1 // Copyright 2023 The Pigweed Authors
2 //
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
5 // the License at
6 //
7 // https://www.apache.org/licenses/LICENSE-2.0
8 //
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
13 // the License.
14
15 #include "pw_trace_tokenized/base_trace_service.h"
16
17 #include "pw_log/log.h"
18 #include "pw_trace_tokenized/trace_buffer.h"
19
20 namespace pw::trace {
BaseTraceService(TokenizedTracer & tokenized_tracer,stream::Writer & trace_writer)21 BaseTraceService::BaseTraceService(TokenizedTracer& tokenized_tracer,
22 stream::Writer& trace_writer)
23 : tokenized_tracer_(tokenized_tracer), trace_writer_(trace_writer) {
24 tokenized_tracer_.Enable(false);
25 }
26
Start()27 Status BaseTraceService::Start() {
28 PW_LOG_INFO("Starting Tracing");
29
30 if (tokenized_tracer_.IsEnabled()) {
31 PW_LOG_INFO("Tracing already started");
32 return Status::FailedPrecondition();
33 }
34
35 tokenized_tracer_.Enable(true);
36
37 return OkStatus();
38 }
39
Stop()40 Status BaseTraceService::Stop() {
41 PW_LOG_INFO("Stopping Tracing");
42
43 if (!tokenized_tracer_.IsEnabled()) {
44 PW_LOG_INFO("Tracing not started");
45 return Status::FailedPrecondition();
46 }
47
48 tokenized_tracer_.Enable(false);
49
50 auto ring_buffer = trace::GetBuffer();
51
52 if (ring_buffer->EntryCount() == 0) {
53 PW_LOG_WARN("EntryCount(%zu)", ring_buffer->EntryCount());
54 return Status::Unavailable();
55 } else if (ring_buffer->CheckForCorruption() != OkStatus()) {
56 PW_LOG_ERROR("EntryCount(%zu), Corruption(%d)",
57 ring_buffer->EntryCount(),
58 ring_buffer->CheckForCorruption().code());
59 return Status::Unavailable();
60 }
61
62 PW_LOG_INFO("EntryCount(%zu)", ring_buffer->EntryCount());
63
64 ConstByteSpan inner_trace_span = trace::DeringAndViewRawBuffer();
65 if (auto status = trace_writer_.Write(inner_trace_span);
66 status != OkStatus()) {
67 PW_LOG_ERROR("Failed to write trace data: %d)", status.code());
68 return status;
69 }
70
71 ring_buffer->Clear();
72
73 return OkStatus();
74 }
75
76 } // namespace pw::trace
77