linux - Linux 中多线程应用程序中的 Coredump

Question

我正在开发多线程应用程序。当进程转储时，它会显示如下。我无法分析核心。我想知道与库链接时是否有问题？请建议如何获取有关我的核心转储的更多信息。

库:

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GNU gdb Red Hat Linux (6.5-25.el5rh)
Copyright (C) 2006 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "x86_64-redhat-linux-gnu"...(no debugging symbols found)
Using host libthread_db library "/lib64/libthread_db.so.1".

Reading symbols from /lib64/libdl.so.2...(no debugging symbols found)...done.
Loaded symbols for /lib64/libdl.so.2
Reading symbols from /usr/lib64/libz.so.1...(no debugging symbols found)...done.
Loaded symbols for /usr/lib64/libz.so.1
Reading symbols from /lib64/libpam.so.0...(no debugging symbols found)...done.
Loaded symbols for /lib64/libpam.so.0
Reading symbols from /lib64/libssl.so.6...
(no debugging symbols found)...done.
Loaded symbols for /lib64/libssl.so.6
Reading symbols from /lib64/libpthread.so.0...(no debugging symbols found)...done.
Loaded symbols for /lib64/libpthread.so.0
Reading symbols from /lib64/libresolv.so.2...(no debugging symbols found)...done.
Loaded symbols for /lib64/libresolv.so.2
Reading symbols from /lib64/libnsl.so.1...
(no debugging symbols found)...done.
Loaded symbols for /lib64/libnsl.so.1
Reading symbols from /lib64/libm.so.6...(no debugging symbols found)...done.
Loaded symbols for /lib64/libm.so.6
Reading symbols from /lib64/libcrypto.so.6...(no debugging symbols found)...done.
Loaded symbols for /lib64/libcrypto.so.6
Reading symbols from /usr/lib64/libxml2.so.2...
(no debugging symbols found)...done.
Loaded symbols for /usr/lib64/libxml2.so.2
Reading symbols from /usr/lib64/libstdc++.so.6...(no debugging symbols found)...done.
Loaded symbols for /usr/lib64/libstdc++.so.6
Reading symbols from /lib64/libgcc_s.so.1...(no debugging symbols found)...done.
Loaded symbols for /lib64/libgcc_s.so.1
Reading symbols from /lib64/libc.so.6...
(no debugging symbols found)...done.
Loaded symbols for /lib64/libc.so.6
Reading symbols from /lib64/ld-linux-x86-64.so.2...(no debugging symbols found)...done.
Loaded symbols for /lib64/ld-linux-x86-64.so.2
Reading symbols from /lib64/libaudit.so.0...(no debugging symbols found)...done.
Loaded symbols for /lib64/libaudit.so.0
Reading symbols from /usr/lib64/libgssapi_krb5.so.2...
(no debugging symbols found)...done.
Loaded symbols for /usr/lib64/libgssapi_krb5.so.2
Reading symbols from /usr/lib64/libkrb5.so.3...(no debugging symbols found)...done.
Loaded symbols for /usr/lib64/libkrb5.so.3
Reading symbols from /lib64/libcom_err.so.2...(no debugging symbols found)...done.
Loaded symbols for /lib64/libcom_err.so.2
Reading symbols from /usr/lib64/libk5crypto.so.3...
(no debugging symbols found)...done.
Loaded symbols for /usr/lib64/libk5crypto.so.3
Reading symbols from /usr/lib64/libkrb5support.so.0...(no debugging symbols found)...done.
Loaded symbols for /usr/lib64/libkrb5support.so.0
Reading symbols from /lib64/libkeyutils.so.1...(no debugging symbols found)...done.
Loaded symbols for /lib64/libkeyutils.so.1
Reading symbols from /lib64/libselinux.so.1...
(no debugging symbols found)...done.
Loaded symbols for /lib64/libselinux.so.1
Reading symbols from /lib64/libsepol.so.1...(no debugging symbols found)...done.
Loaded symbols for /lib64/libsepol.so.1
Reading symbols from /lib64/libnss_files.so.2...(no debugging symbols found)...done.
Loaded symbols for /lib64/libnss_files.so.2
Reading symbols from /lib64/libnss_dns.so.2...
(no debugging symbols found)...done.
Loaded symbols for /lib64/libnss_dns.so.2

回溯

Core was generated by `requestprocess'                                                                  '.
Program terminated with signal 11, Segmentation fault.
#0  0x000000000042be71 in std::string::operator= ()
(gdb) where
#0  0x000000000042be71 in std::string::operator= ()
#1  0x000000000042c559 in std::string::operator= ()
#2  0x000000000044e6df in std::ostream::operator<< ()
#3  0x000000000046f64f in std::string::substr ()
#4  0x000000000043065e in std::string::operator= ()
#5  0x0000003d2d2062e7 in start_thread () from /lib64/libpthread.so.0
#6  0x0000003d2c6ce3bd in clone () from /lib64/libc.so.6
(gdb) 

Answer 1

信息线程

并且尽量不要使用 gdb 分析 coredump，而是在 gdb 下启动您的应用程序:

gdb --args your_application with_arguments

然后

run