compiler-rt/test/msan/release_origin.c

   1 // RUN: %clang_msan -fsanitize-memory-track-origins=0 -O0 %s -o %t && env MSAN_OPTIONS=soft_rss_limit_mb=18:verbosity=1:allocator_may_return_null=1 %run %t 2>&1 | FileCheck %s -implicit-check-not="soft rss limit" -check-prefixes=CHECK,NOORIG
   2 // RUN: %clang_msan -fsanitize-memory-track-origins=2 -O0 %s -o %t && env MSAN_OPTIONS=soft_rss_limit_mb=36:verbosity=1:allocator_may_return_null=1 %run %t 2>&1 | FileCheck %s -implicit-check-not="soft rss limit" -check-prefixes=CHECK,ORIGIN
   3
   4 #include <assert.h>
   5 #include <sanitizer/allocator_interface.h>
   6 #include <stdio.h>
   7 #include <stdlib.h>
   8 #include <string.h>
   9 #include <unistd.h>
  10
  11 void *p;
  12
  13 int main(int argc, char **argv) {
  14   int s = 20 * 1024 * 1024;
  15   fprintf(stderr, "malloc\n");
  16   p = malloc(s);
  17   sleep(1);
  18   fprintf(stderr, "memset\n");
  19   memset(p, 1, s);
  20   sleep(1);
  21   fprintf(stderr, "free\n");
  22   free(p);
  23   sleep(1);
  24   return 0;
  25 }
  26
  27 // CHECK-LABEL: malloc
  28
  29 // Non origin mode allocate ~20M for shadow.
  30 // Origin mode allocate ~20M for shadow and ~20M for origin.
  31 // CHECK: soft rss limit exhausted
  32
  33 // CHECK-LABEL: memset
  34
  35 // Memset reserve modified pages, frees ~20M for shadow. So not change in RSS for non-origin mode.
  36 // Origin mode also frees ~20M of origins, so 'unexhausted'.
  37 // ORIGIN: soft rss limit unexhausted
  38
  39 // CHECK-LABEL: free
  40
  41 // Now non-origin release all everything.
  42 // NOORIG: soft rss limit unexhausted