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 <stdlib.h>
11 #include <assert.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 {
22   assert(argc == 2);
23 
24   if (!strcmp(argv[1], "ownership")) {
25     // Ensures that __sanitizer_get_ownership can be called before any other
26     // allocator function, and that it behaves properly on a pointer not owned
27     // by us.
28     assert(!__sanitizer_get_ownership(argv));
29   }
30   if (!strcmp(argv[1], "ownership-and-size")) {
31     // Tests that __sanitizer_get_ownership and __sanitizer_get_allocated_size
32     // behave properly on chunks allocated by the Primary and Secondary.
33     void *p;
34     std::vector<ssize_t> sizes{1, 8, 16, 32, 1024, 32768,
35       1 << 16, 1 << 17, 1 << 20, 1 << 24};
36     for (size_t size : sizes) {
37       p = malloc(size);
38       assert(p);
39       assert(__sanitizer_get_ownership(p));
40       assert(__sanitizer_get_allocated_size(p) >= size);
41       free(p);
42     }
43   }
44   if (!strcmp(argv[1], "heap-size")) {
45     // Ensures that __sanitizer_get_heap_size can be called before any other
46     // allocator function.
47     assert(__sanitizer_get_heap_size() >= 0);
48   }
49   if (!strcmp(argv[1], "soft-limit")) {
50     // Verifies that setting the soft RSS limit at runtime works as expected.
51     std::vector<void *> pointers;
52     size_t size = 1 << 19;  // 512Kb
53     for (int i = 0; i < 5; i++) {
54       void *p = malloc(size);
55       memset(p, 0, size);
56       pointers.push_back(p);
57     }
58     // Set the soft RSS limit to 1Mb.
59     __scudo_set_rss_limit(1, 0);
60     usleep(20000);
61     // The following allocation should return NULL.
62     void *p = malloc(size);
63     assert(!p);
64     // Remove the soft RSS limit.
65     __scudo_set_rss_limit(0, 0);
66     // The following allocation should succeed.
67     p = malloc(size);
68     assert(p);
69     free(p);
70     while (!pointers.empty()) {
71       free(pointers.back());
72       pointers.pop_back();
73     }
74   }
75   if (!strcmp(argv[1], "hard-limit")) {
76     // Verifies that setting the hard RSS limit at runtime works as expected.
77     std::vector<void *> pointers;
78     size_t size = 1 << 19;  // 512Kb
79     for (int i = 0; i < 5; i++) {
80       void *p = malloc(size);
81       memset(p, 0, size);
82       pointers.push_back(p);
83     }
84     // Set the hard RSS limit to 1Mb
85     __scudo_set_rss_limit(1, 1);
86     usleep(20000);
87     // The following should trigger our death.
88     void *p = malloc(size);
89   }
90 
91   return 0;
92 }
93