GDB
- clean up
| !cmd | !desc |
|---|---|
| !controlling execution | |
| r arg1 ... | run program |
| s | step through program |
| si | step one instruction exactly |
| c | continue running program |
| !breakpoints | |
| b funcname (or line) | set breakpoint at function |
| ! ... | |
| bt | backtrace |
| l | list surrounding source |
| info locals | show local variables |
| info args | show arguments |
| up/down n | go up or down n frames in the stack |
| disassemble | disassemble section of memory |
| p/x variable | print variable in hexadecimal |
| x addr | Examine memory at addr |
| show env | Show environment |
| set env FOO = bar | Set environment variable FOO to bar |
| whatis variable | show variable type |
| set var variable=value | Set variable to value |
| set env variable=value | Set environment variable to value |
| attach pid | Attach gdb to already running process |
| set print pretty on | pretty print structures |
| set print array on | readable array output |
| set print array-indexes on | show array indices |
| set print demangle on | demangle C++ names |
| info registers | show registers (excluding floating point) |
| macro expand macro | expands a macro (requires -gdwarf-2 -g3 compiler flags) |
| code | print type |
|---|---|
| x | hexadecimal |
| u | unsigned int |
| d | signed int |
Check a core dump
::
gdb executable coredump
Extensions