mirror of
git://gcc.gnu.org/git/gcc.git
synced 2024-12-24 13:19:52 +08:00
8a9220959f
* java/lang/reflect/natConstructor.cc (newInstance): Use _Jv_CallAnyMethodA. * include/jvm.h: Declare _Jv_CallAnyMethodA. * java/lang/reflect/natMethod.cc (_Jv_CallAnyMethodA): Renamed from _Jv_CallNonvirtualMethodA. Changed interface; overloaded. Include <jni.h>. (COPY): Removed. (invoke): Use _Jv_CallAnyMethodA. (VAL): Redefined. * java/lang/Class.h (Class): Declare JvGetFirstStaticField, JvNumStaticFields, JvNumMethods, and JvGetFirstMethod as friend functions. (struct _Jv_Method): Added getNextMethod method. (JvNumMethods): New function. (JvGetFirstMethod): Likewise. * gcj/field.h (JvGetFirstStaticField): New function. (JvNumStaticFields): Likewise. (getNextField): Renamed from getNextInstanceField. (struct _Jv_Field): New method getClass. * jni.cc: Wrote many new functions. * include/jni.h (JNI_TRUE): Define. (JNI_FALSE): Likewise. (jobject, jclass, jstring, jarray, jthrowable, jobjectArray, jbyteArray, jshortArray, jintArray, jlongArray, jbooleanArray, jcharArray, jfloatArray, jdoubleArray): New typedefs. (jfieldID, jmethodID): Likewise. (JNI_COMMIT, JNI_ABORT): New defines. (JNINativeMethod): New struct. (struct JNINativeInterface): Correctly declared more entries. (class _Jv_JNIEnv): Added `ex' member. (JNI_VERSION_1_1): New define. (JNI_VERSION_1_2): Likewise. * boehm.cc (_Jv_MarkObj): Use getNextField, not getNextInstanceField. From-SVN: r31553
555 lines
14 KiB
C++
555 lines
14 KiB
C++
// natMethod.cc - Native code for Method class.
|
|
|
|
/* Copyright (C) 1998, 1999, 2000 Red Hat, Inc.
|
|
|
|
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. */
|
|
|
|
#include <config.h>
|
|
|
|
#include <gcj/cni.h>
|
|
#include <jvm.h>
|
|
#include <jni.h>
|
|
|
|
#include <java/lang/reflect/Method.h>
|
|
#include <java/lang/reflect/Constructor.h>
|
|
#include <java/lang/reflect/InvocationTargetException.h>
|
|
#include <java/lang/reflect/Modifier.h>
|
|
|
|
#include <java/lang/Void.h>
|
|
#include <java/lang/Byte.h>
|
|
#include <java/lang/Boolean.h>
|
|
#include <java/lang/Character.h>
|
|
#include <java/lang/Short.h>
|
|
#include <java/lang/Integer.h>
|
|
#include <java/lang/Long.h>
|
|
#include <java/lang/Float.h>
|
|
#include <java/lang/Double.h>
|
|
#include <java/lang/IllegalArgumentException.h>
|
|
#include <java/lang/NullPointerException.h>
|
|
#include <java/lang/Class.h>
|
|
#include <gcj/method.h>
|
|
#include <gnu/gcj/RawData.h>
|
|
|
|
#define ObjectClass _CL_Q34java4lang6Object
|
|
extern java::lang::Class ObjectClass;
|
|
#define ClassClass _CL_Q34java4lang5Class
|
|
extern java::lang::Class ClassClass;
|
|
|
|
#include <stdlib.h>
|
|
|
|
#include <ffi.h>
|
|
|
|
#define VoidClass _CL_Q34java4lang4Void
|
|
extern java::lang::Class VoidClass;
|
|
#define ByteClass _CL_Q34java4lang4Byte
|
|
extern java::lang::Class ByteClass;
|
|
#define ShortClass _CL_Q34java4lang5Short
|
|
extern java::lang::Class ShortClass;
|
|
#define CharacterClass _CL_Q34java4lang9Character
|
|
extern java::lang::Class CharacterClass;
|
|
#define IntegerClass _CL_Q34java4lang7Integer
|
|
extern java::lang::Class IntegerClass;
|
|
#define LongClass _CL_Q34java4lang4Long
|
|
extern java::lang::Class LongClass;
|
|
#define FloatClass _CL_Q34java4lang5Float
|
|
extern java::lang::Class FloatClass;
|
|
#define DoubleClass _CL_Q34java4lang6Double
|
|
extern java::lang::Class DoubleClass;
|
|
|
|
struct cpair
|
|
{
|
|
jclass prim;
|
|
jclass wrap;
|
|
};
|
|
|
|
// This is used to determine when a primitive widening conversion is
|
|
// allowed.
