2004-07-06 Andrew Cagney <cagney@gnu.org>
* gdb.base/sigbpt.exp, gdb.base/sigbpt.c: New test.
This commit is contained in:
Andrew Cagney
parent
ee28ca0fd6
commit
45a83408cd
@ -1,3 +1,7 @@
|
||||
2004-07-06 Andrew Cagney <cagney@gnu.org>
|
||||
|
||||
* gdb.base/sigbpt.exp, gdb.base/sigbpt.c: New test.
|
||||
|
||||
2004-07-02 Michael Chastain <mec.gnu@mindspring.com>
|
||||
|
||||
* lib/compiler.c: Accept __HP_CXD_SPP for old hp ansi c compiler.
|
||||
|
||||
53
gdb/testsuite/gdb.base/sigbpt.c
Normal file
53
gdb/testsuite/gdb.base/sigbpt.c
Normal file
@ -0,0 +1,53 @@
|
||||
/* 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. */
|
||||
|
||||
#include <signal.h>
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
|
||||
extern void
|
||||
keeper (int sig)
|
||||
{
|
||||
}
|
||||
|
||||
volatile long v1 = 0;
|
||||
volatile long v2 = 0;
|
||||
volatile long v3 = 0;
|
||||
|
||||
extern long
|
||||
bowler (void)
|
||||
{
|
||||
/* Try to read address zero. Do it in a slightly convoluted way so
|
||||
that more than one instruction is used. */
|
||||
return *(char *) (v1 + v2 + v3);
|
||||
}
|
||||
|
||||
int
|
||||
main ()
|
||||
{
|
||||
static volatile int i;
|
||||
|
||||
struct sigaction act;
|
||||
memset (&act, 0, sizeof act);
|
||||
act.sa_handler = keeper;
|
||||
sigaction (SIGSEGV, &act, NULL);
|
||||
|
||||
bowler ();
|
||||
return 0;
|
||||
}
|
||||
263
gdb/testsuite/gdb.base/sigbpt.exp
Normal file
263
gdb/testsuite/gdb.base/sigbpt.exp
Normal file
@ -0,0 +1,263 @@
|
||||
# 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.
|
||||
|
||||
# Check that GDB can and only executes single instructions when
|
||||
# stepping through a sequence of breakpoints interleaved by a signal
|
||||
# handler.
|
||||
|
||||
# This test is known to tickle the following problems: kernel letting
|
||||
# the inferior execute both the system call, and the instruction
|
||||
# following, when single-stepping a system call; kernel failing to
|
||||
# propogate the single-step state when single-stepping the sigreturn
|
||||
# system call, instead resuming the inferior at full speed; GDB
|
||||
# doesn't know how to software single-step across a sigreturn
|
||||
# instruction. Since the kernel problems can be "fixed" using
|
||||
# software single-step this is KFAILed rather than XFAILed.
|
||||
|
||||
if $tracelevel {
|
||||
strace $tracelevel
|
||||
}
|
||||
|
||||
set prms_id 0
|
||||
set bug_id 0
|
||||
|
||||
set testfile "sigbpt"
|
||||
set srcfile ${testfile}.c
|
||||
set binfile ${objdir}/${subdir}/${testfile}
|
||||
if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
|
||||
gdb_suppress_entire_file "Testcase compile failed, so all tests in this file will automatically fail."
|
||||
}
|
||||
|
||||
gdb_exit
|
||||
gdb_start
|
||||
gdb_reinitialize_dir $srcdir/$subdir
|
||||
gdb_load ${binfile}
|
||||
|
||||
#
|
||||
# Run to `main' where we begin our tests.
|
||||
#
|
||||
|
||||
if ![runto_main] then {
|
||||
gdb_suppress_tests
|
||||
}
|
||||
|
||||
# If we can examine what's at memory address 0, it is possible that we
|
||||
# could also execute it. This could probably make us run away,
|
||||
# executing random code, which could have all sorts of ill effects,
|
||||
# especially on targets without an MMU. Don't run the tests in that
|
||||
# case.
|
||||
|
||||
send_gdb "x 0\n"
|
||||
gdb_expect {
|
||||
-re "0x0:.*Cannot access memory at address 0x0.*$gdb_prompt $" { }
|
||||
-re "0x0:.*Error accessing memory address 0x0.*$gdb_prompt $" { }
|
||||
-re ".*$gdb_prompt $" {
|
||||
untested "Memory at address 0 is possibly executable"
|
||||
return
|
||||
}
|
||||
}
|
||||
|
||||
gdb_test "break keeper"
