P4 to Git Change 1315824 by asalmanp@asalmanp-opencl-stg on 2016/09/19 12:04:15

SWDEV-102417 - Forum [205433] : Memory leak with printf statement inside kernel code

	A memory leak can occur if a printf statement is inside the .cl source code but it is not used inside the __kernel code (e.g., a function inside .cl code that uses printf but never called by the __kernel). In this case compiler generates the printf metadata but printf is not used by the __kernel (i.e., the printf buffer is empty).

	To fix this issue, release the transfer buffer object before returning false in PrintfDbgHSA::output function.

	ReviewBoardURL = http://ocltc.amd.com/reviews/r/11394/

Affected files ...

... //depot/stg/opencl/drivers/opencl/runtime/device/gpu/gpuprintf.cpp#42 edit
... //depot/stg/opencl/drivers/opencl/runtime/device/pal/palprintf.cpp#3 edit

rocclr/runtime/device/gpu/gpuprintf.cpp

@@ -659,6 +659,7 @@ PrintfDbgHSA::output(
 
         if (offsetSize == 0) {
             LogError("\n The printf buffer is empty!");
+            dev().xferRead().release(gpu, *xferBufRead_);
             return false;
         }
 

rocclr/runtime/device/pal/palprintf.cpp

@@ -652,6 +652,7 @@ PrintfDbgHSA::output(
 
         if (offsetSize == 0) {
             LogError("\n The printf buffer is empty!");
+            dev().xferRead().release(gpu, *xferBufRead_);
             return false;
         }