aa7198dfdd
Legacy const is changed so that a declaration declares a configurable, but non-writable, slot, and the initializer reconfigures it (when possible) to non-configurable non-writable. This avoids the need for "the hole" as marker value in JSContextExtensionObjects and GlobalObjects. Undefined is used instead. BUG= R=rossberg@chromium.org Review URL: https://codereview.chromium.org/379893002 git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22379 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
719 lines
21 KiB
C++
719 lines
21 KiB
C++
// Copyright 2007-2008 the V8 project authors. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#include <stdlib.h>
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#include "src/v8.h"
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#include "src/heap.h"
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#include "test/cctest/cctest.h"
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using namespace v8;
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enum Expectations {
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EXPECT_RESULT,
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EXPECT_EXCEPTION,
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EXPECT_ERROR
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};
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// A DeclarationContext holds a reference to a v8::Context and keeps
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// track of various declaration related counters to make it easier to
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// track if global declarations in the presence of interceptors behave
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// the right way.
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class DeclarationContext {
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public:
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DeclarationContext();
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virtual ~DeclarationContext() {
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if (is_initialized_) {
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Isolate* isolate = CcTest::isolate();
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HandleScope scope(isolate);
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Local<Context> context = Local<Context>::New(isolate, context_);
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context->Exit();
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context_.Reset();
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}
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}
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void Check(const char* source,
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int get, int set, int has,
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Expectations expectations,
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v8::Handle<Value> value = Local<Value>());
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int get_count() const { return get_count_; }
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int set_count() const { return set_count_; }
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int query_count() const { return query_count_; }
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protected:
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virtual v8::Handle<Value> Get(Local<String> key);
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virtual v8::Handle<Value> Set(Local<String> key, Local<Value> value);
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virtual v8::Handle<Integer> Query(Local<String> key);
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void InitializeIfNeeded();
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// Perform optional initialization steps on the context after it has
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// been created. Defaults to none but may be overwritten.
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virtual void PostInitializeContext(Handle<Context> context) {}
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// Get the holder for the interceptor. Default to the instance template
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// but may be overwritten.
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virtual Local<ObjectTemplate> GetHolder(Local<FunctionTemplate> function) {
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return function->InstanceTemplate();
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}
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// The handlers are called as static functions that forward
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// to the instance specific virtual methods.
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static void HandleGet(Local<String> key,
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const v8::PropertyCallbackInfo<v8::Value>& info);
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static void HandleSet(Local<String> key,
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Local<Value> value,
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const v8::PropertyCallbackInfo<v8::Value>& info);
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static void HandleQuery(Local<String> key,
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const v8::PropertyCallbackInfo<v8::Integer>& info);
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v8::Isolate* isolate() const { return CcTest::isolate(); }
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private:
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bool is_initialized_;
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Persistent<Context> context_;
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int get_count_;
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int set_count_;
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int query_count_;
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static DeclarationContext* GetInstance(Local<Value> data);
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};
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DeclarationContext::DeclarationContext()
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: is_initialized_(false), get_count_(0), set_count_(0), query_count_(0) {
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// Do nothing.
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}
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void DeclarationContext::InitializeIfNeeded() {
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if (is_initialized_) return;
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Isolate* isolate = CcTest::isolate();
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HandleScope scope(isolate);
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Local<FunctionTemplate> function = FunctionTemplate::New(isolate);
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Local<Value> data = External::New(CcTest::isolate(), this);
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GetHolder(function)->SetNamedPropertyHandler(&HandleGet,
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&HandleSet,
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&HandleQuery,
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0, 0,
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data);
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Local<Context> context = Context::New(isolate,
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0,
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function->InstanceTemplate(),
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Local<Value>());
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context_.Reset(isolate, context);
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context->Enter();
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is_initialized_ = true;
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PostInitializeContext(context);
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}
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void DeclarationContext::Check(const char* source,
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int get, int set, int query,
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Expectations expectations,
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v8::Handle<Value> value) {
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InitializeIfNeeded();
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// A retry after a GC may pollute the counts, so perform gc now
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// to avoid that.
