1 // Copyright 2020 The Pigweed Authors
3 // Licensed under the Apache License, Version 2.0 (the "License"); you may not
4 // use this file except in compliance with the License. You may obtain a copy of
7 // https://www.apache.org/licenses/LICENSE-2.0
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
11 // WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
12 // License for the specific language governing permissions and limitations under
14 //==============================================================================
17 // host_clang_debug/obj/pw_trace_tokenized/bin/trace_tokenized_example_filter
20 // .out/host_clang_debug/obj/pw_trace_tokenized/bin/trace_tokenized_example_filter
24 // python pw_trace_tokenized/py/trace_tokenized.py -i trace.bin -o trace.json
25 // ./out/host_clang_debug/obj/pw_trace_tokenized/bin/trace_tokenized_example_basic
28 // In chrome navigate to chrome://tracing, and load the trace.json file.
30 #include "pw_log/log.h"
31 #include "pw_trace/example/sample_app.h"
32 #include "pw_trace/trace.h"
33 #include "pw_trace_tokenized/example/trace_to_file.h"
34 #include "pw_trace_tokenized/trace_callback.h"
35 #include "pw_trace_tokenized/trace_tokenized.h"
37 pw_trace_TraceEventReturnFlags TraceEventCallback(void* user_data,
39 pw_trace_EventType event_type,
43 // Filter out all traces from processing task, which aren't traceId 3
45 PW_UNUSED(event_type);
48 static constexpr uint32_t kFilterId = 3;
49 return (strcmp("Processing", module) == 0 && trace_id != kFilterId)
50 ? PW_TRACE_EVENT_RETURN_FLAGS_SKIP_EVENT
54 int main(int argc, char** argv) { // Take filename as arg
56 PW_LOG_ERROR("Expected output file name as argument.\n");
60 // Register filter callback
61 pw::trace::Callbacks::Instance().RegisterEventCallback(TraceEventCallback);
63 PW_TRACE_SET_ENABLED(true); // Start with tracing enabled
65 // Dump trace data to the file passed in.
66 pw::trace::TraceToFile trace_to_file(argv[1]);
68 PW_LOG_INFO("Running filter example...");