// defineclass.cc - defining a class from .class format.
-/* Copyright (C) 1999 Cygnus Solutions
+/* Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005 Free Software Foundation
This file is part of libgcj.
currently being ignored ("InnerClasses", "LineNumber", etc...).
*/
-#include <java-interp.h>
+#include <config.h>
-#ifdef INTERPRETER
+#include <java-interp.h>
+#include <stdlib.h>
+#include <stdio.h>
#include <java-cpool.h>
-#include <cni.h>
+#include <gcj/cni.h>
+#include <execution.h>
#include <java/lang/Class.h>
#include <java/lang/Float.h>
#include <java/lang/ClassFormatError.h>
#include <java/lang/NoClassDefFoundError.h>
#include <java/lang/ClassCircularityError.h>
-#include <java/lang/ClassNotFoundException.h>
#include <java/lang/IncompatibleClassChangeError.h>
#include <java/lang/reflect/Modifier.h>
+#include <java/security/ProtectionDomain.h>
-#define ClassClass _CL_Q34java4lang5Class
-extern java::lang::Class ClassClass;
-#define StringClass _CL_Q34java4lang6String
-extern java::lang::Class StringClass;
-#define ClassObject _CL_Q34java4lang6Object
-extern java::lang::Class ClassObject;
-
-// we don't verify method names that match these.
-static _Jv_Utf8Const *clinit_name = _Jv_makeUtf8Const ("<clinit>", 8);
-static _Jv_Utf8Const *init_name = _Jv_makeUtf8Const ("<init>", 6);
+using namespace gcj;
+#ifdef INTERPRETER
-// these go in some seperate functions, to avoid having _Jv_InitClass
+// these go in some separate functions, to avoid having _Jv_InitClass
// inserted all over the place.
static void throw_internal_error (char *msg)
__attribute__ ((__noreturn__));
__attribute__ ((__noreturn__));
static void throw_class_format_error (jstring msg)
__attribute__ ((__noreturn__));
-static void throw_class_format_error (char *msg)
- __attribute__ ((__noreturn__));
static void throw_incompatible_class_change_error (jstring msg)
__attribute__ ((__noreturn__));
static void throw_class_circularity_error (jstring msg)
__attribute__ ((__noreturn__));
-static jdouble long_bits_to_double (jlong);
-static jfloat int_bits_to_float (jint);
-
/**
* We define class reading using a class. It is practical, since then
* the entire class-reader can be a friend of class Class (it needs to
* public or private members here.
*/
-struct _Jv_ClassReader {
+struct _Jv_ClassReader
+{
// do verification? Currently, there is no option to disable this.
// This flag just controls the verificaiton done by the class loader;
// allways on. You always want this as far as I can see, but it also
// controls weither identifiers and type descriptors/signatures are
// verified as legal. This could be somewhat more expensive since it
- // will call Characher.isJavaIdentifier{Start,Part} for each character
+ // will call Character.isJavaIdentifier{Start,Part} for each character
// in any identifier (field name or method name) it comes by. Thus,
// it might be useful to turn off this verification for classes that
// come from a trusted source. However, for GCJ, trusted classes are
unsigned int *offsets;
// the class to define (see java-interp.h)
- _Jv_InterpClass *def;
+ jclass def;
+
+ // the classes associated interpreter data.
+ _Jv_InterpClass *def_interp;
+
+ // The name we found.
+ _Jv_Utf8Const **found_name;
/* check that the given number of input bytes are available */
inline void check (int num)
throw_class_format_error ("erroneous constant pool tag");
}
- _Jv_ClassReader (jclass klass, jbyteArray data, jint offset, jint length)
+ inline void verify_identifier (_Jv_Utf8Const* name)
+ {
+ if (! _Jv_VerifyIdentifier (name))
+ throw_class_format_error ("erroneous identifier");
+ }
+
+ inline void verify_classname (unsigned char* ptr, _Jv_ushort length)
+ {
+ if (! _Jv_VerifyClassName (ptr, length))
+ throw_class_format_error ("erroneous class name");
+ }
+
+ inline void verify_classname (_Jv_Utf8Const *name)
+ {
+ if (! _Jv_VerifyClassName (name))
+ throw_class_format_error ("erroneous class name");
+ }
+
+ inline void verify_field_signature (_Jv_Utf8Const *sig)
+ {
+ if (! _Jv_VerifyFieldSignature (sig))
+ throw_class_format_error ("erroneous type descriptor");
+ }
+
+ inline void verify_method_signature (_Jv_Utf8Const *sig)
+ {
+ if (! _Jv_VerifyMethodSignature (sig))
+ throw_class_format_error ("erroneous type descriptor");
+ }
+
+ _Jv_ClassReader (jclass klass, jbyteArray data, jint offset, jint length,
+ java::security::ProtectionDomain *pd,
+ _Jv_Utf8Const **name_result)
{
if (klass == 0 || length < 0 || offset+length > data->length)
throw_internal_error ("arguments to _Jv_DefineClass");
bytes = (unsigned char*) (elements (data)+offset);
len = length;
pos = 0;
- def = (_Jv_InterpClass*) klass;
+ def = klass;
+ found_name = name_result;
+
+ def->size_in_bytes = -1;
+ def->vtable_method_count = -1;
+ def->engine = &_Jv_soleInterpreterEngine;
+ def->protectionDomain = pd;
}
/** and here goes the parser members defined out-of-line */
void read_one_method_attribute (int method);
void read_one_code_attribute (int method);
void read_one_field_attribute (int field);
+ void throw_class_format_error (char *msg);
/** check an utf8 entry, without creating a Utf8Const object */
bool is_attribute_name (int index, char *name);
*/
};
-/* This is used for the isJavaIdentifierStart & isJavaIdentifierPart
- methods, so we avoid doing _Jv_InitClass all the time */
-
-static const java::lang::Character *character = 0;
-static void prepare_character ();
-
+// Note that *NAME_RESULT will only be set if the class is registered
+// with the class loader. This is how the caller can know whether
+// unregistration is require.
