[TSan] Add support for Android

Author: airpfei

compiler-rt/lib/sanitizer_common/sanitizer_common_interceptors.inc

@@ -1287,6 +1287,22 @@ INTERCEPTOR(int, puts, char *s) {
 #if SANITIZER_INTERCEPT_PRCTL
 INTERCEPTOR(int, prctl, int option, unsigned long arg2, unsigned long arg3,
             unsigned long arg4, unsigned long arg5) {
+#  if SANITIZER_ANDROID
+  // This is a workaround to avoid the crash by leveraging compiler
+  // optimizations, which convert the code into a tail call so that
+  // no PAC-related instructions are generated.
+  // The root cause of the crash is that PR_PAC_RESET_KEYS generates
+  // a new PAC key. As a result, paciasp and autiasp use different
+  // keys, leading to the crash.
+  // However, this workaround does not prevent the crash in debug
+  // builds, since compiler optimizations are disabled and the
+  // function is not converted into a tail call.
+  static const int PR_PAC_RESET_KEYS = 54;
+  if (option == PR_PAC_RESET_KEYS) {
+    return REAL(prctl)(option, arg2, arg3, arg4, arg5);
+  }
+#  endif
+
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, prctl, option, arg2, arg3, arg4, arg5);
   static const int PR_SET_NAME = 15;

compiler-rt/lib/tsan/rtl/tsan_interceptors_posix.cpp

@@ -2411,7 +2411,7 @@ TSAN_INTERCEPTOR(int, vfork, int fake) {
 }
 #endif
 
-#if SANITIZER_LINUX
+#if SANITIZER_LINUX && !SANITIZER_ANDROID
 TSAN_INTERCEPTOR(int, clone, int (*fn)(void *), void *stack, int flags,
                  void *arg, int *parent_tid, void *tls, pid_t *child_tid) {
   SCOPED_INTERCEPTOR_RAW(clone, fn, stack, flags, arg, parent_tid, tls,
@@ -3120,7 +3120,7 @@ void InitializeInterceptors() {
 
   TSAN_INTERCEPT(fork);
   TSAN_INTERCEPT(vfork);
-#if SANITIZER_LINUX
+#if SANITIZER_LINUX && !SANITIZER_ANDROID
   TSAN_INTERCEPT(clone);
 #endif
 #if !SANITIZER_ANDROID

compiler-rt/lib/tsan/rtl/tsan_rtl_thread.cpp

@@ -188,10 +188,14 @@ void ThreadStart(ThreadState *thr, Tid tid, ThreadID os_id,
   }
 #endif
 
-#if !SANITIZER_GO
+#if !SANITIZER_GO && !SANITIZER_ANDROID
   // Don't imitate stack/TLS writes for the main thread,
   // because its initialization is synchronized with all
   // subsequent threads anyway.
+  // Because thr is created by MmapOrDie, the thr object
+  // is not in tls, the pointer of thr object is in
+  // TLS_SLOT_SANITIZER slot. So skip this check on
+  // Android platform.
   if (tid != kMainTid) {
     if (stk_addr && stk_size) {
       const uptr pc = StackTrace::GetNextInstructionPc(