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v8/test/cctest/test-api-interceptors.cc
jkummerow 9fe4efe5b8 Revert of [api] Add interceptor for defineProperty(). (patchset #9 id:160001 of https://codereview.chromium.org/2272383002/ ) 
Reason for revert:
Breaks cctest/test-api-interceptors/QueryInterceptor on the waterfall

Original issue's description:
> [api] Add interceptor for defineProperty().
>
> With the Indexed/GenericNamedPropertyDefinerCallback it is possible to intercept Object.defineProperty() calls.
>
> Requests that call JSReceiver::OrdinaryDefineOwnProperty() internally, also trigger the interceptor. This includes Object.freeze(), Object.preventExtensions(), and Object.seal().
>
> BUG=
>
> Committed: https://crrev.com/b9d985975cf3bab0ded0cec9fafd3799f9bde29a
> Cr-Commit-Position: refs/heads/master@{#39094}

TBR=jochen@chromium.org,franzih@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=

Review-Url: https://codereview.chromium.org/2303533004
Cr-Commit-Position: refs/heads/master@{#39095}
2016-09-01 16:04:00 +00:00

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// Copyright 2015 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 <stdlib.h>
#include "test/cctest/test-api.h"
#include "include/v8-util.h"
#include "src/api.h"
#include "src/arguments.h"
#include "src/base/platform/platform.h"
#include "src/compilation-cache.h"
#include "src/execution.h"
#include "src/objects.h"
#include "src/parsing/parser.h"
#include "src/unicode-inl.h"
#include "src/utils.h"
using ::v8::Boolean;
using ::v8::BooleanObject;
using ::v8::Context;
using ::v8::Extension;
using ::v8::Function;
using ::v8::FunctionTemplate;
using ::v8::HandleScope;
using ::v8::Local;
using ::v8::Name;
using ::v8::Message;
using ::v8::MessageCallback;
using ::v8::Object;
using ::v8::ObjectTemplate;
using ::v8::Persistent;
using ::v8::Script;
using ::v8::StackTrace;
using ::v8::String;
using ::v8::Symbol;
using ::v8::TryCatch;
using ::v8::Undefined;
using ::v8::UniqueId;
using ::v8::V8;
using ::v8::Value;
namespace {
void Returns42(const v8::FunctionCallbackInfo<v8::Value>& info) {
info.GetReturnValue().Set(42);
}
void Return239Callback(Local<String> name,
const v8::PropertyCallbackInfo<Value>& info) {
ApiTestFuzzer::Fuzz();
CheckReturnValue(info, FUNCTION_ADDR(Return239Callback));
info.GetReturnValue().Set(v8_str("bad value"));
info.GetReturnValue().Set(v8_num(239));
}
void EmptyInterceptorGetter(Local<Name> name,
const v8::PropertyCallbackInfo<v8::Value>& info) {}
void EmptyInterceptorSetter(Local<Name> name, Local<Value> value,
const v8::PropertyCallbackInfo<v8::Value>& info) {}
void SimpleAccessorGetter(Local<String> name,
const v8::PropertyCallbackInfo<v8::Value>& info) {
Local<Object> self = Local<Object>::Cast(info.This());
info.GetReturnValue().Set(self->Get(info.GetIsolate()->GetCurrentContext(),
String::Concat(v8_str("accessor_"), name))
.ToLocalChecked());
}
void SimpleAccessorSetter(Local<String> name, Local<Value> value,
const v8::PropertyCallbackInfo<void>& info) {
Local<Object> self = Local<Object>::Cast(info.This());
self->Set(info.GetIsolate()->GetCurrentContext(),
String::Concat(v8_str("accessor_"), name), value)
.FromJust();
}
void SymbolAccessorGetter(Local<Name> name,
const v8::PropertyCallbackInfo<v8::Value>& info) {
CHECK(name->IsSymbol());
Local<Symbol> sym = Local<Symbol>::Cast(name);
if (sym->Name()->IsUndefined()) return;
SimpleAccessorGetter(Local<String>::Cast(sym->Name()), info);
}
void SymbolAccessorSetter(Local<Name> name, Local<Value> value,
const v8::PropertyCallbackInfo<void>& info) {
CHECK(name->IsSymbol());
Local<Symbol> sym = Local<Symbol>::Cast(name);
if (sym->Name()->IsUndefined()) return;
SimpleAccessorSetter(Local<String>::Cast(sym->Name()), value, info);
}
void StringInterceptorGetter(
Local<String> name,
const v8::PropertyCallbackInfo<v8::Value>&
info) { // Intercept names that start with 'interceptor_'.
String::Utf8Value utf8(name);
char* name_str = *utf8;
char prefix[] = "interceptor_";
int i;
for (i = 0; name_str[i] && prefix[i]; ++i) {
if (name_str[i] != prefix[i]) return;
}
Local<Object> self = Local<Object>::Cast(info.This());
info.GetReturnValue().Set(
self->GetPrivate(
info.GetIsolate()->GetCurrentContext(),
v8::Private::ForApi(info.GetIsolate(), v8_str(name_str + i)))
.ToLocalChecked());
}
void StringInterceptorSetter(Local<String> name, Local<Value> value,
const v8::PropertyCallbackInfo<v8::Value>& info) {
// Intercept accesses that set certain integer values, for which the name does
// not start with 'accessor_'.
String::Utf8Value utf8(name);
char* name_str = *utf8;
char prefix[] = "accessor_";
int i;
for (i = 0; name_str[i] && prefix[i]; ++i) {
if (name_str[i] != prefix[i]) break;
}
if (!prefix[i]) return;
Local<Context> context = info.GetIsolate()->GetCurrentContext();
if (value->IsInt32() && value->Int32Value(context).FromJust() < 10000) {
Local<Object> self = Local<Object>::Cast(info.This());
Local<v8::Private> symbol = v8::Private::ForApi(info.GetIsolate(), name);
self->SetPrivate(context, symbol, value).FromJust();
info.GetReturnValue().Set(value);
}
}
void InterceptorGetter(Local<Name> generic_name,
const v8::PropertyCallbackInfo<v8::Value>& info) {
if (generic_name->IsSymbol()) return;
StringInterceptorGetter(Local<String>::Cast(generic_name), info);
}
void InterceptorSetter(Local<Name> generic_name, Local<Value> value,
const v8::PropertyCallbackInfo<v8::Value>& info) {
if (generic_name->IsSymbol()) return;
StringInterceptorSetter(Local<String>::Cast(generic_name), value, info);
}
void GenericInterceptorGetter(Local<Name> generic_name,
const v8::PropertyCallbackInfo<v8::Value>& info) {
Local<String> str;
if (generic_name->IsSymbol()) {
Local<Value> name = Local<Symbol>::Cast(generic_name)->Name();
if (name->IsUndefined()) return;
str = String::Concat(v8_str("_sym_"), Local<String>::Cast(name));
} else {
Local<String> name = Local<String>::Cast(generic_name);
String::Utf8Value utf8(name);
char* name_str = *utf8;
if (*name_str == '_') return;
str = String::Concat(v8_str("_str_"), name);
}
Local<Object> self = Local<Object>::Cast(info.This());
info.GetReturnValue().Set(
self->Get(info.GetIsolate()->GetCurrentContext(), str).ToLocalChecked());
}
void GenericInterceptorSetter(Local<Name> generic_name, Local<Value> value,
const v8::PropertyCallbackInfo<v8::Value>& info) {
Local<String> str;
if (generic_name->IsSymbol()) {
Local<Value> name = Local<Symbol>::Cast(generic_name)->Name();
if (name->IsUndefined()) return;
str = String::Concat(v8_str("_sym_"), Local<String>::Cast(name));
} else {
Local<String> name = Local<String>::Cast(generic_name);
String::Utf8Value utf8(name);
char* name_str = *utf8;
if (*name_str == '_') return;
str = String::Concat(v8_str("_str_"), name);
}
Local<Object> self = Local<Object>::Cast(info.This());
self->Set(info.GetIsolate()->GetCurrentContext(), str, value).FromJust();
info.GetReturnValue().Set(value);
}
void AddAccessor(Local<FunctionTemplate> templ, Local<String> name,
v8::AccessorGetterCallback getter,
v8::AccessorSetterCallback setter) {
templ->PrototypeTemplate()->SetAccessor(name, getter, setter);
}
void AddInterceptor(Local<FunctionTemplate> templ,
v8::NamedPropertyGetterCallback getter,
v8::NamedPropertySetterCallback setter) {
templ->InstanceTemplate()->SetNamedPropertyHandler(getter, setter);
}
void AddAccessor(Local<FunctionTemplate> templ, Local<Name> name,
v8::AccessorNameGetterCallback getter,
v8::AccessorNameSetterCallback setter) {
templ->PrototypeTemplate()->SetAccessor(name, getter, setter);
}
void AddInterceptor(Local<FunctionTemplate> templ,
v8::GenericNamedPropertyGetterCallback getter,
v8::GenericNamedPropertySetterCallback setter) {
templ->InstanceTemplate()->SetHandler(
v8::NamedPropertyHandlerConfiguration(getter, setter));
}
v8::Local<v8::Object> bottom;
void CheckThisIndexedPropertyHandler(
uint32_t index, const v8::PropertyCallbackInfo<v8::Value>& info) {
CheckReturnValue(info, FUNCTION_ADDR(CheckThisIndexedPropertyHandler));
ApiTestFuzzer::Fuzz();
CHECK(info.This()
->Equals(info.GetIsolate()->GetCurrentContext(), bottom)
.FromJust());
}
void CheckThisNamedPropertyHandler(
Local<Name> name, const v8::PropertyCallbackInfo<v8::Value>& info) {
CheckReturnValue(info, FUNCTION_ADDR(CheckThisNamedPropertyHandler));
ApiTestFuzzer::Fuzz();
CHECK(info.This()
->Equals(info.GetIsolate()->GetCurrentContext(), bottom)
.FromJust());
}
void CheckThisIndexedPropertySetter(
uint32_t index, Local<Value> value,
const v8::PropertyCallbackInfo<v8::Value>& info) {
CheckReturnValue(info, FUNCTION_ADDR(CheckThisIndexedPropertySetter));
ApiTestFuzzer::Fuzz();
CHECK(info.This()
->Equals(info.GetIsolate()->GetCurrentContext(), bottom)
.FromJust());
}
void CheckThisNamedPropertySetter(
Local<Name> property, Local<Value> value,
const v8::PropertyCallbackInfo<v8::Value>& info) {
CheckReturnValue(info, FUNCTION_ADDR(CheckThisNamedPropertySetter));
ApiTestFuzzer::Fuzz();
CHECK(info.This()
->Equals(info.GetIsolate()->GetCurrentContext(), bottom)
.FromJust());
}
void CheckThisIndexedPropertyQuery(
uint32_t index, const v8::PropertyCallbackInfo<v8::Integer>& info) {
CheckReturnValue(info, FUNCTION_ADDR(CheckThisIndexedPropertyQuery));
ApiTestFuzzer::Fuzz();
CHECK(info.This()
->Equals(info.GetIsolate()->GetCurrentContext(), bottom)
.FromJust());
}
void CheckThisNamedPropertyQuery(
Local<Name> property, const v8::PropertyCallbackInfo<v8::Integer>& info) {
CheckReturnValue(info, FUNCTION_ADDR(CheckThisNamedPropertyQuery));
ApiTestFuzzer::Fuzz();
CHECK(info.This()
->Equals(info.GetIsolate()->GetCurrentContext(), bottom)
.FromJust());
}
void CheckThisIndexedPropertyDeleter(
uint32_t index, const v8::PropertyCallbackInfo<v8::Boolean>& info) {
CheckReturnValue(info, FUNCTION_ADDR(CheckThisIndexedPropertyDeleter));
ApiTestFuzzer::Fuzz();
CHECK(info.This()
->Equals(info.GetIsolate()->GetCurrentContext(), bottom)
.FromJust());
}
void CheckThisNamedPropertyDeleter(
Local<Name> property, const v8::PropertyCallbackInfo<v8::Boolean>& info) {
CheckReturnValue(info, FUNCTION_ADDR(CheckThisNamedPropertyDeleter));
ApiTestFuzzer::Fuzz();
CHECK(info.This()
->Equals(info.GetIsolate()->GetCurrentContext(), bottom)
.FromJust());
}
void CheckThisIndexedPropertyEnumerator(
const v8::PropertyCallbackInfo<v8::Array>& info) {
CheckReturnValue(info, FUNCTION_ADDR(CheckThisIndexedPropertyEnumerator));
ApiTestFuzzer::Fuzz();
CHECK(info.This()
->Equals(info.GetIsolate()->GetCurrentContext(), bottom)
.FromJust());
}
void CheckThisNamedPropertyEnumerator(
const v8::PropertyCallbackInfo<v8::Array>& info) {
CheckReturnValue(info, FUNCTION_ADDR(CheckThisNamedPropertyEnumerator));
ApiTestFuzzer::Fuzz();
CHECK(info.This()
->Equals(info.GetIsolate()->GetCurrentContext(), bottom)
.FromJust());
}
int echo_named_call_count;
void EchoNamedProperty(Local<Name> name,
const v8::PropertyCallbackInfo<v8::Value>& info) {
ApiTestFuzzer::Fuzz();
CHECK(v8_str("data")
->Equals(info.GetIsolate()->GetCurrentContext(), info.Data())
.FromJust());
echo_named_call_count++;
info.GetReturnValue().Set(name);
}
void InterceptorHasOwnPropertyGetter(
Local<Name> name, const v8::PropertyCallbackInfo<v8::Value>& info) {
ApiTestFuzzer::Fuzz();
}
void InterceptorHasOwnPropertyGetterGC(
Local<Name> name, const v8::PropertyCallbackInfo<v8::Value>& info) {
ApiTestFuzzer::Fuzz();
CcTest::heap()->CollectAllGarbage();
}
} // namespace
int query_counter_int = 0;
namespace {
void QueryCallback(Local<Name> property,
const v8::PropertyCallbackInfo<v8::Integer>& info) {
query_counter_int++;
}
} // namespace
// Examples that show when the query callback is triggered.
THREADED_TEST(QueryInterceptor) {
v8::HandleScope scope(CcTest::isolate());
v8::Local<v8::FunctionTemplate> templ =
v8::FunctionTemplate::New(CcTest::isolate());
templ->InstanceTemplate()->SetHandler(
v8::NamedPropertyHandlerConfiguration(0, 0, QueryCallback));
LocalContext env;
env->Global()
->Set(env.local(), v8_str("obj"), templ->GetFunction(env.local())
.ToLocalChecked()
->NewInstance(env.local())
.ToLocalChecked())
.FromJust();
CHECK_EQ(query_counter_int, 0);
v8::Local<Value> result =
v8_compile("Object.getOwnPropertyDescriptor(obj, 'x');")
->Run(env.local())
.ToLocalChecked();
CHECK_EQ(query_counter_int, 1);
CHECK_EQ(v8::PropertyAttribute::None,
static_cast<v8::PropertyAttribute>(
result->Int32Value(env.local()).FromJust()));
v8_compile("Object.defineProperty(obj, 'not_enum', {value: 17});")
->Run(env.local())
.ToLocalChecked();
CHECK_EQ(query_counter_int, 2);
v8_compile(
"Object.defineProperty(obj, 'enum', {value: 17, enumerable: true, "
"writable: true});")
->Run(env.local())
.ToLocalChecked();
CHECK_EQ(query_counter_int, 3);
CHECK(v8_compile("obj.propertyIsEnumerable('enum');")
->Run(env.local())
.ToLocalChecked()
->BooleanValue(env.local())
.FromJust());
CHECK_EQ(query_counter_int, 4);
CHECK(!v8_compile("obj.propertyIsEnumerable('not_enum');")
->Run(env.local())
.ToLocalChecked()
->BooleanValue(env.local())
.FromJust());
CHECK_EQ(query_counter_int, 5);
CHECK(v8_compile("obj.hasOwnProperty('enum');")
->Run(env.local())
.ToLocalChecked()
->BooleanValue(env.local())
.FromJust());
CHECK_EQ(query_counter_int, 5);
CHECK(v8_compile("obj.hasOwnProperty('not_enum');")
->Run(env.local())
.ToLocalChecked()
->BooleanValue(env.local())
.FromJust());
CHECK_EQ(query_counter_int, 5);
CHECK(!v8_compile("obj.hasOwnProperty('x');")
->Run(env.local())
.ToLocalChecked()
->BooleanValue(env.local())
.FromJust());
CHECK_EQ(query_counter_int, 6);
CHECK(!v8_compile("obj.propertyIsEnumerable('undef');")
->Run(env.local())
.ToLocalChecked()
->BooleanValue(env.local())
.FromJust());
CHECK_EQ(query_counter_int, 7);
v8_compile("Object.defineProperty(obj, 'enum', {value: 42});")
->Run(env.local())
.ToLocalChecked();
CHECK_EQ(query_counter_int, 8);
v8_compile("Object.isFrozen('obj.x');")->Run(env.local()).ToLocalChecked();
CHECK_EQ(query_counter_int, 8);
}
THREADED_TEST(InterceptorHasOwnProperty) {
LocalContext context;
v8::Isolate* isolate = context->GetIsolate();
v8::HandleScope scope(isolate);
Local<v8::FunctionTemplate> fun_templ = v8::FunctionTemplate::New(isolate);
Local<v8::ObjectTemplate> instance_templ = fun_templ->InstanceTemplate();
instance_templ->SetHandler(
v8::NamedPropertyHandlerConfiguration(InterceptorHasOwnPropertyGetter));
Local<Function> function =
fun_templ->GetFunction(context.local()).ToLocalChecked();
context->Global()
->Set(context.local(), v8_str("constructor"), function)
.FromJust();
v8::Local<Value> value = CompileRun(
"var o = new constructor();"
"o.hasOwnProperty('ostehaps');");
CHECK_EQ(false, value->BooleanValue(context.local()).FromJust());
value = CompileRun(
"o.ostehaps = 42;"
"o.hasOwnProperty('ostehaps');");
CHECK_EQ(true, value->BooleanValue(context.local()).FromJust());
value = CompileRun(
"var p = new constructor();"
"p.hasOwnProperty('ostehaps');");
CHECK_EQ(false, value->BooleanValue(context.local()).FromJust());
}
THREADED_TEST(InterceptorHasOwnPropertyCausingGC) {
LocalContext context;
v8::Isolate* isolate = context->GetIsolate();
v8::HandleScope scope(isolate);
Local<v8::FunctionTemplate> fun_templ = v8::FunctionTemplate::New(isolate);
Local<v8::ObjectTemplate> instance_templ = fun_templ->InstanceTemplate();
instance_templ->SetHandler(
v8::NamedPropertyHandlerConfiguration(InterceptorHasOwnPropertyGetterGC));
Local<Function> function =
fun_templ->GetFunction(context.local()).ToLocalChecked();
context->Global()
->Set(context.local(), v8_str("constructor"), function)
.FromJust();
// Let's first make some stuff so we can be sure to get a good GC.
