IDEA-190226 Get rid of using current approach for OSProcessUtil#getCurrentProcessId()

platform/platform-impl/src/com/intellij/execution/process/OSProcessUtil.java

@@ -10,7 +10,6 @@ import com.pty4j.windows.WinPtyProcess;
 import org.jetbrains.annotations.NotNull;
 import org.jvnet.winp.WinProcess;
 
-import java.lang.management.ManagementFactory;
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
@@ -112,13 +111,16 @@ public class OSProcessUtil {
   }
 
   private static String getCurrentProcessId() {
-    try {
-      String name = ManagementFactory.getRuntimeMXBean().getName();
-      return name.split("@")[0];
+    int pid;
+
+    if (SystemInfo.isWindows) {
+      pid = WinProcessManager.getCurrentProcessId();
     }
-    catch (Exception e) {
-      return "-1";
+    else {
+      pid = UnixProcessManager.getCurrentProcessId();
     }
+
+    return String.valueOf(pid);
   }
 
   public static String getApplicationPid() {
@@ -126,7 +128,7 @@ public class OSProcessUtil {
       ourPid = getCurrentProcessId();
     }
 
-    return String.valueOf(ourPid);
+    return ourPid;
   }
 
   /** @deprecated trivial; use {@link #getProcessList()} directly (to be removed in IDEA 2019) */

platform/platform-impl/src/com/intellij/util/Restarter.java

@@ -3,6 +3,7 @@ package com.intellij.util;
 
 import com.intellij.execution.configurations.PathEnvironmentVariableUtil;
 import com.intellij.execution.process.UnixProcessManager;
+import com.intellij.execution.process.WinProcessManager;
 import com.intellij.ide.actions.CreateDesktopEntryAction;
 import com.intellij.jna.JnaLoader;
 import com.intellij.openapi.application.PathManager;
@@ -113,7 +114,7 @@ public class Restarter {
     Kernel32 kernel32 = Native.loadLibrary("kernel32", Kernel32.class);
     Shell32 shell32 = Native.loadLibrary("shell32", Shell32.class);
 
-    int pid = kernel32.GetCurrentProcessId();
+    int pid = WinProcessManager.getCurrentProcessId();
     IntByReference argc = new IntByReference();
     Pointer argvPtr = shell32.CommandLineToArgvW(kernel32.GetCommandLineW(), argc);
     String[] argv = getRestartArgv(argvPtr.getWideStringArray(0, argc.getValue()));

platform/util/src/com/intellij/execution/process/WinProcessManager.java

@@ -6,6 +6,7 @@ import com.intellij.openapi.util.SystemInfo;
 import com.intellij.openapi.util.io.FileUtil;
 import com.intellij.openapi.util.text.StringUtil;
 import com.intellij.util.ReflectionUtil;
+import com.sun.jna.Native;
 import com.sun.jna.Pointer;
 import com.sun.jna.platform.win32.Kernel32;
 import com.sun.jna.platform.win32.WinNT;
@@ -17,7 +18,7 @@ import static com.intellij.util.ObjectUtils.assertNotNull;
  *
  * @author Alexey.Ushakov
  */
-class WinProcessManager {
+public class WinProcessManager {
   private static final Logger LOG = Logger.getInstance(WinProcessManager.class);
 
   private WinProcessManager() { }
@@ -42,6 +43,11 @@ class WinProcessManager {
     throw new IllegalStateException("Unable to get PID from instance of " + process.getClass() + ", OS: " + SystemInfo.OS_NAME);
   }
 
+  public static int getCurrentProcessId() {
+    Kernel32 kernel32 = Native.loadLibrary("kernel32", Kernel32.class);
+    return kernel32.GetCurrentProcessId();
+  }
+
   public static boolean kill(Process process, boolean tree) {
     return kill(-1, process, tree);
   }
@@ -64,7 +70,7 @@ class WinProcessManager {
       String output = FileUtil.loadTextAndClose(p.getInputStream());
       int res = p.waitFor();
 
-      if (res != 0 && (process == null || process.isAlive())) {
+      if (res != 0 && (process == null || isAlive(process))) {
         LOG.warn(StringUtil.join(cmdArray, " ") + " failed: " + output);
         return false;
       }
@@ -79,4 +85,13 @@ class WinProcessManager {
     }
     return false;
   }
+
+  private static boolean isAlive(Process process) {
+    try {
+      process.exitValue();
+      return false;
+    } catch(IllegalThreadStateException e) {
+      return true;
+    }
+  }
 }