|
|
static cpair primitives[] =
|
|
{
|
|
#define VOID 0
|
|
{ JvPrimClass (void), &VoidClass },
|
|
{ JvPrimClass (byte), &ByteClass },
|
|
#define SHORT 2
|
|
{ JvPrimClass (short), &ShortClass },
|
|
#define CHAR 3
|
|
{ JvPrimClass (char), &CharacterClass },
|
|
{ JvPrimClass (int), &IntegerClass },
|
|
{ JvPrimClass (long), &LongClass },
|
|
{ JvPrimClass (float), &FloatClass },
|
|
{ JvPrimClass (double), &DoubleClass },
|
|
{ NULL, NULL }
|
|
};
|
|
|
|
static jboolean
|
|
can_widen (jclass from, jclass to)
|
|
{
|
|
int fromx = -1, tox = -1;
|
|
|
|
for (int i = 0; primitives[i].prim; ++i)
|
|
{
|
|
if (primitives[i].wrap == from)
|
|
fromx = i;
|
|
if (primitives[i].prim == to)
|
|
tox = i;
|
|
}
|
|
|
|
// Can't handle a miss.
|
|
if (fromx == -1 || tox == -1)
|
|
return false;
|
|
// Can't handle Void arguments.
|
|
if (fromx == VOID || tox == VOID)
|
|
return false;
|
|
// Special-case short/char conversions.
|
|
if ((fromx == SHORT && tox == CHAR) || (fromx == CHAR && tox == SHORT))
|
|
return false;
|
|
|
|
return fromx <= tox;
|
|
}
|
|
|
|
static ffi_type *
|
|
get_ffi_type (jclass klass)
|
|
{
|
|
// A special case.
|
|
if (klass == NULL)
|
|
return &ffi_type_pointer;
|
|
|
|
ffi_type *r;
|
|
if (klass == JvPrimClass (byte))
|
|
r = &ffi_type_sint8;
|
|
else if (klass == JvPrimClass (short))
|
|
r = &ffi_type_sint16;
|
|
else if (klass == JvPrimClass (int))
|
|
r = &ffi_type_sint32;
|
|
else if (klass == JvPrimClass (long))
|
|
r = &ffi_type_sint64;
|
|
else if (klass == JvPrimClass (float))
|
|
r = &ffi_type_float;
|
|
else if (klass == JvPrimClass (double))
|
|
r = &ffi_type_double;
|
|
else if (klass == JvPrimClass (boolean))
|
|
{
|
|
// On some platforms a bool is a byte, on others an int.
|
|
if (sizeof (jboolean) == sizeof (jbyte))
|
|
r = &ffi_type_sint8;
|
|
else
|
|
{
|
|
JvAssert (sizeof (jboolean) == sizeof (jint));
|
|
r = &ffi_type_sint32;
|
|
}
|
|
}
|
|
else if (klass == JvPrimClass (char))
|
|
r = &ffi_type_uint16;
|
|
else
|
|
{
|
|
JvAssert (! klass->isPrimitive());
|
|
r = &ffi_type_pointer;
|
|
}
|
|
|
|
return r;
|
|
}
|
|
|
|
// Actually perform an FFI call.
