--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/share/vm/classfile/classFileParser.cpp Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,4014 @@
+/*
+ * Copyright 1997-2007 Sun Microsystems, Inc. All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ */
+
+#include "incls/_precompiled.incl"
+#include "incls/_classFileParser.cpp.incl"
+
+// We generally try to create the oops directly when parsing, rather than allocating
+// temporary data structures and copying the bytes twice. A temporary area is only
+// needed when parsing utf8 entries in the constant pool and when parsing line number
+// tables.
+
+// We add assert in debug mode when class format is not checked.
+
+#define JAVA_CLASSFILE_MAGIC 0xCAFEBABE
+#define JAVA_MIN_SUPPORTED_VERSION 45
+#define JAVA_MAX_SUPPORTED_VERSION 50
+#define JAVA_MAX_SUPPORTED_MINOR_VERSION 0
+
+// Used for two backward compatibility reasons:
+// - to check for new additions to the class file format in JDK1.5
+// - to check for bug fixes in the format checker in JDK1.5
+#define JAVA_1_5_VERSION 49
+
+// Used for backward compatibility reasons:
+// - to check for javac bug fixes that happened after 1.5
+#define JAVA_6_VERSION 50
+
+
+void ClassFileParser::parse_constant_pool_entries(constantPoolHandle cp, int length, TRAPS) {
+ // Use a local copy of ClassFileStream. It helps the C++ compiler to optimize
+ // this function (_current can be allocated in a register, with scalar
+ // replacement of aggregates). The _current pointer is copied back to
+ // stream() when this function returns. DON'T call another method within
+ // this method that uses stream().
+ ClassFileStream* cfs0 = stream();
+ ClassFileStream cfs1 = *cfs0;
+ ClassFileStream* cfs = &cfs1;
+#ifdef ASSERT
+ u1* old_current = cfs0->current();
+#endif
+
+ // Used for batching symbol allocations.
+ const char* names[SymbolTable::symbol_alloc_batch_size];
+ int lengths[SymbolTable::symbol_alloc_batch_size];
+ int indices[SymbolTable::symbol_alloc_batch_size];
+ unsigned int hashValues[SymbolTable::symbol_alloc_batch_size];
+ int names_count = 0;
+
+ // parsing Index 0 is unused
+ for (int index = 1; index < length; index++) {
+ // Each of the following case guarantees one more byte in the stream
+ // for the following tag or the access_flags following constant pool,
+ // so we don't need bounds-check for reading tag.
+ u1 tag = cfs->get_u1_fast();
+ switch (tag) {
+ case JVM_CONSTANT_Class :
+ {
+ cfs->guarantee_more(3, CHECK); // name_index, tag/access_flags
+ u2 name_index = cfs->get_u2_fast();
+ cp->klass_index_at_put(index, name_index);
+ }
+ break;
+ case JVM_CONSTANT_Fieldref :
+ {
+ cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
+ u2 class_index = cfs->get_u2_fast();
+ u2 name_and_type_index = cfs->get_u2_fast();
+ cp->field_at_put(index, class_index, name_and_type_index);
+ }
+ break;
+ case JVM_CONSTANT_Methodref :
+ {
+ cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
+ u2 class_index = cfs->get_u2_fast();
+ u2 name_and_type_index = cfs->get_u2_fast();
+ cp->method_at_put(index, class_index, name_and_type_index);
+ }
+ break;
+ case JVM_CONSTANT_InterfaceMethodref :
+ {
+ cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
+ u2 class_index = cfs->get_u2_fast();
+ u2 name_and_type_index = cfs->get_u2_fast();
+ cp->interface_method_at_put(index, class_index, name_and_type_index);
+ }
+ break;
+ case JVM_CONSTANT_String :
+ {
+ cfs->guarantee_more(3, CHECK); // string_index, tag/access_flags
+ u2 string_index = cfs->get_u2_fast();
+ cp->string_index_at_put(index, string_index);
+ }
+ break;
+ case JVM_CONSTANT_Integer :
+ {
+ cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
+ u4 bytes = cfs->get_u4_fast();
+ cp->int_at_put(index, (jint) bytes);
+ }
+ break;
+ case JVM_CONSTANT_Float :
+ {
+ cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
+ u4 bytes = cfs->get_u4_fast();
+ cp->float_at_put(index, *(jfloat*)&bytes);
+ }
+ break;
+ case JVM_CONSTANT_Long :
+ // A mangled type might cause you to overrun allocated memory
+ guarantee_property(index+1 < length,
+ "Invalid constant pool entry %u in class file %s",
+ index, CHECK);
+ {
+ cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
+ u8 bytes = cfs->get_u8_fast();
+ cp->long_at_put(index, bytes);
+ }
+ index++; // Skip entry following eigth-byte constant, see JVM book p. 98
+ break;
+ case JVM_CONSTANT_Double :
+ // A mangled type might cause you to overrun allocated memory
+ guarantee_property(index+1 < length,
+ "Invalid constant pool entry %u in class file %s",
+ index, CHECK);
+ {
+ cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
+ u8 bytes = cfs->get_u8_fast();
+ cp->double_at_put(index, *(jdouble*)&bytes);
+ }
+ index++; // Skip entry following eigth-byte constant, see JVM book p. 98
+ break;
+ case JVM_CONSTANT_NameAndType :
+ {
+ cfs->guarantee_more(5, CHECK); // name_index, signature_index, tag/access_flags
+ u2 name_index = cfs->get_u2_fast();
+ u2 signature_index = cfs->get_u2_fast();
+ cp->name_and_type_at_put(index, name_index, signature_index);
+ }
+ break;
+ case JVM_CONSTANT_Utf8 :
+ {
+ cfs->guarantee_more(2, CHECK); // utf8_length
+ u2 utf8_length = cfs->get_u2_fast();
+ u1* utf8_buffer = cfs->get_u1_buffer();
+ assert(utf8_buffer != NULL, "null utf8 buffer");
+ // Got utf8 string, guarantee utf8_length+1 bytes, set stream position forward.
+ cfs->guarantee_more(utf8_length+1, CHECK); // utf8 string, tag/access_flags
+ cfs->skip_u1_fast(utf8_length);
+ // Before storing the symbol, make sure it's legal
+ if (_need_verify) {
+ verify_legal_utf8((unsigned char*)utf8_buffer, utf8_length, CHECK);
+ }
+
+ unsigned int hash;
+ symbolOop result = SymbolTable::lookup_only((char*)utf8_buffer, utf8_length, hash);
+ if (result == NULL) {
+ names[names_count] = (char*)utf8_buffer;
+ lengths[names_count] = utf8_length;
+ indices[names_count] = index;
+ hashValues[names_count++] = hash;
+ if (names_count == SymbolTable::symbol_alloc_batch_size) {
+ oopFactory::new_symbols(cp, names_count, names, lengths, indices, hashValues, CHECK);
+ names_count = 0;
+ }
+ } else {
+ cp->symbol_at_put(index, result);
+ }
+ }
+ break;
+ default:
+ classfile_parse_error(
+ "Unknown constant tag %u in class file %s", tag, CHECK);
+ break;
+ }
+ }
+
+ // Allocate the remaining symbols
+ if (names_count > 0) {
+ oopFactory::new_symbols(cp, names_count, names, lengths, indices, hashValues, CHECK);
+ }
+
+ // Copy _current pointer of local copy back to stream().
+#ifdef ASSERT
+ assert(cfs0->current() == old_current, "non-exclusive use of stream()");
+#endif
+ cfs0->set_current(cfs1.current());
+}
+
+bool inline valid_cp_range(int index, int length) { return (index > 0 && index < length); }
+
+constantPoolHandle ClassFileParser::parse_constant_pool(TRAPS) {
+ ClassFileStream* cfs = stream();
+ constantPoolHandle nullHandle;
+
+ cfs->guarantee_more(3, CHECK_(nullHandle)); // length, first cp tag
+ u2 length = cfs->get_u2_fast();
+ guarantee_property(
+ length >= 1, "Illegal constant pool size %u in class file %s",
+ length, CHECK_(nullHandle));
+ constantPoolOop constant_pool =
+ oopFactory::new_constantPool(length, CHECK_(nullHandle));
+ constantPoolHandle cp (THREAD, constant_pool);
+
+ cp->set_partially_loaded(); // Enables heap verify to work on partial constantPoolOops
+
+ // parsing constant pool entries
+ parse_constant_pool_entries(cp, length, CHECK_(nullHandle));
+
+ int index = 1; // declared outside of loops for portability
+
+ // first verification pass - validate cross references and fixup class and string constants
+ for (index = 1; index < length; index++) { // Index 0 is unused
+ switch (cp->tag_at(index).value()) {
+ case JVM_CONSTANT_Class :
+ ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
+ break;
+ case JVM_CONSTANT_Fieldref :
+ // fall through
+ case JVM_CONSTANT_Methodref :
+ // fall through
+ case JVM_CONSTANT_InterfaceMethodref : {
+ if (!_need_verify) break;
+ int klass_ref_index = cp->klass_ref_index_at(index);
+ int name_and_type_ref_index = cp->name_and_type_ref_index_at(index);
+ check_property(valid_cp_range(klass_ref_index, length) &&
+ cp->tag_at(klass_ref_index).is_klass_reference(),
+ "Invalid constant pool index %u in class file %s",
+ klass_ref_index,
+ CHECK_(nullHandle));
+ check_property(valid_cp_range(name_and_type_ref_index, length) &&
+ cp->tag_at(name_and_type_ref_index).is_name_and_type(),
+ "Invalid constant pool index %u in class file %s",
+ name_and_type_ref_index,
+ CHECK_(nullHandle));
+ break;
+ }
+ case JVM_CONSTANT_String :
+ ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present
+ break;
+ case JVM_CONSTANT_Integer :
+ break;
+ case JVM_CONSTANT_Float :
+ break;
+ case JVM_CONSTANT_Long :
+ case JVM_CONSTANT_Double :
+ index++;
+ check_property(
+ (index < length && cp->tag_at(index).is_invalid()),
+ "Improper constant pool long/double index %u in class file %s",
+ index, CHECK_(nullHandle));
+ break;
+ case JVM_CONSTANT_NameAndType : {
+ if (!_need_verify) break;
+ int name_ref_index = cp->name_ref_index_at(index);
+ int signature_ref_index = cp->signature_ref_index_at(index);
+ check_property(
+ valid_cp_range(name_ref_index, length) &&
+ cp->tag_at(name_ref_index).is_utf8(),
+ "Invalid constant pool index %u in class file %s",
+ name_ref_index, CHECK_(nullHandle));
+ check_property(
+ valid_cp_range(signature_ref_index, length) &&
+ cp->tag_at(signature_ref_index).is_utf8(),
+ "Invalid constant pool index %u in class file %s",
+ signature_ref_index, CHECK_(nullHandle));
+ break;
+ }
+ case JVM_CONSTANT_Utf8 :
+ break;
+ case JVM_CONSTANT_UnresolvedClass : // fall-through
+ case JVM_CONSTANT_UnresolvedClassInError:
+ ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
+ break;
+ case JVM_CONSTANT_ClassIndex :
+ {
+ int class_index = cp->klass_index_at(index);
+ check_property(
+ valid_cp_range(class_index, length) &&
+ cp->tag_at(class_index).is_utf8(),
+ "Invalid constant pool index %u in class file %s",
+ class_index, CHECK_(nullHandle));
+ cp->unresolved_klass_at_put(index, cp->symbol_at(class_index));
+ }
+ break;
+ case JVM_CONSTANT_UnresolvedString :
+ ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present
+ break;
+ case JVM_CONSTANT_StringIndex :
+ {
+ int string_index = cp->string_index_at(index);
+ check_property(
+ valid_cp_range(string_index, length) &&
+ cp->tag_at(string_index).is_utf8(),
+ "Invalid constant pool index %u in class file %s",
+ string_index, CHECK_(nullHandle));
+ symbolOop sym = cp->symbol_at(string_index);
+ cp->unresolved_string_at_put(index, sym);
+ }
+ break;
+ default:
+ fatal1("bad constant pool tag value %u", cp->tag_at(index).value());
+ ShouldNotReachHere();
+ break;
+ } // end of switch
+ } // end of for
+
+ if (!_need_verify) {
+ return cp;
+ }
+
+ // second verification pass - checks the strings are of the right format.
+ for (index = 1; index < length; index++) {
+ jbyte tag = cp->tag_at(index).value();
+ switch (tag) {
+ case JVM_CONSTANT_UnresolvedClass: {
+ symbolHandle class_name(THREAD, cp->unresolved_klass_at(index));
+ verify_legal_class_name(class_name, CHECK_(nullHandle));
+ break;
+ }
+ case JVM_CONSTANT_Fieldref:
+ case JVM_CONSTANT_Methodref:
+ case JVM_CONSTANT_InterfaceMethodref: {
+ int name_and_type_ref_index = cp->name_and_type_ref_index_at(index);
+ // already verified to be utf8
+ int name_ref_index = cp->name_ref_index_at(name_and_type_ref_index);
+ // already verified to be utf8
+ int signature_ref_index = cp->signature_ref_index_at(name_and_type_ref_index);
+ symbolHandle name(THREAD, cp->symbol_at(name_ref_index));
+ symbolHandle signature(THREAD, cp->symbol_at(signature_ref_index));
+ if (tag == JVM_CONSTANT_Fieldref) {
+ verify_legal_field_name(name, CHECK_(nullHandle));
+ verify_legal_field_signature(name, signature, CHECK_(nullHandle));
+ } else {
+ verify_legal_method_name(name, CHECK_(nullHandle));
+ verify_legal_method_signature(name, signature, CHECK_(nullHandle));
+ if (tag == JVM_CONSTANT_Methodref) {
+ // 4509014: If a class method name begins with '<', it must be "<init>".
+ assert(!name.is_null(), "method name in constant pool is null");
+ unsigned int name_len = name->utf8_length();
+ assert(name_len > 0, "bad method name"); // already verified as legal name
+ if (name->byte_at(0) == '<') {
+ if (name() != vmSymbols::object_initializer_name()) {
+ classfile_parse_error(
+ "Bad method name at constant pool index %u in class file %s",
+ name_ref_index, CHECK_(nullHandle));
+ }
+ }
+ }
+ }
+ break;
+ }
+ } // end of switch
+ } // end of for
+
+ return cp;
+}
+
+
+class NameSigHash: public ResourceObj {
+ public:
+ symbolOop _name; // name
+ symbolOop _sig; // signature
+ NameSigHash* _next; // Next entry in hash table
+};
+
+
+#define HASH_ROW_SIZE 256
+
+unsigned int hash(symbolOop name, symbolOop sig) {
+ unsigned int raw_hash = 0;
+ raw_hash += ((unsigned int)(uintptr_t)name) >> (LogHeapWordSize + 2);
+ raw_hash += ((unsigned int)(uintptr_t)sig) >> LogHeapWordSize;
+
+ return (raw_hash + (unsigned int)(uintptr_t)name) % HASH_ROW_SIZE;
+}
+
+
+void initialize_hashtable(NameSigHash** table) {
+ memset((void*)table, 0, sizeof(NameSigHash*) * HASH_ROW_SIZE);
+}
+
+// Return false if the name/sig combination is found in table.
+// Return true if no duplicate is found. And name/sig is added as a new entry in table.
+// The old format checker uses heap sort to find duplicates.
+// NOTE: caller should guarantee that GC doesn't happen during the life cycle
+// of table since we don't expect symbolOop's to move.
+bool put_after_lookup(symbolOop name, symbolOop sig, NameSigHash** table) {
+ assert(name != NULL, "name in constant pool is NULL");
+
+ // First lookup for duplicates
+ int index = hash(name, sig);
+ NameSigHash* entry = table[index];
+ while (entry != NULL) {
+ if (entry->_name == name && entry->_sig == sig) {
+ return false;
+ }
+ entry = entry->_next;
+ }
+
+ // No duplicate is found, allocate a new entry and fill it.
+ entry = new NameSigHash();
+ entry->_name = name;
+ entry->_sig = sig;
+
+ // Insert into hash table
+ entry->_next = table[index];
+ table[index] = entry;
+
+ return true;
+}
+
+
+objArrayHandle ClassFileParser::parse_interfaces(constantPoolHandle cp,
+ int length,
+ Handle class_loader,
+ Handle protection_domain,
+ PerfTraceTime* vmtimer,
+ symbolHandle class_name,
+ TRAPS) {
+ ClassFileStream* cfs = stream();
+ assert(length > 0, "only called for length>0");
+ objArrayHandle nullHandle;
+ objArrayOop interface_oop = oopFactory::new_system_objArray(length, CHECK_(nullHandle));
+ objArrayHandle interfaces (THREAD, interface_oop);
+
+ int index;
+ for (index = 0; index < length; index++) {
+ u2 interface_index = cfs->get_u2(CHECK_(nullHandle));
+ check_property(
+ valid_cp_range(interface_index, cp->length()) &&
+ cp->tag_at(interface_index).is_unresolved_klass(),
+ "Interface name has bad constant pool index %u in class file %s",
+ interface_index, CHECK_(nullHandle));
+ symbolHandle unresolved_klass (THREAD, cp->klass_name_at(interface_index));
+
+ // Don't need to check legal name because it's checked when parsing constant pool.
+ // But need to make sure it's not an array type.
+ guarantee_property(unresolved_klass->byte_at(0) != JVM_SIGNATURE_ARRAY,
+ "Bad interface name in class file %s", CHECK_(nullHandle));
+
+ vmtimer->suspend(); // do not count recursive loading twice
+ // Call resolve_super so classcircularity is checked
+ klassOop k = SystemDictionary::resolve_super_or_fail(class_name,
+ unresolved_klass, class_loader, protection_domain,
+ false, CHECK_(nullHandle));
+ KlassHandle interf (THREAD, k);
+ vmtimer->resume();
+
+ if (!Klass::cast(interf())->is_interface()) {
+ THROW_MSG_(vmSymbols::java_lang_IncompatibleClassChangeError(), "Implementing class", nullHandle);
+ }
+ interfaces->obj_at_put(index, interf());
+ }
+
+ if (!_need_verify || length <= 1) {
+ return interfaces;
+ }
+
+ // Check if there's any duplicates in interfaces
+ ResourceMark rm(THREAD);
+ NameSigHash** interface_names = NEW_RESOURCE_ARRAY_IN_THREAD(
+ THREAD, NameSigHash*, HASH_ROW_SIZE);
+ initialize_hashtable(interface_names);
+ bool dup = false;
+ {
+ debug_only(No_Safepoint_Verifier nsv;)
+ for (index = 0; index < length; index++) {
+ klassOop k = (klassOop)interfaces->obj_at(index);
+ symbolOop name = instanceKlass::cast(k)->name();
+ // If no duplicates, add (name, NULL) in hashtable interface_names.
+ if (!put_after_lookup(name, NULL, interface_names)) {
+ dup = true;
+ break;
+ }
+ }
+ }
+ if (dup) {
+ classfile_parse_error("Duplicate interface name in class file %s",
+ CHECK_(nullHandle));
+ }
+
+ return interfaces;
+}
+
+
+void ClassFileParser::verify_constantvalue(int constantvalue_index, int signature_index, constantPoolHandle cp, TRAPS) {
+ // Make sure the constant pool entry is of a type appropriate to this field
+ guarantee_property(
+ (constantvalue_index > 0 &&
+ constantvalue_index < cp->length()),
+ "Bad initial value index %u in ConstantValue attribute in class file %s",
+ constantvalue_index, CHECK);
+ constantTag value_type = cp->tag_at(constantvalue_index);
+ switch ( cp->basic_type_for_signature_at(signature_index) ) {
+ case T_LONG:
+ guarantee_property(value_type.is_long(), "Inconsistent constant value type in class file %s", CHECK);
+ break;
+ case T_FLOAT:
+ guarantee_property(value_type.is_float(), "Inconsistent constant value type in class file %s", CHECK);
+ break;
+ case T_DOUBLE:
+ guarantee_property(value_type.is_double(), "Inconsistent constant value type in class file %s", CHECK);
+ break;
+ case T_BYTE: case T_CHAR: case T_SHORT: case T_BOOLEAN: case T_INT:
+ guarantee_property(value_type.is_int(), "Inconsistent constant value type in class file %s", CHECK);
+ break;
+ case T_OBJECT:
+ guarantee_property((cp->symbol_at(signature_index)->equals("Ljava/lang/String;", 18)
+ && (value_type.is_string() || value_type.is_unresolved_string())),
+ "Bad string initial value in class file %s", CHECK);
+ break;
+ default:
+ classfile_parse_error(
+ "Unable to set initial value %u in class file %s",
+ constantvalue_index, CHECK);
+ }
+}
+
+
+// Parse attributes for a field.
