hotspot/src/share/vm/runtime/sharedRuntime.hpp
author twisti
Tue, 05 Jan 2010 15:21:25 +0100
changeset 4567 7fc02fbe5c7a
parent 2732 3ab85419f523
child 4735 3d4e4ec0df67
permissions -rw-r--r--
6893268: additional dynamic language related optimizations in C2 Summary: C2 needs some additional optimizations to be able to handle MethodHandle invokes and invokedynamic instructions at the best performance. Reviewed-by: kvn, never
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/*
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 * Copyright 1997-2009 Sun Microsystems, Inc.  All Rights Reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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 * CA 95054 USA or visit www.sun.com if you need additional information or
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 * have any questions.
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 *
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 */
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class AdapterHandlerEntry;
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class vframeStream;
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// Runtime is the base class for various runtime interfaces
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// (InterpreterRuntime, CompilerRuntime, etc.). It provides
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// shared functionality such as exception forwarding (C++ to
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// Java exceptions), locking/unlocking mechanisms, statistical
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// information, etc.
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class SharedRuntime: AllStatic {
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 private:
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  static methodHandle resolve_sub_helper(JavaThread *thread,
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                                     bool is_virtual,
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                                     bool is_optimized, TRAPS);
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  // Shared stub locations
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  static RuntimeStub* _wrong_method_blob;
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  static RuntimeStub* _ic_miss_blob;
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  static RuntimeStub* _resolve_opt_virtual_call_blob;
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  static RuntimeStub* _resolve_virtual_call_blob;
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  static RuntimeStub* _resolve_static_call_blob;
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  static SafepointBlob* _polling_page_safepoint_handler_blob;
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  static SafepointBlob* _polling_page_return_handler_blob;
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#ifdef COMPILER2
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  static ExceptionBlob*       _exception_blob;
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  static UncommonTrapBlob*    _uncommon_trap_blob;
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#endif // COMPILER2
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#ifndef PRODUCT
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  // Counters
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  static int     _nof_megamorphic_calls;         // total # of megamorphic calls (through vtable)
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#endif // !PRODUCT
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 public:
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  // max bytes for each dtrace string parameter
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  enum { max_dtrace_string_size = 256 };
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  // The following arithmetic routines are used on platforms that do
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  // not have machine instructions to implement their functionality.
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  // Do not remove these.
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  // long arithmetics
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  static jlong   lmul(jlong y, jlong x);
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  static jlong   ldiv(jlong y, jlong x);
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  static jlong   lrem(jlong y, jlong x);
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  // float and double remainder
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  static jfloat  frem(jfloat  x, jfloat  y);
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  static jdouble drem(jdouble x, jdouble y);
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  // float conversion (needs to set appropriate rounding mode)
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  static jint    f2i (jfloat  x);
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  static jlong   f2l (jfloat  x);
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  static jint    d2i (jdouble x);
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  static jlong   d2l (jdouble x);
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  static jfloat  d2f (jdouble x);
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  static jfloat  l2f (jlong   x);
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  static jdouble l2d (jlong   x);
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  // double trigonometrics and transcendentals
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  static jdouble dsin(jdouble x);
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  static jdouble dcos(jdouble x);
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  static jdouble dtan(jdouble x);
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  static jdouble dlog(jdouble x);
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  static jdouble dlog10(jdouble x);
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  static jdouble dexp(jdouble x);
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  static jdouble dpow(jdouble x, jdouble y);
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  // exception handling across interpreter/compiler boundaries
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  static address raw_exception_handler_for_return_address(address return_address);
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  static address exception_handler_for_return_address(address return_address);
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#ifndef SERIALGC
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  // G1 write barriers
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  static void g1_wb_pre(oopDesc* orig, JavaThread *thread);
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  static void g1_wb_post(void* card_addr, JavaThread* thread);
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#endif // !SERIALGC
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  // exception handling and implicit exceptions
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  static address compute_compiled_exc_handler(nmethod* nm, address ret_pc, Handle& exception,
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                                              bool force_unwind, bool top_frame_only);
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  enum ImplicitExceptionKind {
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    IMPLICIT_NULL,
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    IMPLICIT_DIVIDE_BY_ZERO,
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    STACK_OVERFLOW
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  };
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  static void    throw_AbstractMethodError(JavaThread* thread);
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  static void    throw_IncompatibleClassChangeError(JavaThread* thread);
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  static void    throw_ArithmeticException(JavaThread* thread);
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  static void    throw_NullPointerException(JavaThread* thread);
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  static void    throw_NullPointerException_at_call(JavaThread* thread);
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  static void    throw_StackOverflowError(JavaThread* thread);
