606 lines
19 KiB
Text
606 lines
19 KiB
Text
# Copyright (C) 1992, 1994 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 2 of the License, or
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# (at your option) any later version.
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#
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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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#
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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, write to the Free Software
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# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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# Please email any bugs, comments, and/or additions to this file to:
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# bug-gdb@prep.ai.mit.edu
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# This file was written by Fred Fish. (fnf@cygnus.com)
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if $tracelevel then {
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strace $tracelevel
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}
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set prms_id 0
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set bug_id 0
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set binfile "watchpoint"
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set srcfile $binfile.c
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if ![file exists $objdir/$subdir/$binfile] then {
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perror "$objdir/$subdir/$binfile does not exist."
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return 0
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}
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# Prepare for watchpoint tests by setting up two breakpoints and one
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# watchpoint.
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#
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# We use breakpoints at marker functions to get past all the startup code,
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# so we can get to the watchpoints in a reasonable amount of time from a
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# known starting point.
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#
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# For simplicity, so we always know how to reference specific breakpoints or
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# watchpoints by number, we expect a particular ordering and numbering of
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# each in the combined breakpoint/watchpoint table, as follows:
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#
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# Number What Where
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# 1 Breakpoint marker1()
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# 2 Breakpoint marker2()
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# 3 Watchpoint ival3
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proc initialize {} {
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global prompt
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global hex
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global decimal
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global srcfile
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send "break marker1\n"
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expect {
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-re "Breakpoint 1 at $hex: file .*$srcfile, line $decimal.*$prompt $" {
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pass "set breakpoint at marker1"
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}
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-re ".*$prompt $" { fail "set breakpoint at marker1" ; return 0 }
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timeout { fail "set breakpoint at marker1 (timeout)" ; return 0 }
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}
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send "break marker2\n"
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expect {
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-re "Breakpoint 2 at $hex: file .*$srcfile, line $decimal.*$prompt $" {
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pass "set breakpoint at marker2"
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}
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-re ".*$prompt $" { fail "set breakpoint at marker2" ; return 0 }
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timeout { fail "set breakpoint at marker2 (timeout)" ; return 0 }
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}
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send "info break\n"
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expect {
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-re "1\[ \]*breakpoint.*marker1.*\r\n2\[ \]*breakpoint.*marker2.*\r\n$prompt $" { pass "info break in watchpoint.exp" }
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-re ".*$prompt $" { fail "info break in watchpoint.exp" ; return 0 }
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timeout { fail "info break in watchpoint.exp (timeout)" ; return 0 }
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}
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send "watch ival3\n"
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expect {
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-re ".*\[Ww\]atchpoint 3: ival3\r\n$prompt $" {
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pass "set watchpoint on ival3"
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}
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-re ".*$prompt $" { fail "set watchpoint on ival3" ; return 0 }
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timeout { fail "set watchpoint on ival3 (timeout)" ; return 0 }
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}
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# "info watch" is the same as "info break"
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send "info watch\n"
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expect {
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-re "1\[ \]*breakpoint.*marker1.*\r\n2\[ \]*breakpoint.*marker2.*\r\n3\[ \]*.*watchpoint.*ival3\r\n$prompt $" {
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pass "watchpoint found in watchpoint/breakpoint table"
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}
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-re ".*$prompt $" {
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fail "watchpoint found in watchpoint/breakpoint table" ; return 0
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}
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timeout {
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fail "watchpoint found in watchpoint/breakpoint table" ; return 0
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}
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}
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# After installing the watchpoint, we disable it until we are ready
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# to use it. This allows the test program to run at full speed until
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# we get to the first marker function.
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send "disable 3\n"
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expect {
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-re "disable 3\r\n$prompt $" { pass "disable watchpoint" }
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-re ".*$prompt $" { fail "disable watchpoint" ; return 0 }
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timeout { fail "disable watchpoint (timeout)" ; return 0 }
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}
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return 1
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}
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#
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# Test simple watchpoint.
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#
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proc test_simple_watchpoint {} {
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global prompt
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global hex
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global decimal
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# Ensure that the watchpoint is disabled when we startup.
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send "disable 3\n"
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expect {
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-re "^disable 3\r\n$prompt $" {
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pass "disable watchpoint in test_simple_watchpoint"
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}
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-re ".*$prompt $" {
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fail "disable watchpoint in test_simple_watchpoint"
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return 0
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}
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timeout {
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fail "disable watchpoint in test_simple_watchpoint (timeout)"
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return 0
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}
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}
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# Run until we get to the first marker function.