CompileRun(
"function makestr(size) {"
" switch (size) {"
" case 1: return 'f';"
" case 2: return 'fo';"
" case 3: return 'foo';"
" }"
" return makestr(size >> 1) + makestr((size + 1) >> 1);"
"}"
"var x = makestr(12345);"
"x = makestr(31415);"
"x = makestr(23456);");
v8::Local<Value> value = CompileRun(
"var o = new constructor();"
"o.__proto__ = new String(x);"
"o.hasOwnProperty('ostehaps');");
CHECK_EQ(false, value->BooleanValue(context.local()).FromJust());
}
static void CheckInterceptorLoadIC(
v8::GenericNamedPropertyGetterCallback getter, const char* source,
int expected) {
v8::Isolate* isolate = CcTest::isolate();
v8::HandleScope scope(isolate);
v8::Local<v8::ObjectTemplate> templ = ObjectTemplate::New(isolate);
templ->SetHandler(v8::NamedPropertyHandlerConfiguration(getter, 0, 0, 0, 0,
v8_str("data")));
LocalContext context;
context->Global()
->Set(context.local(), v8_str("o"),
templ->NewInstance(context.local()).ToLocalChecked())
.FromJust();
v8::Local<Value> value = CompileRun(source);
CHECK_EQ(expected, value->Int32Value(context.local()).FromJust());
}
static void InterceptorLoadICGetter(
Local<Name> name, const v8::PropertyCallbackInfo<v8::Value>& info) {
ApiTestFuzzer::Fuzz();
v8::Isolate* isolate = CcTest::isolate();
CHECK_EQ(isolate, info.GetIsolate());
v8::Local<v8::Context> context = isolate->GetCurrentContext();
CHECK(v8_str("data")->Equals(context, info.Data()).FromJust());
CHECK(v8_str("x")->Equals(context, name).FromJust());
info.GetReturnValue().Set(v8::Integer::New(isolate, 42));
}
// This test should hit the load IC for the interceptor case.
THREADED_TEST(InterceptorLoadIC) {
CheckInterceptorLoadIC(InterceptorLoadICGetter,
"var result = 0;"
"for (var i = 0; i < 1000; i++) {"
" result = o.x;"
"}",
42);
}
// Below go several tests which verify that JITing for various
// configurations of interceptor and explicit fields works fine
// (those cases are special cased to get better performance).
static void InterceptorLoadXICGetter(
Local<Name> name, const v8::PropertyCallbackInfo<v8::Value>& info) {
ApiTestFuzzer::Fuzz();
info.GetReturnValue().Set(
v8_str("x")
->Equals(info.GetIsolate()->GetCurrentContext(), name)
.FromJust()
? v8::Local<v8::Value>(v8::Integer::New(info.GetIsolate(), 42))
: v8::Local<v8::Value>());
}
THREADED_TEST(InterceptorLoadICWithFieldOnHolder) {
CheckInterceptorLoadIC(InterceptorLoadXICGetter,
"var result = 0;"
"o.y = 239;"
"for (var i = 0; i < 1000; i++) {"
" result = o.y;"
"}",
239);
}
THREADED_TEST(InterceptorLoadICWithSubstitutedProto) {
CheckInterceptorLoadIC(InterceptorLoadXICGetter,
"var result = 0;"
"o.__proto__ = { 'y': 239 };"
"for (var i = 0; i < 1000; i++) {"
" result = o.y + o.x;"
"}",
239 + 42);
}
THREADED_TEST(InterceptorLoadICWithPropertyOnProto) {
CheckInterceptorLoadIC(InterceptorLoadXICGetter,
"var result = 0;"
"o.__proto__.y = 239;"
"for (var i = 0; i < 1000; i++) {"
" result = o.y + o.x;"
"}",
239 + 42);
}
THREADED_TEST(InterceptorLoadICUndefined) {
CheckInterceptorLoadIC(InterceptorLoadXICGetter,
"var result = 0;"
"for (var i = 0; i < 1000; i++) {"
" result = (o.y == undefined) ? 239 : 42;"
"}",
239);
}
THREADED_TEST(InterceptorLoadICWithOverride) {
CheckInterceptorLoadIC(InterceptorLoadXICGetter,
"fst = new Object(); fst.__proto__ = o;"
"snd = new Object(); snd.__proto__ = fst;"
"var result1 = 0;"
"for (var i = 0; i < 1000; i++) {"
" result1 = snd.x;"
"}"
"fst.x = 239;"
"var result = 0;"
"for (var i = 0; i < 1000; i++) {"
" result = snd.x;"
"}"
"result + result1",
239 + 42);
}
// Test the case when we stored field into
// a stub, but interceptor produced value on its own.
THREADED_TEST(InterceptorLoadICFieldNotNeeded) {
CheckInterceptorLoadIC(
InterceptorLoadXICGetter,
"proto = new Object();"
"o.__proto__ = proto;"
"proto.x = 239;"
"for (var i = 0; i < 1000; i++) {"
" o.x;"
// Now it should be ICed and keep a reference to x defined on proto
"}"
"var result = 0;"
"for (var i = 0; i < 1000; i++) {"
" result += o.x;"
"}"
"result;",
42 * 1000);
}
// Test the case when we stored field into
// a stub, but it got invalidated later on.
THREADED_TEST(InterceptorLoadICInvalidatedField) {
CheckInterceptorLoadIC(
InterceptorLoadXICGetter,
"proto1 = new Object();"
"proto2 = new Object();"
"o.__proto__ = proto1;"
"proto1.__proto__ = proto2;"
"proto2.y = 239;"
"for (var i = 0; i < 1000; i++) {"
" o.y;"
// Now it should be ICed and keep a reference to y defined on proto2
"}"
"proto1.y = 42;"
"var result = 0;"
"for (var i = 0; i < 1000; i++) {"
" result += o.y;"
"}"
"result;",
42 * 1000);
}
static int interceptor_load_not_handled_calls = 0;
static void InterceptorLoadNotHandled(
Local<Name> name, const v8::PropertyCallbackInfo<v8::Value>& info) {
++interceptor_load_not_handled_calls;
}
// Test how post-interceptor lookups are done in the non-cacheable
// case: the interceptor should not be invoked during this lookup.
THREADED_TEST(InterceptorLoadICPostInterceptor) {
interceptor_load_not_handled_calls = 0;
CheckInterceptorLoadIC(InterceptorLoadNotHandled,
"receiver = new Object();"
"receiver.__proto__ = o;"
"proto = new Object();"
"/* Make proto a slow-case object. */"
"for (var i = 0; i < 1000; i++) {"
" proto[\"xxxxxxxx\" + i] = [];"
"}"
"proto.x = 17;"
"o.__proto__ = proto;"
"var result = 0;"
"for (var i = 0; i < 1000; i++) {"
" result += receiver.x;"
"}"
"result;",
17 * 1000);
CHECK_EQ(1000, interceptor_load_not_handled_calls);
}
// Test the case when we stored field into
// a stub, but it got invalidated later on due to override on
// global object which is between interceptor and fields' holders.
THREADED_TEST(InterceptorLoadICInvalidatedFieldViaGlobal) {
CheckInterceptorLoadIC(
InterceptorLoadXICGetter,
"o.__proto__ = this;" // set a global to be a proto of o.
"this.__proto__.y = 239;"
"for (var i = 0; i < 10; i++) {"
" if (o.y != 239) throw 'oops: ' + o.y;"
// Now it should be ICed and keep a reference to y defined on
// field_holder.
"}"
"this.y = 42;" // Assign on a global.
"var result = 0;"
"for (var i = 0; i < 10; i++) {"
" result += o.y;"
"}"
"result;",
42 * 10);
}
static void SetOnThis(Local<String> name, Local<Value> value,
const v8::PropertyCallbackInfo<void>& info) {
Local<Object>::Cast(info.This())
->CreateDataProperty(info.GetIsolate()->GetCurrentContext(), name, value)
.FromJust();
}
THREADED_TEST(InterceptorLoadICWithCallbackOnHolder) {
v8::Isolate* isolate = CcTest::isolate();
v8::HandleScope scope(isolate);
v8::Local<v8::ObjectTemplate> templ = ObjectTemplate::New(isolate);
templ->SetHandler(
v8::NamedPropertyHandlerConfiguration(InterceptorLoadXICGetter));
templ->SetAccessor(v8_str("y"), Return239Callback);
LocalContext context;
context->Global()
->Set(context.local(), v8_str("o"),
templ->NewInstance(context.local()).ToLocalChecked())
.FromJust();
// Check the case when receiver and interceptor's holder
// are the same objects.
v8::Local<Value> value = CompileRun(
"var result = 0;"
"for (var i = 0; i < 7; i++) {"
" result = o.y;"
"}");
CHECK_EQ(239, value->Int32Value(context.local()).FromJust());
// Check the case when interceptor's holder is in proto chain
// of receiver.
value = CompileRun(
"r = { __proto__: o };"
"var result = 0;"
"for (var i = 0; i < 7; i++) {"
" result = r.y;"
"}");
CHECK_EQ(239, value->Int32Value(context.local()).FromJust());
}
THREADED_TEST(InterceptorLoadICWithCallbackOnProto) {
v8::Isolate* isolate = CcTest::isolate();
v8::HandleScope scope(isolate);
v8::Local<v8::ObjectTemplate> templ_o = ObjectTemplate::New(isolate);
templ_o->SetHandler(
v8::NamedPropertyHandlerConfiguration(InterceptorLoadXICGetter));
v8::Local<v8::ObjectTemplate> templ_p = ObjectTemplate::New(isolate);
templ_p->SetAccessor(v8_str("y"), Return239Callback);
LocalContext context;
context->Global()
->Set(context.local(), v8_str("o"),
templ_o->NewInstance(context.local()).ToLocalChecked())
.FromJust();
context->Global()
->Set(context.local(), v8_str("p"),
templ_p->NewInstance(context.local()).ToLocalChecked())
.FromJust();
// Check the case when receiver and interceptor's holder
// are the same objects.
v8::Local<Value> value = CompileRun(
"o.__proto__ = p;"
"var result = 0;"
"for (var i = 0; i < 7; i++) {"
" result = o.x + o.y;"
"}");
CHECK_EQ(239 + 42, value->Int32Value(context.local()).FromJust());
// Check the case when interceptor's holder is in proto chain
// of receiver.
value = CompileRun(
"r = { __proto__: o };"
"var result = 0;"
"for (var i = 0; i < 7; i++) {"
" result = r.x + r.y;"
"}");
CHECK_EQ(239 + 42, value->Int32Value(context.local()).FromJust());
}
THREADED_TEST(InterceptorLoadICForCallbackWithOverride) {
v8::Isolate* isolate = CcTest::isolate();
v8::HandleScope scope(isolate);
v8::Local<v8::ObjectTemplate> templ = ObjectTemplate::New(isolate);
templ->SetHandler(
v8::NamedPropertyHandlerConfiguration(InterceptorLoadXICGetter));
templ->SetAccessor(v8_str("y"), Return239Callback);
LocalContext context;
context->Global()
->Set(context.local(), v8_str("o"),
templ->NewInstance(context.local()).ToLocalChecked())
.FromJust();
v8::Local<Value> value = CompileRun(
"fst = new Object(); fst.__proto__ = o;"
"snd = new Object(); snd.__proto__ = fst;"
"var result1 = 0;"
"for (var i = 0; i < 7; i++) {"
" result1 = snd.x;"
"}"
"fst.x = 239;"
"var result = 0;"
"for (var i = 0; i < 7; i++) {"
" result = snd.x;"
"}"
"result + result1");
CHECK_EQ(239 + 42, value->Int32Value(context.local()).FromJust());
}
// Test the case when we stored callback into
// a stub, but interceptor produced value on its own.
THREADED_TEST(InterceptorLoadICCallbackNotNeeded) {
v8::Isolate* isolate = CcTest::isolate();
v8::HandleScope scope(isolate);
v8::Local<v8::ObjectTemplate> templ_o = ObjectTemplate::New(isolate);
templ_o->SetHandler(
v8::NamedPropertyHandlerConfiguration(InterceptorLoadXICGetter));
v8::Local<v8::ObjectTemplate> templ_p = ObjectTemplate::New(isolate);
templ_p->SetAccessor(v8_str("y"), Return239Callback);
LocalContext context;
context->Global()
->Set(context.local(), v8_str("o"),
templ_o->NewInstance(context.local()).ToLocalChecked())
.FromJust();
context->Global()
->Set(context.local(), v8_str("p"),
templ_p->NewInstance(context.local()).ToLocalChecked())
.FromJust();
v8::Local<Value> value = CompileRun(
"o.__proto__ = p;"
"for (var i = 0; i < 7; i++) {"
" o.x;"
// Now it should be ICed and keep a reference to x defined on p
"}"
"var result = 0;"
"for (var i = 0; i < 7; i++) {"
" result += o.x;"
"}"
"result");
CHECK_EQ(42 * 7, value->Int32Value(context.local()).FromJust());
}
// Test the case when we stored callback into
// a stub, but it got invalidated later on.
THREADED_TEST(InterceptorLoadICInvalidatedCallback) {
v8::Isolate* isolate = CcTest::isolate();
v8::HandleScope scope(isolate);
v8::Local<v8::ObjectTemplate> templ_o = ObjectTemplate::New(isolate);
templ_o->SetHandler(
v8::NamedPropertyHandlerConfiguration(InterceptorLoadXICGetter));
v8::Local<v8::ObjectTemplate> templ_p = ObjectTemplate::New(isolate);
templ_p->SetAccessor(v8_str("y"), Return239Callback, SetOnThis);
LocalContext context;
context->Global()
->Set(context.local(), v8_str("o"),
templ_o->NewInstance(context.local()).ToLocalChecked())
.FromJust();
context->Global()
->Set(context.local(), v8_str("p"),
templ_p->NewInstance(context.local()).ToLocalChecked())
.FromJust();
v8::Local<Value> value = CompileRun(
"inbetween = new Object();"
"o.__proto__ = inbetween;"
"inbetween.__proto__ = p;"
"for (var i = 0; i < 10; i++) {"
" o.y;"
// Now it should be ICed and keep a reference to y defined on p
"}"
"inbetween.y = 42;"
"var result = 0;"
"for (var i = 0; i < 10; i++) {"
" result += o.y;"
"}"
"result");
CHECK_EQ(42 * 10, value->Int32Value(context.local()).FromJust());
}
// Test the case when we stored callback into
// a stub, but it got invalidated later on due to override on
// global object which is between interceptor and callbacks' holders.
THREADED_TEST(InterceptorLoadICInvalidatedCallbackViaGlobal) {
v8::Isolate* isolate = CcTest::isolate();
v8::HandleScope scope(isolate);
v8::Local<v8::ObjectTemplate> templ_o = ObjectTemplate::New(isolate);
templ_o->SetHandler(
v8::NamedPropertyHandlerConfiguration(InterceptorLoadXICGetter));
v8::Local<v8::ObjectTemplate> templ_p = ObjectTemplate::New(isolate);
templ_p->SetAccessor(v8_str("y"), Return239Callback, SetOnThis);
LocalContext context;
context->Global()
->Set(context.local(), v8_str("o"),
templ_o->NewInstance(context.local()).ToLocalChecked())
.FromJust();
context->Global()
->Set(context.local(), v8_str("p"),
templ_p->NewInstance(context.local()).ToLocalChecked())
.FromJust();
v8::Local<Value> value = CompileRun(
"o.__proto__ = this;"
"this.__proto__ = p;"
"for (var i = 0; i < 10; i++) {"
" if (o.y != 239) throw 'oops: ' + o.y;"
// Now it should be ICed and keep a reference to y defined on p
"}"
"this.y = 42;"
"var result = 0;"
"for (var i = 0; i < 10; i++) {"
" result += o.y;"
"}"
"result");
CHECK_EQ(42 * 10, value->Int32Value(context.local()).FromJust());
}
// Test load of a non-existing global when a global object has an interceptor.
THREADED_TEST(InterceptorLoadGlobalICGlobalWithInterceptor) {
v8::Isolate* isolate = CcTest::isolate();
v8::HandleScope scope(isolate);
v8::Local<v8::ObjectTemplate> templ_global = v8::ObjectTemplate::New(isolate);
templ_global->SetHandler(v8::NamedPropertyHandlerConfiguration(
EmptyInterceptorGetter, EmptyInterceptorSetter));
LocalContext context(nullptr, templ_global);
i::Handle<i::JSReceiver> global_proxy =
v8::Utils::OpenHandle<Object, i::JSReceiver>(context->Global());
CHECK(global_proxy->IsJSGlobalProxy());
i::Handle<i::JSGlobalObject> global(
i::JSGlobalObject::cast(global_proxy->map()->prototype()));
CHECK(global->map()->has_named_interceptor());
v8::Local<Value> value = CompileRun(
"var f = function() { "
" try {"
" x1;"
" } catch(e) {"
" }"
" return typeof x1 === 'undefined';"
"};"
"for (var i = 0; i < 10; i++) {"
" f();"
"};"
"f();");
CHECK_EQ(true, value->BooleanValue(context.local()).FromJust());
value = CompileRun(
"var f = function() { "
" try {"
" x2;"
" return false;"
" } catch(e) {"
" return true;"
" }"
"};"
"for (var i = 0; i < 10; i++) {"
" f();"
"};"
"f();");
CHECK_EQ(true, value->BooleanValue(context.local()).FromJust());
value = CompileRun(
"var f = function() { "
" try {"
" typeof(x3);"
" return true;"
" } catch(e) {"
" return false;"
" }"
"};"
"for (var i = 0; i < 10; i++) {"
" f();"
"};"
"f();");
CHECK_EQ(true, value->BooleanValue(context.local()).FromJust());
}
static void InterceptorLoadICGetter0(
Local<Name> name, const v8::PropertyCallbackInfo<v8::Value>& info) {
ApiTestFuzzer::Fuzz();
CHECK(v8_str("x")
->Equals(info.GetIsolate()->GetCurrentContext(), name)
.FromJust());
info.GetReturnValue().Set(v8::Integer::New(info.GetIsolate(), 0));
}
THREADED_TEST(InterceptorReturningZero) {
CheckInterceptorLoadIC(InterceptorLoadICGetter0, "o.x == undefined ? 1 : 0",
0);
}
static void InterceptorStoreICSetter(
Local<Name> key, Local<Value> value,
const v8::PropertyCallbackInfo<v8::Value>& info) {
v8::Local<v8::Context> context = info.GetIsolate()->GetCurrentContext();
CHECK(v8_str("x")->Equals(context, key).FromJust());
CHECK_EQ(42, value->Int32Value(context).FromJust());
info.GetReturnValue().Set(value);
}
// This test should hit the store IC for the interceptor case.
