forked from Imagelibrary/binutils-gdb
6b4b601b35
Test behaviour of watchpoints triggered by libc's memset/memcpy/memmove. These functions are frequently optimized with specialized instructions that favor larger memory access operations, so make sure GDB behaves correctly in their presence. There's a separate watched variable for each function so that the testcase can test whether GDB correctly identified the watchpoint that triggered. Also, the watchpoint is 28 bytes away from the beginning of the buffer being modified, so that large memory accesses (if present) are exercised. PR testsuite/31484 Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=31484 Approved-by: Kevin Buettner <kevinb@redhat.com>
46 lines
1.4 KiB
C
46 lines
1.4 KiB
C
/* This test program is part of GDB, the GNU debugger.
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Copyright 2024 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include <stdio.h>
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#include <string.h>
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int
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main (void)
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{
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/* Some targets need 4-byte alignment for hardware watchpoints. */
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char s[40] __attribute__ ((aligned (4)))
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= "This is a relatively long string...";
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char a[40] __attribute__ ((aligned (4)))
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= "String to be overwritten with zeroes";
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char b[40] __attribute__ ((aligned (4)))
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= "Another string to be memcopied...";
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char c[40] __attribute__ ((aligned (4)))
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= "Another string to be memmoved...";
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/* Break here. */
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memset (a, 0, sizeof (a));
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memcpy (b, s, sizeof (b));
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memmove (c, s, sizeof (c));
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printf ("b = '%s'\n", b);
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printf ("c = '%s'\n", c);
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return 0;
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}
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