1# Copyright 2004, 2007 Free Software Foundation, Inc. 2 3# This program is free software; you can redistribute it and/or modify 4# it under the terms of the GNU General Public License as published by 5# the Free Software Foundation; either version 3 of the License, or 6# (at your option) any later version. 7# 8# This program is distributed in the hope that it will be useful, 9# but WITHOUT ANY WARRANTY; without even the implied warranty of 10# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 11# GNU General Public License for more details. 12# 13# You should have received a copy of the GNU General Public License 14# along with this program. If not, see <http://www.gnu.org/licenses/>. 15 16 17# The program siginfo.c creates a backtrace containing a signal 18# handler registered using sigaction's sa_sigaction / SA_SIGINFO. 19# Some OS's (e.g., GNU/Linux) use different signal trampolines for 20# sa_sigaction and sa_handler. 21 22# This test first confirms that GDB can backtrace through the 23# alternative sa_sigaction signal handler, and second that GDB can 24# nexti/stepi out of such a handler. 25 26if [target_info exists gdb,nosignals] { 27 verbose "Skipping signals.exp because of nosignals." 28 continue 29} 30 31if $tracelevel then { 32 strace $tracelevel 33} 34 35set prms_id 0 36set bug_id 0 37 38set testfile siginfo 39set srcfile ${testfile}.c 40set binfile ${objdir}/${subdir}/${testfile} 41if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } { 42 untested "Couldn't compile ${srcfile}.c" 43 return -1 44} 45 46# get things started 47gdb_exit 48gdb_start 49gdb_reinitialize_dir $srcdir/$subdir 50gdb_load ${binfile} 51 52gdb_test "display/i \$pc" 53 54# Advance to main 55if { ![runto_main] } then { 56 gdb_suppress_tests; 57} 58 59# Pass all the alarms straight through (but verbosely) 60# gdb_test "handle SIGALRM print pass nostop" 61# gdb_test "handle SIGVTALRM print pass nostop" 62# gdb_test "handle SIGPROF print pass nostop" 63 64# Run to the signal handler, validate the backtrace. 65gdb_test "break handler" 66gdb_test "continue" ".* handler .*" "continue to stepi handler" 67send_gdb "bt\n" 68gdb_expect_list "backtrace for nexti" ".*$gdb_prompt $" { 69 "\[\r\n\]+.0 \[^\r\n\]* handler " 70 "\[\r\n\]+.1 .signal handler called." 71 "\[\r\n\]+.2 \[^\r\n\]* main .*" 72} 73 74# Check that GDB can step the inferior back to main 75set test "step out of handler" 76gdb_test_multiple "step" "${test}" { 77 -re "Could not insert single-step breakpoint.*$gdb_prompt $" { 78 setup_kfail sparc*-*-openbsd* gdb/1736 79 fail "$test (could not insert single-step breakpoint)" 80 } 81 -re "done = 1;.*${gdb_prompt} $" { 82 send_gdb "$i\n" 83 exp_continue 84 } 85 -re "\} .. handler .*${gdb_prompt} $" { 86 send_gdb "step\n" 87 exp_continue 88 } 89 -re "Program exited normally.*${gdb_prompt} $" { 90 kfail gdb/1613 "$test (program exited)" 91 } 92 -re "(while ..done|return 0).*${gdb_prompt} $" { 93 # After stepping out of a function /r signal-handler, GDB will 94 # advance the inferior until it is at the first instruction of 95 # a code-line. While typically things return to the middle of 96 # the "while..." (and hence GDB advances the inferior to the 97 # "return..." line) it is also possible for the return to land 98 # on the first instruction of "while...". Accept both cases. 99 pass "$test" 100 } 101} 102