src/hotspot/share/services/management.cpp

@@ -2066,10 +2066,38 @@
   return (jlong)(((double)ticks / (double)os::elapsed_frequency())
                  * (double)1000.0);
 }
 #endif // INCLUDE_MANAGEMENT
 
+// Gets the amount of memory allocated on the Java heap for a single thread.
+// Returns -1 if the thread does not exist or has terminated.
+JVM_ENTRY(jlong, jmm_GetOneThreadsAllocatedMemory(JNIEnv *env, jlong thread_id))
+  if (thread_id < 0) {
+    THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
+               "Invalid thread ID", -1);
+  }
+
+  JavaThread* java_thread;
+
+  if (thread_id == 0) {
+    // current thread
+    java_thread = (JavaThread*)THREAD;
+    if (java_thread->is_Java_thread()) {
+      return java_thread->cooked_allocated_bytes();
+    }
+    return -1;
+  }
+
+  ThreadsListHandle tlh;
+  java_thread = tlh.list()->find_JavaThread_from_java_tid(thread_id);
+
+  if (java_thread != NULL) {
+    return java_thread->cooked_allocated_bytes();
+  }
+  return -1;
+JVM_END
+
 // Gets an array containing the amount of memory allocated on the Java
 // heap for a set of threads (in bytes).  Each element of the array is
 // the amount of memory allocated for the thread ID specified in the
 // corresponding entry in the given array of thread IDs; or -1 if the
 // thread does not exist or has terminated.

@@ -2190,10 +2218,11 @@
   jmm_GetThreadInfo,
   jmm_GetMemoryPools,
   jmm_GetMemoryManagers,
   jmm_GetMemoryPoolUsage,
   jmm_GetPeakMemoryPoolUsage,
+  jmm_GetOneThreadsAllocatedMemory,
   jmm_GetThreadAllocatedMemory,
   jmm_GetMemoryUsage,
   jmm_GetLongAttribute,
   jmm_GetBoolAttribute,
   jmm_SetBoolAttribute,