| 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" |