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|
/*
* Copyright (C) 2003, 2008 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 COMPUTER, 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 COMPUTER, 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 "jni_jsobject.h"
#if ENABLE(MAC_JAVA_BRIDGE)
#include "Frame.h"
#include "WebCoreFrameView.h"
#include "jni_runtime.h"
#include "jni_utility.h"
#include "ScriptController.h"
#include "runtime_object.h"
#include "runtime_root.h"
#include <interpreter/CallFrame.h>
#include <runtime/JSGlobalObject.h>
#include <runtime/JSLock.h>
#include <runtime/Completion.h>
#include <runtime/Completion.h>
#include <wtf/Assertions.h>
#include <parser/SourceProvider.h>
using WebCore::Frame;
using namespace JSC::Bindings;
using namespace JSC;
#ifdef NDEBUG
#define JS_LOG(formatAndArgs...) ((void)0)
#else
#define JS_LOG(formatAndArgs...) { \
fprintf (stderr, "%s(%p,%p): ", __PRETTY_FUNCTION__, _performJavaScriptRunLoop, CFRunLoopGetCurrent()); \
fprintf(stderr, formatAndArgs); \
}
#endif
#define UndefinedHandle 1
static CFRunLoopSourceRef _performJavaScriptSource;
static CFRunLoopRef _performJavaScriptRunLoop;
// May only be set by dispatchToJavaScriptThread().
static CFRunLoopSourceRef completionSource;
static void completedJavaScriptAccess (void *i)
{
assert (CFRunLoopGetCurrent() != _performJavaScriptRunLoop);
JSObjectCallContext *callContext = (JSObjectCallContext *)i;
CFRunLoopRef runLoop = (CFRunLoopRef)callContext->originatingLoop;
assert (CFRunLoopGetCurrent() == runLoop);
CFRunLoopStop(runLoop);
}
static pthread_once_t javaScriptAccessLockOnce = PTHREAD_ONCE_INIT;
static pthread_mutex_t javaScriptAccessLock;
static int javaScriptAccessLockCount = 0;
static void initializeJavaScriptAccessLock()
{
pthread_mutexattr_t attr;
pthread_mutexattr_init(&attr);
pthread_mutexattr_settype (&attr, PTHREAD_MUTEX_RECURSIVE);
pthread_mutex_init(&javaScriptAccessLock, &attr);
}
static inline void lockJavaScriptAccess()
{
// Perhaps add deadlock detection?
pthread_once(&javaScriptAccessLockOnce, initializeJavaScriptAccessLock);
pthread_mutex_lock(&javaScriptAccessLock);
javaScriptAccessLockCount++;
}
static inline void unlockJavaScriptAccess()
{
javaScriptAccessLockCount--;
pthread_mutex_unlock(&javaScriptAccessLock);
}
static void dispatchToJavaScriptThread(JSObjectCallContext *context)
{
// This lock guarantees that only one thread can invoke
// at a time, and also guarantees that completionSource;
// won't get clobbered.
lockJavaScriptAccess();
CFRunLoopRef currentRunLoop = CFRunLoopGetCurrent();
assert (currentRunLoop != _performJavaScriptRunLoop);
// Setup a source to signal once the invocation of the JavaScript
// call completes.
//
// FIXME: This could be a potential performance issue. Creating and
// adding run loop sources is expensive. We could create one source
// per thread, as needed, instead.
context->originatingLoop = currentRunLoop;
CFRunLoopSourceContext sourceContext = {0, context, NULL, NULL, NULL, NULL, NULL, NULL, NULL, completedJavaScriptAccess};
completionSource = CFRunLoopSourceCreate(NULL, 0, &sourceContext);
CFRunLoopAddSource(currentRunLoop, completionSource, kCFRunLoopDefaultMode);
// Wakeup JavaScript access thread and make it do it's work.
CFRunLoopSourceSignal(_performJavaScriptSource);
if (CFRunLoopIsWaiting(_performJavaScriptRunLoop))
CFRunLoopWakeUp(_performJavaScriptRunLoop);
// Wait until the JavaScript access thread is done.
CFRunLoopRun ();
CFRunLoopRemoveSource(currentRunLoop, completionSource, kCFRunLoopDefaultMode);
CFRelease (completionSource);
unlockJavaScriptAccess();
}
static void performJavaScriptAccess(void*)
{
assert (CFRunLoopGetCurrent() == _performJavaScriptRunLoop);
// Dispatch JavaScript calls here.
