author | iignatyev |
Mon, 10 Dec 2018 11:04:55 -0800 | |
changeset 52934 | 8deeb7bba516 |
parent 52356 | 19c4a3eec4d7 |
child 54847 | 59ea39bb2809 |
permissions | -rw-r--r-- |
50113 | 1 |
/* |
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* Copyright (c) 2016, 2018, 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/javaClasses.inline.hpp" |
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#include "classfile/symbolTable.hpp" |
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#include "jfr/jni/jfrGetAllEventClasses.hpp" |
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#include "jfr/jni/jfrJavaSupport.hpp" |
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#include "jfr/support/jfrEventClass.hpp" |
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#include "oops/instanceKlass.hpp" |
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#include "memory/allocation.inline.hpp" |
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#include "memory/resourceArea.hpp" |
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#include "runtime/handles.inline.hpp" |
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#include "runtime/mutexLocker.hpp" |
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#include "runtime/safepoint.hpp" |
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#include "runtime/thread.inline.hpp" |
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#include "utilities/growableArray.hpp" |
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#include "utilities/stack.inline.hpp" |
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// incremented during class unloading (safepoint) for each unloaded event class |
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static jlong unloaded_event_classes = 0; |
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jlong JfrEventClasses::unloaded_event_classes_count() { |
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return unloaded_event_classes; |
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} |
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void JfrEventClasses::increment_unloaded_event_class() { |
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// incremented during class unloading (safepoint) for each unloaded event class |
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assert(SafepointSynchronize::is_at_safepoint(), "invariant"); |
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++unloaded_event_classes; |
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} |
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static jobject empty_java_util_arraylist = NULL; |
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static oop new_java_util_arraylist(TRAPS) { |
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DEBUG_ONLY(JfrJavaSupport::check_java_thread_in_vm(THREAD)); |
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JavaValue result(T_OBJECT); |
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JfrJavaArguments args(&result, "java/util/ArrayList", "<init>", "()V", CHECK_NULL); |
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JfrJavaSupport::new_object(&args, CHECK_NULL); |
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return (oop)result.get_jobject(); |
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} |
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static bool initialize(TRAPS) { |
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static bool initialized = false; |
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if (!initialized) { |
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unloaded_event_classes = 0; |
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assert(NULL == empty_java_util_arraylist, "invariant"); |
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const oop array_list = new_java_util_arraylist(CHECK_false); |
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empty_java_util_arraylist = JfrJavaSupport::global_jni_handle(array_list, THREAD); |
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initialized = empty_java_util_arraylist != NULL; |
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} |
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return initialized; |
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} |
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/* |
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* Abstract klasses are filtered out unconditionally. |
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* If a klass is not yet initialized, i.e yet to run its <clinit> |
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* it is also filtered out so we don't accidentally |
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* trigger initialization. |
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*/ |
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static bool is_whitelisted(const Klass* k) { |
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assert(k != NULL, "invariant"); |
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return !(k->is_abstract() || k->should_be_initialized()); |
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} |
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static void fill_klasses(GrowableArray<const void*>& event_subklasses, const Klass* event_klass, Thread* thread) { |
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assert(event_subklasses.length() == 0, "invariant"); |
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assert(event_klass != NULL, "invariant"); |
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DEBUG_ONLY(JfrJavaSupport::check_java_thread_in_vm(thread)); |
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Stack<const Klass*, mtTracing> mark_stack; |
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52356
19c4a3eec4d7
8213211: [BACKOUT] Allow Klass::_subklass and _next_sibling to have unloaded classes
coleenp
parents:
52334
diff
changeset
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MutexLocker ml(Compile_lock, thread); |
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mark_stack.push(event_klass->subklass()); |
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while (!mark_stack.is_empty()) { |
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const Klass* const current = mark_stack.pop(); |
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assert(current != NULL, "null element in stack!"); |
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if (is_whitelisted(current)) { |
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event_subklasses.append(current); |
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} |
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// subclass (depth) |
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const Klass* next_klass = current->subklass(); |
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if (next_klass != NULL) { |
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mark_stack.push(next_klass); |
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} |
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// siblings (breadth) |
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next_klass = current->next_sibling(); |
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if (next_klass != NULL) { |
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mark_stack.push(next_klass); |
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} |
