| 1 | /*
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| 2 | * Copyright (c) 2003, 2005, Oracle and/or its affiliates. All rights reserved.
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| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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| 4 | *
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| 5 | * This code is free software; you can redistribute it and/or modify it
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| 6 | * under the terms of the GNU General Public License version 2 only, as
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| 7 | * published by the Free Software Foundation. Oracle designates this
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| 8 | * particular file as subject to the "Classpath" exception as provided
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| 9 | * by Oracle in the LICENSE file that accompanied this code.
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| 10 | *
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| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT
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| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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| 14 | * version 2 for more details (a copy is included in the LICENSE file that
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| 15 | * accompanied this code).
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| 16 | *
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| 17 | * You should have received a copy of the GNU General Public License version
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| 18 | * 2 along with this work; if not, write to the Free Software Foundation,
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| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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| 20 | *
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| 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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| 22 | * or visit www.oracle.com if you need additional information or have any
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| 23 | * questions.
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| 24 | */
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| 25 |
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| 26 | #include "util.h"
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| 27 | #include "FrameID.h"
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| 28 | #include "threadControl.h"
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| 29 |
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| 30 | /* FrameID: */
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| 31 |
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| 32 | /* ------------------------------------------------------------ */
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| 33 | /* | thread frame generation (48 bits)| frame number (16 bits)| */
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| 34 | /* ------------------------------------------------------------ */
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| 35 |
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| 36 | #define FNUM_BWIDTH 16
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| 37 | #define FNUM_BMASK ((1<<FNUM_BWIDTH)-1)
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| 38 |
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| 39 | FrameID
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| 40 | createFrameID(jthread thread, FrameNumber fnum)
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| 41 | {
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| 42 | FrameID frame;
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| 43 | jlong frameGeneration;
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| 44 |
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| 45 | frameGeneration = threadControl_getFrameGeneration(thread);
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| 46 | frame = (frameGeneration<<FNUM_BWIDTH) | (jlong)fnum;
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| 47 | return frame;
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| 48 | }
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| 49 |
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| 50 | FrameNumber
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| 51 | getFrameNumber(FrameID frame)
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| 52 | {
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| 53 | /*LINTED*/
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| 54 | return (FrameNumber)(((jint)frame) & FNUM_BMASK);
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| 55 | }
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| 56 |
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| 57 | jdwpError
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| 58 | validateFrameID(jthread thread, FrameID frame)
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| 59 | {
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| 60 | jlong frameGeneration;
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| 61 |
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| 62 | frameGeneration = threadControl_getFrameGeneration(thread);
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| 63 | if ( frameGeneration != (frame>>FNUM_BWIDTH) ) {
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| 64 | return JDWP_ERROR(INVALID_FRAMEID);
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| 65 | }
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| 66 | return JDWP_ERROR(NONE);
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| 67 | }
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