1
2#include <stdlib.h>
3#include <sys/types.h>
4
5#include <limits.h>
6#include <signal.h>
7
8#define TEST_NAME "sodium_utils3"
9#include "cmptest.h"
10
11#ifdef __SANITIZE_ADDRESS__
12# warning The sodium_utils3 test is expected to fail with address sanitizer
13#endif
14
15__attribute__((noreturn)) static void
16segv_handler(int sig)
17{
18    (void) sig;
19
20    printf("Intentional segfault / bus error caught\n");
21    printf("OK\n");
22#ifdef SIGSEGV
23    signal(SIGSEGV, SIG_DFL);
24#endif
25#ifdef SIGBUS
26    signal(SIGBUS, SIG_DFL);
27#endif
28#ifdef SIGABRT
29    signal(SIGABRT, SIG_DFL);
30#endif
31    exit(0);
32}
33
34int
35main(void)
36{
37    void * buf;
38    size_t size;
39
40#ifdef SIGSEGV
41    signal(SIGSEGV, segv_handler);
42#endif
43#ifdef SIGBUS
44    signal(SIGBUS, segv_handler);
45#endif
46#ifdef SIGABRT
47    signal(SIGABRT, segv_handler);
48#endif
49    size = 1U + randombytes_uniform(100000U);
50    buf  = sodium_malloc(size);
51    assert(buf != NULL);
52
53/* old versions of asan emit a warning because they don't support mlock*() */
54#ifndef __SANITIZE_ADDRESS__
55    sodium_mprotect_noaccess(buf);
56    sodium_mprotect_readwrite(buf);
57#endif
58
59#if defined(HAVE_CATCHABLE_SEGV) && !defined(__EMSCRIPTEN__) && !defined(__SANITIZE_ADDRESS__)
60    sodium_memzero(((unsigned char *) buf) - 8, 8U);
61    sodium_mprotect_readonly(buf);
62    sodium_free(buf);
63    printf("Underflow not caught\n");
64#else
65    segv_handler(0);
66#endif
67    return 0;
68}
69