--- a/src/share/vm/c1/c1_Runtime1.cpp	Sat Dec 17 20:50:09 2011 +0100
+++ b/src/share/vm/c1/c1_Runtime1.cpp	Sat Dec 17 21:40:27 2011 +0100
@@ -383,16 +383,10 @@
 JRT_END
 
 
-JRT_ENTRY(void, Runtime1::post_jvmti_exception_throw(JavaThread* thread))
-  if (JvmtiExport::can_post_on_exceptions()) {
-    vframeStream vfst(thread, true);
-    address bcp = vfst.method()->bcp_from(vfst.bci());
-    JvmtiExport::post_exception_throw(thread, vfst.method(), bcp, thread->exception_oop());
-  }
-JRT_END
-
-// This is a helper to allow us to safepoint but allow the outer entry
-// to be safepoint free if we need to do an osr
+// counter_overflow() is called from within C1-compiled methods. The enclosing method is the method
+// associated with the top activation record. The inlinee (that is possibly included in the enclosing
+// method) method oop is passed as an argument. In order to do that it is embedded in the code as
+// a constant.
 static nmethod* counter_overflow_helper(JavaThread* THREAD, int branch_bci, methodOopDesc* m) {
   nmethod* osr_nm = NULL;
   methodHandle method(THREAD, m);
@@ -428,7 +422,7 @@
     bci = branch_bci + offset;
   }
 
-  osr_nm = CompilationPolicy::policy()->event(enclosing_method, method, branch_bci, bci, level, THREAD);
+  osr_nm = CompilationPolicy::policy()->event(enclosing_method, method, branch_bci, bci, level, nm, THREAD);
   return osr_nm;
 }
 
@@ -789,6 +783,23 @@
   }
 JRT_END
 
+// Cf. OptoRuntime::deoptimize_caller_frame
+JRT_ENTRY(void, Runtime1::deoptimize(JavaThread* thread))
+  // Called from within the owner thread, so no need for safepoint
+  RegisterMap reg_map(thread, false);
+  frame stub_frame = thread->last_frame();
+  assert(stub_frame.is_runtime_frame(), "sanity check");
+  frame caller_frame = stub_frame.sender(&reg_map);
+
+  // We are coming from a compiled method; check this is true.
+  assert(CodeCache::find_nmethod(caller_frame.pc()) != NULL, "sanity");
+
+  // Deoptimize the caller frame.
+  Deoptimization::deoptimize_frame(thread, caller_frame.id());
+
+  // Return to the now deoptimized frame.
+JRT_END
+
 
 static klassOop resolve_field_return_klass(methodHandle caller, int bci, TRAPS) {
   Bytecode_field field_access(caller, bci);