6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-01-05 12:31:33 +00:00
Code Issues Projects Releases Wiki Activity

DataFlowSanitizer: fix a use-after-free. Spotted by libgmalloc.

Browse Source 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188216 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Peter Collingbourne 2013-08-12 22:38:39 +00:00
parent f15dfe4eb4
commit a90d91fd1a
1 changed files with 4 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
lib/Transforms/Instrumentation/DataFlowSanitizer.cpp
View File

@ -422,9 +422,12 @@ bool DataFlowSanitizer::runOnModule(Module &M) {
// instruction's next pointer and moving the next instruction to the
// tail block from which we should continue.
Instruction *Next = Inst->getNextNode();
// DFSanVisitor may delete Inst, so keep track of whether it was a
// terminator.
bool IsTerminator = isa<TerminatorInst>(Inst);
if (!DFSF.SkipInsts.count(Inst))
DFSanVisitor(DFSF).visit(Inst);
if (isa<TerminatorInst>(Inst))
if (IsTerminator)
break;
Inst = Next;
}