ExternalVendorCode/AFLplusplus
1
0
Fork 0
mirror of https://github.com/AFLplusplus/AFLplusplus.git synced 2025-06-10 17:21:33 +00:00
Code Issues Packages Projects Releases Wiki Activity

fix laf for potential crashes

Browse Source
This commit is contained in:
vanhauser-thc 2021-02-10 10:13:08 +01:00
parent 17cbb03ba7
commit b6643743d6
1 changed files with 14 additions and 20 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

34
instrumentation/compare-transform-pass.so.cc
View File

@ -362,19 +362,22 @@ bool CompareTransform::transformCmps(Module &M, const bool processStrcmp,
bool HasStr1 = getConstantStringInfo(Str1P, Str1);
bool HasStr2 = getConstantStringInfo(Str2P, Str2);
uint64_t constStrLen, unrollLen, constSizedLen = 0;
bool isMemcmp =
!callInst->getCalledFunction()->getName().compare(StringRef("memcmp"));
bool isSizedcmp = isMemcmp ||
!callInst->getCalledFunction()->getName().compare(
StringRef("strncmp")) ||
!callInst->getCalledFunction()->getName().compare(
StringRef("strncasecmp"));
bool isMemcmp = false;
bool isSizedcmp = false;
bool isCaseInsensitive = false;
Function * Callee = callInst->getCalledFunction();
if (Callee) {
isMemcmp = Callee->getName().compare("memcmp") == 0;
isSizedcmp = isMemcmp || Callee->getName().compare("strncmp") == 0 ||
Callee->getName().compare("strncasecmp") == 0;
isCaseInsensitive = Callee->getName().compare("strcasecmp") == 0 ||
Callee->getName().compare("strncasecmp") == 0;
}
Value *sizedValue = isSizedcmp ? callInst->getArgOperand(2) : NULL;
bool isConstSized = sizedValue && isa<ConstantInt>(sizedValue);
bool isCaseInsensitive = !callInst->getCalledFunction()->getName().compare(
StringRef("strcasecmp")) ||
!callInst->getCalledFunction()->getName().compare(
StringRef("strncasecmp"));
if (!(HasStr1 || HasStr2)) {
@ -436,15 +439,6 @@ bool CompareTransform::transformCmps(Module &M, const bool processStrcmp,
else
unrollLen = constStrLen;
/*
if (!be_quiet)
errs() << callInst->getCalledFunction()->getName() << ": unroll len "
<< unrollLen
<< ((isSizedcmp && !isConstSized) ? ", variable n" : "") << ":
"
<< ConstStr << "\n";
*/
/* split before the call instruction */
BasicBlock *bb = callInst->getParent();
BasicBlock *end_bb = bb->splitBasicBlock(BasicBlock::iterator(callInst));