1//===-- IntelPTThreadTraceCollection.cpp ----------------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9#include "IntelPTThreadTraceCollection.h"
10#include <optional>
11
12using namespace lldb;
13using namespace lldb_private;
14using namespace process_linux;
15using namespace llvm;
16
17bool IntelPTThreadTraceCollection::TracesThread(lldb::tid_t tid) const {
18 return m_thread_traces.count(Val: tid);
19}
20
21Error IntelPTThreadTraceCollection::TraceStop(lldb::tid_t tid) {
22 auto it = m_thread_traces.find(Val: tid);
23 if (it == m_thread_traces.end())
24 return createStringError(EC: inconvertibleErrorCode(),
25 Fmt: "Thread %" PRIu64 " not currently traced", Vals: tid);
26 m_total_buffer_size -= it->second.GetIptTraceSize();
27 m_thread_traces.erase(Val: tid);
28 return Error::success();
29}
30
31Error IntelPTThreadTraceCollection::TraceStart(
32 lldb::tid_t tid, const TraceIntelPTStartRequest &request) {
33 if (TracesThread(tid))
34 return createStringError(EC: inconvertibleErrorCode(),
35 Fmt: "Thread %" PRIu64 " already traced", Vals: tid);
36
37 Expected<IntelPTSingleBufferTrace> trace =
38 IntelPTSingleBufferTrace::Start(request, tid);
39 if (!trace)
40 return trace.takeError();
41
42 m_total_buffer_size += trace->GetIptTraceSize();
43 m_thread_traces.try_emplace(Key: tid, Args: std::move(*trace));
44 return Error::success();
45}
46
47size_t IntelPTThreadTraceCollection::GetTotalBufferSize() const {
48 return m_total_buffer_size;
49}
50
51void IntelPTThreadTraceCollection::ForEachThread(
52 std::function<void(lldb::tid_t tid, IntelPTSingleBufferTrace &thread_trace)>
53 callback) {
54 for (auto &it : m_thread_traces)
55 callback(it.first, it.second);
56}
57
58Expected<IntelPTSingleBufferTrace &>
59IntelPTThreadTraceCollection::GetTracedThread(lldb::tid_t tid) {
60 auto it = m_thread_traces.find(Val: tid);
61 if (it == m_thread_traces.end())
62 return createStringError(EC: inconvertibleErrorCode(),
63 Fmt: "Thread %" PRIu64 " not currently traced", Vals: tid);
64 return it->second;
65}
66
67void IntelPTThreadTraceCollection::Clear() {
68 m_thread_traces.clear();
69 m_total_buffer_size = 0;
70}
71
72size_t IntelPTThreadTraceCollection::GetTracedThreadsCount() const {
73 return m_thread_traces.size();
74}
75
76llvm::Expected<std::optional<std::vector<uint8_t>>>
77IntelPTThreadTraceCollection::TryGetBinaryData(
78 const TraceGetBinaryDataRequest &request) {
79 if (!request.tid)
80 return std::nullopt;
81 if (request.kind != IntelPTDataKinds::kIptTrace)
82 return std::nullopt;
83
84 if (!TracesThread(tid: *request.tid))
85 return std::nullopt;
86
87 if (Expected<IntelPTSingleBufferTrace &> trace =
88 GetTracedThread(tid: *request.tid))
89 return trace->GetIptTrace();
90 else
91 return trace.takeError();
92}
93

source code of lldb/source/Plugins/Process/Linux/IntelPTThreadTraceCollection.cpp