mirror of
https://github.com/MariaDB/server.git
synced 2025-11-03 14:33:32 +03:00
289 lines
7.8 KiB
Perl
289 lines
7.8 KiB
Perl
# -*- cperl -*-
|
|
# Copyright (C) 2004-2006 MySQL AB
|
|
#
|
|
# 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; version 2 of the License.
|
|
#
|
|
# 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
|
|
package My::CoreDump;
|
|
|
|
use strict;
|
|
use Carp;
|
|
use My::Platform;
|
|
|
|
use File::Temp qw/ tempfile tempdir /;
|
|
|
|
my $hint_mysqld; # Last resort guess for executable path
|
|
|
|
# If path in core file is 79 chars we assume it's been truncated
|
|
# Looks like we can still find the full path using 'strings'
|
|
# If that doesn't work, use the hint (mysqld path) as last resort.
|
|
|
|
sub _verify_binpath {
|
|
my ($binary, $core_name)= @_;
|
|
my $binpath;
|
|
|
|
if (length $binary != 79) {
|
|
$binpath= $binary;
|
|
print "Core generated by '$binpath'\n";
|
|
} else {
|
|
# Last occurrence of path ending in /mysql*, cut from first /
|
|
if (`strings '$core_name' | grep "/mysql[^/. ]*\$" | tail -1` =~ /(\/.*)/) {
|
|
$binpath= $1;
|
|
print "Guessing that core was generated by '$binpath'\n";
|
|
} else {
|
|
return unless $hint_mysqld;
|
|
$binpath= $hint_mysqld;
|
|
print "Wild guess that core was generated by '$binpath'\n";
|
|
}
|
|
}
|
|
return $binpath;
|
|
}
|
|
|
|
sub _gdb {
|
|
my ($core_name)= @_;
|
|
|
|
print "\nTrying 'gdb' to get a backtrace\n";
|
|
|
|
return unless -f $core_name;
|
|
|
|
# Find out name of binary that generated core
|
|
`gdb -c '$core_name' --batch 2>&1` =~
|
|
/Core was generated by `([^\s\'\`]+)/;
|
|
my $binary= $1 or return;
|
|
|
|
$binary= _verify_binpath ($binary, $core_name) or return;
|
|
|
|
# Create tempfile containing gdb commands
|
|
my ($tmp, $tmp_name) = tempfile();
|
|
print $tmp
|
|
"bt\n",
|
|
"thread apply all bt\n",
|
|
"quit\n";
|
|
close $tmp or die "Error closing $tmp_name: $!";
|
|
|
|
# Run gdb
|
|
my $gdb_output=
|
|
`gdb '$binary' -c '$core_name' -x '$tmp_name' --batch 2>&1`;
|
|
|
|
unlink $tmp_name or die "Error removing $tmp_name: $!";
|
|
|
|
return if $? >> 8;
|
|
return unless $gdb_output;
|
|
|
|
print <<EOF, $gdb_output, "\n";
|
|
Output from gdb follows. The first stack trace is from the failing thread.
|
|
The following stack traces are from all threads (so the failing one is
|
|
duplicated).
|
|
--------------------------
|
|
EOF
|
|
return 1;
|
|
}
|
|
|
|
|
|
sub _dbx {
|
|
my ($core_name)= @_;
|
|
|
|
print "\nTrying 'dbx' to get a backtrace\n";
|
|
|
|
return unless -f $core_name;
|
|
|
|
# Find out name of binary that generated core
|
|
`echo | dbx - '$core_name' 2>&1` =~
|
|
/Corefile specified executable: "([^"]+)"/;
|
|
my $binary= $1 or return;
|
|
|
|
$binary= _verify_binpath ($binary, $core_name) or return;
|
|
|
|
# Find all threads
|
|
my @thr_ids = `echo threads | dbx '$binary' '$core_name' 2>&1` =~ /t@\d+/g;
|
|
|
|
# Create tempfile containing dbx commands
|
|
my ($tmp, $tmp_name) = tempfile();
|
|
foreach my $thread (@thr_ids) {
|
|
print $tmp "where $thread\n";
|
|
}
|
|
print $tmp "exit\n";
|
|
close $tmp or die "Error closing $tmp_name: $!";
|
|
|
|
# Run dbx
|
|
my $dbx_output=
|
|
`cat '$tmp_name' | dbx '$binary' '$core_name' 2>&1`;
|
|
|
|
unlink $tmp_name or die "Error removing $tmp_name: $!";
|
|
|
|
return if $? >> 8;
|
|
return unless $dbx_output;
|
|
|
|
print <<EOF, $dbx_output, "\n";
|
|
Output from dbx follows. Stack trace is printed for all threads in order,
|
|
above this you should see info about which thread was the failing one.