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} |
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assert(mark_stack.is_empty(), "invariant"); |
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} |
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static void transform_klasses_to_local_jni_handles(GrowableArray<const void*>& event_subklasses, Thread* thread) { |
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assert(event_subklasses.is_nonempty(), "invariant"); |
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DEBUG_ONLY(JfrJavaSupport::check_java_thread_in_vm(thread)); |
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for (int i = 0; i < event_subklasses.length(); ++i) { |
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const InstanceKlass* k = static_cast<const InstanceKlass*>(event_subklasses.at(i)); |
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assert(is_whitelisted(k), "invariant"); |
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event_subklasses.at_put(i, JfrJavaSupport::local_jni_handle(k->java_mirror(), thread)); |
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} |
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} |
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static const int initial_size_growable_array = 64; |
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jobject JfrEventClasses::get_all_event_classes(TRAPS) { |
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DEBUG_ONLY(JfrJavaSupport::check_java_thread_in_vm(THREAD)); |
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initialize(THREAD); |
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assert(empty_java_util_arraylist != NULL, "should have been setup already!"); |
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52334
a181612f0715
8203629: Produce events in the JDK without a dependency on jdk.jfr
egahlin
parents:
52311
diff
changeset
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static const char jdk_jfr_event_name[] = "jdk/internal/event/Event"; |
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unsigned int unused_hash = 0; |
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Symbol* const event_klass_name = SymbolTable::lookup_only(jdk_jfr_event_name, sizeof jdk_jfr_event_name - 1, unused_hash); |
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if (NULL == event_klass_name) { |
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// not loaded yet |
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return empty_java_util_arraylist; |
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} |
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const Klass* const klass = SystemDictionary::resolve_or_null(event_klass_name, THREAD); |
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assert(klass != NULL, "invariant"); |
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assert(JdkJfrEvent::is(klass), "invariant"); |
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19c4a3eec4d7
8213211: [BACKOUT] Allow Klass::_subklass and _next_sibling to have unloaded classes
coleenp
parents:
52334
diff
changeset
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if (klass->subklass() == NULL) { |
19c4a3eec4d7
8213211: [BACKOUT] Allow Klass::_subklass and _next_sibling to have unloaded classes
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parents:
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return empty_java_util_arraylist; |
19c4a3eec4d7
8213211: [BACKOUT] Allow Klass::_subklass and _next_sibling to have unloaded classes
coleenp
parents:
52334
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} |
19c4a3eec4d7
8213211: [BACKOUT] Allow Klass::_subklass and _next_sibling to have unloaded classes
coleenp
parents:
52334
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ResourceMark rm(THREAD); |
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GrowableArray<const void*> event_subklasses(THREAD, initial_size_growable_array); |
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19c4a3eec4d7
8213211: [BACKOUT] Allow Klass::_subklass and _next_sibling to have unloaded classes
coleenp
parents:
52334
diff
changeset
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fill_klasses(event_subklasses, klass, THREAD); |
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52356
19c4a3eec4d7
8213211: [BACKOUT] Allow Klass::_subklass and _next_sibling to have unloaded classes
coleenp
parents:
52334
diff
changeset
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if (event_subklasses.is_empty()) { |
19c4a3eec4d7
8213211: [BACKOUT] Allow Klass::_subklass and _next_sibling to have unloaded classes
coleenp
parents:
52334
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return empty_java_util_arraylist; |
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} |
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transform_klasses_to_local_jni_handles(event_subklasses, THREAD); |
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Handle h_array_list(THREAD, new_java_util_arraylist(THREAD)); |
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assert(h_array_list.not_null(), "invariant"); |
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static const char add_method_name[] = "add"; |
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static const char add_method_signature[] = "(Ljava/lang/Object;)Z"; |
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const Klass* const array_list_klass = JfrJavaSupport::klass(empty_java_util_arraylist); |
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assert(array_list_klass != NULL, "invariant"); |
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const Symbol* const add_method_sym = SymbolTable::lookup(add_method_name, sizeof add_method_name - 1, THREAD); |
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assert(add_method_sym != NULL, "invariant"); |
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const Symbol* const add_method_sig_sym = SymbolTable::lookup(add_method_signature, sizeof add_method_signature - 1, THREAD); |
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assert(add_method_signature != NULL, "invariant"); |
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JavaValue result(T_BOOLEAN); |
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for (int i = 0; i < event_subklasses.length(); ++i) { |
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const jclass clazz = (const jclass)event_subklasses.at(i); |
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assert(JdkJfrEvent::is_subklass(clazz), "invariant"); |
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JfrJavaArguments args(&result, array_list_klass, add_method_sym, add_method_sig_sym); |
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args.set_receiver(h_array_list()); |
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args.push_jobject(clazz); |
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JfrJavaSupport::call_virtual(&args, THREAD); |
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if (HAS_PENDING_EXCEPTION || JNI_FALSE == result.get_jboolean()) { |
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return empty_java_util_arraylist; |
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} |
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} |
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return JfrJavaSupport::local_jni_handle(h_array_list(), THREAD); |
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} |