#include <config.h>
#include <java-interp.h>
#include <jvm.h>
#include <gcj/cni.h>
#include <string.h>
#include <java-cpool.h>
#include <java/lang/Class.h>
#include <java/lang/String.h>
#include <java/lang/StringBuffer.h>
#include <java/lang/Thread.h>
#include <java/lang/InternalError.h>
#include <java/lang/VirtualMachineError.h>
#include <java/lang/NoSuchFieldError.h>
#include <java/lang/NoSuchMethodError.h>
#include <java/lang/ClassFormatError.h>
#include <java/lang/IllegalAccessError.h>
#include <java/lang/AbstractMethodError.h>
#include <java/lang/NoClassDefFoundError.h>
#include <java/lang/IncompatibleClassChangeError.h>
#include <java/lang/reflect/Modifier.h>
using namespace gcj;
void
_Jv_ResolveField (_Jv_Field *field, java::lang::ClassLoader *loader)
{
if (! field->isResolved ())
{
_Jv_Utf8Const *sig = (_Jv_Utf8Const*)field->type;
field->type = _Jv_FindClassFromSignature (sig->data, loader);
field->flags &= ~_Jv_FIELD_UNRESOLVED_FLAG;
}
}
#ifdef INTERPRETER
static void throw_internal_error (char *msg)
__attribute__ ((__noreturn__));
static void throw_class_format_error (jstring msg)
__attribute__ ((__noreturn__));
static void throw_class_format_error (char *msg)
__attribute__ ((__noreturn__));
static int get_alignment_from_class (jclass);
static _Jv_ResolvedMethod*
_Jv_BuildResolvedMethod (_Jv_Method*,
jclass,
jboolean,
jint);
static void throw_incompatible_class_change_error (jstring msg)
{
throw new java::lang::IncompatibleClassChangeError (msg);
}
_Jv_word
_Jv_ResolvePoolEntry (jclass klass, int index)
{
using namespace java::lang::reflect;
_Jv_Constants *pool = &klass->constants;
if ((pool->tags[index] & JV_CONSTANT_ResolvedFlag) != 0)
return pool->data[index];
switch (pool->tags[index]) {
case JV_CONSTANT_Class:
{
_Jv_Utf8Const *name = pool->data[index].utf8;
jclass found;
if (name->data[0] == '[')
found = _Jv_FindClassFromSignature (&name->data[0],
klass->loader);
else
found = _Jv_FindClass (name, klass->loader);
if (! found)
{
jstring str = _Jv_NewStringUTF (name->data);
throw new java::lang::NoClassDefFoundError (str);
}
if ((found->accflags & Modifier::PUBLIC) == Modifier::PUBLIC
|| (_Jv_ClassNameSamePackage (found->name,
klass->name)))
{
pool->data[index].clazz = found;
pool->tags[index] |= JV_CONSTANT_ResolvedFlag;
}
else
{
throw new java::lang::IllegalAccessError (found->getName());
}
}
break;
case JV_CONSTANT_String:
{
jstring str;
str = _Jv_NewStringUtf8Const (pool->data[index].utf8);
pool->data[index].o = str;
pool->tags[index] |= JV_CONSTANT_ResolvedFlag;
}
break;
case JV_CONSTANT_Fieldref:
{
_Jv_ushort class_index, name_and_type_index;
_Jv_loadIndexes (&pool->data[index],
class_index,
name_and_type_index);
jclass owner = (_Jv_ResolvePoolEntry (klass, class_index)).clazz;
if (owner != klass)
_Jv_InitClass (owner);
_Jv_ushort name_index, type_index;
_Jv_loadIndexes (&pool->data[name_and_type_index],
name_index,
type_index);
_Jv_Utf8Const *field_name = pool->data[name_index].utf8;
_Jv_Utf8Const *field_type_name = pool->data[type_index].utf8;
jclass field_type = 0;
if (owner->loader != klass->loader)
field_type = _Jv_FindClassFromSignature (field_type_name->data,
klass->loader);
_Jv_Field* the_field = 0;
for (jclass cls = owner; cls != 0; cls = cls->getSuperclass ())
{
