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9d66337f90
Add a basic RPC service to trace which currently provides 3 RPCs: - Enable(bool), Turns tracing on or off - IsEnabled, Returns if tracing is currently on or off - GetTraceData, Streams the encoded trace data. This CL also adds a python script which uses these RPCs to retrieve and decode trace data from a connected device. Change-Id: Iaceb3fa87017939a17512738101af70bf335504a Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/31880 Reviewed-by: Paul Mathieu <paulmathieu@google.com> Commit-Queue: Rob Oliver <rgoliver@google.com>
63 lines
2.2 KiB
C++
63 lines
2.2 KiB
C++
// Copyright 2021 The Pigweed Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License"); you may not
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// use this file except in compliance with the License. You may obtain a copy of
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// the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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// License for the specific language governing permissions and limitations under
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// the License.
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//==============================================================================
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#include "pw_trace_tokenized/trace_rpc_service_nanopb.h"
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#include "pw_log/log.h"
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#include "pw_preprocessor/util.h"
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#include "pw_trace_tokenized/trace_buffer.h"
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#include "pw_trace_tokenized/trace_tokenized.h"
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namespace pw::trace {
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pw::Status TraceService::Enable(ServerContext&,
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const pw_trace_TraceEnableMessage& request,
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pw_trace_TraceEnableMessage& response) {
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TokenizedTrace::Instance().Enable(request.enable);
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response.enable = TokenizedTrace::Instance().IsEnabled();
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return PW_STATUS_OK;
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}
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pw::Status TraceService::IsEnabled(ServerContext&,
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const pw_trace_Empty&,
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pw_trace_TraceEnableMessage& response) {
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response.enable = TokenizedTrace::Instance().IsEnabled();
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return PW_STATUS_OK;
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}
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void TraceService::GetTraceData(
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ServerContext&,
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const pw_trace_Empty&,
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ServerWriter<pw_trace_TraceDataMessage>& writer) {
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pw_trace_TraceDataMessage buffer = pw_trace_TraceDataMessage_init_default;
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size_t size = 0;
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pw::ring_buffer::PrefixedEntryRingBuffer* trace_buffer =
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pw::trace::GetBuffer();
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while (trace_buffer->PeekFront(
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std::as_writable_bytes(std::span(buffer.data.bytes)), &size) !=
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pw::Status::OutOfRange()) {
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trace_buffer->PopFront();
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buffer.data.size = size;
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pw::Status status = writer.Write(buffer);
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if (!status.ok()) {
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PW_LOG_ERROR("Error sending trace; abandoning trace dump. Error: %s",
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status.str());
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break;
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}
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}
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writer.Finish();
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}
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} // namespace pw::trace
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