compiler-rt/test/scudo/interface.cpp

   1 // RUN: %clangxx_scudo %s -lstdc++ -o %t
   2 // RUN:                                                   %run %t ownership          2>&1
   3 // RUN:                                                   %run %t ownership-and-size 2>&1
   4 // RUN:                                                   %run %t heap-size          2>&1
   5 // RUN: %env_scudo_opts="allocator_may_return_null=1"     %run %t soft-limit         2>&1
   6 // RUN: %env_scudo_opts="allocator_may_return_null=1" not %run %t hard-limit         2>&1
   7
   8 // Tests that the sanitizer interface functions behave appropriately.
   9
  10 #include <assert.h>
  11 #include <stdlib.h>
  12 #include <string.h>
  13 #include <unistd.h>
  14
  15 #include <vector>
  16
  17 #include <sanitizer/allocator_interface.h>
  18 #include <sanitizer/scudo_interface.h>
  19
  20 int main(int argc, char **argv) {
  21   assert(argc == 2);
  22
  23   if (!strcmp(argv[1], "ownership")) {
  24     // Ensures that __sanitizer_get_ownership can be called before any other
  25     // allocator function, and that it behaves properly on a pointer not owned
  26     // by us.
  27     assert(!__sanitizer_get_ownership(argv));
  28   }
  29   if (!strcmp(argv[1], "ownership-and-size")) {
  30     // Tests that __sanitizer_get_ownership and __sanitizer_get_allocated_size
  31     // behave properly on chunks allocated by the Primary and Secondary.
  32     void *p;
  33     std::vector<ssize_t> sizes{1, 8, 16, 32, 1024, 32768,
  34                                1 << 16, 1 << 17, 1 << 20, 1 << 24};
  35     for (size_t size : sizes) {
  36       p = malloc(size);
  37       assert(p);
  38       assert(__sanitizer_get_ownership(p));
  39       assert(__sanitizer_get_allocated_size(p) >= size);
  40       free(p);
  41     }
  42   }
  43   if (!strcmp(argv[1], "heap-size")) {
  44     // Ensures that __sanitizer_get_heap_size can be called before any other
  45     // allocator function.
  46     assert(__sanitizer_get_heap_size() >= 0);
  47   }
  48   if (!strcmp(argv[1], "soft-limit")) {
  49     // Verifies that setting the soft RSS limit at runtime works as expected.
  50     std::vector<void *> pointers;
  51     size_t size = 1 << 19; // 512Kb
  52     for (int i = 0; i < 5; i++) {
  53       void *p = malloc(size);
  54       memset(p, 0, size);
  55       pointers.push_back(p);
  56     }
  57     // Set the soft RSS limit to 1Mb.
  58     __scudo_set_rss_limit(1, 0);
  59     usleep(20000);
  60     // The following allocation should return NULL.
  61     void *p = malloc(size);
  62     assert(!p);
  63     // Remove the soft RSS limit.
  64     __scudo_set_rss_limit(0, 0);
  65     // The following allocation should succeed.
  66     p = malloc(size);
  67     assert(p);
  68     free(p);
  69     while (!pointers.empty()) {
  70       free(pointers.back());
  71       pointers.pop_back();
  72     }
  73   }
  74   if (!strcmp(argv[1], "hard-limit")) {
  75     // Verifies that setting the hard RSS limit at runtime works as expected.
  76     std::vector<void *> pointers;
  77     size_t size = 1 << 19; // 512Kb
  78     for (int i = 0; i < 5; i++) {
  79       void *p = malloc(size);
  80       memset(p, 0, size);
  81       pointers.push_back(p);
  82     }
  83     // Set the hard RSS limit to 1Mb
  84     __scudo_set_rss_limit(1, 1);
  85     usleep(20000);
  86     // The following should trigger our death.
  87     void *p = malloc(size);
  88   }
  89
  90   return 0;
  91 }