/*
* Convert an array of char* into a String[].
*
* Returns NULL on failure, with an exception raised.
*/
static ArrayObject* convertStringArray(char** strings, size_t count)
{
Thread* self = dvmThreadSelf();
/*
* Allocate an array to hold the String objects.
*/
ClassObject* stringArrayClass =
dvmFindArrayClass("[Ljava/lang/String;", NULL);
if (stringArrayClass == NULL) {
/* shouldn't happen */
LOGE("Unable to find [Ljava/lang/String;\n");
dvmAbort();
}
ArrayObject* stringArray =
dvmAllocArrayByClass(stringArrayClass, count, ALLOC_DEFAULT);
if (stringArray == NULL) {
/* probably OOM */
LOGD("Failed allocating array of %d strings\n", count);
assert(dvmCheckException(self));
return NULL;
}
/*
* Create the individual String objects and add them to the array.
*/
size_t i;
for (i = 0; i < count; i++) {
Object *str =
(Object *)dvmCreateStringFromCstr(strings[i]);
if (str == NULL) {
/* probably OOM; drop out now */
assert(dvmCheckException(self));
dvmReleaseTrackedAlloc((Object*)stringArray, self);
return NULL;
}
dvmSetObjectArrayElement(stringArray, i, str);
/* stored in tracked array, okay to release */
dvmReleaseTrackedAlloc(str, self);
}
dvmReleaseTrackedAlloc((Object*)stringArray, self);
return stringArray;
}
static bool initClassReference(ClassObject** pClass, const char* name) {
ClassObject* result;
assert(*pClass == NULL);
if (name[0] == '[') {
result = dvmFindArrayClass(name, NULL);
} else {
result = dvmFindSystemClassNoInit(name);
}
if (result == NULL) {
ALOGE("Could not find essential class %s", name);
return false;
}
*pClass = result;
return true;
}
/*
* Find the named class object. We have to trim "*pSignature" down to just
* the first token, do the lookup, and then restore anything important
* that we've stomped on.
*
* "pSig" will be advanced to the start of the next token.
*/
static ClassObject* convertSignaturePartToClass(char** pSignature,
const ClassObject* defClass)
{
ClassObject* clazz = NULL;
char* signature = *pSignature;
if (*signature == '[') {
/* looks like "[[[Landroid/debug/Stuff;"; we want the whole thing */
char savedChar;
while (*++signature == '[')
;
if (*signature == 'L') {
while (*++signature != ';')
;
}
/* advance past ';', and stomp on whatever comes next */
savedChar = *++signature;
*signature = '\0';
clazz = dvmFindArrayClass(*pSignature, defClass->classLoader);
*signature = savedChar;
} else if (*signature == 'L') {
/* looks like 'Landroid/debug/Stuff;"; we want the whole thing */
char savedChar;
while (*++signature != ';')
;
savedChar = *++signature;
*signature = '\0';
clazz = dvmFindClassNoInit(*pSignature, defClass->classLoader);
*signature = savedChar;
} else {
clazz = dvmFindPrimitiveClass(*signature++);
}
if (clazz == NULL) {
ALOGW("Unable to match class for part: '%s'", *pSignature);
}
*pSignature = signature;
return clazz;
}
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;
}
/*
* Cache pointers to some of the exception classes we use locally.
*
* Note this is NOT called during dexopt optimization. Some of the fields
* are initialized by the verifier (dvmVerifyCodeFlow).
*/
bool dvmExceptionStartup(void)
{
gDvm.classJavaLangThrowable =
dvmFindSystemClassNoInit("Ljava/lang/Throwable;");
gDvm.classJavaLangRuntimeException =
dvmFindSystemClassNoInit("Ljava/lang/RuntimeException;");
gDvm.classJavaLangStackOverflowError =
dvmFindSystemClassNoInit("Ljava/lang/StackOverflowError;");
gDvm.classJavaLangError =
dvmFindSystemClassNoInit("Ljava/lang/Error;");
gDvm.classJavaLangStackTraceElement =
dvmFindSystemClassNoInit("Ljava/lang/StackTraceElement;");
gDvm.classJavaLangStackTraceElementArray =
dvmFindArrayClass("[Ljava/lang/StackTraceElement;", NULL);
if (gDvm.classJavaLangThrowable == NULL ||
gDvm.classJavaLangStackTraceElement == NULL ||
gDvm.classJavaLangStackTraceElementArray == NULL)
{
LOGE("Could not find one or more essential exception classes\n");
return false;
}
/*
* Find the constructor. Note that, unlike other saved method lookups,
* we're using a Method* instead of a vtable offset. This is because
* constructors don't have vtable offsets. (Also, since we're creating
* the object in question, it's impossible for anyone to sub-class it.)
*/
Method* meth;
meth = dvmFindDirectMethodByDescriptor(gDvm.classJavaLangStackTraceElement,
"<init>", "(Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;I)V");
if (meth == NULL) {
LOGE("Unable to find constructor for StackTraceElement\n");
return false;
}
gDvm.methJavaLangStackTraceElement_init = meth;
/* grab an offset for the stackData field */
gDvm.offJavaLangThrowable_stackState =
dvmFindFieldOffset(gDvm.classJavaLangThrowable,
"stackState", "Ljava/lang/Object;");
if (gDvm.offJavaLangThrowable_stackState < 0) {
LOGE("Unable to find Throwable.stackState\n");
return false;
}
/* and one for the message field, in case we want to show it */
gDvm.offJavaLangThrowable_message =
dvmFindFieldOffset(gDvm.classJavaLangThrowable,
"detailMessage", "Ljava/lang/String;");
if (gDvm.offJavaLangThrowable_message < 0) {
LOGE("Unable to find Throwable.detailMessage\n");
return false;
}
/* and one for the cause field, just 'cause */
gDvm.offJavaLangThrowable_cause =
dvmFindFieldOffset(gDvm.classJavaLangThrowable,
"cause", "Ljava/lang/Throwable;");
if (gDvm.offJavaLangThrowable_cause < 0) {
LOGE("Unable to find Throwable.cause\n");
return false;
}
return true;
}
