--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/share/classfile/classFileParser.cpp Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,6159 @@
+/*
+ * Copyright (c) 1997, 2017, 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 "aot/aotLoader.hpp"
+#include "classfile/classFileParser.hpp"
+#include "classfile/classFileStream.hpp"
+#include "classfile/classLoader.hpp"
+#include "classfile/classLoaderData.inline.hpp"
+#include "classfile/defaultMethods.hpp"
+#include "classfile/dictionary.hpp"
+#include "classfile/javaClasses.inline.hpp"
+#include "classfile/moduleEntry.hpp"
+#include "classfile/symbolTable.hpp"
+#include "classfile/systemDictionary.hpp"
+#include "classfile/verificationType.hpp"
+#include "classfile/verifier.hpp"
+#include "classfile/vmSymbols.hpp"
+#include "gc/shared/gcLocker.hpp"
+#include "logging/log.hpp"
+#include "logging/logStream.hpp"
+#include "memory/allocation.hpp"
+#include "memory/metadataFactory.hpp"
+#include "memory/oopFactory.hpp"
+#include "memory/resourceArea.hpp"
+#include "memory/universe.inline.hpp"
+#include "oops/annotations.hpp"
+#include "oops/fieldStreams.hpp"
+#include "oops/instanceKlass.hpp"
+#include "oops/instanceMirrorKlass.hpp"
+#include "oops/klass.inline.hpp"
+#include "oops/klassVtable.hpp"
+#include "oops/metadata.hpp"
+#include "oops/method.hpp"
+#include "oops/oop.inline.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 "trace/traceMacros.hpp"
+#include "utilities/align.hpp"
+#include "utilities/bitMap.inline.hpp"
+#include "utilities/exceptions.hpp"
+#include "utilities/globalDefinitions.hpp"
+#include "utilities/growableArray.hpp"
+#include "utilities/macros.hpp"
+#include "utilities/ostream.hpp"
+#include "utilities/resourceHash.hpp"
+#if INCLUDE_CDS
+#include "classfile/systemDictionaryShared.hpp"
+#endif
+
+// 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 53
+#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 disallow argument and require ACC_STATIC for <clinit> methods
+#define JAVA_7_VERSION 51
+
+// Extension method support.
+#define JAVA_8_VERSION 52
+
+#define JAVA_9_VERSION 53
+
+void ClassFileParser::set_class_bad_constant_seen(short bad_constant) {
+ assert((bad_constant == 19 || bad_constant == 20) && _major_version >= JAVA_9_VERSION,
+ "Unexpected bad constant pool entry");
+ if (_bad_constant_seen == 0) _bad_constant_seen = bad_constant;
+}
+
+void ClassFileParser::parse_constant_pool_entries(const ClassFileStream* const stream,
+ ConstantPool* cp,
+ const int length,
+ TRAPS) {
+ assert(stream != NULL, "invariant");
+ assert(cp != NULL, "invariant");
+
+ // 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().
+ const ClassFileStream cfs1 = *stream;
+ const ClassFileStream* const cfs = &cfs1;
+
+ assert(cfs->allocated_on_stack(), "should be local");
+ debug_only(const u1* const old_current = stream->current();)
+
+ // 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.
+ const u1 tag = cfs->get_u1_fast();
+ switch (tag) {
+ case JVM_CONSTANT_Class : {
+ cfs->guarantee_more(3, CHECK); // name_index, tag/access_flags
+ const 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
+ const u2 class_index = cfs->get_u2_fast();
+ const 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
+ const u2 class_index = cfs->get_u2_fast();
+ const 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
+ const u2 class_index = cfs->get_u2_fast();
+ const 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
+ const 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
+ const u1 ref_kind = cfs->get_u1_fast();
+ const 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
+ const 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
+ const u2 bootstrap_specifier_index = cfs->get_u2_fast();
+ const 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
+ const 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
+ const 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
+ const 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
+ const 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
+ const u2 name_index = cfs->get_u2_fast();
+ const 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();
+ const u1* utf8_buffer = cfs->current();
+ 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(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);
+ const char* const str = java_lang_String::as_utf8_string(patch());
+ // (could use java_lang_String::as_symbol instead, but might as well batch them)
+ utf8_buffer = (const u1*) str;
+ utf8_length = (int) strlen(str);
+ }
+
+ unsigned int hash;
+ Symbol* const result = SymbolTable::lookup_only((const char*)utf8_buffer,
+ utf8_length,
+ hash);
+ if (result == NULL) {
+ names[names_count] = (const 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;
+ }
+ case 19:
+ case 20: {
+ // Record that an error occurred in these two cases but keep parsing so
+ // that ACC_Module can be checked for in the access_flags. Need to
+ // throw NoClassDefFoundError in that case.
+ if (_major_version >= JAVA_9_VERSION) {
+ cfs->guarantee_more(3, CHECK);
+ cfs->get_u2_fast();
+ set_class_bad_constant_seen(tag);
+ break;
+ }
+ }
+ default: {
+ classfile_parse_error("Unknown constant tag %u in class file %s",
+ tag,
+ CHECK);
+ break;
+ }
+ } // end of switch(tag)
+ } // end of for
+
+ // 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.
+ assert(stream->current() == old_current, "non-exclusive use of stream");
+ stream->set_current(cfs1.current());
+
+}
+
+static inline bool valid_cp_range(int index, int length) {
+ return (index > 0 && index < length);
+}
+
+static inline Symbol* check_symbol_at(const ConstantPool* cp, int index) {
+ assert(cp != NULL, "invariant");
+ if (valid_cp_range(index, cp->length()) && cp->tag_at(index).is_utf8()) {
+ return cp->symbol_at(index);
+ }
+ return NULL;
+}
+
+#ifdef ASSERT
+PRAGMA_DIAG_PUSH
+PRAGMA_FORMAT_NONLITERAL_IGNORED
+void ClassFileParser::report_assert_property_failure(const char* msg, TRAPS) const {
+ ResourceMark rm(THREAD);
+ fatal(msg, _class_name->as_C_string());
+}
+
+void ClassFileParser::report_assert_property_failure(const char* msg,
+ int index,
+ TRAPS) const {
+ ResourceMark rm(THREAD);
+ fatal(msg, index, _class_name->as_C_string());
+}
+PRAGMA_DIAG_POP
+#endif
+
+void ClassFileParser::parse_constant_pool(const ClassFileStream* const stream,
+ ConstantPool* const cp,
+ const int length,
+ TRAPS) {
+ assert(cp != NULL, "invariant");
+ assert(stream != NULL, "invariant");
+
+ // parsing constant pool entries
+ parse_constant_pool_entries(stream, cp, length, CHECK);
+ if (class_bad_constant_seen() != 0) {
+ // a bad CP entry has been detected previously so stop parsing and just return.
+ return;
+ }
+
+ int index = 1; // declared outside of loops for portability
+ int num_klasses = 0;
+
+ // first verification pass - validate cross references
+ // and fixup class and string constants
+ for (index = 1; index < length; index++) { // Index 0 is unused
+ const 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;
+ const int klass_ref_index = cp->klass_ref_index_at(index);
+ const 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);
+ 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);
+ 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);
+ break;
+ }
+ case JVM_CONSTANT_NameAndType: {
+ if (!_need_verify) break;
+ const int name_ref_index = cp->name_ref_index_at(index);
+ const 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);
+ check_property(valid_symbol_at(signature_ref_index),
+ "Invalid constant pool index %u in class file %s",
+ signature_ref_index, CHECK);
+ 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: {
+ const 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);
+ cp->unresolved_klass_at_put(index, class_index, num_klasses++);
+ break;
+ }
+ case JVM_CONSTANT_StringIndex: {
+ const 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);
+ Symbol* const sym = cp->symbol_at(string_index);
+ cp->unresolved_string_at_put(index, sym);
+ break;
+ }
+ case JVM_CONSTANT_MethodHandle: {
+ const 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);
+ const constantTag tag = cp->tag_at(ref_index);
+ const 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);
+ 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);
+ 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);
+ 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);
+ break;
+ }
+ default: {
+ classfile_parse_error(
+ "Bad method handle kind at constant pool index %u in class file %s",
+ index, CHECK);
+ }
+ } // switch(refkind)
+ // Keep the ref_index unchanged. It will be indirected at link-time.
+ break;
+ } // case MethodHandle
+ case JVM_CONSTANT_MethodType: {
+ const 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);
+ break;
+ }
+ case JVM_CONSTANT_InvokeDynamic: {
+ const 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);
+ // bootstrap specifier index must be checked later,
+ // when BootstrapMethods attr is available
+ break;
+ }
+ default: {
+ fatal("bad constant pool tag value %u", cp->tag_at(index).value());
+ ShouldNotReachHere();
+ break;
+ }
+ } // switch(tag)
+ } // end of for
+
+ _first_patched_klass_resolved_index = num_klasses;
+ cp->allocate_resolved_klasses(_loader_data, num_klasses + _max_num_patched_klasses, CHECK);
+
+ if (_cp_patches != NULL) {
+ // need to treat this_class specially...
+
+ // Add dummy utf8 entries in the space reserved for names of patched classes. We'll use "*"
+ // for now. These will be replaced with actual names of the patched classes in patch_class().
+ Symbol* s = vmSymbols::star_name();
+ for (int n=_orig_cp_size; n<cp->length(); n++) {
+ cp->symbol_at_put(n, s);
+ }
+
+ int this_class_index;
+ {
+ stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len
+ const u1* const mark = stream->current();
+ stream->skip_u2_fast(1); // skip flags
+ this_class_index = stream->get_u2_fast();
+ stream->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);
+ patch_constant_pool(cp, index, cp_patch_at(index), CHECK);
+ }
+ }
+ }
+
+ if (!_need_verify) {
+ return;
+ }
+
+ // second verification pass - checks the strings are of the right format.
+ // but not yet to the other entries
+ for (index = 1; index < length; index++) {
+ const jbyte tag = cp->tag_at(index).value();
+ switch (tag) {
+ case JVM_CONSTANT_UnresolvedClass: {
+ const Symbol* const class_name = cp->klass_name_at(index);
+ // check the name, even if _cp_patches will overwrite it
+ verify_legal_class_name(class_name, CHECK);
+ break;
+ }
+ case JVM_CONSTANT_NameAndType: {
+ if (_need_verify) {
+ const int sig_index = cp->signature_ref_index_at(index);
+ const int name_index = cp->name_ref_index_at(index);
+ const Symbol* const name = cp->symbol_at(name_index);
+ const Symbol* const sig = cp->symbol_at(sig_index);
+ guarantee_property(sig->utf8_length() != 0,
+ "Illegal zero length constant pool entry at %d in class %s",
+ sig_index, CHECK);
+ guarantee_property(name->utf8_length() != 0,
+ "Illegal zero length constant pool entry at %d in class %s",
+ name_index, CHECK);
+
+ if (sig->byte_at(0) == JVM_SIGNATURE_FUNC) {
+ // Format check method name and signature
+ verify_legal_method_name(name, CHECK);
+ verify_legal_method_signature(name, sig, CHECK);
+ } else {
+ // Format check field name and signature
+ verify_legal_field_name(name, CHECK);
+ verify_legal_field_signature(name, sig, CHECK);
+ }
+ }
+ break;
+ }
+ case JVM_CONSTANT_InvokeDynamic:
+ case JVM_CONSTANT_Fieldref:
+ case JVM_CONSTANT_Methodref:
+ case JVM_CONSTANT_InterfaceMethodref: {
+ const int name_and_type_ref_index =
+ cp->name_and_type_ref_index_at(index);
+ // already verified to be utf8
+ const int name_ref_index =
+ cp->name_ref_index_at(name_and_type_ref_index);
+ // already verified to be utf8
+ const int signature_ref_index =
+ cp->signature_ref_index_at(name_and_type_ref_index);
+ const Symbol* const name = cp->symbol_at(name_ref_index);
+ const Symbol* const signature = cp->symbol_at(signature_ref_index);
+ if (tag == JVM_CONSTANT_Fieldref) {
+ if (_need_verify) {
+ // Field name and signature are verified above, when iterating NameAndType_info.
+ // Need only to be sure signature is non-zero length and the right type.
+ if (signature->utf8_length() == 0 ||
+ signature->byte_at(0) == JVM_SIGNATURE_FUNC) {
+ throwIllegalSignature("Field", name, signature, CHECK);
+ }
+ }
+ } else {
+ if (_need_verify) {
+ // Method name and signature are verified above, when iterating NameAndType_info.
+ // Need only to be sure signature is non-zero length and the right type.
+ if (signature->utf8_length() == 0 ||
+ signature->byte_at(0) != JVM_SIGNATURE_FUNC) {
+ throwIllegalSignature("Method", name, signature, CHECK);
+ }
+ }
+ // 4509014: If a class method name begins with '<', it must be "<init>"
+ const unsigned int name_len = name->utf8_length();
+ if (tag == JVM_CONSTANT_Methodref &&
+ name_len != 0 &&
+ name->byte_at(0) == '<' &&
+ name != vmSymbols::object_initializer_name()) {
+ classfile_parse_error(
+ "Bad method name at constant pool index %u in class file %s",
+ name_ref_index, CHECK);
+ }
+ }
+ break;
+ }
+ case JVM_CONSTANT_MethodHandle: {
+ const int ref_index = cp->method_handle_index_at(index);
+ const 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: {
+ const int name_and_type_ref_index =
+ cp->name_and_type_ref_index_at(ref_index);
+ const int name_ref_index =
+ cp->name_ref_index_at(name_and_type_ref_index);
+ const Symbol* const 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);
+ }
+ } 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);
+ }
+ }
+ break;
+ }
+ // Other ref_kinds are already fully checked in previous pass.
