[wasm][test] Fix test expectation

In the mprotect case, there could be one or multiple succeeding writes
until we finally crash. Thus do not check that we never successfully
write, but just check that the last printed statement is *before* a
write.

R=jkummerow@chromium.org

Bug: v8:12226
Change-Id: I04209691a9320a9b29dd0ec364539e062ad2dc03
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3160343
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/main@{#76829}

test/unittests/wasm/memory-protection-unittest.cc

@@ -9,6 +9,7 @@
 #include <signal.h>
 #endif  // V8_OS_POSIX && !V8_OS_FUCHSIA
 
+#include "src/base/macros.h"
 #include "src/flags/flags.h"
 #include "src/wasm/code-space-access.h"
 #include "src/wasm/module-compiler.h"
@@ -230,10 +231,10 @@ class ParameterizedMemoryProtectionTestWithSignalHandling
       if (uint8_t* write_address = current_handler_scope_->code_address_) {
         // Print to the error output such that we can check against this message
         // in the ASSERT_DEATH_IF_SUPPORTED below.
-        fprintf(stderr, "Writing to %p.\n", write_address);
+        fprintf(stderr, "Writing to code.\n");
         // This write will crash if code is protected.
         *write_address = 0;
-        fprintf(stderr, "Successfully wrote to %p.\n", write_address);
+        fprintf(stderr, "Successfully wrote to code.\n");
       }
     }
 
@@ -315,10 +316,13 @@ TEST_P(ParameterizedMemoryProtectionTestWithSignalHandling, TestSignalHandler) {
           pthread_kill(pthread_self(), SIGPROF);
           base::OS::Sleep(base::TimeDelta::FromMilliseconds(10));
         } while (uses_mprotect()),  // Only loop for mprotect.
-        // Check that the subprocess tried to write, but did not succeed.
-        ::testing::AllOf(
-            ::testing::HasSubstr("Writing to"),
-            ::testing::Not(::testing::HasSubstr("Successfully wrote"))));
+    // Check that the subprocess tried to write, but did not succeed.
+#if V8_USE_ADDRESS_SANITIZER
+        ::testing::ContainsRegex(
+            "Writing to code.\nAddressSanitizer:DEADLYSIGNAL"));
+#else
+        ::testing::EndsWith("Writing to code.\n"));
+#endif  // V8_USE_ADDRESS_SANITIZER
 #endif  // GTEST_HAS_DEATH_TEST
   } else {
     base::Optional<CodeSpaceWriteScope> write_scope;