#include <config.h>
+#include "compiler.h"
+
/* Must be loaded before the following headers. */
#include "ldpreload.h"
-/* Should the "action" handler be invoked for this file descriptor? */
-static int check_handle_fd(int fd) {
- /* Load state from environment. Only necessary once per process. */
- if (!initialized) {
- init_from_environment();
- }
+/* See hookmacros.h for the decision if a function call is colored. */
- /* tracked_fds_find() is most likely faster than calling isatty(),
- * therefore check if we are tracking this file descriptor first. */
- if (!tracked_fds_find(fd)) {
- return 0;
- }
-
- /* Never touch anything not going to a terminal - unless we are explicitly
- * asked to do so. */
- if (force_write_to_non_tty) {
- return 1;
- }
+/* Prevent inlining into hook functions because it may increase the number of
+ * spilled registers unnecessarily. As it's not called very often accept the
+ * additional call. */
+static int isatty_noinline(int fd) noinline;
+static int isatty_noinline(int fd) {
int saved_errno = errno;
int result = isatty(fd);
errno = saved_errno;
return result;
}
+
static void dup_fd(int oldfd, int newfd) {
#ifdef DEBUG
debug("%3d -> %3d\t\t\t[%d]\n", oldfd, newfd, getpid());
#endif
- if (!initialized) {
+ if (unlikely(!initialized)) {
init_from_environment();
}
debug("%3d -> .\t\t\t[%d]\n", fd, getpid());
#endif
- if (!initialized) {
+ if (unlikely(!initialized)) {
init_from_environment();
}
/* Load alternative pre/post strings from the environment if available, fall
* back to default values. */
-inline static void init_pre_post_string(void) {
+static void init_pre_post_string(void) {
pre_string = getenv(ENV_NAME_PRE_STRING);
if (!pre_string) {
pre_string = DEFAULT_PRE_STRING;
post_string_size = strlen(post_string);
}
+/* Don't inline any of the pre/post functions. Keep the hook function as small
+ * as possible for speed reasons. */
+static void handle_fd_pre(int fd) noinline;
+static void handle_fd_post(int fd) noinline;
+static void handle_file_pre(FILE *stream) noinline;
+static void handle_file_post(FILE *stream) noinline;
+
static void handle_fd_pre(int fd) {
int saved_errno = errno;
- if (!pre_string || !post_string) {
+ if (unlikely(!pre_string || !post_string)) {
init_pre_post_string();
}
static void handle_file_pre(FILE *stream) {
int saved_errno = errno;
- if (!pre_string || !post_string) {
+ if (unlikely(!pre_string || !post_string)) {
init_pre_post_string();
}