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Last active May 17, 2020 00:06
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GDB debug and performance cheat-sheet
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gdb.md

GDB

Attach to PID

rust-gdb binary pid

Take a core-dump of a running process

gcore pid

Change frame in backtrace

  • bt: prints all frames
  • frame <num>: switches to frame
  • info locals: prints variables in frame

Remove a breakpoint

  • info break: list breakpoints
  • del 3: delete breakpoint 3 or:
  • clear filename:linenum

Get backtrace of all threads

Inside GDB: thread apply all bt

Given a core-dump save the backtraces to a file: gdb binary coredump -ex "thread apply all bt" -ex "quit" > backtrace.log

Alternative with logging to file inside gdb:

(gdb) set logging on
(gdb) thread apply all bt
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