Hi folks,
The git testsuite is currently failing. I started to investigate and I
created this simplification program.
===
#include <stdio.h>
#include <pthread.h>
void *func(void * a) {
// printf("start\n");
// fflush(stdout);
for (int i = 0; i < 9; i++) {
printf("out: %i\n", i);
//printf("out\n");
fflush(stdout);
}
}
int main() {
pthread_t a[9];
for (int i = 0; i < 9; i++) {
pthread_create(&a[i], NULL, func, NULL);
}
for (int i = 0; i < 9; i++) {
pthread_join(a[i], NULL);
}
return 0;
}
===
Basically this program should output 81 lines (9 threads printing 9 lines),
but it actually print less. (I usually do `./a.out | wc -l`)
But, if you replace the print by a print with no argos (the commented one),
the program behave correctly.
And if instead you uncomment the print("start\") + fflush, it also behave
correctly (print 90 lines, 81 from the loop + 9 start).
My problem, is that I’m not able to investigate (I don’t know enoguh the
Glibc structure) and GDB seems to have a bug (break `func` + run end up
with SIGILL).
Etienne
