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t20src/mxerr.b36
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MODULE MXERR =
BEGIN
! COPYRIGHT (c) DIGITAL EQUIPMENT CORPORATION 1985, 1989.
! ALL RIGHTS RESERVED.
!
! THIS SOFTWARE IS FURNISHED UNDER A LICENSE AND MAY BE USED AND COPIED
! ONLY IN ACCORDANCE WITH THE TERMS OF SUCH LICENSE AND WITH THE
! INCLUSION OF THE ABOVE COPYRIGHT NOTICE. THIS SOFTWARE OR ANY OTHER
! COPIES THEREOF MAY NOT BE PROVIDED OR OTHERWISE MADE AVAILABLE TO ANY
! OTHER PERSON. NO TITLE TO AND OWNERSHIP OF THE SOFTWARE IS HEREBY
! TRANSFERRED.
!
! THE INFORMATION IN THIS SOFTWARE IS SUBJECT TO CHANGE WITHOUT NOTICE
! AND SHOULD NOT BE CONSTRUED AS A COMMITMENT BY DIGITAL EQUIPMENT
! CORPORATION.
!
! DIGITAL ASSUMES NO RESPONSIBILITY FOR THE USE OR RELIABILITY OF ITS
! SOFTWARE ON EQUIPMENT THAT IS NOT SUPPLIED BY DIGITAL.
!++
! FACILITY: MX's error handling routines
!
! ABSTRACT:
!
! This module contains the MX$ERROR_ROUTINE which is called by the $ERROR
! macro. In addition, the global error table, MXERRS, is defined in this
! module by the $ERROR_TABLE macro. The error strings themselves are
! maintained in the file MXERR.REQ. See that file for further details...
!
! ENVIRONMENT: BLISS-36
!
! AUTHOR: Richard B. Waddington , CREATION DATE: 21-March-1985
!
! MODIFIED BY:
!
! , : VERSION
! 01 -
!--
!
! INCLUDE FILES:
!
%IF %SWITCHES(TOPS20) %THEN
LIBRARY 'monsym';
LIBRARY 'mxjlnk';
%FI
LIBRARY 'mxnlib';
LIBRARY 'mxlib';
!
! TABLE OF CONTENTS:
!
FORWARD ROUTINE
mx$error_processor, !The main error processing routine.
mx$build_error_message, !Format an error string using NMU$TEXT.
log: NOVALUE, !Write an error string to the logfile.
link: NOVALUE; !Link an error string into the Message
! Table Entry.
!
! OWN STORAGE:
!
$error_table ;
!
! EXTERNAL REFERENCES:
!
EXTERNAL
logspc,
mxlogf,
mxlogm,
active_message_table;
EXTERNAL ROUTINE
mx$file_exists,
mx$file_routines,
mx$message_queue_routines,
nmu$text_manager,
nmu$sched_manager,
nmu$queue_manager,
nmu$memory_manager,
nmu$table_routines;
%global_routine ('MX$ERROR_PROCESSOR', signal_vector_) =
!++
! FUNCTIONAL DESCRIPTION:
!%(318)% Rewrite this routine
!
! This routine performs error handling for MX. Errors are described
! by a Bliss Condition Code. Condition Codes have 3 parts: SEVERITY
! (either Informational, Warning, or Severe), FACILITY (which piece of
! software encountered the error), and CODE (the error code itself). MX
! uses the CODE as an index into an error string table. The FACILITY
! field determines which table to use. There are several defined
! facilities: $ERR denotes the MXERRS table. This table contains general
! MX errors. $DCN denotes the DNERRS table. This table contains DECnet
! reject codes. For TOPS-10, there are also $FOP (for FILOP. errors),
! $ENQ (for ENQ. and DEQ. errors). Other tables may be added as needed.
! $MON is a special code that denotes monitor errors. On TOPS-20, it
! invokes code to expand jsys errors via the ERSTR% jsys. On TOPS-10,
! the optional data field is treated as a status value which in turn
! denotes the appropriate error table and index.
!
! INFORMATION ERRORS:
!
! An error string is built based on the Facility and Error Code.
! This string is written to the logfile.
!
! WARNING ERRORS:
!
