--- a/hotspot/src/cpu/zero/vm/cppInterpreter_zero.cpp	Tue Nov 24 11:49:42 2009 -0800
+++ b/hotspot/src/cpu/zero/vm/cppInterpreter_zero.cpp	Fri Nov 27 07:56:58 2009 -0800
@@ -204,6 +204,20 @@
     goto unwind_and_return;
   }
 
+  // Update the invocation counter
+  if ((UseCompiler || CountCompiledCalls) && !method->is_synchronized()) {
+    thread->set_do_not_unlock();
+    InvocationCounter *counter = method->invocation_counter();
+    counter->increment();
+    if (counter->reached_InvocationLimit()) {
+      CALL_VM_NOCHECK(
+        InterpreterRuntime::frequency_counter_overflow(thread, NULL));
+      if (HAS_PENDING_EXCEPTION)
+        goto unwind_and_return;
+    }
+    thread->clr_do_not_unlock();
+  }
+
   // Lock if necessary
   BasicObjectLock *monitor;
   monitor = NULL;

--- a/hotspot/src/cpu/zero/vm/frame_zero.cpp	Tue Nov 24 11:49:42 2009 -0800
+++ b/hotspot/src/cpu/zero/vm/frame_zero.cpp	Fri Nov 27 07:56:58 2009 -0800
@@ -36,11 +36,8 @@
   return zeroframe()->is_interpreter_frame();
 }
 
-bool frame::is_fake_stub_frame() const {
-  return zeroframe()->is_fake_stub_frame();
-}
-
 frame frame::sender_for_entry_frame(RegisterMap *map) const {
+  assert(zeroframe()->is_entry_frame(), "wrong type of frame");
   assert(map != NULL, "map must be set");
   assert(!entry_frame_is_first(), "next Java fp must be non zero");
   assert(entry_frame_call_wrapper()->anchor()->last_Java_sp() == sender_sp(),
@@ -50,15 +47,10 @@
   return frame(sender_sp(), sp() + 1);
 }
 
-frame frame::sender_for_interpreter_frame(RegisterMap *map) const {
-  return frame(sender_sp(), sp() + 1);
-}
-
-frame frame::sender_for_compiled_frame(RegisterMap *map) const {
-  return frame(sender_sp(), sp() + 1);
-}
-
-frame frame::sender_for_fake_stub_frame(RegisterMap *map) const {
+frame frame::sender_for_nonentry_frame(RegisterMap *map) const {
+  assert(zeroframe()->is_interpreter_frame() ||
+         zeroframe()->is_shark_frame() ||
+         zeroframe()->is_fake_stub_frame(), "wrong type of frame");
   return frame(sender_sp(), sp() + 1);
 }
 
@@ -69,17 +61,8 @@
 
   if (is_entry_frame())
     return sender_for_entry_frame(map);
-
-  if (is_interpreted_frame())
-    return sender_for_interpreter_frame(map);
-
-  if (is_compiled_frame())
-    return sender_for_compiled_frame(map);
-
-  if (is_fake_stub_frame())
-    return sender_for_fake_stub_frame(map);
-
-  ShouldNotReachHere();
+  else
+    return sender_for_nonentry_frame(map);
 }
 
 #ifdef CC_INTERP

--- a/hotspot/src/cpu/zero/vm/frame_zero.hpp	Tue Nov 24 11:49:42 2009 -0800
+++ b/hotspot/src/cpu/zero/vm/frame_zero.hpp	Fri Nov 27 07:56:58 2009 -0800
@@ -65,10 +65,7 @@
   }
 
  public:
-  bool is_fake_stub_frame() const;
-
- public:
-  frame sender_for_fake_stub_frame(RegisterMap* map) const;
+  frame sender_for_nonentry_frame(RegisterMap* map) const;
 
  public:
   void zero_print_on_error(int           index,

--- a/hotspot/src/cpu/zero/vm/globals_zero.hpp	Tue Nov 24 11:49:42 2009 -0800
+++ b/hotspot/src/cpu/zero/vm/globals_zero.hpp	Fri Nov 27 07:56:58 2009 -0800
@@ -36,7 +36,6 @@
 
 define_pd_global(intx,  CodeEntryAlignment,   32);
 define_pd_global(intx,  InlineFrequencyCount, 100);
-define_pd_global(intx,  InlineSmallCode,      1000);
 define_pd_global(intx,  PreInflateSpin,       10);
 
 define_pd_global(intx,  StackYellowPages,     2);

