1 #include <assert.h> 2 #include <setjmp.h> 3 #include <signal.h> 4 #include <stdio.h> 5 #include <stdlib.h> 6 7 // Regression test for bug 91162: if a client had a SEGV signal handler, 8 // and jumped to a bogus address, Valgrind would abort. With the fix, 9 // the following test runs to completion correctly. 10 11 static jmp_buf myjmpbuf; 12 13 static 14 void SIGSEGV_handler(int signum) 15 { 16 __builtin_longjmp(myjmpbuf, 1); 17 } 18 19 int main(void) 20 { 21 struct sigaction sigsegv_new, sigsegv_saved; 22 int res; 23 24 /* Install own SIGSEGV handler */ 25 sigsegv_new.sa_handler = SIGSEGV_handler; 26 sigsegv_new.sa_flags = 0; 27 #if !defined(__APPLE__) 28 sigsegv_new.sa_restorer = NULL; 29 #endif 30 res = sigemptyset( &sigsegv_new.sa_mask ); 31 assert(res == 0); 32 33 res = sigaction( SIGSEGV, &sigsegv_new, &sigsegv_saved ); 34 assert(res == 0); 35 36 if (__builtin_setjmp(myjmpbuf) == 0) { 37 // Jump to zero; will cause seg fault 38 #if defined(__powerpc64__) 39 unsigned long int fn[3]; 40 fn[0] = 0; 41 fn[1] = 0; 42 fn[2] = 0; 43 #else 44 void (*fn)(void) = 0; 45 #endif 46 ((void(*)(void)) fn) (); 47 fprintf(stderr, "Got here??\n"); 48 } else { 49 fprintf(stderr, "Signal caught, as expected\n"); 50 } 51 52 return 0; 53 } 54 55