Dynamorio stop capture after executed execve

[Songyan Tang CN]

Hi all,

I static link dynamorio in my app and use like this:

dr_client_main(...) {

    dr_register_fork_init_event(...);

    drmgr_register_post_syscall_event(...);

}

my_app() {

dr_app_setup();

dr_app_start();

pid_t pid = fork(); // <--- fork_init_event could be triggered here

if (pid > 0) {

    // ...

} else {

    execve("launch.sh", ...); // <--- fork_init_event would not be triggered here

}

}

I hope I could capture all subprocess init event in launch.sh, but after run execve DR seems lose control of the process, the fork init event not triggered and in post syscall event I could not get SYS_execve event, but SYS_execve event could be get when execve failed. So maybe I mistook something?

[Derek Bruening]

DR that is statically linked into the application cannot follow across an execve as it has no mechanism for doing that: DR as a standalone binary is required for that.  A mixture could be used but is not currently supported.

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