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 
24 using namespace lldb;
25 using namespace lldb_private;
26 
27 //----------------------------------------------------------------------
28 // BreakpointResolverFileLine:
29 //----------------------------------------------------------------------
30 BreakpointResolverFileLine::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 
46 BreakpointResolverFileLine::~BreakpointResolverFileLine ()
47 {
48 }
49 
50 Searcher::CallbackReturn
51 BreakpointResolverFileLine::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 
95 Searcher::Depth
96 BreakpointResolverFileLine::GetDepth()
97 {
98     return Searcher::eDepthModule;
99 }
100 
101 void
102 BreakpointResolverFileLine::GetDescription (Stream *s)
103 {
104     s->Printf ("file = '%s', line = %u", m_file_spec.GetPath().c_str(), m_line_number);
105 }
106 
107 void
108 BreakpointResolverFileLine::Dump (Stream *s) const
109 {
110 
111 }
112 
113