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divestos-build/Patches/LineageOS-18.1/android_frameworks_base/0018-Exec_Based_Spawning-12.patch

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From 98634286bbdffe967a9a03442e5aa324ec26986a Mon Sep 17 00:00:00 2001
From: anupritaisno1 <www.anuprita804@gmail.com>
Date: Fri, 30 Oct 2020 22:26:09 +0000
Subject: [PATCH] pass through runtime flags for exec spawning and implement
them in the child
Signed-off-by: anupritaisno1 <www.anuprita804@gmail.com>
---
.../com/android/internal/os/ExecInit.java | 14 +++-
core/java/com/android/internal/os/Zygote.java | 9 ++
.../android/internal/os/ZygoteConnection.java | 2 +-
core/jni/com_android_internal_os_Zygote.cpp | 83 ++++++++++---------
4 files changed, 66 insertions(+), 42 deletions(-)
diff --git a/core/java/com/android/internal/os/ExecInit.java b/core/java/com/android/internal/os/ExecInit.java
index 830e5b562a91..749c67abf389 100644
--- a/core/java/com/android/internal/os/ExecInit.java
+++ b/core/java/com/android/internal/os/ExecInit.java
@@ -31,15 +31,20 @@ public static void main(String[] args) {
// Parse our mandatory argument.
int targetSdkVersion = Integer.parseInt(args[0], 10);
+ // Parse the runtime_flags.
+ int runtimeFlags = Integer.parseInt(args[1], 10);
+
// Mimic system Zygote preloading.
ZygoteInit.preload(new TimingsTraceLog("ExecInitTiming",
Trace.TRACE_TAG_DALVIK), false);
// Launch the application.
- String[] runtimeArgs = new String[args.length - 1];
- System.arraycopy(args, 1, runtimeArgs, 0, runtimeArgs.length);
+ String[] runtimeArgs = new String[args.length - 2];
+ System.arraycopy(args, 2, runtimeArgs, 0, runtimeArgs.length);
Runnable r = execInit(targetSdkVersion, runtimeArgs);
+ Zygote.nativeHandleRuntimeFlags(runtimeFlags);
+
r.run();
}
@@ -52,9 +57,9 @@ public static void main(String[] args) {
* @param args Arguments for {@link RuntimeInit#main}.
*/
public static void execApplication(String niceName, int targetSdkVersion,
- String instructionSet, String[] args) {
+ String instructionSet, int runtimeFlags, String[] args) {
int niceArgs = niceName == null ? 0 : 1;
- int baseArgs = 5 + niceArgs;
+ int baseArgs = 6 + niceArgs;
String[] argv = new String[baseArgs + args.length];
if (VMRuntime.is64BitInstructionSet(instructionSet)) {
argv[0] = "/system/bin/app_process64";
@@ -68,6 +73,7 @@ public static void execApplication(String niceName, int targetSdkVersion,
}
argv[3 + niceArgs] = "com.android.internal.os.ExecInit";
argv[4 + niceArgs] = Integer.toString(targetSdkVersion);
+ argv[5 + niceArgs] = Integer.toString(runtimeFlags);
System.arraycopy(args, 0, argv, baseArgs, args.length);
WrapperInit.preserveCapabilities();
diff --git a/core/java/com/android/internal/os/Zygote.java b/core/java/com/android/internal/os/Zygote.java
index a7d9827855a2..aa874ad98a78 100644
--- a/core/java/com/android/internal/os/Zygote.java
+++ b/core/java/com/android/internal/os/Zygote.java
@@ -1097,4 +1097,13 @@ static void appendQuotedShellArgs(StringBuilder command, String[] args) {
* fully-feature Memory Tagging, rather than the static Tagged Pointers.
