--- a/hotspot/src/cpu/sparc/vm/templateTable_sparc.cpp	Wed Apr 20 18:29:35 2011 -0700
+++ b/hotspot/src/cpu/sparc/vm/templateTable_sparc.cpp	Thu Apr 21 00:25:40 2011 -0700
@@ -3289,8 +3289,6 @@
                              /*virtual*/ false, /*vfinal*/ false, /*indy*/ true);
   __ mov(SP, O5_savedSP);  // record SP that we wanted the callee to restore
 
-  __ verify_oop(G5_callsite);
-
   // profile this call
   __ profile_call(O4);
 
@@ -3303,8 +3301,10 @@
   __ sll(Rret, LogBytesPerWord, Rret);
   __ ld_ptr(Rtemp, Rret, Rret);  // get return address
 
+  __ verify_oop(G5_callsite);
   __ load_heap_oop(G5_callsite, __ delayed_value(java_lang_invoke_CallSite::target_offset_in_bytes, Rscratch), G3_method_handle);
   __ null_check(G3_method_handle);
+  __ verify_oop(G3_method_handle);
 
   // Adjust Rret first so Llast_SP can be same as Rret
   __ add(Rret, -frame::pc_return_offset, O7);

--- a/hotspot/src/cpu/x86/vm/templateTable_x86_32.cpp	Wed Apr 20 18:29:35 2011 -0700
+++ b/hotspot/src/cpu/x86/vm/templateTable_x86_32.cpp	Thu Apr 21 00:25:40 2011 -0700
@@ -3074,6 +3074,7 @@
 
 void TemplateTable::invokedynamic(int byte_no) {
   transition(vtos, vtos);
+  assert(byte_no == f1_oop, "use this argument");
 
   if (!EnableInvokeDynamic) {
     // We should not encounter this bytecode if !EnableInvokeDynamic.
@@ -3086,7 +3087,6 @@
     return;
   }
 
-  assert(byte_no == f1_oop, "use this argument");
   prepare_invoke(rax, rbx, byte_no);
 
   // rax: CallSite object (f1)
@@ -3097,14 +3097,14 @@
   Register rax_callsite      = rax;
   Register rcx_method_handle = rcx;
 
-  if (ProfileInterpreter) {
-    // %%% should make a type profile for any invokedynamic that takes a ref argument
-    // profile this call
-    __ profile_call(rsi);
-  }
-
-  __ load_heap_oop(rcx_method_handle, Address(rax_callsite, __ delayed_value(java_lang_invoke_CallSite::target_offset_in_bytes, rcx)));
+  // %%% should make a type profile for any invokedynamic that takes a ref argument
+  // profile this call
+  __ profile_call(rsi);
+
+  __ verify_oop(rax_callsite);
+  __ load_heap_oop(rcx_method_handle, Address(rax_callsite, __ delayed_value(java_lang_invoke_CallSite::target_offset_in_bytes, rdx)));
   __ null_check(rcx_method_handle);
+  __ verify_oop(rcx_method_handle);
   __ prepare_to_jump_from_interpreted();
   __ jump_to_method_handle_entry(rcx_method_handle, rdx);
 }

--- a/hotspot/src/cpu/x86/vm/templateTable_x86_64.cpp	Wed Apr 20 18:29:35 2011 -0700
+++ b/hotspot/src/cpu/x86/vm/templateTable_x86_64.cpp	Thu Apr 21 00:25:40 2011 -0700
@@ -3128,7 +3128,6 @@
     return;
   }
 
-  assert(byte_no == f1_oop, "use this argument");
   prepare_invoke(rax, rbx, byte_no);
 
   // rax: CallSite object (f1)
@@ -3139,14 +3138,14 @@
   Register rax_callsite      = rax;
   Register rcx_method_handle = rcx;
 
