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                合規國際互聯網加速 OSASE為企業客戶提供高速穩定SD-WAN國際加速解決方案。 廣告
                # 為exec調用設置catchpoint ## 例子 #include <unistd.h> int main(void) { execl("/bin/ls", "ls", NULL); return 0; } ## 技巧 使用gdb調試程序時,可以用“`catch exec`”命令為`exec`系列系統調用設置`catchpoint`,以上面程序為例: (gdb) catch exec Catchpoint 1 (exec) (gdb) r Starting program: /home/nan/a process 32927 is executing new program: /bin/ls Catchpoint 1 (exec'd /bin/ls), 0x00000034e3a00b00 in _start () from /lib64/ld-linux-x86-64.so.2 (gdb) bt #0 0x00000034e3a00b00 in _start () from /lib64/ld-linux-x86-64.so.2 #1 0x0000000000000001 in ?? () #2 0x00007fffffffe73d in ?? () #3 0x0000000000000000 in ?? () 可以看到當`execl`調用發生后,gdb會暫停程序的運行。 注意:目前只有HP-UX和GNU/Linux支持這個功能。 參見[gdb手冊](https://sourceware.org/gdb/onlinedocs/gdb/Set-Catchpoints.html). ## 貢獻者 nanxiao
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