compiler-rt/test/hwasan/TestCases/Linux/pvalloc-overflow.cpp

   1 // RUN: %clangxx_hwasan -O0 %s -o %t
   2 // RUN: %env_hwasan_opts=allocator_may_return_null=0 not %run %t m1 2>&1 | FileCheck %s
   3 // RUN: %env_hwasan_opts=allocator_may_return_null=1     %run %t m1 2>&1 | FileCheck %s --check-prefix=CHECK-NULL
   4 // RUN: %env_hwasan_opts=allocator_may_return_null=0 not %run %t psm1 2>&1 | FileCheck %s
   5 // RUN: %env_hwasan_opts=allocator_may_return_null=1     %run %t psm1 2>&1 | FileCheck %s --check-prefix=CHECK-NULL
   6
   7 // UNSUPPORTED: android
   8
   9 // Checks that pvalloc overflows are caught. If the allocator is allowed to
  10 // return null, the errno should be set to ENOMEM.
  11
  12 #include <assert.h>
  13 #include <errno.h>
  14 #include <malloc.h>
  15 #include <stdint.h>
  16 #include <string.h>
  17 #include <unistd.h>
  18
  19 int main(int argc, char *argv[]) {
  20   assert(argc == 2);
  21   const char *action = argv[1];
  22
  23   const size_t page_size = sysconf(_SC_PAGESIZE);
  24
  25   void *p = nullptr;
  26   if (!strcmp(action, "m1")) {
  27     p = pvalloc((uintptr_t)-1);
  28   } else if (!strcmp(action, "psm1")) {
  29     p = pvalloc((uintptr_t)-(page_size - 1));
  30   } else {
  31     assert(0);
  32   }
  33
  34   fprintf(stderr, "errno: %d\n", errno);
  35
  36   return p != nullptr;
  37 }
  38
  39 // CHECK: {{ERROR: HWAddressSanitizer: pvalloc parameters overflow: size .* rounded up to system page size .* cannot be represented in type size_t}}
  40 // CHECK: {{#0 0x.* in .*pvalloc}}
  41 // CHECK: {{#1 0x.* in main .*pvalloc-overflow.cpp:}}
  42 // CHECK: SUMMARY: HWAddressSanitizer: pvalloc-overflow {{.*}} in main
  43
  44 // CHECK-NULL: errno: 12