+void ClassFileParser::parse_field_attributes(constantPoolHandle cp,
+ u2 attributes_count,
+ bool is_static, u2 signature_index,
+ u2* constantvalue_index_addr,
+ bool* is_synthetic_addr,
+ u2* generic_signature_index_addr,
+ typeArrayHandle* field_annotations,
+ TRAPS) {
+ ClassFileStream* cfs = stream();
+ assert(attributes_count > 0, "length should be greater than 0");
+ u2 constantvalue_index = 0;
+ u2 generic_signature_index = 0;
+ bool is_synthetic = false;
+ u1* runtime_visible_annotations = NULL;
+ int runtime_visible_annotations_length = 0;
+ u1* runtime_invisible_annotations = NULL;
+ int runtime_invisible_annotations_length = 0;
+ while (attributes_count--) {
+ cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
+ u2 attribute_name_index = cfs->get_u2_fast();
+ u4 attribute_length = cfs->get_u4_fast();
+ check_property(valid_cp_range(attribute_name_index, cp->length()) &&
+ cp->tag_at(attribute_name_index).is_utf8(),
+ "Invalid field attribute index %u in class file %s",
+ attribute_name_index,
+ CHECK);
+ symbolOop attribute_name = cp->symbol_at(attribute_name_index);
+ if (is_static && attribute_name == vmSymbols::tag_constant_value()) {
+ // ignore if non-static
+ if (constantvalue_index != 0) {
+ classfile_parse_error("Duplicate ConstantValue attribute in class file %s", CHECK);
+ }
+ check_property(
+ attribute_length == 2,
+ "Invalid ConstantValue field attribute length %u in class file %s",
+ attribute_length, CHECK);
+ constantvalue_index = cfs->get_u2(CHECK);
+ if (_need_verify) {
+ verify_constantvalue(constantvalue_index, signature_index, cp, CHECK);
+ }
+ } else if (attribute_name == vmSymbols::tag_synthetic()) {
+ if (attribute_length != 0) {
+ classfile_parse_error(
+ "Invalid Synthetic field attribute length %u in class file %s",
+ attribute_length, CHECK);
+ }
+ is_synthetic = true;
+ } else if (attribute_name == vmSymbols::tag_deprecated()) { // 4276120
+ if (attribute_length != 0) {
+ classfile_parse_error(
+ "Invalid Deprecated field attribute length %u in class file %s",
+ attribute_length, CHECK);
+ }
+ } else if (_major_version >= JAVA_1_5_VERSION) {
+ if (attribute_name == vmSymbols::tag_signature()) {
+ if (attribute_length != 2) {
+ classfile_parse_error(
+ "Wrong size %u for field's Signature attribute in class file %s",
+ attribute_length, CHECK);
+ }
+ generic_signature_index = cfs->get_u2(CHECK);
+ } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
+ runtime_visible_annotations_length = attribute_length;
+ runtime_visible_annotations = cfs->get_u1_buffer();
+ assert(runtime_visible_annotations != NULL, "null visible annotations");
+ cfs->skip_u1(runtime_visible_annotations_length, CHECK);
+ } else if (PreserveAllAnnotations && attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
+ runtime_invisible_annotations_length = attribute_length;
+ runtime_invisible_annotations = cfs->get_u1_buffer();
+ assert(runtime_invisible_annotations != NULL, "null invisible annotations");
+ cfs->skip_u1(runtime_invisible_annotations_length, CHECK);
+ } else {
+ cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
+ }
+ } else {
+ cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
+ }
+ }
+
+ *constantvalue_index_addr = constantvalue_index;
+ *is_synthetic_addr = is_synthetic;
+ *generic_signature_index_addr = generic_signature_index;
+ *field_annotations = assemble_annotations(runtime_visible_annotations,
+ runtime_visible_annotations_length,
+ runtime_invisible_annotations,
+ runtime_invisible_annotations_length,
+ CHECK);
+ return;
+}
+
+
+// Field allocation types. Used for computing field offsets.
+
+enum FieldAllocationType {
+ STATIC_OOP, // Oops
+ STATIC_BYTE, // Boolean, Byte, char
+ STATIC_SHORT, // shorts
+ STATIC_WORD, // ints
+ STATIC_DOUBLE, // long or double
+ STATIC_ALIGNED_DOUBLE,// aligned long or double
+ NONSTATIC_OOP,
+ NONSTATIC_BYTE,
+ NONSTATIC_SHORT,
+ NONSTATIC_WORD,
+ NONSTATIC_DOUBLE,
+ NONSTATIC_ALIGNED_DOUBLE
+};
+
+
+struct FieldAllocationCount {
+ int static_oop_count;
+ int static_byte_count;
+ int static_short_count;
+ int static_word_count;
+ int static_double_count;
+ int nonstatic_oop_count;
+ int nonstatic_byte_count;
+ int nonstatic_short_count;
+ int nonstatic_word_count;
+ int nonstatic_double_count;
+};
+
+typeArrayHandle ClassFileParser::parse_fields(constantPoolHandle cp, bool is_interface,
+ struct FieldAllocationCount *fac,
+ objArrayHandle* fields_annotations, TRAPS) {
+ ClassFileStream* cfs = stream();
+ typeArrayHandle nullHandle;
+ cfs->guarantee_more(2, CHECK_(nullHandle)); // length
+ u2 length = cfs->get_u2_fast();
+ // Tuples of shorts [access, name index, sig index, initial value index, byte offset, generic signature index]
+ typeArrayOop new_fields = oopFactory::new_permanent_shortArray(length*instanceKlass::next_offset, CHECK_(nullHandle));
+ typeArrayHandle fields(THREAD, new_fields);
+
+ int index = 0;
+ typeArrayHandle field_annotations;
+ for (int n = 0; n < length; n++) {
+ cfs->guarantee_more(8, CHECK_(nullHandle)); // access_flags, name_index, descriptor_index, attributes_count
+
+ AccessFlags access_flags;
+ jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_FIELD_MODIFIERS;
+ verify_legal_field_modifiers(flags, is_interface, CHECK_(nullHandle));
+ access_flags.set_flags(flags);
+
+ u2 name_index = cfs->get_u2_fast();
+ int cp_size = cp->length();
+ check_property(
+ valid_cp_range(name_index, cp_size) && cp->tag_at(name_index).is_utf8(),
+ "Invalid constant pool index %u for field name in class file %s",
+ name_index, CHECK_(nullHandle));
+ symbolHandle name(THREAD, cp->symbol_at(name_index));
+ verify_legal_field_name(name, CHECK_(nullHandle));
+
+ u2 signature_index = cfs->get_u2_fast();
+ check_property(
+ valid_cp_range(signature_index, cp_size) &&
+ cp->tag_at(signature_index).is_utf8(),
+ "Invalid constant pool index %u for field signature in class file %s",
+ signature_index, CHECK_(nullHandle));
+ symbolHandle sig(THREAD, cp->symbol_at(signature_index));
+ verify_legal_field_signature(name, sig, CHECK_(nullHandle));
+
+ u2 constantvalue_index = 0;
+ bool is_synthetic = false;
+ u2 generic_signature_index = 0;
+ bool is_static = access_flags.is_static();
+
+ u2 attributes_count = cfs->get_u2_fast();
+ if (attributes_count > 0) {
+ parse_field_attributes(cp, attributes_count, is_static, signature_index,
+ &constantvalue_index, &is_synthetic,
+ &generic_signature_index, &field_annotations,
+ CHECK_(nullHandle));
+ if (field_annotations.not_null()) {
+ if (fields_annotations->is_null()) {
+ objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle));
+ *fields_annotations = objArrayHandle(THREAD, md);
+ }
+ (*fields_annotations)->obj_at_put(n, field_annotations());
+ }
+ if (is_synthetic) {
+ access_flags.set_is_synthetic();
+ }
+ }
+
+ fields->short_at_put(index++, access_flags.as_short());
+ fields->short_at_put(index++, name_index);
+ fields->short_at_put(index++, signature_index);
+ fields->short_at_put(index++, constantvalue_index);
+
+ // Remember how many oops we encountered and compute allocation type
+ BasicType type = cp->basic_type_for_signature_at(signature_index);
+ FieldAllocationType atype;
+ if ( is_static ) {
+ switch ( type ) {
+ case T_BOOLEAN:
+ case T_BYTE:
+ fac->static_byte_count++;
+ atype = STATIC_BYTE;
+ break;
+ case T_LONG:
+ case T_DOUBLE:
+ if (Universe::field_type_should_be_aligned(type)) {
+ atype = STATIC_ALIGNED_DOUBLE;
+ } else {
+ atype = STATIC_DOUBLE;
+ }
+ fac->static_double_count++;
+ break;
+ case T_CHAR:
+ case T_SHORT:
+ fac->static_short_count++;
+ atype = STATIC_SHORT;
+ break;
+ case T_FLOAT:
+ case T_INT:
+ fac->static_word_count++;
+ atype = STATIC_WORD;
+ break;
+ case T_ARRAY:
+ case T_OBJECT:
+ fac->static_oop_count++;
+ atype = STATIC_OOP;
+ break;
+ case T_ADDRESS:
+ case T_VOID:
+ default:
+ assert(0, "bad field type");
+ }
+ } else {
+ switch ( type ) {
+ case T_BOOLEAN:
+ case T_BYTE:
+ fac->nonstatic_byte_count++;
+ atype = NONSTATIC_BYTE;
+ break;
+ case T_LONG:
+ case T_DOUBLE:
+ if (Universe::field_type_should_be_aligned(type)) {
+ atype = NONSTATIC_ALIGNED_DOUBLE;
+ } else {
+ atype = NONSTATIC_DOUBLE;
+ }
+ fac->nonstatic_double_count++;
+ break;
+ case T_CHAR:
+ case T_SHORT:
+ fac->nonstatic_short_count++;
+ atype = NONSTATIC_SHORT;
+ break;
+ case T_FLOAT:
+ case T_INT:
+ fac->nonstatic_word_count++;
+ atype = NONSTATIC_WORD;
+ break;
+ case T_ARRAY:
+ case T_OBJECT:
+ fac->nonstatic_oop_count++;
+ atype = NONSTATIC_OOP;
+ break;
+ case T_ADDRESS:
+ case T_VOID:
+ default:
+ assert(0, "bad field type");
+ }
+ }
+
+ // The correct offset is computed later (all oop fields will be located together)
+ // We temporarily store the allocation type in the offset field
+ fields->short_at_put(index++, atype);
+ fields->short_at_put(index++, 0); // Clear out high word of byte offset
+ fields->short_at_put(index++, generic_signature_index);
+ }
+
+ if (_need_verify && length > 1) {
+ // Check duplicated fields
+ ResourceMark rm(THREAD);
+ NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
+ THREAD, NameSigHash*, HASH_ROW_SIZE);
+ initialize_hashtable(names_and_sigs);
+ bool dup = false;
+ {
+ debug_only(No_Safepoint_Verifier nsv;)
+ for (int i = 0; i < length*instanceKlass::next_offset; i += instanceKlass::next_offset) {
+ int name_index = fields->ushort_at(i + instanceKlass::name_index_offset);
+ symbolOop name = cp->symbol_at(name_index);
+ int sig_index = fields->ushort_at(i + instanceKlass::signature_index_offset);
+ symbolOop sig = cp->symbol_at(sig_index);
+ // If no duplicates, add name/signature in hashtable names_and_sigs.
+ if (!put_after_lookup(name, sig, names_and_sigs)) {
+ dup = true;
+ break;
+ }
+ }
+ }
+ if (dup) {
+ classfile_parse_error("Duplicate field name&signature in class file %s",
+ CHECK_(nullHandle));
+ }
+ }
+
+ return fields;
+}
+
+
+static void copy_u2_with_conversion(u2* dest, u2* src, int length) {
+ while (length-- > 0) {
+ *dest++ = Bytes::get_Java_u2((u1*) (src++));
+ }
+}
+
+
+typeArrayHandle ClassFileParser::parse_exception_table(u4 code_length,
+ u4 exception_table_length,
+ constantPoolHandle cp,
+ TRAPS) {
+ ClassFileStream* cfs = stream();
+ typeArrayHandle nullHandle;
+
+ // 4-tuples of ints [start_pc, end_pc, handler_pc, catch_type index]
+ typeArrayOop eh = oopFactory::new_permanent_intArray(exception_table_length*4, CHECK_(nullHandle));
+ typeArrayHandle exception_handlers = typeArrayHandle(THREAD, eh);
+
+ int index = 0;
+ cfs->guarantee_more(8 * exception_table_length, CHECK_(nullHandle)); // start_pc, end_pc, handler_pc, catch_type_index
+ for (unsigned int i = 0; i < exception_table_length; i++) {
+ u2 start_pc = cfs->get_u2_fast();
+ u2 end_pc = cfs->get_u2_fast();
+ u2 handler_pc = cfs->get_u2_fast();
+ u2 catch_type_index = cfs->get_u2_fast();
+ // Will check legal target after parsing code array in verifier.
+ if (_need_verify) {
+ guarantee_property((start_pc < end_pc) && (end_pc <= code_length),
+ "Illegal exception table range in class file %s", CHECK_(nullHandle));
+ guarantee_property(handler_pc < code_length,
+ "Illegal exception table handler in class file %s", CHECK_(nullHandle));
+ if (catch_type_index != 0) {
+ guarantee_property(valid_cp_range(catch_type_index, cp->length()) &&
+ (cp->tag_at(catch_type_index).is_klass() ||
+ cp->tag_at(catch_type_index).is_unresolved_klass()),
+ "Catch type in exception table has bad constant type in class file %s", CHECK_(nullHandle));
+ }
+ }
+ exception_handlers->int_at_put(index++, start_pc);
+ exception_handlers->int_at_put(index++, end_pc);
+ exception_handlers->int_at_put(index++, handler_pc);
+ exception_handlers->int_at_put(index++, catch_type_index);
+ }
+ return exception_handlers;
+}
+
+void ClassFileParser::parse_linenumber_table(
+ u4 code_attribute_length, u4 code_length,
+ CompressedLineNumberWriteStream** write_stream, TRAPS) {
+ ClassFileStream* cfs = stream();
+ unsigned int num_entries = cfs->get_u2(CHECK);
+
+ // Each entry is a u2 start_pc, and a u2 line_number
+ unsigned int length_in_bytes = num_entries * (sizeof(u2) + sizeof(u2));
+
+ // Verify line number attribute and table length
+ check_property(
+ code_attribute_length == sizeof(u2) + length_in_bytes,
+ "LineNumberTable attribute has wrong length in class file %s", CHECK);
+
+ cfs->guarantee_more(length_in_bytes, CHECK);
+
+ if ((*write_stream) == NULL) {
+ if (length_in_bytes > fixed_buffer_size) {
+ (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes);
+ } else {
+ (*write_stream) = new CompressedLineNumberWriteStream(
+ linenumbertable_buffer, fixed_buffer_size);
+ }
+ }
+
+ while (num_entries-- > 0) {
+ u2 bci = cfs->get_u2_fast(); // start_pc
+ u2 line = cfs->get_u2_fast(); // line_number
+ guarantee_property(bci < code_length,
+ "Invalid pc in LineNumberTable in class file %s", CHECK);
+ (*write_stream)->write_pair(bci, line);
+ }
+}
+
+
+// Class file LocalVariableTable elements.
+class Classfile_LVT_Element VALUE_OBJ_CLASS_SPEC {
+ public:
+ u2 start_bci;
+ u2 length;
+ u2 name_cp_index;
+ u2 descriptor_cp_index;
+ u2 slot;
+};
+
+
+class LVT_Hash: public CHeapObj {
+ public:
+ LocalVariableTableElement *_elem; // element
+ LVT_Hash* _next; // Next entry in hash table
+};
+
+unsigned int hash(LocalVariableTableElement *elem) {
+ unsigned int raw_hash = elem->start_bci;
+
+ raw_hash = elem->length + raw_hash * 37;
+ raw_hash = elem->name_cp_index + raw_hash * 37;
+ raw_hash = elem->slot + raw_hash * 37;
+
+ return raw_hash % HASH_ROW_SIZE;
+}
+
+void initialize_hashtable(LVT_Hash** table) {
+ for (int i = 0; i < HASH_ROW_SIZE; i++) {
+ table[i] = NULL;
+ }
+}
+
+void clear_hashtable(LVT_Hash** table) {
+ for (int i = 0; i < HASH_ROW_SIZE; i++) {
+ LVT_Hash* current = table[i];
+ LVT_Hash* next;
+ while (current != NULL) {
+ next = current->_next;
+ current->_next = NULL;
+ delete(current);
+ current = next;
+ }
+ table[i] = NULL;
+ }
+}
+
+LVT_Hash* LVT_lookup(LocalVariableTableElement *elem, int index, LVT_Hash** table) {
+ LVT_Hash* entry = table[index];
+
+ /*
+ * 3-tuple start_bci/length/slot has to be unique key,
+ * so the following comparison seems to be redundant:
+ * && elem->name_cp_index == entry->_elem->name_cp_index
+ */
+ while (entry != NULL) {
+ if (elem->start_bci == entry->_elem->start_bci
+ && elem->length == entry->_elem->length
+ && elem->name_cp_index == entry->_elem->name_cp_index
+ && elem->slot == entry->_elem->slot
+ ) {
+ return entry;
+ }
+ entry = entry->_next;
+ }
+ return NULL;
+}
+
+// Return false if the local variable is found in table.
+// Return true if no duplicate is found.
+// And local variable is added as a new entry in table.
+bool LVT_put_after_lookup(LocalVariableTableElement *elem, LVT_Hash** table) {
+ // First lookup for duplicates
+ int index = hash(elem);
+ LVT_Hash* entry = LVT_lookup(elem, index, table);
+
+ if (entry != NULL) {
+ return false;
+ }
+ // No duplicate is found, allocate a new entry and fill it.
