frida inject can't properly handle a program that is in the STOP state, even if the program resumes after injection.

[nj00001]

Check out the code example below

#include <stdio.h>
#include <unistd.h>
#include <signal.h>
#include <string.h>
#include <errno.h>

int main(){

    

    pid_t pid = getpid();

    printf("entry %d\n", pid);

    kill(pid, SIGSTOP);

    printf("leave\n");

}

When a process receives a SIGSTOP signal, it enters a suspended state, and if you use frida to inject into the process, the js code injected into the process does not seem to be executed.
If you add a sleep function to the end of the above code, then you will receive
Unexpectedly timed out while waiting for signal from process with PID 23551