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  static address continuation_for_implicit_exception(JavaThread* thread,
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                                                     address faulting_pc,
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                                                     ImplicitExceptionKind exception_kind);
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  // Shared stub locations
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  static address get_poll_stub(address pc);
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  static address get_ic_miss_stub() {
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    assert(_ic_miss_blob!= NULL, "oops");
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    return _ic_miss_blob->instructions_begin();
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  }
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  static address get_handle_wrong_method_stub() {
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    assert(_wrong_method_blob!= NULL, "oops");
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    return _wrong_method_blob->instructions_begin();
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  }
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#ifdef COMPILER2
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  static void generate_uncommon_trap_blob(void);
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  static UncommonTrapBlob* uncommon_trap_blob()                  { return _uncommon_trap_blob; }
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#endif // COMPILER2
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  static address get_resolve_opt_virtual_call_stub(){
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    assert(_resolve_opt_virtual_call_blob != NULL, "oops");
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    return _resolve_opt_virtual_call_blob->instructions_begin();
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  }
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  static address get_resolve_virtual_call_stub() {
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    assert(_resolve_virtual_call_blob != NULL, "oops");
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    return _resolve_virtual_call_blob->instructions_begin();
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  }
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  static address get_resolve_static_call_stub() {
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    assert(_resolve_static_call_blob != NULL, "oops");
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    return _resolve_static_call_blob->instructions_begin();
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  }
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  static SafepointBlob* polling_page_return_handler_blob()     { return _polling_page_return_handler_blob; }
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  static SafepointBlob* polling_page_safepoint_handler_blob()  { return _polling_page_safepoint_handler_blob; }
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  // Counters
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#ifndef PRODUCT
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  static address nof_megamorphic_calls_addr() { return (address)&_nof_megamorphic_calls; }
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#endif // PRODUCT
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  // Helper routine for full-speed JVMTI exception throwing support
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  static void throw_and_post_jvmti_exception(JavaThread *thread, Handle h_exception);
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  static void throw_and_post_jvmti_exception(JavaThread *thread, symbolOop name, const char *message = NULL);
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  // RedefineClasses() tracing support for obsolete method entry
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  static int rc_trace_method_entry(JavaThread* thread, methodOopDesc* m);
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  // To be used as the entry point for unresolved native methods.
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  static address native_method_throw_unsatisfied_link_error_entry();
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  // bytecode tracing is only used by the TraceBytecodes
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  static intptr_t trace_bytecode(JavaThread* thread, intptr_t preserve_this_value, intptr_t tos, intptr_t tos2) PRODUCT_RETURN0;
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  // Used to back off a spin lock that is under heavy contention
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  static void yield_all(JavaThread* thread, int attempts = 0);
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  static oop retrieve_receiver( symbolHandle sig, frame caller );
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  static void register_finalizer(JavaThread* thread, oopDesc* obj);
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  // dtrace notifications
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  static int dtrace_object_alloc(oopDesc* o);
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  static int dtrace_object_alloc_base(Thread* thread, oopDesc* o);
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  static int dtrace_method_entry(JavaThread* thread, methodOopDesc* m);
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  static int dtrace_method_exit(JavaThread* thread, methodOopDesc* m);
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  // Utility method for retrieving the Java thread id, returns 0 if the
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  // thread is not a well formed Java thread.
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  static jlong get_java_tid(Thread* thread);
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  // used by native wrappers to reenable yellow if overflow happened in native code
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  static void reguard_yellow_pages();
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  /**
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   * Fill in the "X cannot be cast to a Y" message for ClassCastException
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   *
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   * @param thr the current thread
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   * @param name the name of the class of the object attempted to be cast
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   * @return the dynamically allocated exception message (must be freed
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   * by the caller using a resource mark)
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   *
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   * BCP must refer to the current 'checkcast' opcode for the frame
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   * on top of the stack.
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   * The caller (or one of it's callers) must use a ResourceMark
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   * in order to correctly free the result.
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   */
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  static char* generate_class_cast_message(JavaThread* thr, const char* name);
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  /**
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   * Fill in the message for a WrongMethodTypeException
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   *
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   * @param thr the current thread
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   * @param mtype (optional) expected method type (or argument class)
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   * @param mhandle (optional) actual method handle (or argument)
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   * @return the dynamically allocated exception message
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   *
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   * BCP for the frame on top of the stack must refer to an
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   * 'invokevirtual' op for a method handle, or an 'invokedyamic' op.
