--- a/src/share/vm/code/compiledIC.cpp	Tue Apr 07 11:20:51 2015 +0200
+++ b/src/share/vm/code/compiledIC.cpp	Tue Apr 07 14:58:49 2015 +0200
@@ -99,13 +99,13 @@
   }
 
   {
-  MutexLockerEx pl(Patching_lock, Mutex::_no_safepoint_check_flag);
+    MutexLockerEx pl(SafepointSynchronize::is_at_safepoint() ? NULL : Patching_lock, Mutex::_no_safepoint_check_flag);
 #ifdef ASSERT
-  CodeBlob* cb = CodeCache::find_blob_unsafe(_ic_call);
-  assert(cb != NULL && cb->is_nmethod(), "must be nmethod");
+    CodeBlob* cb = CodeCache::find_blob_unsafe(_ic_call);
+    assert(cb != NULL && cb->is_nmethod(), "must be nmethod");
 #endif
-  _ic_call->set_destination_mt_safe(entry_point);
-}
+     _ic_call->set_destination_mt_safe(entry_point);
+  }
 
   if (is_optimized() || is_icstub) {
     // Optimized call sites don't have a cache value and ICStub call
@@ -159,6 +159,50 @@
 //-----------------------------------------------------------------------------
 // High-level access to an inline cache. Guaranteed to be MT-safe.
 
+void CompiledIC::initialize_from_iter(RelocIterator* iter) {
+  assert(iter->addr() == _ic_call->instruction_address(), "must find ic_call");
+
+  if (iter->type() == relocInfo::virtual_call_type) {
+    virtual_call_Relocation* r = iter->virtual_call_reloc();
+    _is_optimized = false;
+    _value = nativeMovConstReg_at(r->cached_value());
+  } else {
+    assert(iter->type() == relocInfo::opt_virtual_call_type, "must be a virtual call");
+    _is_optimized = true;
+    _value = NULL;
+  }
+}
+
+CompiledIC::CompiledIC(nmethod* nm, NativeCall* call)
+  : _ic_call(call)
+{
+  address ic_call = _ic_call->instruction_address();
+
+  assert(ic_call != NULL, "ic_call address must be set");
+  assert(nm != NULL, "must pass nmethod");
+  assert(nm->contains(ic_call), "must be in nmethod");
+
+  // Search for the ic_call at the given address.
+  RelocIterator iter(nm, ic_call, ic_call+1);
+  bool ret = iter.next();
+  assert(ret == true, "relocInfo must exist at this address");
+  assert(iter.addr() == ic_call, "must find ic_call");
+
+  initialize_from_iter(&iter);
+}
+
+CompiledIC::CompiledIC(RelocIterator* iter)
+  : _ic_call(nativeCall_at(iter->addr()))
+{
+  address ic_call = _ic_call->instruction_address();
+
+  nmethod* nm = iter->code();
+  assert(ic_call != NULL, "ic_call address must be set");
+  assert(nm != NULL, "must pass nmethod");
+  assert(nm->contains(ic_call), "must be in nmethod");
+
+  initialize_from_iter(iter);
+}
 
 bool CompiledIC::set_to_megamorphic(CallInfo* call_info, Bytecodes::Code bytecode, TRAPS) {
   assert(CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "");
@@ -487,7 +531,7 @@
 void CompiledStaticCall::set_to_clean() {
   assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "mt unsafe call");
   // Reset call site
-  MutexLockerEx pl(Patching_lock, Mutex::_no_safepoint_check_flag);
+  MutexLockerEx pl(SafepointSynchronize::is_at_safepoint() ? NULL : Patching_lock, Mutex::_no_safepoint_check_flag);
 #ifdef ASSERT
   CodeBlob* cb = CodeCache::find_blob_unsafe(this);
   assert(cb != NULL && cb->is_nmethod(), "must be nmethod");
@@ -553,6 +597,7 @@
   } else {
     // Callee is interpreted code.  In any case entering the interpreter
     // puts a converter-frame on the stack to save arguments.
+    assert(!m->is_method_handle_intrinsic(), "Compiled code should never call interpreter MH intrinsics");
     info._to_interpreter = true;
     info._entry      = m()->get_c2i_entry();
   }