1//===-- ThreadGDBRemote.cpp -------------------------------------*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9 10 11#include "ThreadGDBRemote.h" 12 13#include "lldb/Breakpoint/Watchpoint.h" 14#include "lldb/Core/ArchSpec.h" 15#include "lldb/Core/DataExtractor.h" 16#include "lldb/Core/State.h" 17#include "lldb/Core/StreamString.h" 18#include "lldb/Target/Platform.h" 19#include "lldb/Target/Process.h" 20#include "lldb/Target/RegisterContext.h" 21#include "lldb/Target/StopInfo.h" 22#include "lldb/Target/SystemRuntime.h" 23#include "lldb/Target/Target.h" 24#include "lldb/Target/Unwind.h" 25 26#include "ProcessGDBRemote.h" 27#include "ProcessGDBRemoteLog.h" 28#include "Utility/StringExtractorGDBRemote.h" 29 30using namespace lldb; 31using namespace lldb_private; 32 33//---------------------------------------------------------------------- 34// Thread Registers 35//---------------------------------------------------------------------- 36 37ThreadGDBRemote::ThreadGDBRemote (Process &process, lldb::tid_t tid) : 38 Thread(process, tid), 39 m_thread_name (), 40 m_dispatch_queue_name (), 41 m_thread_dispatch_qaddr (LLDB_INVALID_ADDRESS) 42{ 43 ProcessGDBRemoteLog::LogIf(GDBR_LOG_THREAD, "%p: ThreadGDBRemote::ThreadGDBRemote (pid = %i, tid = 0x%4.4x)", 44 this, 45 process.GetID(), 46 GetID()); 47} 48 49ThreadGDBRemote::~ThreadGDBRemote () 50{ 51 ProcessSP process_sp(GetProcess()); 52 ProcessGDBRemoteLog::LogIf(GDBR_LOG_THREAD, "%p: ThreadGDBRemote::~ThreadGDBRemote (pid = %i, tid = 0x%4.4x)", 53 this, 54 process_sp ? process_sp->GetID() : LLDB_INVALID_PROCESS_ID, 55 GetID()); 56 DestroyThread(); 57} 58 59const char * 60ThreadGDBRemote::GetName () 61{ 62 if (m_thread_name.empty()) 63 return NULL; 64 return m_thread_name.c_str(); 65} 66 67 68const char * 69ThreadGDBRemote::GetQueueName () 70{ 71 // Always re-fetch the dispatch queue name since it can change 72 73 if (m_thread_dispatch_qaddr != 0 || m_thread_dispatch_qaddr != LLDB_INVALID_ADDRESS) 74 { 75 ProcessSP process_sp (GetProcess()); 76 if (process_sp) 77 { 78 SystemRuntime *runtime = process_sp->GetSystemRuntime (); 79 if (runtime) 80 { 81 m_dispatch_queue_name = runtime->GetQueueNameFromThreadQAddress (m_thread_dispatch_qaddr); 82 } 83 if (m_dispatch_queue_name.length() > 0) 84 { 85 return m_dispatch_queue_name.c_str(); 86 } 87 } 88 } 89 return NULL; 90} 91 92queue_id_t 93ThreadGDBRemote::GetQueueID () 94{ 95 if (m_thread_dispatch_qaddr != 0 || m_thread_dispatch_qaddr != LLDB_INVALID_ADDRESS) 96 { 97 ProcessSP process_sp (GetProcess()); 98 if (process_sp) 99 { 100 SystemRuntime *runtime = process_sp->GetSystemRuntime (); 101 if (runtime) 102 { 103 return runtime->GetQueueIDFromThreadQAddress (m_thread_dispatch_qaddr); 104 } 105 } 106 } 107 return LLDB_INVALID_QUEUE_ID; 108} 109 110void 111ThreadGDBRemote::WillResume (StateType resume_state) 112{ 113 int signo = GetResumeSignal(); 114 const lldb::user_id_t tid = GetProtocolID(); 115 Log *log(lldb_private::GetLogIfAnyCategoriesSet (GDBR_LOG_THREAD)); 116 if (log) 117 log->Printf ("Resuming thread: %4.4" PRIx64 " with state: %s.", tid, StateAsCString(resume_state)); 118 119 ProcessSP process_sp (GetProcess()); 120 if (process_sp) 121 { 122 ProcessGDBRemote *gdb_process = static_cast<ProcessGDBRemote *>(process_sp.get()); 123 switch (resume_state) 124 { 125 case eStateSuspended: 126 case eStateStopped: 127 // Don't append anything for threads that should stay stopped. 