static jboolean de_robv_android_xposed_XposedBridge_initNative(JNIEnv* env, jclass clazz) {
if (!keepLoadingXposed) {
ALOGE("Not initializing Xposed because of previous errors\n");
return false;
}
xposedHandleHookedMethod = env->GetStaticMethodID(xposedClass, "handleHookedMethod",
"(Ljava/lang/reflect/Member;Ljava/lang/Object;[Ljava/lang/Object;)Ljava/lang/Object;");
if (xposedHandleHookedMethod == NULL) {
ALOGE("ERROR: could not find method %s.handleHookedMethod(Method, Object, Object[])\n", XPOSED_CLASS);
dvmLogExceptionStackTrace();
env->ExceptionClear();
keepLoadingXposed = false;
return false;
}
xresourcesClass = env->FindClass(XRESOURCES_CLASS);
xresourcesClass = reinterpret_cast<jclass>(env->NewGlobalRef(xresourcesClass));
if (xresourcesClass == NULL) {
ALOGE("Error while loading XResources class '%s':\n", XRESOURCES_CLASS);
dvmLogExceptionStackTrace();
env->ExceptionClear();
keepLoadingXposed = false;
return false;
}
xresourcesTranslateResId = env->GetStaticMethodID(xresourcesClass, "translateResId",
"(ILandroid/content/res/XResources;Landroid/content/res/Resources;)I");
if (xresourcesTranslateResId == NULL) {
ALOGE("ERROR: could not find method %s.translateResId(int, Resources, Resources)\n", XRESOURCES_CLASS);
dvmLogExceptionStackTrace();
env->ExceptionClear();
keepLoadingXposed = false;
return false;
}
xresourcesTranslateAttrId = env->GetStaticMethodID(xresourcesClass, "translateAttrId",
"(Ljava/lang/String;Landroid/content/res/XResources;)I");
if (xresourcesTranslateAttrId == NULL) {
ALOGE("ERROR: could not find method %s.findAttrId(String, Resources, Resources)\n", XRESOURCES_CLASS);
dvmLogExceptionStackTrace();
env->ExceptionClear();
keepLoadingXposed = false;
return false;
}
return true;
}
bool dexspyOnVmCreated(JNIEnv* env, const char* className) {
if (!keepLoadingDexspy)
return false;
startClassName = className;
/* The following codes is commented purpose through CTS and avoid to access private fields..
** // disable some access checks
** char asmReturnTrue[] = { 0x01, 0x20, 0x70, 0x47 };
** replaceAsm((void*) &dvmCheckClassAccess, asmReturnTrue, sizeof(asmReturnTrue));
** replaceAsm((void*) &dvmCheckFieldAccess, asmReturnTrue, sizeof(asmReturnTrue));
** replaceAsm((void*) &dvmInSamePackage, asmReturnTrue, sizeof(asmReturnTrue));
** if (access(DEXSPY_DIR "do_not_hook_dvmCheckMethodAccess", F_OK) != 0)
** replaceAsm((void*) &dvmCheckMethodAccess, asmReturnTrue, sizeof(asmReturnTrue));
*/
dexspyClass = env->FindClass(DEXSPY_CLASS);
dexspyClass = reinterpret_cast<jclass>(env->NewGlobalRef(dexspyClass));
if (dexspyClass == NULL) {
ALOGE("Error while loading Dexspy class '%s':\n", DEXSPY_CLASS);
dvmLogExceptionStackTrace();
env->ExceptionClear();
return false;
}
ALOGI("Found Dexspy class '%s', now initializing\n", DEXSPY_CLASS);
register_miui_dexspy_DexspyInstaller(env);
return true;
}
/*
* public native int preloadClasses()
*/
static void Dalvik_dalvik_system_VMRuntime_preloadClasses(const u4* args,
JValue* pResult)
{
ClassObject* caller = dvmGetCallerClass(dvmThreadSelf()->curFrame);
Object* loader;
int count = 0;
unsigned int index;
UNUSED_PARAMETER(args);
if (caller == NULL)
RETURN_INT(0);
loader = (Object*)caller->classLoader;
