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
20using namespace lldb;
21using namespace lldb_private;
22
23ThreadMemoryProvidingNameAndQueue::ThreadMemoryProvidingNameAndQueue(
24 Process &process, lldb::tid_t tid,
25 const ValueObjectSP &thread_info_valobj_sp)
26 : ThreadMemoryProvidingName(process, tid, LLDB_INVALID_ADDRESS, ""),
27 m_thread_info_valobj_sp(thread_info_valobj_sp), m_queue() {}
28
29ThreadMemoryProvidingNameAndQueue::ThreadMemoryProvidingNameAndQueue(
30 Process &process, lldb::tid_t tid, llvm::StringRef name,
31 llvm::StringRef queue, lldb::addr_t register_data_addr)
32 : ThreadMemoryProvidingName(process, tid, register_data_addr, name),
33 m_thread_info_valobj_sp(), m_queue(std::string(queue)) {}
34
35ThreadMemory::~ThreadMemory() { DestroyThread(); }
36
37void ThreadMemory::WillResume(StateType resume_state) {
38 if (m_backing_thread_sp)
39 m_backing_thread_sp->WillResume(resume_state);
40}
41
42void ThreadMemory::ClearStackFrames() {
43 if (m_backing_thread_sp)
44 m_backing_thread_sp->ClearStackFrames();
45 Thread::ClearStackFrames();
46}
47
48RegisterContextSP ThreadMemory::GetRegisterContext() {
49 if (!m_reg_context_sp)
50 m_reg_context_sp = std::make_shared<RegisterContextThreadMemory>(
51 args&: *this, args&: m_register_data_addr);
52 return m_reg_context_sp;
53}
54
55RegisterContextSP
56ThreadMemory::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
67bool 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(thread&: *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(thread: this));
84 return true;
85 }
86 }
87 }
88 return false;
89}
90
91void 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

source code of lldb/source/Plugins/Process/Utility/ThreadMemory.cpp