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 30 extern "C" { 31 32 /* ============================================================================= */ 33 34 static jlong timeout = 0; 35 static int fakeUserData = 0, objCounter = 0; 36 static jvmtiEnv* st_jvmti = NULL; 37 static const char *storage_data = "local_storage_data"; 38 static void *storage_ptr = NULL; 39 static const char* debugeeClassSignature = "Lnsk/jvmti/IterateOverObjectsReachableFromObject/iterobjreachobj004;"; 40 static const char* objectFieldName = "object"; 41 42 /* ============================================================================= */ 43 44 jvmtiIterationControl JNICALL 45 objectReferenceCallback( jvmtiObjectReferenceKind reference_kind, 46 jlong class_tag, 47 jlong size, 48 jlong* tag_ptr, 49 jlong referrer_tag, 50 jint referrer_index, 51 void* user_data) { 52 53 objCounter++; 54 55 if (!NSK_JVMTI_VERIFY(st_jvmti->SetEnvironmentLocalStorage(storage_data))) { 56 nsk_jvmti_setFailStatus(); 57 } 58 59 if (!NSK_JVMTI_VERIFY(st_jvmti->GetEnvironmentLocalStorage(&storage_ptr))) { 60 nsk_jvmti_setFailStatus(); 61 } 62 63 /* Iterate over only first object */ 64 return JVMTI_ITERATION_ABORT; 65 } 66 67 /* ============================================================================= */ 68 69 /** Agent algorithm. */ 70 static void JNICALL 71 agentProc(jvmtiEnv* jvmti, JNIEnv* jni, void* arg) { 72 73 NSK_DISPLAY0("Wait for debugee start\n"); 74 if (!NSK_VERIFY(nsk_jvmti_waitForSync(timeout))) 75 return; 76 77 do { 78 jclass debugeeClass = NULL; 79 jfieldID objectField = NULL; 80 jobject object = NULL; 81 82 NSK_DISPLAY1("Find debugee class: %s\n", debugeeClassSignature); 83 debugeeClass = nsk_jvmti_classBySignature(debugeeClassSignature); 84 if (debugeeClass == NULL) { 85 nsk_jvmti_setFailStatus(); 86 break; 87 } 88 89 NSK_DISPLAY1("Find static field in debugee class: %s\n", objectFieldName); 90 if (!NSK_JNI_VERIFY(jni, (objectField = jni->GetStaticFieldID( 91 debugeeClass, objectFieldName, debugeeClassSignature)) != NULL)) { 92 nsk_jvmti_setFailStatus(); 93 break; 94 } 95 96 NSK_DISPLAY1("Find value of static field in debugee class: %s\n", objectFieldName); 97 if (!NSK_JNI_VERIFY(jni, (object = 98 jni->GetStaticObjectField(debugeeClass, objectField)) != NULL)) { 99 nsk_jvmti_setFailStatus(); 100 break; 101 } 102 103 NSK_DISPLAY0("Calling IterateOverObjectsReachableFromObject with filter JVMTI_HEAP_OBJECT_EITHER\n"); 104 { 105 if (!NSK_JVMTI_VERIFY(jvmti->IterateOverObjectsReachableFromObject( 106 object, objectReferenceCallback, &fakeUserData))) { 107 nsk_jvmti_setFailStatus(); 108 } 109 } 110 111 if (objCounter == 0) { 112 NSK_COMPLAIN0("IterateOverObjectsReachableFromObject call had not visited any object\n"); 113 nsk_jvmti_setFailStatus(); 114 } 115 116 if (storage_data != storage_ptr) { 117 NSK_COMPLAIN2("Local storage address was corrupted: %p ,\n\texpected value: %p\n", 118 storage_ptr, storage_data); 119 nsk_jvmti_setFailStatus(); 120 } 121 122 if (strcmp(storage_data, (char *)storage_ptr) != 0) { 123 NSK_COMPLAIN2("Local storage was corrupted: %s ,\n\texpected value: %s\n", 124 (char *)storage_ptr, storage_data ); 125 nsk_jvmti_setFailStatus(); 126 } 127 } while (0); 128 129 NSK_DISPLAY0("Let debugee to finish\n"); 130 if (!NSK_VERIFY(nsk_jvmti_resumeSync())) 131 return; 132 } 133 134 /* ============================================================================= */ 135 136 /** Agent library initialization. */ 137 #ifdef STATIC_BUILD 138 JNIEXPORT jint JNICALL Agent_OnLoad_iterobjreachobj004(JavaVM *jvm, char *options, void *reserved) { 139 return Agent_Initialize(jvm, options, reserved); 140 } 141 JNIEXPORT jint JNICALL Agent_OnAttach_iterobjreachobj004(JavaVM *jvm, char *options, void *reserved) { 142 return Agent_Initialize(jvm, options, reserved); 143 } 144 JNIEXPORT jint JNI_OnLoad_iterobjreachobj004(JavaVM *jvm, char *options, void *reserved) { 145 return JNI_VERSION_1_8; 146 } 147 #endif 148 jint Agent_Initialize(JavaVM *jvm, char *options, void *reserved) { 149 jvmtiEnv* jvmti = NULL; 150 151 if (!NSK_VERIFY(nsk_jvmti_parseOptions(options))) 152 return JNI_ERR; 153 154 timeout = nsk_jvmti_getWaitTime() * 60 * 1000; 155 156 if (!NSK_VERIFY((jvmti = 157 nsk_jvmti_createJVMTIEnv(jvm, reserved)) != NULL)) 158 return JNI_ERR; 159 160 /* save pointer to environment to use it in callbacks */ 161 st_jvmti = jvmti; 162 163 { 164 jvmtiCapabilities caps; 165 166 memset(&caps, 0, sizeof(caps)); 167 caps.can_tag_objects = 1; 168 if (!NSK_JVMTI_VERIFY(jvmti->AddCapabilities(&caps))) { 169 return JNI_ERR; 170 } 171 } 172 173 if (!NSK_VERIFY(nsk_jvmti_setAgentProc(agentProc, NULL))) 174 return JNI_ERR; 175 176 return JNI_OK; 177 } 178 179 /* ============================================================================= */ 180 181 }