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	TITLE	D36TRC		DECnet-10 Trace program
	SEARCH	DCN,SNUP
	XP $ONLY,I.LUO!I.PRM!I.GTT
	XP FTDEBUG,0
	$INIT	TRC
	.REQUI	REL:SNUP

XP BUFLEN,50000
XP BUFMAX,BUFLEN-5
XP TAKBYT,0
XP LSTBYT,2

$BLOCK	BUFFER,<BUFLEN/5>+3	;The buffer to be used by trace code
$BLOCK	FOPBLK,.FOMAX
$BLOCK	BUFF,3			;Buffer header ring
$BLOCK	SCBLK,.FXLEN		;Scan block storage
$BLOCK	LKBLK,.RBMAX
$BLOCK	PTBLK,.PTMAX
$BLOCK	NAME,5			;system's configuration name
$LVAR	S.TRAC
$LVAR	S.ETRA
$LVAR	LOKADR
$LVAR	CURBPT
$LVAR	CURBYT
$LVAR	DWNCNT
$LVAR	TIMFLG
$LVAR	LINBLK
$LVAR	MYJOB

DEFINE POINTS,<
ZZ=.
	AT DCNTRA,[MOVEI %T2,BUFFER]	;Snooped in. Add relocation
	AT ZERBPT,[POINT 7,BUFFER+3]	;Poked in - add relocation
	AT CURBPT,[POINT 7,BUFFER+3]	;Poked in - add relocation
ADDERR=.-ZZ
	AT LASBYT,[BUFLEN]		;Poked in - absolute quantity
	AT MAXBYT,[BUFMAX]		;poked in - absolute quantity
	AT CURBYT,[0]			;poked in - absolute quantity
	AT TRAJOB,MYJOB			;Poked in - absolute quantity
	AT S.TRAC,S.TRAC		;Poked in - mask
	AT S.ETRA,S.ETRA		;Poked in - mask
TOTPNT=.-ZZ
>

DEFINE	AT(NAME,STUFF),<
	RADIX50 0,NAME
>

$LOSEG

OUTARG:	XWD 1,OUTFIL
OUTFIL:	.FOOUT

	ADVANC	9,9		;Max 8 breakpoints, 8 symbols

LOCS:	POINTS

$BLOCK	SNPARG,2+2		;Argument block for snoop uuo

DEFINE	AT(NAME,STUFF),<
	EXP	STUFF
>

VALS:	POINTS

DEFINE SWTCHS,<
SL ETRACE,S.ETRA,TRNM,,FS.OBV
SL TRACE,S.TRAC,TRNM,,FS.OBV
SS ALLTRA,S.TRAC,-1,fs.obv
SS ALLETR,S.ETRA,-1,fs.obv
SS LINEBL,LINBLK,,
>

DOSCAN(MX.)

