--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/share/vm/classfile/classFileParser.cpp.orig Wed Oct 22 15:24:37 2014 -0700
@@ -0,0 +1,5274 @@
+/*
+ * Copyright (c) 1997, 2014, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+#include "precompiled.hpp"
+#include "classfile/classFileParser.hpp"
+#include "classfile/classLoader.hpp"
+#include "classfile/classLoaderData.hpp"
+#include "classfile/classLoaderData.inline.hpp"
+#include "classfile/defaultMethods.hpp"
+#include "classfile/javaClasses.hpp"
+#include "classfile/symbolTable.hpp"
+#include "classfile/systemDictionary.hpp"
+#if INCLUDE_CDS
+#include "classfile/systemDictionaryShared.hpp"
+#endif
+#include "classfile/verificationType.hpp"
+#include "classfile/verifier.hpp"
+#include "classfile/vmSymbols.hpp"
+#include "memory/allocation.hpp"
+#include "memory/gcLocker.hpp"
+#include "memory/metadataFactory.hpp"
+#include "memory/oopFactory.hpp"
+#include "memory/referenceType.hpp"
+#include "memory/universe.inline.hpp"
+#include "oops/constantPool.hpp"
+#include "oops/fieldStreams.hpp"
+#include "oops/instanceKlass.hpp"
+#include "oops/instanceMirrorKlass.hpp"
+#include "oops/klass.inline.hpp"
+#include "oops/klassVtable.hpp"
+#include "oops/method.hpp"
+#include "oops/symbol.hpp"
+#include "prims/jvm.h"
+#include "prims/jvmtiExport.hpp"
+#include "prims/jvmtiThreadState.hpp"
+#include "runtime/javaCalls.hpp"
+#include "runtime/perfData.hpp"
+#include "runtime/reflection.hpp"
+#include "runtime/signature.hpp"
+#include "runtime/timer.hpp"
+#include "services/classLoadingService.hpp"
+#include "services/threadService.hpp"
+#include "utilities/array.hpp"
+#include "utilities/globalDefinitions.hpp"
+#include "utilities/ostream.hpp"
+
+// 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 52
+#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
+// - also used as the max version when running in jdk6
+#define JAVA_6_VERSION 50
+
+// Used for backward compatibility reasons:
+// - to check NameAndType_info signatures more aggressively
+#define JAVA_7_VERSION 51
+
+// Extension method support.
+#define JAVA_8_VERSION 52
+
+void ClassFileParser::parse_constant_pool_entries(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
+ assert(cfs->allocated_on_stack(),"should be local");
+ u1* old_current = cfs0->current();
+#endif
+ Handle class_loader(THREAD, _loader_data->class_loader());
+
+ // 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_MethodHandle :
+ case JVM_CONSTANT_MethodType :
+ if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
+ classfile_parse_error(
+ "Class file version does not support constant tag %u in class file %s",
+ tag, CHECK);
+ }
+ if (tag == JVM_CONSTANT_MethodHandle) {
+ cfs->guarantee_more(4, CHECK); // ref_kind, method_index, tag/access_flags
+ u1 ref_kind = cfs->get_u1_fast();
+ u2 method_index = cfs->get_u2_fast();
+ _cp->method_handle_index_at_put(index, ref_kind, method_index);
+ } else if (tag == JVM_CONSTANT_MethodType) {
+ cfs->guarantee_more(3, CHECK); // signature_index, tag/access_flags
+ u2 signature_index = cfs->get_u2_fast();
+ _cp->method_type_index_at_put(index, signature_index);
+ } else {
+ ShouldNotReachHere();
+ }
+ break;
+ case JVM_CONSTANT_InvokeDynamic :
+ {
+ if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
+ classfile_parse_error(
+ "Class file version does not support constant tag %u in class file %s",
+ tag, CHECK);
+ }
+ cfs->guarantee_more(5, CHECK); // bsm_index, nt, tag/access_flags
+ u2 bootstrap_specifier_index = cfs->get_u2_fast();
+ u2 name_and_type_index = cfs->get_u2_fast();
+ if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index)
+ _max_bootstrap_specifier_index = (int) bootstrap_specifier_index; // collect for later
+ _cp->invoke_dynamic_at_put(index, bootstrap_specifier_index, name_and_type_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);
+ }
+
+ if (has_cp_patch_at(index)) {
+ Handle patch = clear_cp_patch_at(index);
+ guarantee_property(java_lang_String::is_instance(patch()),
+ "Illegal utf8 patch at %d in class file %s",
+ index, CHECK);
+ char* str = java_lang_String::as_utf8_string(patch());
+ // (could use java_lang_String::as_symbol instead, but might as well batch them)
+ utf8_buffer = (u1*) str;
+ utf8_length = (int) strlen(str);
+ }
+
+ unsigned int hash;
+ Symbol* 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) {
+ SymbolTable::new_symbols(_loader_data, _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) {
+ SymbolTable::new_symbols(_loader_data, _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); }
+
+inline Symbol* check_symbol_at(constantPoolHandle cp, int index) {
+ if (valid_cp_range(index, cp->length()) && cp->tag_at(index).is_utf8())
+ return cp->symbol_at(index);
+ else
+ return NULL;
+}
+
+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));
+ ConstantPool* constant_pool = ConstantPool::allocate(_loader_data, length,
+ CHECK_(nullHandle));
+ _cp = constant_pool; // save in case of errors
+ constantPoolHandle cp (THREAD, constant_pool);
+
+ // parsing constant pool entries
+ parse_constant_pool_entries(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
+ jbyte tag = cp->tag_at(index).value();
+ switch (tag) {
+ 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_klass_reference_at(klass_ref_index),
+ "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_symbol_at(name_ref_index),
+ "Invalid constant pool index %u in class file %s",
+ name_ref_index, CHECK_(nullHandle));
+ check_property(valid_symbol_at(signature_ref_index),
+ "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_symbol_at(class_index),
+ "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_StringIndex :
+ {
+ int string_index = cp->string_index_at(index);
+ check_property(valid_symbol_at(string_index),
+ "Invalid constant pool index %u in class file %s",
+ string_index, CHECK_(nullHandle));
+ Symbol* sym = cp->symbol_at(string_index);
+ cp->unresolved_string_at_put(index, sym);
+ }
+ break;
+ case JVM_CONSTANT_MethodHandle :
+ {
+ int ref_index = cp->method_handle_index_at(index);
+ check_property(
+ valid_cp_range(ref_index, length),
+ "Invalid constant pool index %u in class file %s",
+ ref_index, CHECK_(nullHandle));
+ constantTag tag = cp->tag_at(ref_index);
+ int ref_kind = cp->method_handle_ref_kind_at(index);
+ switch (ref_kind) {
+ case JVM_REF_getField:
+ case JVM_REF_getStatic:
+ case JVM_REF_putField:
+ case JVM_REF_putStatic:
+ check_property(
+ tag.is_field(),
+ "Invalid constant pool index %u in class file %s (not a field)",
+ ref_index, CHECK_(nullHandle));
+ break;
+ case JVM_REF_invokeVirtual:
+ case JVM_REF_newInvokeSpecial:
+ check_property(
+ tag.is_method(),
+ "Invalid constant pool index %u in class file %s (not a method)",
+ ref_index, CHECK_(nullHandle));
+ break;
+ case JVM_REF_invokeStatic:
+ case JVM_REF_invokeSpecial:
+ check_property(tag.is_method() ||
+ ((_major_version >= JAVA_8_VERSION) && tag.is_interface_method()),
+ "Invalid constant pool index %u in class file %s (not a method)",
+ ref_index, CHECK_(nullHandle));
+ break;
+ case JVM_REF_invokeInterface:
+ check_property(
+ tag.is_interface_method(),
+ "Invalid constant pool index %u in class file %s (not an interface method)",
+ ref_index, CHECK_(nullHandle));
+ break;
+ default:
+ classfile_parse_error(
+ "Bad method handle kind at constant pool index %u in class file %s",
+ index, CHECK_(nullHandle));
+ }
+ // Keep the ref_index unchanged. It will be indirected at link-time.
+ }
+ break;
+ case JVM_CONSTANT_MethodType :
+ {
+ int ref_index = cp->method_type_index_at(index);
+ check_property(valid_symbol_at(ref_index),
+ "Invalid constant pool index %u in class file %s",
+ ref_index, CHECK_(nullHandle));
+ }
+ break;
+ case JVM_CONSTANT_InvokeDynamic :
+ {
+ int name_and_type_ref_index = cp->invoke_dynamic_name_and_type_ref_index_at(index);
+ 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));
+ // bootstrap specifier index must be checked later, when BootstrapMethods attr is available
+ break;
+ }
+ default:
+ fatal(err_msg("bad constant pool tag value %u",
+ cp->tag_at(index).value()));
+ ShouldNotReachHere();
+ break;
+ } // end of switch
+ } // end of for
+
+ if (_cp_patches != NULL) {
+ // need to treat this_class specially...
+ int this_class_index;
+ {
+ cfs->guarantee_more(8, CHECK_(nullHandle)); // flags, this_class, super_class, infs_len
+ u1* mark = cfs->current();
+ u2 flags = cfs->get_u2_fast();
+ this_class_index = cfs->get_u2_fast();
+ cfs->set_current(mark); // revert to mark
+ }
+
+ for (index = 1; index < length; index++) { // Index 0 is unused
+ if (has_cp_patch_at(index)) {
+ guarantee_property(index != this_class_index,
+ "Illegal constant pool patch to self at %d in class file %s",
+ index, CHECK_(nullHandle));
+ patch_constant_pool(cp, index, cp_patch_at(index), CHECK_(nullHandle));
+ }
+ }
+ }
+
+ if (!_need_verify) {
+ return cp;
+ }
+
+ // second verification pass - checks the strings are of the right format.
+ // but not yet to the other entries
+ for (index = 1; index < length; index++) {
+ jbyte tag = cp->tag_at(index).value();
+ switch (tag) {
+ case JVM_CONSTANT_UnresolvedClass: {
+ Symbol* class_name = cp->klass_name_at(index);
+ // check the name, even if _cp_patches will overwrite it
+ verify_legal_class_name(class_name, CHECK_(nullHandle));
+ break;
+ }
+ case JVM_CONSTANT_NameAndType: {
+ if (_need_verify && _major_version >= JAVA_7_VERSION) {
+ int sig_index = cp->signature_ref_index_at(index);
+ int name_index = cp->name_ref_index_at(index);
+ Symbol* name = cp->symbol_at(name_index);
+ Symbol* sig = cp->symbol_at(sig_index);
+ if (sig->byte_at(0) == JVM_SIGNATURE_FUNC) {
+ verify_legal_method_signature(name, sig, CHECK_(nullHandle));
+ } else {
+ verify_legal_field_signature(name, sig, CHECK_(nullHandle));
+ }
+ }
+ break;
+ }
+ case JVM_CONSTANT_InvokeDynamic:
+ 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);
+ Symbol* name = cp->symbol_at(name_ref_index);
+ Symbol* signature = cp->symbol_at(signature_ref_index);
+ if (tag == JVM_CONSTANT_Fieldref) {
+ verify_legal_field_name(name, CHECK_(nullHandle));
+ if (_need_verify && _major_version >= JAVA_7_VERSION) {
+ // Signature is verified above, when iterating NameAndType_info.
+ // Need only to be sure it's the right type.
+ if (signature->byte_at(0) == JVM_SIGNATURE_FUNC) {
+ throwIllegalSignature(
+ "Field", name, signature, CHECK_(nullHandle));
+ }
+ } else {
+ verify_legal_field_signature(name, signature, CHECK_(nullHandle));
+ }
+ } else {
+ verify_legal_method_name(name, CHECK_(nullHandle));
+ if (_need_verify && _major_version >= JAVA_7_VERSION) {
+ // Signature is verified above, when iterating NameAndType_info.
+ // Need only to be sure it's the right type.
+ if (signature->byte_at(0) != JVM_SIGNATURE_FUNC) {
+ throwIllegalSignature(
+ "Method", name, signature, CHECK_(nullHandle));
+ }
+ } else {
+ 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 != 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;
+ }
+ case JVM_CONSTANT_MethodHandle: {
+ int ref_index = cp->method_handle_index_at(index);
+ int ref_kind = cp->method_handle_ref_kind_at(index);
+ switch (ref_kind) {
+ case JVM_REF_invokeVirtual:
+ case JVM_REF_invokeStatic:
+ case JVM_REF_invokeSpecial:
+ case JVM_REF_newInvokeSpecial:
+ {
+ int name_and_type_ref_index = cp->name_and_type_ref_index_at(ref_index);
+ int name_ref_index = cp->name_ref_index_at(name_and_type_ref_index);
+ Symbol* name = cp->symbol_at(name_ref_index);
+ if (ref_kind == JVM_REF_newInvokeSpecial) {
+ if (name != vmSymbols::object_initializer_name()) {
+ classfile_parse_error(
+ "Bad constructor name at constant pool index %u in class file %s",
+ name_ref_index, CHECK_(nullHandle));
+ }
+ } else {
+ 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;
+ // Other ref_kinds are already fully checked in previous pass.
+ }
+ break;
+ }
+ case JVM_CONSTANT_MethodType: {
+ Symbol* no_name = vmSymbols::type_name(); // place holder
+ Symbol* signature = cp->method_type_signature_at(index);
+ verify_legal_method_signature(no_name, signature, CHECK_(nullHandle));
+ break;
+ }
+ case JVM_CONSTANT_Utf8: {
+ assert(cp->symbol_at(index)->refcount() != 0, "count corrupted");
+ }
+ } // end of switch
+ } // end of for
+
+ return cp;
+}
+
+
+void ClassFileParser::patch_constant_pool(constantPoolHandle cp, int index, Handle patch, TRAPS) {
+ BasicType patch_type = T_VOID;
+
+ switch (cp->tag_at(index).value()) {
+
+ case JVM_CONSTANT_UnresolvedClass :
+ // Patching a class means pre-resolving it.
+ // The name in the constant pool is ignored.
+ if (java_lang_Class::is_instance(patch())) {
+ guarantee_property(!java_lang_Class::is_primitive(patch()),
+ "Illegal class patch at %d in class file %s",
+ index, CHECK);
+ cp->klass_at_put(index, java_lang_Class::as_Klass(patch()));
+ } else {
+ guarantee_property(java_lang_String::is_instance(patch()),
+ "Illegal class patch at %d in class file %s",
+ index, CHECK);
+ Symbol* name = java_lang_String::as_symbol(patch(), CHECK);
+ cp->unresolved_klass_at_put(index, name);
+ }
+ break;
+
+ case JVM_CONSTANT_String :
+ // skip this patch and don't clear it. Needs the oop array for resolved
+ // references to be created first.
+ return;
+
+ case JVM_CONSTANT_Integer : patch_type = T_INT; goto patch_prim;
+ case JVM_CONSTANT_Float : patch_type = T_FLOAT; goto patch_prim;
+ case JVM_CONSTANT_Long : patch_type = T_LONG; goto patch_prim;
+ case JVM_CONSTANT_Double : patch_type = T_DOUBLE; goto patch_prim;
+ patch_prim:
+ {
+ jvalue value;
+ BasicType value_type = java_lang_boxing_object::get_value(patch(), &value);
+ guarantee_property(value_type == patch_type,
+ "Illegal primitive patch at %d in class file %s",
+ index, CHECK);
+ switch (value_type) {
+ case T_INT: cp->int_at_put(index, value.i); break;
+ case T_FLOAT: cp->float_at_put(index, value.f); break;
+ case T_LONG: cp->long_at_put(index, value.j); break;
+ case T_DOUBLE: cp->double_at_put(index, value.d); break;
+ default: assert(false, "");
+ }
+ }
+ break;
+
+ default:
+ // %%% TODO: put method handles into CONSTANT_InterfaceMethodref, etc.
