[native-image] windows: ProcessBuilder bug

[mbbee]

I'm getting the error below when i use ProcessBuilder in a native image.

Exception in thread "System-2" java.lang.NoClassDefFoundError: Ljava/io/IOException;
        at com.oracle.svm.jni.functions.JNIFunctions.FindClass(JNIFunctions.java:326)
        at java.lang.ProcessImpl.create(ProcessImpl.java)
        at java.lang.ProcessImpl.<init>(ProcessImpl.java:386)
        at java.lang.ProcessImpl.start(ProcessImpl.java:137)
        at java.lang.ProcessBuilder.start(ProcessBuilder.java:1029)
        at java.lang.Runtime.exec(Runtime.java:620)
        at java.lang.Runtime.exec(Runtime.java:450)
        at TestNativeImage.startCommandSimple(TestNativeImage.java:32)
        at TestNativeImage.main(TestNativeImage.java:22)

Same with eg Runtime.getRuntime().exec(commandStr, null, workingDir);

I'm using the native-image-maven-plugin version 1.0.0-rc15
thx

[cstancu]

@mbbee Java classes accessed via JNI need to be registered. See the JNI documentation for details.

[cstancu]

In your case you should add -H:JNIConfigurationFiles=jni-config.json to the native-image command, where jni-config.json contains at least:

[
  {
    "name" : "java.io.IOException"
  }
]

After that you may need to expand this config file with further classes/methods/fields accessed via JNI.

For an automated method of discovering all the elements accessed via JNI look at Assisted Configuration of Native Image Builds. I would suggest to build from source or wait for RC16 which is coming out soon since we have fixed a series of issues with the native-image-agent since RC15.

[mbbee]

the graalvm-ee-1.0.0-rc16-snapshot-windows-amd64 produces other strange errors when i try to run the command "cmd /c dir" with Process or ProcessBuilder. Maybe an encoding issue:

Der Befehl "dir?%�" ist entweder falsch geschrieben oder
konnte nicht gefunden werden.

i also tried native-image-agent which created an empty "jni-config.json "

another strage issue: the following statement retrieves a wrong (not existing) directory:
File workingDir = new File(System.getProperty("user.home"));
result: C:\Users\somebody

[mbbee]

many problems are gone with native-image-maven-plugin 1.0.0-rc16
but following still exisits:
System.getProperty("user.home")) retrieves wrong dir
and ProcessBuilder has problems with empty spaces in path ( this was a problem in jdk8 ?)

[mbbee]

file.isDirectory() is also buggy, sometimes it works sometimes not
(Files.isDirectory is allways korrect)

	public static void checkIsDirectory() {
		Path currentPath = Paths.get("").toAbsolutePath();
		System.out.println("path: " + currentPath.toString());
		File file = currentPath.toFile();
		File[] files = file.listFiles();
		for (File f : files) {
			String type = f.isDirectory() ? "D" : "F";
			String type2 = Files.isDirectory(f.toPath()) ? "D" : "F";
			if (type.equals(type2))
				System.out.println("OK------ type: " + type + " " + type2 + " file: " + f.getName());
			else
				System.err.println("ERROR--- type: " + type + " " + type2 + " file: " + f.getName());
		}
	}

[mbbee]

and ProcessBuilder doesn't find the "cmd" command
eg "cmd /c R:\putty.exe"

[peter-hofer]

Have you tried with the 19 release? We have fixed an issue how strings are passed which is likely related to this.

[mbbee]

ProcessBuilder has wrong environment.
environment is from build time not from runtime!

[peter-hofer]

Looks like you opened #1312 for this, closing this issue.