected_nof_properties(0);
share->set_length(0);
share->set_formal_parameter_count(0);
share->set_instance_class_name(Object_symbol());
share->set_function_data(undefined_value());
share->set_script(undefined_value());
share->set_start_position_and_type(0);
share->set_debug_info(undefined_value());
share->set_inferred_name(empty_string());
share->set_compiler_hints(0);
share->set_deopt_counter(Smi::FromInt(FLAG_deopt_every_n_times));
share->set_initial_map(undefined_value());
share->set_this_property_assignments_count(0);
share->set_this_property_assignments(undefined_value());
share->set_opt_count(0);
share->set_deopt_counter(Smi::FromInt(FLAG_deopt_every_n_times));
// Set integer fields (smi or int, depending on the architecture).
share->set_length(0);
share->set_formal_parameter_count(0);
share->set_expected_nof_properties(0);
share->set_num_literals(0);
share->set_start_position_and_type(0);
share->set_end_position(0);
share->set_function_token_position(0);
share->set_native(false);
return result;
// All compiler hints default to false or 0.
share->set_compiler_hints(0);
share->set_this_property_assignments_count(0);
share->set_opt_count(0);
return share;
}

35
src/objects-inl.h
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@ -3534,35 +3534,14 @@ void SharedFunctionInfo::set_optimization_disabled(bool disable) {
}
BOOL_ACCESSORS(SharedFunctionInfo,
compiler_hints,
strict_mode,
BOOL_ACCESSORS(SharedFunctionInfo, compiler_hints, strict_mode,
kStrictModeFunction)
bool SharedFunctionInfo::native() {
return BooleanBit::get(compiler_hints(), kNative);
}
void SharedFunctionInfo::set_native(bool value) {
set_compiler_hints(BooleanBit::set(compiler_hints(),
kNative,
value));
}
bool SharedFunctionInfo::bound() {
return BooleanBit::get(compiler_hints(), kBoundFunction);
}
void SharedFunctionInfo::set_bound(bool value) {
set_compiler_hints(BooleanBit::set(compiler_hints(),
kBoundFunction,
value));
}
BOOL_ACCESSORS(SharedFunctionInfo, compiler_hints, native, kNative)
BOOL_ACCESSORS(SharedFunctionInfo, compiler_hints,
name_should_print_as_anonymous,
kNameShouldPrintAsAnonymous)
BOOL_ACCESSORS(SharedFunctionInfo, compiler_hints, bound, kBoundFunction)
BOOL_ACCESSORS(SharedFunctionInfo, compiler_hints, is_anonymous, kIsAnonymous)
ACCESSORS(CodeCache, default_cache, FixedArray, kDefaultCacheOffset)
ACCESSORS(CodeCache, normal_type_cache, Object, kNormalTypeCacheOffset)

32
src/objects.h
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@ -4666,12 +4666,10 @@ class SharedFunctionInfo: public HeapObject {
inline void set_end_position(int end_position);
// Is this function a function expression in the source code.
inline bool is_expression();
inline void set_is_expression(bool value);
DECL_BOOLEAN_ACCESSORS(is_expression)
// Is this function a top-level function (scripts, evals).
inline bool is_toplevel();
inline void set_is_toplevel(bool value);
DECL_BOOLEAN_ACCESSORS(is_toplevel)
// Bit field containing various information collected by the compiler to
// drive optimization.
@ -4727,13 +4725,21 @@ class SharedFunctionInfo: public HeapObject {
// These needs special threatment in .call and .apply since
// null passed as the receiver should not be translated to the
// global object.
inline bool native();
inline void set_native(bool value);
DECL_BOOLEAN_ACCESSORS(native)
// Indicates that the function was created by the Function function.
// Though it's anonymous, toString should treat it as if it had the name
// "anonymous". We don't set the name itself so that the system does not
// see a binding for it.
DECL_BOOLEAN_ACCESSORS(name_should_print_as_anonymous)
// Indicates whether the function is a bound function created using
// the bind function.
inline bool bound();
inline void set_bound(bool value);
DECL_BOOLEAN_ACCESSORS(bound)
// Indicates that the function is anonymous (the name field can be set
// through the API, which does not change this flag).
DECL_BOOLEAN_ACCESSORS(is_anonymous)
// Indicates whether or not the code in the shared function support
// deoptimization.
@ -4915,7 +4921,6 @@ class SharedFunctionInfo: public HeapObject {
// Bit positions in compiler_hints.
static const int kCodeAgeSize = 3;
static const int kCodeAgeMask = (1 << kCodeAgeSize) - 1;
static const int kBoundFunction = 9;
enum CompilerHints {
kHasOnlySimpleThisPropertyAssignments,
@ -4926,7 +4931,11 @@ class SharedFunctionInfo: public HeapObject {
kStrictModeFunction,
kUsesArguments,
kHasDuplicateParameters,
kNative
kNative,
kBoundFunction,
kIsAnonymous,
kNameShouldPrintAsAnonymous,
kCompilerHintsCount // Pseudo entry
};
private:
@ -4940,6 +4949,9 @@ class SharedFunctionInfo: public HeapObject {
static const int kCompilerHintsSize = kIntSize;
#endif
STATIC_ASSERT(SharedFunctionInfo::kCompilerHintsCount <=
SharedFunctionInfo::kCompilerHintsSize * kBitsPerByte);
public:
// Constants for optimizing codegen for strict mode function and
// native tests.

