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| author | Duncan Sands <baldrick@free.fr> | 2010-10-28 15:47:26 +0000 |
|---|---|---|
| committer | Duncan Sands <baldrick@free.fr> | 2010-10-28 15:47:26 +0000 |
| commit | 89d412a14057c150172532a68ae3c8e530a6de3e (patch) | |
| tree | aba910f013250d3eaee93cc3bf2aaca7268096cf /llvm/lib/Bitcode/Reader/BitcodeReader.cpp | |
| parent | 16896c45f3c5a2a672dd3399687e1aa2a8f1dd91 (diff) | |
| download | llvm-89d412a14057c150172532a68ae3c8e530a6de3e.zip llvm-89d412a14057c150172532a68ae3c8e530a6de3e.tar.gz llvm-89d412a14057c150172532a68ae3c8e530a6de3e.tar.bz2 | |
Fix PR8494: when reading invalid bitcode, getTypeByID may return
a null pointer.
llvm-svn: 117551
Diffstat (limited to 'llvm/lib/Bitcode/Reader/BitcodeReader.cpp')
| -rw-r--r-- | llvm/lib/Bitcode/Reader/BitcodeReader.cpp | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/llvm/lib/Bitcode/Reader/BitcodeReader.cpp b/llvm/lib/Bitcode/Reader/BitcodeReader.cpp index 5f6ce5e..e8b998e 100644 --- a/llvm/lib/Bitcode/Reader/BitcodeReader.cpp +++ b/llvm/lib/Bitcode/Reader/BitcodeReader.cpp @@ -834,7 +834,8 @@ bool BitcodeReader::ParseMetadata() { unsigned Size = Record.size(); SmallVector<Value*, 8> Elts; for (unsigned i = 0; i != Size; i += 2) { - const Type *Ty = getTypeByID(Record[i], false); + const Type *Ty = getTypeByID(Record[i]); + if (!Ty) return Error("Invalid METADATA_NODE2 record"); if (Ty->isMetadataTy()) Elts.push_back(MDValueList.getValueFwdRef(Record[i+1])); else if (!Ty->isVoidTy()) @@ -1169,7 +1170,8 @@ bool BitcodeReader::ParseConstants() { } case bitc::CST_CODE_CE_SHUFVEC_EX: { // [opty, opval, opval, opval] const VectorType *RTy = dyn_cast<VectorType>(CurTy); - const VectorType *OpTy = dyn_cast<VectorType>(getTypeByID(Record[0])); + const VectorType *OpTy = + dyn_cast_or_null<VectorType>(getTypeByID(Record[0])); if (Record.size() < 4 || RTy == 0 || OpTy == 0) return Error("Invalid CE_SHUFVEC_EX record"); Constant *Op0 = ValueList.getConstantFwdRef(Record[1], OpTy); @@ -1425,6 +1427,7 @@ bool BitcodeReader::ParseModule() { if (Record.size() < 6) return Error("Invalid MODULE_CODE_GLOBALVAR record"); const Type *Ty = getTypeByID(Record[0]); + if (!Ty) return Error("Invalid MODULE_CODE_GLOBALVAR record"); if (!Ty->isPointerTy()) return Error("Global not a pointer type!"); unsigned AddressSpace = cast<PointerType>(Ty)->getAddressSpace(); @@ -1468,6 +1471,7 @@ bool BitcodeReader::ParseModule() { if (Record.size() < 8) return Error("Invalid MODULE_CODE_FUNCTION record"); const Type *Ty = getTypeByID(Record[0]); + if (!Ty) return Error("Invalid MODULE_CODE_FUNCTION record"); if (!Ty->isPointerTy()) return Error("Function not a pointer type!"); const FunctionType *FTy = @@ -1509,6 +1513,7 @@ bool BitcodeReader::ParseModule() { if (Record.size() < 3) return Error("Invalid MODULE_ALIAS record"); const Type *Ty = getTypeByID(Record[0]); + if (!Ty) return Error("Invalid MODULE_ALIAS record"); if (!Ty->isPointerTy()) return Error("Function not a pointer type!"); |