Quelle compiledMethod.inline.hpp Sprache: C

/*
* Copyright (c) 2017, 2020, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* questions.
*
*/

#ifndef SHARE_CODE_COMPILEDMETHOD_INLINE_HPP
#define SHARE_CODE_COMPILEDMETHOD_INLINE_HPP

#include "code/compiledMethod.hpp"

#include "code/nativeInst.hpp"
#include "runtime/atomic.hpp"
#include "runtime/frame.hpp"

inline bool CompiledMethod::is_deopt_pc(address pc) { return is_deopt_entry(pc) || is_deopt_mh_entry(pc); }

// When using JVMCI the address might be off by the size of a call instruction.
inline bool CompiledMethod::is_deopt_entry(address pc) {
  return pc == deopt_handler_begin()
#if INCLUDE_JVMCI
    || (is_compiled_by_jvmci() && pc == (deopt_handler_begin() + NativeCall::instruction_size))
#endif
    ;
}

inline bool CompiledMethod::is_deopt_mh_entry(address pc) {
  return pc == deopt_mh_handler_begin()
#if INCLUDE_JVMCI
    || (is_compiled_by_jvmci() && pc == (deopt_mh_handler_begin() + NativeCall::instruction_size))
#endif
    ;
}

// -----------------------------------------------------------------------------
// CompiledMethod::get_deopt_original_pc
//
// Return the original PC for the given PC if:
// (a) the given PC belongs to a nmethod and
// (b) it is a deopt PC

inline address CompiledMethod::get_deopt_original_pc(const frame* fr) {
  if (fr->cb() == NULL)  return NULL;

  CompiledMethod* cm = fr->cb()->as_compiled_method_or_null();
  if (cm != NULL && cm->is_deopt_pc(fr->pc()))
    return cm->get_original_pc(fr);

  return NULL;
}

// class ExceptionCache methods

inline int ExceptionCache::count() { return Atomic::load_acquire(&_count); }

address ExceptionCache::pc_at(int index) {
  assert(index >= 0 && index < count(),"");
  return _pc[index];
}

address ExceptionCache::handler_at(int index) {
  assert(index >= 0 && index < count(),"");
  return _handler[index];
}

// increment_count is only called under lock, but there may be concurrent readers.
inline void ExceptionCache::increment_count() { Atomic::release_store(&_count, _count + 1); }

#endif // SHARE_CODE_COMPILEDMETHOD_INLINE_HPP

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