--- old/src/share/vm/opto/library_call.cpp	2019-02-15 19:02:37.302837717 +0300
+++ new/src/share/vm/opto/library_call.cpp	2019-02-15 19:02:37.206841071 +0300
@@ -27,6 +27,7 @@
 #include "classfile/vmSymbols.hpp"
 #include "compiler/compileBroker.hpp"
 #include "compiler/compileLog.hpp"
+#include "jfr/support/jfrIntrinsics.hpp"
 #include "oops/objArrayKlass.hpp"
 #include "opto/addnode.hpp"
 #include "opto/callGenerator.hpp"
@@ -40,7 +41,7 @@
 #include "opto/subnode.hpp"
 #include "prims/nativeLookup.hpp"
 #include "runtime/sharedRuntime.hpp"
-#include "trace/traceMacros.hpp"
+#include "utilities/macros.hpp"
 
 class LibraryIntrinsic : public InlineCallGenerator {
   // Extend the set of intrinsics known to the runtime:
@@ -236,9 +237,9 @@
   bool inline_unsafe_allocate();
   bool inline_unsafe_copyMemory();
   bool inline_native_currentThread();
-#ifdef TRACE_HAVE_INTRINSICS
+#ifdef JFR_HAVE_INTRINSICS
   bool inline_native_classID();
-  bool inline_native_threadID();
+  bool inline_native_getEventWriter();
 #endif
   bool inline_native_time_funcs(address method, const char* funcName);
   bool inline_native_isInterrupted();
@@ -879,10 +880,10 @@
   case vmIntrinsics::_currentThread:            return inline_native_currentThread();
   case vmIntrinsics::_isInterrupted:            return inline_native_isInterrupted();
 
-#ifdef TRACE_HAVE_INTRINSICS
-  case vmIntrinsics::_classID:                  return inline_native_classID();
-  case vmIntrinsics::_threadID:                 return inline_native_threadID();
-  case vmIntrinsics::_counterTime:              return inline_native_time_funcs(CAST_FROM_FN_PTR(address, TRACE_TIME_METHOD), "counterTime");
+#ifdef JFR_HAVE_INTRINSICS
+  case vmIntrinsics::_counterTime:              return inline_native_time_funcs(CAST_FROM_FN_PTR(address, JFR_TIME_FUNCTION), "counterTime");
+  case vmIntrinsics::_getClassId:               return inline_native_classID();
+  case vmIntrinsics::_getEventWriter:           return inline_native_getEventWriter();
 #endif
   case vmIntrinsics::_currentTimeMillis:        return inline_native_time_funcs(CAST_FROM_FN_PTR(address, os::javaTimeMillis), "currentTimeMillis");
   case vmIntrinsics::_nanoTime:                 return inline_native_time_funcs(CAST_FROM_FN_PTR(address, os::javaTimeNanos), "nanoTime");
@@ -3265,51 +3266,76 @@
   return true;
 }
 
-#ifdef TRACE_HAVE_INTRINSICS
+#ifdef JFR_HAVE_INTRINSICS
 /*
  * oop -> myklass
  * myklass->trace_id |= USED
  * return myklass->trace_id & ~0x3
  */
 bool LibraryCallKit::inline_native_classID() {
-  null_check_receiver();  // null-check, then ignore
-  Node* cls = null_check(argument(1), T_OBJECT);
+  Node* cls = null_check(argument(0), T_OBJECT);
   Node* kls = load_klass_from_mirror(cls, false, NULL, 0);
   kls = null_check(kls, T_OBJECT);
-  ByteSize offset = TRACE_ID_OFFSET;
+
+  ByteSize offset = KLASS_TRACE_ID_OFFSET;
   Node* insp = basic_plus_adr(kls, in_bytes(offset));
   Node* tvalue = make_load(NULL, insp, TypeLong::LONG, T_LONG, MemNode::unordered);
-  Node* bits = longcon(~0x03l); // ignore bit 0 & 1
-  Node* andl = _gvn.transform(new (C) AndLNode(tvalue, bits));
+
   Node* clsused = longcon(0x01l); // set the class bit
   Node* orl = _gvn.transform(new (C) OrLNode(tvalue, clsused));
-
   const TypePtr *adr_type = _gvn.type(insp)->isa_ptr();
   store_to_memory(control(), insp, orl, T_LONG, adr_type, MemNode::unordered);
-  set_result(andl);
+
+#ifdef TRACE_ID_META_BITS
+  Node* mbits = longcon(~TRACE_ID_META_BITS);
+  tvalue = _gvn.transform(new (C) AndLNode(tvalue, mbits));
+#endif
+#ifdef TRACE_ID_SHIFT
+  Node* cbits = intcon(TRACE_ID_SHIFT);
+  tvalue = _gvn.transform(new (C) URShiftLNode(tvalue, cbits));
+#endif
+
+  set_result(tvalue);
   return true;
 }
 
