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//===-- TargetThreadWindows.cpp----------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "lldb/Host/HostInfo.h"
#include "lldb/Host/HostNativeThreadBase.h"
#include "lldb/Host/windows/HostThreadWindows.h"
#include "lldb/Host/windows/windows.h"
#include "lldb/Target/RegisterContext.h"
#include "TargetThreadWindows.h"
#include "ProcessWindows.h"
#include "UnwindLLDB.h"
#if !defined(_WIN64)
#include "x86/RegisterContextWindows_x86.h"
#endif
using namespace lldb;
using namespace lldb_private;
TargetThreadWindows::TargetThreadWindows(ProcessWindows &process, const HostThread &thread)
: Thread(process, thread.GetNativeThread().GetThreadId())
, m_host_thread(thread)
{
}
TargetThreadWindows::~TargetThreadWindows()
{
DestroyThread();
}
void
TargetThreadWindows::RefreshStateAfterStop()
{
::SuspendThread(m_host_thread.GetNativeThread().GetSystemHandle());
GetRegisterContext()->InvalidateIfNeeded(false);
}
void
TargetThreadWindows::WillResume(lldb::StateType resume_state)
{
SetResumeState(resume_state);
}
void
TargetThreadWindows::DidStop()
{
}
RegisterContextSP
TargetThreadWindows::GetRegisterContext()
{
if (!m_reg_context_sp)
m_reg_context_sp = CreateRegisterContextForFrameIndex(0);
return m_reg_context_sp;
}
RegisterContextSP
TargetThreadWindows::CreateRegisterContextForFrame(StackFrame *frame)
{
return CreateRegisterContextForFrameIndex(frame->GetConcreteFrameIndex());
}
RegisterContextSP
TargetThreadWindows::CreateRegisterContextForFrameIndex(uint32_t idx)
{
if (!m_reg_context_sp)
{
ArchSpec arch = HostInfo::GetArchitecture();
switch (arch.GetMachine())
{
case llvm::Triple::x86:
#if defined(_WIN64)
// FIXME: This is a Wow64 process, create a RegisterContextWindows_Wow64
#else
m_reg_context_sp.reset(new RegisterContextWindows_x86(*this, idx));
#endif
break;
case llvm::Triple::x86_64:
#if defined(_WIN64)
// FIXME: This is a 64-bit process, create a RegisterContextWindows_x86_64
#else
// LLDB is 32-bit, but the target process is 64-bit. We probably can't debug this.
#endif
default:
break;
}
}
return m_reg_context_sp;
}
bool
TargetThreadWindows::CalculateStopInfo()
{
SetStopInfo(m_stop_info_sp);
return true;
}
Unwind *
TargetThreadWindows::GetUnwinder()
{
// FIXME: Implement an unwinder based on the Windows unwinder exposed through DIA SDK.
if (m_unwinder_ap.get() == NULL)
m_unwinder_ap.reset(new UnwindLLDB(*this));
return m_unwinder_ap.get();
}
bool
TargetThreadWindows::DoResume()
{
StateType resume_state = GetResumeState();
StateType current_state = GetState();
if (resume_state == current_state)
return true;
if (resume_state == eStateStepping)
{
uint32_t flags_index = GetRegisterContext()->ConvertRegisterKindToRegisterNumber(eRegisterKindGeneric, LLDB_REGNUM_GENERIC_FLAGS);
uint64_t flags_value = GetRegisterContext()->ReadRegisterAsUnsigned(flags_index, 0);
flags_value |= 0x100; // Set the trap flag on the CPU
GetRegisterContext()->WriteRegisterFromUnsigned(flags_index, flags_value);
}
if (resume_state == eStateStepping || resume_state == eStateRunning)
{
DWORD previous_suspend_count = 0;
HANDLE thread_handle = m_host_thread.GetNativeThread().GetSystemHandle();
do
{
previous_suspend_count = ::ResumeThread(thread_handle);
} while (previous_suspend_count > 0);
}
return true;
}
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