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https://github.com/openjdk/jdk.git
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967c448681
Changes the implementation of java.time.Clock.systemUTC() to take advantage of the maximum resolution of the underlying native clock on which System.currentTimeMillis() is based. Reviewed-by: dholmes, rriggs, scolebourne, sla
3733 lines
140 KiB
C++
3733 lines
140 KiB
C++
/*
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* Copyright (c) 1997, 2015, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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#include "precompiled.hpp"
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#include "classfile/classLoader.hpp"
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#include "classfile/javaAssertions.hpp"
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#include "classfile/javaClasses.hpp"
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#include "classfile/stringTable.hpp"
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#include "classfile/systemDictionary.hpp"
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#include "classfile/vmSymbols.hpp"
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#include "gc_interface/collectedHeap.inline.hpp"
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#include "interpreter/bytecode.hpp"
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#include "memory/oopFactory.hpp"
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#include "memory/universe.inline.hpp"
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#include "oops/fieldStreams.hpp"
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#include "oops/instanceKlass.hpp"
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#include "oops/objArrayKlass.hpp"
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#include "oops/method.hpp"
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#include "prims/jvm.h"
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#include "prims/jvm_misc.hpp"
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#include "prims/jvmtiExport.hpp"
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#include "prims/jvmtiThreadState.hpp"
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#include "prims/nativeLookup.hpp"
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#include "prims/privilegedStack.hpp"
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#include "runtime/arguments.hpp"
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#include "runtime/atomic.inline.hpp"
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#include "runtime/dtraceJSDT.hpp"
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#include "runtime/handles.inline.hpp"
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#include "runtime/init.hpp"
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#include "runtime/interfaceSupport.hpp"
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#include "runtime/java.hpp"
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#include "runtime/javaCalls.hpp"
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#include "runtime/jfieldIDWorkaround.hpp"
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#include "runtime/orderAccess.inline.hpp"
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#include "runtime/os.inline.hpp"
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#include "runtime/perfData.hpp"
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#include "runtime/reflection.hpp"
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#include "runtime/thread.inline.hpp"
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#include "runtime/vframe.hpp"
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#include "runtime/vm_operations.hpp"
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#include "runtime/vm_version.hpp"
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#include "services/attachListener.hpp"
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#include "services/management.hpp"
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#include "services/threadService.hpp"
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#include "trace/tracing.hpp"
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#include "utilities/copy.hpp"
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#include "utilities/defaultStream.hpp"
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#include "utilities/dtrace.hpp"
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#include "utilities/events.hpp"
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#include "utilities/histogram.hpp"
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#include "utilities/macros.hpp"
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#include "utilities/top.hpp"
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#include "utilities/utf8.hpp"
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#if INCLUDE_CDS
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#include "classfile/sharedClassUtil.hpp"
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#include "classfile/systemDictionaryShared.hpp"
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#endif
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#ifdef TARGET_OS_FAMILY_linux
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# include "jvm_linux.h"
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#endif
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#ifdef TARGET_OS_FAMILY_solaris
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# include "jvm_solaris.h"
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#endif
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#ifdef TARGET_OS_FAMILY_windows
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# include "jvm_windows.h"
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#endif
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#ifdef TARGET_OS_FAMILY_aix
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# include "jvm_aix.h"
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#endif
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#ifdef TARGET_OS_FAMILY_bsd
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# include "jvm_bsd.h"
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#endif
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#include <errno.h>
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/*
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NOTE about use of any ctor or function call that can trigger a safepoint/GC:
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such ctors and calls MUST NOT come between an oop declaration/init and its
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usage because if objects are move this may cause various memory stomps, bus
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errors and segfaults. Here is a cookbook for causing so called "naked oop
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failures":
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JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields<etc> {
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JVMWrapper("JVM_GetClassDeclaredFields");
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// Object address to be held directly in mirror & not visible to GC
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oop mirror = JNIHandles::resolve_non_null(ofClass);
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// If this ctor can hit a safepoint, moving objects around, then
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ComplexConstructor foo;
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// Boom! mirror may point to JUNK instead of the intended object
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(some dereference of mirror)
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// Here's another call that may block for GC, making mirror stale
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MutexLocker ml(some_lock);
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// And here's an initializer that can result in a stale oop
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// all in one step.
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oop o = call_that_can_throw_exception(TRAPS);
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The solution is to keep the oop declaration BELOW the ctor or function
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call that might cause a GC, do another resolve to reassign the oop, or
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consider use of a Handle instead of an oop so there is immunity from object
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motion. But note that the "QUICK" entries below do not have a handlemark
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and thus can only support use of handles passed in.
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*/
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static void trace_class_resolution_impl(Klass* to_class, TRAPS) {
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ResourceMark rm;
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int line_number = -1;
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const char * source_file = NULL;
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const char * trace = "explicit";
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InstanceKlass* caller = NULL;
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JavaThread* jthread = JavaThread::current();
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if (jthread->has_last_Java_frame()) {
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vframeStream vfst(jthread);
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// scan up the stack skipping ClassLoader, AccessController and PrivilegedAction frames
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TempNewSymbol access_controller = SymbolTable::new_symbol("java/security/AccessController", CHECK);
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Klass* access_controller_klass = SystemDictionary::resolve_or_fail(access_controller, false, CHECK);
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TempNewSymbol privileged_action = SymbolTable::new_symbol("java/security/PrivilegedAction", CHECK);
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Klass* privileged_action_klass = SystemDictionary::resolve_or_fail(privileged_action, false, CHECK);
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Method* last_caller = NULL;
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while (!vfst.at_end()) {
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Method* m = vfst.method();
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if (!vfst.method()->method_holder()->is_subclass_of(SystemDictionary::ClassLoader_klass())&&
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!vfst.method()->method_holder()->is_subclass_of(access_controller_klass) &&
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!vfst.method()->method_holder()->is_subclass_of(privileged_action_klass)) {
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break;
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}
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last_caller = m;
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vfst.next();
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}
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// if this is called from Class.forName0 and that is called from Class.forName,
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// then print the caller of Class.forName. If this is Class.loadClass, then print
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// that caller, otherwise keep quiet since this should be picked up elsewhere.
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bool found_it = false;
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if (!vfst.at_end() &&
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vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
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vfst.method()->name() == vmSymbols::forName0_name()) {
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vfst.next();
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if (!vfst.at_end() &&
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vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
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vfst.method()->name() == vmSymbols::forName_name()) {
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vfst.next();
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found_it = true;
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}
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} else if (last_caller != NULL &&
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last_caller->method_holder()->name() ==
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vmSymbols::java_lang_ClassLoader() &&
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(last_caller->name() == vmSymbols::loadClassInternal_name() ||
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last_caller->name() == vmSymbols::loadClass_name())) {
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found_it = true;
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} else if (!vfst.at_end()) {
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if (vfst.method()->is_native()) {
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// JNI call
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found_it = true;
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}
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}
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if (found_it && !vfst.at_end()) {
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// found the caller
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caller = vfst.method()->method_holder();
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line_number = vfst.method()->line_number_from_bci(vfst.bci());
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if (line_number == -1) {
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// show method name if it's a native method
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trace = vfst.method()->name_and_sig_as_C_string();
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}
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Symbol* s = caller->source_file_name();
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if (s != NULL) {
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source_file = s->as_C_string();
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}
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}
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}
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if (caller != NULL) {
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if (to_class != caller) {
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const char * from = caller->external_name();
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const char * to = to_class->external_name();
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// print in a single call to reduce interleaving between threads
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if (source_file != NULL) {
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tty->print("RESOLVE %s %s %s:%d (%s)\n", from, to, source_file, line_number, trace);
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} else {
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tty->print("RESOLVE %s %s (%s)\n", from, to, trace);
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}
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}
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}
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}
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void trace_class_resolution(Klass* to_class) {
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EXCEPTION_MARK;
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trace_class_resolution_impl(to_class, THREAD);
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if (HAS_PENDING_EXCEPTION) {
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CLEAR_PENDING_EXCEPTION;
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}
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}
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// Wrapper to trace JVM functions
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#ifdef ASSERT
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class JVMTraceWrapper : public StackObj {
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public:
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JVMTraceWrapper(const char* format, ...) ATTRIBUTE_PRINTF(2, 3) {
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if (TraceJVMCalls) {
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va_list ap;
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va_start(ap, format);
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tty->print("JVM ");
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tty->vprint_cr(format, ap);
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va_end(ap);
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}
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}
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};
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Histogram* JVMHistogram;
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volatile jint JVMHistogram_lock = 0;
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class JVMHistogramElement : public HistogramElement {
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public:
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JVMHistogramElement(const char* name);
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};
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JVMHistogramElement::JVMHistogramElement(const char* elementName) {
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_name = elementName;
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uintx count = 0;
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while (Atomic::cmpxchg(1, &JVMHistogram_lock, 0) != 0) {
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while (OrderAccess::load_acquire(&JVMHistogram_lock) != 0) {
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count +=1;
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if ( (WarnOnStalledSpinLock > 0)
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&& (count % WarnOnStalledSpinLock == 0)) {
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warning("JVMHistogram_lock seems to be stalled");
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}
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}
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}
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if(JVMHistogram == NULL)
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JVMHistogram = new Histogram("JVM Call Counts",100);
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JVMHistogram->add_element(this);
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Atomic::dec(&JVMHistogram_lock);
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}
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#define JVMCountWrapper(arg) \
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static JVMHistogramElement* e = new JVMHistogramElement(arg); \
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if (e != NULL) e->increment_count(); // Due to bug in VC++, we need a NULL check here eventhough it should never happen!
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#define JVMWrapper(arg1) JVMCountWrapper(arg1); JVMTraceWrapper(arg1)
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#define JVMWrapper2(arg1, arg2) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2)
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#define JVMWrapper3(arg1, arg2, arg3) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3)
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#define JVMWrapper4(arg1, arg2, arg3, arg4) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3, arg4)
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#else
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#define JVMWrapper(arg1)
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#define JVMWrapper2(arg1, arg2)
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#define JVMWrapper3(arg1, arg2, arg3)
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#define JVMWrapper4(arg1, arg2, arg3, arg4)
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#endif
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// Interface version /////////////////////////////////////////////////////////////////////
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JVM_LEAF(jint, JVM_GetInterfaceVersion())
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return JVM_INTERFACE_VERSION;
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JVM_END
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// java.lang.System //////////////////////////////////////////////////////////////////////
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JVM_LEAF(jlong, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored))
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JVMWrapper("JVM_CurrentTimeMillis");
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return os::javaTimeMillis();
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JVM_END
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JVM_LEAF(jlong, JVM_NanoTime(JNIEnv *env, jclass ignored))
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JVMWrapper("JVM_NanoTime");
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return os::javaTimeNanos();
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JVM_END
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// The function below is actually exposed by sun.misc.VM and not
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// java.lang.System, but we choose to keep it here so that it stays next
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// to JVM_CurrentTimeMillis and JVM_NanoTime
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const jlong MAX_DIFF_SECS = 0x0100000000; // 2^32
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const jlong MIN_DIFF_SECS = -MAX_DIFF_SECS; // -2^32
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JVM_LEAF(jlong, JVM_GetNanoTimeAdjustment(JNIEnv *env, jclass ignored, jlong offset_secs))
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JVMWrapper("JVM_GetNanoTimeAdjustment");
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jlong seconds;
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jlong nanos;
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os::javaTimeSystemUTC(seconds, nanos);
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// We're going to verify that the result can fit in a long.
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// For that we need the difference in seconds between 'seconds'
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// and 'offset_secs' to be such that:
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// |seconds - offset_secs| < (2^63/10^9)
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// We're going to approximate 10^9 ~< 2^30 (1000^3 ~< 1024^3)
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// which makes |seconds - offset_secs| < 2^33
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// and we will prefer +/- 2^32 as the maximum acceptable diff
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// as 2^32 has a more natural feel than 2^33...
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//
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// So if |seconds - offset_secs| >= 2^32 - we return a special
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// sentinel value (-1) which the caller should take as an
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// exception value indicating that the offset given to us is
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// too far from range of the current time - leading to too big
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// a nano adjustment. The caller is expected to recover by
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// computing a more accurate offset and calling this method
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// again. (For the record 2^32 secs is ~136 years, so that
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// should rarely happen)
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//
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jlong diff = seconds - offset_secs;
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if (diff >= MAX_DIFF_SECS || diff <= MIN_DIFF_SECS) {
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return -1; // sentinel value: the offset is too far off the target
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}
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// return the adjustment. If you compute a time by adding
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// this number of nanoseconds along with the number of seconds
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// in the offset you should get the current UTC time.
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return (diff * (jlong)1000000000) + nanos;
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JVM_END
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JVM_ENTRY(void, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos,
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jobject dst, jint dst_pos, jint length))
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JVMWrapper("JVM_ArrayCopy");
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// Check if we have null pointers
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if (src == NULL || dst == NULL) {
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THROW(vmSymbols::java_lang_NullPointerException());
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}
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arrayOop s = arrayOop(JNIHandles::resolve_non_null(src));
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arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst));
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assert(s->is_oop(), "JVM_ArrayCopy: src not an oop");
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assert(d->is_oop(), "JVM_ArrayCopy: dst not an oop");
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// Do copy
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s->klass()->copy_array(s, src_pos, d, dst_pos, length, thread);
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JVM_END
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static void set_property(Handle props, const char* key, const char* value, TRAPS) {
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JavaValue r(T_OBJECT);
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// public synchronized Object put(Object key, Object value);
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HandleMark hm(THREAD);
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Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK);
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Handle value_str = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK);
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JavaCalls::call_virtual(&r,
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props,
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KlassHandle(THREAD, SystemDictionary::Properties_klass()),
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vmSymbols::put_name(),
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vmSymbols::object_object_object_signature(),
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key_str,
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value_str,
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THREAD);
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}
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#define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties));
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JVM_ENTRY(jobject, JVM_InitProperties(JNIEnv *env, jobject properties))
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JVMWrapper("JVM_InitProperties");
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ResourceMark rm;
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Handle props(THREAD, JNIHandles::resolve_non_null(properties));
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// System property list includes both user set via -D option and
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// jvm system specific properties.
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for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
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PUTPROP(props, p->key(), p->value());
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}
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// Convert the -XX:MaxDirectMemorySize= command line flag
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// to the sun.nio.MaxDirectMemorySize property.
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// Do this after setting user properties to prevent people
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// from setting the value with a -D option, as requested.
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{
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if (FLAG_IS_DEFAULT(MaxDirectMemorySize)) {
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PUTPROP(props, "sun.nio.MaxDirectMemorySize", "-1");
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} else {
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char as_chars[256];
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jio_snprintf(as_chars, sizeof(as_chars), UINTX_FORMAT, MaxDirectMemorySize);
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PUTPROP(props, "sun.nio.MaxDirectMemorySize", as_chars);
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}
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}
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// JVM monitoring and management support
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// Add the sun.management.compiler property for the compiler's name
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{
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#undef CSIZE
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#if defined(_LP64) || defined(_WIN64)
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#define CSIZE "64-Bit "
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#else
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#define CSIZE
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#endif // 64bit
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#ifdef TIERED
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const char* compiler_name = "HotSpot " CSIZE "Tiered Compilers";
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#else
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#if defined(COMPILER1)
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const char* compiler_name = "HotSpot " CSIZE "Client Compiler";
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#elif defined(COMPILER2)
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const char* compiler_name = "HotSpot " CSIZE "Server Compiler";
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#else
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const char* compiler_name = "";
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#endif // compilers
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#endif // TIERED
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if (*compiler_name != '\0' &&
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(Arguments::mode() != Arguments::_int)) {
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PUTPROP(props, "sun.management.compiler", compiler_name);
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}
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}
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return properties;
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JVM_END
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/*
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* Return the temporary directory that the VM uses for the attach
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* and perf data files.
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*
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* It is important that this directory is well-known and the
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* same for all VM instances. It cannot be affected by configuration
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* variables such as java.io.tmpdir.