void
-_Jv_DefineClass (jclass klass, jbyteArray data, jint offset, jint length)
+_Jv_DefineClass (jclass klass, jbyteArray data, jint offset, jint length,
+ java::security::ProtectionDomain *pd,
+ _Jv_Utf8Const **name_result)
{
- if (character == 0)
- prepare_character ();
-
- _Jv_ClassReader reader (klass, data, offset, length);
+ _Jv_ClassReader reader (klass, data, offset, length, pd, name_result);
reader.parse();
/* that's it! */
}
-/** put it after _Jv_DefineClass, so it doesn't get inlined */
-static void prepare_character ()
-{
- character = new java::lang::Character ('!');
-}
-
\f
/** This section defines the parsing/scanning of the class data */
handleClassBegin (access_flags, this_class, super_class);
+ // Allocate our aux_info here, after the name is set, to fulfill our
+ // contract with the collector interface.
+ def->aux_info = (void *) _Jv_AllocBytes (sizeof (_Jv_InterpClass));
+ def_interp = (_Jv_InterpClass *) def->aux_info;
+
int interfaces_count = read2u ();
-
+
handleInterfacesBegin (interfaces_count);
for (int i = 0; i < interfaces_count; i++)
if (pos != len)
throw_class_format_error ("unused data before end of file");
- // tell everyone we're done.
- def->state = JV_STATE_LOADED;
+ // Tell everyone we're done.
+ def->state = JV_STATE_READ;
+ if (gcj::verbose_class_flag)
+ _Jv_Linker::print_class_loaded (def);
def->notifyAll ();
-
}
void _Jv_ClassReader::read_constpool ()
{
- tags = (unsigned char*) _Jv_AllocBytesChecked (pool_count);
- offsets = (unsigned int *) _Jv_AllocBytesChecked (sizeof (int)
+ tags = (unsigned char*) _Jv_AllocBytes (pool_count);
+ offsets = (unsigned int *) _Jv_AllocBytes (sizeof (int)
* pool_count) ;
/** first, we scan the constant pool, collecting tags and offsets */
int name_index = read2u ();
int descriptor_index = read2u ();
int attributes_count = read2u ();
-
+
check_tag (name_index, JV_CONSTANT_Utf8);
prepare_pool_entry (name_index, JV_CONSTANT_Utf8);
check_tag (descriptor_index, JV_CONSTANT_Utf8);
prepare_pool_entry (descriptor_index, JV_CONSTANT_Utf8);
-
+
handleField (i, access_flags, name_index, descriptor_index);
-
+
for (int j = 0; j < attributes_count; j++)
{
read_one_field_attribute (i);
int attributes_count = read2u ();
check_tag (name_index, JV_CONSTANT_Utf8);
- prepare_pool_entry (descriptor_index, JV_CONSTANT_Utf8);
+ prepare_pool_entry (name_index, JV_CONSTANT_Utf8);
- check_tag (name_index, JV_CONSTANT_Utf8);
+ check_tag (descriptor_index, JV_CONSTANT_Utf8);
prepare_pool_entry (descriptor_index, JV_CONSTANT_Utf8);
-
+
handleMethod (i, access_flags, name_index,
descriptor_index);
-
+
for (int j = 0; j < attributes_count; j++)
{
read_one_method_attribute (i);
if (is_attribute_name (name, "Exceptions"))
{
- /* we ignore this for now */
- skip (length);
+ _Jv_Method *method = reinterpret_cast<_Jv_Method *>
+ (&def->methods[method_index]);
+ if (method->throws != NULL)
+ throw_class_format_error ("only one Exceptions attribute allowed per method");
+
+ int num_exceptions = read2u ();
+ _Jv_Utf8Const **exceptions =
+ (_Jv_Utf8Const **) _Jv_AllocBytes ((num_exceptions + 1)
+ * sizeof (_Jv_Utf8Const *));
+
+ int out = 0;
+ _Jv_word *pool_data = def->constants.data;
+ for (int i = 0; i < num_exceptions; ++i)
+ {
+ int ndx = read2u ();
+ // JLS 2nd Ed. 4.7.5 requires that the tag not be 0.
+ if (ndx != 0)
+ {
+ check_tag (ndx, JV_CONSTANT_Class);
+ exceptions[out++] = pool_data[ndx].utf8;
+ }
+ }
+ exceptions[out] = NULL;
+ method->throws = exceptions;
}
-
+
else if (is_attribute_name (name, "Code"))
{
int start_off = pos;
if (start_pc > end_pc
|| start_pc < 0
- || end_pc >= code_length
+ // END_PC can be equal to CODE_LENGTH.
