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//===- SymbolStripping.cpp - Strip symbols for functions and modules ------===//
//
// The LLVM Compiler Infrastructure
//
// This file was developed by the LLVM research group and is distributed under
// the University of Illinois Open Source License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file implements stripping symbols out of symbol tables.
//
// Specifically, this allows you to strip all of the symbols out of:
// * All functions in a module
// * All non-essential symbols in a module (all function symbols + all module
// scope symbols)
//
// Notice that:
// * This pass makes code much less readable, so it should only be used in
// situations where the 'strip' utility would be used (such as reducing
// code size, and making it harder to reverse engineer code).
//
//===----------------------------------------------------------------------===//
#include "llvm/Transforms/Scalar.h"
#include "llvm/Module.h"
#include "llvm/SymbolTable.h"
#include "llvm/Pass.h"
using namespace llvm;
namespace {
struct SymbolStripping : public FunctionPass {
virtual bool runOnFunction(Function &F) {
return F.getSymbolTable().strip();
}
virtual void getAnalysisUsage(AnalysisUsage &AU) const {
AU.setPreservesAll();
}
};
RegisterOpt<SymbolStripping> X("strip", "Strip symbols from functions");
struct FullSymbolStripping : public SymbolStripping {
virtual bool doInitialization(Module &M) {
return M.getSymbolTable().strip();
}
};
RegisterOpt<FullSymbolStripping> Y("mstrip",
"Strip symbols from module and functions");
}
Pass *llvm::createSymbolStrippingPass() {
return new SymbolStripping();
}
Pass *llvm::createFullSymbolStrippingPass() {
return new FullSymbolStripping();
}
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