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J. Duke
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hotspot/src/share/vm/runtime/stubRoutines.hpp
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261
hotspot/src/share/vm/runtime/stubRoutines.hpp
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/*
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* Copyright 1997-2007 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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// StubRoutines provides entry points to assembly routines used by
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// compiled code and the run-time system. Platform-specific entry
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// points are defined in the platform-specific inner class.
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//
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// Class scheme:
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//
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// platform-independent platform-dependent
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//
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// stubRoutines.hpp <-- included -- stubRoutines_<arch>.hpp
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// ^ ^
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// | |
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// implements implements
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// | |
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// | |
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// stubRoutines.cpp stubRoutines_<arch>.cpp
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// stubRoutines_<os_family>.cpp stubGenerator_<arch>.cpp
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// stubRoutines_<os_arch>.cpp
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//
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// Note 1: The important thing is a clean decoupling between stub
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// entry points (interfacing to the whole vm; i.e., 1-to-n
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// relationship) and stub generators (interfacing only to
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// the entry points implementation; i.e., 1-to-1 relationship).
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// This significantly simplifies changes in the generator
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// structure since the rest of the vm is not affected.
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//
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// Note 2: stubGenerator_<arch>.cpp contains a minimal portion of
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// machine-independent code; namely the generator calls of
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// the generator functions that are used platform-independently.
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// However, it comes with the advantage of having a 1-file
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// implementation of the generator. It should be fairly easy
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// to change, should it become a problem later.
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//
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// Scheme for adding a new entry point:
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//
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// 1. determine if it's a platform-dependent or independent entry point
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// a) if platform independent: make subsequent changes in the independent files
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// b) if platform dependent: make subsequent changes in the dependent files
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// 2. add a private instance variable holding the entry point address
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// 3. add a public accessor function to the instance variable
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// 4. implement the corresponding generator function in the platform-dependent
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// stubGenerator_<arch>.cpp file and call the function in generate_all() of that file
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class StubRoutines: AllStatic {
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public:
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enum platform_independent_constants {
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max_size_of_parameters = 256 // max. parameter size supported by megamorphic lookups
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};
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// Dependencies
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friend class StubGenerator;
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#include "incls/_stubRoutines_pd.hpp.incl" // machine-specific parts
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static jint _verify_oop_count;
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static address _verify_oop_subroutine_entry;
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static address _call_stub_return_address; // the return PC, when returning to a call stub
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static address _call_stub_entry;
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static address _forward_exception_entry;
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static address _catch_exception_entry;
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static address _throw_AbstractMethodError_entry;
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static address _throw_ArithmeticException_entry;
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static address _throw_NullPointerException_entry;
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static address _throw_NullPointerException_at_call_entry;
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static address _throw_StackOverflowError_entry;
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static address _handler_for_unsafe_access_entry;
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static address _atomic_xchg_entry;
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static address _atomic_xchg_ptr_entry;
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static address _atomic_store_entry;
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static address _atomic_store_ptr_entry;
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static address _atomic_cmpxchg_entry;
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static address _atomic_cmpxchg_ptr_entry;
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static address _atomic_cmpxchg_long_entry;
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static address _atomic_add_entry;
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static address _atomic_add_ptr_entry;
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static address _fence_entry;
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static address _d2i_wrapper;
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static address _d2l_wrapper;
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static jint _fpu_cntrl_wrd_std;
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static jint _fpu_cntrl_wrd_24;
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static jint _fpu_cntrl_wrd_64;
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static jint _fpu_cntrl_wrd_trunc;
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static jint _mxcsr_std;
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static jint _fpu_subnormal_bias1[3];
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static jint _fpu_subnormal_bias2[3];
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static BufferBlob* _code1; // code buffer for initial routines
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static BufferBlob* _code2; // code buffer for all other routines
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// Leaf routines which implement arraycopy and their addresses
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// arraycopy operands aligned on element type boundary
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static address _jbyte_arraycopy;
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static address _jshort_arraycopy;
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static address _jint_arraycopy;
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static address _jlong_arraycopy;
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static address _oop_arraycopy;
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static address _jbyte_disjoint_arraycopy;
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static address _jshort_disjoint_arraycopy;
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static address _jint_disjoint_arraycopy;
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static address _jlong_disjoint_arraycopy;
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static address _oop_disjoint_arraycopy;
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// arraycopy operands aligned on zero'th element boundary
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// These are identical to the ones aligned aligned on an
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// element type boundary, except that they assume that both
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// source and destination are HeapWord aligned.
