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Fix parasitic manager launch on EMUI/HarmonyOS#748

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Merged
JingMatrix merged 3 commits into from
Jul 30, 2026
Merged

Fix parasitic manager launch on EMUI/HarmonyOS #748

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6af9f15
Evict a pre-cached LoadedApk before binding the parasitic manager
yunsmall Jul 30, 2026
2f8b403
Evict a pre-cached LoadedApk before binding the parasitic manager
yunsmall Jul 30, 2026
3a5ef65
Rewrap the eviction KDoc after EMUI was dropped
JingMatrix Jul 30, 2026
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31 changes: 30 additions & 1 deletion zygisk/src/main/kotlin/org/matrix/vector/ParasiticManagerHooker.kt
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Original file line numberDiff line numberDiff line change
Expand Up@@ -146,6 +146,34 @@ object ParasiticManagerHooker {
.onFailure { Utils.logW("Could not send binder to LSPosed Manager", it) }
}

/**
* Drops any [LoadedApk] the process already holds for [packageName].
*
* Some OEM ROMs, reported on HarmonyOS, pre-warm the host process, so a `LoadedApk` built from
* the stock host APK can already be cached when `bindApplication` arrives.
* `ActivityThread#getPackageInfo` would then return that instance and keep its original
* `ApplicationInfo`: its only repair path is guarded by `isLoadedApkResourceDirsUpToDate`,
* which compares nothing but the resource and overlay directories, and those we copy from the
* host in [getManagerPkgInfo]. The manager's `sourceDir` would never be picked up.
*
* A freshly forked process has an empty cache, which makes this a no-op on most devices. The
* warning below is therefore also the only evidence that such pre-warming is real.
*/
private fun evictCachedLoadedApk(packageName: String) {
runCatching {
val at = ActivityThread.currentActivityThread()
for (field in arrayOf("mPackages", "mResourcePackages")) {
val cache = XposedHelpers.getObjectField(at, field) as? ArrayMap<*, *>
if (cache == null) {
Utils.logW("ActivityThread#$field is not an ArrayMap, not evicting")
} else if (cache.remove(packageName) != null) {
Utils.logW("Evicted a pre-cached LoadedApk of $packageName from $field")
}
}
}
.onFailure { logE("Failed to evict the cached LoadedApk of $packageName", it) }
}

private fun hookForManager(managerService: ILSPManagerService) {
// Hook 1: Swap ApplicationInfo during host binding
XposedHelpers.findAndHookMethod(
Expand All@@ -158,7 +186,8 @@ object ParasiticManagerHooker {
val bindData = param.args[0]
val hostAppInfo =
XposedHelpers.getObjectField(bindData, "appInfo") as ApplicationInfo
val parasiticInfo = getManagerPkgInfo(hostAppInfo)?.applicationInfo
val parasiticInfo = getManagerPkgInfo(hostAppInfo)?.applicationInfo ?: return
evictCachedLoadedApk(hostAppInfo.packageName)
XposedHelpers.setObjectField(bindData, "appInfo", parasiticInfo)
}
},
Expand Down