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2004-04-05 Andrew Cagney <cagney@redhat.com> 

* gdb.base/sigaltstack.c: New file.
	* gdb.base/sigaltstack.exp: New file.
This commit is contained in:
Andrew Cagney 2004-04-05 21:00:21 +00:00
parent 24d18d3088
commit 44f4de1ac3
3 changed files with 188 additions and 0 deletions
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5
gdb/testsuite/ChangeLog
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2004-04-05 Andrew Cagney <cagney@redhat.com>
* gdb.base/sigaltstack.c: New file.
* gdb.base/sigaltstack.exp: New file.
2004-04-04 Joel Brobecker <brobecker@gnat.com>
* gdb.base/foll-fork.exp: Update the expected output for

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gdb/testsuite/gdb.base/sigaltstack.c Normal file
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/* This testcase is part of GDB, the GNU debugger.
Copyright 2004 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
Please email any bugs, comments, and/or additions to this file to:
bug-gdb@prep.ai.mit.edu */
#include <signal.h>
#include <stdio.h>
#include <sys/time.h>
enum level { MAIN, OUTER, INNER, LEAF, NR_LEVELS };
/* Levels completed flag. */
volatile enum level level = NR_LEVELS;
void catcher (int signal);
void
thrower (enum level next_level, int sig, int itimer, int on_stack)
{
level = next_level;
/* Set up the signal handler. */
{
struct sigaction act;
memset (&act, 0, sizeof (act));
act.sa_handler = catcher;
act.sa_flags |= on_stack;
sigaction (sig, &act, NULL);
}
/* Set up a one-off timer. A timer, rather than SIGSEGV, is used as
after a timer handler finishes the interrupted code can safely
resume. */
{
struct itimerval itime;
memset (&itime, 0, sizeof (itime));
itime.it_value.tv_usec = 250 * 1000;
setitimer (itimer, &itime, NULL);
}
/* Wait. */
while (level != LEAF);
}
void
catcher (int signal)
{
/* Find the next level. */
switch (level)
{
case MAIN:
thrower (OUTER, SIGALRM, ITIMER_REAL, SA_ONSTACK);
break;
case OUTER:
thrower (INNER, SIGVTALRM, ITIMER_VIRTUAL, SA_ONSTACK);
break;
case INNER:
level = LEAF;
return;
}
}
main ()
{
/* Set up the altstack. */
{
static char stack[SIGSTKSZ * NR_LEVELS];
struct sigaltstack alt;
memset (&alt, 0, sizeof (alt));
alt.ss_sp = stack;
alt.ss_size = SIGSTKSZ;
alt.ss_flags = 0;
if (sigaltstack (&alt, NULL) < 0)
{
perror ("sigaltstack");
exit (0);
}
}
level = MAIN;
catcher (0);
}

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gdb/testsuite/gdb.base/sigaltstack.exp Normal file
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# Copyright 2004 Free Software Foundation, Inc.
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
# The program sigaltstack.c creates a backtrace containing nested
# signal handlers on an alternative stack. This in turn leads to a
# non-contiguous (and possibly non-monotonic) backtrace - stack
# address jump at the normal-alt stack boundary.
# This test confirms that GDB can both backtrace through and finish
# such a stack.
if [target_info exists gdb,nosignals] {
verbose "Skipping signals.exp because of nosignals."
continue
}
if $tracelevel then {
strace $tracelevel
}
set prms_id 0
set bug_id 0
set testfile sigaltstack
set srcfile ${testfile}.c
set binfile ${objdir}/${subdir}/${testfile}
if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
untested "Couldn't compile ${module}.c"
return -1
}
# get things started
gdb_exit
gdb_start
gdb_reinitialize_dir $srcdir/$subdir
gdb_load ${binfile}
# Pass all the alarms straight through (but verbosely)
gdb_test "handle SIGALRM print pass nostop"
gdb_test "handle SIGVTALRM print pass nostop"
gdb_test "handle SIGPROF print pass nostop"
# Advance to main
if { ![runto_main] } then {
gdb_suppress_tests;
}
# Stop in handle, when at the inner most level
gdb_test "break catcher if level == INNER"
gdb_test "continue" ".* catcher .*" "continue to catch"
# step off the assignment
gdb_test "next"
# Full backtrace?
send_gdb "bt\n"
gdb_expect_list "backtrace" ".*$gdb_prompt $" {
"\[\r\n\]+.0 \[^\r\n\]* catcher "
"\[\r\n\]+.1 .signal handler called."
"\[\r\n\]+.2 \[^\r\n\]* thrower .next_level=INNER"
"\[\r\n\]+.3 \[^\r\n\]* catcher "
"\[\r\n\]+.4 .signal handler called."
"\[\r\n\]+.5 \[^\r\n\]* thrower .next_level=OUTER"
"\[\r\n\]+.6 \[^\r\n\]* catcher "
"\[\r\n\]+.7 \[^\r\n\]* main .*"
}
# Finish?
gdb_test "finish" "signal handler called." "finish from catch LEAF"
gdb_test "finish" "thrower .next_level=INNER, .*" "finish to throw INNER"
gdb_test "finish" "catcher .*" "finish to catch INNER"
gdb_test "finish" "signal handler called.*" "finish from catch INNER"
gdb_test "finish" "thrower .next_level=OUTER, .*" "finish to OUTER"
gdb_test "finish" "catcher .*" "finish to catch MAIN"
gdb_test "finish" "main .*" "finish to MAIN"