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 static void setStaticIntField(JNIEnv* env, jclass cls, const char* name, jint value)

    34 {

    35     jfieldID fid;

    36     fid = (*env)->GetStaticFieldID(env, cls, name, "I");

    37     if (fid != 0) {

    38         (*env)->SetStaticIntField(env, cls, fid, value);

    39     }

    40 }

    41 

    42 typedef void (JNICALL *GetJvmVersionInfo_fp)(JNIEnv*, jvm_version_info*, size_t);

    43 

    44 JNIEXPORT jboolean JNICALL

    45 Java_sun_misc_Version_getJvmVersionInfo(JNIEnv *env, jclass cls)

    46 {

    47     jvm_version_info info;

    48     GetJvmVersionInfo_fp func_p;

    49 

    50     if (!JDK_InitJvmHandle()) {

    51         JNU_ThrowInternalError(env, "Handle for JVM not found for symbol lookup");

    52         return JNI_FALSE;

    53     }

    54     func_p = (GetJvmVersionInfo_fp) JDK_FindJvmEntry("JVM_GetVersionInfo");

    55     if (func_p == NULL) {

    56         return JNI_FALSE;

    57     }

    58 

    59     (*func_p)(env, &info, sizeof(info));

    60     setStaticIntField(env, cls, "jvm_major_version", JVM_VERSION_MAJOR(info.jvm_version));

    61     JNU_CHECK_EXCEPTION_RETURN(env, JNI_FALSE);

    62     setStaticIntField(env, cls, "jvm_minor_version", JVM_VERSION_MINOR(info.jvm_version));

    63     JNU_CHECK_EXCEPTION_RETURN(env, JNI_FALSE);

    64     setStaticIntField(env, cls, "jvm_security_version", JVM_VERSION_SECURITY(info.jvm_version));

    65     JNU_CHECK_EXCEPTION_RETURN(env, JNI_FALSE);

    66     setStaticIntField(env, cls, "jvm_build_number", JVM_VERSION_BUILD(info.jvm_version));

    67     JNU_CHECK_EXCEPTION_RETURN(env, JNI_FALSE);

    68     setStaticIntField(env, cls, "jvm_patch_version", info.patch_version);

    69     JNU_CHECK_EXCEPTION_RETURN(env, JNI_FALSE);

    70 

    71     return JNI_TRUE;

    72 }

    73 

    74 JNIEXPORT void JNICALL

    75 Java_sun_misc_Version_getJdkVersionInfo(JNIEnv *env, jclass cls)

    76 {

    77     jdk_version_info info;

    78 

    79     JDK_GetVersionInfo0(&info, sizeof(info));

    80     setStaticIntField(env, cls, "jdk_major_version", JDK_VERSION_MAJOR(info.jdk_version));

    81     JNU_CHECK_EXCEPTION(env);

    82     setStaticIntField(env, cls, "jdk_minor_version", JDK_VERSION_MINOR(info.jdk_version));

    83     JNU_CHECK_EXCEPTION(env);

    84     setStaticIntField(env, cls, "jdk_security_version", JDK_VERSION_SECURITY(info.jdk_version));

    85     JNU_CHECK_EXCEPTION(env);

    86     setStaticIntField(env, cls, "jdk_build_number", JDK_VERSION_BUILD(info.jdk_version));

    87     JNU_CHECK_EXCEPTION(env);

    88     setStaticIntField(env, cls, "jdk_patch_version", info.patch_version);

    89     JNU_CHECK_EXCEPTION(env);

    90 }