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/*
* Copyright (C) 2013 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"
#import "APICast.h"
#import "JSCInlines.h"
#import "JSContextInternal.h"
#import "JSContextPrivate.h"
#import "JSContextRefInternal.h"
#import "JSGlobalObject.h"
#import "JSValueInternal.h"
#import "JSVirtualMachineInternal.h"
#import "JSWrapperMap.h"
#import "JavaScriptCore.h"
#import "ObjcRuntimeExtras.h"
#import "StrongInlines.h"
#import <wtf/HashSet.h>
#if JSC_OBJC_API_ENABLED
@implementation JSContext {
JSVirtualMachine *m_virtualMachine;
JSGlobalContextRef m_context;
JSWrapperMap *m_wrapperMap;
JSC::Strong<JSC::JSObject> m_exception;
}
@synthesize exceptionHandler;
- (JSGlobalContextRef)JSGlobalContextRef
{
return m_context;
}
- (instancetype)init
{
return [self initWithVirtualMachine:[[[JSVirtualMachine alloc] init] autorelease]];
}
- (instancetype)initWithVirtualMachine:(JSVirtualMachine *)virtualMachine
{
self = [super init];
if (!self)
return nil;
m_virtualMachine = [virtualMachine retain];
m_context = JSGlobalContextCreateInGroup(getGroupFromVirtualMachine(virtualMachine), 0);
m_wrapperMap = [[JSWrapperMap alloc] initWithContext:self];
self.exceptionHandler = ^(JSContext *context, JSValue *exceptionValue) {
context.exception = exceptionValue;
};
[m_virtualMachine addContext:self forGlobalContextRef:m_context];
return self;
}
- (void)dealloc
{
m_exception.clear();
[m_wrapperMap release];
JSGlobalContextRelease(m_context);
[m_virtualMachine release];
[self.exceptionHandler release];
[super dealloc];
}
- (JSValue *)evaluateScript:(NSString *)script
{
return [self evaluateScript:script withSourceURL:nil];
}
- (JSValue *)evaluateScript:(NSString *)script withSourceURL:(NSURL *)sourceURL
{
JSValueRef exceptionValue = nullptr;
JSStringRef scriptJS = JSStringCreateWithCFString((CFStringRef)script);
JSStringRef sourceURLJS = sourceURL ? JSStringCreateWithCFString((CFStringRef)[sourceURL absoluteString]) : nullptr;
JSValueRef result = JSEvaluateScript(m_context, scriptJS, nullptr, sourceURLJS, 0, &exceptionValue);
if (sourceURLJS)
JSStringRelease(sourceURLJS);
JSStringRelease(scriptJS);
if (exceptionValue)
return [self valueFromNotifyException:exceptionValue];
return [JSValue valueWithJSValueRef:result inContext:self];
}
- (void)setException:(JSValue *)value
{
JSC::JSLockHolder locker(toJS(m_context));
if (value)
m_exception.set(toJS(m_context)->vm(), toJS(JSValueToObject(m_context, valueInternalValue(value), 0)));
else
m_exception.clear();
}
- (JSValue *)exception
{
if (!m_exception)
return nil;
return [JSValue valueWithJSValueRef:toRef(m_exception.get()) inContext:self];
}
- (JSWrapperMap *)wrapperMap
{
return m_wrapperMap;
}
- (JSValue *)globalObject
{
return [JSValue valueWithJSValueRef:JSContextGetGlobalObject(m_context) inContext:self];
}
+ (JSContext *)currentContext
{
WTFThreadData& threadData = wtfThreadData();
CallbackData *entry = (CallbackData *)threadData.m_apiData;
return entry ? entry->context : nil;
}
+ (JSValue *)currentThis
{
WTFThreadData& threadData = wtfThreadData();
CallbackData *entry = (CallbackData *)threadData.m_apiData;
if (!entry)
return nil;
return [JSValue valueWithJSValueRef:entry->thisValue inContext:[JSContext currentContext]];
}
+ (JSValue *)currentCallee
{
WTFThreadData& threadData = wtfThreadData();
CallbackData *entry = (CallbackData *)threadData.m_apiData;
if (!entry)
return nil;
return [JSValue valueWithJSValueRef:entry->calleeValue inContext:[JSContext currentContext]];
}
+ (NSArray *)currentArguments
{
WTFThreadData& threadData = wtfThreadData();
CallbackData *entry = (CallbackData *)threadData.m_apiData;
if (!entry)
return nil;
if (!entry->currentArguments) {
JSContext *context = [JSContext currentContext];
size_t count = entry->argumentCount;
JSValue * argumentArray[count];
for (size_t i =0; i < count; ++i)
argumentArray[i] = [JSValue valueWithJSValueRef:entry->arguments[i] inContext:context];
entry->currentArguments = [[NSArray alloc] initWithObjects:argumentArray count:count];
}
return entry->currentArguments;
}
- (JSVirtualMachine *)virtualMachine
{
return m_virtualMachine;
}
- (NSString *)name
{
JSStringRef name = JSGlobalContextCopyName(m_context);
if (!name)
return nil;
