src/hotspot/share/prims/jvm.cpp

*** 3731,3740 ****
--- 3731,3763 ----
    Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
    assert(k->is_klass(), "just checking");
    HeapShared::initialize_from_archived_subgraph(k);
  JVM_END
  
+ JVM_ENTRY_NO_ENV(jlong, JVM_GetRandomSeedForCDSDump())
+   JVMWrapper("JVM_GetRandomSeedForCDSDump");
+   if (DumpSharedSpaces) {
+     const char* release = Abstract_VM_Version::vm_release();
+     const char* dbg_level = Abstract_VM_Version::jdk_debug_level();
+     const char* version = VM_Version::internal_vm_info_string();
+     jlong seed = (jlong)(java_lang_String::hash_code((const jbyte*)release, (int)strlen(release)) ^
+                          java_lang_String::hash_code((const jbyte*)dbg_level, (int)strlen(dbg_level)) ^
+                          java_lang_String::hash_code((const jbyte*)version, (int)strlen(version)));
+     seed += (jlong)Abstract_VM_Version::vm_major_version();
+     seed += (jlong)Abstract_VM_Version::vm_minor_version();
+     seed += (jlong)Abstract_VM_Version::vm_security_version();
+     seed += (jlong)Abstract_VM_Version::vm_patch_version();
+     if (seed == 0) { // don't let this ever be zero.
+       seed = 0x87654321;
+     }
+     log_debug(cds)("JVM_GetRandomSeedForCDSDump() = " JLONG_FORMAT, seed);
+     return seed;
+   } else {
+     return 0;
+   }
+ JVM_END
+ 
  // Returns an array of all live Thread objects (VM internal JavaThreads,
  // jvmti agent threads, and JNI attaching threads  are skipped)
  // See CR 6404306 regarding JNI attaching threads
  JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
    ResourceMark rm(THREAD);