-
Notifications
You must be signed in to change notification settings - Fork 35
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
Use current StartupHelper from Liftoff. (#149)
This should help Mac compatibility, as noted on the Discord.
- Loading branch information
1 parent
88400cc
commit 230ea61
Showing
2 changed files
with
180 additions
and
70 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
179 changes: 179 additions & 0 deletions
179
core/src/com/ray3k/skincomposer/desktop/StartupHelper.java
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,179 @@ | ||
/* | ||
* Copyright 2020 damios | ||
* | ||
* Licensed under the Apache License, Version 2.0 (the "License"); | ||
* you may not use this file except in compliance with the License. | ||
* You may obtain a copy of the License at: | ||
* http://www.apache.org/licenses/LICENSE-2.0 | ||
* | ||
* Unless required by applicable law or agreed to in writing, software | ||
* distributed under the License is distributed on an "AS IS" BASIS, | ||
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
* See the License for the specific language governing permissions and | ||
* limitations under the License. | ||
*/ | ||
//Note, the above license and copyright applies to this file only. | ||
|
||
package com.ray3k.skincomposer.desktop; | ||
|
||
import org.lwjgl.system.macosx.LibC; | ||
|
||
import java.io.BufferedReader; | ||
import java.io.File; | ||
import java.io.InputStreamReader; | ||
import java.lang.management.ManagementFactory; | ||
import java.util.ArrayList; | ||
|
||
/** | ||
* Adds some utilities to ensure that the JVM was started with the | ||
* {@code -XstartOnFirstThread} argument, which is required on macOS for LWJGL 3 | ||
* to function. Also helps on Windows when users have names with characters from | ||
* outside the Latin alphabet, a common cause of startup crashes. | ||
* <br> | ||
* <a href="https://jvm-gaming.org/t/starting-jvm-on-mac-with-xstartonfirstthread-programmatically/57547">Based on this java-gaming.org post by kappa</a> | ||
* @author damios | ||
*/ | ||
public class StartupHelper { | ||
|
||
private static final String JVM_RESTARTED_ARG = "jvmIsRestarted"; | ||
|
||
private StartupHelper() { | ||
throw new UnsupportedOperationException(); | ||
} | ||
|
||
/** | ||
* Starts a new JVM if the application was started on macOS without the | ||
* {@code -XstartOnFirstThread} argument. This also includes some code for | ||
* Windows, for the case where the user's home directory includes certain | ||
* non-Latin-alphabet characters (without this code, most LWJGL3 apps fail | ||
* immediately for those users). Returns whether a new JVM was started and | ||
* thus no code should be executed. | ||
* <p> | ||
* <u>Usage:</u> | ||
* | ||
* <pre><code> | ||
* public static void main(String... args) { | ||
* if (StartupHelper.startNewJvmIfRequired(true)) return; // This handles macOS support and helps on Windows. | ||
* // after this is the actual main method code | ||
* } | ||
* </code></pre> | ||
* | ||
* @param redirectOutput | ||
* whether the output of the new JVM should be rerouted to the | ||
* old JVM, so it can be accessed in the same place; keeps the | ||
* old JVM running if enabled | ||
* @return whether a new JVM was started and thus no code should be executed | ||
* in this one | ||
*/ | ||
public static boolean startNewJvmIfRequired(boolean redirectOutput) { | ||
String osName = System.getProperty("os.name").toLowerCase(); | ||
if (!osName.contains("mac")) { | ||
if (osName.contains("windows")) { | ||
// Here, we are trying to work around an issue with how LWJGL3 loads its extracted .dll files. | ||
// By default, LWJGL3 extracts to the directory specified by "java.io.tmpdir", which is usually the user's home. | ||
// If the user's name has non-ASCII (or some non-alphanumeric) characters in it, that would fail. | ||