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   * The caller (or one of its callers) must use a ResourceMark
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   * in order to correctly free the result.
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   */
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  static char* generate_wrong_method_type_message(JavaThread* thr,
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                                                  oopDesc* mtype = NULL,
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                                                  oopDesc* mhandle = NULL);
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  /** Return non-null if the mtype is a klass or Class, not a MethodType. */
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  static oop wrong_method_type_is_for_single_argument(JavaThread* thr,
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                                                      oopDesc* mtype);
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  /**
1
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   * Fill in the "X cannot be cast to a Y" message for ClassCastException
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   *
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   * @param name the name of the class of the object attempted to be cast
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   * @param klass the name of the target klass attempt
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   * @param gripe the specific kind of problem being reported
1
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   * @return the dynamically allocated exception message (must be freed
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   * by the caller using a resource mark)
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   *
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   * This version does not require access the frame, so it can be called
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   * from interpreted code
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   * The caller (or one of it's callers) must use a ResourceMark
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   * in order to correctly free the result.
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   */
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  static char* generate_class_cast_message(const char* name, const char* klass,
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                                           const char* gripe = " cannot be cast to ");
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  // Resolves a call site- may patch in the destination of the call into the
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  // compiled code.
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  static methodHandle resolve_helper(JavaThread *thread,
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                                     bool is_virtual,
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                                     bool is_optimized, TRAPS);
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  static void generate_stubs(void);
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  private:
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  // deopt blob
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  static void generate_deopt_blob(void);
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  static DeoptimizationBlob* _deopt_blob;
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  public:
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  static DeoptimizationBlob* deopt_blob(void)      { return _deopt_blob; }
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  // Resets a call-site in compiled code so it will get resolved again.
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  static methodHandle reresolve_call_site(JavaThread *thread, TRAPS);
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  // In the code prolog, if the klass comparison fails, the inline cache
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  // misses and the call site is patched to megamorphic
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  static methodHandle handle_ic_miss_helper(JavaThread* thread, TRAPS);
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  // Find the method that called us.
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  static methodHandle find_callee_method(JavaThread* thread, TRAPS);
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 private:
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  static Handle find_callee_info(JavaThread* thread,
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                                 Bytecodes::Code& bc,
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                                 CallInfo& callinfo, TRAPS);
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  static Handle find_callee_info_helper(JavaThread* thread,
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                                        vframeStream& vfst,
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                                        Bytecodes::Code& bc,
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                                        CallInfo& callinfo, TRAPS);
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  static address clean_virtual_call_entry();
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  static address clean_opt_virtual_call_entry();
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  static address clean_static_call_entry();
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 public:
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  // Read the array of BasicTypes from a Java signature, and compute where
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  // compiled Java code would like to put the results.  Values in reg_lo and
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  // reg_hi refer to 4-byte quantities.  Values less than SharedInfo::stack0 are
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  // registers, those above refer to 4-byte stack slots.  All stack slots are
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  // based off of the window top.  SharedInfo::stack0 refers to the first usable
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  // slot in the bottom of the frame. SharedInfo::stack0+1 refers to the memory word
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  // 4-bytes higher. So for sparc because the register window save area is at
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  // the bottom of the frame the first 16 words will be skipped and SharedInfo::stack0
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  // will be just above it. (
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  // return value is the maximum number of VMReg stack slots the convention will use.
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  static int java_calling_convention(const BasicType *sig_bt, VMRegPair *regs, int total_args_passed, int is_outgoing);
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  // Ditto except for calling C
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  static int c_calling_convention(const BasicType *sig_bt, VMRegPair *regs, int total_args_passed);
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  // Generate I2C and C2I adapters. These adapters are simple argument marshalling
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  // blobs. Unlike adapters in the tiger and earlier releases the code in these
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  // blobs does not create a new frame and are therefore virtually invisible
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  // to the stack walking code. In general these blobs extend the callers stack
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  // as needed for the conversion of argument locations.
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  // When calling a c2i blob the code will always call the interpreter even if
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  // by the time we reach the blob there is compiled code available. This allows
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  // the blob to pass the incoming stack pointer (the sender sp) in a known
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  // location for the interpreter to record. This is used by the frame code
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  // to correct the sender code to match up with the stack pointer when the
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  // thread left the compiled code. In addition it allows the interpreter
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  // to remove the space the c2i adapter allocated to do it argument conversion.
