在gdb中保存核心文件

Question

是否可以使用gdb 保存/转储核心文件？有时我想保存文件以便以后分析。

Answer 1

在gdb中发出'generate-core-file'命令。

(gdb) help generate-core-file
Save a core file with the current state of the debugged process.
Argument is optional filename.  Default filename is 'core.<process_id>'.
(gdb) break main
Breakpoint 1 at 0x400e0b: file utils/udec.c, line 36.
(gdb) r
Starting program: /home/nos/build/utils/udec

Breakpoint 1, main (argc=1, argv=0x7fffffffe9a8) at utils/udec.c:36
36              int fileargc = 1;
(gdb) generate-core-file
Saved corefile core.7336

Answer 2

您还可以使用gcore <pid>生成核心。