for (int i = 0; i < cls->field_count; i++)
{
_Jv_Field *field = &cls->fields[i];
if (! _Jv_equalUtf8Consts (field->name, field_name))
continue;
if ( (cls == klass)
|| ((field->flags & Modifier::PUBLIC) != 0)
|| (((field->flags & Modifier::PROTECTED) != 0)
&& cls->isAssignableFrom (klass))
|| (((field->flags & Modifier::PRIVATE) == 0)
&& _Jv_ClassNameSamePackage (cls->name,
klass->name)))
{
if (!field->isResolved ())
_Jv_ResolveField (field, cls->loader);
if (field_type != 0 && field->type != field_type)
throw new java::lang::LinkageError
(JvNewStringLatin1
("field type mismatch with different loaders"));
the_field = field;
goto end_of_field_search;
}
else
{
throw new java::lang::IllegalAccessError;
}
}
}
end_of_field_search:
if (the_field == 0)
{
java::lang::StringBuffer *sb = new java::lang::StringBuffer();
sb->append(JvNewStringLatin1("field "));
sb->append(owner->getName());
sb->append(JvNewStringLatin1("."));
sb->append(_Jv_NewStringUTF(field_name->data));
sb->append(JvNewStringLatin1(" was not found."));
throw_incompatible_class_change_error(sb->toString());
}
pool->data[index].field = the_field;
pool->tags[index] |= JV_CONSTANT_ResolvedFlag;
}
break;
case JV_CONSTANT_Methodref:
case JV_CONSTANT_InterfaceMethodref:
{
_Jv_ushort class_index, name_and_type_index;
_Jv_loadIndexes (&pool->data[index],
class_index,
name_and_type_index);
jclass owner = (_Jv_ResolvePoolEntry (klass, class_index)).clazz;
if (owner != klass)
_Jv_InitClass (owner);
_Jv_ushort name_index, type_index;
_Jv_loadIndexes (&pool->data[name_and_type_index],
name_index,
type_index);
_Jv_Utf8Const *method_name = pool->data[name_index].utf8;
_Jv_Utf8Const *method_signature = pool->data[type_index].utf8;
_Jv_Method *the_method = 0;
jclass found_class = 0;
the_method = _Jv_SearchMethodInClass (owner, klass,
method_name, method_signature);
if (the_method != 0)
{
found_class = owner;
goto end_of_method_search;
}
if (pool->tags[index] == JV_CONSTANT_InterfaceMethodref)
{
_Jv_ifaces ifaces;
ifaces.count = 0;
ifaces.len = 4;
ifaces.list = (jclass *) _Jv_Malloc (ifaces.len * sizeof (jclass *));
_Jv_GetInterfaces (owner, &ifaces);
for (int i = 0; i < ifaces.count; i++)
{
jclass cls = ifaces.list[i];
the_method = _Jv_SearchMethodInClass (cls, klass, method_name,
method_signature);
if (the_method != 0)
{
found_class = cls;
break;
}
}
_Jv_Free (ifaces.list);
if (the_method != 0)
goto end_of_method_search;
}
for (jclass cls = owner->getSuperclass (); cls != 0;
cls = cls->getSuperclass ())
{
the_method = _Jv_SearchMethodInClass (cls, klass,
method_name, method_signature);
if (the_method != 0)
{
found_class = cls;
break;
}
}
end_of_method_search:
if (the_method == 0)
{
java::lang::StringBuffer *sb = new java::lang::StringBuffer();
sb->append(JvNewStringLatin1("method "));
sb->append(owner->getName());
sb->append(JvNewStringLatin1("."));
sb->append(_Jv_NewStringUTF(method_name->data));
sb->append(JvNewStringLatin1(" was not found."));
throw new java::lang::NoSuchMethodError (sb->toString());
}
int vtable_index = -1;
if (pool->tags[index] != JV_CONSTANT_InterfaceMethodref)
vtable_index = (jshort)the_method->index;
pool->data[index].rmethod =
_Jv_BuildResolvedMethod(the_method,
found_class,
(the_method->accflags & Modifier::STATIC) != 0,
vtable_index);