! An error string is built based on the Facility and Error Code.
! This string is written to the logfile. If the ID field denotes a mail
! message, then this string is hooked into that message.
!
! SEVERE ERRORS:
!
! An error string is built based on the Facility and Error Code.
! This string is written to the logfile. If the ID field denotes a mail
! message, then this string is hooked into that message, and the message
! is rejected. If the ID field does not denote a mail message then this
! is a severe internal error, in which case, we crash MX.
!
! Error strings are built by making calls to the NMU$TEXT routine.
! Consequently, error strings may contain any directive supported by
! NMU$TEXT. If an error message contains a directive, then the call to
! this routine must include the data for the error message. Similarly,
! if an optional message is included, and it contains directives for
! NMU$TEXT, then the optional data must be included. For more details on
! individual message formats, see MXERR.REQ.
!
! This routine takes an argument block with the following format:
!
! SIGNAL_VECTOR: +---------------------------+ 0 $ecnt
! | Count |
! +---------------------------+ 1 $ecc
! | Condition Code |
! +---------------------------+ 2 $eamx
! | Message ID |
! +---------------------------+ 3 $edc
! ! OptDataCnt,,MsgDataCnt |
! +---------------------------+ 4 $emd
! \ Error message data \
! \ ... \
! \ \
! +---------------------------+
! | Opt. Msg Condition Code |
! +---------------------------+
! \ Optional message data \
! \ ... \
! \ \
! +---------------------------+
!
! The message id is the index into the Active Message Table.
!
! The condition code format is the same as the one defined in the
! Bliss Language Guide section on Condition Handling, and it contains the
! Severity level (STS$K_INFO, STS$K_WARNING, STS$K_SEVERE) the error code
! (an index into an error table), and the Facility ($ERR, $DCN, etc.)
! The Facility is used as an index into a meta-table (ERRTYP) to fetch
! the address of the table containing the error string. Note that the
! signal_vector is very similar to signal vectors used by the condition
! handling facilities of Bliss.
!
! FORMAL PARAMETERS:
!
! Signal_vector: The address of the argument block described above.
!
! IMPLICIT INPUTS:
!
! ERRTYP: The global table of error tables
!
! IMPLICIT OUTPUTS:
!
! NONE
!
! ROUTINE VALUE:
!
! NONE
!
! COMPLETION CODES:
!
! NONE
!
! SIDE EFFECTS:
!
! NONE
!
!--
BEGIN
BIND
sig = .signal_vector_: VECTOR,
cnt = sig[$ecnt],
cond = sig[$ecc]: CONDITION_VALUE,
msg_id = sig[$eamx],
data_counts = sig[$edc];
LOCAL
list_header,
len,
msg_data_block: REF message_table_entry,
err_msg;
len = mx$build_error_message(sig,err_msg);
log(.err_msg,.msg_id);
IF (.msg_id EQL 0) AND (.cond[STS$V_SEVERITY] EQL STS$K_SEVERE)
THEN
stop_program;
IF (.cond[STS$V_SEVERITY] EQL STS$K_WARNING) OR
(.cond[STS$V_SEVERITY] EQL STS$K_INFO)
THEN
BEGIN
nmu$memory_release(.err_msg,CH$ALLOCATION(.len));
RETURN 0;
END;
IF .msg_id NEQ 0
THEN
BEGIN
!
! Get the message data block
!
nmu$table_fetch(
active_message_table,
.msg_id<message_index>,
msg_data_block);
!
! Link in the error message
!
list_header = .msg_data_block[msg_err_list];
link(.err_msg, list_header);
msg_data_block[msg_err_list] = .list_header;
!
! Does this message have outstanding work requests still?
! If so, we're done for now.
!
IF .msg_data_block[msg_state] EQL $msg_incomplete
THEN
RETURN -2;
!
! Otherwise, set the message state appropriately.
!
IF .cond[STS$V_SEVERITY] EQL STS$K_SEVERE
THEN
msg_data_block[msg_state] = $msg_canceled
END;
RETURN 0;
END; !End of MX$ERROR_ROUTINE
%global_routine('MX$ERROR_HANDLER', SIG, MECH, ENBL) =
!++
! FUNCTIONAL DESCRIPTION:
!%(318)% Rewrite this routine
!
