1 /* 2 * Copyright (c) 2003, 2005, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 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. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 #include "util.h" 27 #include "FrameID.h" 28 #include "threadControl.h" 29 30 /* FrameID: */ 31 32 /* ------------------------------------------------------------ */ 33 /* | thread frame generation (48 bits)| frame number (16 bits)| */ 34 /* ------------------------------------------------------------ */ 35 36 #define FNUM_BWIDTH 16 37 #define FNUM_BMASK ((1<<FNUM_BWIDTH)-1) 38 39 FrameID 40 createFrameID(jthread thread, FrameNumber fnum) 41 { 42 FrameID frame; 43 jlong frameGeneration; 44 45 frameGeneration = threadControl_getFrameGeneration(thread); 46 frame = (frameGeneration<<FNUM_BWIDTH) | (jlong)fnum; 47 return frame; 48 } 49 50 FrameNumber 51 getFrameNumber(FrameID frame) 52 { 53 /*LINTED*/ 54 return (FrameNumber)(((jint)frame) & FNUM_BMASK); 55 } 56 57 jdwpError 58 validateFrameID(jthread thread, FrameID frame) 59 { 60 jlong frameGeneration; 61 62 frameGeneration = threadControl_getFrameGeneration(thread); 63 if ( frameGeneration != (frame>>FNUM_BWIDTH) ) { 64 return JDWP_ERROR(INVALID_FRAMEID); 65 } 66 return JDWP_ERROR(NONE); 67 } 68