1 //===-- ThreadMachCore.cpp --------------------------------------*- C++ -*-===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 
11 #include "ThreadMachCore.h"
12 
13 #include "llvm/Support/MachO.h"
14 
15 #include "lldb/Core/ArchSpec.h"
16 #include "lldb/Core/DataExtractor.h"
17 #include "lldb/Core/StreamString.h"
18 #include "lldb/Core/State.h"
19 #include "lldb/Symbol/ObjectFile.h"
20 #include "lldb/Target/Process.h"
21 #include "lldb/Target/RegisterContext.h"
22 #include "lldb/Target/StopInfo.h"
23 #include "lldb/Target/Target.h"
24 #include "lldb/Target/Unwind.h"
25 #include "lldb/Breakpoint/Watchpoint.h"
26 
27 #include "ProcessMachCore.h"
28 //#include "RegisterContextKDP_arm.h"
29 //#include "RegisterContextKDP_i386.h"
30 //#include "RegisterContextKDP_x86_64.h"
31 
32 using namespace lldb;
33 using namespace lldb_private;
34 
35 //----------------------------------------------------------------------
36 // Thread Registers
37 //----------------------------------------------------------------------
38 
ThreadMachCore(Process & process,lldb::tid_t tid)39 ThreadMachCore::ThreadMachCore (Process &process, lldb::tid_t tid) :
40     Thread(process, tid),
41     m_thread_name (),
42     m_dispatch_queue_name (),
43     m_thread_dispatch_qaddr (LLDB_INVALID_ADDRESS),
44     m_thread_reg_ctx_sp ()
45 {
46 }
47 
~ThreadMachCore()48 ThreadMachCore::~ThreadMachCore ()
49 {
50     DestroyThread();
51 }
52 
53 const char *
GetName()54 ThreadMachCore::GetName ()
55 {
56     if (m_thread_name.empty())
57         return NULL;
58     return m_thread_name.c_str();
59 }
60 
61 void
RefreshStateAfterStop()62 ThreadMachCore::RefreshStateAfterStop()
63 {
64     // Invalidate all registers in our register context. We don't set "force" to
65     // true because the stop reply packet might have had some register values
66     // that were expedited and these will already be copied into the register
67     // context by the time this function gets called. The KDPRegisterContext
68     // class has been made smart enough to detect when it needs to invalidate
69     // which registers are valid by putting hooks in the register read and
70     // register supply functions where they check the process stop ID and do
71     // the right thing.
72     const bool force = false;
73     GetRegisterContext()->InvalidateIfNeeded (force);
74 }
75 
76 bool
ThreadIDIsValid(lldb::tid_t thread)77 ThreadMachCore::ThreadIDIsValid (lldb::tid_t thread)
78 {
79     return thread != 0;
80 }
81 
82 lldb::RegisterContextSP
GetRegisterContext()83 ThreadMachCore::GetRegisterContext ()
84 {
85     if (m_reg_context_sp.get() == NULL)
86         m_reg_context_sp = CreateRegisterContextForFrame (NULL);
87     return m_reg_context_sp;
88 }
89 
90 lldb::RegisterContextSP
CreateRegisterContextForFrame(StackFrame * frame)91 ThreadMachCore::CreateRegisterContextForFrame (StackFrame *frame)
92 {
93     lldb::RegisterContextSP reg_ctx_sp;
94     uint32_t concrete_frame_idx = 0;
95 
96     if (frame)
97         concrete_frame_idx = frame->GetConcreteFrameIndex ();
98 
99     if (concrete_frame_idx == 0)
100     {
101         if (!m_thread_reg_ctx_sp)
102         {
103             ProcessSP process_sp (GetProcess());
104 
105             ObjectFile *core_objfile = static_cast<ProcessMachCore *>(process_sp.get())->GetCoreObjectFile ();
106             if (core_objfile)
107                 m_thread_reg_ctx_sp = core_objfile->GetThreadContextAtIndex (GetID(), *this);
108         }
109         reg_ctx_sp = m_thread_reg_ctx_sp;
110     }
111     else
112     {
113         Unwind *unwinder = GetUnwinder ();
114         if (unwinder)
115             reg_ctx_sp = unwinder->CreateRegisterContextForFrame (frame);
116     }
117     return reg_ctx_sp;
118 }
119 
120 bool
CalculateStopInfo()121 ThreadMachCore::CalculateStopInfo ()
122 {
123     ProcessSP process_sp (GetProcess());
124     if (process_sp)
125     {
126         SetStopInfo(StopInfo::CreateStopReasonWithSignal (*this, SIGSTOP));
127         return true;
128     }
129     return false;
130 }
131 
132 
133