|
|
void
|
|
java::lang::reflect::Method::hack_call (gnu::gcj::RawData *rcif,
|
|
gnu::gcj::RawData *rmethod,
|
|
gnu::gcj::RawData *rret_value,
|
|
gnu::gcj::RawData *rvalues)
|
|
{
|
|
ffi_cif *cif = (ffi_cif *) rcif;
|
|
void (*method) (...) = (void (*) (...)) rmethod;
|
|
void *ret_value = (void *) rret_value;
|
|
void **values = (void **) rvalues;
|
|
|
|
ffi_call (cif, method, ret_value, values);
|
|
}
|
|
|
|
jobject
|
|
java::lang::reflect::Method::invoke (jobject obj, jobjectArray args)
|
|
{
|
|
if (parameter_types == NULL)
|
|
getType ();
|
|
|
|
jmethodID meth = _Jv_FromReflectedMethod (this);
|
|
if (! java::lang::reflect::Modifier::isStatic(meth->accflags))
|
|
{
|
|
jclass k = obj ? obj->getClass() : NULL;
|
|
if (! obj)
|
|
JvThrow (new java::lang::NullPointerException);
|
|
if (! declaringClass->isAssignableFrom(k))
|
|
JvThrow (new java::lang::IllegalArgumentException);
|
|
// FIXME: access checks.
|
|
|
|
// Find the possibly overloaded method based on the runtime type
|
|
// of the object.
|
|
meth = _Jv_LookupDeclaredMethod (k, meth->name, meth->signature);
|
|
}
|
|
|
|
return _Jv_CallAnyMethodA (obj, return_type, meth, false,
|
|
parameter_types, args);
|
|
}
|
|
|
|
jint
|
|
java::lang::reflect::Method::getModifiers ()
|
|
{
|
|
return _Jv_FromReflectedMethod (this)->accflags;
|
|
}
|
|
|
|
jstring
|
|
java::lang::reflect::Method::getName ()
|
|
{
|
|
if (name == NULL)
|
|
name = _Jv_NewStringUtf8Const (_Jv_FromReflectedMethod (this)->name);
|
|
return name;
|
|
}
|
|
|
|
/* Internal method to set return_type and parameter_types fields. */
|
|
|
|
void
|
|
java::lang::reflect::Method::getType ()
|
|
{
|
|
_Jv_GetTypesFromSignature (_Jv_FromReflectedMethod (this),
|
|
declaringClass,
|
|
¶meter_types,
|
|
&return_type);
|
|
}
|
|
|
|
void
|
|
_Jv_GetTypesFromSignature (jmethodID method,
|
|
jclass declaringClass,
|
|
JArray<jclass> **arg_types_out,
|
|
jclass *return_type_out)
|
|
{
|
|
|
|
_Jv_Utf8Const* sig = method->signature;
|
|
java::lang::ClassLoader *loader = declaringClass->getClassLoader();
|
|
char *ptr = sig->data;
|
|
int numArgs = 0;
|
|
/* First just count the number of parameters. */
|
|
for (; ; ptr++)
|
|
{
|
|
switch (*ptr)
|
|
{
|
|
case 0:
|
|
case ')':
|
|
case 'V':
|
|
break;
|
|
case '[':
|
|
case '(':
|
|
continue;
|
|
case 'B':
|
|
case 'C':
|
|
case 'D':
|
|
case 'F':
|
|
case 'S':
|
|
case 'I':
|
|
case 'J':
|
|
case 'Z':
|
|
numArgs++;
|
|
continue;
|
|
case 'L':
|
|
numArgs++;
|
|
do
|
|
ptr++;
|
|
while (*ptr != ';' && ptr[1] != '\0');
|
|
continue;
|
|
}
|
|
break;
|
|
}
|
|
|
|
JArray<jclass> *args = (JArray<jclass> *)
|
|
JvNewObjectArray (numArgs, &ClassClass, NULL);
|
|
jclass* argPtr = elements (args);
|
|
for (ptr = sig->data; *ptr != '\0'; ptr++)
|
|
{
|
|
int num_arrays = 0;
|
|
jclass type;
|
|