THREADED_TEST(InterceptorStoreIC) {
v8::Isolate* isolate = CcTest::isolate();
v8::HandleScope scope(isolate);
v8::Local<v8::ObjectTemplate> templ = ObjectTemplate::New(isolate);
templ->SetHandler(v8::NamedPropertyHandlerConfiguration(
InterceptorLoadICGetter, InterceptorStoreICSetter, 0, 0, 0,
v8_str("data")));
LocalContext context;
context->Global()
->Set(context.local(), v8_str("o"),
templ->NewInstance(context.local()).ToLocalChecked())
.FromJust();
CompileRun(
"for (var i = 0; i < 1000; i++) {"
" o.x = 42;"
"}");
}
THREADED_TEST(InterceptorStoreICWithNoSetter) {
v8::Isolate* isolate = CcTest::isolate();
v8::HandleScope scope(isolate);
v8::Local<v8::ObjectTemplate> templ = ObjectTemplate::New(isolate);
templ->SetHandler(
v8::NamedPropertyHandlerConfiguration(InterceptorLoadXICGetter));
LocalContext context;
context->Global()
->Set(context.local(), v8_str("o"),
templ->NewInstance(context.local()).ToLocalChecked())
.FromJust();
v8::Local<Value> value = CompileRun(
"for (var i = 0; i < 1000; i++) {"
" o.y = 239;"
"}"
"42 + o.y");
CHECK_EQ(239 + 42, value->Int32Value(context.local()).FromJust());
}
THREADED_TEST(EmptyInterceptorDoesNotShadowAccessors) {
v8::HandleScope scope(CcTest::isolate());
Local<FunctionTemplate> parent = FunctionTemplate::New(CcTest::isolate());
Local<FunctionTemplate> child = FunctionTemplate::New(CcTest::isolate());
child->Inherit(parent);
AddAccessor(parent, v8_str("age"), SimpleAccessorGetter,
SimpleAccessorSetter);
AddInterceptor(child, EmptyInterceptorGetter, EmptyInterceptorSetter);
LocalContext env;
env->Global()
->Set(env.local(), v8_str("Child"),
child->GetFunction(env.local()).ToLocalChecked())
.FromJust();
CompileRun(
"var child = new Child;"
"child.age = 10;");
ExpectBoolean("child.hasOwnProperty('age')", false);
ExpectInt32("child.age", 10);
ExpectInt32("child.accessor_age", 10);
}
THREADED_TEST(LegacyInterceptorDoesNotSeeSymbols) {
LocalContext env;
v8::Isolate* isolate = CcTest::isolate();
v8::HandleScope scope(isolate);
Local<FunctionTemplate> parent = FunctionTemplate::New(isolate);
Local<FunctionTemplate> child = FunctionTemplate::New(isolate);
v8::Local<v8::Symbol> age = v8::Symbol::New(isolate, v8_str("age"));
child->Inherit(parent);
AddAccessor(parent, age, SymbolAccessorGetter, SymbolAccessorSetter);
AddInterceptor(child, StringInterceptorGetter, StringInterceptorSetter);
env->Global()
->Set(env.local(), v8_str("Child"),
child->GetFunction(env.local()).ToLocalChecked())
.FromJust();
env->Global()->Set(env.local(), v8_str("age"), age).FromJust();
CompileRun(
"var child = new Child;"
"child[age] = 10;");
ExpectInt32("child[age]", 10);
ExpectBoolean("child.hasOwnProperty('age')", false);
ExpectBoolean("child.hasOwnProperty('accessor_age')", true);
}
THREADED_TEST(GenericInterceptorDoesSeeSymbols) {
LocalContext env;
v8::Isolate* isolate = CcTest::isolate();
v8::HandleScope scope(isolate);
Local<FunctionTemplate> parent = FunctionTemplate::New(isolate);
Local<FunctionTemplate> child = FunctionTemplate::New(isolate);
v8::Local<v8::Symbol> age = v8::Symbol::New(isolate, v8_str("age"));
v8::Local<v8::Symbol> anon = v8::Symbol::New(isolate);
child->Inherit(parent);
AddAccessor(parent, age, SymbolAccessorGetter, SymbolAccessorSetter);
AddInterceptor(child, GenericInterceptorGetter, GenericInterceptorSetter);
env->Global()
->Set(env.local(), v8_str("Child"),
child->GetFunction(env.local()).ToLocalChecked())
.FromJust();
env->Global()->Set(env.local(), v8_str("age"), age).FromJust();
env->Global()->Set(env.local(), v8_str("anon"), anon).FromJust();
CompileRun(
"var child = new Child;"
"child[age] = 10;");
ExpectInt32("child[age]", 10);
ExpectInt32("child._sym_age", 10);
// Check that it also sees strings.
CompileRun("child.foo = 47");
ExpectInt32("child.foo", 47);
ExpectInt32("child._str_foo", 47);
// Check that the interceptor can punt (in this case, on anonymous symbols).
CompileRun("child[anon] = 31337");
ExpectInt32("child[anon]", 31337);
}
THREADED_TEST(NamedPropertyHandlerGetter) {
echo_named_call_count = 0;
v8::HandleScope scope(CcTest::isolate());
v8::Local<v8::FunctionTemplate> templ =
v8::FunctionTemplate::New(CcTest::isolate());
templ->InstanceTemplate()->SetHandler(v8::NamedPropertyHandlerConfiguration(
EchoNamedProperty, 0, 0, 0, 0, v8_str("data")));
LocalContext env;
env->Global()
->Set(env.local(), v8_str("obj"), templ->GetFunction(env.local())
.ToLocalChecked()
->NewInstance(env.local())
.ToLocalChecked())
.FromJust();
CHECK_EQ(echo_named_call_count, 0);
v8_compile("obj.x")->Run(env.local()).ToLocalChecked();
CHECK_EQ(echo_named_call_count, 1);
const char* code = "var str = 'oddle'; obj[str] + obj.poddle;";
v8::Local<Value> str = CompileRun(code);
String::Utf8Value value(str);
CHECK_EQ(0, strcmp(*value, "oddlepoddle"));
// Check default behavior
CHECK_EQ(10, v8_compile("obj.flob = 10;")
->Run(env.local())
.ToLocalChecked()
->Int32Value(env.local())
.FromJust());
CHECK(v8_compile("'myProperty' in obj")
->Run(env.local())
.ToLocalChecked()
->BooleanValue(env.local())
.FromJust());
CHECK(v8_compile("delete obj.myProperty")
->Run(env.local())
.ToLocalChecked()
->BooleanValue(env.local())
.FromJust());
}
int echo_indexed_call_count = 0;
static void EchoIndexedProperty(
uint32_t index, const v8::PropertyCallbackInfo<v8::Value>& info) {
ApiTestFuzzer::Fuzz();
CHECK(v8_num(637)
->Equals(info.GetIsolate()->GetCurrentContext(), info.Data())
.FromJust());
echo_indexed_call_count++;
info.GetReturnValue().Set(v8_num(index));
}
THREADED_TEST(IndexedPropertyHandlerGetter) {
v8::Isolate* isolate = CcTest::isolate();
v8::HandleScope scope(isolate);
v8::Local<v8::FunctionTemplate> templ = v8::FunctionTemplate::New(isolate);
templ->InstanceTemplate()->SetHandler(v8::IndexedPropertyHandlerConfiguration(
EchoIndexedProperty, 0, 0, 0, 0, v8_num(637)));
LocalContext env;
env->Global()
->Set(env.local(), v8_str("obj"), templ->GetFunction(env.local())
.ToLocalChecked()
->NewInstance(env.local())
.ToLocalChecked())
.FromJust();
Local<Script> script = v8_compile("obj[900]");
CHECK_EQ(script->Run(env.local())
.ToLocalChecked()
->Int32Value(env.local())
.FromJust(),
900);
}
THREADED_TEST(PropertyHandlerInPrototype) {
LocalContext env;
v8::Isolate* isolate = env->GetIsolate();
v8::HandleScope scope(isolate);
// Set up a prototype chain with three interceptors.
v8::Local<v8::FunctionTemplate> templ = v8::FunctionTemplate::New(isolate);
templ->InstanceTemplate()->SetHandler(v8::IndexedPropertyHandlerConfiguration(
CheckThisIndexedPropertyHandler, CheckThisIndexedPropertySetter,
CheckThisIndexedPropertyQuery, CheckThisIndexedPropertyDeleter,
CheckThisIndexedPropertyEnumerator));
templ->InstanceTemplate()->SetHandler(v8::NamedPropertyHandlerConfiguration(
CheckThisNamedPropertyHandler, CheckThisNamedPropertySetter,
CheckThisNamedPropertyQuery, CheckThisNamedPropertyDeleter,
CheckThisNamedPropertyEnumerator));
bottom = templ->GetFunction(env.local())
.ToLocalChecked()
->NewInstance(env.local())
.ToLocalChecked();
Local<v8::Object> top = templ->GetFunction(env.local())
.ToLocalChecked()
->NewInstance(env.local())
.ToLocalChecked();
Local<v8::Object> middle = templ->GetFunction(env.local())
.ToLocalChecked()
->NewInstance(env.local())
.ToLocalChecked();
bottom->SetPrototype(env.local(), middle).FromJust();
middle->SetPrototype(env.local(), top).FromJust();
env->Global()->Set(env.local(), v8_str("obj"), bottom).FromJust();
// Indexed and named get.
CompileRun("obj[0]");
CompileRun("obj.x");
// Indexed and named set.
CompileRun("obj[1] = 42");
CompileRun("obj.y = 42");
// Indexed and named query.
CompileRun("0 in obj");
CompileRun("'x' in obj");
// Indexed and named deleter.
CompileRun("delete obj[0]");
CompileRun("delete obj.x");
// Enumerators.
CompileRun("for (var p in obj) ;");
}
bool is_bootstrapping = false;
static void PrePropertyHandlerGet(
Local<Name> key, const v8::PropertyCallbackInfo<v8::Value>& info) {
ApiTestFuzzer::Fuzz();
if (!is_bootstrapping &&
v8_str("pre")
->Equals(info.GetIsolate()->GetCurrentContext(), key)
.FromJust()) {
info.GetReturnValue().Set(v8_str("PrePropertyHandler: pre"));
}
}
static void PrePropertyHandlerQuery(
Local<Name> key, const v8::PropertyCallbackInfo<v8::Integer>& info) {
if (!is_bootstrapping &&
v8_str("pre")
->Equals(info.GetIsolate()->GetCurrentContext(), key)
.FromJust()) {
info.GetReturnValue().Set(static_cast<int32_t>(v8::None));
}
}
THREADED_TEST(PrePropertyHandler) {
v8::Isolate* isolate = CcTest::isolate();
v8::HandleScope scope(isolate);
v8::Local<v8::FunctionTemplate> desc = v8::FunctionTemplate::New(isolate);
desc->InstanceTemplate()->SetHandler(v8::NamedPropertyHandlerConfiguration(
PrePropertyHandlerGet, 0, PrePropertyHandlerQuery));
is_bootstrapping = true;
LocalContext env(NULL, desc->InstanceTemplate());
is_bootstrapping = false;
CompileRun("var pre = 'Object: pre'; var on = 'Object: on';");
v8::Local<Value> result_pre = CompileRun("pre");
CHECK(v8_str("PrePropertyHandler: pre")
->Equals(env.local(), result_pre)
.FromJust());
v8::Local<Value> result_on = CompileRun("on");
CHECK(v8_str("Object: on")->Equals(env.local(), result_on).FromJust());
v8::Local<Value> result_post = CompileRun("post");
CHECK(result_post.IsEmpty());
}
THREADED_TEST(EmptyInterceptorBreakTransitions) {
v8::HandleScope scope(CcTest::isolate());
Local<FunctionTemplate> templ = FunctionTemplate::New(CcTest::isolate());
AddInterceptor(templ, EmptyInterceptorGetter, EmptyInterceptorSetter);
LocalContext env;
env->Global()
->Set(env.local(), v8_str("Constructor"),
templ->GetFunction(env.local()).ToLocalChecked())
.FromJust();
CompileRun(
"var o1 = new Constructor;"
"o1.a = 1;" // Ensure a and x share the descriptor array.
"Object.defineProperty(o1, 'x', {value: 10});");
CompileRun(
"var o2 = new Constructor;"
"o2.a = 1;"
"Object.defineProperty(o2, 'x', {value: 10});");
}
THREADED_TEST(EmptyInterceptorDoesNotShadowJSAccessors) {
v8::Isolate* isolate = CcTest::isolate();
v8::HandleScope scope(isolate);
Local<FunctionTemplate> parent = FunctionTemplate::New(isolate);
Local<FunctionTemplate> child = FunctionTemplate::New(isolate);
child->Inherit(parent);
AddInterceptor(child, EmptyInterceptorGetter, EmptyInterceptorSetter);
LocalContext env;
env->Global()
->Set(env.local(), v8_str("Child"),
child->GetFunction(env.local()).ToLocalChecked())
.FromJust();
CompileRun(
"var child = new Child;"
"var parent = child.__proto__;"
"Object.defineProperty(parent, 'age', "
" {get: function(){ return this.accessor_age; }, "
" set: function(v){ this.accessor_age = v; }, "
" enumerable: true, configurable: true});"
"child.age = 10;");
ExpectBoolean("child.hasOwnProperty('age')", false);
ExpectInt32("child.age", 10);
ExpectInt32("child.accessor_age", 10);
}
THREADED_TEST(EmptyInterceptorDoesNotShadowApiAccessors) {
v8::Isolate* isolate = CcTest::isolate();
v8::HandleScope scope(isolate);
Local<FunctionTemplate> parent = FunctionTemplate::New(isolate);
auto returns_42 = FunctionTemplate::New(isolate, Returns42);
parent->PrototypeTemplate()->SetAccessorProperty(v8_str("age"), returns_42);
Local<FunctionTemplate> child = FunctionTemplate::New(isolate);
child->Inherit(parent);
AddInterceptor(child, EmptyInterceptorGetter, EmptyInterceptorSetter);
LocalContext env;
env->Global()
->Set(env.local(), v8_str("Child"),
child->GetFunction(env.local()).ToLocalChecked())
.FromJust();
CompileRun(
"var child = new Child;"
"var parent = child.__proto__;");
ExpectBoolean("child.hasOwnProperty('age')", false);
ExpectInt32("child.age", 42);
// Check interceptor followup.
ExpectInt32(
"var result;"
"for (var i = 0; i < 4; ++i) {"
" result = child.age;"
"}"
"result",
42);
}
THREADED_TEST(EmptyInterceptorDoesNotAffectJSProperties) {
v8::Isolate* isolate = CcTest::isolate();
v8::HandleScope scope(isolate);
Local<FunctionTemplate> parent = FunctionTemplate::New(isolate);
Local<FunctionTemplate> child = FunctionTemplate::New(isolate);
child->Inherit(parent);
AddInterceptor(child, EmptyInterceptorGetter, EmptyInterceptorSetter);
LocalContext env;
env->Global()
->Set(env.local(), v8_str("Child"),
child->GetFunction(env.local()).ToLocalChecked())
.FromJust();
CompileRun(
"var child = new Child;"
"var parent = child.__proto__;"
"parent.name = 'Alice';");
ExpectBoolean("child.hasOwnProperty('name')", false);
ExpectString("child.name", "Alice");
CompileRun("child.name = 'Bob';");
ExpectString("child.name", "Bob");
ExpectBoolean("child.hasOwnProperty('name')", true);
ExpectString("parent.name", "Alice");
}
THREADED_TEST(SwitchFromInterceptorToAccessor) {
v8::HandleScope scope(CcTest::isolate());
Local<FunctionTemplate> templ = FunctionTemplate::New(CcTest::isolate());
AddAccessor(templ, v8_str("age"), SimpleAccessorGetter, SimpleAccessorSetter);
AddInterceptor(templ, InterceptorGetter, InterceptorSetter);
LocalContext env;
env->Global()
->Set(env.local(), v8_str("Obj"),
templ->GetFunction(env.local()).ToLocalChecked())
.FromJust();
CompileRun(
"var obj = new Obj;"
"function setAge(i){ obj.age = i; };"
"for(var i = 0; i <= 10000; i++) setAge(i);");
// All i < 10000 go to the interceptor.
ExpectInt32("obj.interceptor_age", 9999);
// The last i goes to the accessor.
ExpectInt32("obj.accessor_age", 10000);
}
THREADED_TEST(SwitchFromAccessorToInterceptor) {
v8::HandleScope scope(CcTest::isolate());
Local<FunctionTemplate> templ = FunctionTemplate::New(CcTest::isolate());
AddAccessor(templ, v8_str("age"), SimpleAccessorGetter, SimpleAccessorSetter);
AddInterceptor(templ, InterceptorGetter, InterceptorSetter);
LocalContext env;
env->Global()
->Set(env.local(), v8_str("Obj"),
templ->GetFunction(env.local()).ToLocalChecked())
.FromJust();
CompileRun(
"var obj = new Obj;"
"function setAge(i){ obj.age = i; };"
"for(var i = 20000; i >= 9999; i--) setAge(i);");
// All i >= 10000 go to the accessor.
ExpectInt32("obj.accessor_age", 10000);
// The last i goes to the interceptor.
ExpectInt32("obj.interceptor_age", 9999);
}
THREADED_TEST(SwitchFromInterceptorToAccessorWithInheritance) {
v8::HandleScope scope(CcTest::isolate());
Local<FunctionTemplate> parent = FunctionTemplate::New(CcTest::isolate());
Local<FunctionTemplate> child = FunctionTemplate::New(CcTest::isolate());
child->Inherit(parent);
AddAccessor(parent, v8_str("age"), SimpleAccessorGetter,
SimpleAccessorSetter);
AddInterceptor(child, InterceptorGetter, InterceptorSetter);
LocalContext env;
env->Global()
->Set(env.local(), v8_str("Child"),
child->GetFunction(env.local()).ToLocalChecked())
.FromJust();
CompileRun(
"var child = new Child;"
"function setAge(i){ child.age = i; };"
"for(var i = 0; i <= 10000; i++) setAge(i);");
// All i < 10000 go to the interceptor.
ExpectInt32("child.interceptor_age", 9999);
// The last i goes to the accessor.
