compiler-rt/test/asan/TestCases/Linux/sanbox_read_proc_self_maps_test.cpp

   1 // REQUIRES: x86_64-target-arch
   2 // RUN: %clangxx_asan  %s -o %t
   3 // RUN: not %run %t 2>&1 | FileCheck %s
   4 #include <sanitizer/common_interface_defs.h>
   5 #include <sched.h>
   6 #include <unistd.h>
   7 #include <stdio.h>
   8 #include <stdlib.h>
   9
  10 int main() {
  11   __sanitizer_sandbox_arguments args = {0};
  12   // should cache /proc/self/maps
  13   __sanitizer_sandbox_on_notify(&args);
  14
  15   if (unshare(CLONE_NEWUSER)) {
  16     printf("unshare failed\n");
  17     return 1;
  18   }
  19
  20   // remove access to /proc/self/maps
  21   if (chroot("/tmp")) {
  22     printf("chroot failed\n");
  23     return 2;
  24   }
  25
  26   *(volatile int*)0x42 = 0;
  27 // CHECK-NOT: CHECK failed
  28 }