| //===-- ThreadGDBRemote.cpp -------------------------------------*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| |
| #include "ThreadGDBRemote.h" |
| |
| #include "lldb/Core/ArchSpec.h" |
| #include "lldb/Core/DataExtractor.h" |
| #include "lldb/Core/StreamString.h" |
| #include "lldb/Target/Process.h" |
| #include "lldb/Target/RegisterContext.h" |
| #include "lldb/Target/StopInfo.h" |
| #include "lldb/Target/Target.h" |
| #include "lldb/Target/Unwind.h" |
| #include "lldb/Breakpoint/WatchpointLocation.h" |
| |
| #include "LibUnwindRegisterContext.h" |
| #include "ProcessGDBRemote.h" |
| #include "ProcessGDBRemoteLog.h" |
| #include "Utility/StringExtractorGDBRemote.h" |
| #include "UnwindLibUnwind.h" |
| #include "UnwindMacOSXFrameBackchain.h" |
| |
| using namespace lldb; |
| using namespace lldb_private; |
| |
| //---------------------------------------------------------------------- |
| // Thread Registers |
| //---------------------------------------------------------------------- |
| |
| ThreadGDBRemote::ThreadGDBRemote (ProcessGDBRemote &process, lldb::tid_t tid) : |
| Thread(process, tid), |
| m_thread_name (), |
| m_dispatch_queue_name (), |
| m_thread_dispatch_qaddr (LLDB_INVALID_ADDRESS) |
| { |
| // ProcessGDBRemoteLog::LogIf(GDBR_LOG_THREAD | GDBR_LOG_VERBOSE, "ThreadGDBRemote::ThreadGDBRemote ( pid = %i, tid = 0x%4.4x, )", m_process.GetID(), GetID()); |
| ProcessGDBRemoteLog::LogIf(GDBR_LOG_THREAD, "%p: ThreadGDBRemote::ThreadGDBRemote (pid = %i, tid = 0x%4.4x)", this, m_process.GetID(), GetID()); |
| } |
| |
| ThreadGDBRemote::~ThreadGDBRemote () |
| { |
| ProcessGDBRemoteLog::LogIf(GDBR_LOG_THREAD, "%p: ThreadGDBRemote::~ThreadGDBRemote (pid = %i, tid = 0x%4.4x)", this, m_process.GetID(), GetID()); |
| } |
| |
| |
| const char * |
| ThreadGDBRemote::GetInfo () |
| { |
| return NULL; |
| } |
| |
| |
| const char * |
| ThreadGDBRemote::GetName () |
| { |
| if (m_thread_name.empty()) |
| return NULL; |
| return m_thread_name.c_str(); |
| } |
| |
| |
| const char * |
| ThreadGDBRemote::GetQueueName () |
| { |
| // Always re-fetch the dispatch queue name since it can change |
| if (m_thread_dispatch_qaddr != 0 || m_thread_dispatch_qaddr != LLDB_INVALID_ADDRESS) |
| return GetGDBProcess().GetDispatchQueueNameForThread (m_thread_dispatch_qaddr, m_dispatch_queue_name); |
| return NULL; |
| } |
| |
| bool |
| ThreadGDBRemote::WillResume (StateType resume_state) |
| { |
| // TODO: cache for next time in case we can match things up?? |
| ClearStackFrames(); |
| int signo = GetResumeSignal(); |
| |
| switch (resume_state) |
| { |
| case eStateSuspended: |
| case eStateStopped: |
| // Don't append anything for threads that should stay stopped. |
| break; |
| |
| case eStateRunning: |
| if (m_process.GetUnixSignals().SignalIsValid (signo)) |
| GetGDBProcess().m_continue_packet.Printf(";C%2.2x:%4.4x", signo, GetID()); |
| else |
| GetGDBProcess().m_continue_packet.Printf(";c:%4.4x", GetID()); |
| break; |
| |
| case eStateStepping: |
| if (m_process.GetUnixSignals().SignalIsValid (signo)) |
| GetGDBProcess().m_continue_packet.Printf(";S%2.2x:%4.4x", signo, GetID()); |
| else |
| GetGDBProcess().m_continue_packet.Printf(";s:%4.4x", GetID()); |
| break; |
| |
| default: |
| break; |
| } |
