[TSAN][Darwin] x86_64 specific tests requiring weak symbols

[thetruestblue]

Summary

Additional tests requiring weak symbol attribute work around for macOS 12.0

[rsundahl]

LGTM. Thank you!

[thetruestblue]

Made the format consistent.

compiler-rt/test/tsan/java_symbolization.cpp

 // RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t | FileCheck %s
 #include "java.h"
 #include <memory.h>
 
-extern "C" __attribute__((disable_sanitizer_instrumentation)) void
+#if (__APPLE__)
+__attribute__((weak)) // Required for dyld macOS 12.0+
+#endif
+__attribute__((disable_sanitizer_instrumentation))
+extern "C" void
 __tsan_symbolize_external_ex(jptr pc,
                              void (*add_frame)(void *, const char *,
                                                const char *, int, int),
                              void *ctx) {
   if (pc == (1234 | kExternalPCBit)) {
     add_frame(ctx, "MyInnerFunc", "MyInnerFile.java", 1234, 56);
     add_frame(ctx, "MyOuterFunc", "MyOuterFile.java", 4321, 65);
   }

compiler-rt/test/tsan/java_symbolization_legacy.cpp

 // RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t | FileCheck %s
 #include "java.h"
 #include <memory.h>
 
-extern "C" __attribute__((disable_sanitizer_instrumentation)) bool
+#if (__APPLE__)
+__attribute__((weak)) // Required for dyld macOS 12.0+
+#endif
+__attribute__((disable_sanitizer_instrumentation))
+extern "C" bool
 __tsan_symbolize_external(jptr pc, char *func_buf, jptr func_siz,
                           char *file_buf, jptr file_siz, int *line, int *col) {
   if (pc == (1234 | kExternalPCBit)) {
     memcpy(func_buf, "MyFunc", sizeof("MyFunc"));
     memcpy(file_buf, "MyFile.java", sizeof("MyFile.java"));
     *line = 1234;
     *col = 56;
     return true;