+ guarantee_property(!has_cp_patch_at(index),
+ "Illegal unexpected patch at %d in class file %s",
+ index, CHECK);
+ return;
+ }
+
+ // On fall-through, mark the patch as used.
+ clear_cp_patch_at(index);
+}
+
+
+
+class NameSigHash: public ResourceObj {
+ public:
+ Symbol* _name; // name
+ Symbol* _sig; // signature
+ NameSigHash* _next; // Next entry in hash table
+};
+
+
+#define HASH_ROW_SIZE 256
+
+unsigned int hash(Symbol* name, Symbol* 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 Symbol*'s to move.
+bool put_after_lookup(Symbol* name, Symbol* 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;
+}
+
+
+Array<Klass*>* ClassFileParser::parse_interfaces(int length,
+ Handle protection_domain,
+ Symbol* class_name,
+ bool* has_default_methods,
+ TRAPS) {
+ if (length == 0) {
+ _local_interfaces = Universe::the_empty_klass_array();
+ } else {
+ ClassFileStream* cfs = stream();
+ assert(length > 0, "only called for length>0");
+ _local_interfaces = MetadataFactory::new_array<Klass*>(_loader_data, length, NULL, CHECK_NULL);
+
+ int index;
+ for (index = 0; index < length; index++) {
+ u2 interface_index = cfs->get_u2(CHECK_NULL);
+ KlassHandle interf;
+ check_property(
+ valid_klass_reference_at(interface_index),
+ "Interface name has bad constant pool index %u in class file %s",
+ interface_index, CHECK_NULL);
+ if (_cp->tag_at(interface_index).is_klass()) {
+ interf = KlassHandle(THREAD, _cp->resolved_klass_at(interface_index));
+ } else {
+ Symbol* unresolved_klass = _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_NULL);
+ Handle class_loader(THREAD, _loader_data->class_loader());
+
+ // Call resolve_super so classcircularity is checked
+ Klass* k = SystemDictionary::resolve_super_or_fail(class_name,
+ unresolved_klass, class_loader, protection_domain,
+ false, CHECK_NULL);
+ interf = KlassHandle(THREAD, k);
+ }
+
+ if (!interf()->is_interface()) {
+ THROW_MSG_(vmSymbols::java_lang_IncompatibleClassChangeError(), "Implementing class", NULL);
+ }
+ if (InstanceKlass::cast(interf())->has_default_methods()) {
+ *has_default_methods = true;
+ }
+ _local_interfaces->at_put(index, interf());
+ }
+
+ if (!_need_verify || length <= 1) {
+ return _local_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++) {
+ Klass* k = _local_interfaces->at(index);
+ Symbol* 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_NULL);
+ }
+ }
+ return _local_interfaces;
+}
+
+
+void ClassFileParser::verify_constantvalue(int constantvalue_index, int signature_index, 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;")
+ && value_type.is_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(u2 attributes_count,
+ bool is_static, u2 signature_index,
+ u2* constantvalue_index_addr,
+ bool* is_synthetic_addr,
+ u2* generic_signature_index_addr,
+ ClassFileParser::FieldAnnotationCollector* parsed_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;
+ u1* runtime_visible_type_annotations = NULL;
+ int runtime_visible_type_annotations_length = 0;
+ u1* runtime_invisible_type_annotations = NULL;
+ int runtime_invisible_type_annotations_length = 0;
+ bool runtime_invisible_annotations_exists = false;
+ bool runtime_invisible_type_annotations_exists = false;
+ 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_symbol_at(attribute_name_index),
+ "Invalid field attribute index %u in class file %s",
+ attribute_name_index,
+ CHECK);
+ Symbol* 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, 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 = parse_generic_signature_attribute(CHECK);
+ } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
+ if (runtime_visible_annotations != NULL) {
+ classfile_parse_error(
+ "Multiple RuntimeVisibleAnnotations attributes for field in class file %s", CHECK);
+ }
+ runtime_visible_annotations_length = attribute_length;
+ runtime_visible_annotations = cfs->get_u1_buffer();
+ assert(runtime_visible_annotations != NULL, "null visible annotations");
+ parse_annotations(runtime_visible_annotations,
+ runtime_visible_annotations_length,
+ parsed_annotations,
+ CHECK);
+ cfs->skip_u1(runtime_visible_annotations_length, CHECK);
+ } else if (attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
+ if (runtime_invisible_annotations_exists) {
+ classfile_parse_error(
+ "Multiple RuntimeInvisibleAnnotations attributes for field in class file %s", CHECK);
+ }
+ runtime_invisible_annotations_exists = true;
+ if (PreserveAllAnnotations) {
+ runtime_invisible_annotations_length = attribute_length;
+ runtime_invisible_annotations = cfs->get_u1_buffer();
+ assert(runtime_invisible_annotations != NULL, "null invisible annotations");
+ }
+ cfs->skip_u1(attribute_length, CHECK);
+ } else if (attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
+ if (runtime_visible_type_annotations != NULL) {
+ classfile_parse_error(
+ "Multiple RuntimeVisibleTypeAnnotations attributes for field in class file %s", CHECK);
+ }
+ runtime_visible_type_annotations_length = attribute_length;
+ runtime_visible_type_annotations = cfs->get_u1_buffer();
+ assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
+ cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
+ } else if (attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
+ if (runtime_invisible_type_annotations_exists) {
+ classfile_parse_error(
+ "Multiple RuntimeInvisibleTypeAnnotations attributes for field in class file %s", CHECK);
+ } else {
+ runtime_invisible_type_annotations_exists = true;
+ }
+ if (PreserveAllAnnotations) {
+ runtime_invisible_type_annotations_length = attribute_length;
+ runtime_invisible_type_annotations = cfs->get_u1_buffer();
+ assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
+ }
+ cfs->skip_u1(attribute_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;
+ AnnotationArray* a = assemble_annotations(runtime_visible_annotations,
+ runtime_visible_annotations_length,
+ runtime_invisible_annotations,
+ runtime_invisible_annotations_length,
+ CHECK);
+ parsed_annotations->set_field_annotations(a);
+ a = assemble_annotations(runtime_visible_type_annotations,
+ runtime_visible_type_annotations_length,
+ runtime_invisible_type_annotations,
+ runtime_invisible_type_annotations_length,
+ CHECK);
+ parsed_annotations->set_field_type_annotations(a);
+ 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, // aligned long or double
+ NONSTATIC_OOP,
+ NONSTATIC_BYTE,
+ NONSTATIC_SHORT,
+ NONSTATIC_WORD,
+ NONSTATIC_DOUBLE,
+ MAX_FIELD_ALLOCATION_TYPE,
+ BAD_ALLOCATION_TYPE = -1
+};
+
+static FieldAllocationType _basic_type_to_atype[2 * (T_CONFLICT + 1)] = {
+ BAD_ALLOCATION_TYPE, // 0
+ BAD_ALLOCATION_TYPE, // 1
+ BAD_ALLOCATION_TYPE, // 2
+ BAD_ALLOCATION_TYPE, // 3
+ NONSTATIC_BYTE , // T_BOOLEAN = 4,
+ NONSTATIC_SHORT, // T_CHAR = 5,
+ NONSTATIC_WORD, // T_FLOAT = 6,
+ NONSTATIC_DOUBLE, // T_DOUBLE = 7,
+ NONSTATIC_BYTE, // T_BYTE = 8,
+ NONSTATIC_SHORT, // T_SHORT = 9,
+ NONSTATIC_WORD, // T_INT = 10,
+ NONSTATIC_DOUBLE, // T_LONG = 11,
+ NONSTATIC_OOP, // T_OBJECT = 12,
+ NONSTATIC_OOP, // T_ARRAY = 13,
+ BAD_ALLOCATION_TYPE, // T_VOID = 14,
+ BAD_ALLOCATION_TYPE, // T_ADDRESS = 15,
+ BAD_ALLOCATION_TYPE, // T_NARROWOOP = 16,
+ BAD_ALLOCATION_TYPE, // T_METADATA = 17,
+ BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18,
+ BAD_ALLOCATION_TYPE, // T_CONFLICT = 19,
+ BAD_ALLOCATION_TYPE, // 0
+ BAD_ALLOCATION_TYPE, // 1
+ BAD_ALLOCATION_TYPE, // 2
+ BAD_ALLOCATION_TYPE, // 3
+ STATIC_BYTE , // T_BOOLEAN = 4,
+ STATIC_SHORT, // T_CHAR = 5,
+ STATIC_WORD, // T_FLOAT = 6,
+ STATIC_DOUBLE, // T_DOUBLE = 7,
+ STATIC_BYTE, // T_BYTE = 8,
+ STATIC_SHORT, // T_SHORT = 9,
+ STATIC_WORD, // T_INT = 10,
+ STATIC_DOUBLE, // T_LONG = 11,
+ STATIC_OOP, // T_OBJECT = 12,
+ STATIC_OOP, // T_ARRAY = 13,
+ BAD_ALLOCATION_TYPE, // T_VOID = 14,
+ BAD_ALLOCATION_TYPE, // T_ADDRESS = 15,
+ BAD_ALLOCATION_TYPE, // T_NARROWOOP = 16,
+ BAD_ALLOCATION_TYPE, // T_METADATA = 17,
+ BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18,
+ BAD_ALLOCATION_TYPE, // T_CONFLICT = 19,
+};
+
+static FieldAllocationType basic_type_to_atype(bool is_static, BasicType type) {
+ assert(type >= T_BOOLEAN && type < T_VOID, "only allowable values");
+ FieldAllocationType result = _basic_type_to_atype[type + (is_static ? (T_CONFLICT + 1) : 0)];
+ assert(result != BAD_ALLOCATION_TYPE, "bad type");
+ return result;
+}
+
+class FieldAllocationCount: public ResourceObj {
+ public:
+ u2 count[MAX_FIELD_ALLOCATION_TYPE];
+
+ FieldAllocationCount() {
+ for (int i = 0; i < MAX_FIELD_ALLOCATION_TYPE; i++) {
+ count[i] = 0;
+ }
+ }
+
+ FieldAllocationType update(bool is_static, BasicType type) {
+ FieldAllocationType atype = basic_type_to_atype(is_static, type);
+ // Make sure there is no overflow with injected fields.
+ assert(count[atype] < 0xFFFF, "More than 65535 fields");
+ count[atype]++;
+ return atype;
+ }
+};
+
+Array<u2>* ClassFileParser::parse_fields(Symbol* class_name,
+ bool is_interface,
+ FieldAllocationCount *fac,
+ u2* java_fields_count_ptr, TRAPS) {
+ ClassFileStream* cfs = stream();
+ cfs->guarantee_more(2, CHECK_NULL); // length
+ u2 length = cfs->get_u2_fast();
+ *java_fields_count_ptr = length;
+
+ int num_injected = 0;
+ InjectedField* injected = JavaClasses::get_injected(class_name, &num_injected);
+ int total_fields = length + num_injected;
+
+ // The field array starts with tuples of shorts
+ // [access, name index, sig index, initial value index, byte offset].
+ // A generic signature slot only exists for field with generic
+ // signature attribute. And the access flag is set with
+ // JVM_ACC_FIELD_HAS_GENERIC_SIGNATURE for that field. The generic
+ // signature slots are at the end of the field array and after all
+ // other fields data.
+ //
+ // f1: [access, name index, sig index, initial value index, low_offset, high_offset]
+ // f2: [access, name index, sig index, initial value index, low_offset, high_offset]
+ // ...
+ // fn: [access, name index, sig index, initial value index, low_offset, high_offset]
+ // [generic signature index]
+ // [generic signature index]
+ // ...
+ //
+ // Allocate a temporary resource array for field data. For each field,
+ // a slot is reserved in the temporary array for the generic signature
+ // index. After parsing all fields, the data are copied to a permanent
+ // array and any unused slots will be discarded.
+ ResourceMark rm(THREAD);
+ u2* fa = NEW_RESOURCE_ARRAY_IN_THREAD(
+ THREAD, u2, total_fields * (FieldInfo::field_slots + 1));
+
+ // The generic signature slots start after all other fields' data.
+ int generic_signature_slot = total_fields * FieldInfo::field_slots;
+ int num_generic_signature = 0;
+ for (int n = 0; n < length; n++) {
+ cfs->guarantee_more(8, CHECK_NULL); // 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_NULL);
+ access_flags.set_flags(flags);
+
+ u2 name_index = cfs->get_u2_fast();
+ int cp_size = _cp->length();
+ check_property(valid_symbol_at(name_index),
+ "Invalid constant pool index %u for field name in class file %s",
+ name_index,
+ CHECK_NULL);
+ Symbol* name = _cp->symbol_at(name_index);
+ verify_legal_field_name(name, CHECK_NULL);
+
+ u2 signature_index = cfs->get_u2_fast();
+ check_property(valid_symbol_at(signature_index),
+ "Invalid constant pool index %u for field signature in class file %s",
+ signature_index, CHECK_NULL);
+ Symbol* sig = _cp->symbol_at(signature_index);
+ verify_legal_field_signature(name, sig, CHECK_NULL);
+
+ u2 constantvalue_index = 0;
+ bool is_synthetic = false;
+ u2 generic_signature_index = 0;
+ bool is_static = access_flags.is_static();
+ FieldAnnotationCollector parsed_annotations(_loader_data);
+
+ u2 attributes_count = cfs->get_u2_fast();
+ if (attributes_count > 0) {
+ parse_field_attributes(attributes_count, is_static, signature_index,
+ &constantvalue_index, &is_synthetic,
+ &generic_signature_index, &parsed_annotations,
+ CHECK_NULL);
+ if (parsed_annotations.field_annotations() != NULL) {
+ if (_fields_annotations == NULL) {
+ _fields_annotations = MetadataFactory::new_array<AnnotationArray*>(
+ _loader_data, length, NULL,
+ CHECK_NULL);
+ }
+ _fields_annotations->at_put(n, parsed_annotations.field_annotations());
+ parsed_annotations.set_field_annotations(NULL);
+ }
+ if (parsed_annotations.field_type_annotations() != NULL) {
+ if (_fields_type_annotations == NULL) {
+ _fields_type_annotations = MetadataFactory::new_array<AnnotationArray*>(
+ _loader_data, length, NULL,
+ CHECK_NULL);
+ }
+ _fields_type_annotations->at_put(n, parsed_annotations.field_type_annotations());
+ parsed_annotations.set_field_type_annotations(NULL);
+ }
+
+ if (is_synthetic) {
+ access_flags.set_is_synthetic();
+ }
+ if (generic_signature_index != 0) {
+ access_flags.set_field_has_generic_signature();
+ fa[generic_signature_slot] = generic_signature_index;
+ generic_signature_slot ++;
+ num_generic_signature ++;
+ }
+ }
+
+ FieldInfo* field = FieldInfo::from_field_array(fa, n);
+ field->initialize(access_flags.as_short(),
+ name_index,
+ signature_index,
+ constantvalue_index);
+ BasicType type = _cp->basic_type_for_signature_at(signature_index);
+
+ // Remember how many oops we encountered and compute allocation type
+ FieldAllocationType atype = fac->update(is_static, type);
+ field->set_allocation_type(atype);
+
+ // After field is initialized with type, we can augment it with aux info
+ if (parsed_annotations.has_any_annotations())
+ parsed_annotations.apply_to(field);
+ }
+
+ int index = length;
+ if (num_injected != 0) {
+ for (int n = 0; n < num_injected; n++) {
+ // Check for duplicates
+ if (injected[n].may_be_java) {
+ Symbol* name = injected[n].name();
+ Symbol* signature = injected[n].signature();
+ bool duplicate = false;
+ for (int i = 0; i < length; i++) {
+ FieldInfo* f = FieldInfo::from_field_array(fa, i);
+ if (name == _cp->symbol_at(f->name_index()) &&
+ signature == _cp->symbol_at(f->signature_index())) {
+ // Symbol is desclared in Java so skip this one
+ duplicate = true;
+ break;
+ }
+ }
+ if (duplicate) {
+ // These will be removed from the field array at the end
+ continue;
+ }
+ }
+
+ // Injected field
+ FieldInfo* field = FieldInfo::from_field_array(fa, index);
+ field->initialize(JVM_ACC_FIELD_INTERNAL,
+ injected[n].name_index,
+ injected[n].signature_index,
+ 0);
+
+ BasicType type = FieldType::basic_type(injected[n].signature());
+
+ // Remember how many oops we encountered and compute allocation type
+ FieldAllocationType atype = fac->update(false, type);
+ field->set_allocation_type(atype);
+ index++;
+ }
+ }
+
+ // Now copy the fields' data from the temporary resource array.
