Core file analysis under Linux platform

Reprinted from Csdn Blog: http://blog.csdn.net/gobitan/article/details/5644151

First step: Find the core file which program produced it.

[[email protected] dennis]# file core.11751

Core.11751:elf 64-bit LSB Core file AMD x86-64, version 1 (SYSV), Svr4-style, from ' Java '

[Email protected] dennis]#

As can be seen from the above, the core file is generated by Java.

Step Two: Use GDB The debugger finds the problem and executes the following command

[Email protected] dennis]# gdb Java core.11751

GNU gdb Fedora (6.8-27.EL5)

Copyright (C) Free Software Foundation, Inc.

License gplv3+: GNU GPL version 3 or later

This was free software:you was 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 is configured as "X86_64-redhat-linux-gnu" ...

(No debugging symbols found)

Reading symbols from/lib64/libpthread.so.0 ... (No debugging symbols found) ... done.

Loaded symbols for/lib64/libpthread.so.0

Reading symbols from/usr/java/jre1.6.0_19/lib/amd64/jli/libjli.so ... (No debugging symbols found) ... done.

Loaded symbols for/usr/java/jre1.6.0_19/bin/. /lib/amd64/jli/libjli.so

Reading symbols from/lib64/libdl.so.2 ... (No debugging symbols found) ... done.

Loaded symbols for/lib64/libdl.so.2

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/usr/java/jre1.6.0_19/lib/amd64/server/libjvm.so ... (No debugging symbols found) ... done.

Loaded symbols for/usr/java/jre1.6.0_19/lib/amd64/server/libjvm.so

Reading symbols from/lib64/libm.so.6 ... (No debugging symbols found) ... done.

Loaded symbols for/lib64/libm.so.6

Reading symbols from/lib64/librt.so.1 ... (No debugging symbols found) ... done.

Loaded symbols For/lib64/librt.so.1

Reading symbols from/usr/java/jre1.6.0_19/lib/amd64/libverify.so ...

(No debugging symbols found) ... done.

Loaded symbols for/usr/java/jre1.6.0_19/lib/amd64/libverify.so

Reading symbols from/usr/java/jre1.6.0_19/lib/amd64/libjava.so ... (No debugging symbols found) ... done.

Loaded symbols for/usr/java/jre1.6.0_19/lib/amd64/libjava.so

Reading symbols from/lib64/libnsl.so.1 ... (No debugging symbols found) ... done.

Loaded symbols For/lib64/libnsl.so.1

Reading symbols from/usr/java/jre1.6.0_19/lib/amd64/native_threads/libhpi.so ... (No debugging symbols found) ... done.

Loaded symbols for/usr/java/jre1.6.0_19/lib/amd64/native_threads/libhpi.so

Reading symbols from/lib64/libnss_files.so.2 ...

(No debugging symbols found) ... done.

Loaded symbols for/lib64/libnss_files.so.2

Reading symbols from/usr/java/jre1.6.0_19/lib/amd64/libzip.so ... (No debugging symbols found) ... done.

Loaded symbols for/usr/java/jre1.6.0_19/lib/amd64/libzip.so

Reading symbols from/usr/java/jre1.6.0_19/lib/amd64/libnet.so ... (No debugging symbols found) ... done.

Loaded symbols for/usr/java/jre1.6.0_19/lib/amd64/libnet.so

Reading symbols from/usr/java/jre1.6.0_19/lib/amd64/librmi.so ... (No debugging symbols found) ... done.

Loaded symbols for/usr/java/jre1.6.0_19/lib/amd64/librmi.so

Reading symbols from/usr/java/jre1.6.0_19/lib/amd64/libnio.so ...

(No debugging symbols found) ... done.

Loaded symbols for/usr/java/jre1.6.0_19/lib/amd64/libnio.so

Reading symbols from/opt/nawg/lib/libheadercodecjni.so ... (No debugging symbols found) ... done.

Loaded symbols for/opt/nawg/lib/libheadercodecjni.so

Reading symbols From/opt/nawg/lib/libwpss_wsl.so.1...done.

Loaded symbols For/opt/nawg/lib/libwpss_wsl.so.1

Reading symbols From/opt/nawg/lib/libwpss_hc.so.2...done.

Loaded symbols for/opt/nawg/lib/libwpss_hc.so.2

Reading symbols From/opt/nawg/lib/libwss_wenc.so...done.

Loaded symbols for/opt/nawg/lib/libwss_wenc.so

Reading symbols From/usr/java/jre1.6.0_19/lib/amd64/libawt.so...done.

Loaded symbols for/usr/java/jre1.6.0_19/lib/amd64/libawt.so

Reading symbols From/usr/java/jre1.6.0_19/lib/amd64/headless/libmawt.so...done.

