1/* Copyright 1992, 1993, 1994, 1995, 1996, 1999, 2007 2 Free Software Foundation, Inc. 3 4 This file is part of GDB. 5 6 This program is free software; you can redistribute it and/or modify 7 it under the terms of the GNU General Public License as published by 8 the Free Software Foundation; either version 3 of the License, or 9 (at your option) any later version. 10 11 This program is distributed in the hope that it will be useful, 12 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 GNU General Public License for more details. 15 16 You should have received a copy of the GNU General Public License 17 along with this program. If not, see <http://www.gnu.org/licenses/>. */ 18 19/* Simple little program that just generates a core dump from inside some 20 nested function calls. */ 21 22#include <stdio.h> 23#include <sys/types.h> 24#include <fcntl.h> 25#include <sys/mman.h> 26#include <signal.h> 27#include <stdlib.h> 28#include <unistd.h> 29 30#ifndef __STDC__ 31#define const /**/ 32#endif 33 34#define MAPSIZE (8 * 1024) 35 36/* Don't make these automatic vars or we will have to walk back up the 37 stack to access them. */ 38 39char *buf1; 40char *buf2; 41 42int coremaker_data = 1; /* In Data section */ 43int coremaker_bss; /* In BSS section */ 44 45const int coremaker_ro = 201; /* In Read-Only Data section */ 46 47/* Note that if the mapping fails for any reason, we set buf2 48 to -1 and the testsuite notices this and reports it as 49 a failure due to a mapping error. This way we don't have 50 to test for specific errors when running the core maker. */ 51 52void 53mmapdata () 54{ 55 int j, fd; 56 57 /* Allocate and initialize a buffer that will be used to write 58 the file that is later mapped in. */ 59 60 buf1 = (char *) malloc (MAPSIZE); 61 for (j = 0; j < MAPSIZE; ++j) 62 { 63 buf1[j] = j; 64 } 65 66 /* Write the file to map in */ 67 68 fd = open ("coremmap.data", O_CREAT | O_RDWR, 0666); 69 if (fd == -1) 70 { 71 perror ("coremmap.data open failed"); 72 buf2 = (char *) -1; 73 return; 74 } 75 write (fd, buf1, MAPSIZE); 76 77 /* Now map the file into our address space as buf2 */ 78 79 buf2 = (char *) mmap (0, MAPSIZE, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0); 80 if (buf2 == (char *) -1) 81 { 82 perror ("mmap failed"); 83 return; 84 } 85 86 /* Verify that the original data and the mapped data are identical. 87 If not, we'd rather fail now than when trying to access the mapped 88 data from the core file. */ 89 90 for (j = 0; j < MAPSIZE; ++j) 91 { 92 if (buf1[j] != buf2[j]) 93 { 94 fprintf (stderr, "mapped data is incorrect"); 95 buf2 = (char *) -1; 96 return; 97 } 98 } 99} 100 101void 102func2 () 103{ 104 int coremaker_local[5]; 105 int i; 106 107#ifdef SA_FULLDUMP 108 /* Force a corefile that includes the data section for AIX. */ 109 { 110 struct sigaction sa; 111 112 sigaction (SIGABRT, (struct sigaction *)0, &sa); 113 sa.sa_flags |= SA_FULLDUMP; 114 sigaction (SIGABRT, &sa, (struct sigaction *)0); 115 } 116#endif 117 118 /* Make sure that coremaker_local doesn't get optimized away. */ 119 for (i = 0; i < 5; i++) 120 coremaker_local[i] = i; 121 coremaker_bss = 0; 122 for (i = 0; i < 5; i++) 123 coremaker_bss += coremaker_local[i]; 124 coremaker_data = coremaker_ro + 1; 125 abort (); 126} 127 128void 129func1 () 130{ 131 func2 (); 132} 133 134int main () 135{ 136 mmapdata (); 137 func1 (); 138 return 0; 139} 140 141