*/
public static native boolean nativeSupportsTaggedPointers();
+
+ /**
+ * Used on GrapheneOS to set up runtime flags
+ *
+ * @param runtimeFlags flags to be passed to the native method
+ *
+ * @hide
+ */
+ public static native void nativeHandleRuntimeFlags(int runtimeFlags);
}
diff --git a/core/java/com/android/internal/os/ZygoteConnection.java b/core/java/com/android/internal/os/ZygoteConnection.java
index 9b4664178530..4ae69677f1dd 100644
--- a/core/java/com/android/internal/os/ZygoteConnection.java
+++ b/core/java/com/android/internal/os/ZygoteConnection.java
@@ -505,7 +505,7 @@ private Runnable handleChildProc(ZygoteArguments parsedArgs,
if (SystemProperties.getBoolean("sys.spawn.exec", true) &&
(parsedArgs.mRuntimeFlags & ApplicationInfo.FLAG_DEBUGGABLE) == 0) {
ExecInit.execApplication(parsedArgs.mNiceName, parsedArgs.mTargetSdkVersion,
- VMRuntime.getCurrentInstructionSet(), parsedArgs.mRemainingArgs);
+ VMRuntime.getCurrentInstructionSet(), parsedArgs.mRuntimeFlags, parsedArgs.mRemainingArgs);
// Should not get here.
throw new IllegalStateException("ExecInit.execApplication unexpectedly returned");
diff --git a/core/jni/com_android_internal_os_Zygote.cpp b/core/jni/com_android_internal_os_Zygote.cpp
index 9eede83e21e5..cb4bde87916b 100644
--- a/core/jni/com_android_internal_os_Zygote.cpp
+++ b/core/jni/com_android_internal_os_Zygote.cpp
@@ -1599,6 +1599,46 @@ static void BindMountStorageDirs(JNIEnv* env, jobjectArray pkg_data_info_list,
}
}
+static void HandleRuntimeFlags(JNIEnv* env, jint& runtime_flags) {
+ // Set process properties to enable debugging if required.
+ if ((runtime_flags & RuntimeFlags::DEBUG_ENABLE_JDWP) != 0) {
+ EnableDebugger();
+ }
+ if ((runtime_flags & RuntimeFlags::PROFILE_FROM_SHELL) != 0) {
+ // simpleperf needs the process to be dumpable to profile it.
+ if (prctl(PR_SET_DUMPABLE, 1, 0, 0, 0) == -1) {
+ ALOGE("prctl(PR_SET_DUMPABLE) failed: %s", strerror(errno));
+ RuntimeAbort(env, __LINE__, "prctl(PR_SET_DUMPABLE, 1) failed");
+ }
+ }
+
+ HeapTaggingLevel heap_tagging_level;
+ switch (runtime_flags & RuntimeFlags::MEMORY_TAG_LEVEL_MASK) {
+ case RuntimeFlags::MEMORY_TAG_LEVEL_TBI:
+ heap_tagging_level = M_HEAP_TAGGING_LEVEL_TBI;
+ break;
+ default:
+ heap_tagging_level = M_HEAP_TAGGING_LEVEL_NONE;
+ }
+ android_mallopt(M_SET_HEAP_TAGGING_LEVEL, &heap_tagging_level, sizeof(heap_tagging_level));
+ // Now that we've used the flag, clear it so that we don't pass unknown flags to the ART runtime.
+ runtime_flags &= ~RuntimeFlags::MEMORY_TAG_LEVEL_MASK;
+
+ bool forceEnableGwpAsan = false;
+ switch (runtime_flags & RuntimeFlags::GWP_ASAN_LEVEL_MASK) {
+ default:
+ case RuntimeFlags::GWP_ASAN_LEVEL_NEVER:
+ break;
+ case RuntimeFlags::GWP_ASAN_LEVEL_ALWAYS:
+ forceEnableGwpAsan = true;
+ [[fallthrough]];
+ case RuntimeFlags::GWP_ASAN_LEVEL_LOTTERY:
+ android_mallopt(M_INITIALIZE_GWP_ASAN, &forceEnableGwpAsan, sizeof(forceEnableGwpAsan));
+ }
+ // Now that we've used the flag, clear it so that we don't pass unknown flags to the ART runtime.