+ if ((entry = new LVT_Hash()) == NULL) {
+ return false;
+ }
+ entry->_elem = elem;
+
+ // Insert into hash table
+ entry->_next = table[index];
+ table[index] = entry;
+
+ return true;
+}
+
+void copy_lvt_element(Classfile_LVT_Element *src, LocalVariableTableElement *lvt) {
+ lvt->start_bci = Bytes::get_Java_u2((u1*) &src->start_bci);
+ lvt->length = Bytes::get_Java_u2((u1*) &src->length);
+ lvt->name_cp_index = Bytes::get_Java_u2((u1*) &src->name_cp_index);
+ lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index);
+ lvt->signature_cp_index = 0;
+ lvt->slot = Bytes::get_Java_u2((u1*) &src->slot);
+}
+
+// Function is used to parse both attributes:
+// LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT)
+u2* ClassFileParser::parse_localvariable_table(u4 code_length,
+ u2 max_locals,
+ u4 code_attribute_length,
+ constantPoolHandle cp,
+ u2* localvariable_table_length,
+ bool isLVTT,
+ TRAPS) {
+ ClassFileStream* cfs = stream();
+ const char * tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable";
+ *localvariable_table_length = cfs->get_u2(CHECK_NULL);
+ unsigned int size = (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2);
+ // Verify local variable table attribute has right length
+ if (_need_verify) {
+ guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)),
+ "%s has wrong length in class file %s", tbl_name, CHECK_NULL);
+ }
+ u2* localvariable_table_start = cfs->get_u2_buffer();
+ assert(localvariable_table_start != NULL, "null local variable table");
+ if (!_need_verify) {
+ cfs->skip_u2_fast(size);
+ } else {
+ cfs->guarantee_more(size * 2, CHECK_NULL);
+ for(int i = 0; i < (*localvariable_table_length); i++) {
+ u2 start_pc = cfs->get_u2_fast();
+ u2 length = cfs->get_u2_fast();
+ u2 name_index = cfs->get_u2_fast();
+ u2 descriptor_index = cfs->get_u2_fast();
+ u2 index = cfs->get_u2_fast();
+ // Assign to a u4 to avoid overflow
+ u4 end_pc = (u4)start_pc + (u4)length;
+
+ if (start_pc >= code_length) {
+ classfile_parse_error(
+ "Invalid start_pc %u in %s in class file %s",
+ start_pc, tbl_name, CHECK_NULL);
+ }
+ if (end_pc > code_length) {
+ classfile_parse_error(
+ "Invalid length %u in %s in class file %s",
+ length, tbl_name, CHECK_NULL);
+ }
+ int cp_size = cp->length();
+ guarantee_property(
+ valid_cp_range(name_index, cp_size) &&
+ cp->tag_at(name_index).is_utf8(),
+ "Name index %u in %s has bad constant type in class file %s",
+ name_index, tbl_name, CHECK_NULL);
+ guarantee_property(
+ valid_cp_range(descriptor_index, cp_size) &&
+ cp->tag_at(descriptor_index).is_utf8(),
+ "Signature index %u in %s has bad constant type in class file %s",
+ descriptor_index, tbl_name, CHECK_NULL);
+
+ symbolHandle name(THREAD, cp->symbol_at(name_index));
+ symbolHandle sig(THREAD, cp->symbol_at(descriptor_index));
+ verify_legal_field_name(name, CHECK_NULL);
+ u2 extra_slot = 0;
+ if (!isLVTT) {
+ verify_legal_field_signature(name, sig, CHECK_NULL);
+
+ // 4894874: check special cases for double and long local variables
+ if (sig() == vmSymbols::type_signature(T_DOUBLE) ||
+ sig() == vmSymbols::type_signature(T_LONG)) {
+ extra_slot = 1;
+ }
+ }
+ guarantee_property((index + extra_slot) < max_locals,
+ "Invalid index %u in %s in class file %s",
+ index, tbl_name, CHECK_NULL);
+ }
+ }
+ return localvariable_table_start;
+}
+
+
+void ClassFileParser::parse_type_array(u2 array_length, u4 code_length, u4* u1_index, u4* u2_index,
+ u1* u1_array, u2* u2_array, constantPoolHandle cp, TRAPS) {
+ ClassFileStream* cfs = stream();
+ u2 index = 0; // index in the array with long/double occupying two slots
+ u4 i1 = *u1_index;
+ u4 i2 = *u2_index + 1;
+ for(int i = 0; i < array_length; i++) {
+ u1 tag = u1_array[i1++] = cfs->get_u1(CHECK);
+ index++;
+ if (tag == ITEM_Long || tag == ITEM_Double) {
+ index++;
+ } else if (tag == ITEM_Object) {
+ u2 class_index = u2_array[i2++] = cfs->get_u2(CHECK);
+ guarantee_property(valid_cp_range(class_index, cp->length()) &&
+ cp->tag_at(class_index).is_unresolved_klass(),
+ "Bad class index %u in StackMap in class file %s",
+ class_index, CHECK);
+ } else if (tag == ITEM_Uninitialized) {
+ u2 offset = u2_array[i2++] = cfs->get_u2(CHECK);
+ guarantee_property(
+ offset < code_length,
+ "Bad uninitialized type offset %u in StackMap in class file %s",
+ offset, CHECK);
+ } else {
+ guarantee_property(
+ tag <= (u1)ITEM_Uninitialized,
+ "Unknown variable type %u in StackMap in class file %s",
+ tag, CHECK);
+ }
+ }
+ u2_array[*u2_index] = index;
+ *u1_index = i1;
+ *u2_index = i2;
+}
+
+typeArrayOop ClassFileParser::parse_stackmap_table(
+ u4 code_attribute_length, TRAPS) {
+ if (code_attribute_length == 0)
+ return NULL;
+
+ ClassFileStream* cfs = stream();
+ u1* stackmap_table_start = cfs->get_u1_buffer();
+ assert(stackmap_table_start != NULL, "null stackmap table");
+
+ // check code_attribute_length first
+ stream()->skip_u1(code_attribute_length, CHECK_NULL);
+
+ if (!_need_verify && !DumpSharedSpaces) {
+ return NULL;
+ }
+
+ typeArrayOop stackmap_data =
+ oopFactory::new_permanent_byteArray(code_attribute_length, CHECK_NULL);
+
+ stackmap_data->set_length(code_attribute_length);
+ memcpy((void*)stackmap_data->byte_at_addr(0),
+ (void*)stackmap_table_start, code_attribute_length);
+ return stackmap_data;
+}
+
+u2* ClassFileParser::parse_checked_exceptions(u2* checked_exceptions_length,
+ u4 method_attribute_length,
+ constantPoolHandle cp, TRAPS) {
+ ClassFileStream* cfs = stream();
+ cfs->guarantee_more(2, CHECK_NULL); // checked_exceptions_length
+ *checked_exceptions_length = cfs->get_u2_fast();
+ unsigned int size = (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2);
+ u2* checked_exceptions_start = cfs->get_u2_buffer();
+ assert(checked_exceptions_start != NULL, "null checked exceptions");
+ if (!_need_verify) {
+ cfs->skip_u2_fast(size);
+ } else {
+ // Verify each value in the checked exception table
+ u2 checked_exception;
+ u2 len = *checked_exceptions_length;
+ cfs->guarantee_more(2 * len, CHECK_NULL);
+ for (int i = 0; i < len; i++) {
+ checked_exception = cfs->get_u2_fast();
+ check_property(
+ valid_cp_range(checked_exception, cp->length()) &&
+ cp->tag_at(checked_exception).is_klass_reference(),
+ "Exception name has bad type at constant pool %u in class file %s",
+ checked_exception, CHECK_NULL);
+ }
+ }
+ // check exceptions attribute length
+ if (_need_verify) {
+ guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) +
+ sizeof(u2) * size),
+ "Exceptions attribute has wrong length in class file %s", CHECK_NULL);
+ }
+ return checked_exceptions_start;
+}
+
+
+#define MAX_ARGS_SIZE 255
+#define MAX_CODE_SIZE 65535
+#define INITIAL_MAX_LVT_NUMBER 256
+
+// Note: the parse_method below is big and clunky because all parsing of the code and exceptions
+// attribute is inlined. This is curbersome to avoid since we inline most of the parts in the
+// methodOop to save footprint, so we only know the size of the resulting methodOop when the
+// entire method attribute is parsed.
+//
+// The promoted_flags parameter is used to pass relevant access_flags
+// from the method back up to the containing klass. These flag values
+// are added to klass's access_flags.
+
+methodHandle ClassFileParser::parse_method(constantPoolHandle cp, bool is_interface,
+ AccessFlags *promoted_flags,
+ typeArrayHandle* method_annotations,
+ typeArrayHandle* method_parameter_annotations,
+ typeArrayHandle* method_default_annotations,
+ TRAPS) {
+ ClassFileStream* cfs = stream();
+ methodHandle nullHandle;
+ ResourceMark rm(THREAD);
+ // Parse fixed parts
+ cfs->guarantee_more(8, CHECK_(nullHandle)); // access_flags, name_index, descriptor_index, attributes_count
+
+ int flags = cfs->get_u2_fast();
+ u2 name_index = cfs->get_u2_fast();
+ int cp_size = cp->length();
+ check_property(
+ valid_cp_range(name_index, cp_size) &&
+ cp->tag_at(name_index).is_utf8(),
+ "Illegal constant pool index %u for method name in class file %s",
+ name_index, CHECK_(nullHandle));
+ symbolHandle name(THREAD, cp->symbol_at(name_index));
+ verify_legal_method_name(name, CHECK_(nullHandle));
+
+ u2 signature_index = cfs->get_u2_fast();
+ guarantee_property(
+ valid_cp_range(signature_index, cp_size) &&
+ cp->tag_at(signature_index).is_utf8(),
+ "Illegal constant pool index %u for method signature in class file %s",
+ signature_index, CHECK_(nullHandle));
+ symbolHandle signature(THREAD, cp->symbol_at(signature_index));
+
+ AccessFlags access_flags;
+ if (name == vmSymbols::class_initializer_name()) {
+ // We ignore the access flags for a class initializer. (JVM Spec. p. 116)
+ flags = JVM_ACC_STATIC;
+ } else {
+ verify_legal_method_modifiers(flags, is_interface, name, CHECK_(nullHandle));
+ }
+
+ int args_size = -1; // only used when _need_verify is true
+ if (_need_verify) {
+ args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) +
+ verify_legal_method_signature(name, signature, CHECK_(nullHandle));
+ if (args_size > MAX_ARGS_SIZE) {
+ classfile_parse_error("Too many arguments in method signature in class file %s", CHECK_(nullHandle));
+ }
+ }
+
+ access_flags.set_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS);
+
+ // Default values for code and exceptions attribute elements
+ u2 max_stack = 0;
+ u2 max_locals = 0;
+ u4 code_length = 0;
+ u1* code_start = 0;
+ u2 exception_table_length = 0;
+ typeArrayHandle exception_handlers(THREAD, Universe::the_empty_int_array());
+ u2 checked_exceptions_length = 0;
+ u2* checked_exceptions_start = NULL;
+ CompressedLineNumberWriteStream* linenumber_table = NULL;
+ int linenumber_table_length = 0;
+ int total_lvt_length = 0;
+ u2 lvt_cnt = 0;
+ u2 lvtt_cnt = 0;
+ bool lvt_allocated = false;
+ u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER;
+ u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER;
+ u2* localvariable_table_length;
+ u2** localvariable_table_start;
+ u2* localvariable_type_table_length;
+ u2** localvariable_type_table_start;
+ bool parsed_code_attribute = false;
+ bool parsed_checked_exceptions_attribute = false;
+ bool parsed_stackmap_attribute = false;
+ // stackmap attribute - JDK1.5
+ typeArrayHandle stackmap_data;
+ u2 generic_signature_index = 0;
+ u1* runtime_visible_annotations = NULL;
+ int runtime_visible_annotations_length = 0;
+ u1* runtime_invisible_annotations = NULL;
+ int runtime_invisible_annotations_length = 0;
+ u1* runtime_visible_parameter_annotations = NULL;
+ int runtime_visible_parameter_annotations_length = 0;
+ u1* runtime_invisible_parameter_annotations = NULL;
+ int runtime_invisible_parameter_annotations_length = 0;
+ u1* annotation_default = NULL;
+ int annotation_default_length = 0;
+
+ // Parse code and exceptions attribute
+ u2 method_attributes_count = cfs->get_u2_fast();
+ while (method_attributes_count--) {
+ cfs->guarantee_more(6, CHECK_(nullHandle)); // method_attribute_name_index, method_attribute_length
+ u2 method_attribute_name_index = cfs->get_u2_fast();
+ u4 method_attribute_length = cfs->get_u4_fast();
+ check_property(
+ valid_cp_range(method_attribute_name_index, cp_size) &&
+ cp->tag_at(method_attribute_name_index).is_utf8(),
+ "Invalid method attribute name index %u in class file %s",
+ method_attribute_name_index, CHECK_(nullHandle));
+
+ symbolOop method_attribute_name = cp->symbol_at(method_attribute_name_index);
+ if (method_attribute_name == vmSymbols::tag_code()) {
+ // Parse Code attribute
+ if (_need_verify) {
+ guarantee_property(!access_flags.is_native() && !access_flags.is_abstract(),
+ "Code attribute in native or abstract methods in class file %s",
+ CHECK_(nullHandle));
+ }
+ if (parsed_code_attribute) {
+ classfile_parse_error("Multiple Code attributes in class file %s", CHECK_(nullHandle));
+ }
+ parsed_code_attribute = true;
+
+ // Stack size, locals size, and code size
+ if (_major_version == 45 && _minor_version <= 2) {
+ cfs->guarantee_more(4, CHECK_(nullHandle));
+ max_stack = cfs->get_u1_fast();
+ max_locals = cfs->get_u1_fast();
+ code_length = cfs->get_u2_fast();
+ } else {
+ cfs->guarantee_more(8, CHECK_(nullHandle));
+ max_stack = cfs->get_u2_fast();
+ max_locals = cfs->get_u2_fast();
+ code_length = cfs->get_u4_fast();
+ }
+ if (_need_verify) {
+ guarantee_property(args_size <= max_locals,
+ "Arguments can't fit into locals in class file %s", CHECK_(nullHandle));
+ guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE,
+ "Invalid method Code length %u in class file %s",
+ code_length, CHECK_(nullHandle));
+ }
+ // Code pointer
+ code_start = cfs->get_u1_buffer();
+ assert(code_start != NULL, "null code start");
+ cfs->guarantee_more(code_length, CHECK_(nullHandle));
+ cfs->skip_u1_fast(code_length);
+
+ // Exception handler table
+ cfs->guarantee_more(2, CHECK_(nullHandle)); // exception_table_length
+ exception_table_length = cfs->get_u2_fast();
+ if (exception_table_length > 0) {
+ exception_handlers =
+ parse_exception_table(code_length, exception_table_length, cp, CHECK_(nullHandle));
+ }
+
+ // Parse additional attributes in code attribute
+ cfs->guarantee_more(2, CHECK_(nullHandle)); // code_attributes_count
+ u2 code_attributes_count = cfs->get_u2_fast();
+ unsigned int calculated_attribute_length = sizeof(max_stack) +
+ sizeof(max_locals) +
+ sizeof(code_length) +
+ code_length +
+ sizeof(exception_table_length) +
+ sizeof(code_attributes_count) +
+ exception_table_length*(sizeof(u2) /* start_pc */+
+ sizeof(u2) /* end_pc */ +
+ sizeof(u2) /* handler_pc */ +
+ sizeof(u2) /* catch_type_index */);
+
+ while (code_attributes_count--) {
+ cfs->guarantee_more(6, CHECK_(nullHandle)); // code_attribute_name_index, code_attribute_length
+ u2 code_attribute_name_index = cfs->get_u2_fast();
+ u4 code_attribute_length = cfs->get_u4_fast();
+ calculated_attribute_length += code_attribute_length +
+ sizeof(code_attribute_name_index) +
+ sizeof(code_attribute_length);
+ check_property(valid_cp_range(code_attribute_name_index, cp_size) &&
+ cp->tag_at(code_attribute_name_index).is_utf8(),
+ "Invalid code attribute name index %u in class file %s",
+ code_attribute_name_index,
+ CHECK_(nullHandle));
+ if (LoadLineNumberTables &&
+ cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) {
+ // Parse and compress line number table
+ parse_linenumber_table(code_attribute_length, code_length,
+ &linenumber_table, CHECK_(nullHandle));
+
+ } else if (LoadLocalVariableTables &&
+ cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) {
+ // Parse local variable table
+ if (!lvt_allocated) {
+ localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
+ THREAD, u2, INITIAL_MAX_LVT_NUMBER);
+ localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
+ THREAD, u2*, INITIAL_MAX_LVT_NUMBER);
+ localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
+ THREAD, u2, INITIAL_MAX_LVT_NUMBER);
+ localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
+ THREAD, u2*, INITIAL_MAX_LVT_NUMBER);
+ lvt_allocated = true;
+ }
+ if (lvt_cnt == max_lvt_cnt) {
+ max_lvt_cnt <<= 1;
+ REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt);
+ REALLOC_RESOURCE_ARRAY(u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt);
+ }
+ localvariable_table_start[lvt_cnt] =
+ parse_localvariable_table(code_length,
+ max_locals,
+ code_attribute_length,
+ cp,
+ &localvariable_table_length[lvt_cnt],
+ false, // is not LVTT
+ CHECK_(nullHandle));
+ total_lvt_length += localvariable_table_length[lvt_cnt];
+ lvt_cnt++;
+ } else if (LoadLocalVariableTypeTables &&
+ _major_version >= JAVA_1_5_VERSION &&
+ cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) {
+ if (!lvt_allocated) {
+ localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
+ THREAD, u2, INITIAL_MAX_LVT_NUMBER);
+ localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
+ THREAD, u2*, INITIAL_MAX_LVT_NUMBER);
+ localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
+ THREAD, u2, INITIAL_MAX_LVT_NUMBER);
+ localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
+ THREAD, u2*, INITIAL_MAX_LVT_NUMBER);
+ lvt_allocated = true;
+ }
+ // Parse local variable type table
+ if (lvtt_cnt == max_lvtt_cnt) {
+ max_lvtt_cnt <<= 1;
+ REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt);
+ REALLOC_RESOURCE_ARRAY(u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt);
+ }
+ localvariable_type_table_start[lvtt_cnt] =
+ parse_localvariable_table(code_length,
+ max_locals,
+ code_attribute_length,
+ cp,
+ &localvariable_type_table_length[lvtt_cnt],
+ true, // is LVTT
+ CHECK_(nullHandle));
+ lvtt_cnt++;
+ } else if (UseSplitVerifier &&
+ _major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION &&
+ cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) {
+ // Stack map is only needed by the new verifier in JDK1.5.
+ if (parsed_stackmap_attribute) {
+ classfile_parse_error("Multiple StackMapTable attributes in class file %s", CHECK_(nullHandle));
+ }
+ typeArrayOop sm =
+ parse_stackmap_table(code_attribute_length, CHECK_(nullHandle));
+ stackmap_data = typeArrayHandle(THREAD, sm);
+ parsed_stackmap_attribute = true;
+ } else {
+ // Skip unknown attributes
+ cfs->skip_u1(code_attribute_length, CHECK_(nullHandle));
+ }
+ }
+ // check method attribute length
+ if (_need_verify) {
+ guarantee_property(method_attribute_length == calculated_attribute_length,
+ "Code segment has wrong length in class file %s", CHECK_(nullHandle));
+ }
+ } else if (method_attribute_name == vmSymbols::tag_exceptions()) {
+ // Parse Exceptions attribute
+ if (parsed_checked_exceptions_attribute) {
+ classfile_parse_error("Multiple Exceptions attributes in class file %s", CHECK_(nullHandle));
+ }
+ parsed_checked_exceptions_attribute = true;
+ checked_exceptions_start =
+ parse_checked_exceptions(&checked_exceptions_length,
+ method_attribute_length,
+ cp, CHECK_(nullHandle));
+ } else if (method_attribute_name == vmSymbols::tag_synthetic()) {
+ if (method_attribute_length != 0) {
+ classfile_parse_error(
+ "Invalid Synthetic method attribute length %u in class file %s",
+ method_attribute_length, CHECK_(nullHandle));
+ }
+ // Should we check that there hasn't already been a synthetic attribute?