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*/
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JVM_ENTRY(jstring, JVM_GetTemporaryDirectory(JNIEnv *env))
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JVMWrapper("JVM_GetTemporaryDirectory");
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HandleMark hm(THREAD);
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const char* temp_dir = os::get_temp_directory();
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Handle h = java_lang_String::create_from_platform_dependent_str(temp_dir, CHECK_NULL);
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return (jstring) JNIHandles::make_local(env, h());
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JVM_END
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// java.lang.Runtime /////////////////////////////////////////////////////////////////////////
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|
|
extern volatile jint vm_created;
|
|
|
|
JVM_ENTRY_NO_ENV(void, JVM_Halt(jint code))
|
|
before_exit(thread);
|
|
vm_exit(code);
|
|
JVM_END
|
|
|
|
|
|
JVM_ENTRY_NO_ENV(void, JVM_GC(void))
|
|
JVMWrapper("JVM_GC");
|
|
if (!DisableExplicitGC) {
|
|
Universe::heap()->collect(GCCause::_java_lang_system_gc);
|
|
}
|
|
JVM_END
|
|
|
|
|
|
JVM_LEAF(jlong, JVM_MaxObjectInspectionAge(void))
|
|
JVMWrapper("JVM_MaxObjectInspectionAge");
|
|
return Universe::heap()->millis_since_last_gc();
|
|
JVM_END
|
|
|
|
|
|
static inline jlong convert_size_t_to_jlong(size_t val) {
|
|
// In the 64-bit vm, a size_t can overflow a jlong (which is signed).
|
|
NOT_LP64 (return (jlong)val;)
|
|
LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);)
|
|
}
|
|
|
|
JVM_ENTRY_NO_ENV(jlong, JVM_TotalMemory(void))
|
|
JVMWrapper("JVM_TotalMemory");
|
|
size_t n = Universe::heap()->capacity();
|
|
return convert_size_t_to_jlong(n);
|
|
JVM_END
|
|
|
|
|
|
JVM_ENTRY_NO_ENV(jlong, JVM_FreeMemory(void))
|
|
JVMWrapper("JVM_FreeMemory");
|
|
CollectedHeap* ch = Universe::heap();
|
|
size_t n;
|
|
{
|
|
MutexLocker x(Heap_lock);
|
|
n = ch->capacity() - ch->used();
|
|
}
|
|
return convert_size_t_to_jlong(n);
|
|
JVM_END
|
|
|
|
|
|
JVM_ENTRY_NO_ENV(jlong, JVM_MaxMemory(void))
|
|
JVMWrapper("JVM_MaxMemory");
|
|
size_t n = Universe::heap()->max_capacity();
|
|
return convert_size_t_to_jlong(n);
|
|
JVM_END
|
|
|
|
|
|
JVM_ENTRY_NO_ENV(jint, JVM_ActiveProcessorCount(void))
|
|
JVMWrapper("JVM_ActiveProcessorCount");
|
|
return os::active_processor_count();
|
|
JVM_END
|
|
|
|
|
|
|
|
// java.lang.Throwable //////////////////////////////////////////////////////
|
|
|
|
|
|
JVM_ENTRY(void, JVM_FillInStackTrace(JNIEnv *env, jobject receiver))
|
|
JVMWrapper("JVM_FillInStackTrace");
|
|
Handle exception(thread, JNIHandles::resolve_non_null(receiver));
|
|
java_lang_Throwable::fill_in_stack_trace(exception);
|
|
JVM_END
|
|
|
|
|
|
JVM_ENTRY(jint, JVM_GetStackTraceDepth(JNIEnv *env, jobject throwable))
|
|
JVMWrapper("JVM_GetStackTraceDepth");
|
|
oop exception = JNIHandles::resolve(throwable);
|
|
return java_lang_Throwable::get_stack_trace_depth(exception, THREAD);
|
|
JVM_END
|
|
|
|
|
|
JVM_ENTRY(jobject, JVM_GetStackTraceElement(JNIEnv *env, jobject throwable, jint index))
|
|
JVMWrapper("JVM_GetStackTraceElement");
|
|
JvmtiVMObjectAllocEventCollector oam; // This ctor (throughout this module) may trigger a safepoint/GC
|
|
oop exception = JNIHandles::resolve(throwable);
|
|
oop element = java_lang_Throwable::get_stack_trace_element(exception, index, CHECK_NULL);
|
|
return JNIHandles::make_local(env, element);
|
|
JVM_END
|
|
|
|
|
|
// java.lang.Object ///////////////////////////////////////////////
|
|
|
|
|
|
JVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle))
|
|
JVMWrapper("JVM_IHashCode");
|
|
// as implemented in the classic virtual machine; return 0 if object is NULL
|
|
return handle == NULL ? 0 : ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)) ;
|
|
JVM_END
|
|
|
|
|
|
JVM_ENTRY(void, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms))
|
|
JVMWrapper("JVM_MonitorWait");
|
|
Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
|
|
JavaThreadInObjectWaitState jtiows(thread, ms != 0);
|
|
if (JvmtiExport::should_post_monitor_wait()) {
|
|
JvmtiExport::post_monitor_wait((JavaThread *)THREAD, (oop)obj(), ms);
|
|
|
|
// The current thread already owns the monitor and it has not yet
|
|
// been added to the wait queue so the current thread cannot be
|
|
// made the successor. This means that the JVMTI_EVENT_MONITOR_WAIT
|
|
// event handler cannot accidentally consume an unpark() meant for
|
|
// the ParkEvent associated with this ObjectMonitor.
|
|
}
|
|
ObjectSynchronizer::wait(obj, ms, CHECK);
|
|
JVM_END
|
|
|
|
|
|
JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle))
|
|
JVMWrapper("JVM_MonitorNotify");
|
|
Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
|
|
ObjectSynchronizer::notify(obj, CHECK);
|
|
JVM_END
|
|
|
|
|
|
JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle))
|
|
JVMWrapper("JVM_MonitorNotifyAll");
|
|
Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
|
|
ObjectSynchronizer::notifyall(obj, CHECK);
|
|
JVM_END
|
|
|
|
|
|
JVM_ENTRY(jobject, JVM_Clone(JNIEnv* env, jobject handle))
|
|
JVMWrapper("JVM_Clone");
|
|
Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
|
|
const KlassHandle klass (THREAD, obj->klass());
|
|
JvmtiVMObjectAllocEventCollector oam;
|
|
|
|
#ifdef ASSERT
|
|
// Just checking that the cloneable flag is set correct
|
|
if (obj->is_array()) {
|
|
guarantee(klass->is_cloneable(), "all arrays are cloneable");
|
|
} else {
|
|
guarantee(obj->is_instance(), "should be instanceOop");
|
|
bool cloneable = klass->is_subtype_of(SystemDictionary::Cloneable_klass());
|
|
guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag");
|
|
}
|
|
#endif
|
|
|
|
// Check if class of obj supports the Cloneable interface.
|
|
// All arrays are considered to be cloneable (See JLS 20.1.5)
|
|
if (!klass->is_cloneable()) {
|
|
ResourceMark rm(THREAD);
|
|
THROW_MSG_0(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name());
|
|
}
|
|
|
|
// Make shallow object copy
|
|
const int size = obj->size();
|
|
oop new_obj_oop = NULL;
|
|
if (obj->is_array()) {
|
|
const int length = ((arrayOop)obj())->length();
|
|
new_obj_oop = CollectedHeap::array_allocate(klass, size, length, CHECK_NULL);
|
|
} else {
|
|
new_obj_oop = CollectedHeap::obj_allocate(klass, size, CHECK_NULL);
|
|
}
|
|
|
|
// 4839641 (4840070): We must do an oop-atomic copy, because if another thread
|
|
// is modifying a reference field in the clonee, a non-oop-atomic copy might
|
|
// be suspended in the middle of copying the pointer and end up with parts
|
|
// of two different pointers in the field. Subsequent dereferences will crash.
|
|
// 4846409: an oop-copy of objects with long or double fields or arrays of same
|
|
// won't copy the longs/doubles atomically in 32-bit vm's, so we copy jlongs instead
|
|
// of oops. We know objects are aligned on a minimum of an jlong boundary.
|
|
// The same is true of StubRoutines::object_copy and the various oop_copy
|
|
// variants, and of the code generated by the inline_native_clone intrinsic.
|
|
assert(MinObjAlignmentInBytes >= BytesPerLong, "objects misaligned");
|
|
Copy::conjoint_jlongs_atomic((jlong*)obj(), (jlong*)new_obj_oop,
|
|
(size_t)align_object_size(size) / HeapWordsPerLong);
|
|
// Clear the header
|
|
new_obj_oop->init_mark();
|
|
|
|
// Store check (mark entire object and let gc sort it out)
|
|
BarrierSet* bs = Universe::heap()->barrier_set();
|
|
assert(bs->has_write_region_opt(), "Barrier set does not have write_region");
|
|
bs->write_region(MemRegion((HeapWord*)new_obj_oop, size));
|
|
|
|
Handle new_obj(THREAD, new_obj_oop);
|
|
// Special handling for MemberNames. Since they contain Method* metadata, they
|
|
// must be registered so that RedefineClasses can fix metadata contained in them.
|
|
if (java_lang_invoke_MemberName::is_instance(new_obj()) &&
|
|
java_lang_invoke_MemberName::is_method(new_obj())) {
|
|
Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(new_obj());
|
|
// MemberName may be unresolved, so doesn't need registration until resolved.
|
|
if (method != NULL) {
|
|
methodHandle m(THREAD, method);
|
|
// This can safepoint and redefine method, so need both new_obj and method
|
|
// in a handle, for two different reasons. new_obj can move, method can be
|
|
// deleted if nothing is using it on the stack.
|
|
m->method_holder()->add_member_name(new_obj());
|
|
}
|
|
}
|
|
|
|
// Caution: this involves a java upcall, so the clone should be
|
|
// "gc-robust" by this stage.
|
|
if (klass->has_finalizer()) {
|
|
assert(obj->is_instance(), "should be instanceOop");
|
|
new_obj_oop = InstanceKlass::register_finalizer(instanceOop(new_obj()), CHECK_NULL);
|
|
new_obj = Handle(THREAD, new_obj_oop);
|
|
}
|
|
|
|
return JNIHandles::make_local(env, new_obj());
|
|
JVM_END
|
|
|
|
// java.io.File ///////////////////////////////////////////////////////////////
|
|
|
|
JVM_LEAF(char*, JVM_NativePath(char* path))
|
|
JVMWrapper2("JVM_NativePath (%s)", path);
|
|
return os::native_path(path);
|
|
JVM_END
|
|
|
|
|
|
// Misc. class handling ///////////////////////////////////////////////////////////
|
|
|
|
|
|
JVM_ENTRY(jclass, JVM_GetCallerClass(JNIEnv* env, int depth))
|
|
JVMWrapper("JVM_GetCallerClass");
|
|
|
|
// Pre-JDK 8 and early builds of JDK 8 don't have a CallerSensitive annotation; or
|
|
// sun.reflect.Reflection.getCallerClass with a depth parameter is provided
|
|
// temporarily for existing code to use until a replacement API is defined.
|
|
if (SystemDictionary::reflect_CallerSensitive_klass() == NULL || depth != JVM_CALLER_DEPTH) {
|
|
Klass* k = thread->security_get_caller_class(depth);
|
|
return (k == NULL) ? NULL : (jclass) JNIHandles::make_local(env, k->java_mirror());
|
|
}
|
|
|
|
// Getting the class of the caller frame.
|
|
//
|
|
// The call stack at this point looks something like this:
|
|
//
|
|
// [0] [ @CallerSensitive public sun.reflect.Reflection.getCallerClass ]
|
|
// [1] [ @CallerSensitive API.method ]
|
|
// [.] [ (skipped intermediate frames) ]
|
|
// [n] [ caller ]
|
|
vframeStream vfst(thread);
|
|
// Cf. LibraryCallKit::inline_native_Reflection_getCallerClass
|
|
for (int n = 0; !vfst.at_end(); vfst.security_next(), n++) {
|
|
Method* m = vfst.method();
|
|
assert(m != NULL, "sanity");
|
|
switch (n) {
|
|
case 0:
|
|
// This must only be called from Reflection.getCallerClass
|
|
if (m->intrinsic_id() != vmIntrinsics::_getCallerClass) {
|
|
THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetCallerClass must only be called from Reflection.getCallerClass");
|
|
}
|
|
// fall-through
|
|
case 1:
|
|
// Frame 0 and 1 must be caller sensitive.
|
|
if (!m->caller_sensitive()) {
|
|
THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), err_msg("CallerSensitive annotation expected at frame %d", n));
|
|
}
|
|
break;
|
|
default:
|
|
if (!m->is_ignored_by_security_stack_walk()) {
|
|
// We have reached the desired frame; return the holder class.
|
|
return (jclass) JNIHandles::make_local(env, m->method_holder()->java_mirror());
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
return NULL;
|
|
JVM_END
|
|
|
|
|
|
JVM_ENTRY(jclass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf))
|
|
JVMWrapper("JVM_FindPrimitiveClass");
|
|
oop mirror = NULL;
|
|
BasicType t = name2type(utf);
|
|
if (t != T_ILLEGAL && t != T_OBJECT && t != T_ARRAY) {
|
|
mirror = Universe::java_mirror(t);
|
|
}
|
|
if (mirror == NULL) {
|
|
THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf);
|
|
} else {
|
|
return (jclass) JNIHandles::make_local(env, mirror);
|
|
}
|
|
JVM_END
|
|
|
|
|
|
// Returns a class loaded by the bootstrap class loader; or null
|
|
// if not found. ClassNotFoundException is not thrown.
|
|
// FindClassFromBootLoader is exported to the launcher for windows.
|
|
JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env,
|
|
const char* name))
|
|
JVMWrapper2("JVM_FindClassFromBootLoader %s", name);
|
|
|
|
// Java libraries should ensure that name is never null...
|
|
if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
|
|
// It's impossible to create this class; the name cannot fit
|
|
// into the constant pool.
|
|
return NULL;
|
|
}
|
|
|
|
TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
|
|
Klass* k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL);
|
|
if (k == NULL) {
|
|
return NULL;
|
|
}
|
|
|
|
if (TraceClassResolution) {
|
|
trace_class_resolution(k);
|
|
}
|
|
return (jclass) JNIHandles::make_local(env, k->java_mirror());
|
|
JVM_END
|
|
|
|
// Find a class with this name in this loader, using the caller's protection domain.
|
|
JVM_ENTRY(jclass, JVM_FindClassFromCaller(JNIEnv* env, const char* name,
|
|
jboolean init, jobject loader,
|
|
jclass caller))
|
|
JVMWrapper2("JVM_FindClassFromCaller %s throws ClassNotFoundException", name);
|
|
// Java libraries should ensure that name is never null...
|
|
if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
|
|
// It's impossible to create this class; the name cannot fit
|
|
// into the constant pool.
|
|
THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name);
|
|
}
|
|
|
|
TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
|
|
|
|
oop loader_oop = JNIHandles::resolve(loader);
|
|
oop from_class = JNIHandles::resolve(caller);
|
|
oop protection_domain = NULL;
|
|
// If loader is null, shouldn't call ClassLoader.checkPackageAccess; otherwise get
|
|
// NPE. Put it in another way, the bootstrap class loader has all permission and
|
|
// thus no checkPackageAccess equivalence in the VM class loader.
|
|
// The caller is also passed as NULL by the java code if there is no security
|
|
// manager to avoid the performance cost of getting the calling class.
|
|
if (from_class != NULL && loader_oop != NULL) {
|
|
protection_domain = java_lang_Class::as_Klass(from_class)->protection_domain();
|
|
}
|
|
|
|
Handle h_loader(THREAD, loader_oop);
|
|
Handle h_prot(THREAD, protection_domain);
|
|
jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
|
|
h_prot, false, THREAD);
|
|
|
|
if (TraceClassResolution && result != NULL) {
|
|
trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
|
|
}
|
|
return result;
|
|
JVM_END
|
|
|
|
JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name,
|
|
jboolean init, jclass from))
|
|
JVMWrapper2("JVM_FindClassFromClass %s", name);
|
|
if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
|
|
// It's impossible to create this class; the name cannot fit
|
|
// into the constant pool.
|
|
THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
|
|
}
|
|
TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
|
|
oop from_class_oop = JNIHandles::resolve(from);
|
|
Klass* from_class = (from_class_oop == NULL)
|
|
? (Klass*)NULL
|
|
: java_lang_Class::as_Klass(from_class_oop);
|
|
oop class_loader = NULL;
|
|
oop protection_domain = NULL;
|
|
if (from_class != NULL) {
|
|
class_loader = from_class->class_loader();
|
|
protection_domain = from_class->protection_domain();
|
|
}
|
|
Handle h_loader(THREAD, class_loader);
|
|
Handle h_prot (THREAD, protection_domain);
|
|
jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
|
|
h_prot, true, thread);
|
|
|
|
if (TraceClassResolution && result != NULL) {
|
|
// this function is generally only used for class loading during verification.
|
|
ResourceMark rm;
|
|
oop from_mirror = JNIHandles::resolve_non_null(from);
|
|
Klass* from_class = java_lang_Class::as_Klass(from_mirror);
|
|
const char * from_name = from_class->external_name();
|
|
|
|
oop mirror = JNIHandles::resolve_non_null(result);
|
|
Klass* to_class = java_lang_Class::as_Klass(mirror);
|
|
const char * to = to_class->external_name();
|
|
tty->print("RESOLVE %s %s (verification)\n", from_name, to);
|
|
}
|
|
|
|
return result;
|
|
JVM_END
|
|
|
|
static void is_lock_held_by_thread(Handle loader, PerfCounter* counter, TRAPS) {
|
|
if (loader.is_null()) {
|
|
return;
|
|
}
|
|
|
|
// check whether the current caller thread holds the lock or not.
|
|
// If not, increment the corresponding counter
|
|
if (ObjectSynchronizer::query_lock_ownership((JavaThread*)THREAD, loader) !=
|
|
ObjectSynchronizer::owner_self) {
|
|
counter->inc();
|
|
}
|
|
}
|
|
|
|
// common code for JVM_DefineClass() and JVM_DefineClassWithSource()
|
|
// and JVM_DefineClassWithSourceCond()
|
|
static jclass jvm_define_class_common(JNIEnv *env, const char *name,
|
|
jobject loader, const jbyte *buf,
|
|
jsize len, jobject pd, const char *source,
|
|
jboolean verify, TRAPS) {
|
|
if (source == NULL) source = "__JVM_DefineClass__";
|
|
|
|
assert(THREAD->is_Java_thread(), "must be a JavaThread");
|
|
JavaThread* jt = (JavaThread*) THREAD;
|
|
|
|
PerfClassTraceTime vmtimer(ClassLoader::perf_define_appclass_time(),
|
|
ClassLoader::perf_define_appclass_selftime(),
|
|
ClassLoader::perf_define_appclasses(),
|
|
jt->get_thread_stat()->perf_recursion_counts_addr(),
|
|
jt->get_thread_stat()->perf_timers_addr(),
|
|
PerfClassTraceTime::DEFINE_CLASS);
|
|
|
|
if (UsePerfData) {
|
|
ClassLoader::perf_app_classfile_bytes_read()->inc(len);
|
|
}
|
|
|
|
// Since exceptions can be thrown, class initialization can take place
|
|
// if name is NULL no check for class name in .class stream has to be made.
|
|
TempNewSymbol class_name = NULL;
|
|
if (name != NULL) {
|
|
const int str_len = (int)strlen(name);
|
|
if (str_len > Symbol::max_length()) {
|
|
// It's impossible to create this class; the name cannot fit
|
|
// into the constant pool.