128 break; 129 130 case eStateRunning: 131 if (gdb_process->GetUnixSignals().SignalIsValid (signo)) 132 gdb_process->m_continue_C_tids.push_back(std::make_pair(tid, signo)); 133 else 134 gdb_process->m_continue_c_tids.push_back(tid); 135 break; 136 137 case eStateStepping: 138 if (gdb_process->GetUnixSignals().SignalIsValid (signo)) 139 gdb_process->m_continue_S_tids.push_back(std::make_pair(tid, signo)); 140 else 141 gdb_process->m_continue_s_tids.push_back(tid); 142 break; 143 144 default: 145 break; 146 } 147 } 148} 149 150void 151ThreadGDBRemote::RefreshStateAfterStop() 152{ 153 // Invalidate all registers in our register context. We don't set "force" to 154 // true because the stop reply packet might have had some register values 155 // that were expedited and these will already be copied into the register 156 // context by the time this function gets called. The GDBRemoteRegisterContext 157 // class has been made smart enough to detect when it needs to invalidate 158 // which registers are valid by putting hooks in the register read and 159 // register supply functions where they check the process stop ID and do 160 // the right thing. 161 const bool force = false; 162 GetRegisterContext()->InvalidateIfNeeded (force); 163} 164 165bool 166ThreadGDBRemote::ThreadIDIsValid (lldb::tid_t thread) 167{ 168 return thread != 0; 169} 170 171void 172ThreadGDBRemote::Dump(Log *log, uint32_t index) 173{ 174} 175 176 177bool 178ThreadGDBRemote::ShouldStop (bool &step_more) 179{ 180 return true; 181} 182lldb::RegisterContextSP 183ThreadGDBRemote::GetRegisterContext () 184{ 185 if (m_reg_context_sp.get() == NULL) 186 m_reg_context_sp = CreateRegisterContextForFrame (NULL); 187 return m_reg_context_sp; 188} 189 190lldb::RegisterContextSP 191ThreadGDBRemote::CreateRegisterContextForFrame (StackFrame *frame) 192{ 193 lldb::RegisterContextSP reg_ctx_sp; 194 uint32_t concrete_frame_idx = 0; 195 196 if (frame) 197 concrete_frame_idx = frame->GetConcreteFrameIndex (); 198 199 200 if (concrete_frame_idx == 0) 201 { 202 ProcessSP process_sp (GetProcess()); 203 if (process_sp) 204 { 205 ProcessGDBRemote *gdb_process = static_cast<ProcessGDBRemote *>(process_sp.get()); 206 // read_all_registers_at_once will be true if 'p' packet is not supported. 207 bool read_all_registers_at_once = !gdb_process->GetGDBRemote().GetpPacketSupported (GetID()); 208 reg_ctx_sp.reset (new GDBRemoteRegisterContext (*this, concrete_frame_idx, gdb_process->m_register_info, read_all_registers_at_once)); 209 } 210 } 211 else 212 { 213 Unwind *unwinder = GetUnwinder (); 214 if (unwinder) 215 reg_ctx_sp = unwinder->CreateRegisterContextForFrame (frame); 216 } 217 return reg_ctx_sp; 218} 219 220bool 221ThreadGDBRemote::PrivateSetRegisterValue (uint32_t reg, StringExtractor &response) 222{ 223 GDBRemoteRegisterContext *gdb_reg_ctx = static_cast<GDBRemoteRegisterContext *>(GetRegisterContext ().get()); 224 assert (gdb_reg_ctx); 225 return gdb_reg_ctx->PrivateSetRegisterValue (reg, response); 226} 227 228bool 229ThreadGDBRemote::CalculateStopInfo () 230{ 231 ProcessSP process_sp (GetProcess()); 232 if (process_sp) 233 { 234 StringExtractorGDBRemote stop_packet; 235 ProcessGDBRemote *gdb_process = static_cast<ProcessGDBRemote *>(process_sp.get()); 236 if (gdb_process->GetGDBRemote().GetThreadStopInfo(GetProtocolID(), stop_packet)) 237 return gdb_process->SetThreadStopInfo (stop_packet) == eStateStopped; 238 } 239 return false; 240} 241 242 243