--- old/src/cpu/zero/vm/stack_zero.cpp	2015-02-24 17:14:33.794605237 +0100
+++ new/src/cpu/zero/vm/stack_zero.cpp	2015-02-24 17:14:33.743606062 +0100
@@ -30,7 +30,9 @@
 
 int ZeroStack::suggest_size(Thread *thread) const {
   assert(needs_setup(), "already set up");
-  return align_size_down(abi_stack_available(thread) / 2, wordSize);
+  int abi_available = abi_stack_available(thread);
+  assert(abi_available >= 0, "available abi stack must be >= 0");
+  return align_size_down(abi_available / 2, wordSize);
 }
 
 void ZeroStack::handle_overflow(TRAPS) {
--- old/src/cpu/zero/vm/stack_zero.inline.hpp	2015-02-24 17:14:35.608575907 +0100
+++ new/src/cpu/zero/vm/stack_zero.inline.hpp	2015-02-24 17:14:35.557576732 +0100
@@ -48,9 +48,11 @@
 // to use under normal circumstances.  Note that the returned
 // value can be negative.
 inline int ZeroStack::abi_stack_available(Thread *thread) const {
-  int stack_used = thread->stack_base() - (address) &stack_used;
+  guarantee(Thread::current() == thread, "should run in the same thread");
+  int stack_used = thread->stack_base() - (address) &stack_used
+    + (StackYellowPages+StackRedPages+StackShadowPages) * os::vm_page_size();
   int stack_free = thread->stack_size() - stack_used;
-  return stack_free - shadow_pages_size();
+  return stack_free;
 }
 
 #endif // CPU_ZERO_VM_STACK_ZERO_INLINE_HPP
--- old/src/os_cpu/bsd_zero/vm/atomic_bsd_zero.inline.hpp	2015-02-24 17:14:36.562560482 +0100
+++ new/src/os_cpu/bsd_zero/vm/atomic_bsd_zero.inline.hpp	2015-02-24 17:14:36.510561323 +0100
@@ -238,7 +238,13 @@
   // operation.  Note that some platforms only support this with the
   // limitation that the only valid value to store is the immediate
   // constant 1.  There is a test for this in JNI_CreateJavaVM().
-  return __sync_lock_test_and_set (dest, exchange_value);
+  jint result = __sync_lock_test_and_set (dest, exchange_value);
+  // All atomic operations are expected to be full memory barriers
+  // (see atomic.hpp). However, __sync_lock_test_and_set is not
+  // a full memory barrier, but an acquire barrier. Hence, this added
+  // barrier.
+  __sync_synchronize();
+  return result;
 #endif // M68K
 #endif // ARM
 }
@@ -251,7 +257,9 @@
 #ifdef M68K
   return m68k_lock_test_and_set(dest, exchange_value);
 #else
-  return __sync_lock_test_and_set (dest, exchange_value);
+  intptr_t result = __sync_lock_test_and_set (dest, exchange_value);
+  __sync_synchronize();
+  return result;
 #endif // M68K
 #endif // ARM
 }
--- old/src/os_cpu/linux_zero/vm/atomic_linux_zero.inline.hpp	2015-02-24 17:14:37.348547774 +0100
+++ new/src/os_cpu/linux_zero/vm/atomic_linux_zero.inline.hpp	2015-02-24 17:14:37.297548599 +0100
@@ -232,7 +232,13 @@
   // operation.  Note that some platforms only support this with the
   // limitation that the only valid value to store is the immediate
   // constant 1.  There is a test for this in JNI_CreateJavaVM().
-  return __sync_lock_test_and_set (dest, exchange_value);
+  jint result = __sync_lock_test_and_set (dest, exchange_value);
+  // All atomic operations are expected to be full memory barriers
+  // (see atomic.hpp). However, __sync_lock_test_and_set is not
+  // a full memory barrier, but an acquire barrier. Hence, this added
+  // barrier.
+  __sync_synchronize();
+  return result;
 #endif // M68K
 #endif // ARM
 }
@@ -245,7 +251,9 @@
 #ifdef M68K
   return m68k_lock_test_and_set(dest, exchange_value);
 #else
-  return __sync_lock_test_and_set (dest, exchange_value);
+  intptr_t result = __sync_lock_test_and_set (dest, exchange_value);
+  __sync_synchronize();
+  return result;
 #endif // M68K
 #endif // ARM
 }
--- old/src/share/vm/interpreter/interpreterRuntime.cpp	2015-02-24 17:14:38.268532899 +0100
+++ new/src/share/vm/interpreter/interpreterRuntime.cpp	2015-02-24 17:14:38.214533772 +0100
@@ -407,7 +407,11 @@
     // during deoptimization so the interpreter needs to skip it when
     // the frame is popped.
     thread->set_do_not_unlock_if_synchronized(true);
+#ifdef CC_INTERP
+    return (address) -1;
+#else
     return Interpreter::remove_activation_entry();
+#endif
   }
 
   // Need to do this check first since when _do_not_unlock_if_synchronized