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static address _arrayof_jbyte_arraycopy;
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static address _arrayof_jshort_arraycopy;
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static address _arrayof_jint_arraycopy;
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static address _arrayof_jlong_arraycopy;
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static address _arrayof_oop_arraycopy;
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static address _arrayof_jbyte_disjoint_arraycopy;
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static address _arrayof_jshort_disjoint_arraycopy;
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static address _arrayof_jint_disjoint_arraycopy;
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static address _arrayof_jlong_disjoint_arraycopy;
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static address _arrayof_oop_disjoint_arraycopy;
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// these are recommended but optional:
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static address _checkcast_arraycopy;
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static address _unsafe_arraycopy;
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static address _generic_arraycopy;
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public:
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// Initialization/Testing
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static void initialize1(); // must happen before universe::genesis
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static void initialize2(); // must happen after universe::genesis
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static bool contains(address addr) {
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return
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(_code1 != NULL && _code1->blob_contains(addr)) ||
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(_code2 != NULL && _code2->blob_contains(addr)) ;
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}
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// Debugging
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static jint verify_oop_count() { return _verify_oop_count; }
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static jint* verify_oop_count_addr() { return &_verify_oop_count; }
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// a subroutine for debugging the GC
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static address verify_oop_subroutine_entry_address() { return (address)&_verify_oop_subroutine_entry; }
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static address catch_exception_entry() { return _catch_exception_entry; }
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// Calls to Java
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typedef void (*CallStub)(
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address link,
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intptr_t* result,
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BasicType result_type,
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methodOopDesc* method,
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address entry_point,
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intptr_t* parameters,
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int size_of_parameters,
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TRAPS
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);
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static CallStub call_stub() { return CAST_TO_FN_PTR(CallStub, _call_stub_entry); }
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// Exceptions
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static address forward_exception_entry() { return _forward_exception_entry; }
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// Implicit exceptions
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static address throw_AbstractMethodError_entry() { return _throw_AbstractMethodError_entry; }
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static address throw_ArithmeticException_entry() { return _throw_ArithmeticException_entry; }
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static address throw_NullPointerException_entry() { return _throw_NullPointerException_entry; }
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static address throw_NullPointerException_at_call_entry(){ return _throw_NullPointerException_at_call_entry; }
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static address throw_StackOverflowError_entry() { return _throw_StackOverflowError_entry; }
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// Exceptions during unsafe access - should throw Java exception rather
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// than crash.
