93 lines
3.4 KiB
Text
93 lines
3.4 KiB
Text
# Copyright 2011-2012 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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#
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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, see <http://www.gnu.org/licenses/>.
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# x86 and amd64 gdbserver had a bug where a watchpoint triggered by
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# the DR3 debug register would trip on a bogus assertion.
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# This test relies on being able to set 4 hardware watchpoints. Since
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# that is not a valid assumption across most targets, and we're
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# testing a x86 specific bug, skip everywhere else.
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if { ![istarget "i?86-*-*"] && ![istarget "x86_64-*-*"] } then {
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return 0
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}
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set testfile "i386-dr3-watch"
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set srcfile ${testfile}.c
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if [prepare_for_testing ${testfile}.exp ${testfile} ${srcfile} {debug $additional_flags}] {
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untested "failed to compile ${testfile}"
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return -1
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}
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if ![runto_main] then {
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untested "could not run to main"
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return -1
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}
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gdb_test_no_output "set breakpoint always-inserted on"
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# Test that we handle watchpoints in all of DR0-DR3.
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gdb_test "watch i1" "Hardware watchpoint .*: i1"
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gdb_test "watch i2" "Hardware watchpoint .*: i2"
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gdb_test "watch i3" "Hardware watchpoint .*: i3"
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gdb_test "watch i4" "Hardware watchpoint .*: i4"
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gdb_test "c" "Hardware watchpoint.*: i1.*" "continue to i1 watchpoint"
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gdb_test "c" "Hardware watchpoint.*: i2.*" "continue to i2 watchpoint"
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gdb_test "c" "Hardware watchpoint.*: i3.*" "continue to i3 watchpoint"
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gdb_test "c" "Hardware watchpoint.*: i4.*" "continue to i4 watchpoint"
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delete_breakpoints
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# Regression test for a bug where the i386 watchpoints support backend
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# would leave some debug registers occupied even if not enough debug
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# registers were available to cover a single watchpoint location.
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gdb_test "watch i1" \
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"Hardware watchpoint .*: i1" \
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"set watchpoint occuping one debug register"
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# gap1 too long to fit the 3 left over debug registers (but would fit
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# 4 if all were available).
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set test "watchpoint on gap1 does not fit debug registers"
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gdb_test_multiple "watch gap1" "$test" {
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-re "Hardware watchpoint .*: gap1.*Warning:.*Could not insert hardware watchpoint.*You may have requested too many.*\r\n$gdb_prompt $" {
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pass $test
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}
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-re "Hardware watchpoint .*: gap1\r\n$gdb_prompt $" {
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pass "$test (target emulates hardware watchpoints)"
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return
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}
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-re "Watchpoint .*: gap1\r\n$gdb_prompt $" {
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pass "$test (gdb figured out itself the watchpoint does not fit)"
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return
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}
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}
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# Start over.
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gdb_test "delete" \
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"" \
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"delete all watchpoints" \
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{Delete all breakpoints\? \(y or n\) $} \
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"y"
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# If debug registers were left occupied by mistake, we'll fail to set
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# some of these watchpoints. Each watchpoint should fit in one of the
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# 4 debug registers available.
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gdb_test "watch i1" "Hardware watchpoint .*: i1" "watch i1 still fits"
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gdb_test "watch i2" "Hardware watchpoint .*: i2" "watch i2 still fits"
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gdb_test "watch i3" "Hardware watchpoint .*: i3" "watch i3 still fits"
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gdb_test "watch i4" "Hardware watchpoint .*: i4" "watch i4 still fits"
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