ExpectInt32("child.accessor_age", 10000);
}
THREADED_TEST(SwitchFromAccessorToInterceptorWithInheritance) {
v8::HandleScope scope(CcTest::isolate());
Local<FunctionTemplate> parent = FunctionTemplate::New(CcTest::isolate());
Local<FunctionTemplate> child = FunctionTemplate::New(CcTest::isolate());
child->Inherit(parent);
AddAccessor(parent, v8_str("age"), SimpleAccessorGetter,
SimpleAccessorSetter);
AddInterceptor(child, InterceptorGetter, InterceptorSetter);
LocalContext env;
env->Global()
->Set(env.local(), v8_str("Child"),
child->GetFunction(env.local()).ToLocalChecked())
.FromJust();
CompileRun(
"var child = new Child;"
"function setAge(i){ child.age = i; };"
"for(var i = 20000; i >= 9999; i--) setAge(i);");
// All i >= 10000 go to the accessor.
ExpectInt32("child.accessor_age", 10000);
// The last i goes to the interceptor.
ExpectInt32("child.interceptor_age", 9999);
}
THREADED_TEST(SwitchFromInterceptorToJSAccessor) {
v8::HandleScope scope(CcTest::isolate());
Local<FunctionTemplate> templ = FunctionTemplate::New(CcTest::isolate());
AddInterceptor(templ, InterceptorGetter, InterceptorSetter);
LocalContext env;
env->Global()
->Set(env.local(), v8_str("Obj"),
templ->GetFunction(env.local()).ToLocalChecked())
.FromJust();
CompileRun(
"var obj = new Obj;"
"function setter(i) { this.accessor_age = i; };"
"function getter() { return this.accessor_age; };"
"function setAge(i) { obj.age = i; };"
"Object.defineProperty(obj, 'age', { get:getter, set:setter });"
"for(var i = 0; i <= 10000; i++) setAge(i);");
// All i < 10000 go to the interceptor.
ExpectInt32("obj.interceptor_age", 9999);
// The last i goes to the JavaScript accessor.
ExpectInt32("obj.accessor_age", 10000);
// The installed JavaScript getter is still intact.
// This last part is a regression test for issue 1651 and relies on the fact
// that both interceptor and accessor are being installed on the same object.
ExpectInt32("obj.age", 10000);
ExpectBoolean("obj.hasOwnProperty('age')", true);
ExpectUndefined("Object.getOwnPropertyDescriptor(obj, 'age').value");
}
THREADED_TEST(SwitchFromJSAccessorToInterceptor) {
v8::HandleScope scope(CcTest::isolate());
Local<FunctionTemplate> templ = FunctionTemplate::New(CcTest::isolate());
AddInterceptor(templ, InterceptorGetter, InterceptorSetter);
LocalContext env;
env->Global()
->Set(env.local(), v8_str("Obj"),
templ->GetFunction(env.local()).ToLocalChecked())
.FromJust();
CompileRun(
"var obj = new Obj;"
"function setter(i) { this.accessor_age = i; };"
"function getter() { return this.accessor_age; };"
"function setAge(i) { obj.age = i; };"
"Object.defineProperty(obj, 'age', { get:getter, set:setter });"
"for(var i = 20000; i >= 9999; i--) setAge(i);");
// All i >= 10000 go to the accessor.
ExpectInt32("obj.accessor_age", 10000);
// The last i goes to the interceptor.
ExpectInt32("obj.interceptor_age", 9999);
// The installed JavaScript getter is still intact.
// This last part is a regression test for issue 1651 and relies on the fact
// that both interceptor and accessor are being installed on the same object.
ExpectInt32("obj.age", 10000);
ExpectBoolean("obj.hasOwnProperty('age')", true);
ExpectUndefined("Object.getOwnPropertyDescriptor(obj, 'age').value");
}
THREADED_TEST(SwitchFromInterceptorToProperty) {
v8::HandleScope scope(CcTest::isolate());
Local<FunctionTemplate> parent = FunctionTemplate::New(CcTest::isolate());
Local<FunctionTemplate> child = FunctionTemplate::New(CcTest::isolate());
child->Inherit(parent);
AddInterceptor(child, InterceptorGetter, InterceptorSetter);
LocalContext env;
env->Global()
->Set(env.local(), v8_str("Child"),
child->GetFunction(env.local()).ToLocalChecked())
.FromJust();
CompileRun(
"var child = new Child;"
"function setAge(i){ child.age = i; };"
"for(var i = 0; i <= 10000; i++) setAge(i);");
// All i < 10000 go to the interceptor.
ExpectInt32("child.interceptor_age", 9999);
// The last i goes to child's own property.
ExpectInt32("child.age", 10000);
}
THREADED_TEST(SwitchFromPropertyToInterceptor) {
v8::HandleScope scope(CcTest::isolate());
Local<FunctionTemplate> parent = FunctionTemplate::New(CcTest::isolate());
Local<FunctionTemplate> child = FunctionTemplate::New(CcTest::isolate());
child->Inherit(parent);
AddInterceptor(child, InterceptorGetter, InterceptorSetter);
LocalContext env;
env->Global()
->Set(env.local(), v8_str("Child"),
child->GetFunction(env.local()).ToLocalChecked())
.FromJust();
CompileRun(
"var child = new Child;"
"function setAge(i){ child.age = i; };"
"for(var i = 20000; i >= 9999; i--) setAge(i);");
// All i >= 10000 go to child's own property.
ExpectInt32("child.age", 10000);
// The last i goes to the interceptor.
ExpectInt32("child.interceptor_age", 9999);
}
static bool interceptor_for_hidden_properties_called;
static void InterceptorForHiddenProperties(
Local<Name> name, const v8::PropertyCallbackInfo<v8::Value>& info) {
interceptor_for_hidden_properties_called = true;
}
THREADED_TEST(HiddenPropertiesWithInterceptors) {
LocalContext context;
v8::Isolate* isolate = context->GetIsolate();
v8::HandleScope scope(isolate);
interceptor_for_hidden_properties_called = false;
v8::Local<v8::Private> key =
v8::Private::New(isolate, v8_str("api-test::hidden-key"));
// Associate an interceptor with an object and start setting hidden values.
Local<v8::FunctionTemplate> fun_templ = v8::FunctionTemplate::New(isolate);
Local<v8::ObjectTemplate> instance_templ = fun_templ->InstanceTemplate();
instance_templ->SetHandler(
v8::NamedPropertyHandlerConfiguration(InterceptorForHiddenProperties));
Local<v8::Function> function =
fun_templ->GetFunction(context.local()).ToLocalChecked();
Local<v8::Object> obj =
function->NewInstance(context.local()).ToLocalChecked();
CHECK(obj->SetPrivate(context.local(), key, v8::Integer::New(isolate, 2302))
.FromJust());
CHECK_EQ(2302, obj->GetPrivate(context.local(), key)
.ToLocalChecked()
->Int32Value(context.local())
.FromJust());
CHECK(!interceptor_for_hidden_properties_called);
}
static void XPropertyGetter(Local<Name> property,
const v8::PropertyCallbackInfo<v8::Value>& info) {
ApiTestFuzzer::Fuzz();
CHECK(info.Data()->IsUndefined());
info.GetReturnValue().Set(property);
}
THREADED_TEST(NamedInterceptorPropertyRead) {
v8::Isolate* isolate = CcTest::isolate();
v8::HandleScope scope(isolate);
Local<ObjectTemplate> templ = ObjectTemplate::New(isolate);
templ->SetHandler(v8::NamedPropertyHandlerConfiguration(XPropertyGetter));
LocalContext context;
context->Global()
->Set(context.local(), v8_str("obj"),
templ->NewInstance(context.local()).ToLocalChecked())
.FromJust();
Local<Script> script = v8_compile("obj.x");
for (int i = 0; i < 10; i++) {
Local<Value> result = script->Run(context.local()).ToLocalChecked();
CHECK(result->Equals(context.local(), v8_str("x")).FromJust());
}
}
THREADED_TEST(NamedInterceptorDictionaryIC) {
v8::Isolate* isolate = CcTest::isolate();
v8::HandleScope scope(isolate);
Local<ObjectTemplate> templ = ObjectTemplate::New(isolate);
templ->SetHandler(v8::NamedPropertyHandlerConfiguration(XPropertyGetter));
LocalContext context;
// Create an object with a named interceptor.
context->Global()
->Set(context.local(), v8_str("interceptor_obj"),
templ->NewInstance(context.local()).ToLocalChecked())
.FromJust();
Local<Script> script = v8_compile("interceptor_obj.x");
for (int i = 0; i < 10; i++) {
Local<Value> result = script->Run(context.local()).ToLocalChecked();
CHECK(result->Equals(context.local(), v8_str("x")).FromJust());
}
// Create a slow case object and a function accessing a property in
// that slow case object (with dictionary probing in generated
// code). Then force object with a named interceptor into slow-case,
// pass it to the function, and check that the interceptor is called
// instead of accessing the local property.
Local<Value> result = CompileRun(
"function get_x(o) { return o.x; };"
"var obj = { x : 42, y : 0 };"
"delete obj.y;"
"for (var i = 0; i < 10; i++) get_x(obj);"
"interceptor_obj.x = 42;"
"interceptor_obj.y = 10;"
"delete interceptor_obj.y;"
"get_x(interceptor_obj)");
CHECK(result->Equals(context.local(), v8_str("x")).FromJust());
}
THREADED_TEST(NamedInterceptorDictionaryICMultipleContext) {
v8::Isolate* isolate = CcTest::isolate();
v8::HandleScope scope(isolate);
v8::Local<Context> context1 = Context::New(isolate);
context1->Enter();
Local<ObjectTemplate> templ = ObjectTemplate::New(isolate);
templ->SetHandler(v8::NamedPropertyHandlerConfiguration(XPropertyGetter));
// Create an object with a named interceptor.
v8::Local<v8::Object> object = templ->NewInstance(context1).ToLocalChecked();
context1->Global()
->Set(context1, v8_str("interceptor_obj"), object)
.FromJust();
// Force the object into the slow case.
CompileRun(
"interceptor_obj.y = 0;"
"delete interceptor_obj.y;");
context1->Exit();
{
// Introduce the object into a different context.
// Repeat named loads to exercise ICs.
LocalContext context2;
context2->Global()
->Set(context2.local(), v8_str("interceptor_obj"), object)
.FromJust();
Local<Value> result = CompileRun(
"function get_x(o) { return o.x; }"
"interceptor_obj.x = 42;"
"for (var i=0; i != 10; i++) {"
" get_x(interceptor_obj);"
"}"
"get_x(interceptor_obj)");
// Check that the interceptor was actually invoked.
CHECK(result->Equals(context2.local(), v8_str("x")).FromJust());
}
// Return to the original context and force some object to the slow case
// to cause the NormalizedMapCache to verify.
context1->Enter();
CompileRun("var obj = { x : 0 }; delete obj.x;");
context1->Exit();
}
static void SetXOnPrototypeGetter(
Local<Name> property, const v8::PropertyCallbackInfo<v8::Value>& info) {
// Set x on the prototype object and do not handle the get request.
v8::Local<v8::Value> proto = info.Holder()->GetPrototype();
proto.As<v8::Object>()
->Set(info.GetIsolate()->GetCurrentContext(), v8_str("x"),
v8::Integer::New(info.GetIsolate(), 23))
.FromJust();
}
// This is a regression test for http://crbug.com/20104. Map
// transitions should not interfere with post interceptor lookup.
THREADED_TEST(NamedInterceptorMapTransitionRead) {
v8::Isolate* isolate = CcTest::isolate();
v8::HandleScope scope(isolate);
Local<v8::FunctionTemplate> function_template =
v8::FunctionTemplate::New(isolate);
Local<v8::ObjectTemplate> instance_template =
function_template->InstanceTemplate();
instance_template->SetHandler(
v8::NamedPropertyHandlerConfiguration(SetXOnPrototypeGetter));
LocalContext context;
context->Global()
->Set(context.local(), v8_str("F"),
function_template->GetFunction(context.local()).ToLocalChecked())
.FromJust();
// Create an instance of F and introduce a map transition for x.
CompileRun("var o = new F(); o.x = 23;");
// Create an instance of F and invoke the getter. The result should be 23.
Local<Value> result = CompileRun("o = new F(); o.x");
CHECK_EQ(result->Int32Value(context.local()).FromJust(), 23);
}
static void IndexedPropertyGetter(
uint32_t index, const v8::PropertyCallbackInfo<v8::Value>& info) {
ApiTestFuzzer::Fuzz();
if (index == 37) {
info.GetReturnValue().Set(v8_num(625));
}
}
static void IndexedPropertySetter(
uint32_t index, Local<Value> value,
const v8::PropertyCallbackInfo<v8::Value>& info) {
ApiTestFuzzer::Fuzz();
if (index == 39) {
info.GetReturnValue().Set(value);
}
}
THREADED_TEST(IndexedInterceptorWithIndexedAccessor) {
v8::Isolate* isolate = CcTest::isolate();
v8::HandleScope scope(isolate);
Local<ObjectTemplate> templ = ObjectTemplate::New(isolate);
templ->SetHandler(v8::IndexedPropertyHandlerConfiguration(
IndexedPropertyGetter, IndexedPropertySetter));
LocalContext context;
context->Global()
->Set(context.local(), v8_str("obj"),
templ->NewInstance(context.local()).ToLocalChecked())
.FromJust();
Local<Script> getter_script =
v8_compile("obj.__defineGetter__(\"3\", function(){return 5;});obj[3];");
Local<Script> setter_script = v8_compile(
"obj.__defineSetter__(\"17\", function(val){this.foo = val;});"
"obj[17] = 23;"
"obj.foo;");
Local<Script> interceptor_setter_script = v8_compile(
"obj.__defineSetter__(\"39\", function(val){this.foo = \"hit\";});"
"obj[39] = 47;"
"obj.foo;"); // This setter should not run, due to the interceptor.
Local<Script> interceptor_getter_script = v8_compile("obj[37];");
Local<Value> result = getter_script->Run(context.local()).ToLocalChecked();
CHECK(v8_num(5)->Equals(context.local(), result).FromJust());
result = setter_script->Run(context.local()).ToLocalChecked();
CHECK(v8_num(23)->Equals(context.local(), result).FromJust());
result = interceptor_setter_script->Run(context.local()).ToLocalChecked();
CHECK(v8_num(23)->Equals(context.local(), result).FromJust());
result = interceptor_getter_script->Run(context.local()).ToLocalChecked();
CHECK(v8_num(625)->Equals(context.local(), result).FromJust());
}
static void UnboxedDoubleIndexedPropertyGetter(
uint32_t index, const v8::PropertyCallbackInfo<v8::Value>& info) {
ApiTestFuzzer::Fuzz();
if (index < 25) {
info.GetReturnValue().Set(v8_num(index));
}
}
static void UnboxedDoubleIndexedPropertySetter(
uint32_t index, Local<Value> value,
const v8::PropertyCallbackInfo<v8::Value>& info) {
ApiTestFuzzer::Fuzz();
if (index < 25) {
info.GetReturnValue().Set(v8_num(index));
}
}
void UnboxedDoubleIndexedPropertyEnumerator(
const v8::PropertyCallbackInfo<v8::Array>& info) {
// Force the list of returned keys to be stored in a FastDoubleArray.
Local<Script> indexed_property_names_script = v8_compile(
"keys = new Array(); keys[125000] = 1;"
"for(i = 0; i < 80000; i++) { keys[i] = i; };"
"keys.length = 25; keys;");
Local<Value> result =
indexed_property_names_script->Run(info.GetIsolate()->GetCurrentContext())
.ToLocalChecked();
info.GetReturnValue().Set(Local<v8::Array>::Cast(result));
}
// Make sure that the the interceptor code in the runtime properly handles
// merging property name lists for double-array-backed arrays.
THREADED_TEST(IndexedInterceptorUnboxedDoubleWithIndexedAccessor) {
v8::Isolate* isolate = CcTest::isolate();
v8::HandleScope scope(isolate);
Local<ObjectTemplate> templ = ObjectTemplate::New(isolate);
templ->SetHandler(v8::IndexedPropertyHandlerConfiguration(
UnboxedDoubleIndexedPropertyGetter, UnboxedDoubleIndexedPropertySetter, 0,
0, UnboxedDoubleIndexedPropertyEnumerator));
LocalContext context;
context->Global()
->Set(context.local(), v8_str("obj"),
templ->NewInstance(context.local()).ToLocalChecked())
.FromJust();
// When obj is created, force it to be Stored in a FastDoubleArray.
Local<Script> create_unboxed_double_script = v8_compile(
"obj[125000] = 1; for(i = 0; i < 80000; i+=2) { obj[i] = i; } "
"key_count = 0; "
"for (x in obj) {key_count++;};"
"obj;");
Local<Value> result =
create_unboxed_double_script->Run(context.local()).ToLocalChecked();
CHECK(result->ToObject(context.local())
.ToLocalChecked()
->HasRealIndexedProperty(context.local(), 2000)
.FromJust());
Local<Script> key_count_check = v8_compile("key_count;");
result = key_count_check->Run(context.local()).ToLocalChecked();
CHECK(v8_num(40013)->Equals(context.local(), result).FromJust());
}
void SloppyArgsIndexedPropertyEnumerator(
const v8::PropertyCallbackInfo<v8::Array>& info) {
// Force the list of returned keys to be stored in a Arguments object.
Local<Script> indexed_property_names_script = v8_compile(
"function f(w,x) {"
" return arguments;"
"}"
"keys = f(0, 1, 2, 3);"
"keys;");
Local<Object> result = Local<Object>::Cast(
indexed_property_names_script->Run(info.GetIsolate()->GetCurrentContext())
.ToLocalChecked());
// Have to populate the handle manually, as it's not Cast-able.
i::Handle<i::JSReceiver> o =
v8::Utils::OpenHandle<Object, i::JSReceiver>(result);
i::Handle<i::JSArray> array(reinterpret_cast<i::JSArray*>(*o));
info.GetReturnValue().Set(v8::Utils::ToLocal(array));
}
static void SloppyIndexedPropertyGetter(
uint32_t index, const v8::PropertyCallbackInfo<v8::Value>& info) {
ApiTestFuzzer::Fuzz();
if (index < 4) {
info.GetReturnValue().Set(v8_num(index));
}
}
// Make sure that the the interceptor code in the runtime properly handles
// merging property name lists for non-string arguments arrays.
