[RFC] LONGEST and ULONGEST function template instantiation

[Pedro Alves]

On 06/15/2017 12:59 PM, Yao Qi wrote:
> Pedro Alves <palves@redhat.com> writes:
> 
> Hi Pedro,
> I pick up your patch, and update the ChangeLog entry.

Thanks.  FAOD, fine with me to push it in.

>> The version below has no impact on code size:
>>
>> $ size gdb.before gdb.after
>>    text    data     bss     dec     hex filename
>> 7535236  125008  181184 7841428  77a694 gdb.before
>> 7535236  125008  181184 7841428  77a694 gdb.after
> 
> I can't reproduce your result with gcc 5.4.0 on Ubuntu 16.04.  The
> patched GDB size increased by 112, but it doesn't matter.
> 
> before:
> $ size ./gdb
>    text	   data	    bss	    dec	    hex	filename
> 7733505	 144208	 180768	8058481	 7af671	./gdb
> 
> after:
> $ size ./gdb
>    text    data     bss     dec     hex filename
> 7733617  144208  180768 8058593  7af6e1 ./gdb

Curious, I see the same too now.  Dunno what I did
before.

Diffing "size -A" (and stripping addr column) shows:

-gdb.before.stripped  :
+gdb.after.stripped  :
 .rela.plt              16344
 .init                     26
 .plt                   10912
-.text                4239945
+.text                4239705
 .fini                      9
-.rodata              2280312
+.rodata              2280728
 .stapsdt.base              1
-.eh_frame_hdr         126004
-.eh_frame             745124
+.eh_frame_hdr         125996
+.eh_frame             745084


So it results in less code after all.  The increase is
in .rodata.  Maybe the result of longer mangled names or
longer strings for __FUNCTION__.

Thanks,
Pedro Alves