[compiler-rt] r323802 - [libFuzzer] Fix sizeof(ptr) bug.

[David Blaikie via llvm-commits]

Is there any easy to construct test case that was missing here? (that
enabled this bug to go undiscovered until now)

On Tue, Jan 30, 2018 at 10:27 AM Matt Morehouse via llvm-commits <
llvm-commits at lists.llvm.org> wrote:

> Author: morehouse
> Date: Tue Jan 30 10:25:55 2018
> New Revision: 323802
>
> URL: http://llvm.org/viewvc/llvm-project?rev=323802&view=rev
> Log:
> [libFuzzer] Fix sizeof(ptr) bug.
>
> sizeof(const char *) returns 4 or 8 when what we really want is the size
> of the array.
>
> Modified:
>     compiler-rt/trunk/lib/fuzzer/FuzzerMutate.cpp
>
> Modified: compiler-rt/trunk/lib/fuzzer/FuzzerMutate.cpp
> URL:
> http://llvm.org/viewvc/llvm-project/compiler-rt/trunk/lib/fuzzer/FuzzerMutate.cpp?rev=323802&r1=323801&r2=323802&view=diff
>
> ==============================================================================
> --- compiler-rt/trunk/lib/fuzzer/FuzzerMutate.cpp (original)
> +++ compiler-rt/trunk/lib/fuzzer/FuzzerMutate.cpp Tue Jan 30 10:25:55 2018
> @@ -62,7 +62,7 @@ MutationDispatcher::MutationDispatcher(R
>
>  static char RandCh(Random &Rand) {
>    if (Rand.RandBool()) return Rand(256);
> -  const char *Special = "!*'();:@&=+$,/?%#[]012Az-`~.\xff\x00";
> +  const char Special[] = "!*'();:@&=+$,/?%#[]012Az-`~.\xff\x00";
>    return Special[Rand(sizeof(Special) - 1)];
>  }
>
>
>
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