summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
-rw-r--r--symlinks.c23
1 files changed, 23 insertions, 0 deletions
diff --git a/symlinks.c b/symlinks.c
index 1d6b35b..cb255a3 100644
--- a/symlinks.c
+++ b/symlinks.c
@@ -51,6 +51,11 @@ static inline void reset_lstat_cache(void)
*/
}
+#define SWITCHES_BEFORE_WARNING 10
+static unsigned int cache_switches, number_of_warnings;
+static unsigned int current_cache_func, last_cache_func;
+static unsigned int total_calls;
+
#define FL_DIR (1 << 0)
#define FL_NOENT (1 << 1)
#define FL_SYMLINK (1 << 2)
@@ -77,6 +82,7 @@ static int lstat_cache(const char *name, int len,
int match_flags, ret_flags, save_flags, max_len, ret;
struct stat st;
+ total_calls++;
if (cache.track_flags != track_flags ||
cache.prefix_len_stat_func != prefix_len_stat_func) {
/*
@@ -88,6 +94,17 @@ static int lstat_cache(const char *name, int len,
cache.track_flags = track_flags;
cache.prefix_len_stat_func = prefix_len_stat_func;
match_len = last_slash = 0;
+ cache_switches++;
+ if (cache_switches > SWITCHES_BEFORE_WARNING) {
+ if (number_of_warnings < 10 || number_of_warnings % 1000 == 0)
+ printf("warning from %s:%d cache_switches:%u > %u "\
+ "(current:%u last:%u total:%u)\n",
+ __FILE__, __LINE__,
+ cache_switches, SWITCHES_BEFORE_WARNING,
+ current_cache_func, last_cache_func,
+ total_calls);
+ number_of_warnings++;
+ }
} else {
/*
* Check to see if we have a match from the cache for
@@ -216,6 +233,8 @@ void clear_lstat_cache(void)
*/
int has_symlink_leading_path(const char *name, int len)
{
+ last_cache_func = current_cache_func;
+ current_cache_func = 1;
return lstat_cache(name, len,
FL_SYMLINK|FL_DIR, USE_ONLY_LSTAT) &
FL_SYMLINK;
@@ -227,6 +246,8 @@ int has_symlink_leading_path(const char *name, int len)
*/
int has_symlink_or_noent_leading_path(const char *name, int len)
{
+ last_cache_func = current_cache_func;
+ current_cache_func = 2;
return lstat_cache(name, len,
FL_SYMLINK|FL_NOENT|FL_DIR, USE_ONLY_LSTAT) &
(FL_SYMLINK|FL_NOENT);
@@ -241,6 +262,8 @@ int has_symlink_or_noent_leading_path(const char *name, int len)
*/
int has_dirs_only_path(const char *name, int len, int prefix_len)
{
+ last_cache_func = current_cache_func;
+ current_cache_func = 3;
return lstat_cache(name, len,
FL_DIR|FL_FULLPATH, prefix_len) &
FL_DIR;