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b811d2c2 | 1 | /* Copyright 1992-2020 Free Software Foundation, Inc. |
3426d5ec MC |
2 | |
3 | This file is part of GDB. | |
4 | ||
5 | This program is free software; you can redistribute it and/or modify | |
6 | it under the terms of the GNU General Public License as published by | |
a9762ec7 JB |
7 | the Free Software Foundation; either version 3 of the License, or |
8 | (at your option) any later version. | |
3426d5ec | 9 | |
a9762ec7 JB |
10 | This program is distributed in the hope that it will be useful, |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | GNU General Public License for more details. | |
3426d5ec MC |
14 | |
15 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 16 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
3426d5ec | 17 | |
c906108c SS |
18 | /* Simple little program that just generates a core dump from inside some |
19 | nested function calls. */ | |
20 | ||
21 | #include <stdio.h> | |
22 | #include <sys/types.h> | |
23 | #include <fcntl.h> | |
24 | #include <sys/mman.h> | |
25 | #include <signal.h> | |
085dd6e6 JM |
26 | #include <stdlib.h> |
27 | #include <unistd.h> | |
a59add0c | 28 | #include <string.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); | |
41977d16 | 80 | if (buf2 == (char *) MAP_FAILED) |
c906108c SS |
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 | } | |
becf6477 PP |
99 | /* Touch buf2 so kernel writes it out into 'core'. */ |
100 | buf2[0] = buf1[0]; | |
c906108c SS |
101 | } |
102 | ||
103 | void | |
104 | func2 () | |
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 | ||
130 | void | |
131 | func1 () | |
132 | { | |
133 | func2 (); | |
134 | } | |
135 | ||
c0edd9ed JK |
136 | int |
137 | main (int argc, char **argv) | |
c906108c | 138 | { |
c0edd9ed JK |
139 | if (argc == 2 && strcmp (argv[1], "sleep") == 0) |
140 | { | |
141 | sleep (60); | |
142 | return 0; | |
143 | } | |
c906108c SS |
144 | mmapdata (); |
145 | func1 (); | |
085dd6e6 | 146 | return 0; |
c906108c | 147 | } |