1. 拿到这个程序的coredump文件。
我的在/var/log下:xxx_18.core,18是最新编号。
然后使用gdb:
- $ gdb ngw ngw.18.core
- GNU gdb (Ubuntu 8.1.1-0ubuntu1) 8.1.1
- Copyright (C) 2018 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-linux-gnu".
- Type "show configuration" for configuration details.
- For bug reporting instructions, please see:
- <http://www.gnu.org/software/gdb/bugs/>.
- Find the GDB manual and other documentation resources online at:
- <http://www.gnu.org/software/gdb/documentation/>.
- For help, type "help".
- Type "apropos word" to search for commands related to "word"...
- Reading symbols from ngw...done.
- warning: exec file is newer than core file.
- [New LWP 1]
- [New LWP 2]
- warning: Unexpected size of section `.reg/1' in core file.
- warning: Unexpected size of section `.reg2/1' in core file.
- Program terminated with signal SIGSEGV, Segmentation fault.
- warning: Unexpected size of section `.reg/1' in core file.
- warning: Unexpected size of section `.reg2/1' in core file.
- #0 0x100bed98 in ?? ()
- [Current thread is 1 (LWP 1)]
- (gdb) p main
- $1 = {int (void)} 0xbe30 <main()>
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