CFRunLoopSourceContext sourceContext;
CFRunLoopSourceGetContext (completionSource, &sourceContext);
JSObjectCallContext *callContext = (JSObjectCallContext *)sourceContext.info;
CFRunLoopRef originatingLoop = callContext->originatingLoop;
JavaJSObject::invoke (callContext);
// Signal the originating thread that we're done.
CFRunLoopSourceSignal (completionSource);
if (CFRunLoopIsWaiting(originatingLoop))
CFRunLoopWakeUp(originatingLoop);
}
// Must be called from the thread that will be used to access JavaScript.
void JavaJSObject::initializeJNIThreading() {
// Should only be called once.
ASSERT(!_performJavaScriptRunLoop);
// Assume that we can retain this run loop forever. It'll most
// likely (always?) be the main loop.
_performJavaScriptRunLoop = (CFRunLoopRef)CFRetain(CFRunLoopGetCurrent());
// Setup a source the other threads can use to signal the _runLoop
// thread that a JavaScript call needs to be invoked.
CFRunLoopSourceContext sourceContext = {0, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, performJavaScriptAccess};
_performJavaScriptSource = CFRunLoopSourceCreate(NULL, 0, &sourceContext);
CFRunLoopAddSource(_performJavaScriptRunLoop, _performJavaScriptSource, kCFRunLoopDefaultMode);
}
static bool isJavaScriptThread()
{
return (_performJavaScriptRunLoop == CFRunLoopGetCurrent());
}
jvalue JavaJSObject::invoke(JSObjectCallContext *context)
{
jvalue result;
bzero ((void *)&result, sizeof(jvalue));
if (!isJavaScriptThread()) {
// Send the call context to the thread that is allowed to
// call JavaScript.
dispatchToJavaScriptThread(context);
result = context->result;
}
else {
jlong nativeHandle = context->nativeHandle;
if (nativeHandle == UndefinedHandle || nativeHandle == 0) {
return result;
}
if (context->type == CreateNative) {
result.j = JavaJSObject::createNative(nativeHandle);
}
else {
JSObject *imp = jlong_to_impptr(nativeHandle);
if (!findProtectingRootObject(imp)) {
fprintf (stderr, "%s:%d: Attempt to access JavaScript from destroyed applet, type %d.\n", __FILE__, __LINE__, context->type);
return result;
}
switch (context->type){
case Call: {
result.l = JavaJSObject(nativeHandle).call(context->string, context->args);
break;
}
case Eval: {
result.l = JavaJSObject(nativeHandle).eval(context->string);
break;
}
case GetMember: {
result.l = JavaJSObject(nativeHandle).getMember(context->string);
break;
}
case SetMember: {
JavaJSObject(nativeHandle).setMember(context->string, context->value);
break;
}
case RemoveMember: {
JavaJSObject(nativeHandle).removeMember(context->string);
break;
}
case GetSlot: {
result.l = JavaJSObject(nativeHandle).getSlot(context->index);
break;
}
case SetSlot: {
JavaJSObject(nativeHandle).setSlot(context->index, context->value);
break;
}
case ToString: {
result.l = (jobject) JavaJSObject(nativeHandle).toString();
break;
}
case Finalize: {
JavaJSObject(nativeHandle).finalize();
break;
}
default: {
fprintf (stderr, "%s: invalid JavaScript call\n", __PRETTY_FUNCTION__);
}
}
}
context->result = result;
}
return result;
}
JavaJSObject::JavaJSObject(jlong nativeJSObject)
{
_imp = jlong_to_impptr(nativeJSObject);
ASSERT(_imp);
_rootObject = findProtectingRootObject(_imp);
ASSERT(_rootObject);
}
RootObject* JavaJSObject::rootObject() const
{
return _rootObject && _rootObject->isValid() ? _rootObject.get() : 0;
}
jobject JavaJSObject::call(jstring methodName, jobjectArray args) const
{
JS_LOG ("methodName = %s\n", JavaString(methodName).UTF8String());
RootObject* rootObject = this->rootObject();
if (!rootObject)
return 0;
// Lookup the function object.
ExecState* exec = rootObject->globalObject()->globalExec();
JSLock lock(false);
Identifier identifier(exec, JavaString(methodName));
JSValuePtr function = _imp->get(exec, identifier);
CallData callData;
CallType callType = function.getCallData(callData);
if (callType == CallTypeNone)
return 0;
// Call the function object.