|
|
THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
|
|
}
|
|
class_name = SymbolTable::new_symbol(name, str_len, CHECK_NULL);
|
|
}
|
|
|
|
ResourceMark rm(THREAD);
|
|
ClassFileStream st((u1*) buf, len, (char *)source);
|
|
Handle class_loader (THREAD, JNIHandles::resolve(loader));
|
|
if (UsePerfData) {
|
|
is_lock_held_by_thread(class_loader,
|
|
ClassLoader::sync_JVMDefineClassLockFreeCounter(),
|
|
THREAD);
|
|
}
|
|
Handle protection_domain (THREAD, JNIHandles::resolve(pd));
|
|
Klass* k = SystemDictionary::resolve_from_stream(class_name, class_loader,
|
|
protection_domain, &st,
|
|
verify != 0,
|
|
CHECK_NULL);
|
|
|
|
if (TraceClassResolution && k != NULL) {
|
|
trace_class_resolution(k);
|
|
}
|
|
|
|
return (jclass) JNIHandles::make_local(env, k->java_mirror());
|
|
}
|
|
|
|
|
|
JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd))
|
|
JVMWrapper2("JVM_DefineClass %s", name);
|
|
|
|
return jvm_define_class_common(env, name, loader, buf, len, pd, NULL, true, THREAD);
|
|
JVM_END
|
|
|
|
|
|
JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source))
|
|
JVMWrapper2("JVM_DefineClassWithSource %s", name);
|
|
|
|
return jvm_define_class_common(env, name, loader, buf, len, pd, source, true, THREAD);
|
|
JVM_END
|
|
|
|
JVM_ENTRY(jclass, JVM_DefineClassWithSourceCond(JNIEnv *env, const char *name,
|
|
jobject loader, const jbyte *buf,
|
|
jsize len, jobject pd,
|
|
const char *source, jboolean verify))
|
|
JVMWrapper2("JVM_DefineClassWithSourceCond %s", name);
|
|
|
|
return jvm_define_class_common(env, name, loader, buf, len, pd, source, verify, THREAD);
|
|
JVM_END
|
|
|
|
JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name))
|
|
JVMWrapper("JVM_FindLoadedClass");
|
|
ResourceMark rm(THREAD);
|
|
|
|
Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
|
|
Handle string = java_lang_String::internalize_classname(h_name, CHECK_NULL);
|
|
|
|
const char* str = java_lang_String::as_utf8_string(string());
|
|
// Sanity check, don't expect null
|
|
if (str == NULL) return NULL;
|
|
|
|
const int str_len = (int)strlen(str);
|
|
if (str_len > Symbol::max_length()) {
|
|
// It's impossible to create this class; the name cannot fit
|
|
// into the constant pool.
|
|
return NULL;
|
|
}
|
|
TempNewSymbol klass_name = SymbolTable::new_symbol(str, str_len, CHECK_NULL);
|
|
|
|
// Security Note:
|
|
// The Java level wrapper will perform the necessary security check allowing
|
|
// us to pass the NULL as the initiating class loader.
|
|
Handle h_loader(THREAD, JNIHandles::resolve(loader));
|
|
if (UsePerfData) {
|
|
is_lock_held_by_thread(h_loader,
|
|
ClassLoader::sync_JVMFindLoadedClassLockFreeCounter(),
|
|
THREAD);
|
|
}
|
|
|
|
Klass* k = SystemDictionary::find_instance_or_array_klass(klass_name,
|
|
h_loader,
|
|
Handle(),
|
|
CHECK_NULL);
|
|
#if INCLUDE_CDS
|
|
if (k == NULL) {
|
|
// If the class is not already loaded, try to see if it's in the shared
|
|
// archive for the current classloader (h_loader).
|
|
instanceKlassHandle ik = SystemDictionaryShared::find_or_load_shared_class(
|
|
klass_name, h_loader, CHECK_NULL);
|
|
k = ik();
|
|
}
|
|
#endif
|
|
return (k == NULL) ? NULL :
|
|
(jclass) JNIHandles::make_local(env, k->java_mirror());
|
|
JVM_END
|
|
|
|
|
|
// Reflection support //////////////////////////////////////////////////////////////////////////////
|
|
|
|
JVM_ENTRY(jstring, JVM_GetClassName(JNIEnv *env, jclass cls))
|
|
assert (cls != NULL, "illegal class");
|
|
JVMWrapper("JVM_GetClassName");
|
|
JvmtiVMObjectAllocEventCollector oam;
|
|
ResourceMark rm(THREAD);
|
|
const char* name;
|
|
if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
|
|
name = type2name(java_lang_Class::primitive_type(JNIHandles::resolve(cls)));
|
|
} else {
|
|
// Consider caching interned string in Klass
|
|
Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
|
|
assert(k->is_klass(), "just checking");
|
|
name = k->external_name();
|
|
}
|
|
oop result = StringTable::intern((char*) name, CHECK_NULL);
|
|
return (jstring) JNIHandles::make_local(env, result);
|
|
JVM_END
|
|
|
|
|
|
JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls))
|
|
JVMWrapper("JVM_GetClassInterfaces");
|
|
JvmtiVMObjectAllocEventCollector oam;
|
|
oop mirror = JNIHandles::resolve_non_null(cls);
|
|
|
|
// Special handling for primitive objects
|
|
if (java_lang_Class::is_primitive(mirror)) {
|
|
// Primitive objects does not have any interfaces
|
|
objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
|
|
return (jobjectArray) JNIHandles::make_local(env, r);
|
|
}
|
|
|
|
KlassHandle klass(thread, java_lang_Class::as_Klass(mirror));
|
|
// Figure size of result array
|
|
int size;
|
|
if (klass->oop_is_instance()) {
|
|
size = InstanceKlass::cast(klass())->local_interfaces()->length();
|
|
} else {
|
|
assert(klass->oop_is_objArray() || klass->oop_is_typeArray(), "Illegal mirror klass");
|
|
size = 2;
|
|
}
|
|
|
|
// Allocate result array
|
|
objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), size, CHECK_NULL);
|
|
objArrayHandle result (THREAD, r);
|
|
// Fill in result
|
|
if (klass->oop_is_instance()) {
|
|
// Regular instance klass, fill in all local interfaces
|
|
for (int index = 0; index < size; index++) {
|
|
Klass* k = InstanceKlass::cast(klass())->local_interfaces()->at(index);
|
|
result->obj_at_put(index, k->java_mirror());
|
|
}
|
|
} else {
|
|
// All arrays implement java.lang.Cloneable and java.io.Serializable
|
|
result->obj_at_put(0, SystemDictionary::Cloneable_klass()->java_mirror());
|
|
result->obj_at_put(1, SystemDictionary::Serializable_klass()->java_mirror());
|
|
}
|
|
return (jobjectArray) JNIHandles::make_local(env, result());
|
|
JVM_END
|
|
|
|
|
|
JVM_QUICK_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls))
|
|
JVMWrapper("JVM_IsInterface");
|
|
oop mirror = JNIHandles::resolve_non_null(cls);
|
|
if (java_lang_Class::is_primitive(mirror)) {
|
|
return JNI_FALSE;
|
|
}
|
|
Klass* k = java_lang_Class::as_Klass(mirror);
|
|
jboolean result = k->is_interface();
|
|
assert(!result || k->oop_is_instance(),
|
|
"all interfaces are instance types");
|
|
// The compiler intrinsic for isInterface tests the
|
|
// Klass::_access_flags bits in the same way.
|
|
return result;
|
|
JVM_END
|
|
|
|
|
|
JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls))
|
|
JVMWrapper("JVM_GetClassSigners");
|
|
JvmtiVMObjectAllocEventCollector oam;
|
|
if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
|
|
// There are no signers for primitive types
|
|
return NULL;
|
|
}
|
|
|
|
objArrayOop signers = java_lang_Class::signers(JNIHandles::resolve_non_null(cls));
|
|
|
|
// If there are no signers set in the class, or if the class
|
|
// is an array, return NULL.
|
|
if (signers == NULL) return NULL;
|
|
|
|
// copy of the signers array
|
|
Klass* element = ObjArrayKlass::cast(signers->klass())->element_klass();
|
|
objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL);
|
|
for (int index = 0; index < signers->length(); index++) {
|
|
signers_copy->obj_at_put(index, signers->obj_at(index));
|
|
}
|
|
|
|
// return the copy
|
|
return (jobjectArray) JNIHandles::make_local(env, signers_copy);
|
|
JVM_END
|
|
|
|
|
|
JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers))
|
|
JVMWrapper("JVM_SetClassSigners");
|
|
if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
|
|
// This call is ignored for primitive types and arrays.
|
|
// Signers are only set once, ClassLoader.java, and thus shouldn't
|
|
// be called with an array. Only the bootstrap loader creates arrays.
|
|
Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
|
|
if (k->oop_is_instance()) {
|
|
java_lang_Class::set_signers(k->java_mirror(), objArrayOop(JNIHandles::resolve(signers)));
|
|
}
|
|
}
|
|
JVM_END
|
|
|
|
|
|
JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls))
|
|
JVMWrapper("JVM_GetProtectionDomain");
|
|
if (JNIHandles::resolve(cls) == NULL) {
|
|
THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
|
|
}
|
|
|
|
if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
|
|
// Primitive types does not have a protection domain.
|
|
return NULL;
|
|
}
|
|
|
|
oop pd = java_lang_Class::protection_domain(JNIHandles::resolve(cls));
|
|
return (jobject) JNIHandles::make_local(env, pd);
|
|
JVM_END
|
|
|
|
|
|
static bool is_authorized(Handle context, instanceKlassHandle klass, TRAPS) {
|
|
// If there is a security manager and protection domain, check the access
|
|
// in the protection domain, otherwise it is authorized.
|
|
if (java_lang_System::has_security_manager()) {
|
|
|
|
// For bootstrapping, if pd implies method isn't in the JDK, allow
|
|
// this context to revert to older behavior.
|
|
// In this case the isAuthorized field in AccessControlContext is also not
|
|
// present.
|
|
if (Universe::protection_domain_implies_method() == NULL) {
|
|
return true;
|
|
}
|
|
|
|
// Whitelist certain access control contexts
|
|
if (java_security_AccessControlContext::is_authorized(context)) {
|
|
return true;
|
|
}
|
|
|
|
oop prot = klass->protection_domain();
|
|
if (prot != NULL) {
|
|
// Call pd.implies(new SecurityPermission("createAccessControlContext"))
|
|
// in the new wrapper.
|
|
methodHandle m(THREAD, Universe::protection_domain_implies_method());
|
|
Handle h_prot(THREAD, prot);
|
|
JavaValue result(T_BOOLEAN);
|
|
JavaCallArguments args(h_prot);
|
|
JavaCalls::call(&result, m, &args, CHECK_false);
|
|
return (result.get_jboolean() != 0);
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
// Create an AccessControlContext with a protection domain with null codesource
|
|
// and null permissions - which gives no permissions.
|
|
oop create_dummy_access_control_context(TRAPS) {
|
|
InstanceKlass* pd_klass = InstanceKlass::cast(SystemDictionary::ProtectionDomain_klass());
|
|
Handle obj = pd_klass->allocate_instance_handle(CHECK_NULL);
|
|
// Call constructor ProtectionDomain(null, null);
|
|
JavaValue result(T_VOID);
|
|
JavaCalls::call_special(&result, obj, KlassHandle(THREAD, pd_klass),
|
|
vmSymbols::object_initializer_name(),
|
|
vmSymbols::codesource_permissioncollection_signature(),
|
|
Handle(), Handle(), CHECK_NULL);
|
|
|
|
// new ProtectionDomain[] {pd};
|
|
objArrayOop context = oopFactory::new_objArray(pd_klass, 1, CHECK_NULL);
|
|
context->obj_at_put(0, obj());
|
|
|
|
// new AccessControlContext(new ProtectionDomain[] {pd})
|
|
objArrayHandle h_context(THREAD, context);
|
|
oop acc = java_security_AccessControlContext::create(h_context, false, Handle(), CHECK_NULL);
|
|
return acc;
|
|
}
|
|
|
|
JVM_ENTRY(jobject, JVM_DoPrivileged(JNIEnv *env, jclass cls, jobject action, jobject context, jboolean wrapException))
|
|
JVMWrapper("JVM_DoPrivileged");
|
|
|
|
if (action == NULL) {
|
|
THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), "Null action");
|
|
}
|
|
|
|
// Compute the frame initiating the do privileged operation and setup the privileged stack
|
|
vframeStream vfst(thread);
|
|
vfst.security_get_caller_frame(1);
|
|
|
|
if (vfst.at_end()) {
|
|
THROW_MSG_0(vmSymbols::java_lang_InternalError(), "no caller?");
|
|
}
|
|
|
|
Method* method = vfst.method();
|
|
instanceKlassHandle klass (THREAD, method->method_holder());
|
|
|
|
// Check that action object understands "Object run()"
|
|
Handle h_context;
|
|
if (context != NULL) {
|
|
h_context = Handle(THREAD, JNIHandles::resolve(context));
|
|
bool authorized = is_authorized(h_context, klass, CHECK_NULL);
|
|
if (!authorized) {
|
|
// Create an unprivileged access control object and call it's run function
|
|
// instead.
|
|
oop noprivs = create_dummy_access_control_context(CHECK_NULL);
|
|
h_context = Handle(THREAD, noprivs);
|
|
}
|
|
}
|
|
|
|
// Check that action object understands "Object run()"
|
|
Handle object (THREAD, JNIHandles::resolve(action));
|
|
|
|
// get run() method
|
|
Method* m_oop = object->klass()->uncached_lookup_method(
|
|
vmSymbols::run_method_name(),
|
|
vmSymbols::void_object_signature(),
|
|
Klass::find_overpass);
|
|
methodHandle m (THREAD, m_oop);
|
|
if (m.is_null() || !m->is_method() || !m()->is_public() || m()->is_static()) {
|
|
THROW_MSG_0(vmSymbols::java_lang_InternalError(), "No run method");
|
|
}
|
|
|
|
// Stack allocated list of privileged stack elements
|
|
PrivilegedElement pi;
|
|
if (!vfst.at_end()) {
|
|
pi.initialize(&vfst, h_context(), thread->privileged_stack_top(), CHECK_NULL);
|
|
thread->set_privileged_stack_top(&pi);
|
|
}
|
|
|
|
|
|
// invoke the Object run() in the action object. We cannot use call_interface here, since the static type
|
|
// is not really known - it is either java.security.PrivilegedAction or java.security.PrivilegedExceptionAction
|
|
Handle pending_exception;
|
|
JavaValue result(T_OBJECT);
|
|
JavaCallArguments args(object);
|
|
JavaCalls::call(&result, m, &args, THREAD);
|
|
|
|
// done with action, remove ourselves from the list
|
|
if (!vfst.at_end()) {
|
|
assert(thread->privileged_stack_top() != NULL && thread->privileged_stack_top() == &pi, "wrong top element");
|
|
thread->set_privileged_stack_top(thread->privileged_stack_top()->next());
|
|
}
|
|
|
|
if (HAS_PENDING_EXCEPTION) {
|
|
pending_exception = Handle(THREAD, PENDING_EXCEPTION);
|
|
CLEAR_PENDING_EXCEPTION;
|
|
// JVMTI has already reported the pending exception
|
|
// JVMTI internal flag reset is needed in order to report PrivilegedActionException
|
|
if (THREAD->is_Java_thread()) {
|
|
JvmtiExport::clear_detected_exception((JavaThread*) THREAD);
|
|
}
|
|
if ( pending_exception->is_a(SystemDictionary::Exception_klass()) &&
|
|
!pending_exception->is_a(SystemDictionary::RuntimeException_klass())) {
|
|
// Throw a java.security.PrivilegedActionException(Exception e) exception
|
|
JavaCallArguments args(pending_exception);
|
|
THROW_ARG_0(vmSymbols::java_security_PrivilegedActionException(),
|
|
vmSymbols::exception_void_signature(),
|
|
&args);
|
|
}
|
|
}
|
|
|
|
if (pending_exception.not_null()) THROW_OOP_0(pending_exception());
|
|
return JNIHandles::make_local(env, (oop) result.get_jobject());
|
|
JVM_END
|
|
|
|
|
|
// Returns the inherited_access_control_context field of the running thread.
|
|
JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls))
|
|
JVMWrapper("JVM_GetInheritedAccessControlContext");
|
|
oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj());
|
|
return JNIHandles::make_local(env, result);
|
|
JVM_END
|
|
|
|
class RegisterArrayForGC {
|
|
private:
|
|
JavaThread *_thread;
|
|
public:
|
|
RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array) {
|
|
_thread = thread;
|
|
_thread->register_array_for_gc(array);
|
|
}
|
|
|
|
~RegisterArrayForGC() {
|
|
_thread->register_array_for_gc(NULL);
|
|
}
|
|
};
|
|
|
|
|
|
JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls))
|
|
JVMWrapper("JVM_GetStackAccessControlContext");
|
|
if (!UsePrivilegedStack) return NULL;
|
|
|
|
ResourceMark rm(THREAD);
|
|
GrowableArray<oop>* local_array = new GrowableArray<oop>(12);
|
|
JvmtiVMObjectAllocEventCollector oam;
|
|
|
|
// count the protection domains on the execution stack. We collapse
|
|
// duplicate consecutive protection domains into a single one, as
|
|
// well as stopping when we hit a privileged frame.
