| 1 | # Copyright 2004-2014 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 | |
| 26 | if [target_info exists gdb,nosignals] { |
| 27 | verbose "Skipping siginfo.exp because of nosignals." |
| 28 | continue |
| 29 | } |
| 30 | |
| 31 | |
| 32 | standard_testfile |
| 33 | |
| 34 | if {[prepare_for_testing $testfile.exp $testfile $srcfile debug]} { |
| 35 | untested $testfile.exp |
| 36 | return -1 |
| 37 | } |
| 38 | |
| 39 | gdb_test "display/i \$pc" |
| 40 | |
| 41 | # Advance to main |
| 42 | if { ![runto_main] } then { |
| 43 | gdb_suppress_tests |
| 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. |
| 52 | gdb_test "break handler" |
| 53 | gdb_test "continue" ".* handler .*" "continue to stepi handler" |
| 54 | gdb_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 |
| 61 | set test "step out of handler" |
| 62 | gdb_test_multiple "step" "${test}" { |
| 63 | -re "Could not insert single-step breakpoint.*$gdb_prompt $" { |
| 64 | setup_kfail gdb/1736 sparc*-*-openbsd* |
| 65 | fail "$test (could not insert single-step breakpoint)" |
| 66 | } |
| 67 | -re "done = 1;.*${gdb_prompt} $" { |
| 68 | send_gdb "$i\n" |
| 69 | exp_continue |
| 70 | } |
| 71 | -re "\} .. handler .*${gdb_prompt} $" { |
| 72 | send_gdb "step\n" |
| 73 | exp_continue |
| 74 | } |
| 75 | -re "$inferior_exited_re normally.*${gdb_prompt} $" { |
| 76 | kfail gdb/1613 "$test (program exited)" |
| 77 | } |
| 78 | -re "(while ..done|return 0).*${gdb_prompt} $" { |
| 79 | # After stepping out of a function /r signal-handler, GDB will |
| 80 | # advance the inferior until it is at the first instruction of |
| 81 | # a code-line. While typically things return to the middle of |
| 82 | # the "while..." (and hence GDB advances the inferior to the |
| 83 | # "return..." line) it is also possible for the return to land |
| 84 | # on the first instruction of "while...". Accept both cases. |
| 85 | pass "$test" |
| 86 | } |
| 87 | } |