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[RFC]: New testcase for hw watchpoint, covering watch/rwatch/awatch
- From: Wu Zhou <woodzltc at cn dot ibm dot com>
- To: gdb-patches at sourceware dot org
- Date: Tue, 13 Jun 2006 14:37:11 +0800 (CST)
- Subject: [RFC]: New testcase for hw watchpoint, covering watch/rwatch/awatch
Hello all,
I see that the current watchpoint testcases don't differentiate too much
on software watchpoints and hardware ones. And rwatch and awatch is not
covered in any testcase. I ever proposed to have a specific testcase for
h/w watchpoint. OK. Here it is. I am look it as a strawman. So if you
are interested, you will have something to shot. :-)
The testcase will first use "rwatch" command to detect if hardware
watchpoint is supported. If not, it skip and quit. Otherwise, it will
test watch (set can-use-hardware-watchpoint 1), rwatch and awatch
respectively.
I had tested it on i386, ppc64 with kernel-2.6.15 (support hw watchpoint)
and ppc64 with kernel-2.6.9 (don't support hw watchpoint). On the first
two configuration, it will report 44 pass. On the third configuatrion, it
will report one fail and quit.
Here is the code:
============== gdb.base/hw-watch.exp ========================
# Copyright 2006
# 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 2 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, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
# This file was written by Wu Zhou (woodzltc@cn.ibm.com). Some of the code
# is got from recurse.exp.
if $tracelevel then {
strace $tracelevel
}
set prms_id 0
set bug_id 0
set testfile "recurse"
set srcfile ${testfile}.c
set binfile ${objdir}/${subdir}/${testfile}
if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
gdb_suppress_entire_file "Testcase compile failed, so all tests in this file will automatically fail."
}
# Start with a fresh gdb.
gdb_exit
gdb_start
gdb_reinitialize_dir $srcdir/$subdir
gdb_load ${binfile}
proc watch_tests {} {
if [runto recurse] then {
# To test if target support hardware watchpoint
gdb_test "set can-use-hw-watchpoints 1" "" ""
if [gdb_test "rwatch b" ".*Hardware read watchpoint.*" "rwatch b"] then {
unsupported "No hardware watchpoint support from target, skip this case."
exit
}
gdb_test "delete 2" "" ""
gdb_test "next" "if \\(a == 1\\)" "watch_tests: next over b = 0"
# To verify that "set can-use-hw-watchpoints 0" will disable h/w watchpoint
gdb_test "set can-use-hw-watchpoints 0" "" ""
if [gdb_test "watch b" ".*Watchpoint \[0-9]*: b" \
"watch_tests: set write watchpoint on b, this is a software one"] then {
gdb_suppress_tests;
}
# To verify that "set can-use-hw-watchpoints 1" will enable h/w watchpoint
gdb_test "delete 3" "" ""
if [gdb_test "set can-use-hw-watchpoints 1" "" ""] then {
gdb_suppress_tests;
}
if [gdb_test "watch b" ".*Hardware watchpoint \[0-9]*: b" \
"watch_tests: reset write watchpoint on b, this is a hardware one"] then {
gdb_suppress_tests;
}
gdb_test "info watchpoints" "1\[ \]*breakpoint.*recurse.*\r\n4\[ \]*hw watchpoint.*b.*" \
"watch_tests: info watchpoints"
# Continue until the first set of b
if [gdb_test "continue" \
"Continuing.*Hardware watchpoint.*: b.*Old value = 0.*New value = 10.*" \
"watch_tests: continue to the h/w write watchpoint, first time"] then {
gdb_suppress_tests;
}
# Continue inward for a few iterations
gdb_test "continue" "Breakpoint.* recurse \\(a=9\\).*" \
"watch_tests: continue to recurse (a = 9)"
gdb_test "continue" "Breakpoint.* recurse \\(a=8\\).*" \
"watch_tests: continue to recurse (a = 8)"
gdb_test "continue" "Breakpoint.* recurse \\(a=7\\).*" \
"watch_tests: continue to recurse (a = 7)"
gdb_test "continue" "Breakpoint.* recurse \\(a=6\\).*" \
"watch_tests: continue to recurse (a = 6)"
gdb_test "continue" "Breakpoint.* recurse \\(a=5\\).*" \
"watch_tests: continue to recurse (a = 5)"
gdb_test "continue" "Breakpoint.* recurse \\(a=4\\).*" \
"watch_tests: continue to recurse (a = 4)"
gdb_test "continue" "Breakpoint.* recurse \\(a=3\\).*" \
"watch_tests: continue to recurse (a = 3)"
gdb_test "continue" "Breakpoint.* recurse \\(a=2\\).*" \
"watch_tests: continue to recurse (a = 2)"
gdb_test "continue" "Breakpoint.* recurse \\(a=1\\).*" \
"watch_tests: continue to recurse (a = 1)"
if [gdb_test "continue" \
"Continuing.*\[Ww\]atchpoint.*b.*Old value = 10.*New value = 3628800.*return.*" \
"watch_tests: continue to the h/w write watchpoint, second time"] then {
gdb_suppress_tests
}
# watchpoint is automatically deleted when the process is out of its scope
if [gdb_test "continue" \
"Continuing.*\[Ww\]atchpoint.*deleted.*\(main \\(\\) \|21.*\}\).*" \
"watch_tests: hardware write watchpoint deleted when leaving scope"] then {
