jdk8-mips64-public/hotspot: src/share/vm/runtime/compilationPolicy.hpp@da91efe96a93 (annotated)

src/share/vm/runtime/compilationPolicy.hpp@da91efe96a93 (annotated)

src/share/vm/runtime/compilationPolicy.hpp

Sat, 01 Sep 2012 13:25:18 -0400

author: coleenp
date: Sat, 01 Sep 2012 13:25:18 -0400
changeset 4037: da91efe96a93
parent 3900: d2a62e0f25eb
child 4908: b84fd7d73702
permissions: -rw-r--r--

6964458: Reimplement class meta-data storage to use native memory
Summary: Remove PermGen, allocate meta-data in metaspace linked to class loaders, rewrite GC walking, rewrite and rename metadata to be C++ classes
Reviewed-by: jmasa, stefank, never, coleenp, kvn, brutisso, mgerdin, dholmes, jrose, twisti, roland
Contributed-by: jmasa <jon.masamitsu@oracle.com>, stefank <stefan.karlsson@oracle.com>, mgerdin <mikael.gerdin@oracle.com>, never <tom.rodriguez@oracle.com>

 /*
  * Copyright (c) 2000, 2012, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  *
  */
 #ifndef SHARE_VM_RUNTIME_COMPILATIONPOLICY_HPP
 #define SHARE_VM_RUNTIME_COMPILATIONPOLICY_HPP
 #include "code/nmethod.hpp"
 #include "compiler/compileBroker.hpp"
 #include "memory/allocation.hpp"
 #include "runtime/vm_operations.hpp"
 #include "utilities/growableArray.hpp"
 // The CompilationPolicy selects which method (if any) should be compiled.
 // It also decides which methods must always be compiled (i.e., are never
 // interpreted).
 class CompileTask;
 class CompileQueue;
 class CompilationPolicy : public CHeapObj<mtCompiler> {
   static CompilationPolicy* _policy;
   // Accumulated time
   static elapsedTimer       _accumulated_time;
   static bool               _in_vm_startup;
 public:
   static  void set_in_vm_startup(bool in_vm_startup) { _in_vm_startup = in_vm_startup; }
   static  void completed_vm_startup();
   static  bool delay_compilation_during_startup()    { return _in_vm_startup; }
   // m must be compiled before executing it
   static bool must_be_compiled(methodHandle m, int comp_level = CompLevel_all);
   // m is allowed to be compiled
   static bool can_be_compiled(methodHandle m, int comp_level = CompLevel_all);
   static bool is_compilation_enabled();
   static void set_policy(CompilationPolicy* policy) { _policy = policy; }
   static CompilationPolicy* policy()                { return _policy; }
   // Profiling
   elapsedTimer* accumulated_time() { return &_accumulated_time; }
   void print_time() PRODUCT_RETURN;
   // Return initial compile level that is used with Xcomp
   virtual CompLevel initial_compile_level() = 0;
   virtual int compiler_count(CompLevel comp_level) = 0;
   // main notification entry, return a pointer to an nmethod if the OSR is required,
   // returns NULL otherwise.
   virtual nmethod* event(methodHandle method, methodHandle inlinee, int branch_bci, int bci, CompLevel comp_level, nmethod* nm, JavaThread* thread) = 0;
   // safepoint() is called at the end of the safepoint
   virtual void do_safepoint_work() = 0;
   // reprofile request
   virtual void reprofile(ScopeDesc* trap_scope, bool is_osr) = 0;
   // delay_compilation(method) can be called by any component of the runtime to notify the policy
   // that it's recommended to delay the complation of this method.
   virtual void delay_compilation(Method* method) = 0;
   // disable_compilation() is called whenever the runtime decides to disable compilation of the
   // specified method.
   virtual void disable_compilation(Method* method) = 0;
   // Select task is called by CompileBroker. The queue is guaranteed to have at least one
   // element and is locked. The function should select one and return it.
   virtual CompileTask* select_task(CompileQueue* compile_queue) = 0;
   // Tell the runtime if we think a given method is adequately profiled.
   virtual bool is_mature(Method* method) = 0;
   // Do policy initialization
   virtual void initialize() = 0;
   virtual bool should_not_inline(ciEnv* env, ciMethod* method) { return false; }
 };
 // A base class for baseline policies.
 class NonTieredCompPolicy : public CompilationPolicy {
   int _compiler_count;
 protected:
   static void trace_frequency_counter_overflow(methodHandle m, int branch_bci, int bci);
   static void trace_osr_request(methodHandle method, nmethod* osr, int bci);
   static void trace_osr_completion(nmethod* osr_nm);
   void reset_counter_for_invocation_event(methodHandle method);
   void reset_counter_for_back_branch_event(methodHandle method);
 public:
   NonTieredCompPolicy() : _compiler_count(0) { }
   virtual CompLevel initial_compile_level() { return CompLevel_initial_compile; }
   virtual int compiler_count(CompLevel comp_level);
   virtual void do_safepoint_work();
   virtual void reprofile(ScopeDesc* trap_scope, bool is_osr);
   virtual void delay_compilation(Method* method);
   virtual void disable_compilation(Method* method);
   virtual bool is_mature(Method* method);
   virtual void initialize();
   virtual CompileTask* select_task(CompileQueue* compile_queue);
   virtual nmethod* event(methodHandle method, methodHandle inlinee, int branch_bci, int bci, CompLevel comp_level, nmethod* nm, JavaThread* thread);
   virtual void method_invocation_event(methodHandle m, JavaThread* thread) = 0;
   virtual void method_back_branch_event(methodHandle m, int bci, JavaThread* thread) = 0;
 };
 class SimpleCompPolicy : public NonTieredCompPolicy {
  public:
   virtual void method_invocation_event(methodHandle m, JavaThread* thread);
   virtual void method_back_branch_event(methodHandle m, int bci, JavaThread* thread);
 };
 // StackWalkCompPolicy - existing C2 policy
 #ifdef COMPILER2
 class StackWalkCompPolicy : public NonTieredCompPolicy {
  public:
   virtual void method_invocation_event(methodHandle m, JavaThread* thread);
   virtual void method_back_branch_event(methodHandle m, int bci, JavaThread* thread);
  private:
   RFrame* findTopInlinableFrame(GrowableArray<RFrame*>* stack);
   RFrame* senderOf(RFrame* rf, GrowableArray<RFrame*>* stack);
   // the following variables hold values computed by the last inlining decision
   // they are used for performance debugging only (print better messages)
   static const char* _msg;            // reason for not inlining
   static const char* shouldInline   (methodHandle callee, float frequency, int cnt);
   // positive filter: should send be inlined?  returns NULL (--> yes) or rejection msg
   static const char* shouldNotInline(methodHandle callee);
   // negative filter: should send NOT be inlined?  returns NULL (--> inline) or rejection msg
 };
 #endif
 #endif // SHARE_VM_RUNTIME_COMPILATIONPOLICY_HPP

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/runtime/compilationPolicy.hpp@da91efe96a93 (annotated)

src/share/vm/runtime/compilationPolicy.hpp