return [(NSString *)JSStringCopyCFString(kCFAllocatorDefault, name) autorelease];
}
- (void)setName:(NSString *)name
{
JSStringRef nameJS = name ? JSStringCreateWithCFString((CFStringRef)[[name copy] autorelease]) : nullptr;
JSGlobalContextSetName(m_context, nameJS);
if (nameJS)
JSStringRelease(nameJS);
}
- (BOOL)_remoteInspectionEnabled
{
return JSGlobalContextGetRemoteInspectionEnabled(m_context);
}
- (void)_setRemoteInspectionEnabled:(BOOL)enabled
{
JSGlobalContextSetRemoteInspectionEnabled(m_context, enabled);
}
- (BOOL)_includesNativeCallStackWhenReportingExceptions
{
return JSGlobalContextGetIncludesNativeCallStackWhenReportingExceptions(m_context);
}
- (void)_setIncludesNativeCallStackWhenReportingExceptions:(BOOL)includeNativeCallStack
{
JSGlobalContextSetIncludesNativeCallStackWhenReportingExceptions(m_context, includeNativeCallStack);
}
- (CFRunLoopRef)_debuggerRunLoop
{
return JSGlobalContextGetDebuggerRunLoop(m_context);
}
- (void)_setDebuggerRunLoop:(CFRunLoopRef)runLoop
{
JSGlobalContextSetDebuggerRunLoop(m_context, runLoop);
}
@end
@implementation JSContext(SubscriptSupport)
- (JSValue *)objectForKeyedSubscript:(id)key
{
return [self globalObject][key];
}
- (void)setObject:(id)object forKeyedSubscript:(NSObject <NSCopying> *)key
{
[self globalObject][key] = object;
}
@end
@implementation JSContext (Internal)
- (instancetype)initWithGlobalContextRef:(JSGlobalContextRef)context
{
self = [super init];
if (!self)
return nil;
JSC::JSGlobalObject* globalObject = toJS(context)->lexicalGlobalObject();
m_virtualMachine = [[JSVirtualMachine virtualMachineWithContextGroupRef:toRef(&globalObject->vm())] retain];
ASSERT(m_virtualMachine);
m_context = JSGlobalContextRetain(context);
m_wrapperMap = [[JSWrapperMap alloc] initWithContext:self];
self.exceptionHandler = ^(JSContext *context, JSValue *exceptionValue) {
context.exception = exceptionValue;
};
[m_virtualMachine addContext:self forGlobalContextRef:m_context];
return self;
}
- (void)notifyException:(JSValueRef)exceptionValue
{
self.exceptionHandler(self, [JSValue valueWithJSValueRef:exceptionValue inContext:self]);
}
- (JSValue *)valueFromNotifyException:(JSValueRef)exceptionValue
{
[self notifyException:exceptionValue];
return [JSValue valueWithUndefinedInContext:self];
}
- (BOOL)boolFromNotifyException:(JSValueRef)exceptionValue
{
[self notifyException:exceptionValue];
return NO;
}
- (void)beginCallbackWithData:(CallbackData *)callbackData calleeValue:(JSValueRef)calleeValue thisValue:(JSValueRef)thisValue argumentCount:(size_t)argumentCount arguments:(const JSValueRef *)arguments
{
WTFThreadData& threadData = wtfThreadData();
[self retain];
CallbackData *prevStack = (CallbackData *)threadData.m_apiData;
*callbackData = (CallbackData){ prevStack, self, [self.exception retain], calleeValue, thisValue, argumentCount, arguments, nil };
threadData.m_apiData = callbackData;
self.exception = nil;
}
- (void)endCallbackWithData:(CallbackData *)callbackData
{
WTFThreadData& threadData = wtfThreadData();
self.exception = callbackData->preservedException;
[callbackData->preservedException release];
[callbackData->currentArguments release];
threadData.m_apiData = callbackData->next;
[self release];
}
- (JSValue *)wrapperForObjCObject:(id)object
{
JSC::JSLockHolder locker(toJS(m_context));
return [m_wrapperMap jsWrapperForObject:object];
}
- (JSValue *)wrapperForJSObject:(JSValueRef)value
{
JSC::JSLockHolder locker(toJS(m_context));
return [m_wrapperMap objcWrapperForJSValueRef:value];
}
+ (JSContext *)contextWithJSGlobalContextRef:(JSGlobalContextRef)globalContext
{
JSVirtualMachine *virtualMachine = [JSVirtualMachine virtualMachineWithContextGroupRef:toRef(&toJS(globalContext)->vm())];
JSContext *context = [virtualMachine contextForGlobalContextRef:globalContext];
if (!context)
context = [[[JSContext alloc] initWithGlobalContextRef:globalContext] autorelease];
return context;
}
@end
WeakContextRef::WeakContextRef(JSContext *context)
{
objc_initWeak(&m_weakContext, context);
}
WeakContextRef::~WeakContextRef()
{
objc_destroyWeak(&m_weakContext);
}
JSContext * WeakContextRef::get()
{
return objc_loadWeak(&m_weakContext);
}
void WeakContextRef::set(JSContext *context)
{
objc_storeWeak(&m_weakContext, context);
}
#endif