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Edit File: elog.h

/*------------------------------------------------------------------------- * * elog.h * POSTGRES error reporting/logging definitions. * * * Portions Copyright (c) 1996-2012, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * * src/include/utils/elog.h * *------------------------------------------------------------------------- */ #ifndef ELOG_H #define ELOG_H #include <setjmp.h> /* Error level codes */ #define DEBUG5 10 /* Debugging messages, in categories of * decreasing detail. */ #define DEBUG4 11 #define DEBUG3 12 #define DEBUG2 13 #define DEBUG1 14 /* used by GUC debug_* variables */ #define LOG 15 /* Server operational messages; sent only to * server log by default. */ #define COMMERROR 16 /* Client communication problems; same as LOG * for server reporting, but never sent to * client. */ #define INFO 17 /* Messages specifically requested by user (eg * VACUUM VERBOSE output); always sent to * client regardless of client_min_messages, * but by default not sent to server log. */ #define NOTICE 18 /* Helpful messages to users about query * operation; sent to client and server log by * default. */ #define WARNING 19 /* Warnings. NOTICE is for expected messages * like implicit sequence creation by SERIAL. * WARNING is for unexpected messages. */ #define ERROR 20 /* user error - abort transaction; return to * known state */ /* Save ERROR value in PGERROR so it can be restored when Win32 includes * modify it. We have to use a constant rather than ERROR because macros * are expanded only when referenced outside macros. */ #ifdef WIN32 #define PGERROR 20 #endif #define FATAL 21 /* fatal error - abort process */ #define PANIC 22 /* take down the other backends with me */ /* #define DEBUG DEBUG1 */ /* Backward compatibility with pre-7.3 */ /* macros for representing SQLSTATE strings compactly */ #define PGSIXBIT(ch) (((ch) - '0') & 0x3F) #define PGUNSIXBIT(val) (((val) & 0x3F) + '0') #define MAKE_SQLSTATE(ch1,ch2,ch3,ch4,ch5) \ (PGSIXBIT(ch1) + (PGSIXBIT(ch2) << 6) + (PGSIXBIT(ch3) << 12) + \ (PGSIXBIT(ch4) << 18) + (PGSIXBIT(ch5) << 24)) /* These macros depend on the fact that '0' becomes a zero in SIXBIT */ #define ERRCODE_TO_CATEGORY(ec) ((ec) & ((1 << 12) - 1)) #define ERRCODE_IS_CATEGORY(ec) (((ec) & ~((1 << 12) - 1)) == 0) /* SQLSTATE codes for errors are defined in a separate file */ #include "utils/errcodes.h" /* Which __func__ symbol do we have, if any? */ #ifdef HAVE_FUNCNAME__FUNC #define PG_FUNCNAME_MACRO __func__ #else #ifdef HAVE_FUNCNAME__FUNCTION #define PG_FUNCNAME_MACRO __FUNCTION__ #else #define PG_FUNCNAME_MACRO NULL #endif #endif /*---------- * New-style error reporting API: to be used in this way: * ereport(ERROR, * (errcode(ERRCODE_UNDEFINED_CURSOR), * errmsg("portal \"%s\" not found", stmt->portalname), * ... other errxxx() fields as needed ...)); * * The error level is required, and so is a primary error message (errmsg * or errmsg_internal). All else is optional. errcode() defaults to * ERRCODE_INTERNAL_ERROR if elevel is ERROR or more, ERRCODE_WARNING * if elevel is WARNING, or ERRCODE_SUCCESSFUL_COMPLETION if elevel is * NOTICE or below. * * ereport_domain() allows a message domain to be specified, for modules that * wish to use a different message catalog from the backend's. To avoid having * one copy of the default text domain per .o file, we define it as NULL here * and have errstart insert the default text domain. Modules can either use * ereport_domain() directly, or preferably they can override the TEXTDOMAIN * macro. *---------- */ #define ereport_domain(elevel, domain, rest) \ (errstart(elevel, __FILE__, __LINE__, PG_FUNCNAME_MACRO, domain) ? \ (errfinish rest) : (void) 0) #define ereport(elevel, rest) \ ereport_domain(elevel, TEXTDOMAIN, rest) #define TEXTDOMAIN NULL extern bool errstart(int elevel, const char *filename, int lineno, const char *funcname, const char *domain); extern void errfinish(int dummy,...); extern int errcode(int sqlerrcode); extern int errcode_for_file_access(void); extern int errcode_for_socket_access(void); extern