+ // See JVM Spec 4.7.4.
+ || end_pc > code_length
|| handler_pc >= code_length)
throw_class_format_error ("erroneous exception handler info");
}
}
-void _Jv_ClassReader::read_one_code_attribute (int /*method*/)
+void _Jv_ClassReader::read_one_code_attribute (int method_index)
{
- /* ignore for now, ... later we may want to pick up
- line number information, for debugging purposes;
- in fact, the whole debugger issue is open! */
-
- /* int name = */ read2u ();
+ int name = read2u ();
int length = read4 ();
- skip (length);
-
+ if (is_attribute_name (name, "LineNumberTable"))
+ {
+ _Jv_InterpMethod *method = reinterpret_cast<_Jv_InterpMethod *>
+ (def_interp->interpreted_methods[method_index]);
+ if (method->line_table != NULL)
+ throw_class_format_error ("Method already has LineNumberTable");
+
+ int table_len = read2u ();
+ _Jv_LineTableEntry* table
+ = (_Jv_LineTableEntry *) JvAllocBytes (table_len
+ * sizeof (_Jv_LineTableEntry));
+ for (int i = 0; i < table_len; i++)
+ {
+ table[i].bytecode_pc = read2u ();
+ table[i].line = read2u ();
+ }
+ method->line_table_len = table_len;
+ method->line_table = table;
+ }
+ else
+ {
+ /* ignore unknown code attributes */
+ skip (length);
+ }
}
void _Jv_ClassReader::read_one_class_attribute ()
{
- /* we also ignore the class attributes, ...
- some day we'll add inner-classes support. */
-
- /* int name = */ read2u ();
+ int name = read2u ();
int length = read4 ();
- skip (length);
+ if (is_attribute_name (name, "SourceFile"))
+ {
+ int source_index = read2u ();
+ check_tag (source_index, JV_CONSTANT_Utf8);
+ prepare_pool_entry (source_index, JV_CONSTANT_Utf8);
+ def_interp->source_file_name = _Jv_NewStringUtf8Const
+ (def->constants.data[source_index].utf8);
+ }
+ else
+ {
+ /* Currently, we ignore most class attributes.
+ FIXME: Add inner-classes attributes support. */
+ skip (length);
+ }
}
/** now, we actually define the class' constant pool */
// the pool is scanned explicitly by the collector
- jbyte *pool_tags = (jbyte*) _Jv_AllocBytesChecked (pool_count);
+ jbyte *pool_tags = (jbyte*) _Jv_AllocBytes (pool_count);
_Jv_word *pool_data
- = (_Jv_word*) _Jv_AllocBytesChecked (pool_count * sizeof (_Jv_word));
+ = (_Jv_word*) _Jv_AllocBytes (pool_count * sizeof (_Jv_word));
def->constants.tags = pool_tags;
def->constants.data = pool_data;
// order to accomondate gcj's internal representation.
int len = get2u (this_data);
- char *buffer = (char*) alloca (len);
+ char *buffer = (char*) __builtin_alloca (len);
char *s = ((char*) this_data)+2;
/* FIXME: avoid using a buffer here */
prepare_pool_entry (utf_index, JV_CONSTANT_Utf8);
if (verify)
- _Jv_VerifyClassName (pool_data[utf_index].utf8);
+ verify_classname (pool_data[utf_index].utf8);
pool_data[index].utf8 = pool_data[utf_index].utf8;
pool_tags[index] = JV_CONSTANT_Class;
name_index, type_index);
if (this_tag == JV_CONSTANT_Fieldref)
- _Jv_VerifyFieldSignature (pool_data[type_index].utf8);
+ verify_field_signature (pool_data[type_index].utf8);
else
- _Jv_VerifyMethodSignature (pool_data[type_index].utf8);
+ verify_method_signature (pool_data[type_index].utf8);
_Jv_Utf8Const* name = pool_data[name_index].utf8;
|| _Jv_equalUtf8Consts (name, init_name)))
/* ignore */;
else
- _Jv_VerifyIdentifier (pool_data[name_index].utf8);
+ verify_identifier (pool_data[name_index].utf8);
}
_Jv_storeIndexes (&pool_data[index], class_index, nat_index);
case JV_CONSTANT_Float:
{
- jfloat f = int_bits_to_float ((jint) get4 (this_data));
+ jfloat f = java::lang::Float::intBitsToFloat ((jint) get4 (this_data));
_Jv_storeFloat (&pool_data[index], f);
pool_tags[index] = JV_CONSTANT_Float;
}
case JV_CONSTANT_Double:
{
- jdouble d = long_bits_to_double ((jlong) get8 (this_data));
+ jdouble d
+ = java::lang::Double::longBitsToDouble ((jlong) get8 (this_data));
_Jv_storeDouble (&pool_data[index], d);
pool_tags[index] = JV_CONSTANT_Double;
}
void
-_Jv_ClassReader::handleClassBegin
- (int access_flags, int this_class, int super_class)
+_Jv_ClassReader::handleClassBegin (int access_flags, int this_class, int super_class)
{
using namespace java::lang::reflect;
// was ClassLoader.defineClass called with an expected class name?
