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//===-- TraceCursorIntelPT.cpp --------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "TraceCursorIntelPT.h"
#include "DecodedThread.h"
#include "TraceIntelPT.h"
#include <cstdlib>
#include <optional>
using namespace lldb;
using namespace lldb_private;
using namespace lldb_private::trace_intel_pt;
using namespace llvm;
TraceCursorIntelPT::TraceCursorIntelPT(
ThreadSP thread_sp, DecodedThreadSP decoded_thread_sp,
const std::optional<LinuxPerfZeroTscConversion> &tsc_conversion,
std::optional<uint64_t> beginning_of_time_nanos)
: TraceCursor(thread_sp), m_decoded_thread_sp(decoded_thread_sp),
m_tsc_conversion(tsc_conversion),
m_beginning_of_time_nanos(beginning_of_time_nanos) {
Seek(0, lldb::eTraceCursorSeekTypeEnd);
}
void TraceCursorIntelPT::Next() {
m_pos += IsForwards() ? 1 : -1;
ClearTimingRangesIfInvalid();
}
void TraceCursorIntelPT::ClearTimingRangesIfInvalid() {
if (m_tsc_range_calculated) {
if (!m_tsc_range || m_pos < 0 || !m_tsc_range->InRange(m_pos)) {
m_tsc_range = None;
m_tsc_range_calculated = false;
}
}
if (m_nanoseconds_range_calculated) {
if (!m_nanoseconds_range || m_pos < 0 ||
!m_nanoseconds_range->InRange(m_pos)) {
m_nanoseconds_range = None;
m_nanoseconds_range_calculated = false;
}
}
}
const std::optional<DecodedThread::TSCRange> &
TraceCursorIntelPT::GetTSCRange() const {
if (!m_tsc_range_calculated) {
m_tsc_range_calculated = true;
m_tsc_range = m_decoded_thread_sp->GetTSCRangeByIndex(m_pos);
}
return m_tsc_range;
}
const std::optional<DecodedThread::NanosecondsRange> &
TraceCursorIntelPT::GetNanosecondsRange() const {
if (!m_nanoseconds_range_calculated) {
m_nanoseconds_range_calculated = true;
m_nanoseconds_range =
m_decoded_thread_sp->GetNanosecondsRangeByIndex(m_pos);
}
return m_nanoseconds_range;
}
bool TraceCursorIntelPT::Seek(int64_t offset,
lldb::TraceCursorSeekType origin) {
switch (origin) {
case lldb::eTraceCursorSeekTypeBeginning:
m_pos = offset;
break;
case lldb::eTraceCursorSeekTypeEnd:
m_pos = m_decoded_thread_sp->GetItemsCount() - 1 + offset;
break;
case lldb::eTraceCursorSeekTypeCurrent:
m_pos += offset;
}
ClearTimingRangesIfInvalid();
return HasValue();
}
bool TraceCursorIntelPT::HasValue() const {
return m_pos >= 0 &&
static_cast<uint64_t>(m_pos) < m_decoded_thread_sp->GetItemsCount();
}
lldb::TraceItemKind TraceCursorIntelPT::GetItemKind() const {
return m_decoded_thread_sp->GetItemKindByIndex(m_pos);
}
llvm::StringRef TraceCursorIntelPT::GetError() const {
return m_decoded_thread_sp->GetErrorByIndex(m_pos);
}
lldb::addr_t TraceCursorIntelPT::GetLoadAddress() const {
return m_decoded_thread_sp->GetInstructionLoadAddress(m_pos);
}
std::optional<uint64_t> TraceCursorIntelPT::GetHWClock() const {
if (const std::optional<DecodedThread::TSCRange> &range = GetTSCRange())
return range->tsc;
return std::nullopt;
}
std::optional<double> TraceCursorIntelPT::GetWallClockTime() const {
if (const std::optional<DecodedThread::NanosecondsRange> &range =
GetNanosecondsRange())
return range->GetInterpolatedTime(m_pos, *m_beginning_of_time_nanos,
*m_tsc_conversion);
return std::nullopt;
}
lldb::cpu_id_t TraceCursorIntelPT::GetCPU() const {
return m_decoded_thread_sp->GetCPUByIndex(m_pos);
}
lldb::TraceEvent TraceCursorIntelPT::GetEventType() const {
return m_decoded_thread_sp->GetEventByIndex(m_pos);
}
bool TraceCursorIntelPT::GoToId(user_id_t id) {
if (!HasId(id))
return false;
m_pos = id;
ClearTimingRangesIfInvalid();
return true;
}
bool TraceCursorIntelPT::HasId(lldb::user_id_t id) const {
return id < m_decoded_thread_sp->GetItemsCount();
}
user_id_t TraceCursorIntelPT::GetId() const { return m_pos; }
std::optional<std::string> TraceCursorIntelPT::GetSyncPointMetadata() const {
return formatv("offset = 0x{0:x}",
m_decoded_thread_sp->GetSyncPointOffsetByIndex(m_pos))
.str();
}
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