[compiler-rt] [TSan] Fix deadlocks during TSan error reporting on Apple platforms (PR #151495)

[Thurston Dang via llvm-commits]

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@@ -806,65 +807,76 @@ void ReportRace(ThreadState *thr, RawShadow *shadow_mem, Shadow cur, Shadow old,
   DynamicMutexSet mset1;
   MutexSet *mset[kMop] = {&thr->mset, mset1};
 
-  // We need to lock the slot during RestoreStack because it protects
-  // the slot journal.
-  Lock slot_lock(&ctx->slots[static_cast<uptr>(s[1].sid())].mtx);
-  ThreadRegistryLock l0(&ctx->thread_registry);
-  Lock slots_lock(&ctx->slot_mtx);
-  if (SpuriousRace(old))
-    return;
-  if (!RestoreStack(EventType::kAccessExt, s[1].sid(), s[1].epoch(), addr1,
-                    size1, typ1, &tids[1], &traces[1], mset[1], &tags[1])) {
-    StoreShadow(&ctx->last_spurious_race, old.raw());
-    return;
-  }
+  ScopedReport *_rep = (ScopedReport *)__builtin_alloca(sizeof(ScopedReport));
+  // Take a new scope as Swift symbolizer the below locks released before
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thurstond wrote:

Grammar

https://github.com/llvm/llvm-project/pull/151495