! This routine is a Bliss Condition Handler for MX. It is only
! invoked by MXLCL routines. It's purpose is similar to that of
! MX$ERROR_PROCESSOR.
!
! FORMAL PARAMETERS:
!
! SIG: Same as for MX$ERROR_PROCESSOR.
! MECH: The mechanism vector. See the bliss manual for
! more information.
! ENBL: The enable vector. The following items are passed
! here:
!
! +-----------------------------------+
! | Count of the following arguments |
! +-----------------------------------+
! | Address of IPCF header record |
! +-----------------------------------+
! | Address of Message Data Block |
! +-----------------------------------+
! | Address of current Recpient Record|
! +-----------------------------------+
!
! IMPLICIT INPUTS:
!
! NONE
!
! IMPLICIT OUTPUTS:
!
! NONE
!
! COMPLETION CODES:
!
!
! SIDE EFFECTS:
!
! NONE
!--
BEGIN
MAP
sig: REF VECTOR, ! signal vector
mech: REF VECTOR, ! mechanism vector
enbl: REF VECTOR; ! enable vector
BIND
cnt = sig[$ecnt],
cond = sig[$ecc]: CONDITION_VALUE,
msg_id = sig[$eamx],
data_counts = sig[$edc],
enbcnt = enbl[0],
hdr = .enbl[1]: REF ipcf_hdr,
msg = .enbl[2]: REF message_table_entry,
rec = .enbl[3]: REF ipcf_rec,
return_value = MECH
[
%BLISS16(1)
%BLISS36(1)
%BLISS32(3)
];
EXTERNAL LITERAL SS$UNW;
LOCAL
len,
err_msg;
IF sts$match(.cond, ss$unw)
THEN
RETURN 0;
len = mx$build_error_message(.sig,err_msg);
log(.err_msg,.msg_id);
nmu$memory_release(.err_msg, CH$ALLOCATION(.len));
return_value = 1;
IF .msg EQL 0
THEN
SETUNWIND()
ELSE
BEGIN
IF .cond[STS$V_SEVERITY] EQL STS$K_ERROR
THEN
BEGIN
SETUNWIND();
msg[msg_state] = $msg_canceled;
END
ELSE
IF .cond[STS$V_SEVERITY] EQL STS$K_SEVERE
THEN
msg[msg_state] = $msg_canceled
ELSE
msg[msg_state] = $msg_warning;
END;
IF .enbcnt EQL 3
THEN
rec[rec_error] = .cond[STS$V_CODE];
RETURN .return_value
END;
%global_routine ('MX$BUILD_ERROR_MESSAGE', signal_vector_, msg_) =
!++
!%(318)% Rewrite this routine
!
! FUNCTIONAL DESCRIPTION:
!
! This routine builds the error message string from the error table
! (MXERRS) and the data in the signal vector. This message is then copied to
! dynamic storage, and its address is returned.
!
! FORMAL PARAMETERS:
!
! Signal_vector: The address of the argument block described above.
!
! Msg: The address to return the address of the message string
!
! IMPLICIT INPUTS:
!
! MXERRS: The global error message table.
!
! IMPLICIT OUTPUTS:
!
! NONE
!
! ROUTINE VALUE:
!
! The address of the formatted error message.
!
! COMPLETION CODES:
!
! NONE
!
! SIDE EFFECTS:
!
! NONE
!
!--
BEGIN
BIND
msg = .msg_,
sig = .signal_vector_: VECTOR,
cnt = sig[$ecnt],
cond = sig[$ecc]: CONDITION_VALUE,
msg_id = sig[$eamx],
data_counts = sig[$edc];
BIND
err_msg_directive = CH$PTR(UPLIT(%ASCIZ '%A%I')),
opt_msg_directive = CH$PTR(UPLIT(%ASCIZ '%A%I%/%27S (%I)')),
wrn_prefix = CH$PTR(UPLIT(%ASCIZ '%')),
sev_prefix = CH$PTR(UPLIT(%ASCIZ '?')),
%IF %SWITCHES(TOPS20) %THEN
mon_opt_msg = CH$PTR(UPLIT(%ASCIZ '%J'));
%ELSE
mon_opt_msg = CH$PTR(UPLIT(%ASCIZ '%A'));
%FI
LOCAL
len,
directive,
buf_ptr,
arg_cnt,
opt_msg: REF CONDITION_VALUE,
arglist: VECTOR[20];
STACKLOCAL
buf: VECTOR[CH$ALLOCATION(256)];
!