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gdb_run_cmd
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expect {
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-re "Breakpoint 1, marker1 .*$prompt $" {
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pass "run to marker1 in test_simple_watchpoint"
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}
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-re ".*$prompt $" {
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fail "run to marker1 in test_simple_watchpoint"
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return
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}
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timeout {
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fail "run to marker1 in test_simple_watchpoint (timeout)"
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return
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}
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}
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# After reaching the marker function, enable the watchpoint.
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send "enable 3\n"
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expect {
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-re "^enable 3\r\n$prompt $" { pass "enable watchpoint" }
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-re ".*$prompt $" { fail "enable watchpoint" ; return }
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timeout { fail "enable watchpoint (timeout)" ; return }
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}
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gdb_test "break func1" "Breakpoint.*at.*"
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gdb_test "set \$func1_breakpoint_number = \$bpnum" ""
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gdb_test "continue" "Continuing.*Breakpoint \[0-9\]*, func1.*" \
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"continue to breakpoint at func1"
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# Continue until the first change, from -1 to 0
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send "cont\n"
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expect {
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-re "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = -1.*New value = 0.*ival3 = count; ival4 = count;.*$prompt $" {
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pass "watchpoint hit, first time"
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}
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-re "Continuing.*Breakpoint.*func1.*$prompt $" {
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setup_xfail "m68*-*-*" 2597
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fail "thought it hit breakpoint at func1 twice"
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gdb_test "delete \$func1_breakpoint_number" ""
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gdb_test "continue" "\
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Continuing.*\[Ww\]atchpoint.*ival3.*Old value = -1.*New value = 0.*ival3 = count;" \
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"watchpoint hit, first time"
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}
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-re ".*$prompt $" { fail "watchpoint hit, first time" ; return }
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timeout { fail "watchpoint hit, first time (timeout)" ; return }
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eof { fail "watchpoint hit, first time (eof)" ; return }
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}
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gdb_test "delete \$func1_breakpoint_number" ""
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# Continue until the next change, from 0 to 1.
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gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = 0.*New value = 1.*ival3 = count; ival4 = count;.*" "watchpoint hit, second time"
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# Continue until the next change, from 1 to 2.
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gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = 1.*New value = 2.*ival3 = count; ival4 = count;.*" "watchpoint hit, third time"
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# Continue until the next change, from 2 to 3.
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gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = 2.*New value = 3.*ival3 = count; ival4 = count;.*" "watchpoint hit, fourth time"
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# Continue until the next change, from 3 to 4.
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# Note that this one is outside the loop.
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gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = 3.*New value = 4.*ival3 = count; ival4 = count;.*" "watchpoint hit, fifth time"
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# Continue until we hit the finishing marker function.
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# Make sure we hit no more watchpoints.
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gdb_test "cont" "Continuing.*Breakpoint.*marker2 \(\).*" \
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"continue to marker2"
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# Disable the watchpoint so we run at full speed until we exit.
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send "disable 3\n"
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expect {
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-re "^disable 3\r\n$prompt $" { pass "watchpoint disabled" }
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-re ".*$prompt $" { fail "watchpoint disabled" ; return }
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timeout { fail "watchpoint disabled (timeout)" ; return }
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}
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# Run until process exits.
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gdb_test "cont" "Continuing.*Program exited normally.*" \
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"continue to exit in test_simple_watchpoint"
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}
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# Test disabling watchpoints.
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proc test_disabling_watchpoints {} {
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global prompt
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global binfile
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global srcfile
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global decimal
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global hex
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# Ensure that the watchpoint is disabled when we startup.
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send "disable 3\n"
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expect {
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-re "^disable 3\r\n$prompt $" {
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pass "disable watchpoint in test_disabling_watchpoints"
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}
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-re ".*$prompt $" {
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fail "disable watchpoint in test_disabling_watchpoints"
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return 0
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}
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timeout {
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fail "disable watchpoint in test_disabling_watchpoints (timeout)"
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return 0
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}
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}
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# Run until we get to the first marker function.
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gdb_run_cmd
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expect {
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-re "Breakpoint 1, marker1 .*$prompt $" {
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pass "run to marker1 in test_disabling_watchpoints"
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}
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-re ".*$prompt $" {
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fail "run to marker1 in test_disabling_watchpoints"
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return
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}
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timeout {
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fail "run to marker1 in test_disabling_watchpoints (timeout)"
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return
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}
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}
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# After reaching the marker function, enable the watchpoint.
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send "enable 3\n"
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expect {
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-re "^enable 3\r\n$prompt $" { pass "watchpoint enabled" }
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-re ".*$prompt $" { fail "watchpoint enabled" ; return }
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timeout { fail "watchpoint enabled (timeout)" ; return }
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}
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# Continue until the first change, from -1 to 0
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# Don't check the old value, because on VxWorks the variable value
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# will not have been reinitialized.
