[compiler-rt] [sanitizer] Disable writes to log files for binaries in a secure context. (PR #92593)

[Florian Mayer via llvm-commits]

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@@ -518,6 +522,15 @@ bool IsStateDetached(int state) {
   return state == PTHREAD_CREATE_DETACHED;
 }
 
+bool ShouldTreatRuntimeSecurely() {
+#  if SANITIZER_LINUX
+  // So we can use weak reference from sanitizer_getauxval.h
+  if (&getauxval)
+    return getauxval(/* AT_SECURE */ 23) != 0;
+#  endif
+  return getuid() != geteuid() || getgid() != getegid();
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fmayer wrote:

This is for older versions of glibc that don't have getauxval, or other posix OS that don't have it.

https://github.com/llvm/llvm-project/pull/92593