BreakpointResolverFileLine.cpp revision 263363 
1//===-- BreakpointResolverFileLine.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/Breakpoint/BreakpointResolverFileLine.h"
11
12// C Includes
13// C++ Includes
14// Other libraries and framework includes
15// Project includes
16#include "lldb/Breakpoint/BreakpointLocation.h"
17#include "lldb/Core/Log.h"
18#include "lldb/Core/Module.h"
19#include "lldb/Core/StreamString.h"
20#include "lldb/Symbol/CompileUnit.h"
21#include "lldb/Symbol/Function.h"
22#include "lldb/lldb-private-log.h"
23
24using namespace lldb;
25using namespace lldb_private;
26
27//----------------------------------------------------------------------
28// BreakpointResolverFileLine:
29//----------------------------------------------------------------------
30BreakpointResolverFileLine::BreakpointResolverFileLine
31(
32    Breakpoint *bkpt,
33    const FileSpec &file_spec,
34    uint32_t line_no,
35    bool check_inlines,
36    bool skip_prologue
37) :
38    BreakpointResolver (bkpt, BreakpointResolver::FileLineResolver),
39    m_file_spec (file_spec),
40    m_line_number (line_no),
41    m_inlines (check_inlines),
42    m_skip_prologue(skip_prologue)
43{
44}
45
46BreakpointResolverFileLine::~BreakpointResolverFileLine ()
47{
48}
49
50Searcher::CallbackReturn
51BreakpointResolverFileLine::SearchCallback
52(
53    SearchFilter &filter,
54    SymbolContext &context,
55    Address *addr,
56    bool containing
57)
58{
59    SymbolContextList sc_list;
60
61    assert (m_breakpoint != NULL);
62
63    // There is a tricky bit here.  You can have two compilation units that #include the same file, and
64    // in one of them the function at m_line_number is used (and so code and a line entry for it is generated) but in the
65    // other it isn't.  If we considered the CU's independently, then in the second inclusion, we'd move the breakpoint
66    // to the next function that actually generated code in the header file.  That would end up being confusing.
67    // So instead, we do the CU iterations by hand here, then scan through the complete list of matches, and figure out
68    // the closest line number match, and only set breakpoints on that match.
69
70    // Note also that if file_spec only had a file name and not a directory, there may be many different file spec's in
71    // the resultant list.  The closest line match for one will not be right for some totally different file.
72    // So we go through the match list and pull out the sets that have the same file spec in their line_entry
73    // and treat each set separately.
74
75    const size_t num_comp_units = context.module_sp->GetNumCompileUnits();
76    for (size_t i = 0; i < num_comp_units; i++)
77    {
78        CompUnitSP cu_sp (context.module_sp->GetCompileUnitAtIndex (i));
79        if (cu_sp)
80        {
81            if (filter.CompUnitPasses(*cu_sp))
82                cu_sp->ResolveSymbolContext (m_file_spec, m_line_number, m_inlines, false, eSymbolContextEverything, sc_list);
83        }
84    }
85    StreamString s;
86    s.Printf ("for %s:%d ",
87                        m_file_spec.GetFilename().AsCString("<Unknown>"),
88                        m_line_number);
89
90    SetSCMatchesByLine (filter, sc_list, m_skip_prologue, s.GetData());
91
92    return Searcher::eCallbackReturnContinue;
93}
94
95Searcher::Depth
96BreakpointResolverFileLine::GetDepth()
97{
98    return Searcher::eDepthModule;
99}
100
101void
102BreakpointResolverFileLine::GetDescription (Stream *s)
103{
104    s->Printf ("file = '%s', line = %u", m_file_spec.GetPath().c_str(), m_line_number);
105}
106
107void
108BreakpointResolverFileLine::Dump (Stream *s) const
109{
110
111}
112
113