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Bug 1425346 - lock access to cairo_ft_unscaled_font_t's faces list. r=jrmuizel

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MozReview-Commit-ID: GjIiO7P9Wak
This commit is contained in:
Lee Salzman 2018-01-09 16:18:38 -05:00
parent fb578c1b74
commit 08bc97046a
1 changed files with 24 additions and 14 deletions
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38
gfx/cairo/cairo/src/cairo-ft-font.c
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@ -2705,21 +2705,23 @@ _cairo_ft_font_face_destroy (void *abstract_face)
* font_face <------- unscaled
*/
if (font_face->unscaled &&
font_face->unscaled->from_face &&
font_face->next == NULL &&
font_face->unscaled->faces == font_face &&
CAIRO_REFERENCE_COUNT_GET_VALUE (&font_face->unscaled->base.ref_count) > 1)
if (font_face->unscaled)
{
cairo_font_face_reference (&font_face->base);
CAIRO_MUTEX_LOCK (font_face->unscaled->mutex);
_cairo_unscaled_font_destroy (&font_face->unscaled->base);
font_face->unscaled = NULL;
if (font_face->unscaled->from_face &&
font_face->next == NULL &&
font_face->unscaled->faces == font_face &&
CAIRO_REFERENCE_COUNT_GET_VALUE (&font_face->unscaled->base.ref_count) > 1)
{
cairo_font_face_reference (&font_face->base);
return;
}
CAIRO_MUTEX_UNLOCK (font_face->unscaled->mutex);
_cairo_unscaled_font_destroy (&font_face->unscaled->base);
font_face->unscaled = NULL;
return;
}
if (font_face->unscaled) {
cairo_ft_font_face_t *tmp_face = NULL;
cairo_ft_font_face_t *last_face = NULL;
@ -2738,6 +2740,7 @@ _cairo_ft_font_face_destroy (void *abstract_face)
last_face = tmp_face;
}
CAIRO_MUTEX_UNLOCK (font_face->unscaled->mutex);
_cairo_unscaled_font_destroy (&font_face->unscaled->base);
font_face->unscaled = NULL;
}
@ -2855,6 +2858,8 @@ _cairo_ft_font_face_create (cairo_ft_unscaled_font_t *unscaled,
{
cairo_ft_font_face_t *font_face, **prev_font_face;
CAIRO_MUTEX_LOCK (unscaled->mutex);
/* Looked for an existing matching font face */
for (font_face = unscaled->faces, prev_font_face = &unscaled->faces;
font_face;
@ -2876,15 +2881,19 @@ _cairo_ft_font_face_create (cairo_ft_unscaled_font_t *unscaled,
* from owner to ownee. */
font_face->unscaled = unscaled;
_cairo_unscaled_font_reference (&unscaled->base);
return &font_face->base;
} else
return cairo_font_face_reference (&font_face->base);
} else {
cairo_font_face_reference (&font_face->base);
}
CAIRO_MUTEX_UNLOCK (unscaled->mutex);
return &font_face->base;
}
}
/* No match found, create a new one */
font_face = malloc (sizeof (cairo_ft_font_face_t));
if (unlikely (!font_face)) {
CAIRO_MUTEX_UNLOCK (unscaled->mutex);
_cairo_error_throw (CAIRO_STATUS_NO_MEMORY);
return (cairo_font_face_t *)&_cairo_font_face_nil;
}
@ -2911,6 +2920,7 @@ _cairo_ft_font_face_create (cairo_ft_unscaled_font_t *unscaled,
_cairo_font_face_init (&font_face->base, &_cairo_ft_font_face_backend);
CAIRO_MUTEX_UNLOCK (unscaled->mutex);
return &font_face->base;
}