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
23 // Constructor
24
HistoryUnwind(Thread & thread,std::vector<lldb::addr_t> pcs,bool stop_id_is_valid)25 HistoryUnwind::HistoryUnwind (Thread &thread,
26 std::vector<lldb::addr_t> pcs,
27 bool stop_id_is_valid) :
28 Unwind (thread),
29 m_pcs (pcs),
30 m_stop_id_is_valid (stop_id_is_valid)
31 {
32 }
33
34 // Destructor
35
~HistoryUnwind()36 HistoryUnwind::~HistoryUnwind ()
37 {
38 }
39
40 void
DoClear()41 HistoryUnwind::DoClear ()
42 {
43 Mutex::Locker locker(m_unwind_mutex);
44 m_pcs.clear();
45 m_stop_id_is_valid = false;
46 }
47
48 lldb::RegisterContextSP
DoCreateRegisterContextForFrame(StackFrame * frame)49 HistoryUnwind::DoCreateRegisterContextForFrame (StackFrame *frame)
50 {
51 RegisterContextSP rctx;
52 if (frame)
53 {
54 addr_t pc = frame->GetFrameCodeAddress().GetLoadAddress (&frame->GetThread()->GetProcess()->GetTarget());
55 if (pc != LLDB_INVALID_ADDRESS)
56 {
57 rctx.reset (new RegisterContextHistory (*frame->GetThread().get(), frame->GetConcreteFrameIndex(),
58 frame->GetThread()->GetProcess()->GetAddressByteSize(), pc));
59 }
60 }
61 return rctx;
62 }
63
64 bool
DoGetFrameInfoAtIndex(uint32_t frame_idx,lldb::addr_t & cfa,lldb::addr_t & pc)65 HistoryUnwind::DoGetFrameInfoAtIndex (uint32_t frame_idx, lldb::addr_t& cfa, lldb::addr_t& pc)
66 {
67 Mutex::Locker (m_unwind_mutex); // FIXME do not throw away the lock after we acquire it..
68 if (frame_idx < m_pcs.size())
69 {
70 cfa = frame_idx;
71 pc = m_pcs[frame_idx];
72 return true;
73 }
74 return false;
75 }
76
77 uint32_t
DoGetFrameCount()78 HistoryUnwind::DoGetFrameCount ()
79 {
80 return m_pcs.size();
81 }
82