--- a/hotspot/src/cpu/zero/vm/sharedRuntime_zero.cpp	Tue Nov 24 11:49:42 2009 -0800
+++ b/hotspot/src/cpu/zero/vm/sharedRuntime_zero.cpp	Fri Nov 27 07:56:58 2009 -0800
@@ -1,6 +1,6 @@
 /*
  * Copyright 2003-2007 Sun Microsystems, Inc.  All Rights Reserved.
- * Copyright 2007, 2008 Red Hat, Inc.
+ * Copyright 2007, 2008, 2009 Red Hat, Inc.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -61,7 +61,14 @@
                                                 BasicType *in_sig_bt,
                                                 VMRegPair *in_regs,
                                                 BasicType ret_type) {
+#ifdef SHARK
+  return SharkCompiler::compiler()->generate_native_wrapper(masm,
+                                                            method,
+                                                            in_sig_bt,
+                                                            ret_type);
+#else
   ShouldNotCallThis();
+#endif // SHARK
 }
 
 int Deoptimization::last_frame_adjust(int callee_parameters,

--- a/hotspot/src/cpu/zero/vm/sharkFrame_zero.hpp	Tue Nov 24 11:49:42 2009 -0800
+++ b/hotspot/src/cpu/zero/vm/sharkFrame_zero.hpp	Fri Nov 27 07:56:58 2009 -0800
@@ -1,6 +1,6 @@
 /*
  * Copyright 2003-2007 Sun Microsystems, Inc.  All Rights Reserved.
- * Copyright 2008 Red Hat, Inc.
+ * Copyright 2008, 2009 Red Hat, Inc.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -41,7 +41,7 @@
 // |  ...               |
 
 class SharkFrame : public ZeroFrame {
-  friend class SharkFunction;
+  friend class SharkStack;
 
  private:
   SharkFrame() : ZeroFrame() {

--- a/hotspot/src/share/vm/interpreter/bytecodeInterpreter.cpp	Tue Nov 24 11:49:42 2009 -0800
+++ b/hotspot/src/share/vm/interpreter/bytecodeInterpreter.cpp	Fri Nov 27 07:56:58 2009 -0800
@@ -281,7 +281,7 @@
 
 #define DO_BACKEDGE_CHECKS(skip, branch_pc)                                                         \
     if ((skip) <= 0) {                                                                              \
-      if (UseCompiler && UseLoopCounter) {                                                          \
+      if (UseLoopCounter) {                                                                         \
         bool do_OSR = UseOnStackReplacement;                                                        \
         BACKEDGE_COUNT->increment();                                                                \
         if (do_OSR) do_OSR = BACKEDGE_COUNT->reached_InvocationLimit();                             \
@@ -289,16 +289,12 @@
           nmethod*  osr_nmethod;                                                                    \
           OSR_REQUEST(osr_nmethod, branch_pc);                                                      \
           if (osr_nmethod != NULL && osr_nmethod->osr_entry_bci() != InvalidOSREntryBci) {          \
-            intptr_t* buf;                                                                          \
-            CALL_VM(buf=SharedRuntime::OSR_migration_begin(THREAD), handle_exception);              \
+            intptr_t* buf = SharedRuntime::OSR_migration_begin(THREAD);                             \
             istate->set_msg(do_osr);                                                                \
             istate->set_osr_buf((address)buf);                                                      \
             istate->set_osr_entry(osr_nmethod->osr_entry());                                        \
             return;                                                                                 \
           }                                                                                         \
-        } else {                                                                                    \
-          INCR_INVOCATION_COUNT;                                                                    \
-          SAFEPOINT;                                                                                \
         }                                                                                           \
       }  /* UseCompiler ... */                                                                      \
       INCR_INVOCATION_COUNT;                                                                        \
@@ -1281,12 +1277,7 @@
           jfloat f;
           jdouble r;
           f = STACK_FLOAT(-1);
-#ifdef IA64
-          // IA64 gcc bug
-          r = ( f == 0.0f ) ? (jdouble) f : (jdouble) f + ia64_double_zero;
-#else
           r = (jdouble) f;
-#endif
           MORE_STACK(-1); // POP
           SET_STACK_DOUBLE(r, 1);
           UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2);

