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Copy pathJSBase.cpp
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223 lines (187 loc) · 8.48 KB
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/*
* Copyright (C) 2006, 2007, 2013, 2016 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "JSBase.h"
#include "JSBaseInternal.h"
#include "JSBasePrivate.h"
#include "APICast.h"
#include "Completion.h"
#include "GCActivityCallback.h"
#include "JSCInlines.h"
#include "JSLock.h"
#include "ObjectConstructor.h"
#include "OpaqueJSString.h"
#include "SourceCode.h"
#if ENABLE(REMOTE_INSPECTOR)
#include "JSGlobalObjectInspectorController.h"
#endif
using namespace JSC;
JSValueRef JSEvaluateScriptInternal(const JSLockHolder&, JSContextRef ctx, JSObjectRef thisObject, const SourceCode& source, JSValueRef* exception)
{
JSObject* jsThisObject = toJS(thisObject);
// evaluate sets "this" to the global object if it is NULL
JSGlobalObject* globalObject = toJS(ctx);
NakedPtr<Exception> evaluationException;
JSValue returnValue = profiledEvaluate(globalObject, ProfilingReason::API, source, jsThisObject, evaluationException);
if (evaluationException) {
if (exception)
*exception = toRef(globalObject, evaluationException->value());
#if ENABLE(REMOTE_INSPECTOR)
// FIXME: If we have a debugger attached we could learn about ParseError exceptions through
// ScriptDebugServer::sourceParsed and this path could produce a duplicate warning. The
// Debugger path is currently ignored by inspector.
// NOTE: If we don't have a debugger, this SourceCode will be forever lost to the inspector.
// We could stash it in the inspector in case an inspector is ever opened.
protect(globalObject->inspectorController())->reportAPIException(globalObject, evaluationException);
#endif
return nullptr;
}
if (returnValue)
return toRef(globalObject, returnValue);
// happens, for example, when the only statement is an empty (';') statement
return toRef(globalObject, jsUndefined());
}
JSValueRef JSEvaluateScript(JSContextRef ctx, JSStringRef script, JSObjectRef thisObject, JSStringRef sourceURLString, int startingLineNumber, JSValueRef* exception)
{
if (!ctx) {
ASSERT_NOT_REACHED();
return nullptr;
}
JSGlobalObject* globalObject = toJS(ctx);
VM& vm = globalObject->vm();
JSLockHolder locker(vm);
startingLineNumber = std::max(1, startingLineNumber);
auto sourceURL = sourceURLString ? URL({ }, sourceURLString->string()) : URL();
SourceCode source = makeSource(script->string(), SourceOrigin { sourceURL }, SourceTaintedOrigin::Untainted, sourceURL.string(), TextPosition(OrdinalNumber::fromOneBasedInt(startingLineNumber), OrdinalNumber()));
return JSEvaluateScriptInternal(locker, ctx, thisObject, source, exception);
}
bool JSCheckScriptSyntax(JSContextRef ctx, JSStringRef script, JSStringRef sourceURLString, int startingLineNumber, JSValueRef* exception)
{
if (!ctx) {
ASSERT_NOT_REACHED();
return false;
}
JSGlobalObject* globalObject = toJS(ctx);
VM& vm = globalObject->vm();
JSLockHolder locker(vm);
startingLineNumber = std::max(1, startingLineNumber);
auto sourceURL = sourceURLString ? URL({ }, sourceURLString->string()) : URL();
SourceCode source = makeSource(script->string(), SourceOrigin { sourceURL }, SourceTaintedOrigin::Untainted, sourceURL.string(), TextPosition(OrdinalNumber::fromOneBasedInt(startingLineNumber), OrdinalNumber()));
JSValue syntaxException;
bool isValidSyntax = checkSyntax(globalObject, source, &syntaxException);
if (!isValidSyntax) {
if (exception)
*exception = toRef(globalObject, syntaxException);
#if ENABLE(REMOTE_INSPECTOR)
Exception* exception = Exception::create(vm, syntaxException);
protect(globalObject->inspectorController())->reportAPIException(globalObject, exception);
#endif
return false;
}
return true;
}
void JSGarbageCollect(JSContextRef ctx)
{
// We used to recommend passing NULL as an argument here, which caused the only heap to be collected.
