author | coleenp |
Wed, 15 Feb 2017 22:59:57 -0500 (2017-02-16) | |
changeset 46271 | 979ebd346ecf |
parent 42018 | 921e8769926b |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2014, 2016, 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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#include "precompiled.hpp" |
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#include "memory/allocation.hpp" |
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#include "memory/allocation.inline.hpp" |
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#include "memory/guardedMemory.hpp" |
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#include "runtime/os.hpp" |
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|
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void* GuardedMemory::wrap_copy(const void* ptr, const size_t len, const void* tag) { |
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size_t total_sz = GuardedMemory::get_total_size(len); |
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void* outerp = os::malloc(total_sz, mtInternal); |
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if (outerp != NULL) { |
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GuardedMemory guarded(outerp, len, tag); |
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void* innerp = guarded.get_user_ptr(); |
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memcpy(innerp, ptr, len); |
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return innerp; |
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} |
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return NULL; // OOM |
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} |
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bool GuardedMemory::free_copy(void* p) { |
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if (p == NULL) { |
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return true; |
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} |
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GuardedMemory guarded((u_char*)p); |
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bool verify_ok = guarded.verify_guards(); |
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/* always attempt to free, pass problem on to any nested memchecker */ |
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os::free(guarded.release_for_freeing()); |
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return verify_ok; |
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} |
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void GuardedMemory::print_on(outputStream* st) const { |
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if (_base_addr == NULL) { |
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st->print_cr("GuardedMemory(" PTR_FORMAT ") not associated to any memory", p2i(this)); |
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return; |
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} |
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st->print_cr("GuardedMemory(" PTR_FORMAT ") base_addr=" PTR_FORMAT |
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" tag=" PTR_FORMAT " user_size=" SIZE_FORMAT " user_data=" PTR_FORMAT, |
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p2i(this), p2i(_base_addr), p2i(get_tag()), get_user_size(), p2i(get_user_ptr())); |
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Guard* guard = get_head_guard(); |
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st->print_cr(" Header guard @" PTR_FORMAT " is %s", p2i(guard), (guard->verify() ? "OK" : "BROKEN")); |
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guard = get_tail_guard(); |
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st->print_cr(" Trailer guard @" PTR_FORMAT " is %s", p2i(guard), (guard->verify() ? "OK" : "BROKEN")); |
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u_char udata = *get_user_ptr(); |
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switch (udata) { |
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case uninitBlockPad: |
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st->print_cr(" User data appears unused"); |
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break; |
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case freeBlockPad: |
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st->print_cr(" User data appears to have been freed"); |
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break; |
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default: |
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st->print_cr(" User data appears to be in use"); |
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break; |
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} |
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} |