In code I have to port from MS .NET to mono I observed several SIGILL
crashes at points in code, where calls to external code are made
within a try block followed by a finally but *without* a catch
statement.
try {
unrar.dosomething();
throw new Exception("test");
}
// no catch here
finally
{
unrar.close(); // calls unmanaged code
}
The unmanaged code called in unrar.dosomething() is C++ code compiled
with exceptions enabled but it does not throw the exception, but the
managed code that follows. The call to unrar.close() (which does not
throw any exception) in the finally clause crashes with:
System.ExecutionEngineException: SIGILL
at (wrapper managed-to-native)
NntpApp.nntp.rar.Unrar:RARCloseArchive (intptr)
at NntpApp.nntp.rar.Unrar.Close () [0x00000]
at usenextapp.FilegroupPreview.ExtractFileFromRar (System.String
path) [0x00000]
The SIGILL does not appear if I catch the exception and rethrow it in
the finally clause
Exception e=null;
try {
unmanaged1();
throw new Exception("test");
}
catch(Exception ex)
{
e= ex;
}
finally
{
cleanup();
if (e!=null)
throw e;
}
Any thoughts on that?
Christian Stümpel
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