d821c997aa
These three classes have no external dependencies, but they are used from various low-level APIs. Moving them down to Utility improves overall code layering (although it still does not break any particular dependency completely). The XCode project will need to be updated after this change. Differential Revision: https://reviews.llvm.org/D49740 llvm-svn: 339127
148 lines
4.7 KiB
C++
148 lines
4.7 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 "lldb/Utility/Log.h"
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#include "lldb/Utility/Logging.h"
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#include "lldb/Utility/State.h"
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#include "Plugins/Process/Utility/UnwindLLDB.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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#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_thread_reg_ctx_sp(), 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 = CreateRegisterContextForFrame(nullptr);
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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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RegisterContextSP reg_ctx_sp;
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uint32_t concrete_frame_idx = 0;
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Log *log(GetLogIfAllCategoriesSet(LIBLLDB_LOG_THREAD));
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if (frame)
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concrete_frame_idx = frame->GetConcreteFrameIndex();
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if (concrete_frame_idx == 0) {
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if (!m_thread_reg_ctx_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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LLDB_LOG(log, "This is a Wow64 process, we should create a "
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"RegisterContextWindows_Wow64, but we don't.");
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#else
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m_thread_reg_ctx_sp.reset(
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new RegisterContextWindows_x86(*this, concrete_frame_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_thread_reg_ctx_sp.reset(
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new RegisterContextWindows_x64(*this, concrete_frame_idx));
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#else
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LLDB_LOG(log, "LLDB is 32-bit, but the target process is 64-bit.");
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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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reg_ctx_sp = m_thread_reg_ctx_sp;
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} else {
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Unwind *unwinder = GetUnwinder();
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if (unwinder != nullptr)
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reg_ctx_sp = unwinder->CreateRegisterContextForFrame(frame);
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}
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return reg_ctx_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)
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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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Status 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 Status();
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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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// ResumeThread returns -1 on error, or the thread's *previous* suspend
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// count on success. This means that the return value is 1 when the thread
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// was restarted. Note that DWORD is an unsigned int, so we need to
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// explicitly compare with -1.
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previous_suspend_count = ::ResumeThread(thread_handle);
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if (previous_suspend_count == (DWORD)-1)
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return Status(::GetLastError(), eErrorTypeWin32);
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} while (previous_suspend_count > 1);
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}
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return Status();
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}
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