| //===-- ThreadKDP.cpp -------------------------------------*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| |
| #include "ThreadKDP.h" |
| |
| #include "llvm/Support/MachO.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 "ProcessKDP.h" |
| #include "ProcessKDPLog.h" |
| #include "RegisterContextKDP_arm.h" |
| #include "RegisterContextKDP_i386.h" |
| #include "RegisterContextKDP_x86_64.h" |
| #include "Plugins/Process/Utility/StopInfoMachException.h" |
| |
| using namespace lldb; |
| using namespace lldb_private; |
| |
| //---------------------------------------------------------------------- |
| // Thread Registers |
| //---------------------------------------------------------------------- |
| |
| ThreadKDP::ThreadKDP (Process &process, lldb::tid_t tid) : |
| Thread(process, tid), |
| m_thread_name (), |
| m_dispatch_queue_name (), |
| m_thread_dispatch_qaddr (LLDB_INVALID_ADDRESS) |
| { |
| ProcessKDPLog::LogIf(KDP_LOG_THREAD, "%p: ThreadKDP::ThreadKDP (tid = 0x%4.4x)", this, GetID()); |
| } |
| |
| ThreadKDP::~ThreadKDP () |
| { |
| ProcessKDPLog::LogIf(KDP_LOG_THREAD, "%p: ThreadKDP::~ThreadKDP (tid = 0x%4.4x)", this, GetID()); |
| DestroyThread(); |
| } |
| |
| const char * |
| ThreadKDP::GetName () |
| { |
| if (m_thread_name.empty()) |
| return NULL; |
| return m_thread_name.c_str(); |
| } |
| |
| const char * |
| ThreadKDP::GetQueueName () |
| { |
| return NULL; |
| } |
| |
| void |
| ThreadKDP::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 KDPRegisterContext |
| // 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; |
| lldb::RegisterContextSP reg_ctx_sp (GetRegisterContext()); |
| if (reg_ctx_sp) |
| reg_ctx_sp->InvalidateIfNeeded (force); |
| } |
| |
| bool |
| ThreadKDP::ThreadIDIsValid (lldb::tid_t thread) |
| { |
| return thread != 0; |
| } |
| |
| void |
| ThreadKDP::Dump(Log *log, uint32_t index) |
| { |
| } |
| |
| |
| bool |
| ThreadKDP::ShouldStop (bool &step_more) |
| { |
| return true; |
| } |
| lldb::RegisterContextSP |
| ThreadKDP::GetRegisterContext () |
| { |
| if (m_reg_context_sp.get() == NULL) |
| m_reg_context_sp = CreateRegisterContextForFrame (NULL); |
| return m_reg_context_sp; |
| } |
| |
| lldb::RegisterContextSP |
| ThreadKDP::CreateRegisterContextForFrame (StackFrame *frame) |
| { |
| lldb::RegisterContextSP reg_ctx_sp; |
| uint32_t concrete_frame_idx = 0; |
| |
| if (frame) |
| concrete_frame_idx = frame->GetConcreteFrameIndex (); |
| |
| if (concrete_frame_idx == 0) |
| { |
| ProcessSP process_sp (CalculateProcess()); |
| if (process_sp) |
| { |
| switch (static_cast<ProcessKDP *>(process_sp.get())->GetCommunication().GetCPUType()) |
| { |
| case llvm::MachO::CPUTypeARM: |
| reg_ctx_sp.reset (new RegisterContextKDP_arm (*this, concrete_frame_idx)); |
| break; |
| case llvm::MachO::CPUTypeI386: |
| reg_ctx_sp.reset (new RegisterContextKDP_i386 (*this, concrete_frame_idx)); |
| break; |
| case llvm::MachO::CPUTypeX86_64: |
| reg_ctx_sp.reset (new RegisterContextKDP_x86_64 (*this, concrete_frame_idx)); |
| break; |
| default: |
| assert (!"Add CPU type support in KDP"); |
| break; |
| } |
| } |
| } |
| else |
| { |
| Unwind *unwinder = GetUnwinder (); |
| if (unwinder) |
| reg_ctx_sp = unwinder->CreateRegisterContextForFrame (frame); |
| } |
| return reg_ctx_sp; |
| } |
| |
| lldb::StopInfoSP |
| ThreadKDP::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 (IsStillAtLastBreakpointHit()) |
| return m_actual_stop_info_sp; |
| |
| if (m_cached_stop_info_sp) |
| SetStopInfo (m_cached_stop_info_sp); |
| else |
| SetStopInfo(StopInfo::CreateStopReasonWithSignal (*this, SIGSTOP)); |
| } |
| } |
| return m_actual_stop_info_sp; |
| } |
| |
| void |
| ThreadKDP::SetStopInfoFrom_KDP_EXCEPTION (const DataExtractor &exc_reply_packet) |
| { |
| lldb::offset_t offset = 0; |
| uint8_t reply_command = exc_reply_packet.GetU8(&offset); |
| if (reply_command == CommunicationKDP::KDP_EXCEPTION) |
| { |
| offset = 8; |
| const uint32_t count = exc_reply_packet.GetU32 (&offset); |
| if (count >= 1) |
| { |
| //const uint32_t cpu = exc_reply_packet.GetU32 (&offset); |
| offset += 4; // Skip the useless CPU field |
| const uint32_t exc_type = exc_reply_packet.GetU32 (&offset); |
| const uint32_t exc_code = exc_reply_packet.GetU32 (&offset); |
| const uint32_t exc_subcode = exc_reply_packet.GetU32 (&offset); |
| // We have to make a copy of the stop info because the thread list |
| // will iterate through the threads and clear all stop infos.. |
| |
| // Let the StopInfoMachException::CreateStopReasonWithMachException() |
| // function update the PC if needed as we might hit a software breakpoint |
| // and need to decrement the PC (i386 and x86_64 need this) and KDP |
| // doesn't do this for us. |
| const bool pc_already_adjusted = false; |
| const bool adjust_pc_if_needed = true; |
| |
| m_cached_stop_info_sp = StopInfoMachException::CreateStopReasonWithMachException (*this, |
| exc_type, |
| 2, |
| exc_code, |
| exc_subcode, |
| 0, |
| pc_already_adjusted, |
| adjust_pc_if_needed); |
| } |
| } |
| } |
| |