我一直在尝试使用perl 5和
XML :: Lib
XML(我现在维护的)来调试内存损坏.现在这是我得到的：
shlomif@lap:~/progs/perl/cpan/XML/LibXML/bugs/perl-xml-libxml-bugs/XML-LibXML-reader-segfault$make test XML_CATALOG_FILES="`pwd`/sgml-lib/catalog.xml" perl find_ascii_quotes.pl index.html *** glibc detected *** perl: corrupted double-linked list: 0x0000000001474b40 *** ^Cmake: *** [test] Interrupt
然后perl进程被卡住,不会返回到shell.事实上,Perl进程停止中断我的流程,我正在寻找一种方法来使进程崩溃或其他任何事情,而不是挂在那里. gdb报告以下内容.可以在its Mercurial repository中找到有关的代码(只是运行“make test”),而我在x86-64上的Mandriva Linux Cooker上.
任何帮助将不胜感激.
ader-segfault$gdb --command=cmds.gdb /usr/bin/perl
GNU gdb (GDB) 7.1-5 (Mandriva Linux release 2011.0)
Copyright (C) 2010 Free Software Foundation,Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY,to the extent permitted by law. Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-mandriva-linux-gnu".
For bug reporting instructions,please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /usr/bin/perl...
warning: the debug information found in "/usr/lib/debug//usr/bin/perl5.12.3.debug" does not match "/usr/bin/perl" (CRC mismatch).
warning: the debug information found in "/usr/lib/debug/usr/bin/perl5.12.3.debug" does not match "/usr/bin/perl" (CRC mismatch).
(no debugging symbols found)...done.
warning: the debug information found in "/usr/lib/debug//usr/lib/perl5/5.12.3/x86_64-linux-thread-multi/CORE/libperl.so.debug" does not match "/usr/lib/perl5/5.12.3/x86_64-linux-thread-multi/CORE/libperl.so" (CRC mismatch).
warning: the debug information found in "/usr/lib/debug/usr/lib/perl5/5.12.3/x86_64-linux-thread-multi/CORE/libperl.so.debug" does not match "/usr/lib/perl5/5.12.3/x86_64-linux-thread-multi/CORE/libperl.so" (CRC mismatch).
[Thread debugging using libthread_db enabled]
warning: the debug information found in "/usr/lib/debug//usr/lib/perl5/5.12.3/x86_64-linux-thread-multi/auto/Encode/Encode.so.debug" does not match "/usr/lib/perl5/5.12.3/x86_64-linux-thread-multi/auto/Encode/Encode.so" (CRC mismatch).
warning: the debug information found in "/usr/lib/debug/usr/lib/perl5/5.12.3/x86_64-linux-thread-multi/auto/Encode/Encode.so.debug" does not match "/usr/lib/perl5/5.12.3/x86_64-linux-thread-multi/auto/Encode/Encode.so" (CRC mismatch).
warning: the debug information found in "/usr/lib/debug//usr/lib/perl5/5.12.3/x86_64-linux-thread-multi/auto/Data/Dumper/Dumper.so.debug" does not match "/usr/lib/perl5/5.12.3/x86_64-linux-thread-multi/auto/Data/Dumper/Dumper.so" (CRC mismatch).
warning: the debug information found in "/usr/lib/debug/usr/lib/perl5/5.12.3/x86_64-linux-thread-multi/auto/Data/Dumper/Dumper.so.debug" does not match "/usr/lib/perl5/5.12.3/x86_64-linux-thread-multi/auto/Data/Dumper/Dumper.so" (CRC mismatch).
warning: the debug information found in "/usr/lib/debug//usr/lib/perl5/5.12.3/x86_64-linux-thread-multi/auto/IO/IO.so.debug" does not match "/usr/lib/perl5/5.12.3/x86_64-linux-thread-multi/auto/IO/IO.so" (CRC mismatch).
warning: the debug information found in "/usr/lib/debug/usr/lib/perl5/5.12.3/x86_64-linux-thread-multi/auto/IO/IO.so.debug" does not match "/usr/lib/perl5/5.12.3/x86_64-linux-thread-multi/auto/IO/IO.so" (CRC mismatch).
warning: the debug information found in "/usr/lib/debug//usr/lib/perl5/vendor_perl/5.12.3/x86_64-linux-thread-multi/auto/XML/LibXML/LibXML.so.debug" does not match "/usr/lib/perl5/vendor_perl/5.12.3/x86_64-linux-thread-multi/auto/XML/LibXML/LibXML.so" (CRC mismatch).
warning: the debug information found in "/usr/lib/debug/usr/lib/perl5/vendor_perl/5.12.3/x86_64-linux-thread-multi/auto/XML/LibXML/LibXML.so.debug" does not match "/usr/lib/perl5/vendor_perl/5.12.3/x86_64-linux-thread-multi/auto/XML/LibXML/LibXML.so" (CRC mismatch).
*** glibc detected *** /usr/bin/perl: corrupted double-linked list: 0x0000000000b83440 ***
^C
Program received signal SIGINT,Interrupt.
