[Devel] Re: FreeType 1.4.CVS caused libgd-perl to segfault on Alpha?

[Anthony Fok]

Re: [Debian Bug report] Bug#112667: libgd-perl: build failure on alpha

Hello Ivo,

Well, I have no idea, as I am not good at debugging segmentation faults. 
:-)  Anyhow, I have grabbed the latest FreeType 1 development tarball
and packaged it as freetype1_1.4pre.20011029-1, which is already in the
Debian archive.  Please test it and see if the segfault is there.

I have Cc'ed this message to the FreeType development mailing list.
Perhaps the experts here could help diagnose the problem too.  :-)

Cheers,

Anthony

On Sun, Nov 18, 2001 at 03:27:16PM +0100, Ivo Timmermans wrote:
> Paul Slootman wrote:
> > Package: libgd-perl
> > Version: 1.33-2
> > Severity: serious
> > 
> > The build (on alpha) fails during the tests.
> > It looks like a segmentation violation (wstatus 11), see build log below.
> > If you need access to my alpha box to debug this, contact me privately.
> 
> Ok, I traced the segfault back to libttf, hence I'm Cc'ing its
> maintainer.
> 
> Anthony, do you think this is a problem in libttf, or is libgd using
> it incorrectly?  AFAICS, this only happens on alpha.
> 
> 
> Program received signal SIGSEGV, Segmentation fault.
> Draw_Sweep (raster=0x12004de50) at ttraster.c:2260
> 2260              x2 = P_Right->X;
> (gdb) bt
> #0  Draw_Sweep (raster=0x12004de50) at ttraster.c:2260
> #1  0x12001d7f0 in Render_Single_Pass (raster=0x12004de50, flipped=1) at 
> ttraster.c:2440
> #2  0x12001dd04 in Render_Gray_Glyph (raster=0x12004de50, glyph=0x11ffff400, 
> target_map=0x5e00, 
>     palette=0x395c <Address 0x395c out of bounds>) at ttraster.c:2631
> #3  0x12000cfdc in TT_Get_Outline_Pixmap (engine={z = 0x395c}, outline=0xd, 
> pixmap=0x5e00)
>     at ttapi.c:1603
> #4  0x12000ccf0 in TT_Get_Glyph_Pixmap (glyph={z = 0x1}, pixmap=0x1200630d8, 
> xOffset=64, 
>     yOffset=64) at ttapi.c:1434
> #5  0x120008a18 in bitmapFetch (error=0x120063a80, key=0x11ffff540) at 
> ../gdttf.c:575
> #6  0x12000a000 in gdCacheGet (head=0x120063a70, keydata=0x11ffff540) at 
> ../gdcache.c:116
> #7  0x120009350 in gdttfchar (im=0x1200352d0, fg=0, font=0x12005ea60, x=20, 
> y=20, x1=0, y1=0, 
>     advance=0x11ffff610, bbox=0x11ffff628, next=0x11ffff678) at ../gdttf.c:735
> #8  0x1200099a0 in gdImageStringTTF (im=0x1200352d0, brect=0x120035298, fg=0, 
>     fontname=0x12001ee18 "./Generic.ttf", ptsize=12, angle=0, x=20, y=20, 
> string=0x12001ee26 "H")
>     at ../gdttf.c:851
> #9  0x120001120 in foo ()
> #10 0x1200011c0 in main ()
> #11 0x2000010b00c in __libc_start_main () from /lib/libc.so.6.1
> 
> 
> test.c:
> 
> #include <gd.h>
> 
> gdImagePtr img;
> int brect[8];
> char *err;
> 
> 
> int foo()
> {
>         err = 
> gdImageStringTTF(img,brect,gdImageColorAllocate(img,0,0,0),"./Generic.ttf",12.0,0.0,20,20,"H");
> 
>         if(err)
>         {
>                 fprintf(stderr, "Error: %s\n", err);
>         }
> }
> 
> int main()
> {
>         img = gdImageCreate(450,200);
>         foo();
>         return 0;
> }
> 
> 
> 
>       Ivo
> 
> -- 
> Seit Käptn Ahab sich mit Moses zusammengetan hatte, hatte Moby Dick
> nicht mehr viel zu lachen.

-- 
Anthony Fok Tung-Ling  ÀNªFÆF
ThizLinux Laboratory   <address@hidden> http://www.thizlinux.com/
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