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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
                # 讓catchpoint只觸發一次 ## 例子 #include <stdio.h> #include <stdlib.h> #include <sys/types.h> #include <unistd.h> int main(void) { pid_t pid; int i = 0; for (i = 0; i < 2; i++) { pid = fork(); if (pid < 0) { exit(1); } else if (pid == 0) { exit(0); } } printf("hello world\n"); return 0; } ## 技巧 使用gdb調試程序時,可以用“`tcatch`”命令設置`catchpoint`只觸發一次,以上面程序為例: (gdb) tcatch fork Catchpoint 1 (fork) (gdb) r Starting program: /home/nan/a Temporary catchpoint 1 (forked process 27377), 0x00000034e42acdbd in fork () from /lib64/libc.so.6 (gdb) c Continuing. hello world [Inferior 1 (process 27373) exited normally] (gdb) q 可以看到當程序只在第一次調用`fork`時暫停。 參見[gdb手冊](https://sourceware.org/gdb/onlinedocs/gdb/Set-Catchpoints.html). ## 貢獻者 nanxiao
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