#include <sys/resource.h>
#include "test_send_signal_kern.skel.h"
-int sigusr1_received = 0;
+static int sigusr1_received;
static void sigusr1_handler(int signum)
{
- sigusr1_received++;
+ sigusr1_received = 1;
}
static void test_send_signal_common(struct perf_event_attr *attr,
if (pid == 0) {
int old_prio;
+ volatile int j = 0;
/* install signal handler and notify parent */
- signal(SIGUSR1, sigusr1_handler);
+ ASSERT_NEQ(signal(SIGUSR1, sigusr1_handler), SIG_ERR, "signal");
close(pipe_c2p[0]); /* close read */
close(pipe_p2c[1]); /* close write */
ASSERT_EQ(read(pipe_p2c[0], buf, 1), 1, "pipe_read");
/* wait a little for signal handler */
- sleep(1);
+ for (int i = 0; i < 100000000 && !sigusr1_received; i++)
+ j /= i + 1;
buf[0] = sigusr1_received ? '2' : '0';
+ ASSERT_EQ(sigusr1_received, 1, "sigusr1_received");
ASSERT_EQ(write(pipe_c2p[1], buf, 1), 1, "pipe_write");
/* wait for parent notification and exit */
goto destroy_skel;
}
} else {
- pmu_fd = syscall(__NR_perf_event_open, attr, pid, -1,
+ pmu_fd = syscall(__NR_perf_event_open, attr, pid, -1 /* cpu */,
-1 /* group id */, 0 /* flags */);
if (!ASSERT_GE(pmu_fd, 0, "perf_event_open")) {
err = -1;
ASSERT_EQ(read(pipe_c2p[0], buf, 1), 1, "pipe_read");
/* trigger the bpf send_signal */
- skel->bss->pid = pid;
- skel->bss->sig = SIGUSR1;
skel->bss->signal_thread = signal_thread;
+ skel->bss->sig = SIGUSR1;
+ skel->bss->pid = pid;
/* notify child that bpf program can send_signal now */
ASSERT_EQ(write(pipe_p2c[1], buf, 1), 1, "pipe_write");