+ } // switch(ref_kind)
+ break;
+ }
+ case JVM_CONSTANT_MethodType: {
+ const Symbol* const no_name = vmSymbols::type_name(); // place holder
+ const Symbol* const signature = cp->method_type_signature_at(index);
+ verify_legal_method_signature(no_name, signature, CHECK);
+ break;
+ }
+ case JVM_CONSTANT_Utf8: {
+ assert(cp->symbol_at(index)->refcount() != 0, "count corrupted");
+ }
+ } // switch(tag)
+ } // end of for
+}
+
+void ClassFileParser::patch_class(ConstantPool* cp, int class_index, Klass* k, Symbol* name) {
+ int name_index = _orig_cp_size + _num_patched_klasses;
+ int resolved_klass_index = _first_patched_klass_resolved_index + _num_patched_klasses;
+
+ cp->klass_at_put(class_index, name_index, resolved_klass_index, k, name);
+ _num_patched_klasses ++;
+}
+
+void ClassFileParser::patch_constant_pool(ConstantPool* cp,
+ int index,
+ Handle patch,
+ TRAPS) {
+ assert(cp != NULL, "invariant");
+
+ 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);
+ Klass* k = java_lang_Class::as_Klass(patch());
+ patch_class(cp, index, k, k->name());
+ } else {
+ guarantee_property(java_lang_String::is_instance(patch()),
+ "Illegal class patch at %d in class file %s",
+ index, CHECK);
+ Symbol* const name = java_lang_String::as_symbol(patch(), CHECK);
+ patch_class(cp, index, NULL, 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, "");
+ }
+ } // end patch_prim label
+ 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;
+ }
+ } // end of switch(tag)
+
+ // On fall-through, mark the patch as used.
+ clear_cp_patch_at(index);
+}
+class NameSigHash: public ResourceObj {
+ public:
+ const Symbol* _name; // name
+ const Symbol* _sig; // signature
+ NameSigHash* _next; // Next entry in hash table
+};
+
+static const int HASH_ROW_SIZE = 256;
+
+static unsigned int hash(const Symbol* name, const 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;
+}
+
+
+static 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.
+static bool put_after_lookup(const Symbol* name, const 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;
+}
+
+// Side-effects: populates the _local_interfaces field
+void ClassFileParser::parse_interfaces(const ClassFileStream* const stream,
+ const int itfs_len,
+ ConstantPool* const cp,
+ bool* const has_nonstatic_concrete_methods,
+ TRAPS) {
+ assert(stream != NULL, "invariant");
+ assert(cp != NULL, "invariant");
+ assert(has_nonstatic_concrete_methods != NULL, "invariant");
+
+ if (itfs_len == 0) {
+ _local_interfaces = Universe::the_empty_klass_array();
+ } else {
+ assert(itfs_len > 0, "only called for len>0");
+ _local_interfaces = MetadataFactory::new_array<Klass*>(_loader_data, itfs_len, NULL, CHECK);
+
+ int index;
+ for (index = 0; index < itfs_len; index++) {
+ const u2 interface_index = stream->get_u2(CHECK);
+ Klass* interf;
+ check_property(
+ valid_klass_reference_at(interface_index),
+ "Interface name has bad constant pool index %u in class file %s",
+ interface_index, CHECK);
+ if (cp->tag_at(interface_index).is_klass()) {
+ interf = cp->resolved_klass_at(interface_index);
+ } else {
+ Symbol* const 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);
+
+ // Call resolve_super so classcircularity is checked
+ interf = SystemDictionary::resolve_super_or_fail(
+ _class_name,
+ unresolved_klass,
+ Handle(THREAD, _loader_data->class_loader()),
+ _protection_domain,
+ false,
+ CHECK);
+ }
+
+ if (!interf->is_interface()) {
+ THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(),
+ "Implementing class");
+ }
+
+ if (InstanceKlass::cast(interf)->has_nonstatic_concrete_methods()) {
+ *has_nonstatic_concrete_methods = true;
+ }
+ _local_interfaces->at_put(index, interf);
+ }
+
+ if (!_need_verify || itfs_len <= 1) {
+ return;
+ }
+
+ // 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;
+ const Symbol* name = NULL;
+ {
+ debug_only(NoSafepointVerifier nsv;)
+ for (index = 0; index < itfs_len; index++) {
+ const Klass* const k = _local_interfaces->at(index);
+ 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 \"%s\" in class file %s",
+ name->as_C_string(), CHECK);
+ }
+ }
+}
+
+void ClassFileParser::verify_constantvalue(const ConstantPool* const cp,
+ int constantvalue_index,
+ int signature_index,
+ TRAPS) const {
+ // 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);
+
+ const 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);
+ }
+ }
+}
+
+class AnnotationCollector : public ResourceObj{
+public:
+ enum Location { _in_field, _in_method, _in_class };
+ enum ID {
+ _unknown = 0,
+ _method_CallerSensitive,
+ _method_ForceInline,
+ _method_DontInline,
+ _method_InjectedProfile,
+ _method_LambdaForm_Compiled,
+ _method_LambdaForm_Hidden,
+ _method_HotSpotIntrinsicCandidate,
+ _jdk_internal_vm_annotation_Contended,
+ _field_Stable,
+ _jdk_internal_vm_annotation_ReservedStackAccess,
+ _annotation_LIMIT
+ };
+ const Location _location;
+ int _annotations_present;
+ u2 _contended_group;
+
+ AnnotationCollector(Location location)
+ : _location(location), _annotations_present(0)
+ {
+ assert((int)_annotation_LIMIT <= (int)sizeof(_annotations_present) * BitsPerByte, "");
+ }
+ // If this annotation name has an ID, report it (or _none).
+ ID annotation_index(const ClassLoaderData* loader_data, const Symbol* name);
+ // Set the annotation name:
+ void set_annotation(ID id) {
+ assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
+ _annotations_present |= nth_bit((int)id);
+ }
+
+ void remove_annotation(ID id) {
+ assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
+ _annotations_present &= ~nth_bit((int)id);
+ }
+
+ // Report if the annotation is present.
+ bool has_any_annotations() const { return _annotations_present != 0; }
+ bool has_annotation(ID id) const { return (nth_bit((int)id) & _annotations_present) != 0; }
+
+ void set_contended_group(u2 group) { _contended_group = group; }
+ u2 contended_group() const { return _contended_group; }
+
+ bool is_contended() const { return has_annotation(_jdk_internal_vm_annotation_Contended); }
+
+ void set_stable(bool stable) { set_annotation(_field_Stable); }
+ bool is_stable() const { return has_annotation(_field_Stable); }
+};
+
+// This class also doubles as a holder for metadata cleanup.
+class ClassFileParser::FieldAnnotationCollector : public AnnotationCollector {
+private:
+ ClassLoaderData* _loader_data;
+ AnnotationArray* _field_annotations;
+ AnnotationArray* _field_type_annotations;
+public:
+ FieldAnnotationCollector(ClassLoaderData* loader_data) :
+ AnnotationCollector(_in_field),
+ _loader_data(loader_data),
+ _field_annotations(NULL),
+ _field_type_annotations(NULL) {}
+ ~FieldAnnotationCollector();
+ void apply_to(FieldInfo* f);
+ AnnotationArray* field_annotations() { return _field_annotations; }
+ AnnotationArray* field_type_annotations() { return _field_type_annotations; }
+
+ void set_field_annotations(AnnotationArray* a) { _field_annotations = a; }
+ void set_field_type_annotations(AnnotationArray* a) { _field_type_annotations = a; }
+};
+
+class MethodAnnotationCollector : public AnnotationCollector{
+public:
+ MethodAnnotationCollector() : AnnotationCollector(_in_method) { }
+ void apply_to(const methodHandle& m);
+};
+
+class ClassFileParser::ClassAnnotationCollector : public AnnotationCollector{
+public:
+ ClassAnnotationCollector() : AnnotationCollector(_in_class) { }
+ void apply_to(InstanceKlass* ik);
+};
+
+
+static int skip_annotation_value(const u1*, int, int); // fwd decl
+
+// Safely increment index by val if does not pass limit
+#define SAFE_ADD(index, limit, val) \
+if (index >= limit - val) return limit; \
+index += val;
+
+// Skip an annotation. Return >=limit if there is any problem.
+static int skip_annotation(const u1* buffer, int limit, int index) {
+ assert(buffer != NULL, "invariant");
+ // annotation := atype:u2 do(nmem:u2) {member:u2 value}
+ // value := switch (tag:u1) { ... }
+ SAFE_ADD(index, limit, 4); // skip atype and read nmem
+ int nmem = Bytes::get_Java_u2((address)buffer + index - 2);
+ while (--nmem >= 0 && index < limit) {
+ SAFE_ADD(index, limit, 2); // skip member
+ index = skip_annotation_value(buffer, limit, index);
+ }
+ return index;
+}
+
+// Skip an annotation value. Return >=limit if there is any problem.
+static int skip_annotation_value(const u1* buffer, int limit, int index) {
+ assert(buffer != NULL, "invariant");
+
+ // 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;
+ // }
+ SAFE_ADD(index, limit, 1); // read tag
+ const 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':
+ SAFE_ADD(index, limit, 2); // skip con or s_con
+ break;
+ case 'e':
+ SAFE_ADD(index, limit, 4); // skip e_class, e_name
+ break;
+ case '[':
+ {
+ SAFE_ADD(index, limit, 2); // read nval
+ int nval = Bytes::get_Java_u2((address)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:
+ return limit; // bad tag byte
+ }
+ return index;
+}
+
+// Sift through annotations, looking for those significant to the VM:
+static void parse_annotations(const ConstantPool* const cp,
+ const u1* buffer, int limit,
+ AnnotationCollector* coll,
+ ClassLoaderData* loader_data,
+ TRAPS) {
+
+ assert(cp != NULL, "invariant");
+ assert(buffer != NULL, "invariant");
+ assert(coll != NULL, "invariant");
+ assert(loader_data != NULL, "invariant");
+
+ // annotations := do(nann:u2) {annotation}
+ int index = 2; // read nann
+ if (index >= limit) return;
+ int nann = Bytes::get_Java_u2((address)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)
+ };
+ // Cannot add min_size to index in case of overflow MAX_INT
+ while ((--nann) >= 0 && (index - 2 <= limit - min_size)) {
+ int index0 = index;
+ index = skip_annotation(buffer, limit, index);
+ const u1* const abase = buffer + index0;
+ const int atype = Bytes::get_Java_u2((address)abase + atype_off);
+ const int count = Bytes::get_Java_u2((address)abase + count_off);
+ const Symbol* const aname = check_symbol_at(cp, atype);
+ if (aname == NULL) break; // invalid annotation name
+ const Symbol* member = NULL;
+ if (count >= 1) {
+ const int member_index = Bytes::get_Java_u2((address)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 (AnnotationCollector::_unknown == id) continue;
+ coll->set_annotation(id);
+
+ if (AnnotationCollector::_jdk_internal_vm_annotation_Contended == id) {
+ // @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((address)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);
+ }
+ }
+}
+
+
+// Parse attributes for a field.
+void ClassFileParser::parse_field_attributes(const ClassFileStream* const cfs,
+ u2 attributes_count,
+ bool is_static, u2 signature_index,
+ u2* const constantvalue_index_addr,
+ bool* const is_synthetic_addr,
+ u2* const generic_signature_index_addr,
+ ClassFileParser::FieldAnnotationCollector* parsed_annotations,
+ TRAPS) {
+ assert(cfs != NULL, "invariant");
+ assert(constantvalue_index_addr != NULL, "invariant");
+ assert(is_synthetic_addr != NULL, "invariant");
+ assert(generic_signature_index_addr != NULL, "invariant");
+ assert(parsed_annotations != NULL, "invariant");
+ assert(attributes_count > 0, "attributes_count should be greater than 0");
+
+ u2 constantvalue_index = 0;
+ u2 generic_signature_index = 0;
+ bool is_synthetic = false;
+ const u1* runtime_visible_annotations = NULL;
+ int runtime_visible_annotations_length = 0;
+ const u1* runtime_invisible_annotations = NULL;
+ int runtime_invisible_annotations_length = 0;
+ const u1* runtime_visible_type_annotations = NULL;
+ int runtime_visible_type_annotations_length = 0;
+ const 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;
+ const ConstantPool* const cp = _cp;
+
+ while (attributes_count--) {
+ cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
+ const u2 attribute_name_index = cfs->get_u2_fast();
+ const 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);
+
+ const Symbol* const 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(cp, 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 (generic_signature_index != 0) {
+ classfile_parse_error(
+ "Multiple Signature attributes for field in class file %s", CHECK);
+ }
+ 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(cfs, 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->current();
+ assert(runtime_visible_annotations != NULL, "null visible annotations");
+ cfs->guarantee_more(runtime_visible_annotations_length, CHECK);
+ parse_annotations(cp,
+ runtime_visible_annotations,
+ runtime_visible_annotations_length,
+ parsed_annotations,
+ _loader_data,
+ CHECK);
+ cfs->skip_u1_fast(runtime_visible_annotations_length);
+ } 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->current();
+ 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->current();
+ 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->current();
+ 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 ClassFileParser::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);
+ if (atype != BAD_ALLOCATION_TYPE) {
+ // Make sure there is no overflow with injected fields.
