Problem with Java and stdout in newest snapshot
Dr. Schroeder, Klaus
schroeder@repas-aeg.de
Wed Jan 12 02:01:00 GMT 2000
Hi ,
Using the newest snapshot cygwin1-20000108.dll in my Java JNI
application solved my problem with segmentation faults in function
ioctl.
But now I'm running into a new problem:As soon, as the jni-dll is loaded
from my Java-Program, the Java standard output (System.out.println) does
no longer work. This bug does not appear with the originalB20.1
cygwin.dll.
To demonstrate the bug I changed the Java code from the java-jni c++
example:
Main.java
========
class Main {
public static void main(String[] args) {
System.out.println("*** main START ***"); // !!!
new HelloWorld().displayHelloWorld();
System.out.println("*** main END ***"); // !!!
}
}
HelloWorld.java
============
class HelloWorld {
public native void displayHelloWorld();
static {
System.out.println("*** load hello.dll ***"); // !!!
System.loadLibrary("hello");
System.out.println("*** hello.dll loaded ***"); // !!!
}
}
Running this with the original cygwin1.dll gives the following correct
output:
*** main START ***
*** load hello.dll ***
#1 LocalFoo created.
*** hello.dll loaded ***
HelloWorld::displayHelloWorld: Entering.
#2 LocalFoo created.
#3 LocalFoo created.
#3 LocalFoo destroyed.
HelloWorld::displayHelloWorld: Leaving..
#2 LocalFoo destroyed.
*** main END ***
#1 LocalFoo destroyed.
Running the same program with cygwin1-20000108.dll:
*** main START ***
*** load hello.dll ***
#1 LocalFoo created.
HelloWorld::displayHelloWorld: Entering.
#2 LocalFoo created.
#3 LocalFoo created.
#3 LocalFoo destroyed.
HelloWorld::displayHelloWorld: Leaving..
#2 LocalFoo destroyed.
#1 LocalFoo destroyed.
The lines *** hello.dll loaded *** and *** main END *** are missing.
Any help would be greatly appreciated.
Klaus Schröder
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