82 lines
2.8 KiB
C++
82 lines
2.8 KiB
C++
/*
|
|
* Copyright (c) 2014, 2016, 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 "memory/allocation.hpp"
|
|
#include "memory/allocation.inline.hpp"
|
|
#include "memory/guardedMemory.hpp"
|
|
#include "runtime/os.hpp"
|
|
|
|
void* GuardedMemory::wrap_copy(const void* ptr, const size_t len, const void* tag) {
|
|
size_t total_sz = GuardedMemory::get_total_size(len);
|
|
void* outerp = os::malloc(total_sz, mtInternal);
|
|
if (outerp != NULL) {
|
|
GuardedMemory guarded(outerp, len, tag);
|
|
void* innerp = guarded.get_user_ptr();
|
|
memcpy(innerp, ptr, len);
|
|
return innerp;
|
|
}
|
|
return NULL; // OOM
|
|
}
|
|
|
|
bool GuardedMemory::free_copy(void* p) {
|
|
if (p == NULL) {
|
|
return true;
|
|
}
|
|
GuardedMemory guarded((u_char*)p);
|
|
bool verify_ok = guarded.verify_guards();
|
|
|
|
/* always attempt to free, pass problem on to any nested memchecker */
|
|
os::free(guarded.release_for_freeing());
|
|
|
|
return verify_ok;
|
|
}
|
|
|
|
void GuardedMemory::print_on(outputStream* st) const {
|
|
if (_base_addr == NULL) {
|
|
st->print_cr("GuardedMemory(" PTR_FORMAT ") not associated to any memory", p2i(this));
|
|
return;
|
|
}
|
|
st->print_cr("GuardedMemory(" PTR_FORMAT ") base_addr=" PTR_FORMAT
|
|
" tag=" PTR_FORMAT " user_size=" SIZE_FORMAT " user_data=" PTR_FORMAT,
|
|
p2i(this), p2i(_base_addr), p2i(get_tag()), get_user_size(), p2i(get_user_ptr()));
|
|
|
|
Guard* guard = get_head_guard();
|
|
st->print_cr(" Header guard @" PTR_FORMAT " is %s", p2i(guard), (guard->verify() ? "OK" : "BROKEN"));
|
|
guard = get_tail_guard();
|
|
st->print_cr(" Trailer guard @" PTR_FORMAT " is %s", p2i(guard), (guard->verify() ? "OK" : "BROKEN"));
|
|
|
|
u_char udata = *get_user_ptr();
|
|
switch (udata) {
|
|
case uninitBlockPad:
|
|
st->print_cr(" User data appears unused");
|
|
break;
|
|
case freeBlockPad:
|
|
st->print_cr(" User data appears to have been freed");
|
|
break;
|
|
default:
|
|
st->print_cr(" User data appears to be in use");
|
|
break;
|
|
}
|
|
}
|