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| author | Francois-Xavier Le Bail <devel.fx.lebail@orange.fr> | 2023-02-17 15:28:22 +0100 |
|---|---|---|
| committer | Francois-Xavier Le Bail <devel.fx.lebail@orange.fr> | 2023-02-17 15:29:35 +0100 |
| commit | e5bd2dcf493a11f42967d094102567a46b9a66e7 (patch) | |
| tree | 9143b81358dcb245cc43a0b5ea9dcd93e117a506 | |
| parent | 6008cb83b72a8fafe9c69f6955f4bdffbc049a09 (diff) | |
| download | tcpdump-e5bd2dcf493a11f42967d094102567a46b9a66e7.tar.gz | |
instrument functions: Minimize stat() calls
This change decreases the execution time when the file indicating that
instrumentation is "off" exists.
[skip ci]
| -rw-r--r-- | instrument-functions.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/instrument-functions.c b/instrument-functions.c index a8e07d9d..fb2314dd 100644 --- a/instrument-functions.c +++ b/instrument-functions.c @@ -86,12 +86,19 @@ static void print_debug(void *this_fn, void *call_site, action_type action) static long symcount; static asection *text; static bfd_vma vma; + static int instrument_off; static int print_only_global; symbol_info syminfo; struct stat statbuf; int i; - if (!stat(ND_FILE_FLAG_OFF, &statbuf)) + if (!instrument_off) { + /* one-time test */ + if (!stat(ND_FILE_FLAG_OFF, &statbuf)) { + instrument_off = 1; + return; + } + } else return; /* If no errors, this block should be executed one time */ |