30899
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/*
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* Copyright (c) 2014, 2015, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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#include "jni.h"
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#include "jvm.h"
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#include "jni_util.h"
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#include "java_lang_ProcessHandleImpl.h"
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#include "java_lang_ProcessHandleImpl_Info.h"
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#include <windows.h>
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#include <tlhelp32.h>
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static void getStatInfo(JNIEnv *env, HANDLE handle, jobject jinfo);
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static void getCmdlineInfo(JNIEnv *env, HANDLE handle, jobject jinfo);
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static void procToUser( JNIEnv *env, HANDLE handle, jobject jinfo);
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/**************************************************************
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* Implementation of ProcessHandleImpl_Info native methods.
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*/
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/* Field id for jString 'command' in java.lang.ProcessHandle.Info */
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static jfieldID ProcessHandleImpl_Info_commandID;
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/* Field id for jString[] 'arguments' in java.lang.ProcessHandle.Info */
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static jfieldID ProcessHandleImpl_Info_argumentsID;
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/* Field id for jlong 'totalTime' in java.lang.ProcessHandle.Info */
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static jfieldID ProcessHandleImpl_Info_totalTimeID;
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/* Field id for jlong 'startTime' in java.lang.ProcessHandle.Info */
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static jfieldID ProcessHandleImpl_Info_startTimeID;
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/* Field id for jString 'accountName' in java.lang.ProcessHandleImpl.UserPrincipal */
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static jfieldID ProcessHandleImpl_Info_userID;
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/**************************************************************
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* Static method to initialize field IDs.
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*
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* Class: java_lang_ProcessHandleImpl_Info
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* Method: initIDs
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* Signature: ()V
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*/
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JNIEXPORT void JNICALL Java_java_lang_ProcessHandleImpl_00024Info_initIDs
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(JNIEnv *env, jclass clazz) {
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CHECK_NULL(ProcessHandleImpl_Info_commandID = (*env)->GetFieldID(env,
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clazz, "command", "Ljava/lang/String;"));
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CHECK_NULL(ProcessHandleImpl_Info_argumentsID = (*env)->GetFieldID(env,
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clazz, "arguments", "[Ljava/lang/String;"));
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CHECK_NULL(ProcessHandleImpl_Info_totalTimeID = (*env)->GetFieldID(env,
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clazz, "totalTime", "J"));
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CHECK_NULL(ProcessHandleImpl_Info_startTimeID = (*env)->GetFieldID(env,
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clazz, "startTime", "J"));
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CHECK_NULL(ProcessHandleImpl_Info_userID = (*env)->GetFieldID(env,
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clazz, "user", "Ljava/lang/String;"));
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}
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/*
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* Block until a child process exits and return its exit code.
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*/
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JNIEXPORT jint JNICALL
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Java_java_lang_ProcessHandleImpl_waitForProcessExit0(JNIEnv* env,
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jclass junk,
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jlong jpid,
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jboolean reapStatus) {
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DWORD pid = (DWORD)jpid;
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DWORD exitValue = -1;
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HANDLE handle = OpenProcess(SYNCHRONIZE | PROCESS_QUERY_LIMITED_INFORMATION,
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FALSE, pid);
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if (handle == NULL) {
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return exitValue; // No process with that pid is alive
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}
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do {
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if (!GetExitCodeProcess(handle, &exitValue)) {
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JNU_ThrowByNameWithLastError(env,
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"java/lang/Runtime", "GetExitCodeProcess");
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break;
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}
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if (exitValue == STILL_ACTIVE) {
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HANDLE events[2];
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events[0] = handle;
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events[1] = JVM_GetThreadInterruptEvent();
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if (WaitForMultipleObjects(sizeof(events)/sizeof(events[0]), events,
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FALSE, /* Wait for ANY event */
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INFINITE) /* Wait forever */
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== WAIT_FAILED) {
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JNU_ThrowByNameWithLastError(env,
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"java/lang/Runtime", "WaitForMultipleObjects");
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break;
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}
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}
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} while (exitValue == STILL_ACTIVE);
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CloseHandle(handle); // Ignore return code
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return exitValue;
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}
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/*
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* Returns the pid of the caller.