+ // Sometimes injected fields already exist in the Java source so
+ // the fields array could be too long. In that case the
+ // fields array is trimed. Also unused slots that were reserved
+ // for generic signature indexes are discarded.
+ Array<u2>* fields = MetadataFactory::new_array<u2>(
+ _loader_data, index * FieldInfo::field_slots + num_generic_signature,
+ CHECK_NULL);
+ _fields = fields; // save in case of error
+ {
+ int i = 0;
+ for (; i < index * FieldInfo::field_slots; i++) {
+ fields->at_put(i, fa[i]);
+ }
+ for (int j = total_fields * FieldInfo::field_slots;
+ j < generic_signature_slot; j++) {
+ fields->at_put(i++, fa[j]);
+ }
+ assert(i == fields->length(), "");
+ }
+
+ 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 (AllFieldStream fs(fields, _cp); !fs.done(); fs.next()) {
+ Symbol* name = fs.name();
+ Symbol* sig = fs.signature();
+ // 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_NULL);
+ }
+ }
+
+ return fields;
+}
+
+
+static void copy_u2_with_conversion(u2* dest, u2* src, int length) {
+ while (length-- > 0) {
+ *dest++ = Bytes::get_Java_u2((u1*) (src++));
+ }
+}
+
+
+u2* ClassFileParser::parse_exception_table(u4 code_length,
+ u4 exception_table_length,
+ TRAPS) {
+ ClassFileStream* cfs = stream();
+
+ u2* exception_table_start = cfs->get_u2_buffer();
+ assert(exception_table_start != NULL, "null exception table");
+ cfs->guarantee_more(8 * exception_table_length, CHECK_NULL); // start_pc, end_pc, handler_pc, catch_type_index
+ // Will check legal target after parsing code array in verifier.
+ if (_need_verify) {
+ 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();
+ guarantee_property((start_pc < end_pc) && (end_pc <= code_length),
+ "Illegal exception table range in class file %s",
+ CHECK_NULL);
+ guarantee_property(handler_pc < code_length,
+ "Illegal exception table handler in class file %s",
+ CHECK_NULL);
+ if (catch_type_index != 0) {
+ guarantee_property(valid_klass_reference_at(catch_type_index),
+ "Catch type in exception table has bad constant type in class file %s", CHECK_NULL);
+ }
+ }
+ } else {
+ cfs->skip_u2_fast(exception_table_length * 4);
+ }
+ return exception_table_start;
+}
+
+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<mtClass> {
+ 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,
+ 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_symbol_at(name_index),
+ "Name index %u in %s has bad constant type in class file %s",
+ name_index, tbl_name, CHECK_NULL);
+ guarantee_property(valid_symbol_at(descriptor_index),
+ "Signature index %u in %s has bad constant type in class file %s",
+ descriptor_index, tbl_name, CHECK_NULL);
+
+ Symbol* name = _cp->symbol_at(name_index);
+ Symbol* sig = _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, 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_klass_reference_at(class_index),
+ "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;
+}
+
+u1* 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;
+ }
+ return stackmap_table_start;
+}
+
+u2* ClassFileParser::parse_checked_exceptions(u2* checked_exceptions_length,
+ u4 method_attribute_length,
+ 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_klass_reference_at(checked_exception),
+ "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;
+}
+
+void ClassFileParser::throwIllegalSignature(
+ const char* type, Symbol* name, Symbol* sig, TRAPS) {
+ ResourceMark rm(THREAD);
+ Exceptions::fthrow(THREAD_AND_LOCATION,
+ vmSymbols::java_lang_ClassFormatError(),
+ "%s \"%s\" in class %s has illegal signature \"%s\"", type,
+ name->as_C_string(), _class_name->as_C_string(), sig->as_C_string());
+}
+
+// Skip an annotation. Return >=limit if there is any problem.
+int ClassFileParser::skip_annotation(u1* buffer, int limit, int index) {
+ // annotation := atype:u2 do(nmem:u2) {member:u2 value}
+ // value := switch (tag:u1) { ... }
+ index += 2; // skip atype
+ if ((index += 2) >= limit) return limit; // read nmem
+ int nmem = Bytes::get_Java_u2(buffer+index-2);
+ while (--nmem >= 0 && index < limit) {
+ index += 2; // skip member
+ index = skip_annotation_value(buffer, limit, index);
+ }
+ return index;
+}
+
+// Skip an annotation value. Return >=limit if there is any problem.
+int ClassFileParser::skip_annotation_value(u1* buffer, int limit, int index) {
+ // value := switch (tag:u1) {
+ // case B, C, I, S, Z, D, F, J, c: con:u2;
+ // case e: e_class:u2 e_name:u2;
+ // case s: s_con:u2;
+ // case [: do(nval:u2) {value};
+ // case @: annotation;
+ // case s: s_con:u2;
+ // }
+ if ((index += 1) >= limit) return limit; // read tag
+ u1 tag = buffer[index-1];
+ switch (tag) {
+ case 'B': case 'C': case 'I': case 'S': case 'Z':
+ case 'D': case 'F': case 'J': case 'c': case 's':
+ index += 2; // skip con or s_con
+ break;
+ case 'e':
+ index += 4; // skip e_class, e_name
+ break;
+ case '[':
+ {
+ if ((index += 2) >= limit) return limit; // read nval
+ int nval = Bytes::get_Java_u2(buffer+index-2);
+ while (--nval >= 0 && index < limit) {
+ index = skip_annotation_value(buffer, limit, index);
+ }
+ }
+ break;
+ case '@':
+ index = skip_annotation(buffer, limit, index);
+ break;
+ default:
+ assert(false, "annotation tag");
+ return limit; // bad tag byte
+ }
+ return index;
+}
+
+// Sift through annotations, looking for those significant to the VM:
+void ClassFileParser::parse_annotations(u1* buffer, int limit,
+ ClassFileParser::AnnotationCollector* coll,
+ TRAPS) {
+ // annotations := do(nann:u2) {annotation}
+ int index = 0;
+ if ((index += 2) >= limit) return; // read nann
+ int nann = Bytes::get_Java_u2(buffer+index-2);
+ enum { // initial annotation layout
+ atype_off = 0, // utf8 such as 'Ljava/lang/annotation/Retention;'
+ count_off = 2, // u2 such as 1 (one value)
+ member_off = 4, // utf8 such as 'value'
+ tag_off = 6, // u1 such as 'c' (type) or 'e' (enum)
+ e_tag_val = 'e',
+ e_type_off = 7, // utf8 such as 'Ljava/lang/annotation/RetentionPolicy;'
+ e_con_off = 9, // utf8 payload, such as 'SOURCE', 'CLASS', 'RUNTIME'
+ e_size = 11, // end of 'e' annotation
+ c_tag_val = 'c', // payload is type
+ c_con_off = 7, // utf8 payload, such as 'I'
+ c_size = 9, // end of 'c' annotation
+ s_tag_val = 's', // payload is String
+ s_con_off = 7, // utf8 payload, such as 'Ljava/lang/String;'
+ s_size = 9,
+ min_size = 6 // smallest possible size (zero members)
+ };
+ while ((--nann) >= 0 && (index-2 + min_size <= limit)) {
+ int index0 = index;
+ index = skip_annotation(buffer, limit, index);
+ u1* abase = buffer + index0;
+ int atype = Bytes::get_Java_u2(abase + atype_off);
+ int count = Bytes::get_Java_u2(abase + count_off);
+ Symbol* aname = check_symbol_at(_cp, atype);
+ if (aname == NULL) break; // invalid annotation name
+ Symbol* member = NULL;
+ if (count >= 1) {
+ int member_index = Bytes::get_Java_u2(abase + member_off);
+ member = check_symbol_at(_cp, member_index);
+ if (member == NULL) break; // invalid member name
+ }
+
+ // Here is where parsing particular annotations will take place.
+ AnnotationCollector::ID id = coll->annotation_index(_loader_data, aname);
+ if (id == AnnotationCollector::_unknown) continue;
+ coll->set_annotation(id);
+
+ if (id == AnnotationCollector::_sun_misc_Contended) {
+ // @Contended can optionally specify the contention group.
+ //
+ // Contended group defines the equivalence class over the fields:
+ // the fields within the same contended group are not treated distinct.
+ // The only exception is default group, which does not incur the
+ // equivalence. Naturally, contention group for classes is meaningless.
+ //
+ // While the contention group is specified as String, annotation
+ // values are already interned, and we might as well use the constant
+ // pool index as the group tag.
+ //
+ u2 group_index = 0; // default contended group
+ if (count == 1
+ && s_size == (index - index0) // match size
+ && s_tag_val == *(abase + tag_off)
+ && member == vmSymbols::value_name()) {
+ group_index = Bytes::get_Java_u2(abase + s_con_off);
+ if (_cp->symbol_at(group_index)->utf8_length() == 0) {
+ group_index = 0; // default contended group
+ }
+ }
+ coll->set_contended_group(group_index);
+ }
+ }
+}
+
+ClassFileParser::AnnotationCollector::ID
+ClassFileParser::AnnotationCollector::annotation_index(ClassLoaderData* loader_data,
+ Symbol* name) {
+ vmSymbols::SID sid = vmSymbols::find_sid(name);
+ // Privileged code can use all annotations. Other code silently drops some.
+ const bool privileged = loader_data->is_the_null_class_loader_data() ||
+ loader_data->is_ext_class_loader_data() ||
+ loader_data->is_anonymous();
+ switch (sid) {
+ case vmSymbols::VM_SYMBOL_ENUM_NAME(sun_reflect_CallerSensitive_signature):
+ if (_location != _in_method) break; // only allow for methods
+ if (!privileged) break; // only allow in privileged code
+ return _method_CallerSensitive;
+ case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_ForceInline_signature):
+ if (_location != _in_method) break; // only allow for methods
+ if (!privileged) break; // only allow in privileged code
+ return _method_ForceInline;
+ case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_DontInline_signature):
+ if (_location != _in_method) break; // only allow for methods
+ if (!privileged) break; // only allow in privileged code
+ return _method_DontInline;
+ case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Compiled_signature):
+ if (_location != _in_method) break; // only allow for methods
+ if (!privileged) break; // only allow in privileged code
+ return _method_LambdaForm_Compiled;
+ case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Hidden_signature):
+ if (_location != _in_method) break; // only allow for methods
+ if (!privileged) break; // only allow in privileged code
+ return _method_LambdaForm_Hidden;
+ case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_Stable_signature):
+ if (_location != _in_field) break; // only allow for fields
+ if (!privileged) break; // only allow in privileged code
+ return _field_Stable;
+ case vmSymbols::VM_SYMBOL_ENUM_NAME(sun_misc_Contended_signature):
+ if (_location != _in_field && _location != _in_class) break; // only allow for fields and classes
+ if (!EnableContended || (RestrictContended && !privileged)) break; // honor privileges
+ return _sun_misc_Contended;
+ default: break;
+ }
+ return AnnotationCollector::_unknown;
+}
+
+void ClassFileParser::FieldAnnotationCollector::apply_to(FieldInfo* f) {
+ if (is_contended())
+ f->set_contended_group(contended_group());
+ if (is_stable())
+ f->set_stable(true);
+}
+
+ClassFileParser::FieldAnnotationCollector::~FieldAnnotationCollector() {
+ // If there's an error deallocate metadata for field annotations
+ MetadataFactory::free_array<u1>(_loader_data, _field_annotations);
+ MetadataFactory::free_array<u1>(_loader_data, _field_type_annotations);
+}
+
+void ClassFileParser::MethodAnnotationCollector::apply_to(methodHandle m) {
+ if (has_annotation(_method_CallerSensitive))
+ m->set_caller_sensitive(true);
+ if (has_annotation(_method_ForceInline))
+ m->set_force_inline(true);
+ if (has_annotation(_method_DontInline))
+ m->set_dont_inline(true);
+ if (has_annotation(_method_LambdaForm_Compiled) && m->intrinsic_id() == vmIntrinsics::_none)
+ m->set_intrinsic_id(vmIntrinsics::_compiledLambdaForm);
+ if (has_annotation(_method_LambdaForm_Hidden))
+ m->set_hidden(true);
+}
+
+void ClassFileParser::ClassAnnotationCollector::apply_to(instanceKlassHandle k) {
+ k->set_is_contended(is_contended());
+}
+
+
+#define MAX_ARGS_SIZE 255
+#define MAX_CODE_SIZE 65535
+#define INITIAL_MAX_LVT_NUMBER 256
+
+/* 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.
+ */
+void ClassFileParser::copy_localvariable_table(ConstMethod* cm,
+ int lvt_cnt,
+ u2* localvariable_table_length,
+ u2** localvariable_table_start,
+ int lvtt_cnt,
+ u2* localvariable_type_table_length,
+ u2** localvariable_type_table_start,
+ TRAPS) {
+
+ 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 = cm->localvariable_table_start();
+
+ for (int tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) {
+ cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no];
+ for (int 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);
+ }
+ }
+ }
+
+ // To merge LocalVariableTable and LocalVariableTypeTable
+ Classfile_LVT_Element* cf_lvtt;
+ LocalVariableTableElement lvtt_elem;
+
+ for (int tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) {
+ cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no];
+ for (int 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);
+ }
+ } 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);
+ } else {
+ // to add generic signatures into LocalVariableTable
+ entry->_elem->signature_cp_index = lvtt_elem.descriptor_cp_index;
+ }
+ }
+ }
+ clear_hashtable(lvt_Hash);
+}
+
+
+void ClassFileParser::copy_method_annotations(ConstMethod* cm,
+ u1* runtime_visible_annotations,
+ int runtime_visible_annotations_length,
+ u1* runtime_invisible_annotations,
+ int runtime_invisible_annotations_length,
+ u1* runtime_visible_parameter_annotations,
+ int runtime_visible_parameter_annotations_length,
+ u1* runtime_invisible_parameter_annotations,
+ int runtime_invisible_parameter_annotations_length,
+ u1* runtime_visible_type_annotations,
+ int runtime_visible_type_annotations_length,
+ u1* runtime_invisible_type_annotations,
+ int runtime_invisible_type_annotations_length,
+ u1* annotation_default,
+ int annotation_default_length,
+ TRAPS) {
+
+ AnnotationArray* a;
+
+ if (runtime_visible_annotations_length +
+ runtime_invisible_annotations_length > 0) {
+ a = assemble_annotations(runtime_visible_annotations,
+ runtime_visible_annotations_length,
+ runtime_invisible_annotations,
+ runtime_invisible_annotations_length,
+ CHECK);
+ cm->set_method_annotations(a);
+ }
+
+ if (runtime_visible_parameter_annotations_length +
+ runtime_invisible_parameter_annotations_length > 0) {
+ a = assemble_annotations(runtime_visible_parameter_annotations,
+ runtime_visible_parameter_annotations_length,
+ runtime_invisible_parameter_annotations,
+ runtime_invisible_parameter_annotations_length,
+ CHECK);
+ cm->set_parameter_annotations(a);
+ }
+
+ if (annotation_default_length > 0) {
+ a = assemble_annotations(annotation_default,
+ annotation_default_length,
+ NULL,
+ 0,
+ CHECK);
+ cm->set_default_annotations(a);
+ }
+
+ if (runtime_visible_type_annotations_length +
+ runtime_invisible_type_annotations_length > 0) {
+ a = assemble_annotations(runtime_visible_type_annotations,
+ runtime_visible_type_annotations_length,
+ runtime_invisible_type_annotations,
+ runtime_invisible_type_annotations_length,
+ CHECK);
+ cm->set_type_annotations(a);
+ }
+}
+
+
+// Note: the parse_method below is big and clunky because all parsing of the code and exceptions
+// attribute is inlined. This is cumbersome to avoid since we inline most of the parts in the
+// Method* to save footprint, so we only know the size of the resulting Method* 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(bool is_interface,
+ AccessFlags *promoted_flags,
+ 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_symbol_at(name_index),
+ "Illegal constant pool index %u for method name in class file %s",
+ name_index, CHECK_(nullHandle));
+ Symbol* name = _cp->symbol_at(name_index);
+ verify_legal_method_name(name, CHECK_(nullHandle));
+
+ u2 signature_index = cfs->get_u2_fast();
+ guarantee_property(
+ valid_symbol_at(signature_index),
+ "Illegal constant pool index %u for method signature in class file %s",
+ signature_index, CHECK_(nullHandle));
+ Symbol* signature = _cp->symbol_at(signature_index);
+
+ AccessFlags access_flags;
+ if (name == vmSymbols::class_initializer_name()) {
+ // We ignore the other access flags for a valid class initializer.
