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/*
* 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(),
{},
{},
/*symbolize_ksyms=*/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;
}