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...

1 files changed, 2 insertions, 4 deletions

diff --git a/src/mesa/shader/shader_api.c b/src/mesa/shader/shader_api.c
index 9c419c9903f..f12fa28d97b 100644
--- a/src/mesa/shader/shader_api.c
+++ b/src/mesa/shader/shader_api.c
@@ -80,8 +80,7 @@ _mesa_clear_shader_program_data(GLcontext *ctx,
        * original/unlinked program.
        */
       shProg->VertexProgram->Base.Parameters = NULL;
-      ctx->Driver.DeleteProgram(ctx, &shProg->VertexProgram->Base);
-      shProg->VertexProgram = NULL;
+      _mesa_reference_vertprog(ctx, &shProg->VertexProgram, NULL);
    }
 
    if (shProg->FragmentProgram) {
@@ -89,8 +88,7 @@ _mesa_clear_shader_program_data(GLcontext *ctx,
        * original/unlinked program.
        */
       shProg->FragmentProgram->Base.Parameters = NULL;
-      ctx->Driver.DeleteProgram(ctx, &shProg->FragmentProgram->Base);
-      shProg->FragmentProgram = NULL;
+      _mesa_reference_fragprog(ctx, &shProg->FragmentProgram, NULL);
    }
 
    if (shProg->Uniforms) {