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lighttpd2/include/lighttpd/log.h

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#ifndef _LIGHTTPD_LOG_H_
#define _LIGHTTPD_LOG_H_
#ifndef _LIGHTTPD_BASE_H_
#error Please include <lighttpd/base.h> instead of this file
#endif
/*
* Logging uses a dedicated thread in order to prevent blocking write io from blocking normal operations in worker threads.
* Code handling vrequests should use the VR_ERROR(), VR_DEBUG() etc makros. Otherwise the ERROR(), DEBUG() etc makros should be used.
* Basic examples: VR_WARNING(vr, "%s", "something unexpected happened") ERROR(srv, "%d is not bigger than %d", 23, 42)
*
* Log targets specify where the log messages are written to. They are kept open for a certain amount of time (default 30s).
* file://
*
* Logs are sent once per ev_loop() iteration to the logging thread in order to reduce syscalls and lock contention.
*/
/* #include <lighttpd/valgrind/valgrind.h> */
/* at least one of srv and wrk must not be NULL. log_map may be NULL. */
#define _SEGFAULT(srv, wrk, log_map, fmt, ...) \
do { \
li_log_write(srv, NULL, NULL, LI_LOG_LEVEL_ABORT, LOG_FLAG_TIMESTAMP, "(crashing) %s.%d: "fmt, LI_REMOVE_PATH(__FILE__), __LINE__, __VA_ARGS__); \
/* VALGRIND_PRINTF_BACKTRACE(fmt, __VA_ARGS__); */\
abort();\
} while(0)
#define _ERROR(srv, wrk, ctx, fmt, ...) \
li_log_write(srv, wrk, ctx, LI_LOG_LEVEL_ERROR, LOG_FLAG_TIMESTAMP, "(error) %s.%d: "fmt, LI_REMOVE_PATH(__FILE__), __LINE__, __VA_ARGS__)
#define _WARNING(srv, wrk, ctx, fmt, ...) \
li_log_write(srv, wrk, ctx, LI_LOG_LEVEL_WARNING, LOG_FLAG_TIMESTAMP, "(warning) %s.%d: "fmt, LI_REMOVE_PATH(__FILE__), __LINE__, __VA_ARGS__)
#define _INFO(srv, wrk, ctx, fmt, ...) \
li_log_write(srv, wrk, ctx, LI_LOG_LEVEL_INFO, LOG_FLAG_TIMESTAMP, "(info) %s.%d: "fmt, LI_REMOVE_PATH(__FILE__), __LINE__, __VA_ARGS__)
#define _DEBUG(srv, wrk, ctx, fmt, ...) \
li_log_write(srv, wrk, ctx, LI_LOG_LEVEL_DEBUG, LOG_FLAG_TIMESTAMP, "(debug) %s.%d: "fmt, LI_REMOVE_PATH(__FILE__), __LINE__, __VA_ARGS__)
#define _BACKEND(srv, wrk, ctx, fmt, ...) \
li_log_write(srv, wrk, ctx, LI_LOG_LEVEL_BACKEND, LOG_FLAG_TIMESTAMP, fmt, __VA_ARGS__)
#define _BACKEND_LINES(srv, wrk, ctx, txt, fmt, ...) \
li_log_split_lines_(srv, wrk, ctx, LI_LOG_LEVEL_BACKEND, LOG_FLAG_TIMESTAMP, txt, fmt, __VA_ARGS__)
#define _GERROR(srv, wrk, ctx, error, fmt, ...) \
li_log_write(srv, wrk, ctx, LI_LOG_LEVEL_ERROR, LOG_FLAG_TIMESTAMP, "(error) %s.%d: " fmt "\n %s", LI_REMOVE_PATH(__FILE__), __LINE__, __VA_ARGS__, error ? error->message : "Empty GError")
#define VR_SEGFAULT(vr, fmt, ...) _SEGFAULT(vr->wrk->srv, vr->wrk, &vr->log_context, fmt, __VA_ARGS__)
#define VR_ERROR(vr, fmt, ...) _ERROR(vr->wrk->srv, vr->wrk, &vr->log_context, fmt, __VA_ARGS__)
#define VR_WARNING(vr, fmt, ...) _WARNING(vr->wrk->srv, vr->wrk, &vr->log_context, fmt, __VA_ARGS__)
#define VR_INFO(vr, fmt, ...) _INFO(vr->wrk->srv, vr->wrk, &vr->log_context, fmt, __VA_ARGS__)
#define VR_DEBUG(vr, fmt, ...) _DEBUG(vr->wrk->srv, vr->wrk, &vr->log_context, fmt, __VA_ARGS__)
#define VR_BACKEND(vr, fmt, ...) _BACKEND(vr->wrk->srv, vr->wrk, &vr->log_context, fmt, __VA_ARGS__)
#define VR_BACKEND_LINES(vr, txt, fmt, ...) _BACKEND_LINES(vr->wrk->srv, vr->wrk, &vr->log_context, txt, fmt, __VA_ARGS__)
#define VR_GERROR(vr, error, fmt, ...) _GERROR(vr->wrk->srv, vr->wrk, &vr->log_context, error, fmt, __VA_ARGS__)
/* vr may be NULL; if vr is NULL, srv must NOT be NULL */
#define _VR_SEGFAULT(srv, vr, fmt, ...) _SEGFAULT(srv, NULL != vr ? vr->wrk : NULL, &vr->log_context, fmt, __VA_ARGS__)
#define _VR_ERROR(srv, vr, fmt, ...) _ERROR(srv, NULL != vr ? vr->wrk : NULL, &vr->log_context, fmt, __VA_ARGS__)
#define _VR_WARNING(srv, vr, fmt, ...) _WARNING(srv, NULL != vr ? vr->wrk : NULL, &vr->log_context, fmt, __VA_ARGS__)
#define _VR_INFO(srv, vr, fmt, ...) _INFO(srv, NULL != vr ? vr->wrk : NULL, &vr->log_context, fmt, __VA_ARGS__)
#define _VR_DEBUG(srv, vr, fmt, ...) _DEBUG(srv, NULL != vr ? vr->wrk : NULL, &vr->log_context, fmt, __VA_ARGS__)
