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 jvmtiEnv* st_jvmti = NULL; 36 static const char *storage_data = "local_storage_data"; 37 static void *storage_ptr = NULL; 38 static const char debugeeClassSignature[] = "Lnsk/jvmti/IterateOverInstancesOfClass/iterinstcls006;"; 39 40 /* ============================================================================= */ 41 42 jvmtiIterationControl JNICALL 43 heapObjectCallback(jlong class_tag, 44 jlong size, 45 jlong* tag_ptr, 46 void* storage_data) { 47 48 if (!NSK_JVMTI_VERIFY(st_jvmti->SetEnvironmentLocalStorage(storage_data))) { 49 nsk_jvmti_setFailStatus(); 50 } 51 52 if (!NSK_JVMTI_VERIFY(st_jvmti->GetEnvironmentLocalStorage(&storage_ptr))) { 53 nsk_jvmti_setFailStatus(); 54 } 55 56 /* Iterate over only first object */ 57 return JVMTI_ITERATION_ABORT; 58 } 59 60 /* ============================================================================= */ 61 62 /** Agent algorithm. */ 63 static void JNICALL 64 agentProc(jvmtiEnv* jvmti, JNIEnv* jni, void* arg) { 65 66 NSK_DISPLAY0("Wait for debugee start\n"); 67 if (!NSK_VERIFY(nsk_jvmti_waitForSync(timeout))) 68 return; 69 70 do { 71 jclass debugeeClass = NULL; 72 73 NSK_DISPLAY1("Find debugee class: %s\n", debugeeClassSignature); 74 debugeeClass = nsk_jvmti_classBySignature(debugeeClassSignature); 75 if (debugeeClass == NULL) { 76 nsk_jvmti_setFailStatus(); 77 break; 78 } 79 80 NSK_DISPLAY0("Calling IterateOverInstancesOfClass with filter JVMTI_HEAP_OBJECT_EITHER\n"); 81 { 82 if (!NSK_JVMTI_VERIFY( 83 jvmti->IterateOverInstancesOfClass(debugeeClass, 84 JVMTI_HEAP_OBJECT_EITHER, 85 heapObjectCallback, 86 (void *) storage_data))) { 87 nsk_jvmti_setFailStatus(); 88 } 89 } 90 91 if (storage_data != storage_ptr) { 92 NSK_COMPLAIN2("Local storage address was corrupted: %p ,\n\texpected value: %p\n", 93 storage_ptr, storage_data); 94 nsk_jvmti_setFailStatus(); 95 } 96 97 if (strcmp(storage_data, (char *)storage_ptr) != 0) { 98 NSK_COMPLAIN2("Local storage was corrupted: %s ,\n\texpected value: %s\n", 99 (char *)storage_ptr, storage_data); 100 nsk_jvmti_setFailStatus(); 101 } 102 } while (0); 103 104 NSK_DISPLAY0("Let debugee to finish\n"); 105 if (!NSK_VERIFY(nsk_jvmti_resumeSync())) 106 return; 107 } 108 109 /* ============================================================================= */ 110 111 /** Agent library initialization. */ 112 #ifdef STATIC_BUILD 113 JNIEXPORT jint JNICALL Agent_OnLoad_iterinstcls006(JavaVM *jvm, char *options, void *reserved) { 114 return Agent_Initialize(jvm, options, reserved); 115 } 116 JNIEXPORT jint JNICALL Agent_OnAttach_iterinstcls006(JavaVM *jvm, char *options, void *reserved) { 117 return Agent_Initialize(jvm, options, reserved); 118 } 119 JNIEXPORT jint JNI_OnLoad_iterinstcls006(JavaVM *jvm, char *options, void *reserved) { 120 return JNI_VERSION_1_8; 121 } 122 #endif 123 jint Agent_Initialize(JavaVM *jvm, char *options, void *reserved) { 124 jvmtiEnv* jvmti = NULL; 125 126 if (!NSK_VERIFY(nsk_jvmti_parseOptions(options))) 127 return JNI_ERR; 128 129 timeout = nsk_jvmti_getWaitTime() * 60 * 1000; 130 131 if (!NSK_VERIFY((jvmti = 132 nsk_jvmti_createJVMTIEnv(jvm, reserved)) != NULL)) 133 return JNI_ERR; 134 135 /* save pointer to environment to use it in callbacks */ 136 st_jvmti = jvmti; 137 138 { 139 jvmtiCapabilities caps; 140 141 memset(&caps, 0, sizeof(caps)); 142 caps.can_tag_objects = 1; 143 if (!NSK_JVMTI_VERIFY(jvmti->AddCapabilities(&caps))) { 144 return JNI_ERR; 145 } 146 } 147 148 if (!NSK_VERIFY(nsk_jvmti_setAgentProc(agentProc, NULL))) 149 return JNI_ERR; 150 151 return JNI_OK; 152 } 153 154 /* ============================================================================= */ 155 156 }