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*
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* Class: java_lang_ProcessHandleImpl
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* Method: getCurrentPid0
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* Signature: ()J
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*/
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JNIEXPORT jlong JNICALL Java_java_lang_ProcessHandleImpl_getCurrentPid0
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(JNIEnv *env, jclass clazz) {
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DWORD pid = GetCurrentProcessId();
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return (jlong)pid;
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}
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/*
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* Returns the parent pid of the requested pid.
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*
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* Class: java_lang_ProcessHandleImpl
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* Method: parent0
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* Signature: (J)J
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*/
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JNIEXPORT jlong JNICALL Java_java_lang_ProcessHandleImpl_parent0
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(JNIEnv *env, jclass clazz, jlong jpid) {
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DWORD ppid = -1;
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DWORD wpid = (DWORD)jpid;
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PROCESSENTRY32 pe32;
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HANDLE hProcessSnap;
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// Take a snapshot of all processes in the system.
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hProcessSnap = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0);
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if (hProcessSnap == INVALID_HANDLE_VALUE) {
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JNU_ThrowByName(env,
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"java/lang/RuntimeException", "snapshot not available");
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return -1;
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}
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// Retrieve information about the first process,
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pe32.dwSize = sizeof (PROCESSENTRY32);
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if (Process32First(hProcessSnap, &pe32)) {
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// Now walk the snapshot of processes, and
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do {
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if (wpid == pe32.th32ProcessID) {
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ppid = pe32.th32ParentProcessID;
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break;
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}
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} while (Process32Next(hProcessSnap, &pe32));
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} else {
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JNU_ThrowByName(env,
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"java/lang/RuntimeException", "snapshot not available");
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return -1;
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}
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CloseHandle(hProcessSnap); // Ignore return code
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return (jlong)ppid;
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}
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/*
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* Returns the children of the requested pid and optionally each parent.
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*
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* Class: java_lang_ProcessHandleImpl
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* Method: getChildPids
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* Signature: (J[J[J)I
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*/
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JNIEXPORT jint JNICALL Java_java_lang_ProcessHandleImpl_getProcessPids0
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(JNIEnv *env, jclass clazz, jlong jpid,
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jlongArray jarray, jlongArray jparentArray) {
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HANDLE hProcessSnap;
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PROCESSENTRY32 pe32;
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DWORD ppid = (DWORD)jpid;
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size_t count = 0;
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jlong* pids = NULL;
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jlong* ppids = NULL;
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size_t parentArraySize = 0;
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size_t arraySize = 0;
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arraySize = (*env)->GetArrayLength(env, jarray);
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JNU_CHECK_EXCEPTION_RETURN(env, -1);
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if (jparentArray != NULL) {
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parentArraySize = (*env)->GetArrayLength(env, jparentArray);
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JNU_CHECK_EXCEPTION_RETURN(env, -1);
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if (arraySize != parentArraySize) {
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JNU_ThrowIllegalArgumentException(env, "array sizes not equal");
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return 0;
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}
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}
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// Take a snapshot of all processes in the system.
