388 lines
9.6 KiB
C++
388 lines
9.6 KiB
C++
// natMethod.cc - Native code for Method class.
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/* Copyright (C) 1998, 1999 Cygnus Solutions
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This file is part of libgcj.
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This software is copyrighted work licensed under the terms of the
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Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
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details. */
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// This is about 90% done. Search for FIXME to see what remains.
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#include <config.h>
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#include <gcj/cni.h>
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#include <jvm.h>
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#include <java/lang/reflect/Method.h>
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#include <java/lang/reflect/InvocationTargetException.h>
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#include <java/lang/reflect/Modifier.h>
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#include <java/lang/Void.h>
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#include <java/lang/Byte.h>
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#include <java/lang/Boolean.h>
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#include <java/lang/Character.h>
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#include <java/lang/Short.h>
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#include <java/lang/Integer.h>
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#include <java/lang/Long.h>
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#include <java/lang/Float.h>
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#include <java/lang/Double.h>
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#include <java/lang/IllegalArgumentException.h>
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#include <java/lang/NullPointerException.h>
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#include <java/lang/Class.h>
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#include <gcj/method.h>
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#define ClassClass _CL_Q34java4lang5Class
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extern java::lang::Class ClassClass;
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#include <stdlib.h>
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#if 0
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#include <ffi.h>
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#define VoidClass _CL_Q34java4lang4Void
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extern java::lang::Class VoidClass;
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#define ByteClass _CL_Q34java4lang4Byte
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extern java::lang::Class ByteClass;
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#define ShortClass _CL_Q34java4lang5Short
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extern java::lang::Class ShortClass;
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#define CharacterClass _CL_Q34java4lang9Character
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extern java::lang::Class CharacterClass;
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#define IntegerClass _CL_Q34java4lang7Integer
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extern java::lang::Class IntegerClass;
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#define LongClass _CL_Q34java4lang4Long
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extern java::lang::Class LongClass;
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#define FloatClass _CL_Q34java4lang5Float
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extern java::lang::Class FloatClass;
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#define DoubleClass _CL_Q34java4lang6Double
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extern java::lang::Class DoubleClass;
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struct cpair
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{
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jclass prim;
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jclass wrap;
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};
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// This is used to determine when a primitive widening conversion is
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// allowed.
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static cpair primitives[] =
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{
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#define VOID 0
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{ JvPrimClass (void), &VoidClass },
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{ JvPrimClass (byte), &ByteClass },
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#define SHORT 2
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{ JvPrimClass (short), &ShortClass },
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#define CHAR 3
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{ JvPrimClass (char), &CharacterClass },
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{ JvPrimClass (int), &IntegerClass },
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{ JvPrimClass (long), &LongClass },
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{ JvPrimClass (float), &FloatClass },
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{ JvPrimClass (double), &DoubleClass },
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{ NULL, NULL }
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};
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static jboolean
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can_widen (jclass from, jclass to)
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{
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int fromx = -1, tox = -1;
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for (int i = 0; primitives[i].prim; ++i)
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{
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if (primitives[i].wrap == from)
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fromx = i;
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if (primitives[i].prim == to)
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tox = i;
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}
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// Can't handle a miss.
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if (fromx == -1 || tox == -1)
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return false;
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// Can't handle Void arguments.
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if (fromx == VOID || tox == VOID)
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return false;
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// Special-case short/char conversions.
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if ((fromx == SHORT && tox == CHAR) || (fromx == CHAR && tox == SHORT))
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return false;
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return fromx <= tox;
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}
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static ffi_type *
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get_ffi_type (jclass klass)
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{
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// A special case.
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if (klass == NULL)
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return &ffi_type_pointer;
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ffi_type *r;
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if (klass == JvPrimClass (byte))
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r = &ffi_type_sint8;
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else if (klass == JvPrimClass (short))
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r = &ffi_type_sint16;
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else if (klass == JvPrimClass (int))
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r = &ffi_type_sint32;
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else if (klass == JvPrimClass (long))
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r = &ffi_type_sint64;
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else if (klass == JvPrimClass (float))
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r = &ffi_type_float;
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else if (klass == JvPrimClass (double))
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r = &ffi_type_double;
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else if (klass == JvPrimClass (boolean))
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{
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// FIXME.
