gallium: implement full reference counting for vertex/fragment programs

Use _mesa_reference_vert/fragprog() wherever we assign program pointers.
Fixes a memory corruption bug found with glean/api2 test.
Another memory bug involving shaders yet to be fixed...

Picked from gallium-0.1

3 files changed, 31 insertions, 3 deletions

diff --git a/src/mesa/state_tracker/st_atom_shader.c b/src/mesa/state_tracker/st_atom_shader.c
index 652500f52a2..7745591afba 100644
--- a/src/mesa/state_tracker/st_atom_shader.c
+++ b/src/mesa/state_tracker/st_atom_shader.c
@@ -39,6 +39,7 @@
 
 #include "main/imports.h"
 #include "main/mtypes.h"
+#include "shader/program.h"
 
 #include "pipe/p_context.h"
 #include "pipe/p_shader_tokens.h"
@@ -264,14 +265,16 @@ update_linkage( struct st_context *st )
     */
    assert(st->ctx->VertexProgram._Current);
    stvp = st_vertex_program(st->ctx->VertexProgram._Current);
+   assert(stvp->Base.Base.Target == GL_VERTEX_PROGRAM_ARB);
 
    assert(st->ctx->FragmentProgram._Current);
    stfp = st_fragment_program(st->ctx->FragmentProgram._Current);
+   assert(stfp->Base.Base.Target == GL_FRAGMENT_PROGRAM_ARB);
 
    xvp = find_translated_vp(st, stvp, stfp);
 
-   st->vp = stvp;
-   st->fp = stfp;
+   st_reference_vertprog(st, &st->vp, stvp);
+   st_reference_fragprog(st, &st->fp, stfp);
 
    cso_set_vertex_shader_handle(st->cso_context, stvp->driver_shader);
    cso_set_fragment_shader_handle(st->cso_context, stfp->driver_shader);
diff --git a/src/mesa/state_tracker/st_context.c b/src/mesa/state_tracker/st_context.c
index c900064f2b8..8db55a179f8 100644
--- a/src/mesa/state_tracker/st_context.c
+++ b/src/mesa/state_tracker/st_context.c
@@ -158,6 +158,9 @@ static void st_destroy_context_priv( struct st_context *st )
 {
    uint i;
 
+   st_reference_fragprog(st, &st->fp, NULL);
+   st_reference_vertprog(st, &st->vp, NULL);
+
    draw_destroy(st->draw);
    st_destroy_atoms( st );
    st_destroy_draw( st );
diff --git a/src/mesa/state_tracker/st_program.h b/src/mesa/state_tracker/st_program.h
index d8f26da2eeb..bf07a50789e 100644
--- a/src/mesa/state_tracker/st_program.h
+++ b/src/mesa/state_tracker/st_program.h
@@ -34,7 +34,8 @@
 #ifndef ST_PROGRAM_H
 #define ST_PROGRAM_H
 
-#include "mtypes.h"
+#include "main/mtypes.h"
+#include "shader/program.h"
 #include "pipe/p_shader_tokens.h"
 
 
@@ -115,6 +116,27 @@ st_vertex_program( struct gl_vertex_program *vp )
 }
 
 
+static INLINE void
+st_reference_vertprog(struct st_context *st,
+                      struct st_vertex_program **ptr,
+                      struct st_vertex_program *prog)
+{
+   _mesa_reference_program(st->ctx,
+                           (struct gl_program **) ptr,
+                           (struct gl_program *) prog);
+}
+
+static INLINE void
+st_reference_fragprog(struct st_context *st,
+                      struct st_fragment_program **ptr,
+                      struct st_fragment_program *prog)
+{
+   _mesa_reference_program(st->ctx,
+                           (struct gl_program **) ptr,
+                           (struct gl_program *) prog);
+}
+
+
 extern void
 st_translate_fragment_program(struct st_context *st,
                               struct st_fragment_program *fp,