for (; *ptr == '['; ptr++)
|
|
num_arrays++;
|
|
switch (*ptr)
|
|
{
|
|
default:
|
|
return;
|
|
case ')':
|
|
argPtr = return_type_out;
|
|
continue;
|
|
case '(':
|
|
continue;
|
|
case 'V':
|
|
case 'B':
|
|
case 'C':
|
|
case 'D':
|
|
case 'F':
|
|
case 'S':
|
|
case 'I':
|
|
case 'J':
|
|
case 'Z':
|
|
type = _Jv_FindClassFromSignature(ptr, loader);
|
|
break;
|
|
case 'L':
|
|
type = _Jv_FindClassFromSignature(ptr, loader);
|
|
do
|
|
ptr++;
|
|
while (*ptr != ';' && ptr[1] != '\0');
|
|
break;
|
|
}
|
|
|
|
// FIXME: 2'nd argument should be "current loader"
|
|
while (--num_arrays >= 0)
|
|
type = _Jv_FindArrayClass (type, 0);
|
|
// ARGPTR can be NULL if we are processing the return value of a
|
|
// call from Constructor.
|
|
if (argPtr)
|
|
*argPtr++ = type;
|
|
}
|
|
*arg_types_out = args;
|
|
}
|
|
|
|
// This is a very rough analog of the JNI CallNonvirtual<type>MethodA
|
|
// functions. It handles both Methods and Constructors, and it can
|
|
// handle any return type. In the Constructor case, the `obj'
|
|
// argument is unused and should be NULL; also, the `return_type' is
|
|
// the class that the constructor will construct. RESULT is a pointer
|
|
// to a `jvalue' (see jni.h); for a void method this should be NULL.
|
|
// This function returns an exception (if one was thrown), or NULL if
|
|
// the call went ok.
|
|
jthrowable
|
|
_Jv_CallAnyMethodA (jobject obj,
|
|
jclass return_type,
|
|
jmethodID meth,
|
|
jboolean is_constructor,
|
|
JArray<jclass> *parameter_types,
|
|
jvalue *args,
|
|
jvalue *result)
|
|
{
|
|
JvAssert (! is_constructor || ! obj);
|
|
JvAssert (! is_constructor || ! return_type);
|
|
|
|
// See whether call needs an object as the first argument. A
|
|
// constructor does need a `this' argument, but it is one we create.
|
|
jboolean needs_this = false;
|
|
if (is_constructor
|
|
|| ! java::lang::reflect::Modifier::isStatic(meth->accflags))
|
|
needs_this = true;
|
|
|
|
int param_count = parameter_types->length;
|
|
if (needs_this)
|
|
++param_count;
|
|
|
|
ffi_type *rtype;
|
|
// A constructor itself always returns void.
|
|
if (is_constructor || return_type == JvPrimClass (void))
|
|
rtype = &ffi_type_void;
|
|
else
|
|
rtype = get_ffi_type (return_type);
|
|
ffi_type **argtypes = (ffi_type **) alloca (param_count
|
|
* sizeof (ffi_type *));
|
|
|
|
jclass *paramelts = elements (parameter_types);
|
|
|
|
// FIXME: at some point the compiler is going to add extra arguments
|
|
// to some functions. In particular we are going to do this for
|
|
// handling access checks in reflection. We must add these hidden
|
|
// arguments here.
|
|
|
|
// Special case for the `this' argument of a constructor. Note that
|
|
// the JDK 1.2 docs specify that the new object must be allocated
|
|
// before argument conversions are done.
