1# Copyright 2004-2021 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 siginfo.exp because of nosignals." 28 continue 29} 30 31 32standard_testfile 33 34if {[prepare_for_testing "failed to prepare" $testfile $srcfile debug]} { 35 return -1 36} 37 38gdb_test "display/i \$pc" 39 40# Advance to main 41if ![runto_main] then { 42 fail "can't run to main" 43 return 0 44} 45 46# Pass all the alarms straight through (but verbosely) 47# gdb_test "handle SIGALRM print pass nostop" 48# gdb_test "handle SIGVTALRM print pass nostop" 49# gdb_test "handle SIGPROF print pass nostop" 50 51# Run to the signal handler, validate the backtrace. 52gdb_test "break handler" 53gdb_test "continue" ".* handler .*" "continue to stepi handler" 54gdb_test_sequence "bt" "backtrace for nexti" { 55 "\[\r\n\]+.0 \[^\r\n\]* handler " 56 "\[\r\n\]+.1 .signal handler called." 57 "\[\r\n\]+.2 \[^\r\n\]* main " 58} 59 60# Check that GDB can step the inferior back to main 61set test "step out of handler" 62gdb_test_multiple "step" "${test}" { 63 -re "Could not insert single-step breakpoint.*$gdb_prompt $" { 64 setup_kfail gdb/8841 sparc*-*-openbsd* 65 fail "$test (could not insert single-step breakpoint)" 66 } 67 -re "Cannot insert breakpoint.*Cannot access memory.*$gdb_prompt $" { 68 setup_kfail gdb/8841 "nios2*-*-linux*" 69 fail "$test (could not insert single-step breakpoint)" 70 } 71 -re "done = 1;.*${gdb_prompt} $" { 72 send_gdb "$i\n" 73 exp_continue 74 } 75 -re "\} .. handler .*${gdb_prompt} $" { 76 send_gdb "step\n" 77 exp_continue 78 } 79 -re "$inferior_exited_re normally.*${gdb_prompt} $" { 80 kfail gdb/1613 "$test (program exited)" 81 } 82 -re "(while ..done|return 0).*${gdb_prompt} $" { 83 # After stepping out of a function /r signal-handler, GDB will 84 # advance the inferior until it is at the first instruction of 85 # a code-line. While typically things return to the middle of 86 # the "while..." (and hence GDB advances the inferior to the 87 # "return..." line) it is also possible for the return to land 88 # on the first instruction of "while...". Accept both cases. 89 pass "$test" 90 } 91} 92