tsan: ignore interceptors in few more places

[dvyukov]

Summary

This is preparation to switching to the sanitizer_common Mutex.
Without this change after the switch we will start failing
on existing from the runtime with runtime mutexes held.
Previously it worked because CheckNoLocks did not see sanitizer_common mutexes.

Depends on D106547.

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

static int setup_at_exit_wrapper(ThreadState *thr, uptr pc, void(*f)(),
   ThreadIgnoreBegin(thr, pc);
   int res;
   if (!dso) {
     // NetBSD does not preserve the 2nd argument if dso is equal to 0
     // Store ctx in a local stack-like structure
 
     // Ensure thread-safety.
     BlockingMutexLock l(&interceptor_ctx()->atexit_mu);
+    // __cxa_atexit calls calloc. If we don't ignore interceptors, we will fail
+    // due to atexit_mu held on exit from the calloc interceptor.
+    ScopedIgnoreInterceptors ignore;
 
     res = REAL(__cxa_atexit)((void (*)(void *a))at_exit_wrapper, 0, 0);
     // Push AtExitCtx on the top of the stack of callback functions
     if (!res) {
       interceptor_ctx()->AtExitStack.PushBack(ctx);
     }
   } else {
     res = REAL(__cxa_atexit)(cxa_at_exit_wrapper, ctx, dso);

compiler-rt/lib/tsan/tests/unit/tsan_sync_test.cpp

TEST(MetaMap, FreeRange) {
   m->FreeRange(thr->proc(), (uptr)&block[0], 4 * sizeof(u64));
   mb1 = m->GetBlock((uptr)&block[0]);
   EXPECT_EQ(mb1, (MBlock*)0);
   mb2 = m->GetBlock((uptr)&block[1]);
   EXPECT_EQ(mb2, (MBlock*)0);
 }
 
 TEST(MetaMap, Sync) {
+  // EXPECT can call memset/etc. Disable interceptors to prevent
+  // them from detecting that we exit runtime with mutexes held.
+  ScopedIgnoreInterceptors ignore;
   ThreadState *thr = cur_thread();
   MetaMap *m = &ctx->metamap;
   u64 block[4] = {};  // fake malloc block
   m->AllocBlock(thr, 0, (uptr)&block[0], 4 * sizeof(u64));
   SyncVar *s1 = m->GetIfExistsAndLock((uptr)&block[0], true);
   EXPECT_EQ(s1, (SyncVar*)0);
   s1 = m->GetOrCreateAndLock(thr, 0, (uptr)&block[0], true);
   EXPECT_NE(s1, (SyncVar*)0);
   EXPECT_EQ(s1->addr, (uptr)&block[0]);
   s1->mtx.Unlock();
   SyncVar *s2 = m->GetOrCreateAndLock(thr, 0, (uptr)&block[1], false);
   EXPECT_NE(s2, (SyncVar*)0);
   EXPECT_EQ(s2->addr, (uptr)&block[1]);
   s2->mtx.ReadUnlock();
   m->FreeBlock(thr->proc(), (uptr)&block[0]);
   s1 = m->GetIfExistsAndLock((uptr)&block[0], true);
   EXPECT_EQ(s1, (SyncVar*)0);
   s2 = m->GetIfExistsAndLock((uptr)&block[1], true);
   EXPECT_EQ(s2, (SyncVar*)0);
   m->OnProcIdle(thr->proc());
 }
 
 TEST(MetaMap, MoveMemory) {
+  ScopedIgnoreInterceptors ignore;
   ThreadState *thr = cur_thread();
   MetaMap *m = &ctx->metamap;
   u64 block1[4] = {};  // fake malloc block
   u64 block2[4] = {};  // fake malloc block
   m->AllocBlock(thr, 0, (uptr)&block1[0], 3 * sizeof(u64));
   m->AllocBlock(thr, 0, (uptr)&block1[3], 1 * sizeof(u64));
   SyncVar *s1 = m->GetOrCreateAndLock(thr, 0, (uptr)&block1[0], true);
   s1->mtx.Unlock();
TEST(MetaMap, MoveMemory) {
   s2 = m->GetIfExistsAndLock((uptr)&block2[1], true);
   EXPECT_NE(s2, (SyncVar*)0);
   EXPECT_EQ(s2->addr, (uptr)&block2[1]);
   s2->mtx.Unlock();
   m->FreeRange(thr->proc(), (uptr)&block2[0], 4 * sizeof(u64));
 }
 
 TEST(MetaMap, ResetSync) {
+  ScopedIgnoreInterceptors ignore;
   ThreadState *thr = cur_thread();
   MetaMap *m = &ctx->metamap;
   u64 block[1] = {};  // fake malloc block
   m->AllocBlock(thr, 0, (uptr)&block[0], 1 * sizeof(u64));
   SyncVar *s = m->GetOrCreateAndLock(thr, 0, (uptr)&block[0], true);
   s->Reset(thr->proc());
   s->mtx.Unlock();
   uptr sz = m->FreeBlock(thr->proc(), (uptr)&block[0]);
   EXPECT_EQ(sz, 1 * sizeof(u64));
 }
 
 }  // namespace __tsan