ArgList argList;
getListFromJArray(exec, args, argList);
rootObject->globalObject()->startTimeoutCheck();
JSValuePtr result = JSC::call(exec, function, callType, callData, _imp, argList);
rootObject->globalObject()->stopTimeoutCheck();
return convertValueToJObject(result);
}
jobject JavaJSObject::eval(jstring script) const
{
JS_LOG ("script = %s\n", JavaString(script).UTF8String());
JSValuePtr result;
JSLock lock(false);
RootObject* rootObject = this->rootObject();
if (!rootObject)
return 0;
rootObject->globalObject()->startTimeoutCheck();
Completion completion = JSC::evaluate(rootObject->globalObject()->globalExec(), rootObject->globalObject()->globalScopeChain(), makeSource(JavaString(script)));
rootObject->globalObject()->stopTimeoutCheck();
ComplType type = completion.complType();
if (type == Normal) {
result = completion.value();
if (!result)
result = jsUndefined();
} else
result = jsUndefined();
return convertValueToJObject (result);
}
jobject JavaJSObject::getMember(jstring memberName) const
{
JS_LOG ("(%p) memberName = %s\n", _imp, JavaString(memberName).UTF8String());
RootObject* rootObject = this->rootObject();
if (!rootObject)
return 0;
ExecState* exec = rootObject->globalObject()->globalExec();
JSLock lock(false);
JSValuePtr result = _imp->get(exec, Identifier(exec, JavaString(memberName)));
return convertValueToJObject(result);
}
void JavaJSObject::setMember(jstring memberName, jobject value) const
{
JS_LOG ("memberName = %s, value = %p\n", JavaString(memberName).UTF8String(), value);
RootObject* rootObject = this->rootObject();
if (!rootObject)
return;
ExecState* exec = rootObject->globalObject()->globalExec();
JSLock lock(false);
PutPropertySlot slot;
_imp->put(exec, Identifier(exec, JavaString(memberName)), convertJObjectToValue(exec, value), slot);
}
void JavaJSObject::removeMember(jstring memberName) const
{
JS_LOG ("memberName = %s\n", JavaString(memberName).UTF8String());
RootObject* rootObject = this->rootObject();
if (!rootObject)
return;
ExecState* exec = rootObject->globalObject()->globalExec();
JSLock lock(false);
_imp->deleteProperty(exec, Identifier(exec, JavaString(memberName)));
}
jobject JavaJSObject::getSlot(jint index) const
{
#ifdef __LP64__
JS_LOG ("index = %d\n", index);
#else
JS_LOG ("index = %ld\n", index);
#endif
RootObject* rootObject = this->rootObject();
if (!rootObject)
return 0;
ExecState* exec = rootObject->globalObject()->globalExec();
JSLock lock(false);
JSValuePtr result = _imp->get(exec, index);
return convertValueToJObject(result);
}
void JavaJSObject::setSlot(jint index, jobject value) const
{
#ifdef __LP64__
JS_LOG ("index = %d, value = %p\n", index, value);
#else
JS_LOG ("index = %ld, value = %p\n", index, value);
#endif
RootObject* rootObject = this->rootObject();
if (!rootObject)
return;
ExecState* exec = rootObject->globalObject()->globalExec();
JSLock lock(false);
_imp->put(exec, (unsigned)index, convertJObjectToValue(exec, value));
}
jstring JavaJSObject::toString() const
{
JS_LOG ("\n");
RootObject* rootObject = this->rootObject();
if (!rootObject)
return 0;
JSLock lock(false);
JSObject *thisObj = const_cast<JSObject*>(_imp);
ExecState* exec = rootObject->globalObject()->globalExec();
return (jstring)convertValueToJValue (exec, thisObj, object_type, "java.lang.String").l;
}
void JavaJSObject::finalize() const
{
if (RootObject* rootObject = this->rootObject())
rootObject->gcUnprotect(_imp);
}
static PassRefPtr<RootObject> createRootObject(void* nativeHandle)
{
Frame* frame = 0;
for (NSView *view = (NSView *)nativeHandle; view; view = [view superview]) {
if ([view conformsToProtocol:@protocol(WebCoreFrameView)]) {
NSView<WebCoreFrameView> *webCoreFrameView = static_cast<NSView<WebCoreFrameView>*>(view);
frame = [webCoreFrameView _web_frame];
break;
}
}
if (!frame)
return 0;
return frame->script()->createRootObject(nativeHandle);
}
// We're either creating a 'Root' object (via a call to JavaJSObject.getWindow()), or
// another JavaJSObject.
jlong JavaJSObject::createNative(jlong nativeHandle)
{
JS_LOG ("nativeHandle = %d\n", (int)nativeHandle);
if (nativeHandle == UndefinedHandle)
return nativeHandle;
if (findProtectingRootObject(jlong_to_impptr(nativeHandle)))
return nativeHandle;
RefPtr<RootObject> rootObject = createRootObject(jlong_to_ptr(nativeHandle));
// If rootObject is !NULL We must have been called via netscape.javascript.JavaJSObject.getWindow(),
// otherwise we are being called after creating a JavaJSObject in
// JavaJSObject::convertValueToJObject().
