2018-01-01 05:43:02 +01:00
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# Copyright 2004-2018 Free Software Foundation, Inc.
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2004-11-03 15:46:18 +01:00
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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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2007-08-23 20:14:19 +02:00
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# the Free Software Foundation; either version 3 of the License, or
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2004-11-03 15:46:18 +01:00
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# (at your option) any later version.
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2007-08-23 20:14:19 +02:00
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#
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2004-11-03 15:46:18 +01:00
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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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2007-08-23 20:14:19 +02:00
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#
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2004-11-03 15:46:18 +01:00
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# You should have received a copy of the GNU General Public License
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2007-08-23 20:14:19 +02:00
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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2004-11-03 15:46:18 +01:00
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# This test is to check that a frame's "info frame", especially the
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# saved registers list, doesn't change while that frame isn't current.
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# It uses the program savedregs.c to construct a somewhat warped
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# backtrace (contains both signal and dummy frames) and then, at each
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# step checks that non-inner frames have consistent "info frame"
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# output. Note that a frame's "info frame" can only be captured after
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# it is non-current (made a call, interrupted, ...), this is because
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# instructions executed to perform the call may affect "info frame"
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# output.
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if [target_info exists gdb,nosignals] {
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verbose "Skipping savedregs.exp because of nosignals."
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continue
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}
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test suite update - gdb.base/s*
Convert files gdb.base/s*.exp to use standard_output_file et al.
* gdb.base/save-bp.exp, gdb.base/savedregs.exp,
gdb.base/scope.exp, gdb.base/sep.exp, gdb.base/sepsymtab.exp,
gdb.base/set-lang-auto.exp, gdb.base/setshow.exp,
gdb.base/setvar.exp, gdb.base/shlib-call.exp,
gdb.base/shreloc.exp, gdb.base/sigall.exp,
gdb.base/sigaltstack.exp, gdb.base/sigbpt.exp,
gdb.base/sigchld.exp, gdb.base/siginfo-addr.exp,
gdb.base/siginfo-infcall.exp, gdb.base/siginfo-obj.exp,
gdb.base/siginfo.exp, gdb.base/signals.exp, gdb.base/signest.exp,
gdb.base/signull.exp, gdb.base/sigrepeat.exp,
gdb.base/sigstep.exp, gdb.base/sizeof.exp,
gdb.base/skip-solib.exp, gdb.base/so-impl-ld.exp,
gdb.base/solib-display.exp, gdb.base/solib-nodir.exp,
gdb.base/solib-overlap.exp, gdb.base/solib-symbol.exp,
gdb.base/solib-weak.exp, gdb.base/source.exp,
gdb.base/stack-checking.exp, gdb.base/stale-infcall.exp,
gdb.base/stap-probe.exp, gdb.base/start.exp,
gdb.base/step-break.exp, gdb.base/step-bt.exp,
gdb.base/step-line.exp, gdb.base/step-resume-infcall.exp,
gdb.base/step-test.exp, gdb.base/structs.exp,
gdb.base/structs2.exp, gdb.base/structs3.exp,
gdb.base/symbol-without-target_section.exp: Use standard_testfile,
standard_output_file, prepare_for_testing, clean_restart.
2013-06-27 20:58:28 +02:00
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standard_testfile .c
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2004-11-03 15:46:18 +01:00
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if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
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2016-12-01 21:47:50 +01:00
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untested "failed to compile"
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2004-11-03 15:46:18 +01:00
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return -1
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}
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# get things started
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test suite update - gdb.base/s*
Convert files gdb.base/s*.exp to use standard_output_file et al.
