Name: chT40241 Date: 10/02/97


The Problem

Start the following java_g command line in a console window. Then type ctrl-break:


D:\javabugs>java_g -debug sun.tools.debug.EmptyApp
Warning: JIT compiler "symcjit" not found. Will use interpreter.
Agent password=32faai

Full thread dump:

*** panic: Internal error dumping threads!

abnormal program termination




Our Analysis

The VM is immediately terminated, due to an assertion failure on line 493 on threads_md.c.

Comments in threadDumpInfo in debug.c indicate that under Windows, it is impossible to lock the thread queue during a ctrl-break, which means that threads_md.c ought not to abort if the queue is not locked.

This is a serious impediment to debugging when using the java_g version of Java.

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