1 //===-- ThreadMemory.cpp --------------------------------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #include "Plugins/Process/Utility/ThreadMemory.h" 10 11 #include "Plugins/Process/Utility/RegisterContextThreadMemory.h" 12 #include "lldb/Target/OperatingSystem.h" 13 #include "lldb/Target/Process.h" 14 #include "lldb/Target/RegisterContext.h" 15 #include "lldb/Target/StopInfo.h" 16 #include "lldb/Target/Unwind.h" 17 18 #include <memory> 19 20 using namespace lldb; 21 using namespace lldb_private; 22 23 ThreadMemory::ThreadMemory(Process &process, tid_t tid, 24 const ValueObjectSP &thread_info_valobj_sp) 25 : Thread(process, tid), m_backing_thread_sp(), 26 m_thread_info_valobj_sp(thread_info_valobj_sp), m_name(), m_queue() {} 27 28 ThreadMemory::ThreadMemory(Process &process, lldb::tid_t tid, 29 llvm::StringRef name, llvm::StringRef queue, 30 lldb::addr_t register_data_addr) 31 : Thread(process, tid), m_backing_thread_sp(), m_thread_info_valobj_sp(), 32 m_name(std::string(name)), m_queue(std::string(queue)), 33 m_register_data_addr(register_data_addr) {} 34 35 ThreadMemory::~ThreadMemory() { DestroyThread(); } 36 37 void ThreadMemory::WillResume(StateType resume_state) { 38 if (m_backing_thread_sp) 39 m_backing_thread_sp->WillResume(resume_state); 40 } 41 42 void ThreadMemory::ClearStackFrames() { 43 if (m_backing_thread_sp) 44 m_backing_thread_sp->ClearStackFrames(); 45 Thread::ClearStackFrames(); 46 } 47 48 RegisterContextSP ThreadMemory::GetRegisterContext() { 49 if (!m_reg_context_sp) 50 m_reg_context_sp = std::make_shared<RegisterContextThreadMemory>( 51 *this, m_register_data_addr); 52 return m_reg_context_sp; 53 } 54 55 RegisterContextSP 56 ThreadMemory::CreateRegisterContextForFrame(StackFrame *frame) { 57 uint32_t concrete_frame_idx = 0; 58 59 if (frame) 60 concrete_frame_idx = frame->GetConcreteFrameIndex(); 61 62 if (concrete_frame_idx == 0) 63 return GetRegisterContext(); 64 return GetUnwinder().CreateRegisterContextForFrame(frame); 65 } 66 67 bool ThreadMemory::CalculateStopInfo() { 68 if (m_backing_thread_sp) { 69 lldb::StopInfoSP backing_stop_info_sp( 70 m_backing_thread_sp->GetPrivateStopInfo()); 71 if (backing_stop_info_sp && 72 backing_stop_info_sp->IsValidForOperatingSystemThread(*this)) { 73 backing_stop_info_sp->SetThread(shared_from_this()); 74 SetStopInfo(backing_stop_info_sp); 75 return true; 76 } 77 } else { 78 ProcessSP process_sp(GetProcess()); 79 80 if (process_sp) { 81 OperatingSystem *os = process_sp->GetOperatingSystem(); 82 if (os) { 83 SetStopInfo(os->CreateThreadStopReason(this)); 84 return true; 85 } 86 } 87 } 88 return false; 89 } 90 91 void ThreadMemory::RefreshStateAfterStop() { 92 if (m_backing_thread_sp) 93 return m_backing_thread_sp->RefreshStateAfterStop(); 94 95 if (m_reg_context_sp) 96 m_reg_context_sp->InvalidateAllRegisters(); 97 } 98