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  // Although a c2i blob will always run interpreted even if compiled code is
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  // present if we see that compiled code is present the compiled call site
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  // will be patched/re-resolved so that later calls will run compiled.
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  // Aditionally a c2i blob need to have a unverified entry because it can be reached
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  // in situations where the call site is an inlined cache site and may go megamorphic.
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  // A i2c adapter is simpler than the c2i adapter. This is because it is assumed
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  // that the interpreter before it does any call dispatch will record the current
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  // stack pointer in the interpreter frame. On return it will restore the stack
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  // pointer as needed. This means the i2c adapter code doesn't need any special
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  // handshaking path with compiled code to keep the stack walking correct.
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  static AdapterHandlerEntry* generate_i2c2i_adapters(MacroAssembler *_masm,
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                                                      int total_args_passed,
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                                                      int max_arg,
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                                                      const BasicType *sig_bt,
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                                                      const VMRegPair *regs);
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  // OSR support
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  // OSR_migration_begin will extract the jvm state from an interpreter
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  // frame (locals, monitors) and store the data in a piece of C heap
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  // storage. This then allows the interpreter frame to be removed from the
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  // stack and the OSR nmethod to be called. That method is called with a
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  // pointer to the C heap storage. This pointer is the return value from
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  // OSR_migration_begin.
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  static intptr_t* OSR_migration_begin( JavaThread *thread);
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  // OSR_migration_end is a trivial routine. It is called after the compiled
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  // method has extracted the jvm state from the C heap that OSR_migration_begin
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  // created. It's entire job is to simply free this storage.
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  static void      OSR_migration_end  ( intptr_t* buf);
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  // Convert a sig into a calling convention register layout
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  // and find interesting things about it.
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  static VMRegPair* find_callee_arguments(symbolOop sig, bool has_receiver, int *arg_size);
1
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  static VMReg     name_for_receiver();
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  // "Top of Stack" slots that may be unused by the calling convention but must
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  // otherwise be preserved.
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  // On Intel these are not necessary and the value can be zero.
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  // On Sparc this describes the words reserved for storing a register window
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  // when an interrupt occurs.
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  static uint out_preserve_stack_slots();
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  // Save and restore a native result
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  static void    save_native_result(MacroAssembler *_masm, BasicType ret_type, int frame_slots );
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  static void restore_native_result(MacroAssembler *_masm, BasicType ret_type, int frame_slots );
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  // Generate a native wrapper for a given method.  The method takes arguments
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   375
  // in the Java compiled code convention, marshals them to the native
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   376
  // convention (handlizes oops, etc), transitions to native, makes the call,
489c9b5090e2 Initial load
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parents:
diff changeset
   377
  // returns to java state (possibly blocking), unhandlizes any result and
489c9b5090e2 Initial load
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diff changeset
   378
  // returns.
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diff changeset
   379
  static nmethod *generate_native_wrapper(MacroAssembler* masm,
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diff changeset
   380
                                          methodHandle method,
489c9b5090e2 Initial load
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diff changeset
   381
                                          int total_args_passed,
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parents:
diff changeset
   382
                                          int max_arg,
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diff changeset
   383
                                          BasicType *sig_bt,
489c9b5090e2 Initial load
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diff changeset
   384
                                          VMRegPair *regs,
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parents:
diff changeset
   385
                                          BasicType ret_type );
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diff changeset
   386
363
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diff changeset
   387
#ifdef HAVE_DTRACE_H
99d43e8a76ad 6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
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parents: 189
diff changeset
   388
  // Generate a dtrace wrapper for a given method.  The method takes arguments
99d43e8a76ad 6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents: 189
diff changeset
   389
  // in the Java compiled code convention, marshals them to the native
99d43e8a76ad 6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents: 189
diff changeset
   390
  // convention (handlizes oops, etc), transitions to native, makes the call,
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kamg
parents: 189
diff changeset
   391
  // returns to java state (possibly blocking), unhandlizes any result and
99d43e8a76ad 6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
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parents: 189
diff changeset
   392
  // returns.