THREADED_TEST(IndexedInterceptorSloppyArgsWithIndexedAccessor) {
v8::Isolate* isolate = CcTest::isolate();
v8::HandleScope scope(isolate);
Local<ObjectTemplate> templ = ObjectTemplate::New(isolate);
templ->SetHandler(v8::IndexedPropertyHandlerConfiguration(
SloppyIndexedPropertyGetter, 0, 0, 0,
SloppyArgsIndexedPropertyEnumerator));
LocalContext context;
context->Global()
->Set(context.local(), v8_str("obj"),
templ->NewInstance(context.local()).ToLocalChecked())
.FromJust();
Local<Script> create_args_script = v8_compile(
"var key_count = 0;"
"for (x in obj) {key_count++;} key_count;");
Local<Value> result =
create_args_script->Run(context.local()).ToLocalChecked();
CHECK(v8_num(4)->Equals(context.local(), result).FromJust());
}
static void IdentityIndexedPropertyGetter(
uint32_t index, const v8::PropertyCallbackInfo<v8::Value>& info) {
info.GetReturnValue().Set(index);
}
THREADED_TEST(IndexedInterceptorWithGetOwnPropertyDescriptor) {
v8::Isolate* isolate = CcTest::isolate();
v8::HandleScope scope(isolate);
Local<ObjectTemplate> templ = ObjectTemplate::New(isolate);
templ->SetHandler(
v8::IndexedPropertyHandlerConfiguration(IdentityIndexedPropertyGetter));
LocalContext context;
context->Global()
->Set(context.local(), v8_str("obj"),
templ->NewInstance(context.local()).ToLocalChecked())
.FromJust();
// Check fast object case.
const char* fast_case_code =
"Object.getOwnPropertyDescriptor(obj, 0).value.toString()";
ExpectString(fast_case_code, "0");
// Check slow case.
const char* slow_case_code =
"obj.x = 1; delete obj.x;"
"Object.getOwnPropertyDescriptor(obj, 1).value.toString()";
ExpectString(slow_case_code, "1");
}
THREADED_TEST(IndexedInterceptorWithNoSetter) {
v8::Isolate* isolate = CcTest::isolate();
v8::HandleScope scope(isolate);
Local<ObjectTemplate> templ = ObjectTemplate::New(isolate);
templ->SetHandler(
v8::IndexedPropertyHandlerConfiguration(IdentityIndexedPropertyGetter));
LocalContext context;
context->Global()
->Set(context.local(), v8_str("obj"),
templ->NewInstance(context.local()).ToLocalChecked())
.FromJust();
const char* code =
"try {"
" obj[0] = 239;"
" for (var i = 0; i < 100; i++) {"
" var v = obj[0];"
" if (v != 0) throw 'Wrong value ' + v + ' at iteration ' + i;"
" }"
" 'PASSED'"
"} catch(e) {"
" e"
"}";
ExpectString(code, "PASSED");
}
static bool AccessAlwaysBlocked(Local<v8::Context> accessing_context,
Local<v8::Object> accessed_object,
Local<v8::Value> data) {
return false;
}
THREADED_TEST(IndexedInterceptorWithAccessorCheck) {
v8::Isolate* isolate = CcTest::isolate();
v8::HandleScope scope(isolate);
Local<ObjectTemplate> templ = ObjectTemplate::New(isolate);
templ->SetHandler(
v8::IndexedPropertyHandlerConfiguration(IdentityIndexedPropertyGetter));
templ->SetAccessCheckCallback(AccessAlwaysBlocked);
LocalContext context;
Local<v8::Object> obj = templ->NewInstance(context.local()).ToLocalChecked();
context->Global()->Set(context.local(), v8_str("obj"), obj).FromJust();
const char* code =
"var result = 'PASSED';"
"for (var i = 0; i < 100; i++) {"
" try {"
" var v = obj[0];"
" result = 'Wrong value ' + v + ' at iteration ' + i;"
" break;"
" } catch (e) {"
" /* pass */"
" }"
"}"
"result";
ExpectString(code, "PASSED");
}
THREADED_TEST(IndexedInterceptorWithDifferentIndices) {
v8::Isolate* isolate = CcTest::isolate();
v8::HandleScope scope(isolate);
Local<ObjectTemplate> templ = ObjectTemplate::New(isolate);
templ->SetHandler(
v8::IndexedPropertyHandlerConfiguration(IdentityIndexedPropertyGetter));
LocalContext context;
Local<v8::Object> obj = templ->NewInstance(context.local()).ToLocalChecked();
context->Global()->Set(context.local(), v8_str("obj"), obj).FromJust();
const char* code =
"try {"
" for (var i = 0; i < 100; i++) {"
" var v = obj[i];"
" if (v != i) throw 'Wrong value ' + v + ' at iteration ' + i;"
" }"
" 'PASSED'"
"} catch(e) {"
" e"
"}";
ExpectString(code, "PASSED");
}
THREADED_TEST(IndexedInterceptorWithNegativeIndices) {
v8::Isolate* isolate = CcTest::isolate();
v8::HandleScope scope(isolate);
Local<ObjectTemplate> templ = ObjectTemplate::New(isolate);
templ->SetHandler(
v8::IndexedPropertyHandlerConfiguration(IdentityIndexedPropertyGetter));
LocalContext context;
Local<v8::Object> obj = templ->NewInstance(context.local()).ToLocalChecked();
context->Global()->Set(context.local(), v8_str("obj"), obj).FromJust();
const char* code =
"try {"
" for (var i = 0; i < 100; i++) {"
" var expected = i;"
" var key = i;"
" if (i == 25) {"
" key = -1;"
" expected = undefined;"
" }"
" if (i == 50) {"
" /* probe minimal Smi number on 32-bit platforms */"
" key = -(1 << 30);"
" expected = undefined;"
" }"
" if (i == 75) {"
" /* probe minimal Smi number on 64-bit platforms */"
" key = 1 << 31;"
" expected = undefined;"
" }"
" var v = obj[key];"
" if (v != expected) throw 'Wrong value ' + v + ' at iteration ' + i;"
" }"
" 'PASSED'"
"} catch(e) {"
" e"
"}";
ExpectString(code, "PASSED");
}
THREADED_TEST(IndexedInterceptorWithNotSmiLookup) {
v8::Isolate* isolate = CcTest::isolate();
v8::HandleScope scope(isolate);
Local<ObjectTemplate> templ = ObjectTemplate::New(isolate);
templ->SetHandler(
v8::IndexedPropertyHandlerConfiguration(IdentityIndexedPropertyGetter));
LocalContext context;
Local<v8::Object> obj = templ->NewInstance(context.local()).ToLocalChecked();
context->Global()->Set(context.local(), v8_str("obj"), obj).FromJust();
const char* code =
"try {"
" for (var i = 0; i < 100; i++) {"
" var expected = i;"
" var key = i;"
" if (i == 50) {"
" key = 'foobar';"
" expected = undefined;"
" }"
" var v = obj[key];"
" if (v != expected) throw 'Wrong value ' + v + ' at iteration ' + i;"
" }"
" 'PASSED'"
"} catch(e) {"
" e"
"}";
ExpectString(code, "PASSED");
}
THREADED_TEST(IndexedInterceptorGoingMegamorphic) {
v8::Isolate* isolate = CcTest::isolate();
v8::HandleScope scope(isolate);
Local<ObjectTemplate> templ = ObjectTemplate::New(isolate);
templ->SetHandler(
v8::IndexedPropertyHandlerConfiguration(IdentityIndexedPropertyGetter));
LocalContext context;
Local<v8::Object> obj = templ->NewInstance(context.local()).ToLocalChecked();
context->Global()->Set(context.local(), v8_str("obj"), obj).FromJust();
const char* code =
"var original = obj;"
"try {"
" for (var i = 0; i < 100; i++) {"
" var expected = i;"
" if (i == 50) {"
" obj = {50: 'foobar'};"
" expected = 'foobar';"
" }"
" var v = obj[i];"
" if (v != expected) throw 'Wrong value ' + v + ' at iteration ' + i;"
" if (i == 50) obj = original;"
" }"
" 'PASSED'"
"} catch(e) {"
" e"
"}";
ExpectString(code, "PASSED");
}
THREADED_TEST(IndexedInterceptorReceiverTurningSmi) {
v8::Isolate* isolate = CcTest::isolate();
v8::HandleScope scope(isolate);
Local<ObjectTemplate> templ = ObjectTemplate::New(isolate);
templ->SetHandler(
v8::IndexedPropertyHandlerConfiguration(IdentityIndexedPropertyGetter));
LocalContext context;
Local<v8::Object> obj = templ->NewInstance(context.local()).ToLocalChecked();
context->Global()->Set(context.local(), v8_str("obj"), obj).FromJust();
const char* code =
"var original = obj;"
"try {"
" for (var i = 0; i < 100; i++) {"
" var expected = i;"
" if (i == 5) {"
" obj = 239;"
" expected = undefined;"
" }"
" var v = obj[i];"
" if (v != expected) throw 'Wrong value ' + v + ' at iteration ' + i;"
" if (i == 5) obj = original;"
" }"
" 'PASSED'"
"} catch(e) {"
" e"
"}";
ExpectString(code, "PASSED");
}
THREADED_TEST(IndexedInterceptorOnProto) {
v8::Isolate* isolate = CcTest::isolate();
v8::HandleScope scope(isolate);
Local<ObjectTemplate> templ = ObjectTemplate::New(isolate);
templ->SetHandler(
v8::IndexedPropertyHandlerConfiguration(IdentityIndexedPropertyGetter));
LocalContext context;
Local<v8::Object> obj = templ->NewInstance(context.local()).ToLocalChecked();
context->Global()->Set(context.local(), v8_str("obj"), obj).FromJust();
const char* code =
"var o = {__proto__: obj};"
"try {"
" for (var i = 0; i < 100; i++) {"
" var v = o[i];"
" if (v != i) throw 'Wrong value ' + v + ' at iteration ' + i;"
" }"
" 'PASSED'"
"} catch(e) {"
" e"
"}";
ExpectString(code, "PASSED");
}
static void NoBlockGetterX(Local<Name> name,
const v8::PropertyCallbackInfo<v8::Value>&) {}
static void NoBlockGetterI(uint32_t index,
const v8::PropertyCallbackInfo<v8::Value>&) {}
static void PDeleter(Local<Name> name,
const v8::PropertyCallbackInfo<v8::Boolean>& info) {
if (!name->Equals(info.GetIsolate()->GetCurrentContext(), v8_str("foo"))
.FromJust()) {
return; // not intercepted
}
info.GetReturnValue().Set(false); // intercepted, don't delete the property
}
static void IDeleter(uint32_t index,
const v8::PropertyCallbackInfo<v8::Boolean>& info) {
if (index != 2) {
return; // not intercepted
}
info.GetReturnValue().Set(false); // intercepted, don't delete the property
}
THREADED_TEST(Deleter) {
v8::Isolate* isolate = CcTest::isolate();
v8::HandleScope scope(isolate);
v8::Local<v8::ObjectTemplate> obj = ObjectTemplate::New(isolate);
obj->SetHandler(v8::NamedPropertyHandlerConfiguration(NoBlockGetterX, NULL,
NULL, PDeleter, NULL));
obj->SetHandler(v8::IndexedPropertyHandlerConfiguration(
NoBlockGetterI, NULL, NULL, IDeleter, NULL));
LocalContext context;
context->Global()
->Set(context.local(), v8_str("k"),
obj->NewInstance(context.local()).ToLocalChecked())
.FromJust();
CompileRun(
"k.foo = 'foo';"
"k.bar = 'bar';"
"k[2] = 2;"
"k[4] = 4;");
CHECK(v8_compile("delete k.foo")
->Run(context.local())
.ToLocalChecked()
->IsFalse());
CHECK(v8_compile("delete k.bar")
->Run(context.local())
.ToLocalChecked()
->IsTrue());
CHECK(v8_compile("k.foo")
->Run(context.local())
.ToLocalChecked()
->Equals(context.local(), v8_str("foo"))
.FromJust());
CHECK(v8_compile("k.bar")
->Run(context.local())
.ToLocalChecked()
->IsUndefined());
CHECK(v8_compile("delete k[2]")
->Run(context.local())
.ToLocalChecked()
->IsFalse());
CHECK(v8_compile("delete k[4]")
->Run(context.local())
.ToLocalChecked()
->IsTrue());
CHECK(v8_compile("k[2]")
->Run(context.local())
.ToLocalChecked()
->Equals(context.local(), v8_num(2))
.FromJust());
CHECK(
v8_compile("k[4]")->Run(context.local()).ToLocalChecked()->IsUndefined());
}
static void GetK(Local<Name> name,
const v8::PropertyCallbackInfo<v8::Value>& info) {
ApiTestFuzzer::Fuzz();
v8::Local<v8::Context> context = info.GetIsolate()->GetCurrentContext();
if (name->Equals(context, v8_str("foo")).FromJust() ||
name->Equals(context, v8_str("bar")).FromJust() ||
name->Equals(context, v8_str("baz")).FromJust()) {
info.GetReturnValue().SetUndefined();
}
}
static void IndexedGetK(uint32_t index,
const v8::PropertyCallbackInfo<v8::Value>& info) {
ApiTestFuzzer::Fuzz();
if (index == 0 || index == 1) info.GetReturnValue().SetUndefined();
}
static void NamedEnum(const v8::PropertyCallbackInfo<v8::Array>& info) {
ApiTestFuzzer::Fuzz();
v8::Local<v8::Array> result = v8::Array::New(info.GetIsolate(), 3);
v8::Local<v8::Context> context = info.GetIsolate()->GetCurrentContext();
result->Set(context, v8::Integer::New(info.GetIsolate(), 0), v8_str("foo"))
.FromJust();
result->Set(context, v8::Integer::New(info.GetIsolate(), 1), v8_str("bar"))
.FromJust();
result->Set(context, v8::Integer::New(info.GetIsolate(), 2), v8_str("baz"))
.FromJust();
info.GetReturnValue().Set(result);
}
static void IndexedEnum(const v8::PropertyCallbackInfo<v8::Array>& info) {
ApiTestFuzzer::Fuzz();
v8::Local<v8::Array> result = v8::Array::New(info.GetIsolate(), 2);
v8::Local<v8::Context> context = info.GetIsolate()->GetCurrentContext();
result->Set(context, v8::Integer::New(info.GetIsolate(), 0), v8_str("0"))
.FromJust();
result->Set(context, v8::Integer::New(info.GetIsolate(), 1), v8_str("1"))
.FromJust();
info.GetReturnValue().Set(result);
}
THREADED_TEST(Enumerators) {
v8::Isolate* isolate = CcTest::isolate();
v8::HandleScope scope(isolate);
v8::Local<v8::ObjectTemplate> obj = ObjectTemplate::New(isolate);
obj->SetHandler(
v8::NamedPropertyHandlerConfiguration(GetK, NULL, NULL, NULL, NamedEnum));
obj->SetHandler(v8::IndexedPropertyHandlerConfiguration(
IndexedGetK, NULL, NULL, NULL, IndexedEnum));
LocalContext context;
context->Global()
->Set(context.local(), v8_str("k"),
obj->NewInstance(context.local()).ToLocalChecked())
.FromJust();
v8::Local<v8::Array> result =
v8::Local<v8::Array>::Cast(CompileRun("k[10] = 0;"
"k.a = 0;"
"k[5] = 0;"
"k.b = 0;"
"k[4294967294] = 0;"
"k.c = 0;"
"k[4294967295] = 0;"
"k.d = 0;"
"k[140000] = 0;"
"k.e = 0;"
"k[30000000000] = 0;"
"k.f = 0;"
"var result = [];"
"for (var prop in k) {"
" result.push(prop);"
"}"
"result"));
// Check that we get all the property names returned including the
// ones from the enumerators in the right order: indexed properties
// in numerical order, indexed interceptor properties, named
// properties in insertion order, named interceptor properties.
// This order is not mandated by the spec, so this test is just
// documenting our behavior.
CHECK_EQ(17u, result->Length());
// Indexed properties.
CHECK(v8_str("5")
->Equals(context.local(),
result->Get(context.local(), v8::Integer::New(isolate, 0))
.ToLocalChecked())
.FromJust());
CHECK(v8_str("10")
->Equals(context.local(),
result->Get(context.local(), v8::Integer::New(isolate, 1))
.ToLocalChecked())
.FromJust());
CHECK(v8_str("140000")
->Equals(context.local(),
result->Get(context.local(), v8::Integer::New(isolate, 2))
.ToLocalChecked())
.FromJust());
CHECK(v8_str("4294967294")
->Equals(context.local(),
result->Get(context.local(), v8::Integer::New(isolate, 3))
.ToLocalChecked())
.FromJust());
// Indexed Interceptor properties
CHECK(v8_str("0")
->Equals(context.local(),
result->Get(context.local(), v8::Integer::New(isolate, 4))
.ToLocalChecked())
.FromJust());
CHECK(v8_str("1")
->Equals(context.local(),
result->Get(context.local(), v8::Integer::New(isolate, 5))
.ToLocalChecked())
.FromJust());
// Named properties in insertion order.
CHECK(v8_str("a")
->Equals(context.local(),
result->Get(context.local(), v8::Integer::New(isolate, 6))
.ToLocalChecked())
.FromJust());
CHECK(v8_str("b")
->Equals(context.local(),
result->Get(context.local(), v8::Integer::New(isolate, 7))
.ToLocalChecked())
.FromJust());
CHECK(v8_str("c")
->Equals(context.local(),
result->Get(context.local(), v8::Integer::New(isolate, 8))
.ToLocalChecked())
.FromJust());
CHECK(v8_str("4294967295")
->Equals(context.local(),
result->Get(context.local(), v8::Integer::New(isolate, 9))
.ToLocalChecked())
.FromJust());
CHECK(v8_str("d")
->Equals(context.local(),
result->Get(context.local(), v8::Integer::New(isolate, 10))
.ToLocalChecked())
.FromJust());
CHECK(v8_str("e")
->Equals(context.local(),
result->Get(context.local(), v8::Integer::New(isolate, 11))
.ToLocalChecked())
.FromJust());
CHECK(v8_str("30000000000")
->Equals(context.local(),
result->Get(context.local(), v8::Integer::New(isolate, 12))
.ToLocalChecked())
.FromJust());
CHECK(v8_str("f")
->Equals(context.local(),
result->Get(context.local(), v8::Integer::New(isolate, 13))
.ToLocalChecked())
.FromJust());
// Named interceptor properties.
CHECK(v8_str("foo")
->Equals(context.local(),
result->Get(context.local(), v8::Integer::New(isolate, 14))
.ToLocalChecked())
.FromJust());
CHECK(v8_str("bar")
->Equals(context.local(),
result->Get(context.local(), v8::Integer::New(isolate, 15))
.ToLocalChecked())
.FromJust());
CHECK(v8_str("baz")
->Equals(context.local(),
result->Get(context.local(), v8::Integer::New(isolate, 16))
.ToLocalChecked())
.FromJust());
}
v8::Local<Value> call_ic_function;
v8::Local<Value> call_ic_function2;
v8::Local<Value> call_ic_function3;
static void InterceptorCallICGetter(
Local<Name> name, const v8::PropertyCallbackInfo<v8::Value>& info) {
ApiTestFuzzer::Fuzz();
CHECK(v8_str("x")
->Equals(info.GetIsolate()->GetCurrentContext(), name)
.FromJust());
info.GetReturnValue().Set(call_ic_function);
}
// This test should hit the call IC for the interceptor case.
