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// Copyright 2020 The Pigweed Authors
//
// 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
//
// https://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.
//==============================================================================
// BUILD
// ninja -C out
// pw_strict_host_clang_debug/obj/pw_trace_tokenized/bin/trace_tokenized_example_filter
//
// RUN
// ./out/pw_strict_host_clang_debug/obj/pw_trace_tokenized/bin/trace_tokenized_example_filter
// trace.bin
//
// DECODE
// python pw_trace_tokenized/py/trace_tokenized.py -i trace.bin -o trace.json
// ./out/pw_strict_host_clang_debug/obj/pw_trace_tokenized/bin/trace_tokenized_example_basic#trace
//
// VIEW
// In chrome navigate to chrome://tracing, and load the trace.json file.
#include "pw_log/log.h"
#include "pw_trace/example/sample_app.h"
#include "pw_trace/trace.h"
#include "pw_trace_tokenized/example/trace_to_file.h"
#include "pw_trace_tokenized/trace_callback.h"
#include "pw_trace_tokenized/trace_tokenized.h"
pw_trace_TraceEventReturnFlags TraceEventCallback(
void* /* user_data */, pw_trace_tokenized_TraceEvent* event) {
// Filter out all traces from processing task, which aren't traceId 3
static constexpr uint32_t kFilterId = 3;
return (strcmp("Processing", event->module) == 0 &&
event->trace_id != kFilterId)
? PW_TRACE_EVENT_RETURN_FLAGS_SKIP_EVENT
: 0;
}
int main(int argc, char** argv) { // Take filename as arg
if (argc != 2) {
PW_LOG_ERROR("Expected output file name as argument.\n");
return -1;
}
// Register filter callback
pw::trace::Callbacks& callbacks = pw::trace::GetCallbacks();
callbacks.RegisterEventCallback(TraceEventCallback)
.IgnoreError(); // TODO: b/242598609 - Handle Status properly
PW_TRACE_SET_ENABLED(true); // Start with tracing enabled
// Dump trace data to the file passed in.
pw::trace::TraceToFile trace_to_file(callbacks, argv[1]);
PW_LOG_INFO("Running filter example...");
RunTraceSampleApp();
return 0;
}
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