| Thread::WillResume(resume_state); |
| return true; |
| } |
| |
| void |
| ThreadGDBRemote::RefreshStateAfterStop() |
| { |
| // Invalidate all registers in our register context |
| GetRegisterContext()->Invalidate(); |
| } |
| |
| Unwind * |
| ThreadGDBRemote::GetUnwinder () |
| { |
| if (m_unwinder_ap.get() == NULL) |
| { |
| const ArchSpec target_arch (GetProcess().GetTarget().GetArchitecture ()); |
| if (target_arch == ArchSpec("x86_64") || target_arch == ArchSpec("i386")) |
| { |
| m_unwinder_ap.reset (new UnwindLibUnwind (*this, GetGDBProcess().GetLibUnwindAddressSpace())); |
| } |
| else |
| { |
| m_unwinder_ap.reset (new UnwindMacOSXFrameBackchain (*this)); |
| } |
| } |
| return m_unwinder_ap.get(); |
| } |
| |
| void |
| ThreadGDBRemote::ClearStackFrames () |
| { |
| Unwind *unwinder = GetUnwinder (); |
| if (unwinder) |
| unwinder->Clear(); |
| Thread::ClearStackFrames(); |
| } |
| |
| |
| bool |
| ThreadGDBRemote::ThreadIDIsValid (lldb::tid_t thread) |
| { |
| return thread != 0; |
| } |
| |
| void |
| ThreadGDBRemote::Dump(Log *log, uint32_t index) |
| { |
| } |
| |
| |
| bool |
| ThreadGDBRemote::ShouldStop (bool &step_more) |
| { |
| return true; |
| } |
| RegisterContext * |
| ThreadGDBRemote::GetRegisterContext () |
| { |
| if (m_reg_context_sp.get() == NULL) |
| m_reg_context_sp.reset (CreateRegisterContextForFrame (NULL)); |
| return m_reg_context_sp.get(); |
| } |
| |
| RegisterContext * |
| ThreadGDBRemote::CreateRegisterContextForFrame (StackFrame *frame) |
| { |
| const bool read_all_registers_at_once = false; |
| uint32_t frame_idx = 0; |
| |
| if (frame) |
| frame_idx = frame->GetFrameIndex (); |
| |
| if (frame_idx == 0) |
| return new GDBRemoteRegisterContext (*this, frame, GetGDBProcess().m_register_info, read_all_registers_at_once); |
| else if (m_unwinder_ap.get()) |
| return m_unwinder_ap->CreateRegisterContextForFrame (frame); |
| return NULL; |
| } |
| |
| bool |
| ThreadGDBRemote::SaveFrameZeroState (RegisterCheckpoint &checkpoint) |
| { |
| lldb::StackFrameSP frame_sp(GetStackFrameAtIndex (0)); |
| if (frame_sp) |
| { |
| checkpoint.SetStackID(frame_sp->GetStackID()); |
| return frame_sp->GetRegisterContext()->ReadAllRegisterValues (checkpoint.GetData()); |
| } |
| return false; |
| } |
| |
| bool |
| ThreadGDBRemote::RestoreSaveFrameZero (const RegisterCheckpoint &checkpoint) |
| { |
| lldb::StackFrameSP frame_sp(GetStackFrameAtIndex (0)); |
| if (frame_sp) |
| { |
| bool ret = frame_sp->GetRegisterContext()->WriteAllRegisterValues (checkpoint.GetData()); |
| frame_sp->GetRegisterContext()->Invalidate(); |
| ClearStackFrames(); |
| return ret; |
| } |
| return false; |
| } |
| |
| lldb::StopInfoSP |
| ThreadGDBRemote::GetPrivateStopReason () |
| { |
| if (m_actual_stop_info_sp.get() == NULL || m_actual_stop_info_sp->IsValid() == false) |
| { |
| m_actual_stop_info_sp.reset(); |
| |
| char packet[256]; |
| ::snprintf(packet, sizeof(packet), "qThreadStopInfo%x", GetID()); |
| StringExtractorGDBRemote stop_packet; |
| if (GetGDBProcess().GetGDBRemote().SendPacketAndWaitForResponse(packet, stop_packet, 1, false)) |
| { |
| std::string copy(stop_packet.GetStringRef()); |
| GetGDBProcess().SetThreadStopInfo (stop_packet); |
| } |
| } |
| return m_actual_stop_info_sp; |
| } |
| |
| |