1 //===-- HistoryUnwind.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 #include "lldb/lldb-private.h"
11
12 #include "Plugins/Process/Utility/RegisterContextHistory.h"
13 #include "Plugins/Process/Utility/HistoryUnwind.h"
14
15 #include "lldb/Target/StackFrame.h"
16 #include "lldb/Target/Thread.h"
17 #include "lldb/Target/Process.h"
18 #include "lldb/Target/Target.h"
19
20 using namespace lldb;
21 using namespace lldb_private;
22
HistoryUnwind(Thread & thread,std::vector<lldb::addr_t> pcs,uint32_t stop_id,bool stop_id_is_valid)23 HistoryUnwind::HistoryUnwind (Thread &thread,
24 std::vector<lldb::addr_t> pcs,
25 uint32_t stop_id,
26 bool stop_id_is_valid) :
27 Unwind (thread),
28 m_pcs (pcs),
29 m_stop_id (stop_id),
30 m_stop_id_is_valid (stop_id_is_valid)
31 {
32 }
33
~HistoryUnwind()34 HistoryUnwind::~HistoryUnwind ()
35 {
36 }
37
38 void
DoClear()39 HistoryUnwind::DoClear ()
40 {
41 Mutex::Locker locker(m_unwind_mutex);
42 m_pcs.clear();
43 m_stop_id_is_valid = false;
44 }
45
46 lldb::RegisterContextSP
DoCreateRegisterContextForFrame(StackFrame * frame)47 HistoryUnwind::DoCreateRegisterContextForFrame (StackFrame *frame)
48 {
49 RegisterContextSP rctx;
50 if (frame)
51 {
52 addr_t pc = frame->GetFrameCodeAddress().GetLoadAddress (&frame->GetThread()->GetProcess()->GetTarget());
53 if (pc != LLDB_INVALID_ADDRESS)
54 {
55 rctx.reset (new RegisterContextHistory (*frame->GetThread().get(), frame->GetConcreteFrameIndex(),
56 frame->GetThread()->GetProcess()->GetAddressByteSize(), pc));
57 }
58 }
59 return rctx;
60 }
61
62 bool
DoGetFrameInfoAtIndex(uint32_t frame_idx,lldb::addr_t & cfa,lldb::addr_t & pc)63 HistoryUnwind::DoGetFrameInfoAtIndex (uint32_t frame_idx, lldb::addr_t& cfa, lldb::addr_t& pc)
64 {
65 Mutex::Locker (m_unwind_mutex);
66 if (frame_idx < m_pcs.size())
67 {
68 cfa = frame_idx;
69 pc = m_pcs[frame_idx];
70 return true;
71 }
72 return false;
73 }
74
75 uint32_t
DoGetFrameCount()76 HistoryUnwind::DoGetFrameCount ()
77 {
78 return m_pcs.size();
79 }
80