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.NET Forum / .NET Framework / CLR / July 2007converting MSIL to Native code
while performing JIT compialtion, The MSIL code will be converted to native code but how the native code will modify the assembly? is that exe/dll size will be increased while converting the MSIl code to native code? could anyone clarify this. Please ingore if i am admitted wrongly. > while performing JIT compialtion, The MSIL code will be converted to native > code but how the native code will modify the assembly? Not at all. > is that exe/dll size will be increased while converting the MSIl code to > native code? The assembly is /not/ overwritten. The methods are loaded and linked to native code and then executed /in memory/. Nothing is written back to disk, unless you use ngen, which writes out a /separate/ file containing all the native code. HTH, Phill W. > > while performing JIT compialtion, The MSIL code will be converted to native > > code but how the native code will modify the assembly? [quoted text clipped - 12 lines] > HTH, > Phill W. Phill Thank you. Is that mean JIT will perform validation and verification of MSIL.How the JIT make sure that the particular method is already executed or not ? because the the JIT compilation is performed only once for a particular method and it wont be repeated. Pls correct me if i am wrong. > Is that mean JIT will perform validation and verification of MSIL.How the > JIT make sure that the particular method is already executed or not ? It's all part and parcel of the JIT loader. Assemblies are loaded and linked method-by-method so, presumably, the framework keeps track of the ones it's loaded so far. And yes, the optimisation occurs only once; if conditions on the machine change radically while the process is running, the method may have been linked in a non-optimal way. HTH, Phill W.
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