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Summary of GDB..…
Free Software
Free Software Needs free documentation
Contributors to gdB
3
1 A Sample GDB Session
2 Getting In and Out of GDB
11
2.1 Invoking gdB
2.1.1 Choosing Files
12
2.1.2 Choosing Modes..........
13
2.1.3 What GDB Does During Startup
16
2.2 Quitting GDB
17
3 Shell co
17
2. 4 Logging o
3 GDB Commands
申非
19
3.1 Command Syntax
3.2 Command Completion
3.3 Getting Help
着着·着鲁香垂,垂
22
4 Running Programs Under GDB
25
4.1 Compiling for Debugging
25
4.2 Starting your PrograM
,,26
4.3 Your Program's arguments
30
4.4 Your Programs Environment
30
4.5 Your Programs Working Directory
31
4.6 Your Program's Input and Output
32
4.7 Debugging an Alrcady-running Proccss
33
4.8 Killing the child process
34
4.9 Debugging Multiple Inferiors and Programs
34
4.10 Debugging Programs with Multiple Threads
37
4.11 Debugging Forks
42
4.12 Setting a Bookmark to Return to Later
.44
4.12.1 A Non-obvious Benefit of Using Checkp
OInts
Debugging with GDB
5 Stopping and Continuing
47
5. 1 Breakpoints, Watchpoints, and Calchpoinls
47
5.1.1 Setting Breakpoints
18
5.1.2 Setting Watchpoints
54
5.1.3 Setting Catchpoints
57
5.1. 4 Deleting Breakpoints
·;···.······
61
5.1.5 Disabling Breakpoints
62
5.1.6 Break Conditions
.63
5.1.7 Breakpoint Command Lists
65
5.1.8 Dynamic Printf
66
5.1.9 How to save breakpoints to a file
68
5.1.10 Static Probe Points
68
5.1.11 Cannot insert breakpoints
70
5.1.12“ Breakpoint address adjusted..”
70
5.2 Continuing and stepping
70
3 Skipping Over Functions and Files
74
5.4 Signals
∴..76
5.5 Stopping and Starting Multi-thread Programs
..80
5.5.1 All-Stop Mode.…
5.5. 2 Non-Stop Mode
81
5.5. 3 Background Execution
82
5.5.4 Thread-Specific Breakpoints............... 83
5.5.5 Interrupted Systeln calls
..84
5.5.6 Observer Mode
84
6 Running programs backward
87
7 Recording Inferiors Execution and Replaying
It
89
8 Examining the Stack
97
8.1 Stack frames
鲁鲁,
97
8.2 Backtraces
98
8.3 Selecting a frame
..100
8. 4 Information About a frame
102
8.5 Applying a Command to Several Frames
∴..104
8.6 Management of Frame Filters
..105
9 Examining Source Files
.109
9.1 Printing source lines
109
9.2 Specifying a Location
·
110
9.2.1 Linespec Locations
,,110
9.2.2 Explicit Locations..……,,111
9.2.3 Address locations
,,,112
9.3 Editing source files
113
9.3. 1 Choosing your Editor
113
9.1 Scarching sourcc files
114
9.5 Specifying Source Directories
·····
114
9. 6 Source and machine code
117
10卫 examining Data..
申·。·看D
123
10.1 Expressions
....125
10.2 Ambiguous Expressions
126
10.3 Program Varia bles
127
10.4 Artificial Array
130
10.5 Output Formats
130
10.6 Examining Memory
132
10.7 Automatic Display
..134
10.8 Print Settings
··,····
136
10.9 Pretty Printing
,144
10.9.1 Pretty-Printer Introduction
144
10.9.2 Pretty-Printer Example.......
.....144
10.9.3 Pretty-Printer Commands............... 145
10.10 Value Histol
116
10.11 Convenience Variables
..147
10.12 Convenience functions
..119
10.13 Registers
152
10.14 Floating point hardware.................. 154
10.15V
154
10.16 Opcrating System Auxiliary Information
154
10.17 Memory Region Attributes
156
10.17.1 Attributes
∴.,157
10.17.1 1 Memory Access Mode
157
10. 17.1.2 Memory Access Size
∴.157
10.17.1.3 Data Cache
158
10.17.2 Memory Access Checking
158
10.18 Copy Between Memory and a File
158
10. 19 How to Produce a Core File from Your Program...... 159
10.20 Character sets
.160
10.21 Caching Data of Targets.................. 163
10.22 Search Memor
...164
10.23 Value sizes
165
11 Debugging Optimized Code ........ 167
11.1 Inline functions
..167
11.2 Tail Call Frames
168
ugging with GDB
12 C Preprocessor Macros
171
13 Tracepoints
175
13.1 Commands to Set tracepoints
175
13.1.1 Create and Delete Tr
176
13. 1.2 Enable and Disable Tracepoints
178
13.1.3 Tracepoint Passcounts
178
13.1.4 Tracepoint Conditions
179
13.1.5 Trace State Variables
179
13.1.6 Tracepoint Action Lists
..180
13. 1.7 Listing Tracepoints
182
13.1. 8 Listing Static Tracepoint Markers
183
13.1.9 Starting and Stopping Trace Ex]
ts∴∴,184
13.1.10 Tracepoint restrictions
..,186
13.2 Using the Collected Dala.
∴,,187
13.2.1 tfind n.
