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Commit | Line | Data |
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c906108c SS |
1 | /* Simple little program that just generates a core dump from inside some |
2 | nested function calls. */ | |
3 | ||
4 | #include <stdio.h> | |
5 | #include <sys/types.h> | |
6 | #include <fcntl.h> | |
7 | #include <sys/mman.h> | |
8 | #include <signal.h> | |
085dd6e6 JM |
9 | #include <stdlib.h> |
10 | #include <unistd.h> | |
c906108c SS |
11 | |
12 | #ifndef __STDC__ | |
13 | #define const /**/ | |
14 | #endif | |
15 | ||
16 | #define MAPSIZE (8 * 1024) | |
17 | ||
18 | /* Don't make these automatic vars or we will have to walk back up the | |
19 | stack to access them. */ | |
20 | ||
21 | char *buf1; | |
22 | char *buf2; | |
23 | ||
24 | int coremaker_data = 1; /* In Data section */ | |
25 | int coremaker_bss; /* In BSS section */ | |
26 | ||
27 | const int coremaker_ro = 201; /* In Read-Only Data section */ | |
28 | ||
29 | /* Note that if the mapping fails for any reason, we set buf2 | |
30 | to -1 and the testsuite notices this and reports it as | |
31 | a failure due to a mapping error. This way we don't have | |
32 | to test for specific errors when running the core maker. */ | |
33 | ||
34 | void | |
35 | mmapdata () | |
36 | { | |
37 | int j, fd; | |
c906108c SS |
38 | |
39 | /* Allocate and initialize a buffer that will be used to write | |
40 | the file that is later mapped in. */ | |
41 | ||
42 | buf1 = (char *) malloc (MAPSIZE); | |
43 | for (j = 0; j < MAPSIZE; ++j) | |
44 | { | |
45 | buf1[j] = j; | |
46 | } | |
47 | ||
48 | /* Write the file to map in */ | |
49 | ||
50 | fd = open ("coremmap.data", O_CREAT | O_RDWR, 0666); | |
51 | if (fd == -1) | |
52 | { | |
53 | perror ("coremmap.data open failed"); | |
54 | buf2 = (char *) -1; | |
55 | return; | |
56 | } | |
57 | write (fd, buf1, MAPSIZE); | |
58 | ||
59 | /* Now map the file into our address space as buf2 */ | |
60 | ||
61 | buf2 = (char *) mmap (0, MAPSIZE, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0); | |
62 | if (buf2 == (char *) -1) | |
63 | { | |
64 | perror ("mmap failed"); | |
65 | return; | |
66 | } | |
67 | ||
68 | /* Verify that the original data and the mapped data are identical. | |
69 | If not, we'd rather fail now than when trying to access the mapped | |
70 | data from the core file. */ | |
71 | ||
72 | for (j = 0; j < MAPSIZE; ++j) | |
73 | { | |
74 | if (buf1[j] != buf2[j]) | |
75 | { | |
76 | fprintf (stderr, "mapped data is incorrect"); | |
77 | buf2 = (char *) -1; | |
78 | return; | |
79 | } | |
80 | } | |
81 | } | |
82 | ||
83 | void | |
84 | func2 () | |
85 | { | |
86 | int coremaker_local[5]; | |
87 | int i; | |
88 | ||
89 | #ifdef SA_FULLDUMP | |
90 | /* Force a corefile that includes the data section for AIX. */ | |
91 | { | |
92 | struct sigaction sa; | |
93 | ||
94 | sigaction (SIGABRT, (struct sigaction *)0, &sa); | |
95 | sa.sa_flags |= SA_FULLDUMP; | |
96 | sigaction (SIGABRT, &sa, (struct sigaction *)0); | |
97 | } | |
98 | #endif | |
99 | ||
100 | /* Make sure that coremaker_local doesn't get optimized away. */ | |
101 | for (i = 0; i < 5; i++) | |
102 | coremaker_local[i] = i; | |
103 | coremaker_bss = 0; | |
104 | for (i = 0; i < 5; i++) | |
105 | coremaker_bss += coremaker_local[i]; | |
106 | coremaker_data = coremaker_ro + 1; | |
107 | abort (); | |
108 | } | |
109 | ||
110 | void | |
111 | func1 () | |
112 | { | |
113 | func2 (); | |
114 | } | |
115 | ||
085dd6e6 | 116 | int main () |
c906108c SS |
117 | { |
118 | mmapdata (); | |
119 | func1 (); | |
085dd6e6 | 120 | return 0; |
c906108c SS |
121 | } |
122 |