diff options
| author | Vedant Kumar <vsk@apple.com> | 2017-07-29 00:19:51 +0000 |
|---|---|---|
| committer | Vedant Kumar <vsk@apple.com> | 2017-07-29 00:19:51 +0000 |
| commit | 081dca929f7dc72b99e53622bff71d21c9519ffb (patch) | |
| tree | 5a28a96f2b28d6041a91b17ffeacf9255be72d07 /include/clang/Basic/Sanitizers.def | |
| parent | 8c94133f92df7c2e36e8ac0fa31011f2e54b5f3e (diff) | |
[ubsan] Diagnose invalid uses of builtins (clang)
On some targets, passing zero to the clz() or ctz() builtins has undefined
behavior. I ran into this issue while debugging UB in __hash_table from libcxx:
the bug I was seeing manifested itself differently under -O0 vs -Os, due to a
UB call to clz() (see: libcxx/r304617).
This patch introduces a check which can detect UB calls to builtins.
llvm.org/PR26979
Differential Revision: https://reviews.llvm.org/D34590
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@309459 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'include/clang/Basic/Sanitizers.def')
| -rw-r--r-- | include/clang/Basic/Sanitizers.def | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/include/clang/Basic/Sanitizers.def b/include/clang/Basic/Sanitizers.def index 71b11974db..28a92abf00 100644 --- a/include/clang/Basic/Sanitizers.def +++ b/include/clang/Basic/Sanitizers.def @@ -60,6 +60,7 @@ SANITIZER("leak", Leak) SANITIZER("alignment", Alignment) SANITIZER("array-bounds", ArrayBounds) SANITIZER("bool", Bool) +SANITIZER("builtin", Builtin) SANITIZER("enum", Enum) SANITIZER("float-cast-overflow", FloatCastOverflow) SANITIZER("float-divide-by-zero", FloatDivideByZero) @@ -107,11 +108,12 @@ SANITIZER("safe-stack", SafeStack) // -fsanitize=undefined includes all the sanitizers which have low overhead, no // ABI or address space layout implications, and only catch undefined behavior. SANITIZER_GROUP("undefined", Undefined, - Alignment | Bool | ArrayBounds | Enum | FloatCastOverflow | - FloatDivideByZero | IntegerDivideByZero | NonnullAttribute | - Null | ObjectSize | PointerOverflow | Return | - ReturnsNonnullAttribute | Shift | SignedIntegerOverflow | - Unreachable | VLABound | Function | Vptr) + Alignment | Bool | Builtin | ArrayBounds | Enum | + FloatCastOverflow | FloatDivideByZero | + IntegerDivideByZero | NonnullAttribute | Null | ObjectSize | + PointerOverflow | Return | ReturnsNonnullAttribute | Shift | + SignedIntegerOverflow | Unreachable | VLABound | Function | + Vptr) // -fsanitize=undefined-trap is an alias for -fsanitize=undefined. SANITIZER_GROUP("undefined-trap", UndefinedTrap, Undefined) |