diff options
| -rw-r--r-- | lib/Core/Memory.cpp | 5 | ||||
| -rw-r--r-- | test/regression/2015-06-22-struct-write.c | 21 |
2 files changed, 25 insertions, 1 deletions
diff --git a/lib/Core/Memory.cpp b/lib/Core/Memory.cpp index 50e9aa9f..47bc7576 100644 --- a/lib/Core/Memory.cpp +++ b/lib/Core/Memory.cpp @@ -529,7 +529,10 @@ void ObjectState::write(unsigned offset, ref<Expr> value) { // Check for writes of constant values. if (ConstantExpr *CE = dyn_cast<ConstantExpr>(value)) { Expr::Width w = CE->getWidth(); - if (w <= 64) { + //assuming width can't be 0 so I can miss half of power of two check + assert(w > 0); + //also checks that w is a power of two + if (w <= 64 && !(w & (w - 1))) { uint64_t val = CE->getZExtValue(); switch (w) { default: assert(0 && "Invalid write size!"); diff --git a/test/regression/2015-06-22-struct-write.c b/test/regression/2015-06-22-struct-write.c new file mode 100644 index 00000000..6efc4ee6 --- /dev/null +++ b/test/regression/2015-06-22-struct-write.c @@ -0,0 +1,21 @@ +// RUN: %llvmgcc %s -emit-llvm -g -O0 -c -o %t.bc +// RUN: rm -rf %t.klee-out +// RUN: %klee --output-dir=%t.klee-out -exit-on-error %t.bc + +#include <assert.h> +#include <klee/klee.h> + +union U0 { + signed f3 :18; +}; + +static union U0 u = { 0UL }; + +int main(int argc, char **argv) { + u.f3 = 534; + + klee_assert(u.f3 == 534); + + return 0; +} + |