* gdb.base/save-bp.exp, gdb.base/savedregs.exp,
gdb.base/scope.exp, gdb.base/sep.exp, gdb.base/sepsymtab.exp,
gdb.base/set-lang-auto.exp, gdb.base/setshow.exp,
gdb.base/setvar.exp, gdb.base/shlib-call.exp,
gdb.base/shreloc.exp, gdb.base/sigall.exp,
gdb.base/sigaltstack.exp, gdb.base/sigbpt.exp,
gdb.base/sigchld.exp, gdb.base/siginfo-addr.exp,
gdb.base/siginfo-infcall.exp, gdb.base/siginfo-obj.exp,
gdb.base/siginfo.exp, gdb.base/signals.exp, gdb.base/signest.exp,
gdb.base/signull.exp, gdb.base/sigrepeat.exp,
gdb.base/sigstep.exp, gdb.base/sizeof.exp,
gdb.base/skip-solib.exp, gdb.base/so-impl-ld.exp,
gdb.base/solib-display.exp, gdb.base/solib-nodir.exp,
gdb.base/solib-overlap.exp, gdb.base/solib-symbol.exp,
gdb.base/solib-weak.exp, gdb.base/source.exp,
gdb.base/stack-checking.exp, gdb.base/stale-infcall.exp,
gdb.base/stap-probe.exp, gdb.base/start.exp,
gdb.base/step-break.exp, gdb.base/step-bt.exp,
gdb.base/step-line.exp, gdb.base/step-resume-infcall.exp,
gdb.base/step-test.exp, gdb.base/structs.exp,
gdb.base/structs2.exp, gdb.base/structs3.exp,
gdb.base/symbol-without-target_section.exp: Use standard_testfile,
standard_output_file, prepare_for_testing, clean_restart.
2013-06-27 20:58:28 +02:00
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clean_restart ${binfile}
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2004-11-03 15:46:18 +01:00
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# Advance to main
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if { ![runto_main] } {
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2013-06-07 19:31:09 +02:00
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gdb_suppress_tests
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2004-11-03 15:46:18 +01:00
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}
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proc process_saved_regs { current inner outer } {
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global gdb_prompt
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global expect_out
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global saved_regs
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# Skip the CURRENT frame.
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set level 1
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# Run over the list of INNER frames capturing the "info frame"
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# output for each. Both dummy and sigtramp frames need to be
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# handled specially: they do not yet have correct function names;
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# and for dummy frames won't have saved registers. If there's a
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# problem, fail but capture the output anyway, hopefully later
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# "info frame" requests for that same frame will at least fail in
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# a consistent manner (stops propogated fails).
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foreach func $inner {
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set saved_regs($func) "error"
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2016-12-01 21:40:05 +01:00
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set test "get $func info frame"
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2004-11-03 15:46:18 +01:00
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# Both dummy and sigtramp frames have problems.
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switch $func {
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dummy {
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# Dummy frame's do not have saved registers, and do
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# not print <dummy>.
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2006-05-06 00:48:10 +02:00
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set pat "Stack frame at .*"
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2004-11-03 15:46:18 +01:00
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}
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sigtramp {
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# Sigtramp frames don't yet print <signal trampoline>.
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2004-11-07 17:47:57 +01:00
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set pat "Stack frame at .* Saved registers:.*"
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2004-11-03 15:46:18 +01:00
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}
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default {
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Relax pattern to match the output of "info frame" in gdb.base/savedregs.exp
Hi,
I see the following two fails in gdb.base/savedregs.exp on aarch64-linux,
info frame 2^M
Stack frame at 0x7ffffffa60:^M
pc = 0x40085c in thrower (/home/yao/SourceCode/gnu/gdb/git/gdb/testsuite/gdb.base/savedregs.c:49); saved pc = 0x400898^M
called by frame at 0x7ffffffa70, caller of frame at 0x7fffffe800^M
source language c.^M
Arglist at 0x7ffffffa60, args: ^M
Locals at 0x7ffffffa60, Previous frame's sp is 0x7ffffffa60^M
(gdb) FAIL: gdb.base/savedregs.exp: Get thrower info frame
info frame 2^M
Stack frame at 0x7fffffe800:^M
pc = 0x400840 in catcher (/home/yao/SourceCode/gnu/gdb/git/gdb/testsuite/gdb.base/savedregs.c:42); saved pc = 0x7fb7ffc350^M
called by frame at 0x7fffffe800, caller of frame at 0x7fffffe7e0^M
source language c.^M
Arglist at 0x7fffffe7f0, args: sig=11^M
Locals at 0x7fffffe7f0, Previous frame's sp is 0x7fffffe800
(gdb) FAIL: gdb.base/savedregs.exp: Get catcher info frame
looks the test expects to match "Saved registers:" from the output of
"info frame", but no registers are saved on these two frames, because
thrower and catcher are simple and leaf functions.