for (index = 0; index < sizeof(preloadClassesTable)/sizeof(char*); index ++)
{
ClassObject* clazz = dvmFindClassByCstrName(preloadClassesTable[index], loader);
if (clazz == NULL)
{
dvmLogExceptionStackTrace();
dvmClearException(dvmThreadSelf());
continue;
}
count ++;
}
RETURN_INT(count);
}
bool xposedOnVmCreated(JNIEnv* env, const char* className) {
if (!keepLoadingXposed)
return false;
startClassName = className;
xposedInitMemberOffsets();
// disable some access checks
patchReturnTrue((void*) &dvmCheckClassAccess);
patchReturnTrue((void*) &dvmCheckFieldAccess);
patchReturnTrue((void*) &dvmInSamePackage);
if (access(XPOSED_DIR "do_not_hook_dvmCheckMethodAccess", F_OK) != 0)
patchReturnTrue((void*) &dvmCheckMethodAccess);
xposedClass = env->FindClass(XPOSED_CLASS);
xposedClass = reinterpret_cast<jclass>(env->NewGlobalRef(xposedClass));
if (xposedClass == NULL) {
ALOGE("Error while loading Xposed class '%s':\n", XPOSED_CLASS);
dvmLogExceptionStackTrace();
env->ExceptionClear();
return false;
}
ALOGI("Found Xposed class '%s', now initializing\n", XPOSED_CLASS);
register_de_robv_android_xposed_XposedBridge(env);
register_android_content_res_XResources(env);
return true;
}
bool xposedOnVmCreated(JNIEnv* env, const char* className) {
startClassName = className;
keepLoadingXposed = keepLoadingXposed && xposedInitMemberOffsets(env);
if (!keepLoadingXposed)
return false;
jclass miuiResourcesClass = env->FindClass(MIUI_RESOURCES_CLASS);
if (miuiResourcesClass != NULL) {
ClassObject* clazz = (ClassObject*)dvmDecodeIndirectRef(dvmThreadSelf(), miuiResourcesClass);
if (dvmIsFinalClass(clazz)) {
ALOGD("Removing final flag for class '%s'", MIUI_RESOURCES_CLASS);
clazz->accessFlags &= ~ACC_FINAL;
}
}
env->ExceptionClear();
jclass xTypedArrayClass = env->FindClass(XTYPEDARRAY_CLASS);
if (xTypedArrayClass == NULL) {
ALOGE("Error while loading XTypedArray class '%s':\n", XTYPEDARRAY_CLASS);
dvmLogExceptionStackTrace();
env->ExceptionClear();
return false;
}
xposedPrepareSubclassReplacement(xTypedArrayClass);
xposedClass = env->FindClass(XPOSED_CLASS);
xposedClass = reinterpret_cast<jclass>(env->NewGlobalRef(xposedClass));
if (xposedClass == NULL) {
ALOGE("Error while loading Xposed class '%s':\n", XPOSED_CLASS);
dvmLogExceptionStackTrace();
env->ExceptionClear();
return false;
}
ALOGI("Found Xposed class '%s', now initializing\n", XPOSED_CLASS);
if (register_de_robv_android_xposed_XposedBridge(env) != JNI_OK) {
ALOGE("Could not register natives for '%s'\n", XPOSED_CLASS);
env->ExceptionClear();
return false;
}
return true;
}
static void callMethod(Thread *self, Object *obj, Method *method)
{
JValue unused;
/* Keep track of the method we're about to call and
* the current time so that other threads can detect
* when this thread wedges and provide useful information.
*/
gDvm.gcHeap->heapWorkerInterpStartTime = dvmGetRelativeTimeUsec();
gDvm.gcHeap->heapWorkerInterpCpuStartTime = dvmGetThreadCpuTimeUsec();
gDvm.gcHeap->heapWorkerCurrentMethod = method;
gDvm.gcHeap->heapWorkerCurrentObject = obj;
/* Call the method.
*
* Don't hold the lock when executing interpreted
* code. It may suspend, and the GC needs to grab
* heapWorkerLock.
