Mercurial > hg > Members > kono > jpf-core

annotate src/main/gov/nasa/jpf/jvm/bytecode/RUNSTART.java @ 0:61d41facf527

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
initial v8 import (history reset)
author Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
date Fri, 23 Jan 2015 10:14:01 -0800
parents
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
0
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
1 /*
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
2 * Copyright (C) 2014, United States Government, as represented by the
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
3 * Administrator of the National Aeronautics and Space Administration.
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
4 * All rights reserved.
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
5 *
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
6 * The Java Pathfinder core (jpf-core) platform is licensed under the
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
7 * Apache License, Version 2.0 (the "License"); you may not use this file except
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
8 * in compliance with the License. You may obtain a copy of the License at
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
9 *
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
10 * http://www.apache.org/licenses/LICENSE-2.0.
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
11 *
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
12 * Unless required by applicable law or agreed to in writing, software
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
13 * distributed under the License is distributed on an "AS IS" BASIS,
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
15 * See the License for the specific language governing permissions and
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
16 * limitations under the License.
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
17 */
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
18
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
19 package gov.nasa.jpf.jvm.bytecode;
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
20
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
21 import gov.nasa.jpf.vm.Instruction;
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
22 import gov.nasa.jpf.vm.ThreadInfo;
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
23
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
24 /**
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
25 * this is an artificial instruction that is automatically prepended to
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
26 * a run()/main() method call.
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
27 *
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
28 * The main purpose is to have a special instruction marking the beginning
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
29 * of a new thread execution which does not cause CGs or is otherwise subject
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
30 * to execution semantics that change the program state.
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
31 *
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
32 * For instance, without it we would have to add a new ThreadInfo state to
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
33 * determine if the first instruction within this thread was re-executed or
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
34 * just happens to be the first transition we execute within this thread
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
35 *
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
36 */
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
37 public class RUNSTART extends Instruction implements JVMInstruction {
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
38
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
39 public RUNSTART () {
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
40 }
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
41
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
42 @Override
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
43 public Instruction execute (ThreadInfo ti) {
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
44 // nothing here, we could have used a NOP
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
45 return getNext(ti);
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
46 }
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
47
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
48 public static final int OPCODE = 257;
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
49
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
50 @Override
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
51 public int getByteCode () {
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
52 return OPCODE;
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
53 }
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
54
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
55 @Override
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
56 public boolean isExtendedInstruction() {
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
57 return true;
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
58 }
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
59
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
60 @Override
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
61 public void accept(JVMInstructionVisitor insVisitor) {
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
62 insVisitor.visit(this);
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
63 }
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
64 }