+ access_flags.set_is_synthetic();
+ } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120
+ if (method_attribute_length != 0) {
+ classfile_parse_error(
+ "Invalid Deprecated method attribute length %u in class file %s",
+ method_attribute_length, CHECK_(nullHandle));
+ }
+ } else if (_major_version >= JAVA_1_5_VERSION) {
+ if (method_attribute_name == vmSymbols::tag_signature()) {
+ if (method_attribute_length != 2) {
+ classfile_parse_error(
+ "Invalid Signature attribute length %u in class file %s",
+ method_attribute_length, CHECK_(nullHandle));
+ }
+ cfs->guarantee_more(2, CHECK_(nullHandle)); // generic_signature_index
+ generic_signature_index = cfs->get_u2_fast();
+ } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
+ runtime_visible_annotations_length = method_attribute_length;
+ runtime_visible_annotations = cfs->get_u1_buffer();
+ assert(runtime_visible_annotations != NULL, "null visible annotations");
+ cfs->skip_u1(runtime_visible_annotations_length, CHECK_(nullHandle));
+ } else if (PreserveAllAnnotations && method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
+ runtime_invisible_annotations_length = method_attribute_length;
+ runtime_invisible_annotations = cfs->get_u1_buffer();
+ assert(runtime_invisible_annotations != NULL, "null invisible annotations");
+ cfs->skip_u1(runtime_invisible_annotations_length, CHECK_(nullHandle));
+ } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) {
+ runtime_visible_parameter_annotations_length = method_attribute_length;
+ runtime_visible_parameter_annotations = cfs->get_u1_buffer();
+ assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations");
+ cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_(nullHandle));
+ } else if (PreserveAllAnnotations && method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) {
+ runtime_invisible_parameter_annotations_length = method_attribute_length;
+ runtime_invisible_parameter_annotations = cfs->get_u1_buffer();
+ assert(runtime_invisible_parameter_annotations != NULL, "null invisible parameter annotations");
+ cfs->skip_u1(runtime_invisible_parameter_annotations_length, CHECK_(nullHandle));
+ } else if (method_attribute_name == vmSymbols::tag_annotation_default()) {
+ annotation_default_length = method_attribute_length;
+ annotation_default = cfs->get_u1_buffer();
+ assert(annotation_default != NULL, "null annotation default");
+ cfs->skip_u1(annotation_default_length, CHECK_(nullHandle));
+ } else {
+ // Skip unknown attributes
+ cfs->skip_u1(method_attribute_length, CHECK_(nullHandle));
+ }
+ } else {
+ // Skip unknown attributes
+ cfs->skip_u1(method_attribute_length, CHECK_(nullHandle));
+ }
+ }
+
+ if (linenumber_table != NULL) {
+ linenumber_table->write_terminator();
+ linenumber_table_length = linenumber_table->position();
+ }
+
+ // Make sure there's at least one Code attribute in non-native/non-abstract method
+ if (_need_verify) {
+ guarantee_property(access_flags.is_native() || access_flags.is_abstract() || parsed_code_attribute,
+ "Absent Code attribute in method that is not native or abstract in class file %s", CHECK_(nullHandle));
+ }
+
+ // All sizing information for a methodOop is finally available, now create it
+ methodOop m_oop = oopFactory::new_method(
+ code_length, access_flags, linenumber_table_length,
+ total_lvt_length, checked_exceptions_length, CHECK_(nullHandle));
+ methodHandle m (THREAD, m_oop);
+
+ ClassLoadingService::add_class_method_size(m_oop->size()*HeapWordSize);
+
+ // Fill in information from fixed part (access_flags already set)
+ m->set_constants(cp());
+ m->set_name_index(name_index);
+ m->set_signature_index(signature_index);
+ m->set_generic_signature_index(generic_signature_index);
+#ifdef CC_INTERP
+ // hmm is there a gc issue here??
+ ResultTypeFinder rtf(cp->symbol_at(signature_index));
+ m->set_result_index(rtf.type());
+#endif
+
+ if (args_size >= 0) {
+ m->set_size_of_parameters(args_size);
+ } else {
+ m->compute_size_of_parameters(THREAD);
+ }
+#ifdef ASSERT
+ if (args_size >= 0) {
+ m->compute_size_of_parameters(THREAD);
+ assert(args_size == m->size_of_parameters(), "");
+ }
+#endif
+
+ // Fill in code attribute information
+ m->set_max_stack(max_stack);
+ m->set_max_locals(max_locals);
+ m->constMethod()->set_stackmap_data(stackmap_data());
+
+ /**
+ * The exception_table field is the flag used to indicate
+ * that the methodOop and it's associated constMethodOop are partially
+ * initialized and thus are exempt from pre/post GC verification. Once
+ * the field is set, the oops are considered fully initialized so make
+ * sure that the oops can pass verification when this field is set.
+ */
+ m->set_exception_table(exception_handlers());
+
+ // Copy byte codes
+ if (code_length > 0) {
+ memcpy(m->code_base(), code_start, code_length);
+ }
+
+ // Copy line number table
+ if (linenumber_table != NULL) {
+ memcpy(m->compressed_linenumber_table(),
+ linenumber_table->buffer(), linenumber_table_length);
+ }
+
+ // Copy checked exceptions
+ if (checked_exceptions_length > 0) {
+ int size = checked_exceptions_length * sizeof(CheckedExceptionElement) / sizeof(u2);
+ copy_u2_with_conversion((u2*) m->checked_exceptions_start(), checked_exceptions_start, size);
+ }
+
+ /* Copy class file LVT's/LVTT's into the HotSpot internal LVT.
+ *
+ * Rules for LVT's and LVTT's are:
+ * - There can be any number of LVT's and LVTT's.
+ * - If there are n LVT's, it is the same as if there was just
+ * one LVT containing all the entries from the n LVT's.
+ * - There may be no more than one LVT entry per local variable.
+ * Two LVT entries are 'equal' if these fields are the same:
+ * start_pc, length, name, slot
+ * - There may be no more than one LVTT entry per each LVT entry.
+ * Each LVTT entry has to match some LVT entry.
+ * - HotSpot internal LVT keeps natural ordering of class file LVT entries.
+ */
+ if (total_lvt_length > 0) {
+ int tbl_no, idx;
+
+ promoted_flags->set_has_localvariable_table();
+
+ LVT_Hash** lvt_Hash = NEW_RESOURCE_ARRAY(LVT_Hash*, HASH_ROW_SIZE);
+ initialize_hashtable(lvt_Hash);
+
+ // To fill LocalVariableTable in
+ Classfile_LVT_Element* cf_lvt;
+ LocalVariableTableElement* lvt = m->localvariable_table_start();
+
+ for (tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) {
+ cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no];
+ for (idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) {
+ copy_lvt_element(&cf_lvt[idx], lvt);
+ // If no duplicates, add LVT elem in hashtable lvt_Hash.
+ if (LVT_put_after_lookup(lvt, lvt_Hash) == false
+ && _need_verify
+ && _major_version >= JAVA_1_5_VERSION ) {
+ clear_hashtable(lvt_Hash);
+ classfile_parse_error("Duplicated LocalVariableTable attribute "
+ "entry for '%s' in class file %s",
+ cp->symbol_at(lvt->name_cp_index)->as_utf8(),
+ CHECK_(nullHandle));
+ }
+ }
+ }
+
+ // To merge LocalVariableTable and LocalVariableTypeTable
+ Classfile_LVT_Element* cf_lvtt;
+ LocalVariableTableElement lvtt_elem;
+
+ for (tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) {
+ cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no];
+ for (idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) {
+ copy_lvt_element(&cf_lvtt[idx], &lvtt_elem);
+ int index = hash(&lvtt_elem);
+ LVT_Hash* entry = LVT_lookup(&lvtt_elem, index, lvt_Hash);
+ if (entry == NULL) {
+ if (_need_verify) {
+ clear_hashtable(lvt_Hash);
+ classfile_parse_error("LVTT entry for '%s' in class file %s "
+ "does not match any LVT entry",
+ cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
+ CHECK_(nullHandle));
+ }
+ } else if (entry->_elem->signature_cp_index != 0 && _need_verify) {
+ clear_hashtable(lvt_Hash);
+ classfile_parse_error("Duplicated LocalVariableTypeTable attribute "
+ "entry for '%s' in class file %s",
+ cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
+ CHECK_(nullHandle));
+ } else {
+ // to add generic signatures into LocalVariableTable
+ entry->_elem->signature_cp_index = lvtt_elem.descriptor_cp_index;
+ }
+ }
+ }
+ clear_hashtable(lvt_Hash);
+ }
+
+ *method_annotations = assemble_annotations(runtime_visible_annotations,
+ runtime_visible_annotations_length,
+ runtime_invisible_annotations,
+ runtime_invisible_annotations_length,
+ CHECK_(nullHandle));
+ *method_parameter_annotations = assemble_annotations(runtime_visible_parameter_annotations,
+ runtime_visible_parameter_annotations_length,
+ runtime_invisible_parameter_annotations,
+ runtime_invisible_parameter_annotations_length,
+ CHECK_(nullHandle));
+ *method_default_annotations = assemble_annotations(annotation_default,
+ annotation_default_length,
+ NULL,
+ 0,
+ CHECK_(nullHandle));
+
+ if (name() == vmSymbols::finalize_method_name() &&
+ signature() == vmSymbols::void_method_signature()) {
+ if (m->is_empty_method()) {
+ _has_empty_finalizer = true;
+ } else {
+ _has_finalizer = true;
+ }
+ }
+ if (name() == vmSymbols::object_initializer_name() &&
+ signature() == vmSymbols::void_method_signature() &&
+ m->is_vanilla_constructor()) {
+ _has_vanilla_constructor = true;
+ }
+
+ return m;
+}
+
+
+// The promoted_flags parameter is used to pass relevant access_flags
+// from the methods back up to the containing klass. These flag values
+// are added to klass's access_flags.
+
+objArrayHandle ClassFileParser::parse_methods(constantPoolHandle cp, bool is_interface,
+ AccessFlags* promoted_flags,
+ bool* has_final_method,
+ objArrayOop* methods_annotations_oop,
+ objArrayOop* methods_parameter_annotations_oop,
+ objArrayOop* methods_default_annotations_oop,
+ TRAPS) {
+ ClassFileStream* cfs = stream();
+ objArrayHandle nullHandle;
+ typeArrayHandle method_annotations;
+ typeArrayHandle method_parameter_annotations;
+ typeArrayHandle method_default_annotations;
+ cfs->guarantee_more(2, CHECK_(nullHandle)); // length
+ u2 length = cfs->get_u2_fast();
+ if (length == 0) {
+ return objArrayHandle(THREAD, Universe::the_empty_system_obj_array());
+ } else {
+ objArrayOop m = oopFactory::new_system_objArray(length, CHECK_(nullHandle));
+ objArrayHandle methods(THREAD, m);
+ HandleMark hm(THREAD);
+ objArrayHandle methods_annotations;
+ objArrayHandle methods_parameter_annotations;
+ objArrayHandle methods_default_annotations;
+ for (int index = 0; index < length; index++) {
+ methodHandle method = parse_method(cp, is_interface,
+ promoted_flags,
+ &method_annotations,
+ &method_parameter_annotations,
+ &method_default_annotations,
+ CHECK_(nullHandle));
+ if (method->is_final()) {
+ *has_final_method = true;
+ }
+ methods->obj_at_put(index, method());
+ if (method_annotations.not_null()) {
+ if (methods_annotations.is_null()) {
+ objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle));
+ methods_annotations = objArrayHandle(THREAD, md);
+ }
+ methods_annotations->obj_at_put(index, method_annotations());
+ }
+ if (method_parameter_annotations.not_null()) {
+ if (methods_parameter_annotations.is_null()) {
+ objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle));
+ methods_parameter_annotations = objArrayHandle(THREAD, md);
+ }
+ methods_parameter_annotations->obj_at_put(index, method_parameter_annotations());
+ }
+ if (method_default_annotations.not_null()) {
+ if (methods_default_annotations.is_null()) {
+ objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle));
+ methods_default_annotations = objArrayHandle(THREAD, md);
+ }
+ methods_default_annotations->obj_at_put(index, method_default_annotations());
+ }
+ }
+ if (_need_verify && length > 1) {
+ // Check duplicated methods
+ ResourceMark rm(THREAD);
+ NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
+ THREAD, NameSigHash*, HASH_ROW_SIZE);
+ initialize_hashtable(names_and_sigs);
+ bool dup = false;
+ {
+ debug_only(No_Safepoint_Verifier nsv;)
+ for (int i = 0; i < length; i++) {
+ methodOop m = (methodOop)methods->obj_at(i);
+ // If no duplicates, add name/signature in hashtable names_and_sigs.
+ if (!put_after_lookup(m->name(), m->signature(), names_and_sigs)) {
+ dup = true;
+ break;
+ }
+ }
+ }
+ if (dup) {
+ classfile_parse_error("Duplicate method name&signature in class file %s",
+ CHECK_(nullHandle));
+ }
+ }
+
+ *methods_annotations_oop = methods_annotations();
+ *methods_parameter_annotations_oop = methods_parameter_annotations();
+ *methods_default_annotations_oop = methods_default_annotations();
+
+ return methods;
+ }
+}
+
+
+typeArrayHandle ClassFileParser::sort_methods(objArrayHandle methods,
+ objArrayHandle methods_annotations,
+ objArrayHandle methods_parameter_annotations,
+ objArrayHandle methods_default_annotations,
+ TRAPS) {
+ typeArrayHandle nullHandle;
+ int length = methods()->length();
+ // If JVMTI original method ordering is enabled we have to
+ // remember the original class file ordering.
+ // We temporarily use the vtable_index field in the methodOop to store the
+ // class file index, so we can read in after calling qsort.
+ if (JvmtiExport::can_maintain_original_method_order()) {
+ for (int index = 0; index < length; index++) {
+ methodOop m = methodOop(methods->obj_at(index));
+ assert(!m->valid_vtable_index(), "vtable index should not be set");
+ m->set_vtable_index(index);
+ }
+ }
+ // Sort method array by ascending method name (for faster lookups & vtable construction)
+ // Note that the ordering is not alphabetical, see symbolOopDesc::fast_compare
+ methodOopDesc::sort_methods(methods(),
+ methods_annotations(),
+ methods_parameter_annotations(),
+ methods_default_annotations());
+
+ // If JVMTI original method ordering is enabled construct int array remembering the original ordering
+ if (JvmtiExport::can_maintain_original_method_order()) {
+ typeArrayOop new_ordering = oopFactory::new_permanent_intArray(length, CHECK_(nullHandle));
+ typeArrayHandle method_ordering(THREAD, new_ordering);
+ for (int index = 0; index < length; index++) {
+ methodOop m = methodOop(methods->obj_at(index));
+ int old_index = m->vtable_index();
+ assert(old_index >= 0 && old_index < length, "invalid method index");
+ method_ordering->int_at_put(index, old_index);
+ m->set_vtable_index(methodOopDesc::invalid_vtable_index);
+ }
+ return method_ordering;
+ } else {
+ return typeArrayHandle(THREAD, Universe::the_empty_int_array());
+ }
+}
+
+
+void ClassFileParser::parse_classfile_sourcefile_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) {
+ ClassFileStream* cfs = stream();
+ cfs->guarantee_more(2, CHECK); // sourcefile_index
+ u2 sourcefile_index = cfs->get_u2_fast();
+ check_property(
+ valid_cp_range(sourcefile_index, cp->length()) &&
+ cp->tag_at(sourcefile_index).is_utf8(),
+ "Invalid SourceFile attribute at constant pool index %u in class file %s",
+ sourcefile_index, CHECK);
+ k->set_source_file_name(cp->symbol_at(sourcefile_index));
+}
+
+
+
+void ClassFileParser::parse_classfile_source_debug_extension_attribute(constantPoolHandle cp,
+ instanceKlassHandle k,
+ int length, TRAPS) {
+ ClassFileStream* cfs = stream();
+ u1* sde_buffer = cfs->get_u1_buffer();
+ assert(sde_buffer != NULL, "null sde buffer");
+
+ // Don't bother storing it if there is no way to retrieve it
+ if (JvmtiExport::can_get_source_debug_extension()) {
+ // Optimistically assume that only 1 byte UTF format is used
+ // (common case)
+ symbolOop sde_symbol = oopFactory::new_symbol((char*)sde_buffer,
+ length, CHECK);
+ k->set_source_debug_extension(sde_symbol);
+ }
+ // Got utf8 string, set stream position forward
+ cfs->skip_u1(length, CHECK);
+}
+
+
+// Inner classes can be static, private or protected (classic VM does this)
+#define RECOGNIZED_INNER_CLASS_MODIFIERS (JVM_RECOGNIZED_CLASS_MODIFIERS | JVM_ACC_PRIVATE | JVM_ACC_PROTECTED | JVM_ACC_STATIC)
+
+// Return number of classes in the inner classes attribute table
+u2 ClassFileParser::parse_classfile_inner_classes_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) {
+ ClassFileStream* cfs = stream();
+ cfs->guarantee_more(2, CHECK_0); // length
+ u2 length = cfs->get_u2_fast();
+
+ // 4-tuples of shorts [inner_class_info_index, outer_class_info_index, inner_name_index, inner_class_access_flags]
+ typeArrayOop ic = oopFactory::new_permanent_shortArray(length*4, CHECK_0);
+ typeArrayHandle inner_classes(THREAD, ic);
+ int index = 0;
+ int cp_size = cp->length();
+ cfs->guarantee_more(8 * length, CHECK_0); // 4-tuples of u2
+ for (int n = 0; n < length; n++) {
+ // Inner class index
+ u2 inner_class_info_index = cfs->get_u2_fast();
+ check_property(
+ inner_class_info_index == 0 ||
+ (valid_cp_range(inner_class_info_index, cp_size) &&
+ cp->tag_at(inner_class_info_index).is_klass_reference()),
+ "inner_class_info_index %u has bad constant type in class file %s",
+ inner_class_info_index, CHECK_0);
+ // Outer class index
+ u2 outer_class_info_index = cfs->get_u2_fast();
+ check_property(
+ outer_class_info_index == 0 ||
+ (valid_cp_range(outer_class_info_index, cp_size) &&
+ cp->tag_at(outer_class_info_index).is_klass_reference()),
+ "outer_class_info_index %u has bad constant type in class file %s",
+ outer_class_info_index, CHECK_0);
+ // Inner class name
+ u2 inner_name_index = cfs->get_u2_fast();
+ check_property(
+ inner_name_index == 0 || (valid_cp_range(inner_name_index, cp_size) &&
+ cp->tag_at(inner_name_index).is_utf8()),
+ "inner_name_index %u has bad constant type in class file %s",
+ inner_name_index, CHECK_0);
+ if (_need_verify) {
+ guarantee_property(inner_class_info_index != outer_class_info_index,
+ "Class is both outer and inner class in class file %s", CHECK_0);
+ }
+ // Access flags
+ AccessFlags inner_access_flags;
+ jint flags = cfs->get_u2_fast() & RECOGNIZED_INNER_CLASS_MODIFIERS;
+ if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
+ // Set abstract bit for old class files for backward compatibility
+ flags |= JVM_ACC_ABSTRACT;
+ }
+ verify_legal_class_modifiers(flags, CHECK_0);
+ inner_access_flags.set_flags(flags);
+
+ inner_classes->short_at_put(index++, inner_class_info_index);
+ inner_classes->short_at_put(index++, outer_class_info_index);
+ inner_classes->short_at_put(index++, inner_name_index);
+ inner_classes->short_at_put(index++, inner_access_flags.as_short());
+ }
+
+ // 4347400: make sure there's no duplicate entry in the classes array
+ if (_need_verify && _major_version >= JAVA_1_5_VERSION) {
+ for(int i = 0; i < inner_classes->length(); i += 4) {
+ for(int j = i + 4; j < inner_classes->length(); j += 4) {
+ guarantee_property((inner_classes->ushort_at(i) != inner_classes->ushort_at(j) ||
+ inner_classes->ushort_at(i+1) != inner_classes->ushort_at(j+1) ||
+ inner_classes->ushort_at(i+2) != inner_classes->ushort_at(j+2) ||
+ inner_classes->ushort_at(i+3) != inner_classes->ushort_at(j+3)),
+ "Duplicate entry in InnerClasses in class file %s",
+ CHECK_0);
+ }
+ }
+ }
+
+ // Update instanceKlass with inner class info.
