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gdb/testsuite: Add gdb.arch/aarch64-mops-watchpoint.exp

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Test behaviour of watchpoints triggered by MOPS instructions.  This test
is similar to gdb.base/memops-watchpoint.exp, but specifically for MOPS
instructions rather than whatever instructions are used in the libc's
implementation of memset/memcpy/memmove.

There's a separate watched variable for each set of instructions so that
the testcase can test whether GDB correctly identified the watchpoint
that triggered in each case.

Approved-By: Luis Machado <luis.machado@arm.com>
Tested-By: Luis Machado <luis.machado@arm.com>
This commit is contained in:
Thiago Jung Bauermann
2024-04-04 14:05:47 -03:00
parent ebd06ca6b9
commit 55e3fcf5e5
2 changed files with 145 additions and 0 deletions
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66
gdb/testsuite/gdb.arch/aarch64-mops-watchpoint.c Normal file
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/* This test program is part of GDB, the GNU debugger.
Copyright 2024 Free Software Foundation, Inc.
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/>. */
int
main (void)
{
char source[40] __attribute__ ((aligned (8)))
= "This is a relatively long string...";
char a[40] __attribute__ ((aligned (8)))
= "String to be overwritten with zeroes";
char b[40] __attribute__ ((aligned (8)))
= "Another string to be memcopied...";
char c[40] __attribute__ ((aligned (8)))
= "Another string to be memmoved...";
char *p, *q;
long size, zero;
/* Break here. */
p = a;
size = sizeof (a);
zero = 0;
/* memset implemented in MOPS instructions. */
__asm__ volatile ("setp [%0]!, %1!, %2\n\t"
"setm [%0]!, %1!, %2\n\t"
"sete [%0]!, %1!, %2\n\t"
: "+&r"(p), "+&r"(size)
: "r"(zero)
: "memory");
p = b;
q = source;
size = sizeof (b);
/* memmove implemented in MOPS instructions. */
__asm__ volatile ("cpyp [%0]!, [%1]!, %2!\n\t"
"cpym [%0]!, [%1]!, %2!\n\t"
"cpye [%0]!, [%1]!, %2!\n\t"
: "+&r" (p), "+&r" (q), "+&r" (size)
:
: "memory");
p = c;
q = source;
size = sizeof (c);
/* memcpy implemented in MOPS instructions. */
__asm__ volatile ("cpyfp [%0]!, [%1]!, %2!\n\t"
"cpyfm [%0]!, [%1]!, %2!\n\t"
"cpyfe [%0]!, [%1]!, %2!\n\t"
: "+&r" (p), "+&r" (q), "+&r" (size)
:
: "memory");
return 0;
}

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gdb/testsuite/gdb.arch/aarch64-mops-watchpoint.exp Normal file
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# Copyright 2024 Free Software Foundation, Inc.
# 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/>.
# Test a binary that uses MOPS (Memory Operations) instructions.
# This test is similar to gdb.base/memops-watchpoint.exp, but specifically
# tests MOPS instructions rather than whatever instructions are used in the
# system libc's implementation of memset/memcpy/memmove.
require allow_hw_watchpoint_tests allow_aarch64_mops_tests
standard_testfile
if { [prepare_for_testing "failed to prepare" ${testfile} ${srcfile} \
[list debug additional_flags=-march=armv9.3-a]] } {
return -1
}
set linespec ${srcfile}:[gdb_get_line_number "Break here"]
if ![runto ${linespec}] {
return -1
}
gdb_test "watch -location a\[28\]" \
"(Hardware w|W)atchpoint ${decimal}: -location a\\\[28\\\]" \
"set watch on a"
gdb_test "watch -location b\[28\]" \
"(Hardware w|W)atchpoint ${decimal}: -location b\\\[28\\\]" \
"set watchpoint on b"
gdb_test "watch -location c\[28\]" \
"(Hardware w|W)atchpoint ${decimal}: -location c\\\[28\\\]" \
"set watchpoint on c"
gdb_test "continue" \
[multi_line \
"Continuing\\." \
"" \
"Hardware watchpoint ${decimal}: -location a\\\[28\\\]" \
"" \
"Old value = 104 'h'" \
"New value = 0 '\\\\000'" \
"$hex in main \\(\\) at .*aarch64-mops-watchpoint.c:$decimal" \
"${decimal}\\s+__asm__ volatile \\(\"setp.*\\\\n\\\\t\""] \
"continue until set watchpoint hits"
gdb_test "continue" \
[multi_line \
"Continuing\\." \
"" \
"Hardware watchpoint ${decimal}: -location b\\\[28\\\]" \
"" \
"Old value = 101 'e'" \
"New value = 114 'r'" \
"$hex in main \\(\\) at .*aarch64-mops-watchpoint.c:$decimal" \
"${decimal}\\s+__asm__ volatile \\(\"cpyp.*\\\\n\\\\t\""] \
"continue until cpy watchpoint hits"
gdb_test "continue" \
[multi_line \
"Continuing\\." \
"" \
"Hardware watchpoint ${decimal}: -location c\\\[28\\\]" \
"" \
"Old value = 100 'd'" \
"New value = 114 'r'" \
"$hex in main \\(\\) at .*aarch64-mops-watchpoint.c:$decimal" \
"${decimal}\\s+__asm__ volatile \\(\"cpyfp.*\\\\n\\\\t\""] \
"continue until cpyf watchpoint hits"