diff options
| -rw-r--r-- | symlinks.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/symlinks.c b/symlinks.c index 1d6b35b858..cb255a3187 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; |