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[debug] use flag to decide whether interceptor has side effect

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Adds a flag onto InterceptorInfo to mark an interceptor's getter,
query, and enumerator callbacks as side-effect-free.

Bug: v8:7515
Cq-Include-Trybots: luci.chromium.try:linux_chromium_rel_ng
Change-Id: Iafc5d2fa554d6d9a38604e179ea5b884c3b77af0
Reviewed-on: https://chromium-review.googlesource.com/957870
Commit-Queue: Erik Luo <luoe@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#51969}
This commit is contained in:
Erik Luo 2018-03-15 09:56:17 -07:00 committed by Commit Bot
parent 3669ff293e
commit 3813cbf210
6 changed files with 96 additions and 44 deletions
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80
src/api-arguments-inl.h
View File

@ -13,9 +13,9 @@
namespace v8 {
namespace internal {
#define FOR_EACH_CALLBACK(F) \
F(Query, query, Object, v8::Integer) \
F(Deleter, deleter, Object, v8::Boolean)
#define FOR_EACH_CALLBACK(F) \
F(Query, query, Object, v8::Integer, interceptor) \
F(Deleter, deleter, Object, v8::Boolean, Handle<Object>())
#define DCHECK_NAME_COMPATIBLE(interceptor, name) \
DCHECK(interceptor->is_named()); \
@ -32,44 +32,44 @@ namespace internal {
ExternalCallbackScope call_scope(ISOLATE, FUNCTION_ADDR(F)); \
PropertyCallbackInfo<API_RETURN_TYPE> callback_info(begin());
#define CREATE_NAMED_CALLBACK(Function, type, ReturnType, ApiReturnType) \
Handle<ReturnType> PropertyCallbackArguments::CallNamed##Function( \
#define CREATE_NAMED_CALLBACK(FUNCTION, TYPE, RETURN_TYPE, API_RETURN_TYPE, \
INFO_FOR_SIDE_EFFECT) \
Handle<RETURN_TYPE> PropertyCallbackArguments::CallNamed##FUNCTION( \
Handle<InterceptorInfo> interceptor, Handle<Name> name) { \
DCHECK_NAME_COMPATIBLE(interceptor, name); \
Isolate* isolate = this->isolate(); \
RuntimeCallTimerScope timer( \
isolate, RuntimeCallCounterId::kNamed##Function##Callback); \
GenericNamedProperty##Function##Callback f = \
ToCData<GenericNamedProperty##Function##Callback>( \
interceptor->type()); \
Handle<Object> side_effect_check_not_supported; \
PREPARE_CALLBACK_INFO(isolate, f, Handle<ReturnType>, ApiReturnType, \
side_effect_check_not_supported); \
isolate, RuntimeCallCounterId::kNamed##FUNCTION##Callback); \
GenericNamedProperty##FUNCTION##Callback f = \
ToCData<GenericNamedProperty##FUNCTION##Callback>( \
interceptor->TYPE()); \
PREPARE_CALLBACK_INFO(isolate, f, Handle<RETURN_TYPE>, API_RETURN_TYPE, \
INFO_FOR_SIDE_EFFECT); \
LOG(isolate, \
ApiNamedPropertyAccess("interceptor-named-" #type, holder(), *name)); \
ApiNamedPropertyAccess("interceptor-named-" #TYPE, holder(), *name)); \
f(v8::Utils::ToLocal(name), callback_info); \
return GetReturnValue<ReturnType>(isolate); \
return GetReturnValue<RETURN_TYPE>(isolate); \
}
FOR_EACH_CALLBACK(CREATE_NAMED_CALLBACK)
#undef CREATE_NAMED_CALLBACK
#define CREATE_INDEXED_CALLBACK(Function, type, ReturnType, ApiReturnType) \
Handle<ReturnType> PropertyCallbackArguments::CallIndexed##Function( \
Handle<InterceptorInfo> interceptor, uint32_t index) { \
DCHECK(!interceptor->is_named()); \
Isolate* isolate = this->isolate(); \
RuntimeCallTimerScope timer( \
isolate, RuntimeCallCounterId::kIndexed##Function##Callback); \
IndexedProperty##Function##Callback f = \
ToCData<IndexedProperty##Function##Callback>(interceptor->type()); \
Handle<Object> side_effect_check_not_supported; \
PREPARE_CALLBACK_INFO(isolate, f, Handle<ReturnType>, ApiReturnType, \
side_effect_check_not_supported); \
LOG(isolate, ApiIndexedPropertyAccess("interceptor-indexed-" #type, \
holder(), index)); \
f(index, callback_info); \
