Re: [PATCH v2 1/6] net-PPP: Replacement of a printk() call by pr_warn() in mppe_rekey()

Julia Lawall
2014-12-07T10:44:42Z

> A negative to that approach is inlined functions would
> take the function name of the parent not keep the
> inlined function name.

I tried the following:

#include <stdio.h>

inline int foo() {
printf("%s %x\n",__func__,0x12345);
}

int main () {
foo();
}

The assembly code generated for main is:

0000000000400470 :
400470: b9 45 23 01 00 mov $0x12345,%ecx
400475: ba 4b 06 40 00 mov $0x40064b,%edx
40047a: be 44 06 40 00 mov $0x400644,%esi
40047f: bf 01 00 00 00 mov $0x1,%edi
400484: 31 c0 xor %eax,%eax
400486: e9 d5 ff ff ff jmpq 400460 <__printf_chk@plt>

That is, the call to foo seems tom be inlined.

But the output is:

foo 12345

So it seems that __func__ is determined before inlining.

julia