LLDB命令 以及相对应的GDB的命令

搞ios开发不学点debuger命令，有点说不过去。以下的表格罗列了LLDB命令 以及相对应的GDB的命令，并且列举了双方内置的兼容的命令别名。

执行类命令集

LLDBGDBLaunch a process no arguments.(lldb) process launch
(lldb) run
(lldb) r(gdb) run
(gdb) rLaunch a process with arguments <args>.(lldb) process launch — <args>
(lldb) r <args>(gdb) run <args>
(gdb) r <args>Launch a process for with arguments a.out 1 2 3 without having to supply the args every time.% lldb — a.out 1 2 3
(lldb) run
…
(lldb) run
…% gdb –args a.out 1 2 3
(gdb) run
…
(gdb) run
…Launch a process with arguments in new terminal window (Mac OS X only).(lldb) process launch –tty — <args>
(lldb) pro la -t — <args> Launch a process with arguments in existing terminal /dev/ttys006 (Mac OS X only).(lldb) process launch –tty=/dev/ttys006 — <args>
(lldb) pro la -t/dev/ttys006 — <args> Attach to a process with process ID 123.(lldb) process attach –pid 123
(lldb) attach -p 123(gdb) attach 123Attach to a process named “a.out”.(lldb) process attach –name a.out
(lldb) pro at -n a.out(gdb) attach a.outWait for a process named “a.out” to launch and attach.(lldb) process attach –name a.out –waitfor
(lldb) pro at -n a.out -w(gdb) attach -waitfor a.outDo a source level single step in the currently selected thread.(lldb) thread step-in
(lldb) step
(lldb) s(gdb) step
(gdb) sDo a source level single step over in the currently selected thread.(lldb) thread step-over
(lldb) next
(lldb) n(gdb) next
(gdb) nDo an instruction level single step in the currently selected thread.(lldb) thread step-inst
(lldb) si(gdb) stepi
(gdb) siDo an instruction level single step over in the currently selected thread.(lldb) thread step-inst-over
(lldb) ni(gdb) nexti
(gdb) niStep out of the currently selected frame.(lldb) thread step-out
(lldb) finish(gdb) finishBacktrace and disassemble every time you stop.(lldb) target stop-hook add
Enter your stop hook command(s). Type ‘DONE’ to end.
> bt
> disassemble –pc
> DONE
Stop hook #1 added.

 

断点类命令集

LLDBGDBSet a breakpoint at all functions named main.(lldb) breakpoint set –name main
(lldb) br s -n main
(lldb) b main(gdb) break mainSet a breakpoint in file test.c at line 12.(lldb) breakpoint set –file test.c –line 12
(lldb) br s -f test.c -l 12
(lldb) b test.c:12(gdb) break test.c:12Set a breakpoint at all C++ methods whose basename is main.(lldb) breakpoint set –method main
(lldb) br s -M main(gdb) break main
(Hope that there are no C funtions named main).Set a breakpoint at and object C function: -[NSString stringWithFormat:].(lldb) breakpoint set –name “-[NSString stringWithFormat:]”
(lldb) b -[NSString stringWithFormat:](gdb) break -[NSString stringWithFormat:]Set a breakpoint at all Objective C methods whose selector is count.(lldb) breakpoint set –selector count
(lldb) br s -S count(gdb) break count
(Hope that there are no C or C++ funtions namedcount).List all breakpoints.(lldb) breakpoint list
(lldb) br l(gdb) info breakDelete a breakpoint.(lldb) breakpoint delete 1
(lldb) br del 1(gdb) delete 1

 

