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software:gdb [2009/10/12 16:48]
cyril |
software:gdb [2013/09/19 16:40]
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| ====== GDB ====== | |
| ===== Cheat sheet ===== | |
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| ==== Starting ==== | |
| * **# ''gdb <prog-file>''** | |
| * **# ''gdb --args <prog-file> <prog-args...>''** : start gdb with program arguments | |
| * **# ''gdb <prog-file> <core-file>''** : inspect the core dump | |
| * **# ''gdb <prog-file> <pid>''** : attach to the running process | |
| |
| ==== Running ==== | |
| * **''run <prog-args...>''** (short "r") : start the program | |
| * **''step [count]''** (short "s") : step one line | |
| * **''stepi [count]''** (short "si") : step one instruction | |
| * **''next [count]''** (short "n") : step one line without entering in functions | |
| * **''continue''** (short "c") : continue the program | |
| * **''finish''** (short "fin") : execute until selected stack frame returns | |
| * **''advance [source-file]:<line>''** (short "adv") : continue up to the given location | |
| * **''call <func-name>''** (short "ca") : call a function (the context is copied so that it is not modified) | |
| * **''kill''** (short "k") : stop the program | |
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| ==== Navigating ==== | |
| * **''backtrace''** (short "bt") : show the stack | |
| * **''frame <frame-number>''** (short "f") : move to the stack drame number | |
| * **''list''**, **''list -''**, **''list [source-file]:<line|function>''** (short "l") : show source code | |
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| ==== Threads ==== | |
| * **''thread <thread-num>''** (short "t") : switch to thread | |
| * **''info threads''** (short "i th") : show list of current threads | |
| * **''thread apply all bt''** (short "t a a bt") : show backtraces of all threads | |
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| ==== Breakpoints ==== | |
| * **''break [source-file]:<line|function> [thread <thread-num>] [if <condition>]''** (short "b") : set a breakpoint | |
| * **''info breakpoints''** (short "i b") : show all current breakpoints | |
| * **''condition <breakpoint-number> <condition>''** (short "cond") : specify the breakpoint to break only if condition is true | |
| * **''delete breakpoints <breakpoint-number>''** (short "del b", "del") : delete a breakpoint | |
| * **''enable/disable <breakpoint-numbers...>''** (short "en" and "dis") : enable or disable some breakpoints | |
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| ==== Inspecting data ==== | |
| * **''print <var-name>''** (short "p") : print the value/content of the variable | |
| * **''print *<pointer>@<nelements>''** : print nelements of the array | |
| * **''print/<format> <var-name>''** : print with a certain format (x for hexa, ...) | |
| * **''display <var-name>''** (short "disp") : display the value/content of the variable at every step | |
| * **''awatch <var-name>''** (short "aw") : stops the execution whenever the variable is read or written | |
| * **''watch <cond-on-var>''** (short "wa") : stops the execution whenever the condition on the variable becomes true | |
| * **''ptype <var-name>''** : type of variable | |
| * **''x <addr>''** : print the content of memory, can format with /<format> too | |
| * **''set variable <var-name> = <value>''** : change variable value | |
| * **''set $variable = <exp>''** : create an external variable | |
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| ==== Automation ==== | |
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| * **''source <file-name>''** : load a set of commands from a file | |
| * You can define macros in ~/.gdbinit | |
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