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
23 using namespace lldb;
24 using namespace lldb_private;
25
26 //----------------------------------------------------------------------
27 // BreakpointResolverFileLine:
28 //----------------------------------------------------------------------
BreakpointResolverFileLine(Breakpoint * bkpt,const FileSpec & file_spec,uint32_t line_no,bool check_inlines,bool skip_prologue,bool exact_match)29 BreakpointResolverFileLine::BreakpointResolverFileLine
30 (
31 Breakpoint *bkpt,
32 const FileSpec &file_spec,
33 uint32_t line_no,
34 bool check_inlines,
35 bool skip_prologue,
36 bool exact_match
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 m_exact_match(exact_match)
44 {
45 }
46
~BreakpointResolverFileLine()47 BreakpointResolverFileLine::~BreakpointResolverFileLine ()
48 {
49 }
50
51 Searcher::CallbackReturn
SearchCallback(SearchFilter & filter,SymbolContext & context,Address * addr,bool containing)52 BreakpointResolverFileLine::SearchCallback
53 (
54 SearchFilter &filter,
55 SymbolContext &context,
56 Address *addr,
57 bool containing
58 )
59 {
60 SymbolContextList sc_list;
61
62 assert (m_breakpoint != NULL);
63
64 // There is a tricky bit here. You can have two compilation units that #include the same file, and
65 // 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
66 // other it isn't. If we considered the CU's independently, then in the second inclusion, we'd move the breakpoint
67 // to the next function that actually generated code in the header file. That would end up being confusing.
68 // So instead, we do the CU iterations by hand here, then scan through the complete list of matches, and figure out
69 // the closest line number match, and only set breakpoints on that match.
70
71 // Note also that if file_spec only had a file name and not a directory, there may be many different file spec's in
72 // the resultant list. The closest line match for one will not be right for some totally different file.
73 // So we go through the match list and pull out the sets that have the same file spec in their line_entry
74 // and treat each set separately.
75
76 const size_t num_comp_units = context.module_sp->GetNumCompileUnits();
77 for (size_t i = 0; i < num_comp_units; i++)
78 {
79 CompUnitSP cu_sp (context.module_sp->GetCompileUnitAtIndex (i));
80 if (cu_sp)
81 {
82 if (filter.CompUnitPasses(*cu_sp))
83 cu_sp->ResolveSymbolContext (m_file_spec, m_line_number, m_inlines, m_exact_match, eSymbolContextEverything, sc_list);
84 }
85 }
86 StreamString s;
87 s.Printf ("for %s:%d ",
88 m_file_spec.GetFilename().AsCString("<Unknown>"),
89 m_line_number);
90
91 SetSCMatchesByLine (filter, sc_list, m_skip_prologue, s.GetData());
92
93 return Searcher::eCallbackReturnContinue;
94 }
95
96 Searcher::Depth
GetDepth()97 BreakpointResolverFileLine::GetDepth()
98 {
99 return Searcher::eDepthModule;
100 }
101
102 void
GetDescription(Stream * s)103 BreakpointResolverFileLine::GetDescription (Stream *s)
104 {
105 s->Printf ("file = '%s', line = %u, exact_match = %d", m_file_spec.GetPath().c_str(), m_line_number, m_exact_match);
106 }
107
108 void
Dump(Stream * s) const109 BreakpointResolverFileLine::Dump (Stream *s) const
110 {
111
112 }
113
114 lldb::BreakpointResolverSP
CopyForBreakpoint(Breakpoint & breakpoint)115 BreakpointResolverFileLine::CopyForBreakpoint (Breakpoint &breakpoint)
116 {
117 lldb::BreakpointResolverSP ret_sp(new BreakpointResolverFileLine(&breakpoint,
118 m_file_spec,
119 m_line_number,
120 m_inlines,
121 m_skip_prologue,
122 m_exact_match));
123
124 return ret_sp;
125 }
126