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r = &ffi_type_sint8;
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}
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else if (klass == JvPrimClass (char))
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r = &ffi_type_uint16;
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else
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{
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JvAssert (! klass->isPrimitive());
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r = &ffi_type_pointer;
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}
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return r;
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}
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// FIXME: the body of this method should be a separate function so
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// that Constructor can use it too.
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jobject
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java::lang::reflect::Method::invoke (jobject obj,
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jobjectArray args)
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{
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// FIXME: we need to be a friend of Class here.
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_Jv_Method *meth = decl_class->methods[index];
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if (! java::lang::reflect::Modifier::isStatic(modifiers))
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{
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jclass k = obj ? obj->getClass() : NULL;
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if (! obj || ! decl_class->isAssignableFrom(k))
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JvThrow (new java::lang::NullPointerException);
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// FIXME: access checks.
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meth = _Jv_LookupMethod (k, meth->name, meth->signature);
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}
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// FIXME: access checks.
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if (parameter_types->length != args->length)
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JvThrow (new java::lang::IllegalArgumentException);
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ffi_type *rtype = get_ffi_type (return_type);
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ffi_type **argtypes = (ffi_type **) alloca (parameter_types->length
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* sizeof (ffi_type *));
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jobject *paramelts = elements (parameter_types);
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jobject *argelts = elements (args);
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int size = 0;
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for (int i = 0; i < parameter_types->length; ++i)
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{
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jclass k = argelts[i] ? argelts[i]->getClass() : NULL;
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argtypes[i] = get_ffi_type (k);
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if (paramelts[i]->isPrimitive())
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{
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if (! argelts[i]
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|| ! k->isPrimitive ()
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|| ! can_widen (k, paramelts[i]))
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JvThrow (new java::lang::IllegalArgumentException);
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size += paramelts[i]->size();
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}
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else
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{
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if (argelts[i] && ! paramelts[i]->isAssignableFrom (k))
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JvThrow (new java::lang::IllegalArgumentException);
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size += sizeof (jobject);
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}
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}
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ffi_cif cif;
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if (ffi_prep_cif (&cif, FFI_DEFAULT_ABI, parameter_types->length,
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rtype, argtypes) != FFI_OK)
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{
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// FIXME: throw some kind of VirtualMachineError here.
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}
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char *values = (char *) alloca (size);
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char *p = values;
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#define COPY(Where, What, Type) \
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do { \
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Type val = (What); \
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memcpy ((Where), &val, sizeof (Type)); \
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Where += sizeof (Type); \
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} while (0)
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for (int i = 0; i < parameter_types->length; ++i)
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{
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java::lang::Number *num = (java::lang::Number *) paramelts[i];
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if (paramelts[i] == JvPrimClass (byte))
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COPY (p, num->byteValue(), jbyte);
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else if (paramelts[i] == JvPrimClass (short))
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COPY (p, num->shortValue(), jshort);
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else if (paramelts[i] == JvPrimClass (int))
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COPY (p, num->intValue(), jint);
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else if (paramelts[i] == JvPrimClass (long))
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COPY (p, num->longValue(), jlong);
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else if (paramelts[i] == JvPrimClass (float))
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COPY (p, num->floatValue(), jfloat);
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else if (paramelts[i] == JvPrimClass (double))
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COPY (p, num->doubleValue(), jdouble);
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else if (paramelts[i] == JvPrimClass (boolean))
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COPY (p, ((java::lang::Boolean *) argelts[i])->booleanValue(), jboolean);
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else if (paramelts[i] == JvPrimClass (char))
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COPY (p, ((java::lang::Character *) argelts[i])->charValue(), jchar);
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else
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{
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JvAssert (! paramelts[i]->isPrimitive());
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COPY (p, argelts[i], jobject);
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}
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}
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// FIXME: exception handling.
