<AWT Dev> [14] RFR 8230782: Robot.createScreenCapture() fails if “awt.robot.gtk” is set to false

Dmitry Markov dmitry.markov at oracle.com
Thu Sep 19 16:12:24 UTC 2019


Could you review a fix for jdk14, please?

 bug: https://bugs.openjdk.java.net/browse/JDK-8230782
 webrev: http://cr.openjdk.java.net/~dmarkov/8230782/webrev.00/

Problem description:
After integration of JDK-8210776 [1] we started to use malloc() function for allocation of XColor array in QueryColorMap() (see multiVis.c). However malloc() does not initialise allocated memory. So if the memory contains some “garbage” we may get incorrect data inside the array. As a result Robot.createsScreenCapture() retrieves incorrect colours.

It is necessary to invoke calloc() for allocation of the array as it used to be before XWD upgrade


[1] - https://bugs.openjdk.java.net/browse/JDK-8210776
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