| 1 | /* Test that the GET_PC macro is consistent with the unwinder. |
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| 2 | Copyright (C) 2019-2024 Free Software Foundation, Inc. |
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| 3 | This file is part of the GNU C Library. |
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| 4 | |
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| 5 | The GNU C Library is free software; you can redistribute it and/or |
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| 6 | modify it under the terms of the GNU Lesser General Public License as |
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| 7 | published by the Free Software Foundation; either version 2.1 of the |
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| 8 | License, or (at your option) any later version. |
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| 9 | |
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| 10 | The GNU C Library is distributed in the hope that it will be useful, |
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 13 | Lesser General Public License for more details. |
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| 14 | |
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| 15 | You should have received a copy of the GNU Lesser General Public |
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| 16 | License along with the GNU C Library; see the file COPYING.LIB. If |
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| 17 | not, see <https://www.gnu.org/licenses/>. */ |
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| 18 | |
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| 19 | /* This test searches for the value of the GET_PC macro in the |
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| 20 | addresses obtained from the backtrace function. */ |
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| 21 | |
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| 22 | #include <array_length.h> |
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| 23 | #include <execinfo.h> |
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| 24 | #include <inttypes.h> |
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| 25 | #include <signal.h> |
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| 26 | #include <stdbool.h> |
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| 27 | #include <stdio.h> |
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| 28 | #include <support/check.h> |
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| 29 | #include <support/xsignal.h> |
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| 30 | #include <sigcontextinfo.h> |
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| 31 | |
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| 32 | static bool handler_called; |
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| 33 | |
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| 34 | static void |
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| 35 | handler (int signal, siginfo_t *info, void *ctx) |
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| 36 | { |
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| 37 | TEST_COMPARE (signal, SIGUSR1); |
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| 38 | |
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| 39 | uintptr_t pc = sigcontext_get_pc (ctx); |
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| 40 | printf (format: "info: address in signal handler: 0x%" PRIxPTR "\n" , pc); |
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| 41 | |
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| 42 | void *callstack[10]; |
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| 43 | int callstack_count = backtrace (array: callstack, array_length (callstack)); |
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| 44 | TEST_VERIFY_EXIT (callstack_count > 0); |
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| 45 | TEST_VERIFY_EXIT (callstack_count <= array_length (callstack)); |
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| 46 | bool found = false; |
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| 47 | for (int i = 0; i < callstack_count; ++i) |
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| 48 | { |
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| 49 | const char *marker; |
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| 50 | if ((uintptr_t) callstack[i] == pc) |
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| 51 | { |
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| 52 | found = true; |
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| 53 | marker = " *" ; |
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| 54 | } |
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| 55 | else |
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| 56 | marker = "" ; |
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| 57 | printf (format: "info: call stack entry %d: 0x%" PRIxPTR "%s\n" , |
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| 58 | i, (uintptr_t) callstack[i], marker); |
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| 59 | } |
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| 60 | TEST_VERIFY (found); |
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| 61 | handler_called = true; |
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| 62 | } |
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| 63 | |
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| 64 | static int |
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| 65 | do_test (void) |
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| 66 | { |
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| 67 | struct sigaction sa = |
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| 68 | { |
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| 69 | .sa_sigaction = &handler, |
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| 70 | .sa_flags = SA_SIGINFO |
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| 71 | }; |
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| 72 | xsigaction (SIGUSR1, newact: &sa, NULL); |
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| 73 | raise (SIGUSR1); |
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| 74 | TEST_VERIFY (handler_called); |
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| 75 | return 0; |
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| 76 | } |
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| 77 | |
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| 78 | #include <support/test-driver.c> |
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| 79 | |
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