--- a/hotspot/src/share/vm/c1/c1_Compiler.cpp	Fri Oct 21 12:30:12 2016 +0300
+++ b/hotspot/src/share/vm/c1/c1_Compiler.cpp	Fri Oct 21 16:20:18 2016 +0200
@@ -223,6 +223,7 @@
   case vmIntrinsics::_putCharStringU:
 #ifdef TRACE_HAVE_INTRINSICS
   case vmIntrinsics::_counterTime:
+  case vmIntrinsics::_getBufferWriter:
 #if defined(_LP64) || !defined(TRACE_ID_CLASS_SHIFT)
   case vmIntrinsics::_getClassId:
 #endif

--- a/hotspot/src/share/vm/c1/c1_LIRGenerator.cpp	Fri Oct 21 12:30:12 2016 +0300
+++ b/hotspot/src/share/vm/c1/c1_LIRGenerator.cpp	Fri Oct 21 16:20:18 2016 +0200
@@ -3120,6 +3120,22 @@
 
   __ move(id, rlock_result(x));
 }
+
+void LIRGenerator::do_getBufferWriter(Intrinsic* x) {
+  LabelObj* L_end = new LabelObj();
+
+  LIR_Address* jobj_addr = new LIR_Address(getThreadPointer(),
+                                           in_bytes(TRACE_THREAD_DATA_WRITER_OFFSET),
+                                           T_OBJECT);
+  LIR_Opr result = rlock_result(x);
+  __ move_wide(jobj_addr, result);
+  __ cmp(lir_cond_equal, result, LIR_OprFact::oopConst(NULL));
+  __ branch(lir_cond_equal, T_OBJECT, L_end->label());
+  __ move_wide(new LIR_Address(result, T_OBJECT), result);
+
+  __ branch_destination(L_end->label());
+}
+
 #endif
 
 
@@ -3151,6 +3167,9 @@
   case vmIntrinsics::_getClassId:
     do_ClassIDIntrinsic(x);
     break;
+  case vmIntrinsics::_getBufferWriter:
+    do_getBufferWriter(x);
+    break;
   case vmIntrinsics::_counterTime:
     do_RuntimeCall(CAST_FROM_FN_PTR(address, TRACE_TIME_METHOD), x);
     break;

--- a/hotspot/src/share/vm/c1/c1_LIRGenerator.hpp	Fri Oct 21 12:30:12 2016 +0300
+++ b/hotspot/src/share/vm/c1/c1_LIRGenerator.hpp	Fri Oct 21 16:20:18 2016 +0200
@@ -441,6 +441,7 @@
 
 #ifdef TRACE_HAVE_INTRINSICS
   void do_ClassIDIntrinsic(Intrinsic* x);
+  void do_getBufferWriter(Intrinsic* x);
 #endif
 
   void do_RuntimeCall(address routine, Intrinsic* x);

--- a/hotspot/src/share/vm/opto/c2compiler.cpp	Fri Oct 21 12:30:12 2016 +0300
+++ b/hotspot/src/share/vm/opto/c2compiler.cpp	Fri Oct 21 16:20:18 2016 +0200
@@ -537,6 +537,7 @@
 #ifdef TRACE_HAVE_INTRINSICS
   case vmIntrinsics::_counterTime:
   case vmIntrinsics::_getClassId:
+  case vmIntrinsics::_getBufferWriter:
 #endif
   case vmIntrinsics::_currentTimeMillis:
   case vmIntrinsics::_nanoTime:

--- a/hotspot/src/share/vm/opto/library_call.cpp	Fri Oct 21 12:30:12 2016 +0300
+++ b/hotspot/src/share/vm/opto/library_call.cpp	Fri Oct 21 16:20:18 2016 +0200
@@ -256,6 +256,7 @@
   bool inline_native_time_funcs(address method, const char* funcName);
 #ifdef TRACE_HAVE_INTRINSICS
   bool inline_native_classID();
+  bool inline_native_getBufferWriter();
 #endif
   bool inline_native_isInterrupted();
   bool inline_native_Class_query(vmIntrinsics::ID id);
@@ -713,6 +714,7 @@
 #ifdef TRACE_HAVE_INTRINSICS
   case vmIntrinsics::_counterTime:              return inline_native_time_funcs(CAST_FROM_FN_PTR(address, TRACE_TIME_METHOD), "counterTime");
   case vmIntrinsics::_getClassId:               return inline_native_classID();
+  case vmIntrinsics::_getBufferWriter:          return inline_native_getBufferWriter();
 #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");
@@ -3198,6 +3200,44 @@
 
 }
 
+bool LibraryCallKit::inline_native_getBufferWriter() {
+  Node* tls_ptr = _gvn.transform(new ThreadLocalNode());
+
+  Node* jobj_ptr = basic_plus_adr(top(), tls_ptr,
+                                  in_bytes(TRACE_THREAD_DATA_WRITER_OFFSET)
+                                  );
+
+  Node* jobj = make_load(control(), jobj_ptr, TypeRawPtr::BOTTOM, T_ADDRESS, MemNode::unordered);
+
+  Node* jobj_cmp_null = _gvn.transform( new CmpPNode(jobj, null()) );
+  Node* test_jobj_eq_null  = _gvn.transform( new BoolNode(jobj_cmp_null, BoolTest::eq) );
+
+  IfNode* iff_jobj_null =
+    create_and_map_if(control(), test_jobj_eq_null, PROB_NEVER, COUNT_UNKNOWN);
+
+   enum { _normal_path = 1,
+          _null_path = 2,
+          PATH_LIMIT };
+
+  RegionNode* result_rgn = new RegionNode(PATH_LIMIT);
+  PhiNode*    result_val = new PhiNode(result_rgn, TypePtr::BOTTOM);
+  record_for_igvn(result_rgn);
+
+  Node* jobj_is_null = _gvn.transform( new 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 IfFalseNode(iff_jobj_null) );
+  result_rgn->init_req(_normal_path, jobj_is_not_null);
+
+  Node* res = make_load(NULL, jobj, TypeInstPtr::BOTTOM, T_OBJECT, MemNode::unordered);
+  result_val->init_req(_normal_path, res);
+
+  set_result(result_rgn, result_val);
+
+  return true;
+}
+
 #endif
 
 //------------------------inline_native_currentThread------------------

--- a/hotspot/src/share/vm/trace/traceMacros.hpp	Fri Oct 21 12:30:12 2016 +0300
+++ b/hotspot/src/share/vm/trace/traceMacros.hpp	Fri Oct 21 16:20:18 2016 +0200
@@ -57,6 +57,8 @@
 #define TRACE_DEFINE_THREAD_TRACE_ID_OFFSET typedef int ___IGNORED_hs_trace_type5
 #define TRACE_THREAD_TRACE_ID_OFFSET in_ByteSize(0); ShouldNotReachHere()
 #define TRACE_DEFINE_THREAD_ID_SIZE typedef int ___IGNORED_hs_trace_type6
+#define TRACE_DEFINE_THREAD_DATA_WRITER_OFFSET typedef int ___IGNORED_hs_trace_type7
+#define TRACE_THREAD_DATA_WRITER_OFFSET in_ByteSize(0); ShouldNotReachHere()
 #define TRACE_TEMPLATES(template)
 #define TRACE_INTRINSICS(do_intrinsic, do_class, do_name, do_signature, do_alias)