HistoryThread.cpp
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//===-- HistoryThread.cpp ---------------------------------------*- C++ -*-===//
//
// 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 "lldb/lldb-private.h"
#include "Plugins/Process/Utility/HistoryThread.h"
#include "Plugins/Process/Utility/HistoryUnwind.h"
#include "Plugins/Process/Utility/RegisterContextHistory.h"
#include "lldb/Target/Process.h"
#include "lldb/Target/StackFrameList.h"
#include "lldb/Utility/Log.h"
#include <memory>
using namespace lldb;
using namespace lldb_private;
// Constructor
HistoryThread::HistoryThread(lldb_private::Process &process, lldb::tid_t tid,
std::vector<lldb::addr_t> pcs)
: Thread(process, tid, true), m_framelist_mutex(), m_framelist(),
m_pcs(pcs), m_extended_unwind_token(LLDB_INVALID_ADDRESS), m_queue_name(),
m_thread_name(), m_originating_unique_thread_id(tid),
m_queue_id(LLDB_INVALID_QUEUE_ID) {
m_unwinder_up.reset(new HistoryUnwind(*this, pcs));
Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_OBJECT));
LLDB_LOGF(log, "%p HistoryThread::HistoryThread", static_cast<void *>(this));
}
// Destructor
HistoryThread::~HistoryThread() {
Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_OBJECT));
LLDB_LOGF(log, "%p HistoryThread::~HistoryThread (tid=0x%" PRIx64 ")",
static_cast<void *>(this), GetID());
DestroyThread();
}
lldb::RegisterContextSP HistoryThread::GetRegisterContext() {
RegisterContextSP rctx;
if (m_pcs.size() > 0) {
rctx = std::make_shared<RegisterContextHistory>(
*this, 0, GetProcess()->GetAddressByteSize(), m_pcs[0]);
}
return rctx;
}
lldb::RegisterContextSP
HistoryThread::CreateRegisterContextForFrame(StackFrame *frame) {
return m_unwinder_up->CreateRegisterContextForFrame(frame);
}
lldb::StackFrameListSP HistoryThread::GetStackFrameList() {
// FIXME do not throw away the lock after we acquire it..
std::unique_lock<std::mutex> lock(m_framelist_mutex);
lock.unlock();
if (m_framelist.get() == nullptr) {
m_framelist =
std::make_shared<StackFrameList>(*this, StackFrameListSP(), true);
}
return m_framelist;
}
uint32_t HistoryThread::GetExtendedBacktraceOriginatingIndexID() {
if (m_originating_unique_thread_id != LLDB_INVALID_THREAD_ID) {
if (GetProcess()->HasAssignedIndexIDToThread(
m_originating_unique_thread_id)) {
return GetProcess()->AssignIndexIDToThread(
m_originating_unique_thread_id);
}
}
return LLDB_INVALID_THREAD_ID;
}