CODEWITHSUNDEEP
gdb
Kan Li
Kan Li

Reputation: 8797

gdb attach to a process without stop

Everytime I attach to a process using gdb, it will stop the target program, and I need to type 'cont' to let it go. Is there a way to attach to a process without stopping it? This makes things easier if the process will behave differently if it stops for a while.

Upvotes: 33

Views: 30498

Answers (4)

Wesley Haines
Wesley Haines

Reputation: 11

Here is a unified command for recent versions of GDB that include debuginfod support (also see a related question). Without this additional step, it was still hanging my remote terminal, which was hard to detect while I was attempting to debug a window-manager issue. In this example, <BINARY-NAME> is the process binary name, in case you don't know/don't want to find the PID.

echo 'set debuginfod enabled on' >> ~/.gdbinit
gdb -iex "set pagination off" -q -ex cont -p $(pidof <BINARY-NAME>)

Upvotes: 1

Dan
Dan

Reputation: 1162

For when you don't know the PID of the process...

gdb attach $(pgrep -f myApp) -ex cont

Upvotes: 3

QuantumBlack
QuantumBlack

Reputation: 1546

You can't make it not stop. You can however instantly continue... Create a simple batch script which will attach to a specific process and instantly continuing execution after attaching:

gdb attach $1 -x <(echo "cont")

./attach PID

Upvotes: 15

dashesy
dashesy

Reputation: 2643

I know there is already a fine answer for this, but I prefer not using an additional file.

Here is another answer:

gdb attach $(pidof process_name) -ex cont

Upvotes: 48

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