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CcTest::heap()->CollectGarbage(v8::internal::NEW_SPACE);
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HandleScope scope(CcTest::isolate());
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TryCatch catcher;
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catcher.SetVerbose(true);
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Local<Script> script =
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Script::Compile(String::NewFromUtf8(CcTest::isolate(), source));
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if (expectations == EXPECT_ERROR) {
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CHECK(script.IsEmpty());
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return;
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}
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CHECK(!script.IsEmpty());
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Local<Value> result = script->Run();
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CHECK_EQ(get, get_count());
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CHECK_EQ(set, set_count());
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CHECK_EQ(query, query_count());
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if (expectations == EXPECT_RESULT) {
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CHECK(!catcher.HasCaught());
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if (!value.IsEmpty()) {
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CHECK_EQ(value, result);
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}
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} else {
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CHECK(expectations == EXPECT_EXCEPTION);
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CHECK(catcher.HasCaught());
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if (!value.IsEmpty()) {
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CHECK_EQ(value, catcher.Exception());
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}
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}
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// Clean slate for the next test.
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CcTest::heap()->CollectAllAvailableGarbage();
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}
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void DeclarationContext::HandleGet(
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Local<String> key,
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const v8::PropertyCallbackInfo<v8::Value>& info) {
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DeclarationContext* context = GetInstance(info.Data());
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context->get_count_++;
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info.GetReturnValue().Set(context->Get(key));
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}
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void DeclarationContext::HandleSet(
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Local<String> key,
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Local<Value> value,
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const v8::PropertyCallbackInfo<v8::Value>& info) {
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DeclarationContext* context = GetInstance(info.Data());
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context->set_count_++;
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info.GetReturnValue().Set(context->Set(key, value));
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}
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void DeclarationContext::HandleQuery(
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Local<String> key,
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const v8::PropertyCallbackInfo<v8::Integer>& info) {
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DeclarationContext* context = GetInstance(info.Data());
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context->query_count_++;
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info.GetReturnValue().Set(context->Query(key));
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}
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DeclarationContext* DeclarationContext::GetInstance(Local<Value> data) {
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void* value = Local<External>::Cast(data)->Value();
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return static_cast<DeclarationContext*>(value);
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}
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v8::Handle<Value> DeclarationContext::Get(Local<String> key) {
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return v8::Handle<Value>();
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}
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v8::Handle<Value> DeclarationContext::Set(Local<String> key,
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Local<Value> value) {
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return v8::Handle<Value>();
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}
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v8::Handle<Integer> DeclarationContext::Query(Local<String> key) {
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return v8::Handle<Integer>();
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}
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// Test global declaration of a property the interceptor doesn't know
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// about and doesn't handle.
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TEST(Unknown) {
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HandleScope scope(CcTest::isolate());
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v8::V8::Initialize();
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{ DeclarationContext context;
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context.Check("var x; x",
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1, // access
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0, 0, EXPECT_RESULT, Undefined(CcTest::isolate()));
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}
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{ DeclarationContext context;
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context.Check("var x = 0; x",
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1, // access
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1, // initialization
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0, EXPECT_RESULT, Number::New(CcTest::isolate(), 0));
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}
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{ DeclarationContext context;
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context.Check("function x() { }; x",
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1, // access
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0,
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0,
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EXPECT_RESULT);
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}
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{ DeclarationContext context;
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context.Check("const x; x",
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1, // access
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0, 0, EXPECT_RESULT, Undefined(CcTest::isolate()));
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}
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{ DeclarationContext context;
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context.Check("const x = 0; x",
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1, // access
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0,
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0,
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EXPECT_RESULT, Number::New(CcTest::isolate(), 0));
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}
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}
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class AbsentPropertyContext: public DeclarationContext {
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protected:
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virtual v8::Handle<Integer> Query(Local<String> key) {
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return v8::Handle<Integer>();
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}
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};
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TEST(Absent) {
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v8::Isolate* isolate = CcTest::isolate();
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v8::V8::Initialize();
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HandleScope scope(isolate);
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{ AbsentPropertyContext context;
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context.Check("var x; x",
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1, // access
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0, 0, EXPECT_RESULT, Undefined(isolate));
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}
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{ AbsentPropertyContext context;
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context.Check("var x = 0; x",
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1, // access
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1, // initialization
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0, EXPECT_RESULT, Number::New(isolate, 0));
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}
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{ AbsentPropertyContext context;
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context.Check("function x() { }; x",
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1, // access
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0,
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0,
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EXPECT_RESULT);
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}
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{ AbsentPropertyContext context;
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context.Check("const x; x",
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1, // access
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0, 0, EXPECT_RESULT, Undefined(isolate));
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}
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{ AbsentPropertyContext context;
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context.Check("const x = 0; x",
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1, // access
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0, 0, EXPECT_RESULT, Number::New(isolate, 0));
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}
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{ AbsentPropertyContext context;
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context.Check("if (false) { var x = 0 }; x",
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1, // access
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0, 0, EXPECT_RESULT, Undefined(isolate));
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}
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}
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class AppearingPropertyContext: public DeclarationContext {
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public:
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enum State {
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DECLARE,
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INITIALIZE_IF_ASSIGN,
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UNKNOWN
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};
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AppearingPropertyContext() : state_(DECLARE) { }
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protected:
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virtual v8::Handle<Integer> Query(Local<String> key) {
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switch (state_) {
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case DECLARE:
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// Force declaration by returning that the
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// property is absent.
