gdb/testsuite/gdb.base/siginfo.exp

   1 # Copyright 2004-2016 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 "failed to prepare" $testfile $srcfile debug]} {
  35     return -1
  36 }
  37
  38 gdb_test "display/i \$pc"
  39
  40 # Advance to main
  41 if { ![runto_main] } then {
  42     gdb_suppress_tests
  43 }
  44
  45 # Pass all the alarms straight through (but verbosely)
  46 # gdb_test "handle SIGALRM print pass nostop"
  47 # gdb_test "handle SIGVTALRM print pass nostop"
  48 # gdb_test "handle SIGPROF print pass nostop"
  49
  50 # Run to the signal handler, validate the backtrace.
  51 gdb_test "break handler"
  52 gdb_test "continue" ".* handler .*" "continue to stepi handler"
  53 gdb_test_sequence "bt" "backtrace for nexti" {
  54     "\[\r\n\]+.0 \[^\r\n\]* handler "
  55     "\[\r\n\]+.1  .signal handler called."
  56     "\[\r\n\]+.2 \[^\r\n\]* main "
  57 }
  58
  59 # Check that GDB can step the inferior back to main
  60 set test "step out of handler"
  61 gdb_test_multiple "step" "${test}" {
  62     -re "Could not insert single-step breakpoint.*$gdb_prompt $" {
  63         setup_kfail gdb/8841 sparc*-*-openbsd*
  64         fail "$test (could not insert single-step breakpoint)"
  65     }
  66     -re "Cannot insert breakpoint.*Cannot access memory.*$gdb_prompt $" {
  67         setup_kfail gdb/8841 "nios2*-*-linux*"
  68         fail "$test (could not insert single-step breakpoint)"
  69     }
  70     -re "done = 1;.*${gdb_prompt} $" {
  71         send_gdb "$i\n"
  72         exp_continue
  73     }
  74     -re "\} .. handler .*${gdb_prompt} $" {
  75         send_gdb "step\n"
  76         exp_continue
  77     }
  78     -re "$inferior_exited_re normally.*${gdb_prompt} $" {
  79         kfail gdb/1613 "$test (program exited)"
  80     }
  81     -re "(while ..done|return 0).*${gdb_prompt} $" {
  82         # After stepping out of a function /r signal-handler, GDB will
  83         # advance the inferior until it is at the first instruction of
  84         # a code-line.  While typically things return to the middle of
  85         # the "while..." (and hence GDB advances the inferior to the
  86         # "return..." line) it is also possible for the return to land
  87         # on the first instruction of "while...".  Accept both cases.
  88         pass "$test"
  89     }
  90 }