Mercurial > hg > graal-compiler
view src/share/vm/code/oopRecorder.cpp @ 20262:76b588255908
8035746: Add missing Klass::oop_is_instanceClassLoader() function
Reviewed-by: mgerdin, coleenp
author | stefank |
---|---|
date | Thu, 27 Feb 2014 10:36:50 +0100 |
parents | da91efe96a93 |
children | 9928ad27a80e |
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/* * Copyright (c) 1998, 2012, 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 * or visit www.oracle.com if you need additional information or have any * questions. * */ #include "precompiled.hpp" #include "ci/ciEnv.hpp" #include "ci/ciInstance.hpp" #include "ci/ciMetadata.hpp" #include "code/oopRecorder.hpp" #include "memory/allocation.inline.hpp" #include "oops/oop.inline.hpp" #ifdef ASSERT template <class T> int ValueRecorder<T>::_find_index_calls = 0; template <class T> int ValueRecorder<T>::_hit_indexes = 0; template <class T> int ValueRecorder<T>::_missed_indexes = 0; #endif //ASSERT template <class T> ValueRecorder<T>::ValueRecorder(Arena* arena) { _handles = NULL; _indexes = NULL; _arena = arena; _complete = false; } template <class T> template <class X> ValueRecorder<T>::IndexCache<X>::IndexCache() { assert(first_index > 0, "initial zero state of cache must be invalid index"); Copy::zero_to_bytes(&_cache[0], sizeof(_cache)); } template <class T> int ValueRecorder<T>::size() { _complete = true; if (_handles == NULL) return 0; return _handles->length() * sizeof(T); } template <class T> void ValueRecorder<T>::copy_values_to(nmethod* nm) { assert(_complete, "must be frozen"); maybe_initialize(); // get non-null handles, even if we have no oops nm->copy_values(_handles); } template <class T> void ValueRecorder<T>::maybe_initialize() { if (_handles == NULL) { if (_arena != NULL) { _handles = new(_arena) GrowableArray<T>(_arena, 10, 0, 0); _no_finds = new(_arena) GrowableArray<int>( _arena, 10, 0, 0); } else { _handles = new GrowableArray<T>(10, 0, 0); _no_finds = new GrowableArray<int>( 10, 0, 0); } } } template <class T> T ValueRecorder<T>::at(int index) { // there is always a NULL virtually present as first object if (index == null_index) return NULL; return _handles->at(index - first_index); } template <class T> int ValueRecorder<T>::add_handle(T h, bool make_findable) { assert(!_complete, "cannot allocate more elements after size query"); maybe_initialize(); // indexing uses 1 as an origin--0 means null int index = _handles->length() + first_index; _handles->append(h); // Support correct operation of find_index(). assert(!(make_findable && !is_real(h)), "nulls are not findable"); if (make_findable) { // This index may be returned from find_index(). if (_indexes != NULL) { int* cloc = _indexes->cache_location(h); _indexes->set_cache_location_index(cloc, index); } else if (index == index_cache_threshold && _arena != NULL) { _indexes = new(_arena) IndexCache<T>(); for (int i = 0; i < _handles->length(); i++) { // Load the cache with pre-existing elements. int index0 = i + first_index; if (_no_finds->contains(index0)) continue; int* cloc = _indexes->cache_location(_handles->at(i)); _indexes->set_cache_location_index(cloc, index0); } } } else if (is_real(h)) { // Remember that this index is not to be returned from find_index(). // This case is rare, because most or all uses of allocate_index pass // an argument of NULL or Universe::non_oop_word. // Thus, the expected length of _no_finds is zero. _no_finds->append(index); } return index; } template <class T> int ValueRecorder<T>::maybe_find_index(T h) { debug_only(_find_index_calls++); assert(!_complete, "cannot allocate more elements after size query"); maybe_initialize(); if (h == NULL) return null_index; assert(is_real(h), "must be valid"); int* cloc = (_indexes == NULL)? NULL: _indexes->cache_location(h); if (cloc != NULL) { int cindex = _indexes->cache_location_index(cloc); if (cindex == 0) { return -1; // We know this handle is completely new. } if (cindex >= first_index && _handles->at(cindex - first_index) == h) { debug_only(_hit_indexes++); return cindex; } if (!_indexes->cache_location_collision(cloc)) { return -1; // We know the current cache occupant is unique to that cloc. } } // Not found in cache, due to a cache collision. (Or, no cache at all.) // Do a linear search, most recent to oldest. for (int i = _handles->length() - 1; i >= 0; i--) { if (_handles->at(i) == h) { int findex = i + first_index; if (_no_finds->contains(findex)) continue; // oops; skip this one if (cloc != NULL) { _indexes->set_cache_location_index(cloc, findex); } debug_only(_missed_indexes++); return findex; } } return -1; } // Explicitly instantiate these types template class ValueRecorder<Metadata*>; template class ValueRecorder<jobject>;