|
|
|
|
// Use vframeStream to iterate through Java frames
|
|
vframeStream vfst(thread);
|
|
|
|
oop previous_protection_domain = NULL;
|
|
Handle privileged_context(thread, NULL);
|
|
bool is_privileged = false;
|
|
oop protection_domain = NULL;
|
|
|
|
for(; !vfst.at_end(); vfst.next()) {
|
|
// get method of frame
|
|
Method* method = vfst.method();
|
|
intptr_t* frame_id = vfst.frame_id();
|
|
|
|
// check the privileged frames to see if we have a match
|
|
if (thread->privileged_stack_top() && thread->privileged_stack_top()->frame_id() == frame_id) {
|
|
// this frame is privileged
|
|
is_privileged = true;
|
|
privileged_context = Handle(thread, thread->privileged_stack_top()->privileged_context());
|
|
protection_domain = thread->privileged_stack_top()->protection_domain();
|
|
} else {
|
|
protection_domain = method->method_holder()->protection_domain();
|
|
}
|
|
|
|
if ((previous_protection_domain != protection_domain) && (protection_domain != NULL)) {
|
|
local_array->push(protection_domain);
|
|
previous_protection_domain = protection_domain;
|
|
}
|
|
|
|
if (is_privileged) break;
|
|
}
|
|
|
|
|
|
// either all the domains on the stack were system domains, or
|
|
// we had a privileged system domain
|
|
if (local_array->is_empty()) {
|
|
if (is_privileged && privileged_context.is_null()) return NULL;
|
|
|
|
oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL);
|
|
return JNIHandles::make_local(env, result);
|
|
}
|
|
|
|
// the resource area must be registered in case of a gc
|
|
RegisterArrayForGC ragc(thread, local_array);
|
|
objArrayOop context = oopFactory::new_objArray(SystemDictionary::ProtectionDomain_klass(),
|
|
local_array->length(), CHECK_NULL);
|
|
objArrayHandle h_context(thread, context);
|
|
for (int index = 0; index < local_array->length(); index++) {
|
|
h_context->obj_at_put(index, local_array->at(index));
|
|
}
|
|
|
|
oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL);
|
|
|
|
return JNIHandles::make_local(env, result);
|
|
JVM_END
|
|
|
|
|
|
JVM_QUICK_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls))
|
|
JVMWrapper("JVM_IsArrayClass");
|
|
Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
|
|
return (k != NULL) && k->oop_is_array() ? true : false;
|
|
JVM_END
|
|
|
|
|
|
JVM_QUICK_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls))
|
|
JVMWrapper("JVM_IsPrimitiveClass");
|
|
oop mirror = JNIHandles::resolve_non_null(cls);
|
|
return (jboolean) java_lang_Class::is_primitive(mirror);
|
|
JVM_END
|
|
|
|
|
|
JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls))
|
|
JVMWrapper("JVM_GetClassModifiers");
|
|
if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
|
|
// Primitive type
|
|
return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
|
|
}
|
|
|
|
Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
|
|
debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0));
|
|
assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK");
|
|
return k->modifier_flags();
|
|
JVM_END
|
|
|
|
|
|
// Inner class reflection ///////////////////////////////////////////////////////////////////////////////
|
|
|
|
JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass))
|
|
JvmtiVMObjectAllocEventCollector oam;
|
|
// ofClass is a reference to a java_lang_Class object. The mirror object
|
|
// of an InstanceKlass
|
|
|
|
if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
|
|
! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) {
|
|
oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
|
|
return (jobjectArray)JNIHandles::make_local(env, result);
|
|
}
|
|
|
|
instanceKlassHandle k(thread, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
|
|
InnerClassesIterator iter(k);
|
|
|
|
if (iter.length() == 0) {
|
|
// Neither an inner nor outer class
|
|
oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
|
|
return (jobjectArray)JNIHandles::make_local(env, result);
|
|
}
|
|
|
|
// find inner class info
|
|
constantPoolHandle cp(thread, k->constants());
|
|
int length = iter.length();
|
|
|
|
// Allocate temp. result array
|
|
objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), length/4, CHECK_NULL);
|
|
objArrayHandle result (THREAD, r);
|
|
int members = 0;
|
|
|
|
for (; !iter.done(); iter.next()) {
|
|
int ioff = iter.inner_class_info_index();
|
|
int ooff = iter.outer_class_info_index();
|
|
|
|
if (ioff != 0 && ooff != 0) {
|
|
// Check to see if the name matches the class we're looking for
|
|
// before attempting to find the class.
|
|
if (cp->klass_name_at_matches(k, ooff)) {
|
|
Klass* outer_klass = cp->klass_at(ooff, CHECK_NULL);
|
|
if (outer_klass == k()) {
|
|
Klass* ik = cp->klass_at(ioff, CHECK_NULL);
|
|
instanceKlassHandle inner_klass (THREAD, ik);
|
|
|
|
// Throws an exception if outer klass has not declared k as
|
|
// an inner klass
|
|
Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL);
|
|
|
|
result->obj_at_put(members, inner_klass->java_mirror());
|
|
members++;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (members != length) {
|
|
// Return array of right length
|
|
objArrayOop res = oopFactory::new_objArray(SystemDictionary::Class_klass(), members, CHECK_NULL);
|
|
for(int i = 0; i < members; i++) {
|
|
res->obj_at_put(i, result->obj_at(i));
|
|
}
|
|
return (jobjectArray)JNIHandles::make_local(env, res);
|
|
}
|
|
|
|
return (jobjectArray)JNIHandles::make_local(env, result());
|
|
JVM_END
|
|
|
|
|
|
JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass))
|
|
{
|
|
// ofClass is a reference to a java_lang_Class object.
|
|
if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
|
|
! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) {
|
|
return NULL;
|
|
}
|
|
|
|
bool inner_is_member = false;
|
|
Klass* outer_klass
|
|
= InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))
|
|
)->compute_enclosing_class(&inner_is_member, CHECK_NULL);
|
|
if (outer_klass == NULL) return NULL; // already a top-level class
|
|
if (!inner_is_member) return NULL; // an anonymous class (inside a method)
|
|
return (jclass) JNIHandles::make_local(env, outer_klass->java_mirror());
|
|
}
|
|
JVM_END
|
|
|
|
// should be in InstanceKlass.cpp, but is here for historical reasons
|
|
Klass* InstanceKlass::compute_enclosing_class_impl(instanceKlassHandle k,
|
|
bool* inner_is_member,
|
|
TRAPS) {
|
|
Thread* thread = THREAD;
|
|
InnerClassesIterator iter(k);
|
|
if (iter.length() == 0) {
|
|
// No inner class info => no declaring class
|
|
return NULL;
|
|
}
|
|
|
|
constantPoolHandle i_cp(thread, k->constants());
|
|
|
|
bool found = false;
|
|
Klass* ok;
|
|
instanceKlassHandle outer_klass;
|
|
*inner_is_member = false;
|
|
|
|
// Find inner_klass attribute
|
|
for (; !iter.done() && !found; iter.next()) {
|
|
int ioff = iter.inner_class_info_index();
|
|
int ooff = iter.outer_class_info_index();
|
|
int noff = iter.inner_name_index();
|
|
if (ioff != 0) {
|
|
// Check to see if the name matches the class we're looking for
|
|
// before attempting to find the class.
|
|
if (i_cp->klass_name_at_matches(k, ioff)) {
|
|
Klass* inner_klass = i_cp->klass_at(ioff, CHECK_NULL);
|
|
found = (k() == inner_klass);
|
|
if (found && ooff != 0) {
|
|
ok = i_cp->klass_at(ooff, CHECK_NULL);
|
|
outer_klass = instanceKlassHandle(thread, ok);
|
|
*inner_is_member = true;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (found && outer_klass.is_null()) {
|
|
// It may be anonymous; try for that.
|
|
int encl_method_class_idx = k->enclosing_method_class_index();
|
|
if (encl_method_class_idx != 0) {
|
|
ok = i_cp->klass_at(encl_method_class_idx, CHECK_NULL);
|
|
outer_klass = instanceKlassHandle(thread, ok);
|
|
*inner_is_member = false;
|
|
}
|
|
}
|
|
|
|
// If no inner class attribute found for this class.
|
|
if (outer_klass.is_null()) return NULL;
|
|
|
|
// Throws an exception if outer klass has not declared k as an inner klass
|
|
// We need evidence that each klass knows about the other, or else
|
|
// the system could allow a spoof of an inner class to gain access rights.
|
|
Reflection::check_for_inner_class(outer_klass, k, *inner_is_member, CHECK_NULL);
|
|
return outer_klass();
|
|
}
|
|
|
|
JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls))
|
|
assert (cls != NULL, "illegal class");
|
|
JVMWrapper("JVM_GetClassSignature");
|
|
JvmtiVMObjectAllocEventCollector oam;
|
|
ResourceMark rm(THREAD);
|
|
// Return null for arrays and primatives
|
|
if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
|
|
Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
|
|
if (k->oop_is_instance()) {
|
|
Symbol* sym = InstanceKlass::cast(k)->generic_signature();
|
|
if (sym == NULL) return NULL;
|
|
Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
|
|
return (jstring) JNIHandles::make_local(env, str());
|
|
}
|
|
}
|
|
return NULL;
|
|
JVM_END
|
|
|
|
|
|
JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls))
|
|
assert (cls != NULL, "illegal class");
|
|
JVMWrapper("JVM_GetClassAnnotations");
|
|
|
|
// Return null for arrays and primitives
|
|
if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
|
|
Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
|
|
if (k->oop_is_instance()) {
|
|
typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->class_annotations(), CHECK_NULL);
|
|
return (jbyteArray) JNIHandles::make_local(env, a);
|
|
}
|
|
}
|
|
return NULL;
|
|
JVM_END
|
|
|
|
|
|
static bool jvm_get_field_common(jobject field, fieldDescriptor& fd, TRAPS) {
|
|
// some of this code was adapted from from jni_FromReflectedField
|
|
|
|
oop reflected = JNIHandles::resolve_non_null(field);
|
|
oop mirror = java_lang_reflect_Field::clazz(reflected);
|
|
Klass* k = java_lang_Class::as_Klass(mirror);
|
|
int slot = java_lang_reflect_Field::slot(reflected);
|
|
int modifiers = java_lang_reflect_Field::modifiers(reflected);
|
|
|
|
KlassHandle kh(THREAD, k);
|
|
intptr_t offset = InstanceKlass::cast(kh())->field_offset(slot);
|
|
|
|
if (modifiers & JVM_ACC_STATIC) {
|
|
// for static fields we only look in the current class
|
|
if (!InstanceKlass::cast(kh())->find_local_field_from_offset(offset, true, &fd)) {
|
|
assert(false, "cannot find static field");
|
|
return false;
|
|
}
|
|
} else {
|
|
// for instance fields we start with the current class and work
|
|
// our way up through the superclass chain
|
|
if (!InstanceKlass::cast(kh())->find_field_from_offset(offset, false, &fd)) {
|
|
assert(false, "cannot find instance field");
|
|
return false;
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
static Method* jvm_get_method_common(jobject method) {
|
|
// some of this code was adapted from from jni_FromReflectedMethod
|
|
|
|
oop reflected = JNIHandles::resolve_non_null(method);
|
|
oop mirror = NULL;
|
|
int slot = 0;
|
|
|
|
if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
|
|
mirror = java_lang_reflect_Constructor::clazz(reflected);
|
|
slot = java_lang_reflect_Constructor::slot(reflected);
|
|
} else {
|
|
assert(reflected->klass() == SystemDictionary::reflect_Method_klass(),
|
|
"wrong type");
|
|
mirror = java_lang_reflect_Method::clazz(reflected);
|
|
slot = java_lang_reflect_Method::slot(reflected);
|
|
}
|
|
Klass* k = java_lang_Class::as_Klass(mirror);
|
|
|
|
Method* m = InstanceKlass::cast(k)->method_with_idnum(slot);
|
|
assert(m != NULL, "cannot find method");
|
|
return m; // caller has to deal with NULL in product mode
|
|
}
|
|
|
|
/* Type use annotations support (JDK 1.8) */
|
|
|
|
JVM_ENTRY(jbyteArray, JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls))
|
|
assert (cls != NULL, "illegal class");
|
|
JVMWrapper("JVM_GetClassTypeAnnotations");
|
|
ResourceMark rm(THREAD);
|
|
// Return null for arrays and primitives
|
|
if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
|
|
Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
|
|
if (k->oop_is_instance()) {
|
|
AnnotationArray* type_annotations = InstanceKlass::cast(k)->class_type_annotations();
|
|
if (type_annotations != NULL) {
|
|
typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
|
|
return (jbyteArray) JNIHandles::make_local(env, a);
|
|
}
|
|
}
|
|
}
|
|
return NULL;
|
|
JVM_END
|
|
|
|
JVM_ENTRY(jbyteArray, JVM_GetMethodTypeAnnotations(JNIEnv *env, jobject method))
|
|
assert (method != NULL, "illegal method");
|
|
JVMWrapper("JVM_GetMethodTypeAnnotations");
|
|
|
|
// method is a handle to a java.lang.reflect.Method object
|
|
Method* m = jvm_get_method_common(method);
|
|
if (m == NULL) {
|
|
return NULL;
|
|
}
|
|
|
|
AnnotationArray* type_annotations = m->type_annotations();
|
|
if (type_annotations != NULL) {
|
|
typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
|
|
return (jbyteArray) JNIHandles::make_local(env, a);
|
|
}
|
|
|
|
return NULL;
|
|
JVM_END
|
|
|
|
JVM_ENTRY(jbyteArray, JVM_GetFieldTypeAnnotations(JNIEnv *env, jobject field))
|
|
assert (field != NULL, "illegal field");
|
|
JVMWrapper("JVM_GetFieldTypeAnnotations");
|
|
|
|
fieldDescriptor fd;
|
|
bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL);
|
|
if (!gotFd) {
|
|
return NULL;
|
|
}
|
|
|
|
return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.type_annotations(), THREAD));
|
|
JVM_END
|
|
|
|
static void bounds_check(constantPoolHandle cp, jint index, TRAPS) {
|
|
if (!cp->is_within_bounds(index)) {
|
|
THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds");
|
|
}
|
|
}
|
|
|
|
JVM_ENTRY(jobjectArray, JVM_GetMethodParameters(JNIEnv *env, jobject method))
|
|
{
|
|
JVMWrapper("JVM_GetMethodParameters");
|
|
// method is a handle to a java.lang.reflect.Method object
|
|
Method* method_ptr = jvm_get_method_common(method);
|
|
methodHandle mh (THREAD, method_ptr);
|
|
Handle reflected_method (THREAD, JNIHandles::resolve_non_null(method));
|
|
const int num_params = mh->method_parameters_length();
|
|
|
|
if (num_params < 0) {
|
|
// A -1 return value from method_parameters_length means there is no
|
|
// parameter data. Return null to indicate this to the reflection
|
|
// API.
|
|
assert(num_params == -1, "num_params should be -1 if it is less than zero");
|
|
return (jobjectArray)NULL;
|
|
} else {
|
|
// Otherwise, we return something up to reflection, even if it is
|
|
// a zero-length array. Why? Because in some cases this can
|
|
// trigger a MalformedParametersException.
|
|
|
|
// make sure all the symbols are properly formatted
|
|
for (int i = 0; i < num_params; i++) {
|
|
MethodParametersElement* params = mh->method_parameters_start();
|
|
int index = params[i].name_cp_index;
|
|
bounds_check(mh->constants(), index, CHECK_NULL);
|
|
|
|
if (0 != index && !mh->constants()->tag_at(index).is_utf8()) {
|
|
THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
|
|
"Wrong type at constant pool index");
|
|
}
|
|
|
|
}
|
|
|
|
objArrayOop result_oop = oopFactory::new_objArray(SystemDictionary::reflect_Parameter_klass(), num_params, CHECK_NULL);
|
|
objArrayHandle result (THREAD, result_oop);
|
|
|
|
for (int i = 0; i < num_params; i++) {
|
|
MethodParametersElement* params = mh->method_parameters_start();
|
|
// For a 0 index, give a NULL symbol
|
|
Symbol* sym = 0 != params[i].name_cp_index ?
|
|
mh->constants()->symbol_at(params[i].name_cp_index) : NULL;
|
|
int flags = params[i].flags;
|
|
oop param = Reflection::new_parameter(reflected_method, i, sym,
|
|
flags, CHECK_NULL);
|
|
result->obj_at_put(i, param);
|
|
}
|
|
return (jobjectArray)JNIHandles::make_local(env, result());
|
|
}
|
|
}
|
|
JVM_END
|
|
|
|
// New (JDK 1.4) reflection implementation /////////////////////////////////////
|
|
|
|
JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly))
|
|
{
|
|
JVMWrapper("JVM_GetClassDeclaredFields");
|
|
JvmtiVMObjectAllocEventCollector oam;
|
|
|
|
// Exclude primitive types and array types
|
|
if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
|
|
java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) {
|
|
// Return empty array
|
|
oop res = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), 0, CHECK_NULL);
|
|
return (jobjectArray) JNIHandles::make_local(env, res);
|
|
}
|
|
|
|
instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
|
|
constantPoolHandle cp(THREAD, k->constants());
|
|
|
|
// Ensure class is linked
|
|
k->link_class(CHECK_NULL);
|
|
|
|
// 4496456 We need to filter out java.lang.Throwable.backtrace
|
|
bool skip_backtrace = false;
|
|
|
|
// Allocate result
|
|
int num_fields;
|
|
|
|
if (publicOnly) {
|
|
num_fields = 0;
|
|
for (JavaFieldStream fs(k()); !fs.done(); fs.next()) {
|
|
if (fs.access_flags().is_public()) ++num_fields;
|
|
}
|
|
} else {
|
|
num_fields = k->java_fields_count();
|
|
|
|
if (k() == SystemDictionary::Throwable_klass()) {
|
|
num_fields--;
|
|
skip_backtrace = true;
|
|
}
|
|
}
|
|
|
|
objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), num_fields, CHECK_NULL);
|
|
objArrayHandle result (THREAD, r);
|
|
|
|
int out_idx = 0;
|
|
fieldDescriptor fd;
|
|
for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
|
|
if (skip_backtrace) {
|
|
// 4496456 skip java.lang.Throwable.backtrace
|
|
int offset = fs.offset();
|
|
if (offset == java_lang_Throwable::get_backtrace_offset()) continue;
|
|
}
|
|
|
|
if (!publicOnly || fs.access_flags().is_public()) {
|
|
fd.reinitialize(k(), fs.index());
|
|
oop field = Reflection::new_field(&fd, CHECK_NULL);
|
|
result->obj_at_put(out_idx, field);
|
|
++out_idx;
|
|
}
|
|
}
|
|
assert(out_idx == num_fields, "just checking");
|
|
return (jobjectArray) JNIHandles::make_local(env, result());
|
|
}
|
|
JVM_END
|
|
|
|
static bool select_method(methodHandle method, bool want_constructor) {
|
|
if (want_constructor) {
|
|
return (method->is_initializer() && !method->is_static());
|
|
} else {
|
|
return (!method->is_initializer() && !method->is_overpass());
|
|
}
|
|
}
|
|
|
|
static jobjectArray get_class_declared_methods_helper(
|
|
JNIEnv *env,
|
|
jclass ofClass, jboolean publicOnly,
|
|
bool want_constructor,
|
|
Klass* klass, TRAPS) {
|
|
|
|
JvmtiVMObjectAllocEventCollector oam;
|
|
|
|
// Exclude primitive types and array types
|
|
if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
|
|
|| java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) {
|
|
// Return empty array
|
|
oop res = oopFactory::new_objArray(klass, 0, CHECK_NULL);
|
|
return (jobjectArray) JNIHandles::make_local(env, res);
|
|
}
|
|
|
|
instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
|
|
|
|
// Ensure class is linked
|
|
k->link_class(CHECK_NULL);
|
|
|
|
Array<Method*>* methods = k->methods();
|
|
int methods_length = methods->length();
|
|
|
|
// Save original method_idnum in case of redefinition, which can change
|
|
// the idnum of obsolete methods. The new method will have the same idnum
|
|
// but if we refresh the methods array, the counts will be wrong.