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gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = .*New value = 0.*ival3 = count; ival4 = count;.*" "watchpoint hit in test_disabling_watchpoints, first time"
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# Continue until the next change, from 0 to 1.
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gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = 0.*New value = 1.*ival3 = count; ival4 = count;.*" "watchpoint hit in test_disabling_watchpoints, second time"
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# Disable the watchpoint but leave breakpoints
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send "disable 3\n"
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expect {
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-re "^disable 3\r\n$prompt $" {
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pass "disable watchpoint #2 in test_disabling_watchpoints"
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}
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-re ".*$prompt $" {
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"disable watchpoint #2 in test_disabling_watchpoints"
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return 0
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}
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timeout {
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"disable watchpoint #2 in test_disabling_watchpoints (timeout)"
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return 0
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}
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}
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# Check watchpoint list, looking for the entry that confirms the
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# watchpoint is disabled.
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gdb_test "info watchpoints" "3\[ \]*.*watchpoint\[ \]*keep\[ \]*n\[ \]*ival3\r\n.*" "watchpoint disabled in table"
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# Continue until we hit the finishing marker function.
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# Make sure we hit no more watchpoints.
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gdb_test "cont" "Continuing.*Breakpoint.*marker2 \\(\\).*" \
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"disabled watchpoint skipped"
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gdb_test "cont" "Continuing.*Program exited normally.*" \
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"continue to exit in test_disabling_watchpoints"
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}
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# Test stepping and other mundane operations with watchpoints enabled
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proc test_stepping {} {
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global prompt
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if [runto marker1] then {
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gdb_test "watch ival2" ".*\[Ww\]atchpoint \[0-9\]*: ival2"
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# Well, let's not be too mundane. It should be a *bit* of a challenge
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gdb_test "break func2 if 0" "Breakpoint.*at.*"
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gdb_test "p \$func2_breakpoint_number = \$bpnum" " = .*"
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# The HPPA has a problem here if it's not using hardware watchpoints
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if {[ istarget "hppa*-*-*" ] && ![ istarget "hppa*-*-*bsd*" ]} then {
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# Don't actually try doing the call, if we do we can't continue.
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setup_xfail "*-*-*"
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fail "calling function with watchpoint enabled"
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} else {
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# The problem is that GDB confuses stepping through the call
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# dummy with hitting the breakpoint at the end of the call dummy.
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# Will be fixed once all architectures define
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# CALL_DUMMY_BREAKPOINT_OFFSET.
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setup_xfail "*-*-*"
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# This doesn't occur if the call dummy starts with a call,
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# because we are out of the dummy by the first time the inferior
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# stops.
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clear_xfail "m68*-*-*"
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clear_xfail "i*86*-*-*"
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clear_xfail "vax-*-*"
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# The following architectures define CALL_DUMMY_BREAKPOINT_OFFSET.
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clear_xfail "alpha-*-*"
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clear_xfail "mips*-*-*"
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clear_xfail "sparc-*-*"
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clear_xfail "hppa*-*-*bsd*"
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gdb_test "p func1 ()" "= 73" \
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"calling function with watchpoint enabled"
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}
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#
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# "finish" brings us back to main.
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# On some targets (e.g. alpha) gdb will stop from the finish in midline
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# of the marker1 call. This is due to register restoring code on
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# the alpha and might be caused by stack adjustment instructions
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# on other targets. In this case we will step once more.
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#
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send "finish\n"
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expect {
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-re "Run.*exit from.*marker1.*main.* at" { }
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default { fail "finish from marker1" ; return }
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}
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expect {
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-re "marker1 \\(\\);.*$prompt $" {
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send "step\n"
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exp_continue
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}
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-re "func1 \\(\\);.*$prompt $" {
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pass "finish from marker1"
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}
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-re ".*$prompt $" {
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fail "finish from marker1"
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}
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default { fail "finish from marker1" ; return }
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}
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gdb_test "next" "for \\(count = 0.*" "next to `for' in watchpoint.exp"
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# Now test that "until" works. It's a bit tricky to test
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# "until", because compilers don't always arrange the code
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# exactly the same way, and we might get slightly different
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# sequences of statements. But the following should be true
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# (if not it is a compiler or a debugger bug): The user who
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# does "until" at every statement of a loop should end up
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# stepping through the loop once, and the debugger should not
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# stop for any of the remaining iterations.
