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Bug 8786 - MissingMethodException when using MemoryMappedFile.CreateFromFile in simulator
: MissingMethodException when using MemoryMappedFile.CreateFromFile in simulator
Status: RESOLVED FIXED
Product: iOS
Classification: Xamarin
Component: Class Libraries
: 6.1.x
: PC Mac OS
: --- normal
: Untriaged
Assigned To: Bugzilla
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Reported: 2012-12-05 18:17 EST by Frank A. Krueger
Modified: 2012-12-06 12:30 EST (History)
3 users (show)

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Description Frank A. Krueger 2012-12-05 18:17:38 EST
When I try to use MemoryMappedFile.CreateFromFile, I get the following
exception when running in the simulator:

[ERROR] FATAL UNHANDLED EXCEPTION: System.MissingMethodException: Cannot find
the requested method.
  at (wrapper managed-to-native)
System.IO.MemoryMappedFiles.MemoryMapImpl:mono_filesize_from_path (string)
  at System.IO.MemoryMappedFiles.MemoryMapImpl.Open (System.String path,
FileMode mode, Int64 capacity, MemoryMappedFileAccess access) [0x00000] in
/Developer/MonoTouch/Source/mono/mcs/class/System.Core/System.IO.MemoryMappedFiles/MemoryMappedFile.cs:358 
  at System.IO.MemoryMappedFiles.MemoryMappedFile.CreateFromFile (System.String
path, FileMode mode, System.String mapName, Int64 capacity,
MemoryMappedFileAccess access) [0x00055] in
/Developer/MonoTouch/Source/mono/mcs/class/System.Core/System.IO.MemoryMappedFiles/MemoryMappedFile.cs:475 

The repo is simply:

using (var mm = MemoryMappedFile.CreateFromFile ("file", FileMode.Open, null,
0L, MemoryMappedFileAccess.Read)) {
}

Versions:
  mtouch 6.0.4.1349114218
  Mono JIT compiler version 2.10.11 (mono-2-10/6cee717 Thu Nov 29 17:32:29 EST
2012)
Comment 1 Sebastien Pouliot 2012-12-06 08:49:51 EST
Rodrigo added MemoryMappedFile support last year (managed code) but some
functions (inclduing the one above) are not part of mono (at least not the one
used when JITing / simulator).

#if (defined (__MACH__) && defined (TARGET_ARM)) || defined (TARGET_ANDROID)
Comment 2 Rodrigo Kumpera 2012-12-06 12:30:07 EST
Fixed on MM and bumped monotouch head. Please bump 6.0-series if this bug needs
to be fixed there as well.

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