! Get the prefix argument (% or ?)
!
arglist[0] = (
IF .cond[STS$V_SEVERITY] EQL STS$K_SEVERE
THEN
sev_prefix
ELSE
wrn_prefix);
!
! Get the error string directive based on the condition code
!
arglist[1] = .(.errtyp[.cond[STS$V_FAC_MX]] + .cond[STS$V_CODE]);
!
! Copy the error string arguments
!
INCR j FROM 0 TO .data_counts<right_half> - 1 DO
arglist[.j + 2] = .sig[$emd + .j];
!
! Get the Optional Message Condition Code
!
opt_msg = sig[$emd + .data_counts<right_half>];
!
! If there's an optional message, use the appropriate directive. Set the
! argument count.
!
arg_cnt = .data_counts<right_half> + 2;
IF ..opt_msg EQL 0
THEN
directive = err_msg_directive
ELSE
BEGIN
directive = opt_msg_directive;
!
! Since have an optional msg, include it and its arguments in the arglist.
!
%IF %SWITCHES(TOPS20) %THEN
arglist[.arg_cnt] = (
IF .opt_msg[STS$V_FAC_MX] EQL $mon
THEN
IF .sig[$emd + .data_counts<right_half> + 1] GTR %O'600000'
THEN
mon_opt_msg
ELSE
.mxerrs[.sig[$emd + .data_counts<right_half> + 1]]
ELSE
.(.errtyp[.opt_msg[STS$V_FAC_MX]] + .opt_msg[STS$V_CODE])
);
%ELSE !Begin TOPS-10 Conditional
IF .opt_msg[STS$V_FAC_MX] EQL $mon
THEN
opt_msg = .opt_msg + 1;
arglist[.arg_cnt] =
.(.errtyp[.opt_msg[STS$V_FAC_MX]] + .opt_msg[STS$V_CODE]);
%FI !End TOPS-10 Conditional
INCR j FROM 1 TO .data_counts<left_half> DO
arglist[.j + .arg_cnt] =
.sig[$emd + .data_counts<left_half> + .j];
arg_cnt = .arg_cnt + .data_counts<left_half> + 1;
END;
!
! Now, build the final string in the temporary buffer
!
buf_ptr = CH$PTR(buf);
len = nmu$text(buf_ptr, 256, .directive, .arg_cnt, arglist);
!
! Get memory for the string and copy it
!
msg = nmu$memory_get(CH$ALLOCATION(.len));
CH$MOVE(.len, CH$PTR(buf), CH$PTR(.msg));
RETURN .len
END; !End of MX$BUILD_ERROR_MESSAGE
%global_routine ('log', err_msg, id): NOVALUE =
!++
!%(318)% Add ID field to be displayed
!
! FUNCTIONAL DESCRIPTION:
!
! This routine takes an error message string and appends it to the log
! file (MX.LOG).
! FORMAL PARAMETERS:
!
! ERR_MSG: The address of the error message text string.
! ID: The id field to be displayed in the log file or 0.
! IMPLICIT INPUTS:
!
! NONE
!
! IMPLICIT OUTPUTS:
!
! NONE
!
! ROUTINE VALUE:
!
! NONE
!
! COMPLETION CODES:
!
! NONE
!
! SIDE EFFECTS:
!
! NONE
!