#define _VR_BACKEND(srv, vr, fmt, ...) _BACKEND(srv, NULL != vr ? vr->wrk : NULL, &vr->log_context, fmt, __VA_ARGS__)
#define _VR_BACKEND_LINES(srv, vr, txt, fmt, ...) _BACKEND_LINES(srv, NULL != vr ? vr->wrk : NULL, &vr->log_context, txt, fmt, __VA_ARGS__)
#define _VR_GERROR(srv, vr, error, fmt, ...) _GERROR(srv, NULL != vr ? vr->wrk : NULL, &vr->log_context, error, fmt, __VA_ARGS__)
#define SEGFAULT(srv, fmt, ...) _SEGFAULT(srv, NULL, NULL, fmt, __VA_ARGS__)
#define ERROR(srv, fmt, ...) _ERROR(srv, NULL, NULL, fmt, __VA_ARGS__)
#define WARNING(srv, fmt, ...) _WARNING(srv, NULL, NULL, fmt, __VA_ARGS__)
#define INFO(srv, fmt, ...) _INFO(srv, NULL, NULL, fmt, __VA_ARGS__)
#define DEBUG(srv, fmt, ...) _DEBUG(srv, NULL, NULL, fmt, __VA_ARGS__)
#define BACKEND(srv, fmt, ...) _BACKEND(srv, NULL, NULL, fmt, __VA_ARGS__)
#define GERROR(srv, error, fmt, ...) _GERROR(srv, NULL, NULL, error, fmt, __VA_ARGS__)
/* flags for li_log_write */
#define LOG_FLAG_NONE (0x0) /* default flag */
#define LOG_FLAG_TIMESTAMP (0x1) /* prepend a timestamp to the log message */
#define LOG_FLAG_NOLOCK (0x1 << 1) /* for internal use only */
/* embed this into structures that should have their own log context, like liVRequest and liServer.logs */
struct liLogContext {
liLogMap *log_map;
};
struct liLogTarget {
liLogType type;
GString *path;
gint fd;
liWaitQueueElem wqelem;
};
struct liLogEntry {
GString *path;
liLogLevel level;
guint flags;
GString *msg;
GList queue_link;
};
struct liLogServerData {
struct ev_loop *loop;
ev_async watcher;
liRadixTree *targets; /** const gchar* path => (liLog*) */
liWaitQueue close_queue;
GQueue write_queue;
GStaticMutex write_queue_mutex;
GThread *thread;
gboolean thread_alive;
gboolean thread_finish;
gboolean thread_stop;
/* timestamp format cache */
struct {
ev_tstamp last_ts;
GString *format;
GString *cached;
} timestamp;
liLogContext log_context;
};
struct liLogWorkerData {
GQueue log_queue;
};
struct liLogMap {
int refcount;
GString* targets[LI_LOG_LEVEL_COUNT];
};
/* determines the type of a log target by the path given. /absolute/path = file; |app = pipe; stderr = stderr; syslog = syslog;
* returns the begin of the parameter string in *param if param != NULL (filename for /absolute/path or file:///absolute/path)
* *param is either NULL or points into the path string!
*/
LI_API liLogType li_log_type_from_path(GString *path, gchar **param);
/* returns -1 for invalid names */
LI_API int li_log_level_from_string(GString *str);
LI_API gchar* li_log_level_str(liLogLevel log_level);
/* log_new is used to create a new log target, if a log with the same path already exists, it is referenced instead */
LI_API liLogTarget *li_log_new(liServer *srv, liLogType type, GString *path);
LI_API void li_log_thread_start(liServer *srv);
LI_API void li_log_thread_wakeup(liServer *srv);
LI_API void li_log_thread_stop(liServer *srv);
LI_API void li_log_thread_finish(liServer *srv);
LI_API void li_log_init(liServer *srv);
LI_API void li_log_cleanup(liServer *srv);
LI_API liLogMap* li_log_map_new(void);
LI_API liLogMap* li_log_map_new_default(void);
LI_API void li_log_map_acquire(liLogMap *log_map);
LI_API void li_log_map_release(liLogMap *log_map);
LI_API void li_log_context_set(liLogContext *context, liLogMap *log_map);
LI_API gboolean li_log_write_direct(liServer *srv, liWorker *wrk, GString *path, GString *msg);
/* li_log_write is used to write to the errorlog */
LI_API gboolean li_log_write(liServer *srv, liWorker *wrk, liLogContext* context, liLogLevel log_level, guint flags, const gchar *fmt, ...) G_GNUC_PRINTF(6, 7);
/* replaces '\r' and '\n' with '\0' */
LI_API void li_log_split_lines(liServer *srv, liWorker *wrk, liLogContext* context, liLogLevel log_level, guint flags, gchar *txt, const gchar *prefix);
LI_API void li_log_split_lines_(liServer *srv, liWorker *wrk, liLogContext* context, liLogLevel log_level, guint flags, gchar *txt, const gchar *fmt, ...) G_GNUC_PRINTF(7, 8);
#endif
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