-  if (ProfileInterpreter) {
-    // %%% should make a type profile for any invokedynamic that takes a ref argument
-    // profile this call
-    __ profile_call(r13);
-  }
-
-  __ load_heap_oop(rcx_method_handle, Address(rax_callsite, __ delayed_value(java_lang_invoke_CallSite::target_offset_in_bytes, rcx)));
+  // %%% should make a type profile for any invokedynamic that takes a ref argument
+  // profile this call
+  __ profile_call(r13);
+
+  __ verify_oop(rax_callsite);
+  __ load_heap_oop(rcx_method_handle, Address(rax_callsite, __ delayed_value(java_lang_invoke_CallSite::target_offset_in_bytes, rdx)));
   __ null_check(rcx_method_handle);
+  __ verify_oop(rcx_method_handle);
   __ prepare_to_jump_from_interpreted();
   __ jump_to_method_handle_entry(rcx_method_handle, rdx);
 }

--- a/hotspot/src/share/vm/ci/ciEnv.cpp	Wed Apr 20 18:29:35 2011 -0700
+++ b/hotspot/src/share/vm/ci/ciEnv.cpp	Thu Apr 21 00:25:40 2011 -0700
@@ -756,7 +756,7 @@
   assert(bc == Bytecodes::_invokedynamic, "must be invokedynamic");
 
   bool is_resolved = cpool->cache()->main_entry_at(index)->is_resolved(bc);
-  if (is_resolved && (oop) cpool->cache()->secondary_entry_at(index)->f1() == NULL)
+  if (is_resolved && cpool->cache()->secondary_entry_at(index)->is_f1_null())
     // FIXME: code generation could allow for null (unlinked) call site
     is_resolved = false;
 
@@ -770,7 +770,7 @@
 
   // Get the invoker methodOop from the constant pool.
   oop f1_value = cpool->cache()->main_entry_at(index)->f1();
-  methodOop signature_invoker = methodOop(f1_value);
+  methodOop signature_invoker = (methodOop) f1_value;
   assert(signature_invoker != NULL && signature_invoker->is_method() && signature_invoker->is_method_handle_invoke(),
          "correct result from LinkResolver::resolve_invokedynamic");
 

--- a/hotspot/src/share/vm/oops/cpCacheOop.cpp	Wed Apr 20 18:29:35 2011 -0700
+++ b/hotspot/src/share/vm/oops/cpCacheOop.cpp	Thu Apr 21 00:25:40 2011 -0700
@@ -104,7 +104,7 @@
   void* result = Atomic::cmpxchg_ptr(f1, f1_addr, NULL);
   bool success = (result == NULL);
   if (success) {
-    update_barrier_set(f1_addr, f1);
+    update_barrier_set((void*) f1_addr, f1);
   }
 }
 
@@ -275,21 +275,23 @@
   return (int) bsm_cache_index;
 }
 
-void ConstantPoolCacheEntry::set_dynamic_call(Handle call_site,
-                                              methodHandle signature_invoker) {
+void ConstantPoolCacheEntry::set_dynamic_call(Handle call_site, methodHandle signature_invoker) {
   assert(is_secondary_entry(), "");
+  // NOTE: it's important that all other values are set before f1 is
+  // set since some users short circuit on f1 being set
+  // (i.e. non-null) and that may result in uninitialized values for
+  // other racing threads (e.g. flags).
   int param_size = signature_invoker->size_of_parameters();
   assert(param_size >= 1, "method argument size must include MH.this");
-  param_size -= 1;              // do not count MH.this; it is not stacked for invokedynamic
-  if (Atomic::cmpxchg_ptr(call_site(), &_f1, NULL) == NULL) {
-    // racing threads might be trying to install their own favorites
-    set_f1(call_site());
-  }
+  param_size -= 1;  // do not count MH.this; it is not stacked for invokedynamic
   bool is_final = true;
   assert(signature_invoker->is_final_method(), "is_final");
-  set_flags(as_flags(as_TosState(signature_invoker->result_type()), is_final, false, false, false, true) | param_size);
+  int flags = as_flags(as_TosState(signature_invoker->result_type()), is_final, false, false, false, true) | param_size;
+  assert(_flags == 0 || _flags == flags, "flags should be the same");
+  set_flags(flags);
   // do not do set_bytecode on a secondary CP cache entry
   //set_bytecode_1(Bytecodes::_invokedynamic);
+  set_f1_if_null_atomic(call_site());  // This must be the last one to set (see NOTE above)!
 }