From 29c703456a1af3f44d19e9ce6581607f354b02a1 Mon Sep 17 00:00:00 2001
From: Robert Toyonaga <rtoyonag@redhat.com>
Date: Thu, 12 Jun 2025 09:37:55 -0400
Subject: [PATCH 1/2] jfr substitutions

---
 .../core/jfr/Target_jdk_jfr_internal_JVM.java | 24 +++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/substratevm/src/com.oracle.svm.core/src/com/oracle/svm/core/jfr/Target_jdk_jfr_internal_JVM.java b/substratevm/src/com.oracle.svm.core/src/com/oracle/svm/core/jfr/Target_jdk_jfr_internal_JVM.java
index 1a196b5bbbc1..db6064066d83 100644
--- a/substratevm/src/com.oracle.svm.core/src/com/oracle/svm/core/jfr/Target_jdk_jfr_internal_JVM.java
+++ b/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 {

From a3104c76b1171fd14d73c546b5fc615710458ad2 Mon Sep 17 00:00:00 2001
From: Robert Toyonaga <rtoyonag@redhat.com>
Date: Thu, 12 Jun 2025 10:21:34 -0400
Subject: [PATCH 2/2] fix style

---
 .../oracle/svm/core/jfr/Target_jdk_jfr_internal_JVM.java  | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/substratevm/src/com.oracle.svm.core/src/com/oracle/svm/core/jfr/Target_jdk_jfr_internal_JVM.java b/substratevm/src/com.oracle.svm.core/src/com/oracle/svm/core/jfr/Target_jdk_jfr_internal_JVM.java
index db6064066d83..95e0dd439cf4 100644
--- a/substratevm/src/com.oracle.svm.core/src/com/oracle/svm/core/jfr/Target_jdk_jfr_internal_JVM.java
+++ b/substratevm/src/com.oracle.svm.core/src/com/oracle/svm/core/jfr/Target_jdk_jfr_internal_JVM.java
@@ -662,10 +662,10 @@ public static boolean isProduct() {
     /** See {@link JVM#setMethodTraceFilters}. */
     @Substitute
     public static long[] setMethodTraceFilters(
-            String[] classes,
-            String[] methods,
-            String[] annotations,
-            int[] modification) {
+                    String[] classes,
+                    String[] methods,
+                    String[] annotations,
+                    int[] modification) {
         // JFR method tracing is not supported. No filters can be used so return null.
         return null;
     }