svm: annotate *ThreadCpuTimeSupport with @BasedOnJDKFile

Author: zapster

substratevm/src/com.oracle.svm.core.posix/src/com/oracle/svm/core/posix/darwin/DarwinThreadCpuTimeSupport.java

@@ -24,6 +24,7 @@
  */
 package com.oracle.svm.core.posix.darwin;
 
+import com.oracle.svm.core.util.BasedOnJDKFile;
 import org.graalvm.nativeimage.CurrentIsolate;
 import org.graalvm.nativeimage.IsolateThread;
 import org.graalvm.nativeimage.StackValue;
@@ -54,10 +55,7 @@ public long getThreadCpuTime(IsolateThread isolateThread, boolean includeSystemT
         return getThreadCpuTime(machThread, includeSystemTime);
     }
 
-    /**
-     * Based on jdk-20-ga, see <a href=
-     * "https://github.com/openjdk/jdk20/blob/82749901b1497f524e53e47c45708c8e4a63c8b9/src/hotspot/os/bsd/os_bsd.cpp#L2314">os::thread_cpu_time</a>.
-     */
+    @BasedOnJDKFile("src/hotspot/os/bsd/os_bsd.cpp#L2382-L2407")
     @Uninterruptible(reason = "Called from uninterruptible code.", mayBeInlined = true)
     private static long getThreadCpuTime(int machThread, boolean includeSystemTime) {
         CIntPointer sizePointer = UnsafeStackValue.get(Integer.BYTES);

substratevm/src/com.oracle.svm.core.posix/src/com/oracle/svm/core/posix/linux/LinuxThreadCpuTimeSupport.java

@@ -24,6 +24,7 @@
  */
 package com.oracle.svm.core.posix.linux;
 
+import com.oracle.svm.core.util.BasedOnJDKFile;
 import org.graalvm.nativeimage.CurrentIsolate;
 import org.graalvm.nativeimage.IsolateThread;
 import org.graalvm.nativeimage.StackValue;
@@ -65,10 +66,7 @@ public long getThreadCpuTime(IsolateThread isolateThread, boolean includeSystemT
         return fastCpuTime(pthread);
     }
 
-    /**
-     * Based on jdk-20-ga, see <a href=
-     * "https://github.com/openjdk/jdk/blob/df6cf1e41d0fc2dd5f5c094f66c7c8969cf5548d/src/hotspot/os/linux/os_linux.cpp#L4976">fast_cpu_time(...)</a>.
-     */
+    @BasedOnJDKFile("src/hotspot/os/linux/os_linux.cpp#L5072-L5084")
     @Uninterruptible(reason = "Called from uninterruptible code.", mayBeInlined = true)
     private static long fastCpuTime(pthread_t pthread) {
         CIntPointer threadsClockId = StackValue.get(Integer.BYTES);

substratevm/src/com.oracle.svm.core.windows/src/com/oracle/svm/core/windows/WindowsThreadCpuTimeSupport.java

@@ -24,6 +24,7 @@
  */
 package com.oracle.svm.core.windows;
 
+import com.oracle.svm.core.util.BasedOnJDKFile;
 import org.graalvm.nativeimage.CurrentIsolate;
 import org.graalvm.nativeimage.IsolateThread;
 import org.graalvm.nativeimage.StackValue;
@@ -54,10 +55,7 @@ public long getThreadCpuTime(IsolateThread isolateThread, boolean includeSystemT
         return getThreadCpuTime(hThread, includeSystemTime);
     }
 
-    /**
-     * Based on jdk-20-ga, see <a href=
-     * "https://github.com/openjdk/jdk20/blob/82749901b1497f524e53e47c45708c8e4a63c8b9/src/hotspot/os/windows/os_windows.cpp#L4609">os::thread_cpu_time</a>.
-     */
+    @BasedOnJDKFile("src/hotspot/os/windows/os_windows.cpp#L4709-L4725")
     @Uninterruptible(reason = "Called from uninterruptible code.", mayBeInlined = true)
     private static long getThreadCpuTime(HANDLE hThread, boolean includeSystemTime) {
         FILETIME create = StackValue.get(FILETIME.class);