+ k->set_inner_classes(inner_classes());
+ return length;
+}
+
+void ClassFileParser::parse_classfile_synthetic_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) {
+ k->set_is_synthetic();
+}
+
+void ClassFileParser::parse_classfile_signature_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) {
+ ClassFileStream* cfs = stream();
+ u2 signature_index = cfs->get_u2(CHECK);
+ check_property(
+ valid_cp_range(signature_index, cp->length()) &&
+ cp->tag_at(signature_index).is_utf8(),
+ "Invalid constant pool index %u in Signature attribute in class file %s",
+ signature_index, CHECK);
+ k->set_generic_signature(cp->symbol_at(signature_index));
+}
+
+void ClassFileParser::parse_classfile_attributes(constantPoolHandle cp, instanceKlassHandle k, TRAPS) {
+ ClassFileStream* cfs = stream();
+ // Set inner classes attribute to default sentinel
+ k->set_inner_classes(Universe::the_empty_short_array());
+ cfs->guarantee_more(2, CHECK); // attributes_count
+ u2 attributes_count = cfs->get_u2_fast();
+ bool parsed_sourcefile_attribute = false;
+ bool parsed_innerclasses_attribute = false;
+ bool parsed_enclosingmethod_attribute = false;
+ u1* runtime_visible_annotations = NULL;
+ int runtime_visible_annotations_length = 0;
+ u1* runtime_invisible_annotations = NULL;
+ int runtime_invisible_annotations_length = 0;
+ // Iterate over attributes
+ while (attributes_count--) {
+ cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
+ u2 attribute_name_index = cfs->get_u2_fast();
+ u4 attribute_length = cfs->get_u4_fast();
+ check_property(
+ valid_cp_range(attribute_name_index, cp->length()) &&
+ cp->tag_at(attribute_name_index).is_utf8(),
+ "Attribute name has bad constant pool index %u in class file %s",
+ attribute_name_index, CHECK);
+ symbolOop tag = cp->symbol_at(attribute_name_index);
+ if (tag == vmSymbols::tag_source_file()) {
+ // Check for SourceFile tag
+ if (_need_verify) {
+ guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK);
+ }
+ if (parsed_sourcefile_attribute) {
+ classfile_parse_error("Multiple SourceFile attributes in class file %s", CHECK);
+ } else {
+ parsed_sourcefile_attribute = true;
+ }
+ parse_classfile_sourcefile_attribute(cp, k, CHECK);
+ } else if (tag == vmSymbols::tag_source_debug_extension()) {
+ // Check for SourceDebugExtension tag
+ parse_classfile_source_debug_extension_attribute(cp, k, (int)attribute_length, CHECK);
+ } else if (tag == vmSymbols::tag_inner_classes()) {
+ // Check for InnerClasses tag
+ if (parsed_innerclasses_attribute) {
+ classfile_parse_error("Multiple InnerClasses attributes in class file %s", CHECK);
+ } else {
+ parsed_innerclasses_attribute = true;
+ }
+ u2 num_of_classes = parse_classfile_inner_classes_attribute(cp, k, CHECK);
+ if (_need_verify && _major_version >= JAVA_1_5_VERSION) {
+ guarantee_property(attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes,
+ "Wrong InnerClasses attribute length in class file %s", CHECK);
+ }
+ } else if (tag == vmSymbols::tag_synthetic()) {
+ // Check for Synthetic tag
+ // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec
+ if (attribute_length != 0) {
+ classfile_parse_error(
+ "Invalid Synthetic classfile attribute length %u in class file %s",
+ attribute_length, CHECK);
+ }
+ parse_classfile_synthetic_attribute(cp, k, CHECK);
+ } else if (tag == vmSymbols::tag_deprecated()) {
+ // Check for Deprecatd tag - 4276120
+ if (attribute_length != 0) {
+ classfile_parse_error(
+ "Invalid Deprecated classfile attribute length %u in class file %s",
+ attribute_length, CHECK);
+ }
+ } else if (_major_version >= JAVA_1_5_VERSION) {
+ if (tag == vmSymbols::tag_signature()) {
+ if (attribute_length != 2) {
+ classfile_parse_error(
+ "Wrong Signature attribute length %u in class file %s",
+ attribute_length, CHECK);
+ }
+ parse_classfile_signature_attribute(cp, k, CHECK);
+ } else if (tag == vmSymbols::tag_runtime_visible_annotations()) {
+ runtime_visible_annotations_length = attribute_length;
+ runtime_visible_annotations = cfs->get_u1_buffer();
+ assert(runtime_visible_annotations != NULL, "null visible annotations");
+ cfs->skip_u1(runtime_visible_annotations_length, CHECK);
+ } else if (PreserveAllAnnotations && tag == vmSymbols::tag_runtime_invisible_annotations()) {
+ runtime_invisible_annotations_length = attribute_length;
+ runtime_invisible_annotations = cfs->get_u1_buffer();
+ assert(runtime_invisible_annotations != NULL, "null invisible annotations");
+ cfs->skip_u1(runtime_invisible_annotations_length, CHECK);
+ } else if (tag == vmSymbols::tag_enclosing_method()) {
+ if (parsed_enclosingmethod_attribute) {
+ classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", CHECK);
+ } else {
+ parsed_enclosingmethod_attribute = true;
+ }
+ cfs->guarantee_more(4, CHECK); // class_index, method_index
+ u2 class_index = cfs->get_u2_fast();
+ u2 method_index = cfs->get_u2_fast();
+ if (class_index == 0) {
+ classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", CHECK);
+ }
+ // Validate the constant pool indices and types
+ if (!cp->is_within_bounds(class_index) ||
+ !cp->tag_at(class_index).is_klass_reference()) {
+ classfile_parse_error("Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK);
+ }
+ if (method_index != 0 &&
+ (!cp->is_within_bounds(method_index) ||
+ !cp->tag_at(method_index).is_name_and_type())) {
+ classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", CHECK);
+ }
+ k->set_enclosing_method_indices(class_index, method_index);
+ } else {
+ // Unknown attribute
+ cfs->skip_u1(attribute_length, CHECK);
+ }
+ } else {
+ // Unknown attribute
+ cfs->skip_u1(attribute_length, CHECK);
+ }
+ }
+ typeArrayHandle annotations = assemble_annotations(runtime_visible_annotations,
+ runtime_visible_annotations_length,
+ runtime_invisible_annotations,
+ runtime_invisible_annotations_length,
+ CHECK);
+ k->set_class_annotations(annotations());
+}
+
+
+typeArrayHandle ClassFileParser::assemble_annotations(u1* runtime_visible_annotations,
+ int runtime_visible_annotations_length,
+ u1* runtime_invisible_annotations,
+ int runtime_invisible_annotations_length, TRAPS) {
+ typeArrayHandle annotations;
+ if (runtime_visible_annotations != NULL ||
+ runtime_invisible_annotations != NULL) {
+ typeArrayOop anno = oopFactory::new_permanent_byteArray(runtime_visible_annotations_length +
+ runtime_invisible_annotations_length, CHECK_(annotations));
+ annotations = typeArrayHandle(THREAD, anno);
+ if (runtime_visible_annotations != NULL) {
+ memcpy(annotations->byte_at_addr(0), runtime_visible_annotations, runtime_visible_annotations_length);
+ }
+ if (runtime_invisible_annotations != NULL) {
+ memcpy(annotations->byte_at_addr(runtime_visible_annotations_length), runtime_invisible_annotations, runtime_invisible_annotations_length);
+ }
+ }
+ return annotations;
+}
+
+
+static void initialize_static_field(fieldDescriptor* fd, TRAPS) {
+ KlassHandle h_k (THREAD, fd->field_holder());
+ assert(h_k.not_null() && fd->is_static(), "just checking");
+ if (fd->has_initial_value()) {
+ BasicType t = fd->field_type();
+ switch (t) {
+ case T_BYTE:
+ h_k()->byte_field_put(fd->offset(), fd->int_initial_value());
+ break;
+ case T_BOOLEAN:
+ h_k()->bool_field_put(fd->offset(), fd->int_initial_value());
+ break;
+ case T_CHAR:
+ h_k()->char_field_put(fd->offset(), fd->int_initial_value());
+ break;
+ case T_SHORT:
+ h_k()->short_field_put(fd->offset(), fd->int_initial_value());
+ break;
+ case T_INT:
+ h_k()->int_field_put(fd->offset(), fd->int_initial_value());
+ break;
+ case T_FLOAT:
+ h_k()->float_field_put(fd->offset(), fd->float_initial_value());
+ break;
+ case T_DOUBLE:
+ h_k()->double_field_put(fd->offset(), fd->double_initial_value());
+ break;
+ case T_LONG:
+ h_k()->long_field_put(fd->offset(), fd->long_initial_value());
+ break;
+ case T_OBJECT:
+ {
+ #ifdef ASSERT
+ symbolOop sym = oopFactory::new_symbol("Ljava/lang/String;", CHECK);
+ assert(fd->signature() == sym, "just checking");
+ #endif
+ oop string = fd->string_initial_value(CHECK);
+ h_k()->obj_field_put(fd->offset(), string);
+ }
+ break;
+ default:
+ THROW_MSG(vmSymbols::java_lang_ClassFormatError(),
+ "Illegal ConstantValue attribute in class file");
+ }
+ }
+}
+
+
+void ClassFileParser::java_lang_ref_Reference_fix_pre(typeArrayHandle* fields_ptr,
+ constantPoolHandle cp, FieldAllocationCount *fac_ptr, TRAPS) {
+ // This code is for compatibility with earlier jdk's that do not
+ // have the "discovered" field in java.lang.ref.Reference. For 1.5
+ // the check for the "discovered" field should issue a warning if
+ // the field is not found. For 1.6 this code should be issue a
+ // fatal error if the "discovered" field is not found.
+ //
+ // Increment fac.nonstatic_oop_count so that the start of the
+ // next type of non-static oops leaves room for the fake oop.
+ // Do not increment next_nonstatic_oop_offset so that the
+ // fake oop is place after the java.lang.ref.Reference oop
+ // fields.
+ //
+ // Check the fields in java.lang.ref.Reference for the "discovered"
+ // field. If it is not present, artifically create a field for it.
+ // This allows this VM to run on early JDK where the field is not
+ // present.
+
+ //
+ // Increment fac.nonstatic_oop_count so that the start of the
+ // next type of non-static oops leaves room for the fake oop.
+ // Do not increment next_nonstatic_oop_offset so that the
+ // fake oop is place after the java.lang.ref.Reference oop
+ // fields.
+ //
+ // Check the fields in java.lang.ref.Reference for the "discovered"
+ // field. If it is not present, artifically create a field for it.
+ // This allows this VM to run on early JDK where the field is not
+ // present.
+ int reference_sig_index = 0;
+ int reference_name_index = 0;
+ int reference_index = 0;
+ int extra = java_lang_ref_Reference::number_of_fake_oop_fields;
+ const int n = (*fields_ptr)()->length();
+ for (int i = 0; i < n; i += instanceKlass::next_offset ) {
+ int name_index =
+ (*fields_ptr)()->ushort_at(i + instanceKlass::name_index_offset);
+ int sig_index =
+ (*fields_ptr)()->ushort_at(i + instanceKlass::signature_index_offset);
+ symbolOop f_name = cp->symbol_at(name_index);
+ symbolOop f_sig = cp->symbol_at(sig_index);
+ if (f_sig == vmSymbols::reference_signature() && reference_index == 0) {
+ // Save the index for reference signature for later use.
+ // The fake discovered field does not entries in the
+ // constant pool so the index for its signature cannot
+ // be extracted from the constant pool. It will need
+ // later, however. It's signature is vmSymbols::reference_signature()
+ // so same an index for that signature.
+ reference_sig_index = sig_index;
+ reference_name_index = name_index;
+ reference_index = i;
+ }
+ if (f_name == vmSymbols::reference_discovered_name() &&
+ f_sig == vmSymbols::reference_signature()) {
+ // The values below are fake but will force extra
+ // non-static oop fields and a corresponding non-static
+ // oop map block to be allocated.
+ extra = 0;
+ break;
+ }
+ }
+ if (extra != 0) {
+ fac_ptr->nonstatic_oop_count += extra;
+ // Add the additional entry to "fields" so that the klass
+ // contains the "discoverd" field and the field will be initialized
+ // in instances of the object.
+ int fields_with_fix_length = (*fields_ptr)()->length() +
+ instanceKlass::next_offset;
+ typeArrayOop ff = oopFactory::new_permanent_shortArray(
+ fields_with_fix_length, CHECK);
+ typeArrayHandle fields_with_fix(THREAD, ff);
+
+ // Take everything from the original but the length.
+ for (int idx = 0; idx < (*fields_ptr)->length(); idx++) {
+ fields_with_fix->ushort_at_put(idx, (*fields_ptr)->ushort_at(idx));
+ }
+
+ // Add the fake field at the end.
+ int i = (*fields_ptr)->length();
+ // There is no name index for the fake "discovered" field nor
+ // signature but a signature is needed so that the field will
+ // be properly initialized. Use one found for
+ // one of the other reference fields. Be sure the index for the
+ // name is 0. In fieldDescriptor::initialize() the index of the
+ // name is checked. That check is by passed for the last nonstatic
+ // oop field in a java.lang.ref.Reference which is assumed to be
+ // this artificial "discovered" field. An assertion checks that
+ // the name index is 0.
+ assert(reference_index != 0, "Missing signature for reference");
+
+ int j;
+ for (j = 0; j < instanceKlass::next_offset; j++) {
+ fields_with_fix->ushort_at_put(i + j,
+ (*fields_ptr)->ushort_at(reference_index +j));
+ }
+ // Clear the public access flag and set the private access flag.
+ short flags;
+ flags =
+ fields_with_fix->ushort_at(i + instanceKlass::access_flags_offset);
+ assert(!(flags & JVM_RECOGNIZED_FIELD_MODIFIERS), "Unexpected access flags set");
+ flags = flags & (~JVM_ACC_PUBLIC);
+ flags = flags | JVM_ACC_PRIVATE;
+ AccessFlags access_flags;
+ access_flags.set_flags(flags);
+ assert(!access_flags.is_public(), "Failed to clear public flag");
+ assert(access_flags.is_private(), "Failed to set private flag");
+ fields_with_fix->ushort_at_put(i + instanceKlass::access_flags_offset,
+ flags);
+
+ assert(fields_with_fix->ushort_at(i + instanceKlass::name_index_offset)
+ == reference_name_index, "The fake reference name is incorrect");
+ assert(fields_with_fix->ushort_at(i + instanceKlass::signature_index_offset)
+ == reference_sig_index, "The fake reference signature is incorrect");
+ // The type of the field is stored in the low_offset entry during
+ // parsing.
+ assert(fields_with_fix->ushort_at(i + instanceKlass::low_offset) ==
+ NONSTATIC_OOP, "The fake reference type is incorrect");
+
+ // "fields" is allocated in the permanent generation. Disgard
+ // it and let it be collected.
+ (*fields_ptr) = fields_with_fix;
+ }
+ return;
+}
+
+
+void ClassFileParser::java_lang_Class_fix_pre(objArrayHandle* methods_ptr,
+ FieldAllocationCount *fac_ptr, TRAPS) {
+ // Add fake fields for java.lang.Class instances
+ //
+ // This is not particularly nice. We should consider adding a
+ // private transient object field at the Java level to
+ // java.lang.Class. Alternatively we could add a subclass of
+ // instanceKlass which provides an accessor and size computer for
+ // this field, but that appears to be more code than this hack.
+ //
+ // NOTE that we wedge these in at the beginning rather than the
+ // end of the object because the Class layout changed between JDK
+ // 1.3 and JDK 1.4 with the new reflection implementation; some
+ // nonstatic oop fields were added at the Java level. The offsets
+ // of these fake fields can't change between these two JDK
+ // versions because when the offsets are computed at bootstrap
+ // time we don't know yet which version of the JDK we're running in.
+
+ // The values below are fake but will force two non-static oop fields and
+ // a corresponding non-static oop map block to be allocated.
+ const int extra = java_lang_Class::number_of_fake_oop_fields;
+ fac_ptr->nonstatic_oop_count += extra;
+}
+
+
+void ClassFileParser::java_lang_Class_fix_post(int* next_nonstatic_oop_offset_ptr) {
+ // Cause the extra fake fields in java.lang.Class to show up before
+ // the Java fields for layout compatibility between 1.3 and 1.4
+ // Incrementing next_nonstatic_oop_offset here advances the
+ // location where the real java fields are placed.
+ const int extra = java_lang_Class::number_of_fake_oop_fields;
+ (*next_nonstatic_oop_offset_ptr) += (extra * wordSize);
+}
+
+
+instanceKlassHandle ClassFileParser::parseClassFile(symbolHandle name,
+ Handle class_loader,
+ Handle protection_domain,
+ symbolHandle& parsed_name,
+ TRAPS) {
+ // So that JVMTI can cache class file in the state before retransformable agents
+ // have modified it
+ unsigned char *cached_class_file_bytes = NULL;
+ jint cached_class_file_length;
+
+ ClassFileStream* cfs = stream();
+ // Timing
+ PerfTraceTime vmtimer(ClassLoader::perf_accumulated_time());
+
+ _has_finalizer = _has_empty_finalizer = _has_vanilla_constructor = false;
+
+ if (JvmtiExport::should_post_class_file_load_hook()) {
+ unsigned char* ptr = cfs->buffer();
+ unsigned char* end_ptr = cfs->buffer() + cfs->length();
+
+ JvmtiExport::post_class_file_load_hook(name, class_loader, protection_domain,
+ &ptr, &end_ptr,
+ &cached_class_file_bytes,
+ &cached_class_file_length);
+
+ if (ptr != cfs->buffer()) {
+ // JVMTI agent has modified class file data.
+ // Set new class file stream using JVMTI agent modified
+ // class file data.
+ cfs = new ClassFileStream(ptr, end_ptr - ptr, cfs->source());
+ set_stream(cfs);
+ }
+ }
+
+
+ instanceKlassHandle nullHandle;
+
+ // Figure out whether we can skip format checking (matching classic VM behavior)
+ _need_verify = Verifier::should_verify_for(class_loader());
+
+ // Set the verify flag in stream
+ cfs->set_verify(_need_verify);
+
+ // Save the class file name for easier error message printing.
+ _class_name = name.not_null()? name : vmSymbolHandles::unknown_class_name();
+
+ cfs->guarantee_more(8, CHECK_(nullHandle)); // magic, major, minor
+ // Magic value
+ u4 magic = cfs->get_u4_fast();
+ guarantee_property(magic == JAVA_CLASSFILE_MAGIC,
+ "Incompatible magic value %u in class file %s",
+ magic, CHECK_(nullHandle));
+
+ // Version numbers
+ u2 minor_version = cfs->get_u2_fast();
+ u2 major_version = cfs->get_u2_fast();
+
+ // Check version numbers - we check this even with verifier off
+ if (!is_supported_version(major_version, minor_version)) {
+ if (name.is_null()) {
+ Exceptions::fthrow(
+ THREAD_AND_LOCATION,
+ vmSymbolHandles::java_lang_UnsupportedClassVersionError(),
+ "Unsupported major.minor version %u.%u",
+ major_version,
+ minor_version);
+ } else {
+ ResourceMark rm(THREAD);
+ Exceptions::fthrow(
+ THREAD_AND_LOCATION,
+ vmSymbolHandles::java_lang_UnsupportedClassVersionError(),
+ "%s : Unsupported major.minor version %u.%u",
+ name->as_C_string(),
+ major_version,
+ minor_version);
+ }
+ return nullHandle;
+ }
+
+ _major_version = major_version;
+ _minor_version = minor_version;
+
+
+ // Check if verification needs to be relaxed for this class file
+ // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376)
+ _relax_verify = Verifier::relax_verify_for(class_loader());
+
+ // Constant pool
+ constantPoolHandle cp = parse_constant_pool(CHECK_(nullHandle));
+ int cp_size = cp->length();
+
+ cfs->guarantee_more(8, CHECK_(nullHandle)); // flags, this_class, super_class, infs_len
+
+ // Access flags
+ AccessFlags access_flags;
+ jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_CLASS_MODIFIERS;
+
+ if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
+ // Set abstract bit for old class files for backward compatibility
+ flags |= JVM_ACC_ABSTRACT;
+ }
+ verify_legal_class_modifiers(flags, CHECK_(nullHandle));
+ access_flags.set_flags(flags);
+
+ // This class and superclass
+ instanceKlassHandle super_klass;
+ u2 this_class_index = cfs->get_u2_fast();
+ check_property(
+ valid_cp_range(this_class_index, cp_size) &&
+ cp->tag_at(this_class_index).is_unresolved_klass(),
+ "Invalid this class index %u in constant pool in class file %s",
+ this_class_index, CHECK_(nullHandle));
+
+ symbolHandle class_name (THREAD, cp->unresolved_klass_at(this_class_index));
+ assert(class_name.not_null(), "class_name can't be null");
+
+ // It's important to set parsed_name *before* resolving the super class.
+ // (it's used for cleanup by the caller if parsing fails)
+ parsed_name = class_name;
+
+ // Update _class_name which could be null previously to be class_name
+ _class_name = class_name;
+
+ // Don't need to check whether this class name is legal or not.
+ // It has been checked when constant pool is parsed.
+ // However, make sure it is not an array type.
