[Bug modula2/112923] New: gm2 runs out of memory

[Bug modula2/112923] New: gm2 runs out of memory

[gaius at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112923

            Bug ID: 112923
           Summary: gm2 runs out of memory
           Product: gcc
           Version: 14.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: modula2
          Assignee: gaius at gcc dot gnu.org
          Reporter: gaius at gcc dot gnu.org
  Target Milestone: ---

Forwarded from the gm2 mailing list:

When building:
https://github.com/k-john-gough/gpmclr/tree/master/GPMCLR/source/gpmake

Gm2 runs out of memory with one particular module, namely TermSymbolsIO:

$ gm2 -c -fiso  -I../libgm2gpm -I. TermSymbolsIO.mod

cc1gm2: out of memory allocating 2097152 bytes after a total of
33873920 bytes

[Bug modula2/112923] gm2 runs out of memory

[gaius at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112923

Gaius Mulley <gaius at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|                            |2024-01-05
     Ever confirmed|0                           |1
             Status|UNCONFIRMED                 |ASSIGNED

--- Comment #1 from Gaius Mulley <gaius at gcc dot gnu.org> ---
Indeed - I'm writing a M2Diagnostic module to collect stats about memory and
time consumption - which hopefully will identify the modules consuming too much
resource.

In this particular case it occurs when building an array constant with
characters - I suspect too many temporary constants are being preserved from
the garbage collector.

[Bug modula2/112923] gm2 runs out of memory

[gaius at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112923

--- Comment #2 from Gaius Mulley <gaius at gcc dot gnu.org> ---
Created attachment 56992
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=56992&action=edit
Tiny example code showing the problem

The attached source will compile but consumes vast amounts of ram.

$ time gm2 -g -c  Blowup.mod

takes 43 secs on a amd64 3.6 GHz box and about 6GB ram.  The M2Diagnostic
module will generate resource data and will be called when -fmem-report or
-ftime-report is issued.