I found problem in Mono in named mutex I have repro program:
using System;
using System.Threading;
namespace Crasher
{
internal class Program
{
public static void Main (string[] args)
{
var a = "";
for (var i = 0; i < 100; i++)
{
new Thread(Crasher).Start();
}
Console.WriteLine(a);
Console.ReadLine();
}
private static void Crasher(){
var rnd = new Random();
while (true)
{
Thread.Sleep(rnd.Next(100, 10000));
using (var mutex = new Mutex(false,
"Global\\TEST"))
{
var owner = false;
try
{
owner =
mutex.WaitOne(TimeSpan.FromMinutes(1));
}
finally
{
if (owner)
{
mutex.ReleaseMutex();
}
}
Console.WriteLine ("PING");
}
Thread.Sleep(rnd.Next(100, 10000));
}
}
}
}
It program crached mono after few seconds.
I see namedmutex_create and namedmutex_release use different locks.
First time I found it problem when run Nuget client on mono.
I verify repro on mono 4.2, 4.4, and master.
Anybody can help me resolve this issue?
On 4.4.0 native crash:
namedmutex_create: error creating mutex handle
PING
PING
PING
PING
PING
PING
PING
PING
PING
PING
PING
PING
PING
PING
_wapi_handle_unref_full: Attempting to unref unused handle 0x4e0
PING
PING
namedmutex_create: error creating mutex handle
PING
PING
PING
PING
PING
PING
_wapi_handle_ref: Attempting to ref unused handle 0x4e3
* Assertion at ../../mono/utils/mono-os-mutex.h:135, condition `res != EINVAL'
not met
Stacktrace:
at <unknown> <0xffffffff>
at (wrapper managed-to-native) System.Threading.WaitHandle.WaitOne_internal
(System.Threading.WaitHandle,intptr,int,bool) <0x00073>
at System.Threading.WaitHandle.WaitOne (System.TimeSpan,bool) <0x0009b>
at System.Threading.WaitHandle.WaitOne (System.TimeSpan) <0x0001d>
at Crasher.Program.Crasher () <0x000f0>
at System.Threading.ThreadHelper.ThreadStart_Context (object) <0x0009a>
at System.Threading.ExecutionContext.RunInternal
(System.Threading.ExecutionContext,System.Threading.ContextCallback,object,bool)
<0x001c6>
at System.Threading.ExecutionContext.Run
(System.Threading.ExecutionContext,System.Threading.ContextCallback,object,bool)
<0x00020>
at System.Threading.ExecutionContext.Run
(System.Threading.ExecutionContext,System.Threading.ContextCallback,object)
<0x00059>
at System.Threading.ThreadHelper.ThreadStart () <0x0002e>
at (wrapper runtime-invoke) object.runtime_invoke_void__this__
(object,intptr,intptr,intptr) <0x000e0>
Native stacktrace:
0 mono 0x0000000103f9b0ca
mono_handle_native_sigsegv + 271
1 libsystem_platform.dylib 0x00007fff854c252a _sigtramp +
26
2 mono 0x00000001042036a4 tmp_dir +
5316
3 libsystem_c.dylib 0x00007fff935536e7 abort + 129
4 mono 0x000000010410d1f0 monoeg_g_log
+ 0
5 mono 0x000000010410d175
monoeg_g_logv + 83
6 mono 0x000000010410d31a
monoeg_assertion_message + 143
7 mono 0x00000001040e453d
_wapi_handle_timedwait_signal_handle + 1153
8 mono 0x00000001040f4aec
wapi_WaitForSingleObjectEx + 606
9 mono 0x000000010406c01c
mono_wait_uninterrupted + 130
10 mono 0x000000010406c1ff
ves_icall_System_Threading_WaitHandle_WaitOne_internal + 73
11 ??? 0x0000000108130b54 0x0 +
4430433108
12 mscorlib.dll.dylib 0x00000001062ed7ae
System_Threading_WaitHandle_WaitOne_System_TimeSpan + 30
13 mscorlib.dll.dylib 0x0000000106140e5b
System_Threading_ThreadHelper_ThreadStart_Context_object + 155
14 mscorlib.dll.dylib 0x000000010613f331
System_Threading_ExecutionContext_Run_System_Threading_ExecutionContext_System_Threading_ContextCallback_object_bool
+ 33
15 mono 0x0000000103f04876
mono_jit_runtime_invoke + 1578
16 mono 0x0000000104090c23
mono_runtime_invoke + 130
17 mono 0x0000000104070409
start_wrapper + 424
18 mono 0x0000000104106cb1
inner_start_thread + 305
19 libsystem_pthread.dylib 0x00007fff989c399d
_pthread_body + 131
20 libsystem_pthread.dylib 0x00007fff989c391a
_pthread_body + 0
21 libsystem_pthread.dylib 0x00007fff989c1351 thread_start
+ 13
On master UnhandlerException:
namedmutex_create: error creating mutex handle
PING
PING
PING
PING
PING
_wapi_handle_unref_full: Attempting to unref unused handle 0x4eb
PING
PING
PING
_wapi_handle_unref_full: Attempting to unref unused handle 0x4ec
PING
PING
PING
PING
PING
PING
PING
PING
_wapi_handle_unref_full: Attempting to unref unused handle 0x4ee
PING
PING
PING
PING
PING
PING
PING
PING
PING
PING
PING
PING
PING
_wapi_handle_unref_full: Attempting to unref unused handle 0x4f1
PING
PING
PING
PING
PING
PING
PING
Unhandled Exception:
System.ApplicationException: Mutex is not owned
at System.Threading.Mutex.ReleaseMutex () <0x10e769ef0 + 0x00043> in
<filename unknown>:0
at (wrapper remoting-invoke-with-check) System.Threading.Mutex:ReleaseMutex ()
at Crasher.Program.Crasher () <0x10cfdfc80 + 0x00129> in <filename unknown>:0
at System.Threading.ThreadHelper.ThreadStart_Context (System.Object state)
<0x10e5fb710 + 0x00096> in <filename unknown>:0
at System.Threading.ExecutionContext.RunInternal
(System.Threading.ExecutionContext executionContext,
System.Threading.ContextCallback callback, System.Object state, System.Boolean
preserveSyncCtx) <0x10e5f93b0 + 0x001c6> in <filename unknown>:0
at System.Threading.ExecutionContext.Run (System.Threading.ExecutionContext
executionContext, System.Threading.ContextCallback callback, System.Object
state, System.Boolean preserveSyncCtx) <0x10e5f9380 + 0x00020> in <filename
unknown>:0
at System.Threading.ExecutionContext.Run (System.Threading.ExecutionContext
executionContext, System.Threading.ContextCallback callback, System.Object
state) <0x10e5f92d0 + 0x00059> in <filename unknown>:0
at System.Threading.ThreadHelper.ThreadStart () <0x10e5fb8c0 + 0x0002e> in
<filename unknown>:0
_wapi_handle_unref_full: Attempting to unref unused handle 0x4f1
[ERROR] FATAL UNHANDLED EXCEPTION: Nested exception trying to figure out what
went wrong
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