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state_ = INITIALIZE_IF_ASSIGN;
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return Handle<Integer>();
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case INITIALIZE_IF_ASSIGN:
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// Return that the property is present so we only get the
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// setter called when initializing with a value.
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state_ = UNKNOWN;
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return Integer::New(isolate(), v8::None);
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default:
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CHECK(state_ == UNKNOWN);
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break;
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}
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// Do the lookup in the object.
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return v8::Handle<Integer>();
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}
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private:
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State state_;
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};
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TEST(Appearing) {
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v8::V8::Initialize();
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HandleScope scope(CcTest::isolate());
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{ AppearingPropertyContext context;
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context.Check("var x; x",
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1, // access
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0, 0, EXPECT_RESULT, Undefined(CcTest::isolate()));
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}
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{ AppearingPropertyContext context;
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context.Check("var x = 0; x",
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1, // access
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1, // initialization
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0, EXPECT_RESULT, Number::New(CcTest::isolate(), 0));
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}
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{ AppearingPropertyContext context;
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context.Check("function x() { }; x",
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1, // access
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0,
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0,
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EXPECT_RESULT);
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}
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{ AppearingPropertyContext context;
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context.Check("const x; x",
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1, // access
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0, 0, EXPECT_RESULT, Undefined(CcTest::isolate()));
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}
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{ AppearingPropertyContext context;
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context.Check("const x = 0; x",
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1, // access
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0, 0, EXPECT_RESULT, Number::New(CcTest::isolate(), 0));
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}
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}
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class ExistsInPrototypeContext: public DeclarationContext {
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public:
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ExistsInPrototypeContext() { InitializeIfNeeded(); }
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protected:
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virtual v8::Handle<Integer> Query(Local<String> key) {
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// Let it seem that the property exists in the prototype object.
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return Integer::New(isolate(), v8::None);
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}
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// Use the prototype as the holder for the interceptors.
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virtual Local<ObjectTemplate> GetHolder(Local<FunctionTemplate> function) {
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return function->PrototypeTemplate();
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}
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};
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TEST(ExistsInPrototype) {
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HandleScope scope(CcTest::isolate());
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// Sanity check to make sure that the holder of the interceptor
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// really is the prototype object.
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{ ExistsInPrototypeContext context;
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context.Check("this.x = 87; this.x",
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0,
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0,
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0,
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EXPECT_RESULT, Number::New(CcTest::isolate(), 87));
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}
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{ ExistsInPrototypeContext context;
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context.Check("var x; x",
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0,
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0,
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0,
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EXPECT_RESULT, Undefined(CcTest::isolate()));
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}
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{ ExistsInPrototypeContext context;
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context.Check("var x = 0; x",
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0,
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0,
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0,
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EXPECT_RESULT, Number::New(CcTest::isolate(), 0));
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}
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{ ExistsInPrototypeContext context;
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context.Check("const x; x",
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0,
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0,
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0,
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EXPECT_RESULT, Undefined(CcTest::isolate()));
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}
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{ ExistsInPrototypeContext context;
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context.Check("const x = 0; x",
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0,
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0,
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0,
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EXPECT_RESULT, Number::New(CcTest::isolate(), 0));
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}
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}
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class AbsentInPrototypeContext: public DeclarationContext {
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protected:
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virtual v8::Handle<Integer> Query(Local<String> key) {
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// Let it seem that the property is absent in the prototype object.