if (def->name == 0)
{
- jclass orig = _Jv_FindClassInCache (loadedName, def->loader);
+ jclass orig = def->loader->findLoadedClass(loadedName->toString());
if (orig == 0)
{
jstring msg = JvNewStringUTF ("loaded class ");
msg = msg->concat (def->getName ());
msg = msg->concat (_Jv_NewStringUTF (" was in fact named "));
- jstring klass_name = _Jv_NewStringUTF (loadedName->data);
+ jstring klass_name = loadedName->toString();
msg = msg->concat (klass_name);
throw_no_class_def_found_error (msg);
}
- def->accflags = access_flags;
+ def->accflags = access_flags | java::lang::reflect::Modifier::INTERPRETED;
pool_data[this_class].clazz = def;
pool_tags[this_class] = JV_CONSTANT_ResolvedClass;
if (super_class == 0)
{
- // interfaces have java.lang.Object as super.
- if (access_flags & Modifier::INTERFACE)
- {
- def->superclass = (jclass)&ClassObject;
- }
-
- // FIXME: Consider this carefully!
- else if (!_Jv_equalUtf8Consts (def->name, ClassObject.name))
- {
- throw_no_class_def_found_error ("loading java.lang.Object");
- }
+ // Note that this is ok if we are defining java.lang.Object.
+ // But there is no way to have this class be interpreted.
+ throw_class_format_error ("no superclass reference");
}
- // In the pre-loading state, it can be looked up in the
- // cache only by this thread! This allows the super-class
- // to include references to this class.
-
def->state = JV_STATE_PRELOADING;
- _Jv_RegisterClass (def);
+
+ // Register this class with its defining loader as well (despite the
+ // name of the function we're calling), so that super class lookups
+ // work properly. If there is an error, our caller will unregister
+ // this class from the class loader. Also, we don't need to hold a
+ // lock here, as our caller has acquired it.
+ _Jv_RegisterInitiatingLoader (def, def->loader);
+
+ // Note that we found a name so that unregistration can happen if
+ // needed.
+ *found_name = def->name;
if (super_class != 0)
{
- // load the super class
+ // Load the superclass.
check_tag (super_class, JV_CONSTANT_Class);
_Jv_Utf8Const* super_name = pool_data[super_class].utf8;
- // load the super class using our defining loader
- jclass the_super = _Jv_FindClass (super_name,
- def->loader);
+ // Load the superclass using our defining loader.
+ jclass the_super = _Jv_FindClass (super_name, def->loader);
// This will establish that we are allowed to be a subclass,
- // and check for class circularity error
+ // and check for class circularity error.
checkExtends (def, the_super);
- def->superclass = the_super;
+ // Note: for an interface we will find Object as the
+ // superclass. We still check it above to ensure class file
+ // validity, but we simply assign `null' to the actual field in
+ // this case.
+ def->superclass = (((access_flags & Modifier::INTERFACE))
+ ? NULL : the_super);
pool_data[super_class].clazz = the_super;
pool_tags[super_class] = JV_CONSTANT_ResolvedClass;
}
-
- // now we've come past the circularity problem, we can
- // now say that we're loading...
+
+ // Now we've come past the circularity problem, we can
+ // now say that we're loading.
def->state = JV_STATE_LOADING;
def->notifyAll ();
}
-///// implements the checks described in sect. 5.3.5.3
+///// Implements the checks described in sect. 5.3.5.3
void
_Jv_ClassReader::checkExtends (jclass sub, jclass super)
{
using namespace java::lang::reflect;
- // having an interface or a final class as a superclass is no good
+ _Jv_Linker::wait_for_state (super, JV_STATE_LOADING);
+
+ // Having an interface or a final class as a superclass is no good.
if ((super->accflags & (Modifier::INTERFACE | Modifier::FINAL)) != 0)
{
throw_incompatible_class_change_error (sub->getName ());
}
- // if the super class is not public, we need to check some more
+ // If the super class is not public, we need to check some more.
if ((super->accflags & Modifier::PUBLIC) == 0)
{
- // With package scope, the classes must have the same
- // class loader.
+ // With package scope, the classes must have the same class
+ // loader.
if ( sub->loader != super->loader
|| !_Jv_ClassNameSamePackage (sub->name, super->name))
{
}
}
- for (; super != 0; super = super->superclass)
+ for (; super != 0; super = super->getSuperclass ())
{
if (super == sub)
throw_class_circularity_error (sub->getName ());
void _Jv_ClassReader::handleInterfacesBegin (int count)
{
- def->interfaces = (jclass*) _Jv_AllocBytesChecked (count*sizeof (jclass));
+ def->interfaces = (jclass*) _Jv_AllocBytes (count*sizeof (jclass));
def->interface_count = count;
}
void _Jv_ClassReader::handleFieldsBegin (int count)
{
def->fields = (_Jv_Field*)
- _Jv_AllocBytesChecked (count * sizeof (_Jv_Field));
+ _Jv_AllocBytes (count * sizeof (_Jv_Field));
def->field_count = count;
- def->field_initializers = (_Jv_ushort*)
- _Jv_AllocBytesChecked (count * sizeof (_Jv_ushort));
+ def_interp->field_initializers = (_Jv_ushort*)
+ _Jv_AllocBytes (count * sizeof (_Jv_ushort));
for (int i = 0; i < count; i++)
- def->field_initializers[i] = (_Jv_ushort) 0;
+ def_interp->field_initializers[i] = (_Jv_ushort) 0;
}
void _Jv_ClassReader::handleField (int field_no,
_Jv_Field *field = &def->fields[field_no];
_Jv_Utf8Const *field_name = pool_data[name].utf8;
-#ifndef COMPACT_FIELDS
field->name = field_name;
-#else
- field->nameIndex = name;
-#endif
- if (verify)
- _Jv_VerifyIdentifier (field_name);
-
- // ignore flags we don't know about.