!--
BEGIN
LOCAL
idd,
len,
ptr,
error;
STACKLOCAL
tbuf: VECTOR[CH$ALLOCATION(40)],
buf: VECTOR[CH$ALLOCATION(max_string_length)];
IF .err_msg<left_half> EQL 0
THEN
err_msg = CH$PTR(.err_msg);
%IF %SWITCHES(TOPS20) %THEN
BEGIN
declare_jsys(odtim);
$$odtim(CH$PTR(tbuf),-1,0);
END;
%ELSE
udtdat(-1,tbuf);
%FI
IF .id EQL 0
THEN
BEGIN
idd = CH$PTR(UPLIT(%ASCIZ '%A'));
id = CH$PTR(UPLIT(%ASCIZ ' '))
END
ELSE
idd = CH$PTR(UPLIT(%ASCIZ '%(5R)H'));
ptr = CH$PTR(buf);
len = $nmu$text(ptr,max_string_length, '%A %I %A%/',
CH$PTR(tbuf),
.idd,
.id,
.err_msg) - 1;
IF .mxlogf EQL 0
THEN
BEGIN
IF mx$file_exists(CH$PTR(logspc))
THEN
mxlogm = file_access_append_only
ELSE
mxlogm = file_access_write_only;
mxlogf = mx$file_open(CH$PTR(logspc), .mxlogm, error);
END;
mx$file_write(.mxlogf, CH$PTR(buf), .len, error);
mxlogm = -1;
! $E_DISPLAY(CH$PTR(buf));
END; !End of MX$ERROR_ROUTINE
%global_routine ('elog', err_code, mid, dat, reason): NOVALUE =
!++
! FUNCTIONAL DESCRIPTION:
!
! This routine builds a single argument error string and writes it to
! the log file (MX.LOG).
!
! FORMAL PARAMETERS:
!
! ERR_CODE: An index into the $ERR table of errors.
! MID: The id field to be displayed in the log file or 0.
! DAT: The variable data to be displayed.
! REASON: For TOPS-20, either a jsys error, or a DECnet reject
! code. For TOPS-10, TAB,,INDEX identifying which error
! table and which error to display.
!
! IMPLICIT INPUTS:
!
! NONE
!
! IMPLICIT OUTPUTS:
!
! NONE
!
! ROUTINE VALUE:
!
! NONE
!
! COMPLETION CODES:
!
! NONE
!
! SIDE EFFECTS:
!
! NONE
!
!--
BEGIN
IF .reason EQL 0
THEN
$error( SEVERITY = STS$K_WARNING,
CODE = .err_code,
FACILITY = $err,
MESSAGE_DATA = .dat,
ID= .mid)
ELSE
%IF %SWITCHES(TOPS20) %THEN
IF .reason GTR %O'600000'
THEN
$error( SEVERITY = STS$K_WARNING,
CODE = .err_code,
FACILITY = $err,
MESSAGE_DATA = .dat,
OPTIONAL_MESSAGE = (FAC=$mon),
OPTIONAL_DATA = .reason,
ID= .mid)
ELSE
%FI !End TOPS20 CONDITIONAL
$error( SEVERITY = STS$K_WARNING,
CODE = .err_code,
FACILITY = $err,
MESSAGE_DATA = .dat,
OPTIONAL_MESSAGE = (FAC=$dcn,
SEV=STS$K_INFO,
COD=.reason),
ID= .mid)
END; !End of ELOG
%routine ('link', err_msg_, header_block_): NOVALUE =
!++
! FUNCTIONAL DESCRIPTION:
!
! This routine takes an error message string and links it into the
! message data block.
!
! FORMAL PARAMETERS:
!
! ERR_MSG: The address of the error message text string.
!
! HEADER_BLOCK: The address of the list header.
!
! IMPLICIT INPUTS:
!
! NONE
!
! IMPLICIT OUTPUTS:
!
! NONE
!
! ROUTINE VALUE:
!
! NONE
!
! COMPLETION CODES:
!
! NONE
!
! SIDE EFFECTS:
!
! NONE
!
!--
BEGIN
BIND
err_msg = .err_msg_,
header_block = .header_block_;
LOCAL
oldblk: REF list_blk,
newblk: REF list_blk;
newblk = mx$get_list_blk;
newblk[lst_data] = err_msg;
newblk[lst_next] = 0;
IF .header_block EQL 0
THEN
header_block = .newblk
ELSE
BEGIN
oldblk = .header_block;
WHILE .oldblk[lst_next] NEQ 0 DO oldblk = .oldblk[lst_next];
oldblk[lst_next] = .newblk;
END;
END; !End of MX$ERROR_ROUTINE
END !End of module
ELUDOM