1 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
2 // -*- mode: C++ -*-
3 //
4 // Copyright 2021-2022 Google LLC
5 //
6 // Licensed under the Apache License v2.0 with LLVM Exceptions (the
7 // "License"); you may not use this file except in compliance with the
8 // License. You may obtain a copy of the License at
9 //
10 // https://llvm.org/LICENSE.txt
11 //
12 // Unless required by applicable law or agreed to in writing, software
13 // distributed under the License is distributed on an "AS IS" BASIS,
14 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 // See the License for the specific language governing permissions and
16 // limitations under the License.
17 //
18 // Author: Matthias Maennich
19
20 #include <string>
21
22 #include <libxml/parser.h>
23 #include <libxml/tree.h>
24 #include "abigail_reader.h"
25 #include "error.h"
26 #include "graph.h"
27
DoNothing(void *,const char *,...)28 static void DoNothing(void*, const char*, ...) {}
29
LLVMFuzzerTestOneInput(char * data,size_t size)30 extern "C" int LLVMFuzzerTestOneInput(char* data, size_t size) {
31 xmlParserCtxtPtr ctxt = xmlNewParserCtxt();
32 // Suppress libxml error messages.
33 xmlSetGenericErrorFunc(ctxt, (xmlGenericErrorFunc) DoNothing);
34 xmlDocPtr doc = xmlCtxtReadMemory(
35 ctxt, data, size, nullptr, nullptr,
36 XML_PARSE_NOERROR | XML_PARSE_NONET | XML_PARSE_NOWARNING);
37 xmlFreeParserCtxt(ctxt);
38
39 // Bail out if the doc XML is invalid.
40 if (!doc) {
41 return 0;
42 }
43
44 xmlNodePtr root = xmlDocGetRootElement(doc);
45 if (root) {
46 try {
47 stg::Graph graph;
48 stg::abixml::Abigail(graph).ProcessRoot(root);
49 } catch (const stg::Exception&) {
50 // Pass as this is us catching invalid XML properly.
51 }
52 }
53
54 xmlFreeDoc(doc);
55
56 return 0;
57 }
58