hotspot/src/cpu/x86/vm/frame_x86.inline.hpp
author twisti
Fri, 30 Nov 2012 15:23:16 -0800
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child 16363 d6b2cbb70886
permissions -rw-r--r--
8003240: x86: move MacroAssembler into separate file Reviewed-by: kvn
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/*
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 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 *
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 */
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#ifndef CPU_X86_VM_FRAME_X86_INLINE_HPP
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#define CPU_X86_VM_FRAME_X86_INLINE_HPP
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#include "code/codeCache.hpp"
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// Inline functions for Intel frames:
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// Constructors:
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inline frame::frame() {
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  _pc = NULL;
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  _sp = NULL;
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  _unextended_sp = NULL;
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  _fp = NULL;
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  _cb = NULL;
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  _deopt_state = unknown;
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}
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inline frame::frame(intptr_t* sp, intptr_t* fp, address pc) {
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  _sp = sp;
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  _unextended_sp = sp;
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  _fp = fp;
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  _pc = pc;
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  assert(pc != NULL, "no pc?");
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  _cb = CodeCache::find_blob(pc);
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  adjust_unextended_sp();
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  address original_pc = nmethod::get_deopt_original_pc(this);
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  if (original_pc != NULL) {
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    _pc = original_pc;
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    _deopt_state = is_deoptimized;
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  } else {
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    _deopt_state = not_deoptimized;
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  }
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}
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inline frame::frame(intptr_t* sp, intptr_t* unextended_sp, intptr_t* fp, address pc) {
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  _sp = sp;
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  _unextended_sp = unextended_sp;
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  _fp = fp;
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  _pc = pc;
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  assert(pc != NULL, "no pc?");
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  _cb = CodeCache::find_blob(pc);
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  adjust_unextended_sp();
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  address original_pc = nmethod::get_deopt_original_pc(this);
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  if (original_pc != NULL) {
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    _pc = original_pc;
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    assert(((nmethod*)_cb)->insts_contains(_pc), "original PC must be in nmethod");
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    _deopt_state = is_deoptimized;
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  } else {
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    _deopt_state = not_deoptimized;
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  }
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}
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inline frame::frame(intptr_t* sp, intptr_t* fp) {
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  _sp = sp;
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  _unextended_sp = sp;
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  _fp = fp;
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  _pc = (address)(sp[-1]);
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  // Here's a sticky one. This constructor can be called via AsyncGetCallTrace
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  // when last_Java_sp is non-null but the pc fetched is junk. If we are truly
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  // unlucky the junk value could be to a zombied method and we'll die on the
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  // find_blob call. This is also why we can have no asserts on the validity
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  // of the pc we find here. AsyncGetCallTrace -> pd_get_top_frame_for_signal_handler
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  // -> pd_last_frame should use a specialized version of pd_last_frame which could
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  // call a specilaized frame constructor instead of this one.
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  // Then we could use the assert below. However this assert is of somewhat dubious
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  // value.
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  // assert(_pc != NULL, "no pc?");
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  _cb = CodeCache::find_blob(_pc);
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  adjust_unextended_sp();
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  address original_pc = nmethod::get_deopt_original_pc(this);
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  if (original_pc != NULL) {
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    _pc = original_pc;
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    _deopt_state = is_deoptimized;
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  } else {
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    _deopt_state = not_deoptimized;
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  }
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}
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// Accessors
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inline bool frame::equal(frame other) const {
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  bool ret =  sp() == other.sp()
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              && unextended_sp() == other.unextended_sp()
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              && fp() == other.fp()
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              && pc() == other.pc();
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  assert(!ret || ret && cb() == other.cb() && _deopt_state == other._deopt_state, "inconsistent construction");
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  return ret;
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}
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// Return unique id for this frame. The id must have a value where we can distinguish
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// identity and younger/older relationship. NULL represents an invalid (incomparable)
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// frame.
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inline intptr_t* frame::id(void) const { return unextended_sp(); }
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// Relationals on frames based
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// Return true if the frame is younger (more recent activation) than the frame represented by id
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inline bool frame::is_younger(intptr_t* id) const { assert(this->id() != NULL && id != NULL, "NULL frame id");
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                                                    return this->id() < id ; }
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// Return true if the frame is older (less recent activation) than the frame represented by id
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inline bool frame::is_older(intptr_t* id) const   { assert(this->id() != NULL && id != NULL, "NULL frame id");
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                                                    return this->id() > id ; }
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inline intptr_t* frame::link() const              { return (intptr_t*) *(intptr_t **)addr_at(link_offset); }
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inline void      frame::set_link(intptr_t* addr)  { *(intptr_t **)addr_at(link_offset) = addr; }
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inline intptr_t* frame::unextended_sp() const     { return _unextended_sp; }
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// Return address:
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inline address* frame::sender_pc_addr()      const { return (address*) addr_at( return_addr_offset); }
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inline address  frame::sender_pc()           const { return *sender_pc_addr(); }
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// return address of param, zero origin index.
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inline address* frame::native_param_addr(int idx) const { return (address*) addr_at( native_frame_initial_param_offset+idx); }
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#ifdef CC_INTERP
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inline interpreterState frame::get_interpreterState() const {
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  return ((interpreterState)addr_at( -((int)sizeof(BytecodeInterpreter))/wordSize ));
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}
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inline intptr_t*    frame::sender_sp()        const {
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  // Hmm this seems awfully expensive QQQ, is this really called with interpreted frames?