THREADED_TEST(InterceptorCallIC) {
v8::Isolate* isolate = CcTest::isolate();
v8::HandleScope scope(isolate);
v8::Local<v8::ObjectTemplate> templ = ObjectTemplate::New(isolate);
templ->SetHandler(
v8::NamedPropertyHandlerConfiguration(InterceptorCallICGetter));
LocalContext context;
context->Global()
->Set(context.local(), v8_str("o"),
templ->NewInstance(context.local()).ToLocalChecked())
.FromJust();
call_ic_function = v8_compile("function f(x) { return x + 1; }; f")
->Run(context.local())
.ToLocalChecked();
v8::Local<Value> value = CompileRun(
"var result = 0;"
"for (var i = 0; i < 1000; i++) {"
" result = o.x(41);"
"}");
CHECK_EQ(42, value->Int32Value(context.local()).FromJust());
}
// This test checks that if interceptor doesn't provide
// a value, we can fetch regular value.
THREADED_TEST(InterceptorCallICSeesOthers) {
v8::Isolate* isolate = CcTest::isolate();
v8::HandleScope scope(isolate);
v8::Local<v8::ObjectTemplate> templ = ObjectTemplate::New(isolate);
templ->SetHandler(v8::NamedPropertyHandlerConfiguration(NoBlockGetterX));
LocalContext context;
context->Global()
->Set(context.local(), v8_str("o"),
templ->NewInstance(context.local()).ToLocalChecked())
.FromJust();
v8::Local<Value> value = CompileRun(
"o.x = function f(x) { return x + 1; };"
"var result = 0;"
"for (var i = 0; i < 7; i++) {"
" result = o.x(41);"
"}");
CHECK_EQ(42, value->Int32Value(context.local()).FromJust());
}
static v8::Local<Value> call_ic_function4;
static void InterceptorCallICGetter4(
Local<Name> name, const v8::PropertyCallbackInfo<v8::Value>& info) {
ApiTestFuzzer::Fuzz();
CHECK(v8_str("x")
->Equals(info.GetIsolate()->GetCurrentContext(), name)
.FromJust());
info.GetReturnValue().Set(call_ic_function4);
}
// This test checks that if interceptor provides a function,
// even if we cached shadowed variant, interceptor's function
// is invoked
THREADED_TEST(InterceptorCallICCacheableNotNeeded) {
v8::Isolate* isolate = CcTest::isolate();
v8::HandleScope scope(isolate);
v8::Local<v8::ObjectTemplate> templ = ObjectTemplate::New(isolate);
templ->SetHandler(
v8::NamedPropertyHandlerConfiguration(InterceptorCallICGetter4));
LocalContext context;
context->Global()
->Set(context.local(), v8_str("o"),
templ->NewInstance(context.local()).ToLocalChecked())
.FromJust();
call_ic_function4 = v8_compile("function f(x) { return x - 1; }; f")
->Run(context.local())
.ToLocalChecked();
v8::Local<Value> value = CompileRun(
"Object.getPrototypeOf(o).x = function(x) { return x + 1; };"
"var result = 0;"
"for (var i = 0; i < 1000; i++) {"
" result = o.x(42);"
"}");
CHECK_EQ(41, value->Int32Value(context.local()).FromJust());
}
// Test the case when we stored cacheable lookup into
// a stub, but it got invalidated later on
THREADED_TEST(InterceptorCallICInvalidatedCacheable) {
v8::Isolate* isolate = CcTest::isolate();
v8::HandleScope scope(isolate);
v8::Local<v8::ObjectTemplate> templ = ObjectTemplate::New(isolate);
templ->SetHandler(v8::NamedPropertyHandlerConfiguration(NoBlockGetterX));
LocalContext context;
context->Global()
->Set(context.local(), v8_str("o"),
templ->NewInstance(context.local()).ToLocalChecked())
.FromJust();
v8::Local<Value> value = CompileRun(
"proto1 = new Object();"
"proto2 = new Object();"
"o.__proto__ = proto1;"
"proto1.__proto__ = proto2;"
"proto2.y = function(x) { return x + 1; };"
// Invoke it many times to compile a stub
"for (var i = 0; i < 7; i++) {"
" o.y(42);"
"}"
"proto1.y = function(x) { return x - 1; };"
"var result = 0;"
"for (var i = 0; i < 7; i++) {"
" result += o.y(42);"
"}");
CHECK_EQ(41 * 7, value->Int32Value(context.local()).FromJust());
}
// This test checks that if interceptor doesn't provide a function,
// cached constant function is used
THREADED_TEST(InterceptorCallICConstantFunctionUsed) {
v8::Isolate* isolate = CcTest::isolate();
v8::HandleScope scope(isolate);
v8::Local<v8::ObjectTemplate> templ = ObjectTemplate::New(isolate);
templ->SetHandler(v8::NamedPropertyHandlerConfiguration(NoBlockGetterX));
LocalContext context;
context->Global()
->Set(context.local(), v8_str("o"),
templ->NewInstance(context.local()).ToLocalChecked())
.FromJust();
v8::Local<Value> value = CompileRun(
"function inc(x) { return x + 1; };"
"inc(1);"
"o.x = inc;"
"var result = 0;"
"for (var i = 0; i < 1000; i++) {"
" result = o.x(42);"
"}");
CHECK_EQ(43, value->Int32Value(context.local()).FromJust());
}
static v8::Local<Value> call_ic_function5;
static void InterceptorCallICGetter5(
Local<Name> name, const v8::PropertyCallbackInfo<v8::Value>& info) {
ApiTestFuzzer::Fuzz();
if (v8_str("x")
->Equals(info.GetIsolate()->GetCurrentContext(), name)
.FromJust())
info.GetReturnValue().Set(call_ic_function5);
}
// This test checks that if interceptor provides a function,
// even if we cached constant function, interceptor's function
// is invoked
THREADED_TEST(InterceptorCallICConstantFunctionNotNeeded) {
v8::Isolate* isolate = CcTest::isolate();
v8::HandleScope scope(isolate);
v8::Local<v8::ObjectTemplate> templ = ObjectTemplate::New(isolate);
templ->SetHandler(
v8::NamedPropertyHandlerConfiguration(InterceptorCallICGetter5));
LocalContext context;
context->Global()
->Set(context.local(), v8_str("o"),
templ->NewInstance(context.local()).ToLocalChecked())
.FromJust();
call_ic_function5 = v8_compile("function f(x) { return x - 1; }; f")
->Run(context.local())
.ToLocalChecked();
v8::Local<Value> value = CompileRun(
"function inc(x) { return x + 1; };"
"inc(1);"
"o.x = inc;"
"var result = 0;"
"for (var i = 0; i < 1000; i++) {"
" result = o.x(42);"
"}");
CHECK_EQ(41, value->Int32Value(context.local()).FromJust());
}
static v8::Local<Value> call_ic_function6;
static void InterceptorCallICGetter6(
Local<Name> name, const v8::PropertyCallbackInfo<v8::Value>& info) {
ApiTestFuzzer::Fuzz();
if (v8_str("x")
->Equals(info.GetIsolate()->GetCurrentContext(), name)
.FromJust())
info.GetReturnValue().Set(call_ic_function6);
}
// Same test as above, except the code is wrapped in a function
// to test the optimized compiler.
THREADED_TEST(InterceptorCallICConstantFunctionNotNeededWrapped) {
i::FLAG_allow_natives_syntax = true;
v8::Isolate* isolate = CcTest::isolate();
v8::HandleScope scope(isolate);
v8::Local<v8::ObjectTemplate> templ = ObjectTemplate::New(isolate);
templ->SetHandler(
v8::NamedPropertyHandlerConfiguration(InterceptorCallICGetter6));
LocalContext context;
context->Global()
->Set(context.local(), v8_str("o"),
templ->NewInstance(context.local()).ToLocalChecked())
.FromJust();
call_ic_function6 = v8_compile("function f(x) { return x - 1; }; f")
->Run(context.local())
.ToLocalChecked();
v8::Local<Value> value = CompileRun(
"function inc(x) { return x + 1; };"
"inc(1);"
"o.x = inc;"
"function test() {"
" var result = 0;"
" for (var i = 0; i < 1000; i++) {"
" result = o.x(42);"
" }"
" return result;"
"};"
"test();"
"test();"
"test();"
"%OptimizeFunctionOnNextCall(test);"
"test()");
CHECK_EQ(41, value->Int32Value(context.local()).FromJust());
}
// Test the case when we stored constant function into
// a stub, but it got invalidated later on
THREADED_TEST(InterceptorCallICInvalidatedConstantFunction) {
v8::Isolate* isolate = CcTest::isolate();
v8::HandleScope scope(isolate);
v8::Local<v8::ObjectTemplate> templ = ObjectTemplate::New(isolate);
templ->SetHandler(v8::NamedPropertyHandlerConfiguration(NoBlockGetterX));
LocalContext context;
context->Global()
->Set(context.local(), v8_str("o"),
templ->NewInstance(context.local()).ToLocalChecked())
.FromJust();
v8::Local<Value> value = CompileRun(
"function inc(x) { return x + 1; };"
"inc(1);"
"proto1 = new Object();"
"proto2 = new Object();"
"o.__proto__ = proto1;"
"proto1.__proto__ = proto2;"
"proto2.y = inc;"
// Invoke it many times to compile a stub
"for (var i = 0; i < 7; i++) {"
" o.y(42);"
"}"
"proto1.y = function(x) { return x - 1; };"
"var result = 0;"
"for (var i = 0; i < 7; i++) {"
" result += o.y(42);"
"}");
CHECK_EQ(41 * 7, value->Int32Value(context.local()).FromJust());
}
// Test the case when we stored constant function into
// a stub, but it got invalidated later on due to override on
// global object which is between interceptor and constant function' holders.
THREADED_TEST(InterceptorCallICInvalidatedConstantFunctionViaGlobal) {
v8::Isolate* isolate = CcTest::isolate();
v8::HandleScope scope(isolate);
v8::Local<v8::ObjectTemplate> templ = ObjectTemplate::New(isolate);
templ->SetHandler(v8::NamedPropertyHandlerConfiguration(NoBlockGetterX));
LocalContext context;
context->Global()
->Set(context.local(), v8_str("o"),
templ->NewInstance(context.local()).ToLocalChecked())
.FromJust();
v8::Local<Value> value = CompileRun(
"function inc(x) { return x + 1; };"
"inc(1);"
"o.__proto__ = this;"
"this.__proto__.y = inc;"
// Invoke it many times to compile a stub
"for (var i = 0; i < 7; i++) {"
" if (o.y(42) != 43) throw 'oops: ' + o.y(42);"
"}"
"this.y = function(x) { return x - 1; };"
"var result = 0;"
"for (var i = 0; i < 7; i++) {"
" result += o.y(42);"
"}");
CHECK_EQ(41 * 7, value->Int32Value(context.local()).FromJust());
}
// Test the case when actual function to call sits on global object.
THREADED_TEST(InterceptorCallICCachedFromGlobal) {
v8::Isolate* isolate = CcTest::isolate();
v8::HandleScope scope(isolate);
v8::Local<v8::ObjectTemplate> templ_o = ObjectTemplate::New(isolate);
templ_o->SetHandler(v8::NamedPropertyHandlerConfiguration(NoBlockGetterX));
LocalContext context;
context->Global()
->Set(context.local(), v8_str("o"),
templ_o->NewInstance(context.local()).ToLocalChecked())
.FromJust();
v8::Local<Value> value = CompileRun(
"try {"
" o.__proto__ = this;"
" for (var i = 0; i < 10; i++) {"
" var v = o.parseFloat('239');"
" if (v != 239) throw v;"
// Now it should be ICed and keep a reference to parseFloat.
" }"
" var result = 0;"
" for (var i = 0; i < 10; i++) {"
" result += o.parseFloat('239');"
" }"
" result"
"} catch(e) {"
" e"
"};");
CHECK_EQ(239 * 10, value->Int32Value(context.local()).FromJust());
}
v8::Local<Value> keyed_call_ic_function;
static void InterceptorKeyedCallICGetter(
Local<Name> name, const v8::PropertyCallbackInfo<v8::Value>& info) {
ApiTestFuzzer::Fuzz();
if (v8_str("x")
->Equals(info.GetIsolate()->GetCurrentContext(), name)
.FromJust()) {
info.GetReturnValue().Set(keyed_call_ic_function);
}
}
// Test the case when we stored cacheable lookup into
// a stub, but the function name changed (to another cacheable function).
THREADED_TEST(InterceptorKeyedCallICKeyChange1) {
v8::Isolate* isolate = CcTest::isolate();
v8::HandleScope scope(isolate);
v8::Local<v8::ObjectTemplate> templ = ObjectTemplate::New(isolate);
templ->SetHandler(v8::NamedPropertyHandlerConfiguration(NoBlockGetterX));
LocalContext context;
context->Global()
->Set(context.local(), v8_str("o"),
templ->NewInstance(context.local()).ToLocalChecked())
.FromJust();
CompileRun(
"proto = new Object();"
"proto.y = function(x) { return x + 1; };"
"proto.z = function(x) { return x - 1; };"
"o.__proto__ = proto;"
"var result = 0;"
"var method = 'y';"
"for (var i = 0; i < 10; i++) {"
" if (i == 5) { method = 'z'; };"
" result += o[method](41);"
"}");
CHECK_EQ(42 * 5 + 40 * 5, context->Global()
->Get(context.local(), v8_str("result"))
.ToLocalChecked()
->Int32Value(context.local())
.FromJust());
}
// Test the case when we stored cacheable lookup into
// a stub, but the function name changed (and the new function is present
// both before and after the interceptor in the prototype chain).
THREADED_TEST(InterceptorKeyedCallICKeyChange2) {
v8::Isolate* isolate = CcTest::isolate();
v8::HandleScope scope(isolate);
v8::Local<v8::ObjectTemplate> templ = ObjectTemplate::New(isolate);
templ->SetHandler(
v8::NamedPropertyHandlerConfiguration(InterceptorKeyedCallICGetter));
LocalContext context;
context->Global()
->Set(context.local(), v8_str("proto1"),
templ->NewInstance(context.local()).ToLocalChecked())
.FromJust();
keyed_call_ic_function = v8_compile("function f(x) { return x - 1; }; f")
->Run(context.local())
.ToLocalChecked();
CompileRun(
"o = new Object();"
"proto2 = new Object();"
"o.y = function(x) { return x + 1; };"
"proto2.y = function(x) { return x + 2; };"
"o.__proto__ = proto1;"
"proto1.__proto__ = proto2;"
"var result = 0;"
"var method = 'x';"
"for (var i = 0; i < 10; i++) {"
" if (i == 5) { method = 'y'; };"
" result += o[method](41);"
"}");
CHECK_EQ(42 * 5 + 40 * 5, context->Global()
->Get(context.local(), v8_str("result"))
.ToLocalChecked()
->Int32Value(context.local())
.FromJust());
}
// Same as InterceptorKeyedCallICKeyChange1 only the cacheable function sit
// on the global object.
THREADED_TEST(InterceptorKeyedCallICKeyChangeOnGlobal) {
v8::Isolate* isolate = CcTest::isolate();
v8::HandleScope scope(isolate);
v8::Local<v8::ObjectTemplate> templ = ObjectTemplate::New(isolate);
templ->SetHandler(v8::NamedPropertyHandlerConfiguration(NoBlockGetterX));
LocalContext context;
context->Global()
->Set(context.local(), v8_str("o"),
templ->NewInstance(context.local()).ToLocalChecked())
.FromJust();
CompileRun(
"function inc(x) { return x + 1; };"
"inc(1);"
"function dec(x) { return x - 1; };"
"dec(1);"
"o.__proto__ = this;"
"this.__proto__.x = inc;"
"this.__proto__.y = dec;"
"var result = 0;"
"var method = 'x';"
"for (var i = 0; i < 10; i++) {"
" if (i == 5) { method = 'y'; };"
" result += o[method](41);"
"}");
CHECK_EQ(42 * 5 + 40 * 5, context->Global()
->Get(context.local(), v8_str("result"))
.ToLocalChecked()
->Int32Value(context.local())
.FromJust());
}
// Test the case when actual function to call sits on global object.
THREADED_TEST(InterceptorKeyedCallICFromGlobal) {
v8::Isolate* isolate = CcTest::isolate();
v8::HandleScope scope(isolate);
v8::Local<v8::ObjectTemplate> templ_o = ObjectTemplate::New(isolate);
templ_o->SetHandler(v8::NamedPropertyHandlerConfiguration(NoBlockGetterX));
LocalContext context;
context->Global()
->Set(context.local(), v8_str("o"),
templ_o->NewInstance(context.local()).ToLocalChecked())
.FromJust();
CompileRun(
"function len(x) { return x.length; };"
"o.__proto__ = this;"
"var m = 'parseFloat';"
"var result = 0;"
"for (var i = 0; i < 10; i++) {"
" if (i == 5) {"
" m = 'len';"
" saved_result = result;"
" };"
" result = o[m]('239');"
"}");
CHECK_EQ(3, context->Global()
->Get(context.local(), v8_str("result"))
.ToLocalChecked()
->Int32Value(context.local())
.FromJust());
CHECK_EQ(239, context->Global()
->Get(context.local(), v8_str("saved_result"))
.ToLocalChecked()
->Int32Value(context.local())
.FromJust());
}
// Test the map transition before the interceptor.
THREADED_TEST(InterceptorKeyedCallICMapChangeBefore) {
v8::Isolate* isolate = CcTest::isolate();
v8::HandleScope scope(isolate);
v8::Local<v8::ObjectTemplate> templ_o = ObjectTemplate::New(isolate);
templ_o->SetHandler(v8::NamedPropertyHandlerConfiguration(NoBlockGetterX));
LocalContext context;
context->Global()
->Set(context.local(), v8_str("proto"),
templ_o->NewInstance(context.local()).ToLocalChecked())
.FromJust();
CompileRun(
"var o = new Object();"
"o.__proto__ = proto;"
"o.method = function(x) { return x + 1; };"
"var m = 'method';"
"var result = 0;"
"for (var i = 0; i < 10; i++) {"
" if (i == 5) { o.method = function(x) { return x - 1; }; };"
" result += o[m](41);"
"}");
CHECK_EQ(42 * 5 + 40 * 5, context->Global()
->Get(context.local(), v8_str("result"))
.ToLocalChecked()
->Int32Value(context.local())
.FromJust());
}
// Test the map transition after the interceptor.