+ // Ignore flags we don't know about.
field->flags = flags & Modifier::ALL_FLAGS;
+ _Jv_Utf8Const* sig = pool_data[desc].utf8;
+
if (verify)
{
- if (field->flags & (Modifier::SYNCHRONIZED
- | Modifier::NATIVE
- | Modifier::INTERFACE
- | Modifier::ABSTRACT))
- throw_class_format_error ("erroneous field access flags");
-
+ verify_identifier (field_name);
+
+ for (int i = 0; i < field_no; ++i)
+ {
+ if (_Jv_equalUtf8Consts (field_name, def->fields[i].name)
+ && _Jv_equalUtf8Consts (sig,
+ // We know the other fields are
+ // unresolved.
+ (_Jv_Utf8Const *) def->fields[i].type))
+ throw_class_format_error ("duplicate field name");
+ }
+
+ // At most one of PUBLIC, PRIVATE, or PROTECTED is allowed.
if (1 < ( ((field->flags & Modifier::PUBLIC) ? 1 : 0)
+((field->flags & Modifier::PRIVATE) ? 1 : 0)
+((field->flags & Modifier::PROTECTED) ? 1 : 0)))
throw_class_format_error ("erroneous field access flags");
- }
- _Jv_Utf8Const* sig = pool_data[desc].utf8;
+ // FIXME: JVM spec S4.5: Verify ACC_FINAL and ACC_VOLATILE are not
+ // both set. Verify modifiers for interface fields.
+
+ }
if (verify)
- _Jv_VerifyFieldSignature (sig);
+ verify_field_signature (sig);
// field->type is really a jclass, but while it is still
// unresolved we keep an _Jv_Utf8Const* instead.
throw_class_format_error ("field has multiple ConstantValue attributes");
field->flags |= _Jv_FIELD_CONSTANT_VALUE;
- def->field_initializers[field_index] = value;
+ def_interp->field_initializers[field_index] = value;
/* type check the initializer */
int low = 0;
int high = def->field_count-1;
_Jv_Field *fields = def->fields;
- _Jv_ushort *inits = def->field_initializers;
+ _Jv_ushort *inits = def_interp->field_initializers;
// this is kind of a raw version of quicksort.
while (low < high)
-void _Jv_ClassReader::handleMethodsBegin (int count)
+void
+_Jv_ClassReader::handleMethodsBegin (int count)
{
- def->methods = (_Jv_Method*)
- _Jv_AllocBytesChecked (sizeof (_Jv_Method)*count);
+ def->methods = (_Jv_Method *) _Jv_AllocBytes (sizeof (_Jv_Method) * count);
- def->interpreted_methods = (_Jv_InterpMethod**)
- _Jv_AllocBytesChecked (sizeof (_Jv_InterpMethod*) * count);
+ def_interp->interpreted_methods
+ = (_Jv_MethodBase **) _Jv_AllocBytes (sizeof (_Jv_MethodBase *)
+ * count);
for (int i = 0; i < count; i++)
- def->interpreted_methods[i] = 0;
+ {
+ def_interp->interpreted_methods[i] = 0;
+ def->methods[i].index = (_Jv_ushort) -1;
+ }
def->method_count = count;
}
// ignore unknown flags
method->accflags = accflags & Modifier::ALL_FLAGS;
- // intialize...
+ // Initialize...
method->ncode = 0;
+ method->throws = NULL;
if (verify)
{
|| _Jv_equalUtf8Consts (method->name, init_name))
/* ignore */;
else
- _Jv_VerifyIdentifier (method->name);
+ verify_identifier (method->name);
- _Jv_VerifyMethodSignature (method->signature);
+ verify_method_signature (method->signature);
- if (method->accflags & (Modifier::VOLATILE
- | Modifier::TRANSIENT
- | Modifier::INTERFACE))
- throw_class_format_error ("erroneous method access flags");
-
+ for (int i = 0; i < mth_index; ++i)
+ {
+ if (_Jv_equalUtf8Consts (method->name, def->methods[i].name)
+ && _Jv_equalUtf8Consts (method->signature,
+ def->methods[i].signature))
+ throw_class_format_error ("duplicate method");
+ }
+
+ // At most one of PUBLIC, PRIVATE, or PROTECTED is allowed.
if (1 < ( ((method->accflags & Modifier::PUBLIC) ? 1 : 0)
+((method->accflags & Modifier::PRIVATE) ? 1 : 0)
+((method->accflags & Modifier::PROTECTED) ? 1 : 0)))
throw_class_format_error ("erroneous method access flags");
+
+ // FIXME: JVM spec S4.6: if ABSTRACT modifier is set, verify other
+ // flags are not set. Verify flags for interface methods. Verify
+ // modifiers for initializers.