+ // (JVM Spec 2nd ed., chapter 4.6)
+ if (_major_version < 51) { // backward compatibility
+ flags = JVM_ACC_STATIC;
+ } else if ((flags & JVM_ACC_STATIC) == JVM_ACC_STATIC) {
+ flags &= JVM_ACC_STATIC | JVM_ACC_STRICT;
+ }
+ } 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;
+ u2* exception_table_start = NULL;
+ Array<int>* exception_handlers = 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;
+ u2 method_parameters_length = 0;
+ u1* method_parameters_data = NULL;
+ bool method_parameters_seen = false;
+ bool parsed_code_attribute = false;
+ bool parsed_checked_exceptions_attribute = false;
+ bool parsed_stackmap_attribute = false;
+ // stackmap attribute - JDK1.5
+ u1* stackmap_data = NULL;
+ int stackmap_data_length = 0;
+ u2 generic_signature_index = 0;
+ MethodAnnotationCollector parsed_annotations;
+ 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* runtime_visible_type_annotations = NULL;
+ int runtime_visible_type_annotations_length = 0;
+ u1* runtime_invisible_type_annotations = NULL;
+ int runtime_invisible_type_annotations_length = 0;
+ bool runtime_invisible_annotations_exists = false;
+ bool runtime_invisible_type_annotations_exists = false;
+ bool runtime_invisible_parameter_annotations_exists = false;
+ 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_symbol_at(method_attribute_name_index),
+ "Invalid method attribute name index %u in class file %s",
+ method_attribute_name_index, CHECK_(nullHandle));
+
+ Symbol* 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_table_start =
+ parse_exception_table(code_length, exception_table_length, 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 = 0;
+
+ if (_major_version > 45 || (_major_version == 45 && _minor_version > 2)) {
+ calculated_attribute_length =
+ sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length);
+ } else {
+ // max_stack, locals and length are smaller in pre-version 45.2 classes
+ calculated_attribute_length = sizeof(u1) + sizeof(u1) + sizeof(u2);
+ }
+ calculated_attribute_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_symbol_at(code_attribute_name_index),
+ "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;
+ localvariable_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt);
+ localvariable_table_start = 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,
+ &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;
+ localvariable_type_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt);
+ localvariable_type_table_start = 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,
+ &localvariable_type_table_length[lvtt_cnt],
+ true, // is LVTT
+ CHECK_(nullHandle));
+ lvtt_cnt++;
+ } else if (_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));
+ }
+ stackmap_data = parse_stackmap_table(code_attribute_length, CHECK_(nullHandle));
+ stackmap_data_length = code_attribute_length;
+ 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,
+ CHECK_(nullHandle));
+ } else if (method_attribute_name == vmSymbols::tag_method_parameters()) {
+ // reject multiple method parameters
+ if (method_parameters_seen) {
+ classfile_parse_error("Multiple MethodParameters attributes in class file %s", CHECK_(nullHandle));
+ }
+ method_parameters_seen = true;
+ method_parameters_length = cfs->get_u1_fast();
+ if (method_attribute_length != (method_parameters_length * 4u) + 1u) {
+ classfile_parse_error(
+ "Invalid MethodParameters method attribute length %u in class file",
+ method_attribute_length, CHECK_(nullHandle));
+ }
+ method_parameters_data = cfs->get_u1_buffer();
+ cfs->skip_u2_fast(method_parameters_length);
+ cfs->skip_u2_fast(method_parameters_length);
+ // ignore this attribute if it cannot be reflected
+ if (!SystemDictionary::Parameter_klass_loaded())
+ method_parameters_length = 0;
+ } 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));
+ }
+ generic_signature_index = parse_generic_signature_attribute(CHECK_(nullHandle));
+ } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
+ if (runtime_visible_annotations != NULL) {
+ classfile_parse_error(
+ "Multiple RuntimeVisibleAnnotations attributes for method in class file %s", CHECK_(nullHandle));
+ }
+ runtime_visible_annotations_length = method_attribute_length;
+ runtime_visible_annotations = cfs->get_u1_buffer();
+ assert(runtime_visible_annotations != NULL, "null visible annotations");
+ parse_annotations(runtime_visible_annotations,
+ runtime_visible_annotations_length, &parsed_annotations,
+ CHECK_(nullHandle));
+ cfs->skip_u1(runtime_visible_annotations_length, CHECK_(nullHandle));
+ } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
+ if (runtime_invisible_annotations_exists) {
+ classfile_parse_error(
+ "Multiple RuntimeInvisibleAnnotations attributes for method in class file %s", CHECK_(nullHandle));
+ }
+ runtime_invisible_annotations_exists = true;
+ if (PreserveAllAnnotations) {
+ 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(method_attribute_length, CHECK_(nullHandle));
+ } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) {
+ if (runtime_visible_parameter_annotations != NULL) {
+ classfile_parse_error(
+ "Multiple RuntimeVisibleParameterAnnotations attributes for method in class file %s", CHECK_(nullHandle));
+ }
+ 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 (method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) {
+ if (runtime_invisible_parameter_annotations_exists) {
+ classfile_parse_error(
+ "Multiple RuntimeInvisibleParameterAnnotations attributes for method in class file %s", CHECK_(nullHandle));
+ }
+ runtime_invisible_parameter_annotations_exists = true;
+ if (PreserveAllAnnotations) {
+ 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(method_attribute_length, CHECK_(nullHandle));
+ } else if (method_attribute_name == vmSymbols::tag_annotation_default()) {
+ if (annotation_default != NULL) {
+ classfile_parse_error(
+ "Multiple AnnotationDefault attributes for method in class file %s",
+ CHECK_(nullHandle));
+ }
+ 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 if (method_attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) {
+ if (runtime_visible_type_annotations != NULL) {
+ classfile_parse_error(
+ "Multiple RuntimeVisibleTypeAnnotations attributes for method in class file %s",
+ CHECK_(nullHandle));
+ }
+ runtime_visible_type_annotations_length = method_attribute_length;
+ runtime_visible_type_annotations = cfs->get_u1_buffer();
+ assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
+ // No need for the VM to parse Type annotations
+ cfs->skip_u1(runtime_visible_type_annotations_length, CHECK_(nullHandle));
+ } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) {
+ if (runtime_invisible_type_annotations_exists) {
+ classfile_parse_error(
+ "Multiple RuntimeInvisibleTypeAnnotations attributes for method in class file %s",
+ CHECK_(nullHandle));
+ } else {
+ runtime_invisible_type_annotations_exists = true;
+ }
+ if (PreserveAllAnnotations) {
+ runtime_invisible_type_annotations_length = method_attribute_length;
+ runtime_invisible_type_annotations = cfs->get_u1_buffer();
+ assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
+ }
+ cfs->skip_u1(method_attribute_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 Method* is finally available, now create it
+ InlineTableSizes sizes(
+ total_lvt_length,
+ linenumber_table_length,
+ exception_table_length,
+ checked_exceptions_length,
+ method_parameters_length,
+ generic_signature_index,
+ runtime_visible_annotations_length +
+ runtime_invisible_annotations_length,
+ runtime_visible_parameter_annotations_length +
+ runtime_invisible_parameter_annotations_length,
+ runtime_visible_type_annotations_length +
+ runtime_invisible_type_annotations_length,
+ annotation_default_length,
+ 0);
+
+ Method* m = Method::allocate(
+ _loader_data, code_length, access_flags, &sizes,
+ ConstMethod::NORMAL, CHECK_(nullHandle));
+
+ ClassLoadingService::add_class_method_size(m->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);
+#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);
+ if (stackmap_data != NULL) {
+ m->constMethod()->copy_stackmap_data(_loader_data, stackmap_data,
+ stackmap_data_length, CHECK_NULL);
+ }
+
+ // Copy byte codes
+ m->set_code(code_start);
+
+ // Copy line number table
+ if (linenumber_table != NULL) {
+ memcpy(m->compressed_linenumber_table(),
+ linenumber_table->buffer(), linenumber_table_length);
+ }
+
+ // Copy exception table
+ if (exception_table_length > 0) {
+ int size =
+ exception_table_length * sizeof(ExceptionTableElement) / sizeof(u2);
+ copy_u2_with_conversion((u2*) m->exception_table_start(),
+ exception_table_start, size);
+ }
+
+ // Copy method parameters
+ if (method_parameters_length > 0) {
+ MethodParametersElement* elem = m->constMethod()->method_parameters_start();
+ for (int i = 0; i < method_parameters_length; i++) {
+ elem[i].name_cp_index = Bytes::get_Java_u2(method_parameters_data);
+ method_parameters_data += 2;
+ elem[i].flags = Bytes::get_Java_u2(method_parameters_data);
+ method_parameters_data += 2;
+ }
+ }
+
+ // 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.
+ if (total_lvt_length > 0) {
+ promoted_flags->set_has_localvariable_table();
+ copy_localvariable_table(m->constMethod(), lvt_cnt,
+ localvariable_table_length,
+ localvariable_table_start,
+ lvtt_cnt,
+ localvariable_type_table_length,
+ localvariable_type_table_start, CHECK_NULL);
+ }
+
+ if (parsed_annotations.has_any_annotations())
+ parsed_annotations.apply_to(m);
+
+ // Copy annotations
+ copy_method_annotations(m->constMethod(),
+ runtime_visible_annotations,
+ runtime_visible_annotations_length,
+ runtime_invisible_annotations,
+ runtime_invisible_annotations_length,
+ runtime_visible_parameter_annotations,
+ runtime_visible_parameter_annotations_length,
+ runtime_invisible_parameter_annotations,
+ runtime_invisible_parameter_annotations_length,
+ runtime_visible_type_annotations,
+ runtime_visible_type_annotations_length,
+ runtime_invisible_type_annotations,
+ runtime_invisible_type_annotations_length,
+ annotation_default,
+ annotation_default_length,
+ CHECK_NULL);
+
+ 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;
+ }
+
+ NOT_PRODUCT(m->verify());
+ 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.
+
+Array<Method*>* ClassFileParser::parse_methods(bool is_interface,
+ AccessFlags* promoted_flags,
+ bool* has_final_method,
+ bool* has_default_methods,
+ TRAPS) {
+ ClassFileStream* cfs = stream();
+ cfs->guarantee_more(2, CHECK_NULL); // length
+ u2 length = cfs->get_u2_fast();
+ if (length == 0) {
+ _methods = Universe::the_empty_method_array();
+ } else {
+ _methods = MetadataFactory::new_array<Method*>(_loader_data, length, NULL, CHECK_NULL);
+
+ HandleMark hm(THREAD);
+ for (int index = 0; index < length; index++) {
+ methodHandle method = parse_method(is_interface,
+ promoted_flags,
+ CHECK_NULL);
+
+ if (method->is_final()) {
+ *has_final_method = true;
+ }
+ if (is_interface && !(*has_default_methods)
+ && !method->is_abstract() && !method->is_static()
+ && !method->is_private()) {
+ // default method
+ *has_default_methods = true;
+ }
+ _methods->at_put(index, method());
+ }
+
+ 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++) {
+ Method* m = _methods->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_NULL);
+ }
+ }
+ }
+ return _methods;
+}
+
+
+intArray* ClassFileParser::sort_methods(Array<Method*>* methods) {
+ int length = methods->length();
+ // If JVMTI original method ordering or sharing is enabled we have to
+ // remember the original class file ordering.
+ // We temporarily use the vtable_index field in the Method* to store the
+ // class file index, so we can read in after calling qsort.
+ // Put the method ordering in the shared archive.
+ if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
+ for (int index = 0; index < length; index++) {
+ Method* m = methods->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 Symbol::fast_compare
+ Method::sort_methods(methods);
+
+ intArray* method_ordering = NULL;
+ // If JVMTI original method ordering or sharing is enabled construct int
+ // array remembering the original ordering
+ if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) {
+ method_ordering = new intArray(length);
+ for (int index = 0; index < length; index++) {
+ Method* m = methods->at(index);
+ int old_index = m->vtable_index();
+ assert(old_index >= 0 && old_index < length, "invalid method index");
+ method_ordering->at_put(index, old_index);
+ m->set_vtable_index(Method::invalid_vtable_index);
+ }
+ }
+ return method_ordering;
+}
+
+// Parse generic_signature attribute for methods and fields
+u2 ClassFileParser::parse_generic_signature_attribute(TRAPS) {
+ ClassFileStream* cfs = stream();
+ cfs->guarantee_more(2, CHECK_0); // generic_signature_index
+ u2 generic_signature_index = cfs->get_u2_fast();
+ check_property(
+ valid_symbol_at(generic_signature_index),
+ "Invalid Signature attribute at constant pool index %u in class file %s",
+ generic_signature_index, CHECK_0);
+ return generic_signature_index;
+}
+
+void ClassFileParser::parse_classfile_sourcefile_attribute(TRAPS) {
+ ClassFileStream* cfs = stream();
+ cfs->guarantee_more(2, CHECK); // sourcefile_index
+ u2 sourcefile_index = cfs->get_u2_fast();
+ check_property(
+ valid_symbol_at(sourcefile_index),
+ "Invalid SourceFile attribute at constant pool index %u in class file %s",
+ sourcefile_index, CHECK);
+ set_class_sourcefile_index(sourcefile_index);
+}
+
+
+
+void ClassFileParser::parse_classfile_source_debug_extension_attribute(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()) {
+ assert((length+1) > length, "Overflow checking");
+ u1* sde = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, u1, length+1);
+ for (int i = 0; i < length; i++) {
+ sde[i] = sde_buffer[i];
+ }
+ sde[length] = '\0';
+ set_class_sde_buffer((char*)sde, length);
+ }
+ // 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(u1* inner_classes_attribute_start,
+ bool parsed_enclosingmethod_attribute,
+ u2 enclosing_method_class_index,
+ u2 enclosing_method_method_index,
+ TRAPS) {
+ ClassFileStream* cfs = stream();
+ u1* current_mark = cfs->current();
+ u2 length = 0;
+ if (inner_classes_attribute_start != NULL) {
+ cfs->set_current(inner_classes_attribute_start);
+ cfs->guarantee_more(2, CHECK_0); // length
+ length = cfs->get_u2_fast();
+ }
+
+ // 4-tuples of shorts of inner classes data and 2 shorts of enclosing
+ // method data:
+ // [inner_class_info_index,
+ // outer_class_info_index,
+ // inner_name_index,
+ // inner_class_access_flags,
+ // ...
