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/_jniFastGetField_x86_64.cpp.incl" 27 28 #define __ masm-> 29 30 #define BUFFER_SIZE 30*wordSize 31 32 // Instead of issuing lfence for LoadLoad barrier, we create data dependency 33 // between loads, which is more efficient than lfence. 34 35 // Common register usage: 36 // rax/xmm0: result 37 // c_rarg0: jni env 38 // c_rarg1: obj 39 // c_rarg2: jfield id 40 41 static const Register robj = r9; 42 static const Register rcounter = r10; 43 static const Register roffset = r11; 44 static const Register rcounter_addr = r11; 45 46 // Warning: do not use rip relative addressing after the first counter load | 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 "assembler_x86.inline.hpp" 27 #include "memory/resourceArea.hpp" 28 #include "prims/jniFastGetField.hpp" 29 #include "prims/jvm_misc.hpp" 30 #include "runtime/safepoint.hpp" 31 32 #define __ masm-> 33 34 #define BUFFER_SIZE 30*wordSize 35 36 // Instead of issuing lfence for LoadLoad barrier, we create data dependency 37 // between loads, which is more efficient than lfence. 38 39 // Common register usage: 40 // rax/xmm0: result 41 // c_rarg0: jni env 42 // c_rarg1: obj 43 // c_rarg2: jfield id 44 45 static const Register robj = r9; 46 static const Register rcounter = r10; 47 static const Register roffset = r11; 48 static const Register rcounter_addr = r11; 49 50 // Warning: do not use rip relative addressing after the first counter load |