How does the assert() work?

[lynx1987]

Hi , I got a problem about assert() on linux/unix && gcc , I wanna know how does assert() work,I mean that how does the assert() make the programme exit? Is assert() send SIGSEGV to programme or called function exit() or other ways? Thank you

[GNU-Fan]

Public Git Hosting - glibc.git/tree - assert/

[Cabhan]

The best way to answer this question would be to look at the assert man page. Man pages are a set of documentation built into Linux systems. Run this command from the commandline:

man 3 assert

It will explain how assert() works. A short summary is that if the expression is false, an error message is printed and abort() is called. To see what abort is, we check its man page:

man 3 abort

We see here that abort() sends the process a SIGABRT.

[lynx1987]

The best way to answer this question would be to look at the assert man page. Man pages are a set of documentation built into Linux systems. Run this command from the commandline:

man 3 assert

It will explain how assert() works. A short summary is that if the expression is false, an error message is printed and abort() is called. To see what abort is, we check its man page:

man 3 abort

We see here that abort() sends the process a SIGABRT.

Thank you!

[bbchina]

Hi , I got a problem about assert() on linux/unix && gcc , I wanna know how does assert() work,I mean that how does the assert() make the programme exit? Is assert() send SIGSEGV to programme or called function exit() or other ways? Thank you

12 assert(!p1);
(gdb)
a.out: main.c:12: main: Assertion `!p1' failed.

Program received signal SIGABRT, Aborted.
0xb7761424 in __kernel_vsyscall ()