+/* Copyright 1992, 1993, 1994, 1995, 1996, 1999, 2007, 2008, 2009, 2010
+ Free Software Foundation, Inc.
+
+ This file is part of GDB.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
+
/* Simple little program that just generates a core dump from inside some
nested function calls. */
+#include <stdio.h>
+#include <sys/types.h>
+#include <fcntl.h>
+#include <sys/mman.h>
+#include <signal.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#ifndef __STDC__
+#define const /**/
+#endif
+
+#define MAPSIZE (8 * 1024)
+
+/* Don't make these automatic vars or we will have to walk back up the
+ stack to access them. */
+
+char *buf1;
+char *buf2;
+
+int coremaker_data = 1; /* In Data section */
+int coremaker_bss; /* In BSS section */
+
+const int coremaker_ro = 201; /* In Read-Only Data section */
+
+/* Note that if the mapping fails for any reason, we set buf2
+ to -1 and the testsuite notices this and reports it as
+ a failure due to a mapping error. This way we don't have
+ to test for specific errors when running the core maker. */
+
+void
+mmapdata ()
+{
+ int j, fd;
+
+ /* Allocate and initialize a buffer that will be used to write
+ the file that is later mapped in. */
+
+ buf1 = (char *) malloc (MAPSIZE);
+ for (j = 0; j < MAPSIZE; ++j)
+ {
+ buf1[j] = j;
+ }
+
+ /* Write the file to map in */
+
+ fd = open ("coremmap.data", O_CREAT | O_RDWR, 0666);
+ if (fd == -1)
+ {
+ perror ("coremmap.data open failed");
+ buf2 = (char *) -1;
+ return;
+ }
+ write (fd, buf1, MAPSIZE);
+
+ /* Now map the file into our address space as buf2 */
+
+ buf2 = (char *) mmap (0, MAPSIZE, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0);
+ if (buf2 == (char *) -1)
+ {
+ perror ("mmap failed");
+ return;
+ }
+
+ /* Verify that the original data and the mapped data are identical.
+ If not, we'd rather fail now than when trying to access the mapped
+ data from the core file. */
+
+ for (j = 0; j < MAPSIZE; ++j)
+ {
+ if (buf1[j] != buf2[j])
+ {
+ fprintf (stderr, "mapped data is incorrect");
+ buf2 = (char *) -1;
+ return;
+ }
+ }
+ /* Touch buf2 so kernel writes it out into 'core'. */
+ buf2[0] = buf1[0];
+}
void
func2 ()
{
+ int coremaker_local[5];
+ int i;
+
+#ifdef SA_FULLDUMP
+ /* Force a corefile that includes the data section for AIX. */
+ {
+ struct sigaction sa;
+
+ sigaction (SIGABRT, (struct sigaction *)0, &sa);
+ sa.sa_flags |= SA_FULLDUMP;
+ sigaction (SIGABRT, &sa, (struct sigaction *)0);
+ }
+#endif
+
+ /* Make sure that coremaker_local doesn't get optimized away. */
+ for (i = 0; i < 5; i++)
+ coremaker_local[i] = i;
+ coremaker_bss = 0;
+ for (i = 0; i < 5; i++)
+ coremaker_bss += coremaker_local[i];
+ coremaker_data = coremaker_ro + 1;
abort ();
}
func2 ();
}
-main ()
+int main ()
{
+ mmapdata ();
func1 ();
+ return 0;
}
-