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[base] Fix a dereference of uninitialized variable in PIC mode. 

* src/base/ftglyph.c (FT_Glyph_To_Bitmap): `glyph' must be
set before derefering to obtain `library'.  The initialization
of `clazz', `glyph', `library' and NULL pointer check are
reordered to minimize PIC conditonals.
This commit is contained in:
suzuki toshiya 2012-01-15 02:48:47 +09:00
parent 0614febcec
commit 09f3e41c25
2 changed files with 21 additions and 12 deletions
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9
ChangeLog
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@ -1,3 +1,12 @@
2012-01-14 suzuki toshiya <mpsuzuki@hiroshima-u.ac.jp>
[base] Fix a dereference of uninitialized variable in PIC mode.
* src/base/ftglyph.c (FT_Glyph_To_Bitmap): `glyph' must be
set before derefering to obtain `library'. The initialization
of `clazz', `glyph', `library' and NULL pointer check are
reordered to minimize PIC conditonals.
2012-01-14 suzuki toshiya <mpsuzuki@hiroshima-u.ac.jp>
[base] Insert explict cast for GCC 4.6 in PIC mode.

24
src/base/ftglyph.c
View File

@ -512,42 +512,42 @@
FT_Error error = FT_Err_Ok;
FT_Glyph glyph;
FT_BitmapGlyph bitmap = NULL;
const FT_Glyph_Class* clazz;
#ifdef FT_CONFIG_OPTION_PIC
FT_Library library = FT_GLYPH( glyph )->library;
#endif
/* FT_BITMAP_GLYPH_CLASS_GET derefers `library' in PIC mode */
FT_Library library;
/* check argument */
if ( !the_glyph )
goto Bad;
/* we render the glyph into a glyph bitmap using a `dummy' glyph slot */
/* then calling FT_Render_Glyph_Internal() */
glyph = *the_glyph;
if ( !glyph )
goto Bad;
clazz = glyph->clazz;
clazz = glyph->clazz;
library = glyph->library;
if ( !library || !clazz )
goto Bad;
/* when called with a bitmap glyph, do nothing and return successfully */
if ( clazz == FT_BITMAP_GLYPH_CLASS_GET )
goto Exit;
if ( !clazz || !clazz->glyph_prepare )
if ( !clazz->glyph_prepare )
goto Bad;
/* we render the glyph into a glyph bitmap using a `dummy' glyph slot */
/* then calling FT_Render_Glyph_Internal() */
FT_MEM_ZERO( &dummy, sizeof ( dummy ) );
FT_MEM_ZERO( &dummy_internal, sizeof ( dummy_internal ) );
dummy.internal = &dummy_internal;
dummy.library = glyph->library;
dummy.library = library;
dummy.format = clazz->glyph_format;
/* create result bitmap glyph */
error = ft_new_glyph( glyph->library, FT_BITMAP_GLYPH_CLASS_GET,
error = ft_new_glyph( library, FT_BITMAP_GLYPH_CLASS_GET,
(FT_Glyph*)(void*)&bitmap );
if ( error )
goto Exit;