+ assert(count[atype] < 0xFFFF, "More than 65535 fields");
+ count[atype]++;
+ }
+ return atype;
+ }
+};
+
+// Side-effects: populates the _fields, _fields_annotations,
+// _fields_type_annotations fields
+void ClassFileParser::parse_fields(const ClassFileStream* const cfs,
+ bool is_interface,
+ FieldAllocationCount* const fac,
+ ConstantPool* cp,
+ const int cp_size,
+ u2* const java_fields_count_ptr,
+ TRAPS) {
+
+ assert(cfs != NULL, "invariant");
+ assert(fac != NULL, "invariant");
+ assert(cp != NULL, "invariant");
+ assert(java_fields_count_ptr != NULL, "invariant");
+
+ assert(NULL == _fields, "invariant");
+ assert(NULL == _fields_annotations, "invariant");
+ assert(NULL == _fields_type_annotations, "invariant");
+
+ cfs->guarantee_more(2, CHECK); // length
+ const u2 length = cfs->get_u2_fast();
+ *java_fields_count_ptr = length;
+
+ int num_injected = 0;
+ const InjectedField* const injected = JavaClasses::get_injected(_class_name,
+ &num_injected);
+ const 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* const 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++) {
+ // access_flags, name_index, descriptor_index, attributes_count
+ cfs->guarantee_more(8, CHECK);
+
+ AccessFlags access_flags;
+ const jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_FIELD_MODIFIERS;
+ verify_legal_field_modifiers(flags, is_interface, CHECK);
+ access_flags.set_flags(flags);
+
+ const u2 name_index = cfs->get_u2_fast();
+ check_property(valid_symbol_at(name_index),
+ "Invalid constant pool index %u for field name in class file %s",
+ name_index, CHECK);
+ const Symbol* const name = cp->symbol_at(name_index);
+ verify_legal_field_name(name, CHECK);
+
+ const 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);
+ const Symbol* const sig = cp->symbol_at(signature_index);
+ verify_legal_field_signature(name, sig, CHECK);
+
+ u2 constantvalue_index = 0;
+ bool is_synthetic = false;
+ u2 generic_signature_index = 0;
+ const bool is_static = access_flags.is_static();
+ FieldAnnotationCollector parsed_annotations(_loader_data);
+
+ const u2 attributes_count = cfs->get_u2_fast();
+ if (attributes_count > 0) {
+ parse_field_attributes(cfs,
+ attributes_count,
+ is_static,
+ signature_index,
+ &constantvalue_index,
+ &is_synthetic,
+ &generic_signature_index,
+ &parsed_annotations,
+ CHECK);
+
+ if (parsed_annotations.field_annotations() != NULL) {
+ if (_fields_annotations == NULL) {
+ _fields_annotations = MetadataFactory::new_array<AnnotationArray*>(
+ _loader_data, length, NULL,
+ CHECK);
+ }
+ _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);
+ }
+ _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* const field = FieldInfo::from_field_array(fa, n);
+ field->initialize(access_flags.as_short(),
+ name_index,
+ signature_index,
+ constantvalue_index);
+ const BasicType type = cp->basic_type_for_signature_at(signature_index);
+
+ // Remember how many oops we encountered and compute allocation type
+ const 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) {
+ const Symbol* const name = injected[n].name();
+ const Symbol* const signature = injected[n].signature();
+ bool duplicate = false;
+ for (int i = 0; i < length; i++) {
+ const FieldInfo* const 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* const field = FieldInfo::from_field_array(fa, index);
+ field->initialize(JVM_ACC_FIELD_INTERNAL,
+ injected[n].name_index,
+ injected[n].signature_index,
+ 0);
+
+ const BasicType type = FieldType::basic_type(injected[n].signature());
+
+ // Remember how many oops we encountered and compute allocation type
+ const FieldAllocationType atype = fac->update(false, type);
+ field->set_allocation_type(atype);
+ index++;
+ }
+ }
+
+ assert(NULL == _fields, "invariant");
+
+ _fields =
+ MetadataFactory::new_array<u2>(_loader_data,
+ index * FieldInfo::field_slots + num_generic_signature,
+ CHECK);
+ // 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.
+ {
+ 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(_fields->length() == i, "");
+ }
+
+ 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;
+ const Symbol* name = NULL;
+ const Symbol* sig = NULL;
+ {
+ debug_only(NoSafepointVerifier nsv;)
+ for (AllFieldStream fs(_fields, cp); !fs.done(); fs.next()) {
+ name = fs.name();
+ 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 \"%s\" with signature \"%s\" in class file %s",
+ name->as_C_string(), sig->as_klass_external_name(), CHECK);
+ }
+ }
+}
+
+
+const ClassFileParser::unsafe_u2* ClassFileParser::parse_exception_table(const ClassFileStream* const cfs,
+ u4 code_length,
+ u4 exception_table_length,
+ TRAPS) {
+ assert(cfs != NULL, "invariant");
+
+ const unsafe_u2* const exception_table_start = cfs->current();
+ 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++) {
+ const u2 start_pc = cfs->get_u2_fast();
+ const u2 end_pc = cfs->get_u2_fast();
+ const u2 handler_pc = cfs->get_u2_fast();
+ const 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**const write_stream,
+ TRAPS) {
+
+ const ClassFileStream* const cfs = _stream;
+ unsigned int num_entries = cfs->get_u2(CHECK);
+
+ // Each entry is a u2 start_pc, and a u2 line_number
+ const unsigned int length_in_bytes = num_entries * (sizeof(u2) * 2);
+
+ // 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) {
+ const u2 bci = cfs->get_u2_fast(); // start_pc
+ const 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 LVT_Hash : public AllStatic {
+ public:
+
+ static bool equals(LocalVariableTableElement const& e0, LocalVariableTableElement const& e1) {
+ /*
+ * 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
+ */
+ return (e0.start_bci == e1.start_bci &&
+ e0.length == e1.length &&
+ e0.name_cp_index == e1.name_cp_index &&
+ e0.slot == e1.slot);
+ }
+
+ static unsigned int hash(LocalVariableTableElement const& e0) {
+ unsigned int raw_hash = e0.start_bci;
+
+ raw_hash = e0.length + raw_hash * 37;
+ raw_hash = e0.name_cp_index + raw_hash * 37;
+ raw_hash = e0.slot + raw_hash * 37;
+
+ return raw_hash;
+ }
+};
+
+
+// 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;
+};
+
+static void copy_lvt_element(const Classfile_LVT_Element* const src,
+ LocalVariableTableElement* const 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)
+const ClassFileParser::unsafe_u2* ClassFileParser::parse_localvariable_table(const ClassFileStream* cfs,
+ u4 code_length,
+ u2 max_locals,
+ u4 code_attribute_length,
+ u2* const localvariable_table_length,
+ bool isLVTT,
+ TRAPS) {
+ const char* const tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable";
+ *localvariable_table_length = cfs->get_u2(CHECK_NULL);
+ const unsigned int size =
+ (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2);
+
+ const ConstantPool* const cp = _cp;
+
+ // 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);
+ }
+
+ const unsafe_u2* const localvariable_table_start = cfs->current();
+ 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++) {
+ const u2 start_pc = cfs->get_u2_fast();
+ const u2 length = cfs->get_u2_fast();
+ const u2 name_index = cfs->get_u2_fast();
+ const u2 descriptor_index = cfs->get_u2_fast();
+ const u2 index = cfs->get_u2_fast();
+ // Assign to a u4 to avoid overflow
+ const 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);
+ }
+ const 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);
+
+ const Symbol* const name = cp->symbol_at(name_index);
+ const Symbol* const 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* const u1_index,
+ u4* const u2_index,
+ u1* const u1_array,
+ u2* const u2_array,
+ TRAPS) {
+ const ClassFileStream* const 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++) {
+ const u1 tag = u1_array[i1++] = cfs->get_u1(CHECK);
+ index++;
+ if (tag == ITEM_Long || tag == ITEM_Double) {
+ index++;
+ } else if (tag == ITEM_Object) {
+ const 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) {
+ const 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;
+}
+
+static const u1* parse_stackmap_table(const ClassFileStream* const cfs,
+ u4 code_attribute_length,
+ bool need_verify,
+ TRAPS) {
+ assert(cfs != NULL, "invariant");
+
+ if (0 == code_attribute_length) {
+ return NULL;
+ }
+
+ const u1* const stackmap_table_start = cfs->current();
+ assert(stackmap_table_start != NULL, "null stackmap table");
+
+ // check code_attribute_length first
+ cfs->skip_u1(code_attribute_length, CHECK_NULL);
+
+ if (!need_verify && !DumpSharedSpaces) {
+ return NULL;
+ }
+ return stackmap_table_start;
+}
+
+const ClassFileParser::unsafe_u2* ClassFileParser::parse_checked_exceptions(const ClassFileStream* const cfs,
+ u2* const checked_exceptions_length,
+ u4 method_attribute_length,
+ TRAPS) {
+ assert(cfs != NULL, "invariant");
+ assert(checked_exceptions_length != NULL, "invariant");
+
+ cfs->guarantee_more(2, CHECK_NULL); // checked_exceptions_length
+ *checked_exceptions_length = cfs->get_u2_fast();
+ const unsigned int size =
+ (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2);
+ const unsafe_u2* const checked_exceptions_start = cfs->current();
+ 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;
+ const 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,
+ const Symbol* name,
+ const Symbol* sig,
+ TRAPS) const {
+ assert(name != NULL, "invariant");
+ assert(sig != NULL, "invariant");
+
+ 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());
+}
+
+AnnotationCollector::ID
+AnnotationCollector::annotation_index(const ClassLoaderData* loader_data,
+ const Symbol* name) {
+ const 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_platform_class_loader_data() ||
+ loader_data->is_anonymous();
+ switch (sid) {
+ case vmSymbols::VM_SYMBOL_ENUM_NAME(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(jdk_internal_vm_annotation_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(jdk_internal_vm_annotation_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_InjectedProfile_signature): {
+ if (_location != _in_method) break; // only allow for methods
+ if (!privileged) break; // only allow in privileged code
+ return _method_InjectedProfile;
+ }
+ 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(jdk_internal_HotSpotIntrinsicCandidate_signature): {
+ if (_location != _in_method) break; // only allow for methods
+ if (!privileged) break; // only allow in privileged code
+ return _method_HotSpotIntrinsicCandidate;
+ }
+ case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_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(jdk_internal_vm_annotation_Contended_signature): {
+ if (_location != _in_field && _location != _in_class) {
+ break; // only allow for fields and classes
+ }
+ if (!EnableContended || (RestrictContended && !privileged)) {
+ break; // honor privileges
+ }
+ return _jdk_internal_vm_annotation_Contended;
+ }
+ case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_internal_vm_annotation_ReservedStackAccess_signature): {
+ if (_location != _in_method) break; // only allow for methods
+ if (RestrictReservedStack && !privileged) break; // honor privileges
+ return _jdk_internal_vm_annotation_ReservedStackAccess;
+ }
+ 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 MethodAnnotationCollector::apply_to(const 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_InjectedProfile))
+ m->set_has_injected_profile(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);
+ if (has_annotation(_method_HotSpotIntrinsicCandidate) && !m->is_synthetic())
+ m->set_intrinsic_candidate(true);
+ if (has_annotation(_jdk_internal_vm_annotation_ReservedStackAccess))
+ m->set_has_reserved_stack_access(true);
+}
+
+void ClassFileParser::ClassAnnotationCollector::apply_to(InstanceKlass* ik) {
+ assert(ik != NULL, "invariant");
+ ik->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(const ConstMethod* cm,
+ int lvt_cnt,
+ u2* const localvariable_table_length,
+ const unsafe_u2** const localvariable_table_start,
+ int lvtt_cnt,
+ u2* const localvariable_type_table_length,
+ const unsafe_u2** const localvariable_type_table_start,
+ TRAPS) {
+
+ ResourceMark rm(THREAD);
+
+ typedef ResourceHashtable<LocalVariableTableElement, LocalVariableTableElement*,
+ &LVT_Hash::hash, &LVT_Hash::equals> LVT_HashTable;
+
+ LVT_HashTable* const table = new LVT_HashTable();
+
+ // To fill LocalVariableTable in
+ const 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.
+ if (table->put(*lvt, lvt) == false
+ && _need_verify
+ && _major_version >= JAVA_1_5_VERSION) {
+ 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
+ const 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);
+ LocalVariableTableElement** entry = table->get(lvtt_elem);
+ if (entry == NULL) {
+ if (_need_verify) {
+ 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)->signature_cp_index != 0 && _need_verify) {
+ 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)->signature_cp_index = lvtt_elem.descriptor_cp_index;
+ }
+ }
+ }
+}
+
+
+void ClassFileParser::copy_method_annotations(ConstMethod* cm,
+ const u1* runtime_visible_annotations,
+ int runtime_visible_annotations_length,
+ const u1* runtime_invisible_annotations,
+ int runtime_invisible_annotations_length,
+ const u1* runtime_visible_parameter_annotations,
+ int runtime_visible_parameter_annotations_length,
+ const u1* runtime_invisible_parameter_annotations,
+ int runtime_invisible_parameter_annotations_length,
+ const u1* runtime_visible_type_annotations,
+ int runtime_visible_type_annotations_length,
+ const u1* runtime_invisible_type_annotations,
+ int runtime_invisible_type_annotations_length,
+ const 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.
