1 /*- 2 * Copyright (c) 2023 Dmitry Chagin <dchagin@FreeBSD.org> 3 * 4 * SPDX-License-Identifier: BSD-2-Clause 5 */ 6 #include <sys/cdefs.h> 7 __FBSDID("$FreeBSD$"); 8 9 #include <sys/param.h> 10 #include <sys/wait.h> 11 12 #include <execinfo.h> 13 #include <signal.h> 14 #include <stdio.h> 15 #include <string.h> 16 #include <unistd.h> 17 18 #include <atf-c.h> 19 20 #define BT_FUNCTIONS 10 21 22 void handler(int); 23 24 __noinline void 25 handler(int signum __unused) 26 { 27 void *addresses[BT_FUNCTIONS]; 28 char **symbols; 29 size_t n, i, match; 30 31 n = backtrace(addresses, nitems(addresses)); 32 ATF_REQUIRE(n > 1); 33 symbols = backtrace_symbols(addresses, n); 34 ATF_REQUIRE(symbols != NULL); 35 36 match = -1; 37 for (i = 0; i < n; i++) { 38 printf("%zu: %p, %s\n", i, addresses[i], symbols[i]); 39 if (strstr(symbols[i], "<main+") != NULL) 40 match = i; 41 } 42 ATF_REQUIRE(match > 0); 43 printf("match at %zu, symbols %zu\n", match, n); 44 45 } 46 47 ATF_TC_WITHOUT_HEAD(test_backtrace_sigtramp); 48 ATF_TC_BODY(test_backtrace_sigtramp, tc) 49 { 50 struct sigaction act; 51 pid_t child; 52 int status; 53 54 memset(&act, 0, sizeof(act)); 55 act.sa_handler = handler; 56 sigemptyset(&act.sa_mask); 57 sigaction(SIGUSR1, &act, NULL); 58 59 child = fork(); 60 ATF_REQUIRE(child != -1); 61 62 if (child == 0) { 63 kill(getppid(), SIGUSR1); 64 _exit(0); 65 } else 66 wait(&status); 67 } 68 69 ATF_TP_ADD_TCS(tp) 70 { 71 72 ATF_TP_ADD_TC(tp, test_backtrace_sigtramp); 73 74 return (atf_no_error()); 75 } 76