+ // enclosing_method_class_index,
+ // enclosing_method_method_index]
+ int size = length * 4 + (parsed_enclosingmethod_attribute ? 2 : 0);
+ Array<u2>* inner_classes = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
+ _inner_classes = inner_classes;
+
+ 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_klass_reference_at(inner_class_info_index),
+ "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_klass_reference_at(outer_class_info_index),
+ "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_symbol_at(inner_name_index),
+ "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->at_put(index++, inner_class_info_index);
+ inner_classes->at_put(index++, outer_class_info_index);
+ inner_classes->at_put(index++, inner_name_index);
+ inner_classes->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 < length * 4; i += 4) {
+ for(int j = i + 4; j < length * 4; j += 4) {
+ guarantee_property((inner_classes->at(i) != inner_classes->at(j) ||
+ inner_classes->at(i+1) != inner_classes->at(j+1) ||
+ inner_classes->at(i+2) != inner_classes->at(j+2) ||
+ inner_classes->at(i+3) != inner_classes->at(j+3)),
+ "Duplicate entry in InnerClasses in class file %s",
+ CHECK_0);
+ }
+ }
+ }
+
+ // Set EnclosingMethod class and method indexes.
+ if (parsed_enclosingmethod_attribute) {
+ inner_classes->at_put(index++, enclosing_method_class_index);
+ inner_classes->at_put(index++, enclosing_method_method_index);
+ }
+ assert(index == size, "wrong size");
+
+ // Restore buffer's current position.
+ cfs->set_current(current_mark);
+
+ return length;
+}
+
+void ClassFileParser::parse_classfile_synthetic_attribute(TRAPS) {
+ set_class_synthetic_flag(true);
+}
+
+void ClassFileParser::parse_classfile_signature_attribute(TRAPS) {
+ ClassFileStream* cfs = stream();
+ u2 signature_index = cfs->get_u2(CHECK);
+ check_property(
+ valid_symbol_at(signature_index),
+ "Invalid constant pool index %u in Signature attribute in class file %s",
+ signature_index, CHECK);
+ set_class_generic_signature_index(signature_index);
+}
+
+void ClassFileParser::parse_classfile_bootstrap_methods_attribute(u4 attribute_byte_length, TRAPS) {
+ ClassFileStream* cfs = stream();
+ u1* current_start = cfs->current();
+
+ guarantee_property(attribute_byte_length >= sizeof(u2),
+ "Invalid BootstrapMethods attribute length %u in class file %s",
+ attribute_byte_length,
+ CHECK);
+
+ cfs->guarantee_more(attribute_byte_length, CHECK);
+
+ int attribute_array_length = cfs->get_u2_fast();
+
+ guarantee_property(_max_bootstrap_specifier_index < attribute_array_length,
+ "Short length on BootstrapMethods in class file %s",
+ CHECK);
+
+
+ // The attribute contains a counted array of counted tuples of shorts,
+ // represending bootstrap specifiers:
+ // length*{bootstrap_method_index, argument_count*{argument_index}}
+ int operand_count = (attribute_byte_length - sizeof(u2)) / sizeof(u2);
+ // operand_count = number of shorts in attr, except for leading length
+
+ // The attribute is copied into a short[] array.
+ // The array begins with a series of short[2] pairs, one for each tuple.
+ int index_size = (attribute_array_length * 2);
+
+ Array<u2>* operands = MetadataFactory::new_array<u2>(_loader_data, index_size + operand_count, CHECK);
+
+ // Eagerly assign operands so they will be deallocated with the constant
+ // pool if there is an error.
+ _cp->set_operands(operands);
+
+ int operand_fill_index = index_size;
+ int cp_size = _cp->length();
+
+ for (int n = 0; n < attribute_array_length; n++) {
+ // Store a 32-bit offset into the header of the operand array.
+ ConstantPool::operand_offset_at_put(operands, n, operand_fill_index);
+
+ // Read a bootstrap specifier.
+ cfs->guarantee_more(sizeof(u2) * 2, CHECK); // bsm, argc
+ u2 bootstrap_method_index = cfs->get_u2_fast();
+ u2 argument_count = cfs->get_u2_fast();
+ check_property(
+ valid_cp_range(bootstrap_method_index, cp_size) &&
+ _cp->tag_at(bootstrap_method_index).is_method_handle(),
+ "bootstrap_method_index %u has bad constant type in class file %s",
+ bootstrap_method_index,
+ CHECK);
+
+ guarantee_property((operand_fill_index + 1 + argument_count) < operands->length(),
+ "Invalid BootstrapMethods num_bootstrap_methods or num_bootstrap_arguments value in class file %s",
+ CHECK);
+
+ operands->at_put(operand_fill_index++, bootstrap_method_index);
+ operands->at_put(operand_fill_index++, argument_count);
+
+ cfs->guarantee_more(sizeof(u2) * argument_count, CHECK); // argv[argc]
+ for (int j = 0; j < argument_count; j++) {
+ u2 argument_index = cfs->get_u2_fast();
+ check_property(
+ valid_cp_range(argument_index, cp_size) &&
+ _cp->tag_at(argument_index).is_loadable_constant(),
+ "argument_index %u has bad constant type in class file %s",
+ argument_index,
+ CHECK);
+ operands->at_put(operand_fill_index++, argument_index);
+ }
+ }
+
+ u1* current_end = cfs->current();
+ guarantee_property(current_end == current_start + attribute_byte_length,
+ "Bad length on BootstrapMethods in class file %s",
+ CHECK);
+}
+
+void ClassFileParser::parse_classfile_attributes(ClassFileParser::ClassAnnotationCollector* parsed_annotations,
+ TRAPS) {
+ ClassFileStream* cfs = stream();
+ // Set inner classes attribute to default sentinel
+ _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;
+ bool parsed_bootstrap_methods_attribute = false;
+ 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_type_annotations = NULL;
+ int runtime_visible_type_annotations_length = 0;
+ u1* runtime_invisible_type_annotations = NULL;
+ int runtime_invisible_type_annotations_length = 0;
+ bool runtime_invisible_type_annotations_exists = false;
+ bool runtime_invisible_annotations_exists = false;
+ bool parsed_source_debug_ext_annotations_exist = false;
+ u1* inner_classes_attribute_start = NULL;
+ u4 inner_classes_attribute_length = 0;
+ u2 enclosing_method_class_index = 0;
+ u2 enclosing_method_method_index = 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_symbol_at(attribute_name_index),
+ "Attribute name has bad constant pool index %u in class file %s",
+ attribute_name_index, CHECK);
+ Symbol* 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(CHECK);
+ } else if (tag == vmSymbols::tag_source_debug_extension()) {
+ // Check for SourceDebugExtension tag
+ if (parsed_source_debug_ext_annotations_exist) {
+ classfile_parse_error(
+ "Multiple SourceDebugExtension attributes in class file %s", CHECK);
+ }
+ parsed_source_debug_ext_annotations_exist = true;
+ parse_classfile_source_debug_extension_attribute((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;
+ }
+ inner_classes_attribute_start = cfs->get_u1_buffer();
+ inner_classes_attribute_length = attribute_length;
+ cfs->skip_u1(inner_classes_attribute_length, 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(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(CHECK);
+ } else if (tag == vmSymbols::tag_runtime_visible_annotations()) {
+ if (runtime_visible_annotations != NULL) {
+ classfile_parse_error(
+ "Multiple RuntimeVisibleAnnotations attributes in class file %s", CHECK);
+ }
+ runtime_visible_annotations_length = attribute_length;
+ runtime_visible_annotations = cfs->get_u1_buffer();
+ assert(runtime_visible_annotations != NULL, "null visible annotations");
+ parse_annotations(runtime_visible_annotations,
+ runtime_visible_annotations_length,
+ parsed_annotations,
+ CHECK);
+ cfs->skip_u1(runtime_visible_annotations_length, CHECK);
+ } else if (tag == vmSymbols::tag_runtime_invisible_annotations()) {
+ if (runtime_invisible_annotations_exists) {
+ classfile_parse_error(
+ "Multiple RuntimeInvisibleAnnotations attributes in class file %s", CHECK);
+ }
+ runtime_invisible_annotations_exists = true;
+ if (PreserveAllAnnotations) {
+ runtime_invisible_annotations_length = attribute_length;
+ runtime_invisible_annotations = cfs->get_u1_buffer();
+ assert(runtime_invisible_annotations != NULL, "null invisible annotations");
+ }
+ cfs->skip_u1(attribute_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;
+ }
+ guarantee_property(attribute_length == 4,
+ "Wrong EnclosingMethod attribute length %u in class file %s",
+ attribute_length, CHECK);
+ cfs->guarantee_more(4, CHECK); // class_index, method_index
+ enclosing_method_class_index = cfs->get_u2_fast();
+ enclosing_method_method_index = cfs->get_u2_fast();
+ if (enclosing_method_class_index == 0) {
+ classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", CHECK);
+ }
+ // Validate the constant pool indices and types
+ check_property(valid_klass_reference_at(enclosing_method_class_index),
+ "Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK);
+ if (enclosing_method_method_index != 0 &&
+ (!_cp->is_within_bounds(enclosing_method_method_index) ||
+ !_cp->tag_at(enclosing_method_method_index).is_name_and_type())) {
+ classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", CHECK);
+ }
+ } else if (tag == vmSymbols::tag_bootstrap_methods() &&
+ _major_version >= Verifier::INVOKEDYNAMIC_MAJOR_VERSION) {
+ if (parsed_bootstrap_methods_attribute)
+ classfile_parse_error("Multiple BootstrapMethods attributes in class file %s", CHECK);
+ parsed_bootstrap_methods_attribute = true;
+ parse_classfile_bootstrap_methods_attribute(attribute_length, CHECK);
+ } else if (tag == vmSymbols::tag_runtime_visible_type_annotations()) {
+ if (runtime_visible_type_annotations != NULL) {
+ classfile_parse_error(
+ "Multiple RuntimeVisibleTypeAnnotations attributes in class file %s", CHECK);
+ }
+ runtime_visible_type_annotations_length = attribute_length;
+ runtime_visible_type_annotations = cfs->get_u1_buffer();
+ assert(runtime_visible_type_annotations != NULL, "null visible type annotations");
+ // No need for the VM to parse Type annotations
+ cfs->skip_u1(runtime_visible_type_annotations_length, CHECK);
+ } else if (tag == vmSymbols::tag_runtime_invisible_type_annotations()) {
+ if (runtime_invisible_type_annotations_exists) {
+ classfile_parse_error(
+ "Multiple RuntimeInvisibleTypeAnnotations attributes in class file %s", CHECK);
+ } else {
+ runtime_invisible_type_annotations_exists = true;
+ }
+ if (PreserveAllAnnotations) {
+ runtime_invisible_type_annotations_length = attribute_length;
+ runtime_invisible_type_annotations = cfs->get_u1_buffer();
+ assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
+ }
+ cfs->skip_u1(attribute_length, CHECK);
+ } else {
+ // Unknown attribute
+ cfs->skip_u1(attribute_length, CHECK);
+ }
+ } else {
+ // Unknown attribute
+ cfs->skip_u1(attribute_length, CHECK);
+ }
+ }
+ _annotations = assemble_annotations(runtime_visible_annotations,
+ runtime_visible_annotations_length,
+ runtime_invisible_annotations,
+ runtime_invisible_annotations_length,
+ CHECK);
+ _type_annotations = assemble_annotations(runtime_visible_type_annotations,
+ runtime_visible_type_annotations_length,
+ runtime_invisible_type_annotations,
+ runtime_invisible_type_annotations_length,
+ CHECK);
+
+ if (parsed_innerclasses_attribute || parsed_enclosingmethod_attribute) {
+ u2 num_of_classes = parse_classfile_inner_classes_attribute(
+ inner_classes_attribute_start,
+ parsed_innerclasses_attribute,
+ enclosing_method_class_index,
+ enclosing_method_method_index,
+ CHECK);
+ if (parsed_innerclasses_attribute &&_need_verify && _major_version >= JAVA_1_5_VERSION) {
+ guarantee_property(
+ inner_classes_attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes,
+ "Wrong InnerClasses attribute length in class file %s", CHECK);
+ }
+ }
+
+ if (_max_bootstrap_specifier_index >= 0) {
+ guarantee_property(parsed_bootstrap_methods_attribute,
+ "Missing BootstrapMethods attribute in class file %s", CHECK);
+ }
+}
+
+void ClassFileParser::apply_parsed_class_attributes(instanceKlassHandle k) {
+ if (_synthetic_flag)
+ k->set_is_synthetic();
+ if (_sourcefile_index != 0) {
+ k->set_source_file_name_index(_sourcefile_index);
+ }
+ if (_generic_signature_index != 0) {
+ k->set_generic_signature_index(_generic_signature_index);
+ }
+ if (_sde_buffer != NULL) {
+ k->set_source_debug_extension(_sde_buffer, _sde_length);
+ }
+}
+
+// Transfer ownership of metadata allocated to the InstanceKlass.
+void ClassFileParser::apply_parsed_class_metadata(
+ instanceKlassHandle this_klass,
+ int java_fields_count, TRAPS) {
+ // Assign annotations if needed
+ if (_annotations != NULL || _type_annotations != NULL ||
+ _fields_annotations != NULL || _fields_type_annotations != NULL) {
+ Annotations* annotations = Annotations::allocate(_loader_data, CHECK);
+ annotations->set_class_annotations(_annotations);
+ annotations->set_class_type_annotations(_type_annotations);
+ annotations->set_fields_annotations(_fields_annotations);
+ annotations->set_fields_type_annotations(_fields_type_annotations);
+ this_klass->set_annotations(annotations);
+ }
+
+ _cp->set_pool_holder(this_klass());
+ this_klass->set_constants(_cp);
+ this_klass->set_fields(_fields, java_fields_count);
+ this_klass->set_methods(_methods);
+ this_klass->set_inner_classes(_inner_classes);
+ this_klass->set_local_interfaces(_local_interfaces);
+ this_klass->set_transitive_interfaces(_transitive_interfaces);
+
+ // Clear out these fields so they don't get deallocated by the destructor
+ clear_class_metadata();
+}
+
+AnnotationArray* ClassFileParser::assemble_annotations(u1* runtime_visible_annotations,
+ int runtime_visible_annotations_length,
+ u1* runtime_invisible_annotations,
+ int runtime_invisible_annotations_length, TRAPS) {
+ AnnotationArray* annotations = NULL;
+ if (runtime_visible_annotations != NULL ||
+ runtime_invisible_annotations != NULL) {
+ annotations = MetadataFactory::new_array<u1>(_loader_data,
+ runtime_visible_annotations_length +
+ runtime_invisible_annotations_length,
+ CHECK_(annotations));
+ if (runtime_visible_annotations != NULL) {
+ for (int i = 0; i < runtime_visible_annotations_length; i++) {
+ annotations->at_put(i, runtime_visible_annotations[i]);
+ }
+ }
+ if (runtime_invisible_annotations != NULL) {
+ for (int i = 0; i < runtime_invisible_annotations_length; i++) {
+ int append = runtime_visible_annotations_length+i;
+ annotations->at_put(append, runtime_invisible_annotations[i]);
+ }
+ }
+ }
+ return annotations;
+}
+
+instanceKlassHandle ClassFileParser::parse_super_class(int super_class_index,
+ TRAPS) {
+ instanceKlassHandle super_klass;
+ 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_NULL);
+ } else {
+ check_property(valid_klass_reference_at(super_class_index),
+ "Invalid superclass index %u in class file %s",
+ super_class_index,
+ CHECK_NULL);
+ // The class name should be legal because it is checked when parsing constant pool.
