Revert 230419, 230425, 230432.

They don't build on Windows.
http://lab.llvm.org:8011/builders/sanitizer-windows/ went red for example.

llvm-svn: 230461

compiler-rt/lib/asan/asan_suppressions.cc

@@ -31,22 +31,11 @@ static const char *kSuppressionTypes[] = {
     kInterceptorName, kInterceptorViaFunction, kInterceptorViaLibrary,
     kODRViolation};
 
-#if SANITIZER_SUPPORTS_WEAK_HOOKS
-extern "C" {
-SANITIZER_INTERFACE_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE
-const char *__asan_default_suppressions();
-}  // extern "C"
-#endif  // SANITIZER_SUPPORTS_WEAK_HOOKS
-
 void InitializeSuppressions() {
   CHECK_EQ(nullptr, suppression_ctx);
   suppression_ctx = new (suppression_placeholder)  // NOLINT
       SuppressionContext(kSuppressionTypes, ARRAY_SIZE(kSuppressionTypes));
   suppression_ctx->ParseFromFile(flags()->suppressions);
-#if SANITIZER_SUPPORTS_WEAK_HOOKS
-  if (&__asan_default_suppressions)
-    suppression_ctx->Parse(__asan_default_suppressions());
-#endif  // SANITIZER_SUPPORTS_WEAK_HOOKS
 }
 
 bool IsInterceptorSuppressed(const char *interceptor_name) {

compiler-rt/lib/asan/asan_win.cc

@@ -44,7 +44,6 @@ void __asan_default_on_error() {}
 #pragma comment(linker, "/alternatename:___sanitizer_malloc_hook=___sanitizer_default_malloc_hook")  // NOLINT
 #pragma comment(linker, "/alternatename:___sanitizer_free_hook=___sanitizer_default_free_hook")      // NOLINT
 #pragma comment(linker, "/alternatename:___asan_default_options=___asan_default_default_options")    // NOLINT
-#pragma comment(linker, "/alternatename:___asan_default_suppressions=___asan_default_default_suppressions")    // NOLINT
 #pragma comment(linker, "/alternatename:___asan_on_error=___asan_default_on_error")                  // NOLINT
 }  // extern "C"
 

compiler-rt/test/asan/TestCases/Linux/asan_default_suppressions.cc

@@ -1,7 +0,0 @@
-// Test that we use the suppressions from __asan_default_suppressions.
-// RUN: %clangxx_asan %s -o %t && not %run %t 2>&1 | FileCheck %s
-extern "C" {
-  const char *__asan_default_suppressions() { return "FooBar"; }
-}
-// CHECK: AddressSanitizer: failed to parse suppressions
-int main() {}