blob: af5f18f305b23e838f257c86e2a91082b42afecb (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
|
//===- 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());
}
|
