1 /* 2 * Copyright (c) 2003, 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 <stdio.h> 25 #include <string.h> 26 #include "jvmti.h" 27 #include "agent_common.h" 28 #include "JVMTITools.h" 29 30 extern "C" { 31 32 33 #define PASSED 0 34 #define STATUS_FAILED 2 35 #define FAILED_NO_OOM 3 36 #define MAX_CHUNK 1024*1024 37 38 // Limit total allocations to 8Gb. 39 // Without this check we will loop forever if the OS does not 40 // limit virtual memory (this usually happens on mac). 41 #define MAX_CHUNK_COUNT 8*1024 42 43 static jvmtiEnv *jvmti = NULL; 44 static jint result = PASSED; 45 static jboolean printdump = JNI_FALSE; 46 47 #ifdef STATIC_BUILD 48 JNIEXPORT jint JNICALL Agent_OnLoad_alloc001(JavaVM *jvm, char *options, void *reserved) { 49 return Agent_Initialize(jvm, options, reserved); 50 } 51 JNIEXPORT jint JNICALL Agent_OnAttach_alloc001(JavaVM *jvm, char *options, void *reserved) { 52 return Agent_Initialize(jvm, options, reserved); 53 } 54 JNIEXPORT jint JNI_OnLoad_alloc001(JavaVM *jvm, char *options, void *reserved) { 55 return JNI_VERSION_1_8; 56 } 57 #endif 58 jint Agent_Initialize(JavaVM *jvm, char *options, void *reserved) { 59 jint res; 60 61 if (options != NULL && strcmp(options, "printdump") == 0) { 62 printdump = JNI_TRUE; 63 } 64 65 res = jvm->GetEnv((void **) &jvmti, JVMTI_VERSION_1_1); 66 if (res != JNI_OK || jvmti == NULL) { 67 printf("Wrong result of a valid call to GetEnv!\n"); 68 return JNI_ERR; 69 } 70 71 return JNI_OK; 72 } 73 74 JNIEXPORT jint JNICALL 75 Java_nsk_jvmti_Allocate_alloc001_check(JNIEnv *env, jclass cls) { 76 jvmtiError err; 77 size_t size; 78 void *prev = NULL; 79 void **mem; 80 int memCount = 1; 81 82 if (jvmti == NULL) { 83 printf("JVMTI client was not properly loaded!\n"); 84 return STATUS_FAILED; 85 } 86 87 if (printdump == JNI_TRUE) { 88 printf(">>> Null pointer check ...\n"); 89 } 90 err = jvmti->Allocate((jlong)1, NULL); 91 if (err != JVMTI_ERROR_NULL_POINTER) { 92 printf("Error expected: JVMTI_ERROR_NULL_POINTER, got: %s\n", 93 TranslateError(err)); 94 result = STATUS_FAILED; 95 } 96 if (printdump == JNI_TRUE) { 97 printf(">>> ... done\n"); 98 } 99 100 if (printdump == JNI_TRUE) { 101 printf(">>> Accessibility check ...\n"); 102 } 103 for (size = sizeof(mem); size <= MAX_CHUNK; size <<= 1) { 104 err = jvmti->Allocate(size, (unsigned char **)&mem); 105 if (err == JVMTI_ERROR_NONE) { 106 memset(mem, 0, size); 107 *mem = prev; 108 prev = mem; 109 } else if (err == JVMTI_ERROR_OUT_OF_MEMORY) { 110 break; 111 } else { 112 printf("(Allocate) Error expected: JVMTI_ERROR_NONE, got: %s\n", 113 TranslateError(err)); 114 result = STATUS_FAILED; 115 break; 116 } 117 } 118 if (printdump == JNI_TRUE) { 119 printf(">>> ... done\n"); 120 } 121 122 if (printdump == JNI_TRUE) { 123 printf(">>> Out of memory check ...\n"); 124 } 125 while (err != JVMTI_ERROR_OUT_OF_MEMORY) { 126 err = jvmti->Allocate((jlong)MAX_CHUNK, (unsigned char **)&mem); 127 if (err == JVMTI_ERROR_NONE) { 128 *mem = prev; 129 prev = mem; 130 memCount++; 131 if (memCount > MAX_CHUNK_COUNT) { 132 printf("Allocated %dMb. Virtual memory limit too high. Quit to avoid timeout.\n", memCount); 133 result = FAILED_NO_OOM; 134 break; 135 } 136 } else if (err == JVMTI_ERROR_OUT_OF_MEMORY) { 137 break; 138 } else { 139 printf("Error expected: JVMTI_ERROR_OUT_OF_MEMORY, got: %s\n", 140 TranslateError(err)); 141 result = STATUS_FAILED; 142 break; 143 } 144 145 if (printdump == JNI_TRUE && (memCount % 50 == 0) ) { 146 printf(">>> ... done (%dMb)\n", memCount); 147 } 148 } 149 if (printdump == JNI_TRUE) { 150 printf(">>> ... done (%dMb)\n", memCount); 151 } 152 153 if (printdump == JNI_TRUE) { 154 printf(">>> Deallocation ...\n"); 155 } 156 while (prev != NULL) { 157 mem = (void**) prev; 158 prev = *mem; 159 err = jvmti->Deallocate((unsigned char *)mem); 160 if (err != JVMTI_ERROR_NONE) { 161 printf("(Deallocate) Error expected: JVMTI_ERROR_NONE, got: %s\n", 162 TranslateError(err)); 163 result = STATUS_FAILED; 164 break; 165 } 166 } 167 if (printdump == JNI_TRUE) { 168 printf(">>> ... done\n"); 169 } 170 171 return result; 172 } 173 174 }