| /* |
| * Copyright (C) 2018 The Android Open Source Project |
| * |
| * 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 <stddef.h> |
| #include <stdint.h> |
| |
| #include <algorithm> |
| |
| #include "perfetto/base/logging.h" |
| #include "perfetto/ext/base/utils.h" |
| #include "perfetto/protozero/scattered_stream_null_delegate.h" |
| #include "perfetto/protozero/scattered_stream_writer.h" |
| #include "src/traced/probes/ftrace/cpu_reader.h" |
| #include "src/traced/probes/ftrace/ftrace_config_muxer.h" |
| #include "src/traced/probes/ftrace/test/cpu_reader_support.h" |
| #include "src/tracing/core/null_trace_writer.h" |
| |
| #include "protos/perfetto/trace/ftrace/ftrace_event_bundle.pbzero.h" |
| |
| namespace perfetto { |
| namespace { |
| |
| uint8_t g_page[base::kPageSize]; |
| |
| } // namespace |
| |
| using perfetto::protos::pbzero::FtraceEventBundle; |
| |
| void FuzzCpuReaderParsePage(const uint8_t* data, size_t size); |
| void FuzzCpuReaderProcessPagesForDataSource(const uint8_t* data, size_t size); |
| |
| // TODO(rsavitski): make the fuzzer generate multi-page payloads. |
| void FuzzCpuReaderProcessPagesForDataSource(const uint8_t* data, size_t size) { |
| ProtoTranslationTable* table = GetTable("synthetic"); |
| if (!table) { |
| PERFETTO_FATAL( |
| "Could not read table. " |
| "This fuzzer must be run in the root directory."); |
| } |
| memset(g_page, 0, base::kPageSize); |
| memcpy(g_page, data, std::min(base::kPageSize, size)); |
| |
| FtraceMetadata metadata{}; |
| FtraceDataSourceConfig ds_config{EventFilter{}, |
| EventFilter{}, |
| DisabledCompactSchedConfigForTesting(), |
| base::nullopt, |
| {}, |
| {}, |
| /*symbolize_ksyms=*/false, |
| /*preserve_ftrace_buffer=*/false, |
| {}}; |
| ds_config.event_filter.AddEnabledEvent( |
| table->EventToFtraceId(GroupAndName("sched", "sched_switch"))); |
| ds_config.event_filter.AddEnabledEvent( |
| table->EventToFtraceId(GroupAndName("ftrace", "print"))); |
| |
| NullTraceWriter null_writer; |
| CpuReader::ProcessPagesForDataSource( |
| &null_writer, &metadata, /*cpu=*/0, &ds_config, g_page, /*pages_read=*/1, |
| table, /*symbolizer*/ nullptr, /*ftrace_clock_snapshot=*/nullptr, |
| protos::pbzero::FTRACE_CLOCK_UNSPECIFIED); |
| } |
| |
| } // namespace perfetto |
| |
| extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size); |
| |
| extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) { |
| perfetto::FuzzCpuReaderProcessPagesForDataSource(data, size); |
| return 0; |
| } |