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