gdb/testsuite/gdb.base/sigaltstack.exp

   1 # Copyright 2004, 2007, 2008, 2009 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 set prms_id 0
  35 set bug_id 0
  36
  37 set testfile sigaltstack
  38 set srcfile ${testfile}.c
  39 set binfile ${objdir}/${subdir}/${testfile}
  40 if  { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
  41     untested "Couldn't compile ${srcfile}.c"
  42     return -1
  43 }
  44
  45 # get things started
  46 gdb_exit
  47 gdb_start
  48 gdb_reinitialize_dir $srcdir/$subdir
  49 gdb_load ${binfile}
  50
  51 # Pass all the alarms straight through (but verbosely)
  52 gdb_test "handle SIGALRM print pass nostop"
  53 gdb_test "handle SIGVTALRM print pass nostop"
  54 gdb_test "handle SIGPROF print pass nostop"
  55
  56 # Advance to main
  57 if { ![runto_main] } then {
  58     gdb_suppress_tests;
  59 }
  60
  61 # Stop in handle, when at the inner most level
  62 gdb_test "break catcher if level == INNER"
  63 gdb_test "continue" ".* catcher .*" "continue to catch"
  64 # step off the assignment
  65 gdb_test "next"
  66
  67 # Full backtrace?
  68 send_gdb "bt\n"
  69 gdb_expect_list "backtrace" ".*$gdb_prompt $" {
  70     "\[\r\n\]+.0 \[^\r\n\]* catcher "
  71     "\[\r\n\]+.1  .signal handler called."
  72     "\[\r\n\]+.2 \[^\r\n\]* thrower .next_level=INNER"
  73     "\[\r\n\]+.3 \[^\r\n\]* catcher "
  74     "\[\r\n\]+.4  .signal handler called."
  75     "\[\r\n\]+.5 \[^\r\n\]* thrower .next_level=OUTER"
  76     "\[\r\n\]+.6 \[^\r\n\]* catcher "
  77     "\[\r\n\]+.7 \[^\r\n\]* main .*"
  78 }
  79
  80 proc finish_test { pattern msg } {
  81     global gdb_prompt
  82
  83     gdb_test_multiple "finish" $msg {
  84         -re "Cannot insert breakpoint 0.*${gdb_prompt} $" {
  85             # Some platforms use a special read-only page for signal
  86             # trampolines.  We can't set a breakpoint there, and we
  87             # don't gracefully fall back to single-stepping.
  88             setup_kfail "i?86-*-linux*" gdb/1736
  89             setup_kfail "*-*-openbsd*" gdb/1736
  90             fail "$msg (could not set breakpoint)"
  91         }
  92         -re "$pattern.*${gdb_prompt} $" {
  93             pass $msg
  94         }
  95     }
  96 }
  97
  98 # Finish?
  99 finish_test "signal handler called." "finish from catch LEAF"
 100 finish_test "thrower .next_level=INNER, .*" "finish to throw INNER"
 101 finish_test "catcher .*" "finish to catch INNER"
 102 finish_test "signal handler called.*" "finish from catch INNER"
 103 finish_test "thrower .next_level=OUTER, .*" "finish to OUTER"
 104 finish_test "catcher .*" "finish to catch MAIN"
 105 finish_test "main .*" "finish to MAIN"