|
|
ResourceMark rm(THREAD);
|
|
GrowableArray<int>* idnums = new GrowableArray<int>(methods_length);
|
|
int num_methods = 0;
|
|
|
|
for (int i = 0; i < methods_length; i++) {
|
|
methodHandle method(THREAD, methods->at(i));
|
|
if (select_method(method, want_constructor)) {
|
|
if (!publicOnly || method->is_public()) {
|
|
idnums->push(method->method_idnum());
|
|
++num_methods;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Allocate result
|
|
objArrayOop r = oopFactory::new_objArray(klass, num_methods, CHECK_NULL);
|
|
objArrayHandle result (THREAD, r);
|
|
|
|
// Now just put the methods that we selected above, but go by their idnum
|
|
// in case of redefinition. The methods can be redefined at any safepoint,
|
|
// so above when allocating the oop array and below when creating reflect
|
|
// objects.
|
|
for (int i = 0; i < num_methods; i++) {
|
|
methodHandle method(THREAD, k->method_with_idnum(idnums->at(i)));
|
|
if (method.is_null()) {
|
|
// Method may have been deleted and seems this API can handle null
|
|
// Otherwise should probably put a method that throws NSME
|
|
result->obj_at_put(i, NULL);
|
|
} else {
|
|
oop m;
|
|
if (want_constructor) {
|
|
m = Reflection::new_constructor(method, CHECK_NULL);
|
|
} else {
|
|
m = Reflection::new_method(method, false, CHECK_NULL);
|
|
}
|
|
result->obj_at_put(i, m);
|
|
}
|
|
}
|
|
|
|
return (jobjectArray) JNIHandles::make_local(env, result());
|
|
}
|
|
|
|
JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
|
|
{
|
|
JVMWrapper("JVM_GetClassDeclaredMethods");
|
|
return get_class_declared_methods_helper(env, ofClass, publicOnly,
|
|
/*want_constructor*/ false,
|
|
SystemDictionary::reflect_Method_klass(), THREAD);
|
|
}
|
|
JVM_END
|
|
|
|
JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
|
|
{
|
|
JVMWrapper("JVM_GetClassDeclaredConstructors");
|
|
return get_class_declared_methods_helper(env, ofClass, publicOnly,
|
|
/*want_constructor*/ true,
|
|
SystemDictionary::reflect_Constructor_klass(), THREAD);
|
|
}
|
|
JVM_END
|
|
|
|
JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls))
|
|
{
|
|
JVMWrapper("JVM_GetClassAccessFlags");
|
|
if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
|
|
// Primitive type
|
|
return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
|
|
}
|
|
|
|
Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
|
|
return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS;
|
|
}
|
|
JVM_END
|
|
|
|
|
|
// Constant pool access //////////////////////////////////////////////////////////
|
|
|
|
JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
|
|
{
|
|
JVMWrapper("JVM_GetClassConstantPool");
|
|
JvmtiVMObjectAllocEventCollector oam;
|
|
|
|
// Return null for primitives and arrays
|
|
if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
|
|
Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
|
|
if (k->oop_is_instance()) {
|
|
instanceKlassHandle k_h(THREAD, k);
|
|
Handle jcp = sun_reflect_ConstantPool::create(CHECK_NULL);
|
|
sun_reflect_ConstantPool::set_cp(jcp(), k_h->constants());
|
|
return JNIHandles::make_local(jcp());
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
JVM_END
|
|
|
|
|
|
JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject obj, jobject unused))
|
|
{
|
|
JVMWrapper("JVM_ConstantPoolGetSize");
|
|
constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
|
|
return cp->length();
|
|
}
|
|
JVM_END
|
|
|
|
|
|
JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jobject unused, jint index))
|
|
{
|
|
JVMWrapper("JVM_ConstantPoolGetClassAt");
|
|
constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
|
|
bounds_check(cp, index, CHECK_NULL);
|
|
constantTag tag = cp->tag_at(index);
|
|
if (!tag.is_klass() && !tag.is_unresolved_klass()) {
|
|
THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
|
|
}
|
|
Klass* k = cp->klass_at(index, CHECK_NULL);
|
|
return (jclass) JNIHandles::make_local(k->java_mirror());
|
|
}
|
|
JVM_END
|
|
|
|
JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
|
|
{
|
|
JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded");
|
|
constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
|
|
bounds_check(cp, index, CHECK_NULL);
|
|
constantTag tag = cp->tag_at(index);
|
|
if (!tag.is_klass() && !tag.is_unresolved_klass()) {
|
|
THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
|
|
}
|
|
Klass* k = ConstantPool::klass_at_if_loaded(cp, index);
|
|
if (k == NULL) return NULL;
|
|
return (jclass) JNIHandles::make_local(k->java_mirror());
|
|
}
|
|
JVM_END
|
|
|
|
static jobject get_method_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
|
|
constantTag tag = cp->tag_at(index);
|
|
if (!tag.is_method() && !tag.is_interface_method()) {
|
|
THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
|
|
}
|
|
int klass_ref = cp->uncached_klass_ref_index_at(index);
|
|
Klass* k_o;
|
|
if (force_resolution) {
|
|
k_o = cp->klass_at(klass_ref, CHECK_NULL);
|
|
} else {
|
|
k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
|
|
if (k_o == NULL) return NULL;
|
|
}
|
|
instanceKlassHandle k(THREAD, k_o);
|
|
Symbol* name = cp->uncached_name_ref_at(index);
|
|
Symbol* sig = cp->uncached_signature_ref_at(index);
|
|
methodHandle m (THREAD, k->find_method(name, sig));
|
|
if (m.is_null()) {
|
|
THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
|
|
}
|
|
oop method;
|
|
if (!m->is_initializer() || m->is_static()) {
|
|
method = Reflection::new_method(m, true, CHECK_NULL);
|
|
} else {
|
|
method = Reflection::new_constructor(m, CHECK_NULL);
|
|
}
|
|
return JNIHandles::make_local(method);
|
|
}
|
|
|
|
JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jobject unused, jint index))
|
|
{
|
|
JVMWrapper("JVM_ConstantPoolGetMethodAt");
|
|
JvmtiVMObjectAllocEventCollector oam;
|
|
constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
|
|
bounds_check(cp, index, CHECK_NULL);
|
|
jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
|
|
return res;
|
|
}
|
|
JVM_END
|
|
|
|
JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
|
|
{
|
|
JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded");
|
|
JvmtiVMObjectAllocEventCollector oam;
|
|
constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
|
|
bounds_check(cp, index, CHECK_NULL);
|
|
jobject res = get_method_at_helper(cp, index, false, CHECK_NULL);
|
|
return res;
|
|
}
|
|
JVM_END
|
|
|
|
static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
|
|
constantTag tag = cp->tag_at(index);
|
|
if (!tag.is_field()) {
|
|
THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
|
|
}
|
|
int klass_ref = cp->uncached_klass_ref_index_at(index);
|
|
Klass* k_o;
|
|
if (force_resolution) {
|
|
k_o = cp->klass_at(klass_ref, CHECK_NULL);
|
|
} else {
|
|
k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
|
|
if (k_o == NULL) return NULL;
|
|
}
|
|
instanceKlassHandle k(THREAD, k_o);
|
|
Symbol* name = cp->uncached_name_ref_at(index);
|
|
Symbol* sig = cp->uncached_signature_ref_at(index);
|
|
fieldDescriptor fd;
|
|
Klass* target_klass = k->find_field(name, sig, &fd);
|
|
if (target_klass == NULL) {
|
|
THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
|
|
}
|
|
oop field = Reflection::new_field(&fd, CHECK_NULL);
|
|
return JNIHandles::make_local(field);
|
|
}
|
|
|
|
JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject obj, jobject unusedl, jint index))
|
|
{
|
|
JVMWrapper("JVM_ConstantPoolGetFieldAt");
|
|
JvmtiVMObjectAllocEventCollector oam;
|
|
constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
|
|
bounds_check(cp, index, CHECK_NULL);
|
|
jobject res = get_field_at_helper(cp, index, true, CHECK_NULL);
|
|
return res;
|
|
}
|
|
JVM_END
|
|
|
|
JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
|
|
{
|
|
JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded");
|
|
JvmtiVMObjectAllocEventCollector oam;
|
|
constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
|
|
bounds_check(cp, index, CHECK_NULL);
|
|
jobject res = get_field_at_helper(cp, index, false, CHECK_NULL);
|
|
return res;
|
|
}
|
|
JVM_END
|
|
|
|
JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
|
|
{
|
|
JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt");
|
|
JvmtiVMObjectAllocEventCollector oam;
|
|
constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
|
|
bounds_check(cp, index, CHECK_NULL);
|
|
constantTag tag = cp->tag_at(index);
|
|
if (!tag.is_field_or_method()) {
|
|
THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
|
|
}
|
|
int klass_ref = cp->uncached_klass_ref_index_at(index);
|
|
Symbol* klass_name = cp->klass_name_at(klass_ref);
|
|
Symbol* member_name = cp->uncached_name_ref_at(index);
|
|
Symbol* member_sig = cp->uncached_signature_ref_at(index);
|
|
objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 3, CHECK_NULL);
|
|
objArrayHandle dest(THREAD, dest_o);
|
|
Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
|
|
dest->obj_at_put(0, str());
|
|
str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
|
|
dest->obj_at_put(1, str());
|
|
str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
|
|
dest->obj_at_put(2, str());
|
|
return (jobjectArray) JNIHandles::make_local(dest());
|
|
}
|
|
JVM_END
|
|
|
|
JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject obj, jobject unused, jint index))
|
|
{
|
|
JVMWrapper("JVM_ConstantPoolGetIntAt");
|
|
constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
|
|
bounds_check(cp, index, CHECK_0);
|
|
constantTag tag = cp->tag_at(index);
|
|
if (!tag.is_int()) {
|
|
THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
|
|
}
|
|
return cp->int_at(index);
|
|
}
|
|
JVM_END
|
|
|
|
JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject obj, jobject unused, jint index))
|
|
{
|
|
JVMWrapper("JVM_ConstantPoolGetLongAt");
|
|
constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
|
|
bounds_check(cp, index, CHECK_(0L));
|
|
constantTag tag = cp->tag_at(index);
|
|
if (!tag.is_long()) {
|
|
THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
|
|
}
|
|
return cp->long_at(index);
|
|
}
|
|
JVM_END
|
|
|
|
JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject obj, jobject unused, jint index))
|
|
{
|
|
JVMWrapper("JVM_ConstantPoolGetFloatAt");
|
|
constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
|
|
bounds_check(cp, index, CHECK_(0.0f));
|
|
constantTag tag = cp->tag_at(index);
|
|
if (!tag.is_float()) {
|
|
THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
|
|
}
|
|
return cp->float_at(index);
|
|
}
|
|
JVM_END
|
|
|
|
JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject obj, jobject unused, jint index))
|
|
{
|
|
JVMWrapper("JVM_ConstantPoolGetDoubleAt");
|
|
constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
|
|
bounds_check(cp, index, CHECK_(0.0));
|
|
constantTag tag = cp->tag_at(index);
|
|
if (!tag.is_double()) {
|
|
THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
|
|
}
|
|
return cp->double_at(index);
|
|
}
|
|
JVM_END
|
|
|
|
JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject obj, jobject unused, jint index))
|
|
{
|
|
JVMWrapper("JVM_ConstantPoolGetStringAt");
|
|
constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
|
|
bounds_check(cp, index, CHECK_NULL);
|
|
constantTag tag = cp->tag_at(index);
|
|
if (!tag.is_string()) {
|
|
THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
|
|
}
|
|
oop str = cp->string_at(index, CHECK_NULL);
|
|
return (jstring) JNIHandles::make_local(str);
|
|
}
|
|
JVM_END
|
|
|
|
JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject obj, jobject unused, jint index))
|
|
{
|
|
JVMWrapper("JVM_ConstantPoolGetUTF8At");
|
|
JvmtiVMObjectAllocEventCollector oam;
|
|
constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
|
|
bounds_check(cp, index, CHECK_NULL);
|
|
constantTag tag = cp->tag_at(index);
|
|
if (!tag.is_symbol()) {
|
|
THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
|
|
}
|
|
Symbol* sym = cp->symbol_at(index);
|
|
Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
|
|
return (jstring) JNIHandles::make_local(str());
|
|
}
|
|
JVM_END
|
|
|
|
|
|
// Assertion support. //////////////////////////////////////////////////////////
|
|
|
|
JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
|
|
JVMWrapper("JVM_DesiredAssertionStatus");
|
|
assert(cls != NULL, "bad class");
|
|
|
|
oop r = JNIHandles::resolve(cls);
|
|
assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
|
|
if (java_lang_Class::is_primitive(r)) return false;
|
|
|
|
Klass* k = java_lang_Class::as_Klass(r);
|
|
assert(k->oop_is_instance(), "must be an instance klass");
|
|
if (! k->oop_is_instance()) return false;
|
|
|
|
ResourceMark rm(THREAD);
|
|
const char* name = k->name()->as_C_string();
|
|
bool system_class = k->class_loader() == NULL;
|
|
return JavaAssertions::enabled(name, system_class);
|
|
|
|
JVM_END
|
|
|
|
|
|
// Return a new AssertionStatusDirectives object with the fields filled in with
|
|
// command-line assertion arguments (i.e., -ea, -da).
|
|
JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
|
|
JVMWrapper("JVM_AssertionStatusDirectives");
|
|
JvmtiVMObjectAllocEventCollector oam;
|
|
oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
|
|
return JNIHandles::make_local(env, asd);
|
|
JVM_END
|
|
|
|
// Verification ////////////////////////////////////////////////////////////////////////////////
|
|
|
|
// Reflection for the verifier /////////////////////////////////////////////////////////////////
|
|
|
|
// RedefineClasses support: bug 6214132 caused verification to fail.
|
|
// All functions from this section should call the jvmtiThreadSate function:
|
|
// Klass* class_to_verify_considering_redefinition(Klass* klass).
|
|
// The function returns a Klass* of the _scratch_class if the verifier
|
|
// was invoked in the middle of the class redefinition.
|
|
// Otherwise it returns its argument value which is the _the_class Klass*.
|
|
// Please, refer to the description in the jvmtiThreadSate.hpp.
|
|
|
|
JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
|
|
JVMWrapper("JVM_GetClassNameUTF");
|
|
Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
|
|
k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
|
|
return k->name()->as_utf8();
|
|
JVM_END
|
|
|
|
|
|
JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
|
|
JVMWrapper("JVM_GetClassCPTypes");
|
|
Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
|
|
k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
|
|
// types will have length zero if this is not an InstanceKlass
|
|
// (length is determined by call to JVM_GetClassCPEntriesCount)
|
|
if (k->oop_is_instance()) {
|
|
ConstantPool* cp = InstanceKlass::cast(k)->constants();
|
|
for (int index = cp->length() - 1; index >= 0; index--) {
|
|
constantTag tag = cp->tag_at(index);
|
|
types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class : tag.value();
|
|
}
|
|
}
|
|
JVM_END
|
|
|
|
|
|
JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
|
|
JVMWrapper("JVM_GetClassCPEntriesCount");
|
|
Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
|
|
k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
|
|
if (!k->oop_is_instance())
|
|
return 0;
|
|
return InstanceKlass::cast(k)->constants()->length();
|
|
JVM_END
|
|
|
|
|
|
JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
|
|
JVMWrapper("JVM_GetClassFieldsCount");
|
|
Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
|
|
k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
|
|
if (!k->oop_is_instance())
|
|
return 0;
|
|
return InstanceKlass::cast(k)->java_fields_count();
|
|
JVM_END
|
|
|
|
|
|
JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
|
|
JVMWrapper("JVM_GetClassMethodsCount");
|
|
Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
|
|
k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
|
|
if (!k->oop_is_instance())
|
|
return 0;
|
|
return InstanceKlass::cast(k)->methods()->length();
|
|
JVM_END
|
|
|
|
|
|
// The following methods, used for the verifier, are never called with
|
|
// array klasses, so a direct cast to InstanceKlass is safe.
|
|
// Typically, these methods are called in a loop with bounds determined
|
|
// by the results of JVM_GetClass{Fields,Methods}Count, which return
|
|
// zero for arrays.