}
}
{
int size = _Jv_InterpMethod::size (exc_table_length, code_length);
_Jv_InterpMethod *method =
- (_Jv_InterpMethod*) (_Jv_AllocBytesChecked (size));
+ (_Jv_InterpMethod*) (_Jv_AllocBytes (size));
method->max_stack = max_stack;
method->max_locals = max_locals;
method->exc_count = exc_table_length;
method->defining_class = def;
method->self = &def->methods[method_index];
+ method->prepared = NULL;
+ method->line_table_len = 0;
+ method->line_table = NULL;
+
// grab the byte code!
memcpy ((void*) method->bytecode (),
(void*) (bytes+code_start),
code_length);
-
- def->interpreted_methods[method_index] = method;
- /* that's all we do for now */
+ def_interp->interpreted_methods[method_index] = method;
+
+ if ((method->self->accflags & java::lang::reflect::Modifier::STATIC))
+ {
+ // Precompute the ncode field for a static method. This lets us
+ // call a static method of an interpreted class from precompiled
+ // code without first resolving the class (that will happen
+ // during class initialization instead).
+ method->self->ncode = method->ncode ();
+ }
}
-void _Jv_ClassReader::handleExceptionTableEntry
+void _Jv_ClassReader::handleExceptionTableEntry
(int method_index, int exc_index,
int start_pc, int end_pc, int handler_pc, int catch_type)
{
- _Jv_InterpMethod *method = def->interpreted_methods[method_index];
+ _Jv_InterpMethod *method = reinterpret_cast<_Jv_InterpMethod *>
+ (def_interp->interpreted_methods[method_index]);
_Jv_InterpException *exc = method->exceptions ();
- exc[exc_index].start_pc = start_pc;
- exc[exc_index].end_pc = end_pc;
- exc[exc_index].handler_pc = handler_pc;
- exc[exc_index].handler_type = catch_type;
+ exc[exc_index].start_pc.i = start_pc;
+ exc[exc_index].end_pc.i = end_pc;
+ exc[exc_index].handler_pc.i = handler_pc;
+ exc[exc_index].handler_type.i = catch_type;
}
void _Jv_ClassReader::handleMethodsEnd ()
for (int i = 0; i < def->method_count; i++)
{
_Jv_Method *method = &def->methods[i];
- if (method->accflags & (Modifier::NATIVE | Modifier::ABSTRACT))
+ if ((method->accflags & Modifier::NATIVE) != 0)
{
- if (def->interpreted_methods[i] != 0)
- throw_class_format_error ("code provided "
- "for abstract or native method");
+ if (def_interp->interpreted_methods[i] != 0)
+ throw_class_format_error ("code provided for native method");
+ else
+ {
+ _Jv_JNIMethod *m = (_Jv_JNIMethod *)
+ _Jv_AllocBytes (sizeof (_Jv_JNIMethod));
+ m->defining_class = def;
+ m->self = method;
+ m->function = NULL;
+ def_interp->interpreted_methods[i] = m;
+
+ if ((method->accflags & Modifier::STATIC))
+ {
+ // Precompute the ncode field for a static method.
+ // This lets us call a static method of an
+ // interpreted class from precompiled code without
+ // first resolving the class (that will happen
+ // during class initialization instead).
+ method->ncode = m->ncode ();
+ }
+ }
+ }
+ else if ((method->accflags & Modifier::ABSTRACT) != 0)
+ {
+ if (def_interp->interpreted_methods[i] != 0)
+ throw_class_format_error ("code provided for abstract method");
+ method->ncode = (void *) &_Jv_ThrowAbstractMethodError;
}
else
{
- if (def->interpreted_methods[i] == 0)
- throw_class_format_error ("abstract or native method "
- "with no code");
+ if (def_interp->interpreted_methods[i] == 0)
+ throw_class_format_error ("method with no code");
+ }
+ }
+}
+
+void _Jv_ClassReader::throw_class_format_error (char *msg)
+{
+ jstring str;
+ if (def->name != NULL)
+ {
+ jsize mlen = strlen (msg);
+ unsigned char* data = (unsigned char*) def->name->chars();
+ int ulen = def->name->len();
+ unsigned char* limit = data + ulen;
+ jsize nlen = _Jv_strLengthUtf8 ((char *) data, ulen);
+ jsize len = nlen + mlen + 3;
+ str = JvAllocString(len);
+ jchar *chrs = JvGetStringChars(str);
+ while (data < limit)
+ *chrs++ = UTF8_GET(data, limit);
+ *chrs++ = ' ';
+ *chrs++ = '(';
+ for (;;)
+ {
+ char c = *msg++;
+ if (c == 0)
+ break;
+ *chrs++ = c & 0xFFFF;
}
+ *chrs++ = ')';
}
+ else
+ str = JvNewStringLatin1 (msg);
+ ::throw_class_format_error (str);
+}
+\f
+/** Here we define the exceptions that can be thrown */
+
+static void
+throw_no_class_def_found_error (jstring msg)
+{
+ throw (msg
+ ? new java::lang::NoClassDefFoundError (msg)
+ : new java::lang::NoClassDefFoundError);
+}
+
+static void
+throw_no_class_def_found_error (char *msg)
+{
+ throw_no_class_def_found_error (JvNewStringLatin1 (msg));
+}
+
+static void
+throw_class_format_error (jstring msg)
+{
+ throw (msg
+ ? new java::lang::ClassFormatError (msg)
+ : new java::lang::ClassFormatError);
+}
+
+static void