监视点（WATCHPOINT）命令集

LLDBGDBSet a watchpoint on a variable when it is written to.(lldb) watchpoint set variable -w write global_var
(lldb) watch set var -w write global_var(gdb) watch global_varSet a watchpoint on a memory location when it is written into. The size of the region to watch for defaults to the pointer size if no ‘-x byte_size’ is specified. This command takes raw input, evaluated as an expression returning an unsigned integer pointing to the start of the region, after the ‘–’ option terminator.(lldb) watchpoint set expression -w write — my_ptr
(lldb) watch set exp -w write — my_ptr(gdb) watch -location g_char_ptrSet a condition on a watchpoint.(lldb) watch set var -w write global
(lldb) watchpoint modify -c ‘(global==5)’
(lldb) c
…
(lldb) bt
* thread #1: tid = 0x1c03, 0x0000000100000ef5 a.outmodify + 21 at main.cpp:16, stop reason = watchpoint 1
frame #0: 0x0000000100000ef5 a.outmodify + 21 at main.cpp:16
frame #1: 0x0000000100000eac a.outmain + 108 at main.cpp:25
frame #2: 0x00007fff8ac9c7e1 libdyld.dylibstart + 1
(lldb) frame var global
(int32_t) global = 5List all watchpoints.(lldb) watchpoint list
(lldb) watch l(gdb) info breakDelete a watchpoint.(lldb) watchpoint delete 1
(lldb) watch del 1(gdb) delete 1

 

检查变量

LLDBGDBShow the arguments and local variables for the current frame.(lldb) frame variable(gdb) info args
and
(gdb) info localsShow the local variables for the current frame.(lldb) frame variable –no-args
(lldb) fr v -a(gdb) info localsShow the contents of local variable “bar”.(lldb) frame variable bar
(lldb) fr v bar
(lldb) p bar(gdb) p barShow the contents of local variable “bar” formatted as hex.(lldb) frame variable –format x bar
(lldb) fr v -f x bar(gdb) p/x barShow the contents of global variable “baz”.(lldb) target variable baz
(lldb) ta v baz(gdb) p bazShow the global/static variables defined in the current source file.(lldb) target variable
(lldb) ta vn/aDisplay a the variable “argc” and “argv” every time you stop.(lldb) target stop-hook add –one-liner “frame variable argc argv”
(lldb) ta st a -o “fr v argc argv”
(lldb) display argc
(lldb) display argv(gdb) display argc
(gdb) display argvDisplay a the variable “argc” and “argv” only when you stop in the function named main.(lldb) target stop-hook add –name main –one-liner “frame variable argc argv”
(lldb) ta st a -n main -o “fr v argc argv”Display the variable “*this” only when you stop in c class named MyClass.(lldb) target stop-hook add –classname MyClass –one-liner “frame variable *this”
(lldb) ta st a -c MyClass -o “fr v *this”

 

检查线程状态

LLDBGDBShow the stack backtrace for the current thread.(lldb) thread backtrace
(lldb) bt(gdb) btShow the stack backtraces for all threads.(lldb) thread backtrace all
(lldb) bt all(gdb) thread apply all btSelect a different stack frame by index for the current thread.(lldb) frame select 12(gdb) frame 12List information about the currently selected frame in the current thread.(lldb) frame info Select the stack frame that called the current stack frame.(lldb) up
(lldb) frame select –relative=1(gdb) upSelect the stack frame that is called by the current stack frame.(lldb) down
(lldb) frame select –relative=-1
(lldb) fr s -r-1(gdb) downSelect a different stack frame using a relative offset.(lldb) frame select –relative 2
(lldb) fr s -r2 

(lldb) frame select –relative -3
(lldb) fr s -r-3

(gdb) up 2
(gdb) down 3Show the general purpose registers for the current thread.(lldb) register read(gdb) info registersShow the general purpose registers for the current thread formatted as signed decimal. LLDB tries to use the same format characters as printf(3) when possible. Type “help format” to see the full list of format specifiers.(lldb) register read –format i
(lldb) re r -f i 

LLDB now supports the GDB shorthand format syntax but there can’t be space after the command:
(lldb) register read/d

 Show all registers in all register sets for the current thread.(lldb) register read –all
(lldb) re r -a(gdb) info all-registersShow the values for the registers named “rax”, “rsp” and “rbp” in the current thread.(lldb) register read rax rsp rbp(gdb) info all-registers rax rsp rbpShow the values for the register named “rax” in the current thread formatted as binary.(lldb) register read –format binary rax
(lldb) re r -f b rax 