+ // However, make sure it is not an array type.
+ bool is_array = false;
+ if (_cp->tag_at(super_class_index).is_klass()) {
+ super_klass = instanceKlassHandle(THREAD, _cp->resolved_klass_at(super_class_index));
+ if (_need_verify)
+ is_array = super_klass->oop_is_array();
+ } else if (_need_verify) {
+ is_array = (_cp->klass_name_at(super_class_index)->byte_at(0) == JVM_SIGNATURE_ARRAY);
+ }
+ if (_need_verify) {
+ guarantee_property(!is_array,
+ "Bad superclass name in class file %s", CHECK_NULL);
+ }
+ }
+ return super_klass;
+}
+
+
+// Values needed for oopmap and InstanceKlass creation
+class FieldLayoutInfo : public StackObj {
+ public:
+ int* nonstatic_oop_offsets;
+ unsigned int* nonstatic_oop_counts;
+ unsigned int nonstatic_oop_map_count;
+ unsigned int total_oop_map_count;
+ int instance_size;
+ int nonstatic_field_size;
+ int static_field_size;
+ bool has_nonstatic_fields;
+};
+
+// Layout fields and fill in FieldLayoutInfo. Could use more refactoring!
+void ClassFileParser::layout_fields(Handle class_loader,
+ FieldAllocationCount* fac,
+ ClassAnnotationCollector* parsed_annotations,
+ FieldLayoutInfo* info,
+ TRAPS) {
+
+ // Field size and offset computation
+ int nonstatic_field_size = _super_klass() == NULL ? 0 : _super_klass()->nonstatic_field_size();
+ 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_nonstatic_oop_offset;
+ int next_nonstatic_double_offset;
+ int next_nonstatic_word_offset;
+ int next_nonstatic_short_offset;
+ int next_nonstatic_byte_offset;
+ int first_nonstatic_oop_offset;
+ int next_nonstatic_field_offset;
+ int next_nonstatic_padded_offset;
+
+ // Count the contended fields by type.
+ //
+ // We ignore static fields, because @Contended is not supported for them.
+ // The layout code below will also ignore the static fields.
+ int nonstatic_contended_count = 0;
+ FieldAllocationCount fac_contended;
+ for (AllFieldStream fs(_fields, _cp); !fs.done(); fs.next()) {
+ FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
+ if (fs.is_contended()) {
+ fac_contended.count[atype]++;
+ if (!fs.access_flags().is_static()) {
+ nonstatic_contended_count++;
+ }
+ }
+ }
+
+
+ // Calculate the starting byte offsets
+ next_static_oop_offset = InstanceMirrorKlass::offset_of_static_fields();
+ next_static_double_offset = next_static_oop_offset +
+ ((fac->count[STATIC_OOP]) * heapOopSize);
+ if ( fac->count[STATIC_DOUBLE] &&
+ (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->count[STATIC_DOUBLE]) * BytesPerLong);
+ next_static_short_offset = next_static_word_offset +
+ ((fac->count[STATIC_WORD]) * BytesPerInt);
+ next_static_byte_offset = next_static_short_offset +
+ ((fac->count[STATIC_SHORT]) * BytesPerShort);
+
+ int nonstatic_fields_start = instanceOopDesc::base_offset_in_bytes() +
+ nonstatic_field_size * heapOopSize;
+
+ next_nonstatic_field_offset = nonstatic_fields_start;
+
+ bool is_contended_class = parsed_annotations->is_contended();
+
+ // Class is contended, pad before all the fields
+ if (is_contended_class) {
+ next_nonstatic_field_offset += ContendedPaddingWidth;
+ }
+
+ // Compute the non-contended fields count.
+ // The packing code below relies on these counts to determine if some field
+ // can be squeezed into the alignment gap. Contended fields are obviously
+ // exempt from that.
+ unsigned int nonstatic_double_count = fac->count[NONSTATIC_DOUBLE] - fac_contended.count[NONSTATIC_DOUBLE];
+ unsigned int nonstatic_word_count = fac->count[NONSTATIC_WORD] - fac_contended.count[NONSTATIC_WORD];
+ unsigned int nonstatic_short_count = fac->count[NONSTATIC_SHORT] - fac_contended.count[NONSTATIC_SHORT];
+ unsigned int nonstatic_byte_count = fac->count[NONSTATIC_BYTE] - fac_contended.count[NONSTATIC_BYTE];
+ unsigned int nonstatic_oop_count = fac->count[NONSTATIC_OOP] - fac_contended.count[NONSTATIC_OOP];
+
+ // Total non-static fields count, including every contended field
+ unsigned int nonstatic_fields_count = fac->count[NONSTATIC_DOUBLE] + fac->count[NONSTATIC_WORD] +
+ fac->count[NONSTATIC_SHORT] + fac->count[NONSTATIC_BYTE] +
+ fac->count[NONSTATIC_OOP];
+
+ bool super_has_nonstatic_fields =
+ (_super_klass() != NULL && _super_klass->has_nonstatic_fields());
+ bool has_nonstatic_fields = super_has_nonstatic_fields || (nonstatic_fields_count != 0);
+
+
+ // Prepare list of oops for oop map generation.
+ //
+ // "offset" and "count" lists are describing the set of contiguous oop
+ // regions. offset[i] is the start of the i-th region, which then has
+ // count[i] oops following. Before we know how many regions are required,
+ // we pessimistically allocate the maps to fit all the oops into the
+ // distinct regions.
+ //
+ // TODO: We add +1 to always allocate non-zero resource arrays; we need
+ // to figure out if we still need to do this.
+ int* nonstatic_oop_offsets;
+ unsigned int* nonstatic_oop_counts;
+ unsigned int nonstatic_oop_map_count = 0;
+ unsigned int max_nonstatic_oop_maps = fac->count[NONSTATIC_OOP] + 1;
+
+ nonstatic_oop_offsets = NEW_RESOURCE_ARRAY_IN_THREAD(
+ THREAD, int, max_nonstatic_oop_maps);
+ nonstatic_oop_counts = NEW_RESOURCE_ARRAY_IN_THREAD(
+ THREAD, unsigned int, max_nonstatic_oop_maps);
+
+ first_nonstatic_oop_offset = 0; // will be set for first oop field
+
+ bool compact_fields = CompactFields;
+ int allocation_style = FieldsAllocationStyle;
+ if( allocation_style < 0 || allocation_style > 2 ) { // Out of range?
+ assert(false, "0 <= FieldsAllocationStyle <= 2");
+ 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() ||
+ _class_name == vmSymbols::java_lang_Boolean() ||
+ _class_name == vmSymbols::java_lang_Character() ||
+ _class_name == vmSymbols::java_lang_Float() ||
+ _class_name == vmSymbols::java_lang_Double() ||
+ _class_name == vmSymbols::java_lang_Byte() ||
+ _class_name == vmSymbols::java_lang_Short() ||
+ _class_name == vmSymbols::java_lang_Integer() ||
+ _class_name == vmSymbols::java_lang_Long())) {
+ allocation_style = 0; // Allocate oops first
+ compact_fields = false; // Don't compact fields
+ }
+
+ // Rearrange fields for a given allocation style
+ if( allocation_style == 0 ) {
+ // Fields order: oops, longs/doubles, ints, shorts/chars, bytes, padded fields
+ next_nonstatic_oop_offset = next_nonstatic_field_offset;
+ next_nonstatic_double_offset = next_nonstatic_oop_offset +
+ (nonstatic_oop_count * heapOopSize);
+ } else if( allocation_style == 1 ) {
+ // Fields order: longs/doubles, ints, shorts/chars, bytes, oops, padded fields
+ next_nonstatic_double_offset = next_nonstatic_field_offset;
+ } else if( allocation_style == 2 ) {
+ // Fields allocation: oops fields in super and sub classes are together.
+ if( nonstatic_field_size > 0 && _super_klass() != NULL &&
+ _super_klass->nonstatic_oop_map_size() > 0 ) {
+ unsigned int map_count = _super_klass->nonstatic_oop_map_count();
+ OopMapBlock* first_map = _super_klass->start_of_nonstatic_oop_maps();
+ OopMapBlock* last_map = first_map + map_count - 1;
+ int next_offset = last_map->offset() + (last_map->count() * heapOopSize);
+ if (next_offset == next_nonstatic_field_offset) {
+ allocation_style = 0; // allocate oops first
+ next_nonstatic_oop_offset = next_nonstatic_field_offset;
+ next_nonstatic_double_offset = next_nonstatic_oop_offset +
+ (nonstatic_oop_count * heapOopSize);
+ }
+ }
+ if( allocation_style == 2 ) {
+ allocation_style = 1; // allocate oops last
+ 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;
+
+ // Try to squeeze some of the fields into the gaps due to
+ // long/double alignment.
+ 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 >= heapOopSize && 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 -= heapOopSize;
+ offset += heapOopSize;
+ }
+ }
+ }
+
+ 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_padded_offset = next_nonstatic_byte_offset +
+ nonstatic_byte_count;
+
+ // let oops jump before padding with this allocation style
+ if( allocation_style == 1 ) {
+ next_nonstatic_oop_offset = next_nonstatic_padded_offset;
+ if( nonstatic_oop_count > 0 ) {
+ next_nonstatic_oop_offset = align_size_up(next_nonstatic_oop_offset, heapOopSize);
+ }
+ next_nonstatic_padded_offset = next_nonstatic_oop_offset + (nonstatic_oop_count * heapOopSize);
+ }
+
+ // 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).
+ for (AllFieldStream fs(_fields, _cp); !fs.done(); fs.next()) {
+
+ // skip already laid out fields
+ if (fs.is_offset_set()) continue;
+
+ // contended instance fields are handled below
+ if (fs.is_contended() && !fs.access_flags().is_static()) continue;
+
+ int real_offset;
+ FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
+
+ // pack the rest of the fields
+ switch (atype) {
+ case STATIC_OOP:
+ real_offset = next_static_oop_offset;
+ next_static_oop_offset += heapOopSize;
+ 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_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 += heapOopSize;
+ nonstatic_oop_space_count -= 1;
+ } else {
+ real_offset = next_nonstatic_oop_offset;
+ next_nonstatic_oop_offset += heapOopSize;
+ }
+ // Update oop maps
+ if( nonstatic_oop_map_count > 0 &&
+ nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
+ real_offset -
+ int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) *
+ heapOopSize ) {
+ // Extend current oop map
+ assert(nonstatic_oop_map_count - 1 < max_nonstatic_oop_maps, "range check");
+ nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1;
+ } else {
+ // Create new oop map
+ assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check");
+ nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
+ nonstatic_oop_counts [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_DOUBLE:
+ real_offset = next_nonstatic_double_offset;
+ next_nonstatic_double_offset += BytesPerLong;
+ break;
+ default:
+ ShouldNotReachHere();
+ }
+ fs.set_offset(real_offset);
+ }
+
+
+ // Handle the contended cases.
+ //
+ // Each contended field should not intersect the cache line with another contended field.
+ // In the absence of alignment information, we end up with pessimistically separating
+ // the fields with full-width padding.
+ //
+ // Additionally, this should not break alignment for the fields, so we round the alignment up
+ // for each field.
+ if (nonstatic_contended_count > 0) {
+
+ // if there is at least one contended field, we need to have pre-padding for them
+ next_nonstatic_padded_offset += ContendedPaddingWidth;
+
+ // collect all contended groups
+ BitMap bm(_cp->size());
+ for (AllFieldStream fs(_fields, _cp); !fs.done(); fs.next()) {
+ // skip already laid out fields
+ if (fs.is_offset_set()) continue;
+
+ if (fs.is_contended()) {
+ bm.set_bit(fs.contended_group());
+ }
+ }
+
+ int current_group = -1;
+ while ((current_group = (int)bm.get_next_one_offset(current_group + 1)) != (int)bm.size()) {
+
+ for (AllFieldStream fs(_fields, _cp); !fs.done(); fs.next()) {
+
+ // skip already laid out fields
+ if (fs.is_offset_set()) continue;
+
+ // skip non-contended fields and fields from different group
+ if (!fs.is_contended() || (fs.contended_group() != current_group)) continue;
+
+ // handle statics below
+ if (fs.access_flags().is_static()) continue;
+
+ int real_offset;
+ FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
+
+ switch (atype) {
+ case NONSTATIC_BYTE:
+ next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, 1);
+ real_offset = next_nonstatic_padded_offset;
+ next_nonstatic_padded_offset += 1;
+ break;
+
+ case NONSTATIC_SHORT:
+ next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerShort);
+ real_offset = next_nonstatic_padded_offset;
+ next_nonstatic_padded_offset += BytesPerShort;
+ break;
+
+ case NONSTATIC_WORD:
+ next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerInt);
+ real_offset = next_nonstatic_padded_offset;
+ next_nonstatic_padded_offset += BytesPerInt;
+ break;
+
+ case NONSTATIC_DOUBLE:
+ next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerLong);
+ real_offset = next_nonstatic_padded_offset;
+ next_nonstatic_padded_offset += BytesPerLong;
+ break;
+
+ case NONSTATIC_OOP:
+ next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, heapOopSize);
+ real_offset = next_nonstatic_padded_offset;
+ next_nonstatic_padded_offset += heapOopSize;
+
+ // Create new oop map
+ assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check");
+ nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset;
+ nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
+ nonstatic_oop_map_count += 1;
+ if( first_nonstatic_oop_offset == 0 ) { // Undefined
+ first_nonstatic_oop_offset = real_offset;
+ }
+ break;
+
+ default:
+ ShouldNotReachHere();
+ }
+
+ if (fs.contended_group() == 0) {
+ // Contended group defines the equivalence class over the fields:
+ // the fields within the same contended group are not inter-padded.
+ // The only exception is default group, which does not incur the
+ // equivalence, and so requires intra-padding.
+ next_nonstatic_padded_offset += ContendedPaddingWidth;
+ }
+
+ fs.set_offset(real_offset);
+ } // for
+
+ // Start laying out the next group.
+ // Note that this will effectively pad the last group in the back;
+ // this is expected to alleviate memory contention effects for
+ // subclass fields and/or adjacent object.
+ // If this was the default group, the padding is already in place.
+ if (current_group != 0) {
+ next_nonstatic_padded_offset += ContendedPaddingWidth;
+ }
+ }
+
+ // handle static fields
+ }
+
+ // Entire class is contended, pad in the back.
+ // This helps to alleviate memory contention effects for subclass fields
+ // and/or adjacent object.
+ if (is_contended_class) {
+ next_nonstatic_padded_offset += ContendedPaddingWidth;
+ }
+
+ int notaligned_nonstatic_fields_end = next_nonstatic_padded_offset;
+
+ int nonstatic_fields_end = align_size_up(notaligned_nonstatic_fields_end, heapOopSize);
+ int instance_end = align_size_up(notaligned_nonstatic_fields_end, wordSize);
+ int static_fields_end = align_size_up(next_static_byte_offset, wordSize);
+
+ int static_field_size = (static_fields_end -
+ InstanceMirrorKlass::offset_of_static_fields()) / wordSize;
+ nonstatic_field_size = nonstatic_field_size +
+ (nonstatic_fields_end - nonstatic_fields_start) / heapOopSize;
+
+ int instance_size = align_object_size(instance_end / wordSize);
+
+ assert(instance_size == align_object_size(align_size_up(
+ (instanceOopDesc::base_offset_in_bytes() + nonstatic_field_size*heapOopSize),
+ wordSize) / wordSize), "consistent layout helper value");
+
+ // Invariant: nonstatic_field end/start should only change if there are
+ // nonstatic fields in the class, or if the class is contended. We compare
+ // against the non-aligned value, so that end alignment will not fail the
+ // assert without actually having the fields.
