--- a/hotspot/src/share/vm/compiler/compileBroker.hpp	Fri Jan 29 08:33:24 2010 -0800
+++ b/hotspot/src/share/vm/compiler/compileBroker.hpp	Fri Jan 29 09:27:22 2010 -0800
@@ -193,6 +193,9 @@
   static bool _initialized;
   static volatile bool _should_block;
 
+  // This flag can be used to stop compilation or turn it back on
+  static volatile jint _should_compile_new_jobs;
+
   // The installed compiler(s)
   static AbstractCompiler* _compilers[2];
 
@@ -319,6 +322,7 @@
 
   static void compiler_thread_loop();
 
+  static uint get_compilation_id() { return _compilation_id; }
   static bool is_idle();
 
   // Set _should_block.
@@ -328,6 +332,20 @@
   // Call this from the compiler at convenient points, to poll for _should_block.
   static void maybe_block();
 
+  enum {
+    // Flags for toggling compiler activity
+    stop_compilation = 0,
+    run_compilation  = 1
+  };
+
+  static bool should_compile_new_jobs() { return UseCompiler && (_should_compile_new_jobs == run_compilation); }
+  static bool set_should_compile_new_jobs(jint new_state) {
+    // Return success if the current caller set it
+    jint old = Atomic::cmpxchg(new_state, &_should_compile_new_jobs, 1-new_state);
+    return (old == (1-new_state));
+  }
+  static void handle_full_code_cache();
+
   // Return total compilation ticks
   static jlong total_compilation_ticks() {
     return _perf_total_compilation != NULL ? _perf_total_compilation->get_value() : 0;