On Sun, Feb 21, 2016 at 12:05 PM, Bernd Edlinger
<bernd.edlinger@xxxxxxxxxx> wrote:
> Hi,
>
> Maybe something like that works for you?
>
>
> cat test.cc
> #define _str(x) #x
> #define str(x) _str(x)
> #define PLACE_HERE(section,data) \
> asm(".pushsection " str(section) "\n\t" \
> ".quad 999f \n\t" \
> ".long " str(__LINE__) "\n\t" \
> ".long " str(data) "\n\t" \
> ".section .rodata\n\t" \
> "999: .string \"" __FILE__ "\"\n\t" \
> ".popsection")
>
> const int* get_data()
> {
> PLACE_HERE(.custom,123);
> static const int data = 123;
>
> return & data;
> }
>
> inline const int* inline_get_data()
> {
> PLACE_HERE(.custom,123);
> static const int inline_data = 123;
>
> return & inline_data;
> }
>
> int main()
> {
> (void) get_data();
> (void) inline_get_data();
> return 0;
> }
>
>
> Regards
> Bernd.
Hi Bernd,
This is very similar to the solution I currently have working fine.
I'd like to replace it, because:
- I couldn't find a way to store __func__, which is a local char
array, unlike to __FILE__ and __LINE__.
- constexpr functions cannot be used to transform __FILE__,
__PRETTY_FUNCTION__ and others.
- If you need arguments for the asm block (Extended ASM), e.g: to
return the address of the stored value to avoid duplication, then
curly braces cannot be used, because of the asm dialect feature in
extended ASM blocks.
- It is even less portable than the version in the original post.
Thanks,
Benedek