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java::lang::Throwable *ex;
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jdouble ret_value; // Largest possible value. Hopefully
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// it is aligned!
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ex = TRAMP_CALL (ffi_call (&cif, meth->ncode, &ret_value, (void *) values));
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if (ex)
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JvThrow (new InvocationTargetException (ex));
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jobject r;
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#define VAL(Wrapper, Type) (new Wrapper (* (Type *) &ret_value))
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if (return_type == JvPrimClass (byte))
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r = VAL (java::lang::Byte, jbyte);
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else if (return_type == JvPrimClass (short))
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r = VAL (java::lang::Short, jshort);
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else if (return_type == JvPrimClass (int))
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r = VAL (java::lang::Integer, jint);
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else if (return_type == JvPrimClass (long))
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r = VAL (java::lang::Long, jlong);
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else if (return_type == JvPrimClass (float))
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r = VAL (java::lang::Float, jfloat);
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else if (return_type == JvPrimClass (double))
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r = VAL (java::lang::Double, jdouble);
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else if (return_type == JvPrimClass (boolean))
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r = VAL (java::lang::Boolean, jboolean);
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else if (return_type == JvPrimClass (char))
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r = VAL (java::lang::Character, jchar);
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else if (return_type == JvPrimClass (void))
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r = NULL;
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else
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{
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JvAssert (! return_type->isPrimitive());
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r = VAL (java::lang::Object, jobject);
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}
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return r;
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}
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#else /* 0 */
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jobject
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java::lang::reflect::Method::invoke (jobject, jobjectArray)
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{
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JvFail ("not enabled yet");
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}
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#endif /* 0 */
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jint
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java::lang::reflect::Method::getModifiers ()
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{
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return _Jv_FromReflectedMethod (this)->accflags;
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}
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jstring
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java::lang::reflect::Method::getName ()
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{
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if (name == NULL)
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name = _Jv_NewStringUtf8Const (_Jv_FromReflectedMethod (this)->name);
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return name;
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}
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/* Internal method to set return_type and parameter_types fields. */
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void
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java::lang::reflect::Method::getType ()
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{
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_Jv_Utf8Const* sig = _Jv_FromReflectedMethod (this)->signature;
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java::lang::ClassLoader *loader = declaringClass->getClassLoader();
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char *ptr = sig->data;
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int numArgs = 0;
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/* First just count the number of parameters. */
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for (; ; ptr++)
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{
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switch (*ptr)
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{
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case 0:
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case ')':
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case 'V':
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break;
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case '[':
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case '(':
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continue;
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case 'B':
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case 'C':
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case 'D':
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case 'F':
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case 'S':
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case 'I':
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case 'J':
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case 'Z':
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numArgs++;
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continue;
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case 'L':
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numArgs++;
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do
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ptr++;
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while (*ptr != ';' && ptr[1] != '\0');
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continue;
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}
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break;
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}
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JArray<jclass> *args = (JArray<jclass> *)
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JvNewObjectArray (numArgs, &ClassClass, NULL);
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jclass* argPtr = elements (args);
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for (ptr = sig->data; *ptr != '\0'; ptr++)
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{
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int num_arrays = 0;
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jclass type;
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for (; *ptr == '['; ptr++)
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num_arrays++;
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switch (*ptr)
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{
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default:
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return;
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case ')':
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argPtr = &return_type;
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continue;
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case '(':
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continue;
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case 'V':
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case 'B':
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case 'C':
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case 'D':
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case 'F':
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case 'S':
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case 'I':
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case 'J':
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case 'Z':
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type = _Jv_FindClassFromSignature(ptr, loader);
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break;
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case 'L':
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type = _Jv_FindClassFromSignature(ptr, loader);
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do
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ptr++;
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while (*ptr != ';' && ptr[1] != '\0');
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break;
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}
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// FIXME: 2'nd argument should be "current loader"
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while (--num_arrays >= 0)
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type = _Jv_FindArrayClass (type, 0);
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*argPtr++ = type;
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}
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parameter_types = args;
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}
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