1 /*
2 * Copyright (C) 2018 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include <stddef.h>
18 #include <stdint.h>
19
20 #include "perfetto/ext/base/file_utils.h"
21 #include "perfetto/ext/base/utils.h"
22 #include "perfetto/ext/tracing/core/basic_types.h"
23 #include "src/profiling/common/unwind_support.h"
24 #include "src/profiling/memory/shared_ring_buffer.h"
25 #include "src/profiling/memory/unwinding.h"
26 #include "src/profiling/memory/unwound_messages.h"
27
28 namespace perfetto {
29 namespace profiling {
30 namespace {
31
32 class NopDelegate : public UnwindingWorker::Delegate {
PostAllocRecord(UnwindingWorker *,std::unique_ptr<AllocRecord>)33 void PostAllocRecord(UnwindingWorker*,
34 std::unique_ptr<AllocRecord>) override {}
PostFreeRecord(UnwindingWorker *,std::vector<FreeRecord>)35 void PostFreeRecord(UnwindingWorker*, std::vector<FreeRecord>) override {}
PostHeapNameRecord(UnwindingWorker *,HeapNameRecord)36 void PostHeapNameRecord(UnwindingWorker*, HeapNameRecord) override {}
PostSocketDisconnected(UnwindingWorker *,DataSourceInstanceID,pid_t,SharedRingBuffer::Stats)37 void PostSocketDisconnected(UnwindingWorker*,
38 DataSourceInstanceID,
39 pid_t,
40 SharedRingBuffer::Stats) override {}
PostDrainDone(UnwindingWorker *,DataSourceInstanceID)41 void PostDrainDone(UnwindingWorker*, DataSourceInstanceID) override {}
42 };
43
FuzzUnwinding(const uint8_t * data,size_t size)44 int FuzzUnwinding(const uint8_t* data, size_t size) {
45 SharedRingBuffer::Buffer buf(const_cast<uint8_t*>(data), size, 0u);
46
47 pid_t self_pid = getpid();
48 DataSourceInstanceID id = 0;
49 UnwindingMetadata metadata(base::OpenFile("/proc/self/maps", O_RDONLY),
50 base::OpenFile("/proc/self/mem", O_RDONLY));
51
52 NopDelegate nop_delegate;
53 UnwindingWorker::ClientData client_data{id,
54 /*sock=*/{},
55 std::move(metadata),
56 /*shmem=*/{},
57 /*client_config=*/{},
58 /*stream_allocations=*/false,
59 /*drain_bytes=*/0,
60 /*free_records=*/{}};
61
62 AllocRecordArena arena;
63 UnwindingWorker::HandleBuffer(nullptr, &arena, buf, &client_data, self_pid,
64 &nop_delegate);
65 return 0;
66 }
67
68 } // namespace
69 } // namespace profiling
70 } // namespace perfetto
71
72 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size);
73
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)74 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
75 return perfetto::profiling::FuzzUnwinding(data, size);
76 }
77