KEYS TRNM,<TST,XPT,NSP,SCT,USR,NMX>

D36TRC:	$SETUP			;Initialize the world
GETFIL:	
	SETOM	LINBLK		;Set only real scan switch to null
	MOVE	T1,[XWD 4,[
		XWD 12,%%FXVE
		IOWD MX.L,MX.N
		XWD MX.D,MX.M
		XWD 0,MX.P]]
	CALL	.PSCAN##	;intialize for FILIN
	 TSTRG.	[ASCIZ \D36TRC>\]
	CALL	.FILIN##	;Get a filespec.
	SKIPL	T1		;make sure we got a filespec
	 $WARN	FSR,<File spec required>,,,GETFIL
	MOVEI	T1,SCBLK	;address of my scan block
	MOVEI	T2,.FXLEN	;length of my scan block
	CALL	.GTSPC##	;get the specification
	MOVE	T1,[.FXLEN,,SCBLK] ;args for .STOPB
	MOVEI	T2,FOPBLK+1	;open block is hidden in the filop block
	MOVE	T3,[.RBMAX,,LKBLK] ;lookup block
	MOVEI	T4,PTBLK	;path block
	CALL	.STOPB##	;create the lookup and open block stuff
	 $ERROR	BFS,<Bad file spec>
	MOVE	T1,SCBLK+.FXFLD	;Get the fields field
	TXNN	T1,FX.UNM	;did he specify a filename?
	 JRST	[MOVSI T1,'TTY'	;No, default to tty
		MOVEM T1,FOPBLK+.FODEV
		SETZM LINBLK	;Flag line blocking mode
		$INFORM DFL,<Defaulting to TTY:/LINEBL>,,,FOSET]
FOSET:	MOVX	T1,.FOWRT	;function, write it out
	MOVX	T2,<UU.LBF!.IOASC> ;mode
	DMOVEM	T1,FOPBLK+.FOFNC ;save as function for filop
	MOVSI	T1,BUFF		;Output buffer only
	MOVSI	T2,^D6		;16 of 'em
	DMOVEM	T1,FOPBLK+.FOBRH ;Point to the ring headers
	MOVEI	T1,LKBLK	;Pointer to the lookup block
	MOVEM	T1,FOPBLK+.FOLEB
;Get our monitor symbols.
	MOVE	T1,[TOTPNT,,LOCS] ;Pointer to our symbol names
	CALL	GETADR##	;ask snup what the symbol values are
;Now open our file
	MOVE	T1,[.FOMAX,,FOPBLK]
	FILOP.	T1,		;do the enter on the file
	 $ERROR	FEF,<Filop enter failure, >,<flerr. t1,>,t1
	MOVE	T1,OUTARG	;Output argument
	FILOP.	T1,		;do the output, to set up the buffer rings.
	 $ERROR	OUF,<Out UUO failed, >,<lerr. t1,>,t1
;Initialize all the various byte pointers and byte counts
	SETZM	BUFFER+TAKBYT	;Current bytes taken == 0
	SETZM	BUFFER+LSTBYT	;Current lost bytes == 0
	MOVE	T1,[POINT 7,BUFFER+3] ;get byte pointer to start of buffer
	MOVEM	T1,CURBPT	;save as current byte pointer
	SETZM	CURBYT		;Current byte is byte 0
	SETOM	DWNCNT		;set downcounter to countedown
	PJOB	T1,		;Find out what job I am
	MOVEM	T1,MYJOB	;save it for later pokes.
	MOVEI	T1,1		;An HPQ to put us into
	HPQ	T1,		;WHAM!
	 $WARN	HPQ,<HPQ set failed>
;Following code must be nailed down.
	MOVX	T1,1		;Loseg only, and nail us down to the max
	LOCK	T1,		;Lock!
	 $ERROR	CNL,<Could not lock, code >,.TOCTW##,T1,ABORT
	LSH	T1,^D9		;make it an address, rather than a page
	HRRZM	T1,LOKADR	;save as displacement into the monitor
	MOVEI	T4,TOTPNT	;number of addresses to transfer
	MOVEI	T1,2+1		;Size of argument block we are feeding it
	MOVE	T2,CHKSUM	;Get the checksum that GETADR left us
	DMOVEM	T1,SNPARG	;Save double word in argument list
	MOVE	T1,LOCS		;get the single breakpoint location
	MOVEM	T1,SNPARG+2	;save as address to put first thingy
	MOVE	T1,@VALS	;get the single breakpoint value
	ADD	T1,LOKADR	;relocate it.
	MOVEM	T1,SNPARG+3	;Save as instruction to execute
	MOVE	T1,[.SODBP,,SNPARG] ;Argument to define breakpoints
	SNOOP.	T1,		;define them!
	 $ERROR	BDF,<Breakpoint define failed! Code >,.TOCTW##,T1,ABORT
VALPOK:	SUBI	T4,1		;decrement diplacement of word
	MOVE	T1,LOCS(T4)	;get address of breakpoint
	MOVE	T3,@VALS(T4)	;get value to put in it
	CAIGE	T4,ADDERR	;are we processing an addr, or a value?
	 ADD	T3,LOKADR	;address, adjust correspondingly
	CAIGE	T4,1		;Is this the last one?
	 JRST	INSBRK		;Yes, go do the snoop this time
	MOVE	T2,T1		;Get copy of address
	PEEK	T2,		;Find out what the monitor has there.
	MOVE	[3,,T1]		;Arg for poke
	POKE.			;poke the location to our value
	 $ERROR	PUF,<Poke UUO failed, Code >,.TOCTW##,T1,ABORT
	JRST	VALPOK

INSBRK:	MOVSI	T1,.SOIBP	;Insert the breakpoints!
	SNOOP.	T1,
	 $ERROR	BIF,<Breakpoint insert failed! Code >,.TOCTW##,T1,ABORT

;Set up for output to our file.
	XMOVEI	T1,PUTBYT	;address to call on a scan typout
	CALL	.TYOCH##	;tell scan about it
	TLINE.	[ASCIZ \DECnet-36 monitor mode trace facility, initialized at\]
	SETZM	TIMFLG
	TCRLF.
	SETZM	TIMFLG
	GTTAB.	T1,[%CNFG0]	;get configuration name
	MOVEM	T1,NAME		;save
	GTTAB.	T1,[%CNFG1]	;..
	MOVEM	T1,NAME+1
	GTTAB.	T1,[%CNFG2]
	MOVEM	T1,NAME+2
	GTTAB.	T1,[%CNFG3]
	MOVEM	T1,NAME+3
	GTTAB.	T1,[%CNFG4]
	MOVEM	T1,NAME+4
	TSTRG.	NAME		;type out system name
	TCHRI.	11		;Indent
	TDATN.			;type out today's date
	TCHRI.	":"
	TTIMN.			;And current time
	TCRLF.
	SETZM	TIMFLG
	TCRLF.

