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0891970109
In a record session, when we move backward, GDB switches from normal execution to simulation. Moving forward again, the emulation continues until the end of the reverse history. When the end is reached, the execution stops, and a warning message is shown. This message has been modified to indicate that the forward emulation has reached the end, but the execution can continue as normal, and the recording will also continue. Before this patch, the warning message shown in that case was the same as in the reverse case. This meant that when the end of history was reached in either backward or forward emulation, the same message was displayed: "No more reverse-execution history." This message has changed for these two cases. Backward emulation: "Reached end of recorded history; stopping. Backward execution from here not possible." Forward emulation: "Reached end of recorded history; stopping. Following forward execution will be added to history." The reason for this change is that the initial message was deceiving, for the forward case, making the user believe that forward debugging could not continue. Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=31224 Reviewed-By: Markus T. Metzger <markus.t.metzger@intel.com> (btrace) Approved-By: Guinevere Larsen <blarsen@redhat.com>
113 lines
3.7 KiB
Plaintext
113 lines
3.7 KiB
Plaintext
# Copyright 2008-2024 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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# This file is part of the GDB testsuite. It tests reverse debugging
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# with breakpoints in a process record logfile.
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# This test suitable only for process record-replay
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require supports_process_record
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standard_testfile break-reverse.c
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set precsave [standard_output_file break.precsave]
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if { [prepare_for_testing "failed to prepare" $testfile $srcfile] } {
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return -1
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}
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set foo_location [gdb_get_line_number "break in foo" ]
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set bar_location [gdb_get_line_number "break in bar" ]
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set main_location [gdb_get_line_number "break in main"]
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set end_location [gdb_get_line_number "end of main" ]
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proc precsave_tests {} {
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global foo_location bar_location main_location end_location
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global decimal srcfile precsave gdb_prompt
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runto_main
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# Activate process record/replay
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gdb_test_no_output "record" "turn on process record"
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gdb_test "break $end_location" \
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"Breakpoint $decimal at .*$srcfile, line $end_location\." \
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"BP at end of main"
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gdb_test "continue" "Breakpoint .* end of main .*" "run to end of main"
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gdb_test "record save $precsave" \
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"Saved core file $precsave with execution log\." \
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"save process recfile"
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gdb_test "kill" "" "kill process, prepare to debug log file" \
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"Kill the program being debugged\\? \\(y or n\\) " "y"
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gdb_test "record restore $precsave" \
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"Restored records from core file .*" \
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"reload precord save file"
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gdb_test "break foo" \
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"Breakpoint $decimal at .* line $foo_location\." \
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"set breakpoint on foo"
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gdb_test "break bar" \
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"Breakpoint $decimal at .* line $bar_location\." \
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"set breakpoint on bar"
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gdb_continue_to_breakpoint "foo forward after restore" \
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".*$srcfile:$foo_location.*"
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gdb_continue_to_breakpoint "bar forward after restore" \
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".*$srcfile:$bar_location.*"
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gdb_test_multiple "continue" "go to end of main forward" {
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-re ".*Breakpoint $decimal,.*$srcfile:$end_location.*$gdb_prompt $" {
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pass "go to end of main forward"
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}
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-re -wrap "Reached end of recorded.*Following forward.* end of main .*" {
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pass "go to end of main forward"
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}
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}
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gdb_test_no_output "set exec-direction reverse" "set reverse"
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gdb_continue_to_breakpoint "bar backward" ".*$srcfile:$bar_location.*"
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gdb_continue_to_breakpoint "foo backward" ".*$srcfile:$foo_location.*"
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gdb_test_multiple "continue" "main backward" {
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-re ".*Breakpoint $decimal,.*$srcfile:$main_location.*$gdb_prompt $" {
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pass "main backward"
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}
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-re -wrap "Reached end of recorded.*Backward execution.* break in main .*" {
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pass "main backward"
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}
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}
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gdb_test_no_output "set exec-direction forward" "set forward"
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gdb_continue_to_breakpoint "foo forward again" \
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".*$srcfile:$foo_location.*"
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gdb_continue_to_breakpoint "bar forward again" \
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".*$srcfile:$bar_location.*"
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gdb_test_multiple "continue" "end of record log" {
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-re ".*Breakpoint $decimal,.*$srcfile:$end_location.*$gdb_prompt $" {
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pass "end of record log"
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}
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-re -wrap "Reached end of recorded.*Following forward.* end of main .*" {
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pass "end of record log"
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}
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}
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}
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precsave_tests
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