Does the -attach option available when using offline mode?

[zhangqi zhu]

I want to record the instruction flow of the mysql service and do some analysis, but I find that the '/bin64/drrun -attach ${mysqld_pid} -t drcachesim --offline' does not work.

It seems the -attach cannot be used with --offline?

[Derek Bruening]

It does work, but not with the -t launcher (which normally replaces drrun) as that launcher has no attach support.  You have to specify the client directly.  E.g.:

bin64/drrun -attach $(pgrep xcalc) -c tools/lib64/release/libdrmemtrace.so -offline

On Fri, Dec 29, 2023 at 4:05 AM zhangqi zhu <zhuzhan...@gmail.com> wrote:

I want to record the instruction flow of the mysql service and do some analysis, but I find that the '/bin64/drrun -attach ${mysqld_pid} -t drcachesim --offline' does not work.

It seems the -attach cannot be used with --offline?

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[zhangqi zhu]

Thank you for your reply, it does work!

[Derek Bruening]

I filed https://github.com/DynamoRIO/dynamorio/issues/6550 on adding attach support to the drcachesim launcher, marked as help-wanted if someone is interested in working on that.