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132 lines
3.1 KiB
Perl
132 lines
3.1 KiB
Perl
# -*- cperl -*-
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# Copyright (C) 2004-2006 MySQL AB
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; version 2 of the License.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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package My::CoreDump;
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use strict;
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use Carp;
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use My::Platform;
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use File::Temp qw/ tempfile tempdir /;
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sub _gdb {
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my ($core_name)= @_;
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print "\nTrying 'gdb' to get a backtrace\n";
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return unless -f $core_name;
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# Find out name of binary that generated core
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`gdb -c '$core_name' --batch 2>&1` =~
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/Core was generated by `([^\s\'\`]+)/;
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my $binary= $1 or return;
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print "Core generated by '$binary'\n";
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# Create tempfile containing gdb commands
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my ($tmp, $tmp_name) = tempfile();
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print $tmp
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"bt\n",
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"thread apply all bt\n",
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"quit\n";
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close $tmp or die "Error closing $tmp_name: $!";
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# Run gdb
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my $gdb_output=
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`gdb '$binary' -c '$core_name' -x '$tmp_name' --batch 2>&1`;
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unlink $tmp_name or die "Error removing $tmp_name: $!";
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return if $? >> 8;
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return unless $gdb_output;
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print <<EOF, $gdb_output, "\n";
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Output from gdb follows. The first stack trace is from the failing thread.
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The following stack traces are from all threads (so the failing one is
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duplicated).
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--------------------------
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EOF
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return 1;
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}
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sub _dbx {
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my ($core_name)= @_;
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print "\nTrying 'dbx' to get a backtrace\n";
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return unless -f $core_name;
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# Find out name of binary that generated core
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`echo | dbx - '$core_name' 2>&1` =~
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/Corefile specified executable: "([^"]+)"/;
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my $binary= $1 or return;
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print "Core generated by '$binary'\n";
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# Find all threads
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my @thr_ids = `echo threads | dbx '$binary' '$core_name' 2>&1` =~ /t@\d+/g;
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# Create tempfile containing dbx commands
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my ($tmp, $tmp_name) = tempfile();
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foreach my $thread (@thr_ids) {
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print $tmp "where $thread\n";
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}
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print $tmp "exit\n";
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close $tmp or die "Error closing $tmp_name: $!";
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# Run dbx
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my $dbx_output=
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`cat '$tmp_name' | dbx '$binary' '$core_name' 2>&1`;
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unlink $tmp_name or die "Error removing $tmp_name: $!";
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return if $? >> 8;
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return unless $dbx_output;
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print <<EOF, $dbx_output, "\n";
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Output from dbx follows. Stack trace is printed for all threads in order,
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above this you should see info about which thread was the failing one.
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----------------------------
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EOF
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return 1;
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}
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sub show {
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my ($class, $core_name)= @_;
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# We try dbx first; gdb itself may coredump if run on a Sun Studio
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# compiled binary on Solaris.
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my @debuggers =
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(
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\&_dbx,
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\&_gdb,
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# TODO...
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);
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# Try debuggers until one succeeds
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foreach my $debugger (@debuggers){
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if ($debugger->($core_name)){
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return;
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}
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}
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return;
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}
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1;
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