+throw_internal_error (char *msg)
+{
+ throw new java::lang::InternalError (JvNewStringLatin1 (msg));
+}
+
+static void
+throw_incompatible_class_change_error (jstring msg)
+{
+ throw new java::lang::IncompatibleClassChangeError (msg);
+}
+static void
+throw_class_circularity_error (jstring msg)
+{
+ throw new java::lang::ClassCircularityError (msg);
}
+#endif /* INTERPRETER */
+
\f
+
/** This section takes care of verifying integrity of identifiers,
signatures, field ddescriptors, and class names */
int xxch = UTF8_GET(PTR,LIMIT); \
PTR = xxkeep; xxch; })
-/* verify one element of a type descriptor or signature */
+/* Verify one element of a type descriptor or signature. */
static unsigned char*
_Jv_VerifyOne (unsigned char* ptr, unsigned char* limit, bool void_ok)
{
switch (ch)
{
case 'V':
- if (! void_ok) return 0;
+ if (! void_ok)
+ return 0;
case 'S': case 'B': case 'I': case 'J':
case 'Z': case 'C': case 'F': case 'D':
case 'L':
{
unsigned char *start = ptr, *end;
- do {
- if (ptr > limit)
- return 0;
-
- end = ptr;
-
- if ((ch = UTF8_GET (ptr, limit)) == -1)
- return 0;
-
- } while (ch != ';');
- _Jv_VerifyClassName (start, (unsigned short) (end-start));
+ do
+ {
+ if (ptr > limit)
+ return 0;
+
+ end = ptr;
+
+ if ((ch = UTF8_GET (ptr, limit)) == -1)
+ return 0;
+
+ }
+ while (ch != ';');
+ if (! _Jv_VerifyClassName (start, (unsigned short) (end-start)))
+ return 0;
}
break;
case '[':
return _Jv_VerifyOne (ptr, limit, false);
break;
-
+
default:
return 0;
}
return ptr;
-
}
-
-/** verification and loading procedures **/
-
-void
+/* Verification and loading procedures. */
+bool
_Jv_VerifyFieldSignature (_Jv_Utf8Const*sig)
{
- unsigned char* ptr = (unsigned char*) sig->data;
- unsigned char* limit = ptr + sig->length;
+ unsigned char* ptr = (unsigned char*) sig->chars();
+ unsigned char* limit = ptr + sig->len();
ptr = _Jv_VerifyOne (ptr, limit, false);
- if (ptr != limit)
- throw_class_format_error ("erroneous type descriptor");
+ return ptr == limit;
}
-void
+bool
_Jv_VerifyMethodSignature (_Jv_Utf8Const*sig)
{
- unsigned char* ptr = (unsigned char*) sig->data;
- unsigned char* limit = ptr + sig->length;
-
- if (ptr == limit)
- throw_class_format_error ("erroneous type descriptor");
+ unsigned char* ptr = (unsigned char*) sig->chars();
+ unsigned char* limit = ptr + sig->len();
- if (UTF8_GET(ptr,limit) != '(')
- throw_class_format_error ("erroneous type descriptor");
+ if (ptr == limit || UTF8_GET(ptr,limit) != '(')
+ return false;
while (ptr && UTF8_PEEK (ptr, limit) != ')')
ptr = _Jv_VerifyOne (ptr, limit, false);
-
- if (UTF8_GET (ptr, limit) != ')')
- throw_class_format_error ("erroneous type descriptor");
+
+ if (! ptr || UTF8_GET (ptr, limit) != ')')
+ return false;
// get the return type
ptr = _Jv_VerifyOne (ptr, limit, true);
- if (ptr != limit)
- throw_class_format_error ("erroneous type descriptor");
-
- return;
-
+ return ptr == limit;
}
-/* we try to avoid calling the Character methods all the time,
- in fact, they will only be called for non-standard things */
-
+/* We try to avoid calling the Character methods all the time, in
+ fact, they will only be called for non-standard things. */
static __inline__ int
is_identifier_start (int c)
{
if (ch == 0x5FU) /* _ */
return 1;
- return character->isJavaIdentifierStart ((jchar) ch);
+ return java::lang::Character::isJavaIdentifierStart ((jchar) ch);
}
static __inline__ int
if (ch == 0x5FU || ch == 0x24U) /* _ $ */
return 1;
- return character->isJavaIdentifierStart ((jchar) ch);
+ return java::lang::Character::isJavaIdentifierStart ((jchar) ch);
}
-void
+bool
_Jv_VerifyIdentifier (_Jv_Utf8Const* name)
{
- unsigned char *ptr = (unsigned char*) name->data;
- unsigned char *limit = ptr + name->length;
+ unsigned char *ptr = (unsigned char*) name->chars();
+ unsigned char *limit = (unsigned char*) name->limit();
int ch;
if ((ch = UTF8_GET (ptr, limit))==-1
|| ! is_identifier_start (ch))
- throw_class_format_error ("erroneous identifier");
+ return false;
while (ptr != limit)
{
if ((ch = UTF8_GET (ptr, limit))==-1
|| ! is_identifier_part (ch))
- throw_class_format_error ("erroneous identifier");
+ return false;
}
+ return true;
}
-
-void
+bool
_Jv_VerifyClassName (unsigned char* ptr, _Jv_ushort length)
{
unsigned char *limit = ptr+length;
if ('[' == UTF8_PEEK (ptr, limit))
{
- if (! _Jv_VerifyOne (++ptr, limit, false))
- throw_class_format_error ("erroneous class name");
+ unsigned char *end = _Jv_VerifyOne (++ptr, limit, false);
+ // _Jv_VerifyOne must leave us looking at the terminating nul
+ // byte.
