1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
|
//===-- DynamicLoaderMacOSXDYLD.h -------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#ifndef liblldb_DynamicLoaderMacOSXDYLD_h_
#define liblldb_DynamicLoaderMacOSXDYLD_h_
// C Includes
#include <mach-o/loader.h>
// C++ Includes
#include <map>
#include <vector>
#include <string>
// Other libraries and framework includes
#include "lldb/Target/DynamicLoader.h"
#include "lldb/Core/FileSpec.h"
#include "lldb/Core/UUID.h"
#include "lldb/Host/Mutex.h"
#include "lldb/Target/Process.h"
#include "ObjCTrampolineHandler.h"
class DynamicLoaderMacOSXDYLD : public lldb_private::DynamicLoader
{
public:
//------------------------------------------------------------------
// Static Functions
//------------------------------------------------------------------
static void
Initialize();
static void
Terminate();
static const char *
GetPluginNameStatic();
static const char *
GetPluginDescriptionStatic();
static lldb_private::DynamicLoader *
CreateInstance (lldb_private::Process *process);
DynamicLoaderMacOSXDYLD (lldb_private::Process *process);
virtual
~DynamicLoaderMacOSXDYLD ();
//------------------------------------------------------------------
/// Called after attaching a process.
///
/// Allow DynamicLoader plug-ins to execute some code after
/// attaching to a process.
//------------------------------------------------------------------
virtual void
DidAttach ();
virtual void
DidLaunch ();
//------------------------------------------------------------------
// Process::Notifications callback functions
//------------------------------------------------------------------
static void
Initialize (void *baton,
lldb_private::Process *process);
static void
ProcessStateChanged (void *baton,
lldb_private::Process *process,
lldb::StateType state);
virtual lldb::ThreadPlanSP
GetStepThroughTrampolinePlan (lldb_private::Thread &thread,
bool stop_others);
//------------------------------------------------------------------
// PluginInterface protocol
//------------------------------------------------------------------
virtual const char *
GetPluginName();
virtual const char *
GetShortPluginName();
virtual uint32_t
GetPluginVersion();
virtual void
GetPluginCommandHelp (const char *command, lldb_private::Stream *strm);
virtual lldb_private::Error
ExecutePluginCommand (lldb_private::Args &command, lldb_private::Stream *strm);
virtual lldb_private::Log *
EnablePluginLogging (lldb_private::Stream *strm, lldb_private::Args &command);
protected:
void
PrivateInitialize (lldb_private::Process *process);
void
PrivateProcessStateChanged (lldb_private::Process *process,
lldb::StateType state);
bool
LocateDYLD ();
bool
DidSetNotificationBreakpoint () const;
void
Clear (bool clear_process);
void
PutToLog (lldb_private::Log *log) const;
bool
ReadDYLDInfoFromMemoryAndSetNotificationCallback (lldb::addr_t addr);
uint32_t
UpdateAllImageInfos ();
static bool
NotifyBreakpointHit (void *baton,
lldb_private::StoppointCallbackContext *context,
lldb::user_id_t break_id,
lldb::user_id_t break_loc_id);
void
UpdateAllImageInfosHeaderAndLoadCommands ();
bool
UpdateCommPageLoadAddress (lldb_private::Module *module);
uint32_t
AddrByteSize()
{
switch (m_dyld.header.magic)
{
case MH_MAGIC:
case MH_CIGAM:
return 4;
case MH_MAGIC_64:
case MH_CIGAM_64:
return 8;
default:
break;
}
return 0;
}
static lldb::ByteOrder
GetByteOrderFromMagic (uint32_t magic)
{
switch (magic)
{
case MH_MAGIC:
case MH_MAGIC_64:
return lldb::eByteOrderHost;
case MH_CIGAM:
case MH_CIGAM_64:
if (lldb::eByteOrderHost == lldb::eByteOrderBig)
return lldb::eByteOrderLittle;
else
return lldb::eByteOrderBig;
default:
break;
}
return lldb::eByteOrderInvalid;
}
bool
ReadMachHeader (lldb::addr_t addr,
struct mach_header *header,
lldb_private::DataExtractor *load_command_data);
class Segment
{
public:
Segment() :
name(),
addr(LLDB_INVALID_ADDRESS),
size(0)
{
}
lldb_private::ConstString name;
lldb::addr_t addr;
lldb::addr_t size;
bool
operator==(const Segment& rhs) const
{
return name == rhs.name && addr == rhs.addr && size == rhs.size;
}
void
PutToLog (lldb_private::Log *log,
lldb::addr_t slide) const;
};
struct DYLDImageInfo
{
lldb::addr_t address; // Address of mach header for this dylib
lldb::addr_t slide; // The amount to slide all segments by if there is a global slide.