pool->tags[index] |= JV_CONSTANT_ResolvedFlag;
}
break;
}
return pool->data[index];
}
_Jv_Method *
_Jv_SearchMethodInClass (jclass cls, jclass klass,
_Jv_Utf8Const *method_name,
_Jv_Utf8Const *method_signature)
{
using namespace java::lang::reflect;
for (int i = 0; i < cls->method_count; i++)
{
_Jv_Method *method = &cls->methods[i];
if ( (!_Jv_equalUtf8Consts (method->name,
method_name))
|| (!_Jv_equalUtf8Consts (method->signature,
method_signature)))
continue;
if (cls == klass
|| ((method->accflags & Modifier::PUBLIC) != 0)
|| (((method->accflags & Modifier::PROTECTED) != 0)
&& cls->isAssignableFrom (klass))
|| (((method->accflags & Modifier::PRIVATE) == 0)
&& _Jv_ClassNameSamePackage (cls->name,
klass->name)))
{
return method;
}
else
{
throw new java::lang::IllegalAccessError;
}
}
return 0;
}
void
_Jv_PrepareMissingMethods (jclass base2, jclass iface_class)
{
_Jv_InterpClass *base = reinterpret_cast<_Jv_InterpClass *> (base2);
for (int i = 0; i < iface_class->interface_count; ++i)
{
for (int j = 0; j < iface_class->interfaces[i]->method_count; ++j)
{
_Jv_Method *meth = &iface_class->interfaces[i]->methods[j];
if (meth->name->data[0] == '<')
continue;
_Jv_Method *new_meth = _Jv_LookupDeclaredMethod (base, meth->name,
meth->signature);
if (! new_meth)
{
int new_count = base->method_count + 1;
_Jv_Method *new_m
= (_Jv_Method *) _Jv_AllocBytes (sizeof (_Jv_Method)
* new_count);
memcpy (new_m, base->methods,
sizeof (_Jv_Method) * base->method_count);
new_m[base->method_count] = *meth;
new_m[base->method_count].index = (_Jv_ushort) -1;
new_m[base->method_count].accflags
|= java::lang::reflect::Modifier::INVISIBLE;
_Jv_MethodBase **new_im
= (_Jv_MethodBase **) _Jv_AllocBytes (sizeof (_Jv_MethodBase *)
* new_count);
memcpy (new_im, base->interpreted_methods,
sizeof (_Jv_MethodBase *) * base->method_count);
base->methods = new_m;
base->interpreted_methods = new_im;
base->method_count = new_count;
}
}
_Jv_PrepareMissingMethods (base, iface_class->interfaces[i]);
}
}
void
_Jv_PrepareClass(jclass klass)
{
using namespace java::lang::reflect;
if (! _Jv_IsInterpretedClass (klass))
return;
if (klass->state >= JV_STATE_PREPARED)
return;
if (klass->superclass)
java::lang::ClassLoader::resolveClass0 (klass->superclass);
_Jv_InterpClass *clz = (_Jv_InterpClass*)klass;
int instance_size;
int static_size;
if (clz->superclass)
instance_size = clz->superclass->size();
else
instance_size = java::lang::Object::class$.size();
static_size = 0;
for (int i = 0; i < clz->field_count; i++)
{
int field_size;
int field_align;
_Jv_Field *field = &clz->fields[i];
if (! field->isRef ())
{
_Jv_ResolveField (field, clz->loader);
field_size = field->type->size ();
field_align = get_alignment_from_class (field->type);
}
else
{
field_size = sizeof (jobject);
field_align = __alignof__ (jobject);
}
#ifndef COMPACT_FIELDS
field->bsize = field_size;
#endif
if (field->flags & Modifier::STATIC)
{
static_size = ROUND (static_size, field_align);
field->u.boffset = static_size;
static_size += field_size;
}
else
{
instance_size = ROUND (instance_size, field_align);
field->u.boffset = instance_size;
instance_size += field_size;
}
}
clz->size_in_bytes = instance_size;
if (static_size != 0)
{
char *static_data = (char*)_Jv_AllocBytes (static_size);
