123 lines
2.5 KiB
C
123 lines
2.5 KiB
C
/* Simple little program that just generates a core dump from inside some
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nested function calls. */
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#include <stdio.h>
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#include <sys/types.h>
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#include <fcntl.h>
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#include <sys/mman.h>
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#include <signal.h>
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#include <stdlib.h>
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#include <unistd.h>
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#ifndef __STDC__
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#define const /**/
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#endif
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#define MAPSIZE (8 * 1024)
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/* Don't make these automatic vars or we will have to walk back up the
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stack to access them. */
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char *buf1;
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char *buf2;
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int coremaker_data = 1; /* In Data section */
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int coremaker_bss; /* In BSS section */
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const int coremaker_ro = 201; /* In Read-Only Data section */
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/* Note that if the mapping fails for any reason, we set buf2
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to -1 and the testsuite notices this and reports it as
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a failure due to a mapping error. This way we don't have
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to test for specific errors when running the core maker. */
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void
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mmapdata ()
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{
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int j, fd;
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/* Allocate and initialize a buffer that will be used to write
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the file that is later mapped in. */
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buf1 = (char *) malloc (MAPSIZE);
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for (j = 0; j < MAPSIZE; ++j)
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{
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buf1[j] = j;
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}
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/* Write the file to map in */
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fd = open ("coremmap.data", O_CREAT | O_RDWR, 0666);
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if (fd == -1)
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{
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perror ("coremmap.data open failed");
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buf2 = (char *) -1;
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return;
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}
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write (fd, buf1, MAPSIZE);
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/* Now map the file into our address space as buf2 */
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buf2 = (char *) mmap (0, MAPSIZE, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0);
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if (buf2 == (char *) -1)
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{
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perror ("mmap failed");
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return;
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}
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/* Verify that the original data and the mapped data are identical.
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If not, we'd rather fail now than when trying to access the mapped
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data from the core file. */
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for (j = 0; j < MAPSIZE; ++j)
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{
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if (buf1[j] != buf2[j])
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{
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fprintf (stderr, "mapped data is incorrect");
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buf2 = (char *) -1;
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return;
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}
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}
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}
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void
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func2 ()
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{
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int coremaker_local[5];
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int i;
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#ifdef SA_FULLDUMP
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/* Force a corefile that includes the data section for AIX. */
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{
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struct sigaction sa;
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sigaction (SIGABRT, (struct sigaction *)0, &sa);
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sa.sa_flags |= SA_FULLDUMP;
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sigaction (SIGABRT, &sa, (struct sigaction *)0);
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}
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#endif
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/* Make sure that coremaker_local doesn't get optimized away. */
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for (i = 0; i < 5; i++)
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coremaker_local[i] = i;
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coremaker_bss = 0;
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for (i = 0; i < 5; i++)
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coremaker_bss += coremaker_local[i];
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coremaker_data = coremaker_ro + 1;
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abort ();
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}
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void
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func1 ()
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{
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func2 ();
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}
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int main ()
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{
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mmapdata ();
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func1 ();
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return 0;
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}
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