Re: [ft-devel] More crashes on ARM

[David Turner]

Ahh,

your version of FontConfig is accessing internal fields of FreeType,
and you probably have a version of FreeType installed on your system
that is more recent than the one fontconfig was compiled with.

this also explains the parameter insanity.

try installing fontconfig-2.3.93 or higher, this should fix the problem

Hope this helps,

- David Turner
- The FreeType Project  (www.freetype.org)


Frank Meerkoetter a écrit :

>Hi,
>
>i'm encountering other problems than allready reported with freetype
>on ARM.
>
>A segfault happens in this function:
>
>FT_CALLBACK_DEF( FT_Error )
>  TT_Access_Glyph_Frame( TT_Loader  loader,
>                         FT_UInt    glyph_index,
>                         FT_ULong   offset,
>                         FT_UInt    byte_count )
>  {
>    FT_Error   error;
>    FT_Stream  stream = loader->stream;
>
>    /* for non-debug mode */
>    FT_UNUSED( glyph_index );
>
>
>    FT_TRACE5(( "Glyph %ld\n", glyph_index ));
>
>    /* the following line sets the `error' variable through macros! */
>    if ( FT_STREAM_SEEK( offset ) || FT_FRAME_ENTER( byte_count ) )
>      return error;
>
>    return TT_Err_Ok;
>  }
>
>which is called from (a fontconfig function):
>
>static FT_Error
>GetScriptTags(FT_Face face, FT_ULong tabletag, FT_ULong **stags, FT_UShort
>*script_count)
>{
>    [...]
>    if ( !stream )
>       return TT_Err_Invalid_Face_Handle;
>
>    if (( error = tt_face->goto_table( tt_face, tabletag, stream, 0 ) ))  <----
>       return error;
>
>#0  TT_Access_Glyph_Frame (loader=0x40b1219c, glyph_index=264832,
>    offset=319872, byte_count=1196445523) at ttgload.c:215
>#1  0x40aec9c0 in GetScriptTags (face=0x4e180, tabletag=1196445523,
>    stags=0xbefff830, script_count=0xbefff82c) at fcfreetype.c:2747
>#2  0x40aecd90 in FcFontCapabilities (face=0x4e180) at fcfreetype.c:2835
>#3  0x40ae9d58 in FcFreeTypeQuery (
>    file=0x4ae20 "/usr/share/fonts/FreeMonoBoldOblique.ttf", id=0,
>    blanks=0x4fec8, count=0xbefff980) at fcfreetype.c:1411
>
>The strange thing is that the parameters seem to be screwed up:
>
>(dgb) frame 1
>#1  0x40aec9c0 in GetScriptTags (face=0x4e180, tabletag=1196445523,
>    stags=0xbefff830, script_count=0xbefff82c) at fcfreetype.c:2747
>2747        if (( error = tt_face->goto_table( tt_face, tabletag, stream, 0 ) 
>))
>(gdb) p tt_face
>$11 = (TT_Face) 0x4e180
>(gdb) p tabletag
>$12 = 1196445523
>(gdb) p stream
>$13 = (FT_Stream) 0x50188
>(gdb) frame 0
>#0  TT_Access_Glyph_Frame (loader=0x40b1219c, glyph_index=264832,
>    offset=319872, byte_count=1196445523) at ttgload.c:215
>215         if ( check && face->postscript.isFixedPitch )
>
>I'm using this gcc:
>arm-linux-gcc --v
>Reading specs from
>/usr/local/uClibc-DaVinci/lib/gcc/arm-linux-uclibc/3.4.3/specs
>Configured with:
>/home/frank/avos_tmp/avx/buildroot/toolchain_build_arm_nofpu/gcc-3.4.3/configure
>--prefix=/usr/local/uClibc-DaVinci --build=i386-pc-linux-gnu
>--host=i386-pc-linux-gnu --target=arm-linux-uclibc --enable-languages=c,c++
>--enable-shared --disable-__cxa_atexit --enable-target-optspace --with-gnu-ld
>--disable-nls --enable-threads --disable-multilib --with-float=soft
>--with-cpu=arm926ejs --enable-cxx-flags=-mcpu=arm926ejs : (reconfigured)
>/home/frank/avos_tmp/avx/buildroot/toolchain_build_arm_nofpu/gcc-3.4.3/configure
>--prefix=/usr/local/uClibc-DaVinci --build=i386-pc-linux-gnu
>--host=i386-pc-linux-gnu --target=arm-linux-uclibc --enable-languages=c,c++
>--enable-shared --disable-__cxa_atexit --enable-target-optspace --with-gnu-ld
>--disable-nls --enable-threads --disable-multilib --with-float=soft
>--with-cpu=arm926ejs --enable-cxx-flags=-mcpu=arm926ejs
>Thread model: posix
>gcc version 3.4.3
>
>All optimizers are disabled.
>
>Any ideas?
>
>Regards,
>  Frank
>
>
>
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