Race detection in child processes

Question

Hi,
the program given below creates a child process with two threads accessing a shared variable. Unfortunately, Thread Analyzer does not detect the race (neither version 12.0 nor 12.3). The race is only detected if it occurs in the parent process. Option "-F on/all" to instrument child processes does not work in conjunction with option "-r all" (the collect tool emits the error message "
Race-detection data cannot be collected with any of -F -j -J -x"). Is this an inherent limitation of Thread Analyzer or is there a way to detect races and deadlocks in child processes?
Thank you very much in advance for your help.
Regards
#include <unistd.h>
#include <stdlib.h>
#include <assert.h>
#include <pthread.h>
int x;
void* fun(void*)
    x++;
    return NULL;
int main ()
    x = 0;
    int pid = fork();
    assert(pid >= 0);
    if (pid == 0)
        /* Child process */
        pthread_t thread;
        assert(pthread_create(&thread, NULL, fun, NULL) == 0);
        x++;
        assert(pthread_join(thread, NULL) == 0);
        _exit(0);
    else
        /* Parent process */
        sleep (1);
    return 0;

Answer 1

Just an update in case someone has seen this issue. The problem I am seeing is that some reports will spawn these child processes (that's how the appear in toad). At the DB level it is just another database process which shows up from v$session. I don't know how the application is calling to use as many processes as possible but this is what I am trying to limit on. If I run the same query in SQLPlus, only one process SID is created.