gdb/testsuite/gdb.base/sigaltstack.exp

   1 # Copyright 2004, 2007, 2008, 2009, 2010 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 sigaltstack.c creates a backtrace containing nested
  18 # signal handlers on an alternative stack.  This in turn leads to a
  19 # non-contiguous (and possibly non-monotonic) backtrace - stack
  20 # address jump at the normal-alt stack boundary.
  21
  22 # This test confirms that GDB can both backtrace through and finish
  23 # such a stack.
  24
  25 if [target_info exists gdb,nosignals] {
  26     verbose "Skipping signals.exp because of nosignals."
  27     continue
  28 }
  29
  30 if $tracelevel then {
  31     strace $tracelevel
  32 }
  33
  34
  35 set testfile sigaltstack
  36 set srcfile ${testfile}.c
  37 set binfile ${objdir}/${subdir}/${testfile}
  38 if  { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
  39     untested "Couldn't compile ${srcfile}.c"
  40     return -1
  41 }
  42
  43 # get things started
  44 gdb_exit
  45 gdb_start
  46 gdb_reinitialize_dir $srcdir/$subdir
  47 gdb_load ${binfile}
  48
  49 # Pass all the alarms straight through (but verbosely)
  50 gdb_test "handle SIGALRM print pass nostop"
  51 gdb_test "handle SIGVTALRM print pass nostop"
  52 gdb_test "handle SIGPROF print pass nostop"
  53
  54 # Advance to main
  55 if { ![runto_main] } then {
  56     gdb_suppress_tests;
  57 }
  58
  59 # Stop in handle, when at the inner most level
  60 gdb_test "break catcher if level == INNER"
  61 gdb_test "continue" ".* catcher .*" "continue to catch"
  62 # step off the assignment
  63 gdb_test "next"
  64
  65 # Full backtrace?
  66 send_gdb "bt\n"
  67 gdb_expect_list "backtrace" ".*$gdb_prompt $" {
  68     "\[\r\n\]+.0 \[^\r\n\]* catcher "
  69     "\[\r\n\]+.1  .signal handler called."
  70     "\[\r\n\]+.2 \[^\r\n\]* thrower .next_level=INNER"
  71     "\[\r\n\]+.3 \[^\r\n\]* catcher "
  72     "\[\r\n\]+.4  .signal handler called."
  73     "\[\r\n\]+.5 \[^\r\n\]* thrower .next_level=OUTER"
  74     "\[\r\n\]+.6 \[^\r\n\]* catcher "
  75     "\[\r\n\]+.7 \[^\r\n\]* main .*"
  76 }
  77
  78 proc finish_test { pattern msg } {
  79     global gdb_prompt
  80
  81     gdb_test_multiple "finish" $msg {
  82         -re "Cannot insert breakpoint 0.*${gdb_prompt} $" {
  83             # Some platforms use a special read-only page for signal
  84             # trampolines.  We can't set a breakpoint there, and we
  85             # don't gracefully fall back to single-stepping.
  86             setup_kfail gdb/1736 "i?86-*-linux*"
  87             setup_kfail gdb/1736 "*-*-openbsd*"
  88             fail "$msg (could not set breakpoint)"
  89         }
  90         -re "$pattern.*${gdb_prompt} $" {
  91             pass $msg
  92         }
  93     }
  94 }
  95
  96 # Finish?
  97 finish_test "signal handler called." "finish from catch LEAF"
  98 finish_test "thrower .next_level=INNER, .*" "finish to throw INNER"
  99 finish_test "catcher .*" "finish to catch INNER"
 100 finish_test "signal handler called.*" "finish from catch INNER"
 101 finish_test "thrower .next_level=OUTER, .*" "finish to OUTER"
 102 finish_test "catcher .*" "finish to catch MAIN"
 103 finish_test "main .*" "finish to MAIN"