return GetReturnValue<ReturnType>(isolate); \
#define CREATE_INDEXED_CALLBACK(FUNCTION, TYPE, RETURN_TYPE, API_RETURN_TYPE, \
INFO_FOR_SIDE_EFFECT) \
Handle<RETURN_TYPE> PropertyCallbackArguments::CallIndexed##FUNCTION( \
Handle<InterceptorInfo> interceptor, uint32_t index) { \
DCHECK(!interceptor->is_named()); \
Isolate* isolate = this->isolate(); \
RuntimeCallTimerScope timer( \
isolate, RuntimeCallCounterId::kIndexed##FUNCTION##Callback); \
IndexedProperty##FUNCTION##Callback f = \
ToCData<IndexedProperty##FUNCTION##Callback>(interceptor->TYPE()); \
PREPARE_CALLBACK_INFO(isolate, f, Handle<RETURN_TYPE>, API_RETURN_TYPE, \
INFO_FOR_SIDE_EFFECT); \
LOG(isolate, ApiIndexedPropertyAccess("interceptor-indexed-" #TYPE, \
holder(), index)); \
f(index, callback_info); \
return GetReturnValue<RETURN_TYPE>(isolate); \
}
FOR_EACH_CALLBACK(CREATE_INDEXED_CALLBACK)
@ -87,8 +87,7 @@ Handle<Object> PropertyCallbackArguments::CallNamedGetter(
ApiNamedPropertyAccess("interceptor-named-getter", holder(), *name));
GenericNamedPropertyGetterCallback f =
ToCData<GenericNamedPropertyGetterCallback>(interceptor->getter());
Handle<Object> side_effect_check_not_supported;
return BasicCallNamedGetterCallback(f, name, side_effect_check_not_supported);
return BasicCallNamedGetterCallback(f, name, interceptor);
}
Handle<Object> PropertyCallbackArguments::CallNamedDescriptor(
@ -102,8 +101,7 @@ Handle<Object> PropertyCallbackArguments::CallNamedDescriptor(
GenericNamedPropertyDescriptorCallback f =
ToCData<GenericNamedPropertyDescriptorCallback>(
interceptor->descriptor());
Handle<Object> side_effect_check_not_supported;
return BasicCallNamedGetterCallback(f, name, side_effect_check_not_supported);
return BasicCallNamedGetterCallback(f, name, interceptor);
}
Handle<Object> PropertyCallbackArguments::BasicCallNamedGetterCallback(
@ -204,7 +202,7 @@ Handle<Object> PropertyCallbackArguments::CallIndexedGetter(
ApiIndexedPropertyAccess("interceptor-indexed-getter", holder(), index));
IndexedPropertyGetterCallback f =
ToCData<IndexedPropertyGetterCallback>(interceptor->getter());
return BasicCallIndexedGetterCallback(f, index);
return BasicCallIndexedGetterCallback(f, index, interceptor);
}
Handle<Object> PropertyCallbackArguments::CallIndexedDescriptor(
@ -217,15 +215,13 @@ Handle<Object> PropertyCallbackArguments::CallIndexedDescriptor(
holder(), index));
IndexedPropertyDescriptorCallback f =
ToCData<IndexedPropertyDescriptorCallback>(interceptor->descriptor());
return BasicCallIndexedGetterCallback(f, index);
return BasicCallIndexedGetterCallback(f, index, interceptor);
}
Handle<Object> PropertyCallbackArguments::BasicCallIndexedGetterCallback(
IndexedPropertyGetterCallback f, uint32_t index) {
IndexedPropertyGetterCallback f, uint32_t index, Handle<Object> info) {
Isolate* isolate = this->isolate();
Handle<Object> side_effect_check_not_supported;
PREPARE_CALLBACK_INFO(isolate, f, Handle<Object>, v8::Value,
side_effect_check_not_supported);
PREPARE_CALLBACK_INFO(isolate, f, Handle<Object>, v8::Value, info);
f(index, callback_info);
return GetReturnValue<Object>(isolate);
}
@ -237,9 +233,7 @@ Handle<JSObject> PropertyCallbackArguments::CallPropertyEnumerator(
v8::ToCData<IndexedPropertyEnumeratorCallback>(interceptor->enumerator());
// TODO(cbruni): assert same type for indexed and named callback.
Isolate* isolate = this->isolate();
Handle<Object> side_effect_check_not_supported;
PREPARE_CALLBACK_INFO(isolate, f, Handle<JSObject>, v8::Array,
side_effect_check_not_supported);
PREPARE_CALLBACK_INFO(isolate, f, Handle<JSObject>, v8::Array, interceptor);
f(callback_info);
return GetReturnValue<JSObject>(isolate);
}