*/
dvmUnlockMutex(&gDvm.heapWorkerLock);
if (false) {
/* Log entry/exit; this will likely flood the log enough to
* cause "logcat" to drop entries.
*/
char tmpTag[16];
sprintf(tmpTag, "HW%d", self->systemTid);
LOG(LOG_DEBUG, tmpTag, "Call %s\n", method->clazz->descriptor);
dvmCallMethod(self, method, obj, &unused);
LOG(LOG_DEBUG, tmpTag, " done\n");
} else {
dvmCallMethod(self, method, obj, &unused);
}
/*
* Reacquire the heap worker lock in a suspend-friendly way.
*/
lockMutex(&gDvm.heapWorkerLock);
gDvm.gcHeap->heapWorkerCurrentObject = NULL;
gDvm.gcHeap->heapWorkerCurrentMethod = NULL;
gDvm.gcHeap->heapWorkerInterpStartTime = 0LL;
/* Exceptions thrown during these calls interrupt
* the method, but are otherwise ignored.
*/
if (dvmCheckException(self)) {
#if DVM_SHOW_EXCEPTION >= 1
LOGI("Uncaught exception thrown by finalizer (will be discarded):\n");
dvmLogExceptionStackTrace();
#endif
dvmClearException(self);
}
}
static jboolean miui_dexspy_DexspyInstaller_initNative(JNIEnv* env, jclass clazz) {
if (!keepLoadingDexspy) {
ALOGE("Not initializing Dexspy because of previous errors\n");
return false;
}
dexspyHandleHookedMethod = env->GetStaticMethodID(dexspyClass, "handleHookedMethod",
"(Ljava/lang/reflect/Member;Ljava/lang/Object;[Ljava/lang/Object;)Ljava/lang/Object;");
if (dexspyHandleHookedMethod == NULL) {
ALOGE("ERROR: could not find method %s.handleHookedMethod(Method, Object, Object[])\n", DEXSPY_CLASS);
dvmLogExceptionStackTrace();
env->ExceptionClear();
keepLoadingDexspy = false;
return false;
}
return true;
}
bool xposedOnVmCreated(JNIEnv* env, const char* className) {
startClassName = className;
keepLoadingXposed = keepLoadingXposed && xposedInitMemberOffsets(env);
if (!keepLoadingXposed)
return false;
// disable some access checks
patchReturnTrue((uintptr_t) & dvmCheckClassAccess);
patchReturnTrue((uintptr_t) & dvmCheckFieldAccess);
patchReturnTrue((uintptr_t) & dvmInSamePackage);
if (access(XPOSED_DIR "conf/do_not_hook_dvmCheckMethodAccess", F_OK) != 0)
patchReturnTrue((uintptr_t) & dvmCheckMethodAccess);
jclass miuiResourcesClass = env->FindClass(MIUI_RESOURCES_CLASS);
if (miuiResourcesClass != NULL) {
ClassObject* clazz = (ClassObject*) dvmDecodeIndirectRef(
dvmThreadSelf(), miuiResourcesClass);
if (dvmIsFinalClass(clazz)) {
ALOGD("Removing final flag for class '%s'", MIUI_RESOURCES_CLASS);
clazz->accessFlags &= ~ACC_FINAL;
}
}
env->ExceptionClear();
xposedClass = env->FindClass(XPOSED_CLASS);
xposedClass = reinterpret_cast<jclass>(env->NewGlobalRef(xposedClass));
if (xposedClass == NULL) {
ALOGE("Error while loading Xposed class '%s':\n", XPOSED_CLASS);
dvmLogExceptionStackTrace();
env->ExceptionClear();
return false;
}
ALOGI("Found Xposed class '%s', now initializing\n", XPOSED_CLASS);
if (register_de_robv_android_xposed_XposedBridge(env) != JNI_OK) {
ALOGE("Could not register natives for '%s'\n", XPOSED_CLASS);
return false;
}
return true;
}
static bool xposedInitMemberOffsets(JNIEnv* env) {
PTR_gDvmJit = dlsym(RTLD_DEFAULT, "gDvmJit");
if (PTR_gDvmJit == NULL) {
offsetMode = MEMBER_OFFSET_MODE_NO_JIT;
} else {
offsetMode = MEMBER_OFFSET_MODE_WITH_JIT;
}
