1 /* 2 * Copyright (c) 2004, 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 24 #include <string.h> 25 #include "jvmti.h" 26 #include "agent_common.h" 27 #include "jni_tools.h" 28 #include "jvmti_tools.h" 29 #include "JVMTITools.h" 30 31 extern "C" { 32 33 /* ============================================================================= */ 34 35 /* scaffold objects */ 36 static JNIEnv* jni = NULL; 37 static jvmtiEnv *jvmti = NULL; 38 static jlong timeout = 0; 39 static jrawMonitorID syncLock = NULL; 40 41 /* constant names */ 42 #define JVMTI_EVENT_COUNT (int)(JVMTI_MAX_EVENT_TYPE_VAL - JVMTI_MIN_EVENT_TYPE_VAL + 1) 43 #define EXPECTED_CLASS_NAME "nsk.jvmti.scenarios.events.EM06.em06t001a" 44 #define CLASS_LOADER_COUNT_PARAM "classLoaderCount" 45 46 static int classLoaderCount = 0; 47 static int classloadEventCount = 0; 48 static int classprepareEventCount = 0; 49 50 /* ============================================================================= */ 51 52 /* callbacks */ 53 54 void 55 handler(jvmtiEvent event, jvmtiEnv* jvmti, JNIEnv* jni_env, 56 jthread thread, jclass klass) { 57 58 jmethodID methodID; 59 jclass classObject; 60 jstring jclassName; 61 const char *className; 62 63 if (!NSK_JNI_VERIFY(jni_env, (classObject = 64 NSK_CPP_STUB2(GetObjectClass, jni_env, klass)) != NULL)) { 65 nsk_jvmti_setFailStatus(); 66 return; 67 } 68 69 if (!NSK_JNI_VERIFY(jni_env, (methodID = 70 NSK_CPP_STUB4(GetMethodID, jni_env, classObject, 71 "getName", "()Ljava/lang/String;")) != NULL)) { 72 nsk_jvmti_setFailStatus(); 73 return; 74 } 75 76 jclassName = (jstring) NSK_CPP_STUB3(CallObjectMethod, jni_env, klass, methodID); 77 78 className = NSK_CPP_STUB3(GetStringUTFChars, jni_env, jclassName, 0); 79 80 if ( className != NULL && (strcmp(className, EXPECTED_CLASS_NAME)==0) ) { 81 82 if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB2(RawMonitorEnter, jvmti, syncLock))) 83 nsk_jvmti_setFailStatus(); 84 85 switch (event) { 86 case JVMTI_EVENT_CLASS_LOAD: 87 classloadEventCount++; break; 88 case JVMTI_EVENT_CLASS_PREPARE: 89 classprepareEventCount++; break; 90 default: 91 NSK_COMPLAIN1("Unexpected event %s", TranslateEvent(event)); 92 nsk_jvmti_setFailStatus(); 93 } 94 95 if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB2(RawMonitorExit, jvmti, syncLock))) 96 nsk_jvmti_setFailStatus(); 97 98 } 99 100 NSK_CPP_STUB3(ReleaseStringUTFChars, jni_env, jclassName, className); 101 } 102 103 JNIEXPORT void JNICALL 104 cbClassLoad(jvmtiEnv* jvmti, JNIEnv* jni_env, jthread thread, jclass klass) { 105 106 handler(JVMTI_EVENT_CLASS_LOAD, jvmti, jni_env, thread, klass); 107 } 108 109 JNIEXPORT void JNICALL 110 cbClassPrepare(jvmtiEnv* jvmti, JNIEnv* jni_env, jthread thread, jclass klass) { 111 112 handler(JVMTI_EVENT_CLASS_PREPARE, jvmti, jni_env, thread, klass); 113 } 114 115 /* ============================================================================= */ 116 117 static int 118 enableEvent(jvmtiEventMode enable, jvmtiEvent event) { 119 if (!NSK_JVMTI_VERIFY( 120 NSK_CPP_STUB4(SetEventNotificationMode, jvmti, enable, 121 event, NULL))) { 122 nsk_jvmti_setFailStatus(); 123 return NSK_FALSE; 124 } 125 126 return NSK_TRUE; 127 } 128 129 /* ============================================================================= */ 130 131 /** 132 * Testcase: check tested events. 133 * - check if expected events received for each method 134 * 135 * Returns NSK_TRUE if test may continue; or NSK_FALSE for test break. 