memset (static_data, 0, static_size);
for (int i = 0; i < clz->field_count; i++)
{
_Jv_Field *field = &clz->fields[i];
if ((field->flags & Modifier::STATIC) != 0)
{
field->u.addr = static_data + field->u.boffset;
if (clz->field_initializers[i] != 0)
{
_Jv_ResolveField (field, clz->loader);
_Jv_InitField (0, clz, i);
}
}
}
clz->field_initializers = 0;
}
for (int i = 0; i < clz->method_count; i++)
{
_Jv_MethodBase *imeth = clz->interpreted_methods[i];
if ((clz->methods[i].accflags & Modifier::NATIVE) != 0)
{
_Jv_JNIMethod *jnim = reinterpret_cast<_Jv_JNIMethod *> (imeth);
clz->methods[i].ncode = jnim->ncode ();
}
else if (imeth != 0) {
_Jv_InterpMethod *im = reinterpret_cast<_Jv_InterpMethod *> (imeth);
_Jv_VerifyMethod (im);
clz->methods[i].ncode = im->ncode ();
}
}
if ((clz->accflags & Modifier::INTERFACE))
{
clz->state = JV_STATE_PREPARED;
clz->notifyAll ();
return;
}
if ((clz->accflags & Modifier::ABSTRACT))
_Jv_PrepareMissingMethods (clz, clz);
clz->vtable_method_count = -1;
_Jv_MakeVTable (clz);
clz->state = JV_STATE_PREPARED;
clz->notifyAll ();
}
void
_Jv_InitField (jobject obj, jclass klass, int index)
{
using namespace java::lang::reflect;
if (obj != 0 && klass == 0)
klass = obj->getClass ();
if (!_Jv_IsInterpretedClass (klass))
return;
_Jv_InterpClass *clz = (_Jv_InterpClass*)klass;
_Jv_Field * field = (&clz->fields[0]) + index;
if (index > clz->field_count)
throw_internal_error ("field out of range");
int init = clz->field_initializers[index];
if (init == 0)
return;
_Jv_Constants *pool = &clz->constants;
int tag = pool->tags[init];
if (! field->isResolved ())
throw_internal_error ("initializing unresolved field");
if (obj==0 && ((field->flags & Modifier::STATIC) == 0))
throw_internal_error ("initializing non-static field with no object");
void *addr = 0;
if ((field->flags & Modifier::STATIC) != 0)
addr = (void*) field->u.addr;
else
addr = (void*) (((char*)obj) + field->u.boffset);
switch (tag)
{
case JV_CONSTANT_String:
{
_Jv_MonitorEnter (clz);
jstring str;
str = _Jv_NewStringUtf8Const (pool->data[init].utf8);
pool->data[init].string = str;
pool->tags[init] = JV_CONSTANT_ResolvedString;
_Jv_MonitorExit (clz);
}
case JV_CONSTANT_ResolvedString:
if (! (field->type == &StringClass
|| field->type == &java::lang::Class::class$))
throw_class_format_error ("string initialiser to non-string field");
*(jstring*)addr = pool->data[init].string;
break;
case JV_CONSTANT_Integer:
{
int value = pool->data[init].i;
if (field->type == JvPrimClass (boolean))
*(jboolean*)addr = (jboolean)value;
else if (field->type == JvPrimClass (byte))
*(jbyte*)addr = (jbyte)value;
else if (field->type == JvPrimClass (char))
*(jchar*)addr = (jchar)value;
else if (field->type == JvPrimClass (short))
*(jshort*)addr = (jshort)value;
else if (field->type == JvPrimClass (int))
*(jint*)addr = (jint)value;
else
throw_class_format_error ("erroneous field initializer");
}
break;
case JV_CONSTANT_Long:
if (field->type != JvPrimClass (long))
throw_class_format_error ("erroneous field initializer");
*(jlong*)addr = _Jv_loadLong (&pool->data[init]);
break;
case JV_CONSTANT_Float:
if (field->type != JvPrimClass (float))
throw_class_format_error ("erroneous field initializer");
*(jfloat*)addr = pool->data[init].f;
break;
case JV_CONSTANT_Double:
