80 lines
3 KiB
Text
80 lines
3 KiB
Text
# Copyright (C) 2014-2015 Free Software Foundation, Inc.
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#
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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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# In this test we're looking at how gdb handles backtraces and
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# investigating the stack depth when confronted with an "invalid" stack,
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# that is a stack where the first few frames are normal, and then there's a
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# frame where the stack in unreadable.
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#
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# One interesting bug that has been observed is that gdb will sometime
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# exhibit different behaviour the first time a stack command is run
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# compared to the second (and later) times a command is run. This is
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# because the first time a command is run gdb actually tries to figure out
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# the answer, while the second (and later) times gdb relies on the answer
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# cached from the first time. As a result in this test each command is
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# run twice, and we restart gdb before testing each different command to
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# ensure that nothing is being cached.
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set opts {}
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standard_testfile .c
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if { ![istarget x86_64-*-* ] || ![is_lp64_target] } {
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verbose "Skipping ${testfile}."
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return
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}
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if { [prepare_for_testing ${testfile}.exp ${testfile} ${srcfile} $opts] } {
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return -1
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}
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if ![runto breakpt] {
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return -1
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}
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# Use 'bt no-filters' here as the python filters will raise their own
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# error during initialisation, the no-filters case is simpler.
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gdb_test "bt no-filters" "^bt no-filters\r\n#0 +$hex in func2 \\(\\)\r\nBacktrace stopped: Cannot access memory at address 0x\[0-9a-f\]+" \
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"first backtrace, with error message"
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gdb_test "bt no-filters" "^bt no-filters\r\n#0 +$hex in func2 \\(\\)\r\nBacktrace stopped: Cannot access memory at address 0x\[0-9a-f\]+" \
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"second backtrace, with error message"
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clean_restart ${binfile}
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if ![runto breakpt] {
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return -1
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}
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gdb_test "interpreter-exec mi \"-stack-info-depth\"" \
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"\\^done,depth=\"1\"" \
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"check mi -stack-info-depth command, first time"
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gdb_test "interpreter-exec mi \"-stack-info-depth\"" \
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"\\^done,depth=\"1\"" \
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"check mi -stack-info-depth command, second time"
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clean_restart ${binfile}
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if ![runto breakpt] {
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return -1
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}
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gdb_test "interpreter-exec mi \"-stack-list-frames\"" \
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"\\^done,stack=\\\[frame=\{level=\"0\",addr=\"$hex\",func=\"func2\"\}\\\]" \
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"check mi -stack-list-frames command, first time"
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gdb_test "interpreter-exec mi \"-stack-list-frames\"" \
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"\\^done,stack=\\\[frame=\{level=\"0\",addr=\"$hex\",func=\"func2\"\}\\\]" \
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"check mi -stack-list-frames command, second time"
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