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9b254dd1 | 1 | /* Copyright 1992, 1993, 1994, 1995, 1996, 1999, 2007, 2008 |
3426d5ec MC |
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 | |
a9762ec7 JB |
8 | the Free Software Foundation; either version 3 of the License, or |
9 | (at your option) any later version. | |
3426d5ec | 10 | |
a9762ec7 JB |
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. | |
3426d5ec MC |
15 | |
16 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 17 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
3426d5ec | 18 | |
c906108c SS |
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> | |
085dd6e6 JM |
27 | #include <stdlib.h> |
28 | #include <unistd.h> | |
c906108c SS |
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 | ||
39 | char *buf1; | |
40 | char *buf2; | |
41 | ||
42 | int coremaker_data = 1; /* In Data section */ | |
43 | int coremaker_bss; /* In BSS section */ | |
44 | ||
45 | const 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 | ||
52 | void | |
53 | mmapdata () | |
54 | { | |
55 | int j, fd; | |
c906108c SS |
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 | ||
101 | void | |
102 | func2 () | |
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 | ||
128 | void | |
129 | func1 () | |
130 | { | |
131 | func2 (); | |
132 | } | |
133 | ||
085dd6e6 | 134 | int main () |
c906108c SS |
135 | { |
136 | mmapdata (); | |
137 | func1 (); | |
085dd6e6 | 138 | return 0; |
c906108c SS |
139 | } |
140 |