xref: /llvm-project-15.0.7/lldb/source/Plugins/Trace/intel-pt/ThreadDecoder.cpp (revision bdf3e7e5)

//===-- ThreadDecoder.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 "ThreadDecoder.h"

#include "llvm/Support/MemoryBuffer.h"

#include "../common/ThreadPostMortemTrace.h"
#include "LibiptDecoder.h"
#include "TraceIntelPT.h"

#include <utility>

using namespace lldb;
using namespace lldb_private;
using namespace lldb_private::trace_intel_pt;
using namespace llvm;

ThreadDecoder::ThreadDecoder(const ThreadSP &thread_sp, TraceIntelPT &trace)
    : m_thread_sp(thread_sp), m_trace(trace) {}

DecodedThreadSP ThreadDecoder::Decode() {
  if (!m_decoded_thread.hasValue())
    m_decoded_thread = DoDecode();
  return *m_decoded_thread;
}

DecodedThreadSP ThreadDecoder::DoDecode() {
  return m_trace.GetTimer()
      .ForThread(m_thread_sp->GetID())
      .TimeTask<DecodedThreadSP>("Decoding instructions", [&]() {
        DecodedThreadSP decoded_thread_sp =
            std::make_shared<DecodedThread>(m_thread_sp);

        Error err = m_trace.OnThreadBufferRead(
            m_thread_sp->GetID(), [&](llvm::ArrayRef<uint8_t> data) {
              DecodeTrace(*decoded_thread_sp, m_trace, data);
              return Error::success();
            });

        if (err)
          decoded_thread_sp->AppendError(std::move(err));
        return decoded_thread_sp;
      });
}