Add force jmethodID experimental feature support

dd-java-agent/agent-profiling/profiling-controller/src/main/java/com/datadog/profiling/controller/ProfilerFlareReporter.java

@@ -352,6 +352,13 @@ private String getProfilerConfig() {
             ProfilingConfig.PROFILING_DATADOG_PROFILER_WALL_CONTEXT_FILTER,
             ProfilingConfig.PROFILING_DATADOG_PROFILER_WALL_CONTEXT_FILTER_DEFAULT),
         ProfilingConfig.PROFILING_DATADOG_PROFILER_WALL_CONTEXT_FILTER_DEFAULT);
+    appendConfig(
+        sb,
+        "DDProf Force Preload jmethodIDs",
+        configProvider.getBoolean(
+            ProfilingConfig.PROFILING_DATADOG_PROFILER_FORCE_JMETHODID,
+            ProfilingConfig.PROFILING_DATADOG_PROFILER_FORCE_JMETHODID_DEFAULT),
+        ProfilingConfig.PROFILING_DATADOG_PROFILER_FORCE_JMETHODID_DEFAULT);
     sb.append("\n=== DDProf Allocation Profiling ===\n");
     appendConfig(
         sb,

dd-java-agent/agent-profiling/profiling-ddprof/src/main/java/com/datadog/profiling/ddprof/DatadogProfiler.java

@@ -1,5 +1,6 @@
 package com.datadog.profiling.ddprof;
 
+import static com.datadog.profiling.ddprof.DatadogProfilerConfig.forceJMethodID;
 import static com.datadog.profiling.ddprof.DatadogProfilerConfig.getAllocationInterval;
 import static com.datadog.profiling.ddprof.DatadogProfilerConfig.getCStack;
 import static com.datadog.profiling.ddprof.DatadogProfilerConfig.getContextAttributes;
@@ -418,6 +419,12 @@ String cmdStartProfiling(Path file) throws IllegalStateException {
     if (omitLineNumbers(configProvider)) {
       cmd.append(",linenumbers=f");
     }
+
+    // Default is true
+    if (!forceJMethodID(configProvider)) {
+      cmd.append(",fjmethodid=false");
+    }
+
     if (profilingModes.contains(CPU)) {
       // cpu profiling is enabled.
       String schedulingEvent = getSchedulingEvent(configProvider);

dd-java-agent/agent-profiling/profiling-ddprof/src/main/java/com/datadog/profiling/ddprof/DatadogProfilerConfig.java

@@ -15,6 +15,8 @@
 import static datadog.trace.api.config.ProfilingConfig.PROFILING_DATADOG_PROFILER_CPU_INTERVAL_DEFAULT;
 import static datadog.trace.api.config.ProfilingConfig.PROFILING_DATADOG_PROFILER_CSTACK;
 import static datadog.trace.api.config.ProfilingConfig.PROFILING_DATADOG_PROFILER_CSTACK_DEFAULT;
+import static datadog.trace.api.config.ProfilingConfig.PROFILING_DATADOG_PROFILER_FORCE_JMETHODID;
+import static datadog.trace.api.config.ProfilingConfig.PROFILING_DATADOG_PROFILER_FORCE_JMETHODID_DEFAULT;
 import static datadog.trace.api.config.ProfilingConfig.PROFILING_DATADOG_PROFILER_LIBPATH;
 import static datadog.trace.api.config.ProfilingConfig.PROFILING_DATADOG_PROFILER_LINE_NUMBERS;
 import static datadog.trace.api.config.ProfilingConfig.PROFILING_DATADOG_PROFILER_LINE_NUMBERS_DEFAULT;
@@ -439,6 +441,13 @@ public static long getLong(ConfigProvider configProvider, String key) {
     return configProvider.getLong(key, configProvider.getLong(normalizeKey(key), -1));
   }
 
+  public static boolean forceJMethodID(ConfigProvider configProvider) {
+    return getBoolean(
+        configProvider,
+        PROFILING_DATADOG_PROFILER_FORCE_JMETHODID,
+        PROFILING_DATADOG_PROFILER_FORCE_JMETHODID_DEFAULT);
+  }
+
   private static String normalizeKey(String key) {
     return key.replace(".ddprof.", ".async.");
   }

dd-java-agent/agent-profiling/profiling-ddprof/src/test/java/com/datadog/profiling/ddprof/DatadogProfilerTest.java

@@ -108,6 +108,22 @@ private static Stream<Arguments> profilingModes() {
                 Arguments.of((x & 0x1000) != 0, (x & 0x100) != 0, (x & 0x10) != 0, (x & 0x1) != 0));
   }
 
+  @Test
+  void testStartCmdForceJMethodIDDisabled() throws Exception {
+    assertDoesNotThrow(
+        () -> DdprofLibraryLoader.jvmAccess().getReasonNotLoaded(), "Profiler not available");
+
+    Properties props = new Properties();
+    props.put(ProfilingConfig.PROFILING_DATADOG_PROFILER_FORCE_JMETHODID, "false");
+    DatadogProfiler profiler =
+        DatadogProfiler.newInstance(ConfigProvider.withPropertiesOverride(props));
+
+    Path targetFile = Paths.get("/tmp/target.jfr");
+    String cmd = profiler.cmdStartProfiling(targetFile);
+
+    assertTrue(cmd.contains(",fjmethodid=false"), cmd);
+  }
+
   @ParameterizedTest
   @MethodSource("wallContextFilterModes")
   void testWallContextFilter(boolean tracingEnabled, boolean contextFilterEnabled)

dd-trace-api/src/main/java/datadog/trace/api/config/ProfilingConfig.java

@@ -34,6 +34,12 @@ public final class ProfilingConfig {
   public static final String PROFILING_UPLOAD_TIMEOUT = "profiling.upload.timeout";
   public static final int PROFILING_UPLOAD_TIMEOUT_DEFAULT = 30;
 
+  // When set to false, ddprof skips preloading jmethodIDs for eligible system classes to reduce
+  // native memory usage. Default is true to preserve current behavior (force preloading).
+  public static final String PROFILING_DATADOG_PROFILER_FORCE_JMETHODID =
+      "profiling.experimental.ddprof.force_jmethodid";
+  public static final boolean PROFILING_DATADOG_PROFILER_FORCE_JMETHODID_DEFAULT = true;
+
   /**
    * @deprecated Use {@link #PROFILING_DEBUG_UPLOAD_COMPRESSION} instead. This will be removed in a
    *     future release.

metadata/supported-configurations.json

@@ -3121,6 +3121,14 @@
         "aliases": []
       }
     ],
+    "DD_PROFILING_EXPERIMENTAL_ASYNC_FORCE_JMETHODID": [
+      {
+        "version": "A",
+        "type": "boolean",
+        "default": "true",
+        "aliases": []
+      }
+    ],
     "DD_PROFILING_EXPERIMENTAL_ASYNC_SCHEDULING_EVENT": [
       {
         "version": "A",
@@ -3145,6 +3153,14 @@
         "aliases": []
       }
     ],
+    "DD_PROFILING_EXPERIMENTAL_DDPROF_FORCE_JMETHODID": [
+      {
+        "version": "A",
+        "type": "boolean",
+        "default": "true",
+        "aliases": []
+      }
+    ],
     "DD_PROFILING_EXPERIMENTAL_DDPROF_SCHEDULING_EVENT": [
       {
         "version": "A",