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hProcessSnap = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0);
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if (hProcessSnap == INVALID_HANDLE_VALUE) {
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JNU_ThrowByName(env,
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"java/lang/RuntimeException", "snapshot not available");
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return 0;
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}
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// Retrieve information about the first process,
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pe32.dwSize = sizeof (PROCESSENTRY32);
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if (Process32First(hProcessSnap, &pe32)) {
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do { // Block to break out of on Exception
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pids = (*env)->GetLongArrayElements(env, jarray, NULL);
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if (pids == NULL) {
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break;
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}
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if (jparentArray != NULL) {
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ppids = (*env)->GetLongArrayElements(env, jparentArray, NULL);
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if (ppids == NULL) {
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break;
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}
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}
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// Now walk the snapshot of processes, and
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// save information about each process in turn
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do {
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if (ppid == 0 ||
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(pe32.th32ParentProcessID > 0
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&& (pe32.th32ParentProcessID == ppid))) {
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if (count < arraySize) {
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// Only store if it fits
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pids[count] = (jlong)pe32.th32ProcessID;
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if (ppids != NULL) {
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// Store the parentPid
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ppids[count] = (jlong) pe32.th32ParentProcessID;
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}
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}
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count++; // Count to tabulate size needed
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}
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} while (Process32Next(hProcessSnap, &pe32));
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} while (0);
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if (pids != NULL) {
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(*env)->ReleaseLongArrayElements(env, jarray, pids, 0);
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}
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if (ppids != NULL) {
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(*env)->ReleaseLongArrayElements(env, jparentArray, ppids, 0);
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}
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} else {
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JNU_ThrowByName(env,
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"java/lang/RuntimeException", "snapshot not available");
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return 0;
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}
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CloseHandle(hProcessSnap);
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// If more pids than array had size for; count will be greater than array size
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return (jint)count;
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}
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/*
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* Destroy the process.
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*
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* Class: java_lang_ProcessHandleImpl
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* Method: destroy0
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* Signature: (Z)V
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*/
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JNIEXPORT jboolean JNICALL Java_java_lang_ProcessHandleImpl_destroy0
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(JNIEnv *env, jclass clazz, jlong jpid, jboolean force) {
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DWORD pid = (DWORD)jpid;
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HANDLE handle = OpenProcess(PROCESS_TERMINATE, FALSE, pid);
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if (handle != NULL) {
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TerminateProcess(handle, 1);
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CloseHandle(handle); // Ignore return code
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return JNI_TRUE;
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}
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return JNI_FALSE;
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}
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/*
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* Class: java_lang_ProcessHandleImpl
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* Method: isAlive0
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* Signature: (J)Z
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*/
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JNIEXPORT jboolean JNICALL Java_java_lang_ProcessHandleImpl_isAlive0
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(JNIEnv *env, jclass clazz, jlong jpid) {
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DWORD pid = (DWORD)jpid;
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jboolean ret = JNI_FALSE;
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HANDLE handle =
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OpenProcess(THREAD_QUERY_INFORMATION | PROCESS_QUERY_LIMITED_INFORMATION,
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FALSE, pid);
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if (handle != NULL) {
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DWORD dwExitStatus;
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GetExitCodeProcess(handle, &dwExitStatus);
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CloseHandle(handle); // Ignore return code
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ret = (dwExitStatus == STILL_ACTIVE);
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}
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return ret;
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}
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/**
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* Assemble a 64 bit value from two 32 bit values.
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*/
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static jlong jlong_from(jint high, jint low) {
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jlong result = 0;
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result = ((jlong)high << 32) | ((0x000000000ffffffff) & (jlong)low);
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return result;
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}
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/*
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* Fill in the Info object from the OS information about the process.
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*
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* Class: java_lang_ProcessHandleImpl
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* Method: info0
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* Signature: (J)V
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*/
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JNIEXPORT void JNICALL Java_java_lang_ProcessHandleImpl_00024Info_info0
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(JNIEnv *env, jobject jinfo, jlong jpid) {
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DWORD pid = (DWORD)jpid;
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int ret = 0;
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HANDLE handle =
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OpenProcess(THREAD_QUERY_INFORMATION | PROCESS_QUERY_LIMITED_INFORMATION,
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FALSE, pid);
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if (handle == NULL) {
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return;
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}
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getStatInfo(env, handle, jinfo);
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getCmdlineInfo(env, handle, jinfo);
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procToUser(env, handle, jinfo);
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CloseHandle(handle); // Ignore return code
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}
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/**
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* Read /proc/<pid>/stat and fill in the fields of the Info object.
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* The executable name, plus the user, system, and start times are gathered.
