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Java example source code file (runtime.hpp)

This example Java source code file (runtime.hpp) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

allstatic, basiclock, biasedlockingcounter, biasedlockingcounters, biasedlockingnamedcounter, cheapobj, countertag, enable_zap_dead_locals, exceptionblob, javathread, namedcounter, notag, share_vm_opto_runtime_hpp, typefunc

The runtime.hpp Java example source code

/*
 * Copyright (c) 1998, 2013, 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_OPTO_RUNTIME_HPP
#define SHARE_VM_OPTO_RUNTIME_HPP

#include "code/codeBlob.hpp"
#include "opto/machnode.hpp"
#include "opto/type.hpp"
#include "runtime/biasedLocking.hpp"
#include "runtime/deoptimization.hpp"
#include "runtime/vframe.hpp"

//------------------------------OptoRuntime------------------------------------
// Opto compiler runtime routines
//
// These are all generated from Ideal graphs.  They are called with the
// Java calling convention.  Internally they call C++.  They are made once at
// startup time and Opto compiles calls to them later.
// Things are broken up into quads: the signature they will be called with,
// the address of the generated code, the corresponding C++ code and an
// nmethod.

// The signature (returned by "xxx_Type()") is used at startup time by the
// Generator to make the generated code "xxx_Java".  Opto compiles calls
// to the generated code "xxx_Java".  When the compiled code gets executed,
// it calls the C++ code "xxx_C".  The generated nmethod is saved in the
// CodeCache.  Exception handlers use the nmethod to get the callee-save
// register OopMaps.
class CallInfo;

//
// NamedCounters are tagged counters which can be used for profiling
// code in various ways.  Currently they are used by the lock coarsening code
//

class NamedCounter : public CHeapObj<mtCompiler> {
public:
    enum CounterTag {
    NoTag,
    LockCounter,
    EliminatedLockCounter,
    BiasedLockingCounter
  };

private:
  const char *  _name;
  int           _count;
  CounterTag    _tag;
  NamedCounter* _next;

 public:
  NamedCounter(const char *n, CounterTag tag = NoTag):
    _name(n),
    _count(0),
    _next(NULL),
    _tag(tag) {}

  const char * name() const     { return _name; }
  int count() const             { return _count; }
  address addr()                { return (address)&_count; }
  CounterTag tag() const        { return _tag; }
  void set_tag(CounterTag tag)  { _tag = tag; }

  NamedCounter* next() const    { return _next; }
  void set_next(NamedCounter* next) {
    assert(_next == NULL, "already set");
    _next = next;
  }

};

class BiasedLockingNamedCounter : public NamedCounter {
 private:
  BiasedLockingCounters _counters;

 public:
  BiasedLockingNamedCounter(const char *n) :
    NamedCounter(n, BiasedLockingCounter), _counters() {}

  BiasedLockingCounters* counters() { return &_counters; }
};

typedef const TypeFunc*(*TypeFunc_generator)();

class OptoRuntime : public AllStatic {
  friend class Matcher;  // allow access to stub names

 private:
  // define stubs
  static address generate_stub(ciEnv* ci_env, TypeFunc_generator gen, address C_function, const char *name, int is_fancy_jump, bool pass_tls, bool save_arguments, bool return_pc);

  // References to generated stubs
  static address _new_instance_Java;
  static address _new_array_Java;
  static address _new_array_nozero_Java;
  static address _multianewarray2_Java;
  static address _multianewarray3_Java;
  static address _multianewarray4_Java;
  static address _multianewarray5_Java;
  static address _multianewarrayN_Java;
  static address _g1_wb_pre_Java;
  static address _g1_wb_post_Java;
  static address _vtable_must_compile_Java;
  static address _complete_monitor_locking_Java;
  static address _rethrow_Java;

  static address _slow_arraycopy_Java;
  static address _register_finalizer_Java;

# ifdef ENABLE_ZAP_DEAD_LOCALS
  static address _zap_dead_Java_locals_Java;
  static address _zap_dead_native_locals_Java;
# endif