if (field->type != JvPrimClass (double))
throw_class_format_error ("erroneous field initializer");
*(jdouble*)addr = _Jv_loadDouble (&pool->data[init]);
break;
default:
throw_class_format_error ("erroneous field initializer");
}
}
static int
get_alignment_from_class (jclass klass)
{
if (klass == JvPrimClass (byte))
return __alignof__ (jbyte);
else if (klass == JvPrimClass (short))
return __alignof__ (jshort);
else if (klass == JvPrimClass (int))
return __alignof__ (jint);
else if (klass == JvPrimClass (long))
return __alignof__ (jlong);
else if (klass == JvPrimClass (boolean))
return __alignof__ (jboolean);
else if (klass == JvPrimClass (char))
return __alignof__ (jchar);
else if (klass == JvPrimClass (float))
return __alignof__ (jfloat);
else if (klass == JvPrimClass (double))
return __alignof__ (jdouble);
else
return __alignof__ (jobject);
}
inline static unsigned char*
skip_one_type (unsigned char* ptr)
{
int ch = *ptr++;
while (ch == '[')
{
ch = *ptr++;
}
if (ch == 'L')
{
do { ch = *ptr++; } while (ch != ';');
}
return ptr;
}
static ffi_type*
get_ffi_type_from_signature (unsigned char* ptr)
{
switch (*ptr)
{
case 'L':
case '[':
return &ffi_type_pointer;
break;
case 'Z':
if (sizeof (jboolean) == sizeof (jbyte))
return &ffi_type_sint8;
else
{
JvAssert (sizeof (jbyte) == sizeof (jint));
return &ffi_type_sint32;
}
break;
case 'B':
return &ffi_type_sint8;
break;
case 'C':
return &ffi_type_uint16;
break;
case 'S':
return &ffi_type_sint16;
break;
case 'I':
return &ffi_type_sint32;
break;
case 'J':
return &ffi_type_sint64;
break;
case 'F':
return &ffi_type_float;
break;
case 'D':
return &ffi_type_double;
break;
case 'V':
return &ffi_type_void;
break;
}
throw_internal_error ("unknown type in signature");
}
int
_Jv_count_arguments (_Jv_Utf8Const *signature,
jboolean staticp)
{
unsigned char *ptr = (unsigned char*) signature->data;
int arg_count = staticp ? 0 : 1;
ptr++;
while (*ptr != ')')
{
ptr = skip_one_type (ptr);
arg_count += 1;
}
return arg_count;
}
static int
init_cif (_Jv_Utf8Const* signature,
int arg_count,
jboolean staticp,
ffi_cif *cif,
ffi_type **arg_types,
ffi_type **rtype_p)
{
unsigned char *ptr = (unsigned char*) signature->data;
int arg_index = 0; int item_count = 0;
if (!staticp)
{
arg_types[arg_index++] = &ffi_type_pointer;
item_count += 1;
}
ptr++;
while (*ptr != ')')
{
arg_types[arg_index++] = get_ffi_type_from_signature (ptr);
if (*ptr == 'J' || *ptr == 'D')
item_count += 2;
else
item_count += 1;
ptr = skip_one_type (ptr);
}
ptr++;
ffi_type *rtype = get_ffi_type_from_signature (ptr);
ptr = skip_one_type (ptr);
if (ptr != (unsigned char*)signature->data + signature->length)
throw_internal_error ("did not find end of signature");
if (ffi_prep_cif (cif, FFI_DEFAULT_ABI,
arg_count, rtype, arg_types) != FFI_OK)
throw_internal_error ("ffi_prep_cif failed");
if (rtype_p != NULL)
*rtype_p = rtype;
return item_count;
}
#if FFI_NATIVE_RAW_API
# define FFI_PREP_RAW_CLOSURE ffi_prep_raw_closure
# define FFI_RAW_SIZE ffi_raw_size
#else
# define FFI_PREP_RAW_CLOSURE ffi_prep_java_raw_closure
# define FFI_RAW_SIZE ffi_java_raw_size
#endif
typedef struct {
ffi_raw_closure closure;
ffi_cif cif;
ffi_type *arg_types[0];
} ncode_closure;
typedef void (*ffi_closure_fun) (ffi_cif*,void*,ffi_raw*,void*);
void *