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static address handler_for_unsafe_access() { return _handler_for_unsafe_access_entry; }
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static address atomic_xchg_entry() { return _atomic_xchg_entry; }
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static address atomic_xchg_ptr_entry() { return _atomic_xchg_ptr_entry; }
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static address atomic_store_entry() { return _atomic_store_entry; }
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static address atomic_store_ptr_entry() { return _atomic_store_ptr_entry; }
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static address atomic_cmpxchg_entry() { return _atomic_cmpxchg_entry; }
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static address atomic_cmpxchg_ptr_entry() { return _atomic_cmpxchg_ptr_entry; }
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static address atomic_cmpxchg_long_entry() { return _atomic_cmpxchg_long_entry; }
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static address atomic_add_entry() { return _atomic_add_entry; }
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static address atomic_add_ptr_entry() { return _atomic_add_ptr_entry; }
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static address fence_entry() { return _fence_entry; }
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static address d2i_wrapper() { return _d2i_wrapper; }
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static address d2l_wrapper() { return _d2l_wrapper; }
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static jint fpu_cntrl_wrd_std() { return _fpu_cntrl_wrd_std; }
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static address addr_fpu_cntrl_wrd_std() { return (address)&_fpu_cntrl_wrd_std; }
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static address addr_fpu_cntrl_wrd_24() { return (address)&_fpu_cntrl_wrd_24; }
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static address addr_fpu_cntrl_wrd_64() { return (address)&_fpu_cntrl_wrd_64; }
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static address addr_fpu_cntrl_wrd_trunc() { return (address)&_fpu_cntrl_wrd_trunc; }
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static address addr_mxcsr_std() { return (address)&_mxcsr_std; }
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static address addr_fpu_subnormal_bias1() { return (address)&_fpu_subnormal_bias1; }
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static address addr_fpu_subnormal_bias2() { return (address)&_fpu_subnormal_bias2; }
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static address jbyte_arraycopy() { return _jbyte_arraycopy; }
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static address jshort_arraycopy() { return _jshort_arraycopy; }
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static address jint_arraycopy() { return _jint_arraycopy; }
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static address jlong_arraycopy() { return _jlong_arraycopy; }
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static address oop_arraycopy() { return _oop_arraycopy; }
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static address jbyte_disjoint_arraycopy() { return _jbyte_disjoint_arraycopy; }
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static address jshort_disjoint_arraycopy() { return _jshort_disjoint_arraycopy; }
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static address jint_disjoint_arraycopy() { return _jint_disjoint_arraycopy; }
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static address jlong_disjoint_arraycopy() { return _jlong_disjoint_arraycopy; }
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static address oop_disjoint_arraycopy() { return _oop_disjoint_arraycopy; }
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static address arrayof_jbyte_arraycopy() { return _arrayof_jbyte_arraycopy; }
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static address arrayof_jshort_arraycopy() { return _arrayof_jshort_arraycopy; }
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static address arrayof_jint_arraycopy() { return _arrayof_jint_arraycopy; }
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static address arrayof_jlong_arraycopy() { return _arrayof_jlong_arraycopy; }
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static address arrayof_oop_arraycopy() { return _arrayof_oop_arraycopy; }
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static address arrayof_jbyte_disjoint_arraycopy() { return _arrayof_jbyte_disjoint_arraycopy; }
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static address arrayof_jshort_disjoint_arraycopy() { return _arrayof_jshort_disjoint_arraycopy; }
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static address arrayof_jint_disjoint_arraycopy() { return _arrayof_jint_disjoint_arraycopy; }
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static address arrayof_jlong_disjoint_arraycopy() { return _arrayof_jlong_disjoint_arraycopy; }
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static address arrayof_oop_disjoint_arraycopy() { return _arrayof_oop_disjoint_arraycopy; }
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static address checkcast_arraycopy() { return _checkcast_arraycopy; }
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static address unsafe_arraycopy() { return _unsafe_arraycopy; }
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static address generic_arraycopy() { return _generic_arraycopy; }
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//
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// Default versions of the above arraycopy functions for platforms which do
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// not have specialized versions
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//
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static void jbyte_copy (jbyte* src, jbyte* dest, size_t count);
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static void jshort_copy(jshort* src, jshort* dest, size_t count);
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static void jint_copy (jint* src, jint* dest, size_t count);
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static void jlong_copy (jlong* src, jlong* dest, size_t count);
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static void oop_copy (oop* src, oop* dest, size_t count);
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static void arrayof_jbyte_copy (HeapWord* src, HeapWord* dest, size_t count);
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static void arrayof_jshort_copy(HeapWord* src, HeapWord* dest, size_t count);
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static void arrayof_jint_copy (HeapWord* src, HeapWord* dest, size_t count);
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static void arrayof_jlong_copy (HeapWord* src, HeapWord* dest, size_t count);
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static void arrayof_oop_copy (HeapWord* src, HeapWord* dest, size_t count);
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};
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