THREADED_TEST(InterceptorKeyedCallICMapChangeAfter) {
v8::Isolate* isolate = CcTest::isolate();
v8::HandleScope scope(isolate);
v8::Local<v8::ObjectTemplate> templ_o = ObjectTemplate::New(isolate);
templ_o->SetHandler(v8::NamedPropertyHandlerConfiguration(NoBlockGetterX));
LocalContext context;
context->Global()
->Set(context.local(), v8_str("o"),
templ_o->NewInstance(context.local()).ToLocalChecked())
.FromJust();
CompileRun(
"var proto = new Object();"
"o.__proto__ = proto;"
"proto.method = function(x) { return x + 1; };"
"var m = 'method';"
"var result = 0;"
"for (var i = 0; i < 10; i++) {"
" if (i == 5) { proto.method = function(x) { return x - 1; }; };"
" result += o[m](41);"
"}");
CHECK_EQ(42 * 5 + 40 * 5, context->Global()
->Get(context.local(), v8_str("result"))
.ToLocalChecked()
->Int32Value(context.local())
.FromJust());
}
static int interceptor_call_count = 0;
static void InterceptorICRefErrorGetter(
Local<Name> name, const v8::PropertyCallbackInfo<v8::Value>& info) {
ApiTestFuzzer::Fuzz();
if (!is_bootstrapping &&
v8_str("x")
->Equals(info.GetIsolate()->GetCurrentContext(), name)
.FromJust() &&
interceptor_call_count++ < 20) {
info.GetReturnValue().Set(call_ic_function2);
}
}
// This test should hit load and call ICs for the interceptor case.
// Once in a while, the interceptor will reply that a property was not
// found in which case we should get a reference error.
THREADED_TEST(InterceptorICReferenceErrors) {
v8::Isolate* isolate = CcTest::isolate();
v8::HandleScope scope(isolate);
v8::Local<v8::ObjectTemplate> templ = ObjectTemplate::New(isolate);
templ->SetHandler(
v8::NamedPropertyHandlerConfiguration(InterceptorICRefErrorGetter));
is_bootstrapping = true;
LocalContext context(0, templ, v8::Local<Value>());
is_bootstrapping = false;
call_ic_function2 = v8_compile("function h(x) { return x; }; h")
->Run(context.local())
.ToLocalChecked();
v8::Local<Value> value = CompileRun(
"function f() {"
" for (var i = 0; i < 1000; i++) {"
" try { x; } catch(e) { return true; }"
" }"
" return false;"
"};"
"f();");
CHECK_EQ(true, value->BooleanValue(context.local()).FromJust());
interceptor_call_count = 0;
value = CompileRun(
"function g() {"
" for (var i = 0; i < 1000; i++) {"
" try { x(42); } catch(e) { return true; }"
" }"
" return false;"
"};"
"g();");
CHECK_EQ(true, value->BooleanValue(context.local()).FromJust());
}
static int interceptor_ic_exception_get_count = 0;
static void InterceptorICExceptionGetter(
Local<Name> name, const v8::PropertyCallbackInfo<v8::Value>& info) {
ApiTestFuzzer::Fuzz();
if (is_bootstrapping) return;
if (v8_str("x")
->Equals(info.GetIsolate()->GetCurrentContext(), name)
.FromJust() &&
++interceptor_ic_exception_get_count < 20) {
info.GetReturnValue().Set(call_ic_function3);
}
if (interceptor_ic_exception_get_count == 20) {
info.GetIsolate()->ThrowException(v8_num(42));
return;
}
}
// Test interceptor load/call IC where the interceptor throws an
// exception once in a while.
THREADED_TEST(InterceptorICGetterExceptions) {
interceptor_ic_exception_get_count = 0;
v8::Isolate* isolate = CcTest::isolate();
v8::HandleScope scope(isolate);
v8::Local<v8::ObjectTemplate> templ = ObjectTemplate::New(isolate);
templ->SetHandler(
v8::NamedPropertyHandlerConfiguration(InterceptorICExceptionGetter));
is_bootstrapping = true;
LocalContext context(0, templ, v8::Local<Value>());
is_bootstrapping = false;
call_ic_function3 = v8_compile("function h(x) { return x; }; h")
->Run(context.local())
.ToLocalChecked();
v8::Local<Value> value = CompileRun(
"function f() {"
" for (var i = 0; i < 100; i++) {"
" try { x; } catch(e) { return true; }"
" }"
" return false;"
"};"
"f();");
CHECK_EQ(true, value->BooleanValue(context.local()).FromJust());
interceptor_ic_exception_get_count = 0;
value = CompileRun(
"function f() {"
" for (var i = 0; i < 100; i++) {"
" try { x(42); } catch(e) { return true; }"
" }"
" return false;"
"};"
"f();");
CHECK_EQ(true, value->BooleanValue(context.local()).FromJust());
}
static int interceptor_ic_exception_set_count = 0;
static void InterceptorICExceptionSetter(
Local<Name> key, Local<Value> value,
const v8::PropertyCallbackInfo<v8::Value>& info) {
ApiTestFuzzer::Fuzz();
if (++interceptor_ic_exception_set_count > 20) {
info.GetIsolate()->ThrowException(v8_num(42));
}
}
// Test interceptor store IC where the interceptor throws an exception
// once in a while.
THREADED_TEST(InterceptorICSetterExceptions) {
interceptor_ic_exception_set_count = 0;
v8::Isolate* isolate = CcTest::isolate();
v8::HandleScope scope(isolate);
v8::Local<v8::ObjectTemplate> templ = ObjectTemplate::New(isolate);
templ->SetHandler(
v8::NamedPropertyHandlerConfiguration(0, InterceptorICExceptionSetter));
LocalContext context(0, templ, v8::Local<Value>());
v8::Local<Value> value = CompileRun(
"function f() {"
" for (var i = 0; i < 100; i++) {"
" try { x = 42; } catch(e) { return true; }"
" }"
" return false;"
"};"
"f();");
CHECK_EQ(true, value->BooleanValue(context.local()).FromJust());
}
// Test that we ignore null interceptors.
THREADED_TEST(NullNamedInterceptor) {
v8::Isolate* isolate = CcTest::isolate();
v8::HandleScope scope(isolate);
v8::Local<v8::ObjectTemplate> templ = ObjectTemplate::New(isolate);
templ->SetHandler(v8::NamedPropertyHandlerConfiguration(
static_cast<v8::GenericNamedPropertyGetterCallback>(0)));
LocalContext context;
templ->Set(CcTest::isolate(), "x", v8_num(42));
v8::Local<v8::Object> obj =
templ->NewInstance(context.local()).ToLocalChecked();
context->Global()->Set(context.local(), v8_str("obj"), obj).FromJust();
v8::Local<Value> value = CompileRun("obj.x");
CHECK(value->IsInt32());
CHECK_EQ(42, value->Int32Value(context.local()).FromJust());
}
// Test that we ignore null interceptors.
THREADED_TEST(NullIndexedInterceptor) {
v8::Isolate* isolate = CcTest::isolate();
v8::HandleScope scope(isolate);
v8::Local<v8::ObjectTemplate> templ = ObjectTemplate::New(isolate);
templ->SetHandler(v8::IndexedPropertyHandlerConfiguration(
static_cast<v8::IndexedPropertyGetterCallback>(0)));
LocalContext context;
templ->Set(CcTest::isolate(), "42", v8_num(42));
v8::Local<v8::Object> obj =
templ->NewInstance(context.local()).ToLocalChecked();
context->Global()->Set(context.local(), v8_str("obj"), obj).FromJust();
v8::Local<Value> value = CompileRun("obj[42]");
CHECK(value->IsInt32());
CHECK_EQ(42, value->Int32Value(context.local()).FromJust());
}
THREADED_TEST(NamedPropertyHandlerGetterAttributes) {
v8::Isolate* isolate = CcTest::isolate();
v8::HandleScope scope(isolate);
v8::Local<v8::FunctionTemplate> templ = v8::FunctionTemplate::New(isolate);
templ->InstanceTemplate()->SetHandler(
v8::NamedPropertyHandlerConfiguration(InterceptorLoadXICGetter));
LocalContext env;
env->Global()
->Set(env.local(), v8_str("obj"), templ->GetFunction(env.local())
.ToLocalChecked()
->NewInstance(env.local())
.ToLocalChecked())
.FromJust();
ExpectTrue("obj.x === 42");
ExpectTrue("!obj.propertyIsEnumerable('x')");
}
THREADED_TEST(Regress256330) {
i::FLAG_allow_natives_syntax = true;
LocalContext context;
v8::HandleScope scope(context->GetIsolate());
Local<FunctionTemplate> templ = FunctionTemplate::New(context->GetIsolate());
AddInterceptor(templ, InterceptorGetter, InterceptorSetter);
context->Global()
->Set(context.local(), v8_str("Bug"),
templ->GetFunction(context.local()).ToLocalChecked())
.FromJust();
CompileRun(
"\"use strict\"; var o = new Bug;"
"function f(o) { o.x = 10; };"
"f(o); f(o); f(o);"
"%OptimizeFunctionOnNextCall(f);"
"f(o);");
ExpectBoolean("%GetOptimizationStatus(f) != 2", true);
}
THREADED_TEST(CrankshaftInterceptorSetter) {
i::FLAG_allow_natives_syntax = true;
v8::HandleScope scope(CcTest::isolate());
Local<FunctionTemplate> templ = FunctionTemplate::New(CcTest::isolate());
AddInterceptor(templ, InterceptorGetter, InterceptorSetter);
LocalContext env;
env->Global()
->Set(env.local(), v8_str("Obj"),
templ->GetFunction(env.local()).ToLocalChecked())
.FromJust();
CompileRun(
"var obj = new Obj;"
// Initialize fields to avoid transitions later.
"obj.age = 0;"
"obj.accessor_age = 42;"
"function setter(i) { this.accessor_age = i; };"
"function getter() { return this.accessor_age; };"
"function setAge(i) { obj.age = i; };"
"Object.defineProperty(obj, 'age', { get:getter, set:setter });"
"setAge(1);"
"setAge(2);"
"setAge(3);"
"%OptimizeFunctionOnNextCall(setAge);"
"setAge(4);");
// All stores went through the interceptor.
ExpectInt32("obj.interceptor_age", 4);
ExpectInt32("obj.accessor_age", 42);
}
THREADED_TEST(CrankshaftInterceptorGetter) {
i::FLAG_allow_natives_syntax = true;
v8::HandleScope scope(CcTest::isolate());
Local<FunctionTemplate> templ = FunctionTemplate::New(CcTest::isolate());
AddInterceptor(templ, InterceptorGetter, InterceptorSetter);
LocalContext env;
env->Global()
->Set(env.local(), v8_str("Obj"),
templ->GetFunction(env.local()).ToLocalChecked())
.FromJust();
CompileRun(
"var obj = new Obj;"
// Initialize fields to avoid transitions later.
"obj.age = 1;"
"obj.accessor_age = 42;"
"function getter() { return this.accessor_age; };"
"function getAge() { return obj.interceptor_age; };"
"Object.defineProperty(obj, 'interceptor_age', { get:getter });"
"getAge();"
"getAge();"
"getAge();"
"%OptimizeFunctionOnNextCall(getAge);");
// Access through interceptor.
ExpectInt32("getAge()", 1);
}
THREADED_TEST(CrankshaftInterceptorFieldRead) {
i::FLAG_allow_natives_syntax = true;
v8::HandleScope scope(CcTest::isolate());
Local<FunctionTemplate> templ = FunctionTemplate::New(CcTest::isolate());
AddInterceptor(templ, InterceptorGetter, InterceptorSetter);
LocalContext env;
env->Global()
->Set(env.local(), v8_str("Obj"),
templ->GetFunction(env.local()).ToLocalChecked())
.FromJust();
CompileRun(
"var obj = new Obj;"
"obj.__proto__.interceptor_age = 42;"
"obj.age = 100;"
"function getAge() { return obj.interceptor_age; };");
ExpectInt32("getAge();", 100);
ExpectInt32("getAge();", 100);
ExpectInt32("getAge();", 100);
CompileRun("%OptimizeFunctionOnNextCall(getAge);");
// Access through interceptor.
ExpectInt32("getAge();", 100);
}
THREADED_TEST(CrankshaftInterceptorFieldWrite) {
i::FLAG_allow_natives_syntax = true;
v8::HandleScope scope(CcTest::isolate());
Local<FunctionTemplate> templ = FunctionTemplate::New(CcTest::isolate());
AddInterceptor(templ, InterceptorGetter, InterceptorSetter);
LocalContext env;
env->Global()
->Set(env.local(), v8_str("Obj"),
templ->GetFunction(env.local()).ToLocalChecked())
.FromJust();
CompileRun(
"var obj = new Obj;"
"obj.age = 100000;"
"function setAge(i) { obj.age = i };"
"setAge(100);"
"setAge(101);"
"setAge(102);"
"%OptimizeFunctionOnNextCall(setAge);"
"setAge(103);");
ExpectInt32("obj.age", 100000);
ExpectInt32("obj.interceptor_age", 103);
}
THREADED_TEST(Regress149912) {
LocalContext context;
v8::HandleScope scope(context->GetIsolate());
Local<FunctionTemplate> templ = FunctionTemplate::New(context->GetIsolate());
AddInterceptor(templ, EmptyInterceptorGetter, EmptyInterceptorSetter);
context->Global()
->Set(context.local(), v8_str("Bug"),
templ->GetFunction(context.local()).ToLocalChecked())
.FromJust();
CompileRun("Number.prototype.__proto__ = new Bug; var x = 0; x.foo();");
}
THREADED_TEST(Regress625155) {
LocalContext context;
v8::HandleScope scope(context->GetIsolate());
Local<FunctionTemplate> templ = FunctionTemplate::New(context->GetIsolate());
AddInterceptor(templ, EmptyInterceptorGetter, EmptyInterceptorSetter);
context->Global()
->Set(context.local(), v8_str("Bug"),
templ->GetFunction(context.local()).ToLocalChecked())
.FromJust();
CompileRun(
"Number.prototype.__proto__ = new Bug;"
"var x;"
"x = 0xdead;"
"x.boom = 0;"
"x = 's';"
"x.boom = 0;"
"x = 1.5;"
"x.boom = 0;");
}
THREADED_TEST(Regress125988) {
v8::HandleScope scope(CcTest::isolate());
Local<FunctionTemplate> intercept = FunctionTemplate::New(CcTest::isolate());
AddInterceptor(intercept, EmptyInterceptorGetter, EmptyInterceptorSetter);
LocalContext env;
env->Global()
->Set(env.local(), v8_str("Intercept"),
intercept->GetFunction(env.local()).ToLocalChecked())
.FromJust();
CompileRun(
"var a = new Object();"
"var b = new Intercept();"
"var c = new Object();"
"c.__proto__ = b;"
"b.__proto__ = a;"
"a.x = 23;"
"for (var i = 0; i < 3; i++) c.x;");
ExpectBoolean("c.hasOwnProperty('x')", false);
ExpectInt32("c.x", 23);
CompileRun(
"a.y = 42;"
"for (var i = 0; i < 3; i++) c.x;");
ExpectBoolean("c.hasOwnProperty('x')", false);
ExpectInt32("c.x", 23);
ExpectBoolean("c.hasOwnProperty('y')", false);
ExpectInt32("c.y", 42);
}
static void IndexedPropertyEnumerator(
const v8::PropertyCallbackInfo<v8::Array>& info) {
v8::Local<v8::Array> result = v8::Array::New(info.GetIsolate(), 1);
result->Set(info.GetIsolate()->GetCurrentContext(), 0,
v8::Integer::New(info.GetIsolate(), 7))
.FromJust();
info.GetReturnValue().Set(result);
}
static void NamedPropertyEnumerator(
const v8::PropertyCallbackInfo<v8::Array>& info) {
v8::Local<v8::Array> result = v8::Array::New(info.GetIsolate(), 2);
v8::Local<v8::Context> context = info.GetIsolate()->GetCurrentContext();
result->Set(context, 0, v8_str("x")).FromJust();
result->Set(context, 1, v8::Symbol::GetIterator(info.GetIsolate()))
.FromJust();
info.GetReturnValue().Set(result);
}
THREADED_TEST(GetOwnPropertyNamesWithInterceptor) {
v8::Isolate* isolate = CcTest::isolate();
v8::HandleScope handle_scope(isolate);
v8::Local<v8::ObjectTemplate> obj_template = v8::ObjectTemplate::New(isolate);
obj_template->Set(v8_str("7"), v8::Integer::New(CcTest::isolate(), 7));
obj_template->Set(v8_str("x"), v8::Integer::New(CcTest::isolate(), 42));
obj_template->SetHandler(v8::IndexedPropertyHandlerConfiguration(
NULL, NULL, NULL, NULL, IndexedPropertyEnumerator));
obj_template->SetHandler(v8::NamedPropertyHandlerConfiguration(
NULL, NULL, NULL, NULL, NamedPropertyEnumerator));
LocalContext context;
v8::Local<v8::Object> global = context->Global();
global->Set(context.local(), v8_str("object"),
obj_template->NewInstance(context.local()).ToLocalChecked())
.FromJust();
v8::Local<v8::Value> result =
CompileRun("Object.getOwnPropertyNames(object)");
CHECK(result->IsArray());
v8::Local<v8::Array> result_array = v8::Local<v8::Array>::Cast(result);
CHECK_EQ(2u, result_array->Length());
CHECK(result_array->Get(context.local(), 0).ToLocalChecked()->IsString());
CHECK(result_array->Get(context.local(), 1).ToLocalChecked()->IsString());
CHECK(v8_str("7")
->Equals(context.local(),
result_array->Get(context.local(), 0).ToLocalChecked())
.FromJust());
CHECK(v8_str("x")
->Equals(context.local(),
result_array->Get(context.local(), 1).ToLocalChecked())
.FromJust());
result = CompileRun("var ret = []; for (var k in object) ret.push(k); ret");
CHECK(result->IsArray());
result_array = v8::Local<v8::Array>::Cast(result);
CHECK_EQ(2u, result_array->Length());
CHECK(result_array->Get(context.local(), 0).ToLocalChecked()->IsString());
CHECK(result_array->Get(context.local(), 1).ToLocalChecked()->IsString());
CHECK(v8_str("7")
->Equals(context.local(),
result_array->Get(context.local(), 0).ToLocalChecked())
.FromJust());
CHECK(v8_str("x")
->Equals(context.local(),
result_array->Get(context.local(), 1).ToLocalChecked())
.FromJust());
result = CompileRun("Object.getOwnPropertySymbols(object)");
CHECK(result->IsArray());
result_array = v8::Local<v8::Array>::Cast(result);
CHECK_EQ(1u, result_array->Length());
CHECK(result_array->Get(context.local(), 0)
.ToLocalChecked()
->Equals(context.local(), v8::Symbol::GetIterator(isolate))
.FromJust());
}
static void IndexedPropertyEnumeratorException(
const v8::PropertyCallbackInfo<v8::Array>& info) {
info.GetIsolate()->ThrowException(v8_num(42));
}
THREADED_TEST(GetOwnPropertyNamesWithIndexedInterceptorExceptions_regress4026) {
v8::Isolate* isolate = CcTest::isolate();
v8::HandleScope handle_scope(isolate);
v8::Local<v8::ObjectTemplate> obj_template = v8::ObjectTemplate::New(isolate);
obj_template->Set(v8_str("7"), v8::Integer::New(CcTest::isolate(), 7));
obj_template->Set(v8_str("x"), v8::Integer::New(CcTest::isolate(), 42));
// First just try a failing indexed interceptor.
