--- old/src/share/vm/prims/whitebox.cpp	2014-01-29 18:56:02.823513311 +0400
+++ new/src/share/vm/prims/whitebox.cpp	2014-01-29 18:56:02.711513316 +0400
@@ -33,9 +33,11 @@
 #include "prims/whitebox.hpp"
 #include "prims/wbtestmethods/parserTests.hpp"
 
+#include "runtime/thread.hpp"
 #include "runtime/arguments.hpp"
 #include "runtime/interfaceSupport.hpp"
 #include "runtime/os.hpp"
+
 #include "utilities/debug.hpp"
 #include "utilities/macros.hpp"
 #include "utilities/exceptions.hpp"
@@ -489,6 +491,15 @@
   c = *p;
 WB_END
 
+WB_ENTRY(jlong, WB_GetThreadFullStackSize(JNIEnv* env, jobject o))
+  return (jlong) Thread::current()->stack_size();
+WB_END
+
+WB_ENTRY(jlong, WB_GetThreadRemainingStackSize(JNIEnv* env, jobject o))
+  JavaThread* t = JavaThread::current();
+  return (jlong) ( (ptrdiff_t) t->stack_available(os::current_stack_pointer()) - StackShadowPages * os::vm_page_size() );
+WB_END
+
 //Some convenience methods to deal with objects from java
 int WhiteBox::offset_for_field(const char* field_name, oop object,
     Symbol* signature_symbol) {
@@ -600,6 +611,8 @@
   {CC"isInStringTable",   CC"(Ljava/lang/String;)Z",  (void*)&WB_IsInStringTable  },
   {CC"fullGC",   CC"()V",                             (void*)&WB_FullGC },
   {CC"readReservedMemory", CC"()V",                   (void*)&WB_ReadReservedMemory },
+  {CC"getThreadFullStackSize", CC"()J",               (void*)&WB_GetThreadFullStackSize },
+  {CC"getThreadRemainingStackSize", CC"()J",          (void*)&WB_GetThreadRemainingStackSize },
 };
 
 #undef CC