+ if (! end || *end)
+ return false;
else
- return;
+ return true;
}
next_level:
- do {
+ for (;;) {
if ((ch = UTF8_GET (ptr, limit))==-1)
- throw_class_format_error ("erroneous class name");
+ return false;
if (! is_identifier_start (ch))
- throw_class_format_error ("erroneous class name");
- do {
+ return false;
+ for (;;) {
if (ptr == limit)
- return;
+ return true;
else if ((ch = UTF8_GET (ptr, limit))==-1)
- throw_class_format_error ("erroneous class name");
+ return false;
else if (ch == '.')
goto next_level;
else if (! is_identifier_part (ch))
- throw_class_format_error ("erroneous class name");
- } while (true);
- } while (true);
-
+ return false;
+ }
+ }
}
-void
+bool
_Jv_VerifyClassName (_Jv_Utf8Const *name)
{
- _Jv_VerifyClassName ((unsigned char*)&name->data[0],
- (_Jv_ushort) name->length);
+ return _Jv_VerifyClassName ((unsigned char*)name->chars(), name->len());
}
-
-/** returns true, if name1 and name2 represents classes in the same
- package. */
-
+/* Returns true, if NAME1 and NAME2 represent classes in the same
+ package. Neither NAME2 nor NAME2 may name an array type. */
bool
_Jv_ClassNameSamePackage (_Jv_Utf8Const *name1, _Jv_Utf8Const *name2)
{
- unsigned char* ptr1 = (unsigned char*) name1->data;
- unsigned char* limit1 = ptr1 + name1->length;
+ unsigned char* ptr1 = (unsigned char*) name1->chars();
+ unsigned char* limit1 = (unsigned char*) name1->limit();
unsigned char* last1 = ptr1;
if (ch1 == '.')
last1 = ptr1;
-
+
else if (ch1 == -1)
return false;
}
- // now the length of name1's package name is len
- int len = last1 - (unsigned char*) name1->data;
+ // Now the length of NAME1's package name is LEN.
+ int len = last1 - (unsigned char*) name1->chars();
- // if this is longer than name2, then we're off
- if (len > name2->length)
+ // If this is longer than NAME2, then we're off.
+ if (len > name2->len())
return false;
- // then compare the first len bytes for equality
- if (memcmp ((void*) name1->data, (void*) name2->data, len) == 0)
+ // Then compare the first len bytes for equality.
+ if (memcmp ((void*) name1->chars(), (void*) name2->chars(), len) == 0)
{
- // check that there are no .'s after position len in name2
+ // Check that there are no .'s after position LEN in NAME2.
- unsigned char* ptr2 = (unsigned char*) name2->data + len;
- unsigned char* limit2 =
- (unsigned char*) name2->data + name2->length;
+ unsigned char* ptr2 = (unsigned char*) name2->chars() + len;
+ unsigned char* limit2 = (unsigned char*) name2->limit();
while (ptr2 < limit2)
{
}
return false;
}
-
-
-\f
-/** Here we define the exceptions that can be thrown */
-
-static void
-throw_no_class_def_found_error (jstring msg)
-{
- if (msg == 0)
- JvThrow (new java::lang::NoClassDefFoundError);
- else
- JvThrow (new java::lang::NoClassDefFoundError (msg));
-}
-
-static void
-throw_no_class_def_found_error (char *msg)
-{
- throw_no_class_def_found_error (JvNewStringLatin1 (msg));
-}
-
-static void
-throw_class_format_error (jstring msg)
-{
- if (msg == 0)
- JvThrow (new java::lang::ClassFormatError);
- else
- JvThrow (new java::lang::ClassFormatError (msg));
-}
-
-static void
-throw_class_format_error (char *msg)
-{
- throw_class_format_error (JvNewStringLatin1 (msg));
-}
-
-static void
-throw_internal_error (char *msg)
-{
- JvThrow
- (new java::lang::InternalError (JvNewStringLatin1 (msg)));
-}
-
-static jfloat int_bits_to_float (jint value)
-{
- return java::lang::Float::intBitsToFloat (value);
-}
-
-static jdouble long_bits_to_double (jlong value)
-{
- return java::lang::Double::longBitsToDouble (value);
-}
-
-static void throw_incompatible_class_change_error (jstring msg)
-{
- JvThrow (new java::lang::IncompatibleClassChangeError (msg));
-}
-
-static void throw_class_circularity_error (jstring msg)
-{
- JvThrow (new java::lang::ClassCircularityError (msg));
-}
-
-#endif /* INTERPRETER */
-
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