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

source code of lldb/source/Plugins/Process/FreeBSDKernel/ThreadFreeBSDKernel.cpp