jfr substitutions

Author: roberttoyonaga

substratevm/src/com.oracle.svm.core/src/com/oracle/svm/core/jfr/Target_jdk_jfr_internal_JVM.java

@@ -296,6 +296,12 @@ public static void setMethodSamplingPeriod(long type, long intervalMillis) {
         SubstrateJVM.get().setMethodSamplingInterval(type, intervalMillis);
     }
 
+    /** See {@code JVM#setCPUThrottle}. */
+    @Substitute
+    public static void setCPUThrottle(double rate, boolean autoAdapt) {
+        // JFR CPUTimeSample is not supported.
+    }
+
     /** See {@link JVM#setOutput}. */
     @Substitute
     public static void setOutput(String file) {
@@ -652,6 +658,24 @@ public static boolean isProduct() {
          */
         return true;
     }
+
+    /** See {@link JVM#setMethodTraceFilters}. */
+    @Substitute
+    public static long[] setMethodTraceFilters(
+            String[] classes,
+            String[] methods,
+            String[] annotations,
+            int[] modification) {
+        // JFR method tracing is not supported. No filters can be used so return null.
+        return null;
+    }
+
+    /** See {@link JVM#drainStaleMethodTracerIds}. */
+    @Substitute
+    public static long[] drainStaleMethodTracerIds() {
+        // JFR method tracing is not supported. Return no stale IDs.
+        return null;
+    }
 }
 
 class Target_jdk_jfr_internal_JVM_Util {