revert

Author: offamitkumar

src/hotspot/cpu/s390/sharedRuntime_s390.cpp

@@ -3414,77 +3414,16 @@ int SpinPause() {
 
 #if INCLUDE_JFR
 
-// For c2: c_rarg0 is junk, call to runtime to write a checkpoint.
-// It returns a jobject handle to the event writer.
-// The handle is dereferenced and the return value is the event writer oop.
 RuntimeStub* SharedRuntime::generate_jfr_write_checkpoint() {
-  const char* name = SharedRuntime::stub_name(SharedStubId::jfr_write_checkpoint_id);
-  CodeBuffer code(name, 512, 64);
-  MacroAssembler* masm = new MacroAssembler(&code);
-
-  int framesize = frame::z_abi_160_size / VMRegImpl::stack_slot_size;
-  address start = __ pc();
-  __ save_return_pc(); // save return_pc (Z_R14)
-  __ push_frame_abi160(0);
-  int frame_complete = __ pc() - start;
-  __ set_last_Java_frame(Z_SP, noreg);
-
-  __ call_VM_leaf(CAST_FROM_FN_PTR(address, JfrIntrinsicSupport::write_checkpoint), Z_thread);
-  address calls_return_pc = __ last_calls_return_pc();
-
-  __ reset_last_Java_frame();
-
-  // The handle is dereferenced through a load barrier.
-  __ stop("fuck it");
-  __ resolve_global_jobject(Z_ARG1, Z_tmp_1, Z_tmp_2); // Z_R10 & Z_R11, are these live ?
-  __ pop_frame();
-  __ restore_return_pc();
-  __ z_br(Z_R14);
-
-  OopMapSet* oop_maps = new OopMapSet();
-  OopMap* map = new OopMap(framesize, 0);
-  oop_maps->add_gc_map(calls_return_pc - start, map);
-
-  RuntimeStub* stub = // codeBlob framesize is in words (not VMRegImpl::slot_size)
-    RuntimeStub::new_runtime_stub(name, &code, frame_complete,
-        (framesize >> (LogBytesPerWord - LogBytesPerInt)),
-        oop_maps, false);
-
-  return stub;
+  if (!Continuations::enabled()) return nullptr;
+  Unimplemented();
+  return nullptr;
 }
 
-// For c2: call to return a leased buffer.
 RuntimeStub* SharedRuntime::generate_jfr_return_lease() {
-  const char* name = SharedRuntime::stub_name(SharedStubId::jfr_return_lease_id);
-  CodeBuffer code(name, 512, 64);
-  MacroAssembler* masm = new MacroAssembler(&code);
-
-  int framesize = frame::z_abi_160_size / VMRegImpl::stack_slot_size;
-  address start = __ pc();
-  __ save_return_pc(); // save return_pc (Z_R14)
-  __ push_frame_abi160(0);
-  int frame_complete = __ pc() - start;
-  __ set_last_Java_frame(Z_SP, noreg);
-  __ stop("crahs here");
-  __ call_VM_leaf(CAST_FROM_FN_PTR(address, JfrIntrinsicSupport::return_lease), Z_thread);
-  address calls_return_pc = __ last_calls_return_pc();
-
-  __ reset_last_Java_frame();
-
-  __ pop_frame();
-  __ restore_return_pc();
-  __ z_br(Z_R14);
-
-  OopMapSet* oop_maps = new OopMapSet();
-  OopMap* map = new OopMap(framesize, 0);
-  oop_maps->add_gc_map(calls_return_pc - start, map);
-
-  RuntimeStub* stub = // codeBlob framesize is in words (not VMRegImpl::slot_size)
-    RuntimeStub::new_runtime_stub(name, &code, frame_complete,
-        (framesize >> (LogBytesPerWord - LogBytesPerInt)),
-        oop_maps, false);
-
-  return stub;
+  if (!Continuations::enabled()) return nullptr;
+  Unimplemented();
+  return nullptr;
 }
 
 #endif // INCLUDE_JFR