Why can't WIFSIGNALED (status) detect signals when tracking a process using ptrace?

Question

I use ptrace to track the child process. It works fine when the child process exits normally. But if it exits abnormally, the program enters an endless loop, despite using the WIFSIGNALED (& status) macro. Here is an example of a child process:

try.c

int main()
   {
      int a=5/0;
   }

And here is the trace program

#include <sys/ptrace.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
#include <sys/user.h>
#include <sys/syscall.h>   /* For SYS_write etc */
#include <sys/reg.h>
#include <signal.h>
int main()
{   
    pid_t child;
    long orig_eax, eax;
    int status,insyscall = 0;
    child = fork();
    if(child == 0)
    {
            ptrace(PTRACE_TRACEME, 0, NULL, NULL);
            execl("./try", "try", NULL);
    }
    else
    {
        siginfo_t sig;
        memset(&sig,0,sizeof(siginfo_t));
        while(1)
        {
            wait(&status);
            if(WIFSIGNALED(status))
            {
                printf("Exiting due to signal\n");
                exit(0);
            }
            if(WIFEXITED(status))
                break;
            orig_eax = ptrace(PTRACE_PEEKUSER,child, 4 * ORIG_EAX, NULL);
            printf("system call number=%ld\n",orig_eax);
            if(insyscall == 0)
            {
                      /* Syscall entry */
                      insyscall = 1;
                      printf("In sys call\n");
            }
            else 
            {
               /* Syscall exit */
                 eax = ptrace(PTRACE_PEEKUSER,child, 4 * EAX, NULL);
                 printf("System call returned with %ld\n", eax);
                 insyscall = 0;
             }
            ptrace(PTRACE_SYSCALL,child, NULL, NULL);
        }
    }
    return 0;
}

Why is there no signal detected that works otherwise when the ptrace function is not used?

Answer 1

ptrace , . - . , . PTRACE_CONT, , .

? , Ptrace . , SIGSEGV, seg- , .