|
|
JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
|
|
JVMWrapper("JVM_GetMethodIxExceptionIndexes");
|
|
Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
|
|
k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
|
|
Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
|
|
int length = method->checked_exceptions_length();
|
|
if (length > 0) {
|
|
CheckedExceptionElement* table= method->checked_exceptions_start();
|
|
for (int i = 0; i < length; i++) {
|
|
exceptions[i] = table[i].class_cp_index;
|
|
}
|
|
}
|
|
JVM_END
|
|
|
|
|
|
JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
|
|
JVMWrapper("JVM_GetMethodIxExceptionsCount");
|
|
Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
|
|
k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
|
|
Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
|
|
return method->checked_exceptions_length();
|
|
JVM_END
|
|
|
|
|
|
JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
|
|
JVMWrapper("JVM_GetMethodIxByteCode");
|
|
Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
|
|
k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
|
|
Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
|
|
memcpy(code, method->code_base(), method->code_size());
|
|
JVM_END
|
|
|
|
|
|
JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
|
|
JVMWrapper("JVM_GetMethodIxByteCodeLength");
|
|
Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
|
|
k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
|
|
Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
|
|
return method->code_size();
|
|
JVM_END
|
|
|
|
|
|
JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
|
|
JVMWrapper("JVM_GetMethodIxExceptionTableEntry");
|
|
Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
|
|
k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
|
|
Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
|
|
ExceptionTable extable(method);
|
|
entry->start_pc = extable.start_pc(entry_index);
|
|
entry->end_pc = extable.end_pc(entry_index);
|
|
entry->handler_pc = extable.handler_pc(entry_index);
|
|
entry->catchType = extable.catch_type_index(entry_index);
|
|
JVM_END
|
|
|
|
|
|
JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
|
|
JVMWrapper("JVM_GetMethodIxExceptionTableLength");
|
|
Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
|
|
k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
|
|
Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
|
|
return method->exception_table_length();
|
|
JVM_END
|
|
|
|
|
|
JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
|
|
JVMWrapper("JVM_GetMethodIxModifiers");
|
|
Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
|
|
k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
|
|
Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
|
|
return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
|
|
JVM_END
|
|
|
|
|
|
JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
|
|
JVMWrapper("JVM_GetFieldIxModifiers");
|
|
Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
|
|
k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
|
|
return InstanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS;
|
|
JVM_END
|
|
|
|
|
|
JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index))
|
|
JVMWrapper("JVM_GetMethodIxLocalsCount");
|
|
Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
|
|
k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
|
|
Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
|
|
return method->max_locals();
|
|
JVM_END
|
|
|
|
|
|
JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
|
|
JVMWrapper("JVM_GetMethodIxArgsSize");
|
|
Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
|
|
k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
|
|
Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
|
|
return method->size_of_parameters();
|
|
JVM_END
|
|
|
|
|
|
JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
|
|
JVMWrapper("JVM_GetMethodIxMaxStack");
|
|
Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
|
|
k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
|
|
Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
|
|
return method->verifier_max_stack();
|
|
JVM_END
|
|
|
|
|
|
JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
|
|
JVMWrapper("JVM_IsConstructorIx");
|
|
ResourceMark rm(THREAD);
|
|
Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
|
|
k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
|
|
Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
|
|
return method->name() == vmSymbols::object_initializer_name();
|
|
JVM_END
|
|
|
|
|
|
JVM_QUICK_ENTRY(jboolean, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index))
|
|
JVMWrapper("JVM_IsVMGeneratedMethodIx");
|
|
ResourceMark rm(THREAD);
|
|
Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
|
|
k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
|
|
Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
|
|
return method->is_overpass();
|
|
JVM_END
|
|
|
|
JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
|
|
JVMWrapper("JVM_GetMethodIxIxUTF");
|
|
Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
|
|
k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
|
|
Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
|
|
return method->name()->as_utf8();
|
|
JVM_END
|
|
|
|
|
|
JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
|
|
JVMWrapper("JVM_GetMethodIxSignatureUTF");
|
|
Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
|
|
k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
|
|
Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
|
|
return method->signature()->as_utf8();
|
|
JVM_END
|
|
|
|
/**
|
|
* All of these JVM_GetCP-xxx methods are used by the old verifier to
|
|
* read entries in the constant pool. Since the old verifier always
|
|
* works on a copy of the code, it will not see any rewriting that
|
|
* may possibly occur in the middle of verification. So it is important
|
|
* that nothing it calls tries to use the cpCache instead of the raw
|
|
* constant pool, so we must use cp->uncached_x methods when appropriate.
|
|
*/
|
|
JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
|
|
JVMWrapper("JVM_GetCPFieldNameUTF");
|
|
Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
|
|
k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
|
|
ConstantPool* cp = InstanceKlass::cast(k)->constants();
|
|
switch (cp->tag_at(cp_index).value()) {
|
|
case JVM_CONSTANT_Fieldref:
|
|
return cp->uncached_name_ref_at(cp_index)->as_utf8();
|
|
default:
|
|
fatal("JVM_GetCPFieldNameUTF: illegal constant");
|
|
}
|
|
ShouldNotReachHere();
|
|
return NULL;
|
|
JVM_END
|
|
|
|
|
|
JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
|
|
JVMWrapper("JVM_GetCPMethodNameUTF");
|
|
Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
|
|
k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
|
|
ConstantPool* cp = InstanceKlass::cast(k)->constants();
|
|
switch (cp->tag_at(cp_index).value()) {
|
|
case JVM_CONSTANT_InterfaceMethodref:
|
|
case JVM_CONSTANT_Methodref:
|
|
case JVM_CONSTANT_NameAndType: // for invokedynamic
|
|
return cp->uncached_name_ref_at(cp_index)->as_utf8();
|
|
default:
|
|
fatal("JVM_GetCPMethodNameUTF: illegal constant");
|
|
}
|
|
ShouldNotReachHere();
|
|
return NULL;
|
|
JVM_END
|
|
|
|
|
|
JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
|
|
JVMWrapper("JVM_GetCPMethodSignatureUTF");
|
|
Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
|
|
k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
|
|
ConstantPool* cp = InstanceKlass::cast(k)->constants();
|
|
switch (cp->tag_at(cp_index).value()) {
|
|
case JVM_CONSTANT_InterfaceMethodref:
|
|
case JVM_CONSTANT_Methodref:
|
|
case JVM_CONSTANT_NameAndType: // for invokedynamic
|
|
return cp->uncached_signature_ref_at(cp_index)->as_utf8();
|
|
default:
|
|
fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
|
|
}
|
|
ShouldNotReachHere();
|
|
return NULL;
|
|
JVM_END
|
|
|
|
|
|
JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
|
|
JVMWrapper("JVM_GetCPFieldSignatureUTF");
|
|
Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
|
|
k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
|
|
ConstantPool* cp = InstanceKlass::cast(k)->constants();
|
|
switch (cp->tag_at(cp_index).value()) {
|
|
case JVM_CONSTANT_Fieldref:
|
|
return cp->uncached_signature_ref_at(cp_index)->as_utf8();
|
|
default:
|
|
fatal("JVM_GetCPFieldSignatureUTF: illegal constant");
|
|
}
|
|
ShouldNotReachHere();
|
|
return NULL;
|
|
JVM_END
|
|
|
|
|
|
JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
|
|
JVMWrapper("JVM_GetCPClassNameUTF");
|
|
Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
|
|
k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
|
|
ConstantPool* cp = InstanceKlass::cast(k)->constants();
|
|
Symbol* classname = cp->klass_name_at(cp_index);
|
|
return classname->as_utf8();
|
|
JVM_END
|
|
|
|
|
|
JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
|
|
JVMWrapper("JVM_GetCPFieldClassNameUTF");
|
|
Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
|
|
k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
|
|
ConstantPool* cp = InstanceKlass::cast(k)->constants();
|
|
switch (cp->tag_at(cp_index).value()) {
|
|
case JVM_CONSTANT_Fieldref: {
|
|
int class_index = cp->uncached_klass_ref_index_at(cp_index);
|
|
Symbol* classname = cp->klass_name_at(class_index);
|
|
return classname->as_utf8();
|
|
}
|
|
default:
|
|
fatal("JVM_GetCPFieldClassNameUTF: illegal constant");
|
|
}
|
|
ShouldNotReachHere();
|
|
return NULL;
|
|
JVM_END
|
|
|
|
|
|
JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
|
|
JVMWrapper("JVM_GetCPMethodClassNameUTF");
|
|
Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
|
|
k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
|
|
ConstantPool* cp = InstanceKlass::cast(k)->constants();
|
|
switch (cp->tag_at(cp_index).value()) {
|
|
case JVM_CONSTANT_Methodref:
|
|
case JVM_CONSTANT_InterfaceMethodref: {
|
|
int class_index = cp->uncached_klass_ref_index_at(cp_index);
|
|
Symbol* classname = cp->klass_name_at(class_index);
|
|
return classname->as_utf8();
|
|
}
|
|
default:
|
|
fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
|
|
}
|
|
ShouldNotReachHere();
|
|
return NULL;
|
|
JVM_END
|
|
|
|
|
|
JVM_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
|
|
JVMWrapper("JVM_GetCPFieldModifiers");
|
|
Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
|
|
Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
|
|
k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
|
|
k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
|
|
ConstantPool* cp = InstanceKlass::cast(k)->constants();
|
|
ConstantPool* cp_called = InstanceKlass::cast(k_called)->constants();
|
|
switch (cp->tag_at(cp_index).value()) {
|
|
case JVM_CONSTANT_Fieldref: {
|
|
Symbol* name = cp->uncached_name_ref_at(cp_index);
|
|
Symbol* signature = cp->uncached_signature_ref_at(cp_index);
|
|
for (JavaFieldStream fs(k_called); !fs.done(); fs.next()) {
|
|
if (fs.name() == name && fs.signature() == signature) {
|
|
return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS;
|
|
}
|
|
}
|
|
return -1;
|
|
}
|
|
default:
|
|
fatal("JVM_GetCPFieldModifiers: illegal constant");
|
|
}
|
|
ShouldNotReachHere();
|
|
return 0;
|
|
JVM_END
|
|
|
|
|
|
JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
|
|
JVMWrapper("JVM_GetCPMethodModifiers");
|
|
Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
|
|
Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
|
|
k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
|
|
k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
|
|
ConstantPool* cp = InstanceKlass::cast(k)->constants();
|
|
switch (cp->tag_at(cp_index).value()) {
|
|
case JVM_CONSTANT_Methodref:
|
|
case JVM_CONSTANT_InterfaceMethodref: {
|
|
Symbol* name = cp->uncached_name_ref_at(cp_index);
|
|
Symbol* signature = cp->uncached_signature_ref_at(cp_index);
|
|
Array<Method*>* methods = InstanceKlass::cast(k_called)->methods();
|
|
int methods_count = methods->length();
|
|
for (int i = 0; i < methods_count; i++) {
|
|
Method* method = methods->at(i);
|
|
if (method->name() == name && method->signature() == signature) {
|
|
return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
|
|
}
|
|
}
|
|
return -1;
|
|
}
|
|
default:
|
|
fatal("JVM_GetCPMethodModifiers: illegal constant");
|
|
}
|
|
ShouldNotReachHere();
|
|
return 0;
|
|
JVM_END
|
|
|
|
|
|
// Misc //////////////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
JVM_LEAF(void, JVM_ReleaseUTF(const char *utf))
|
|
// So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
|
|
JVM_END
|
|
|
|
|
|
JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
|
|
JVMWrapper("JVM_IsSameClassPackage");
|
|
oop class1_mirror = JNIHandles::resolve_non_null(class1);
|
|
oop class2_mirror = JNIHandles::resolve_non_null(class2);
|
|
Klass* klass1 = java_lang_Class::as_Klass(class1_mirror);
|
|
Klass* klass2 = java_lang_Class::as_Klass(class2_mirror);
|
|
return (jboolean) Reflection::is_same_class_package(klass1, klass2);
|
|
JVM_END
|
|
|
|
// Printing support //////////////////////////////////////////////////
|
|
extern "C" {
|
|
|
|
ATTRIBUTE_PRINTF(3, 0)
|
|
int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
|
|
// see bug 4399518, 4417214
|
|
if ((intptr_t)count <= 0) return -1;
|
|
|
|
int result = vsnprintf(str, count, fmt, args);
|
|
// Note: on truncation vsnprintf(3) on Unix returns numbers of
|
|
// characters which would have been written had the buffer been large
|
|
// enough; on Windows, it returns -1. We handle both cases here and
|
|
// always return -1, and perform null termination.
|
|
if ((result > 0 && (size_t)result >= count) || result == -1) {
|
|
str[count - 1] = '\0';
|
|
result = -1;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
ATTRIBUTE_PRINTF(3, 0)
|
|
int jio_snprintf(char *str, size_t count, const char *fmt, ...) {
|
|
va_list args;
|
|
int len;
|
|
va_start(args, fmt);
|
|
len = jio_vsnprintf(str, count, fmt, args);
|
|
va_end(args);
|
|
return len;
|
|
}
|
|
|
|
ATTRIBUTE_PRINTF(2,3)
|
|
int jio_fprintf(FILE* f, const char *fmt, ...) {
|
|
int len;
|
|
va_list args;
|
|
va_start(args, fmt);
|
|
len = jio_vfprintf(f, fmt, args);
|
|
va_end(args);
|
|
return len;
|
|
}
|
|
|
|
ATTRIBUTE_PRINTF(2, 0)
|
|
int jio_vfprintf(FILE* f, const char *fmt, va_list args) {
|
|
if (Arguments::vfprintf_hook() != NULL) {
|
|
return Arguments::vfprintf_hook()(f, fmt, args);
|
|
} else {
|
|
return vfprintf(f, fmt, args);
|
|
}
|
|
}
|
|
|
|
ATTRIBUTE_PRINTF(1, 2)
|
|
JNIEXPORT int jio_printf(const char *fmt, ...) {
|
|
int len;
|
|
va_list args;
|
|
va_start(args, fmt);
|
|
len = jio_vfprintf(defaultStream::output_stream(), fmt, args);
|
|
va_end(args);
|
|
return len;
|
|
}
|
|
|
|
|
|
// HotSpot specific jio method
|
|
void jio_print(const char* s) {
|
|
// Try to make this function as atomic as possible.
|
|
if (Arguments::vfprintf_hook() != NULL) {
|
|
jio_fprintf(defaultStream::output_stream(), "%s", s);
|
|
} else {
|
|
// Make an unused local variable to avoid warning from gcc 4.x compiler.
|
|
size_t count = ::write(defaultStream::output_fd(), s, (int)strlen(s));
|
|
}
|
|
}
|
|
|
|
} // Extern C
|
|
|
|
// java.lang.Thread //////////////////////////////////////////////////////////////////////////////
|
|
|
|
// In most of the JVM Thread support functions we need to be sure to lock the Threads_lock
|
|
// to prevent the target thread from exiting after we have a pointer to the C++ Thread or
|
|
// OSThread objects. The exception to this rule is when the target object is the thread
|
|
// doing the operation, in which case we know that the thread won't exit until the
|
|
// operation is done (all exits being voluntary). There are a few cases where it is
|
|
// rather silly to do operations on yourself, like resuming yourself or asking whether
|
|
// you are alive. While these can still happen, they are not subject to deadlocks if
|
|
// the lock is held while the operation occurs (this is not the case for suspend, for
|
|
// instance), and are very unlikely. Because IsAlive needs to be fast and its
|
|
// implementation is local to this file, we always lock Threads_lock for that one.
|
|
|
|
static void thread_entry(JavaThread* thread, TRAPS) {
|
|
HandleMark hm(THREAD);
|
|
Handle obj(THREAD, thread->threadObj());
|
|
JavaValue result(T_VOID);
|
|
JavaCalls::call_virtual(&result,
|
|
obj,
|
|
KlassHandle(THREAD, SystemDictionary::Thread_klass()),
|
|
vmSymbols::run_method_name(),
|
|
vmSymbols::void_method_signature(),
|
|
THREAD);
|
|
}
|
|
|
|
|
|
JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread))
|
|
JVMWrapper("JVM_StartThread");
|
|
JavaThread *native_thread = NULL;
|
|
|
|
// We cannot hold the Threads_lock when we throw an exception,
|
|
// due to rank ordering issues. Example: we might need to grab the
|
|
// Heap_lock while we construct the exception.
|
|
bool throw_illegal_thread_state = false;
|
|
|
|
// We must release the Threads_lock before we can post a jvmti event
|
|
// in Thread::start.
|
|
{
|
|
// Ensure that the C++ Thread and OSThread structures aren't freed before
|
|
// we operate.
|
|
MutexLocker mu(Threads_lock);
|
|
|
|
// Since JDK 5 the java.lang.Thread threadStatus is used to prevent
|
|
// re-starting an already started thread, so we should usually find
|
|
// that the JavaThread is null. However for a JNI attached thread
|
|
// there is a small window between the Thread object being created
|
|
// (with its JavaThread set) and the update to its threadStatus, so we
|
|
// have to check for this
|
|
if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) {
|
|
throw_illegal_thread_state = true;
|
|
} else {
|
|
// We could also check the stillborn flag to see if this thread was already stopped, but
|
|
// for historical reasons we let the thread detect that itself when it starts running
|
|
|
|
jlong size =
|
|
java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread));
|
|
// Allocate the C++ Thread structure and create the native thread. The
|
|
// stack size retrieved from java is signed, but the constructor takes
|
|
// size_t (an unsigned type), so avoid passing negative values which would
|
|
// result in really large stacks.
|
|
size_t sz = size > 0 ? (size_t) size : 0;
|
|
native_thread = new JavaThread(&thread_entry, sz);
|
|
|
|
// At this point it may be possible that no osthread was created for the
|
|
// JavaThread due to lack of memory. Check for this situation and throw
|
|
// an exception if necessary. Eventually we may want to change this so
|
|
// that we only grab the lock if the thread was created successfully -
|
|
// then we can also do this check and throw the exception in the
|
|
// JavaThread constructor.
|
|
if (native_thread->osthread() != NULL) {
|
|
// Note: the current thread is not being used within "prepare".
|
|
native_thread->prepare(jthread);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (throw_illegal_thread_state) {
|
|
THROW(vmSymbols::java_lang_IllegalThreadStateException());
|
|
}
|
|
|
|
assert(native_thread != NULL, "Starting null thread?");
|
|
|
|
if (native_thread->osthread() == NULL) {
|
|
// No one should hold a reference to the 'native_thread'.
|
|
delete native_thread;
|
|
if (JvmtiExport::should_post_resource_exhausted()) {
|
|
JvmtiExport::post_resource_exhausted(
|
|
JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
|
|
os::native_thread_creation_failed_msg());
|
|
}
|
|
THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
|
|
os::native_thread_creation_failed_msg());
|
|
}
|
|
|
|
Thread::start(native_thread);
|
|
|
|
JVM_END
|
|
|
|
// JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints
|
|
// before the quasi-asynchronous exception is delivered. This is a little obtrusive,
|
|
// but is thought to be reliable and simple. In the case, where the receiver is the
|
|
// same thread as the sender, no safepoint is needed.
|
|
JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable))
|
|
JVMWrapper("JVM_StopThread");
|
|
|
|
oop java_throwable = JNIHandles::resolve(throwable);
|
|
if (java_throwable == NULL) {
|
|
THROW(vmSymbols::java_lang_NullPointerException());
|
|
}
|
|
oop java_thread = JNIHandles::resolve_non_null(jthread);
|
|
JavaThread* receiver = java_lang_Thread::thread(java_thread);
|
|
Events::log_exception(JavaThread::current(),
|
|
"JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]",
|
|
p2i(receiver), p2i((address)java_thread), p2i(throwable));
|
|
// First check if thread is alive
|
|
if (receiver != NULL) {
|
|
// Check if exception is getting thrown at self (use oop equality, since the
|
|
// target object might exit)
|
|
if (java_thread == thread->threadObj()) {
|
|
THROW_OOP(java_throwable);
|
|
} else {
|
|
// Enques a VM_Operation to stop all threads and then deliver the exception...
