GNU Debugger (GDB): Difference between revisions
From mylearnings
Jump to navigationJump to search
Created page with "* Find start address and end address of a function <pre> info line <Function Name> </pre> * To view the instruction at a specific address. <pre> x/i <Address> </pre> * Print string pointed by a register. <pre> x/s $rdi </pre> * Disassemble a specific range of address. <pre> disass <start address> <end address> </pre>" |
No edit summary |
||
| Line 1: | Line 1: | ||
= Basic Commands = | |||
* Find start address and end address of a function | * Find start address and end address of a function | ||
<pre> | <pre> | ||
| Line 17: | Line 19: | ||
<pre> | <pre> | ||
disass <start address> <end address> | disass <start address> <end address> | ||
</pre> | |||
* Display the local variables | |||
<pre> | |||
info locals | |||
</pre> | |||
* Run GDB until the end of current function | |||
<pre> | |||
finish | |||
</pre> | |||
* Break out of a loop | |||
<pre> | |||
until | |||
</pre> | |||
* Get line number from address | |||
<pre> | |||
info symbol <address> | |||
</pre> | |||
= Watchpoints and Breakpoints | |||
* Stop when foo is modified | |||
<pre> | |||
gdb> watch foo | |||
</pre> | |||
* Watch location | |||
<pre> | |||
gdb> watch -l foo | |||
</pre> | |||
* Stop when foo is read | |||
<pre> | |||
gdb> rwatch foo | |||
</pre> | |||
* Stop when thread 3 modifies foo | |||
<pre> | |||
gdb> watch foo thread 3 | |||
</pre> | |||
* Stop when foo is > 10 | |||
<pre> | |||
gdb> watch foo if foo > 10 | |||
</pre> | |||
* Enable a break point. | |||
<pre> | |||
gdb> enable <comma separated break point numbers..> | |||
</pre> | |||
* Disable break points. | |||
<pre> | |||
gdb> disable <comma separated break point numbers..> | |||
</pre> | |||
* List all break points. | |||
<pre> | |||
gdb> info b | |||
</pre> | |||
= Debugging a multithreaded program = | |||
* List all the threads. | |||
<pre> | |||
gdb> info threads | |||
</pre> | </pre> | ||
Revision as of 15:18, 7 July 2025
Basic Commands
- Find start address and end address of a function
info line <Function Name>
- To view the instruction at a specific address.
x/i <Address>
- Print string pointed by a register.
x/s $rdi
- Disassemble a specific range of address.
disass <start address> <end address>
- Display the local variables
info locals
- Run GDB until the end of current function
finish
- Break out of a loop
until
- Get line number from address
info symbol <address>
= Watchpoints and Breakpoints
- Stop when foo is modified
gdb> watch foo
- Watch location
gdb> watch -l foo
- Stop when foo is read
gdb> rwatch foo
- Stop when thread 3 modifies foo
gdb> watch foo thread 3
- Stop when foo is > 10
gdb> watch foo if foo > 10
- Enable a break point.
gdb> enable <comma separated break point numbers..>
- Disable break points.
gdb> disable <comma separated break point numbers..>
- List all break points.
gdb> info b
Debugging a multithreaded program
- List all the threads.
gdb> info threads