+ runtime_flags &= ~RuntimeFlags::GWP_ASAN_LEVEL_MASK;
+}
+
// Utility routine to specialize a zygote child process.
static void SpecializeCommon(JNIEnv* env, uid_t uid, gid_t gid, jintArray gids,
jint runtime_flags, jobjectArray rlimits,
@@ -1716,43 +1756,7 @@ static void SpecializeCommon(JNIEnv* env, uid_t uid, gid_t gid, jintArray gids,
}
}
- // Set process properties to enable debugging if required.
- if ((runtime_flags & RuntimeFlags::DEBUG_ENABLE_JDWP) != 0) {
- EnableDebugger();
- }
- if ((runtime_flags & RuntimeFlags::PROFILE_FROM_SHELL) != 0) {
- // simpleperf needs the process to be dumpable to profile it.
- if (prctl(PR_SET_DUMPABLE, 1, 0, 0, 0) == -1) {
- ALOGE("prctl(PR_SET_DUMPABLE) failed: %s", strerror(errno));
- RuntimeAbort(env, __LINE__, "prctl(PR_SET_DUMPABLE, 1) failed");
- }
- }
-
- HeapTaggingLevel heap_tagging_level;
- switch (runtime_flags & RuntimeFlags::MEMORY_TAG_LEVEL_MASK) {
- case RuntimeFlags::MEMORY_TAG_LEVEL_TBI:
- heap_tagging_level = M_HEAP_TAGGING_LEVEL_TBI;
- break;
- default:
- heap_tagging_level = M_HEAP_TAGGING_LEVEL_NONE;
- }
- android_mallopt(M_SET_HEAP_TAGGING_LEVEL, &heap_tagging_level, sizeof(heap_tagging_level));
- // Now that we've used the flag, clear it so that we don't pass unknown flags to the ART runtime.
- runtime_flags &= ~RuntimeFlags::MEMORY_TAG_LEVEL_MASK;
-
- bool forceEnableGwpAsan = false;
- switch (runtime_flags & RuntimeFlags::GWP_ASAN_LEVEL_MASK) {
- default:
- case RuntimeFlags::GWP_ASAN_LEVEL_NEVER:
- break;
- case RuntimeFlags::GWP_ASAN_LEVEL_ALWAYS:
- forceEnableGwpAsan = true;
- [[fallthrough]];
- case RuntimeFlags::GWP_ASAN_LEVEL_LOTTERY:
- android_mallopt(M_INITIALIZE_GWP_ASAN, &forceEnableGwpAsan, sizeof(forceEnableGwpAsan));
- }
- // Now that we've used the flag, clear it so that we don't pass unknown flags to the ART runtime.
- runtime_flags &= ~RuntimeFlags::GWP_ASAN_LEVEL_MASK;
+ HandleRuntimeFlags(env, runtime_flags);
if (NeedsNoRandomizeWorkaround()) {
// Work around ARM kernel ASLR lossage (http://b/5817320).
@@ -2441,6 +2445,10 @@ static jboolean com_android_internal_os_Zygote_nativeSupportsTaggedPointers(JNIE
#endif
}
+static void nativeHandleRuntimeFlagsWrapper(JNIEnv* env, jclass, jint runtime_flags) {
+ HandleRuntimeFlags(env, runtime_flags);
+}
+
static const JNINativeMethod gMethods[] = {
{"nativeForkAndSpecialize",
"(II[II[[IILjava/lang/String;Ljava/lang/String;[I[IZLjava/lang/String;Ljava/lang/"
@@ -2478,6 +2486,7 @@ static const JNINativeMethod gMethods[] = {
(void*)com_android_internal_os_Zygote_nativeParseSigChld},
{"nativeSupportsTaggedPointers", "()Z",
(void*)com_android_internal_os_Zygote_nativeSupportsTaggedPointers},
+ {"nativeHandleRuntimeFlags", "(I)V", (void*)nativeHandleRuntimeFlagsWrapper},
};
int register_com_android_internal_os_Zygote(JNIEnv* env) {
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