[Mesa-dev] [PATCH] st/mesa: fix sampler_view REALLOC/FREE macro mix-up

[Brian Paul]

We were using REALLOC() from u_memory.h but FREE() from imports.h.
This mismatch caused us to trash the heap on Windows after we
deleted a texture object.

This fixes a regression from commit 6c59be7776e4d.
---
 src/mesa/state_tracker/st_cb_texture.c |    2 +-
 src/mesa/state_tracker/st_texture.c    |   12 ++++++++++++
 src/mesa/state_tracker/st_texture.h    |    3 +++
 3 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/src/mesa/state_tracker/st_cb_texture.c b/src/mesa/state_tracker/st_cb_texture.c
index 353415b..304dc91 100644
--- a/src/mesa/state_tracker/st_cb_texture.c
+++ b/src/mesa/state_tracker/st_cb_texture.c
@@ -155,7 +155,7 @@ st_DeleteTextureObject(struct gl_context *ctx,
 
    pipe_resource_reference(&stObj->pt, NULL);
    st_texture_release_all_sampler_views(stObj);
-   FREE(stObj->sampler_views);
+   st_texture_free_sampler_views(stObj);
    _mesa_delete_texture_object(ctx, texObj);
 }
 
diff --git a/src/mesa/state_tracker/st_texture.c b/src/mesa/state_tracker/st_texture.c
index 8d559df..cfa0605 100644
--- a/src/mesa/state_tracker/st_texture.c
+++ b/src/mesa/state_tracker/st_texture.c
@@ -483,3 +483,15 @@ st_texture_release_all_sampler_views(struct st_texture_object *stObj)
    for (i = 0; i < stObj->num_sampler_views; ++i)
       pipe_sampler_view_reference(&stObj->sampler_views[i], NULL);
 }
+
+
+void
+st_texture_free_sampler_views(struct st_texture_object *stObj)
+{
+   /* NOTE:
+    * We use FREE() here to match REALLOC() above.  Both come from
+    * u_memory.h, not imports.h.  If we mis-match MALLOC/FREE from
+    * those two headers we can trash the heap.
+    */
+   FREE(stObj->sampler_views);
+}
diff --git a/src/mesa/state_tracker/st_texture.h b/src/mesa/state_tracker/st_texture.h
index 87de9f9..f2afaf1 100644
--- a/src/mesa/state_tracker/st_texture.h
+++ b/src/mesa/state_tracker/st_texture.h
@@ -241,4 +241,7 @@ st_texture_release_sampler_view(struct st_context *st,
 extern void
 st_texture_release_all_sampler_views(struct st_texture_object *stObj);
 
+void
+st_texture_free_sampler_views(struct st_texture_object *stObj);
+
 #endif
-- 
1.7.10.4