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Trailing-Edge - PDP-10 Archives - BB-R775C-BM - sources/trace.mac
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	TITLE	TRACE

	SEARCH	MONSYM,MACSYM
	TWOSEG
	RELOC	0
	SALL
;****************************************************************************
;*									    *
;*  COPYRIGHT (C) 1985                                                      *
;*  BY DIGITAL EQUIPMENT CORPORATION, MAYNARD, MASS.			    *
;*  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.  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 WHICH IS NOT SUPPLIED BY DIGITAL.		    *
;*									    *
;****************************************************************************

;
; FUNCTIONAL SPEC:
;
;	This module is part of the EDT-36 system. Its function is to record
;	the total length of CPU time spent in a given routine. It accepts
;	the following arguments on the stack:
;
; ARGUMENTS:
;
;	.TFCN	the function code. This may be one of the following:
;
;		1 - Enable tracing on all or one routine
;		2 - Disable tracing on all or one routine
;		3 - Reset the trace database
;		4 - List the current state of the database
;		5 - Open the trace file, TRACE.DAT
;		6 - Close the trace file
;
;	.TPTR	Byte pointer to the name of the routine to trace, or 0.
;
;	.TNUM	Number of stack items to record on entry to routine.
;
;	.TLOC	Name of a memory location to record on entry.
;
; RETURN VALUE:
;
;	None - the routine prints its own error messages
;
; NOTE:
;
;	This routine will correctly cope with subroutines which begin
;	with any skip or non-skip instruction (including JSYS's), but
;	it cannot cope with jump class instructions (JUMPx, JRST, JSR)
;
	PAGE
	SUBTTL	DATABASE
	
	TRCLEN=10		;Number of slots in trace table
	STKMAX=4		;Maximum number of stack items to hold

	.TFCN=-4		;Offset to function code
	.TPTR=-3		;Offset to byte pointer
	.TNUM=-2		;Number of stack items to record
	.TLOC=-1		;Name of location to record

	A==1
	B==2
	C==3
	D==4
	E==5
	F==6
	G==7
	P==17


TRCMOD:	0			;Mode - 0 = off, 1 = on
TRCCNT:	0			;Number of routines being traced
TRCTIM:	0			;Time of TRACE ON
TRCTOT:	0			;Total CPU time of tracing
USRACS:	BLOCK	17		;Saved user AC's
TRCINS:	0			;Instruction to XCT
TRCADR:	0			;Address to return to
TRCJFN:	0			;JFN of trace file

;TRCTBL is the main data area for tracing routines. It has the following
;structure. The record written to the file consists of all but the last
;word of the data area.
;
;	+------------------+------------------+
;	|       Routine name (sixbit)         |
;	+------------------+------------------+
;	|          Routine address            |
;	+------------------+------------------+
;	|           Entry counter             |
;	+------------------+------------------+
;	|    First instruction of routine     |
;	+------------------+------------------+
;	|         CPU time on entry           |
;	+------------------+------------------+
;	|    Total CPU time for routine       |
;	+------------------+------------------+
;	|       Address of caller + 1         |
;	+------------------+------------------+
;	|    Number of stack items recorded   |
;	+------------------+------------------+
;	|            Stack item 1             |
;	+------------------+------------------+
;	|            Stack item 2             |
;	+------------------+------------------+
;	|            Stack item 3             |
;	+------------------+------------------+
;	|            Stack item 4             |
;	+------------------+------------------+
;	|      Value of AC1 on return         |
;	+------------------+------------------+
;	|   Name of location being recorded   |
;	+------------------+------------------+
;	| Address of location being recorded  |
;	+------------------+------------------+
;	|  Value of location being recorded   |
;	+------------------+------------------+
;	|    TRCOF$ + 3 * n (for return)      |
;	+------------------+------------------+

	PHASE	0

.TNAME:! BLOCK	1		;Routine name
.TADRS:! BLOCK	1		;Address
.TCNT:!  BLOCK	1		;Entry count
.TINST:! BLOCK	1		;First instruction
.TTIME:! BLOCK	1		;CPU time on entry
.TTOTL:! BLOCK	1		;Total CPU time
.TRETN:! BLOCK	1		;Return address
.TSCNT:! BLOCK	1		;Number of stack items
.TSTK:!  BLOCK	STKMAX		;First stack item
.TAC1:!  BLOCK	1		;Value of AC1
.TNAM1:! BLOCK	1		;Name of location to record
.TADR1:! BLOCK	1		;Address of location
.TVAL1:! BLOCK	1		;Value of location recorded
.TRPTR:! BLOCK	1		;Return pointer
.TLEN:!				;Length of block

