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// Copyright 2015 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <cassert>
#include <cstddef>
#include <cstdint>
#include <functional>
#include <limits>
#include <string>
#include "libxml/parser.h"
#include "libxml/xmlsave.h"
void ignore (void* ctx, const char* msg, ...) {
// Error handler to avoid spam of error messages from libxml parser.
}
extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
xmlSetGenericErrorFunc(NULL, &ignore);
// Test default empty options value and one random combination of flags.
const std::string data_string(reinterpret_cast<const char*>(data), size);
const std::size_t data_hash = std::hash<std::string>()(data_string);
const int max_option_value = std::numeric_limits<int>::max();
// Disable XML_PARSE_HUGE to avoid stack overflow. http://crbug.com/738947.
// Disable XML_PARSE_NOENT, XML_PARSE_DTD[LOAD|ATTR|VALID] to avoid timeout
// loading external entity from stdin. http://crbug.com/755142.
const int random_option = data_hash & max_option_value & ~XML_PARSE_NOENT &
~XML_PARSE_DTDLOAD & ~XML_PARSE_DTDATTR &
~XML_PARSE_DTDVALID & ~XML_PARSE_HUGE;
const int options[] = {0, random_option};
for (const auto option_value : options) {
// Intentionally pass raw data as the API does not require trailing \0.
if (auto doc = xmlReadMemory(reinterpret_cast<const char*>(data), size,
"noname.xml", NULL, option_value)) {
auto buffer = xmlBufferCreate();
assert(buffer);
auto context = xmlSaveToBuffer(buffer, NULL, 0);
xmlSaveDoc(context, doc);
xmlSaveClose(context);
xmlFreeDoc(doc);
xmlBufferFree(buffer);
}
}
return 0;
}
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