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a2c6ec6c9b
BackgroundL Each log has a log_book: many logs can share the same one, as each one can have a separate prefix. Testing tickled a bug at the end of this series, where subd was logging to the peer's log_book on shutdown, but the peer was already freed. We've already had issues with logging while lightningd is shutting down. There are times when reference counting really is the right answer, this seems to be one of them: the 'struct log' share the 'struct log_book' and the last 'struct log' cleans it up. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
109 lines
3.6 KiB
C
109 lines
3.6 KiB
C
#ifndef LIGHTNING_LIGHTNINGD_LOG_H
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#define LIGHTNING_LIGHTNINGD_LOG_H
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#include "config.h"
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#include <ccan/tal/tal.h>
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#include <ccan/time/time.h>
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#include <ccan/typesafe_cb/typesafe_cb.h>
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#include <common/status.h>
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#include <common/type_to_string.h>
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#include <jsmn.h>
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#include <stdarg.h>
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struct json_result;
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struct lightningd;
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struct timerel;
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/* We can have a single log book, with multiple logs in it: it's freed by
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* the last struct log itself. */
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struct log_book *new_log_book(size_t max_mem,
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enum log_level printlevel);
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/* With different entry points */
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struct log *new_log(const tal_t *ctx, struct log_book *record, const char *fmt, ...) PRINTF_FMT(3,4);
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#define log_debug(log, ...) log_((log), LOG_DBG, __VA_ARGS__)
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#define log_info(log, ...) log_((log), LOG_INFORM, __VA_ARGS__)
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#define log_unusual(log, ...) log_((log), LOG_UNUSUAL, __VA_ARGS__)
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#define log_broken(log, ...) log_((log), LOG_BROKEN, __VA_ARGS__)
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void log_io(struct log *log, enum log_level dir, const char *comment,
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const void *data, size_t len);
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void log_(struct log *log, enum log_level level, const char *fmt, ...)
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PRINTF_FMT(3,4);
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void log_add(struct log *log, const char *fmt, ...) PRINTF_FMT(2,3);
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void logv(struct log *log, enum log_level level, const char *fmt, va_list ap);
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void logv_add(struct log *log, const char *fmt, va_list ap);
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enum log_level get_log_level(struct log_book *lr);
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void set_log_level(struct log_book *lr, enum log_level level);
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void set_log_prefix(struct log *log, const char *prefix);
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const char *log_prefix(const struct log *log);
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#define set_log_outfn(lr, print, arg) \
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set_log_outfn_((lr), \
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typesafe_cb_preargs(void, void *, (print), (arg),\
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const char *, \
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enum log_level, \
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bool, \
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const struct timeabs *, \
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const char *, \
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const u8 *), (arg))
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/* If level == LOG_IO_IN/LOG_IO_OUT, then io contains data */
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void set_log_outfn_(struct log_book *lr,
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void (*print)(const char *prefix,
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enum log_level level,
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bool continued,
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const struct timeabs *time,
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const char *str,
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const u8 *io,
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void *arg),
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void *arg);
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size_t log_max_mem(const struct log_book *lr);
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size_t log_used(const struct log_book *lr);
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const struct timeabs *log_init_time(const struct log_book *lr);
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#define log_each_line(lr, func, arg) \
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log_each_line_((lr), \
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typesafe_cb_preargs(void, void *, (func), (arg), \
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unsigned int, \
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struct timerel, \
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enum log_level, \
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const char *, \
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const char *, \
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const u8 *), (arg))
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void log_each_line_(const struct log_book *lr,
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void (*func)(unsigned int skipped,
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struct timerel time,
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enum log_level level,
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const char *prefix,
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const char *log,
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const u8 *io,
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void *arg),
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void *arg);
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void log_dump_to_file(int fd, const struct log_book *lr);
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void opt_register_logging(struct lightningd *ld);
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void crashlog_activate(const char *argv0, struct log *log);
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char *arg_log_to_file(const char *arg, struct lightningd *ld);
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/* Convenience parent for temporary allocations (eg. type_to_string)
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* during log calls; freed after every log_*() */
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const tal_t *ltmp;
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/* Before the crashlog is activated, just prints to stderr. */
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void NORETURN PRINTF_FMT(1,2) fatal(const char *fmt, ...);
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/* Adds an array showing log entries */
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void json_add_log(struct json_result *result, const char *fieldname,
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const struct log_book *lr, enum log_level minlevel);
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bool json_tok_loglevel(const char *buffer, const jsmntok_t *tok,
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enum log_level *level);
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#endif /* LIGHTNING_LIGHTNINGD_LOG_H */
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