+ if (_need_verify) {
+ guarantee_property(class_name->byte_at(0) != JVM_SIGNATURE_ARRAY,
+ "Bad class name in class file %s",
+ CHECK_(nullHandle));
+ }
+
+ klassOop preserve_this_klass; // for storing result across HandleMark
+
+ // release all handles when parsing is done
+ { HandleMark hm(THREAD);
+
+ // Checks if name in class file matches requested name
+ if (name.not_null() && class_name() != name()) {
+ ResourceMark rm(THREAD);
+ Exceptions::fthrow(
+ THREAD_AND_LOCATION,
+ vmSymbolHandles::java_lang_NoClassDefFoundError(),
+ "%s (wrong name: %s)",
+ name->as_C_string(),
+ class_name->as_C_string()
+ );
+ return nullHandle;
+ }
+
+ if (TraceClassLoadingPreorder) {
+ tty->print("[Loading %s", name()->as_klass_external_name());
+ if (cfs->source() != NULL) tty->print(" from %s", cfs->source());
+ tty->print_cr("]");
+ }
+
+ u2 super_class_index = cfs->get_u2_fast();
+ if (super_class_index == 0) {
+ check_property(class_name() == vmSymbols::java_lang_Object(),
+ "Invalid superclass index %u in class file %s",
+ super_class_index,
+ CHECK_(nullHandle));
+ } else {
+ check_property(valid_cp_range(super_class_index, cp_size) &&
+ cp->tag_at(super_class_index).is_unresolved_klass(),
+ "Invalid superclass index %u in class file %s",
+ super_class_index,
+ CHECK_(nullHandle));
+ // The class name should be legal because it is checked when parsing constant pool.
+ // However, make sure it is not an array type.
+ if (_need_verify) {
+ guarantee_property(cp->unresolved_klass_at(super_class_index)->byte_at(0) != JVM_SIGNATURE_ARRAY,
+ "Bad superclass name in class file %s", CHECK_(nullHandle));
+ }
+ }
+
+ // Interfaces
+ u2 itfs_len = cfs->get_u2_fast();
+ objArrayHandle local_interfaces;
+ if (itfs_len == 0) {
+ local_interfaces = objArrayHandle(THREAD, Universe::the_empty_system_obj_array());
+ } else {
+ local_interfaces = parse_interfaces(cp, itfs_len, class_loader, protection_domain, &vmtimer, _class_name, CHECK_(nullHandle));
+ }
+
+ // Fields (offsets are filled in later)
+ struct FieldAllocationCount fac = {0,0,0,0,0,0,0,0,0,0};
+ objArrayHandle fields_annotations;
+ typeArrayHandle fields = parse_fields(cp, access_flags.is_interface(), &fac, &fields_annotations, CHECK_(nullHandle));
+ // Methods
+ bool has_final_method = false;
+ AccessFlags promoted_flags;
+ promoted_flags.set_flags(0);
+ // These need to be oop pointers because they are allocated lazily
+ // inside parse_methods inside a nested HandleMark
+ objArrayOop methods_annotations_oop = NULL;
+ objArrayOop methods_parameter_annotations_oop = NULL;
+ objArrayOop methods_default_annotations_oop = NULL;
+ objArrayHandle methods = parse_methods(cp, access_flags.is_interface(),
+ &promoted_flags,
+ &has_final_method,
+ &methods_annotations_oop,
+ &methods_parameter_annotations_oop,
+ &methods_default_annotations_oop,
+ CHECK_(nullHandle));
+
+ objArrayHandle methods_annotations(THREAD, methods_annotations_oop);
+ objArrayHandle methods_parameter_annotations(THREAD, methods_parameter_annotations_oop);
+ objArrayHandle methods_default_annotations(THREAD, methods_default_annotations_oop);
+
+ // We check super class after class file is parsed and format is checked
+ if (super_class_index > 0) {
+ symbolHandle sk (THREAD, cp->klass_name_at(super_class_index));
+ if (access_flags.is_interface()) {
+ // Before attempting to resolve the superclass, check for class format
+ // errors not checked yet.
+ guarantee_property(sk() == vmSymbols::java_lang_Object(),
+ "Interfaces must have java.lang.Object as superclass in class file %s",
+ CHECK_(nullHandle));
+ }
+ klassOop k = SystemDictionary::resolve_super_or_fail(class_name,
+ sk,
+ class_loader,
+ protection_domain,
+ true,
+ CHECK_(nullHandle));
+ KlassHandle kh (THREAD, k);
+ super_klass = instanceKlassHandle(THREAD, kh());
+ if (super_klass->is_interface()) {
+ ResourceMark rm(THREAD);
+ Exceptions::fthrow(
+ THREAD_AND_LOCATION,
+ vmSymbolHandles::java_lang_IncompatibleClassChangeError(),
+ "class %s has interface %s as super class",
+ class_name->as_klass_external_name(),
+ super_klass->external_name()
+ );
+ return nullHandle;
+ }
+ // Make sure super class is not final
+ if (super_klass->is_final()) {
+ THROW_MSG_(vmSymbols::java_lang_VerifyError(), "Cannot inherit from final class", nullHandle);
+ }
+ }
+
+ // Compute the transitive list of all unique interfaces implemented by this class
+ objArrayHandle transitive_interfaces = compute_transitive_interfaces(super_klass, local_interfaces, CHECK_(nullHandle));
+
+ // sort methods
+ typeArrayHandle method_ordering = sort_methods(methods,
+ methods_annotations,
+ methods_parameter_annotations,
+ methods_default_annotations,
+ CHECK_(nullHandle));
+
+ // promote flags from parse_methods() to the klass' flags
+ access_flags.add_promoted_flags(promoted_flags.as_int());
+
+ // Size of Java vtable (in words)
+ int vtable_size = 0;
+ int itable_size = 0;
+ int num_miranda_methods = 0;
+
+ klassVtable::compute_vtable_size_and_num_mirandas(vtable_size,
+ num_miranda_methods,
+ super_klass(),
+ methods(),
+ access_flags,
+ class_loader(),
+ class_name(),
+ local_interfaces());
+
+ // Size of Java itable (in words)
+ itable_size = access_flags.is_interface() ? 0 : klassItable::compute_itable_size(transitive_interfaces);
+
+ // Field size and offset computation
+ int nonstatic_field_size = super_klass() == NULL ? 0 : super_klass->nonstatic_field_size();
+#ifndef PRODUCT
+ int orig_nonstatic_field_size = 0;
+#endif
+ int static_field_size = 0;
+ int next_static_oop_offset;
+ int next_static_double_offset;
+ int next_static_word_offset;
+ int next_static_short_offset;
+ int next_static_byte_offset;
+ int next_static_type_offset;
+ int next_nonstatic_oop_offset;
+ int next_nonstatic_double_offset;
+ int next_nonstatic_word_offset;
+ int next_nonstatic_short_offset;
+ int next_nonstatic_byte_offset;
+ int next_nonstatic_type_offset;
+ int first_nonstatic_oop_offset;
+ int first_nonstatic_field_offset;
+ int next_nonstatic_field_offset;
+
+ // Calculate the starting byte offsets
+ next_static_oop_offset = (instanceKlass::header_size() +
+ align_object_offset(vtable_size) +
+ align_object_offset(itable_size)) * wordSize;
+ next_static_double_offset = next_static_oop_offset +
+ (fac.static_oop_count * oopSize);
+ if ( fac.static_double_count &&
+ (Universe::field_type_should_be_aligned(T_DOUBLE) ||
+ Universe::field_type_should_be_aligned(T_LONG)) ) {
+ next_static_double_offset = align_size_up(next_static_double_offset, BytesPerLong);
+ }
+
+ next_static_word_offset = next_static_double_offset +
+ (fac.static_double_count * BytesPerLong);
+ next_static_short_offset = next_static_word_offset +
+ (fac.static_word_count * BytesPerInt);
+ next_static_byte_offset = next_static_short_offset +
+ (fac.static_short_count * BytesPerShort);
+ next_static_type_offset = align_size_up((next_static_byte_offset +
+ fac.static_byte_count ), wordSize );
+ static_field_size = (next_static_type_offset -
+ next_static_oop_offset) / wordSize;
+ first_nonstatic_field_offset = (instanceOopDesc::header_size() +
+ nonstatic_field_size) * wordSize;
+ next_nonstatic_field_offset = first_nonstatic_field_offset;
+
+ // Add fake fields for java.lang.Class instances (also see below)
+ if (class_name() == vmSymbols::java_lang_Class() && class_loader.is_null()) {
+ java_lang_Class_fix_pre(&methods, &fac, CHECK_(nullHandle));
+ }
+
+ // Add a fake "discovered" field if it is not present
+ // for compatibility with earlier jdk's.
+ if (class_name() == vmSymbols::java_lang_ref_Reference()
+ && class_loader.is_null()) {
+ java_lang_ref_Reference_fix_pre(&fields, cp, &fac, CHECK_(nullHandle));
+ }
+ // end of "discovered" field compactibility fix
+
+ int nonstatic_double_count = fac.nonstatic_double_count;
+ int nonstatic_word_count = fac.nonstatic_word_count;
+ int nonstatic_short_count = fac.nonstatic_short_count;
+ int nonstatic_byte_count = fac.nonstatic_byte_count;
+ int nonstatic_oop_count = fac.nonstatic_oop_count;
+
+ // Prepare list of oops for oop maps generation.
+ u2* nonstatic_oop_offsets;
+ u2* nonstatic_oop_length;
+ int nonstatic_oop_map_count = 0;
+
+ nonstatic_oop_offsets = NEW_RESOURCE_ARRAY_IN_THREAD(
+ THREAD, u2, nonstatic_oop_count+1);
+ nonstatic_oop_length = NEW_RESOURCE_ARRAY_IN_THREAD(
+ THREAD, u2, nonstatic_oop_count+1);
+
+ // Add fake fields for java.lang.Class instances (also see above).
+ // FieldsAllocationStyle and CompactFields values will be reset to default.
+ if(class_name() == vmSymbols::java_lang_Class() && class_loader.is_null()) {
+ java_lang_Class_fix_post(&next_nonstatic_field_offset);
+ nonstatic_oop_offsets[0] = (u2)first_nonstatic_field_offset;
+ int fake_oop_count = (( next_nonstatic_field_offset -
+ first_nonstatic_field_offset ) / oopSize);
+ nonstatic_oop_length [0] = (u2)fake_oop_count;
+ nonstatic_oop_map_count = 1;
+ nonstatic_oop_count -= fake_oop_count;
+ first_nonstatic_oop_offset = first_nonstatic_field_offset;
+ } else {
+ first_nonstatic_oop_offset = 0; // will be set for first oop field
+ }
+
+#ifndef PRODUCT
+ if( PrintCompactFieldsSavings ) {
+ next_nonstatic_double_offset = next_nonstatic_field_offset +
+ (nonstatic_oop_count * oopSize);
+ if ( nonstatic_double_count > 0 ) {
+ next_nonstatic_double_offset = align_size_up(next_nonstatic_double_offset, BytesPerLong);
+ }
+ next_nonstatic_word_offset = next_nonstatic_double_offset +
+ (nonstatic_double_count * BytesPerLong);
+ next_nonstatic_short_offset = next_nonstatic_word_offset +
+ (nonstatic_word_count * BytesPerInt);
+ next_nonstatic_byte_offset = next_nonstatic_short_offset +
+ (nonstatic_short_count * BytesPerShort);
+ next_nonstatic_type_offset = align_size_up((next_nonstatic_byte_offset +
+ nonstatic_byte_count ), wordSize );
+ orig_nonstatic_field_size = nonstatic_field_size +
+ ((next_nonstatic_type_offset - first_nonstatic_field_offset)/wordSize);
+ }
+#endif
+ bool compact_fields = CompactFields;
+ int allocation_style = FieldsAllocationStyle;
+ if( allocation_style < 0 || allocation_style > 1 ) { // Out of range?
+ assert(false, "0 <= FieldsAllocationStyle <= 1");
+ allocation_style = 1; // Optimistic
+ }
+
+ // The next classes have predefined hard-coded fields offsets
+ // (see in JavaClasses::compute_hard_coded_offsets()).
+ // Use default fields allocation order for them.
+ if( (allocation_style != 0 || compact_fields ) && class_loader.is_null() &&
+ (class_name() == vmSymbols::java_lang_AssertionStatusDirectives() ||
+ class_name() == vmSymbols::java_lang_Class() ||
+ class_name() == vmSymbols::java_lang_ClassLoader() ||
+ class_name() == vmSymbols::java_lang_ref_Reference() ||
+ class_name() == vmSymbols::java_lang_ref_SoftReference() ||
+ class_name() == vmSymbols::java_lang_StackTraceElement() ||
+ class_name() == vmSymbols::java_lang_String() ||
+ class_name() == vmSymbols::java_lang_Throwable()) ) {
+ allocation_style = 0; // Allocate oops first
+ compact_fields = false; // Don't compact fields
+ }
+
+ if( allocation_style == 0 ) {
+ // Fields order: oops, longs/doubles, ints, shorts/chars, bytes
+ next_nonstatic_oop_offset = next_nonstatic_field_offset;
+ next_nonstatic_double_offset = next_nonstatic_oop_offset +
+ (nonstatic_oop_count * oopSize);
+ } else if( allocation_style == 1 ) {
+ // Fields order: longs/doubles, ints, shorts/chars, bytes, oops
+ next_nonstatic_double_offset = next_nonstatic_field_offset;
+ } else {
+ ShouldNotReachHere();
+ }
+
+ int nonstatic_oop_space_count = 0;
+ int nonstatic_word_space_count = 0;
+ int nonstatic_short_space_count = 0;
+ int nonstatic_byte_space_count = 0;
+ int nonstatic_oop_space_offset;
+ int nonstatic_word_space_offset;
+ int nonstatic_short_space_offset;
+ int nonstatic_byte_space_offset;
+
+ if( nonstatic_double_count > 0 ) {
+ int offset = next_nonstatic_double_offset;
+ next_nonstatic_double_offset = align_size_up(offset, BytesPerLong);
+ if( compact_fields && offset != next_nonstatic_double_offset ) {
+ // Allocate available fields into the gap before double field.
+ int length = next_nonstatic_double_offset - offset;
+ assert(length == BytesPerInt, "");
+ nonstatic_word_space_offset = offset;
+ if( nonstatic_word_count > 0 ) {
+ nonstatic_word_count -= 1;
+ nonstatic_word_space_count = 1; // Only one will fit
+ length -= BytesPerInt;
+ offset += BytesPerInt;
+ }
+ nonstatic_short_space_offset = offset;
+ while( length >= BytesPerShort && nonstatic_short_count > 0 ) {
+ nonstatic_short_count -= 1;
+ nonstatic_short_space_count += 1;
+ length -= BytesPerShort;
+ offset += BytesPerShort;
+ }
+ nonstatic_byte_space_offset = offset;
+ while( length > 0 && nonstatic_byte_count > 0 ) {
+ nonstatic_byte_count -= 1;
+ nonstatic_byte_space_count += 1;
+ length -= 1;
+ }
+ // Allocate oop field in the gap if there are no other fields for that.
+ nonstatic_oop_space_offset = offset;
+ if( length >= oopSize && nonstatic_oop_count > 0 &&
+ allocation_style != 0 ) { // when oop fields not first
+ nonstatic_oop_count -= 1;
+ nonstatic_oop_space_count = 1; // Only one will fit
+ length -= oopSize;
+ offset += oopSize;
+ }
+ }
+ }
+
+ next_nonstatic_word_offset = next_nonstatic_double_offset +
+ (nonstatic_double_count * BytesPerLong);
+ next_nonstatic_short_offset = next_nonstatic_word_offset +
+ (nonstatic_word_count * BytesPerInt);
+ next_nonstatic_byte_offset = next_nonstatic_short_offset +
+ (nonstatic_short_count * BytesPerShort);
+
+ int notaligned_offset;
+ if( allocation_style == 0 ) {
+ notaligned_offset = next_nonstatic_byte_offset + nonstatic_byte_count;
+ } else { // allocation_style == 1
+ next_nonstatic_oop_offset = next_nonstatic_byte_offset + nonstatic_byte_count;
+ if( nonstatic_oop_count > 0 ) {
+ notaligned_offset = next_nonstatic_oop_offset;
+ next_nonstatic_oop_offset = align_size_up(next_nonstatic_oop_offset, oopSize);
+ }
+ notaligned_offset = next_nonstatic_oop_offset + (nonstatic_oop_count * oopSize);
+ }
+ next_nonstatic_type_offset = align_size_up(notaligned_offset, wordSize );
+ nonstatic_field_size = nonstatic_field_size + ((next_nonstatic_type_offset
+ - first_nonstatic_field_offset)/wordSize);
+
+ // Iterate over fields again and compute correct offsets.
+ // The field allocation type was temporarily stored in the offset slot.
+ // oop fields are located before non-oop fields (static and non-static).
+ int len = fields->length();
+ for (int i = 0; i < len; i += instanceKlass::next_offset) {
+ int real_offset;
+ FieldAllocationType atype = (FieldAllocationType) fields->ushort_at(i+4);
+ switch (atype) {
+ case STATIC_OOP:
+ real_offset = next_static_oop_offset;
+ next_static_oop_offset += oopSize;
+ break;
+ case STATIC_BYTE:
+ real_offset = next_static_byte_offset;
+ next_static_byte_offset += 1;
+ break;
+ case STATIC_SHORT:
+ real_offset = next_static_short_offset;
+ next_static_short_offset += BytesPerShort;
+ break;
+ case STATIC_WORD:
+ real_offset = next_static_word_offset;
+ next_static_word_offset += BytesPerInt;
+ break;
+ case STATIC_ALIGNED_DOUBLE:
+ case STATIC_DOUBLE:
+ real_offset = next_static_double_offset;
+ next_static_double_offset += BytesPerLong;
+ break;
+ case NONSTATIC_OOP:
+ if( nonstatic_oop_space_count > 0 ) {
+ real_offset = nonstatic_oop_space_offset;
+ nonstatic_oop_space_offset += oopSize;
+ nonstatic_oop_space_count -= 1;
+ } else {
+ real_offset = next_nonstatic_oop_offset;
+ next_nonstatic_oop_offset += oopSize;
+ }
+ // Update oop maps
+ if( nonstatic_oop_map_count > 0 &&
+ nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
+ (u2)(real_offset - nonstatic_oop_length[nonstatic_oop_map_count - 1] * oopSize) ) {
+ // Extend current oop map
+ nonstatic_oop_length[nonstatic_oop_map_count - 1] += 1;
+ } else {
+ // Create new oop map
+ nonstatic_oop_offsets[nonstatic_oop_map_count] = (u2)real_offset;
+ nonstatic_oop_length [nonstatic_oop_map_count] = 1;
+ nonstatic_oop_map_count += 1;
+ if( first_nonstatic_oop_offset == 0 ) { // Undefined
+ first_nonstatic_oop_offset = real_offset;
+ }
+ }
+ break;
+ case NONSTATIC_BYTE:
+ if( nonstatic_byte_space_count > 0 ) {
+ real_offset = nonstatic_byte_space_offset;
+ nonstatic_byte_space_offset += 1;
+ nonstatic_byte_space_count -= 1;
+ } else {
+ real_offset = next_nonstatic_byte_offset;
+ next_nonstatic_byte_offset += 1;
+ }
+ break;
+ case NONSTATIC_SHORT:
+ if( nonstatic_short_space_count > 0 ) {
+ real_offset = nonstatic_short_space_offset;
+ nonstatic_short_space_offset += BytesPerShort;
+ nonstatic_short_space_count -= 1;
+ } else {
+ real_offset = next_nonstatic_short_offset;
+ next_nonstatic_short_offset += BytesPerShort;
+ }
+ break;
+ case NONSTATIC_WORD:
+ if( nonstatic_word_space_count > 0 ) {
+ real_offset = nonstatic_word_space_offset;
+ nonstatic_word_space_offset += BytesPerInt;
+ nonstatic_word_space_count -= 1;
+ } else {
+ real_offset = next_nonstatic_word_offset;
+ next_nonstatic_word_offset += BytesPerInt;
+ }
+ break;
+ case NONSTATIC_ALIGNED_DOUBLE:
+ case NONSTATIC_DOUBLE:
+ real_offset = next_nonstatic_double_offset;
+ next_nonstatic_double_offset += BytesPerLong;
+ break;
+ default:
+ ShouldNotReachHere();
+ }
+ fields->short_at_put(i+4, extract_low_short_from_int(real_offset) );
+ fields->short_at_put(i+5, extract_high_short_from_int(real_offset) );
+ }
+
+ // Size of instances
+ int instance_size;
+
+ instance_size = align_object_size(next_nonstatic_type_offset / wordSize);
+
+ assert(instance_size == align_object_size(instanceOopDesc::header_size() + nonstatic_field_size), "consistent layout helper value");
+
+ // Size of non-static oop map blocks (in words) allocated at end of klass
+ int nonstatic_oop_map_size = compute_oop_map_size(super_klass, nonstatic_oop_map_count, first_nonstatic_oop_offset);
+
+ // Compute reference type
+ ReferenceType rt;
+ if (super_klass() == NULL) {
+ rt = REF_NONE;
+ } else {
+ rt = super_klass->reference_type();
+ }
+
+ // We can now create the basic klassOop for this klass
+ klassOop ik = oopFactory::new_instanceKlass(
+ vtable_size, itable_size,
+ static_field_size, nonstatic_oop_map_size,
+ rt, CHECK_(nullHandle));
+ instanceKlassHandle this_klass (THREAD, ik);
+
+ assert(this_klass->static_field_size() == static_field_size &&
+ this_klass->nonstatic_oop_map_size() == nonstatic_oop_map_size, "sanity check");
+
+ // Fill in information already parsed
+ this_klass->set_access_flags(access_flags);
+ jint lh = Klass::instance_layout_helper(instance_size, false);
+ this_klass->set_layout_helper(lh);
+ assert(this_klass->oop_is_instance(), "layout is correct");
+ assert(this_klass->size_helper() == instance_size, "correct size_helper");
+ // Not yet: supers are done below to support the new subtype-checking fields
+ //this_klass->set_super(super_klass());
+ this_klass->set_class_loader(class_loader());
+ this_klass->set_nonstatic_field_size(nonstatic_field_size);
+ this_klass->set_static_oop_field_size(fac.static_oop_count);
+ cp->set_pool_holder(this_klass());
+ this_klass->set_constants(cp());
+ this_klass->set_local_interfaces(local_interfaces());
+ this_klass->set_fields(fields());
+ this_klass->set_methods(methods());
+ if (has_final_method) {
+ this_klass->set_has_final_method();
+ }
+ this_klass->set_method_ordering(method_ordering());
+ this_klass->set_initial_method_idnum(methods->length());
+ this_klass->set_name(cp->klass_name_at(this_class_index));
+ this_klass->set_protection_domain(protection_domain());
+ this_klass->set_fields_annotations(fields_annotations());
+ this_klass->set_methods_annotations(methods_annotations());
+ this_klass->set_methods_parameter_annotations(methods_parameter_annotations());
+ this_klass->set_methods_default_annotations(methods_default_annotations());
+
+ this_klass->set_minor_version(minor_version);
+ this_klass->set_major_version(major_version);
+
+ if (cached_class_file_bytes != NULL) {
+ // JVMTI: we have an instanceKlass now, tell it about the cached bytes
+ this_klass->set_cached_class_file(cached_class_file_bytes,
+ cached_class_file_length);
+ }
+
+ // Miranda methods
+ if ((num_miranda_methods > 0) ||
+ // if this class introduced new miranda methods or
+ (super_klass.not_null() && (super_klass->has_miranda_methods()))
+ // super class exists and this class inherited miranda methods
+ ) {
+ this_klass->set_has_miranda_methods(); // then set a flag
+ }
+
+ // Additional attributes
+ parse_classfile_attributes(cp, this_klass, CHECK_(nullHandle));
+
+ // Make sure this is the end of class file stream
+ guarantee_property(cfs->at_eos(), "Extra bytes at the end of class file %s", CHECK_(nullHandle));
+
+ // Initialize static fields
+ this_klass->do_local_static_fields(&initialize_static_field, CHECK_(nullHandle));
+
+ // VerifyOops believes that once this has been set, the object is completely loaded.
