ThreadPlanStepOverRange.cpp revision 24943d2ee8bfaa7cf5893e4709143924157a5c1e 
1//===-- ThreadPlanStepOverRange.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/Target/ThreadPlanStepOverRange.h"
11
12// C Includes
13// C++ Includes
14// Other libraries and framework includes
15// Project includes
16
17#include "lldb/lldb-private-log.h"
18#include "lldb/Core/Log.h"
19#include "lldb/Core/Stream.h"
20#include "lldb/Target/Process.h"
21#include "lldb/Target/RegisterContext.h"
22#include "lldb/Target/Thread.h"
23#include "lldb/Target/ThreadPlanStepOut.h"
24#include "lldb/Target/ThreadPlanStepThrough.h"
25
26using namespace lldb_private;
27
28
29//----------------------------------------------------------------------
30// ThreadPlanStepOverRange: Step through a stack range, either stepping over or into
31// based on the value of \a type.
32//----------------------------------------------------------------------
33
34ThreadPlanStepOverRange::ThreadPlanStepOverRange
35(
36    Thread &thread,
37    const AddressRange &range,
38    const SymbolContext &addr_context,
39    lldb::RunMode stop_others,
40    bool okay_to_discard
41) :
42    ThreadPlanStepRange ("Step range stepping over", thread, range, addr_context, stop_others)
43{
44    SetOkayToDiscard (okay_to_discard);
45}
46
47ThreadPlanStepOverRange::~ThreadPlanStepOverRange ()
48{
49}
50
51void
52ThreadPlanStepOverRange::GetDescription (Stream *s, lldb::DescriptionLevel level)
53{
54    if (level == lldb::eDescriptionLevelBrief)
55        s->Printf("step over");
56    else
57    {
58        s->Printf ("stepping through range (stepping over functions): ");
59        m_address_range.Dump (s, &m_thread.GetProcess(), Address::DumpStyleLoadAddress);
60    }
61}
62
63bool
64ThreadPlanStepOverRange::ShouldStop (Event *event_ptr)
65{
66    Log *log = lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP);
67
68    if (log)
69    {
70        StreamString s;
71        s.Address (m_thread.GetRegisterContext()->GetPC(), m_thread.GetProcess().GetAddressByteSize());
72        log->Printf("ThreadPlanStepOverRange reached %s.", s.GetData());
73    }
74
75    // If we're still in the range, keep going.
76    if (InRange())
77        return false;
78
79    // If we're out of the range but in the same frame or in our caller's frame
80    // then we should stop.
81    // When stepping out we only step if we are forcing running one thread.
82    bool stop_others;
83    if (m_stop_others == lldb::eOnlyThisThread)
84        stop_others = true;
85    else
86        stop_others = false;
87
88    ThreadPlan* new_plan = NULL;
89
90    if (FrameIsOlder())
91        return true;
92    else if (FrameIsYounger())
93    {
94        new_plan = m_thread.QueueThreadPlanForStepOut (false, NULL, true, stop_others, lldb::eVoteNo, lldb::eVoteNoOpinion);
95    }
96    else if (!InSymbol())
97    {
98        // This one is a little tricky.  Sometimes we may be in a stub or something similar,
99        // in which case we need to get out of there.  But if we are in a stub then it's
100        // likely going to be hard to get out from here.  It is probably easiest to step into the
101        // stub, and then it will be straight-forward to step out.
102        new_plan = m_thread.QueueThreadPlanForStepThrough (false, stop_others);
103    }
104
105    if (new_plan == NULL)
106        m_no_more_plans = true;
107    else
108        m_no_more_plans = false;
109
110    if (new_plan == NULL)
111    {
112        // For efficiencies sake, we know we're done here so we don't have to do this
113        // calculation again in MischiefManaged.
114        SetPlanComplete();
115        return true;
116    }
117    else
118        return false;
119}
120