|
|
if (is_constructor)
|
|
{
|
|
// FIXME: must special-case String, arrays, maybe others here.
|
|
obj = JvAllocObject (return_type);
|
|
}
|
|
|
|
int i = 0;
|
|
int size = 0;
|
|
if (needs_this)
|
|
{
|
|
// The `NULL' type is `Object'.
|
|
argtypes[i++] = get_ffi_type (NULL);
|
|
size += sizeof (jobject);
|
|
}
|
|
|
|
for (int arg = 0; i < param_count; ++i, ++arg)
|
|
{
|
|
argtypes[i] = get_ffi_type (paramelts[arg]);
|
|
if (paramelts[arg]->isPrimitive())
|
|
size += paramelts[arg]->size();
|
|
else
|
|
size += sizeof (jobject);
|
|
}
|
|
|
|
ffi_cif cif;
|
|
if (ffi_prep_cif (&cif, FFI_DEFAULT_ABI, param_count,
|
|
rtype, argtypes) != FFI_OK)
|
|
{
|
|
// FIXME: throw some kind of VirtualMachineError here.
|
|
}
|
|
|
|
char *p = (char *) alloca (size);
|
|
void **values = (void **) alloca (param_count * sizeof (void *));
|
|
|
|
i = 0;
|
|
if (needs_this)
|
|
{
|
|
values[i] = p;
|
|
memcpy (p, &obj, sizeof (jobject));
|
|
p += sizeof (jobject);
|
|
++i;
|
|
}
|
|
|
|
for (int arg = 0; i < param_count; ++i, ++arg)
|
|
{
|
|
int tsize;
|
|
if (paramelts[arg]->isPrimitive())
|
|
tsize = paramelts[arg]->size();
|
|
else
|
|
tsize = sizeof (jobject);
|
|
|
|
// Copy appropriate bits from the jvalue into the ffi array.
|
|
// FIXME: we could do this copying all in one loop, above, by
|
|
// over-allocating a bit.
|
|
values[i] = p;
|
|
memcpy (p, &args[arg], tsize);
|
|
p += tsize;
|
|
}
|
|
|
|
// FIXME: initialize class here.
|
|
|
|
java::lang::Throwable *ex;
|
|
using namespace java::lang;
|
|
using namespace java::lang::reflect;
|
|
ex = Method::hack_trampoline ((gnu::gcj::RawData *) &cif,
|
|
(gnu::gcj::RawData *) meth->ncode,
|
|
(gnu::gcj::RawData *) result,
|
|
(gnu::gcj::RawData *) values);
|
|
|
|
if (ex)
|
|
// FIXME: this is wrong for JNI. But if we just return the
|
|
// exception, then the non-JNI cases won't be able to distinguish
|
|
// it from exceptions we might generate ourselves. Sigh.
|
|
ex = new InvocationTargetException (ex);
|
|
|
|
if (is_constructor)
|
|
result->l = obj;
|
|
|
|
return ex;
|
|
}
|
|
|
|
// This is another version of _Jv_CallAnyMethodA, but this one does
|
|
// more checking and is used by the reflection (and not JNI) code.
|
|
jobject
|
|
_Jv_CallAnyMethodA (jobject obj,
|
|
jclass return_type,
|
|
jmethodID meth,
|
|
jboolean is_constructor,
|
|
JArray<jclass> *parameter_types,
|
|
jobjectArray args)
|
|
{
|
|
// FIXME: access checks.