obj_template->SetHandler(v8::IndexedPropertyHandlerConfiguration(
NULL, NULL, NULL, NULL, IndexedPropertyEnumeratorException));
LocalContext context;
v8::Local<v8::Object> global = context->Global();
global->Set(context.local(), v8_str("object"),
obj_template->NewInstance(context.local()).ToLocalChecked())
.FromJust();
v8::Local<v8::Value> result = CompileRun(
"var result = []; "
"try { "
" for (var k in object) result .push(k);"
"} catch (e) {"
" result = e"
"}"
"result ");
CHECK(!result->IsArray());
CHECK(v8_num(42)->Equals(context.local(), result).FromJust());
result = CompileRun(
"var result = [];"
"try { "
" result = Object.keys(object);"
"} catch (e) {"
" result = e;"
"}"
"result");
CHECK(!result->IsArray());
CHECK(v8_num(42)->Equals(context.local(), result).FromJust());
}
static void NamedPropertyEnumeratorException(
const v8::PropertyCallbackInfo<v8::Array>& info) {
info.GetIsolate()->ThrowException(v8_num(43));
}
THREADED_TEST(GetOwnPropertyNamesWithNamedInterceptorExceptions_regress4026) {
v8::Isolate* isolate = CcTest::isolate();
v8::HandleScope handle_scope(isolate);
v8::Local<v8::ObjectTemplate> obj_template = v8::ObjectTemplate::New(isolate);
obj_template->Set(v8_str("7"), v8::Integer::New(CcTest::isolate(), 7));
obj_template->Set(v8_str("x"), v8::Integer::New(CcTest::isolate(), 42));
// First just try a failing indexed interceptor.
obj_template->SetHandler(v8::NamedPropertyHandlerConfiguration(
NULL, NULL, NULL, NULL, NamedPropertyEnumeratorException));
LocalContext context;
v8::Local<v8::Object> global = context->Global();
global->Set(context.local(), v8_str("object"),
obj_template->NewInstance(context.local()).ToLocalChecked())
.FromJust();
v8::Local<v8::Value> result = CompileRun(
"var result = []; "
"try { "
" for (var k in object) result.push(k);"
"} catch (e) {"
" result = e"
"}"
"result");
CHECK(!result->IsArray());
CHECK(v8_num(43)->Equals(context.local(), result).FromJust());
result = CompileRun(
"var result = [];"
"try { "
" result = Object.keys(object);"
"} catch (e) {"
" result = e;"
"}"
"result");
CHECK(!result->IsArray());
CHECK(v8_num(43)->Equals(context.local(), result).FromJust());
}
namespace {
template <typename T>
Local<Object> BuildWrappedObject(v8::Isolate* isolate, T* data) {
auto templ = v8::ObjectTemplate::New(isolate);
templ->SetInternalFieldCount(1);
auto instance =
templ->NewInstance(isolate->GetCurrentContext()).ToLocalChecked();
instance->SetAlignedPointerInInternalField(0, data);
return instance;
}
template <typename T>
T* GetWrappedObject(Local<Value> data) {
return reinterpret_cast<T*>(
Object::Cast(*data)->GetAlignedPointerFromInternalField(0));
}
struct AccessCheckData {
int count;
bool result;
};
AccessCheckData* g_access_check_data = nullptr;
bool SimpleAccessChecker(Local<v8::Context> accessing_context,
Local<v8::Object> access_object,
Local<v8::Value> data) {
g_access_check_data->count++;
return g_access_check_data->result;
}
struct ShouldInterceptData {
int value;
bool should_intercept;
};
void ShouldNamedInterceptor(Local<Name> name,
const v8::PropertyCallbackInfo<Value>& info) {
ApiTestFuzzer::Fuzz();
CheckReturnValue(info, FUNCTION_ADDR(ShouldNamedInterceptor));
auto data = GetWrappedObject<ShouldInterceptData>(info.Data());
if (!data->should_intercept) return;
info.GetReturnValue().Set(v8_num(data->value));
}
void ShouldIndexedInterceptor(uint32_t,
const v8::PropertyCallbackInfo<Value>& info) {
ApiTestFuzzer::Fuzz();
CheckReturnValue(info, FUNCTION_ADDR(ShouldIndexedInterceptor));
auto data = GetWrappedObject<ShouldInterceptData>(info.Data());
if (!data->should_intercept) return;
info.GetReturnValue().Set(v8_num(data->value));
}
} // namespace
TEST(NamedAllCanReadInterceptor) {
auto isolate = CcTest::isolate();
v8::HandleScope handle_scope(isolate);
LocalContext context;
AccessCheckData access_check_data;
access_check_data.result = true;
access_check_data.count = 0;
g_access_check_data = &access_check_data;
ShouldInterceptData intercept_data_0;
intercept_data_0.value = 239;
intercept_data_0.should_intercept = true;
ShouldInterceptData intercept_data_1;
intercept_data_1.value = 165;
intercept_data_1.should_intercept = false;
auto intercepted_0 = v8::ObjectTemplate::New(isolate);
{
v8::NamedPropertyHandlerConfiguration conf(ShouldNamedInterceptor);
conf.flags = v8::PropertyHandlerFlags::kAllCanRead;
conf.data =
BuildWrappedObject<ShouldInterceptData>(isolate, &intercept_data_0);
intercepted_0->SetHandler(conf);
}
auto intercepted_1 = v8::ObjectTemplate::New(isolate);
{
v8::NamedPropertyHandlerConfiguration conf(ShouldNamedInterceptor);
conf.flags = v8::PropertyHandlerFlags::kAllCanRead;
conf.data =
BuildWrappedObject<ShouldInterceptData>(isolate, &intercept_data_1);
intercepted_1->SetHandler(conf);
}
auto checked = v8::ObjectTemplate::New(isolate);
checked->SetAccessCheckCallback(SimpleAccessChecker);
context->Global()
->Set(context.local(), v8_str("intercepted_0"),
intercepted_0->NewInstance(context.local()).ToLocalChecked())
.FromJust();
context->Global()
->Set(context.local(), v8_str("intercepted_1"),
intercepted_1->NewInstance(context.local()).ToLocalChecked())
.FromJust();
auto checked_instance =
checked->NewInstance(context.local()).ToLocalChecked();
checked_instance->Set(context.local(), v8_str("whatever"), v8_num(17))
.FromJust();
context->Global()
->Set(context.local(), v8_str("checked"), checked_instance)
.FromJust();
CompileRun(
"checked.__proto__ = intercepted_1;"
"intercepted_1.__proto__ = intercepted_0;");
CHECK_EQ(3, access_check_data.count);
ExpectInt32("checked.whatever", 17);
CHECK(!CompileRun("Object.getOwnPropertyDescriptor(checked, 'whatever')")
->IsUndefined());
CHECK_EQ(5, access_check_data.count);
access_check_data.result = false;
ExpectInt32("checked.whatever", intercept_data_0.value);
{
v8::TryCatch try_catch(isolate);
CompileRun("Object.getOwnPropertyDescriptor(checked, 'whatever')");
CHECK(try_catch.HasCaught());
}
CHECK_EQ(7, access_check_data.count);
intercept_data_1.should_intercept = true;
ExpectInt32("checked.whatever", intercept_data_1.value);
{
v8::TryCatch try_catch(isolate);
CompileRun("Object.getOwnPropertyDescriptor(checked, 'whatever')");
CHECK(try_catch.HasCaught());
}
CHECK_EQ(9, access_check_data.count);
g_access_check_data = nullptr;
}
TEST(IndexedAllCanReadInterceptor) {
auto isolate = CcTest::isolate();
v8::HandleScope handle_scope(isolate);
LocalContext context;
AccessCheckData access_check_data;
access_check_data.result = true;
access_check_data.count = 0;
g_access_check_data = &access_check_data;
ShouldInterceptData intercept_data_0;
intercept_data_0.value = 239;
intercept_data_0.should_intercept = true;
ShouldInterceptData intercept_data_1;
intercept_data_1.value = 165;
intercept_data_1.should_intercept = false;
auto intercepted_0 = v8::ObjectTemplate::New(isolate);
{
v8::IndexedPropertyHandlerConfiguration conf(ShouldIndexedInterceptor);
conf.flags = v8::PropertyHandlerFlags::kAllCanRead;
conf.data =
BuildWrappedObject<ShouldInterceptData>(isolate, &intercept_data_0);
intercepted_0->SetHandler(conf);
}
auto intercepted_1 = v8::ObjectTemplate::New(isolate);
{
v8::IndexedPropertyHandlerConfiguration conf(ShouldIndexedInterceptor);
conf.flags = v8::PropertyHandlerFlags::kAllCanRead;
conf.data =
BuildWrappedObject<ShouldInterceptData>(isolate, &intercept_data_1);
intercepted_1->SetHandler(conf);
}
auto checked = v8::ObjectTemplate::New(isolate);
checked->SetAccessCheckCallback(SimpleAccessChecker);
context->Global()
->Set(context.local(), v8_str("intercepted_0"),
intercepted_0->NewInstance(context.local()).ToLocalChecked())
.FromJust();
context->Global()
->Set(context.local(), v8_str("intercepted_1"),
intercepted_1->NewInstance(context.local()).ToLocalChecked())
.FromJust();
auto checked_instance =
checked->NewInstance(context.local()).ToLocalChecked();
context->Global()
->Set(context.local(), v8_str("checked"), checked_instance)
.FromJust();
checked_instance->Set(context.local(), 15, v8_num(17)).FromJust();
CompileRun(
"checked.__proto__ = intercepted_1;"
"intercepted_1.__proto__ = intercepted_0;");
CHECK_EQ(3, access_check_data.count);
access_check_data.result = true;
ExpectInt32("checked[15]", 17);
CHECK(!CompileRun("Object.getOwnPropertyDescriptor(checked, '15')")
->IsUndefined());
CHECK_EQ(5, access_check_data.count);
access_check_data.result = false;
ExpectInt32("checked[15]", intercept_data_0.value);
{
v8::TryCatch try_catch(isolate);
CompileRun("Object.getOwnPropertyDescriptor(checked, '15')");
CHECK(try_catch.HasCaught());
}
CHECK_EQ(7, access_check_data.count);
intercept_data_1.should_intercept = true;
ExpectInt32("checked[15]", intercept_data_1.value);
{
v8::TryCatch try_catch(isolate);
CompileRun("Object.getOwnPropertyDescriptor(checked, '15')");
CHECK(try_catch.HasCaught());
}
CHECK_EQ(9, access_check_data.count);
g_access_check_data = nullptr;
}
THREADED_TEST(NonMaskingInterceptorOwnProperty) {
auto isolate = CcTest::isolate();
v8::HandleScope handle_scope(isolate);
LocalContext context;
ShouldInterceptData intercept_data;
intercept_data.value = 239;
intercept_data.should_intercept = true;
auto interceptor_templ = v8::ObjectTemplate::New(isolate);
v8::NamedPropertyHandlerConfiguration conf(ShouldNamedInterceptor);
conf.flags = v8::PropertyHandlerFlags::kNonMasking;
conf.data = BuildWrappedObject<ShouldInterceptData>(isolate, &intercept_data);
interceptor_templ->SetHandler(conf);
auto interceptor =
interceptor_templ->NewInstance(context.local()).ToLocalChecked();
context->Global()
->Set(context.local(), v8_str("obj"), interceptor)
.FromJust();
ExpectInt32("obj.whatever", 239);
CompileRun("obj.whatever = 4;");
ExpectInt32("obj.whatever", 4);
CompileRun("delete obj.whatever;");
ExpectInt32("obj.whatever", 239);
}
THREADED_TEST(NonMaskingInterceptorPrototypeProperty) {
auto isolate = CcTest::isolate();
v8::HandleScope handle_scope(isolate);
LocalContext context;
ShouldInterceptData intercept_data;
intercept_data.value = 239;
intercept_data.should_intercept = true;
auto interceptor_templ = v8::ObjectTemplate::New(isolate);
v8::NamedPropertyHandlerConfiguration conf(ShouldNamedInterceptor);
conf.flags = v8::PropertyHandlerFlags::kNonMasking;
conf.data = BuildWrappedObject<ShouldInterceptData>(isolate, &intercept_data);
interceptor_templ->SetHandler(conf);
auto interceptor =
interceptor_templ->NewInstance(context.local()).ToLocalChecked();
context->Global()
->Set(context.local(), v8_str("obj"), interceptor)
.FromJust();
ExpectInt32("obj.whatever", 239);
CompileRun("obj.__proto__ = {'whatever': 4};");
ExpectInt32("obj.whatever", 4);
CompileRun("delete obj.__proto__.whatever;");
ExpectInt32("obj.whatever", 239);
}
THREADED_TEST(NonMaskingInterceptorPrototypePropertyIC) {
auto isolate = CcTest::isolate();
v8::HandleScope handle_scope(isolate);
LocalContext context;
ShouldInterceptData intercept_data;
intercept_data.value = 239;
intercept_data.should_intercept = true;
auto interceptor_templ = v8::ObjectTemplate::New(isolate);
v8::NamedPropertyHandlerConfiguration conf(ShouldNamedInterceptor);
conf.flags = v8::PropertyHandlerFlags::kNonMasking;
conf.data = BuildWrappedObject<ShouldInterceptData>(isolate, &intercept_data);
interceptor_templ->SetHandler(conf);
auto interceptor =
interceptor_templ->NewInstance(context.local()).ToLocalChecked();
context->Global()
->Set(context.local(), v8_str("obj"), interceptor)
.FromJust();
CompileRun(
"outer = {};"
"outer.__proto__ = obj;"
"function f(obj) {"
" var x;"
" for (var i = 0; i < 4; i++) {"
" x = obj.whatever;"
" }"
" return x;"
"}");
// Receiver == holder.
CompileRun("obj.__proto__ = null;");
ExpectInt32("f(obj)", 239);
ExpectInt32("f(outer)", 239);
// Receiver != holder.
CompileRun("Object.setPrototypeOf(obj, {});");
ExpectInt32("f(obj)", 239);
ExpectInt32("f(outer)", 239);
// Masked value on prototype.
CompileRun("obj.__proto__.whatever = 4;");
CompileRun("obj.__proto__.__proto__ = { 'whatever' : 5 };");
ExpectInt32("f(obj)", 4);
ExpectInt32("f(outer)", 4);
// Masked value on prototype prototype.
CompileRun("delete obj.__proto__.whatever;");
ExpectInt32("f(obj)", 5);
ExpectInt32("f(outer)", 5);
// Reset.
CompileRun("delete obj.__proto__.__proto__.whatever;");
ExpectInt32("f(obj)", 239);
ExpectInt32("f(outer)", 239);
// Masked value on self.
CompileRun("obj.whatever = 4;");
ExpectInt32("f(obj)", 4);
ExpectInt32("f(outer)", 4);
// Reset.
CompileRun("delete obj.whatever;");
ExpectInt32("f(obj)", 239);
ExpectInt32("f(outer)", 239);
CompileRun("outer.whatever = 4;");
ExpectInt32("f(obj)", 239);
ExpectInt32("f(outer)", 4);
}
namespace {
void DatabaseGetter(Local<Name> name,
const v8::PropertyCallbackInfo<Value>& info) {
ApiTestFuzzer::Fuzz();
auto context = info.GetIsolate()->GetCurrentContext();
Local<v8::Object> db = info.Holder()
->GetRealNamedProperty(context, v8_str("db"))
.ToLocalChecked()
.As<v8::Object>();
if (!db->Has(context, name).FromJust()) return;
info.GetReturnValue().Set(db->Get(context, name).ToLocalChecked());
}
void DatabaseSetter(Local<Name> name, Local<Value> value,
const v8::PropertyCallbackInfo<Value>& info) {
ApiTestFuzzer::Fuzz();
auto context = info.GetIsolate()->GetCurrentContext();
if (name->Equals(context, v8_str("db")).FromJust()) return;
Local<v8::Object> db = info.Holder()
->GetRealNamedProperty(context, v8_str("db"))
.ToLocalChecked()
.As<v8::Object>();
db->Set(context, name, value).FromJust();
info.GetReturnValue().Set(value);
}
} // namespace
THREADED_TEST(NonMaskingInterceptorGlobalEvalRegression) {
auto isolate = CcTest::isolate();
v8::HandleScope handle_scope(isolate);
LocalContext context;
auto interceptor_templ = v8::ObjectTemplate::New(isolate);
v8::NamedPropertyHandlerConfiguration conf(DatabaseGetter, DatabaseSetter);
conf.flags = v8::PropertyHandlerFlags::kNonMasking;
interceptor_templ->SetHandler(conf);
context->Global()
->Set(context.local(), v8_str("intercepted_1"),
interceptor_templ->NewInstance(context.local()).ToLocalChecked())
.FromJust();
context->Global()
->Set(context.local(), v8_str("intercepted_2"),
interceptor_templ->NewInstance(context.local()).ToLocalChecked())
.FromJust();
// Init dbs.
CompileRun(
"intercepted_1.db = {};"
"intercepted_2.db = {};");
ExpectInt32(
"var obj = intercepted_1;"
"obj.x = 4;"
"eval('obj.x');"
"eval('obj.x');"
"eval('obj.x');"
"obj = intercepted_2;"
"obj.x = 9;"
"eval('obj.x');",
9);
}
static void CheckReceiver(Local<Name> name,
const v8::PropertyCallbackInfo<v8::Value>& info) {
CHECK(info.This()->IsObject());
}
TEST(Regress609134Interceptor) {
LocalContext env;
v8::Isolate* isolate = env->GetIsolate();
v8::HandleScope scope(isolate);
auto fun_templ = v8::FunctionTemplate::New(isolate);
fun_templ->InstanceTemplate()->SetHandler(
v8::NamedPropertyHandlerConfiguration(CheckReceiver));
CHECK(env->Global()
->Set(env.local(), v8_str("Fun"),
fun_templ->GetFunction(env.local()).ToLocalChecked())
.FromJust());
CompileRun(
"var f = new Fun();"
"Number.prototype.__proto__ = f;"
"var a = 42;"
"for (var i = 0; i<3; i++) { a.foo; }");
}
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