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return Handle<Integer>();
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}
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// Use the prototype as the holder for the interceptors.
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virtual Local<ObjectTemplate> GetHolder(Local<FunctionTemplate> function) {
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return function->PrototypeTemplate();
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}
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};
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TEST(AbsentInPrototype) {
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v8::V8::Initialize();
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HandleScope scope(CcTest::isolate());
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{ AbsentInPrototypeContext context;
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context.Check("if (false) { var x = 0; }; x",
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0,
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0,
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0,
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EXPECT_RESULT, Undefined(CcTest::isolate()));
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}
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}
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class ExistsInHiddenPrototypeContext: public DeclarationContext {
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public:
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ExistsInHiddenPrototypeContext() {
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hidden_proto_ = FunctionTemplate::New(CcTest::isolate());
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hidden_proto_->SetHiddenPrototype(true);
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}
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protected:
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virtual v8::Handle<Integer> Query(Local<String> key) {
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// Let it seem that the property exists in the hidden prototype object.
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return Integer::New(isolate(), v8::None);
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}
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// Install the hidden prototype after the global object has been created.
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virtual void PostInitializeContext(Handle<Context> context) {
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Local<Object> global_object = context->Global();
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Local<Object> hidden_proto = hidden_proto_->GetFunction()->NewInstance();
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Local<Object> inner_global =
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Local<Object>::Cast(global_object->GetPrototype());
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inner_global->SetPrototype(hidden_proto);
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}
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// Use the hidden prototype as the holder for the interceptors.
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virtual Local<ObjectTemplate> GetHolder(Local<FunctionTemplate> function) {
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return hidden_proto_->InstanceTemplate();
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}
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private:
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Local<FunctionTemplate> hidden_proto_;
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};
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TEST(ExistsInHiddenPrototype) {
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HandleScope scope(CcTest::isolate());
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{ ExistsInHiddenPrototypeContext context;
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context.Check("var x; x", 0, 0, 0, EXPECT_RESULT,
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Undefined(CcTest::isolate()));
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}
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{ ExistsInHiddenPrototypeContext context;
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context.Check("var x = 0; x", 0, 0, 0, EXPECT_RESULT,
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Number::New(CcTest::isolate(), 0));
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}
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{ ExistsInHiddenPrototypeContext context;
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context.Check("function x() { }; x",
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0,
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0,
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0,
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EXPECT_RESULT);
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}
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// TODO(mstarzinger): The semantics of global const is vague.
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{ ExistsInHiddenPrototypeContext context;
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context.Check("const x; x", 0, 0, 0, EXPECT_RESULT,
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Undefined(CcTest::isolate()));
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}
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// TODO(mstarzinger): The semantics of global const is vague.
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{ ExistsInHiddenPrototypeContext context;
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context.Check("const x = 0; x", 0, 0, 0, EXPECT_RESULT,
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Number::New(CcTest::isolate(), 0));
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}
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}
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class SimpleContext {
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public:
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SimpleContext()
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: handle_scope_(CcTest::isolate()),
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context_(Context::New(CcTest::isolate())) {
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context_->Enter();
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}
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~SimpleContext() {
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context_->Exit();
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}
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void Check(const char* source,
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Expectations expectations,
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v8::Handle<Value> value = Local<Value>()) {
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HandleScope scope(context_->GetIsolate());
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TryCatch catcher;
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catcher.SetVerbose(true);
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Local<Script> script =
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Script::Compile(String::NewFromUtf8(context_->GetIsolate(), source));
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if (expectations == EXPECT_ERROR) {
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CHECK(script.IsEmpty());
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return;
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}
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CHECK(!script.IsEmpty());
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Local<Value> result = script->Run();
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if (expectations == EXPECT_RESULT) {
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CHECK(!catcher.HasCaught());
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if (!value.IsEmpty()) {
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CHECK_EQ(value, result);
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}
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} else {
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CHECK(expectations == EXPECT_EXCEPTION);
