1 /* 2 * Copyright (c) 2007, 2018, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 #include <jni.h> 24 #include <stdio.h> 25 #include <time.h> 26 #include "ExceptionCheckingJniEnv.hpp" 27 #include "jni_tools.h" 28 29 extern "C" { 30 31 static jfieldID objFieldId = NULL; 32 33 /* 34 * Class: nsk_share_gc_lock_jniref_JNIWeakGlobalRefLocker 35 * Method: criticalNative 36 * Signature: (JJ)V 37 */ 38 JNIEXPORT void JNICALL Java_nsk_share_gc_lock_jniref_JNIWeakGlobalRefLocker_criticalNative 39 (JNIEnv *jni_env, jobject o, jlong enterTime, jlong sleepTime) { 40 ExceptionCheckingJniEnvPtr jni(jni_env); 41 42 jobject obj; 43 jobject gref; 44 time_t start_time, current_time; 45 46 if (objFieldId == NULL) { 47 jclass klass = jni->GetObjectClass(o, TRACE_JNI_CALL); 48 objFieldId = jni->GetFieldID(klass, "obj", "Ljava/lang/Object;", TRACE_JNI_CALL); 49 } 50 obj = jni->GetObjectField(o, objFieldId, TRACE_JNI_CALL); 51 jni->SetObjectField(o, objFieldId, NULL, TRACE_JNI_CALL); 52 53 start_time = time(NULL); 54 enterTime /= 1000; 55 current_time = 0; 56 while (current_time - start_time < enterTime) { 57 gref = jni->NewWeakGlobalRef(obj, TRACE_JNI_CALL); 58 mssleep((long) sleepTime); 59 jni->DeleteWeakGlobalRef(gref, TRACE_JNI_CALL); 60 mssleep((long) sleepTime); 61 current_time = time(NULL); 62 } 63 jni->SetObjectField(o, objFieldId, obj, TRACE_JNI_CALL); 64 } 65 66 }