54
src/parser.cc
View File

@ -731,10 +731,14 @@ FunctionLiteral* Parser::ParseLazy(CompilationInfo* info,
FunctionLiteralType type =
shared_info->is_expression() ? EXPRESSION : DECLARATION;
Handle<String> function_name =
shared_info->is_anonymous() ? Handle<String>::null() : name;
bool ok = true;
result = ParseFunctionLiteral(name,
false, // Strict mode name already checked.
RelocInfo::kNoPosition, type, &ok);
result = ParseFunctionLiteral(function_name,
false, // Strict mode name already checked.
RelocInfo::kNoPosition,
type,
&ok);
// Make sure the results agree.
ASSERT(ok == (result != NULL));
}
@ -2842,8 +2846,11 @@ Expression* Parser::ParseMemberWithNewPrefixesExpression(PositionStack* stack,
name = ParseIdentifierOrStrictReservedWord(&is_strict_reserved_name,
CHECK_OK);
}
result = ParseFunctionLiteral(name, is_strict_reserved_name,
function_token_position, NESTED, CHECK_OK);
result = ParseFunctionLiteral(name,
is_strict_reserved_name,
function_token_position,
EXPRESSION,
CHECK_OK);
} else {
result = ParsePrimaryExpression(CHECK_OK);
}
@ -3412,7 +3419,7 @@ ObjectLiteral::Property* Parser::ParseObjectLiteralGetSet(bool is_getter,
ParseFunctionLiteral(name,
false, // reserved words are allowed here
RelocInfo::kNoPosition,
DECLARATION,
EXPRESSION,
CHECK_OK);
// Allow any number of parameters for compatiabilty with JSC.
// Specification only allows zero parameters for get and one for set.
@ -3619,25 +3626,22 @@ ZoneList<Expression*>* Parser::ParseArguments(bool* ok) {
}
FunctionLiteral* Parser::ParseFunctionLiteral(Handle<String> var_name,
FunctionLiteral* Parser::ParseFunctionLiteral(Handle<String> function_name,
bool name_is_strict_reserved,
int function_token_position,
FunctionLiteralType type,
bool* ok) {
// Function ::
// '(' FormalParameterList? ')' '{' FunctionBody '}'
bool is_named = !var_name.is_null();
// The name associated with this function. If it's a function expression,
// this is the actual function name, otherwise this is the name of the
// variable declared and initialized with the function (expression). In
// that case, we don't have a function name (it's empty).
Handle<String> name =
is_named ? var_name : isolate()->factory()->empty_symbol();
// The function name, if any.
Handle<String> function_name = isolate()->factory()->empty_symbol();
if (is_named && (type == EXPRESSION || type == NESTED)) {
function_name = name;
// Anonymous functions were passed either the empty symbol or a null
// handle as the function name. Remember if we were passed a non-empty
// handle to decide whether to invoke function name inference.
bool should_infer_name = function_name.is_null();
// We want a non-null handle as the function name.
if (should_infer_name) {
function_name = isolate()->factory()->empty_symbol();
}
int num_parameters = 0;
@ -3655,7 +3659,7 @@ FunctionLiteral* Parser::ParseFunctionLiteral(Handle<String> var_name,
bool has_duplicate_parameters = false;
// Parse function body.
{ LexicalScope lexical_scope(this, scope, isolate());
top_scope_->SetScopeName(name);
top_scope_->SetScopeName(function_name);
// FormalParameterList ::
// '(' (Identifier)*[','] ')'
@ -3705,7 +3709,7 @@ FunctionLiteral* Parser::ParseFunctionLiteral(Handle<String> var_name,
// NOTE: We create a proxy and resolve it here so that in the
// future we can change the AST to only refer to VariableProxies
// instead of Variables and Proxis as is the case now.
if (!function_name.is_null() && function_name->length() > 0) {
if (type == EXPRESSION && function_name->length() > 0) {
Variable* fvar = top_scope_->DeclareFunctionVar(function_name);
VariableProxy* fproxy =
top_scope_->NewUnresolved(function_name, inside_with());
@ -3739,7 +3743,7 @@ FunctionLiteral* Parser::ParseFunctionLiteral(Handle<String> var_name,
end_pos = entry.end_pos();
if (end_pos <= function_block_pos) {
// End position greater than end of stream is safe, and hard to check.
ReportInvalidPreparseData(name, CHECK_OK);
ReportInvalidPreparseData(function_name, CHECK_OK);
}
isolate()->counters()->total_preparse_skipped()->Increment(
end_pos - function_block_pos);
@ -3769,7 +3773,7 @@ FunctionLiteral* Parser::ParseFunctionLiteral(Handle<String> var_name,
// Validate strict mode.
if (top_scope_->is_strict_mode()) {
if (IsEvalOrArguments(name)) {
if (IsEvalOrArguments(function_name)) {
int position = function_token_position != RelocInfo::kNoPosition
? function_token_position
: (start_pos > 0 ? start_pos - 1 : start_pos);
@ -3813,7 +3817,7 @@ FunctionLiteral* Parser::ParseFunctionLiteral(Handle<String> var_name,
FunctionLiteral* function_literal =
new(zone()) FunctionLiteral(isolate(),
name,
function_name,
scope,
body,
materialized_literal_count,
@ -3823,11 +3827,11 @@ FunctionLiteral* Parser::ParseFunctionLiteral(Handle<String> var_name,
num_parameters,
start_pos,
end_pos,
(function_name->length() > 0),
type == EXPRESSION,
has_duplicate_parameters);
function_literal->set_function_token_position(function_token_position);
if (fni_ != NULL && !is_named) fni_->AddFunction(function_literal);
if (fni_ != NULL && should_infer_name) fni_->AddFunction(function_literal);
return function_literal;
}