2
src/api-arguments.h
View File

@ -158,7 +158,7 @@ class PropertyCallbackArguments
Handle<InterceptorInfo> interceptor);
inline Handle<Object> BasicCallIndexedGetterCallback(
IndexedPropertyGetterCallback f, uint32_t index);
IndexedPropertyGetterCallback f, uint32_t index, Handle<Object> info);
inline Handle<Object> BasicCallNamedGetterCallback(
GenericNamedPropertyGetterCallback f, Handle<Name> name,
Handle<Object> info);

6
src/debug/debug-evaluate.cc
View File

@ -937,6 +937,12 @@ bool DebugEvaluate::CallbackHasNoSideEffect(Object* callback_info) {
info->name()->ShortPrint();
PrintF("' may cause side effect.\n");
}
} else if (callback_info->IsInterceptorInfo()) {
InterceptorInfo* info = InterceptorInfo::cast(callback_info);
if (info->has_no_side_effect()) return true;
if (FLAG_trace_side_effect_free_debug_evaluate) {
PrintF("[debug-evaluate] API Interceptor may cause side effect.\n");
}
}
return false;
}

1
src/objects-inl.h
View File

@ -2401,6 +2401,7 @@ BOOL_ACCESSORS(InterceptorInfo, flags, can_intercept_symbols,
BOOL_ACCESSORS(InterceptorInfo, flags, all_can_read, kAllCanReadBit)
BOOL_ACCESSORS(InterceptorInfo, flags, non_masking, kNonMasking)
BOOL_ACCESSORS(InterceptorInfo, flags, is_named, kNamed)
BOOL_ACCESSORS(InterceptorInfo, flags, has_no_side_effect, kHasNoSideEffect)
ACCESSORS(CallHandlerInfo, callback, Object, kCallbackOffset)
ACCESSORS(CallHandlerInfo, js_callback, Object, kJsCallbackOffset)

2
src/objects.h
View File

@ -4557,6 +4557,7 @@ class InterceptorInfo: public Struct {
DECL_BOOLEAN_ACCESSORS(all_can_read)
DECL_BOOLEAN_ACCESSORS(non_masking)
DECL_BOOLEAN_ACCESSORS(is_named)
DECL_BOOLEAN_ACCESSORS(has_no_side_effect)
inline int flags() const;
inline void set_flags(int flags);
@ -4582,6 +4583,7 @@ class InterceptorInfo: public Struct {
static const int kAllCanReadBit = 1;
static const int kNonMasking = 2;
static const int kNamed = 3;
static const int kHasNoSideEffect = 4;
private:
DISALLOW_IMPLICIT_CONSTRUCTORS(InterceptorInfo);

49
test/cctest/test-api-interceptors.cc
View File

@ -64,6 +64,14 @@ void EmptyInterceptorGetter(Local<Name> name,
void EmptyInterceptorSetter(Local<Name> name, Local<Value> value,
const v8::PropertyCallbackInfo<v8::Value>& info) {}
void EmptyInterceptorQuery(Local<Name> name,
const v8::PropertyCallbackInfo<v8::Integer>& info) {}
void EmptyInterceptorDeleter(
Local<Name> name, const v8::PropertyCallbackInfo<v8::Boolean>& info) {}
void EmptyInterceptorEnumerator(
const v8::PropertyCallbackInfo<v8::Array>& info) {}
void SimpleAccessorGetter(Local<String> name,
const v8::PropertyCallbackInfo<v8::Value>& info) {
@ -2587,6 +2595,47 @@ static void InterceptorForHiddenProperties(
interceptor_for_hidden_properties_called = true;
}
THREADED_TEST(NoSideEffectPropertyHandler) {
v8::Isolate* isolate = CcTest::isolate();
v8::HandleScope scope(isolate);
Local<ObjectTemplate> templ = ObjectTemplate::New(isolate);
templ->SetHandler(v8::NamedPropertyHandlerConfiguration(
EmptyInterceptorGetter, EmptyInterceptorSetter, EmptyInterceptorQuery,
EmptyInterceptorDeleter, EmptyInterceptorEnumerator));
LocalContext context;
v8::Local<v8::Object> object =
templ->NewInstance(context.local()).ToLocalChecked();
context->Global()->Set(context.local(), v8_str("obj"), object).FromJust();
CHECK(v8::debug::EvaluateGlobal(isolate, v8_str("obj.x"), true).IsEmpty());
CHECK(
v8::debug::EvaluateGlobal(isolate, v8_str("obj.x = 1"), true).IsEmpty());
CHECK(
v8::debug::EvaluateGlobal(isolate, v8_str("'x' in obj"), true).IsEmpty());
CHECK(v8::debug::EvaluateGlobal(isolate, v8_str("delete obj.x"), true)
.IsEmpty());
// Wrap the variable declaration since declaring globals is a side effect.
CHECK(v8::debug::EvaluateGlobal(
isolate, v8_str("(function() { for (var p in obj) ; })()"), true)
.IsEmpty());
// TODO(luoe): turn on has_no_side_effect flag from API once it is exposed.
i::Handle<i::JSObject> internal_object =
i::Handle<i::JSObject>::cast(v8::Utils::OpenHandle(*object));
internal_object->GetNamedInterceptor()->set_has_no_side_effect(true);
v8::debug::EvaluateGlobal(isolate, v8_str("obj.x"), true).ToLocalChecked();
CHECK(
v8::debug::EvaluateGlobal(isolate, v8_str("obj.x = 1"), true).IsEmpty());
v8::debug::EvaluateGlobal(isolate, v8_str("'x' in obj"), true)
.ToLocalChecked();
CHECK(v8::debug::EvaluateGlobal(isolate, v8_str("delete obj.x"), true)
.IsEmpty());
v8::debug::EvaluateGlobal(
isolate, v8_str("(function() { for (var p in obj) ; })()"), true)
.ToLocalChecked();
}
THREADED_TEST(HiddenPropertiesWithInterceptors) {
LocalContext context;