Song Liu wrote:
I am testing the patch set with the following code:
#include <stdio.h>
#include <unistd.h>
volatile short semaphore = 0;
int for_uprobe(int c)
{
printf("%d\n", c + 10);
return c + 1;
}
int main(int argc, char *argv[])
{
for_uprobe(argc);
while (1) {
sleep(1);
printf("semaphore %d\n", semaphore);
}
}
I created a uprobe on function for_uprobe(), that uses semaphore as
reference counter:
echo "p:uprobe_1 /root/a.out:0x49a(0x1036)" >> uprobe_events
Is that even valid? That _looks_ like a semaphore, but I'm not quite
sure that it qualifies as an _SDT_ semaphore. Do you see this issue if
you instead use the macros provided by <sys/sdt.h> to create SDT
markers?
- Naveen