+ // Compute transitive closure of interfaces this class implements
+ this_klass->set_transitive_interfaces(transitive_interfaces());
+
+ // Fill in information needed to compute superclasses.
+ this_klass->initialize_supers(super_klass(), CHECK_(nullHandle));
+
+ // Initialize itable offset tables
+ klassItable::setup_itable_offset_table(this_klass);
+
+ // Do final class setup
+ fill_oop_maps(this_klass, nonstatic_oop_map_count, nonstatic_oop_offsets, nonstatic_oop_length);
+
+ set_precomputed_flags(this_klass);
+
+ // reinitialize modifiers, using the InnerClasses attribute
+ int computed_modifiers = this_klass->compute_modifier_flags(CHECK_(nullHandle));
+ this_klass->set_modifier_flags(computed_modifiers);
+
+ // check if this class can access its super class
+ check_super_class_access(this_klass, CHECK_(nullHandle));
+
+ // check if this class can access its superinterfaces
+ check_super_interface_access(this_klass, CHECK_(nullHandle));
+
+ // check if this class overrides any final method
+ check_final_method_override(this_klass, CHECK_(nullHandle));
+
+ // check that if this class is an interface then it doesn't have static methods
+ if (this_klass->is_interface()) {
+ check_illegal_static_method(this_klass, CHECK_(nullHandle));
+ }
+
+ ClassLoadingService::notify_class_loaded(instanceKlass::cast(this_klass()),
+ false /* not shared class */);
+
+ if (TraceClassLoading) {
+ // print in a single call to reduce interleaving of output
+ if (cfs->source() != NULL) {
+ tty->print("[Loaded %s from %s]\n", this_klass->external_name(),
+ cfs->source());
+ } else if (class_loader.is_null()) {
+ if (THREAD->is_Java_thread()) {
+ klassOop caller = ((JavaThread*)THREAD)->security_get_caller_class(1);
+ tty->print("[Loaded %s by instance of %s]\n",
+ this_klass->external_name(),
+ instanceKlass::cast(caller)->external_name());
+ } else {
+ tty->print("[Loaded %s]\n", this_klass->external_name());
+ }
+ } else {
+ ResourceMark rm;
+ tty->print("[Loaded %s from %s]\n", this_klass->external_name(),
+ instanceKlass::cast(class_loader->klass())->external_name());
+ }
+ }
+
+ if (TraceClassResolution) {
+ // print out the superclass.
+ const char * from = Klass::cast(this_klass())->external_name();
+ if (this_klass->java_super() != NULL) {
+ tty->print("RESOLVE %s %s\n", from, instanceKlass::cast(this_klass->java_super())->external_name());
+ }
+ // print out each of the interface classes referred to by this class.
+ objArrayHandle local_interfaces(THREAD, this_klass->local_interfaces());
+ if (!local_interfaces.is_null()) {
+ int length = local_interfaces->length();
+ for (int i = 0; i < length; i++) {
+ klassOop k = klassOop(local_interfaces->obj_at(i));
+ instanceKlass* to_class = instanceKlass::cast(k);
+ const char * to = to_class->external_name();
+ tty->print("RESOLVE %s %s\n", from, to);
+ }
+ }
+ }
+
+#ifndef PRODUCT
+ if( PrintCompactFieldsSavings ) {
+ if( nonstatic_field_size < orig_nonstatic_field_size ) {
+ tty->print("[Saved %d of %3d words in %s]\n",
+ orig_nonstatic_field_size - nonstatic_field_size,
+ orig_nonstatic_field_size, this_klass->external_name());
+ } else if( nonstatic_field_size > orig_nonstatic_field_size ) {
+ tty->print("[Wasted %d over %3d words in %s]\n",
+ nonstatic_field_size - orig_nonstatic_field_size,
+ orig_nonstatic_field_size, this_klass->external_name());
+ }
+ }
+#endif
+
+ // preserve result across HandleMark
+ preserve_this_klass = this_klass();
+ }
+
+ // Create new handle outside HandleMark
+ instanceKlassHandle this_klass (THREAD, preserve_this_klass);
+ debug_only(this_klass->as_klassOop()->verify();)
+
+ return this_klass;
+}
+
+
+int ClassFileParser::compute_oop_map_size(instanceKlassHandle super, int nonstatic_oop_map_count, int first_nonstatic_oop_offset) {
+ int map_size = super.is_null() ? 0 : super->nonstatic_oop_map_size();
+ if (nonstatic_oop_map_count > 0) {
+ // We have oops to add to map
+ if (map_size == 0) {
+ map_size = nonstatic_oop_map_count;
+ } else {
+ // Check whether we should add a new map block or whether the last one can be extended
+ OopMapBlock* first_map = super->start_of_nonstatic_oop_maps();
+ OopMapBlock* last_map = first_map + map_size - 1;
+
+ int next_offset = last_map->offset() + (last_map->length() * oopSize);
+ if (next_offset == first_nonstatic_oop_offset) {
+ // There is no gap bettwen superklass's last oop field and first
+ // local oop field, merge maps.
+ nonstatic_oop_map_count -= 1;
+ } else {
+ // Superklass didn't end with a oop field, add extra maps
+ assert(next_offset<first_nonstatic_oop_offset, "just checking");
+ }
+ map_size += nonstatic_oop_map_count;
+ }
+ }
+ return map_size;
+}
+
+
+void ClassFileParser::fill_oop_maps(instanceKlassHandle k,
+ int nonstatic_oop_map_count,
+ u2* nonstatic_oop_offsets, u2* nonstatic_oop_length) {
+ OopMapBlock* this_oop_map = k->start_of_nonstatic_oop_maps();
+ OopMapBlock* last_oop_map = this_oop_map + k->nonstatic_oop_map_size();
+ instanceKlass* super = k->superklass();
+ if (super != NULL) {
+ int super_oop_map_size = super->nonstatic_oop_map_size();
+ OopMapBlock* super_oop_map = super->start_of_nonstatic_oop_maps();
+ // Copy maps from superklass
+ while (super_oop_map_size-- > 0) {
+ *this_oop_map++ = *super_oop_map++;
+ }
+ }
+ if (nonstatic_oop_map_count > 0) {
+ if (this_oop_map + nonstatic_oop_map_count > last_oop_map) {
+ // Calculated in compute_oop_map_size() number of oop maps is less then
+ // collected oop maps since there is no gap between superklass's last oop
+ // field and first local oop field. Extend the last oop map copied
+ // from the superklass instead of creating new one.
+ nonstatic_oop_map_count--;
+ nonstatic_oop_offsets++;
+ this_oop_map--;
+ this_oop_map->set_length(this_oop_map->length() + *nonstatic_oop_length++);
+ this_oop_map++;
+ }
+ assert((this_oop_map + nonstatic_oop_map_count) == last_oop_map, "just checking");
+ // Add new map blocks, fill them
+ while (nonstatic_oop_map_count-- > 0) {
+ this_oop_map->set_offset(*nonstatic_oop_offsets++);
+ this_oop_map->set_length(*nonstatic_oop_length++);
+ this_oop_map++;
+ }
+ }
+}
+
+
+void ClassFileParser::set_precomputed_flags(instanceKlassHandle k) {
+ klassOop super = k->super();
+
+ // Check if this klass has an empty finalize method (i.e. one with return bytecode only),
+ // in which case we don't have to register objects as finalizable
+ if (!_has_empty_finalizer) {
+ if (_has_finalizer ||
+ (super != NULL && super->klass_part()->has_finalizer())) {
+ k->set_has_finalizer();
+ }
+ }
+
+#ifdef ASSERT
+ bool f = false;
+ methodOop m = k->lookup_method(vmSymbols::finalize_method_name(),
+ vmSymbols::void_method_signature());
+ if (m != NULL && !m->is_empty_method()) {
+ f = true;
+ }
+ assert(f == k->has_finalizer(), "inconsistent has_finalizer");
+#endif
+
+ // Check if this klass supports the java.lang.Cloneable interface
+ if (SystemDictionary::cloneable_klass_loaded()) {
+ if (k->is_subtype_of(SystemDictionary::cloneable_klass())) {
+ k->set_is_cloneable();
+ }
+ }
+
+ // Check if this klass has a vanilla default constructor
+ if (super == NULL) {
+ // java.lang.Object has empty default constructor
+ k->set_has_vanilla_constructor();
+ } else {
+ if (Klass::cast(super)->has_vanilla_constructor() &&
+ _has_vanilla_constructor) {
+ k->set_has_vanilla_constructor();
+ }
+#ifdef ASSERT
+ bool v = false;
+ if (Klass::cast(super)->has_vanilla_constructor()) {
+ methodOop constructor = k->find_method(vmSymbols::object_initializer_name(
+), vmSymbols::void_method_signature());
+ if (constructor != NULL && constructor->is_vanilla_constructor()) {
+ v = true;
+ }
+ }
+ assert(v == k->has_vanilla_constructor(), "inconsistent has_vanilla_constructor");
+#endif
+ }
+
+ // If it cannot be fast-path allocated, set a bit in the layout helper.
+ // See documentation of instanceKlass::can_be_fastpath_allocated().
+ assert(k->size_helper() > 0, "layout_helper is initialized");
+ if ((!RegisterFinalizersAtInit && k->has_finalizer())
+ || k->is_abstract() || k->is_interface()
+ || (k->name() == vmSymbols::java_lang_Class()
+ && k->class_loader() == NULL)
+ || k->size_helper() >= FastAllocateSizeLimit) {
+ // Forbid fast-path allocation.
+ jint lh = Klass::instance_layout_helper(k->size_helper(), true);
+ k->set_layout_helper(lh);
+ }
+}
+
+
+// utility method for appending and array with check for duplicates
+
+void append_interfaces(objArrayHandle result, int& index, objArrayOop ifs) {
+ // iterate over new interfaces
+ for (int i = 0; i < ifs->length(); i++) {
+ oop e = ifs->obj_at(i);
+ assert(e->is_klass() && instanceKlass::cast(klassOop(e))->is_interface(), "just checking");
+ // check for duplicates
+ bool duplicate = false;
+ for (int j = 0; j < index; j++) {
+ if (result->obj_at(j) == e) {
+ duplicate = true;
+ break;
+ }
+ }
+ // add new interface
+ if (!duplicate) {
+ result->obj_at_put(index++, e);
+ }
+ }
+}
+
+objArrayHandle ClassFileParser::compute_transitive_interfaces(instanceKlassHandle super, objArrayHandle local_ifs, TRAPS) {
+ // Compute maximum size for transitive interfaces
+ int max_transitive_size = 0;
+ int super_size = 0;
+ // Add superclass transitive interfaces size
+ if (super.not_null()) {
+ super_size = super->transitive_interfaces()->length();
+ max_transitive_size += super_size;
+ }
+ // Add local interfaces' super interfaces
+ int local_size = local_ifs->length();
+ for (int i = 0; i < local_size; i++) {
+ klassOop l = klassOop(local_ifs->obj_at(i));
+ max_transitive_size += instanceKlass::cast(l)->transitive_interfaces()->length();
+ }
+ // Finally add local interfaces
+ max_transitive_size += local_size;
+ // Construct array
+ objArrayHandle result;
+ if (max_transitive_size == 0) {
+ // no interfaces, use canonicalized array
+ result = objArrayHandle(THREAD, Universe::the_empty_system_obj_array());
+ } else if (max_transitive_size == super_size) {
+ // no new local interfaces added, share superklass' transitive interface array
+ result = objArrayHandle(THREAD, super->transitive_interfaces());
+ } else if (max_transitive_size == local_size) {
+ // only local interfaces added, share local interface array
+ result = local_ifs;
+ } else {
+ objArrayHandle nullHandle;
+ objArrayOop new_objarray = oopFactory::new_system_objArray(max_transitive_size, CHECK_(nullHandle));
+ result = objArrayHandle(THREAD, new_objarray);
+ int index = 0;
+ // Copy down from superclass
+ if (super.not_null()) {
+ append_interfaces(result, index, super->transitive_interfaces());
+ }
+ // Copy down from local interfaces' superinterfaces
+ for (int i = 0; i < local_ifs->length(); i++) {
+ klassOop l = klassOop(local_ifs->obj_at(i));
+ append_interfaces(result, index, instanceKlass::cast(l)->transitive_interfaces());
+ }
+ // Finally add local interfaces
+ append_interfaces(result, index, local_ifs());
+
+ // Check if duplicates were removed
+ if (index != max_transitive_size) {
+ assert(index < max_transitive_size, "just checking");
+ objArrayOop new_result = oopFactory::new_system_objArray(index, CHECK_(nullHandle));
+ for (int i = 0; i < index; i++) {
+ oop e = result->obj_at(i);
+ assert(e != NULL, "just checking");
+ new_result->obj_at_put(i, e);
+ }
+ result = objArrayHandle(THREAD, new_result);
+ }
+ }
+ return result;
+}
+
+
+void ClassFileParser::check_super_class_access(instanceKlassHandle this_klass, TRAPS) {
+ klassOop super = this_klass->super();
+ if ((super != NULL) &&
+ (!Reflection::verify_class_access(this_klass->as_klassOop(), super, false))) {
+ ResourceMark rm(THREAD);
+ Exceptions::fthrow(
+ THREAD_AND_LOCATION,
+ vmSymbolHandles::java_lang_IllegalAccessError(),
+ "class %s cannot access its superclass %s",
+ this_klass->external_name(),
+ instanceKlass::cast(super)->external_name()
+ );
+ return;
+ }
+}
+
+
+void ClassFileParser::check_super_interface_access(instanceKlassHandle this_klass, TRAPS) {
+ objArrayHandle local_interfaces (THREAD, this_klass->local_interfaces());
+ int lng = local_interfaces->length();
+ for (int i = lng - 1; i >= 0; i--) {
+ klassOop k = klassOop(local_interfaces->obj_at(i));
+ assert (k != NULL && Klass::cast(k)->is_interface(), "invalid interface");
+ if (!Reflection::verify_class_access(this_klass->as_klassOop(), k, false)) {
+ ResourceMark rm(THREAD);
+ Exceptions::fthrow(
+ THREAD_AND_LOCATION,
+ vmSymbolHandles::java_lang_IllegalAccessError(),
+ "class %s cannot access its superinterface %s",
+ this_klass->external_name(),
+ instanceKlass::cast(k)->external_name()
+ );
+ return;
+ }
+ }
+}
+
+
+void ClassFileParser::check_final_method_override(instanceKlassHandle this_klass, TRAPS) {
+ objArrayHandle methods (THREAD, this_klass->methods());
+ int num_methods = methods->length();
+
+ // go thru each method and check if it overrides a final method
+ for (int index = 0; index < num_methods; index++) {
+ methodOop m = (methodOop)methods->obj_at(index);
+
+ // skip private, static and <init> methods
+ if ((!m->is_private()) &&
+ (!m->is_static()) &&
+ (m->name() != vmSymbols::object_initializer_name())) {
+
+ symbolOop name = m->name();
+ symbolOop signature = m->signature();
+ klassOop k = this_klass->super();
+ methodOop super_m = NULL;
+ while (k != NULL) {
+ // skip supers that don't have final methods.
+ if (k->klass_part()->has_final_method()) {
+ // lookup a matching method in the super class hierarchy
+ super_m = instanceKlass::cast(k)->lookup_method(name, signature);
+ if (super_m == NULL) {
+ break; // didn't find any match; get out
+ }
+
+ if (super_m->is_final() &&
+ // matching method in super is final
+ (Reflection::verify_field_access(this_klass->as_klassOop(),
+ super_m->method_holder(),
+ super_m->method_holder(),
+ super_m->access_flags(), false))
+ // this class can access super final method and therefore override
+ ) {
+ ResourceMark rm(THREAD);
+ Exceptions::fthrow(
+ THREAD_AND_LOCATION,
+ vmSymbolHandles::java_lang_VerifyError(),
+ "class %s overrides final method %s.%s",
+ this_klass->external_name(),
+ name->as_C_string(),
+ signature->as_C_string()
+ );
+ return;
+ }
+
+ // continue to look from super_m's holder's super.