+ assert((notaligned_nonstatic_fields_end == nonstatic_fields_start) ||
+ is_contended_class ||
+ (nonstatic_fields_count > 0), "double-check nonstatic start/end");
+
+ // Number of non-static oop map blocks allocated at end of klass.
+ const unsigned int total_oop_map_count =
+ compute_oop_map_count(_super_klass, nonstatic_oop_map_count,
+ first_nonstatic_oop_offset);
+
+#ifndef PRODUCT
+ if (PrintFieldLayout) {
+ print_field_layout(_class_name,
+ _fields,
+ _cp,
+ instance_size,
+ nonstatic_fields_start,
+ nonstatic_fields_end,
+ static_fields_end);
+ }
+
+#endif
+ // Pass back information needed for InstanceKlass creation
+ info->nonstatic_oop_offsets = nonstatic_oop_offsets;
+ info->nonstatic_oop_counts = nonstatic_oop_counts;
+ info->nonstatic_oop_map_count = nonstatic_oop_map_count;
+ info->total_oop_map_count = total_oop_map_count;
+ info->instance_size = instance_size;
+ info->static_field_size = static_field_size;
+ info->nonstatic_field_size = nonstatic_field_size;
+ info->has_nonstatic_fields = has_nonstatic_fields;
+}
+
+
+instanceKlassHandle ClassFileParser::parseClassFile(Symbol* name,
+ ClassLoaderData* loader_data,
+ Handle protection_domain,
+ KlassHandle host_klass,
+ GrowableArray<Handle>* cp_patches,
+ TempNewSymbol& parsed_name,
+ bool verify,
+ TRAPS) {
+
+ // When a retransformable agent is attached, JVMTI caches the
+ // class bytes that existed before the first retransformation.
+ // If RedefineClasses() was used before the retransformable
+ // agent attached, then the cached class bytes may not be the
+ // original class bytes.
+ JvmtiCachedClassFileData *cached_class_file = NULL;
+ Handle class_loader(THREAD, loader_data->class_loader());
+ bool has_default_methods = false;
+ ResourceMark rm(THREAD);
+
+ ClassFileStream* cfs = stream();
+ // Timing
+ assert(THREAD->is_Java_thread(), "must be a JavaThread");
+ JavaThread* jt = (JavaThread*) THREAD;
+
+ PerfClassTraceTime ctimer(ClassLoader::perf_class_parse_time(),
+ ClassLoader::perf_class_parse_selftime(),
+ NULL,
+ jt->get_thread_stat()->perf_recursion_counts_addr(),
+ jt->get_thread_stat()->perf_timers_addr(),
+ PerfClassTraceTime::PARSE_CLASS);
+
+ init_parsed_class_attributes(loader_data);
+
+ if (JvmtiExport::should_post_class_file_load_hook()) {
+ // Get the cached class file bytes (if any) from the class that
+ // is being redefined or retransformed. We use jvmti_thread_state()
+ // instead of JvmtiThreadState::state_for(jt) so we don't allocate
+ // a JvmtiThreadState any earlier than necessary. This will help
+ // avoid the bug described by 7126851.
+ JvmtiThreadState *state = jt->jvmti_thread_state();
+ if (state != NULL) {
+ KlassHandle *h_class_being_redefined =
+ state->get_class_being_redefined();
+ if (h_class_being_redefined != NULL) {
+ instanceKlassHandle ikh_class_being_redefined =
+ instanceKlassHandle(THREAD, (*h_class_being_redefined)());
+ cached_class_file = ikh_class_being_redefined->get_cached_class_file();
+ }
+ }
+
+ 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);
+
+ 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);
+ }
+ }
+
+ _host_klass = host_klass;
+ _cp_patches = cp_patches;
+
+ instanceKlassHandle nullHandle;
+
+ // Figure out whether we can skip format checking (matching classic VM behavior)
+ if (DumpSharedSpaces) {
+ // verify == true means it's a 'remote' class (i.e., non-boot class)
+ // Verification decision is based on BytecodeVerificationRemote flag
+ // for those classes.
+ _need_verify = (verify) ? BytecodeVerificationRemote :
+ BytecodeVerificationLocal;
+ } else {
+ _need_verify = Verifier::should_verify_for(class_loader(), verify);
+ }
+
+ // Set the verify flag in stream
+ cfs->set_verify(_need_verify);
+
+ // Save the class file name for easier error message printing.
+ _class_name = (name != NULL) ? name : vmSymbols::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();
+
+ if (DumpSharedSpaces && major_version < JAVA_1_5_VERSION) {
+ ResourceMark rm;
+ warning("Pre JDK 1.5 class not supported by CDS: %u.%u %s",
+ major_version, minor_version, name->as_C_string());
+ Exceptions::fthrow(
+ THREAD_AND_LOCATION,
+ vmSymbols::java_lang_UnsupportedClassVersionError(),
+ "Unsupported major.minor version for dump time %u.%u",
+ major_version,
+ minor_version);
+ }
+
+ // Check version numbers - we check this even with verifier off
+ if (!is_supported_version(major_version, minor_version)) {
+ if (name == NULL) {
+ Exceptions::fthrow(
+ THREAD_AND_LOCATION,
+ vmSymbols::java_lang_UnsupportedClassVersionError(),
+ "Unsupported class file version %u.%u, "
+ "this version of the Java Runtime only recognizes class file versions up to %u.%u",
+ major_version,
+ minor_version,
+ JAVA_MAX_SUPPORTED_VERSION,
+ JAVA_MAX_SUPPORTED_MINOR_VERSION);
+ } else {
+ ResourceMark rm(THREAD);
+ Exceptions::fthrow(
+ THREAD_AND_LOCATION,
+ vmSymbols::java_lang_UnsupportedClassVersionError(),
+ "%s has been compiled by a more recent version of the Java Runtime (class file version %u.%u), "
+ "this version of the Java Runtime only recognizes class file versions up to %u.%u",
+ name->as_C_string(),
+ major_version,
+ minor_version,
+ JAVA_MAX_SUPPORTED_VERSION,
+ JAVA_MAX_SUPPORTED_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
+ 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));
+
+ Symbol* class_name = cp->klass_name_at(this_class_index);
+ assert(class_name != 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;
+ // parsed_name is returned and can be used if there's an error, so add to
+ // its reference count. Caller will decrement the refcount.
+ parsed_name->increment_refcount();
+
+ // 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));
+ }
+
+ Klass* 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 != NULL && class_name != name) {
+ ResourceMark rm(THREAD);
+ Exceptions::fthrow(
+ THREAD_AND_LOCATION,
+ vmSymbols::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 != NULL) ? name->as_klass_external_name() : "NoName");
+ if (cfs->source() != NULL) tty->print(" from %s", cfs->source());
+ tty->print_cr("]");
+ }
+#if INCLUDE_CDS
+ if (DumpLoadedClassList != NULL && cfs->source() != NULL && classlist_file->is_open()) {
+ // Only dump the classes that can be stored into CDS archive
+ if (SystemDictionaryShared::is_sharing_possible(loader_data)) {
+ if (name != NULL) {
+ ResourceMark rm(THREAD);
+ classlist_file->print_cr("%s", name->as_C_string());
+ classlist_file->flush();
+ }
+ }
+ }
+#endif
+
+ u2 super_class_index = cfs->get_u2_fast();
+ instanceKlassHandle super_klass = parse_super_class(super_class_index,
+ CHECK_NULL);
+
+ // Interfaces
+ u2 itfs_len = cfs->get_u2_fast();
+ Array<Klass*>* local_interfaces =
+ parse_interfaces(itfs_len, protection_domain, _class_name,
+ &has_default_methods, CHECK_(nullHandle));
+
+ u2 java_fields_count = 0;
+ // Fields (offsets are filled in later)
+ FieldAllocationCount fac;
+ Array<u2>* fields = parse_fields(class_name,
+ access_flags.is_interface(),
+ &fac, &java_fields_count,
+ CHECK_(nullHandle));
+ // Methods
+ bool has_final_method = false;
+ AccessFlags promoted_flags;
+ promoted_flags.set_flags(0);
+ Array<Method*>* methods = parse_methods(access_flags.is_interface(),
+ &promoted_flags,
+ &has_final_method,
+ &has_default_methods,
+ CHECK_(nullHandle));
+
+ // Additional attributes
+ ClassAnnotationCollector parsed_annotations;
+ parse_classfile_attributes(&parsed_annotations, 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));
+
+ // We check super class after class file is parsed and format is checked
+ if (super_class_index > 0 && super_klass.is_null()) {
+ Symbol* sk = 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));
+ }
+ Klass* 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.not_null()) {
+
+ if (super_klass->has_default_methods()) {
+ has_default_methods = true;
+ }
+
+ if (super_klass->is_interface()) {
+ ResourceMark rm(THREAD);
+ Exceptions::fthrow(
+ THREAD_AND_LOCATION,
+ vmSymbols::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);
+ }
+ }
+
+ // save super klass for error handling.
+ _super_klass = super_klass;
+
+ // Compute the transitive list of all unique interfaces implemented by this class
+ _transitive_interfaces =
+ compute_transitive_interfaces(super_klass, local_interfaces, CHECK_(nullHandle));
+
+ // sort methods
+ intArray* method_ordering = sort_methods(methods);
+
+ // 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;
+
+ GrowableArray<Method*> all_mirandas(20);
+
+ klassVtable::compute_vtable_size_and_num_mirandas(
+ &vtable_size, &num_miranda_methods, &all_mirandas, super_klass(), methods,
+ access_flags, class_loader, class_name, local_interfaces,
+ CHECK_(nullHandle));
+
+ // Size of Java itable (in words)
+ itable_size = access_flags.is_interface() ? 0 : klassItable::compute_itable_size(_transitive_interfaces);
+
+ FieldLayoutInfo info;
+ layout_fields(class_loader, &fac, &parsed_annotations, &info, CHECK_NULL);
+
+ int total_oop_map_size2 =
+ InstanceKlass::nonstatic_oop_map_size(info.total_oop_map_count);
+
+ // Compute reference type
+ ReferenceType rt;
+ if (super_klass() == NULL) {
+ rt = REF_NONE;
+ } else {
+ rt = super_klass->reference_type();
+ }
+
+ // We can now create the basic Klass* for this klass
+ _klass = InstanceKlass::allocate_instance_klass(loader_data,
+ vtable_size,
+ itable_size,
+ info.static_field_size,
+ total_oop_map_size2,
+ rt,
+ access_flags,
+ name,
+ super_klass(),
+ !host_klass.is_null(),
+ CHECK_(nullHandle));
+ instanceKlassHandle this_klass (THREAD, _klass);
+
+ assert(this_klass->static_field_size() == info.static_field_size, "sanity");
+ assert(this_klass->nonstatic_oop_map_count() == info.total_oop_map_count,
+ "sanity");
+
+ // Fill in information already parsed
+ this_klass->set_should_verify_class(verify);
+ jint lh = Klass::instance_layout_helper(info.instance_size, false);
+ this_klass->set_layout_helper(lh);
+ assert(this_klass->oop_is_instance(), "layout is correct");
+ assert(this_klass->size_helper() == info.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_data(loader_data);
+ this_klass->set_nonstatic_field_size(info.nonstatic_field_size);
+ this_klass->set_has_nonstatic_fields(info.has_nonstatic_fields);
+ this_klass->set_static_oop_field_count(fac.count[STATIC_OOP]);
+
+ apply_parsed_class_metadata(this_klass, java_fields_count, CHECK_NULL);
+
+ if (has_final_method) {
+ this_klass->set_has_final_method();
+ }
+ this_klass->copy_method_ordering(method_ordering, CHECK_NULL);
+ // The InstanceKlass::_methods_jmethod_ids cache
+ // is managed on the assumption that the initial cache
+ // size is equal to the number of methods in the class. If
+ // that changes, then InstanceKlass::idnum_can_increment()
+ // has to be changed accordingly.
+ this_klass->set_initial_method_idnum(methods->length());
+ this_klass->set_name(cp->klass_name_at(this_class_index));
+ if (is_anonymous()) // I am well known to myself
+ cp->klass_at_put(this_class_index, this_klass()); // eagerly resolve
+
+ this_klass->set_minor_version(minor_version);
+ this_klass->set_major_version(major_version);
+ this_klass->set_has_default_methods(has_default_methods);
+
+ if (!host_klass.is_null()) {
+ assert (this_klass->is_anonymous(), "should be the same");
+ this_klass->set_host_klass(host_klass());
+ }
+
+ // Set up Method*::intrinsic_id as soon as we know the names of methods.
+ // (We used to do this lazily, but now we query it in Rewriter,
+ // which is eagerly done for every method, so we might as well do it now,
+ // when everything is fresh in memory.)
+ if (Method::klass_id_for_intrinsics(this_klass()) != vmSymbols::NO_SID) {
+ for (int j = 0; j < methods->length(); j++) {
+ methods->at(j)->init_intrinsic_id();
+ }
+ }
+
+ if (cached_class_file != NULL) {
+ // JVMTI: we have an InstanceKlass now, tell it about the cached bytes
+ this_klass->set_cached_class_file(cached_class_file);
+ }
+
+ // Fill in field values obtained by parse_classfile_attributes
+ if (parsed_annotations.has_any_annotations())
+ parsed_annotations.apply_to(this_klass);
+ apply_parsed_class_attributes(this_klass);
+
+ // 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
+ }
+
+ // 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);
+
+ // Compute transitive closure of interfaces this class implements
+ // Do final class setup
+ fill_oop_maps(this_klass, info.nonstatic_oop_map_count, info.nonstatic_oop_offsets, info.nonstatic_oop_counts);
+
+ // Fill in has_finalizer, has_vanilla_constructor, and layout_helper
+ 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()) {
+ /* An interface in a JAVA 8 classfile can be static */
+ if (_major_version < JAVA_8_VERSION) {
+ check_illegal_static_method(this_klass, CHECK_(nullHandle));
+ }
+ }
+
+ // Allocate mirror and initialize static fields
+ java_lang_Class::create_mirror(this_klass, class_loader, protection_domain,
+ CHECK_(nullHandle));
+
+ // Generate any default methods - default methods are interface methods
+ // that have a default implementation. This is new with Lambda project.
+ if (has_default_methods ) {
+ DefaultMethods::generate_default_methods(
+ this_klass(), &all_mirandas, CHECK_(nullHandle));
+ }
+
+ // Update the loader_data graph.
+ record_defined_class_dependencies(this_klass, CHECK_NULL);
+
+ ClassLoadingService::notify_class_loaded(InstanceKlass::cast(this_klass()),
+ false /* not shared class */);
+
+ if (TraceClassLoading) {
+ ResourceMark rm;
+ // 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()) {
+ Klass* caller =
+ THREAD->is_Java_thread()
+ ? ((JavaThread*)THREAD)->security_get_caller_class(1)
+ : NULL;
+ // caller can be NULL, for example, during a JVMTI VM_Init hook
+ if (caller != NULL) {
+ 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 {
+ tty->print("[Loaded %s from %s]\n", this_klass->external_name(),
+ InstanceKlass::cast(class_loader->klass())->external_name());
+ }
+ }
+
+ if (TraceClassResolution) {
+ ResourceMark rm;
+ // print out the superclass.
