[LLVMdev] Adding integer field to all C++ classes in LLVM (original) (raw)

Mohit Mishra mmishra23 at gmail.com
Thu Jul 16 14:37:03 PDT 2015

HI Mats,

Thanks for getting back to me.

I take it you mean that you want to add a field to all classes COMPILED by

LLVM, and not all classes that LLVM consists of? YES!

Also, unless I'm terribly misinformed, adding something to an ArrayRef is not going to work. ArrayRef, StringRef and such are "references to the original data in the calling code", which means you have no right to modify it.

What I want is to be able to randomize object layout; and hence adding of integer fields to the classes might be a good option. While I did think so about ArrayRef, I thought about to substitute that with vector something like this: vector<Type*> vecType = Elements.vec (); vecType.insert (Type::getInt32Ty (Context)) ST->setBody(vecType, isPacked);

and modify the setBody function parameters replacing ArrayRef with the vector. However, I'm still skeptical about this.

What do you propose to have a fairly good object layout randomization?

Best, Mohit. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20150717/0ca5b930/attachment.html>

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