∴,,,,,,,187
13.2.2 thump...
,189
13.2.3 save tracepoints filename
.190
13.3 Convenience Variables for Tracepoints
....190
13.4 USing Trace Files
191
14 Debugging Programs That Use Overlays
193
14.1 How Overlays Work
∴......193
14.2 Overlay Commands
194
14.3 Automatic Overlay Debugging
196
14.4 Overlay Sample program
197
15 Using GDB with Different Languages
199
15.1 Switching Bctwccn Sourcc Languages
.199
15.1.1 List of Filename Extensions and Languages....... 199
15.1.2 Setting the Working language
15.1.3 Having GDB Infer the Source Language
200
15.2 Displaying the language
∴..200
15.3 Type and Range Checking
01
15.3.1 An Overview of Type Checking............ 201
15.3.2 An Overview of Range Checking
202
15.4 Supported languages
03
15.4.1 C and c++
203
15.4.1.1 C and o++O
03
15.4.1.2 C and C++ Constants
∴.....,,205
15.4. 1.3 C++ Expressions
15.1.1.1C and C++ Defaults
207
15.4.1.5 C and C++ Type and range Checks
07
15.1.1. 6 GDB and c
207
15.4.1.7 GDB Features for c++
207
15.4.1.8 Decimal Floating Point format
209
15.4.2D
15.4.3Go.
∴.....209
15.4.4 Objective-C
.210
15.4.4.1 Method names in Commands
∴.....,210
15.4.4.2 The Print Command With Objective-C
....211
15.4.5 OpenCL C
211
15.4.5. 1 Open CL C Datatypes
,,,,,,,211
15.4.5.2 OpenCL C上 xpressIons.……,,,……,.2l1
15.4.5. 3 OpenCL C operators
15.4.6 Fortran
∴.211
15.4.6.1 Fortran Operators and expressions........212
15.4.6.2 Fortran Defaults
15.4.6.3 Special Fortran Commands
212
15.4.7 Pascal
212
15.4.8Rus
212
15.4.9 Modula-2
∴213
15.4.9.1 Operators
213
15.4.9.2 Built-in Functions and procedures
15.4.9.3 Constants
216
15.4.9. Modula-2 Types
.216
15.4.9.5 Modula-2 Defaults
218
15.4.9.6 Deviations from Standard Modula-2
218
15.4. 9.7 Modula-2 Type and Range Checks
15.498The
Operators
d
15.4.9.9 GDB and modula-2
15.4.10Ada..
