The following program crashes:
import java.io.*;
import java.net.*;
public class TestS {
public static void main(String args[]) {
new Thread() {
public void run() {
testConnect();
}
}.start();
}
private static void testConnect() {
try {
System.out.println("Try connect");
Socket s = new Socket("127.0.0.1",2000); //crashes here with an invalid
monitor exception: thread not owner (lock.c notifyAll)
System.out.println("connected!");
} catch (Exception e) {
e.printStackTrace();
}
System.out.println("exiting");
System.exit(0);
}
}
This crash is caused by a bug in the COMPARE_AND_SWAP macro in src/arch/avr32.h
===================================================================
--- buildroot/package/java/jamvm/jamvm-1.5.0.patch.avr32 (revision 23881)
+++ buildroot/package/java/jamvm/jamvm-1.5.0.patch.avr32 (working copy)
@@ -53,7 +53,7 @@
diff -urpN jamvm-1.5.0/src/arch/avr32.h jamvm-1.5.0-avr32/src/arch/avr32.h
--- jamvm-1.5.0/src/arch/avr32.h 1970-01-01 01:00:00.000000000 +0100
+++ jamvm-1.5.0-avr32/src/arch/avr32.h 2008-02-08 09:20:41.000000000 +0100
-@@ -0,0 +1,109 @@
+@@ -0,0 +1,110 @@
+/*
+ * Copyright (C) 2003, 2004, 2005, 2006, 2007
+ * Robert Lougher <rob@lougher.org.uk>.
@@ -128,17 +128,18 @@
+// printf("compare and swap %d %d %s:line %d\n",old_val,new_val,__FILE__,__LINE__);
+#define COMPARE_AND_SWAP(addr, old_val, new_val) \
+({ \
-+ int result; \
++ int tmp, result=0; \
+ __asm__ __volatile__ (" \
+ 1: ssrf 5; \
-+ ld.w %[ret], %[m]; \
-+ cp.w %[ret], %[old]; \
++ ld.w %[tmp], %[m]; \
++ cp.w %[tmp], %[old]; \
+ brne 2f; \
+ stcond %[m], %[new]; \
+ brne 1b; \
++ mov %[ret], 1; \
+ 2:" \
-+ : [ret] "=&r" (result), [m] "=m" (*addr) \
-+ : "m" (*addr), [old] "r" (old_val), [new] "r" (new_val) \
++ : [tmp] "=&r" (tmp), [ret] "=&r" (result), [m] "=m" (*addr) \
++ : "m" (*addr), [old] "ir" (old_val), [new] "r" (new_val) \
+ : "memory", "cc"); \
+ result; \
+})
patch [^] (1,556 bytes) 10-31-08 08:23 
