[Mono-bugs] [Bug 68134][Maj] New - Mono runtime hangs

bugzilla-daemon@bugzilla.ximian.com bugzilla-daemon@bugzilla.ximian.com
Tue, 12 Oct 2004 17:39:44 -0400 (EDT)

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Changed by cmcclellen@weather.com.


--- shadow/68134	2004-10-12 17:39:44.000000000 -0400
+++ shadow/68134.tmp.25402	2004-10-12 17:39:44.000000000 -0400
@@ -0,0 +1,62 @@
+Bug#: 68134
+Product: Mono: Runtime
+Version: unspecified
+OS: other
+OS Details: FreeBSD 4.8 stable
+Status: NEW   
+Priority: Major
+Component: misc
+AssignedTo: mono-bugs@ximian.com                            
+ReportedBy: cmcclellen@weather.com               
+QAContact: mono-bugs@ximian.com
+TargetMilestone: ---
+Summary: Mono runtime hangs
+Please fill in this template when reporting a bug, unless you know what 
+you are doing.
+Description of Problem:
+mcs will hang about half the time.  We've tried all versions of mono 
+since 0.97, up to 1.0.  Bascially, mcs will say "Compilation Succeeded", 
+and never exit. We have to ctrl-c out of it, and re-run the compiler.  
+Eventually, compiles will succeed and mcs will exit.  Debugging mono with 
+gdb when it is hung during compile shows several threads waiting in 
+We are also seeing hangs doing async IO, which may be related.  Here is a 
+partial traceback of an application that gets stuck during a BeginReceive:
+#0  0x283a0a57 in _cond_wait_backout () from /usr/lib/libc_r.so.4
+#1  0x283a0969 in pthread_cond_broadcast () from /usr/lib/libc_r.so.4
+#2  0x28150e05 in ReleaseSemaphore (handle=0x13, count=1, prevcount=0x0)
+    at ../../mono/io-layer/handles-private.h:261
+#3  0x28115a27 in mono_thread_pool_add (target=0x93db370, msg=0x8c0e8c0, 
+    async_callback=0x0, state=0x0) at threadpool.c:140
+#4  0x28109812 in mono_delegate_begin_invoke (delegate=0x93db370, 
+    params=0x8efeb44) at marshal.c:1171
+Of course, they might be completely unrelated, but it seems suspicious 
+that mono gets stuck waiting on condition variables.  Again, the OS in 
+question is FreeBSD 4.8
+Steps to reproduce the problem:
+1. Try to compile something with mcs.
+Actual Results:
+Compiler hangs
+Expected Results:
+Compiler will exit
+How often does this happen? 
+About half the time we invoke mcs.
+Additional Information: