Mercurial > hg > graal-compiler
comparison agent/src/share/classes/sun/jvm/hotspot/runtime/NativeSignatureIterator.java @ 0:a61af66fc99e jdk7-b24
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author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | c18cbe5936b8 |
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1 /* | |
2 * Copyright 2001 Sun Microsystems, Inc. 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. | |
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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
21 * have any questions. | |
22 * | |
23 */ | |
24 | |
25 package sun.jvm.hotspot.runtime; | |
26 | |
27 import sun.jvm.hotspot.oops.*; | |
28 | |
29 /** Specialized SignatureIterator: Used for native call purposes */ | |
30 | |
31 public abstract class NativeSignatureIterator extends SignatureIterator { | |
32 private Method method; | |
33 // [RGV] We need seperate JNI and Java offset values because in 64 bit mode, the argument offsets | |
34 // are not in sync with the Java stack. For example a long takes up 1 "C" stack entry | |
35 // but 2 Java stack entries. | |
36 private int offset; // The java stack offset | |
37 private int prepended; // number of prepended JNI parameters (1 JNIEnv, plus 1 mirror if static) | |
38 private int jni_offset; // the current parameter offset, starting with 0 | |
39 | |
40 public void doBool () { passInt(); jni_offset++; offset++; } | |
41 public void doChar () { passInt(); jni_offset++; offset++; } | |
42 public void doFloat () { | |
43 if (VM.getVM().isLP64()) { | |
44 passFloat(); | |
45 } else { | |
46 passInt(); | |
47 } | |
48 jni_offset++; offset++; | |
49 } | |
50 | |
51 public void doDouble() { | |
52 if (VM.getVM().isLP64()) { | |
53 passDouble(); jni_offset++; offset += 2; | |
54 } else { | |
55 passDouble(); jni_offset += 2; offset += 2; | |
56 } | |
57 } | |
58 | |
59 public void doByte () { passInt(); jni_offset++; offset++; } | |
60 public void doShort () { passInt(); jni_offset++; offset++; } | |
61 public void doInt () { passInt(); jni_offset++; offset++; } | |
62 | |
63 public void doLong () { | |
64 if (VM.getVM().isLP64()) { | |
65 passLong(); jni_offset++; offset += 2; | |
66 } else { | |
67 passLong(); jni_offset += 2; offset += 2; | |
68 } | |
69 } | |
70 | |
71 public void doVoid () { throw new RuntimeException("should not reach here"); } | |
72 public void doObject(int begin, int end) { passObject(); jni_offset++; offset++; } | |
73 public void doArray (int begin, int end) { passObject(); jni_offset++; offset++; } | |
74 | |
75 public Method method() { return method; } | |
76 public int offset() { return offset; } | |
77 public int jniOffset() { return jni_offset + prepended; } | |
78 public boolean isStatic() { return method.isStatic(); } | |
79 | |
80 public abstract void passInt(); | |
81 public abstract void passLong(); | |
82 public abstract void passObject(); | |
83 public abstract void passFloat(); | |
84 public abstract void passDouble(); | |
85 | |
86 public NativeSignatureIterator(Method method) { | |
87 super(method.getSignature()); | |
88 this.method = method; | |
89 offset = 0; | |
90 jni_offset = 0; | |
91 | |
92 int JNIEnv_words = 1; | |
93 int mirror_words = 1; | |
94 prepended = !isStatic() ? JNIEnv_words : JNIEnv_words + mirror_words; | |
95 } | |
96 | |
97 // iterate() calles the 2 virtual methods according to the following invocation syntax: | |
98 // | |
99 // {pass_int | pass_long | pass_object} | |
100 // | |
101 // Arguments are handled from left to right (receiver first, if any). | |
102 // The offset() values refer to the Java stack offsets but are 0 based and increasing. | |
103 // The java_offset() values count down to 0, and refer to the Java TOS. | |
104 // The jni_offset() values increase from 1 or 2, and refer to C arguments. | |
105 public void iterate() { | |
106 if (!isStatic()) { | |
107 // handle receiver (not handled by iterate because not in signature) | |
108 passObject(); jni_offset++; offset++; | |
109 } | |
110 iterateParameters(); | |
111 } | |
112 } |