|
||||
|
||||
# Run to bowler, and then single step until there's a SIGSEGV. Record
|
||||
# the address of each single-step instruction (up to and including the
|
||||
# instruction that causes the SIGSEGV) in bowler_addrs, and the address
|
||||
# of the actual SIGSEGV in segv_addr.
|
||||
|
||||
set bowler_addrs bowler
|
||||
gdb_test {display/i $pc}
|
||||
gdb_test "advance *bowler" "bowler.*" "advance to the bowler"
|
||||
set test "stepping to SIGSEGV"
|
||||
gdb_test_multiple "stepi" "$test" {
|
||||
-re "Program received signal SIGSEGV.*pc *(0x\[0-9a-f\]*).*$gdb_prompt $" {
|
||||
set segv_addr $expect_out(1,string)
|
||||
pass "$test"
|
||||
}
|
||||
-re " .*pc *(0x\[0-9a-f\]*).*bowler.*$gdb_prompt $" {
|
||||
set bowler_addrs [concat $expect_out(1,string) $bowler_addrs]
|
||||
send_gdb "stepi\n"
|
||||
exp_continue
|
||||
}
|
||||
}
|
||||
|
||||
# Now record the address of the instruction following the faulting
|
||||
# instruction in bowler_addrs.
|
||||
|
||||
set test "get insn after fault"
|
||||
gdb_test_multiple {x/2i $pc} "$test" {
|
||||
-re "(0x\[0-9a-f\]*).*bowler.*(0x\[0-9a-f\]*).*bowler.*$gdb_prompt $" {
|
||||
set bowler_addrs [concat $expect_out(2,string) $bowler_addrs]
|
||||
pass "$test"
|
||||
}
|
||||
}
|
||||
|
||||
# Procedures for returning the address of the instruction before, at
|
||||
# and after, the faulting instruction.
|
||||
|
||||
proc before_segv { } {
|
||||
global bowler_addrs
|
||||
return [lindex $bowler_addrs 2]
|
||||
}
|
||||
|
||||
proc at_segv { } {
|
||||
global bowler_addrs
|
||||
return [lindex $bowler_addrs 1]
|
||||
}
|
||||
|
||||
proc after_segv { } {
|
||||
global bowler_addrs
|
||||
return [lindex $bowler_addrs 0]
|
||||
}
|
||||
|
||||
# Check that the address table and SIGSEGV correspond.
|
||||
|
||||
set test "Verify that SIGSEGV occurs at the last STEPI insn"
|
||||
if {[string compare $segv_addr [at_segv]] == 0} {
|
||||
pass "$test"
|
||||
} else {
|
||||
fail "$test ($segv_addr [at_segv])"
|
||||
}
|
||||
|
||||
# Check that the inferior is correctly single stepped all the way back
|
||||
# to a faulting instruction.
|
||||
|
||||
proc stepi_out { name args } {
|
||||
global gdb_prompt
|
||||
|
||||
# Set SIGSEGV to pass+nostop and then run the inferior all the way
|
||||
# through to the signal handler. With the handler is reached,
|
||||
# disable SIGSEGV, ensuring that further signals stop the
|
||||
# inferior. Stops a SIGSEGV infinite loop when a broke system
|
||||
# keeps re-executing the faulting instruction.
|
||||
rerun_to_main
|
||||
gdb_test "handle SIGSEGV nostop print pass" "" "pass SIGSEGV; $name"
|
||||
gdb_test "continue" "keeper.*" "continue to keeper; $name"
|
||||
gdb_test "handle SIGSEGV stop print nopass" "" "nopass SIGSEGV; $name"
|
||||
|
||||
# Insert all the breakpoints. To avoid the need to step over
|
||||
# these instructions, this is delayed until after the keeper has
|
||||
# been reached.
|
||||
for {set i 0} {$i < [llength $args]} {incr i} {
|
||||
gdb_test "break [lindex $args $i]" "Breakpoint.*" \
|
||||
"set breakpoint $i of [llength $args]; $name"
