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//===-- ThreadMemory.cpp ----------------------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "Plugins/Process/Utility/ThreadMemory.h"
#include "lldb/Target/OperatingSystem.h"
#include "lldb/Target/RegisterContext.h"
#include "lldb/Target/Process.h"
#include "lldb/Target/StopInfo.h"
#include "lldb/Target/Unwind.h"
using namespace lldb;
using namespace lldb_private;
ThreadMemory::ThreadMemory (Process &process,
tid_t tid,
const ValueObjectSP &thread_info_valobj_sp) :
Thread (process, tid),
m_backing_thread_sp (),
m_thread_info_valobj_sp (thread_info_valobj_sp),
m_name(),
m_queue()
{
}
ThreadMemory::ThreadMemory (Process &process,
lldb::tid_t tid,
const char *name,
const char *queue,
lldb::addr_t register_data_addr) :
Thread (process, tid),
m_backing_thread_sp (),
m_thread_info_valobj_sp (),
m_name(),
m_queue(),
m_register_data_addr (register_data_addr)
{
if (name)
m_name = name;
if (queue)
m_queue = queue;
}
ThreadMemory::~ThreadMemory()
{
DestroyThread();
}
bool
ThreadMemory::WillResume (StateType resume_state)
{
ClearStackFrames();
// Call the Thread::WillResume first. If we stop at a signal, the stop info
// class for signal will set the resume signal that we need below. The signal
// stuff obeys the Process::UnixSignal defaults.
Thread::WillResume(resume_state);
return true;
}
RegisterContextSP
ThreadMemory::GetRegisterContext ()
{
if (m_backing_thread_sp)
return m_backing_thread_sp->GetRegisterContext();
if (!m_reg_context_sp)
{
ProcessSP process_sp (GetProcess());
if (process_sp)
{
OperatingSystem *os = process_sp->GetOperatingSystem ();
if (os)
m_reg_context_sp = os->CreateRegisterContextForThread (this, m_register_data_addr);
}
}
return m_reg_context_sp;
}
RegisterContextSP
ThreadMemory::CreateRegisterContextForFrame (StackFrame *frame)
{
if (m_backing_thread_sp)
return m_backing_thread_sp->CreateRegisterContextForFrame(frame);
RegisterContextSP reg_ctx_sp;
uint32_t concrete_frame_idx = 0;
if (frame)
concrete_frame_idx = frame->GetConcreteFrameIndex ();
if (concrete_frame_idx == 0)
{
reg_ctx_sp = GetRegisterContext ();
}
else
{
Unwind *unwinder = GetUnwinder ();
if (unwinder)
reg_ctx_sp = unwinder->CreateRegisterContextForFrame (frame);
}
return reg_ctx_sp;
}
lldb::StopInfoSP
ThreadMemory::GetPrivateStopReason ()
{
if (m_backing_thread_sp)
return m_backing_thread_sp->GetPrivateStopReason();
ProcessSP process_sp (GetProcess());
if (process_sp)
{
const uint32_t process_stop_id = process_sp->GetStopID();
if (m_thread_stop_reason_stop_id != process_stop_id ||
(m_actual_stop_info_sp && !m_actual_stop_info_sp->IsValid()))
{
if (IsStillAtLastBreakpointHit())
return m_actual_stop_info_sp;
// If GetGDBProcess().SetThreadStopInfo() doesn't find a stop reason
// for this thread, then m_actual_stop_info_sp will not ever contain
// a valid stop reason and the "m_actual_stop_info_sp->IsValid() == false"
// check will never be able to tell us if we have the correct stop info
// for this thread and we will continually send qThreadStopInfo packets
// down to the remote GDB server, so we need to keep our own notion
// of the stop ID that m_actual_stop_info_sp is valid for (even if it
// contains nothing). We use m_thread_stop_reason_stop_id for this below.
m_thread_stop_reason_stop_id = process_stop_id;
m_actual_stop_info_sp.reset();
OperatingSystem *os = process_sp->GetOperatingSystem ();
if (os)
m_actual_stop_info_sp = os->CreateThreadStopReason (this);
}
}
return m_actual_stop_info_sp;
}
void
ThreadMemory::RefreshStateAfterStop()
{
if (m_backing_thread_sp)
return m_backing_thread_sp->RefreshStateAfterStop();
// Don't fetch the registers by calling Thread::GetRegisterContext() below.
// We might not have fetched any registers yet and we don't want to fetch
// the registers just to call invalidate on them...
RegisterContextSP reg_ctx_sp(m_reg_context_sp);
if (reg_ctx_sp)
{
const bool force = true;
reg_ctx_sp->InvalidateIfNeeded (force);
}
}
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