99d43e8a76ad 6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
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diff changeset
   393
  static nmethod *generate_dtrace_nmethod(MacroAssembler* masm,
99d43e8a76ad 6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
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diff changeset
   394
                                          methodHandle method);
99d43e8a76ad 6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
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parents: 189
diff changeset
   395
99d43e8a76ad 6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents: 189
diff changeset
   396
  // dtrace support to convert a Java string to utf8
99d43e8a76ad 6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents: 189
diff changeset
   397
  static void get_utf(oopDesc* src, address dst);
99d43e8a76ad 6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
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diff changeset
   398
#endif // def HAVE_DTRACE_H
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diff changeset
   399
1
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parents:
diff changeset
   400
  // A compiled caller has just called the interpreter, but compiled code
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parents:
diff changeset
   401
  // exists.  Patch the caller so he no longer calls into the interpreter.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   402
  static void fixup_callers_callsite(methodOopDesc* moop, address ret_pc);
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parents:
diff changeset
   403
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parents:
diff changeset
   404
  // Slow-path Locking and Unlocking
489c9b5090e2 Initial load
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parents:
diff changeset
   405
  static void complete_monitor_locking_C(oopDesc* obj, BasicLock* lock, JavaThread* thread);
489c9b5090e2 Initial load
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parents:
diff changeset
   406
  static void complete_monitor_unlocking_C(oopDesc* obj, BasicLock* lock);
489c9b5090e2 Initial load
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parents:
diff changeset
   407
489c9b5090e2 Initial load
duke
parents:
diff changeset
   408
  // Resolving of calls
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parents:
diff changeset
   409
  static address resolve_static_call_C     (JavaThread *thread);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   410
  static address resolve_virtual_call_C    (JavaThread *thread);
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duke
parents:
diff changeset
   411
  static address resolve_opt_virtual_call_C(JavaThread *thread);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   412
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parents:
diff changeset
   413
  // arraycopy, the non-leaf version.  (See StubRoutines for all the leaf calls.)
489c9b5090e2 Initial load
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diff changeset
   414
  static void slow_arraycopy_C(oopDesc* src,  jint src_pos,
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duke
parents:
diff changeset
   415
                               oopDesc* dest, jint dest_pos,
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parents:
diff changeset
   416
                               jint length, JavaThread* thread);
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duke
parents:
diff changeset
   417
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diff changeset
   418
  // handle ic miss with caller being compiled code
489c9b5090e2 Initial load
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parents:
diff changeset
   419
  // wrong method handling (inline cache misses, zombie methods)
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parents:
diff changeset
   420
  static address handle_wrong_method(JavaThread* thread);
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   421
  static address handle_wrong_method_ic_miss(JavaThread* thread);
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   422
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   423
#ifndef PRODUCT
489c9b5090e2 Initial load
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diff changeset
   424
489c9b5090e2 Initial load
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diff changeset
   425
  // Collect and print inline cache miss statistics
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   426
 private:
489c9b5090e2 Initial load
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parents:
diff changeset
   427
  enum { maxICmiss_count = 100 };
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parents:
diff changeset
   428
  static int     _ICmiss_index;                  // length of IC miss histogram
489c9b5090e2 Initial load
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diff changeset
   429
  static int     _ICmiss_count[maxICmiss_count]; // miss counts
489c9b5090e2 Initial load
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diff changeset
   430
  static address _ICmiss_at[maxICmiss_count];    // miss addresses
489c9b5090e2 Initial load
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diff changeset
   431
  static void trace_ic_miss(address at);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   432
489c9b5090e2 Initial load
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   433
 public:
489c9b5090e2 Initial load
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parents:
diff changeset
   434
  static int _monitor_enter_ctr;                 // monitor enter slow
489c9b5090e2 Initial load
duke
parents:
diff changeset
   435
  static int _monitor_exit_ctr;                  // monitor exit slow
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duke
