Hi ,
I have some issues when instrumenting .NET assemblies. They are related
with the needed to duplicate params when replacing an existing constructor
by a new call to custom static method for custom class.
For instance let´s say that we want to update following code:
*StreamWriter sw = new StreamWriter(sourcePath)*
By
*StreamWriter sw = new MetaStreamWriter.MyStaticMethod(sourcePath, new
StreamWriter(sourcePath))*
*Note*:Signature for MyStaticMethod is
MetaStreamWriter.MyStaticMethod(string, StreamWriter)
As this point, I have no issues for importing the
*MetaStreamWriter.MyStaticMethod*, and locale target-instruction at which
to include the parameter duplication:
processor.InsertBefore(targetReferenceIntruction,
targetReferenceIntruction);
processor.InsertAfter(instruction, aspectInstruction);
The problem is the insertion of new parameter instruction which does not
respect surrounding code-blocks (autogenerated finally block when code is
inside using, else blocks, etc…).
In order to be more specific :Let´s suppose that this origin-sentence is
immediately after a using statement [*endfinally*-opCode]
*Using (FileInfo fileinfo = new FileInfo(sourcePath))*
*{*
*// code for using*
*}*
*StreamWriter sw = new StreamWriter(sourcePath)*
Or that origin-sentence is immediately after a [*ret-OpCode*] something
like
*If (null== fileInfo)*
*{*
*return;*
*}*
*StreamWriter sw = new StreamWriter(sourcePath)*
Then, when I create the new IL-sentences (*InserAfter, InserBefore*), the
new parameter instruction falls into previous existing blocks which makes
PEVerify to raise very ugly errors.
Is there any alternative way for avoiding these issues
Thanks in advance !
David
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