gdb_suppress_tests;
}
}
gdb_stop_suppressing_tests;
}
proc rwatch_tests {} {
if [runto recurse] then {
if [gdb_test "rwatch b" ".*Hardware read watchpoint \[0-9]*: b" \
"rwatch_tests: set read watchpoint, this is a hardware one"] then {
gdb_suppress_tests;
}
# Continue inward for a few iterations
gdb_test "continue" "Breakpoint.* recurse \\(a=9\\).*" \
"rwatch_tests: continue to recurse (a = 9)"
gdb_test "continue" "Breakpoint.* recurse \\(a=8\\).*" \
"rwatch_tests: continue to recurse (a = 8)"
gdb_test "continue" "Breakpoint.* recurse \\(a=7\\).*" \
"rwatch_tests: continue to recurse (a = 7)"
gdb_test "continue" "Breakpoint.* recurse \\(a=6\\).*" \
"rwatch_tests: continue to recurse (a = 6)"
gdb_test "continue" "Breakpoint.* recurse \\(a=5\\).*" \
"rwatch_tests: continue to recurse (a = 5)"
gdb_test "continue" "Breakpoint.* recurse \\(a=4\\).*" \
"rwatch_tests: continue to recurse (a = 4)"
gdb_test "continue" "Breakpoint.* recurse \\(a=3\\).*" \
"rwatch_tests: continue to recurse (a = 3)"
gdb_test "continue" "Breakpoint.* recurse \\(a=2\\).*" \
"rwatch_tests: continue to recurse (a = 2)"
gdb_test "continue" "Breakpoint.* recurse \\(a=1\\).*" \
"rwatch_tests: continue to recurse (a = 1)"
gdb_test "continue" \
"Continuing.*Hardware read watchpoint.*b.*Value = 10.*recurse \\(a=10\\).*" \
"rwatch_tests: the hardware read watchpoint hit, first time"
if [gdb_test "continue" \
"Continuing.*Hardware read watchpoint.*b.*Value = 3628800.*return.*" \
"rwatch_tests: the hardware read watchpoint hit, second time"] then {
gdb_suppress_tests
}
# watchpoint is automatically deleted when the process is out of its scope
# if [gdb_test "continue" \
# "Continuing.*\[Ww\]atchpoint.*deleted because the program has left the block.*" \
# "Hardware read watchpoint deleted when leaving scope"] then {
# gdb_suppress_tests;
# }
}
gdb_stop_suppressing_tests;
}
proc awatch_tests {} {
if [runto recurse] then {
gdb_test "next" "if \\(a == 1\\)" "awatch: next over b = 0"
if [gdb_test "awatch b" "Hardware access.*watchpoint .*: b" \
"awatch_tests: set access watchpoint on b, this is a hardware one"] then {
gdb_suppress_tests;
}
# Continue until the first set of b.
if [gdb_test "continue" \
"Continuing.*\[Ww\]atchpoint.*: b.*Old value = 0.*New value = 10.*" \
"awatch_tests: the h/w access watchpoint is hit by write operation, first time"] then {
gdb_suppress_tests;
}
# Continue inward for a few iterations
gdb_test "continue" "Breakpoint.* recurse \\(a=9\\).*" \
"awatch_tests: continue to recurse (a = 9)"
gdb_test "continue" "Breakpoint.* recurse \\(a=8\\).*" \
"awatch_tests: continue to recurse (a = 8)"
gdb_test "continue" "Breakpoint.* recurse \\(a=7\\).*" \
"awatch_tests: continue to recurse (a = 7)"
gdb_test "continue" "Breakpoint.* recurse \\(a=6\\).*" \
"awatch_tests: continue to recurse (a = 6)"
gdb_test "continue" "Breakpoint.* recurse \\(a=5\\).*" \
"awatch_tests: continue to recurse (a = 5)"
gdb_test "continue" "Breakpoint.* recurse \\(a=4\\).*" \
"awatch_tests: continue to recurse (a = 4)"
gdb_test "continue" "Breakpoint.* recurse \\(a=3\\).*" \
"awatch_tests: continue to recurse (a = 3)"
gdb_test "continue" "Breakpoint.* recurse \\(a=2\\).*" \
"awatch_tests: continue to recurse (a = 2)"
gdb_test "continue" "Breakpoint.* recurse \\(a=1\\).*" \
"awatch_tests: continue to recurse (a = 1)"
if [gdb_test "continue" \
"Continuing.*Hardware access.*watchpoint.*b.*Value = 10.*recurse \\(a=10\\).*" \
"awatch_tests: the access watchpoint is hit by read operation, first time"] then {
gdb_suppress_tests
}
if [gdb_test "continue" \
"Continuing.*\[Ww\]atchpoint.*b.*Old value = 10.*New value = 3628800.*return.*" \
"awatch_tests: the access watchpoint is hit by write operation, second time"] then {
gdb_suppress_tests
}
if [gdb_test "continue" \
"Continuing.*Hardware access.*watchpoint.*b.*Value = 3628800.*return.*" \
"awatch_tests: the access watchpoint is hit by read operation, second time"] then {
gdb_suppress_tests
}
# watchpoint is automatically deleted when the process is out of its scope
# if [gdb_test "continue" \
# "Continuing.*\[Ww\]atchpoint.*deleted because the program has left the block.*" \
# "Hardware access watchpoint deleted when leaving scope"] then {
# gdb_suppress_tests;
# }
}
gdb_stop_suppressing_tests;
}
# Preserve the old timeout, and set a new one that should be
# sufficient to avoid timing out during this test.
set oldtimeout $timeout
set timeout [expr "$timeout + 60"]
verbose "Timeout is now $timeout seconds" 2
watch_tests
rwatch_tests
awatch_tests
# Restore the preserved old timeout value.
set timeout $oldtimeout
verbose "Timeout is now $timeout seconds" 2
Any comments? Thanks a lot!
Regards
- Wu Zhou