parents:
diff changeset
   436
  static int _throw_null_ctr;                    // throwing a null-pointer exception
489c9b5090e2 Initial load
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parents:
diff changeset
   437
  static int _ic_miss_ctr;                       // total # of IC misses
489c9b5090e2 Initial load
duke
parents:
diff changeset
   438
  static int _wrong_method_ctr;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   439
  static int _resolve_static_ctr;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   440
  static int _resolve_virtual_ctr;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   441
  static int _resolve_opt_virtual_ctr;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   442
  static int _implicit_null_throws;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   443
  static int _implicit_div0_throws;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   444
489c9b5090e2 Initial load
duke
parents:
diff changeset
   445
  static int _jbyte_array_copy_ctr;        // Slow-path byte array copy
489c9b5090e2 Initial load
duke
parents:
diff changeset
   446
  static int _jshort_array_copy_ctr;       // Slow-path short array copy
489c9b5090e2 Initial load
duke
parents:
diff changeset
   447
  static int _jint_array_copy_ctr;         // Slow-path int array copy
489c9b5090e2 Initial load
duke
parents:
diff changeset
   448
  static int _jlong_array_copy_ctr;        // Slow-path long array copy
489c9b5090e2 Initial load
duke
parents:
diff changeset
   449
  static int _oop_array_copy_ctr;          // Slow-path oop array copy
489c9b5090e2 Initial load
duke
parents:
diff changeset
   450
  static int _checkcast_array_copy_ctr;    // Slow-path oop array copy, with cast
489c9b5090e2 Initial load
duke
parents:
diff changeset
   451
  static int _unsafe_array_copy_ctr;       // Slow-path includes alignment checks
489c9b5090e2 Initial load
duke
parents:
diff changeset
   452
  static int _generic_array_copy_ctr;      // Slow-path includes type decoding
489c9b5090e2 Initial load
duke
parents:
diff changeset
   453
  static int _slow_array_copy_ctr;         // Slow-path failed out to a method call
489c9b5090e2 Initial load
duke
parents:
diff changeset
   454
489c9b5090e2 Initial load
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parents:
diff changeset
   455
  static int _new_instance_ctr;            // 'new' object requires GC
489c9b5090e2 Initial load
duke
parents:
diff changeset
   456
  static int _new_array_ctr;               // 'new' array requires GC
489c9b5090e2 Initial load
duke
parents:
diff changeset
   457
  static int _multi1_ctr, _multi2_ctr, _multi3_ctr, _multi4_ctr, _multi5_ctr;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   458
  static int _find_handler_ctr;            // find exception handler
489c9b5090e2 Initial load
duke
parents:
diff changeset
   459
  static int _rethrow_ctr;                 // rethrow exception
489c9b5090e2 Initial load
duke
parents:
diff changeset
   460
  static int _mon_enter_stub_ctr;          // monitor enter stub
489c9b5090e2 Initial load
duke
parents:
diff changeset
   461
  static int _mon_exit_stub_ctr;           // monitor exit stub
489c9b5090e2 Initial load
duke
parents:
diff changeset
   462
  static int _mon_enter_ctr;               // monitor enter slow
489c9b5090e2 Initial load
duke
parents:
diff changeset
   463
  static int _mon_exit_ctr;                // monitor exit slow
489c9b5090e2 Initial load
duke
parents:
diff changeset
   464
  static int _partial_subtype_ctr;         // SubRoutines::partial_subtype_check
489c9b5090e2 Initial load
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parents:
diff changeset
   465
489c9b5090e2 Initial load
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parents:
diff changeset
   466
  // Statistics code
489c9b5090e2 Initial load
duke
parents:
diff changeset
   467
  // stats for "normal" compiled calls (non-interface)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   468
  static int     _nof_normal_calls;              // total # of calls
489c9b5090e2 Initial load
duke
parents:
diff changeset
   469
  static int     _nof_optimized_calls;           // total # of statically-bound calls
489c9b5090e2 Initial load
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parents:
diff changeset
   470
  static int     _nof_inlined_calls;             // total # of inlined normal calls
489c9b5090e2 Initial load
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parents:
diff changeset
   471
  static int     _nof_static_calls;              // total # of calls to static methods or super methods (invokespecial)
489c9b5090e2 Initial load
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parents:
diff changeset
   472
  static int     _nof_inlined_static_calls;      // total # of inlined static calls
489c9b5090e2 Initial load
duke
parents:
diff changeset
   473
  // stats for compiled interface calls
489c9b5090e2 Initial load
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parents:
diff changeset
   474
  static int     _nof_interface_calls;           // total # of compiled calls
489c9b5090e2 Initial load
duke
parents:
diff changeset
   475
  static int     _nof_optimized_interface_calls; // total # of statically-bound interface calls
489c9b5090e2 Initial load
duke
parents:
diff changeset
   476
  static int     _nof_inlined_interface_calls;   // total # of inlined interface calls
489c9b5090e2 Initial load
duke
parents:
diff changeset
   477
  static int     _nof_megamorphic_interface_calls;// total # of megamorphic interface calls
489c9b5090e2 Initial load
duke
parents:
diff changeset
   478
  // stats for runtime exceptions
489c9b5090e2 Initial load
duke
parents:
diff changeset
   479
  static int     _nof_removable_exceptions;      // total # of exceptions that could be replaced by branches due to inlining
489c9b5090e2 Initial load
duke
