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