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*/
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static void getStatInfo(JNIEnv *env, HANDLE handle, jobject jinfo) {
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FILETIME CreationTime;
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FILETIME ExitTime;
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FILETIME KernelTime;
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FILETIME UserTime;
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jlong userTime; // nanoseconds
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jlong totalTime; // nanoseconds
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jlong startTime; // nanoseconds
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UserTime.dwHighDateTime = 0;
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UserTime.dwLowDateTime = 0;
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KernelTime.dwHighDateTime = 0;
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KernelTime.dwLowDateTime = 0;
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CreationTime.dwHighDateTime = 0;
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CreationTime.dwLowDateTime = 0;
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358 |
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if (GetProcessTimes(handle, &CreationTime, &ExitTime, &KernelTime, &UserTime)) {
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userTime = jlong_from(UserTime.dwHighDateTime, UserTime.dwLowDateTime);
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361 |
totalTime = jlong_from( KernelTime.dwHighDateTime, KernelTime.dwLowDateTime);
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totalTime = (totalTime + userTime) * 100; // convert sum to nano-seconds
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363 |
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startTime = jlong_from(CreationTime.dwHighDateTime,
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CreationTime.dwLowDateTime) / 10000;
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366 |
startTime -= 11644473600000L; // Rebase Epoch from 1601 to 1970
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367 |
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368 |
(*env)->SetLongField(env, jinfo,
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ProcessHandleImpl_Info_totalTimeID, totalTime);
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JNU_CHECK_EXCEPTION(env);
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(*env)->SetLongField(env, jinfo,
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ProcessHandleImpl_Info_startTimeID, startTime);
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JNU_CHECK_EXCEPTION(env);
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}
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}
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376 |
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377 |
static void getCmdlineInfo(JNIEnv *env, HANDLE handle, jobject jinfo) {
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378 |
char exeName[1024];
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379 |
int bufsize = sizeof exeName;
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|
380 |
jstring commandObj;
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381 |
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382 |
if (QueryFullProcessImageName(handle, 0, exeName, &bufsize)) {
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383 |
commandObj = (*env)->NewStringUTF(env, exeName);
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384 |
CHECK_NULL(commandObj);
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(*env)->SetObjectField(env, jinfo,
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ProcessHandleImpl_Info_commandID, commandObj);
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387 |
}
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388 |
}
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|
389 |
|
|
390 |
static void procToUser( JNIEnv *env, HANDLE handle, jobject jinfo) {
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|
391 |
#define TOKEN_LEN 256
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|
392 |
DWORD token_len = TOKEN_LEN;
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|
393 |
char token_buf[TOKEN_LEN];
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|
394 |
TOKEN_USER *token_user = (TOKEN_USER*)token_buf;
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395 |
HANDLE tokenHandle;
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396 |
WCHAR domain[255];
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397 |
WCHAR name[255];
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|
398 |
DWORD domainLen = sizeof(domain);
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|
399 |
DWORD nameLen = sizeof(name);
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400 |
SID_NAME_USE use;
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|
401 |
jstring s;
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|
402 |
int ret;
|
|
403 |
|
|
404 |
if (!OpenProcessToken(handle, TOKEN_READ, &tokenHandle)) {
|
|
405 |
return;
|
|
406 |
}
|
|
407 |
|
|
408 |
ret = GetTokenInformation(tokenHandle, TokenUser, token_user,
|
|
409 |
token_len, &token_len);
|
|
410 |
CloseHandle(tokenHandle); // always close handle
|
|
411 |
if (!ret) {
|
|
412 |
JNU_ThrowByNameWithLastError(env,
|
|
413 |
"java/lang/RuntimeException", "GetTokenInformation");
|
|
414 |
return;
|
|
415 |
}
|
|
416 |
|
|
417 |
if (LookupAccountSidW(NULL, token_user->User.Sid, &name[0], &nameLen,
|
|
418 |
&domain[0], &domainLen, &use) == 0) {
|
|
419 |
// Name not available
|
|
420 |
return;
|
|
421 |
}
|
|
422 |
|
|
423 |
s = (*env)->NewString(env, (const jchar *)name, (jsize)wcslen(name));
|
|
424 |
CHECK_NULL(s);
|
|
425 |
(*env)->SetObjectField(env, jinfo, ProcessHandleImpl_Info_userID, s);
|
|
426 |
}
|