parents:
diff changeset
   480
489c9b5090e2 Initial load
duke
parents:
diff changeset
   481
 public: // for compiler
489c9b5090e2 Initial load
duke
parents:
diff changeset
   482
  static address nof_normal_calls_addr()                { return (address)&_nof_normal_calls; }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   483
  static address nof_optimized_calls_addr()             { return (address)&_nof_optimized_calls; }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   484
  static address nof_inlined_calls_addr()               { return (address)&_nof_inlined_calls; }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   485
  static address nof_static_calls_addr()                { return (address)&_nof_static_calls; }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   486
  static address nof_inlined_static_calls_addr()        { return (address)&_nof_inlined_static_calls; }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   487
  static address nof_interface_calls_addr()             { return (address)&_nof_interface_calls; }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   488
  static address nof_optimized_interface_calls_addr()   { return (address)&_nof_optimized_interface_calls; }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   489
  static address nof_inlined_interface_calls_addr()     { return (address)&_nof_inlined_interface_calls; }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   490
  static address nof_megamorphic_interface_calls_addr() { return (address)&_nof_megamorphic_interface_calls; }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   491
  static void print_call_statistics(int comp_total);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   492
  static void print_statistics();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   493
  static void print_ic_miss_histogram();
489c9b5090e2 Initial load
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parents:
diff changeset
   494
489c9b5090e2 Initial load
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parents:
diff changeset
   495
#endif // PRODUCT
489c9b5090e2 Initial load
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parents:
diff changeset
   496
};
489c9b5090e2 Initial load
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diff changeset
   497
489c9b5090e2 Initial load
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parents:
diff changeset
   498
489c9b5090e2 Initial load
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parents:
diff changeset
   499
// ---------------------------------------------------------------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
   500
// Implementation of AdapterHandlerLibrary
489c9b5090e2 Initial load
duke
parents:
diff changeset
   501
//
489c9b5090e2 Initial load
duke
parents:
diff changeset
   502
// This library manages argument marshaling adapters and native wrappers.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   503
// There are 2 flavors of adapters: I2C and C2I.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   504
//
489c9b5090e2 Initial load
duke
parents:
diff changeset
   505
// The I2C flavor takes a stock interpreted call setup, marshals the arguments
489c9b5090e2 Initial load
duke
parents:
diff changeset
   506
// for a Java-compiled call, and jumps to Rmethod-> code()->
489c9b5090e2 Initial load
duke
parents:
diff changeset
   507
// instructions_begin().  It is broken to call it without an nmethod assigned.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   508
// The usual behavior is to lift any register arguments up out of the stack
489c9b5090e2 Initial load
duke
parents:
diff changeset
   509
// and possibly re-pack the extra arguments to be contigious.  I2C adapters
489c9b5090e2 Initial load
duke
parents:
diff changeset
   510
// will save what the interpreter's stack pointer will be after arguments are
489c9b5090e2 Initial load
duke
parents:
diff changeset
   511
// popped, then adjust the interpreter's frame size to force alignment and
489c9b5090e2 Initial load
duke
parents:
diff changeset
   512
// possibly to repack the arguments.  After re-packing, it jumps to the
489c9b5090e2 Initial load
duke
parents:
diff changeset
   513
// compiled code start.  There are no safepoints in this adapter code and a GC
489c9b5090e2 Initial load
duke
parents:
diff changeset
   514
// cannot happen while marshaling is in progress.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   515
//
489c9b5090e2 Initial load
duke
parents:
diff changeset
   516
// The C2I flavor takes a stock compiled call setup plus the target method in
489c9b5090e2 Initial load
duke
parents:
diff changeset
   517
// Rmethod, marshals the arguments for an interpreted call and jumps to
489c9b5090e2 Initial load
duke
parents:
diff changeset
   518
// Rmethod->_i2i_entry.  On entry, the interpreted frame has not yet been
489c9b5090e2 Initial load
duke
parents:
diff changeset
   519
// setup.  Compiled frames are fixed-size and the args are likely not in the
489c9b5090e2 Initial load
duke
parents:
diff changeset
   520
// right place.  Hence all the args will likely be copied into the
489c9b5090e2 Initial load
duke
parents:
diff changeset
   521
// interpreter's frame, forcing that frame to grow.  The compiled frame's
489c9b5090e2 Initial load
duke
parents:
diff changeset
   522
// outgoing stack args will be dead after the copy.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   523
//
489c9b5090e2 Initial load
duke
parents:
diff changeset
   524
// Native wrappers, like adapters, marshal arguments.  Unlike adapters they
489c9b5090e2 Initial load
duke
parents:
diff changeset
   525
// also perform an offical frame push & pop.  They have a call to the native
489c9b5090e2 Initial load
duke
parents:
diff changeset
   526
// routine in their middles and end in a return (instead of ending in a jump).
