FTR, here's a test case I just minimized. It may be related to some
of the failures we've been seeing.
-- John
/*
Minimized test case for stack walking bug.
JVM crash occurs when compiled code calls DMH to compiled code.
To reproduce:
$JAVA7X_HOME/bin/javac -XDinvokedynamic $BUGDIR/ThrowBug.java
$JAVA7X_HOME/bin/java -Xbatch -XX:+PrintCompilation -XX:
+EnableMethodHandles -cp $BUGDIR ThrowBug
continues to reproduce with -
XX:CompileCommand=compileonly,ThrowBug.* (2 methods compiled only)
*/
import java.dyn.*;
import static java.dyn.MethodHandles.*;
class ThrowBug {
public static void main(String... av) throws Throwable {
for (int i = 0; i < 10001; i++) {
catcher(THROWER);
}
System.out.println("catches="+catches);
}
static final Exception blintz = new ClassCastException("blintz");
static Object thrower() throws Throwable {
throw blintz; // food fight!!
}
static final MethodHandle THROWER
= lookup().findStatic(ThrowBug.class, "thrower",
methodType(Object.class));
static Object catcher(MethodHandle thrower) {
try {
return THROWER.invoke();
} catch (Throwable ex) {
catches++;
return null;
}
}
static int catches;
}
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