278 lines
6.5 KiB
C++
278 lines
6.5 KiB
C++
// java-interp.h - Header file for the bytecode interpreter. -*- c++ -*-
|
|
|
|
/* Copyright (C) 1999, 2000, 2001, 2002, 2003 Free Software Foundation
|
|
|
|
This file is part of libgcj.
|
|
|
|
This software is copyrighted work licensed under the terms of the
|
|
Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
|
|
details. */
|
|
|
|
#ifndef __JAVA_INTERP_H__
|
|
#define __JAVA_INTERP_H__
|
|
|
|
#include <jvm.h>
|
|
#include <java-cpool.h>
|
|
#include <gnu/gcj/runtime/NameFinder.h>
|
|
|
|
#ifdef INTERPRETER
|
|
|
|
#pragma interface
|
|
|
|
#include <java/lang/Class.h>
|
|
#include <java/lang/ClassLoader.h>
|
|
#include <java/lang/reflect/Modifier.h>
|
|
|
|
extern "C" {
|
|
#include <ffi.h>
|
|
}
|
|
|
|
extern inline jboolean
|
|
_Jv_IsInterpretedClass (jclass c)
|
|
{
|
|
return (c->accflags & java::lang::reflect::Modifier::INTERPRETED) != 0;
|
|
}
|
|
|
|
struct _Jv_ResolvedMethod;
|
|
|
|
void _Jv_InitInterpreter ();
|
|
void _Jv_DefineClass (jclass, jbyteArray, jint, jint);
|
|
|
|
void _Jv_InitField (jobject, jclass, int);
|
|
void * _Jv_AllocMethodInvocation (jsize size);
|
|
int _Jv_count_arguments (_Jv_Utf8Const *signature,
|
|
jboolean staticp = true);
|
|
void _Jv_VerifyMethod (_Jv_InterpMethod *method);
|
|
|
|
/* FIXME: this should really be defined in some more generic place */
|
|
#define ROUND(V, A) (((((unsigned) (V))-1) | ((A)-1))+1)
|
|
|
|
/* the interpreter is written in C++, primarily because it makes it easy for
|
|
* the entire thing to be "friend" with class Class. */
|
|
|
|
class _Jv_InterpClass;
|
|
class _Jv_InterpMethod;
|
|
|
|
// Before a method is "compiled" we store values as the bytecode PC,
|
|
// an int. Afterwards we store them as pointers into the prepared
|
|
// code itself.
|
|
union _Jv_InterpPC
|
|
{
|
|
int i;
|
|
void *p;
|
|
};
|
|
|
|
class _Jv_InterpException
|
|
{
|
|
_Jv_InterpPC start_pc;
|
|
_Jv_InterpPC end_pc;
|
|
_Jv_InterpPC handler_pc;
|
|
_Jv_InterpPC handler_type;
|
|
|
|
friend class _Jv_ClassReader;
|
|
friend class _Jv_InterpMethod;
|
|
friend class _Jv_BytecodeVerifier;
|
|
};
|
|
|
|
// Base class for method representations. Subclasses are interpreted
|
|
// and JNI methods.
|
|
class _Jv_MethodBase
|
|
{
|
|
protected:
|
|
// The class which defined this method.
|
|
jclass defining_class;
|
|
|
|
// The method description.
|
|
_Jv_Method *self;
|
|
|
|
// Size of raw arguments.
|
|
_Jv_ushort args_raw_size;
|
|
|
|
// Chain of addresses to fill in. See _Jv_Defer_Resolution.
|
|
void *deferred;
|
|
|
|
friend void _Jv_Defer_Resolution (void *cl, _Jv_Method *meth, void **);
|
|
friend void _Jv_PrepareClass(jclass);
|
|
|
|
public:
|
|
_Jv_Method *get_method ()
|
|
{
|
|
return self;
|
|
}
|
|
};
|
|
|
|
class _Jv_InterpMethod : public _Jv_MethodBase
|
|
{
|
|
_Jv_ushort max_stack;
|
|
_Jv_ushort max_locals;
|
|
int code_length;
|
|
|
|
_Jv_ushort exc_count;
|
|
|
|
void *prepared;
|
|
|
|
unsigned char* bytecode ()
|
|
{
|
|
return
|
|
((unsigned char*)this)
|
|
+ ROUND((sizeof (_Jv_InterpMethod)
|
|
+ exc_count*sizeof (_Jv_InterpException)), 4);
|
|
}
|
|
|
|
_Jv_InterpException * exceptions ()
|
|
{
|
|
return (_Jv_InterpException*) (this+1);
|
|
}
|
|
|
|
static size_t size (int exc_count, int code_length)
|
|
{
|
|
return
|
|
ROUND ((sizeof (_Jv_InterpMethod)
|
|
+ (exc_count * sizeof (_Jv_InterpException))), 4)
|
|
+ code_length;
|
|
}
|
|
|
|
// return the method's invocation pointer (a stub).
