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79 lines
3.8 KiB
Plaintext
79 lines
3.8 KiB
Plaintext
# Copyright (C) 2014-2018 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 .S
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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 "failed to prepare" ${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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gdb_test "bt" "^bt\r\n#0 +breakpt *\\(\\) \[^\r\n\]*\r\n#1 +0x\[0-9a-f\]+ in func5\[^\r\n\]*\r\n#2 +0x\[0-9a-f\]+ in func4\[^\r\n\]*\r\n#3 +0x\[0-9a-f\]+ in func3\[^\r\n\]*\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" "^bt\r\n#0 +breakpt *\\(\\) \[^\r\n\]*\r\n#1 +0x\[0-9a-f\]+ in func5\[^\r\n\]*\r\n#2 +0x\[0-9a-f\]+ in func4\[^\r\n\]*\r\n#3 +0x\[0-9a-f\]+ in func3\[^\r\n\]*\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=\"4\"" \
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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=\"4\"" \
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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=\"breakpt\",file=\"\[^\"\]+\",fullname=\"\[^\"\]+\",line=\"${decimal}\"\},frame=\{level=\"1\",addr=\"$hex\",func=\"func5\",file=\"\[^\"\]+\",fullname=\"\[^\"\]+\",line=\"${decimal}\"\},frame=\{level=\"2\",addr=\"$hex\",func=\"func4\",file=\"\[^\"\]+\",fullname=\"\[^\"\]+\",line=\"${decimal}\"\},frame=\{level=\"3\",addr=\"$hex\",func=\"func3\",file=\"\[^\"\]+\",fullname=\"\[^\"\]+\",line=\"${decimal}\"\}\\\]" \
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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=\"breakpt\",file=\"\[^\"\]+\",fullname=\"\[^\"\]+\",line=\"${decimal}\"\},frame=\{level=\"1\",addr=\"$hex\",func=\"func5\",file=\"\[^\"\]+\",fullname=\"\[^\"\]+\",line=\"${decimal}\"\},frame=\{level=\"2\",addr=\"$hex\",func=\"func4\",file=\"\[^\"\]+\",fullname=\"\[^\"\]+\",line=\"${decimal}\"\},frame=\{level=\"3\",addr=\"$hex\",func=\"func3\",file=\"\[^\"\]+\",fullname=\"\[^\"\]+\",line=\"${decimal}\"\}\\\]" \
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"check mi -stack-list-frames command, second time"
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