[Mesa-dev] [PATCH 1/2] mesa: Make glGet queries initialize ctx->Debug when necessary.

[Kenneth Graunke]

dEQP-GLES31.functional.debug.state_query.debug_group_stack_depth_*
tries to call glGet on GL_DEBUG_GROUP_STACK_DEPTH right away, before
doing any other debug setup.  This should return 1.

However, because ctx->Debug wasn't allocated, we bailed and returned 0.

This patch removes the open-coded locking and switches the two glGet
functions to use _mesa_lock_debug_state(), which takes care of
allocating and initializing that state on the first time.  It also
conveniently takes care of unlocking on failure for us, so we don't
need to handle that in every caller.

Fixes dEQP-GLES31.functional.debug.state_query.debug_group_stack_depth_
{getboolean,getfloat,getinteger,getinteger64}.

Signed-off-by: Kenneth Graunke <kenneth at whitecape.org>
---
 src/mesa/main/debug_output.c | 20 ++++++--------------
 1 file changed, 6 insertions(+), 14 deletions(-)

diff --git a/src/mesa/main/debug_output.c b/src/mesa/main/debug_output.c
index 10ee675..c2b9f05 100644
--- a/src/mesa/main/debug_output.c
+++ b/src/mesa/main/debug_output.c
@@ -761,15 +761,11 @@ _mesa_set_debug_state_int(struct gl_context *ctx, GLenum pname, GLint val)
 GLint
 _mesa_get_debug_state_int(struct gl_context *ctx, GLenum pname)
 {
-   struct gl_debug_state *debug;
    GLint val;
 
-   mtx_lock(&ctx->DebugMutex);
-   debug = ctx->Debug;
-   if (!debug) {
-      mtx_unlock(&ctx->DebugMutex);
+   struct gl_debug_state *debug = _mesa_lock_debug_state(ctx);
+   if (!debug)
       return 0;
-   }
 
    switch (pname) {
    case GL_DEBUG_OUTPUT:
@@ -794,7 +790,7 @@ _mesa_get_debug_state_int(struct gl_context *ctx, GLenum pname)
       break;
    }
 
-   mtx_unlock(&ctx->DebugMutex);
+   _mesa_unlock_debug_state(ctx);
 
    return val;
 }
@@ -806,15 +802,11 @@ _mesa_get_debug_state_int(struct gl_context *ctx, GLenum pname)
 void *
 _mesa_get_debug_state_ptr(struct gl_context *ctx, GLenum pname)
 {
-   struct gl_debug_state *debug;
    void *val;
+   struct gl_debug_state *debug = _mesa_lock_debug_state(ctx);
 
-   mtx_lock(&ctx->DebugMutex);
-   debug = ctx->Debug;
-   if (!debug) {
-      mtx_unlock(&ctx->DebugMutex);
+   if (!debug)
       return NULL;
-   }
 
    switch (pname) {
    case GL_DEBUG_CALLBACK_FUNCTION_ARB:
@@ -829,7 +821,7 @@ _mesa_get_debug_state_ptr(struct gl_context *ctx, GLenum pname)
       break;
    }
 
-   mtx_unlock(&ctx->DebugMutex);
+   _mesa_unlock_debug_state(ctx);
 
    return val;
 }
-- 
2.7.2