  //
  // Implementation of runtime methods
  // =================================

  // Allocate storage for a Java instance.
  static void new_instance_C(Klass* instance_klass, JavaThread *thread);

  // Allocate storage for a objArray or typeArray
  static void new_array_C(Klass* array_klass, int len, JavaThread *thread);
  static void new_array_nozero_C(Klass* array_klass, int len, JavaThread *thread);

  // Post-slow-path-allocation, pre-initializing-stores step for
  // implementing ReduceInitialCardMarks
  static void new_store_pre_barrier(JavaThread* thread);

  // Allocate storage for a multi-dimensional arrays
  // Note: needs to be fixed for arbitrary number of dimensions
  static void multianewarray2_C(Klass* klass, int len1, int len2, JavaThread *thread);
  static void multianewarray3_C(Klass* klass, int len1, int len2, int len3, JavaThread *thread);
  static void multianewarray4_C(Klass* klass, int len1, int len2, int len3, int len4, JavaThread *thread);
  static void multianewarray5_C(Klass* klass, int len1, int len2, int len3, int len4, int len5, JavaThread *thread);
  static void multianewarrayN_C(Klass* klass, arrayOopDesc* dims, JavaThread *thread);
  static void g1_wb_pre_C(oopDesc* orig, JavaThread* thread);
  static void g1_wb_post_C(void* card_addr, JavaThread* thread);

public:
  // Slow-path Locking and Unlocking
  static void complete_monitor_locking_C(oopDesc* obj, BasicLock* lock, JavaThread* thread);
  static void complete_monitor_unlocking_C(oopDesc* obj, BasicLock* lock);

private:

  // Implicit exception support
  static void throw_null_exception_C(JavaThread* thread);

  // Exception handling
  static address handle_exception_C       (JavaThread* thread);
  static address handle_exception_C_helper(JavaThread* thread, nmethod*& nm);
  static address rethrow_C                (oopDesc* exception, JavaThread *thread, address return_pc );
  static void deoptimize_caller_frame     (JavaThread *thread);
  static void deoptimize_caller_frame     (JavaThread *thread, bool doit);
  static bool is_deoptimized_caller_frame (JavaThread *thread);

  // CodeBlob support
  // ===================================================================

  static ExceptionBlob*       _exception_blob;
  static void generate_exception_blob();

  static void register_finalizer(oopDesc* obj, JavaThread* thread);

  // zaping dead locals, either from Java frames or from native frames
# ifdef ENABLE_ZAP_DEAD_LOCALS
  static void zap_dead_Java_locals_C(   JavaThread* thread);
  static void zap_dead_native_locals_C( JavaThread* thread);

  static void zap_dead_java_or_native_locals( JavaThread*, bool (*)(frame*));

 public:
   static int ZapDeadCompiledLocals_count;

# endif


 public:

  static bool is_callee_saved_register(MachRegisterNumbers reg);

  // One time only generate runtime code stubs. Returns true
  // when runtime stubs have been generated successfully and
  // false otherwise.
  static bool generate(ciEnv* env);

  // Returns the name of a stub
  static const char* stub_name(address entry);

  // access to runtime stubs entry points for java code
  static address new_instance_Java()                     { return _new_instance_Java; }
  static address new_array_Java()                        { return _new_array_Java; }
  static address new_array_nozero_Java()                 { return _new_array_nozero_Java; }
  static address multianewarray2_Java()                  { return _multianewarray2_Java; }
  static address multianewarray3_Java()                  { return _multianewarray3_Java; }
  static address multianewarray4_Java()                  { return _multianewarray4_Java; }
  static address multianewarray5_Java()                  { return _multianewarray5_Java; }
  static address multianewarrayN_Java()                  { return _multianewarrayN_Java; }
  static address g1_wb_pre_Java()                        { return _g1_wb_pre_Java; }
  static address g1_wb_post_Java()                       { return _g1_wb_post_Java; }
  static address vtable_must_compile_stub()              { return _vtable_must_compile_Java; }
  static address complete_monitor_locking_Java()         { return _complete_monitor_locking_Java;   }

  static address slow_arraycopy_Java()                   { return _slow_arraycopy_Java; }
  static address register_finalizer_Java()               { return _register_finalizer_Java; }


