1 // java-interp.h - Header file for the bytecode interpreter. -*- c++ -*-
3 /* Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004 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>
16 #include <gnu/gcj/runtime/NameFinder.h>
22 #include <java/lang/Class.h>
23 #include <java/lang/ClassLoader.h>
24 #include <java/lang/reflect/Modifier.h>
30 extern inline jboolean
31 _Jv_IsInterpretedClass (jclass c
)
33 return (c
->accflags
& java::lang::reflect::Modifier::INTERPRETED
) != 0;
36 struct _Jv_ResolvedMethod
;
38 void _Jv_InitInterpreter ();
39 void _Jv_DefineClass (jclass
, jbyteArray
, jint
, jint
,
40 java::security::ProtectionDomain
*);
42 void _Jv_InitField (jobject
, jclass
, int);
43 void * _Jv_AllocMethodInvocation (jsize size
);
44 int _Jv_count_arguments (_Jv_Utf8Const
*signature
,
45 jboolean staticp
= true);
46 void _Jv_VerifyMethod (_Jv_InterpMethod
*method
);
48 /* the interpreter is written in C++, primarily because it makes it easy for
49 * the entire thing to be "friend" with class Class. */
51 class _Jv_InterpClass
;
52 class _Jv_InterpMethod
;
54 // Before a method is "compiled" we store values as the bytecode PC,
55 // an int. Afterwards we store them as pointers into the prepared
63 class _Jv_InterpException
65 _Jv_InterpPC start_pc
;
67 _Jv_InterpPC handler_pc
;
68 _Jv_InterpPC handler_type
;
70 friend class _Jv_ClassReader
;
71 friend class _Jv_InterpMethod
;
72 friend class _Jv_BytecodeVerifier
;
75 // Base class for method representations. Subclasses are interpreted
80 // The class which defined this method.
81 jclass defining_class
;
83 // The method description.
86 // Size of raw arguments.
87 _Jv_ushort args_raw_size
;
89 friend class _Jv_InterpreterEngine
;
92 _Jv_Method
*get_method ()
98 class _Jv_InterpMethod
: public _Jv_MethodBase
100 _Jv_ushort max_stack
;
101 _Jv_ushort max_locals
;
104 _Jv_ushort exc_count
;
108 unsigned char* bytecode ()
111 ((unsigned char*)this)
112 + ROUND((sizeof (_Jv_InterpMethod
)
113 + exc_count
*sizeof (_Jv_InterpException
)), 4);
116 _Jv_InterpException
* exceptions ()
118 return (_Jv_InterpException
*) (this+1);
121 static size_t size (int exc_count
, int code_length
)
124 ROUND ((sizeof (_Jv_InterpMethod
)
125 + (exc_count
* sizeof (_Jv_InterpException
))), 4)
129 // return the method's invocation pointer (a stub).
131 void compile (const void * const *);
133 static void run_normal (ffi_cif
*, void*, ffi_raw
*, void*);
134 static void run_synch_object (ffi_cif
*, void*, ffi_raw
*, void*);
135 static void run_class (ffi_cif
*, void*, ffi_raw
*, void*);
136 static void run_synch_class (ffi_cif
*, void*, ffi_raw
*, void*);
138 void run (void*, ffi_raw
*);
141 static void dump_object(jobject o
);
143 friend class _Jv_ClassReader
;
144 friend class _Jv_BytecodeVerifier
;
145 friend class gnu::gcj::runtime::NameFinder
;
146 friend class gnu::gcj::runtime::StackTrace
;
147 friend class _Jv_InterpreterEngine
;
150 #ifdef JV_MARKOBJ_DECL
151 friend JV_MARKOBJ_DECL
;
155 class _Jv_InterpClass
157 _Jv_MethodBase
**interpreted_methods
;
158 _Jv_ushort
*field_initializers
;
160 friend class _Jv_ClassReader
;
161 friend class _Jv_InterpMethod
;
162 friend class _Jv_InterpreterEngine
;
163 friend void _Jv_InitField (jobject
, jclass
, int);
164 #ifdef JV_MARKOBJ_DECL
165 friend JV_MARKOBJ_DECL
;
168 friend _Jv_MethodBase
** _Jv_GetFirstMethod (_Jv_InterpClass
*klass
);
171 extern inline _Jv_MethodBase
**
172 _Jv_GetFirstMethod (_Jv_InterpClass
*klass
)
174 return klass
->interpreted_methods
;
177 struct _Jv_ResolvedMethod
{
178 jint stack_item_count
;
183 // a resolved method holds the cif in-line, so that _Jv_MarkObj just needs
184 // to mark the resolved method to hold on to the cif. Some memory could be
185 // saved by keeping a cache of cif's, since many will be the same.
187 ffi_type
* arg_types
[0];
190 class _Jv_JNIMethod
: public _Jv_MethodBase
192 // The underlying function. If NULL we have to look for the
196 // This is the CIF used by the JNI function.
199 // These are the argument types used by the JNI function.
200 ffi_type
**jni_arg_types
;
202 // This function is used when making a JNI call from the interpreter.
203 static void call (ffi_cif
*, void *, ffi_raw
*, void *);
207 friend class _Jv_ClassReader
;
208 friend class _Jv_InterpreterEngine
;
210 #ifdef JV_MARKOBJ_DECL
211 friend JV_MARKOBJ_DECL
;
215 // FIXME: this is ugly.
216 void set_function (void *f
)
222 // A structure of this type is used to link together interpreter
223 // invocations on the stack.
224 struct _Jv_MethodChain
226 const _Jv_InterpMethod
*self
;
227 _Jv_MethodChain
**ptr
;
228 _Jv_MethodChain
*next
;
230 _Jv_MethodChain (const _Jv_InterpMethod
*s
, _Jv_MethodChain
**n
)
244 #endif /* INTERPRETER */
246 #endif /* __JAVA_INTERP_H__ */