tool.drcov.eintr failing on ubuntu-20-arm64-sve about dynamorio HOT 4 CLOSED

2024-04-04T21:14:23.5132299Z 206:   DA:126,0

2024-04-04T21:14:25.4889115Z 206:   DA:126,1

124:     pthread_mutex_lock(&lock);
125:     while (!child_ready)
126:         pthread_cond_wait(&condvar, &lock); // <-- Is this line not executed for some reason?
127:     child_ready = false;
128:     pthread_mutex_unlock(&lock);

/*
 * test of restarted syscalls
 */

#include "tools.h"

#include <assert.h>
#include <stdio.h>
#include <string.h>
#include <signal.h>
#include <stdlib.h>
#include <pthread.h>

static pthread_cond_t condvar;
static bool child_ready;
static pthread_mutex_t lock;

static void
handler(int sig)
{
    print("in handler %d\n", sig);

    /* potentially unsafe but we risk it: we should be in our read syscall */
    pthread_mutex_lock(&lock);
    child_ready = true;
    pthread_cond_signal(&condvar);
    pthread_mutex_unlock(&lock);
}

/* snip */

int
main(int argc, char **argv)
{
    /* snip */

    /* test signal w/ handler */
    print("sending SIGUSR1\n");
    pthread_kill(thread, SIGUSR1);
                  /* <-- handler() is executed here, setting child_ready = true */
    pthread_mutex_lock(&lock);
    while (!child_ready) /* child_ready == true so the loop gets skipped */
        pthread_cond_wait(&condvar, &lock);
    child_ready = false;
    pthread_mutex_unlock(&lock);

    /* snip */

    return 0;
}