158 lines
5 KiB
Text
158 lines
5 KiB
Text
# Copyright 2004, 2007-2012 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 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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if $tracelevel then {
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strace $tracelevel
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}
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set testfile savedregs
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set srcfile ${testfile}.c
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set binfile ${objdir}/${subdir}/${testfile}
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if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
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untested "Couldn't compile ${module}.c"
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return -1
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}
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# get things started
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gdb_exit
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gdb_start
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gdb_reinitialize_dir $srcdir/$subdir
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gdb_load ${binfile}
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# Advance to main
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if { ![runto_main] } {
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gdb_suppress_tests;
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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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set test "Get $func info frame"
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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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set pat "Stack frame at .*"
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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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set pat "Stack frame at .* Saved registers:.*"
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}
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default {
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set pat "Stack frame at .* in $func .* Saved registers:.*"
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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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gdb_test "handle SIGILL pass print nostop"
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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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