mirror of
https://github.com/llvm/llvm-project.git
synced 2025-04-29 23:16:06 +00:00
1287f5aaf7
The fuzzer relies on MemoryBuffer to hold fuzz data, and MemoryBuffer guarantees that "In addition to basic access to the characters in the file, this interface guarantees you can read one character past the end of the file, and that this character will read as '\0'." [Ref](https://llvm.org/doxygen/classllvm_1_1MemoryBuffer.html#details). The current fuzzing set up does not support this, which causes potential false positives. This PR fixes it. Fixes: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=65114 Signed-off-by: David Korczynski <david@adalogics.com>
41 lines
1.4 KiB
C++
41 lines
1.4 KiB
C++
//===-- llvm-dwarfdump-fuzzer.cpp - Fuzz the llvm-dwarfdump tool ----------===//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
///
|
|
/// \file
|
|
/// This file implements a function that runs llvm-dwarfdump
|
|
/// on a single input. This function is then linked into the Fuzzer library.
|
|
///
|
|
//===----------------------------------------------------------------------===//
|
|
#include "llvm/DebugInfo/DIContext.h"
|
|
#include "llvm/DebugInfo/DWARF/DWARFContext.h"
|
|
#include "llvm/Object/ObjectFile.h"
|
|
#include "llvm/Support/MemoryBuffer.h"
|
|
|
|
using namespace llvm;
|
|
using namespace object;
|
|
|
|
extern "C" int LLVMFuzzerTestOneInput(uint8_t *data, size_t size) {
|
|
std::string Payload(reinterpret_cast<const char *>(data), size);
|
|
std::unique_ptr<MemoryBuffer> Buff = MemoryBuffer::getMemBuffer(Payload);
|
|
|
|
Expected<std::unique_ptr<ObjectFile>> ObjOrErr =
|
|
ObjectFile::createObjectFile(Buff->getMemBufferRef());
|
|
if (auto E = ObjOrErr.takeError()) {
|
|
consumeError(std::move(E));
|
|
return 0;
|
|
}
|
|
ObjectFile &Obj = *ObjOrErr.get();
|
|
std::unique_ptr<DIContext> DICtx = DWARFContext::create(Obj);
|
|
|
|
|
|
DIDumpOptions opts;
|
|
opts.DumpType = DIDT_All;
|
|
DICtx->dump(nulls(), opts);
|
|
return 0;
|
|
}
|