-bool LibraryCallKit::inline_native_threadID() {
-  Node* tls_ptr = NULL;
-  Node* cur_thr = generate_current_thread(tls_ptr);
-  Node* p = basic_plus_adr(top()/*!oop*/, tls_ptr, in_bytes(JavaThread::osthread_offset()));
-  Node* osthread = make_load(NULL, p, TypeRawPtr::NOTNULL, T_ADDRESS, MemNode::unordered);
-  p = basic_plus_adr(top()/*!oop*/, osthread, in_bytes(OSThread::thread_id_offset()));
-
-  Node* threadid = NULL;
-  size_t thread_id_size = OSThread::thread_id_size();
-  if (thread_id_size == (size_t) BytesPerLong) {
-    threadid = ConvL2I(make_load(control(), p, TypeLong::LONG, T_LONG, MemNode::unordered));
-  } else if (thread_id_size == (size_t) BytesPerInt) {
-    threadid = make_load(control(), p, TypeInt::INT, T_INT, MemNode::unordered);
-  } else {
-    ShouldNotReachHere();
-  }
-  set_result(threadid);
+bool LibraryCallKit::inline_native_getEventWriter() {
+  Node* tls_ptr = _gvn.transform(new (C) ThreadLocalNode());
+
+  Node* jobj_ptr = basic_plus_adr(top(), tls_ptr,
+                                  in_bytes(THREAD_LOCAL_WRITER_OFFSET_JFR)
+                                  );
+
+  Node* jobj = make_load(control(), jobj_ptr, TypeRawPtr::BOTTOM, T_ADDRESS, MemNode::unordered);
+
+  Node* jobj_cmp_null = _gvn.transform( new (C) CmpPNode(jobj, null()) );
+  Node* test_jobj_eq_null  = _gvn.transform( new (C) BoolNode(jobj_cmp_null, BoolTest::eq) );
+
+  IfNode* iff_jobj_null =
+    create_and_map_if(control(), test_jobj_eq_null, PROB_MIN, COUNT_UNKNOWN);
+
+  enum { _normal_path = 1,
+         _null_path = 2,
+         PATH_LIMIT };
+
+  RegionNode* result_rgn = new (C) RegionNode(PATH_LIMIT);
+  PhiNode*    result_val = new (C) PhiNode(result_rgn, TypePtr::BOTTOM);
+
+  Node* jobj_is_null = _gvn.transform(new (C) IfTrueNode(iff_jobj_null));
+  result_rgn->init_req(_null_path, jobj_is_null);
+  result_val->init_req(_null_path, null());
+
+  Node* jobj_is_not_null = _gvn.transform(new (C) IfFalseNode(iff_jobj_null));
+  result_rgn->init_req(_normal_path, jobj_is_not_null);
+
+  Node* res = make_load(jobj_is_not_null, jobj, TypeInstPtr::NOTNULL, T_OBJECT, MemNode::unordered);
+  result_val->init_req(_normal_path, res);
+
+  set_result(result_rgn, result_val);
+
   return true;
 }
-#endif
+#endif // JFR_HAVE_INTRINSICS
 
 //------------------------inline_native_time_funcs--------------
 // inline code for System.currentTimeMillis() and System.nanoTime()