|
|
void *ncode ();
|
|
void compile (const void * const *);
|
|
|
|
static void run_normal (ffi_cif*, void*, ffi_raw*, void*);
|
|
static void run_synch_object (ffi_cif*, void*, ffi_raw*, void*);
|
|
static void run_class (ffi_cif*, void*, ffi_raw*, void*);
|
|
static void run_synch_class (ffi_cif*, void*, ffi_raw*, void*);
|
|
|
|
void run (void*, ffi_raw *);
|
|
|
|
public:
|
|
static void dump_object(jobject o);
|
|
|
|
friend class _Jv_ClassReader;
|
|
friend class _Jv_BytecodeVerifier;
|
|
friend class gnu::gcj::runtime::NameFinder;
|
|
friend class gnu::gcj::runtime::StackTrace;
|
|
|
|
|
|
friend void _Jv_PrepareClass(jclass);
|
|
|
|
#ifdef JV_MARKOBJ_DECL
|
|
friend JV_MARKOBJ_DECL;
|
|
#endif
|
|
};
|
|
|
|
class _Jv_InterpClass
|
|
{
|
|
_Jv_MethodBase **interpreted_methods;
|
|
_Jv_ushort *field_initializers;
|
|
|
|
friend class _Jv_ClassReader;
|
|
friend class _Jv_InterpMethod;
|
|
friend void _Jv_PrepareClass(jclass);
|
|
friend void _Jv_PrepareMissingMethods (jclass base2, jclass iface_class);
|
|
friend void _Jv_InitField (jobject, jclass, int);
|
|
#ifdef JV_MARKOBJ_DECL
|
|
friend JV_MARKOBJ_DECL;
|
|
#endif
|
|
|
|
friend _Jv_MethodBase ** _Jv_GetFirstMethod (_Jv_InterpClass *klass);
|
|
friend void _Jv_Defer_Resolution (void *cl, _Jv_Method *meth, void **);
|
|
};
|
|
|
|
// We have an interpreted class CL and we're trying to find the
|
|
// address of the ncode of a method METH. That interpreted class
|
|
// hasn't yet been prepared, so we defer fixups until they are ready.
|
|
// To do this, we create a chain of fixups that will be resolved by
|
|
// _Jv_PrepareClass.
|
|
extern inline void
|
|
_Jv_Defer_Resolution (void *cl, _Jv_Method *meth, void **address)
|
|
{
|
|
int i;
|
|
jclass self = (jclass) cl;
|
|
_Jv_InterpClass *interp_cl = (_Jv_InterpClass*) self->aux_info;
|
|
|
|
for (i = 0; i < self->method_count; i++)
|
|
{
|
|
_Jv_Method *m = &self->methods[i];
|
|
if (m == meth)
|
|
{
|
|
_Jv_MethodBase *imeth = interp_cl->interpreted_methods[i];
|
|
*address = imeth->deferred;
|
|
imeth->deferred = address;
|
|
return;
|
|
}
|
|
}
|
|
return;
|
|
}
|
|
|
|
extern inline _Jv_MethodBase **
|
|
_Jv_GetFirstMethod (_Jv_InterpClass *klass)
|
|
{
|
|
return klass->interpreted_methods;
|
|
}
|
|
|
|
struct _Jv_ResolvedMethod {
|
|
jint stack_item_count;
|
|
jint vtable_index;
|
|
jclass klass;
|
|
_Jv_Method* method;
|
|
|
|
// a resolved method holds the cif in-line, so that _Jv_MarkObj just needs
|
|
// to mark the resolved method to hold on to the cif. Some memory could be
|
|
// saved by keeping a cache of cif's, since many will be the same.
|
|
ffi_cif cif;
|
|
ffi_type * arg_types[0];
|
|
};
|
|
|
|
class _Jv_JNIMethod : public _Jv_MethodBase
|
|
{
|
|
// The underlying function. If NULL we have to look for the
|
|
// function.
|
|
void *function;
|
|
|
|
// This is the CIF used by the JNI function.
|
|
ffi_cif jni_cif;
|
|
|
|
// These are the argument types used by the JNI function.
|
|
ffi_type **jni_arg_types;
|
|
|
|
// This function is used when making a JNI call from the interpreter.
|
|
static void call (ffi_cif *, void *, ffi_raw *, void *);
|
|
|
|
void *ncode ();
|
|
|
|
friend class _Jv_ClassReader;
|
|
friend void _Jv_PrepareClass(jclass);
|
|
|
|
public:
|
|
// FIXME: this is ugly.
|
|
void set_function (void *f)
|
|
{
|
|
function = f;
|
|
}
|
|
};
|
|
|
|
// A structure of this type is used to link together interpreter
|
|
// invocations on the stack.
|
|
struct _Jv_MethodChain
|
|
{
|
|
const _Jv_InterpMethod *self;
|
|
_Jv_MethodChain **ptr;
|
|
_Jv_MethodChain *next;
|
|
|
|
_Jv_MethodChain (const _Jv_InterpMethod *s, _Jv_MethodChain **n)
|
|
{
|
|
self = s;
|
|
ptr = n;
|
|
next = *n;
|
|
*n = this;
|
|
}
|
|
|
|
~_Jv_MethodChain ()
|
|
{
|
|
*ptr = next;
|
|
}
|
|
};
|
|
|
|
#endif /* INTERPRETER */
|
|
|
|
#endif /* __JAVA_INTERP_H__ */
|