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CHECK(catcher.HasCaught());
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if (!value.IsEmpty()) {
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CHECK_EQ(value, catcher.Exception());
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}
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}
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}
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private:
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HandleScope handle_scope_;
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Local<Context> context_;
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};
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TEST(CrossScriptReferences) {
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v8::Isolate* isolate = CcTest::isolate();
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HandleScope scope(isolate);
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{ SimpleContext context;
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context.Check("var x = 1; x",
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EXPECT_RESULT, Number::New(isolate, 1));
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context.Check("var x = 2; x",
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EXPECT_RESULT, Number::New(isolate, 2));
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context.Check("const x = 3; x", EXPECT_EXCEPTION);
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context.Check("const x = 4; x", EXPECT_EXCEPTION);
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context.Check("x = 5; x",
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EXPECT_RESULT, Number::New(isolate, 5));
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context.Check("var x = 6; x",
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EXPECT_RESULT, Number::New(isolate, 6));
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context.Check("this.x",
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EXPECT_RESULT, Number::New(isolate, 6));
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context.Check("function x() { return 7 }; x()",
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EXPECT_RESULT, Number::New(isolate, 7));
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}
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{ SimpleContext context;
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context.Check("const x = 1; x",
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EXPECT_RESULT, Number::New(isolate, 1));
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context.Check("var x = 2; x", // assignment ignored
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EXPECT_RESULT, Number::New(isolate, 1));
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context.Check("const x = 3; x", EXPECT_EXCEPTION);
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context.Check("x = 4; x", // assignment ignored
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EXPECT_RESULT, Number::New(isolate, 1));
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context.Check("var x = 5; x", // assignment ignored
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EXPECT_RESULT, Number::New(isolate, 1));
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context.Check("this.x",
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EXPECT_RESULT, Number::New(isolate, 1));
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context.Check("function x() { return 7 }; x",
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EXPECT_EXCEPTION);
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}
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}
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TEST(CrossScriptReferencesHarmony) {
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i::FLAG_use_strict = true;
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i::FLAG_harmony_scoping = true;
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i::FLAG_harmony_modules = true;
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v8::Isolate* isolate = CcTest::isolate();
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HandleScope scope(isolate);
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const char* decs[] = {
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"var x = 1; x", "x", "this.x",
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"function x() { return 1 }; x()", "x()", "this.x()",
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"let x = 1; x", "x", "this.x",
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"const x = 1; x", "x", "this.x",
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"module x { export let a = 1 }; x.a", "x.a", "this.x.a",
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NULL
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};
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for (int i = 0; decs[i] != NULL; i += 3) {
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SimpleContext context;
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context.Check(decs[i], EXPECT_RESULT, Number::New(isolate, 1));
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context.Check(decs[i+1], EXPECT_RESULT, Number::New(isolate, 1));
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// TODO(rossberg): The current ES6 draft spec does not reflect lexical
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// bindings on the global object. However, this will probably change, in
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// which case we reactivate the following test.
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if (i/3 < 2) {
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context.Check(decs[i+2], EXPECT_RESULT, Number::New(isolate, 1));
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}
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}
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}
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TEST(CrossScriptConflicts) {
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i::FLAG_use_strict = true;
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i::FLAG_harmony_scoping = true;
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i::FLAG_harmony_modules = true;
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HandleScope scope(CcTest::isolate());
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const char* firsts[] = {
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"var x = 1; x",
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"function x() { return 1 }; x()",
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"let x = 1; x",
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"const x = 1; x",
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"module x { export let a = 1 }; x.a",
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NULL
|
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};
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const char* seconds[] = {
|
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"var x = 2; x",
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"function x() { return 2 }; x()",
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"let x = 2; x",
|
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"const x = 2; x",
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"module x { export let a = 2 }; x.a",
|
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NULL
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|
};
|
|
|
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for (int i = 0; firsts[i] != NULL; ++i) {
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for (int j = 0; seconds[j] != NULL; ++j) {
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SimpleContext context;
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context.Check(firsts[i], EXPECT_RESULT,
|
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Number::New(CcTest::isolate(), 1));
|
|
// TODO(rossberg): All tests should actually be errors in Harmony,
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// but we currently do not detect the cases where the first declaration
|
|
// is not lexical.
|
|
context.Check(seconds[j],
|
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i < 2 ? EXPECT_RESULT : EXPECT_ERROR,
|
|
Number::New(CcTest::isolate(), 2));
|
|
}
|
|
}
|
|
}
|