if (rootObject) {
JSObject* globalObject = rootObject->globalObject();
// We call gcProtect here to get the object into the root object's "protect set" which
// is used to test if a native handle is valid as well as getting the root object given the handle.
rootObject->gcProtect(globalObject);
return ptr_to_jlong(globalObject);
}
return nativeHandle;
}
jobject JavaJSObject::convertValueToJObject(JSValuePtr value) const
{
JSLock lock(false);
RootObject* rootObject = this->rootObject();
if (!rootObject)
return 0;
ExecState* exec = rootObject->globalObject()->globalExec();
JNIEnv *env = getJNIEnv();
jobject result = 0;
// See section 22.7 of 'JavaScript: The Definitive Guide, 4th Edition',
// figure 22-5.
// number -> java.lang.Double
// string -> java.lang.String
// boolean -> java.lang.Boolean
// Java instance -> Java instance
// Everything else -> JavaJSObject
if (value.isNumber()) {
jclass JSObjectClass = env->FindClass ("java/lang/Double");
jmethodID constructorID = env->GetMethodID (JSObjectClass, "<init>", "(D)V");
if (constructorID != NULL) {
result = env->NewObject (JSObjectClass, constructorID, (jdouble)value.toNumber(exec));
}
} else if (value.isString()) {
UString stringValue = value.toString(exec);
JNIEnv *env = getJNIEnv();
result = env->NewString ((const jchar *)stringValue.data(), stringValue.size());
} else if (value.isBoolean()) {
jclass JSObjectClass = env->FindClass ("java/lang/Boolean");
jmethodID constructorID = env->GetMethodID (JSObjectClass, "<init>", "(Z)V");
if (constructorID != NULL) {
result = env->NewObject (JSObjectClass, constructorID, (jboolean)value.toBoolean(exec));
}
}
else {
// Create a JavaJSObject.
jlong nativeHandle;
if (value.isObject()) {
JSObject* imp = asObject(value);
// We either have a wrapper around a Java instance or a JavaScript
// object. If we have a wrapper around a Java instance, return that
// instance, otherwise create a new Java JavaJSObject with the JSObject*
// as it's nativeHandle.
if (imp->classInfo() && strcmp(imp->classInfo()->className, "RuntimeObject") == 0) {
RuntimeObjectImp* runtimeImp = static_cast<RuntimeObjectImp*>(imp);
JavaInstance *runtimeInstance = static_cast<JavaInstance *>(runtimeImp->getInternalInstance());
if (!runtimeInstance)
return 0;
return runtimeInstance->javaInstance();
}
else {
nativeHandle = ptr_to_jlong(imp);
rootObject->gcProtect(imp);
}
}
// All other types will result in an undefined object.
else {
nativeHandle = UndefinedHandle;
}
// Now create the Java JavaJSObject. Look for the JavaJSObject in it's new (Tiger)
// location and in the original Java 1.4.2 location.
jclass JSObjectClass;
JSObjectClass = env->FindClass ("sun/plugin/javascript/webkit/JSObject");
if (!JSObjectClass) {
env->ExceptionDescribe();
env->ExceptionClear();
JSObjectClass = env->FindClass ("apple/applet/JSObject");
}
jmethodID constructorID = env->GetMethodID (JSObjectClass, "<init>", "(J)V");
if (constructorID != NULL) {
result = env->NewObject (JSObjectClass, constructorID, nativeHandle);
}
}
return result;
}
JSValuePtr JavaJSObject::convertJObjectToValue(ExecState* exec, jobject theObject) const
{
// Instances of netscape.javascript.JSObject get converted back to
// JavaScript objects. All other objects are wrapped. It's not
// possible to pass primitive types from the Java to JavaScript.
// See section 22.7 of 'JavaScript: The Definitive Guide, 4th Edition',
// figure 22-4.
jobject classOfInstance = callJNIMethod<jobject>(theObject, "getClass", "()Ljava/lang/Class;");
jstring className = (jstring)callJNIMethod<jobject>(classOfInstance, "getName", "()Ljava/lang/String;");
// Only the sun.plugin.javascript.webkit.JSObject has a member called nativeJSObject. This class is
// created above to wrap internal browser objects. The constructor of this class takes the native
// pointer and stores it in this object, so that it can be retrieved below.
if (strcmp(JavaString(className).UTF8String(), "sun.plugin.javascript.webkit.JSObject") == 0) {
// Pull the nativeJSObject value from the Java instance. This is a
// pointer to the JSObject.
