Displaying 3 results from an estimated 3 matches for "addgetelementptrcheck".
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addgetelementptrchecks
2011 Jan 23
1
[LLVMdev] Pointers in Load and Store
...quot;unGep", "Breaks Constant GEPs"
(3) The new pass derives from FunctionPass (because safecode does so,
if I had to write it, ModulePass would have been good enough.)
(4) The RunOnFunction method of the unGep pass invokes
addPoolChecks(F) passing it the function F. I will modify
addGetElementPtrChecks so that it produces array bounds in the way I
need. (I need a check that array bounds are being voilated for my
reaserch to detect overflows.)
I will then run opt as
opt -load../unGep.so
to produce llvm code without geps as operands.
Please advise if this will work or if there is an easier way...
2011 Jan 22
0
[LLVMdev] Pointers in Load and Store
...iled in several years now). The
file you want to look at is in lib/InsertPoolChecks/insert.cpp. This
file contains the InsertPoolChecks pass which, in mainline SAFECode, is
responsible for inserting array bounds checks and indirect function call
checks. In particular, you want to look at the addGetElementPtrChecks()
method.
As for Constant Expression GEPs, you want to look at the BreakConstGEP
pass, located in lib/ArrayBoundsChecks/BreakConstantGEPs.cpp.
The BreakConstantGEP pass is run first. All it does is find
instructions that use constant expression GEPs and replaces the Constant
Expression GEP...
2011 Jan 22
2
[LLVMdev] Pointers in Load and Store
John,
I have looked at the SAFECode and thought following sould work
if (isa<Constant>(I.getOperand(0)))
{ Out << "*** operand 0 is a constant ******";
if (Instruction *operandI = dyn_cast<Instruction>(I.getOperand(0)))
{ Out << "********operand is an instruction ****";
if (GetElementPtrInst *gepI =