| # Copyright (C) 2014-2021 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/>. |
| |
| # In this test we're looking at how gdb handles backtraces and |
| # investigating the stack depth when confronted with an "invalid" stack, |
| # that is a stack where the first few frames are normal, and then there's a |
| # frame where the stack in unreadable. |
| # |
| # One interesting bug that has been observed is that gdb will sometime |
| # exhibit different behaviour the first time a stack command is run |
| # compared to the second (and later) times a command is run. This is |
| # because the first time a command is run gdb actually tries to figure out |
| # the answer, while the second (and later) times gdb relies on the answer |
| # cached from the first time. As a result in this test each command is |
| # run twice, and we restart gdb before testing each different command to |
| # ensure that nothing is being cached. |
| |
| set opts {} |
| standard_testfile .c |
| |
| if { ![istarget x86_64-*-* ] || ![is_lp64_target] } { |
| verbose "Skipping ${testfile}." |
| return |
| } |
| if { [prepare_for_testing "failed to prepare" ${testfile} ${srcfile} $opts] } { |
| return -1 |
| } |
| |
| if ![runto breakpt] { |
| return -1 |
| } |
| |
| # Use 'bt no-filters' here as the python filters will raise their own |
| # error during initialisation, the no-filters case is simpler. |
| |
| gdb_test "bt no-filters" "^bt no-filters\r\n#0 +$hex in func2 \\(\\)\r\nBacktrace stopped: Cannot access memory at address 0x\[0-9a-f\]+" \ |
| "first backtrace, with error message" |
| |
| gdb_test "bt no-filters" "^bt no-filters\r\n#0 +$hex in func2 \\(\\)\r\nBacktrace stopped: Cannot access memory at address 0x\[0-9a-f\]+" \ |
| "second backtrace, with error message" |
| |
| clean_restart ${binfile} |
| |
| if ![runto breakpt] { |
| return -1 |
| } |
| |
| gdb_test "interpreter-exec mi \"-stack-info-depth\"" \ |
| "\\^done,depth=\"1\"" \ |
| "check mi -stack-info-depth command, first time" |
| |
| gdb_test "interpreter-exec mi \"-stack-info-depth\"" \ |
| "\\^done,depth=\"1\"" \ |
| "check mi -stack-info-depth command, second time" |
| |
| clean_restart ${binfile} |
| |
| if ![runto breakpt] { |
| return -1 |
| } |
| |
| gdb_test "interpreter-exec mi \"-stack-list-frames\"" \ |
| "\\^done,stack=\\\[frame=\{level=\"0\",addr=\"$hex\",func=\"func2\"(,arch=\"\[^\"\]+\")?\}\\\]" \ |
| "check mi -stack-list-frames command, first time" |
| |
| gdb_test "interpreter-exec mi \"-stack-list-frames\"" \ |
| "\\^done,stack=\\\[frame=\{level=\"0\",addr=\"$hex\",func=\"func2\"(,arch=\"\[^\"\]+\")?\}\\\]" \ |
| "check mi -stack-list-frames command, second time" |