+
+Method* ClassFileParser::parse_method(const ClassFileStream* const cfs,
+ bool is_interface,
+ const ConstantPool* cp,
+ AccessFlags* const promoted_flags,
+ TRAPS) {
+ assert(cfs != NULL, "invariant");
+ assert(cp != NULL, "invariant");
+ assert(promoted_flags != NULL, "invariant");
+
+ ResourceMark rm(THREAD);
+ // Parse fixed parts:
+ // access_flags, name_index, descriptor_index, attributes_count
+ cfs->guarantee_more(8, CHECK_NULL);
+
+ int flags = cfs->get_u2_fast();
+ const u2 name_index = cfs->get_u2_fast();
+ const 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_NULL);
+ const Symbol* const name = cp->symbol_at(name_index);
+ verify_legal_method_name(name, CHECK_NULL);
+
+ const 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_NULL);
+ const Symbol* const signature = cp->symbol_at(signature_index);
+
+ 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 {
+ classfile_parse_error("Method <clinit> is not static in class file %s", CHECK_NULL);
+ }
+ } else {
+ verify_legal_method_modifiers(flags, is_interface, name, CHECK_NULL);
+ }
+
+ if (name == vmSymbols::object_initializer_name() && is_interface) {
+ classfile_parse_error("Interface cannot have a method named <init>, class file %s", CHECK_NULL);
+ }
+
+ 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_NULL);
+ if (args_size > MAX_ARGS_SIZE) {
+ classfile_parse_error("Too many arguments in method signature in class file %s", CHECK_NULL);
+ }
+ }
+
+ AccessFlags access_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;
+ const u1* code_start = 0;
+ u2 exception_table_length = 0;
+ const unsafe_u2* exception_table_start = NULL; // (potentially unaligned) pointer to array of u2 elements
+ Array<int>* exception_handlers = Universe::the_empty_int_array();
+ u2 checked_exceptions_length = 0;
+ const unsafe_u2* checked_exceptions_start = NULL; // (potentially unaligned) pointer to array of u2 elements
+ 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 = NULL;
+ const unsafe_u2** localvariable_table_start = NULL; // (potentially unaligned) pointer to array of LVT attributes
+ u2* localvariable_type_table_length = NULL;
+ const unsafe_u2** localvariable_type_table_start = NULL; // (potentially unaligned) pointer to LVTT attributes
+ int method_parameters_length = -1;
+ const 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
+ const u1* stackmap_data = NULL;
+ int stackmap_data_length = 0;
+ u2 generic_signature_index = 0;
+ MethodAnnotationCollector parsed_annotations;
+ const u1* runtime_visible_annotations = NULL;
+ int runtime_visible_annotations_length = 0;
+ const u1* runtime_invisible_annotations = NULL;
+ int runtime_invisible_annotations_length = 0;
+ const u1* runtime_visible_parameter_annotations = NULL;
+ int runtime_visible_parameter_annotations_length = 0;
+ const u1* runtime_invisible_parameter_annotations = NULL;
+ int runtime_invisible_parameter_annotations_length = 0;
+ const u1* runtime_visible_type_annotations = NULL;
+ int runtime_visible_type_annotations_length = 0;
+ const 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;
+ const 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_NULL); // method_attribute_name_index, method_attribute_length
+ const u2 method_attribute_name_index = cfs->get_u2_fast();
+ const 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_NULL);
+
+ const Symbol* const 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_NULL);
+ }
+ if (parsed_code_attribute) {
+ classfile_parse_error("Multiple Code attributes in class file %s",
+ CHECK_NULL);
+ }
+ parsed_code_attribute = true;
+
+ // Stack size, locals size, and code size
+ if (_major_version == 45 && _minor_version <= 2) {
+ cfs->guarantee_more(4, CHECK_NULL);
+ max_stack = cfs->get_u1_fast();
+ max_locals = cfs->get_u1_fast();
+ code_length = cfs->get_u2_fast();
+ } else {
+ cfs->guarantee_more(8, CHECK_NULL);
+ 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_NULL);
+ guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE,
+ "Invalid method Code length %u in class file %s",
+ code_length, CHECK_NULL);
+ }
+ // Code pointer
+ code_start = cfs->current();
+ assert(code_start != NULL, "null code start");
+ cfs->guarantee_more(code_length, CHECK_NULL);
+ cfs->skip_u1_fast(code_length);
+
+ // Exception handler table
+ cfs->guarantee_more(2, CHECK_NULL); // exception_table_length
+ exception_table_length = cfs->get_u2_fast();
+ if (exception_table_length > 0) {
+ exception_table_start = parse_exception_table(cfs,
+ code_length,
+ exception_table_length,
+ CHECK_NULL);
+ }
+
+ // Parse additional attributes in code attribute
+ cfs->guarantee_more(2, CHECK_NULL); // 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_NULL); // code_attribute_name_index, code_attribute_length
+ const u2 code_attribute_name_index = cfs->get_u2_fast();
+ const 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_NULL);
+ 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_NULL);
+
+ } 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, const unsafe_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, const unsafe_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(const unsafe_u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt);
+ }
+ localvariable_table_start[lvt_cnt] =
+ parse_localvariable_table(cfs,
+ code_length,
+ max_locals,
+ code_attribute_length,
+ &localvariable_table_length[lvt_cnt],
+ false, // is not LVTT
+ CHECK_NULL);
+ 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, const unsafe_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, const unsafe_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(const unsafe_u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt);
+ }
+ localvariable_type_table_start[lvtt_cnt] =
+ parse_localvariable_table(cfs,
+ code_length,
+ max_locals,
+ code_attribute_length,
+ &localvariable_type_table_length[lvtt_cnt],
+ true, // is LVTT
+ CHECK_NULL);
+ 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_NULL);
+ }
+ stackmap_data = parse_stackmap_table(cfs, code_attribute_length, _need_verify, CHECK_NULL);
+ stackmap_data_length = code_attribute_length;
+ parsed_stackmap_attribute = true;
+ } else {
+ // Skip unknown attributes
+ cfs->skip_u1(code_attribute_length, CHECK_NULL);
+ }
+ }
+ // 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_NULL);
+ }
+ } 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_NULL);
+ }
+ parsed_checked_exceptions_attribute = true;
+ checked_exceptions_start =
+ parse_checked_exceptions(cfs,
+ &checked_exceptions_length,
+ method_attribute_length,
+ CHECK_NULL);
+ } 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_NULL);
+ }
+ method_parameters_seen = true;
+ method_parameters_length = cfs->get_u1_fast();
+ const u2 real_length = (method_parameters_length * 4u) + 1u;
+ if (method_attribute_length != real_length) {
+ classfile_parse_error(
+ "Invalid MethodParameters method attribute length %u in class file",
+ method_attribute_length, CHECK_NULL);
+ }
+ method_parameters_data = cfs->current();
+ 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 = -1;
+ } 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_NULL);
+ }
+ // 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_NULL);
+ }
+ } else if (_major_version >= JAVA_1_5_VERSION) {
+ if (method_attribute_name == vmSymbols::tag_signature()) {
+ if (generic_signature_index != 0) {
+ classfile_parse_error(
+ "Multiple Signature attributes for method in class file %s",
+ CHECK_NULL);
+ }
+ if (method_attribute_length != 2) {
+ classfile_parse_error(
+ "Invalid Signature attribute length %u in class file %s",
+ method_attribute_length, CHECK_NULL);
+ }
+ generic_signature_index = parse_generic_signature_attribute(cfs, CHECK_NULL);
+ } 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_NULL);
+ }
+ runtime_visible_annotations_length = method_attribute_length;
+ runtime_visible_annotations = cfs->current();
+ assert(runtime_visible_annotations != NULL, "null visible annotations");
+ cfs->guarantee_more(runtime_visible_annotations_length, CHECK_NULL);
+ parse_annotations(cp,
+ runtime_visible_annotations,
+ runtime_visible_annotations_length,
+ &parsed_annotations,
+ _loader_data,
+ CHECK_NULL);
+ cfs->skip_u1_fast(runtime_visible_annotations_length);
+ } 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_NULL);
+ }
+ runtime_invisible_annotations_exists = true;
+ if (PreserveAllAnnotations) {
+ runtime_invisible_annotations_length = method_attribute_length;
+ runtime_invisible_annotations = cfs->current();
+ assert(runtime_invisible_annotations != NULL, "null invisible annotations");
+ }
+ cfs->skip_u1(method_attribute_length, CHECK_NULL);
+ } 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_NULL);
+ }
+ runtime_visible_parameter_annotations_length = method_attribute_length;
+ runtime_visible_parameter_annotations = cfs->current();
+ assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations");
+ cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_NULL);
+ } 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_NULL);
+ }
+ runtime_invisible_parameter_annotations_exists = true;
+ if (PreserveAllAnnotations) {
+ runtime_invisible_parameter_annotations_length = method_attribute_length;
+ runtime_invisible_parameter_annotations = cfs->current();
+ assert(runtime_invisible_parameter_annotations != NULL,
+ "null invisible parameter annotations");
+ }
+ cfs->skip_u1(method_attribute_length, CHECK_NULL);
+ } 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_NULL);
+ }
+ annotation_default_length = method_attribute_length;
+ annotation_default = cfs->current();
+ assert(annotation_default != NULL, "null annotation default");
+ cfs->skip_u1(annotation_default_length, CHECK_NULL);
+ } 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_NULL);
+ }
+ runtime_visible_type_annotations_length = method_attribute_length;
+ runtime_visible_type_annotations = cfs->current();
+ 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_NULL);
+ } 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_NULL);
+ } else {
+ runtime_invisible_type_annotations_exists = true;
+ }
+ if (PreserveAllAnnotations) {
+ runtime_invisible_type_annotations_length = method_attribute_length;
+ runtime_invisible_type_annotations = cfs->current();
+ assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations");
+ }
+ cfs->skip_u1(method_attribute_length, CHECK_NULL);
+ } else {
+ // Skip unknown attributes
+ cfs->skip_u1(method_attribute_length, CHECK_NULL);
+ }
+ } else {
+ // Skip unknown attributes
+ cfs->skip_u1(method_attribute_length, CHECK_NULL);
+ }
+ }
+
+ 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_NULL);
+ }
+
+ // 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* const m = Method::allocate(_loader_data,
+ code_length,
+ access_flags,
+ &sizes,
+ ConstMethod::NORMAL,
+ CHECK_NULL);
+
+ ClassLoadingService::add_class_method_size(m->size()*wordSize);
+
+ // 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);
+
+ ResultTypeFinder rtf(cp->symbol_at(signature_index));
+ m->constMethod()->set_result_type(rtf.type());
+
+ 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,
+ (u1*)stackmap_data,
+ stackmap_data_length,
+ CHECK_NULL);
+ }
+
+ // Copy byte codes
+ m->set_code((u1*)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) {
+ Copy::conjoint_swap_if_needed<Endian::JAVA>(exception_table_start,
+ m->exception_table_start(),
+ exception_table_length * sizeof(ExceptionTableElement),
+ sizeof(u2));
+ }
+
+ // 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((address)method_parameters_data);
+ method_parameters_data += 2;
+ elem[i].flags = Bytes::get_Java_u2((address)method_parameters_data);
+ method_parameters_data += 2;
+ }
+ }
+
+ // Copy checked exceptions
+ if (checked_exceptions_length > 0) {
+ Copy::conjoint_swap_if_needed<Endian::JAVA>(checked_exceptions_start,
+ m->checked_exceptions_start(),
+ checked_exceptions_length * sizeof(CheckedExceptionElement),
+ sizeof(u2));
+ }
+
+ // 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.
+// Side-effects: populates the _methods field in the parser
+void ClassFileParser::parse_methods(const ClassFileStream* const cfs,
+ bool is_interface,
+ AccessFlags* promoted_flags,
+ bool* has_final_method,
+ bool* declares_nonstatic_concrete_methods,
+ TRAPS) {
+ assert(cfs != NULL, "invariant");
+ assert(promoted_flags != NULL, "invariant");
+ assert(has_final_method != NULL, "invariant");
+ assert(declares_nonstatic_concrete_methods != NULL, "invariant");
+
+ assert(NULL == _methods, "invariant");
+
+ cfs->guarantee_more(2, CHECK); // length
+ const 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);
+
+ for (int index = 0; index < length; index++) {
+ Method* method = parse_method(cfs,
+ is_interface,
+ _cp,
+ promoted_flags,
+ CHECK);
+
+ if (method->is_final()) {
+ *has_final_method = true;
+ }
+ // declares_nonstatic_concrete_methods: declares concrete instance methods, any access flags
+ // used for interface initialization, and default method inheritance analysis
+ if (is_interface && !(*declares_nonstatic_concrete_methods)
+ && !method->is_abstract() && !method->is_static()) {
+ *declares_nonstatic_concrete_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;
+ const Symbol* name = NULL;
+ const Symbol* sig = NULL;
+ {
+ debug_only(NoSafepointVerifier nsv;)
+ for (int i = 0; i < length; i++) {
+ const Method* const m = _methods->at(i);
+ name = m->name();
+ sig = m->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 method name \"%s\" with signature \"%s\" in class file %s",
+ name->as_C_string(), sig->as_klass_external_name(), CHECK);
+ }
+ }
+ }
+}
+
+static const intArray* sort_methods(Array<Method*>* methods) {
+ const 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* const 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, length, -1);
+ for (int index = 0; index < length; index++) {
+ Method* const m = methods->at(index);
+ const 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(const ClassFileStream* const cfs,
+ TRAPS) {
+ assert(cfs != NULL, "invariant");
+
+ cfs->guarantee_more(2, CHECK_0); // generic_signature_index
+ const 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(const ClassFileStream* const cfs,
+ TRAPS) {
+
+ assert(cfs != NULL, "invariant");
+
+ cfs->guarantee_more(2, CHECK); // sourcefile_index
+ const 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(const ClassFileStream* const cfs,
+ int length,
+ TRAPS) {
+ assert(cfs != NULL, "invariant");
+
+ const u1* const sde_buffer = cfs->current();
+ 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* const 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((const 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(const ClassFileStream* const cfs,
+ const u1* const inner_classes_attribute_start,
+ bool parsed_enclosingmethod_attribute,
+ u2 enclosing_method_class_index,
+ u2 enclosing_method_method_index,
+ TRAPS) {
+ const u1* const 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]
+ const int size = length * 4 + (parsed_enclosingmethod_attribute ? 2 : 0);
+ Array<u2>* const inner_classes = MetadataFactory::new_array<u2>(_loader_data, size, CHECK_0);
+ _inner_classes = inner_classes;
+
+ int index = 0;
+ const 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
+ const u2 inner_class_info_index = cfs->get_u2_fast();
+ check_property(
+ 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
+ const 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
+ const 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
+ jint flags;
+ // JVM_ACC_MODULE is defined in JDK-9 and later.
+ if (_major_version >= JAVA_9_VERSION) {
+ flags = cfs->get_u2_fast() & (RECOGNIZED_INNER_CLASS_MODIFIERS | JVM_ACC_MODULE);
+ } else {
+ 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);
+ AccessFlags inner_access_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(const ClassFileStream* const cfs, TRAPS) {
+ assert(cfs != NULL, "invariant");
+
+ const 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(const ClassFileStream* const cfs,
+ ConstantPool* cp,
+ u4 attribute_byte_length,
+ TRAPS) {
+ assert(cfs != NULL, "invariant");
+ assert(cp != NULL, "invariant");
+
+ const u1* const 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);
+
+ const 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}}
+ const 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.
