| //===-- 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/Core/State.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/Watchpoint.h" |
| |
| #include "ProcessGDBRemote.h" |
| #include "ProcessGDBRemoteLog.h" |
| #include "Utility/StringExtractorGDBRemote.h" |
| |
| using namespace lldb; |
| using namespace lldb_private; |
| |
| //---------------------------------------------------------------------- |
| // Thread Registers |
| //---------------------------------------------------------------------- |
| |
| ThreadGDBRemote::ThreadGDBRemote (const ProcessSP &process_sp, lldb::tid_t tid) : |
| Thread(process_sp, tid), |
| m_thread_name (), |
| m_dispatch_queue_name (), |
| m_thread_dispatch_qaddr (LLDB_INVALID_ADDRESS) |
| { |
| ProcessGDBRemoteLog::LogIf(GDBR_LOG_THREAD, "%p: ThreadGDBRemote::ThreadGDBRemote (pid = %i, tid = 0x%4.4x)", |
| this, |
| process_sp ? process_sp->GetID() : LLDB_INVALID_PROCESS_ID, |
| GetID()); |
| } |
| |
| ThreadGDBRemote::~ThreadGDBRemote () |
| { |
| ProcessSP process_sp(GetProcess()); |
| ProcessGDBRemoteLog::LogIf(GDBR_LOG_THREAD, "%p: ThreadGDBRemote::~ThreadGDBRemote (pid = %i, tid = 0x%4.4x)", |
| this, |
| process_sp ? process_sp->GetID() : LLDB_INVALID_PROCESS_ID, |
| GetID()); |
| DestroyThread(); |
| } |
| |
| 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) |
| { |
| ProcessSP process_sp (GetProcess()); |
| if (process_sp) |
| { |
| ProcessGDBRemote *gdb_process = static_cast<ProcessGDBRemote *>(process_sp.get()); |
| return gdb_process->GetDispatchQueueNameForThread (m_thread_dispatch_qaddr, m_dispatch_queue_name); |
| } |
| } |
| return NULL; |
| } |
| |
| bool |
| ThreadGDBRemote::WillResume (StateType resume_state) |
| { |
| ClearStackFrames(); |
| // Call the Thread::WillResume first. If we stop at a signal, the stop info |
| // class for signal will set the resume signal that we need below. The signal |
| // stuff obeys the Process::UnixSignal defaults. |
| Thread::WillResume(resume_state); |
| |
| int signo = GetResumeSignal(); |
| lldb::LogSP log(lldb_private::GetLogIfAnyCategoriesSet (GDBR_LOG_THREAD)); |
| if (log) |
| log->Printf ("Resuming thread: %4.4llx with state: %s.", GetID(), StateAsCString(resume_state)); |
| |
| ProcessSP process_sp (GetProcess()); |
| if (process_sp) |
| { |
| ProcessGDBRemote *gdb_process = static_cast<ProcessGDBRemote *>(process_sp.get()); |
| switch (resume_state) |
| { |
| case eStateSuspended: |
| case eStateStopped: |
| // Don't append anything for threads that should stay stopped. |
| break; |
| |
| case eStateRunning: |
| if (gdb_process->GetUnixSignals().SignalIsValid (signo)) |
| gdb_process->m_continue_C_tids.push_back(std::make_pair(GetID(), signo)); |
| else |
| gdb_process->m_continue_c_tids.push_back(GetID()); |
| break; |
| |
| case eStateStepping: |
| if (gdb_process->GetUnixSignals().SignalIsValid (signo)) |
| gdb_process->m_continue_S_tids.push_back(std::make_pair(GetID(), signo)); |
| else |
| gdb_process->m_continue_s_tids.push_back(GetID()); |
| break; |
| |
| default: |
| break; |
| } |
| return true; |
| } |
| return false; |
| } |
| |
| void |
| ThreadGDBRemote::RefreshStateAfterStop() |
| { |
| // Invalidate all registers in our register context. We don't set "force" to |