申鲁·鲁
219
15.4.10.1 Introduction....,.......,,...... 219
15.4.10.2 Omissions from Ada
220
15.410.4 Over loading support for ada…,"、.
15.1.10.3 Addition
ns to ada
21
,,,,223
15.1.10.5 Stopping at the very Beginning
23
15.4.10.6 Ada Exceptions
223
15.4. 10.7 Extensions for Ada Tasks
224
15.4. 10.8 Tasking Support when Debugging Core Files..... 227
15.4.10.9 Tasking Support when using thc R
ar profile
........227
15.4.10.10 Ada sct
227
15.4.10.11 Known peculiarities of ada
e
228
15.5 Unsupported Languages
229
16 Examining the Symbol Table
..231
Debugging with GDB
17 Altering Execution
243
17.1 Assignment to Variables
243
17.2 Continuing at a Different Address
211
17. 3 Giving your Program a signal
...245
17.1 Returning from a Function
..216
17.5. 1 Calling functions with no debug inIo.,,,.,,......247
17.5 Calling Program Functions
248
17. 6 Patching programs
248
17.7 Compiling and injecting codc in GDB
17.7.1 Compilation options for the compile command..... 250
17.7.2 Caveats when using the compile command
∴..251
17.7.3 Compiler search for the compile command....... 253
1 8 GDB Files
.,,,,,,,255
18.1 CoMmands to Specily Files
255
18.2 File caching
…∴·..264
18.3 Debugging Information in Separate Files..........264
18.1 Debugging information in a special section
268
18.5 Index files speed Up gdB
,···
68
18.5.1 Automatic symbol index cache
..269
18.6 Errors Reading Symbol Files
270
18.7 GDB Data files
∴,271
Specifying a Debugging target
273
19.1 Active Targets
273
19.2 Commands for Managing targets
..,,27
19.3 Choosing Target Byte Order
276
20 Debugging Remote Programs
..277
20.1 Connecting to a Remote Target
∴..277
20.1.1 Types of Remote Connections
∴277
20.1.2 Host and Target files
278
20.1.3 Remote Connection Commands
279
20.2 Sending files to a remote system
282
20.3 USing the gdbserver Program
282
20.3.1 Running gdbserver
.283
20.3. 1.1 Attaching to a Running Program
...283
20.3. 1.2 TCP port allocation lifecycle of gdbserver
284
20.3. 1.3 Other Command-Line Arguments for gdbserver.. 284
20.3.2 Connecting to gdbserver
285
20.3. 3 Monitor Commands for gdbserver
20.3.4 Tracepoints support in gdbserver........... 286
20.4 Remote Configuration
87
20.5 Implementing a Remote Stub
..293
20.5.1 What the slub can Do for You
20.5.2 What You Must do for the stub
295
20.5. 3 Putting it All Together
296
VIl
21 Configuration-Specific Information
299
21.1 Native.....
..,.299
21.1.1 BSD libkvm Interface
299
21.1.2 Process information
299
21.1.3 Features for Debugging DjCPP Programs
301
21.1.4 Features for Debugging ms Windows Pe executables. 304
21.1.4.1 Support for DlLs without Debugging Symbols... 305
21.1.4.2 DLL Name prefixes
.306
21.1.4.3 Working with Minimal Symbols
∴..,,306
21. 1.5 Commands specific to GNU Hurd systems
.307
21.1.6 Darwin.……
.....,309
21.1. 7 FreeBSD
...310
21.2 Embedded Operating Systems
310
21.3 Embedded processors
......310
21.3. 1 Synopsys ArC
...310
21.3.2ARM.....
.311
21.3.3M68k.
312
21.3.4 Microblaze
..312
21.3.5 MIPS Embedded
313
21.3.6 OpenRIsc 1000
..313
21.3. 7 PowerPC embedded
313
21.3.8 Atmel AVR
,,314
21.3.9CRIS.
∴.315
21.3.10 Renesas Super-H
315
21.4 Architectures
21.4.1 AArch64.
316
21 4.1.1 AArch64 SVE
.,.316
21.4.2 x86 Architccturc-spccific Issues
∴...316
21.4.2. 1 Intel Memory Protection Extensions(MPX).... 316
21.4.3 Alpha
317
21.4.4MTPS
317
21.4.5HPPA.
319
21.4.6 Cell Broadband Engine sPu architecture
21.4.7 PowerPC
..320
21.4.8 NiOS Il
...320
21.4.9 Sparc64
321
21.4.9.1 ADI SU
.....321
21.4.10S12Z
..321
ugging with GDB
22 Controlling gDB
..323
22.1 Prompt
...·...··
.323
22.2 Command Editing
·
..323
22. 3 Command History
324
22.1 Screen size
..,,,,325
22.5 Output styling
326
22.6 Numbers
327
22.7 Configuring the Current abi
328
22.8 Automatically loading associatcd files
32
2.8.1 Automatically loading init file in the current directory. 331
2.8.2 Automatically loading thread debugging libr
331
22.8. 3 Security restriction for auto-loading
332
22.8.4 Displaying files tried fo
or auto-load
∴.334
22.9 Optional Warnings and Messages
.....334
22.10 Optional Messages about Internal happenings ....... 335
22.11 Other Miscellaneous Settings
340
23 Extending GDB
341
23.1 Canned Sequences of commands
∴,.341
23.1.1 User-defined commands
341
23.1.2 User-defined command hooks
23. 1.3 Command files
.344
23. 1.4 Commands for Controlled output
346
23. 1.5 Controlling auto-loading natiVe GDB scripts
347
23.2 Extending GDB using Python
348
23.2.1 Python Commands.................. 348
23.2.2 Python APi
349
23.2.2.1 Basic Python
..349
23.2.2.2 Exception Handling
...353
23.2.2.3 Values from Inferior
354
23.2.2.4 Tvpes In Python
359
23.2.2.5 Pretty Printing API
∴...363
23.2.2.6 Selecting Pretty-Printers
365
23.2.2.7 Writing a Pretty-Printer
...365
23.2.2.8 Type Printing API
鲁4
...368
23.2.2.9 Filtering Frames
..368
23.2.2.10 Decorating frames
371
23.2.2. 11 Writing a Fraine Filter
373
23.2.2.12 Unwinding Frames in Python
377
23.2.2. 13 Xmethods In Python.
380
23.2.2.14 Xmethod API
381
23.2.2. 15 Writing an Xmethod............... 382
23.2.2.16 Inferiors In Pith
385
23.2.2. 17 Events In Path
386
23.2.2.18 Thrcads In Python
390
23.2.2.19 Recordings In python
391
23.2.2.20 Commands In python
·
395
23.2.2.21 Parameters In Python
398
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