1 //===-- LogChannelDWARF.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 "LogChannelDWARF.h"
11 
12 #include "lldb/Interpreter/Args.h"
13 #include "lldb/Core/PluginManager.h"
14 #include "lldb/Core/StreamFile.h"
15 #include "SymbolFileDWARF.h"
16 
17 using namespace lldb;
18 using namespace lldb_private;
19 
20 
21 // when the one and only logging channel is abled, then this will be non NULL.
22 static LogChannelDWARF* g_log_channel = NULL;
23 
24 LogChannelDWARF::LogChannelDWARF () :
25     LogChannel ()
26 {
27 }
28 
29 LogChannelDWARF::~LogChannelDWARF ()
30 {
31 }
32 
33 
34 void
35 LogChannelDWARF::Initialize()
36 {
37     PluginManager::RegisterPlugin (GetPluginNameStatic(),
38                                    GetPluginDescriptionStatic(),
39                                    LogChannelDWARF::CreateInstance);
40 }
41 
42 void
43 LogChannelDWARF::Terminate()
44 {
45     PluginManager::UnregisterPlugin (LogChannelDWARF::CreateInstance);
46 }
47 
48 LogChannel*
49 LogChannelDWARF::CreateInstance ()
50 {
51     return new LogChannelDWARF ();
52 }
53 
54 const char *
55 LogChannelDWARF::GetPluginNameStatic()
56 {
57     return SymbolFileDWARF::GetPluginNameStatic();
58 }
59 
60 const char *
61 LogChannelDWARF::GetPluginDescriptionStatic()
62 {
63     return "DWARF log channel for debugging plug-in issues.";
64 }
65 
66 const char *
67 LogChannelDWARF::GetPluginName()
68 {
69     return GetPluginDescriptionStatic();
70 }
71 
72 const char *
73 LogChannelDWARF::GetShortPluginName()
74 {
75     return GetPluginNameStatic();
76 }
77 
78 uint32_t
79 LogChannelDWARF::GetPluginVersion()
80 {
81     return 1;
82 }
83 
84 
85 void
86 LogChannelDWARF::Delete ()
87 {
88     g_log_channel = NULL;
89     m_log_sp.reset();
90 }
91 
92 
93 void
94 LogChannelDWARF::Disable (Args &categories, Stream *feedback_strm)
95 {
96     if (!m_log_sp)
97         return;
98 
99     g_log_channel = this;
100     uint32_t flag_bits = m_log_sp->GetMask().Get();
101     const size_t argc = categories.GetArgumentCount();
102     for (size_t i = 0; i < argc; ++i)
103     {
104          const char *arg = categories.GetArgumentAtIndex(i);
105 
106         if      (::strcasecmp (arg, "all")        == 0   ) flag_bits &= ~DWARF_LOG_ALL;
107         else if (::strcasecmp (arg, "info")       == 0   ) flag_bits &= ~DWARF_LOG_DEBUG_INFO;
108         else if (::strcasecmp (arg, "line")       == 0   ) flag_bits &= ~DWARF_LOG_DEBUG_LINE;
109         else if (::strcasecmp (arg, "pubnames")   == 0   ) flag_bits &= ~DWARF_LOG_DEBUG_PUBNAMES;
110         else if (::strcasecmp (arg, "pubtypes")   == 0   ) flag_bits &= ~DWARF_LOG_DEBUG_PUBTYPES;
111         else if (::strcasecmp (arg, "aranges")    == 0   ) flag_bits &= ~DWARF_LOG_DEBUG_ARANGES;
112         else if (::strcasecmp (arg, "default")    == 0   ) flag_bits &= ~DWARF_LOG_DEFAULT;
113         else
114         {
115             feedback_strm->Printf("error: unrecognized log category '%s'\n", arg);
116             ListCategories (feedback_strm);
117         }
118    }
119 
120     if (flag_bits == 0)
121         Delete ();
122     else
123         m_log_sp->GetMask().Reset (flag_bits);
124 
125     return;
126 }
127 
128 bool
129 LogChannelDWARF::Enable
130 (
131     StreamSP &log_stream_sp,
132     uint32_t log_options,
133     Stream *feedback_strm,  // Feedback stream for argument errors etc
134     const Args &categories  // The categories to enable within this logging stream, if empty, enable default set
135 )
136 {
137     Delete ();
138 
139     m_log_sp.reset(new Log (log_stream_sp));
140     g_log_channel = this;
141     uint32_t flag_bits = 0;
142     bool got_unknown_category = false;
143     const size_t argc = categories.GetArgumentCount();
144     for (size_t i=0; i<argc; ++i)
145     {
146         const char *arg = categories.GetArgumentAtIndex(i);
147 
148         if      (::strcasecmp (arg, "all")        == 0   ) flag_bits |= DWARF_LOG_ALL;
149         else if (::strcasecmp (arg, "info")       == 0   ) flag_bits |= DWARF_LOG_DEBUG_INFO;
150         else if (::strcasecmp (arg, "line")       == 0   ) flag_bits |= DWARF_LOG_DEBUG_LINE;
151         else if (::strcasecmp (arg, "pubnames")   == 0   ) flag_bits |= DWARF_LOG_DEBUG_PUBNAMES;
152         else if (::strcasecmp (arg, "pubtypes")   == 0   ) flag_bits |= DWARF_LOG_DEBUG_PUBTYPES;
153         else if (::strcasecmp (arg, "aranges")    == 0   ) flag_bits |= DWARF_LOG_DEBUG_ARANGES;
154         else if (::strcasecmp (arg, "default")    == 0   ) flag_bits |= DWARF_LOG_DEFAULT;
155         else
156         {
157             feedback_strm->Printf("error: unrecognized log category '%s'\n", arg);
158             if (got_unknown_category == false)
159             {
160                 got_unknown_category = true;
161                 ListCategories (feedback_strm);
162             }
163         }
164     }
165     if (flag_bits == 0)
166         flag_bits = DWARF_LOG_DEFAULT;
167     m_log_sp->GetMask().Reset(flag_bits);
168     m_log_sp->GetOptions().Reset(log_options);
169     return m_log_sp.get() != NULL;
170 }
171 
172 void
173 LogChannelDWARF::ListCategories (Stream *strm)
174 {
175     strm->Printf ("Logging categories for '%s':\n"
176                   "  all - turn on all available logging categories\n"
177                   "  info - log the parsing if .debug_info\n"
178                   "  line - log the parsing if .debug_line\n"
179                   "  pubnames - log the parsing if .debug_pubnames\n"
180                   "  pubtypes - log the parsing if .debug_pubtypes\n\n",
181                   SymbolFileDWARF::GetPluginNameStatic());
182 }
183 
184 Log *
185 LogChannelDWARF::GetLog ()
186 {
187     if (g_log_channel)
188         return g_log_channel->m_log_sp.get();
189     else
190         return NULL;
191 }
192 
193 Log *
194 LogChannelDWARF::GetLogIfAll (uint32_t mask)
195 {
196     Log *log = GetLog();
197     if (log)
198     {
199         if (log->GetMask().AllSet(mask))
200             return log;
201     }
202     return NULL;
203 }
204 
205 
206 void
207 LogChannelDWARF::LogIf (uint32_t mask, const char *format, ...)
208 {
209     if (g_log_channel)
210     {
211         LogSP log_sp(g_log_channel->m_log_sp);
212         va_list args;
213         va_start (args, format);
214         log_sp->VAPrintf (format, args);
215         va_end (args);
216     }
217 }
218