1010
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1 /*
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2 * Copyright 2003-2007 Sun Microsystems, Inc. All Rights Reserved.
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3 * Copyright 2008 Red Hat, Inc.
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4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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5 *
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6 * This code is free software; you can redistribute it and/or modify it
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7 * under the terms of the GNU General Public License version 2 only, as
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8 * published by the Free Software Foundation.
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9 *
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10 * This code is distributed in the hope that it will be useful, but WITHOUT
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11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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13 * version 2 for more details (a copy is included in the LICENSE file that
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14 * accompanied this code).
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15 *
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16 * You should have received a copy of the GNU General Public License version
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17 * 2 along with this work; if not, write to the Free Software Foundation,
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18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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19 *
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20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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21 * CA 95054 USA or visit www.sun.com if you need additional information or
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22 * have any questions.
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23 *
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24 */
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25
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26 #include "incls/_precompiled.incl"
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27 #include "incls/_nativeInst_zero.cpp.incl"
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28
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29 // This method is called by nmethod::make_not_entrant_or_zombie to
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30 // insert a jump to SharedRuntime::get_handle_wrong_method_stub()
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31 // (dest) at the start of a compiled method (verified_entry) to avoid
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32 // a race where a method is invoked while being made non-entrant.
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33 //
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34 // In Shark, verified_entry is a pointer to a SharkEntry. We can
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35 // handle this simply by changing it's entry point to point at the
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36 // interpreter. This only works because the interpreter and Shark
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37 // calling conventions are the same.
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38
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39 void NativeJump::patch_verified_entry(address entry,
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40 address verified_entry,
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41 address dest) {
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42 assert(dest == SharedRuntime::get_handle_wrong_method_stub(), "should be");
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43
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44 #ifdef CC_INTERP
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45 ((ZeroEntry*) verified_entry)->set_entry_point(
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46 (address) CppInterpreter::normal_entry);
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47 #else
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48 Unimplemented();
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49 #endif // CC_INTERP
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50 }
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