<AWT Dev> [11][JDK-8171000]Robot.createScreenCapture() crashes in wayland mode

Sergey Bylokhov Sergey.Bylokhov at oracle.com
Mon Feb 5 04:29:13 UTC 2018

OK, then it looks fine.

On 03/02/2018 20:13, Krishna Addepalli wrote:
> Hi Sergey,
> I'm aware of the C99 thing, so I looked around in the file before making those changes. For example, within the same function that I modified, I found variable declarations inside the for loop:
>      for (reg = (image_region_type *) first_in_list( regions); reg;
>            reg = (image_region_type *) next_in_list( regions))
>       {
>                   int32_t rect;
>                   struct my_XRegion *vis_reg;
> And also, in couple of other places within the same file, the some variables were declared within if blocks. That's when I moved the variable declarations to the point of use.
> Thanks,
> Krishna
> -----Original Message-----
> From: Sergey Bylokhov
> Sent: Saturday, February 3, 2018 1:27 PM
> To: Krishna Addepalli <krishna.addepalli at oracle.com>; awt-dev at openjdk.java.net
> Subject: Re: <AWT Dev> [11][JDK-8171000]Robot.createScreenCapture() crashes in wayland mode
> Hi, Krishna.
> The change of local types declarations looks reasonable, but I am not sure that C99 will be supported by all compilers which will be used to build jdk where this fix will be used.
> I suggest to simplify the fix and add only one null check to it.
> On 01/02/2018 04:06, Krishna Addepalli wrote:
>> Hi All,
>> Please review a fix for JDK-8171000:
>> https://bugs.openjdk.java.net/browse/JDK-8171000
>> Webrev: http://cr.openjdk.java.net/~kaddepalli/8171000/webrev00/
>> The crash happens since XGetImage can return NULL in case of Wayland,
>> which doesnot permit reading screen pixels outside the owning window.
>> Added a null check to prevent the same, and also refactored and
>> removed unnecessary code to make the function simpler.
>> Thanks,
>> Krishna
> --
> Best regards, Sergey.

Best regards, Sergey.

More information about the awt-dev mailing list