JNIEnv *env = getJNIEnv();
jfieldID fieldID = env->GetFieldID((jclass)classOfInstance, "nativeJSObject", "J");
if (fieldID == NULL) {
return jsUndefined();
}
jlong nativeHandle = env->GetLongField(theObject, fieldID);
if (nativeHandle == UndefinedHandle) {
return jsUndefined();
}
JSObject *imp = static_cast<JSObject*>(jlong_to_impptr(nativeHandle));
return imp;
}
JSLock lock(false);
return JavaInstance::create(theObject, _rootObject)->createRuntimeObject(exec);
}
void JavaJSObject::getListFromJArray(ExecState* exec, jobjectArray jArray, ArgList& list) const
{
JNIEnv *env = getJNIEnv();
int numObjects = jArray ? env->GetArrayLength(jArray) : 0;
for (int i = 0; i < numObjects; i++) {
jobject anObject = env->GetObjectArrayElement ((jobjectArray)jArray, i);
if (anObject) {
list.append(convertJObjectToValue(exec, anObject));
env->DeleteLocalRef (anObject);
}
else {
env->ExceptionDescribe();
env->ExceptionClear();
}
}
}
extern "C" {
jlong KJS_JSCreateNativeJSObject (JNIEnv*, jclass, jstring, jlong nativeHandle, jboolean)
{
JSObjectCallContext context;
context.type = CreateNative;
context.nativeHandle = nativeHandle;
return JavaJSObject::invoke (&context).j;
}
void KJS_JSObject_JSFinalize (JNIEnv*, jclass, jlong nativeHandle)
{
JSObjectCallContext context;
context.type = Finalize;
context.nativeHandle = nativeHandle;
JavaJSObject::invoke (&context);
}
jobject KJS_JSObject_JSObjectCall (JNIEnv*, jclass, jlong nativeHandle, jstring, jstring methodName, jobjectArray args, jboolean)
{
JSObjectCallContext context;
context.type = Call;
context.nativeHandle = nativeHandle;
context.string = methodName;
context.args = args;
return JavaJSObject::invoke (&context).l;
}
jobject KJS_JSObject_JSObjectEval (JNIEnv*, jclass, jlong nativeHandle, jstring, jstring jscript, jboolean)
{
JSObjectCallContext context;
context.type = Eval;
context.nativeHandle = nativeHandle;
context.string = jscript;
return JavaJSObject::invoke (&context).l;
}
jobject KJS_JSObject_JSObjectGetMember (JNIEnv*, jclass, jlong nativeHandle, jstring, jstring jname, jboolean)
{
JSObjectCallContext context;
context.type = GetMember;
context.nativeHandle = nativeHandle;
context.string = jname;
return JavaJSObject::invoke (&context).l;
}
void KJS_JSObject_JSObjectSetMember (JNIEnv*, jclass, jlong nativeHandle, jstring, jstring jname, jobject value, jboolean)
{
JSObjectCallContext context;
context.type = SetMember;
context.nativeHandle = nativeHandle;
context.string = jname;
context.value = value;
JavaJSObject::invoke (&context);
}
void KJS_JSObject_JSObjectRemoveMember (JNIEnv*, jclass, jlong nativeHandle, jstring, jstring jname, jboolean)
{
JSObjectCallContext context;
context.type = RemoveMember;
context.nativeHandle = nativeHandle;
context.string = jname;
JavaJSObject::invoke (&context);
}
jobject KJS_JSObject_JSObjectGetSlot (JNIEnv*, jclass, jlong nativeHandle, jstring, jint jindex, jboolean)
{
JSObjectCallContext context;
context.type = GetSlot;
context.nativeHandle = nativeHandle;
context.index = jindex;
return JavaJSObject::invoke (&context).l;
}
void KJS_JSObject_JSObjectSetSlot (JNIEnv*, jclass, jlong nativeHandle, jstring, jint jindex, jobject value, jboolean)
{
JSObjectCallContext context;
context.type = SetSlot;
context.nativeHandle = nativeHandle;
context.index = jindex;
context.value = value;
JavaJSObject::invoke (&context);
}
jstring KJS_JSObject_JSObjectToString (JNIEnv*, jclass, jlong nativeHandle)
{
JSObjectCallContext context;
context.type = ToString;
context.nativeHandle = nativeHandle;
return (jstring)JavaJSObject::invoke (&context).l;
}
}
#endif // ENABLE(MAC_JAVA_BRIDGE)
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