ALOGD("Using structure member offsets for mode %s", xposedOffsetModesDesc[offsetMode]);
MEMBER_OFFSET_COPY(DvmJitGlobals, codeCacheFull);
int overrideCodeCacheFull = xposedReadIntConfig(XPOSED_OVERRIDE_JIT_RESET_OFFSET, -1);
if (overrideCodeCacheFull > 0 && overrideCodeCacheFull < 0x400) {
ALOGI("Offset for DvmJitGlobals.codeCacheFull is overridden, new value is 0x%x", overrideCodeCacheFull);
MEMBER_OFFSET_VAR(DvmJitGlobals, codeCacheFull) = overrideCodeCacheFull;
}
// detect offset of ArrayObject->contents
jintArray dummyArray = env->NewIntArray(1);
if (dummyArray == NULL) {
ALOGE("Could allocate int array for testing");
dvmLogExceptionStackTrace();
env->ExceptionClear();
return false;
}
jint* dummyArrayElements = env->GetIntArrayElements(dummyArray, NULL);
arrayContentsOffset = (size_t)dummyArrayElements - (size_t)dvmDecodeIndirectRef(dvmThreadSelf(), dummyArray);
env->ReleaseIntArrayElements(dummyArray,dummyArrayElements, 0);
env->DeleteLocalRef(dummyArray);
if (arrayContentsOffset < 12 || arrayContentsOffset > 128) {
ALOGE("Detected strange offset %d of ArrayObject->contents", arrayContentsOffset);
return false;
}
return true;
}
/*
* Broadcast an event to all handlers.
*/
static void broadcast(int event)
{
ClassObject* ddmServerClass;
Method* bcast;
ddmServerClass =
dvmFindClass("Lorg/apache/harmony/dalvik/ddmc/DdmServer;", NULL);
if (ddmServerClass == NULL) {
LOGW("Unable to find org.apache.harmony.dalvik.ddmc.DdmServer\n");
goto bail;
}
bcast = dvmFindDirectMethodByDescriptor(ddmServerClass, "broadcast", "(I)V");
if (bcast == NULL) {
LOGW("Unable to find DdmServer.broadcast\n");
goto bail;
}
Thread* self = dvmThreadSelf();
if (self->status != THREAD_RUNNING) {
LOGE("ERROR: DDM broadcast with thread status=%d\n", self->status);
/* try anyway? */
}
JValue unused;
dvmCallMethod(self, bcast, NULL, &unused, event);
if (dvmCheckException(self)) {
LOGI("Exception thrown by broadcast(%d)\n", event);
dvmLogExceptionStackTrace();
dvmClearException(self);
goto bail;
}
bail:
;
}
/*
* "buf" contains a full JDWP packet, possibly with multiple chunks. We
* need to process each, accumulate the replies, and ship the whole thing
* back.
*
* Returns "true" if we have a reply. The reply buffer is newly allocated,
* and includes the chunk type/length, followed by the data.
*
* TODO: we currently assume that the request and reply include a single
* chunk. If this becomes inconvenient we will need to adapt.
*/
bool dvmDdmHandlePacket(const u1* buf, int dataLen, u1** pReplyBuf,
int* pReplyLen)
{
Thread* self = dvmThreadSelf();
const int kChunkHdrLen = 8;
ArrayObject* dataArray = NULL;
bool result = false;
assert(dataLen >= 0);
/*
* Prep DdmServer. We could throw this in gDvm.
*/
ClassObject* ddmServerClass;
Method* dispatch;
ddmServerClass =
dvmFindClass("Lorg/apache/harmony/dalvik/ddmc/DdmServer;", NULL);
if (ddmServerClass == NULL) {
LOGW("Unable to find org.apache.harmony.dalvik.ddmc.DdmServer\n");
goto bail;
}
dispatch = dvmFindDirectMethodByDescriptor(ddmServerClass, "dispatch",
"(I[BII)Lorg/apache/harmony/dalvik/ddmc/Chunk;");
if (dispatch == NULL) {
LOGW("Unable to find DdmServer.dispatch\n");
goto bail;
}
/*
* Prep Chunk.
