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      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
     16 segv_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 
     34 int
     35 main(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