compiler-rt/test/hwasan/TestCases/Linux/syscalls.cpp

   1 // RUN: %clangxx_hwasan -O0 %s -o %t && not %env_hwasan_opts=symbolize=0 %run %t 2>&1 | FileCheck %s --implicit-check-not=RETURN_FROM_TEST
   2 // RUN: %clangxx_hwasan -O3 %s -o %t && not %env_hwasan_opts=symbolize=0 %run %t 2>&1 | FileCheck %s --implicit-check-not=RETURN_FROM_TEST
   3 // RUN: %clangxx_hwasan -O0 %s -o %t && not %env_hwasan_opts=halt_on_error=0:symbolize=0 %run %t 2>&1 | FileCheck %s --implicit-check-not=RETURN_FROM_TEST --check-prefixes=CHECK,RECOVER
   4
   5 // UNSUPPORTED: android
   6
   7 #include <assert.h>
   8 #include <errno.h>
   9 #include <glob.h>
  10 #include <malloc.h>
  11 #include <stdio.h>
  12 #include <string.h>
  13
  14 #include <sanitizer/hwasan_interface.h>
  15 #include <sanitizer/linux_syscall_hooks.h>
  16
  17 /* Test the presence of __sanitizer_syscall_ in the tool runtime, and general
  18    sanity of their behaviour. */
  19
  20 int main(int argc, char *argv[]) {
  21   // lit.cfg.py currently sets 'disable_allocator_tagging=1'
  22   __hwasan_enable_allocator_tagging();
  23
  24   char *buf = (char *)malloc(1000);
  25   assert(buf != NULL);
  26
  27   __sanitizer_syscall_pre_recvmsg(0, buf - 1, 0);
  28   // CHECK: HWAddressSanitizer: tag-mismatch on address [[PTR:0x[a-f0-9]+]]
  29   // CHECK: Cause: heap-buffer-overflow
  30   // CHECK: [[PTR]] is located 1 bytes before a 1000-byte region
  31
  32   free(buf);
  33   fprintf(stderr, "RETURN_FROM_TEST\n");
  34   // RECOVER: RETURN_FROM_TEST
  35   return 0;
  36 }