+ const int index_size = (attribute_array_length * 2);
+
+ Array<u2>* const 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;
+ const 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
+ const u2 bootstrap_method_index = cfs->get_u2_fast();
+ const 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++) {
+ const 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);
+ }
+ }
+ guarantee_property(current_start + attribute_byte_length == cfs->current(),
+ "Bad length on BootstrapMethods in class file %s",
+ CHECK);
+}
+
+void ClassFileParser::parse_classfile_attributes(const ClassFileStream* const cfs,
+ ConstantPool* cp,
+ ClassFileParser::ClassAnnotationCollector* parsed_annotations,
+ TRAPS) {
+ assert(cfs != NULL, "invariant");
+ assert(cp != NULL, "invariant");
+ assert(parsed_annotations != NULL, "invariant");
+
+ // 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;
+ const u1* runtime_visible_annotations = NULL;
+ int runtime_visible_annotations_length = 0;
+ const u1* runtime_invisible_annotations = NULL;
+ int runtime_invisible_annotations_length = 0;
+ const u1* runtime_visible_type_annotations = NULL;
+ int runtime_visible_type_annotations_length = 0;
+ const 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;
+ const 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
+ const u2 attribute_name_index = cfs->get_u2_fast();
+ const 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);
+ const Symbol* const 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(cfs, 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(cfs, (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->current();
+ 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 (_generic_signature_index != 0) {
+ classfile_parse_error(
+ "Multiple Signature attributes in class file %s", CHECK);
+ }
+ if (attribute_length != 2) {
+ classfile_parse_error(
+ "Wrong Signature attribute length %u in class file %s",
+ attribute_length, CHECK);
+ }
+ parse_classfile_signature_attribute(cfs, 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->current();
+ assert(runtime_visible_annotations != NULL, "null visible annotations");
+ cfs->guarantee_more(runtime_visible_annotations_length, CHECK);
+ parse_annotations(cp,
+ runtime_visible_annotations,
+ runtime_visible_annotations_length,
+ parsed_annotations,
+ _loader_data,
+ CHECK);
+ cfs->skip_u1_fast(runtime_visible_annotations_length);
+ } 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->current();
+ 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(cfs, cp, 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->current();
+ 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->current();
+ 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) {
+ const u2 num_of_classes = parse_classfile_inner_classes_attribute(
+ cfs,
+ 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(InstanceKlass* k) {
+ assert(k != NULL, "invariant");
+
+ 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);
+ }
+}
+
+// Create the Annotations object that will
+// hold the annotations array for the Klass.
+void ClassFileParser::create_combined_annotations(TRAPS) {
+ if (_annotations == NULL &&
+ _type_annotations == NULL &&
+ _fields_annotations == NULL &&
+ _fields_type_annotations == NULL) {
+ // Don't create the Annotations object unnecessarily.
+ return;
+ }
+
+ Annotations* const 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 is the Annotations object that will be
+ // assigned to InstanceKlass being constructed.
+ _combined_annotations = annotations;
+
+ // The annotations arrays below has been transfered the
+ // _combined_annotations so these fields can now be cleared.
+ _annotations = NULL;
+ _type_annotations = NULL;
+ _fields_annotations = NULL;
+ _fields_type_annotations = NULL;
+}
+
+// Transfer ownership of metadata allocated to the InstanceKlass.
+void ClassFileParser::apply_parsed_class_metadata(
+ InstanceKlass* this_klass,
+ int java_fields_count, TRAPS) {
+ assert(this_klass != NULL, "invariant");
+
+ _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);
+ this_klass->set_annotations(_combined_annotations);
+
+ // Clear out these fields so they don't get deallocated by the destructor
+ clear_class_metadata();
+}
+
+AnnotationArray* ClassFileParser::assemble_annotations(const u1* const runtime_visible_annotations,
+ int runtime_visible_annotations_length,
+ const u1* const 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;
+}
+
+const InstanceKlass* ClassFileParser::parse_super_class(ConstantPool* const cp,
+ const int super_class_index,
+ const bool need_verify,
+ TRAPS) {
+ assert(cp != NULL, "invariant");
+ const InstanceKlass* super_klass = NULL;
+
+ 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 = InstanceKlass::cast(cp->resolved_klass_at(super_class_index));
+ if (need_verify)
+ is_array = super_klass->is_array_klass();
+ } 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;
+}
+
+static unsigned int compute_oop_map_count(const InstanceKlass* super,
+ unsigned int nonstatic_oop_map_count,
+ int first_nonstatic_oop_offset) {
+
+ unsigned int map_count =
+ NULL == super ? 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
+ const OopMapBlock* const first_map = super->start_of_nonstatic_oop_maps();
+ const OopMapBlock* const last_map = first_map + map_count - 1;
+
+ const 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;
+}
+
+#ifndef PRODUCT
+static void print_field_layout(const Symbol* name,
+ Array<u2>* fields,
+ const constantPoolHandle& cp,
+ int instance_size,
+ int instance_fields_start,
+ int instance_fields_end,
+ int static_fields_end) {
+
+ assert(name != NULL, "invariant");
+
+ 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");
+}
+#endif
+
+// Values needed for oopmap and InstanceKlass creation
+class ClassFileParser::FieldLayoutInfo : public ResourceObj {
+ 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(ConstantPool* cp,
+ const FieldAllocationCount* fac,
+ const ClassAnnotationCollector* parsed_annotations,
+ FieldLayoutInfo* info,
+ TRAPS) {
+
+ assert(cp != NULL, "invariant");
+
+ // Field size and offset computation
+ int nonstatic_field_size = _super_klass == NULL ? 0 :
+ _super_klass->nonstatic_field_size();
+
+ // 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
+ int next_static_oop_offset = InstanceMirrorKlass::offset_of_static_fields();
+ int 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_up(next_static_double_offset, BytesPerLong);
+ }
+
+ int next_static_word_offset = next_static_double_offset +
+ ((fac->count[STATIC_DOUBLE]) * BytesPerLong);
+ int next_static_short_offset = next_static_word_offset +
+ ((fac->count[STATIC_WORD]) * BytesPerInt);
+ int 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;
+
+ int next_nonstatic_field_offset = nonstatic_fields_start;
+
+ const 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];
+
+ const bool super_has_nonstatic_fields =
+ (_super_klass != NULL && _super_klass->has_nonstatic_fields());
+ const 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.
+ unsigned int nonstatic_oop_map_count = 0;
+ unsigned int max_nonstatic_oop_maps = fac->count[NONSTATIC_OOP] + 1;
+
+ int* nonstatic_oop_offsets = NEW_RESOURCE_ARRAY_IN_THREAD(
+ THREAD, int, max_nonstatic_oop_maps);
+ unsigned int* const nonstatic_oop_counts = NEW_RESOURCE_ARRAY_IN_THREAD(
+ THREAD, unsigned int, max_nonstatic_oop_maps);
+
+ int 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 ) && _loader_data->class_loader() == 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
+ }
+
+ int next_nonstatic_oop_offset = 0;
+ int next_nonstatic_double_offset = 0;
+
+ // 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 ) {
+ const unsigned int map_count = _super_klass->nonstatic_oop_map_count();
+ const OopMapBlock* const first_map = _super_klass->start_of_nonstatic_oop_maps();
+ const OopMapBlock* const last_map = first_map + map_count - 1;
+ const 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 = 0;
+ int nonstatic_word_space_offset = 0;
+ int nonstatic_short_space_offset = 0;
+ int nonstatic_byte_space_offset = 0;
+
+ // 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_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;
+ }
+ }
+ }
+
+ int next_nonstatic_word_offset = next_nonstatic_double_offset +
+ (nonstatic_double_count * BytesPerLong);
+ int next_nonstatic_short_offset = next_nonstatic_word_offset +
+ (nonstatic_word_count * BytesPerInt);
+ int next_nonstatic_byte_offset = next_nonstatic_short_offset +
+ (nonstatic_short_count * BytesPerShort);
+ int 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_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 = 0;
+ const FieldAllocationType atype = (const 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;
+ }
+
+ // Record this oop in the 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 ) {
+ // This oop is adjacent to the previous one, add to 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 {
+ // This oop is not adjacent to the previous one, 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
+ ResourceBitMap 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 = 0;
+ FieldAllocationType atype = (FieldAllocationType) fs.allocation_type();
+
+ switch (atype) {
+ case NONSTATIC_BYTE:
+ next_nonstatic_padded_offset = align_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_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_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_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_up(next_nonstatic_padded_offset, heapOopSize);
+ real_offset = next_nonstatic_padded_offset;
+ next_nonstatic_padded_offset += heapOopSize;
+
+ // Record this oop in the 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 ) {
+ // This oop is adjacent to the previous one, add to 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 {
+ // This oop is not adjacent to the previous one, 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_up(notaligned_nonstatic_fields_end, heapOopSize);
+ int instance_end = align_up(notaligned_nonstatic_fields_end, wordSize);
+ int static_fields_end = align_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_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;
+}
+
+static void fill_oop_maps(const InstanceKlass* k,
+ unsigned int nonstatic_oop_map_count,
+ const int* nonstatic_oop_offsets,
+ const unsigned int* nonstatic_oop_counts) {
+
+ assert(k != NULL, "invariant");
+
+ 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(InstanceKlass* ik) {
+ assert(ik != NULL, "invariant");
+
+ const Klass* const super = ik->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())) {
+ ik->set_has_finalizer();
+ }
+ }
+
+#ifdef ASSERT
+ bool f = false;
+ const Method* const m = ik->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 (!ik->has_redefined_this_or_super()) {
+ assert(ik->has_finalizer() == f, "inconsistent has_finalizer");
+ }
+#endif
+
+ // Check if this klass supports the java.lang.Cloneable interface
+ if (SystemDictionary::Cloneable_klass_loaded()) {
+ if (ik->is_subtype_of(SystemDictionary::Cloneable_klass())) {
+ ik->set_is_cloneable();
+ }
+ }
+
+ // Check if this klass has a vanilla default constructor
+ if (super == NULL) {
+ // java.lang.Object has empty default constructor
+ ik->set_has_vanilla_constructor();
+ } else {
+ if (super->has_vanilla_constructor() &&
+ _has_vanilla_constructor) {
+ ik->set_has_vanilla_constructor();
+ }
+#ifdef ASSERT
+ bool v = false;
+ if (super->has_vanilla_constructor()) {
+ const Method* const constructor =
+ ik->find_method(vmSymbols::object_initializer_name(),
+ vmSymbols::void_method_signature());
+ if (constructor != NULL && constructor->is_vanilla_constructor()) {
+ v = true;
+ }
+ }
+ assert(v == ik->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(ik->size_helper() > 0, "layout_helper is initialized");
+ if ((!RegisterFinalizersAtInit && ik->has_finalizer())
+ || ik->is_abstract() || ik->is_interface()
+ || (ik->name() == vmSymbols::java_lang_Class() && ik->class_loader() == NULL)
+ || ik->size_helper() >= FastAllocateSizeLimit) {
+ // Forbid fast-path allocation.
+ const jint lh = Klass::instance_layout_helper(ik->size_helper(), true);
+ ik->set_layout_helper(lh);
+ }
+}
+
+// Attach super classes and interface classes to class loader data
+static void record_defined_class_dependencies(const InstanceKlass* defined_klass,
+ TRAPS) {
+ assert(defined_klass != NULL, "invariant");
+
+ ClassLoaderData* const 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* const super = defined_klass->super();
+ if (super != NULL) {
+ defining_loader_data->record_dependency(super, CHECK);
+ }
+
+ // add super interface dependencies
+ const Array<Klass*>* const local_interfaces = defined_klass->local_interfaces();
+ if (local_interfaces != NULL) {
+ const 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
+
+static void append_interfaces(GrowableArray<Klass*>* result,
+ const Array<Klass*>* const ifs) {
+ // iterate over new interfaces
+ for (int i = 0; i < ifs->length(); i++) {
+ Klass* const e = ifs->at(i);
+ assert(e->is_klass() && InstanceKlass::cast(e)->is_interface(), "just checking");
+ // add new interface
+ result->append_if_missing(e);
+ }
+}
+
+static Array<Klass*>* compute_transitive_interfaces(const InstanceKlass* super,
+ Array<Klass*>* local_ifs,
+ ClassLoaderData* loader_data,
+ TRAPS) {
+ assert(local_ifs != NULL, "invariant");
+ assert(loader_data != NULL, "invariant");
+
+ // Compute maximum size for transitive interfaces
+ int max_transitive_size = 0;
+ int super_size = 0;
+ // Add superclass transitive interfaces size
+ if (super != NULL) {
+ super_size = super->transitive_interfaces()->length();
+ max_transitive_size += super_size;
+ }
+ // Add local interfaces' super interfaces
+ const int local_size = local_ifs->length();
+ for (int i = 0; i < local_size; i++) {
+ Klass* const 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*>* const result = new GrowableArray<Klass*>(max_transitive_size);
+
+ // Copy down from superclass
+ if (super != NULL) {
+ append_interfaces(result, super->transitive_interfaces());
+ }
+
+ // Copy down from local interfaces' superinterfaces
+ for (int i = 0; i < local_size; i++) {
+ Klass* const 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
+ const int length = result->length();
+ assert(length <= max_transitive_size, "just checking");
+ Array<Klass*>* const new_result =
+ MetadataFactory::new_array<Klass*>(loader_data, length, CHECK_NULL);
+ for (int i = 0; i < length; i++) {
+ Klass* const e = result->at(i);
+ assert(e != NULL, "just checking");
+ new_result->at_put(i, e);
+ }
+ return new_result;
+ }
+}
+
+static void check_super_class_access(const InstanceKlass* this_klass, TRAPS) {
+ assert(this_klass != NULL, "invariant");
+ const Klass* const super = this_klass->super();
+ if (super != NULL) {
+
+ // If the loader is not the boot loader then throw an exception if its
+ // superclass is in package jdk.internal.reflect and its loader is not a
+ // special reflection class loader
+ if (!this_klass->class_loader_data()->is_the_null_class_loader_data()) {
+ assert(super->is_instance_klass(), "super is not instance klass");
+ PackageEntry* super_package = super->package();
+ if (super_package != NULL &&
+ super_package->name()->fast_compare(vmSymbols::jdk_internal_reflect()) == 0 &&
+ !java_lang_ClassLoader::is_reflection_class_loader(this_klass->class_loader())) {
+ ResourceMark rm(THREAD);
+ Exceptions::fthrow(
+ THREAD_AND_LOCATION,
+ vmSymbols::java_lang_IllegalAccessError(),
+ "class %s loaded by %s cannot access jdk/internal/reflect superclass %s",
+ this_klass->external_name(),
+ this_klass->class_loader_data()->loader_name(),
+ super->external_name());
+ return;
+ }
+ }
+
+ Reflection::VerifyClassAccessResults vca_result =
+ Reflection::verify_class_access(this_klass, InstanceKlass::cast(super), false);
+ if (vca_result != Reflection::ACCESS_OK) {
+ ResourceMark rm(THREAD);
+ char* msg = Reflection::verify_class_access_msg(this_klass,
+ InstanceKlass::cast(super),
+ vca_result);
+ if (msg == NULL) {
+ Exceptions::fthrow(
+ THREAD_AND_LOCATION,
+ vmSymbols::java_lang_IllegalAccessError(),
+ "class %s cannot access its superclass %s",
+ this_klass->external_name(),
+ super->external_name());
+ } else {
+ // Add additional message content.