*/
int chunkTypeOff, chunkDataOff, chunkOffsetOff, chunkLengthOff;
ClassObject* chunkClass;
chunkClass = dvmFindClass("Lorg/apache/harmony/dalvik/ddmc/Chunk;", NULL);
if (chunkClass == NULL) {
LOGW("Unable to find org.apache.harmony.dalvik.ddmc.Chunk\n");
goto bail;
}
chunkTypeOff = dvmFindFieldOffset(chunkClass, "type", "I");
chunkDataOff = dvmFindFieldOffset(chunkClass, "data", "[B");
chunkOffsetOff = dvmFindFieldOffset(chunkClass, "offset", "I");
chunkLengthOff = dvmFindFieldOffset(chunkClass, "length", "I");
if (chunkTypeOff < 0 || chunkDataOff < 0 ||
chunkOffsetOff < 0 || chunkLengthOff < 0)
{
LOGW("Unable to find all chunk fields\n");
goto bail;
}
/*
* The chunk handlers are written in the Java programming language, so
* we need to convert the buffer to a byte array.
*/
dataArray = dvmAllocPrimitiveArray('B', dataLen, ALLOC_DEFAULT);
if (dataArray == NULL) {
LOGW("array alloc failed (%d)\n", dataLen);
dvmClearException(self);
goto bail;
}
memcpy(dataArray->contents, buf, dataLen);
/*
* Run through and find all chunks. [Currently just find the first.]
*/
unsigned int offset, length, type;
type = get4BE((u1*)dataArray->contents + 0);
length = get4BE((u1*)dataArray->contents + 4);
offset = kChunkHdrLen;
if (offset+length > (unsigned int) dataLen) {
LOGW("WARNING: bad chunk found (len=%u pktLen=%d)\n", length, dataLen);
goto bail;
}
/*
* Call the handler.
*/
JValue callRes;
dvmCallMethod(self, dispatch, NULL, &callRes, type, dataArray, offset,
length);
if (dvmCheckException(self)) {
LOGI("Exception thrown by dispatcher for 0x%08x\n", type);
dvmLogExceptionStackTrace();
dvmClearException(self);
goto bail;
}
Object* chunk;
ArrayObject* replyData;
chunk = (Object*) callRes.l;
if (chunk == NULL)
goto bail;
/*
* Pull the pieces out of the chunk. We copy the results into a
* newly-allocated buffer that the caller can free. We don't want to
* continue using the Chunk object because nothing has a reference to it.
* (If we do an alloc in here, we need to dvmAddTrackedAlloc it.)
*
* We could avoid this by returning type/data/offset/length and having
* the caller be aware of the object lifetime issues, but that
* integrates the JDWP code more tightly into the VM, and doesn't work
* if we have responses for multiple chunks.
*
* So we're pretty much stuck with copying data around multiple times.
