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Hook ReinitializeMethodsCode on A16+ #158

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Merged
yujincheng08 merged 1 commit into from
Jul 13, 2025
Merged

Hook ReinitializeMethodsCode on A16+ #158

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14 changes: 13 additions & 1 deletion lsplant/src/main/jni/art/runtime/instrumentation.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -45,14 +45,26 @@ export class Instrumentation {
backup(thiz, MaybeUseBackupMethod(art_method, quick_code), quick_code);
};

inline static auto ReinitializeMethodsCode_ =
"_ZN3art15instrumentation15Instrumentation23ReinitializeMethodsCodeEPNS_9ArtMethodE"_sym.hook->*[]
<MemBackup auto backup>
(Instrumentation *thiz, ArtMethod *art_method) static -> void {
if (IsDeoptimized(art_method)) {
LOGV("skip update entrypoint on deoptimized method %s",
art_method->PrettyMethod(true).c_str());
return;
}
backup(thiz, MaybeUseBackupMethod(art_method, nullptr));
};

public:
static bool Init(JNIEnv *env, const HookHandler &handler) {
if (!IsJavaDebuggable(env)) [[likely]] {
return true;
}
int sdk_int = GetAndroidApiLevel();
if (sdk_int >= __ANDROID_API_P__) [[likely]] {
if (!handler(InitializeMethodsCode_, UpdateMethodsCodeToInterpreterEntryPoint_)) {
if (!handler(ReinitializeMethodsCode_, InitializeMethodsCode_, UpdateMethodsCodeToInterpreterEntryPoint_)) {
return false;
}
}
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