[compiler-rt] [asan] Replace SetTLSFakeStack with ResetTLSFakeStack (PR #163481)

[Florian Mayer via llvm-commits]

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@@ -214,35 +214,42 @@ void FakeStack::ForEachFakeFrame(RangeIteratorCallback callback, void *arg) {
 #if (SANITIZER_LINUX && !SANITIZER_ANDROID) || SANITIZER_FUCHSIA
 static THREADLOCAL FakeStack *fake_stack_tls;
 
-FakeStack *GetTLSFakeStack() {
-  return fake_stack_tls;
-}
-void SetTLSFakeStack(FakeStack *fs) {
-  fake_stack_tls = fs;
-}
+static FakeStack* GetTLSFakeStack() { return fake_stack_tls; }
+static void SetTLSFakeStack(FakeStack* fs) { fake_stack_tls = fs; }
+void ResetTLSFakeStack() { fake_stack_tls = nullptr; }
 #else
-FakeStack *GetTLSFakeStack() { return 0; }
-void SetTLSFakeStack(FakeStack *fs) { }
+static FakeStack* GetTLSFakeStack() { return nullptr; }
+static void SetTLSFakeStack(FakeStack*) {}
+void ResetTLSFakeStack() {}
 #endif  // (SANITIZER_LINUX && !SANITIZER_ANDROID) || SANITIZER_FUCHSIA
 
-static FakeStack *GetFakeStack() {
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fmayer wrote:

maybe do these NFC formatting changes separately?

https://github.com/llvm/llvm-project/pull/163481