1 // java-interp.h - Header file for the bytecode interpreter. -*- c++ -*-
3 /* Copyright (C) 1999, 2000 Red Hat, Inc.
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>
23 #include <gnu/gcj/runtime/MethodInvocation.h>
29 extern inline jboolean
30 _Jv_IsInterpretedClass (jclass c
)
32 return (c
->loader
!= 0);
35 struct _Jv_ResolvedMethod
;
37 void _Jv_VerifyFieldSignature (_Jv_Utf8Const
*sig
);
38 void _Jv_VerifyMethodSignature (_Jv_Utf8Const
*sig
);
39 void _Jv_VerifyClassName (unsigned char* ptr
, _Jv_ushort length
);
40 void _Jv_VerifyClassName (_Jv_Utf8Const
*name
);
41 void _Jv_VerifyIdentifier (_Jv_Utf8Const
*);
42 bool _Jv_ClassNameSamePackage (_Jv_Utf8Const
*name1
, _Jv_Utf8Const
*name2
);
43 void _Jv_DefineClass (jclass
, jbyteArray
, jint
, jint
);
44 void _Jv_ResolveField (_Jv_Field
*, java::lang::ClassLoader
*);
46 void _Jv_InitField (jobject
, jclass
, int);
47 void * _Jv_AllocMethodInvocation (jsize size
);
49 /* FIXME: this should really be defined in some more generic place */
50 #define ROUND(V, A) (((((unsigned) (V))-1) | ((A)-1))+1)
52 /* the interpreter is written in C++, primarily because it makes it easy for
53 * the entire thing to be "friend" with class Class. */
55 class _Jv_InterpClass
;
56 class _Jv_InterpMethod
;
57 class _Jv_InterpMethodInvocation
;
59 class _Jv_InterpException
{
65 friend class _Jv_ClassReader
;
66 friend class _Jv_InterpMethod
;
69 // Base class for method representations. Subclasses are interpreted
74 // The class which defined this method.
75 _Jv_InterpClass
*defining_class
;
77 // The method description.
80 // Size of raw arguments.
81 _Jv_ushort args_raw_size
;
84 _Jv_Method
*get_method ()
90 class _Jv_InterpMethod
: public _Jv_MethodBase
93 _Jv_ushort max_locals
;
98 unsigned char* bytecode ()
101 ((unsigned char*)this)
102 + ROUND((sizeof (_Jv_InterpMethod
)
103 + exc_count
*sizeof (_Jv_InterpException
)), 4);
106 _Jv_InterpException
* exceptions ()
108 return (_Jv_InterpException
*) (this+1);
111 static size_t size (int exc_count
, int code_length
)
114 ROUND ((sizeof (_Jv_InterpMethod
)
115 + (exc_count
* sizeof (_Jv_InterpException
))), 4)
119 // return the method's invocation pointer (a stub).
121 void continue1 (_Jv_InterpMethodInvocation
*inv
);
123 static void run_normal (ffi_cif
*, void*, ffi_raw
*, void*);
124 static void run_synch_object (ffi_cif
*, void*, ffi_raw
*, void*);
125 static void run_synch_class (ffi_cif
*, void*, ffi_raw
*, void*);
127 inline jobject
run (ffi_cif
*, void*, ffi_raw
*,
128 _Jv_InterpMethodInvocation
*);
130 bool find_exception (jobject ex
,
131 _Jv_InterpMethodInvocation
*inv
);
134 static void dump_object(jobject o
);
136 friend class _Jv_ClassReader
;
137 friend class _Jv_InterpMethodInvocation
;
138 friend class gnu::gcj::runtime::MethodInvocation
;
140 friend void _Jv_PrepareClass(jclass
);
143 class _Jv_InterpMethodInvocation
{
144 _Jv_InterpMethod
*running
;
149 _Jv_word
* stack_base () { return &state
[0]; }
150 _Jv_word
* local_base () { return &state
[running
->max_stack
]; }
152 friend class _Jv_InterpMethod
;
155 class _Jv_InterpClass
: public java::lang::Class
157 _Jv_MethodBase
**interpreted_methods
;
158 _Jv_ushort
*field_initializers
;
160 friend class _Jv_ClassReader
;
161 friend class _Jv_InterpMethod
;
162 friend void _Jv_PrepareClass(jclass
);
163 friend void _Jv_InitField (jobject
, jclass
, int);
164 friend void* _Jv_MarkObj (void *, void *, void *, void *);
166 friend _Jv_MethodBase
** _Jv_GetFirstMethod (_Jv_InterpClass
*klass
);
169 extern inline _Jv_MethodBase
**
170 _Jv_GetFirstMethod (_Jv_InterpClass
*klass
)
172 return klass
->interpreted_methods
;
175 struct _Jv_ResolvedMethod
{
176 jint stack_item_count
;
181 // a resolved method holds the cif in-line, so that _Jv_MarkObj just needs
182 // to mark the resolved method to hold on to the cif. Some memory could be
183 // saved by keeping a cache of cif's, since many will be the same.
185 ffi_type
* arg_types
[0];
188 class _Jv_JNIMethod
: public _Jv_MethodBase
190 // The underlying function. If NULL we have to look for the
194 // This is the CIF used by the JNI function.
197 // These are the argument types used by the JNI function.
198 ffi_type
**jni_arg_types
;
200 // This function is used when making a JNI call from the interpreter.
201 static void call (ffi_cif
*, void *, ffi_raw
*, void *);
205 friend class _Jv_ClassReader
;
206 friend void _Jv_PrepareClass(jclass
);
209 // FIXME: this is ugly.
210 void set_function (void *f
)
216 #endif /* INTERPRETER */
218 #endif /* __JAVA_INTERP_H__ */