Loaded symbols for/usr/java/jre1.6.0_19/lib/amd64/headless/libmawt.so

Reading symbols From/opt/nawg/lib/libwiawmlsencoder.so...done.

Loaded symbols for/opt/nawg/lib/libwiawmlsencoder.so

Reading symbols From/opt/nawg/lib/libwiahtml2xhtml.so...done.

Loaded symbols for/opt/nawg/lib/libwiahtml2xhtml.so

Reading symbols From/opt/nawg/lib/libcapcodecjni.so...done.

Loaded symbols for/opt/nawg/lib/libcapcodecjni.so

Reading symbols From/opt/nawg/lib/libwpss.so.4...done.

Loaded symbols for/opt/nawg/lib/libwpss.so.4

Reading symbols From/opt/nawg/lib/libserverjni.so...done.

Loaded symbols for/opt/nawg/lib/libserverjni.so

Reading symbols From/opt/nawg/lib/libwpss_crypto.so.1...done.

Loaded symbols For/opt/nawg/lib/libwpss_crypto.so.1

Reading symbols From/opt/nawg/lib/libcrypto.so.0.9.8...done.

Loaded symbols for/opt/nawg/lib/libcrypto.so.0.9.8

Reading symbols From/usr/lib/oracle/10.2.0.2/client/lib/libocijdbc10.so...done.

Loaded symbols for/usr/lib/oracle/10.2.0.2/client/lib/libocijdbc10.so

Reading symbols From/usr/lib/oracle/10.2.0.2/client/lib/libclntsh.so.10.1...done.

Loaded symbols for/usr/lib/oracle/10.2.0.2/client/lib/libclntsh.so.10.1

Reading symbols From/usr/lib/oracle/10.2.0.2/client/lib/libnnz10.so...done.

Loaded symbols for/usr/lib/oracle/10.2.0.2/client/lib/libnnz10.so

Reading symbols From/usr/lib/oracle/10.2.0.2/client/lib/libociicus.so...done.

Loaded symbols for/usr/lib/oracle/10.2.0.2/client/lib/libociicus.so

Core is generated by ' java-server-dwaphome=/opt/nawg/log/wps_var-dsystemroot=/opt/nawg-dsystembin '.

Program terminated with signal 6, aborted.

[New Process 12593]

[New Process 22363]

"Omitted in the middle."

[New Process 11752]

[New Process 11751]

#0 0x00002b08894f4215 in Raise () from/lib64/libc.so.6

then execute the BT Command

(GDB) BT

#0 0x00002b08894f4215 in Raise () from/lib64/libc.so.6

#1 0x00002b08894f5cc0 in Abort () from/lib64/libc.so.6

#2 0x00002b0889df13d7 in Os::abort () from/usr/java/jre1.6.0_19/lib/amd64/server/libjvm.so

#3 0x00002b0889f2a50d in Vmerror::report_and_die () from/usr/java/jre1.6.0_19/lib/amd64/server/libjvm.so

#4 0x00002b0889df74c1 in jvm_handle_linux_signal () from/usr/java/jre1.6.0_19/lib/amd64/server/libjvm.so

#5 0x00002b0889df3cfe in Signalhandler () from/usr/java/jre1.6.0_19/lib/amd64/server/libjvm.so

#6 <signal Handler Called>

#7 0X00002AAAEC5DD0BD in Declex (Yylval=<value optimized out>, decparam=0x572dd840) at lex_dec.c:7997

#8 0x00002aaaec5e15c5 in Decparse (decparam=0x572dd840) at yacc_dec.c:1008

#9 0x00002aaaec5d4ff1 in Hc_decodeheader (context=0x564b62f0, Wspheader=<value optimized out>, WspHeaderLength= 4096,

Contentlength=0, httpheader=0x5636a390 "b$¨éb$:/r/n", httpheaderlength=0x43caa814) at hc_decoder.c:2517

#10 0x00002aaaec3b2dbe in Java_com_nokia_wap_filter_headercodec_headercodec_cdecode ()

From/opt/nawg/lib/libheadercodecjni.so

#11 0x00002aaaab866058 in?? ()

#12 0x0000000043caa8b0 in?? ()

#13 0x0000000000000000 in?? ()

(GDB)

From the stack information obtained by the BT command above, you can see clearly the number of lines of the source code where the problem resides, namely:

hc_decoder.c:2517

This makes it easy to analyze and locate problems.

Reference documents:

(1) http://www.dialogic.com/support/helpweb/dxall/tn957.aspx

(2) Http://www.sun.com/bigadmin/jsp/descFile.jsp?url=descAll/sun_gdd__all__pkg_a

Core file analysis under Linux platform