1 /*
   2  * Copyright (c) 2005, 2015, 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 char jvm_special_version = '\0';
  34 char jdk_special_version = '\0';
  35 static void setStaticIntField(JNIEnv* env, jclass cls, const char* name, jint value)
  36 {
  37     jfieldID fid;
  38     fid = (*env)->GetStaticFieldID(env, cls, name, "I");
  39     if (fid != 0) {
  40         (*env)->SetStaticIntField(env, cls, fid, value);
  41     }
  42 }
  43 
  44 typedef void (JNICALL *GetJvmVersionInfo_fp)(JNIEnv*, jvm_version_info*, size_t);
  45 
  46 JNIEXPORT jboolean JNICALL
  47 Java_sun_misc_Version_getJvmVersionInfo(JNIEnv *env, jclass cls)
  48 {
  49     jvm_version_info info;
  50     GetJvmVersionInfo_fp func_p;
  51 
  52     if (!JDK_InitJvmHandle()) {
  53         JNU_ThrowInternalError(env, "Handle for JVM not found for symbol lookup");
  54         return JNI_FALSE;
  55     }
  56     func_p = (GetJvmVersionInfo_fp) JDK_FindJvmEntry("JVM_GetVersionInfo");
  57     if (func_p == NULL) {
  58         return JNI_FALSE;
  59     }
  60 
  61     (*func_p)(env, &info, sizeof(info));
  62     setStaticIntField(env, cls, "jvm_major_version", JVM_VERSION_MAJOR(info.jvm_version));
  63     JNU_CHECK_EXCEPTION_RETURN(env, JNI_FALSE);
  64     setStaticIntField(env, cls, "jvm_minor_version", JVM_VERSION_MINOR(info.jvm_version));
  65     JNU_CHECK_EXCEPTION_RETURN(env, JNI_FALSE);
  66     setStaticIntField(env, cls, "jvm_security_version", JVM_VERSION_SECURITY(info.jvm_version));
  67     JNU_CHECK_EXCEPTION_RETURN(env, JNI_FALSE);
  68     setStaticIntField(env, cls, "jvm_build_number", JVM_VERSION_BUILD(info.jvm_version));
  69     JNU_CHECK_EXCEPTION_RETURN(env, JNI_FALSE);
  70     setStaticIntField(env, cls, "jvm_update_version", info.update_version);
  71     JNU_CHECK_EXCEPTION_RETURN(env, JNI_FALSE);
  72     jvm_special_version = info.special_update_version;
  73 
  74     return JNI_TRUE;
  75 }
  76 
  77 JNIEXPORT jstring JNICALL
  78 Java_sun_misc_Version_getJvmSpecialVersion(JNIEnv *env, jclass cls) {
  79     char s[2];
  80     jstring special;
  81     s[0] = jvm_special_version;
  82     s[1] = '\0';
  83     special = (*env)->NewStringUTF(env, s);
  84     return special;
  85 }
  86 
  87 JNIEXPORT void JNICALL
  88 Java_sun_misc_Version_getJdkVersionInfo(JNIEnv *env, jclass cls)
  89 {
  90     jdk_version_info info;
  91 
  92     JDK_GetVersionInfo0(&info, sizeof(info));
  93     setStaticIntField(env, cls, "jdk_major_version", JDK_VERSION_MAJOR(info.jdk_version));
  94     JNU_CHECK_EXCEPTION(env);
  95     setStaticIntField(env, cls, "jdk_minor_version", JDK_VERSION_MINOR(info.jdk_version));
  96     JNU_CHECK_EXCEPTION(env);
  97     setStaticIntField(env, cls, "jdk_security_version", JDK_VERSION_SECURITY(info.jdk_version));
  98     JNU_CHECK_EXCEPTION(env);
  99     setStaticIntField(env, cls, "jdk_build_number", JDK_VERSION_BUILD(info.jdk_version));
 100     JNU_CHECK_EXCEPTION(env);
 101     setStaticIntField(env, cls, "jdk_update_version", info.update_version);
 102     JNU_CHECK_EXCEPTION(env);
 103     jdk_special_version = info.special_update_version;
 104 }
 105 
 106 JNIEXPORT jstring JNICALL
 107 Java_sun_misc_Version_getJdkSpecialVersion(JNIEnv *env, jclass cls) {
 108     char s[2];
 109     jstring special;
 110     s[0] = jdk_special_version;
 111     s[1] = '\0';
 112     special = (*env)->NewStringUTF(env, s);
 113     return special;
 114 }