+ const char * from = this_klass()->external_name();
+ if (this_klass->java_super() != NULL) {
+ tty->print("RESOLVE %s %s (super)\n", from, InstanceKlass::cast(this_klass->java_super())->external_name());
+ }
+ // print out each of the interface classes referred to by this class.
+ Array<Klass*>* local_interfaces = this_klass->local_interfaces();
+ if (local_interfaces != NULL) {
+ int length = local_interfaces->length();
+ for (int i = 0; i < length; i++) {
+ Klass* k = local_interfaces->at(i);
+ InstanceKlass* to_class = InstanceKlass::cast(k);
+ const char * to = to_class->external_name();
+ tty->print("RESOLVE %s %s (interface)\n", from, to);
+ }
+ }
+ }
+
+ // preserve result across HandleMark
+ preserve_this_klass = this_klass();
+ }
+
+ // Create new handle outside HandleMark (might be needed for
+ // Extended Class Redefinition)
+ instanceKlassHandle this_klass (THREAD, preserve_this_klass);
+ debug_only(this_klass->verify();)
+
+ // Clear class if no error has occurred so destructor doesn't deallocate it
+ _klass = NULL;
+ return this_klass;
+}
+
+// Destructor to clean up if there's an error
+ClassFileParser::~ClassFileParser() {
+ MetadataFactory::free_metadata(_loader_data, _cp);
+ MetadataFactory::free_array<u2>(_loader_data, _fields);
+
+ // Free methods
+ InstanceKlass::deallocate_methods(_loader_data, _methods);
+
+ // beware of the Universe::empty_blah_array!!
+ if (_inner_classes != Universe::the_empty_short_array()) {
+ MetadataFactory::free_array<u2>(_loader_data, _inner_classes);
+ }
+
+ // Free interfaces
+ InstanceKlass::deallocate_interfaces(_loader_data, _super_klass(),
+ _local_interfaces, _transitive_interfaces);
+
+ MetadataFactory::free_array<u1>(_loader_data, _annotations);
+ MetadataFactory::free_array<u1>(_loader_data, _type_annotations);
+ Annotations::free_contents(_loader_data, _fields_annotations);
+ Annotations::free_contents(_loader_data, _fields_type_annotations);
+
+ clear_class_metadata();
+
+ // deallocate the klass if already created. Don't directly deallocate, but add
+ // to the deallocate list so that the klass is removed from the CLD::_klasses list
+ // at a safepoint.
+ if (_klass != NULL) {
+ _loader_data->add_to_deallocate_list(_klass);
+ }
+ _klass = NULL;
+}
+
+void ClassFileParser::print_field_layout(Symbol* name,
+ Array<u2>* fields,
+ constantPoolHandle cp,
+ int instance_size,
+ int instance_fields_start,
+ int instance_fields_end,
+ int static_fields_end) {
+ tty->print("%s: field layout\n", name->as_klass_external_name());
+ tty->print(" @%3d %s\n", instance_fields_start, "--- instance fields start ---");
+ for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
+ if (!fs.access_flags().is_static()) {
+ tty->print(" @%3d \"%s\" %s\n",
+ fs.offset(),
+ fs.name()->as_klass_external_name(),
+ fs.signature()->as_klass_external_name());
+ }
+ }
+ tty->print(" @%3d %s\n", instance_fields_end, "--- instance fields end ---");
+ tty->print(" @%3d %s\n", instance_size * wordSize, "--- instance ends ---");
+ tty->print(" @%3d %s\n", InstanceMirrorKlass::offset_of_static_fields(), "--- static fields start ---");
+ for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) {
+ if (fs.access_flags().is_static()) {
+ tty->print(" @%3d \"%s\" %s\n",
+ fs.offset(),
+ fs.name()->as_klass_external_name(),
+ fs.signature()->as_klass_external_name());
+ }
+ }
+ tty->print(" @%3d %s\n", static_fields_end, "--- static fields end ---");
+ tty->print("\n");
+}
+
+unsigned int
+ClassFileParser::compute_oop_map_count(instanceKlassHandle super,
+ unsigned int nonstatic_oop_map_count,
+ int first_nonstatic_oop_offset) {
+ unsigned int map_count =
+ super.is_null() ? 0 : super->nonstatic_oop_map_count();
+ if (nonstatic_oop_map_count > 0) {
+ // We have oops to add to map
+ if (map_count == 0) {
+ map_count = nonstatic_oop_map_count;
+ } else {
+ // Check whether we should add a new map block or whether the last one can
+ // be extended
+ OopMapBlock* const first_map = super->start_of_nonstatic_oop_maps();
+ OopMapBlock* const last_map = first_map + map_count - 1;
+
+ int next_offset = last_map->offset() + last_map->count() * heapOopSize;
+ 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_count += nonstatic_oop_map_count;
+ }
+ }
+ return map_count;
+}
+
+
+void ClassFileParser::fill_oop_maps(instanceKlassHandle k,
+ unsigned int nonstatic_oop_map_count,
+ int* nonstatic_oop_offsets,
+ unsigned int* nonstatic_oop_counts) {
+ OopMapBlock* this_oop_map = k->start_of_nonstatic_oop_maps();
+ const InstanceKlass* const super = k->superklass();
+ const unsigned int super_count = super ? super->nonstatic_oop_map_count() : 0;
+ if (super_count > 0) {
+ // Copy maps from superklass
+ OopMapBlock* super_oop_map = super->start_of_nonstatic_oop_maps();
+ for (unsigned int i = 0; i < super_count; ++i) {
+ *this_oop_map++ = *super_oop_map++;
+ }
+ }
+
+ if (nonstatic_oop_map_count > 0) {
+ if (super_count + nonstatic_oop_map_count > k->nonstatic_oop_map_count()) {
+ // The counts differ because there is no gap between superklass's last oop
+ // field and the 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_count(this_oop_map->count() + *nonstatic_oop_counts++);
+ this_oop_map++;
+ }
+
+ // Add new map blocks, fill them
+ while (nonstatic_oop_map_count-- > 0) {
+ this_oop_map->set_offset(*nonstatic_oop_offsets++);
+ this_oop_map->set_count(*nonstatic_oop_counts++);
+ this_oop_map++;
+ }
+ assert(k->start_of_nonstatic_oop_maps() + k->nonstatic_oop_map_count() ==
+ this_oop_map, "sanity");
+ }
+}
+
+
+void ClassFileParser::set_precomputed_flags(instanceKlassHandle k) {
+ Klass* 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->has_finalizer())) {
+ k->set_has_finalizer();
+ }
+ }
+
+#ifdef ASSERT
+ bool f = false;
+ Method* m = k->lookup_method(vmSymbols::finalize_method_name(),
+ vmSymbols::void_method_signature());
+ if (m != NULL && !m->is_empty_method()) {
+ f = true;
+ }
+
+ // Spec doesn't prevent agent from redefinition of empty finalizer.
+ // Despite the fact that it's generally bad idea and redefined finalizer
+ // will not work as expected we shouldn't abort vm in this case
+ if (!k->has_redefined_this_or_super()) {
+ 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 (super->has_vanilla_constructor() &&
+ _has_vanilla_constructor) {
+ k->set_has_vanilla_constructor();
+ }
+#ifdef ASSERT
+ bool v = false;
+ if (super->has_vanilla_constructor()) {
+ Method* 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);
+ }
+}
+
+// Attach super classes and interface classes to class loader data
+void ClassFileParser::record_defined_class_dependencies(instanceKlassHandle defined_klass, TRAPS) {
+ ClassLoaderData * defining_loader_data = defined_klass->class_loader_data();
+ if (defining_loader_data->is_the_null_class_loader_data()) {
+ // Dependencies to null class loader data are implicit.
+ return;
+ } else {
+ // add super class dependency
+ Klass* super = defined_klass->super();
+ if (super != NULL) {
+ defining_loader_data->record_dependency(super, CHECK);
+ }
+
+ // add super interface dependencies
+ Array<Klass*>* local_interfaces = defined_klass->local_interfaces();
+ if (local_interfaces != NULL) {
+ int length = local_interfaces->length();
+ for (int i = 0; i < length; i++) {
+ defining_loader_data->record_dependency(local_interfaces->at(i), CHECK);
+ }
+ }
+ }
+}
+
+// utility methods for appending an array with check for duplicates
+
+void append_interfaces(GrowableArray<Klass*>* result, Array<Klass*>* ifs) {
+ // iterate over new interfaces
+ for (int i = 0; i < ifs->length(); i++) {
+ Klass* e = ifs->at(i);
+ assert(e->is_klass() && InstanceKlass::cast(e)->is_interface(), "just checking");
+ // add new interface
+ result->append_if_missing(e);
+ }
+}
+
+Array<Klass*>* ClassFileParser::compute_transitive_interfaces(
+ instanceKlassHandle super,
+ Array<Klass*>* 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++) {
+ Klass* l = local_ifs->at(i);
+ max_transitive_size += InstanceKlass::cast(l)->transitive_interfaces()->length();
+ }
+ // Finally add local interfaces
+ max_transitive_size += local_size;
+ // Construct array
+ if (max_transitive_size == 0) {
+ // no interfaces, use canonicalized array
+ return Universe::the_empty_klass_array();
+ } else if (max_transitive_size == super_size) {
+ // no new local interfaces added, share superklass' transitive interface array
+ return super->transitive_interfaces();
+ } else if (max_transitive_size == local_size) {
+ // only local interfaces added, share local interface array
+ return local_ifs;
+ } else {
+ ResourceMark rm;
+ GrowableArray<Klass*>* result = new GrowableArray<Klass*>(max_transitive_size);
+
+ // Copy down from superclass
+ if (super.not_null()) {
+ append_interfaces(result, super->transitive_interfaces());
+ }
+
+ // Copy down from local interfaces' superinterfaces
+ for (int i = 0; i < local_ifs->length(); i++) {
+ Klass* l = local_ifs->at(i);
+ append_interfaces(result, InstanceKlass::cast(l)->transitive_interfaces());
+ }
+ // Finally add local interfaces
+ append_interfaces(result, local_ifs);
+
+ // length will be less than the max_transitive_size if duplicates were removed
+ int length = result->length();
+ assert(length <= max_transitive_size, "just checking");
+ Array<Klass*>* new_result = MetadataFactory::new_array<Klass*>(_loader_data, length, CHECK_NULL);
+ for (int i = 0; i < length; i++) {
+ Klass* e = result->at(i);
+ assert(e != NULL, "just checking");
+ new_result->at_put(i, e);
+ }
+ return new_result;
+ }
+}
+
+void ClassFileParser::check_super_class_access(instanceKlassHandle this_klass, TRAPS) {
+ Klass* super = this_klass->super();
+ if ((super != NULL) &&
+ (!Reflection::verify_class_access(this_klass(), super, false))) {
+ ResourceMark rm(THREAD);
+ Exceptions::fthrow(
+ THREAD_AND_LOCATION,
+ vmSymbols::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) {
+ Array<Klass*>* local_interfaces = this_klass->local_interfaces();
+ int lng = local_interfaces->length();
+ for (int i = lng - 1; i >= 0; i--) {
+ Klass* k = local_interfaces->at(i);
+ assert (k != NULL && k->is_interface(), "invalid interface");
+ if (!Reflection::verify_class_access(this_klass(), k, false)) {
+ ResourceMark rm(THREAD);
+ Exceptions::fthrow(
+ THREAD_AND_LOCATION,
+ vmSymbols::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) {
+ Array<Method*>* methods = 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++) {
+ Method* m = methods->at(index);
+
+ // skip private, static, and <init> methods
+ if ((!m->is_private() && !m->is_static()) &&
+ (m->name() != vmSymbols::object_initializer_name())) {
+
+ Symbol* name = m->name();
+ Symbol* signature = m->signature();
+ Klass* k = this_klass->super();
+ Method* super_m = NULL;
+ while (k != NULL) {
+ // skip supers that don't have final methods.
+ if (k->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() && !super_m->is_static() &&
+ // matching method in super is final, and not static
+ (Reflection::verify_field_access(this_klass(),
+ 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,
+ vmSymbols::java_lang_VerifyError(),
+ "class %s overrides final method %s.%s%s",
+ this_klass->external_name(),
+ super_m->method_holder()->external_name(),
+ name->as_C_string(),
+ signature->as_C_string()
+ );
+ return;
+ }
+
+ // continue to look from super_m's holder's super.
+ k = super_m->method_holder()->super();
+ continue;
+ }
+
+ k = k->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");
+ Array<Method*>* methods = this_klass->methods();
+ int num_methods = methods->length();
+
+ for (int index = 0; index < num_methods; index++) {
+ Method* m = methods->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,
+ vmSymbols::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,
+ vmSymbols::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) {
+ u2 max_version = JAVA_MAX_SUPPORTED_VERSION;
+ return (major >= JAVA_MIN_SUPPORTED_VERSION) &&
+ (major <= max_version) &&
+ ((major != max_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,
+ vmSymbols::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, Symbol* 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 is_protected = (flags & JVM_ACC_PROTECTED) != 0;
+ const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
+ const bool major_gte_8 = _major_version >= JAVA_8_VERSION;
+ const bool is_initializer = (name == vmSymbols::object_initializer_name());
+
+ bool is_illegal = false;
+
+ if (is_interface) {
+ if (major_gte_8) {
+ // Class file version is JAVA_8_VERSION or later Methods of
+ // interfaces may set any of the flags except ACC_PROTECTED,
+ // ACC_FINAL, ACC_NATIVE, and ACC_SYNCHRONIZED; they must
+ // have exactly one of the ACC_PUBLIC or ACC_PRIVATE flags set.
+ if ((is_public == is_private) || /* Only one of private and public should be true - XNOR */
+ (is_native || is_protected || is_final || is_synchronized) ||
+ // If a specific method of a class or interface has its
+ // ACC_ABSTRACT flag set, it must not have any of its
+ // ACC_FINAL, ACC_NATIVE, ACC_PRIVATE, ACC_STATIC,
+ // ACC_STRICT, or ACC_SYNCHRONIZED flags set. No need to
+ // check for ACC_FINAL, ACC_NATIVE or ACC_SYNCHRONIZED as
+ // those flags are illegal irrespective of ACC_ABSTRACT being set or not.
+ (is_abstract && (is_private || is_static || is_strict))) {
+ is_illegal = true;
+ }
+ } else if (major_gte_15) {
+ // Class file version in the interval [JAVA_1_5_VERSION, JAVA_8_VERSION)
+ if (!is_public || is_static || is_final || is_synchronized ||
+ is_native || !is_abstract || is_strict) {
+ is_illegal = true;
+ }
+ } else {
+ // Class file version is pre-JAVA_1_5_VERSION
+ if (!is_public || is_static || is_final || is_native || !is_abstract) {
+ 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,
+ vmSymbols::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(Symbol* 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,
+ vmSymbols::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(Symbol* 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,
+ vmSymbols::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(Symbol* name, TRAPS) {
+ if (!_need_verify || _relax_verify) { return; }
+
+ assert(name != 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,
+ vmSymbols::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(Symbol* name, Symbol* 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) {
+ throwIllegalSignature("Field", name, signature, CHECK);
+ }
+}
+
+// Checks if signature is a legal method signature.
+// Returns number of parameters
+int ClassFileParser::verify_legal_method_signature(Symbol* name, Symbol* 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
+ throwIllegalSignature("Method", name, signature, CHECK_0);
+ 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 == ';' || 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::Character_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,
+ vmSymbols::isJavaIdentifierStart_name(),
+ vmSymbols::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,
+ vmSymbols::isJavaIdentifierPart_name(),
+ vmSymbols::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;
+}