|
|
----------------------------
|
|
EOF
|
|
return 1;
|
|
}
|
|
|
|
|
|
# Check that Debugging tools for Windows are installed
|
|
sub cdb_check {
|
|
`cdb -? 2>&1`;
|
|
if ($? >> 8)
|
|
{
|
|
print "Cannot find cdb. Please Install Debugging tools for Windows\n";
|
|
print "from http://www.microsoft.com/whdc/devtools/debugging/";
|
|
if($ENV{'ProgramW6432'})
|
|
{
|
|
print "install64bit.mspx (native x64 version)\n";
|
|
}
|
|
else
|
|
{
|
|
print "installx86.mspx\n";
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
sub _cdb {
|
|
my ($core_name)= @_;
|
|
print "\nTrying 'cdb' to get a backtrace\n";
|
|
return unless -f $core_name;
|
|
|
|
# Try to set environment for debugging tools for Windows
|
|
if ($ENV{'PATH'} !~ /Debugging Tools/)
|
|
{
|
|
if ($ENV{'ProgramW6432'})
|
|
{
|
|
# On x64 computer
|
|
$ENV{'PATH'}.= ";".$ENV{'ProgramW6432'}."\\Debugging Tools For Windows (x64)";
|
|
}
|
|
else
|
|
{
|
|
# On x86 computer. Newest versions of Debugging tools are installed in the
|
|
# directory with (x86) suffix, older versions did not have this suffix.
|
|
$ENV{'PATH'}.= ";".$ENV{'ProgramFiles'}."\\Debugging Tools For Windows (x86)";
|
|
$ENV{'PATH'}.= ";".$ENV{'ProgramFiles'}."\\Debugging Tools For Windows";
|
|
}
|
|
}
|
|
|
|
|
|
# Read module list, find out the name of executable and
|
|
# build symbol path (required by cdb if executable was built on
|
|
# different machine)
|
|
my $tmp_name= $core_name.".cdb_lmv";
|
|
`cdb -z $core_name -c \"lmv;q\" > $tmp_name 2>&1`;
|
|
if ($? >> 8)
|
|
{
|
|
unlink($tmp_name);
|
|
# check if cdb is installed and complain if not
|
|
cdb_check();
|
|
return;
|
|
}
|
|
|
|
open(temp,"< $tmp_name");
|
|
my %dirhash=();
|
|
while(<temp>)
|
|
{
|
|
if($_ =~ /Image path\: (.*)/)
|
|
{
|
|
if (rindex($1,'\\') != -1)
|
|
{
|
|
my $dir= substr($1, 0, rindex($1,'\\'));
|
|
$dirhash{$dir}++;
|
|
}
|
|
}
|
|
}
|
|
close(temp);
|
|
unlink($tmp_name);
|
|
|
|
my $image_path= join(";", (keys %dirhash),".");
|
|
|
|
# For better callstacks, setup _NT_SYMBOL_PATH to include
|
|
# OS symbols. Note : Dowloading symbols for the first time
|
|
# can take some minutes
|
|
if (!$ENV{'_NT_SYMBOL_PATH'})
|
|
{
|
|
my $windir= $ENV{'windir'};
|
|
my $symbol_cache= substr($windir ,0, index($windir,'\\'))."\\cdb_symbols";
|
|
|
|
print "OS debug symbols will be downloaded and stored in $symbol_cache.\n";
|
|
print "You can control the location of symbol cache with _NT_SYMBOL_PATH\n";
|
|
print "environment variable. Please refer to Microsoft KB article\n";
|
|
print "http://support.microsoft.com/kb/311503 for details about _NT_SYMBOL_PATH\n";
|
|
print "-------------------------------------------------------------------------\n";
|
|
|
|
$ENV{'_NT_SYMBOL_PATH'}.=
|
|
"srv*".$symbol_cache."*http://msdl.microsoft.com/download/symbols";
|
|
}
|
|
|
|
my $symbol_path= $image_path.";".$ENV{'_NT_SYMBOL_PATH'};
|
|
|
|
|
|
# Run cdb. Use "analyze" extension to print crashing thread stacktrace
|
|
# and "uniqstack" to print other threads
|
|
|
|
my $cdb_cmd = "!sym prompts off; !analyze -v; .ecxr; !for_each_frame dv /t;!uniqstack -p;q";
|
|
my $cdb_output=
|
|
`cdb -c "$cdb_cmd" -z $core_name -i "$image_path" -y "$symbol_path" -t 0 -lines 2>&1`;
|
|
return if $? >> 8;
|
|
return unless $cdb_output;
|
|
|
|
# Remove comments (lines starting with *), stack pointer and frame
|
|
# pointer adresses and offsets to function to make output better readable
|
|
$cdb_output=~ s/^\*.*\n//gm;
|
|
$cdb_output=~ s/^([\:0-9a-fA-F\`]+ )+//gm;
|
|
$cdb_output=~ s/^ChildEBP RetAddr//gm;
|
|
$cdb_output=~ s/^Child\-SP RetAddr Call Site//gm;
|
|
$cdb_output=~ s/\+0x([0-9a-fA-F]+)//gm;
|
|
|
|
print <<EOF, $cdb_output, "\n";
|
|
Output from cdb follows. Faulting thread is printed twice,with and without function parameters
|
|
Search for STACK_TEXT to see the stack trace of
|
|
the faulting thread. Callstacks of other threads are printed after it.
|
|
EOF
|
|
return 1;
|
|
}
|
|
|
|
|
|
sub show {
|
|
my ($class, $core_name, $exe_mysqld)= @_;
|
|
$hint_mysqld= $exe_mysqld;
|
|
|
|
# On Windows, rely on cdb to be there...
|
|
if (IS_WINDOWS)
|
|
{
|
|
_cdb($core_name);
|
|
return;
|
|
}
|
|
|
|
# We try dbx first; gdb itself may coredump if run on a Sun Studio
|
|
# compiled binary on Solaris.
|
|
|
|
my @debuggers =
|
|
(
|
|
\&_dbx,
|
|
\&_gdb,
|
|
# TODO...
|
|
);
|
|
|
|
# Try debuggers until one succeeds
|
|
|
|
foreach my $debugger (@debuggers){
|
|
if ($debugger->($core_name)){
|
|
return;
|
|
}
|
|
}
|
|
return;
|
|
}
|
|
|
|
|
|
1;
|