+ Exceptions::fthrow(
+ THREAD_AND_LOCATION,
+ vmSymbols::java_lang_IllegalAccessError(),
+ "superclass access check failed: %s",
+ msg);
+ }
+ }
+ }
+}
+
+
+static void check_super_interface_access(const InstanceKlass* this_klass, TRAPS) {
+ assert(this_klass != NULL, "invariant");
+ const Array<Klass*>* const local_interfaces = this_klass->local_interfaces();
+ const int lng = local_interfaces->length();
+ for (int i = lng - 1; i >= 0; i--) {
+ Klass* const k = local_interfaces->at(i);
+ assert (k != NULL && k->is_interface(), "invalid interface");
+ Reflection::VerifyClassAccessResults vca_result =
+ Reflection::verify_class_access(this_klass, InstanceKlass::cast(k), false);
+ if (vca_result != Reflection::ACCESS_OK) {
+ ResourceMark rm(THREAD);
+ char* msg = Reflection::verify_class_access_msg(this_klass,
+ InstanceKlass::cast(k),
+ vca_result);
+ if (msg == NULL) {
+ Exceptions::fthrow(
+ THREAD_AND_LOCATION,
+ vmSymbols::java_lang_IllegalAccessError(),
+ "class %s cannot access its superinterface %s",
+ this_klass->external_name(),
+ k->external_name());
+ } else {
+ // Add additional message content.
+ Exceptions::fthrow(
+ THREAD_AND_LOCATION,
+ vmSymbols::java_lang_IllegalAccessError(),
+ "superinterface check failed: %s",
+ msg);
+ }
+ }
+ }
+}
+
+
+static void check_final_method_override(const InstanceKlass* this_klass, TRAPS) {
+ assert(this_klass != NULL, "invariant");
+ const Array<Method*>* const methods = this_klass->methods();
+ const 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++) {
+ const Method* const m = methods->at(index);
+
+ // skip private, static, and <init> methods
+ if ((!m->is_private() && !m->is_static()) &&
+ (m->name() != vmSymbols::object_initializer_name())) {
+
+ const Symbol* const name = m->name();
+ const Symbol* const signature = m->signature();
+ const Klass* k = this_klass->super();
+ const 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
+static void check_illegal_static_method(const InstanceKlass* this_klass, TRAPS) {
+ assert(this_klass != NULL, "invariant");
+ assert(this_klass->is_interface(), "not an interface");
+ const Array<Method*>* methods = this_klass->methods();
+ const int num_methods = methods->length();
+
+ for (int index = 0; index < num_methods; index++) {
+ const Method* const 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) const {
+ const bool is_module = (flags & JVM_ACC_MODULE) != 0;
+ assert(_major_version >= JAVA_9_VERSION || !is_module, "JVM_ACC_MODULE should not be set");
+ if (is_module) {
+ ResourceMark rm(THREAD);
+ Exceptions::fthrow(
+ THREAD_AND_LOCATION,
+ vmSymbols::java_lang_NoClassDefFoundError(),
+ "%s is not a class because access_flag ACC_MODULE is set",
+ _class_name->as_C_string());
+ return;
+ }
+
+ 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;
+ }
+}
+
+static bool 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));
+}
+
+static bool is_supported_version(u2 major, u2 minor){
+ const 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) const {
+ 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,
+ const Symbol* name,
+ TRAPS) const {
+ 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_private || is_protected || 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 (has_illegal_visibility(flags)) {
+ is_illegal = true;
+ } else {
+ 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 (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) const {
+ assert(_need_verify, "only called when _need_verify is true");
+ if (!UTF8::is_legal_utf8(buffer, length, _major_version <= 47)) {
+ classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
+ }
+}
+
+// Unqualified names may not contain the characters '.', ';', '[', or '/'.
+// In class names, '/' separates unqualified names. This is verified in this function also.
+// 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.
+//
+// This method is also called from the modular system APIs in modules.cpp
+// to verify the validity of module and package names.
+bool ClassFileParser::verify_unqualified_name(const char* name,
+ unsigned int length,
+ int type) {
+ for (const char* p = name; p != name + length;) {
+ jchar ch = *p;
+ if (ch < 128) {
+ if (ch == '.' || ch == ';' || ch == '[' ) {
+ return false; // do not permit '.', ';', or '['
+ }
+ if (ch == '/') {
+ // check for '//' or leading or trailing '/' which are not legal
+ // unqualified name must not be empty
+ if (type == ClassFileParser::LegalClass) {
+ if (p == name || p+1 >= name+length || *(p+1) == '/') {
+ return false;
+ }
+ } else {
+ return false; // do not permit '/' unless it's class name
+ }
+ }
+ if (type == ClassFileParser::LegalMethod && (ch == '<' || ch == '>')) {
+ return false; // do not permit '<' or '>' in method names
+ }
+ p++;
+ } 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).
+static const char* skip_over_field_name(const char* name,
+ bool slash_ok,
+ unsigned int length) {
+ const char* p;
+ jboolean last_is_slash = false;
+ jboolean not_first_ch = false;
+
+ for (p = name; p != name + length; not_first_ch = true) {
+ const char* old_p = p;
+ jchar 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;
+
+ // 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,
+ SystemDictionary::Character_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,
+ SystemDictionary::Character_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.
+const char* ClassFileParser::skip_over_field_signature(const char* signature,
+ bool void_ok,
+ unsigned int length,
+ TRAPS) const {
+ 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
+ const char* const 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 {
+ // Skip leading 'L' and ignore first appearance of ';'
+ length--;
+ signature++;
+ char* c = strchr((char*) signature, ';');
+ // Format check signature
+ if (c != NULL) {
+ ResourceMark rm(THREAD);
+ int newlen = c - (char*) signature;
+ char* sig = NEW_RESOURCE_ARRAY(char, newlen + 1);
+ strncpy(sig, signature, newlen);
+ sig[newlen] = '\0';
+
+ bool legal = verify_unqualified_name(sig, newlen, LegalClass);
+ if (!legal) {
+ classfile_parse_error("Class name contains illegal character "
+ "in descriptor in class file %s",
+ CHECK_0);
+ return NULL;
+ }
+ return signature + newlen + 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;
+}
+
+// Checks if name is a legal class name.
+void ClassFileParser::verify_legal_class_name(const Symbol* name, TRAPS) const {
+ 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) {
+ const 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);
+ assert(_class_name != NULL, "invariant");
+ 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(const Symbol* name, TRAPS) const {
+ 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] != '<') {
+ const 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);
+ assert(_class_name != NULL, "invariant");
+ 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(const Symbol* name, TRAPS) const {
+ 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) {
+ const 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);
+ assert(_class_name != NULL, "invariant");
+ 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(const Symbol* name,
+ const Symbol* signature,
+ TRAPS) const {
+ if (!_need_verify) { return; }
+
+ char buf[fixed_buffer_size];
+ const char* const bytes = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
+ const unsigned int length = signature->utf8_length();
+ const char* const 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(const Symbol* name,
+ const Symbol* signature,
+ TRAPS) const {
+ 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;
+ }
+
+ // Class initializers cannot have args for class format version >= 51.
+ if (name == vmSymbols::class_initializer_name() &&
+ signature != vmSymbols::void_method_signature() &&
+ _major_version >= JAVA_7_VERSION) {
+ throwIllegalSignature("Method", name, signature, CHECK_0);
+ return 0;
+ }
+
+ unsigned int args_size = 0;
+ char buf[fixed_buffer_size];
+ const char* p = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
+ unsigned int length = signature->utf8_length();
+ const 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;
+}
+
+int ClassFileParser::static_field_size() const {
+ assert(_field_info != NULL, "invariant");
+ return _field_info->static_field_size;
+}
+
+int ClassFileParser::total_oop_map_count() const {
+ assert(_field_info != NULL, "invariant");
+ return _field_info->total_oop_map_count;
+}
+
+jint ClassFileParser::layout_size() const {
+ assert(_field_info != NULL, "invariant");
+ return _field_info->instance_size;
+}
+
+static void check_methods_for_intrinsics(const InstanceKlass* ik,
+ const Array<Method*>* methods) {
+ assert(ik != NULL, "invariant");
+ assert(methods != NULL, "invariant");
+
+ // 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.)
+ const vmSymbols::SID klass_id = Method::klass_id_for_intrinsics(ik);
+
+ if (klass_id != vmSymbols::NO_SID) {
+ for (int j = 0; j < methods->length(); ++j) {
+ Method* method = methods->at(j);
+ method->init_intrinsic_id();
+
+ if (CheckIntrinsics) {
+ // Check if an intrinsic is defined for method 'method',
+ // but the method is not annotated with @HotSpotIntrinsicCandidate.
+ if (method->intrinsic_id() != vmIntrinsics::_none &&
+ !method->intrinsic_candidate()) {
+ tty->print("Compiler intrinsic is defined for method [%s], "
+ "but the method is not annotated with @HotSpotIntrinsicCandidate.%s",
+ method->name_and_sig_as_C_string(),
+ NOT_DEBUG(" Method will not be inlined.") DEBUG_ONLY(" Exiting.")
+ );
+ tty->cr();
+ DEBUG_ONLY(vm_exit(1));
+ }
+ // Check is the method 'method' is annotated with @HotSpotIntrinsicCandidate,
+ // but there is no intrinsic available for it.
+ if (method->intrinsic_candidate() &&
+ method->intrinsic_id() == vmIntrinsics::_none) {
+ tty->print("Method [%s] is annotated with @HotSpotIntrinsicCandidate, "
+ "but no compiler intrinsic is defined for the method.%s",
+ method->name_and_sig_as_C_string(),
+ NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
+ );
+ tty->cr();
+ DEBUG_ONLY(vm_exit(1));
+ }
+ }
+ } // end for
+
+#ifdef ASSERT
+ if (CheckIntrinsics) {
+ // Check for orphan methods in the current class. A method m
+ // of a class C is orphan if an intrinsic is defined for method m,
+ // but class C does not declare m.
+ // The check is potentially expensive, therefore it is available
+ // only in debug builds.
+
+ for (int id = vmIntrinsics::FIRST_ID; id < (int)vmIntrinsics::ID_LIMIT; ++id) {
+ if (vmIntrinsics::_compiledLambdaForm == id) {
+ // The _compiledLamdbdaForm intrinsic is a special marker for bytecode
+ // generated for the JVM from a LambdaForm and therefore no method
+ // is defined for it.
+ continue;
+ }
+
+ if (vmIntrinsics::class_for(vmIntrinsics::ID_from(id)) == klass_id) {
+ // Check if the current class contains a method with the same
+ // name, flags, signature.
+ bool match = false;
+ for (int j = 0; j < methods->length(); ++j) {
+ const Method* method = methods->at(j);
+ if (method->intrinsic_id() == id) {
+ match = true;
+ break;
+ }
+ }
+
+ if (!match) {
+ char buf[1000];
+ tty->print("Compiler intrinsic is defined for method [%s], "
+ "but the method is not available in class [%s].%s",
+ vmIntrinsics::short_name_as_C_string(vmIntrinsics::ID_from(id),
+ buf, sizeof(buf)),
+ ik->name()->as_C_string(),
+ NOT_DEBUG("") DEBUG_ONLY(" Exiting.")
+ );
+ tty->cr();
+ DEBUG_ONLY(vm_exit(1));
+ }
+ }
+ } // end for
+ } // CheckIntrinsics
+#endif // ASSERT
+ }
+}
+
+InstanceKlass* ClassFileParser::create_instance_klass(bool changed_by_loadhook, TRAPS) {
+ if (_klass != NULL) {
+ return _klass;
+ }
+
+ InstanceKlass* const ik =
+ InstanceKlass::allocate_instance_klass(*this, CHECK_NULL);
+
+ fill_instance_klass(ik, changed_by_loadhook, CHECK_NULL);
+
+ assert(_klass == ik, "invariant");
+
+ ik->set_has_passed_fingerprint_check(false);
+ if (UseAOT && ik->supers_have_passed_fingerprint_checks()) {
+ uint64_t aot_fp = AOTLoader::get_saved_fingerprint(ik);
+ if (aot_fp != 0 && aot_fp == _stream->compute_fingerprint()) {
+ // This class matches with a class saved in an AOT library
+ ik->set_has_passed_fingerprint_check(true);
+ } else {
+ ResourceMark rm;
+ log_info(class, fingerprint)("%s : expected = " PTR64_FORMAT " actual = " PTR64_FORMAT,
+ ik->external_name(), aot_fp, _stream->compute_fingerprint());
+ }
+ }
+
+ return ik;
+}
+
+void ClassFileParser::fill_instance_klass(InstanceKlass* ik, bool changed_by_loadhook, TRAPS) {
+ assert(ik != NULL, "invariant");
+
+ set_klass_to_deallocate(ik);
+
+ assert(_field_info != NULL, "invariant");
+ assert(ik->static_field_size() == _field_info->static_field_size, "sanity");
+ assert(ik->nonstatic_oop_map_count() == _field_info->total_oop_map_count,
+ "sanity");
+
+ assert(ik->is_instance_klass(), "sanity");
+ assert(ik->size_helper() == _field_info->instance_size, "sanity");
+
+ // Fill in information already parsed
+ ik->set_should_verify_class(_need_verify);
+
+ // Not yet: supers are done below to support the new subtype-checking fields
+ ik->set_class_loader_data(_loader_data);
+ ik->set_nonstatic_field_size(_field_info->nonstatic_field_size);
+ ik->set_has_nonstatic_fields(_field_info->has_nonstatic_fields);
+ assert(_fac != NULL, "invariant");
+ ik->set_static_oop_field_count(_fac->count[STATIC_OOP]);
+
+ // this transfers ownership of a lot of arrays from
+ // the parser onto the InstanceKlass*
+ apply_parsed_class_metadata(ik, _java_fields_count, CHECK);
+
+ // note that is not safe to use the fields in the parser from this point on
+ assert(NULL == _cp, "invariant");
+ assert(NULL == _fields, "invariant");
+ assert(NULL == _methods, "invariant");
+ assert(NULL == _inner_classes, "invariant");
+ assert(NULL == _local_interfaces, "invariant");
+ assert(NULL == _transitive_interfaces, "invariant");
+ assert(NULL == _combined_annotations, "invariant");
+
+ if (_has_final_method) {
+ ik->set_has_final_method();
+ }
+
+ ik->copy_method_ordering(_method_ordering, CHECK);
+ // 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.