*/
type = dvmGetFieldInt(chunk, chunkTypeOff);
replyData = (ArrayObject*) dvmGetFieldObject(chunk, chunkDataOff);
offset = dvmGetFieldInt(chunk, chunkOffsetOff);
length = dvmGetFieldInt(chunk, chunkLengthOff);
LOGV("DDM reply: type=0x%08x data=%p offset=%d length=%d\n",
type, replyData, offset, length);
if (length == 0 || replyData == NULL)
goto bail;
if (offset + length > replyData->length) {
LOGW("WARNING: chunk off=%d len=%d exceeds reply array len %d\n",
offset, length, replyData->length);
goto bail;
}
u1* reply;
reply = (u1*) malloc(length + kChunkHdrLen);
if (reply == NULL) {
LOGW("malloc %d failed\n", length+kChunkHdrLen);
goto bail;
}
set4BE(reply + 0, type);
set4BE(reply + 4, length);
memcpy(reply+kChunkHdrLen, (const u1*)replyData->contents + offset, length);
*pReplyBuf = reply;
*pReplyLen = length + kChunkHdrLen;
result = true;
LOGV("dvmHandleDdm returning type=%.4s buf=%p len=%d\n",
(char*) reply, reply, length);
bail:
dvmReleaseTrackedAlloc((Object*) dataArray, NULL);
return result;
}
static jboolean de_robv_android_xposed_XposedBridge_initNative(JNIEnv* env,
jclass clazz) {
if (!keepLoadingXposed) {
ALOGE("Not initializing Xposed because of previous errors\n");
return false;
}
::Thread* self = dvmThreadSelf();
xposedHandleHookedMethod =
(Method*) env->GetStaticMethodID(xposedClass, "handleHookedMethod",
"(Ljava/lang/reflect/Member;ILjava/lang/Object;Ljava/lang/Object;[Ljava/lang/Object;)Ljava/lang/Object;");
if (xposedHandleHookedMethod == NULL) {
ALOGE(
"ERROR: could not find method %s.handleHookedMethod(Member, int, Object, Object, Object[])\n",
XPOSED_CLASS);
dvmLogExceptionStackTrace();
env->ExceptionClear();
keepLoadingXposed = false;
return false;
}
Method* xposedInvokeOriginalMethodNative =
(Method*) env->GetStaticMethodID(xposedClass,
"invokeOriginalMethodNative",
"(Ljava/lang/reflect/Member;I[Ljava/lang/Class;Ljava/lang/Class;Ljava/lang/Object;[Ljava/lang/Object;)Ljava/lang/Object;");
if (xposedInvokeOriginalMethodNative == NULL) {
ALOGE(
"ERROR: could not find method %s.invokeOriginalMethodNative(Member, int, Class[], Class, Object, Object[])\n",
XPOSED_CLASS);
dvmLogExceptionStackTrace();
env->ExceptionClear();
keepLoadingXposed = false;
return false;
}
dvmSetNativeFunc(xposedInvokeOriginalMethodNative,
de_robv_android_xposed_XposedBridge_invokeOriginalMethodNative,
NULL);
objectArrayClass = dvmFindArrayClass("[Ljava/lang/Object;", NULL);
if (objectArrayClass == NULL) {
ALOGE("Error while loading Object[] class");
dvmLogExceptionStackTrace();
env->ExceptionClear();
keepLoadingXposed = false;
return false;
}
//It's not found here?
xresourcesClass = env->FindClass(XRESOURCES_CLASS);
xresourcesClass = reinterpret_cast<jclass>(env->NewGlobalRef(
xresourcesClass));
if (xresourcesClass == NULL) {
ALOGE("Error while loading XResources class '%s':\n", XRESOURCES_CLASS);
dvmLogExceptionStackTrace();
env->ExceptionClear();
keepLoadingXposed = false;
return false;
}
if (register_android_content_res_XResources(env) != JNI_OK) {
ALOGE("Could not register natives for '%s'\n", XRESOURCES_CLASS);
return false;
}
xresourcesTranslateResId =
env->GetStaticMethodID(xresourcesClass, "translateResId",
"(ILandroid/content/res/XResources;Landroid/content/res/Resources;)I");
if (xresourcesTranslateResId == NULL) {
ALOGE(
"ERROR: could not find method %s.translateResId(int, Resources, Resources)\n",
XRESOURCES_CLASS);
dvmLogExceptionStackTrace();
env->ExceptionClear();
keepLoadingXposed = false;
return false;
}
xresourcesTranslateAttrId = env->GetStaticMethodID(xresourcesClass,
"translateAttrId",
"(Ljava/lang/String;Landroid/content/res/XResources;)I");
if (xresourcesTranslateAttrId == NULL) {
ALOGE(
"ERROR: could not find method %s.findAttrId(String, Resources, Resources)\n",
XRESOURCES_CLASS);
dvmLogExceptionStackTrace();
env->ExceptionClear();
keepLoadingXposed = false;
return false;
}
return true;
}
