compiler-rt/test/hwasan/TestCases/malloc_bisect.c

   1 // RUN: %clang_hwasan -O0 %s -o %t
   2 // RUN: %env_hwasan_opts=malloc_bisect_left=0,malloc_bisect_right=0          not %run %t 2>&1 | \
   3 // RUN:     FileCheck %s --check-prefix=CRASH
   4 // RUN: %env_hwasan_opts=malloc_bisect_left=1000,malloc_bisect_right=999         %run %t 2>&1
   5 // RUN: %env_hwasan_opts=malloc_bisect_left=0,malloc_bisect_right=4294967295 not %run %t 2>&1 | \
   6 // RUN:     FileCheck %s --check-prefix=CRASH
   7 // RUN: %env_hwasan_opts=malloc_bisect_left=0,malloc_bisect_right=4294967295,malloc_bisect_dump=1 not %run %t 2>&1 | \
   8 // RUN:     FileCheck %s --check-prefixes=CRASH,DUMP
   9
  10 // FIXME: Recursive call into malloc from stack->Print(). Or maybe this feature
  11 // needs to be removed. We don't use it, but it's in the hot code.
  12 // UNSUPPORTED: internal_symbolizer
  13
  14 #include <stdlib.h>
  15 #include <stdio.h>
  16 #include <sanitizer/hwasan_interface.h>
  17
  18 int main() {
  19   __hwasan_enable_allocator_tagging();
  20   // DUMP: [alloc] {{.*}} 10{{$}}
  21   // DUMP: in main{{.*}}malloc_bisect.c
  22   char * volatile p = (char*)malloc(10);
  23   // CRASH: HWAddressSanitizer: tag-mismatch on address
  24   // CRASH: in main{{.*}}malloc_bisect.c
  25   char volatile x = p[16];
  26   free(p);
  27   __hwasan_disable_allocator_tagging();
  28
  29   return 0;
  30 }