Re: [PATCH]: Increase MAX_ARTIFICIAL_LABEL_BYTES to 40

[Richard Biener]

On August 23, 2017 5:49:56 PM GMT+02:00, Uros Bizjak <ubiz...@gmail.com> wrote:
>Hello!
>
>Recent changes caused bootstrap on alpha with:
>
>/space/homedirs/uros/gcc-svn/trunk/gcc/dwarf2out.c: In function ‘void
>init_sections_and_labels(bool)’:
>/space/homedirs/uros/gcc-svn/trunk/gcc/dwarf2out.c:27181:1: error:
>‘%ld’ directive writing between 1 and 10 bytes into a region of size 8
>[-Werror=format-overflow=]
> init_sections_and_labels (bool early_lto_debug)
> ^~~~~~~~~~~~~~~~~~~~~~~~
>/space/homedirs/uros/gcc-svn/trunk/gcc/dwarf2out.c:27181:1: note:
>directive argument in the range [0, 4294967295]
>In file included from ./tm.h:25:0,
>               from /space/homedirs/uros/gcc-svn/trunk/gcc/target.h:52,
>            from /space/homedirs/uros/gcc-svn/trunk/gcc/dwarf2out.c:61:
>/space/homedirs/uros/gcc-svn/trunk/gcc/config/alpha/alpha.h:958:11:
>note: ‘sprintf’ output between 24 and 33 bytes into a destination of
>size 30
>   sprintf ((LABEL), "*$%s%ld", (PREFIX), (long)(NUM))
>   ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>/space/homedirs/uros/gcc-svn/trunk/gcc/dwarf2out.c:27207:4: note: in
>expansion of macro ‘ASM_GENERATE_INTERNAL_LABEL’
>    ASM_GENERATE_INTERNAL_LABEL (debug_skeleton_line_section_label,
>    ^~~~~~~~~~~~~~~~~~~~~~~~~~~
>/space/homedirs/uros/gcc-svn/trunk/gcc/dwarf2out.c:27181:1: error:
>‘%ld’ directive writing between 1 and 10 bytes into a region of size 6
>[-Werror=format-overflow=]
> init_sections_and_labels (bool early_lto_debug)
> ^~~~~~~~~~~~~~~~~~~~~~~~
>/space/homedirs/uros/gcc-svn/trunk/gcc/dwarf2out.c:27181:1: note:
>directive argument in the range [0, 4294967295]
>In file included from ./tm.h:25:0,
>               from /space/homedirs/uros/gcc-svn/trunk/gcc/target.h:52,
>            from /space/homedirs/uros/gcc-svn/trunk/gcc/dwarf2out.c:61:
>/space/homedirs/uros/gcc-svn/trunk/gcc/config/alpha/alpha.h:958:11:
>note: ‘sprintf’ output between 26 and 35 bytes into a destination of
>size 30
>   sprintf ((LABEL), "*$%s%ld", (PREFIX), (long)(NUM))
>   ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>/space/homedirs/uros/gcc-svn/trunk/gcc/dwarf2out.c:27226:4: note: in
>expansion of macro ‘ASM_GENERATE_INTERNAL_LABEL’
>    ASM_GENERATE_INTERNAL_LABEL (debug_skeleton_abbrev_section_label,
>    ^~~~~~~~~~~~~~~~~~~~~~~~~~~
>
>These new debug_skeleton_* section names are quite long, and together
>with numerical value they don't fit anymore into the array with
>MAX_ARTIFICIAL_LABEL_BYTES size.
>
>The solution is to increase MAX_ARTIFICIAL_LABEL_BYTES value from 30 to
>40.
>
>The patch also removes unneeded definition from dwarf2cfi.c
>
>2017-08-23  Uros Bizjak  <ubiz...@gmail.com>
>
>    * dwarf2out.c (MAX_ARTIFICIAL_LABEL_BYTES): Increase to 40.
>    * dwarf2cfi.c (MAX_ARTIFICIAL_LABEL_BYTES): Remove.
>
>Patch restores bootstrap on alphaev68-linux-gnu.
>
>OK for mainline?

OK. 

Richard. 


>Uros.