[Mono-list] Crash - Array allocation

[rick_l]

Hello,

My C# program is crashing on Linux. I get the following stack trace:

  at (wrapper managed-to-native) object.__icall_wrapper_mono_array_new_2
(intptr,intptr,intptr) <0x00004>
  at (wrapper managed-to-native) object.__icall_wrapper_mono_array_new_2
(intptr,intptr,intptr) <0xffffffff>
  at MC7000API.DaqDevice.ReadScanData (int) [0x00032] in
/root/Linux/MC7000Software/Library/MC7000API/api/api.cs:91
  at AInScanContinuous.AInScanContinuousForm.StartButton_Click
(object,System.EventArgs) [0x000ca] in
/root/Linux/AInScanContinuous/AInScanContinuousForm.cs:74
  at System.Windows.Forms.Control.OnClick (System.EventArgs) [0x0001c] in
/usr/src/packages/BUILD/mono-2.4.2/mcs/class/Managed.Windows.Forms/System.Windows.Forms/Control.cs:6033
  at System.Windows.Forms.Button.OnClick (System.EventArgs) [0x00024] in
/usr/src/packages/BUILD/mono-2.4.2/mcs/class/Managed.Windows.Forms/System.Windows.Forms/Button.cs:106
  at System.Windows.Forms.ButtonBase.OnMouseUp
(System.Windows.Forms.MouseEventArgs) [0x00081] in
/usr/src/packages/BUILD/mono-2.4.2/mcs/class/Managed.Windows.Forms/System.Windows.Forms/ButtonBase.cs:634
  at System.Windows.Forms.Button.OnMouseUp
(System.Windows.Forms.MouseEventArgs) [0x00000] in
/usr/src/packages/BUILD/mono-2.4.2/mcs/class/Managed.Windows.Forms/System.Windows.Forms/Button.cs:128
  at System.Windows.Forms.Control.WmLButtonUp
(System.Windows.Forms.Message&) [0x00081] in
/usr/src/packages/BUILD/mono-2.4.2/mcs/class/Managed.Windows.Forms/System.Windows.Forms/Control.cs:5595
  at System.Windows.Forms.Control.WndProc (System.Windows.Forms.Message&)
[0x0017c] in
/usr/src/packages/BUILD/mono-2.4.2/mcs/class/Managed.Windows.Forms/System.Windows.Forms/Control.cs:5332
  at System.Windows.Forms.ButtonBase.WndProc (System.Windows.Forms.Message&)
[0x00055] in
/usr/src/packages/BUILD/mono-2.4.2/mcs/class/Managed.Windows.Forms/System.Windows.Forms/ButtonBase.cs:692
  at System.Windows.Forms.Button.WndProc (System.Windows.Forms.Message&)
[0x00000] in
/usr/src/packages/BUILD/mono-2.4.2/mcs/class/Managed.Windows.Forms/System.Windows.Forms/Button.cs:150
  at System.Windows.Forms.Control/ControlWindowTarget.OnMessage
(System.Windows.Forms.Message&) [0x00000] in
/usr/src/packages/BUILD/mono-2.4.2/mcs/class/Managed.Windows.Forms/System.Windows.Forms/Control.cs:234
  at System.Windows.Forms.Control/ControlNativeWindow.WndProc
(System.Windows.Forms.Message&) [0x00000] in
/usr/src/packages/BUILD/mono-2.4.2/mcs/class/Managed.Windows.Forms/System.Windows.Forms/Control.cs:215
  at System.Windows.Forms.NativeWindow.WndProc
(intptr,System.Windows.Forms.Msg,intptr,intptr) [0x00085] in
/usr/src/packages/BUILD/mono-2.4.2/mcs/class/Managed.Windows.Forms/System.Windows.Forms/NativeWindow.cs:242
  at System.Windows.Forms.XplatUIX11.DispatchMessage
(System.Windows.Forms.MSG&) [0x00000] in
/usr/src/packages/BUILD/mono-2.4.2/mcs/class/Managed.Windows.Forms/System.Windows.Forms/XplatUIX11.cs:3424
  at System.Windows.Forms.XplatUI.DispatchMessage
(System.Windows.Forms.MSG&) [0x00000] in
/usr/src/packages/BUILD/mono-2.4.2/mcs/class/Managed.Windows.Forms/System.Windows.Forms/XplatUI.cs:605
  at System.Windows.Forms.Application.RunLoop
(bool,System.Windows.Forms.ApplicationContext) [0x0036a] in
/usr/src/packages/BUILD/mono-2.4.2/mcs/class/Managed.Windows.Forms/System.Windows.Forms/Application.cs:982
  at System.Windows.Forms.Application.Run
(System.Windows.Forms.ApplicationContext) [0x00014] in
/usr/src/packages/BUILD/mono-2.4.2/mcs/class/Managed.Windows.Forms/System.Windows.Forms/Application.cs:761
  at System.Windows.Forms.Application.Run (System.Windows.Forms.Form)
[0x00000] in
/usr/src/packages/BUILD/mono-2.4.2/mcs/class/Managed.Windows.Forms/System.Windows.Forms/Application.cs:740
  at AInScanContinuous.Program.Main () [0x0000b] in
/root/Linux/AInScanContinuous/Program.cs:17
  at (wrapper runtime-invoke) object.runtime_invoke_void
(object,intptr,intptr,intptr) <0xffffffff>

Native stacktrace:

      /usr/bin/mono [0x80cbfe4]
      /usr/bin/mono [0x80f66bb]
      [0xffffe410]
      /usr/bin/mono [0x81d9023]
      /usr/bin/mono [0x81e5447]
      /usr/bin/mono [0x81e0074]
      /usr/bin/mono [0x81df942]
      /usr/bin/mono [0x81d98dd]
      /usr/bin/mono [0x81d9ccf]
      /usr/bin/mono [0x81da009]
      /usr/bin/mono [0x81dcf7a]
      /usr/bin/mono [0x81dd231]
      /usr/bin/mono [0x81dd463]
      /usr/bin/mono(mono_array_new_full+0x182) [0x81143c2]
      /usr/bin/mono [0x80a6ebd]
      [0xb56a6753]
      [0xb56a6440]
      [0xb565d8dd]
      [0xb565d6f0]
      [0xb565d66d]
      [0xb565d352]
      [0xb565d1e6]
      [0xb565d07a]
      [0xb5a82df4]
      [0xb5a005b0]
      [0xb5a00506]
      [0xb5a82bbf]
      [0xb5a82b97]
      [0xb5a81ce5]
      [0xb56aee3c]
      [0xb569d268]
      [0xb5a1b8e8]
      [0xb5a1accf]
      [0xb5a1a8e4]
      [0xb78e431f]
      [0xb78e4252]
      /usr/bin/mono(mono_runtime_exec_main+0xe5) [0x8113825]
      /usr/bin/mono(mono_runtime_run_main+0x16b) [0x8113fcb]
      /usr/bin/mono(mono_debugger_main+0x77) [0x80f9c47]
      /usr/bin/mono(mono_main+0x15bc) [0x80b354c]
      /usr/bin/mono [0x805af21]
      /lib/libc.so.6(__libc_start_main+0xe5) [0xb7e43705]
      /usr/bin/mono [0x805ae51]

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

My program allocates and copies many arrays. The code at line 91 in api.cs
is allocating an array inside a method...

double[,] scanData = new double[channelCount, samplesRequested] //
channelCount = 8, samples requested = 316

This array is passed back to my application. I get the crash when this
method gets called 100 to 130 times.
I don’t get an Exception that I can catch. How can I debug this?

Thanks

Rick L

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