3
src/parser.h
View File

@ -554,8 +554,7 @@ class Parser {
enum FunctionLiteralType {
EXPRESSION,
DECLARATION,
NESTED
DECLARATION
};
ZoneList<Expression*>* ParseArguments(bool* ok);

40
src/runtime.cc
View File

@ -615,8 +615,7 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_CreateJSProxy) {
RUNTIME_FUNCTION(MaybeObject*, Runtime_IsJSProxy) {
ASSERT(args.length() == 1);
Object* obj = args[0];
return obj->IsJSProxy()
? isolate->heap()->true_value() : isolate->heap()->false_value();
return isolate->heap()->ToBoolean(obj->IsJSProxy());
}
@ -1038,8 +1037,7 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_IsExtensible) {
ASSERT(proto->IsJSGlobalObject());
obj = JSObject::cast(proto);
}
return obj->map()->is_extensible() ? isolate->heap()->true_value()
: isolate->heap()->false_value();
return isolate->heap()->ToBoolean(obj->map()->is_extensible());
}
@ -1105,8 +1103,7 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_DisableAccessChecks) {
Map::cast(new_map)->set_is_access_check_needed(false);
object->set_map(Map::cast(new_map));
}
return needs_access_checks ? isolate->heap()->true_value()
: isolate->heap()->false_value();
return isolate->heap()->ToBoolean(needs_access_checks);
}
@ -1917,6 +1914,24 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_FunctionSetName) {
}
RUNTIME_FUNCTION(MaybeObject*, Runtime_FunctionNameShouldPrintAsAnonymous) {
NoHandleAllocation ha;
ASSERT(args.length() == 1);
CONVERT_CHECKED(JSFunction, f, args[0]);
return isolate->heap()->ToBoolean(
f->shared()->name_should_print_as_anonymous());
}
RUNTIME_FUNCTION(MaybeObject*, Runtime_FunctionMarkNameShouldPrintAsAnonymous) {
NoHandleAllocation ha;
ASSERT(args.length() == 1);
CONVERT_CHECKED(JSFunction, f, args[0]);
f->shared()->set_name_should_print_as_anonymous(true);
return isolate->heap()->undefined_value();
}
RUNTIME_FUNCTION(MaybeObject*, Runtime_FunctionSetBound) {
HandleScope scope(isolate);
ASSERT(args.length() == 1);
@ -2097,8 +2112,7 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_FunctionIsAPIFunction) {
ASSERT(args.length() == 1);
CONVERT_CHECKED(JSFunction, f, args[0]);
return f->shared()->IsApiFunction() ? isolate->heap()->true_value()
: isolate->heap()->false_value();
return isolate->heap()->ToBoolean(f->shared()->IsApiFunction());
}
@ -2107,8 +2121,7 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_FunctionIsBuiltin) {
ASSERT(args.length() == 1);
CONVERT_CHECKED(JSFunction, f, args[0]);
return f->IsBuiltin() ? isolate->heap()->true_value() :
isolate->heap()->false_value();
return isolate->heap()->ToBoolean(f->IsBuiltin());
}
@ -9980,9 +9993,7 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_DebugGetPropertyDetails) {
details->set(0, *value);
