GDB
eu-unstrip
一般release給客戶的檔案都是移掉debug資訊的檔案，不過，在編譯release檔案時，通常會額外編譯一份具有debug symbol的檔案，而在debug時，雖然可以在gdb動態載入debug symbol，不過，還是不方便，其實elfutils提供一個好用的工具eu-unstrip，它可以把debug symbol塞回原本elf檔案，這就是這次要說明的東西。
main.c
#include <stdio.h>
int main(int argc, char** argv)
{
printf("testing\n");
return 0;
}
編譯
$ gcc main.c -o main $ gcc main.c -ggdb -o main.debug
模擬release build
$ strip main
$ file main
main: ELF 64-bit LSB pie executable, x86-64, version 1 (SYSV), dynamically linked, BuildID[sha1]=44edbb6ef58938fde04de6b6943a640edeb37b77, stripped
unstrip
$ eu-unstrip main main.debug
$ mv main.debug main
$ file main
main: ELF 64-bit LSB pie executable, x86-64, version 1 (SYSV), dynamically linked, BuildID[sha1]=44edbb6ef58938fde04de6b6943a640edeb37b77, with debug_info, not stripped
debug
$ gdb main
GNU gdb (Debian 8.2.1-2+b3) 8.2.1
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Reading symbols from main...done.
(gdb) b main
Breakpoint 1 at 0x1114: file main.c, line 5.
(gdb) r
Starting program: /home/steward/Downloads/main
Program received signal SIGSEGV, Segmentation fault.
0x0000000000000001 in ?? ()
(gdb) list
1 #include <stdio.h>
2
3 int main(int argc, char** argv)
4 {
5 printf("testing\n");
6 return 0;
7 }