+ k = instanceKlass::cast(super_m->method_holder())->super();
+ continue;
+ }
+
+ k = k->klass_part()->super();
+ }
+ }
+ }
+}
+
+
+// assumes that this_klass is an interface
+void ClassFileParser::check_illegal_static_method(instanceKlassHandle this_klass, TRAPS) {
+ assert(this_klass->is_interface(), "not an interface");
+ objArrayHandle methods (THREAD, this_klass->methods());
+ int num_methods = methods->length();
+
+ for (int index = 0; index < num_methods; index++) {
+ methodOop m = (methodOop)methods->obj_at(index);
+ // if m is static and not the init method, throw a verify error
+ if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) {
+ ResourceMark rm(THREAD);
+ Exceptions::fthrow(
+ THREAD_AND_LOCATION,
+ vmSymbolHandles::java_lang_VerifyError(),
+ "Illegal static method %s in interface %s",
+ m->name()->as_C_string(),
+ this_klass->external_name()
+ );
+ return;
+ }
+ }
+}
+
+// utility methods for format checking
+
+void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) {
+ if (!_need_verify) { return; }
+
+ const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0;
+ const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
+ const bool is_final = (flags & JVM_ACC_FINAL) != 0;
+ const bool is_super = (flags & JVM_ACC_SUPER) != 0;
+ const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
+ const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0;
+ const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
+
+ if ((is_abstract && is_final) ||
+ (is_interface && !is_abstract) ||
+ (is_interface && major_gte_15 && (is_super || is_enum)) ||
+ (!is_interface && major_gte_15 && is_annotation)) {
+ ResourceMark rm(THREAD);
+ Exceptions::fthrow(
+ THREAD_AND_LOCATION,
+ vmSymbolHandles::java_lang_ClassFormatError(),
+ "Illegal class modifiers in class %s: 0x%X",
+ _class_name->as_C_string(), flags
+ );
+ return;
+ }
+}
+
+bool ClassFileParser::has_illegal_visibility(jint flags) {
+ const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
+ const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
+ const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
+
+ return ((is_public && is_protected) ||
+ (is_public && is_private) ||
+ (is_protected && is_private));
+}
+
+bool ClassFileParser::is_supported_version(u2 major, u2 minor) {
+ return (major >= JAVA_MIN_SUPPORTED_VERSION) &&
+ (major <= JAVA_MAX_SUPPORTED_VERSION) &&
+ ((major != JAVA_MAX_SUPPORTED_VERSION) ||
+ (minor <= JAVA_MAX_SUPPORTED_MINOR_VERSION));
+}
+
+void ClassFileParser::verify_legal_field_modifiers(
+ jint flags, bool is_interface, TRAPS) {
+ if (!_need_verify) { return; }
+
+ const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
+ const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
+ const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
+ const bool is_static = (flags & JVM_ACC_STATIC) != 0;
+ const bool is_final = (flags & JVM_ACC_FINAL) != 0;
+ const bool is_volatile = (flags & JVM_ACC_VOLATILE) != 0;
+ const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0;
+ const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
+ const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
+
+ bool is_illegal = false;
+
+ if (is_interface) {
+ if (!is_public || !is_static || !is_final || is_private ||
+ is_protected || is_volatile || is_transient ||
+ (major_gte_15 && is_enum)) {
+ is_illegal = true;
+ }
+ } else { // not interface
+ if (has_illegal_visibility(flags) || (is_final && is_volatile)) {
+ is_illegal = true;
+ }
+ }
+
+ if (is_illegal) {
+ ResourceMark rm(THREAD);
+ Exceptions::fthrow(
+ THREAD_AND_LOCATION,
+ vmSymbolHandles::java_lang_ClassFormatError(),
+ "Illegal field modifiers in class %s: 0x%X",
+ _class_name->as_C_string(), flags);
+ return;
+ }
+}
+
+void ClassFileParser::verify_legal_method_modifiers(
+ jint flags, bool is_interface, symbolHandle name, TRAPS) {
+ if (!_need_verify) { return; }
+
+ const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
+ const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
+ const bool is_static = (flags & JVM_ACC_STATIC) != 0;
+ const bool is_final = (flags & JVM_ACC_FINAL) != 0;
+ const bool is_native = (flags & JVM_ACC_NATIVE) != 0;
+ const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
+ const bool is_bridge = (flags & JVM_ACC_BRIDGE) != 0;
+ const bool is_strict = (flags & JVM_ACC_STRICT) != 0;
+ const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0;
+ const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
+ const bool is_initializer = (name == vmSymbols::object_initializer_name());
+
+ bool is_illegal = false;
+
+ if (is_interface) {
+ if (!is_abstract || !is_public || is_static || is_final ||
+ is_native || (major_gte_15 && (is_synchronized || is_strict))) {
+ is_illegal = true;
+ }
+ } else { // not interface
+ if (is_initializer) {
+ if (is_static || is_final || is_synchronized || is_native ||
+ is_abstract || (major_gte_15 && is_bridge)) {
+ is_illegal = true;
+ }
+ } else { // not initializer
+ if (is_abstract) {
+ if ((is_final || is_native || is_private || is_static ||
+ (major_gte_15 && (is_synchronized || is_strict)))) {
+ is_illegal = true;
+ }
+ }
+ if (has_illegal_visibility(flags)) {
+ is_illegal = true;
+ }
+ }
+ }
+
+ if (is_illegal) {
+ ResourceMark rm(THREAD);
+ Exceptions::fthrow(
+ THREAD_AND_LOCATION,
+ vmSymbolHandles::java_lang_ClassFormatError(),
+ "Method %s in class %s has illegal modifiers: 0x%X",
+ name->as_C_string(), _class_name->as_C_string(), flags);
+ return;
+ }
+}
+
+void ClassFileParser::verify_legal_utf8(const unsigned char* buffer, int length, TRAPS) {
+ assert(_need_verify, "only called when _need_verify is true");
+ int i = 0;
+ int count = length >> 2;
+ for (int k=0; k<count; k++) {
+ unsigned char b0 = buffer[i];
+ unsigned char b1 = buffer[i+1];
+ unsigned char b2 = buffer[i+2];
+ unsigned char b3 = buffer[i+3];
+ // For an unsigned char v,
+ // (v | v - 1) is < 128 (highest bit 0) for 0 < v < 128;
+ // (v | v - 1) is >= 128 (highest bit 1) for v == 0 or v >= 128.
+ unsigned char res = b0 | b0 - 1 |
+ b1 | b1 - 1 |
+ b2 | b2 - 1 |
+ b3 | b3 - 1;
+ if (res >= 128) break;
+ i += 4;
+ }
+ for(; i < length; i++) {
+ unsigned short c;
+ // no embedded zeros
+ guarantee_property((buffer[i] != 0), "Illegal UTF8 string in constant pool in class file %s", CHECK);
+ if(buffer[i] < 128) {
+ continue;
+ }
+ if ((i + 5) < length) { // see if it's legal supplementary character
+ if (UTF8::is_supplementary_character(&buffer[i])) {
+ c = UTF8::get_supplementary_character(&buffer[i]);
+ i += 5;
+ continue;
+ }
+ }
+ switch (buffer[i] >> 4) {
+ default: break;
+ case 0x8: case 0x9: case 0xA: case 0xB: case 0xF:
+ classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
+ case 0xC: case 0xD: // 110xxxxx 10xxxxxx
+ c = (buffer[i] & 0x1F) << 6;
+ i++;
+ if ((i < length) && ((buffer[i] & 0xC0) == 0x80)) {
+ c += buffer[i] & 0x3F;
+ if (_major_version <= 47 || c == 0 || c >= 0x80) {
+ // for classes with major > 47, c must a null or a character in its shortest form
+ break;
+ }
+ }
+ classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
+ case 0xE: // 1110xxxx 10xxxxxx 10xxxxxx
+ c = (buffer[i] & 0xF) << 12;
+ i += 2;
+ if ((i < length) && ((buffer[i-1] & 0xC0) == 0x80) && ((buffer[i] & 0xC0) == 0x80)) {
+ c += ((buffer[i-1] & 0x3F) << 6) + (buffer[i] & 0x3F);
+ if (_major_version <= 47 || c >= 0x800) {
+ // for classes with major > 47, c must be in its shortest form
+ break;
+ }
+ }
+ classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
+ } // end of switch
+ } // end of for
+}
+
+// Checks if name is a legal class name.
+void ClassFileParser::verify_legal_class_name(symbolHandle name, TRAPS) {
+ if (!_need_verify || _relax_verify) { return; }
+
+ char buf[fixed_buffer_size];
+ char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
+ unsigned int length = name->utf8_length();
+ bool legal = false;
+
+ if (length > 0) {
+ char* p;
+ if (bytes[0] == JVM_SIGNATURE_ARRAY) {
+ p = skip_over_field_signature(bytes, false, length, CHECK);
+ legal = (p != NULL) && ((p - bytes) == (int)length);
+ } else if (_major_version < JAVA_1_5_VERSION) {
+ if (bytes[0] != '<') {
+ p = skip_over_field_name(bytes, true, length);
+ legal = (p != NULL) && ((p - bytes) == (int)length);
+ }
+ } else {
+ // 4900761: relax the constraints based on JSR202 spec
+ // Class names may be drawn from the entire Unicode character set.
+ // Identifiers between '/' must be unqualified names.
+ // The utf8 string has been verified when parsing cpool entries.
+ legal = verify_unqualified_name(bytes, length, LegalClass);
+ }
+ }
+ if (!legal) {
+ ResourceMark rm(THREAD);
+ Exceptions::fthrow(
+ THREAD_AND_LOCATION,
+ vmSymbolHandles::java_lang_ClassFormatError(),
+ "Illegal class name \"%s\" in class file %s", bytes,
+ _class_name->as_C_string()
+ );
+ return;
+ }
+}
+
+// Checks if name is a legal field name.
+void ClassFileParser::verify_legal_field_name(symbolHandle name, TRAPS) {
+ if (!_need_verify || _relax_verify) { return; }
+
+ char buf[fixed_buffer_size];
+ char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
+ unsigned int length = name->utf8_length();
+ bool legal = false;
+
+ if (length > 0) {
+ if (_major_version < JAVA_1_5_VERSION) {
+ if (bytes[0] != '<') {
+ char* p = skip_over_field_name(bytes, false, length);
+ legal = (p != NULL) && ((p - bytes) == (int)length);
+ }
+ } else {
+ // 4881221: relax the constraints based on JSR202 spec
+ legal = verify_unqualified_name(bytes, length, LegalField);
+ }
+ }
+
+ if (!legal) {
+ ResourceMark rm(THREAD);
+ Exceptions::fthrow(
+ THREAD_AND_LOCATION,
+ vmSymbolHandles::java_lang_ClassFormatError(),
+ "Illegal field name \"%s\" in class %s", bytes,
+ _class_name->as_C_string()
+ );
+ return;
+ }
+}
+
+// Checks if name is a legal method name.
+void ClassFileParser::verify_legal_method_name(symbolHandle name, TRAPS) {
+ if (!_need_verify || _relax_verify) { return; }
+
+ assert(!name.is_null(), "method name is null");
+ char buf[fixed_buffer_size];
+ char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
+ unsigned int length = name->utf8_length();
+ bool legal = false;
+
+ if (length > 0) {
+ if (bytes[0] == '<') {
+ if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) {
+ legal = true;
+ }
+ } else if (_major_version < JAVA_1_5_VERSION) {
+ char* p;
+ p = skip_over_field_name(bytes, false, length);
+ legal = (p != NULL) && ((p - bytes) == (int)length);
+ } else {
+ // 4881221: relax the constraints based on JSR202 spec
+ legal = verify_unqualified_name(bytes, length, LegalMethod);
+ }
+ }
+
+ if (!legal) {
+ ResourceMark rm(THREAD);
+ Exceptions::fthrow(
+ THREAD_AND_LOCATION,
+ vmSymbolHandles::java_lang_ClassFormatError(),
+ "Illegal method name \"%s\" in class %s", bytes,
+ _class_name->as_C_string()
+ );
+ return;
+ }
+}
+
+
+// Checks if signature is a legal field signature.
+void ClassFileParser::verify_legal_field_signature(symbolHandle name, symbolHandle signature, TRAPS) {
+ if (!_need_verify) { return; }
+
+ char buf[fixed_buffer_size];
+ char* bytes = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
+ unsigned int length = signature->utf8_length();
+ char* p = skip_over_field_signature(bytes, false, length, CHECK);
+
+ if (p == NULL || (p - bytes) != (int)length) {
+ ResourceMark rm(THREAD);
+ Exceptions::fthrow(
+ THREAD_AND_LOCATION,
+ vmSymbolHandles::java_lang_ClassFormatError(),
+ "Field \"%s\" in class %s has illegal signature \"%s\"",
+ name->as_C_string(), _class_name->as_C_string(), bytes
+ );
+ return;
+ }
+}
+
+// Checks if signature is a legal method signature.
+// Returns number of parameters
+int ClassFileParser::verify_legal_method_signature(symbolHandle name, symbolHandle signature, TRAPS) {
+ if (!_need_verify) {
+ // make sure caller's args_size will be less than 0 even for non-static
+ // method so it will be recomputed in compute_size_of_parameters().
+ return -2;
+ }
+
+ unsigned int args_size = 0;
+ char buf[fixed_buffer_size];
+ char* p = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
+ unsigned int length = signature->utf8_length();
+ char* nextp;
+
+ // The first character must be a '('
+ if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) {
+ length--;
+ // Skip over legal field signatures
+ nextp = skip_over_field_signature(p, false, length, CHECK_0);
+ while ((length > 0) && (nextp != NULL)) {
+ args_size++;
+ if (p[0] == 'J' || p[0] == 'D') {
+ args_size++;
+ }
+ length -= nextp - p;
+ p = nextp;
+ nextp = skip_over_field_signature(p, false, length, CHECK_0);
+ }
+ // The first non-signature thing better be a ')'
+ if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) {
+ length--;
+ if (name->utf8_length() > 0 && name->byte_at(0) == '<') {
+ // All internal methods must return void
+ if ((length == 1) && (p[0] == JVM_SIGNATURE_VOID)) {
+ return args_size;
+ }
+ } else {
+ // Now we better just have a return value
+ nextp = skip_over_field_signature(p, true, length, CHECK_0);
+ if (nextp && ((int)length == (nextp - p))) {
+ return args_size;
+ }
+ }
+ }
+ }
+ // Report error
+ ResourceMark rm(THREAD);
+ Exceptions::fthrow(
+ THREAD_AND_LOCATION,
+ vmSymbolHandles::java_lang_ClassFormatError(),
+ "Method \"%s\" in class %s has illegal signature \"%s\"",
+ name->as_C_string(), _class_name->as_C_string(), p
+ );
+ return 0;
+}
+
+
+// Unqualified names may not contain the characters '.', ';', or '/'.
+// Method names also may not contain the characters '<' or '>', unless <init> or <clinit>.
+// Note that method names may not be <init> or <clinit> in this method.
+// Because these names have been checked as special cases before calling this method
+// in verify_legal_method_name.
+bool ClassFileParser::verify_unqualified_name(char* name, unsigned int length, int type) {
+ jchar ch;
+
+ for (char* p = name; p != name + length; ) {
+ ch = *p;
+ if (ch < 128) {
+ p++;
+ if (ch == '.' || ch == ';') {
+ return false; // do not permit '.' or ';'
+ }
+ if (type != LegalClass && ch == '/') {
+ return false; // do not permit '/' unless it's class name
+ }
+ if (type == LegalMethod && (ch == '<' || ch == '>')) {
+ return false; // do not permit '<' or '>' in method names
+ }
+ } else {
+ char* tmp_p = UTF8::next(p, &ch);
+ p = tmp_p;
+ }
+ }
+ return true;
+}
+
+
+// Take pointer to a string. Skip over the longest part of the string that could
+// be taken as a fieldname. Allow '/' if slash_ok is true.
+// Return a pointer to just past the fieldname.
+// Return NULL if no fieldname at all was found, or in the case of slash_ok
+// being true, we saw consecutive slashes (meaning we were looking for a
+// qualified path but found something that was badly-formed).
+char* ClassFileParser::skip_over_field_name(char* name, bool slash_ok, unsigned int length) {
+ char* p;
+ jchar ch;
+ jboolean last_is_slash = false;
+ jboolean not_first_ch = false;
+
+ for (p = name; p != name + length; not_first_ch = true) {
+ char* old_p = p;
+ ch = *p;
+ if (ch < 128) {
+ p++;
+ // quick check for ascii
+ if ((ch >= 'a' && ch <= 'z') ||
+ (ch >= 'A' && ch <= 'Z') ||
+ (ch == '_' || ch == '$') ||
+ (not_first_ch && ch >= '0' && ch <= '9')) {
+ last_is_slash = false;
+ continue;
+ }
+ if (slash_ok && ch == '/') {
+ if (last_is_slash) {
+ return NULL; // Don't permit consecutive slashes
+ }
+ last_is_slash = true;
+ continue;
+ }
+ } else {
+ jint unicode_ch;
+ char* tmp_p = UTF8::next_character(p, &unicode_ch);
+ p = tmp_p;
+ last_is_slash = false;
+ // Check if ch is Java identifier start or is Java identifier part
+ // 4672820: call java.lang.Character methods directly without generating separate tables.
+ EXCEPTION_MARK;
+ instanceKlassHandle klass (THREAD, SystemDictionary::char_klass());
+
+ // return value
+ JavaValue result(T_BOOLEAN);
+ // Set up the arguments to isJavaIdentifierStart and isJavaIdentifierPart
+ JavaCallArguments args;
+ args.push_int(unicode_ch);
+
+ // public static boolean isJavaIdentifierStart(char ch);
+ JavaCalls::call_static(&result,
+ klass,
+ vmSymbolHandles::isJavaIdentifierStart_name(),
+ vmSymbolHandles::int_bool_signature(),
+ &args,
+ THREAD);
+
+ if (HAS_PENDING_EXCEPTION) {
+ CLEAR_PENDING_EXCEPTION;
+ return 0;
+ }
+ if (result.get_jboolean()) {
+ continue;
+ }
+
+ if (not_first_ch) {
+ // public static boolean isJavaIdentifierPart(char ch);
+ JavaCalls::call_static(&result,
+ klass,
+ vmSymbolHandles::isJavaIdentifierPart_name(),
+ vmSymbolHandles::int_bool_signature(),
+ &args,
+ THREAD);
+
+ if (HAS_PENDING_EXCEPTION) {
+ CLEAR_PENDING_EXCEPTION;
+ return 0;
+ }
+
+ if (result.get_jboolean()) {
+ continue;
+ }
+ }
+ }
+ return (not_first_ch) ? old_p : NULL;
+ }
+ return (not_first_ch) ? p : NULL;
+}
+
+
+// Take pointer to a string. Skip over the longest part of the string that could
+// be taken as a field signature. Allow "void" if void_ok.
+// Return a pointer to just past the signature.
+// Return NULL if no legal signature is found.
+char* ClassFileParser::skip_over_field_signature(char* signature,
+ bool void_ok,
+ unsigned int length,
+ TRAPS) {
+ unsigned int array_dim = 0;
+ while (length > 0) {
+ switch (signature[0]) {
+ case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; }
+ case JVM_SIGNATURE_BOOLEAN:
+ case JVM_SIGNATURE_BYTE:
+ case JVM_SIGNATURE_CHAR:
+ case JVM_SIGNATURE_SHORT:
+ case JVM_SIGNATURE_INT:
+ case JVM_SIGNATURE_FLOAT:
+ case JVM_SIGNATURE_LONG:
+ case JVM_SIGNATURE_DOUBLE:
+ return signature + 1;
+ case JVM_SIGNATURE_CLASS: {
+ if (_major_version < JAVA_1_5_VERSION) {
+ // Skip over the class name if one is there
+ char* p = skip_over_field_name(signature + 1, true, --length);
+
+ // The next character better be a semicolon
+ if (p && (p - signature) > 1 && p[0] == ';') {
+ return p + 1;
+ }
+ } else {
+ // 4900761: For class version > 48, any unicode is allowed in class name.
+ length--;
+ signature++;
+ while (length > 0 && signature[0] != ';') {
+ if (signature[0] == '.') {
+ classfile_parse_error("Class name contains illegal character '.' in descriptor in class file %s", CHECK_0);
+ }
+ length--;
+ signature++;
+ }
+ if (signature[0] == ';') { return signature + 1; }
+ }
+
+ return NULL;
+ }
+ case JVM_SIGNATURE_ARRAY:
+ array_dim++;
+ if (array_dim > 255) {
+ // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions.
+ classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", CHECK_0);
+ }
+ // The rest of what's there better be a legal signature
+ signature++;
+ length--;
+ void_ok = false;
+ break;
+
+ default:
+ return NULL;
+ }
+ }
+ return NULL;
+}