136 */ 137 int checkEvents() { 138 139 int result = NSK_TRUE; 140 141 if (classloadEventCount == classLoaderCount) { 142 NSK_DISPLAY1("Expected number of JVMTI_EVENT_CLASS_LOAD events %d\n", 143 classloadEventCount); 144 } else { 145 NSK_COMPLAIN2("Unexpected number of JVMTI_EVENT_CLASS_LOAD events %d\n\texpected value %d\n", 146 classloadEventCount, 147 classLoaderCount); 148 result = NSK_FALSE; 149 } 150 151 if (classprepareEventCount == classLoaderCount) { 152 NSK_DISPLAY1("Expected number of JVMTI_EVENT_CLASS_PREPARE events %d\n", 153 classloadEventCount); 154 } else { 155 NSK_COMPLAIN2("Unexpected number of JVMTI_EVENT_CLASS_PREPARE events %d\n\texpected value %d\n", 156 classprepareEventCount, 157 classLoaderCount); 158 result = NSK_FALSE; 159 } 160 161 return result; 162 } 163 164 /* ============================================================================= */ 165 166 static int 167 setCallBacks() { 168 jvmtiEventCallbacks eventCallbacks; 169 memset(&eventCallbacks, 0, sizeof(eventCallbacks)); 170 171 eventCallbacks.ClassLoad = cbClassLoad; 172 eventCallbacks.ClassPrepare = cbClassPrepare; 173 174 if (!NSK_JVMTI_VERIFY( 175 NSK_CPP_STUB3(SetEventCallbacks, jvmti, 176 &eventCallbacks, 177 sizeof(eventCallbacks)))) 178 return NSK_FALSE; 179 180 return NSK_TRUE; 181 } 182 183 /* ============================================================================= */ 184 185 /** Agent algorithm. */ 186 static void JNICALL 187 agentProc(jvmtiEnv* jvmti, JNIEnv* agentJNI, void* arg) { 188 189 if (!NSK_JVMTI_VERIFY( 190 NSK_CPP_STUB3(CreateRawMonitor, jvmti, "_syncLock", &syncLock))) { 191 nsk_jvmti_setFailStatus(); 192 return; 193 } 194 195 jni = agentJNI; 196 197 NSK_DISPLAY0("Wait for debuggee to become ready\n"); 198 if (!nsk_jvmti_waitForSync(timeout)) 199 return; 200 201 if (!setCallBacks()) { 202 return; 203 } 204 205 if (!enableEvent(JVMTI_ENABLE, JVMTI_EVENT_CLASS_LOAD) 206 || !enableEvent(JVMTI_ENABLE, JVMTI_EVENT_CLASS_PREPARE)) { 207 NSK_COMPLAIN0("Events could not be enabled"); 208 nsk_jvmti_setFailStatus(); 209 return; 210 } 211 212 NSK_DISPLAY0("Let debuggee to load class\n"); 213 if (!nsk_jvmti_resumeSync()) 214 return; 215 216 if (!nsk_jvmti_waitForSync(timeout)) 217 return; 218 219 if (!checkEvents()) { 220 nsk_jvmti_setFailStatus(); 221 } 222 223 if (!enableEvent(JVMTI_DISABLE, JVMTI_EVENT_CLASS_LOAD) 224 || !enableEvent(JVMTI_DISABLE, JVMTI_EVENT_CLASS_PREPARE)) { 225 NSK_COMPLAIN0("Events could not be disabled"); 226 nsk_jvmti_setFailStatus(); 227 } 228 229 NSK_DISPLAY0("Let debuggee to finish\n"); 230 if (!nsk_jvmti_resumeSync()) 231 return; 232 233 if (!NSK_JVMTI_VERIFY( 234 NSK_CPP_STUB2(DestroyRawMonitor, jvmti, syncLock))) 235 nsk_jvmti_setFailStatus(); 236 237 } 238 239 /* ============================================================================= */ 240 241 /** Agent library initialization. */ 242 #ifdef STATIC_BUILD 243 JNIEXPORT jint JNICALL Agent_OnLoad_em06t001(JavaVM *jvm, char *options, void *reserved) { 244 return Agent_Initialize(jvm, options, reserved); 245 } 246 JNIEXPORT jint JNICALL Agent_OnAttach_em06t001(JavaVM *jvm, char *options, void *reserved) { 247 return Agent_Initialize(jvm, options, reserved); 248 } 249 JNIEXPORT jint JNI_OnLoad_em06t001(JavaVM *jvm, char *options, void *reserved) { 250 return JNI_VERSION_1_8; 251 } 252 #endif 253 jint Agent_Initialize(JavaVM *jvm, char *options, void *reserved) { 254 255 if (!NSK_VERIFY(nsk_jvmti_parseOptions(options))) 256 return JNI_ERR; 257 258 timeout = nsk_jvmti_getWaitTime() * 60 * 1000; 259 classLoaderCount = nsk_jvmti_findOptionIntValue(CLASS_LOADER_COUNT_PARAM, 100); 260 261 if (!NSK_VERIFY((jvmti = nsk_jvmti_createJVMTIEnv(jvm, reserved)) != NULL)) 262 return JNI_ERR; 263 264 if (!NSK_VERIFY(nsk_jvmti_setAgentProc(agentProc, NULL))) 265 return JNI_ERR; 266 267 return JNI_OK; 268 } 269 270 /* ============================================================================= */ 271 272 273 }