[Mono-dev] StreamReader.ReadToEnd crashes sometimes

[cs_eps]

Hallo experts!

Once in a while StreamReader.ReadToEnd() crashes with the following stack
trace:

Mprotect failed at 0x4621e000 (length 20480) with errno 12
Stacktrace:

  at (wrapper managed-to-native)
object.__icall_wrapper_mono_array_new_specific (intptr,int) <0xffffffff>
  at System.IO.StreamReader.ReadToEnd () <0x00063>
  at Skywalker.Core.Platform.CPlatformLinux.ExecSync (string,string,string&)
<0x001eb>
  at Skywalker.Core.Platform.CPlatformArchos5._ReadBattery () <0x0005f>
  at Skywalker.Core.Platform.CPlatformArchos5.get_BatteryLevel () <0x0001b>
  at Skywalker.UserInterface.Controls.CPnlEnvCUBattery.UpdateBatteryState ()
<0x00037>
  at (wrapper remoting-invoke-with-check)
Skywalker.UserInterface.Controls.CPnlEnvCUBattery.UpdateBatteryState ()
<0x00067>
  at Skywalker.UserInterface.Controls.CEnvStatusBar.OnEnvTimerTick
(object,System.EventArgs) <0x00043>
  at System.Windows.Forms.Timer.OnTick (System.EventArgs) <0x0003b>
  at System.Windows.Forms.Timer.FireTick () <0x0002f>
  at (wrapper remoting-invoke-with-check)
System.Windows.Forms.Timer.FireTick () <0x00067>
  at System.Windows.Forms.XplatUIX11.CheckTimers
(System.Collections.ArrayList,System.DateTime) <0x00313>
  at System.Windows.Forms.XplatUIX11.UpdateMessageQueue
(System.Windows.Forms.XEventQueue) <0x003c3>
  at System.Windows.Forms.XplatUIX11.GetMessage
(object,System.Windows.Forms.MSG&,intptr,int,int) <0x002cf>
  at System.Windows.Forms.XplatUI.GetMessage
(object,System.Windows.Forms.MSG&,intptr,int,int) <0x00067>
  at System.Windows.Forms.Application.RunLoop
(bool,System.Windows.Forms.ApplicationContext) <0x00c1b>
  at System.Windows.Forms.Application.Run
(System.Windows.Forms.ApplicationContext) <0x0005b>
  at System.Windows.Forms.Application.Run (System.Windows.Forms.Form)
<0x00033>
  at Skywalker.Program.Main.Program.Main () <0x0007f>
  at (wrapper runtime-invoke) object.runtime_invoke_void
(object,intptr,intptr,intptr) <0x0009f>

Native stacktrace:

    mono [0xeecb8]
    mono [0x134fb4]
    /lib/libc.so.6(__default_rt_sa_restorer_v2+0) [0x4010bb20]
    mono [0x2c391c]
    mono [0x2c3370]
    mono [0x2c978c]
    mono [0x2c9d18]
    mono [0x2c9fdc]
    mono [0x258be0]
    mono(mono_array_new_specific+0x98) [0x258d38]
    [0x4084e470]
    mono(mono_array_new_specific+0xc) [0x258cac]
    mono(mono_array_new_specific+0xc) [0x258cac]
    mono(mono_array_new_specific+0xc) [0x258cac]
    mono(mono_array_new_specific+0xc) [0x258cac]

...
...
...
warning: Unable to find libthread_db matching inferior's thread library,
thread debugging will not be available.
warning: Unable to find libthread_db matching inferior's thread library,
thread debugging will not be available.
warning: Unable to find libthread_db matching inferior's thread library,
thread debugging will not be available.
Cannot access memory at address 0x44ef
0x400be3b4 in read () from /lib/libpthread.so.0
* 1 process 26404  0x400be3b4 in read () from /lib/libpthread.so.0

Thread 1 (process 26404):
#0  0x400be3b4 in read () from /lib/libpthread.so.0
#1  0x400bdd94 in ?? () from /lib/libpthread.so.0
#2  0xbede9fcc in ?? ()
Backtrace stopped: previous frame identical to this frame (corrupt stack?)

=================================================================
Got a SIGABRT while executing native code. This usually indicates
a fatal error in the mono runtime or one of the native libraries 
used by your application.
=================================================================


Here the code snippet that causes the exception. Unfortunately we can not
catch it, so the application terminates.
using (Process p = new Process())
            {
                // Redirect the output stream of the child process.
                p.StartInfo.UseShellExecute = false; //true for open
documents with the associated application
                p.StartInfo.RedirectStandardOutput = true;
                p.StartInfo.FileName = p_Process;
                p.StartInfo.Arguments = p_Arguments;

                try
                {
                    if (p.Start() && p.Id > 0)
                    {
                        pid = p.Id;

                        _Logger.Debug(string.Format("process {0} {1} started
with pid={2}", p_Process, p_Arguments, pid));

                        // Do not wait for the child process to exit before
                        // reading to the end of its redirected stream.
                        p_Output = p.StandardOutput.ReadToEnd();

                        //wait for completion
                        p.WaitForExit();
                        // fetch the exit code
                        exitCode = p.ExitCode;

                        _Logger.Debug(string.Format("process with pid={0}
exited with code {1}", pid, exitCode));
                    }
                    else
                    {
                        _Logger.Warn(string.Format("process {0} {1} did not
start", p_Process, p_Arguments));
                        CompactMemory();
                    }
                }
                catch (Exception ex)
                {
                    _Logger.Warn(string.Format("exception in process {0}:
{1} ", p_Process, ex.Message));
                }
            }

Is there a fix for this? or a workaround?

Every help is appreciated!
-- 
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