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 
23 using namespace lldb;
24 using namespace lldb_private;
25 
26 ThreadFreeBSDKernel::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 
32 ThreadFreeBSDKernel::~ThreadFreeBSDKernel() {}
33 
34 void ThreadFreeBSDKernel::RefreshStateAfterStop() {}
35 
36 lldb::RegisterContextSP ThreadFreeBSDKernel::GetRegisterContext() {
37   if (!m_reg_context_sp)
38     m_reg_context_sp = CreateRegisterContextForFrame(nullptr);
39   return m_reg_context_sp;
40 }
41 
42 lldb::RegisterContextSP
43 ThreadFreeBSDKernel::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 
86 bool ThreadFreeBSDKernel::CalculateStopInfo() { return false; }
87