gdb/testsuite/gdb.base/siginfo.exp

   1 # Copyright 2004, 2007, 2008, 2009, 2010, 2011 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 signals.exp because of nosignals."
  28     continue
  29 }
  30
  31 if $tracelevel then {
  32     strace $tracelevel
  33 }
  34
  35
  36 set testfile siginfo
  37 set srcfile ${testfile}.c
  38 set binfile ${objdir}/${subdir}/${testfile}
  39 if  { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
  40     untested "Couldn't compile ${srcfile}.c"
  41     return -1
  42 }
  43
  44 # get things started
  45 gdb_exit
  46 gdb_start
  47 gdb_reinitialize_dir $srcdir/$subdir
  48 gdb_load ${binfile}
  49
  50 gdb_test "display/i \$pc"
  51
  52 # Advance to main
  53 if { ![runto_main] } then {
  54     gdb_suppress_tests;
  55 }
  56
  57 # Pass all the alarms straight through (but verbosely)
  58 # gdb_test "handle SIGALRM print pass nostop"
  59 # gdb_test "handle SIGVTALRM print pass nostop"
  60 # gdb_test "handle SIGPROF print pass nostop"
  61
  62 # Run to the signal handler, validate the backtrace.
  63 gdb_test "break handler"
  64 gdb_test "continue" ".* handler .*" "continue to stepi handler"
  65 gdb_test_sequence "bt" "backtrace for nexti" {
  66     "\[\r\n\]+.0 \[^\r\n\]* handler "
  67     "\[\r\n\]+.1  .signal handler called."
  68     "\[\r\n\]+.2 \[^\r\n\]* main "
  69 }
  70
  71 # Check that GDB can step the inferior back to main
  72 set test "step out of handler"
  73 gdb_test_multiple "step" "${test}" {
  74     -re "Could not insert single-step breakpoint.*$gdb_prompt $" {
  75         setup_kfail gdb/1736 sparc*-*-openbsd*
  76         fail "$test (could not insert single-step breakpoint)"
  77     }
  78     -re "done = 1;.*${gdb_prompt} $" {
  79         send_gdb "$i\n"
  80         exp_continue
  81     }
  82     -re "\} .. handler .*${gdb_prompt} $" {
  83         send_gdb "step\n"
  84         exp_continue
  85     }
  86     -re "$inferior_exited_re normally.*${gdb_prompt} $" {
  87         kfail gdb/1613 "$test (program exited)"
  88     }
  89     -re "(while ..done|return 0).*${gdb_prompt} $" {
  90         # After stepping out of a function /r signal-handler, GDB will
  91         # advance the inferior until it is at the first instruction of
  92         # a code-line.  While typically things return to the middle of
  93         # the "while..." (and hence GDB advances the inferior to the
  94         # "return..." line) it is also possible for the return to land
  95         # on the first instruction of "while...".  Accept both cases.
  96         pass "$test"
  97     }
  98 }