+ ik->set_initial_method_idnum(ik->methods()->length());
+
+ ik->set_name(_class_name);
+
+ if (is_anonymous()) {
+ // _this_class_index is a CONSTANT_Class entry that refers to this
+ // anonymous class itself. If this class needs to refer to its own methods or
+ // fields, it would use a CONSTANT_MethodRef, etc, which would reference
+ // _this_class_index. However, because this class is anonymous (it's
+ // not stored in SystemDictionary), _this_class_index cannot be resolved
+ // with ConstantPool::klass_at_impl, which does a SystemDictionary lookup.
+ // Therefore, we must eagerly resolve _this_class_index now.
+ ik->constants()->klass_at_put(_this_class_index, ik);
+ }
+
+ ik->set_minor_version(_minor_version);
+ ik->set_major_version(_major_version);
+ ik->set_has_nonstatic_concrete_methods(_has_nonstatic_concrete_methods);
+ ik->set_declares_nonstatic_concrete_methods(_declares_nonstatic_concrete_methods);
+
+ if (_host_klass != NULL) {
+ assert (ik->is_anonymous(), "should be the same");
+ ik->set_host_klass(_host_klass);
+ }
+
+ // Set PackageEntry for this_klass
+ oop cl = ik->class_loader();
+ Handle clh = Handle(THREAD, java_lang_ClassLoader::non_reflection_class_loader(cl));
+ ClassLoaderData* cld = ClassLoaderData::class_loader_data_or_null(clh());
+ ik->set_package(cld, CHECK);
+
+ const Array<Method*>* const methods = ik->methods();
+ assert(methods != NULL, "invariant");
+ const int methods_len = methods->length();
+
+ check_methods_for_intrinsics(ik, methods);
+
+ // Fill in field values obtained by parse_classfile_attributes
+ if (_parsed_annotations->has_any_annotations()) {
+ _parsed_annotations->apply_to(ik);
+ }
+
+ apply_parsed_class_attributes(ik);
+
+ // Miranda methods
+ if ((_num_miranda_methods > 0) ||
+ // if this class introduced new miranda methods or
+ (_super_klass != NULL && _super_klass->has_miranda_methods())
+ // super class exists and this class inherited miranda methods
+ ) {
+ ik->set_has_miranda_methods(); // then set a flag
+ }
+
+ // Fill in information needed to compute superclasses.
+ ik->initialize_supers(const_cast<InstanceKlass*>(_super_klass), CHECK);
+
+ // Initialize itable offset tables
+ klassItable::setup_itable_offset_table(ik);
+
+ // Compute transitive closure of interfaces this class implements
+ // Do final class setup
+ fill_oop_maps(ik,
+ _field_info->nonstatic_oop_map_count,
+ _field_info->nonstatic_oop_offsets,
+ _field_info->nonstatic_oop_counts);
+
+ // Fill in has_finalizer, has_vanilla_constructor, and layout_helper
+ set_precomputed_flags(ik);
+
+ // check if this class can access its super class
+ check_super_class_access(ik, CHECK);
+
+ // check if this class can access its superinterfaces
+ check_super_interface_access(ik, CHECK);
+
+ // check if this class overrides any final method
+ check_final_method_override(ik, CHECK);
+
+ // reject static interface methods prior to Java 8
+ if (ik->is_interface() && _major_version < JAVA_8_VERSION) {
+ check_illegal_static_method(ik, CHECK);
+ }
+
+ // Obtain this_klass' module entry
+ ModuleEntry* module_entry = ik->module();
+ assert(module_entry != NULL, "module_entry should always be set");
+
+ // Obtain java.lang.Module
+ Handle module_handle(THREAD, module_entry->module());
+
+ // Allocate mirror and initialize static fields
+ // The create_mirror() call will also call compute_modifiers()
+ java_lang_Class::create_mirror(ik,
+ Handle(THREAD, _loader_data->class_loader()),
+ module_handle,
+ _protection_domain,
+ CHECK);
+
+ assert(_all_mirandas != NULL, "invariant");
+
+ // Generate any default methods - default methods are public interface methods
+ // that have a default implementation. This is new with Java 8.
+ if (_has_nonstatic_concrete_methods) {
+ DefaultMethods::generate_default_methods(ik,
+ _all_mirandas,
+ CHECK);
+ }
+
+ // Add read edges to the unnamed modules of the bootstrap and app class loaders.
+ if (changed_by_loadhook && !module_handle.is_null() && module_entry->is_named() &&
+ !module_entry->has_default_read_edges()) {
+ if (!module_entry->set_has_default_read_edges()) {
+ // We won a potential race
+ JvmtiExport::add_default_read_edges(module_handle, THREAD);
+ }
+ }
+
+ // Update the loader_data graph.
+ record_defined_class_dependencies(ik, CHECK);
+
+ ClassLoadingService::notify_class_loaded(ik, false /* not shared class */);
+
+ if (!is_internal()) {
+ if (log_is_enabled(Info, class, load)) {
+ ResourceMark rm;
+ const char* module_name = (module_entry->name() == NULL) ? UNNAMED_MODULE : module_entry->name()->as_C_string();
+ ik->print_class_load_logging(_loader_data, module_name, _stream);
+ }
+
+ if (log_is_enabled(Debug, class, resolve)) {
+ ResourceMark rm;
+ // print out the superclass.
+ const char * from = ik->external_name();
+ if (ik->java_super() != NULL) {
+ log_debug(class, resolve)("%s %s (super)",
+ from,
+ ik->java_super()->external_name());
+ }
+ // print out each of the interface classes referred to by this class.
+ const Array<Klass*>* const local_interfaces = ik->local_interfaces();
+ if (local_interfaces != NULL) {
+ const int length = local_interfaces->length();
+ for (int i = 0; i < length; i++) {
+ const Klass* const k = local_interfaces->at(i);
+ const char * to = k->external_name();
+ log_debug(class, resolve)("%s %s (interface)", from, to);
+ }
+ }
+ }
+ }
+
+ TRACE_INIT_ID(ik);
+
+ // If we reach here, all is well.
+ // Now remove the InstanceKlass* from the _klass_to_deallocate field
+ // in order for it to not be destroyed in the ClassFileParser destructor.
+ set_klass_to_deallocate(NULL);
+
+ // it's official
+ set_klass(ik);
+
+ debug_only(ik->verify();)
+}
+
+// For an anonymous class that is in the unnamed package, move it to its host class's
+// package by prepending its host class's package name to its class name and setting
+// its _class_name field.
+void ClassFileParser::prepend_host_package_name(const InstanceKlass* host_klass, TRAPS) {
+ ResourceMark rm(THREAD);
+ assert(strrchr(_class_name->as_C_string(), '/') == NULL,
+ "Anonymous class should not be in a package");
+ const char* host_pkg_name =
+ ClassLoader::package_from_name(host_klass->name()->as_C_string(), NULL);
+
+ if (host_pkg_name != NULL) {
+ size_t host_pkg_len = strlen(host_pkg_name);
+ int class_name_len = _class_name->utf8_length();
+ char* new_anon_name =
+ NEW_RESOURCE_ARRAY(char, host_pkg_len + 1 + class_name_len);
+ // Copy host package name and trailing /.
+ strncpy(new_anon_name, host_pkg_name, host_pkg_len);
+ new_anon_name[host_pkg_len] = '/';
+ // Append anonymous class name. The anonymous class name can contain odd
+ // characters. So, do a strncpy instead of using sprintf("%s...").
+ strncpy(new_anon_name + host_pkg_len + 1, (char *)_class_name->base(), class_name_len);
+
+ // Create a symbol and update the anonymous class name.
+ _class_name = SymbolTable::new_symbol(new_anon_name,
+ (int)host_pkg_len + 1 + class_name_len,
+ CHECK);
+ }
+}
+
+// If the host class and the anonymous class are in the same package then do
+// nothing. If the anonymous class is in the unnamed package then move it to its
+// host's package. If the classes are in different packages then throw an IAE
+// exception.
+void ClassFileParser::fix_anonymous_class_name(TRAPS) {
+ assert(_host_klass != NULL, "Expected an anonymous class");
+
+ const jbyte* anon_last_slash = UTF8::strrchr(_class_name->base(),
+ _class_name->utf8_length(), '/');
+ if (anon_last_slash == NULL) { // Unnamed package
+ prepend_host_package_name(_host_klass, CHECK);
+ } else {
+ if (!_host_klass->is_same_class_package(_host_klass->class_loader(), _class_name)) {
+ ResourceMark rm(THREAD);
+ THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
+ err_msg("Host class %s and anonymous class %s are in different packages",
+ _host_klass->name()->as_C_string(), _class_name->as_C_string()));
+ }
+ }
+}
+
+static bool relax_format_check_for(ClassLoaderData* loader_data) {
+ bool trusted = (loader_data->is_the_null_class_loader_data() ||
+ SystemDictionary::is_platform_class_loader(loader_data->class_loader()));
+ bool need_verify =
+ // verifyAll
+ (BytecodeVerificationLocal && BytecodeVerificationRemote) ||
+ // verifyRemote
+ (!BytecodeVerificationLocal && BytecodeVerificationRemote && !trusted);
+ return !need_verify;
+}
+
+ClassFileParser::ClassFileParser(ClassFileStream* stream,
+ Symbol* name,
+ ClassLoaderData* loader_data,
+ Handle protection_domain,
+ const InstanceKlass* host_klass,
+ GrowableArray<Handle>* cp_patches,
+ Publicity pub_level,
+ TRAPS) :
+ _stream(stream),
+ _requested_name(name),
+ _loader_data(loader_data),
+ _host_klass(host_klass),
+ _cp_patches(cp_patches),
+ _num_patched_klasses(0),
+ _max_num_patched_klasses(0),
+ _orig_cp_size(0),
+ _first_patched_klass_resolved_index(0),
+ _super_klass(),
+ _cp(NULL),
+ _fields(NULL),
+ _methods(NULL),
+ _inner_classes(NULL),
+ _local_interfaces(NULL),
+ _transitive_interfaces(NULL),
+ _combined_annotations(NULL),
+ _annotations(NULL),
+ _type_annotations(NULL),
+ _fields_annotations(NULL),
+ _fields_type_annotations(NULL),
+ _klass(NULL),
+ _klass_to_deallocate(NULL),
+ _parsed_annotations(NULL),
+ _fac(NULL),
+ _field_info(NULL),
+ _method_ordering(NULL),
+ _all_mirandas(NULL),
+ _vtable_size(0),
+ _itable_size(0),
+ _num_miranda_methods(0),
+ _rt(REF_NONE),
+ _protection_domain(protection_domain),
+ _access_flags(),
+ _pub_level(pub_level),
+ _bad_constant_seen(0),
+ _synthetic_flag(false),
+ _sde_length(false),
+ _sde_buffer(NULL),
+ _sourcefile_index(0),
+ _generic_signature_index(0),
+ _major_version(0),
+ _minor_version(0),
+ _this_class_index(0),
+ _super_class_index(0),
+ _itfs_len(0),
+ _java_fields_count(0),
+ _need_verify(false),
+ _relax_verify(false),
+ _has_nonstatic_concrete_methods(false),
+ _declares_nonstatic_concrete_methods(false),
+ _has_final_method(false),
+ _has_finalizer(false),
+ _has_empty_finalizer(false),
+ _has_vanilla_constructor(false),
+ _max_bootstrap_specifier_index(-1) {
+
+ _class_name = name != NULL ? name : vmSymbols::unknown_class_name();
+
+ assert(THREAD->is_Java_thread(), "invariant");
+ assert(_loader_data != NULL, "invariant");
+ assert(stream != NULL, "invariant");
+ assert(_stream != NULL, "invariant");
+ assert(_stream->buffer() == _stream->current(), "invariant");
+ assert(_class_name != NULL, "invariant");
+ assert(0 == _access_flags.as_int(), "invariant");
+
+ // 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 = (stream->need_verify()) ? BytecodeVerificationRemote :
+ BytecodeVerificationLocal;
+ }
+ else {
+ _need_verify = Verifier::should_verify_for(_loader_data->class_loader(),
+ stream->need_verify());
+ }
+ if (_cp_patches != NULL) {
+ int len = _cp_patches->length();
+ for (int i=0; i<len; i++) {
+ if (has_cp_patch_at(i)) {
+ Handle patch = cp_patch_at(i);
+ if (java_lang_String::is_instance(patch()) || java_lang_Class::is_instance(patch())) {
+ // We need to append the names of the patched classes to the end of the constant pool,
+ // because a patched class may have a Utf8 name that's not already included in the
+ // original constant pool. These class names are used when patch_constant_pool()
+ // calls patch_class().
+ //
+ // Note that a String in cp_patch_at(i) may be used to patch a Utf8, a String, or a Class.