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gdb_test "until" "ival1 = count.*" "until to ival1 assignment"
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gdb_test "until" "ival3 = count.*" "until to ival3 assignment"
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send "until\n"
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expect {
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-re "(for \\(count = 0|\}).*$prompt $" {
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gdb_test "until" "ival1 = count; /. Outside loop ./" \
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"until out of loop"
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}
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-re "ival1 = count; /. Outside loop ./.*$prompt $" {
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pass "until out of loop"
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}
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-re ".*$prompt $" {
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fail "until out of loop"
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}
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default { fail "until out of loop" ; return }
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}
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gdb_test "step" "ival2 = count.*" "step to ival2 assignment"
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}
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}
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# Test stepping and other mundane operations with watchpoints enabled
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proc test_watchpoint_triggered_in_syscall {} {
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global prompt
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global noinferiorio
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if $noinferiorio {
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verbose "Skipping test_watchpoint_triggered_in_syscall due to noinferiorio"
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return
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}
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# Run until we get to the first marker function.
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set x 0
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set y 0
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set testname "Watch buffer passed to read syscall"
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if [runto marker2] then {
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gdb_test "watch buf\[0\]" ".*\[Ww\]atchpoint \[0-9\]*: buf\\\[0\\\]"
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gdb_test "watch buf\[1\]" ".*\[Ww\]atchpoint \[0-9\]*: buf\\\[1\\\]"
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gdb_test "watch buf\[2\]" ".*\[Ww\]atchpoint \[0-9\]*: buf\\\[2\\\]"
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gdb_test "watch buf\[3\]" ".*\[Ww\]atchpoint \[0-9\]*: buf\\\[3\\\]"
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gdb_test "watch buf\[4\]" ".*\[Ww\]atchpoint \[0-9\]*: buf\\\[4\\\]"
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gdb_test "break marker4" ".*Breakpoint.*"
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gdb_test "set doread = 1" ""
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# If we send "123\n" before gdb has switched the tty, then it goes
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# to gdb, not the inferior, and we lose. So that is why we have
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# watchpoint.c prompt us, so we can wait for that prompt.
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send "continue\n"
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expect {
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-re "Continuing\\.\r\ntype stuff for buf now:" {
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pass "continue to read"
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}
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default { fail "continue to read"; return }
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}
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send "123\n"
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expect {
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-re ".*\[Ww\]atchpoint.*buf\\\[0\\\].*Old value = 0.*New value = 49\[^\n\]*\n" { set x [expr $x+1] ; exp_continue }
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-re ".*\[Ww\]atchpoint.*buf\\\[1\\\].*Old value = 0.*New value = 50\[^\n\]*\n" { set x [expr $x+1] ; exp_continue }
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-re ".*\[Ww\]atchpoint.*buf\\\[2\\\].*Old value = 0.*New value = 51\[^\n\]*\n" { set x [expr $x+1] ; exp_continue }
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-re ".*\[Ww\]atchpoint.*buf\\\[3\\\].*Old value = 0.*New value = 10\[^\n\]*\n" { set x [expr $x+1] ; exp_continue }
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-re ".*$prompt $" { pass "sent 123" }
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timeout { fail "sent 123" }
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}
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# Examine the values in buf to see how many watchpoints we
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# should have printed.
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send "print buf\[0\]\n"
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expect {
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-re ".*= 49.*$prompt $" { set y [expr $y+1]; pass "print buf\[0\]"}
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-re ".*= 0.*$prompt $" { pass "print buf\[0\]"}
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-re ".*$prompt $" { fail "print buf\[0\]"}
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default { fail "print buf\[0\]"}
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}
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send "print buf\[1\]\n"
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expect {
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-re ".*= 50.*$prompt $" { set y [expr $y+1]; pass "print buf\[1\]"}
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-re ".*= 0.*$prompt $" { pass "print buf\[1\]"}
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-re ".*$prompt $" { fail "print buf\[1\]"}
|
|
default { fail "print buf\[1\]"}
|
|
}
|
|
send "print buf\[2\]\n"
|
|
expect {
|
|
-re ".*= 51.*$prompt $" { set y [expr $y+1]; pass "print buf\[2\]"}
|
|
-re ".*= 0.*$prompt $" { pass "print buf\[2\]"}
|
|
-re ".*$prompt $" { fail "print buf\[2\]"}
|
|
default { fail "print buf\[2\]"}
|
|
}
|
|
send "print buf\[3\]\n"
