gdb/testsuite/gdb.base/sigaltstack.exp

   1 # Copyright 2004-2023 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 require {!target_info exists gdb,nosignals}
  26
  27
  28 standard_testfile .c
  29
  30 if  { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
  31     untested "failed to compile"
  32     return -1
  33 }
  34
  35 # get things started
  36 clean_restart ${binfile}
  37
  38 # Pass all the alarms straight through (but verbosely)
  39 gdb_test "handle SIGALRM print pass nostop"
  40 gdb_test "handle SIGVTALRM print pass nostop"
  41 gdb_test "handle SIGPROF print pass nostop"
  42
  43 # Advance to main
  44 if {![runto_main]} {
  45     return 0
  46 }
  47
  48 # Stop in handle, when at the inner most level
  49 gdb_test "break catcher if level == INNER"
  50 gdb_test "continue" ".* catcher .*" "continue to catch"
  51 # step off the assignment
  52 gdb_test "next"
  53
  54 # Full backtrace?
  55 gdb_test_sequence "bt" "backtrace" {
  56     "\[\r\n\]+.0 \[^\r\n\]* catcher "
  57     "\[\r\n\]+.1  .signal handler called."
  58     "\[\r\n\]+.2 \[^\r\n\]* thrower .next_level=INNER"
  59     "\[\r\n\]+.3 \[^\r\n\]* catcher "
  60     "\[\r\n\]+.4  .signal handler called."
  61     "\[\r\n\]+.5 \[^\r\n\]* thrower .next_level=OUTER"
  62     "\[\r\n\]+.6 \[^\r\n\]* catcher "
  63     "\[\r\n\]+.7 \[^\r\n\]* main "
  64 }
  65
  66 proc finish_test { pattern msg } {
  67     global gdb_prompt
  68
  69     gdb_test_multiple "finish" $msg {
  70         -re "Cannot insert breakpoint 0.*${gdb_prompt} $" {
  71             # Some platforms use a special read-only page for signal
  72             # trampolines.  We can't set a breakpoint there, and we
  73             # don't gracefully fall back to single-stepping.
  74             setup_kfail gdb/8841 "i?86-*-linux*"
  75             setup_kfail gdb/8841 "*-*-openbsd*"
  76             setup_kfail gdb/8841 "nios2-*-linux*"
  77             fail "$msg (could not set breakpoint)"
  78         }
  79         -re "$pattern.*${gdb_prompt} $" {
  80             pass $msg
  81         }
  82     }
  83 }
  84
  85 # Finish?
  86 finish_test "signal handler called." "finish from catch LEAF"
  87 finish_test "thrower .next_level=INNER, .*" "finish to throw INNER"
  88 finish_test "catcher .*" "finish to catch INNER"
  89 finish_test "signal handler called.*" "finish from catch INNER"
  90 finish_test "thrower .next_level=OUTER, .*" "finish to OUTER"
  91 finish_test "catcher .*" "finish to catch MAIN"
  92 finish_test "main .*" "finish to MAIN"