0x00007ffff6abe12e in __lll_lock_wait_private () from /lib64/libc.so.6
Missing debug package(s),you should install: perl-debug-5.12.3-8.x86_64
(gdb) bt
#0 0x00007ffff6abe12e in __lll_lock_wait_private () from /lib64/libc.so.6
#1 0x00007ffff6a4f7a1 in _L_lock_9854 () from /lib64/libc.so.6
#2 0x00007ffff6a4d6eb in malloc () from /lib64/libc.so.6
#3 0x00007ffff6a43d6d in __libc_message () from /lib64/libc.so.6
#4 0x00007ffff6a49bfa in malloc_printerr () from /lib64/libc.so.6
#5 0x00007ffff6a49f38 in malloc_consolidate.part.3 () from /lib64/libc.so.6
#6 0x00007ffff6a4a749 in _int_free () from /lib64/libc.so.6
#7 0x00007ffff4e8b0e0 in xmlHashFree__internal_alias (table=0xb2db40,f=0x7ffff4e98e00 <xmlFreeAttribute>) at hash.c:324
#8 0x00007ffff4e82e42 in xmlFreeDtd__internal_alias (cur=0x633310)
at tree.c:1126
#9 0x00007ffff4e8259a in xmlFreeDoc__internal_alias (cur=0x635100)
at tree.c:1227
#10 0x00007ffff51e75a5 in PmmREFCNT_dec ()
from /usr/lib/perl5/vendor_perl/5.12.3/x86_64-linux-thread-multi/auto/XML/LibXML/LibXML.so
#11 0x00007ffff51c4f65 in XS_XML__LibXML__Node_DESTROY ()
from /usr/lib/perl5/vendor_perl/5.12.3/x86_64-linux-thread-multi/auto/XML/LibXML/LibXML.so
#12 0x00007ffff7b1d60d in Perl_pp_entersub ()
from /usr/lib/perl5/5.12.3/x86_64-linux-thread-multi/CORE/libperl.so
#13 0x00007ffff7ab9242 in Perl_call_sv ()
from /usr/lib/perl5/5.12.3/x86_64-linux-thread-multi/CORE/libperl.so
---Type <return> to continue,or q <return> to quit---
#14 0x00007ffff7b22cfa in Perl_sv_clear ()
from /usr/lib/perl5/5.12.3/x86_64-linux-thread-multi/CORE/libperl.so
#15 0x00007ffff7b23552 in Perl_sv_free2 ()
from /usr/lib/perl5/5.12.3/x86_64-linux-thread-multi/CORE/libperl.so
#16 0x00007ffff7b2314d in Perl_sv_clear ()
from /usr/lib/perl5/5.12.3/x86_64-linux-thread-multi/CORE/libperl.so
#17 0x00007ffff7b23552 in Perl_sv_free2 ()
from /usr/lib/perl5/5.12.3/x86_64-linux-thread-multi/CORE/libperl.so
#18 0x00007ffff51a6ad9 in XS_XML__LibXML__Reader__DESTROY ()
from /usr/lib/perl5/vendor_perl/5.12.3/x86_64-linux-thread-multi/auto/XML/LibXML/LibXML.so
#19 0x00007ffff7b1d60d in Perl_pp_entersub ()
from /usr/lib/perl5/5.12.3/x86_64-linux-thread-multi/CORE/libperl.so
#20 0x00007ffff7b14d70 in Perl_runops_standard ()
from /usr/lib/perl5/5.12.3/x86_64-linux-thread-multi/CORE/libperl.so
#21 0x00007ffff7ab9083 in Perl_call_sv ()
from /usr/lib/perl5/5.12.3/x86_64-linux-thread-multi/CORE/libperl.so
#22 0x00007ffff7b22cfa in Perl_sv_clear ()
from /usr/lib/perl5/5.12.3/x86_64-linux-thread-multi/CORE/libperl.so
#23 0x00007ffff7b23552 in Perl_sv_free2 ()
from /usr/lib/perl5/5.12.3/x86_64-linux-thread-multi/CORE/libperl.so
#24 0x00007ffff7b4a45f in Perl_leave_scope ()
from /usr/lib/perl5/5.12.3/x86_64-linux-thread-multi/CORE/libperl.so
---Type <return> to continue,or q <return> to quit---
#25 0x00007ffff7b15ad2 in Perl_pp_unstack ()
from /usr/lib/perl5/5.12.3/x86_64-linux-thread-multi/CORE/libperl.so
#26 0x00007ffff7b14d70 in Perl_runops_standard ()
from /usr/lib/perl5/5.12.3/x86_64-linux-thread-multi/CORE/libperl.so
#27 0x00007ffff7abed6e in perl_run ()
from /usr/lib/perl5/5.12.3/x86_64-linux-thread-multi/CORE/libperl.so
#28 0x0000000000400e29 in main ()
(gdb)
解决方法
您可以使用MALLOC_CHECK_环境变量来控制glibc内存检查的行为.如果将其设置为“3”,则会在任何检测到的错误上打印一条消息并中止().
有关信息,请参阅glibc的heap consistency checking文档 – 这实际上可能有助于您调试错误,因为启用MALLOC_CHECK_会比默认执行一般性检查(因此更快地捕获错误).
您可能还想查看Valgrind(如果您还没有)协助找出您的腐败问题.