int errmsg(const char *fmt,...) /* This extension allows gcc to check the format string for consistency with the supplied arguments. */ __attribute__((format(PG_PRINTF_ATTRIBUTE, 1, 2))); extern int errmsg_internal(const char *fmt,...) /* This extension allows gcc to check the format string for consistency with the supplied arguments. */ __attribute__((format(PG_PRINTF_ATTRIBUTE, 1, 2))); extern int errmsg_plural(const char *fmt_singular, const char *fmt_plural, unsigned long n,...) /* This extension allows gcc to check the format string for consistency with the supplied arguments. */ __attribute__((format(PG_PRINTF_ATTRIBUTE, 1, 4))) __attribute__((format(PG_PRINTF_ATTRIBUTE, 2, 4))); extern int errdetail(const char *fmt,...) /* This extension allows gcc to check the format string for consistency with the supplied arguments. */ __attribute__((format(PG_PRINTF_ATTRIBUTE, 1, 2))); extern int errdetail_internal(const char *fmt,...) /* This extension allows gcc to check the format string for consistency with the supplied arguments. */ __attribute__((format(PG_PRINTF_ATTRIBUTE, 1, 2))); extern int errdetail_log(const char *fmt,...) /* This extension allows gcc to check the format string for consistency with the supplied arguments. */ __attribute__((format(PG_PRINTF_ATTRIBUTE, 1, 2))); extern int errdetail_plural(const char *fmt_singular, const char *fmt_plural, unsigned long n,...) /* This extension allows gcc to check the format string for consistency with the supplied arguments. */ __attribute__((format(PG_PRINTF_ATTRIBUTE, 1, 4))) __attribute__((format(PG_PRINTF_ATTRIBUTE, 2, 4))); extern int errhint(const char *fmt,...) /* This extension allows gcc to check the format string for consistency with the supplied arguments. */ __attribute__((format(PG_PRINTF_ATTRIBUTE, 1, 2))); extern int errcontext(const char *fmt,...) /* This extension allows gcc to check the format string for consistency with the supplied arguments. */ __attribute__((format(PG_PRINTF_ATTRIBUTE, 1, 2))); extern int errhidestmt(bool hide_stmt); extern int errfunction(const char *funcname); extern int errposition(int cursorpos); extern int internalerrposition(int cursorpos); extern int internalerrquery(const char *query); extern int geterrcode(void); extern int geterrposition(void); extern int getinternalerrposition(void); /*---------- * Old-style error reporting API: to be used in this way: * elog(ERROR, "portal \"%s\" not found", stmt->portalname); *---------- */ #define elog elog_start(__FILE__, __LINE__, PG_FUNCNAME_MACRO), elog_finish extern void elog_start(const char *filename, int lineno, const char *funcname); extern void elog_finish(int elevel, const char *fmt,...) /* This extension allows gcc to check the format string for consistency with the supplied arguments. */ __attribute__((format(PG_PRINTF_ATTRIBUTE, 2, 3))); /* Support for constructing error strings separately from ereport() calls */ extern void pre_format_elog_string(int errnumber, const char *domain); extern char * format_elog_string(const char *fmt,...) /* This extension allows gcc to check the format string for consistency with the supplied arguments. */ __attribute__((format(PG_PRINTF_ATTRIBUTE, 1, 2))); /* Support for attaching context information to error reports */ typedef struct ErrorContextCallback { struct ErrorContextCallback *previous; void (*callback) (void *arg); void *arg; } ErrorContextCallback; extern PGDLLIMPORT ErrorContextCallback *error_context_stack; /*---------- * API for catching ereport(ERROR) exits. Use these macros like so: * * PG_TRY(); * { * ... code that might throw ereport(ERROR) ... * } * PG_CATCH(); * { * ... error recovery code ... * } * PG_END_TRY(); * * (The braces are not actually necessary, but are recommended so that * pg_indent will indent the construct nicely.) The error recovery code * can optionally do PG_RE_THROW() to propagate the same error outwards. * * Note: while the system will correctly propagate any new ereport(ERROR) * occurring in the recovery section, there is a small limit on the number * of levels this will work for. It's best to keep the error recovery * section simple enough that it can't generate any new errors, at least * not before popping the error stack. * * Note: an ereport(FATAL) will not be caught by this construct; control will * exit straight through proc_exit(). Therefore, do NOT put any cleanup * of non-process-local resources into the error recovery section, at least * not without taking thought for what will happen during ereport(FATAL). * The PG_ENSURE_ERROR_CLEANUP macros provided by storage/ipc.h may be * helpful in such cases. *---------- */ #define PG_TRY() \ do { \ sigjmp_buf *save_exception_stack = PG_exception_stack; \ ErrorContextCallback *save_context_stack = error_context_stack; \ sigjmp_buf local_sigjmp_buf; \ if (sigsetjmp(local_sigjmp_buf, 0) == 0) \ { \ PG_exception_stack = &local_sigjmp_buf #define PG_CATCH() \ } \ else \ { \ PG_exception_stack = save_exception_stack; \ error_context_stack = save_context_stack #define PG_END_TRY() \ } \ PG_exception_stack = save_exception_stack; \ error_context_stack = save_context_stack; \ } while (0) /* * gcc understands __attribute__((noreturn)); for other compilers, insert * a useless exit() call so that the compiler gets the point. */ #ifdef __GNUC__ #define PG_RE_THROW() \ pg_re_throw() #else #define PG_RE_THROW() \ (pg_re_throw(), exit(1)) #endif extern PGDLLIMPORT sigjmp_buf *PG_exception_stack; /* Stuff that error handlers might want to use */ /* * ErrorData holds the data accumulated during any one ereport() cycle. * Any non-NULL pointers must point to palloc'd data. * (The const pointers are an exception; we assume they point at non-freeable * constant strings.) */ typedef struct ErrorData { int elevel; /* error level */ bool output_to_server; /* will report to server log? */ bool output_to_client; /* will report to client? */ bool show_funcname; /* true to force funcname inclusion */ bool hide_stmt; /* true to prevent STATEMENT: inclusion */ const char *filename; /* __FILE__ of ereport() call */ int lineno; /* __LINE__ of ereport() call */ const char *funcname; /* __func__ of ereport() call */ const char *domain; /* message domain */ int sqlerrcode; /* encoded ERRSTATE */ char *message; /* primary error message */ char *detail; /* detail error message */ char *detail_log; /* detail error message for server log only */ char *hint; /* hint message */ char *context; /* context message */ int cursorpos; /* cursor index into query string */ int internalpos; /* cursor index into internalquery */ char *internalquery; /* text of internally-generated query */ int saved_errno; /* errno at entry */ } ErrorData; extern void EmitErrorReport(void); extern ErrorData *CopyErrorData(void); extern void FreeErrorData(ErrorData *edata); extern void FlushErrorState(void); extern void ReThrowError(ErrorData *edata) __attribute__((noreturn)); extern void pg_re_throw(void) __attribute__((noreturn)); /* Hook for intercepting messages before they are sent to the server log */ typedef void (*emit_log_hook_type) (ErrorData *edata); extern PGDLLIMPORT emit_log_hook_type emit_log_hook; /* GUC-configurable parameters */ typedef enum { PGERROR_TERSE, /* single-line error messages */ PGERROR_DEFAULT, /* recommended style */ PGERROR_VERBOSE /* all the facts, ma'am */ } PGErrorVerbosity; extern int Log_error_verbosity; extern char *Log_line_prefix; extern int Log_destination; /* Log destination bitmap */ #define LOG_DESTINATION_STDERR 1 #define LOG_DESTINATION_SYSLOG 2 #define LOG_DESTINATION_EVENTLOG 4 #define LOG_DESTINATION_CSVLOG 8 /* Other exported functions */ extern void DebugFileOpen(void); extern char *unpack_sql_state(int sql_state); extern bool in_error_recursion_trouble(void); #ifdef HAVE_SYSLOG extern void set_syslog_parameters(const char *ident, int facility); #endif /* * Write errors to stderr (or by equal means when stderr is * not available). Used before ereport/elog can be used * safely (memory context, GUC load etc) */ extern void write_stderr(const char *fmt,...) /* This extension allows gcc to check the format string for consistency with the supplied arguments. */ __attribute__((format(PG_PRINTF_ATTRIBUTE, 1, 2))); #endif /* ELOG_H */