[PATCH] D38855: Add a fuzz target for llvm's ItaniumDemangler.

[Justin Bogner via llvm-commits]

I described the problems I saw with doing that a while ago:

  http://lists.llvm.org/pipermail/llvm-commits/Week-of-Mon-20170828/483735.html

I don't think anything's changed at this point.

Kostya Serebryany <kcc at google.com> writes:
> Can we reuse main from compiler-rt/lib/fuzzer/standalone?
>
> On Thu, Oct 12, 2017, 11:23 AM Mitch Phillips via Phabricator <
> reviews at reviews.llvm.org> wrote:
>
>> hctim updated this revision to Diff 118814.
>> hctim added a comment.
>>
>> - kcc's comments
>>
>>
>> https://reviews.llvm.org/D38855
>>
>> Files:
>>   tools/llvm-demangle-fuzzer/CMakeLists.txt
>>   tools/llvm-demangle-fuzzer/llvm-demangle-fuzzer.cpp
>>
>>
>> Index: tools/llvm-demangle-fuzzer/llvm-demangle-fuzzer.cpp
>> ===================================================================
>> --- /dev/null
>> +++ tools/llvm-demangle-fuzzer/llvm-demangle-fuzzer.cpp
>> @@ -0,0 +1,24 @@
>> +//===--- llvm-demangle-fuzzer.cpp - Fuzzer for the Itanium Demangler
>> ------===//
>> +//
>> +//                     The LLVM Compiler Infrastructure
>> +//
>> +// This file is distributed under the University of Illinois Open Source
>> +// License. See LICENSE.TXT for details.
>> +//
>>
>> +//===----------------------------------------------------------------------===//
>> +
>> +#include "llvm/Demangle/Demangle.h"
>> +
>> +#include <cstdint>
>> +#include <cstdlib>
>> +#include <string>
>> +
>> +extern "C" int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
>> +  std::string NullTerminatedString((const char *)Data, Size);
>> +  int status = 0;
>> +  if (char *demangle =
>> llvm::itaniumDemangle(NullTerminatedString.c_str(), nullptr,
>> +                                         nullptr, &status))
>> +    free(demangle);
>> +
>> +  return 0;
>> +}
>> Index: tools/llvm-demangle-fuzzer/CMakeLists.txt
>> ===================================================================
>> --- /dev/null
>> +++ tools/llvm-demangle-fuzzer/CMakeLists.txt
>> @@ -0,0 +1,6 @@
>> +set(LLVM_LINK_COMPONENTS
>> +  Demangle
>> +)
>> +add_llvm_fuzzer(llvm-demangle-fuzzer
>> +  EXCLUDE_FROM_ALL
>> +  llvm-demangle-fuzzer.cpp)
>>
>>
>>