compiler-rt/test/msan/Linux/reexec_unlimited_stack.cpp

   1 // MSAN re-execs on unlimited stacks. We use that to verify ReExec() uses the
   2 // right path.
   3 // REQUIRES: shell
   4 // RUN: %clangxx_msan -O0 %s -o %t && ulimit -s unlimited && %run %t | FileCheck %s
   5
   6 #include <stdio.h>
   7
   8 #if !defined(__GLIBC_PREREQ)
   9 #define __GLIBC_PREREQ(a, b) 0
  10 #endif
  11
  12 #if __GLIBC_PREREQ(2, 16)
  13 #include <sys/auxv.h>
  14 #endif
  15
  16 int main() {
  17 #if __GLIBC_PREREQ(2, 16)
  18   // Make sure AT_EXECFN didn't get overwritten by re-exec.
  19   puts(reinterpret_cast<const char *>(getauxval(AT_EXECFN)));
  20 #else
  21   puts("No getauxval");
  22 #endif
  23   // CHECK-NOT: /proc/self/exe
  24 }