[compiler-rt] [compiler-rt][rtsan] Use Die instead of exit, define cf.exitcode (PR #107635)

[Chris Apple via llvm-commits]

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@@ -8,8 +8,25 @@
 //
 //===----------------------------------------------------------------------===//
 
+#include "sanitizer_common/sanitizer_platform.h"
 #include "sanitizer_test_utils.h"
 
+// Default RTSAN_OPTIONS for the unit tests.
+extern "C" const char *__rtsan_default_options() {
+#if SANITIZER_APPLE
+  // On Darwin, we default to `abort_on_error=1`, which would make tests run
+  // much slower. Let's override this and run lit tests with 'abort_on_error=0'
+  // and make sure we do not overwhelm the syslog while testing. Also, let's
+  // turn symbolization off to speed up testing, especially when not running
+  // with llvm-symbolizer but with atos.
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cjappl wrote:

This does fairly drastically speed up our unit tests. The difference is very noticeable 

https://github.com/llvm/llvm-project/pull/107635