c++ - 调试c++ : . ./nptl/sysdeps/unix/sysv/linux/raise.c:没有这样的文件或目录

Question

我正在使用 gdb 来调试 C++ 程序。在行中

assert(prevId ==  GetTagIdFromState(maxState));

• 参数prevId值为0；
• 方法GetTagIdFromState(maxState) returns 50;

调试时出现以下错误。

Assertion `prevId == GetTagIdFromState(maxState)' failed.
Program received signal SIGABRT, Aborted.
0x00007ffff6ecbba5 in raise (sig=<value optimized out>) at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
64    ../nptl/sysdeps/unix/sysv/linux/raise.c: No such file or directory.
      in ../nptl/sysdeps/unix/sysv/linux/raise.c

Answer 1

您的应用程序按预期工作。断言失败(因为您传递给它的值不相等，assert 宏接收 0)，因此您的程序被中止。这就是断言的工作原理:

If NDEBUG is not defined, then assert checks if its argument (which must have scalar type) compares equal to zero. If it does, assert outputs implementation-specific diagnostic information on the standard error output and calls std::abort.

强调我的。

检查 this assert reference了解更多信息。