|
|
Thread::send_async_exception(java_thread, JNIHandles::resolve(throwable));
|
|
}
|
|
}
|
|
else {
|
|
// Either:
|
|
// - target thread has not been started before being stopped, or
|
|
// - target thread already terminated
|
|
// We could read the threadStatus to determine which case it is
|
|
// but that is overkill as it doesn't matter. We must set the
|
|
// stillborn flag for the first case, and if the thread has already
|
|
// exited setting this flag has no affect
|
|
java_lang_Thread::set_stillborn(java_thread);
|
|
}
|
|
JVM_END
|
|
|
|
|
|
JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread))
|
|
JVMWrapper("JVM_IsThreadAlive");
|
|
|
|
oop thread_oop = JNIHandles::resolve_non_null(jthread);
|
|
return java_lang_Thread::is_alive(thread_oop);
|
|
JVM_END
|
|
|
|
|
|
JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread))
|
|
JVMWrapper("JVM_SuspendThread");
|
|
oop java_thread = JNIHandles::resolve_non_null(jthread);
|
|
JavaThread* receiver = java_lang_Thread::thread(java_thread);
|
|
|
|
if (receiver != NULL) {
|
|
// thread has run and has not exited (still on threads list)
|
|
|
|
{
|
|
MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag);
|
|
if (receiver->is_external_suspend()) {
|
|
// Don't allow nested external suspend requests. We can't return
|
|
// an error from this interface so just ignore the problem.
|
|
return;
|
|
}
|
|
if (receiver->is_exiting()) { // thread is in the process of exiting
|
|
return;
|
|
}
|
|
receiver->set_external_suspend();
|
|
}
|
|
|
|
// java_suspend() will catch threads in the process of exiting
|
|
// and will ignore them.
|
|
receiver->java_suspend();
|
|
|
|
// It would be nice to have the following assertion in all the
|
|
// time, but it is possible for a racing resume request to have
|
|
// resumed this thread right after we suspended it. Temporarily
|
|
// enable this assertion if you are chasing a different kind of
|
|
// bug.
|
|
//
|
|
// assert(java_lang_Thread::thread(receiver->threadObj()) == NULL ||
|
|
// receiver->is_being_ext_suspended(), "thread is not suspended");
|
|
}
|
|
JVM_END
|
|
|
|
|
|
JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread))
|
|
JVMWrapper("JVM_ResumeThread");
|
|
// Ensure that the C++ Thread and OSThread structures aren't freed before we operate.
|
|
// We need to *always* get the threads lock here, since this operation cannot be allowed during
|
|
// a safepoint. The safepoint code relies on suspending a thread to examine its state. If other
|
|
// threads randomly resumes threads, then a thread might not be suspended when the safepoint code
|
|
// looks at it.
|
|
MutexLocker ml(Threads_lock);
|
|
JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
|
|
if (thr != NULL) {
|
|
// the thread has run and is not in the process of exiting
|
|
thr->java_resume();
|
|
}
|
|
JVM_END
|
|
|
|
|
|
JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
|
|
JVMWrapper("JVM_SetThreadPriority");
|
|
// Ensure that the C++ Thread and OSThread structures aren't freed before we operate
|
|
MutexLocker ml(Threads_lock);
|
|
oop java_thread = JNIHandles::resolve_non_null(jthread);
|
|
java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
|
|
JavaThread* thr = java_lang_Thread::thread(java_thread);
|
|
if (thr != NULL) { // Thread not yet started; priority pushed down when it is
|
|
Thread::set_priority(thr, (ThreadPriority)prio);
|
|
}
|
|
JVM_END
|
|
|
|
|
|
JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass))
|
|
JVMWrapper("JVM_Yield");
|
|
if (os::dont_yield()) return;
|
|
HOTSPOT_THREAD_YIELD();
|
|
|
|
// When ConvertYieldToSleep is off (default), this matches the classic VM use of yield.
|
|
// Critical for similar threading behaviour
|
|
if (ConvertYieldToSleep) {
|
|
os::sleep(thread, MinSleepInterval, false);
|
|
} else {
|
|
os::naked_yield();
|
|
}
|
|
JVM_END
|
|
|
|
|
|
JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis))
|
|
JVMWrapper("JVM_Sleep");
|
|
|
|
if (millis < 0) {
|
|
THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative");
|
|
}
|
|
|
|
if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) {
|
|
THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
|
|
}
|
|
|
|
// Save current thread state and restore it at the end of this block.
|
|
// And set new thread state to SLEEPING.
|
|
JavaThreadSleepState jtss(thread);
|
|
|
|
HOTSPOT_THREAD_SLEEP_BEGIN(millis);
|
|
|
|
EventThreadSleep event;
|
|
|
|
if (millis == 0) {
|
|
// When ConvertSleepToYield is on, this matches the classic VM implementation of
|
|
// JVM_Sleep. Critical for similar threading behaviour (Win32)
|
|
// It appears that in certain GUI contexts, it may be beneficial to do a short sleep
|
|
// for SOLARIS
|
|
if (ConvertSleepToYield) {
|
|
os::naked_yield();
|
|
} else {
|
|
ThreadState old_state = thread->osthread()->get_state();
|
|
thread->osthread()->set_state(SLEEPING);
|
|
os::sleep(thread, MinSleepInterval, false);
|
|
thread->osthread()->set_state(old_state);
|
|
}
|
|
} else {
|
|
ThreadState old_state = thread->osthread()->get_state();
|
|
thread->osthread()->set_state(SLEEPING);
|
|
if (os::sleep(thread, millis, true) == OS_INTRPT) {
|
|
// An asynchronous exception (e.g., ThreadDeathException) could have been thrown on
|
|
// us while we were sleeping. We do not overwrite those.
|
|
if (!HAS_PENDING_EXCEPTION) {
|
|
if (event.should_commit()) {
|
|
event.set_time(millis);
|
|
event.commit();
|
|
}
|
|
HOTSPOT_THREAD_SLEEP_END(1);
|
|
|
|
// TODO-FIXME: THROW_MSG returns which means we will not call set_state()
|
|
// to properly restore the thread state. That's likely wrong.
|
|
THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
|
|
}
|
|
}
|
|
thread->osthread()->set_state(old_state);
|
|
}
|
|
if (event.should_commit()) {
|
|
event.set_time(millis);
|
|
event.commit();
|
|
}
|
|
HOTSPOT_THREAD_SLEEP_END(0);
|
|
JVM_END
|
|
|
|
JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
|
|
JVMWrapper("JVM_CurrentThread");
|
|
oop jthread = thread->threadObj();
|
|
assert (thread != NULL, "no current thread!");
|
|
return JNIHandles::make_local(env, jthread);
|
|
JVM_END
|
|
|
|
|
|
JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread))
|
|
JVMWrapper("JVM_CountStackFrames");
|
|
|
|
// Ensure that the C++ Thread and OSThread structures aren't freed before we operate
|
|
oop java_thread = JNIHandles::resolve_non_null(jthread);
|
|
bool throw_illegal_thread_state = false;
|
|
int count = 0;
|
|
|
|
{
|
|
MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
|
|
// We need to re-resolve the java_thread, since a GC might have happened during the
|
|
// acquire of the lock
|
|
JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
|
|
|
|
if (thr == NULL) {
|
|
// do nothing
|
|
} else if(! thr->is_external_suspend() || ! thr->frame_anchor()->walkable()) {
|
|
// Check whether this java thread has been suspended already. If not, throws
|
|
// IllegalThreadStateException. We defer to throw that exception until
|
|
// Threads_lock is released since loading exception class has to leave VM.
|
|
// The correct way to test a thread is actually suspended is
|
|
// wait_for_ext_suspend_completion(), but we can't call that while holding
|
|
// the Threads_lock. The above tests are sufficient for our purposes
|
|
// provided the walkability of the stack is stable - which it isn't
|
|
// 100% but close enough for most practical purposes.
|
|
throw_illegal_thread_state = true;
|
|
} else {
|
|
// Count all java activation, i.e., number of vframes
|
|
for(vframeStream vfst(thr); !vfst.at_end(); vfst.next()) {
|
|
// Native frames are not counted
|
|
if (!vfst.method()->is_native()) count++;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (throw_illegal_thread_state) {
|
|
THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(),
|
|
"this thread is not suspended");
|
|
}
|
|
return count;
|
|
JVM_END
|
|
|
|
// Consider: A better way to implement JVM_Interrupt() is to acquire
|
|
// Threads_lock to resolve the jthread into a Thread pointer, fetch
|
|
// Thread->platformevent, Thread->native_thr, Thread->parker, etc.,
|
|
// drop Threads_lock, and the perform the unpark() and thr_kill() operations
|
|
// outside the critical section. Threads_lock is hot so we want to minimize
|
|
// the hold-time. A cleaner interface would be to decompose interrupt into
|
|
// two steps. The 1st phase, performed under Threads_lock, would return
|
|
// a closure that'd be invoked after Threads_lock was dropped.
|
|
// This tactic is safe as PlatformEvent and Parkers are type-stable (TSM) and
|
|
// admit spurious wakeups.
|
|
|
|
JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread))
|
|
JVMWrapper("JVM_Interrupt");
|
|
|
|
// Ensure that the C++ Thread and OSThread structures aren't freed before we operate
|
|
oop java_thread = JNIHandles::resolve_non_null(jthread);
|
|
MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
|
|
// We need to re-resolve the java_thread, since a GC might have happened during the
|
|
// acquire of the lock
|
|
JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
|
|
if (thr != NULL) {
|
|
Thread::interrupt(thr);
|
|
}
|
|
JVM_END
|
|
|
|
|
|
JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted))
|
|
JVMWrapper("JVM_IsInterrupted");
|
|
|
|
// Ensure that the C++ Thread and OSThread structures aren't freed before we operate
|
|
oop java_thread = JNIHandles::resolve_non_null(jthread);
|
|
MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
|
|
// We need to re-resolve the java_thread, since a GC might have happened during the
|
|
// acquire of the lock
|
|
JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
|
|
if (thr == NULL) {
|
|
return JNI_FALSE;
|
|
} else {
|
|
return (jboolean) Thread::is_interrupted(thr, clear_interrupted != 0);
|
|
}
|
|
JVM_END
|
|
|
|
|
|
// Return true iff the current thread has locked the object passed in
|
|
|
|
JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
|
|
JVMWrapper("JVM_HoldsLock");
|
|
assert(THREAD->is_Java_thread(), "sanity check");
|
|
if (obj == NULL) {
|
|
THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
|
|
}
|
|
Handle h_obj(THREAD, JNIHandles::resolve(obj));
|
|
return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj);
|
|
JVM_END
|
|
|
|
|
|
JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass))
|
|
JVMWrapper("JVM_DumpAllStacks");
|
|
VM_PrintThreads op;
|
|
VMThread::execute(&op);
|
|
if (JvmtiExport::should_post_data_dump()) {
|
|
JvmtiExport::post_data_dump();
|
|
}
|
|
JVM_END
|
|
|
|
JVM_ENTRY(void, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name))
|
|
JVMWrapper("JVM_SetNativeThreadName");
|
|
ResourceMark rm(THREAD);
|
|
oop java_thread = JNIHandles::resolve_non_null(jthread);
|
|
JavaThread* thr = java_lang_Thread::thread(java_thread);
|
|
// Thread naming only supported for the current thread, doesn't work for
|
|
// target threads.
|
|
if (Thread::current() == thr && !thr->has_attached_via_jni()) {
|
|
// we don't set the name of an attached thread to avoid stepping
|
|
// on other programs
|
|
const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
|
|
os::set_native_thread_name(thread_name);
|
|
}
|
|
JVM_END
|
|
|
|
// java.lang.SecurityManager ///////////////////////////////////////////////////////////////////////
|
|
|
|
static bool is_trusted_frame(JavaThread* jthread, vframeStream* vfst) {
|
|
assert(jthread->is_Java_thread(), "must be a Java thread");
|
|
if (jthread->privileged_stack_top() == NULL) return false;
|
|
if (jthread->privileged_stack_top()->frame_id() == vfst->frame_id()) {
|
|
oop loader = jthread->privileged_stack_top()->class_loader();
|
|
if (loader == NULL) return true;
|
|
bool trusted = java_lang_ClassLoader::is_trusted_loader(loader);
|
|
if (trusted) return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
JVM_ENTRY(jclass, JVM_CurrentLoadedClass(JNIEnv *env))
|
|
JVMWrapper("JVM_CurrentLoadedClass");
|
|
ResourceMark rm(THREAD);
|
|
|
|
for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
|
|
// if a method in a class in a trusted loader is in a doPrivileged, return NULL
|
|
bool trusted = is_trusted_frame(thread, &vfst);
|
|
if (trusted) return NULL;
|
|
|
|
Method* m = vfst.method();
|
|
if (!m->is_native()) {
|
|
InstanceKlass* holder = m->method_holder();
|
|
oop loader = holder->class_loader();
|
|
if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
|
|
return (jclass) JNIHandles::make_local(env, holder->java_mirror());
|
|
}
|
|
}
|
|
}
|
|
return NULL;
|
|
JVM_END
|
|
|
|
|
|
JVM_ENTRY(jobject, JVM_CurrentClassLoader(JNIEnv *env))
|
|
JVMWrapper("JVM_CurrentClassLoader");
|
|
ResourceMark rm(THREAD);
|
|
|
|
for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
|
|
|
|
// if a method in a class in a trusted loader is in a doPrivileged, return NULL
|
|
bool trusted = is_trusted_frame(thread, &vfst);
|
|
if (trusted) return NULL;
|
|
|
|
Method* m = vfst.method();
|
|
if (!m->is_native()) {
|
|
InstanceKlass* holder = m->method_holder();
|
|
assert(holder->is_klass(), "just checking");
|
|
oop loader = holder->class_loader();
|
|
if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
|
|
return JNIHandles::make_local(env, loader);
|
|
}
|
|
}
|
|
}
|
|
return NULL;
|
|
JVM_END
|
|
|
|
|
|
JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env))
|
|
JVMWrapper("JVM_GetClassContext");
|
|
ResourceMark rm(THREAD);
|
|
JvmtiVMObjectAllocEventCollector oam;
|
|
vframeStream vfst(thread);
|
|
|
|
if (SystemDictionary::reflect_CallerSensitive_klass() != NULL) {
|
|
// This must only be called from SecurityManager.getClassContext
|
|
Method* m = vfst.method();
|
|
if (!(m->method_holder() == SystemDictionary::SecurityManager_klass() &&
|
|
m->name() == vmSymbols::getClassContext_name() &&
|
|
m->signature() == vmSymbols::void_class_array_signature())) {
|
|
THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetClassContext must only be called from SecurityManager.getClassContext");
|
|
}
|
|
}
|
|
|
|
// Collect method holders
|
|
GrowableArray<KlassHandle>* klass_array = new GrowableArray<KlassHandle>();
|
|
for (; !vfst.at_end(); vfst.security_next()) {
|
|
Method* m = vfst.method();
|
|
// Native frames are not returned
|
|
if (!m->is_ignored_by_security_stack_walk() && !m->is_native()) {
|
|
Klass* holder = m->method_holder();
|
|
assert(holder->is_klass(), "just checking");
|
|
klass_array->append(holder);
|
|
}
|
|
}
|
|
|
|
// Create result array of type [Ljava/lang/Class;
|
|
objArrayOop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), klass_array->length(), CHECK_NULL);
|
|
// Fill in mirrors corresponding to method holders
|
|
for (int i = 0; i < klass_array->length(); i++) {
|
|
result->obj_at_put(i, klass_array->at(i)->java_mirror());
|
|
}
|
|
|
|
return (jobjectArray) JNIHandles::make_local(env, result);
|
|
JVM_END
|
|
|
|
|
|
JVM_ENTRY(jint, JVM_ClassDepth(JNIEnv *env, jstring name))
|
|
JVMWrapper("JVM_ClassDepth");
|
|
ResourceMark rm(THREAD);
|
|
Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
|
|
Handle class_name_str = java_lang_String::internalize_classname(h_name, CHECK_0);
|
|
|
|
const char* str = java_lang_String::as_utf8_string(class_name_str());
|
|
TempNewSymbol class_name_sym = SymbolTable::probe(str, (int)strlen(str));
|
|
if (class_name_sym == NULL) {
|
|
return -1;
|
|
}
|
|
|
|
int depth = 0;
|
|
|
|
for(vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
|
|
if (!vfst.method()->is_native()) {
|
|
InstanceKlass* holder = vfst.method()->method_holder();
|
|
assert(holder->is_klass(), "just checking");
|
|
if (holder->name() == class_name_sym) {
|
|
return depth;
|
|
}
|
|
depth++;
|
|
}
|
|
}
|
|
return -1;
|
|
JVM_END
|
|
|
|
|
|
JVM_ENTRY(jint, JVM_ClassLoaderDepth(JNIEnv *env))
|
|
JVMWrapper("JVM_ClassLoaderDepth");
|
|
ResourceMark rm(THREAD);
|
|
int depth = 0;
|
|
for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
|
|
// if a method in a class in a trusted loader is in a doPrivileged, return -1
|
|
bool trusted = is_trusted_frame(thread, &vfst);
|
|
if (trusted) return -1;
|
|
|
|
Method* m = vfst.method();
|
|
if (!m->is_native()) {
|
|
InstanceKlass* holder = m->method_holder();
|
|
assert(holder->is_klass(), "just checking");
|
|
oop loader = holder->class_loader();
|
|
if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
|
|
return depth;
|
|
}
|
|
depth++;
|
|
}
|
|
}
|
|
return -1;
|
|
JVM_END
|
|
|
|
|
|
// java.lang.Package ////////////////////////////////////////////////////////////////
|
|
|
|
|
|
JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name))
|
|
JVMWrapper("JVM_GetSystemPackage");
|
|
ResourceMark rm(THREAD);
|
|
JvmtiVMObjectAllocEventCollector oam;
|
|
char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
|
|
oop result = ClassLoader::get_system_package(str, CHECK_NULL);
|
|
return (jstring) JNIHandles::make_local(result);
|
|
JVM_END
|
|
|
|
|
|
JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env))
|
|
JVMWrapper("JVM_GetSystemPackages");
|
|
JvmtiVMObjectAllocEventCollector oam;
|
|
objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
|
|
return (jobjectArray) JNIHandles::make_local(result);
|
|
JVM_END
|
|
|
|
|
|
// ObjectInputStream ///////////////////////////////////////////////////////////////
|
|
|
|
bool force_verify_field_access(Klass* current_class, Klass* field_class, AccessFlags access, bool classloader_only) {
|
|
if (current_class == NULL) {
|
|
return true;
|
|
}
|
|
if ((current_class == field_class) || access.is_public()) {
|
|
return true;
|
|
}
|
|
|
|
if (access.is_protected()) {
|
|
// See if current_class is a subclass of field_class
|
|
if (current_class->is_subclass_of(field_class)) {
|
|
return true;
|
|
}
|
|
}
|
|
|
|
return (!access.is_private() && InstanceKlass::cast(current_class)->is_same_class_package(field_class));
|
|
}
|
|
|
|
// Return the first non-null class loader up the execution stack, or null
|
|
// if only code from the null class loader is on the stack.