LLDB now supports the GDB shorthand format syntax but there can’t be space after the command:
(lldb) register read/t rax
(lldb) p/t $rax

(gdb) p/t $raxRead memory from address 0xbffff3c0 and show 4 hex uint32_t values.(lldb) memory read –size 4 –format x –count 4 0xbffff3c0
(lldb) me r -s4 -fx -c4 0xbffff3c0
(lldb) x -s4 -fx -c4 0xbffff3c0 

LLDB now supports the GDB shorthand format syntax but there can’t be space after the command:
(lldb) memory read/4xw 0xbffff3c0
(lldb) x/4xw 0xbffff3c0
(lldb) memory read –gdb-format 4xw 0xbffff3c0

(gdb) x/4xw 0xbffff3c0Read memory starting at the expression “argv[0]“.(lldb) memory read argv[0]
NOTE: any command can inline a scalar expression result (as long as the target is stopped) using backticks around any expression:
(lldb) memory read –size sizeof(int) argv[0](gdb) x argv[0]Read 512 bytes of memory from address 0xbffff3c0 and save results to a local file as text.(lldb) memory read –outfile /tmp/mem.txt –count 512 0xbffff3c0
(lldb) me r -o/tmp/mem.txt -c512 0xbffff3c0
(lldb) x/512bx -o/tmp/mem.txt 0xbffff3c0(gdb) set logging on
(gdb) set logging file /tmp/mem.txt
(gdb) x/512bx 0xbffff3c0
(gdb) set logging offSave binary memory data starting at 0×1000 and ending at 0×2000 to a file.(lldb) memory read –outfile /tmp/mem.bin –binary 0×1000 0×1200
(lldb) me r -o /tmp/mem.bin -b 0×1000 0×1200(gdb) dump memory /tmp/mem.bin 0×1000 0×2000Disassemble the current function for the current frame.(lldb) disassemble –frame
(lldb) di -f(gdb) disassembleDisassemble any functions named main.(lldb) disassemble –name main
(lldb) di -n main(gdb) disassemble mainDisassemble an address range.(lldb) disassemble –start-address 0x1eb8 –end-address 0x1ec3
(lldb) di -s 0x1eb8 -e 0x1ec3(gdb) disassemble 0x1eb8 0x1ec3Disassemble 20 instructions from a given address.(lldb) disassemble –start-address 0x1eb8 –count 20
(lldb) di -s 0x1eb8 -c 20(gdb) x/20i 0x1eb8Show mixed source and disassembly for the current function for the current frame.(lldb) disassemble –frame –mixed
(lldb) di -f -mn/aDisassemble the current function for the current frame and show the opcode bytes.(lldb) disassemble –frame –bytes
(lldb) di -f -bn/aDisassemble the current source line for the current frame.(lldb) disassemble –line
(lldb) di -ln/a

 

可执行文件和共享库查询命令

LLDBGDBList the main executable and all dependent shared libraries.(lldb) image list(gdb) info sharedLookup information for a raw address in the executable or any shared libraries.(lldb) image lookup –address 0x1ec4
(lldb) im loo -a 0x1ec4(gdb) info symbol 0x1ec4Lookup information for an address in a.out only.(lldb) image lookup –address 0x1ec4 a.out
(lldb) im loo -a 0x1ec4 a.out Lookup information for for a type Point by name.(lldb) image lookup –type Point
(lldb) im loo -t Point(lldb) ptype PointDump all sections from the main executable and any shared libraries.(lldb) image dump sections(gdb) maintenance info sectionsDump all sections in the a.out module.(lldb) image dump sections a.out Dump all symbols from the main executable and any shared libraries.(lldb) image dump symtab Dump all symbols in a.out and liba.so.(lldb) image dump symtab a.out liba.so 

 

杂项

LLDBGDBEcho text to the screen.(lldb) script print “Here is some text”(gdb) echo Here is some text\n

原文链接：http://www.appfanr.com/2012/07/lldb-to-gdb-command-map/