// As there is no longer a shared heap, the previously recommended usage became a no-op (but the GC
// will happen when the context group is destroyed).
// Because the function argument was originally ignored, some clients may pass their released context here,
// in which case there is a risk of crashing if another thread performs GC on the same heap in between.
if (!ctx)
return;
JSGlobalObject* globalObject = toJS(ctx);
VM& vm = globalObject->vm();
JSLockHolder locker(vm);
vm.heap.reportAbandonedObjectGraph();
}
void JSReportExtraMemoryCost(JSContextRef ctx, size_t size)
{
if (!ctx) {
ASSERT_NOT_REACHED();
return;
}
JSGlobalObject* globalObject = toJS(ctx);
VM& vm = globalObject->vm();
JSLockHolder locker(vm);
vm.heap.deprecatedReportExtraMemory(size);
}
extern "C" JS_EXPORT void JSSynchronousGarbageCollectForDebugging(JSContextRef);
extern "C" JS_EXPORT void JSSynchronousEdenCollectForDebugging(JSContextRef);
void JSSynchronousGarbageCollectForDebugging(JSContextRef ctx)
{
if (!ctx)
return;
JSGlobalObject* globalObject = toJS(ctx);
VM& vm = globalObject->vm();
JSLockHolder locker(vm);
vm.heap.collectNow(Sync, CollectionScope::Full);
}
void JSSynchronousEdenCollectForDebugging(JSContextRef ctx)
{
if (!ctx)
return;
JSGlobalObject* globalObject = toJS(ctx);
VM& vm = globalObject->vm();
JSLockHolder locker(vm);
vm.heap.collectSync(CollectionScope::Eden);
}
void JSDisableGCTimer(void)
{
GCActivityCallback::s_shouldCreateGCTimer = false;
}
#if !OS(DARWIN) && !OS(WINDOWS)
bool JSConfigureSignalForGC(int signal)
{
if (g_wtfConfig.isThreadSuspendResumeSignalConfigured)
return false;
g_wtfConfig.sigThreadSuspendResume = signal;
g_wtfConfig.isUserSpecifiedThreadSuspendResumeSignalConfigured = true;
return true;
}
#endif
JSObjectRef JSGetMemoryUsageStatistics(JSContextRef ctx)
{
if (!ctx) {
ASSERT_NOT_REACHED();
return nullptr;
}
JSGlobalObject* globalObject = toJS(ctx);
VM& vm = globalObject->vm();
JSLockHolder locker(vm);
auto typeCounts = vm.heap.objectTypeCounts();
JSObject* objectTypeCounts = constructEmptyObject(globalObject);
for (auto& it : typeCounts)
objectTypeCounts->putDirect(vm, Identifier::fromString(vm, it.key), jsNumber(it.value));
JSObject* object = constructEmptyObject(globalObject);
object->putDirect(vm, Identifier::fromString(vm, "heapSize"_s), jsNumber(vm.heap.size()));
object->putDirect(vm, Identifier::fromString(vm, "heapCapacity"_s), jsNumber(vm.heap.capacity()));
object->putDirect(vm, Identifier::fromString(vm, "extraMemorySize"_s), jsNumber(vm.heap.extraMemorySize()));
object->putDirect(vm, Identifier::fromString(vm, "objectCount"_s), jsNumber(vm.heap.objectCount()));
object->putDirect(vm, Identifier::fromString(vm, "protectedObjectCount"_s), jsNumber(vm.heap.protectedObjectCount()));
object->putDirect(vm, Identifier::fromString(vm, "globalObjectCount"_s), jsNumber(vm.heap.globalObjectCount()));
object->putDirect(vm, Identifier::fromString(vm, "protectedGlobalObjectCount"_s), jsNumber(vm.heap.protectedGlobalObjectCount()));
object->putDirect(vm, Identifier::fromString(vm, "objectTypeCounts"_s), objectTypeCounts);
return toRef(object);
}