--- a/hotspot/src/share/vm/prims/jni.cpp	Tue Nov 24 11:49:42 2009 -0800
+++ b/hotspot/src/share/vm/prims/jni.cpp	Fri Nov 27 07:56:58 2009 -0800
@@ -3231,6 +3231,21 @@
   jint result = JNI_ERR;
   DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result);
 
+  // We're about to use Atomic::xchg for synchronization.  Some Zero
+  // platforms use the GCC builtin __sync_lock_test_and_set for this,
+  // but __sync_lock_test_and_set is not guaranteed to do what we want
+  // on all architectures.  So we check it works before relying on it.
+#if defined(ZERO) && defined(ASSERT)
+  {
+    jint a = 0xcafebabe;
+    jint b = Atomic::xchg(0xdeadbeef, &a);
+    void *c = &a;
+    void *d = Atomic::xchg_ptr(&b, &c);
+    assert(a == 0xdeadbeef && b == (jint) 0xcafebabe, "Atomic::xchg() works");
+    assert(c == &b && d == &a, "Atomic::xchg_ptr() works");
+  }
+#endif // ZERO && ASSERT
+
   // At the moment it's only possible to have one Java VM,
   // since some of the runtime state is in global variables.
 

--- a/hotspot/src/share/vm/prims/jvmtiManageCapabilities.cpp	Tue Nov 24 11:49:42 2009 -0800
+++ b/hotspot/src/share/vm/prims/jvmtiManageCapabilities.cpp	Fri Nov 27 07:56:58 2009 -0800
@@ -115,8 +115,10 @@
   jvmtiCapabilities jc;
 
   memset(&jc, 0, sizeof(jc));
+#ifndef CC_INTERP
   jc.can_pop_frame = 1;
   jc.can_force_early_return = 1;
+#endif // !CC_INTERP
   jc.can_get_source_debug_extension = 1;
   jc.can_access_local_variables = 1;
   jc.can_maintain_original_method_order = 1;

--- a/hotspot/src/share/vm/runtime/os.hpp	Tue Nov 24 11:49:42 2009 -0800
+++ b/hotspot/src/share/vm/runtime/os.hpp	Fri Nov 27 07:56:58 2009 -0800
@@ -294,19 +294,16 @@
   }
 
   static bool    is_memory_serialize_page(JavaThread *thread, address addr) {
-    address thr_addr;
     if (UseMembar) return false;
-    // Calculate thread specific address
+    // Previously this function calculated the exact address of this
+    // thread's serialize page, and checked if the faulting address
+    // was equal.  However, some platforms mask off faulting addresses
+    // to the page size, so now we just check that the address is
+    // within the page.  This makes the thread argument unnecessary,
+    // but we retain the NULL check to preserve existing behaviour.
     if (thread == NULL) return false;
-    // TODO-FIXME: some platforms mask off faulting addresses to the base pagesize.
-    // Instead of using a test for equality we should probably use something
-    // of the form:
-    // return ((_mem_serialize_page ^ addr) & -pagesize) == 0
-    //
-    thr_addr  = (address)(((uintptr_t)thread >>
-                get_serialize_page_shift_count()) &
-                get_serialize_page_mask()) + (uintptr_t)_mem_serialize_page;
-    return  (thr_addr == addr);
+    address page = (address) _mem_serialize_page;
+    return addr >= page && addr < (page + os::vm_page_size());
   }
 
   static void block_on_serialize_page_trap();