+ // At this point, we don't know the tag for index i yet, because we haven't parsed the
+ // constant pool. So we can only assume the worst -- every String is used to patch a Class.
+ _max_num_patched_klasses++;
+ }
+ }
+ }
+ }
+
+ // synch back verification state to stream
+ stream->set_verify(_need_verify);
+
+ // 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 = relax_format_check_for(_loader_data);
+
+ parse_stream(stream, CHECK);
+
+ post_process_parsed_stream(stream, _cp, CHECK);
+}
+
+void ClassFileParser::clear_class_metadata() {
+ // metadata created before the instance klass is created. Must be
+ // deallocated if classfile parsing returns an error.
+ _cp = NULL;
+ _fields = NULL;
+ _methods = NULL;
+ _inner_classes = NULL;
+ _local_interfaces = NULL;
+ _transitive_interfaces = NULL;
+ _combined_annotations = NULL;
+ _annotations = _type_annotations = NULL;
+ _fields_annotations = _fields_type_annotations = NULL;
+}
+
+// Destructor to clean up
+ClassFileParser::~ClassFileParser() {
+ if (_cp != NULL) {
+ MetadataFactory::free_metadata(_loader_data, _cp);
+ }
+ if (_fields != NULL) {
+ MetadataFactory::free_array<u2>(_loader_data, _fields);
+ }
+
+ if (_methods != NULL) {
+ // Free methods
+ InstanceKlass::deallocate_methods(_loader_data, _methods);
+ }
+
+ // beware of the Universe::empty_blah_array!!
+ if (_inner_classes != NULL && _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);
+
+ if (_combined_annotations != NULL) {
+ // After all annotations arrays have been created, they are installed into the
+ // Annotations object that will be assigned to the InstanceKlass being created.
+
+ // Deallocate the Annotations object and the installed annotations arrays.
+ _combined_annotations->deallocate_contents(_loader_data);
+
+ // If the _combined_annotations pointer is non-NULL,
+ // then the other annotations fields should have been cleared.
+ assert(_annotations == NULL, "Should have been cleared");
+ assert(_type_annotations == NULL, "Should have been cleared");
+ assert(_fields_annotations == NULL, "Should have been cleared");
+ assert(_fields_type_annotations == NULL, "Should have been cleared");
+ } else {
+ // If the annotations arrays were not installed into the Annotations object,
+ // then they have to be deallocated explicitly.
+ 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_to_deallocate != NULL) {
+ _loader_data->add_to_deallocate_list(_klass_to_deallocate);
+ }
+}
+
+void ClassFileParser::parse_stream(const ClassFileStream* const stream,
+ TRAPS) {
+
+ assert(stream != NULL, "invariant");
+ assert(_class_name != NULL, "invariant");
+
+ // BEGIN STREAM PARSING
+ stream->guarantee_more(8, CHECK); // magic, major, minor
+ // Magic value
+ const u4 magic = stream->get_u4_fast();
+ guarantee_property(magic == JAVA_CLASSFILE_MAGIC,
+ "Incompatible magic value %u in class file %s",
+ magic, CHECK);
+
+ // Version numbers
+ _minor_version = stream->get_u2_fast();
+ _major_version = stream->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, _class_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)) {
+ 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",
+ _class_name->as_C_string(),
+ _major_version,
+ _minor_version,
+ JAVA_MAX_SUPPORTED_VERSION,
+ JAVA_MAX_SUPPORTED_MINOR_VERSION);
+ return;
+ }
+
+ stream->guarantee_more(3, CHECK); // length, first cp tag
+ u2 cp_size = stream->get_u2_fast();
+
+ guarantee_property(
+ cp_size >= 1, "Illegal constant pool size %u in class file %s",
+ cp_size, CHECK);
+
+ _orig_cp_size = cp_size;
+ if (int(cp_size) + _max_num_patched_klasses > 0xffff) {
+ THROW_MSG(vmSymbols::java_lang_InternalError(), "not enough space for patched classes");
+ }
+ cp_size += _max_num_patched_klasses;
+
+ _cp = ConstantPool::allocate(_loader_data,
+ cp_size,
+ CHECK);
+
+ ConstantPool* const cp = _cp;
+
+ parse_constant_pool(stream, cp, _orig_cp_size, CHECK);
+
+ assert(cp_size == (const u2)cp->length(), "invariant");
+
+ // ACCESS FLAGS
+ stream->guarantee_more(8, CHECK); // flags, this_class, super_class, infs_len
+
+ // Access flags
+ jint flags;
+ // JVM_ACC_MODULE is defined in JDK-9 and later.
+ if (_major_version >= JAVA_9_VERSION) {
+ flags = stream->get_u2_fast() & (JVM_RECOGNIZED_CLASS_MODIFIERS | JVM_ACC_MODULE);
+ } else {
+ flags = stream->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);
+
+ short bad_constant = class_bad_constant_seen();
+ if (bad_constant != 0) {
+ // Do not throw CFE until after the access_flags are checked because if
+ // ACC_MODULE is set in the access flags, then NCDFE must be thrown, not CFE.
+ classfile_parse_error("Unknown constant tag %u in class file %s", bad_constant, CHECK);
+ }
+
+ _access_flags.set_flags(flags);
+
+ // This class and superclass
+ _this_class_index = stream->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);
+
+ Symbol* const class_name_in_cp = cp->klass_name_at(_this_class_index);
+ assert(class_name_in_cp != NULL, "class_name can't be null");
+
+ // Update _class_name which could be null previously
+ // to reflect the name in the constant pool
+ _class_name = class_name_in_cp;
+
+ // 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);
+ }
+
+ // Checks if name in class file matches requested name
+ if (_requested_name != NULL && _requested_name != _class_name) {
+ ResourceMark rm(THREAD);
+ Exceptions::fthrow(
+ THREAD_AND_LOCATION,
+ vmSymbols::java_lang_NoClassDefFoundError(),
+ "%s (wrong name: %s)",
+ _class_name->as_C_string(),
+ _requested_name != NULL ? _requested_name->as_C_string() : "NoName"
+ );
+ return;
+ }
+
+ // if this is an anonymous class fix up its name if it's in the unnamed
+ // package. Otherwise, throw IAE if it is in a different package than
+ // its host class.
+ if (_host_klass != NULL) {
+ fix_anonymous_class_name(CHECK);
+ }
+
+ // Verification prevents us from creating names with dots in them, this
+ // asserts that that's the case.
+ assert(is_internal_format(_class_name), "external class name format used internally");
+
+ if (!is_internal()) {
+ LogTarget(Debug, class, preorder) lt;
+ if (lt.is_enabled()){
+ ResourceMark rm(THREAD);
+ LogStream ls(lt);
+ ls.print("%s", _class_name->as_klass_external_name());
+ if (stream->source() != NULL) {
+ ls.print(" source: %s", stream->source());
+ }
+ ls.cr();
+ }
+
+#if INCLUDE_CDS
+ if (DumpLoadedClassList != NULL && stream->source() != NULL && classlist_file->is_open()) {
+ // Only dump the classes that can be stored into CDS archive.
+ // Anonymous classes such as generated LambdaForm classes are also not included.
+ if (SystemDictionaryShared::is_sharing_possible(_loader_data) &&
+ _host_klass == NULL) {
+ oop class_loader = _loader_data->class_loader();
+ ResourceMark rm(THREAD);
+ // For the boot and platform class loaders, check if the class is not found in the
+ // java runtime image. Additional check for the boot class loader is if the class
+ // is not found in the boot loader's appended entries. This indicates that the class
+ // is not useable during run time, such as the ones found in the --patch-module entries,
+ // so it should not be included in the classlist file.
+ if (((class_loader == NULL && !ClassLoader::contains_append_entry(stream->source())) ||
+ SystemDictionary::is_platform_class_loader(class_loader)) &&
+ !ClassLoader::is_jrt(stream->source())) {
+ tty->print_cr("skip writing class %s from source %s to classlist file",
+ _class_name->as_C_string(), stream->source());
+ } else {
+ classlist_file->print_cr("%s", _class_name->as_C_string());
+ classlist_file->flush();
+ }
+ }
+ }
+#endif
+ }
+
+ // SUPERKLASS
+ _super_class_index = stream->get_u2_fast();
+ _super_klass = parse_super_class(cp,
+ _super_class_index,
+ _need_verify,
+ CHECK);
+
+ // Interfaces
+ _itfs_len = stream->get_u2_fast();
+ parse_interfaces(stream,
+ _itfs_len,
+ cp,
+ &_has_nonstatic_concrete_methods,
+ CHECK);
+
+ assert(_local_interfaces != NULL, "invariant");
+
+ // Fields (offsets are filled in later)
+ _fac = new FieldAllocationCount();
+ parse_fields(stream,
+ _access_flags.is_interface(),
+ _fac,
+ cp,
+ cp_size,
+ &_java_fields_count,
+ CHECK);
+
+ assert(_fields != NULL, "invariant");
+
+ // Methods
+ AccessFlags promoted_flags;
+ parse_methods(stream,
+ _access_flags.is_interface(),
+ &promoted_flags,
+ &_has_final_method,
+ &_declares_nonstatic_concrete_methods,
+ CHECK);
+
+ assert(_methods != NULL, "invariant");
+
+ // promote flags from parse_methods() to the klass' flags
+ _access_flags.add_promoted_flags(promoted_flags.as_int());
+
+ if (_declares_nonstatic_concrete_methods) {
+ _has_nonstatic_concrete_methods = true;
+ }
+
+ // Additional attributes/annotations
+ _parsed_annotations = new ClassAnnotationCollector();
+ parse_classfile_attributes(stream, cp, _parsed_annotations, CHECK);
+
+ assert(_inner_classes != NULL, "invariant");
+
+ // Finalize the Annotations metadata object,
+ // now that all annotation arrays have been created.
+ create_combined_annotations(CHECK);
+
+ // Make sure this is the end of class file stream
+ guarantee_property(stream->at_eos(),
+ "Extra bytes at the end of class file %s",
+ CHECK);
+
+ // all bytes in stream read and parsed
+}
+
+void ClassFileParser::post_process_parsed_stream(const ClassFileStream* const stream,
+ ConstantPool* cp,
+ TRAPS) {
+ assert(stream != NULL, "invariant");
+ assert(stream->at_eos(), "invariant");
+ assert(cp != NULL, "invariant");
+ assert(_loader_data != NULL, "invariant");
+
+ if (_class_name == vmSymbols::java_lang_Object()) {
+ check_property(_local_interfaces == Universe::the_empty_klass_array(),
+ "java.lang.Object cannot implement an interface in class file %s",
+ CHECK);
+ }
+ // We check super class after class file is parsed and format is checked
+ if (_super_class_index > 0 && NULL ==_super_klass) {
+ Symbol* const super_class_name = 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(super_class_name == vmSymbols::java_lang_Object(),
+ "Interfaces must have java.lang.Object as superclass in class file %s",
+ CHECK);
+ }
+ Handle loader(THREAD, _loader_data->class_loader());
+ _super_klass = (const InstanceKlass*)
+ SystemDictionary::resolve_super_or_fail(_class_name,
+ super_class_name,
+ loader,
+ _protection_domain,
+ true,
+ CHECK);
+ }
+
+ if (_super_klass != NULL) {
+ if (_super_klass->has_nonstatic_concrete_methods()) {
+ _has_nonstatic_concrete_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;
+ }
+ // Make sure super class is not final
+ if (_super_klass->is_final()) {
+ THROW_MSG(vmSymbols::java_lang_VerifyError(), "Cannot inherit from final class");
+ }
+ }
+
+ // Compute the transitive list of all unique interfaces implemented by this class
+ _transitive_interfaces =
+ compute_transitive_interfaces(_super_klass,
+ _local_interfaces,
+ _loader_data,
+ CHECK);
+
+ assert(_transitive_interfaces != NULL, "invariant");
+
+ // sort methods
+ _method_ordering = sort_methods(_methods);
+
+ _all_mirandas = new GrowableArray<Method*>(20);
+
+ Handle loader(THREAD, _loader_data->class_loader());
+ klassVtable::compute_vtable_size_and_num_mirandas(&_vtable_size,
+ &_num_miranda_methods,
+ _all_mirandas,
+ _super_klass,
+ _methods,
+ _access_flags,
+ _major_version,
+ loader,
+ _class_name,
+ _local_interfaces,
+ CHECK);
+
+ // Size of Java itable (in words)
+ _itable_size = _access_flags.is_interface() ? 0 :
+ klassItable::compute_itable_size(_transitive_interfaces);
+
+ assert(_fac != NULL, "invariant");
+ assert(_parsed_annotations != NULL, "invariant");
+
+ _field_info = new FieldLayoutInfo();
+ layout_fields(cp, _fac, _parsed_annotations, _field_info, CHECK);
+
+ // Compute reference typ
+ _rt = (NULL ==_super_klass) ? REF_NONE : _super_klass->reference_type();
+
+}
+
+void ClassFileParser::set_klass(InstanceKlass* klass) {
+
+#ifdef ASSERT
+ if (klass != NULL) {
+ assert(NULL == _klass, "leaking?");
+ }
+#endif
+
+ _klass = klass;
+}
+
+void ClassFileParser::set_klass_to_deallocate(InstanceKlass* klass) {
+
+#ifdef ASSERT
+ if (klass != NULL) {
+ assert(NULL == _klass_to_deallocate, "leaking?");
+ }
+#endif
+
+ _klass_to_deallocate = klass;
+}
+
+// Caller responsible for ResourceMark
+// clone stream with rewound position
+const ClassFileStream* ClassFileParser::clone_stream() const {
+ assert(_stream != NULL, "invariant");
+
+ return _stream->clone();
+}
+// ----------------------------------------------------------------------------
+// debugging
+
+#ifdef ASSERT
+
+// return true if class_name contains no '.' (internal format is '/')
+bool ClassFileParser::is_internal_format(Symbol* class_name) {
+ if (class_name != NULL) {
+ ResourceMark rm;
+ char* name = class_name->as_C_string();
+ return strchr(name, '.') == NULL;
+ } else {
+ return true;
+ }
+}
+
+#endif