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