blob: 3a5b16c2cc271ac5d5a58d82d33ee00edcd008bd [file] [log] [blame]
// Copyright 2018 The Crashpad Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include <inttypes.h>
#include "base/logging.h"
#include "snapshot/elf/elf_image_reader.h"
#include "util/process/process_memory.h"
using namespace crashpad;
class FakeProcessMemory : public ProcessMemory {
public:
FakeProcessMemory(const uint8_t* data, size_t size, VMAddress fake_base)
: data_(data), size_(size), fake_base_(fake_base) {}
ssize_t ReadUpTo(VMAddress address,
size_t size,
void* buffer) const override {
VMAddress offset_in_data = address - fake_base_;
if (offset_in_data > size_)
return -1;
size_t read_size =
std::min(static_cast<size_t>(size_ - offset_in_data), size);
memcpy(buffer, &data_[offset_in_data], read_size);
return read_size;
}
private:
const uint8_t* data_;
size_t size_;
VMAddress fake_base_;
};
extern "C" int LLVMFuzzerInitialize(int* argc, char*** argv) {
// Swallow all logs to avoid spam.
logging::SetLogMessageHandler(
[](logging::LogSeverity, const char*, int, size_t, const std::string&) {
return true;
});
return 0;
}
extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
constexpr size_t kBase = 0x10000;
FakeProcessMemory process_memory(data, size, kBase);
ProcessMemoryRange process_memory_range;
process_memory_range.Initialize(&process_memory, true, kBase, size);
ElfImageReader reader;
if (!reader.Initialize(process_memory_range, kBase))
return 0;
ElfImageReader::NoteReader::Result result;
std::string note_name;
std::string note_desc;
ElfImageReader::NoteReader::NoteType note_type;
VMAddress desc_addr;
auto notes = reader.Notes(9999);
while ((result = notes->NextNote(
&note_name, &note_type, &note_desc, &desc_addr)) ==
ElfImageReader::NoteReader::Result::kSuccess) {
LOG(ERROR) << note_name << note_type << note_desc;
}
return 0;
}