_Jv_InterpMethod::ncode ()
{
using namespace java::lang::reflect;
if (self->ncode != 0)
return self->ncode;
jboolean staticp = (self->accflags & Modifier::STATIC) != 0;
int arg_count = _Jv_count_arguments (self->signature, staticp);
ncode_closure *closure =
(ncode_closure*)_Jv_AllocBytes (sizeof (ncode_closure)
+ arg_count * sizeof (ffi_type*));
init_cif (self->signature,
arg_count,
staticp,
&closure->cif,
&closure->arg_types[0],
NULL);
ffi_closure_fun fun;
args_raw_size = FFI_RAW_SIZE (&closure->cif);
JvAssert ((self->accflags & Modifier::NATIVE) == 0);
if ((self->accflags & Modifier::SYNCHRONIZED) != 0)
{
if (staticp)
fun = (ffi_closure_fun)&_Jv_InterpMethod::run_synch_class;
else
fun = (ffi_closure_fun)&_Jv_InterpMethod::run_synch_object;
}
else
{
fun = (ffi_closure_fun)&_Jv_InterpMethod::run_normal;
}
FFI_PREP_RAW_CLOSURE (&closure->closure,
&closure->cif,
fun,
(void*)this);
self->ncode = (void*)closure;
return self->ncode;
}
void *
_Jv_JNIMethod::ncode ()
{
using namespace java::lang::reflect;
if (self->ncode != 0)
return self->ncode;
jboolean staticp = (self->accflags & Modifier::STATIC) != 0;
int arg_count = _Jv_count_arguments (self->signature, staticp);
ncode_closure *closure =
(ncode_closure*)_Jv_AllocBytes (sizeof (ncode_closure)
+ arg_count * sizeof (ffi_type*));
ffi_type *rtype;
init_cif (self->signature,
arg_count,
staticp,
&closure->cif,
&closure->arg_types[0],
&rtype);
ffi_closure_fun fun;
args_raw_size = FFI_RAW_SIZE (&closure->cif);
int extra_args = 1;
if ((self->accflags & Modifier::STATIC))
++extra_args;
jni_arg_types = (ffi_type **) _Jv_Malloc ((extra_args + arg_count)
* sizeof (ffi_type *));
int offset = 0;
jni_arg_types[offset++] = &ffi_type_pointer;
if ((self->accflags & Modifier::STATIC))
jni_arg_types[offset++] = &ffi_type_pointer;
memcpy (&jni_arg_types[offset], &closure->arg_types[0],
arg_count * sizeof (ffi_type *));
#ifdef WIN32
#define FFI_JNI_ABI FFI_STDCALL
#else
#define FFI_JNI_ABI FFI_DEFAULT_ABI
#endif
if (ffi_prep_cif (&jni_cif, FFI_JNI_ABI,
extra_args + arg_count, rtype,
jni_arg_types) != FFI_OK)
throw_internal_error ("ffi_prep_cif failed for JNI function");
JvAssert ((self->accflags & Modifier::NATIVE) != 0);
fun = (ffi_closure_fun) &_Jv_JNIMethod::call;
FFI_PREP_RAW_CLOSURE (&closure->closure,
&closure->cif,
fun,
(void*) this);
self->ncode = (void *) closure;
return self->ncode;
}
static _Jv_ResolvedMethod*
_Jv_BuildResolvedMethod (_Jv_Method* method,
jclass klass,
jboolean staticp,
jint vtable_index)
{
int arg_count = _Jv_count_arguments (method->signature, staticp);
_Jv_ResolvedMethod* result = (_Jv_ResolvedMethod*)
_Jv_AllocBytes (sizeof (_Jv_ResolvedMethod)
+ arg_count*sizeof (ffi_type*));
result->stack_item_count
= init_cif (method->signature,
arg_count,
staticp,
&result->cif,
&result->arg_types[0],
NULL);
result->vtable_index = vtable_index;
result->method = method;
result->klass = klass;
return result;
}
static void
throw_class_format_error (jstring msg)
{
throw (msg
? new java::lang::ClassFormatError (msg)
: new java::lang::ClassFormatError);
}
static void
throw_class_format_error (char *msg)
{
throw_class_format_error (JvNewStringLatin1 (msg));
}
static void
throw_internal_error (char *msg)
{
throw new java::lang::InternalError (JvNewStringLatin1 (msg));
}
#endif