| // true because the stop reply packet might have had some register values |
| // that were expedited and these will already be copied into the register |
| // context by the time this function gets called. The GDBRemoteRegisterContext |
| // class has been made smart enough to detect when it needs to invalidate |
| // which registers are valid by putting hooks in the register read and |
| // register supply functions where they check the process stop ID and do |
| // the right thing. |
| const bool force = false; |
| GetRegisterContext()->InvalidateIfNeeded (force); |
| } |
| |
| 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; |
| } |
| lldb::RegisterContextSP |
| ThreadGDBRemote::GetRegisterContext () |
| { |
| if (m_reg_context_sp.get() == NULL) |
| m_reg_context_sp = CreateRegisterContextForFrame (NULL); |
| return m_reg_context_sp; |
| } |
| |
| lldb::RegisterContextSP |
| ThreadGDBRemote::CreateRegisterContextForFrame (StackFrame *frame) |
| { |
| lldb::RegisterContextSP reg_ctx_sp; |
| const bool read_all_registers_at_once = false; |
| uint32_t concrete_frame_idx = 0; |
| |
| if (frame) |
| concrete_frame_idx = frame->GetConcreteFrameIndex (); |
| |
| |
| if (concrete_frame_idx == 0) |
| { |
| ProcessSP process_sp (GetProcess()); |
| if (process_sp) |
| { |
| ProcessGDBRemote *gdb_process = static_cast<ProcessGDBRemote *>(process_sp.get()); |
| reg_ctx_sp.reset (new GDBRemoteRegisterContext (*this, concrete_frame_idx, gdb_process->m_register_info, read_all_registers_at_once)); |
| } |
| } |
| else if (m_unwinder_ap.get()) |
| reg_ctx_sp = m_unwinder_ap->CreateRegisterContextForFrame (frame); |
| return reg_ctx_sp; |
| } |
| |
| bool |
| ThreadGDBRemote::PrivateSetRegisterValue (uint32_t reg, StringExtractor &response) |
| { |
| GDBRemoteRegisterContext *gdb_reg_ctx = static_cast<GDBRemoteRegisterContext *>(GetRegisterContext ().get()); |
| assert (gdb_reg_ctx); |
| return gdb_reg_ctx->PrivateSetRegisterValue (reg, response); |
| } |
| |
| lldb::StopInfoSP |
| ThreadGDBRemote::GetPrivateStopReason () |
| { |
| ProcessSP process_sp (GetProcess()); |
| if (process_sp) |
| { |
| const uint32_t process_stop_id = process_sp->GetStopID(); |
| if (m_thread_stop_reason_stop_id != process_stop_id || |
| (m_actual_stop_info_sp && !m_actual_stop_info_sp->IsValid())) |
| { |
| // If GetGDBProcess().SetThreadStopInfo() doesn't find a stop reason |
| // for this thread, then m_actual_stop_info_sp will not ever contain |
| // a valid stop reason and the "m_actual_stop_info_sp->IsValid() == false" |
| // check will never be able to tell us if we have the correct stop info |
| // for this thread and we will continually send qThreadStopInfo packets |
| // down to the remote GDB server, so we need to keep our own notion |
| // of the stop ID that m_actual_stop_info_sp is valid for (even if it |
| // contains nothing). We use m_thread_stop_reason_stop_id for this below. |
| m_thread_stop_reason_stop_id = process_stop_id; |
| m_actual_stop_info_sp.reset(); |
| |
| StringExtractorGDBRemote stop_packet; |
| ProcessGDBRemote *gdb_process = static_cast<ProcessGDBRemote *>(process_sp.get()); |
| if (gdb_process->GetGDBRemote().GetThreadStopInfo(GetID(), stop_packet)) |
| gdb_process->SetThreadStopInfo (stop_packet); |
| } |
| } |
| return m_actual_stop_info_sp; |
| } |
| |
| |
