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// execution.h - Execution engines. -*- c++ -*-
/* Copyright (C) 2004 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_EXECUTION_H__
#define __JAVA_EXECUTION_H__
// This represents one execution engine. Note that we use function
// pointers and not virtual methods to avoid calls to
// __cxa_call_unexpected and the like.
struct _Jv_ExecutionEngine
{
public:
void (*unregister) (jclass);
// FIXME: probably should handle this elsewhere, see how
// interpreter does it.
bool (*need_resolve_string_fields) ();
void (*verify) (jclass);
void (*allocate_static_fields) (jclass, int);
void (*create_ncode) (jclass);
_Jv_ResolvedMethod *(*resolve_method) (_Jv_Method *, jclass,
jboolean, jint);
void (*post_miranda_hook) (jclass);
};
// This handles all gcj-compiled code, including BC ABI.
struct _Jv_CompiledEngine : public _Jv_ExecutionEngine
{
public:
static void do_unregister (jclass)
{
}
static bool do_need_resolve_string_fields ()
{
return true;
}
static void do_verify (jclass klass)
{
_Jv_Linker::verify_type_assertions (klass);
}
static _Jv_ResolvedMethod *do_resolve_method (_Jv_Method *, jclass,
jboolean, jint)
{
return NULL;
}
static void do_allocate_static_fields (jclass, int)
{
// Compiled classes don't need this.
}
static void do_create_ncode (jclass)
{
// Not needed.
}
static void do_post_miranda_hook (jclass)
{
// Not needed.
}
_Jv_CompiledEngine ()
{
unregister = do_unregister;
need_resolve_string_fields = do_need_resolve_string_fields;
verify = do_verify;
allocate_static_fields = do_allocate_static_fields;
create_ncode = do_create_ncode;
resolve_method = do_resolve_method;
post_miranda_hook = do_post_miranda_hook;
}
// These operators make it so we don't have to link in libstdc++.
void *operator new (size_t bytes)
{
return _Jv_Malloc(bytes);
}
void operator delete (void *mem)
{
_Jv_Free(mem);
}
};
// This handles interpreted code.
class _Jv_InterpreterEngine : public _Jv_ExecutionEngine
{
public:
static void do_verify (jclass);
static void do_allocate_static_fields (jclass, int);
static void do_create_ncode (jclass);
static _Jv_ResolvedMethod *do_resolve_method (_Jv_Method *, jclass,
jboolean, jint);
static bool do_need_resolve_string_fields ()
{
return false;
}
static void do_unregister(jclass klass)
{
_Jv_UnregisterClass(klass);
}
static void do_post_miranda_hook (jclass);
_Jv_InterpreterEngine ()
{
unregister = do_unregister;
need_resolve_string_fields = do_need_resolve_string_fields;
verify = do_verify;
allocate_static_fields = do_allocate_static_fields;
create_ncode = do_create_ncode;
resolve_method = do_resolve_method;
post_miranda_hook = do_post_miranda_hook;
}
// These operators make it so we don't have to link in libstdc++.
void *operator new (size_t bytes)
{
return _Jv_Malloc(bytes);
}
void operator delete (void *mem)
{
_Jv_Free(mem);
}
};
extern _Jv_InterpreterEngine _Jv_soleInterpreterEngine;
extern _Jv_CompiledEngine _Jv_soleCompiledEngine;
#endif // __JAVA_EXECUTION_H__
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