/*

 * Copyright 1997-2009 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

 * CA 95054 USA or visit www.sun.com if you need additional information or

 * have any questions.

 *

 */

// The InterpreterRuntime is called by the interpreter for everything

// that cannot/should not be dealt with in assembly and needs C support.

class InterpreterRuntime: AllStatic {

  friend class BytecodeClosure; // for method and bcp

  friend class PrintingClosure; // for method and bcp

 private:

  // Helper functions to access current interpreter state

  static frame     last_frame(JavaThread *thread)    { return thread->last_frame(); }

  static methodOop method(JavaThread *thread)        { return last_frame(thread).interpreter_frame_method(); }

  static address   bcp(JavaThread *thread)           { return last_frame(thread).interpreter_frame_bcp(); }

  static void      set_bcp_and_mdp(address bcp, JavaThread*thread);

  static Bytecodes::Code code(JavaThread *thread)    {

    // pass method to avoid calling unsafe bcp_to_method (partial fix 4926272)

    return Bytecodes::code_at(bcp(thread), method(thread));

  }

  static bool      already_resolved(JavaThread *thread) { return cache_entry(thread)->is_resolved(code(thread)); }

  static int       one_byte_index(JavaThread *thread)   { return bcp(thread)[1]; }

  static int       two_byte_index(JavaThread *thread)   { return Bytes::get_Java_u2(bcp(thread) + 1); }

  static int       number_of_dimensions(JavaThread *thread)  { return bcp(thread)[3]; }

  static void      note_trap(JavaThread *thread, int reason, TRAPS);

 public:

  // Constants

  static void    ldc           (JavaThread* thread, bool wide);

  // Allocation

  static void    _new          (JavaThread* thread, constantPoolOopDesc* pool, int index);

  static void    newarray      (JavaThread* thread, BasicType type, jint size);

  static void    anewarray     (JavaThread* thread, constantPoolOopDesc* pool, int index, jint size);

  static void    multianewarray(JavaThread* thread, jint* first_size_address);

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

  // Quicken instance-of and check-cast bytecodes

  static void    quicken_io_cc(JavaThread* thread);

  // Exceptions thrown by the interpreter

  static void    throw_AbstractMethodError(JavaThread* thread);

  static void    throw_IncompatibleClassChangeError(JavaThread* thread);

  static void    throw_StackOverflowError(JavaThread* thread);

  static void    throw_ArrayIndexOutOfBoundsException(JavaThread* thread, char* name, jint index);

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

  static void    throw_WrongMethodTypeException(JavaThread* thread, oopDesc* mtype = NULL, oopDesc* mhandle = NULL);

  static void    create_exception(JavaThread* thread, char* name, char* message);

  static void    create_klass_exception(JavaThread* thread, char* name, oopDesc* obj);

  static address exception_handler_for_exception(JavaThread* thread, oopDesc* exception);

  static void    throw_pending_exception(JavaThread* thread);

  // Statics & fields

  static void    resolve_get_put(JavaThread* thread, Bytecodes::Code bytecode);

  // Synchronization

  static void    monitorenter(JavaThread* thread, BasicObjectLock* elem);

  static void    monitorexit (JavaThread* thread, BasicObjectLock* elem);

  static void    throw_illegal_monitor_state_exception(JavaThread* thread);

  static void    new_illegal_monitor_state_exception(JavaThread* thread);

  // Calls

  // Breakpoints

  static void _breakpoint(JavaThread* thread, methodOopDesc* method, address bcp);

  static Bytecodes::Code get_original_bytecode_at(JavaThread* thread, methodOopDesc* method, address bcp);

  static void            set_original_bytecode_at(JavaThread* thread, methodOopDesc* method, address bcp, Bytecodes::Code new_code);

  static bool is_breakpoint(JavaThread *thread) { return Bytecodes::code_or_bp_at(bcp(thread)) == Bytecodes::_breakpoint; }

  // Safepoints

  static void    at_safepoint(JavaThread* thread);

  // Debugger support

  static void post_field_access(JavaThread *thread, oopDesc* obj,

    ConstantPoolCacheEntry *cp_entry);

  static void post_field_modification(JavaThread *thread, oopDesc* obj,

    ConstantPoolCacheEntry *cp_entry, jvalue *value);

  static void post_method_entry(JavaThread *thread);

  static void post_method_exit (JavaThread *thread);

  static int  interpreter_contains(address pc);

  // Native signature handlers

  static void prepare_native_call(JavaThread* thread, methodOopDesc* method);

  static address slow_signature_handler(JavaThread* thread,

                                        methodOopDesc* method,

                                        intptr_t* from, intptr_t* to);

#if defined(IA32) || defined(AMD64)

  // Popframe support (only needed on x86 and AMD64)

  static void popframe_move_outgoing_args(JavaThread* thread, void* src_address, void* dest_address);

#endif

  // Platform dependent stuff

  #include "incls/_interpreterRT_pd.hpp.incl"

  // Interpreter's frequency counter overflow

  static nmethod* frequency_counter_overflow(JavaThread* thread, address branch_bcp);

  // Interpreter profiling support

  static jint    bcp_to_di(methodOopDesc* method, address cur_bcp);

  static jint    profile_method(JavaThread* thread, address cur_bcp);

  static void    update_mdp_for_ret(JavaThread* thread, int bci);

#ifdef ASSERT

  static void    verify_mdp(methodOopDesc* method, address bcp, address mdp);

#endif // ASSERT

};

class SignatureHandlerLibrary: public AllStatic {

 public:

  enum { buffer_size =  1*K }; // the size of the temporary code buffer

  enum { blob_size   = 32*K }; // the size of a handler code blob.

 private:

  static BufferBlob*              _handler_blob; // the current buffer blob containing the generated handlers

  static address                  _handler;      // next available address within _handler_blob;

  static GrowableArray<uint64_t>* _fingerprints; // the fingerprint collection

  static GrowableArray<address>*  _handlers;     // the corresponding handlers

  static address                  _buffer;       // the temporary code buffer

  static address set_handler_blob();

  static void initialize();

  static address set_handler(CodeBuffer* buffer);

  static void pd_set_handler(address handler);

 public:

  static void add(methodHandle method);

};