1//===-- ThreadFreeBSDKernel.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 "ThreadFreeBSDKernel.h"
10
11#include "lldb/Target/Unwind.h"
12#include "lldb/Utility/Log.h"
13
14#include "Plugins/Process/Utility/RegisterContextFreeBSD_i386.h"
15#include "Plugins/Process/Utility/RegisterContextFreeBSD_x86_64.h"
16#include "Plugins/Process/Utility/RegisterInfoPOSIX_arm64.h"
17#include "ProcessFreeBSDKernel.h"
18#include "RegisterContextFreeBSDKernel_arm64.h"
19#include "RegisterContextFreeBSDKernel_i386.h"
20#include "RegisterContextFreeBSDKernel_x86_64.h"
21#include "ThreadFreeBSDKernel.h"
22
23using namespace lldb;
24using namespace lldb_private;
25
26ThreadFreeBSDKernel::ThreadFreeBSDKernel(Process &process, lldb::tid_t tid,
27                                         lldb::addr_t pcb_addr,
28                                         std::string thread_name)
29    : Thread(process, tid), m_thread_name(std::move(thread_name)),
30      m_pcb_addr(pcb_addr) {}
31
32ThreadFreeBSDKernel::~ThreadFreeBSDKernel() {}
33
34void ThreadFreeBSDKernel::RefreshStateAfterStop() {}
35
36lldb::RegisterContextSP ThreadFreeBSDKernel::GetRegisterContext() {
37  if (!m_reg_context_sp)
38    m_reg_context_sp = CreateRegisterContextForFrame(nullptr);
39  return m_reg_context_sp;
40}
41
42lldb::RegisterContextSP
43ThreadFreeBSDKernel::CreateRegisterContextForFrame(StackFrame *frame) {
44  RegisterContextSP reg_ctx_sp;
45  uint32_t concrete_frame_idx = 0;
46
47  if (frame)
48    concrete_frame_idx = frame->GetConcreteFrameIndex();
49
50  if (concrete_frame_idx == 0) {
51    if (m_thread_reg_ctx_sp)
52      return m_thread_reg_ctx_sp;
53
54    ProcessFreeBSDKernel *process =
55        static_cast<ProcessFreeBSDKernel *>(GetProcess().get());
56    ArchSpec arch = process->GetTarget().GetArchitecture();
57
58    switch (arch.GetMachine()) {
59    case llvm::Triple::aarch64:
60      m_thread_reg_ctx_sp =
61          std::make_shared<RegisterContextFreeBSDKernel_arm64>(
62              *this, std::make_unique<RegisterInfoPOSIX_arm64>(arch, 0),
63              m_pcb_addr);
64      break;
65    case llvm::Triple::x86:
66      m_thread_reg_ctx_sp = std::make_shared<RegisterContextFreeBSDKernel_i386>(
67          *this, new RegisterContextFreeBSD_i386(arch), m_pcb_addr);
68      break;
69    case llvm::Triple::x86_64:
70      m_thread_reg_ctx_sp =
71          std::make_shared<RegisterContextFreeBSDKernel_x86_64>(
72              *this, new RegisterContextFreeBSD_x86_64(arch), m_pcb_addr);
73      break;
74    default:
75      assert(false && "Unsupported architecture passed to ThreadFreeBSDKernel");
76      break;
77    }
78
79    reg_ctx_sp = m_thread_reg_ctx_sp;
80  } else {
81    reg_ctx_sp = GetUnwinder().CreateRegisterContextForFrame(frame);
82  }
83  return reg_ctx_sp;
84}
85
86bool ThreadFreeBSDKernel::CalculateStopInfo() { return false; }
87