/*

 * Copyright (c) 2005, 2011, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

#include <windows.h>

#include <stdlib.h>

#include <string.h>

#include <Psapi.h>

#include "jni.h"

#include "jni_util.h"

#include "sun_tools_attach_AttachProviderImpl.h"

/*

 * Class:     sun_tools_attach_AttachProviderImpl

 * Method:    tempPath

 * Signature: ()Ljava/lang/String;

 */

JNIEXPORT jstring JNICALL

Java_sun_tools_attach_AttachProviderImpl_tempPath(JNIEnv *env, jclass cls)

{

    char buf[256];

    DWORD bufLen, actualLen;

    jstring result = NULL;

    bufLen = sizeof(buf) / sizeof(char);

    actualLen = GetTempPath(bufLen, buf);

    if (actualLen > 0) {

        char* bufP = buf;

        if (actualLen > bufLen) {

            actualLen += sizeof(char);

            bufP = (char*)malloc(actualLen * sizeof(char));

            actualLen = GetTempPath(actualLen, bufP);

        }

        if (actualLen > 0) {

            result = JNU_NewStringPlatform(env, bufP);

        }

        if (bufP != buf) {

            free((void*)bufP);

        }

    }

    return result;

}

/*

 * Class:     sun_tools_attach_AttachProviderImpl

 * Method:    volumeFlags

 * Signature: ()J

 */

JNIEXPORT jlong JNICALL

Java_sun_tools_attach_AttachProviderImpl_volumeFlags(JNIEnv *env, jclass cls, jstring str)

{

    jboolean isCopy;

    const char* volume;

    DWORD result = 0;

    volume = JNU_GetStringPlatformChars(env, str, &isCopy);

    if (volume != NULL) {

        DWORD componentLen, flags;

        BOOL res = GetVolumeInformation(volume,

                                        NULL,

                                        0,

                                        NULL,

                                        &componentLen,

                                        &flags,

                                        NULL,

                                        0);

       if (res != 0) {

           result = flags;

       }

       if (isCopy) {

            JNU_ReleaseStringPlatformChars(env, str, volume);

       }

    }

    return result;

}

/*

 * Class:     sun_tools_attach_AttachProviderImpl

 * Method:    enumProcesses

 * Signature: ([JI)I

 */

JNIEXPORT jint JNICALL

Java_sun_tools_attach_AttachProviderImpl_enumProcesses(JNIEnv *env, jclass cls,

                                                       jintArray arr, jint max)

{

    DWORD size, bytesReturned;

    DWORD* ptr;

    jint result = 0;

    size = max * sizeof(DWORD);

    ptr = (DWORD*)malloc(size);

    if (ptr != NULL) {

        BOOL res = EnumProcesses(ptr, size, &bytesReturned);

        if (res != 0) {

            result = (jint)(bytesReturned / sizeof(DWORD));

            (*env)->SetIntArrayRegion(env, arr, 0, (jsize)result, (jint*)ptr);

        }

        free((void*)ptr);

    }

    return result;

}

/*

 * Class:     sun_tools_attach_AttachProviderImpl

 * Method:    isLibraryLoadedByProcess

 * Signature: (I[Ljava/lang/String;)Z

 */

JNIEXPORT jboolean JNICALL

Java_sun_tools_attach_AttachProviderImpl_isLibraryLoadedByProcess(JNIEnv *env, jclass cls,

                                                                  jstring str, jint processId)

{

    HANDLE hProcess;

    jboolean isCopy;

    const char* lib;

    DWORD size, bytesReturned;

    HMODULE* ptr;

    jboolean result = JNI_FALSE;

    hProcess = OpenProcess(PROCESS_QUERY_INFORMATION |

                           PROCESS_VM_READ,

                           FALSE, (DWORD)processId);

    if (hProcess == NULL) {

        return JNI_FALSE;

    }

    lib = JNU_GetStringPlatformChars(env, str, &isCopy);

    if (lib == NULL) {

        CloseHandle(hProcess);

        return JNI_FALSE;

    }

    /*

     * Enumerate the modules that the process has opened and see if we have a

     * match.

     */

    size = 1024 * sizeof(HMODULE);

    ptr = (HMODULE*)malloc(size);

    if (ptr != NULL) {

        BOOL res = EnumProcessModules(hProcess, ptr, size, &bytesReturned);

        if (res != 0) {

            int count = bytesReturned / sizeof(HMODULE);

            int i = 0;

            while (i < count) {

                char base[256];

                BOOL res = GetModuleBaseName(hProcess, ptr[i], base, sizeof(base));

                if (res != 0) {

                    if (strcmp(base, lib) == 0) {

                      result = JNI_TRUE;

                      break;

                    }

                }

                i++;

            }

        }

        free((void*)ptr);

    }

    if (isCopy) {

        JNU_ReleaseStringPlatformChars(env, str, lib);

    }

    CloseHandle(hProcess);

    return result;

}