# ifdef ENABLE_ZAP_DEAD_LOCALS
  static address zap_dead_locals_stub(bool is_native)    { return is_native
                                                                  ? _zap_dead_native_locals_Java
                                                                  : _zap_dead_Java_locals_Java; }
  static MachNode* node_to_call_zap_dead_locals(Node* n, int block_num, bool is_native);
# endif

  static ExceptionBlob*    exception_blob()                      { return _exception_blob; }

  // Leaf routines helping with method data update
  static void profile_receiver_type_C(DataLayout* data, oopDesc* receiver);

  // Implicit exception support
  static void throw_div0_exception_C      (JavaThread* thread);
  static void throw_stack_overflow_error_C(JavaThread* thread);

  // Exception handling
  static address rethrow_stub()             { return _rethrow_Java; }


  // Type functions
  // ======================================================

  static const TypeFunc* new_instance_Type(); // object allocation (slow case)
  static const TypeFunc* new_array_Type ();   // [a]newarray (slow case)
  static const TypeFunc* multianewarray_Type(int ndim); // multianewarray
  static const TypeFunc* multianewarray2_Type(); // multianewarray
  static const TypeFunc* multianewarray3_Type(); // multianewarray
  static const TypeFunc* multianewarray4_Type(); // multianewarray
  static const TypeFunc* multianewarray5_Type(); // multianewarray
  static const TypeFunc* multianewarrayN_Type(); // multianewarray
  static const TypeFunc* g1_wb_pre_Type();
  static const TypeFunc* g1_wb_post_Type();
  static const TypeFunc* complete_monitor_enter_Type();
  static const TypeFunc* complete_monitor_exit_Type();
  static const TypeFunc* uncommon_trap_Type();
  static const TypeFunc* athrow_Type();
  static const TypeFunc* rethrow_Type();
  static const TypeFunc* Math_D_D_Type();  // sin,cos & friends
  static const TypeFunc* Math_DD_D_Type(); // mod,pow & friends
  static const TypeFunc* modf_Type();
  static const TypeFunc* l2f_Type();
  static const TypeFunc* void_long_Type();

  static const TypeFunc* flush_windows_Type();

  // arraycopy routine types
  static const TypeFunc* fast_arraycopy_Type(); // bit-blasters
  static const TypeFunc* checkcast_arraycopy_Type();
  static const TypeFunc* generic_arraycopy_Type();
  static const TypeFunc* slow_arraycopy_Type();   // the full routine

  static const TypeFunc* array_fill_Type();

  static const TypeFunc* aescrypt_block_Type();
  static const TypeFunc* cipherBlockChaining_aescrypt_Type();

  static const TypeFunc* updateBytesCRC32_Type();

  // leaf on stack replacement interpreter accessor types
  static const TypeFunc* osr_end_Type();

  // leaf methodData routine types
  static const TypeFunc* profile_receiver_type_Type();

  // leaf on stack replacement interpreter accessor types
  static const TypeFunc* fetch_int_Type();
  static const TypeFunc* fetch_long_Type();
  static const TypeFunc* fetch_float_Type();
  static const TypeFunc* fetch_double_Type();
  static const TypeFunc* fetch_oop_Type();
  static const TypeFunc* fetch_monitor_Type();

  static const TypeFunc* register_finalizer_Type();

  // Dtrace support
  static const TypeFunc* dtrace_method_entry_exit_Type();
  static const TypeFunc* dtrace_object_alloc_Type();

# ifdef ENABLE_ZAP_DEAD_LOCALS
  static const TypeFunc* zap_dead_locals_Type();
# endif

 private:
 static NamedCounter * volatile _named_counters;

 public:
 // helper function which creates a named counter labeled with the
 // if they are available
 static NamedCounter* new_named_counter(JVMState* jvms, NamedCounter::CounterTag tag);

 // dumps all the named counters
 static void          print_named_counters();

};

#endif // SHARE_VM_OPTO_RUNTIME_HPP

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