binutils-gdb/gdb/testsuite/gdb.base/bigcore.exp

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# Copyright 1992-2017 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 3 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, see <http://www.gnu.org/licenses/>.
# This file is based on corefile.exp which was written by Fred
# Fish. (fnf@cygnus.com)
# Are we on a target board? As of 2004-02-12, GDB didn't have a
# mechanism that would let it efficiently access a remote corefile.
if ![isnative] then {
untested "remote system"
return
}
# Can the system run this test (in particular support sparse
# corefiles)? On systems that lack sparse corefile support this test
# consumes too many resources - gigabytes worth of disk space and
# I/O bandwith.
if { [istarget "*-*-*bsd*"]
|| [istarget "*-*-solaris*"]
|| [istarget "*-*-darwin*"]
|| [istarget "*-*-cygwin*"] } {
untested "kernel lacks sparse corefile support (PR gdb/1551)"
return
}
standard_testfile .c
set corefile [standard_output_file ${binfile}.corefile]
if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
untested "failed to compile"
return -1
}
# Run GDB on the bigcore program up-to where it will dump core.
clean_restart ${binfile}
gdb_test_no_output "set print sevenbit-strings"
gdb_test_no_output "set width 0"
# Get the core into the output directory.
if {![is_remote host]} {
gdb_test "cd [file dirname $corefile]" "Working directory .*" \
"cd to test directory"
}
if { ![runto_main] } then {
gdb_suppress_tests
}
set print_core_line [gdb_get_line_number "Dump core"]
gdb_test "tbreak $print_core_line"
gdb_test continue ".*print_string.*"
gdb_test next ".*0 = 0.*"
# Traverse part of bigcore's linked list of memory chunks (forward or
# backward), saving each chunk's address.
proc extract_heap { dir } {
global gdb_prompt
global expect_out
set heap ""
set test "extract ${dir} heap"
set lim 0
gdb_test_multiple "print heap.${dir}" "$test" {
-re " = \\(struct list \\*\\) 0x0.*$gdb_prompt $" {
pass "$test"
}
-re " = \\(struct list \\*\\) (0x\[0-9a-f\]*).*$gdb_prompt $" {
set heap [concat $heap $expect_out(1,string)]
if { $lim >= 200 } {
pass "$test (stop at $lim)"
} else {
incr lim
send_gdb "print \$.${dir}\n"
exp_continue
}
}
-re ".*$gdb_prompt $" {
fail "$test (entry $lim)"
}
timeout {
fail "$test (timeout)"
}
}
return $heap
}
set next_heap [extract_heap next]
set prev_heap [extract_heap prev]
# Save the total allocated size within GDB so that we can check
# the core size later.
gdb_test_no_output "set \$bytes_allocated = bytes_allocated" "save heap size"
# Now create a core dump
# Rename the core file to "TESTFILE.corefile" rather than just "core",
# to avoid problems with sys admin types that like to regularly prune
# all files named "core" from the system.
# Some systems append "core" to the name of the program; others append
# the name of the program to "core"; still others (like Linux, as of
# May 2003) create cores named "core.PID".
# Save the process ID. Some systems dump the core into core.PID.
set test "grab pid"
gdb_test_multiple "info program" $test {
-re "child process (\[0-9\]+).*$gdb_prompt $" {
set inferior_pid $expect_out(1,string)
pass $test
}
-re "$gdb_prompt $" {
set inferior_pid unknown
pass $test
}
}
# Dump core using SIGABRT
set oldtimeout $timeout
set timeout 600
gdb_test "signal SIGABRT" "Program terminated with signal SIGABRT, .*"
set timeout $oldtimeout
# Find the corefile
set file ""
foreach pat [list core.${inferior_pid} ${testfile}.core core] {
set names [glob -nocomplain [standard_output_file $pat]]
if {[llength $names] == 1} {
set file [lindex $names 0]
remote_exec build "mv $file $corefile"
break
}
}
if { $file == "" } {
untested "can't generate a core file"
return 0
}
# Check that the corefile is plausibly large enough. We're trying to
# detect the case where the operating system has truncated the file
# just before signed wraparound. TCL, unfortunately, has a similar
# problem - so use catch. It can handle the "bad" size but not
# necessarily the "good" one. And we must use GDB for the comparison,
# similarly.
if {[catch {file size $corefile} core_size] == 0} {
set core_ok 0
gdb_test_multiple "print \$bytes_allocated < $core_size" "check core size" {
-re " = 1\r\n$gdb_prompt $" {
pass "check core size"
set core_ok 1
}
-re " = 0\r\n$gdb_prompt $" {
pass "check core size"
set core_ok 0
}
}
} {
# Probably failed due to the TCL build having problems with very
# large values. Since GDB uses a 64-bit off_t (when possible) it
# shouldn't have this problem. Assume that things are going to
# work. Without this assumption the test is skiped on systems
# (such as i386 GNU/Linux with patched kernel) which do pass.
pass "check core size"
set core_ok 1
}
if {! $core_ok} {
untested "check core size (system does not support large corefiles)"
return 0
}
# Now load up that core file
set test "load corefile"
# We use [file tail] because gdb is still "cd"d to the
# output directory.
gdb_test_multiple "core [file tail $corefile]" "$test" {
-re "A program is being debugged already. Kill it. .y or n. " {
send_gdb "y\n"
exp_continue
}
-re "Core was generated by.*$gdb_prompt $" {
pass "$test"
}
}
# Finally, re-traverse bigcore's linked list, checking each chunk's
# address against the executable. Don't use gdb_test_multiple as want
# only one pass/fail. Don't use exp_continue as the regular
# expression involving $heap needs to be re-evaluated for each new
# response.
proc check_heap { dir heap } {
global gdb_prompt
set test "check ${dir} heap"
set ok 1
set lim 0
send_gdb "print heap.${dir}\n"
while { $ok } {
gdb_expect {
-re " = \\(struct list \\*\\) [lindex $heap $lim].*$gdb_prompt $" {
if { $lim >= [llength $heap] } {
pass "$test"
set ok 0
} else {
incr lim
send_gdb "print \$.${dir}\n"
}
}
-re ".*$gdb_prompt $" {
fail "$test (address [lindex $heap $lim])"
set ok 0
}
timeout {
fail "$test (timeout)"
set ok 0
}
}
}
}
check_heap next $next_heap
check_heap prev $prev_heap