1/* Copyright 1992, 1993, 1994, 1995, 1996, 1999 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 2 of the License, or (at 9 your option) any later version. 10 11 This program is distributed in the hope that it will be useful, but 12 WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 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, write to the Free Software 18 Foundation, Inc., 59 Temple Place - Suite 330, 19 Boston, MA 02111-1307, USA. */ 20 21/* Simple little program that just generates a core dump from inside some 22 nested function calls. */ 23 24#include <stdio.h> 25#include <sys/types.h> 26#include <fcntl.h> 27#include <sys/mman.h> 28#include <signal.h> 29#include <stdlib.h> 30#include <unistd.h> 31 32#ifndef __STDC__ 33#define const /**/ 34#endif 35 36#define MAPSIZE (8 * 1024) 37 38/* Don't make these automatic vars or we will have to walk back up the 39 stack to access them. */ 40 41char *buf1; 42char *buf2; 43 44int coremaker_data = 1; /* In Data section */ 45int coremaker_bss; /* In BSS section */ 46 47const int coremaker_ro = 201; /* In Read-Only Data section */ 48 49/* Note that if the mapping fails for any reason, we set buf2 50 to -1 and the testsuite notices this and reports it as 51 a failure due to a mapping error. This way we don't have 52 to test for specific errors when running the core maker. */ 53 54void 55mmapdata () 56{ 57 int j, fd; 58 59 /* Allocate and initialize a buffer that will be used to write 60 the file that is later mapped in. */ 61 62 buf1 = (char *) malloc (MAPSIZE); 63 for (j = 0; j < MAPSIZE; ++j) 64 { 65 buf1[j] = j; 66 } 67 68 /* Write the file to map in */ 69 70 fd = open ("coremmap.data", O_CREAT | O_RDWR, 0666); 71 if (fd == -1) 72 { 73 perror ("coremmap.data open failed"); 74 buf2 = (char *) -1; 75 return; 76 } 77 write (fd, buf1, MAPSIZE); 78 79 /* Now map the file into our address space as buf2 */ 80 81 buf2 = (char *) mmap (0, MAPSIZE, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0); 82 if (buf2 == (char *) -1) 83 { 84 perror ("mmap failed"); 85 return; 86 } 87 88 /* Verify that the original data and the mapped data are identical. 89 If not, we'd rather fail now than when trying to access the mapped 90 data from the core file. */ 91 92 for (j = 0; j < MAPSIZE; ++j) 93 { 94 if (buf1[j] != buf2[j]) 95 { 96 fprintf (stderr, "mapped data is incorrect"); 97 buf2 = (char *) -1; 98 return; 99 } 100 } 101} 102 103void 104func2 () 105{ 106 int coremaker_local[5]; 107 int i; 108 109#ifdef SA_FULLDUMP 110 /* Force a corefile that includes the data section for AIX. */ 111 { 112 struct sigaction sa; 113 114 sigaction (SIGABRT, (struct sigaction *)0, &sa); 115 sa.sa_flags |= SA_FULLDUMP; 116 sigaction (SIGABRT, &sa, (struct sigaction *)0); 117 } 118#endif 119 120 /* Make sure that coremaker_local doesn't get optimized away. */ 121 for (i = 0; i < 5; i++) 122 coremaker_local[i] = i; 123 coremaker_bss = 0; 124 for (i = 0; i < 5; i++) 125 coremaker_bss += coremaker_local[i]; 126 coremaker_data = coremaker_ro + 1; 127 abort (); 128} 129 130void 131func1 () 132{ 133 func2 (); 134} 135 136int main () 137{ 138 mmapdata (); 139 func1 (); 140 return 0; 141} 142 143