489c9b5090e2 Initial load
duke
parents:
diff changeset
   527
// The native wrappers are stored in real nmethods instead of the BufferBlobs
489c9b5090e2 Initial load
duke
parents:
diff changeset
   528
// used by the adapters.  The code generation happens here because it's very
489c9b5090e2 Initial load
duke
parents:
diff changeset
   529
// similar to what the adapters have to do.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   530
489c9b5090e2 Initial load
duke
parents:
diff changeset
   531
class AdapterHandlerEntry : public CHeapObj {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   532
 private:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   533
  address _i2c_entry;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   534
  address _c2i_entry;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   535
  address _c2i_unverified_entry;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   536
489c9b5090e2 Initial load
duke
parents:
diff changeset
   537
 public:
363
99d43e8a76ad 6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents: 189
diff changeset
   538
99d43e8a76ad 6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents: 189
diff changeset
   539
  // The name we give all buffer blobs
99d43e8a76ad 6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents: 189
diff changeset
   540
  static const char* name;
99d43e8a76ad 6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents: 189
diff changeset
   541
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   542
  AdapterHandlerEntry(address i2c_entry, address c2i_entry, address c2i_unverified_entry):
489c9b5090e2 Initial load
duke
parents:
diff changeset
   543
    _i2c_entry(i2c_entry),
489c9b5090e2 Initial load
duke
parents:
diff changeset
   544
    _c2i_entry(c2i_entry),
489c9b5090e2 Initial load
duke
parents:
diff changeset
   545
    _c2i_unverified_entry(c2i_unverified_entry) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   546
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   547
489c9b5090e2 Initial load
duke
parents:
diff changeset
   548
  address get_i2c_entry()            { return _i2c_entry; }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   549
  address get_c2i_entry()            { return _c2i_entry; }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   550
  address get_c2i_unverified_entry() { return _c2i_unverified_entry; }
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   551
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  void relocate(address new_base);
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#ifndef PRODUCT
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  void print();
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#endif /* PRODUCT */
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};
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   557
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class AdapterHandlerLibrary: public AllStatic {
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 private:
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3ab85419f523 6834177: Running jsynprog on Solaris Nevada can cause JVM crash
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  static BufferBlob* _buffer; // the temporary code buffer in CodeCache
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  static GrowableArray<uint64_t>* _fingerprints; // the fingerprint collection
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  static GrowableArray<AdapterHandlerEntry*> * _handlers; // the corresponding handlers
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  enum {
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    AbstractMethodHandler = 1 // special handler for abstract methods
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  };
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   566
  static BufferBlob* buffer_blob();
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  static void initialize();
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   568
  static int get_create_adapter_index(methodHandle method);
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   569
  static address get_i2c_entry( int index ) {
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    return get_entry(index)->get_i2c_entry();
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  }
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   572
  static address get_c2i_entry( int index ) {
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    return get_entry(index)->get_c2i_entry();
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   574
  }
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   575
  static address get_c2i_unverified_entry( int index ) {
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   576
    return get_entry(index)->get_c2i_unverified_entry();
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  }
1
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   578
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   579
 public:
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   580
  static AdapterHandlerEntry* get_entry( int index ) { return _handlers->at(index); }
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   581
  static nmethod* create_native_wrapper(methodHandle method);
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   582
  static AdapterHandlerEntry* get_adapter(methodHandle method)  {
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   583
    return get_entry(get_create_adapter_index(method));
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   584
  }
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   585
#ifdef HAVE_DTRACE_H
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   586
  static nmethod* create_dtrace_nmethod (methodHandle method);
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#endif // HAVE_DTRACE_H
1
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   588
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#ifndef PRODUCT
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   590
  static void print_handler(CodeBlob* b);
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   591
  static bool contains(CodeBlob* b);
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#endif /* PRODUCT */
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   593
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   594
};