compiler-rt/test/lsan/TestCases/register_root_region.cpp

   1 // Test for __lsan_(un)register_root_region().
   2 // RUN: %clangxx_lsan %s -o %t
   3 // RUN: %env_lsan_opts=use_stacks=0:use_registers=0 %run %t
   4 // RUN: %env_lsan_opts=use_stacks=0:use_registers=0 not %run %t foo 2>&1 | FileCheck %s
   5 // RUN: %env_lsan_opts=use_stacks=0:use_registers=0:use_root_regions=0 not %run %t 2>&1 | FileCheck %s
   6
   7 #include <assert.h>
   8 #include <stdio.h>
   9 #include <stdlib.h>
  10 #include <sys/mman.h>
  11 #include <unistd.h>
  12
  13 #include <sanitizer/lsan_interface.h>
  14
  15 int main(int argc, char *argv[]) {
  16   size_t size = getpagesize() * 2;
  17   void *p =
  18       mmap(0, size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANON, -1, 0);
  19   assert(p);
  20   // Make half of the memory inaccessible. LSan must not crash trying to read it.
  21   assert(0 == mprotect((char *)p + size / 2, size / 2, PROT_NONE));
  22
  23   __lsan_register_root_region(p, size);
  24   *((void **)p) = malloc(1337);
  25   fprintf(stderr, "Test alloc: %p.\n", p);
  26   if (argc > 1)
  27     __lsan_unregister_root_region(p, size);
  28   return 0;
  29 }
  30 // CHECK: Test alloc: [[ADDR:.*]].
  31 // CHECK: SUMMARY: {{(Leak|Address)}}Sanitizer: 1337 byte(s) leaked in 1 allocation(s)