(gdb) disassemble thrower
Dump of assembler code for function thrower:
0x0000000000400858 <+0>: mov x0, #0x0 // #0
0x000000000040085c <+4>: strb wzr, [x0]
0x0000000000400860 <+8>: ret
End of assembler dump.
(gdb) disassemble catcher
Dump of assembler code for function catcher:
0x0000000000400838 <+0>: sub sp, sp, #0x10
0x000000000040083c <+4>: str w0, [sp,#12]
0x0000000000400840 <+8>: adrp x0, 0x410000
0x0000000000400844 <+12>: add x0, x0, #0xb9c
0x0000000000400848 <+16>: mov w1, #0x1 // #1
0x000000000040084c <+20>: str w1, [x0]
0x0000000000400850 <+24>: add sp, sp, #0x10
0x0000000000400854 <+28>: ret
There are two ways to fix these fails, one is to modify functions to
force some registers saved (for example, doing function call in them),
and the other one is to relax the pattern to optionally match
"Saved registers:". I did both, and feel that the latter is simple,
so here is it.
gdb/testsuite:
2015-03-26 Yao Qi <yao.qi@linaro.org>
* gdb.base/savedregs.exp (process_saved_regs): Make
"Saved registers:" optional in the pattern.
2015-03-26 09:16:20 +01:00
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set pat "Stack frame at .* in $func .*( Saved registers:.*)?"
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2004-11-03 15:46:18 +01:00
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}
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}
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# If the "info frame" barf, capture the output anyway so that
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# it does not cascade further failures.
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gdb_test_multiple "info frame $level" "$test" {
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-re "($pat)$gdb_prompt " {
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set saved_regs($func) "$expect_out(1,string)"
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pass "$test"
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}
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-re "(Stack frame at .*)$gdb_prompt " {
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set saved_regs($func) "$expect_out(1,string)"
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fail "$test"
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}
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-re "(Cannot access .*)$gdb_prompt " {
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set saved_regs($func) "$expect_out(1,string)"
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fail "$test"
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}
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}
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incr level
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}
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# Now iterate through the list of OUTER frames checking that the
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# "info frame" output from each still matches what was captured
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# during an early query. To avoid cascading failures, checking is
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# abandoned after the first failure. The assumption is that,
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# since frames outer to the botched frame rely on the botched
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# frame's info, those more outer frames are also botched. Besides
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# we've got the failure we're after.
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set ok 1
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foreach func $outer {
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set test [concat "Check $func info frame; stack contains" \
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$current $inner $outer]
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if $ok {
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set ok 0
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set pat [string_to_regexp "$saved_regs($func)"]
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gdb_test_multiple "info frame $level" "$test" {
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-re "$pat$gdb_prompt " {
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pass "$test"
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set ok 1
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}
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}
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} {
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pass "$test (skipped)"
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}
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incr level
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}
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}
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# Continue to the signal thrower, capture main's saved-reg info.
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gdb_test "advance thrower" "thrower .* at .*"
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process_saved_regs thrower { main } { }
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# Continue to the signal catcher, check main's saved-reg info, capture
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# catcher's saved-reg info.
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gdb_test "handle SIGSEGV pass print nostop"
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2011-08-14 17:58:40 +02:00
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gdb_test "handle SIGILL pass print nostop"
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2004-11-03 15:46:18 +01:00
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gdb_test "advance catcher" "catcher .* at .*"
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process_saved_regs catcher { sigtramp thrower } { main }
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# Breakpoint at and call the caller function, saved-regs of main and
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# catcher, capture caller's registers.
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gdb_test "break caller"
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gdb_test "call caller (1,2,3,4,5,6,7,8)"
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process_saved_regs caller { dummy catcher } { sigtramp thrower main }
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# Run to callee, again check everything.
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gdb_test "advance callee" "callee .* at .*"
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process_saved_regs callee { caller } { dummy catcher sigtramp thrower main }
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