On Thu, Oct 12, 2023 at 04:09:06PM +1100, David Gibson wrote:In log.c we use a macro to define logging functions for each of 4 priority levels. The only difference between these is the priority we pass to vsyslog() and similar functions. Because it's done as a macro, however, the entire functions code is included in the binary 4 times. Rearrange this to take the priority level as a parameter to a regular function, then just use macros to define trivial wrappers which pass the priority level. This saves about 600 bytes of text in the executable (x86, non-AVX2). Signed-off-by: David Gibson <david(a)gibson.dropbear.id.au>Superseded by a new series with a couple of extra patches.--- log.c | 65 +++++++++++++++++++++++++++-------------------------------- log.h | 12 +++++++---- 2 files changed, 38 insertions(+), 39 deletions(-) diff --git a/log.c b/log.c index c57bc8d..fd33f64 100644 --- a/log.c +++ b/log.c @@ -47,36 +47,36 @@ int log_to_stdout; /* Print to stdout instead of stderr */ #define BEFORE_DAEMON (setlogmask(0) == LOG_MASK(LOG_EMERG)) -#define logfn(name, level) \ -void name(const char *format, ...) { \ - FILE *out = log_to_stdout ? stdout : stderr; \ - struct timespec tp; \ - va_list args; \ - \ - if (setlogmask(0) & LOG_MASK(LOG_DEBUG) && log_file == -1) { \ - clock_gettime(CLOCK_REALTIME, &tp); \ - fprintf(out, "%lli.%04lli: ", \ - (long long int)tp.tv_sec - log_start, \ - (long long int)tp.tv_nsec / (100L * 1000)); \ - } \ - \ - if ((LOG_MASK(LOG_PRI(level)) & log_mask) || BEFORE_DAEMON) { \ - va_start(args, format); \ - if (log_file != -1) \ - logfile_write(level, format, args); \ - else if (!(setlogmask(0) & LOG_MASK(LOG_DEBUG))) \ - passt_vsyslog(level, format, args); \ - va_end(args); \ - } \ - \ - if ((setlogmask(0) & LOG_MASK(LOG_DEBUG) && log_file == -1) || \ - (BEFORE_DAEMON && !(log_opt & LOG_PERROR))) { \ - va_start(args, format); \ - (void)vfprintf(out, format, args); \ - va_end(args); \ - if (format[strlen(format)] != '\n') \ - fprintf(out, "\n"); \ - } \ +void logmsg(int pri, const char *format, ...) +{ + FILE *out = log_to_stdout ? stdout : stderr; + struct timespec tp; + va_list args; + + if (setlogmask(0) & LOG_MASK(LOG_DEBUG) && log_file == -1) { + clock_gettime(CLOCK_REALTIME, &tp); + fprintf(out, "%lli.%04lli: ", + (long long int)tp.tv_sec - log_start, + (long long int)tp.tv_nsec / (100L * 1000)); + } + + if ((LOG_MASK(LOG_PRI(pri)) & log_mask) || BEFORE_DAEMON) { + va_start(args, format); + if (log_file != -1) + logfile_write(pri, format, args); + else if (!(setlogmask(0) & LOG_MASK(LOG_DEBUG))) + passt_vsyslog(pri, format, args); + va_end(args); + } + + if ((setlogmask(0) & LOG_MASK(LOG_DEBUG) && log_file == -1) || + (BEFORE_DAEMON && !(log_opt & LOG_PERROR))) { + va_start(args, format); + (void)vfprintf(out, format, args); + va_end(args); + if (format[strlen(format)] != '\n') + fprintf(out, "\n"); + } } /* Prefixes for log file messages, indexed by priority */ @@ -89,11 +89,6 @@ const char *logfile_prefix[] = { " ", /* LOG_DEBUG */ }; -logfn(err, LOG_ERR) -logfn(warn, LOG_WARNING) -logfn(info, LOG_INFO) -logfn(debug,LOG_DEBUG) - /** * trace_init() - Set log_trace depending on trace (debug) mode * @enable: Tracing debug mode enabled if non-zero diff --git a/log.h b/log.h index a17171a..b4fb7e9 100644 --- a/log.h +++ b/log.h @@ -6,14 +6,18 @@ #ifndef LOG_H #define LOG_H +#include <syslog.h> + #define LOGFILE_SIZE_DEFAULT (1024 * 1024UL) #define LOGFILE_CUT_RATIO 30 /* When full, cut ~30% size */ #define LOGFILE_SIZE_MIN (5UL * MAX(BUFSIZ, PAGE_SIZE)) -void err(const char *format, ...); -void warn(const char *format, ...); -void info(const char *format, ...); -void debug(const char *format, ...); +void logmsg(int pri, const char *format, ...); + +#define err(...) logmsg(LOG_ERR, __VA_ARGS__) +#define warn(...) logmsg(LOG_WARNING, __VA_ARGS__) +#define info(...) logmsg(LOG_INFO, __VA_ARGS__) +#define debug(...) logmsg(LOG_DEBUG, __VA_ARGS__) #define die(...) \ do { \-- David Gibson | I'll have my music baroque, and my code david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_ | _way_ _around_! http://www.ozlabs.org/~dgibson