1/* libunwind - a platform-independent unwind library 2 Copyright (C) 2002-2003 Hewlett-Packard Co 3 Contributed by David Mosberger-Tang <davidm@hpl.hp.com> 4 5This file is part of libunwind. 6 7Permission is hereby granted, free of charge, to any person obtaining 8a copy of this software and associated documentation files (the 9"Software"), to deal in the Software without restriction, including 10without limitation the rights to use, copy, modify, merge, publish, 11distribute, sublicense, and/or sell copies of the Software, and to 12permit persons to whom the Software is furnished to do so, subject to 13the following conditions: 14 15The above copyright notice and this permission notice shall be 16included in all copies or substantial portions of the Software. 17 18THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 19EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 20MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 21NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE 22LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 23OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 24WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ 25 26/* This file tests unwinding from a constructor from within an 27 atexit() handler. */ 28 29#include <stdio.h> 30#include <stdlib.h> 31#include <unistd.h> 32 33#include <libunwind.h> 34#include "compiler.h" 35 36int verbose, errors; 37 38#define panic(args...) \ 39 { ++errors; fprintf (stderr, args); return; } 40 41class Test_Class { 42 public: 43 Test_Class (void); 44}; 45 46static Test_Class t; 47 48static void 49do_backtrace (void) 50{ 51 char name[128], off[32]; 52 unw_word_t ip, offset; 53 unw_cursor_t cursor; 54 unw_context_t uc; 55 int ret, count = 0; 56 57 unw_getcontext (&uc); 58 unw_init_local (&cursor, &uc); 59 60 do 61 { 62 unw_get_reg (&cursor, UNW_REG_IP, &ip); 63 name[0] = '\0'; 64 off[0] = '\0'; 65 if (unw_get_proc_name (&cursor, name, sizeof (name), &offset) == 0 66 && offset > 0) 67 snprintf (off, sizeof (off), "+0x%lx", (long) offset); 68 if (verbose) 69 printf (" [%lx] <%s%s>\n", (long) ip, name, off); 70 if (++count > 32) 71 panic ("FAILURE: didn't reach beginning of unwind-chain\n"); 72 } 73 while ((ret = unw_step (&cursor)) > 0); 74 75 if (ret < 0) 76 panic ("FAILURE: unw_step() returned %d\n", ret); 77} 78 79static void 80b (void) 81{ 82 do_backtrace(); 83} 84 85static void 86a (void) 87{ 88 if (verbose) 89 printf ("do_backtrace() from atexit()-handler:\n"); 90 b(); 91 if (errors) 92 abort (); /* cannot portably call exit() from an atexit() handler */ 93} 94 95Test_Class::Test_Class (void) 96{ 97 if (verbose) 98 printf ("do_backtrace() from constructor:\n"); 99 b(); 100} 101 102int 103main (int argc, char **argv UNUSED) 104{ 105 verbose = argc > 1; 106 return atexit (a); 107} 108