details->set(1, property_details);
if (hasJavaScriptAccessors) {
details->set(2,
caught_exception ? isolate->heap()->true_value()
: isolate->heap()->false_value());
details->set(2, isolate->heap()->ToBoolean(caught_exception));
details->set(3, FixedArray::cast(*result_callback_obj)->get(0));
details->set(4, FixedArray::cast(*result_callback_obj)->get(1));
}
@ -12169,8 +12180,7 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_DeleteLOL) {
#ifdef LIVE_OBJECT_LIST
CONVERT_SMI_ARG_CHECKED(id, 0);
bool success = LiveObjectList::Delete(id);
return success ? isolate->heap()->true_value() :
isolate->heap()->false_value();
return isolate->heap()->ToBoolean(success);
#else
return isolate->heap()->undefined_value();
#endif

2
src/runtime.h
View File

@ -214,6 +214,8 @@ namespace internal {
F(FunctionSetReadOnlyPrototype, 1, 1) \
F(FunctionGetName, 1, 1) \
F(FunctionSetName, 2, 1) \
F(FunctionNameShouldPrintAsAnonymous, 1, 1) \
F(FunctionMarkNameShouldPrintAsAnonymous, 1, 1) \
F(FunctionSetBound, 1, 1) \
F(FunctionRemovePrototype, 1, 1) \
F(FunctionGetSourceCode, 1, 1) \

8
src/v8natives.js
View File

@ -1,4 +1,4 @@
// Copyright 2006-2008 the V8 project authors. All rights reserved.
// Copyright 2011 the V8 project authors. All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
@ -1428,7 +1428,9 @@ function FunctionSourceString(func) {
}
}
var name = %FunctionGetName(func);
var name = %FunctionNameShouldPrintAsAnonymous(func)
? 'anonymous'
: %FunctionGetName(func);
return 'function ' + name + source;
}
@ -1523,7 +1525,7 @@ function NewFunction(arg1) { // length == 1
// The call to SetNewFunctionAttributes will ensure the prototype
// property of the resulting function is enumerable (ECMA262, 15.3.5.2).
var f = %CompileString(source)();
%FunctionSetName(f, "anonymous");
%FunctionMarkNameShouldPrintAsAnonymous(f);
return %SetNewFunctionAttributes(f);
}

50
test/mjsunit/regress/regress-1583.js Normal file
View File

@ -0,0 +1,50 @@
// Copyright 2011 the V8 project authors. All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following
// disclaimer in the documentation and/or other materials provided
// with the distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// Flags: --allow-natives-syntax
// Regression test for a bug in recompilation of anonymous functions inside
// catch. We would incorrectly hoist them outside the catch in some cases.
function f() {
try {
throw 0;
} catch (e) {
try {
var x = { a: 'hest' };
x.m = function (e) { return x.a; };
} catch (e) {
}
}
return x;
}
var o = f();
assertEquals('hest', o.m());
assertEquals('hest', o.m());
assertEquals('hest', o.m());
%OptimizeFunctionOnNextCall(o.m);
assertEquals('hest', o.m());