gdb/testsuite/gdb.base/sigaltstack.exp

   1 # Copyright 2004-2021 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 sigaltstack.exp because of nosignals."
  27     continue
  28 }
  29
  30
  31 standard_testfile .c
  32
  33 if  { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
  34     untested "failed to compile"
  35     return -1
  36 }
  37
  38 # get things started
  39 clean_restart ${binfile}
  40
  41 # Pass all the alarms straight through (but verbosely)
  42 gdb_test "handle SIGALRM print pass nostop"
  43 gdb_test "handle SIGVTALRM print pass nostop"
  44 gdb_test "handle SIGPROF print pass nostop"
  45
  46 # Advance to main
  47 if ![runto_main] then {
  48     fail "can't run to main"
  49     return 0
  50 }
  51
  52 # Stop in handle, when at the inner most level
  53 gdb_test "break catcher if level == INNER"
  54 gdb_test "continue" ".* catcher .*" "continue to catch"
  55 # step off the assignment
  56 gdb_test "next"
  57
  58 # Full backtrace?
  59 gdb_test_sequence "bt" "backtrace" {
  60     "\[\r\n\]+.0 \[^\r\n\]* catcher "
  61     "\[\r\n\]+.1  .signal handler called."
  62     "\[\r\n\]+.2 \[^\r\n\]* thrower .next_level=INNER"
  63     "\[\r\n\]+.3 \[^\r\n\]* catcher "
  64     "\[\r\n\]+.4  .signal handler called."
  65     "\[\r\n\]+.5 \[^\r\n\]* thrower .next_level=OUTER"
  66     "\[\r\n\]+.6 \[^\r\n\]* catcher "
  67     "\[\r\n\]+.7 \[^\r\n\]* main "
  68 }
  69
  70 proc finish_test { pattern msg } {
  71     global gdb_prompt
  72
  73     gdb_test_multiple "finish" $msg {
  74         -re "Cannot insert breakpoint 0.*${gdb_prompt} $" {
  75             # Some platforms use a special read-only page for signal
  76             # trampolines.  We can't set a breakpoint there, and we
  77             # don't gracefully fall back to single-stepping.
  78             setup_kfail gdb/8841 "i?86-*-linux*"
  79             setup_kfail gdb/8841 "*-*-openbsd*"
  80             setup_kfail gdb/8841 "nios2-*-linux*"
  81             fail "$msg (could not set breakpoint)"
  82         }
  83         -re "$pattern.*${gdb_prompt} $" {
  84             pass $msg
  85         }
  86     }
  87 }
  88
  89 # Finish?
  90 finish_test "signal handler called." "finish from catch LEAF"
  91 finish_test "thrower .next_level=INNER, .*" "finish to throw INNER"
  92 finish_test "catcher .*" "finish to catch INNER"
  93 finish_test "signal handler called.*" "finish from catch INNER"
  94 finish_test "thrower .next_level=OUTER, .*" "finish to OUTER"
  95 finish_test "catcher .*" "finish to catch MAIN"
  96 finish_test "main .*" "finish to MAIN"