|
|
|
|
if (parameter_types->length != args->length)
|
|
JvThrow (new java::lang::IllegalArgumentException);
|
|
|
|
int param_count = parameter_types->length;
|
|
|
|
jclass *paramelts = elements (parameter_types);
|
|
jobject *argelts = elements (args);
|
|
jvalue argvals[param_count];
|
|
|
|
#define COPY(Where, What, Type) \
|
|
do { \
|
|
Type val = (What); \
|
|
memcpy ((Where), &val, sizeof (Type)); \
|
|
} while (0)
|
|
|
|
for (int i = 0; i < param_count; ++i)
|
|
{
|
|
jclass k = argelts[i] ? argelts[i]->getClass() : NULL;
|
|
if (paramelts[i]->isPrimitive())
|
|
{
|
|
if (! argelts[i]
|
|
|| ! k
|
|
|| ! can_widen (k, paramelts[i]))
|
|
JvThrow (new java::lang::IllegalArgumentException);
|
|
}
|
|
else
|
|
{
|
|
if (argelts[i] && ! paramelts[i]->isAssignableFrom (k))
|
|
JvThrow (new java::lang::IllegalArgumentException);
|
|
}
|
|
|
|
java::lang::Number *num = (java::lang::Number *) argelts[i];
|
|
if (paramelts[i] == JvPrimClass (byte))
|
|
COPY (&argvals[i], num->byteValue(), jbyte);
|
|
else if (paramelts[i] == JvPrimClass (short))
|
|
COPY (&argvals[i], num->shortValue(), jshort);
|
|
else if (paramelts[i] == JvPrimClass (int))
|
|
COPY (&argvals[i], num->intValue(), jint);
|
|
else if (paramelts[i] == JvPrimClass (long))
|
|
COPY (&argvals[i], num->longValue(), jlong);
|
|
else if (paramelts[i] == JvPrimClass (float))
|
|
COPY (&argvals[i], num->floatValue(), jfloat);
|
|
else if (paramelts[i] == JvPrimClass (double))
|
|
COPY (&argvals[i], num->doubleValue(), jdouble);
|
|
else if (paramelts[i] == JvPrimClass (boolean))
|
|
COPY (&argvals[i],
|
|
((java::lang::Boolean *) argelts[i])->booleanValue(),
|
|
jboolean);
|
|
else if (paramelts[i] == JvPrimClass (char))
|
|
COPY (&argvals[i],
|
|
((java::lang::Character *) argelts[i])->charValue(),
|
|
jchar);
|
|
else
|
|
{
|
|
JvAssert (! paramelts[i]->isPrimitive());
|
|
COPY (&argvals[i], argelts[i], jobject);
|
|
}
|
|
}
|
|
|
|
jvalue ret_value;
|
|
java::lang::Throwable *ex = _Jv_CallAnyMethodA (obj,
|
|
return_type,
|
|
meth,
|
|
is_constructor,
|
|
parameter_types,
|
|
argvals,
|
|
&ret_value);
|
|
|
|
if (ex)
|
|
JvThrow (ex);
|
|
|
|
jobject r;
|
|
#define VAL(Wrapper, Field) (new Wrapper (ret_value.Field))
|
|
if (is_constructor)
|
|
r = ret_value.l;
|
|
else if (return_type == JvPrimClass (byte))
|
|
r = VAL (java::lang::Byte, b);
|
|
else if (return_type == JvPrimClass (short))
|
|
r = VAL (java::lang::Short, s);
|
|
else if (return_type == JvPrimClass (int))
|
|
r = VAL (java::lang::Integer, i);
|
|
else if (return_type == JvPrimClass (long))
|
|
r = VAL (java::lang::Long, j);
|
|
else if (return_type == JvPrimClass (float))
|
|
r = VAL (java::lang::Float, f);
|
|
else if (return_type == JvPrimClass (double))
|
|
r = VAL (java::lang::Double, d);
|
|
else if (return_type == JvPrimClass (boolean))
|
|
r = VAL (java::lang::Boolean, z);
|
|
else if (return_type == JvPrimClass (char))
|
|
r = VAL (java::lang::Character, c);
|
|
else if (return_type == JvPrimClass (void))
|
|
r = NULL;
|
|
else
|
|
{
|
|
JvAssert (return_type == NULL || ! return_type->isPrimitive());
|
|
r = ret_value.l;
|
|
}
|
|
|
|
return r;
|
|
}
|