1 // java-interp.h - Header file for the bytecode interpreter. -*- c++ -*-
3 /* Copyright (C) 1999, 2000, 2001 Free Software Foundation
5 This file is part of libgcj.
7 This software is copyrighted work licensed under the terms of the
8 Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
11 #ifndef __JAVA_INTERP_H__
12 #define __JAVA_INTERP_H__
15 #include <java-cpool.h>
21 #include <java/lang/Class.h>
22 #include <java/lang/ClassLoader.h>
28 extern inline jboolean
29 _Jv_IsInterpretedClass (jclass c)
31 return (c->loader != 0);
34 struct _Jv_ResolvedMethod;
36 bool _Jv_VerifyFieldSignature (_Jv_Utf8Const*sig);
37 bool _Jv_VerifyMethodSignature (_Jv_Utf8Const*sig);
38 bool _Jv_VerifyClassName (unsigned char* ptr, _Jv_ushort length);
39 bool _Jv_VerifyClassName (_Jv_Utf8Const *name);
40 bool _Jv_VerifyIdentifier (_Jv_Utf8Const *);
41 bool _Jv_ClassNameSamePackage (_Jv_Utf8Const *name1, _Jv_Utf8Const *name2);
42 void _Jv_DefineClass (jclass, jbyteArray, jint, jint);
44 void _Jv_InitField (jobject, jclass, int);
45 void * _Jv_AllocMethodInvocation (jsize size);
47 /* FIXME: this should really be defined in some more generic place */
48 #define ROUND(V, A) (((((unsigned) (V))-1) | ((A)-1))+1)
50 /* the interpreter is written in C++, primarily because it makes it easy for
51 * the entire thing to be "friend" with class Class. */
53 class _Jv_InterpClass;
54 class _Jv_InterpMethod;
55 class _Jv_InterpMethodInvocation;
57 class _Jv_InterpException {
63 friend class _Jv_ClassReader;
64 friend class _Jv_InterpMethod;
67 // Base class for method representations. Subclasses are interpreted
72 // The class which defined this method.
73 _Jv_InterpClass *defining_class;
75 // The method description.
78 // Size of raw arguments.
79 _Jv_ushort args_raw_size;
82 _Jv_Method *get_method ()
88 class _Jv_InterpMethod : public _Jv_MethodBase
91 _Jv_ushort max_locals;
96 unsigned char* bytecode ()
99 ((unsigned char*)this)
100 + ROUND((sizeof (_Jv_InterpMethod)
101 + exc_count*sizeof (_Jv_InterpException)), 4);
104 _Jv_InterpException * exceptions ()
106 return (_Jv_InterpException*) (this+1);
109 static size_t size (int exc_count, int code_length)
112 ROUND ((sizeof (_Jv_InterpMethod)
113 + (exc_count * sizeof (_Jv_InterpException))), 4)
117 // return the method's invocation pointer (a stub).
119 void continue1 (_Jv_InterpMethodInvocation *inv);
121 static void run_normal (ffi_cif*, void*, ffi_raw*, void*);
122 static void run_synch_object (ffi_cif*, void*, ffi_raw*, void*);
123 static void run_synch_class (ffi_cif*, void*, ffi_raw*, void*);
125 inline jobject run (ffi_cif*, void*, ffi_raw*,
126 _Jv_InterpMethodInvocation*);
128 bool find_exception (jobject ex,
129 _Jv_InterpMethodInvocation *inv);
132 static void dump_object(jobject o);
134 friend class _Jv_ClassReader;
135 friend class _Jv_InterpMethodInvocation;
137 friend void _Jv_PrepareClass(jclass);
140 class _Jv_InterpMethodInvocation {
141 _Jv_InterpMethod *running;
146 _Jv_word* stack_base () { return &state[0]; }
147 _Jv_word* local_base () { return &state[running->max_stack]; }
149 friend class _Jv_InterpMethod;
152 class _Jv_InterpClass : public java::lang::Class
154 _Jv_MethodBase **interpreted_methods;
155 _Jv_ushort *field_initializers;
157 friend class _Jv_ClassReader;
158 friend class _Jv_InterpMethod;
159 friend void _Jv_PrepareClass(jclass);
160 friend void _Jv_InitField (jobject, jclass, int);
161 friend void* _Jv_MarkObj (void *, void *, void *, void *);
163 friend _Jv_MethodBase ** _Jv_GetFirstMethod (_Jv_InterpClass *klass);
166 extern inline _Jv_MethodBase **
167 _Jv_GetFirstMethod (_Jv_InterpClass *klass)
169 return klass->interpreted_methods;
172 struct _Jv_ResolvedMethod {
173 jint stack_item_count;
178 // a resolved method holds the cif in-line, so that _Jv_MarkObj just needs
179 // to mark the resolved method to hold on to the cif. Some memory could be
180 // saved by keeping a cache of cif's, since many will be the same.
182 ffi_type * arg_types[0];
185 class _Jv_JNIMethod : public _Jv_MethodBase
187 // The underlying function. If NULL we have to look for the
191 // This is the CIF used by the JNI function.
194 // These are the argument types used by the JNI function.
195 ffi_type **jni_arg_types;
197 // This function is used when making a JNI call from the interpreter.
198 static void call (ffi_cif *, void *, ffi_raw *, void *);
202 friend class _Jv_ClassReader;
203 friend void _Jv_PrepareClass(jclass);
206 // FIXME: this is ugly.
207 void set_function (void *f)
213 #endif /* INTERPRETER */
215 #endif /* __JAVA_INTERP_H__ */