|
|
expect {
|
|
-re ".*= 10.*$prompt $" { set y [expr $y+1]; pass "print buf\[3\]"}
|
|
-re ".*= 0.*$prompt $" { pass "print buf\[3\]"}
|
|
-re ".*$prompt $" { fail "print buf\[3\]" }
|
|
default { fail "print buf\[3\]" }
|
|
}
|
|
|
|
# Did we find what we were looking for? If not, flunk it.
|
|
if [expr $x==$y] then { pass $testname } else { fail "$testname (only triggered $x watchpoints, expected $y)"}
|
|
|
|
# Continue until we hit the finishing marker function.
|
|
# Make sure we hit no more watchpoints.
|
|
gdb_test "cont" "Continuing.*Breakpoint.*marker4 \\(\\).*" \
|
|
"continue to marker4"
|
|
|
|
# Disable everything so we can finish the program at full speed
|
|
gdb_test "disable" "" "disable in test_watchpoint_triggered_in_syscall"
|
|
|
|
gdb_test "cont" "Continuing.*Program exited normally.*" \
|
|
"continue to exit in test_watchpoint_triggered_in_syscall"
|
|
}
|
|
}
|
|
|
|
# Do a simple test of of watching through a pointer when the pointer
|
|
# itself changes. Should add some more complicated stuff here.
|
|
|
|
proc test_complex_watchpoint {} {
|
|
global prompt
|
|
|
|
if [runto marker4] then {
|
|
gdb_test "watch ptr1->val" ".*\[Ww\]atchpoint \[0-9\]*: ptr1->val"
|
|
gdb_test "break marker5" ".*Breakpoint.*"
|
|
|
|
gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ptr1->val.*Old value = 1.*New value = 2.*" "Test complex watchpoint"
|
|
|
|
# Continue until we hit the marker5 function.
|
|
# Make sure we hit no more watchpoints.
|
|
|
|
gdb_test "cont" "Continuing.*Breakpoint.*marker5 \\(\\).*" \
|
|
"did not trigger wrong watchpoint"
|
|
|
|
# Disable everything so we can finish the program at full speed
|
|
gdb_test "disable" "" "disable in test_complex_watchpoint"
|
|
|
|
gdb_test "cont" "Continuing.*Program exited normally.*" \
|
|
"continue to exit in test_complex_watchpoint"
|
|
}
|
|
}
|
|
|
|
# Start with a fresh gdb.
|
|
|
|
gdb_exit
|
|
gdb_start
|
|
gdb_reinitialize_dir $srcdir/$subdir
|
|
gdb_load $objdir/$subdir/$binfile
|
|
|
|
if [initialize] then {
|
|
|
|
test_simple_watchpoint
|
|
|
|
# The IDT/sim monitor only has 8 (!) open files, of which it uses
|
|
# 4 (!). So we have to make sure one program exits before
|
|
# starting another one.
|
|
if [istarget "mips-idt-*"] then {
|
|
gdb_exit
|
|
gdb_start
|
|
gdb_reinitialize_dir $srcdir/$subdir
|
|
gdb_load $objdir/$subdir/$binfile
|
|
initialize
|
|
}
|
|
|
|
test_disabling_watchpoints
|
|
|
|
# See above.
|
|
if [istarget "mips-idt-*"] then {
|
|
gdb_exit
|
|
gdb_start
|
|
gdb_reinitialize_dir $srcdir/$subdir
|
|
gdb_load $objdir/$subdir/$binfile
|
|
initialize
|
|
}
|
|
|
|
test_stepping
|
|
|
|
# See above.
|
|
if [istarget "mips-idt-*"] then {
|
|
gdb_exit
|
|
gdb_start
|
|
gdb_reinitialize_dir $srcdir/$subdir
|
|
gdb_load $objdir/$subdir/$binfile
|
|
initialize
|
|
}
|
|
|
|
# Only enabled for some targets merely because it has not been tested
|
|
# elsewhere.
|
|
# On sparc-sun-sunos4.1.3, GDB was running all the way to the marker4
|
|
# breakpoint before stopping for the watchpoint. I don't know why.
|
|
if {[istarget "hppa*-*-*"]} then {
|
|
test_watchpoint_triggered_in_syscall
|
|
}
|
|
|
|
# See above.
|
|
if [istarget "mips-idt-*"] then {
|
|
gdb_exit
|
|
gdb_start
|
|
gdb_reinitialize_dir $srcdir/$subdir
|
|
gdb_load $objdir/$subdir/$binfile
|
|
initialize
|
|
}
|
|
|
|
# Only enabled for some targets merely because it has not been tested
|
|
# elsewhere.
|
|
if {[istarget "hppa*-*-*"] || [istarget "sparc*-*-sunos*"]} then {
|
|
test_complex_watchpoint
|
|
}
|
|
}
|