On 12 February 2016 at 02:28, Matt Turner <matts...@gmail.com> wrote:
> On Thu, Feb 11, 2016 at 4:54 PM, Emil Velikov <emil.l.veli...@gmail.com>
> wrote:
>> On 11 February 2016 at 12:04, Tapani Pälli <tapani.pa...@intel.com> wrote:
>>> From: Bernard Kilarski <bernard.r.kilar...@intel.com>
>>>
>>> Signed-off-by: Bernard Kilarski <bernard.r.kilar...@intel.com>
>>> Signed-off-by: Matt Roper <matthew.d.ro...@intel.com>
>>> Cc: "11.0 11.1" <mesa-sta...@lists.freedesktop.org
>>> ---
>>> src/glx/glxcmds.c | 2 +-
>>> src/glx/query_renderer.c | 4 ++--
>>> src/glx/tests/query_renderer_unittest.cpp | 4 ++++
>>> 3 files changed, 7 insertions(+), 3 deletions(-)
>>>
>>> diff --git a/src/glx/glxcmds.c b/src/glx/glxcmds.c
>>> index 93e8db5..4db67ec 100644
>>> --- a/src/glx/glxcmds.c
>>> +++ b/src/glx/glxcmds.c
>>> @@ -1727,7 +1727,7 @@ __glXSwapIntervalSGI(int interval)
>>> CARD32 *interval_ptr;
>>> CARD8 opcode;
>>>
>>> - if (gc == NULL) {
>>> + if (gc == NULL || gc == &dummyContext) {
>>> return GLX_BAD_CONTEXT;
>>> }
>>>
>>> diff --git a/src/glx/query_renderer.c b/src/glx/query_renderer.c
>>> index 9108ec2..d49b8fe 100644
>>> --- a/src/glx/query_renderer.c
>>> +++ b/src/glx/query_renderer.c
>>> @@ -106,7 +106,7 @@ glXQueryCurrentRendererIntegerMESA(int attribute,
>>> unsigned int *value)
>>> {
>>> struct glx_context *gc = __glXGetCurrentContext();
>>>
>>> - if (gc == NULL)
>>> + if (gc == NULL || gc == &dummyContext)
>>> return False;
>>>
>>> return __glXQueryRendererInteger(gc->psc, attribute, value);
>>> @@ -166,7 +166,7 @@ glXQueryCurrentRendererStringMESA(int attribute)
>>> {
>>> struct glx_context *gc = __glXGetCurrentContext();
>>>
>>> - if (gc == NULL)
>>> + if (gc == NULL || gc == &dummyContext)
>> Unless I'm missing something __glXGetCurrentContext() can never return
>> NULL, right ?
>>
>> In that case I see two possible solutions
>> - Swap all the NULL checks, for == &dummyContext (some commit
>> message would be great) or
>> - Drop the null checks in this patch, and explain why we do that only
>> here (the xid and vtable are implicitly zeroed for dummyContext, thus
>> things will just work).
>>
>> Leaning for the latter for stable as it's shorter. Although doing the
>> former on top (for master alone) also sounds like a good idea imho.
>>
>>> return False;
>>>
>>> return __glXQueryRendererString(gc->psc, attribute);
>>> diff --git a/src/glx/tests/query_renderer_unittest.cpp
>>> b/src/glx/tests/query_renderer_unittest.cpp
>>> index 2f3c4ef..4c96260 100644
>>> --- a/src/glx/tests/query_renderer_unittest.cpp
>>> +++ b/src/glx/tests/query_renderer_unittest.cpp
>>> @@ -40,6 +40,10 @@ struct attribute_test_vector {
>>> #define E(x) { # x, x }
>>>
>>>
>>> +/* This is necessary so that we don't have to link with glxcurrent.c
>>> + * which would require us to link with X libraries and what not.
>>> + */
>>> +struct glx_context dummyContext;
>>>
>> Perhaps we should initialize it (like in glxcurrent.c) for
>> consistency, if anything else ?
>
> Global variables are initialized. :)
I was referring to "initialize it with the same data as glxcurrent.c".
Pardon if it wasn't clear enough.
Such that should current/new tests, flex a code path that relies on
the specific initial values things don't blow up.
-Emil
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