#include <common/error.h>
#include <common/defaults.h>
+#include <common/macros.h>
+#include <common/utils.h>
#include "poll.h"
*/
if (events->nb_fd > events->alloc_size) {
/* Expand if the nb_fd is higher than the actual size. */
- new_size = events->alloc_size << 1UL;
+ new_size = max_t(uint32_t,
+ 1U << utils_get_count_order_u32(events->nb_fd),
+ events->alloc_size << 1UL);
} else if ((events->nb_fd << 1UL) <= events->alloc_size &&
events->nb_fd >= events->init_size) {
/* Shrink if nb_fd multiplied by two is <= than the actual size. */
- new_size = events->alloc_size >> 1UL;
+ new_size = max_t(uint32_t,
+ utils_get_count_order_u32(events->nb_fd) >> 1U,
+ events->alloc_size >> 1U);
} else {
/* Indicate that we don't want to resize. */
new_size = 0;
void compat_epoll_set_max_size(void)
{
int ret, fd;
+ ssize_t size_ret;
char buf[64];
poll_max_size = DEFAULT_POLL_SIZE;
return;
}
- ret = read(fd, buf, sizeof(buf));
- if (ret < 0) {
+ size_ret = lttng_read(fd, buf, sizeof(buf));
+ /*
+ * Allow reading a file smaller than buf, but keep space for
+ * final \0.
+ */
+ if (size_ret < 0 || size_ret >= sizeof(buf)) {
PERROR("read set max size");
goto error;
}
+ buf[size_ret] = '\0';
poll_max_size = atoi(buf);
if (poll_max_size == 0) {