forked from OSchip/llvm-project
126 lines
3.8 KiB
C++
126 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/Core/State.h"
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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 "lldb/Utility/Log.h"
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#include "lldb/Utility/Logging.h"
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#include "ProcessWindows.h"
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#include "ProcessWindowsLog.h"
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#include "TargetThreadWindows.h"
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#include "UnwindLLDB.h"
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#if defined(_WIN64)
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#include "x64/RegisterContextWindows_x64.h"
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#else
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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,
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const HostThread &thread)
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: Thread(process, thread.GetNativeThread().GetThreadId()),
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m_host_thread(thread) {}
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TargetThreadWindows::~TargetThreadWindows() { DestroyThread(); }
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void TargetThreadWindows::RefreshStateAfterStop() {
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::SuspendThread(m_host_thread.GetNativeThread().GetSystemHandle());
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SetState(eStateStopped);
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GetRegisterContext()->InvalidateIfNeeded(false);
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}
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void TargetThreadWindows::WillResume(lldb::StateType resume_state) {}
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void TargetThreadWindows::DidStop() {}
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RegisterContextSP TargetThreadWindows::GetRegisterContext() {
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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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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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if (!m_reg_context_sp) {
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ArchSpec arch = HostInfo::GetArchitecture();
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switch (arch.GetMachine()) {
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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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m_reg_context_sp.reset(new RegisterContextWindows_x64(*this, idx));
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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
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// 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 TargetThreadWindows::CalculateStopInfo() {
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SetStopInfo(m_stop_info_sp);
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return true;
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}
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Unwind *TargetThreadWindows::GetUnwinder() {
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// FIXME: Implement an unwinder based on the Windows unwinder exposed through
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// 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 TargetThreadWindows::DoResume() {
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StateType resume_state = GetTemporaryResumeState();
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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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uint32_t flags_index =
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GetRegisterContext()->ConvertRegisterKindToRegisterNumber(
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eRegisterKindGeneric, LLDB_REGNUM_GENERIC_FLAGS);
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uint64_t flags_value =
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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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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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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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