1 /* 2 * Copyright (c) 2005, 2014, 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. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 #include "jni.h" 27 #include "jni_util.h" 28 #include "jvm.h" 29 #include "jdk_util.h" 30 31 #include "sun_misc_Version.h" 32 33 #ifndef CHECK_ERROR_RETURN 34 #define CHECK_ERROR_RETURN(x) if ((x) == -1) return; 35 #endif 36 37 #ifndef CHECK_ERROR_RETURNFALSE 38 #define CHECK_ERROR_RETURNFALSE(x) if ((x) == -1) return JNI_FALSE; 39 #endif 40 41 char jvm_special_version = '\0'; 42 char jdk_special_version = '\0'; 43 static int setStaticIntField(JNIEnv* env, jclass cls, const char* name, jint value) 44 { 45 char errmsg[100]; 46 jfieldID fid; 47 fid = (*env)->GetStaticFieldID(env, cls, name, "I"); 48 if (fid != 0) { 49 (*env)->SetStaticIntField(env, cls, fid, value); 50 } else { 51 sprintf(errmsg, "Static int field %s not found", name); 52 JNU_ThrowInternalError(env, errmsg); 53 return -1; 54 } 55 return 0; 56 } 57 58 typedef void (JNICALL *GetJvmVersionInfo_fp)(JNIEnv*, jvm_version_info*, size_t); 59 60 JNIEXPORT jboolean JNICALL 61 Java_sun_misc_Version_getJvmVersionInfo(JNIEnv *env, jclass cls) 62 { 63 jvm_version_info info; 64 GetJvmVersionInfo_fp func_p; 65 66 if (!JDK_InitJvmHandle()) { 67 JNU_ThrowInternalError(env, "Handle for JVM not found for symbol lookup"); 68 return JNI_FALSE; 69 } 70 func_p = (GetJvmVersionInfo_fp) JDK_FindJvmEntry("JVM_GetVersionInfo"); 71 if (func_p == NULL) { 72 return JNI_FALSE; 73 } 74 75 (*func_p)(env, &info, sizeof(info)); 76 CHECK_ERROR_RETURNFALSE(setStaticIntField(env, cls, "jvm_major_version", 77 JVM_VERSION_MAJOR(info.jvm_version))); 78 CHECK_ERROR_RETURNFALSE(setStaticIntField(env, cls, "jvm_minor_version", 79 JVM_VERSION_MINOR(info.jvm_version))); 80 CHECK_ERROR_RETURNFALSE(setStaticIntField(env, cls, "jvm_micro_version", 81 JVM_VERSION_MICRO(info.jvm_version))); 82 CHECK_ERROR_RETURNFALSE(setStaticIntField(env, cls, "jvm_build_number", 83 JVM_VERSION_BUILD(info.jvm_version))); 84 CHECK_ERROR_RETURNFALSE(setStaticIntField(env, cls, "jvm_update_version", 85 info.update_version)); 86 jvm_special_version = info.special_update_version; 87 88 return JNI_TRUE; 89 } 90 91 JNIEXPORT jstring JNICALL 92 Java_sun_misc_Version_getJvmSpecialVersion(JNIEnv *env, jclass cls) { 93 char s[2]; 94 jstring special; 95 s[0] = jvm_special_version; 96 s[1] = '\0'; 97 special = (*env)->NewStringUTF(env, s); 98 return special; 99 } 100 101 JNIEXPORT void JNICALL 102 Java_sun_misc_Version_getJdkVersionInfo(JNIEnv *env, jclass cls) 103 { 104 jdk_version_info info; 105 106 JDK_GetVersionInfo0(&info, sizeof(info)); 107 CHECK_ERROR_RETURN(setStaticIntField(env, cls, "jdk_major_version", 108 JDK_VERSION_MAJOR(info.jdk_version))); 109 CHECK_ERROR_RETURN(setStaticIntField(env, cls, "jdk_minor_version", 110 JDK_VERSION_MINOR(info.jdk_version))); 111 CHECK_ERROR_RETURN(setStaticIntField(env, cls, "jdk_micro_version", 112 JDK_VERSION_MICRO(info.jdk_version))); 113 CHECK_ERROR_RETURN(setStaticIntField(env, cls, "jdk_build_number", 114 JDK_VERSION_BUILD(info.jdk_version))); 115 CHECK_ERROR_RETURN(setStaticIntField(env, cls, "jdk_update_version", 116 info.update_version)); 117 jdk_special_version = info.special_update_version; 118 } 119 120 JNIEXPORT jstring JNICALL 121 Java_sun_misc_Version_getJdkSpecialVersion(JNIEnv *env, jclass cls) { 122 char s[2]; 123 jstring special; 124 s[0] = jdk_special_version; 125 s[1] = '\0'; 126 special = (*env)->NewStringUTF(env, s); 127 return special; 128 }