;This is where we will spend most of our time
G:
LOOP:	SOSL	BUFFER+TAKBYT	;get meself a byte
	 JRST [	CALL GETBYT	;Go move a byte from the buffer to disk
		JRST LOOP]	;And do another
	AOSLE	T1,BUFFER+TAKBYT ;no byte, put it back the way it was
	 JRST	LOOP		;Ah! a byte appeared! try again!
	JUMPL	T1,[$ERROR BFU,<Buffer fukked up! aborting!>,,,ABORT]
	INCHRS	T1		;Get a character if there is one
	JRST	SNOOZE		;nope, sleep for a while
	caie	t1,"q"		;quit command?
	 CAIN	T1,"Q"		;Is this a quit command?
	  JRST	ABORT		;yes, exit!!!
	SKIPE	.JBBPT		;Do we have DDT loaded?
	 JRST	[CAIN T1,"D"	;do we want to do DDT?
		JSR @.JBBPT	;Yes, go do it.
		JRST LOOP]	;Be forgiving of bad commands if DDT loaded.
	OUTSTR	[ASCIZ \Unknown command
\]
	JRST	LOOP


;Note - I want to fix this to have the monitor wake us up.
SNOOZE:	MOVX	T1,<HB.RTL!HB.RTC!HB.RWJ!HB.RWP!HB.RWT> ;Wake on anything
	HIBER	T1,		;Go to sleep for a minute
	 $ERROR	HUF,<Hiber UUO failed, aborting>,,,ABORT
	JRST	LOOP		;Got woken up for something

GETBYT:	SKIPN	BUFFER+LSTBYT	;did we lose any bytes?
	 JRST	GETBY1		;nope, proceed
	SETZM	BUFFER+LSTBYT	;Clean it out.
	SKIPL	DWNCNT		;Are we already downcounting?
	 JRST	GETBY1		;yes, we are in sad shape. Ignore this one
	MOVX	T1,BUFMAX	;Get buffer size
	MOVEM	T1,DWNCNT	;nastygram that many characters down the road.
GETBY1:	SOSN	DWNCNT		;number of charracters until nastygrgram
	 CALL	NASTYG		;output a nastygram first
	AOS	T1,CURBYT	;increment current byte position
	CAIGE	T1,BUFLEN	 ;make sure we haven't hit end of buffer
	 JRST	GETBY0		;get the actual byte
	MOVE	T1,[POINT 7,BUFFER+3] ;get byte pointer to bottom of buffer
	MOVEM	T1,CURBPT	;save as current bpt
	SETZM	T1,CURBYT	;zero current byte position
GETBY0:	ILDB	T1,CURBPT	;get current byte
PUTBYT:	AOSN	TIMFLG		;Flag to put out a time-stamp?
	JRST [	MOVE P1,T1	;save the character for a sec
		CALL .TTIMN##	;time stamp this line
		CALL .TSPAC##	;Separate the message from the timestamp
		MOVE T1,P1	;get character back
		JRST .+1]	;fall through
	SOSG	BUFF+2		;Decrement count of words avail in buffer
	 JRST	PUTBUF		;put the buffer to ....
DRPBYT:	IDPB	T1,BUFF+1	;put the actual byte in the buffer
	CAIE	T1,^D10		;Was this a line feed?
	 POPJ	P,		;ordinary character, return now
	SETOM	TIMFLG		;Yes, flag to do a time-stamp next character
	SKIPE	LINBLK		;are we in line blocking mode?
	 POPJ	P,		;no.
	MOVE	T1,OUTARG	;do the output, to get typeout in real time
	FILOP.	T1,		;OUT!
	 OUTSTR [ASCIZ \An OUT uuo failed!\]
	POPJ	P,		;go get another byte

PUTBUF:	MOVE	T1,OUTARG
	FILOP.	T1,		;do the output, to set up the buffer rings.
	 OUTSTR	[ASCIZ \An OUT uuo failed!!\]
	JRST	PUTBYT		;Go put the byte

NASTYG:	MOVEI T1,[ASCIZ \
Monitor characters lost.

\]
	JRST	.TSTRG##

ABORT:	CLOSE
	EXIT
LIT
	END	D36TRC