// By extracting to the relevant "ProgramData" folder, which is usually "C:\ProgramData", we avoid this. | ||
System.setProperty("java.io.tmpdir", System.getenv("ProgramData") + "/libGDX-temp"); | ||
} | ||
return false; | ||
} | ||
|
||
// There is no need for -XstartOnFirstThread on Graal native image | ||
if (!System.getProperty("org.graalvm.nativeimage.imagecode", "").isEmpty()) { | ||
return false; | ||
} | ||
|
||
long pid = LibC.getpid(); | ||
|
||
// check whether -XstartOnFirstThread is enabled | ||
if ("1".equals(System.getenv("JAVA_STARTED_ON_FIRST_THREAD_" + pid))) { | ||
return false; | ||
} | ||
|
||
// check whether the JVM was previously restarted | ||
// avoids looping, but most certainly leads to a crash | ||
if ("true".equals(System.getProperty(JVM_RESTARTED_ARG))) { | ||
System.err.println( | ||
"There was a problem evaluating whether the JVM was started with the -XstartOnFirstThread argument."); | ||
return false; | ||
} | ||
|
||
// Restart the JVM with -XstartOnFirstThread | ||
ArrayList<String> jvmArgs = new ArrayList<>(); | ||
String separator = System.getProperty("file.separator"); | ||
// The following line is used assuming you target Java 8, the minimum for LWJGL3. | ||
String javaExecPath = System.getProperty("java.home") + separator + "bin" + separator + "java"; | ||
// If targeting Java 9 or higher, you could use the following instead of the above line: | ||
//String javaExecPath = ProcessHandle.current().info().command().orElseThrow(); | ||
|
||
if (!(new File(javaExecPath)).exists()) { | ||
System.err.println( | ||
"A Java installation could not be found. If you are distributing this app with a bundled JRE, be sure to set the -XstartOnFirstThread argument manually!"); | ||
return false; | ||
} | ||
|
||
jvmArgs.add(javaExecPath); | ||
jvmArgs.add("-XstartOnFirstThread"); | ||
jvmArgs.add("-D" + JVM_RESTARTED_ARG + "=true"); | ||
jvmArgs.addAll(ManagementFactory.getRuntimeMXBean().getInputArguments()); | ||
jvmArgs.add("-cp"); | ||
jvmArgs.add(System.getProperty("java.class.path")); | ||
String mainClass = System.getenv("JAVA_MAIN_CLASS_" + pid); | ||
if (mainClass == null) { | ||
StackTraceElement[] trace = Thread.currentThread().getStackTrace(); | ||
if (trace.length > 0) { | ||
mainClass = trace[trace.length - 1].getClassName(); | ||
} else { | ||
System.err.println("The main class could not be determined."); | ||
return false; | ||
} | ||
} | ||
jvmArgs.add(mainClass); | ||
|
||
try { | ||
if (!redirectOutput) { | ||
ProcessBuilder processBuilder = new ProcessBuilder(jvmArgs); | ||
processBuilder.start(); | ||
} else { | ||
Process process = (new ProcessBuilder(jvmArgs)) | ||
.redirectErrorStream(true).start(); | ||
BufferedReader processOutput = new BufferedReader( | ||
new InputStreamReader(process.getInputStream())); | ||
String line; | ||
|
||
while ((line = processOutput.readLine()) != null) { | ||
System.out.println(line); | ||
} | ||
|
||
process.waitFor(); | ||
} | ||
} catch (Exception e) { | ||
System.err.println("There was a problem restarting the JVM"); | ||
e.printStackTrace(); | ||
} | ||
|
||
return true; | ||
} | ||
|
||
/** | ||
* Starts a new JVM if the application was started on macOS without the | ||
* {@code -XstartOnFirstThread} argument. Returns whether a new JVM was | ||
* started and thus no code should be executed. Redirects the output of the | ||
* new JVM to the old one. | ||
* <p> | ||
* <u>Usage:</u> | ||
* | ||
* <pre> | ||
* public static void main(String... args) { | ||
* if (StartupHelper.startNewJvmIfRequired()) return; // This handles macOS support and helps on Windows. | ||
* // the actual main method code | ||
* } | ||
* </pre> | ||
* | ||
* @return whether a new JVM was started and thus no code should be executed | ||
* in this one | ||
*/ | ||
public static boolean startNewJvmIfRequired() { | ||
return startNewJvmIfRequired(true); | ||
} | ||
} |