f194c50fc3
This hooks up the changes necessary to set the trap flag on the CPU and properly manage the process and thread's resume state and private state so that the ThreadPlan does its thing. Stepping still doesn't work as of this change, because there are some issues with stack frames where it doesn't update the thread's frame list correctly when it breaks inside of a function, but I will try to fix that separately. llvm-svn: 226221
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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DWORD old_suspend_count = ::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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