|
||||
}
|
||||
|
||||
# Single step our way out of the keeper, through the signal
|
||||
# trampoline, and back to the instruction that faulted.
|
||||
set test "stepi out of handler; $name"
|
||||
gdb_test_multiple "stepi" "$test" {
|
||||
-re "keeper.*$gdb_prompt $" {
|
||||
send_gdb "stepi\n"
|
||||
exp_continue
|
||||
}
|
||||
-re "signal handler.*$gdb_prompt $" {
|
||||
send_gdb "stepi\n"
|
||||
exp_continue
|
||||
}
|
||||
-re "Program received signal SIGSEGV.*$gdb_prompt $" {
|
||||
kfail gdb/1702 "$test (executed fault insn)"
|
||||
}
|
||||
-re "Breakpoint.*pc *[at_segv] .*bowler.*$gdb_prompt $" {
|
||||
pass "$test (at breakpoint)"
|
||||
}
|
||||
-re "Breakpoint.*pc *[after_segv] .*bowler.*$gdb_prompt $" {
|
||||
kfail gdb/1702 "$test (executed breakpoint)"
|
||||
}
|
||||
-re "pc *[at_segv] .*bowler.*$gdb_prompt $" {
|
||||
pass "$test"
|
||||
}
|
||||
-re "pc *[after_segv] .*bowler.*$gdb_prompt $" {
|
||||
kfail gdb/1702 "$test (skipped fault insn)"
|
||||
}
|
||||
}
|
||||
|
||||
# Clear any breakpoints
|
||||
for {set i 0} {$i < [llength $args]} {incr i} {
|
||||
gdb_test "clear [lindex $args $i]" "Deleted .*" \
|
||||
"clear breakpoint $i of [llength $args]; $name"
|
||||
}
|
||||
}
|
||||
|
||||
# Let a signal handler exit, returning to a breakpoint instruction
|
||||
# inserted at the original fault instruction. Check that the
|
||||
# breakpoint is hit, and that single stepping off that breakpoint
|
||||
# executes the underlying fault instruction causing a SIGSEGV.
|
||||
|
||||
proc cont_out { name args } {
|
||||
global gdb_prompt
|
||||
|
||||
# Set SIGSEGV to pass+nostop and then run the inferior all the way
|
||||
# through to the signal handler. With the handler is reached,
|
||||
# disable SIGSEGV, ensuring that further signals stop the
|
||||
# inferior. Stops a SIGSEGV infinite loop when a broke system
|
||||
# keeps re-executing the faulting instruction.
|
||||
rerun_to_main
|
||||
gdb_test "handle SIGSEGV nostop print pass" "" "pass SIGSEGV; $name"
|
||||
gdb_test "continue" "keeper.*" "continue to keeper; $name"
|
||||
gdb_test "handle SIGSEGV stop print nopass" "" "nopass SIGSEGV; $name"
|
||||
|
||||
# Insert all the breakpoints. To avoid the need to step over
|
||||
# these instructions, this is delayed until after the keeper has
|
||||
# been reached. Always set a breakpoint at the signal trampoline
|
||||
# instruction.
|
||||
set args [concat $args "*[at_segv]"]
|
||||
for {set i 0} {$i < [llength $args]} {incr i} {
|
||||
gdb_test "break [lindex $args $i]" "Breakpoint.*" \
|
||||
"set breakpoint $i of [llength $args]; $name"
|
||||
}
|
||||
|
||||
# Let the handler return, it should "appear to hit" the breakpoint
|
||||
# inserted at the faulting instruction. Note that the breakpoint
|
||||
# instruction wasn't executed, rather the inferior was SIGTRAPed
|
||||
# with the PC at the breakpoint.
|
||||
gdb_test "continue" "Breakpoint.*pc *[at_segv] .*" \
|
||||
"continue to breakpoint at fault; $name"
|
||||
|
||||
# Now single step the faulted instrction at that breakpoint.
|
||||
gdb_test "stepi" \
|
||||
"Program received signal SIGSEGV.*pc *[at_segv] .*" \
|
||||
"stepi fault; $name"
|
||||
|
||||
# Clear any breakpoints
|
||||
for {set i 0} {$i < [llength $args]} {incr i} {
|
||||
gdb_test "clear [lindex $args $i]" "Deleted .*" \
|
||||
"clear breakpoint $i of [llength $args]; $name"
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
|
||||
|
||||
# Try to confuse DECR_PC_AFTER_BREAK architectures by scattering
|
||||
# breakpoints around the faulting address. In all cases the inferior
|
||||
# should single-step out of the signal trampoline halting (but not
|
||||
# executing) the fault instruction.
|
||||
|
||||
stepi_out "stepi"
|
||||
stepi_out "stepi bp before segv" "*[before_segv]"
|
||||
stepi_out "stepi bp at segv" "*[at_segv]"
|
||||
stepi_out "stepi bp before and at segv" "*[at_segv]" "*[before_segv]"
|
||||
|
||||
|
||||
# Try to confuse DECR_PC_AFTER_BREAK architectures by scattering
|
||||
# breakpoints around the faulting address. In all cases the inferior
|
||||
# should exit the signal trampoline halting at the breakpoint that
|
||||
# replaced the fault instruction.
|
||||
cont_out "cont"
|
||||
cont_out "cont bp after segv" "*[before_segv]"
|
||||
cont_out "cont bp before and after segv" "*[before_segv]" "*[after_segv]"
|
||||
Loading…
Reference in New Issue
Block a user