5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 # include "incls/_precompiled.incl" 26 # include "incls/_basicLock.cpp.incl" 27 28 void BasicLock::print_on(outputStream* st) const { 29 st->print("monitor"); 30 } 31 32 void BasicLock::move_to(oop obj, BasicLock* dest) { 33 // Check to see if we need to inflate the lock. This is only needed 34 // if an object is locked using "this" lightweight monitor. In that 35 // case, the displaced_header() is unlocked, because the 36 // displaced_header() contains the header for the originally unlocked 37 // object. However the object could have already been inflated. But it 38 // does not matter, the inflation will just a no-op. For other cases, 39 // the displaced header will be either 0x0 or 0x3, which are location 40 // independent, therefore the BasicLock is free to move. 41 // 42 // During OSR we may need to relocate a BasicLock (which contains a 43 // displaced word) from a location in an interpreter frame to a 44 // new location in a compiled frame. "this" refers to the source 45 // basiclock in the interpreter frame. "dest" refers to the destination 46 // basiclock in the new compiled frame. We *always* inflate in move_to(). | 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 #include "runtime/basicLock.hpp" 27 #include "runtime/synchronizer.hpp" 28 29 void BasicLock::print_on(outputStream* st) const { 30 st->print("monitor"); 31 } 32 33 void BasicLock::move_to(oop obj, BasicLock* dest) { 34 // Check to see if we need to inflate the lock. This is only needed 35 // if an object is locked using "this" lightweight monitor. In that 36 // case, the displaced_header() is unlocked, because the 37 // displaced_header() contains the header for the originally unlocked 38 // object. However the object could have already been inflated. But it 39 // does not matter, the inflation will just a no-op. For other cases, 40 // the displaced header will be either 0x0 or 0x3, which are location 41 // independent, therefore the BasicLock is free to move. 42 // 43 // During OSR we may need to relocate a BasicLock (which contains a 44 // displaced word) from a location in an interpreter frame to a 45 // new location in a compiled frame. "this" refers to the source 46 // basiclock in the interpreter frame. "dest" refers to the destination 47 // basiclock in the new compiled frame. We *always* inflate in move_to(). |