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Re: [Nmh-workers] GCC 8 pre-releases have escaped...
From: |
Bakul Shah |
Subject: |
Re: [Nmh-workers] GCC 8 pre-releases have escaped... |
Date: |
Sat, 10 Feb 2018 20:36:55 -0800 |
On Sat, 10 Feb 2018 17:05:37 +0000 Ralph Corderoy <address@hidden> wrote:
Ralph Corderoy writes:
>
> I built nmh git here with gc 7.6.0-1 by `cheating' with Makefile.
>
> AM_CFLAGS = -Dmalloc=GC_malloc -Dfree=GC_free -Drealloc=GC_realloc
> AM_LDFLAGS = -lgc
>
> It works! Well, simpler programs work. scan(1) SEGVs, ditto folder(1).
I did the same here (on FreeBSD amd64) and it too crashed.
Looking a bit deeper, I see that in mf.c:258 strdup() is
called and strdup() uses system malloc(), not GC_malloc().
So I added malloc/realloc/free in sbr/util.c, which call their
corresponding GC_ versions and verified that strdup() does
indeed call GC_malloc(). Now scan goes further but then fails
at sbr/mts.c:342 where getpwuid() is called -- which in turn
calls nsdispatch() and eventually some internal routine calls
GC_free and dies. To debug this I'd have to recompile libgc
with different flags usuch as REDIRECT_MALLOC and link to
libgc before libc. May be in future.
But this is GC, right? We don't need no stinking free()! So I
redefined it to be
void free(void*) {}
And the programs I tried worked fine. Running best scan time
for 200K messages, scan+gc takes 13.5 seconds while the
regular scan 7.4 seconds. Looking top, the GC version takes
27MB while the nonGC version 22MB.
- Re: [Nmh-workers] GCC 8 pre-releases have escaped..., (continued)
- Re: [Nmh-workers] GCC 8 pre-releases have escaped..., Ralph Corderoy, 2018/02/07
- Re: [Nmh-workers] GCC 8 pre-releases have escaped..., Ken Hornstein, 2018/02/10
- Re: [Nmh-workers] GCC 8 pre-releases have escaped..., Paul Vixie, 2018/02/10
- Re: [Nmh-workers] GCC 8 pre-releases have escaped..., Paul Vixie, 2018/02/10
- Re: [Nmh-workers] GCC 8 pre-releases have escaped..., Ralph Corderoy, 2018/02/10
- Re: [Nmh-workers] GCC 8 pre-releases have escaped..., Bakul Shah, 2018/02/07
- Re: [Nmh-workers] GCC 8 pre-releases have escaped..., Ralph Corderoy, 2018/02/10
- Re: [Nmh-workers] GCC 8 pre-releases have escaped..., Paul Vixie, 2018/02/10
- Re: [Nmh-workers] GCC 8 pre-releases have escaped..., Bakul Shah, 2018/02/10
- Re: [Nmh-workers] GCC 8 pre-releases have escaped..., Ralph Corderoy, 2018/02/11
- Re: [Nmh-workers] GCC 8 pre-releases have escaped...,
Bakul Shah <=
- Re: [Nmh-workers] GCC 8 pre-releases have escaped..., Ralph Corderoy, 2018/02/11
- Re: [Nmh-workers] GCC 8 pre-releases have escaped..., Michael Richardson, 2018/02/06
- Re: [Nmh-workers] GCC 8 pre-releases have escaped..., Ralph Corderoy, 2018/02/07