| //===- SymbolStripping.cpp - Code to string symbols for methods and modules -=// |
| // |
| // This file implements stripping symbols out of symbol tables. |
| // |
| // Specifically, this allows you to strip all of the symbols out of: |
| // * A method |
| // * All methods in a module |
| // * All symbols in a module (all method 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/Module.h" |
| #include "llvm/Method.h" |
| #include "llvm/SymbolTable.h" |
| #include "llvm/Opt/AllOpts.h" |
| |
| static bool StripSymbolTable(SymbolTable *SymTab) { |
| if (SymTab == 0) return false; // No symbol table? No problem. |
| bool RemovedSymbol = false; |
| |
| for (SymbolTable::iterator I = SymTab->begin(); I != SymTab->end(); I++) { |
| map<const string, Value *> &Plane = I->second; |
| |
| map<const string, Value *>::iterator B; |
| while ((B = Plane.begin()) != Plane.end()) { // Found nonempty type plane! |
| B->second->setName(""); // Set name to "", removing from symbol table! |
| RemovedSymbol = true; |
| assert(Plane.begin() != B); |
| } |
| } |
| |
| return RemovedSymbol; |
| } |
| |
| |
| // DoSymbolStripping - Remove all symbolic information from a method |
| // |
| bool DoSymbolStripping(Method *M) { |
| return StripSymbolTable(M->getSymbolTable()); |
| } |
| |
| // DoFullSymbolStripping - Remove all symbolic information from all methods |
| // in a module, and all module level symbols. (method names, etc...) |
| // |
| bool DoFullSymbolStripping(Module *M) { |
| // Remove all symbols from methods in this module... and then strip all of the |
| // symbols in this module... |
| // |
| return DoSymbolStripping(M) | StripSymbolTable(M->getSymbolTable()); |
| } |