lldb::addr_t mod_date; // Modification date for this dylib
lldb_private::FileSpec file_spec; // Resolved path for this dylib
lldb_private::UUID uuid; // UUID for this dylib if it has one, else all zeros
struct mach_header header; // The mach header for this image
std::vector<Segment> segments; // All segment vmaddr and vmsize pairs for this executable (from memory of inferior)
DYLDImageInfo() :
address(LLDB_INVALID_ADDRESS),
slide(0),
mod_date(0),
file_spec(),
uuid(),
header(),
segments()
{
}
void
Clear(bool load_cmd_data_only)
{
if (!load_cmd_data_only)
{
address = LLDB_INVALID_ADDRESS;
slide = 0;
mod_date = 0;
file_spec.Clear();
::bzero (&header, sizeof(header));
}
uuid.Clear();
segments.clear();
}
bool
operator == (const DYLDImageInfo& rhs) const
{
return address == rhs.address
&& slide == rhs.slide
&& mod_date == rhs.mod_date
&& file_spec == rhs.file_spec
&& uuid == rhs.uuid
&& memcmp(&header, &rhs.header, sizeof(header)) == 0
&& segments == rhs.segments;
}
bool
UUIDValid() const
{
return uuid.IsValid();
}
const Segment *
FindSegment (const lldb_private::ConstString &name) const;
void
PutToLog (lldb_private::Log *log) const;
typedef std::vector<DYLDImageInfo> collection;
typedef collection::iterator iterator;
typedef collection::const_iterator const_iterator;
};
struct DYLDAllImageInfos
{
uint32_t version;
uint32_t dylib_info_count; // Version >= 1
lldb::addr_t dylib_info_addr; // Version >= 1
lldb::addr_t notification; // Version >= 1
bool processDetachedFromSharedRegion; // Version >= 1
bool libSystemInitialized; // Version >= 2
lldb::addr_t dyldImageLoadAddress; // Version >= 2
DYLDAllImageInfos() :
version (0),
dylib_info_count (0),
dylib_info_addr (LLDB_INVALID_ADDRESS),
notification (LLDB_INVALID_ADDRESS),
processDetachedFromSharedRegion (false),
libSystemInitialized (false),
dyldImageLoadAddress (LLDB_INVALID_ADDRESS)
{
}
void
Clear()
{
version = 0;
dylib_info_count = 0;
dylib_info_addr = LLDB_INVALID_ADDRESS;
notification = LLDB_INVALID_ADDRESS;
processDetachedFromSharedRegion = false;
libSystemInitialized = false;
dyldImageLoadAddress = LLDB_INVALID_ADDRESS;
}
bool
IsValid() const
{
return version >= 1 || version <= 6;
}
};
void
RegisterNotificationCallbacks();
void
UnregisterNotificationCallbacks();
uint32_t
ParseLoadCommands (const lldb_private::DataExtractor& data,
struct DYLDImageInfo& dylib_info,
lldb_private::FileSpec *lc_id_dylinker);
bool
UpdateImageLoadAddress(lldb_private::Module *module,
struct DYLDImageInfo& info);
bool
UnloadImageLoadAddress (lldb_private::Module *module,
struct DYLDImageInfo& info);
bool
NeedToLocateDYLD () const;
bool
SetNotificationBreakpoint ();
bool
ReadAllImageInfosStructure ();
DYLDImageInfo m_dyld; // Info about the curent dyld being used
lldb::addr_t m_dyld_all_image_infos_addr;
DYLDAllImageInfos m_dyld_all_image_infos;
lldb::user_id_t m_break_id;
DYLDImageInfo::collection m_dyld_image_infos; // Current shared libraries information
mutable lldb_private::Mutex m_mutex;
lldb_private::Process::Notifications m_notification_callbacks;
std::auto_ptr<lldb_private::ObjCTrampolineHandler> m_objc_trampoline_handler_ap;
private:
DISALLOW_COPY_AND_ASSIGN (DynamicLoaderMacOSXDYLD);
};
#endif // liblldb_DynamicLoaderMacOSXDYLD_h_
|