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  if (is_interpreted_frame()) {
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    assert(false, "should never happen");
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    return get_interpreterState()->sender_sp();
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  } else {
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    return            addr_at(sender_sp_offset);
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  }
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}
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inline intptr_t** frame::interpreter_frame_locals_addr() const {
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  assert(is_interpreted_frame(), "must be interpreted");
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  return &(get_interpreterState()->_locals);
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}
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inline intptr_t* frame::interpreter_frame_bcx_addr() const {
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  assert(is_interpreted_frame(), "must be interpreted");
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  return (intptr_t*) &(get_interpreterState()->_bcp);
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}
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// Constant pool cache
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inline ConstantPoolCache** frame::interpreter_frame_cache_addr() const {
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  assert(is_interpreted_frame(), "must be interpreted");
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  return &(get_interpreterState()->_constants);
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}
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// Method
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inline Method** frame::interpreter_frame_method_addr() const {
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  assert(is_interpreted_frame(), "must be interpreted");
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  return &(get_interpreterState()->_method);
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}
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inline intptr_t* frame::interpreter_frame_mdx_addr() const {
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  assert(is_interpreted_frame(), "must be interpreted");
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  return (intptr_t*) &(get_interpreterState()->_mdx);
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}
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// top of expression stack
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inline intptr_t* frame::interpreter_frame_tos_address() const {
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  assert(is_interpreted_frame(), "wrong frame type");
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  return get_interpreterState()->_stack + 1;
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}
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#else /* asm interpreter */
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inline intptr_t*    frame::sender_sp()        const { return            addr_at(   sender_sp_offset); }
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inline intptr_t** frame::interpreter_frame_locals_addr() const {
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  return (intptr_t**)addr_at(interpreter_frame_locals_offset);
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}
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inline intptr_t* frame::interpreter_frame_last_sp() const {
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  return *(intptr_t**)addr_at(interpreter_frame_last_sp_offset);
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}
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inline intptr_t* frame::interpreter_frame_bcx_addr() const {
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  return (intptr_t*)addr_at(interpreter_frame_bcx_offset);
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}
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inline intptr_t* frame::interpreter_frame_mdx_addr() const {
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  return (intptr_t*)addr_at(interpreter_frame_mdx_offset);
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}
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// Constant pool cache
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inline ConstantPoolCache** frame::interpreter_frame_cache_addr() const {
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  return (ConstantPoolCache**)addr_at(interpreter_frame_cache_offset);
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}
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// Method
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inline Method** frame::interpreter_frame_method_addr() const {
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  return (Method**)addr_at(interpreter_frame_method_offset);
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}
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// top of expression stack
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inline intptr_t* frame::interpreter_frame_tos_address() const {
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  intptr_t* last_sp = interpreter_frame_last_sp();
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  if (last_sp == NULL) {
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    return sp();
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  } else {
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    // sp() may have been extended or shrunk by an adapter.  At least
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    // check that we don't fall behind the legal region.
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    // For top deoptimized frame last_sp == interpreter_frame_monitor_end.
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    assert(last_sp <= (intptr_t*) interpreter_frame_monitor_end(), "bad tos");
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    return last_sp;
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  }
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}
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#endif /* CC_INTERP */
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inline int frame::pd_oop_map_offset_adjustment() const {
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  return 0;
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}
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inline int frame::interpreter_frame_monitor_size() {
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  return BasicObjectLock::size();
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}
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// expression stack
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// (the max_stack arguments are used by the GC; see class FrameClosure)
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inline intptr_t* frame::interpreter_frame_expression_stack() const {
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  intptr_t* monitor_end = (intptr_t*) interpreter_frame_monitor_end();
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  return monitor_end-1;
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}
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inline jint frame::interpreter_frame_expression_stack_direction() { return -1; }
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// Entry frames
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inline JavaCallWrapper* frame::entry_frame_call_wrapper() const {
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 return (JavaCallWrapper*)at(entry_frame_call_wrapper_offset);
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}
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// Compiled frames
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inline int frame::local_offset_for_compiler(int local_index, int nof_args, int max_nof_locals, int max_nof_monitors) {
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  return (nof_args - local_index + (local_index < nof_args ? 1: -1));
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}
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inline int frame::monitor_offset_for_compiler(int local_index, int nof_args, int max_nof_locals, int max_nof_monitors) {
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  return local_offset_for_compiler(local_index, nof_args, max_nof_locals, max_nof_monitors);
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}
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inline int frame::min_local_offset_for_compiler(int nof_args, int max_nof_locals, int max_nof_monitors) {
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  return (nof_args - (max_nof_locals + max_nof_monitors*2) - 1);
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}
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inline bool frame::volatile_across_calls(Register reg) {
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  return true;
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}
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inline oop frame::saved_oop_result(RegisterMap* map) const       {
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  return *((oop*) map->location(rax->as_VMReg()));
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}
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inline void frame::set_saved_oop_result(RegisterMap* map, oop obj) {
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  *((oop*) map->location(rax->as_VMReg())) = obj;
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}
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#endif // CPU_X86_VM_FRAME_X86_INLINE_HPP