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//===-- LinuxThread.cpp -----------------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// C Includes
#include <errno.h>
// C++ Includes
// Other libraries and framework includes
#include "lldb/Target/Process.h"
#include "lldb/Target/StopInfo.h"
#include "lldb/Target/Target.h"
#include "LinuxThread.h"
#include "ProcessLinux.h"
#include "ProcessMonitor.h"
#include "RegisterContextLinux_x86_64.h"
#include "UnwindLLDB.h"
using namespace lldb_private;
LinuxThread::LinuxThread(Process &process, lldb::tid_t tid)
: Thread(process, tid),
m_frame_ap(0),
m_stop_info_id(0),
m_note(eNone)
{
}
LinuxThread::~LinuxThread()
{
DestroyThread();
}
ProcessMonitor &
LinuxThread::GetMonitor()
{
ProcessLinux &process = static_cast<ProcessLinux&>(GetProcess());
return process.GetMonitor();
}
void
LinuxThread::RefreshStateAfterStop()
{
RefreshPrivateStopReason();
}
const char *
LinuxThread::GetInfo()
{
return NULL;
}
lldb::RegisterContextSP
LinuxThread::GetRegisterContext()
{
ProcessLinux &process = static_cast<ProcessLinux&>(GetProcess());
if (!m_reg_context_sp)
{
ArchSpec arch = process.GetTarget().GetArchitecture();
switch (arch.GetGenericCPUType())
{
default:
assert(false && "CPU type not supported!");
break;
case ArchSpec::eCPU_x86_64:
m_reg_context_sp.reset(new RegisterContextLinux_x86_64(*this, 0));
break;
}
}
return m_reg_context_sp;
}
bool
LinuxThread::SaveFrameZeroState(RegisterCheckpoint &checkpoint)
{
return false;
}
bool
LinuxThread::RestoreSaveFrameZero(const RegisterCheckpoint &checkpoint)
{
return false;
}
lldb::RegisterContextSP
LinuxThread::CreateRegisterContextForFrame(lldb_private::StackFrame *frame)
{
lldb::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
reg_ctx_sp = GetUnwinder()->CreateRegisterContextForFrame(frame);
return reg_ctx_sp;
}
lldb::StopInfoSP
LinuxThread::GetPrivateStopReason()
{
const uint32_t process_stop_id = GetProcess().GetStopID();
if (m_stop_info_id != process_stop_id || !m_stop_info || !m_stop_info->IsValid())
RefreshPrivateStopReason();
return m_stop_info;
}
Unwind *
LinuxThread::GetUnwinder()
{
if (m_unwinder_ap.get() == NULL)
m_unwinder_ap.reset(new UnwindLLDB(*this));
return m_unwinder_ap.get();
}
bool
LinuxThread::WillResume(lldb::StateType resume_state)
{
SetResumeState(resume_state);
ClearStackFrames();
if (m_unwinder_ap.get())
m_unwinder_ap->Clear();
return Thread::WillResume(resume_state);
}
bool
LinuxThread::Resume()
{
lldb::StateType resume_state = GetResumeState();
ProcessMonitor &monitor = GetMonitor();
bool status;
switch (GetResumeState())
{
default:
assert(false && "Unexpected state for resume!");
status = false;
break;
case lldb::eStateSuspended:
// FIXME: Implement process suspension.
status = false;
case lldb::eStateRunning:
SetState(resume_state);
status = monitor.Resume(GetID());
break;
case lldb::eStateStepping:
SetState(resume_state);
status = monitor.SingleStep(GetID());
break;
}
m_note = eNone;
return status;
}
void
LinuxThread::BreakNotify()
{
bool status;
status = GetRegisterContextLinux()->UpdateAfterBreakpoint();
assert(status && "Breakpoint update failed!");
// With our register state restored, resolve the breakpoint object
// corresponding to our current PC.
lldb::addr_t pc = GetRegisterContext()->GetPC();
lldb::BreakpointSiteSP bp_site(GetProcess().GetBreakpointSiteList().FindByAddress(pc));
assert(bp_site && bp_site->ValidForThisThread(this));
m_note = eBreak;
m_breakpoint = bp_site;
}
void
LinuxThread::TraceNotify()
{
m_note = eTrace;
}
void
LinuxThread::ExitNotify()
{
m_note = eExit;
}
void
LinuxThread::RefreshPrivateStopReason()
{
m_stop_info_id = GetProcess().GetStopID();
switch (m_note) {
default:
case eNone:
m_stop_info.reset();
break;
case eBreak:
m_stop_info = StopInfo::CreateStopReasonWithBreakpointSiteID(
*this, m_breakpoint->GetID());
break;
case eTrace:
m_stop_info = StopInfo::CreateStopReasonToTrace(*this);
break;
case eExit:
m_stop_info = StopInfo::CreateStopReasonWithSignal(*this, SIGCHLD);
break;
}
}
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