|
|
|
|
JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env))
|
|
for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
|
|
vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection
|
|
oop loader = vfst.method()->method_holder()->class_loader();
|
|
if (loader != NULL) {
|
|
return JNIHandles::make_local(env, loader);
|
|
}
|
|
}
|
|
return NULL;
|
|
JVM_END
|
|
|
|
|
|
// Array ///////////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
|
|
// resolve array handle and check arguments
|
|
static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
|
|
if (arr == NULL) {
|
|
THROW_0(vmSymbols::java_lang_NullPointerException());
|
|
}
|
|
oop a = JNIHandles::resolve_non_null(arr);
|
|
if (!a->is_array()) {
|
|
THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
|
|
} else if (type_array_only && !a->is_typeArray()) {
|
|
THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array of primitive type");
|
|
}
|
|
return arrayOop(a);
|
|
}
|
|
|
|
|
|
JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr))
|
|
JVMWrapper("JVM_GetArrayLength");
|
|
arrayOop a = check_array(env, arr, false, CHECK_0);
|
|
return a->length();
|
|
JVM_END
|
|
|
|
|
|
JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
|
|
JVMWrapper("JVM_Array_Get");
|
|
JvmtiVMObjectAllocEventCollector oam;
|
|
arrayOop a = check_array(env, arr, false, CHECK_NULL);
|
|
jvalue value;
|
|
BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
|
|
oop box = Reflection::box(&value, type, CHECK_NULL);
|
|
return JNIHandles::make_local(env, box);
|
|
JVM_END
|
|
|
|
|
|
JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
|
|
JVMWrapper("JVM_GetPrimitiveArrayElement");
|
|
jvalue value;
|
|
value.i = 0; // to initialize value before getting used in CHECK
|
|
arrayOop a = check_array(env, arr, true, CHECK_(value));
|
|
assert(a->is_typeArray(), "just checking");
|
|
BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
|
|
BasicType wide_type = (BasicType) wCode;
|
|
if (type != wide_type) {
|
|
Reflection::widen(&value, type, wide_type, CHECK_(value));
|
|
}
|
|
return value;
|
|
JVM_END
|
|
|
|
|
|
JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
|
|
JVMWrapper("JVM_SetArrayElement");
|
|
arrayOop a = check_array(env, arr, false, CHECK);
|
|
oop box = JNIHandles::resolve(val);
|
|
jvalue value;
|
|
value.i = 0; // to initialize value before getting used in CHECK
|
|
BasicType value_type;
|
|
if (a->is_objArray()) {
|
|
// Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
|
|
value_type = Reflection::unbox_for_regular_object(box, &value);
|
|
} else {
|
|
value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
|
|
}
|
|
Reflection::array_set(&value, a, index, value_type, CHECK);
|
|
JVM_END
|
|
|
|
|
|
JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
|
|
JVMWrapper("JVM_SetPrimitiveArrayElement");
|
|
arrayOop a = check_array(env, arr, true, CHECK);
|
|
assert(a->is_typeArray(), "just checking");
|
|
BasicType value_type = (BasicType) vCode;
|
|
Reflection::array_set(&v, a, index, value_type, CHECK);
|
|
JVM_END
|
|
|
|
|
|
JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
|
|
JVMWrapper("JVM_NewArray");
|
|
JvmtiVMObjectAllocEventCollector oam;
|
|
oop element_mirror = JNIHandles::resolve(eltClass);
|
|
oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
|
|
return JNIHandles::make_local(env, result);
|
|
JVM_END
|
|
|
|
|
|
JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
|
|
JVMWrapper("JVM_NewMultiArray");
|
|
JvmtiVMObjectAllocEventCollector oam;
|
|
arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
|
|
oop element_mirror = JNIHandles::resolve(eltClass);
|
|
assert(dim_array->is_typeArray(), "just checking");
|
|
oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
|
|
return JNIHandles::make_local(env, result);
|
|
JVM_END
|
|
|
|
|
|
// Library support ///////////////////////////////////////////////////////////////////////////
|
|
|
|
JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name))
|
|
//%note jvm_ct
|
|
JVMWrapper2("JVM_LoadLibrary (%s)", name);
|
|
char ebuf[1024];
|
|
void *load_result;
|
|
{
|
|
ThreadToNativeFromVM ttnfvm(thread);
|
|
load_result = os::dll_load(name, ebuf, sizeof ebuf);
|
|
}
|
|
if (load_result == NULL) {
|
|
char msg[1024];
|
|
jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
|
|
// Since 'ebuf' may contain a string encoded using
|
|
// platform encoding scheme, we need to pass
|
|
// Exceptions::unsafe_to_utf8 to the new_exception method
|
|
// as the last argument. See bug 6367357.
|
|
Handle h_exception =
|
|
Exceptions::new_exception(thread,
|
|
vmSymbols::java_lang_UnsatisfiedLinkError(),
|
|
msg, Exceptions::unsafe_to_utf8);
|
|
|
|
THROW_HANDLE_0(h_exception);
|
|
}
|
|
return load_result;
|
|
JVM_END
|
|
|
|
|
|
JVM_LEAF(void, JVM_UnloadLibrary(void* handle))
|
|
JVMWrapper("JVM_UnloadLibrary");
|
|
os::dll_unload(handle);
|
|
JVM_END
|
|
|
|
|
|
JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name))
|
|
JVMWrapper2("JVM_FindLibraryEntry (%s)", name);
|
|
return os::dll_lookup(handle, name);
|
|
JVM_END
|
|
|
|
|
|
// JNI version ///////////////////////////////////////////////////////////////////////////////
|
|
|
|
JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version))
|
|
JVMWrapper2("JVM_IsSupportedJNIVersion (%d)", version);
|
|
return Threads::is_supported_jni_version_including_1_1(version);
|
|
JVM_END
|
|
|
|
|
|
// String support ///////////////////////////////////////////////////////////////////////////
|
|
|
|
JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str))
|
|
JVMWrapper("JVM_InternString");
|
|
JvmtiVMObjectAllocEventCollector oam;
|
|
if (str == NULL) return NULL;
|
|
oop string = JNIHandles::resolve_non_null(str);
|
|
oop result = StringTable::intern(string, CHECK_NULL);
|
|
return (jstring) JNIHandles::make_local(env, result);
|
|
JVM_END
|
|
|
|
|
|
// Raw monitor support //////////////////////////////////////////////////////////////////////
|
|
|
|
// The lock routine below calls lock_without_safepoint_check in order to get a raw lock
|
|
// without interfering with the safepoint mechanism. The routines are not JVM_LEAF because
|
|
// they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check
|
|
// that only works with java threads.
|
|
|
|
|
|
JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
|
|
VM_Exit::block_if_vm_exited();
|
|
JVMWrapper("JVM_RawMonitorCreate");
|
|
return new Mutex(Mutex::native, "JVM_RawMonitorCreate");
|
|
}
|
|
|
|
|
|
JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) {
|
|
VM_Exit::block_if_vm_exited();
|
|
JVMWrapper("JVM_RawMonitorDestroy");
|
|
delete ((Mutex*) mon);
|
|
}
|
|
|
|
|
|
JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) {
|
|
VM_Exit::block_if_vm_exited();
|
|
JVMWrapper("JVM_RawMonitorEnter");
|
|
((Mutex*) mon)->jvm_raw_lock();
|
|
return 0;
|
|
}
|
|
|
|
|
|
JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) {
|
|
VM_Exit::block_if_vm_exited();
|
|
JVMWrapper("JVM_RawMonitorExit");
|
|
((Mutex*) mon)->jvm_raw_unlock();
|
|
}
|
|
|
|
|
|
// Shared JNI/JVM entry points //////////////////////////////////////////////////////////////
|
|
|
|
jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init,
|
|
Handle loader, Handle protection_domain,
|
|
jboolean throwError, TRAPS) {
|
|
// Security Note:
|
|
// The Java level wrapper will perform the necessary security check allowing
|
|
// us to pass the NULL as the initiating class loader. The VM is responsible for
|
|
// the checkPackageAccess relative to the initiating class loader via the
|
|
// protection_domain. The protection_domain is passed as NULL by the java code
|
|
// if there is no security manager in 3-arg Class.forName().
|
|
Klass* klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL);
|
|
|
|
KlassHandle klass_handle(THREAD, klass);
|
|
// Check if we should initialize the class
|
|
if (init && klass_handle->oop_is_instance()) {
|
|
klass_handle->initialize(CHECK_NULL);
|
|
}
|
|
return (jclass) JNIHandles::make_local(env, klass_handle->java_mirror());
|
|
}
|
|
|
|
|
|
// Method ///////////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
|
|
JVMWrapper("JVM_InvokeMethod");
|
|
Handle method_handle;
|
|
if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
|
|
method_handle = Handle(THREAD, JNIHandles::resolve(method));
|
|
Handle receiver(THREAD, JNIHandles::resolve(obj));
|
|
objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
|
|
oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
|
|
jobject res = JNIHandles::make_local(env, result);
|
|
if (JvmtiExport::should_post_vm_object_alloc()) {
|
|
oop ret_type = java_lang_reflect_Method::return_type(method_handle());
|
|
assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!");
|
|
if (java_lang_Class::is_primitive(ret_type)) {
|
|
// Only for primitive type vm allocates memory for java object.
|
|
// See box() method.
|
|
JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
|
|
}
|
|
}
|
|
return res;
|
|
} else {
|
|
THROW_0(vmSymbols::java_lang_StackOverflowError());
|
|
}
|
|
JVM_END
|
|
|
|
|
|
JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
|
|
JVMWrapper("JVM_NewInstanceFromConstructor");
|
|
oop constructor_mirror = JNIHandles::resolve(c);
|
|
objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
|
|
oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
|
|
jobject res = JNIHandles::make_local(env, result);
|
|
if (JvmtiExport::should_post_vm_object_alloc()) {
|
|
JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
|
|
}
|
|
return res;
|
|
JVM_END
|
|
|
|
// Atomic ///////////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
JVM_LEAF(jboolean, JVM_SupportsCX8())
|
|
JVMWrapper("JVM_SupportsCX8");
|
|
return VM_Version::supports_cx8();
|
|
JVM_END
|
|
|
|
// DTrace ///////////////////////////////////////////////////////////////////
|
|
|
|
JVM_ENTRY(jint, JVM_DTraceGetVersion(JNIEnv* env))
|
|
JVMWrapper("JVM_DTraceGetVersion");
|
|
return (jint)JVM_TRACING_DTRACE_VERSION;
|
|
JVM_END
|
|
|
|
JVM_ENTRY(jlong,JVM_DTraceActivate(
|
|
JNIEnv* env, jint version, jstring module_name, jint providers_count,
|
|
JVM_DTraceProvider* providers))
|
|
JVMWrapper("JVM_DTraceActivate");
|
|
return DTraceJSDT::activate(
|
|
version, module_name, providers_count, providers, THREAD);
|
|
JVM_END
|
|
|
|
JVM_ENTRY(jboolean,JVM_DTraceIsProbeEnabled(JNIEnv* env, jmethodID method))
|
|
JVMWrapper("JVM_DTraceIsProbeEnabled");
|
|
return DTraceJSDT::is_probe_enabled(method);
|
|
JVM_END
|
|
|
|
JVM_ENTRY(void,JVM_DTraceDispose(JNIEnv* env, jlong handle))
|
|
JVMWrapper("JVM_DTraceDispose");
|
|
DTraceJSDT::dispose(handle);
|
|
JVM_END
|
|
|
|
JVM_ENTRY(jboolean,JVM_DTraceIsSupported(JNIEnv* env))
|
|
JVMWrapper("JVM_DTraceIsSupported");
|
|
return DTraceJSDT::is_supported();
|
|
JVM_END
|
|
|
|
// Returns an array of all live Thread objects (VM internal JavaThreads,
|
|
// jvmti agent threads, and JNI attaching threads are skipped)
|
|
// See CR 6404306 regarding JNI attaching threads
|
|
JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
|
|
ResourceMark rm(THREAD);
|
|
ThreadsListEnumerator tle(THREAD, false, false);
|
|
JvmtiVMObjectAllocEventCollector oam;
|
|
|
|
int num_threads = tle.num_threads();
|
|
objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NULL);
|
|
objArrayHandle threads_ah(THREAD, r);
|
|
|
|
for (int i = 0; i < num_threads; i++) {
|
|
Handle h = tle.get_threadObj(i);
|
|
threads_ah->obj_at_put(i, h());
|
|
}
|
|
|
|
return (jobjectArray) JNIHandles::make_local(env, threads_ah());
|
|
JVM_END
|
|
|
|
|
|
// Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
|
|
// Return StackTraceElement[][], each element is the stack trace of a thread in
|
|
// the corresponding entry in the given threads array
|
|
JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
|
|
JVMWrapper("JVM_DumpThreads");
|
|
JvmtiVMObjectAllocEventCollector oam;
|
|
|
|
// Check if threads is null
|
|
if (threads == NULL) {
|
|
THROW_(vmSymbols::java_lang_NullPointerException(), 0);
|
|
}
|
|
|
|
objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
|
|
objArrayHandle ah(THREAD, a);
|
|
int num_threads = ah->length();
|
|
// check if threads is non-empty array
|
|
if (num_threads == 0) {
|
|
THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
|
|
}
|
|
|
|
// check if threads is not an array of objects of Thread class
|
|
Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass();
|
|
if (k != SystemDictionary::Thread_klass()) {
|
|
THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
|
|
}
|
|
|
|
ResourceMark rm(THREAD);
|
|
|
|
GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
|
|
for (int i = 0; i < num_threads; i++) {
|
|
oop thread_obj = ah->obj_at(i);
|
|
instanceHandle h(THREAD, (instanceOop) thread_obj);
|
|
thread_handle_array->append(h);
|
|
}
|
|
|
|
Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
|
|
return (jobjectArray)JNIHandles::make_local(env, stacktraces());
|
|
|
|
JVM_END
|
|
|
|
// JVM monitoring and management support
|
|
JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version))
|
|
return Management::get_jmm_interface(version);
|
|
JVM_END
|
|
|
|
// com.sun.tools.attach.VirtualMachine agent properties support
|
|
//
|
|
// Initialize the agent properties with the properties maintained in the VM
|
|
JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
|
|
JVMWrapper("JVM_InitAgentProperties");
|
|
ResourceMark rm;
|
|
|
|
Handle props(THREAD, JNIHandles::resolve_non_null(properties));
|
|
|
|
PUTPROP(props, "sun.java.command", Arguments::java_command());
|
|
PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
|
|
PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
|
|
return properties;
|
|
JVM_END
|
|
|
|
JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
|
|
{
|
|
JVMWrapper("JVM_GetEnclosingMethodInfo");
|
|
JvmtiVMObjectAllocEventCollector oam;
|
|
|
|
if (ofClass == NULL) {
|
|
return NULL;
|
|
}
|
|
Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
|
|
// Special handling for primitive objects
|
|
if (java_lang_Class::is_primitive(mirror())) {
|
|
return NULL;
|
|
}
|
|
Klass* k = java_lang_Class::as_Klass(mirror());
|
|
if (!k->oop_is_instance()) {
|
|
return NULL;
|
|
}
|
|
instanceKlassHandle ik_h(THREAD, k);
|
|
int encl_method_class_idx = ik_h->enclosing_method_class_index();
|
|
if (encl_method_class_idx == 0) {
|
|
return NULL;
|
|
}
|
|
objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::Object_klass(), 3, CHECK_NULL);
|
|
objArrayHandle dest(THREAD, dest_o);
|
|
Klass* enc_k = ik_h->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
|
|
dest->obj_at_put(0, enc_k->java_mirror());
|
|
int encl_method_method_idx = ik_h->enclosing_method_method_index();
|
|
if (encl_method_method_idx != 0) {
|
|
Symbol* sym = ik_h->constants()->symbol_at(
|
|
extract_low_short_from_int(
|
|
ik_h->constants()->name_and_type_at(encl_method_method_idx)));
|
|
Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
|
|
dest->obj_at_put(1, str());
|
|
sym = ik_h->constants()->symbol_at(
|
|
extract_high_short_from_int(
|
|
ik_h->constants()->name_and_type_at(encl_method_method_idx)));
|
|
str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
|
|
dest->obj_at_put(2, str());
|
|
}
|
|
return (jobjectArray) JNIHandles::make_local(dest());
|
|
}
|
|
JVM_END
|
|
|
|
JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size))
|
|
{
|
|
memset(info, 0, info_size);
|
|
|
|
info->jvm_version = Abstract_VM_Version::jvm_version();
|
|
info->update_version = 0; /* 0 in HotSpot Express VM */
|
|
info->special_update_version = 0; /* 0 in HotSpot Express VM */
|
|
|
|
// when we add a new capability in the jvm_version_info struct, we should also
|
|
// consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat
|
|
// counter defined in runtimeService.cpp.
|
|
info->is_attachable = AttachListener::is_attach_supported();
|
|
}
|
|
JVM_END
|