	DEPHASE

DEFINE	X(A)<
	XLIST
	BLOCK	.TLEN-1
	EXP	^D'A*3+TRCOF$
	LIST
>

	%%N=0

TRCTBL:	REPEAT	TRCLEN,<
	X	\%%N
	%%N=%%N+1
>

	PAGE
	SUBTTL	MAIN ENTRY AND EXIT POINTS

	ENTRY	$TRACE
	RELOC	400000

$TRACE:
	MOVEM	16,USRACS+16		;Save the users AC's
	MOVEI	16,USRACS
	BLT	16,USRACS+15
	MOVE	A,.TPTR(P)		;Get the byte pointer
	SKIPG	B,.TFCN(P)		;Get the function code
	 JRST	T.ERR1			;Bad
	CAILE	B,6
	 JRST	T.ERR1			;Too large
	JRST	@[T.ON
		  T.OFF
		  T.RES
		  T.LIS
		  T.OPN
		  T.CLS]-1(B)		;Dispatch


T.RET:
	HRLZI	16,USRACS		;Restore user AC's
	BLT	16,15
	MOVE	16,USRACS+16
	RET

	PAGE
	SUBTTL	ERROR ROUTINES

DEFINE	ERRMSG(STR)<
	HRROI	A,[ASCIZ \STR\]
	JRST	TERROR
>

T.ERR1:
	ERRMSG	<Illegal function code>
T.ERR2:
	ERRMSG	<No symbol table found>
T.ERR3:
	ERRMSG	<Routine name not found in symbol table>
T.ERR4:
	ERRMSG	<Trace table full>
T.ERR5:
	ERRMSG	<Routine not being traced>
T.ERR6:
	ERRMSG	<Trace file already open>
T.ERR7:
	ERRMSG	<Cannot open trace file>
T.ERR8:
	ERRMSG	<Location name not found in symbol table>

TERROR:
	PUSH	P,A			;Save pointer for now
	TMSG	<
?TRACE - >
	POP	P,A
	PSOUT				;Do message
	TMSG	<
>
	JRST	T.RET

	PAGE
	SUBTTL	TRACE ON ROUTINE

T.ON:				;Switch on all or one routine
	SKIPN	A			;All?
	 JRST	T.ALL			;Yes
	SKIPN	B,.JBSYM##		;Any symbol table?
	 JRST	T.ERR2			;no
	CALL	T.SIX			;Get routine to sixbit
	CALL	T.R50			;Get routine to rad50
TON.1:
	CAMN	D,(B)			;Match?
	 JRST	TON.2			;Yes
	AOBJN	B,.+1			;Step past value
	AOBJN	B,TON.1			;Look for another
	JRST	T.ERR3			;Not found
TON.2:
	MOVE	B,1(B)			;Get routine address
	MOVE	D,[-TRCLEN,,TRCTBL]	;Point to table
TON.3:
	SKIPN	.TNAME(D)		;Is it in use?
	 JRST	TON.4			;No - found a free slot
	ADDI	D,.TLEN-1
	AOBJN	D,TON.3			;Look for another
	JRST	T.ERR4			;No free slots
TON.4:
	AOS	TRCCNT			;Count the number of entries
	MOVEM	C,.TNAME(D)		;Save the name for LIST
	MOVEM	B,.TADRS(D)		;Save the address
	MOVE	A,.TNUM(P)		;Number of stack items to record
	MOVEM	A,.TSCNT(D)
	SETZM	.TNAM1(D)		;Assume no location
	SETZM	.TADR1(D)		;Make sure of it
	SKIPN	A,.TLOC(P)		;Get pointer to name
	 JRST	T.RET
	PUSH	P,D			;Save pointer to entry
	CALL	T.SIX			;Convert name to SIXBIT
	CALL	T.R50			;Convert to RAD50
	MOVE	B,.JBSYM##
	POP	P,A			;Restore entry pointer
TON.5:
	CAMN	D,(B)			;Look for a symbol match
	 JRST	TON.6			;OK
	AOBJN	B,.+1
	AOBJN	B,TON.5			;Loop for more
	JRST	T.ERR8			;Not found
TON.6:
	MOVE	B,1(B)			;Get address of location
	MOVEM	C,.TNAM1(A)		;Save the name
	MOVEM	B,.TADR1(A)		;And the address
	JRST	T.RET
	PAGE
T.ALL:				;Trace all
	SKIPE	TRCMOD
	 JRST	T.RET			;Avoid setting it twice
	SETOM	TRCMOD			;Enable tracing
	MOVE	D,[-TRCLEN,,TRCTBL]	;Clear out the entries for a new run
TALL.1:
	SETZM	.TTOTL(D)
	SETZM	.TCNT(D)
	SKIPN	.TNAME(D)		;Anyone there?
	 JRST	TALL.2			;No
	MOVE	C,.TADRS(D)		;Get the first instruction
	MOVE	B,(C)
	MOVEM	B,.TINST(D)		;And put it in the table
	MOVEI	A,-TRCTBL(D)		;Get offset into table
	IDIVI	A,.TLEN			;Get slot number
	IMULI	A,3
	ADD	A,[CALL TRCON$]		;Get pointer to ON routine
	MOVEM	A,(C)			;Save the new instruction
TALL.2:
	ADDI	D,.TLEN-1
	AOBJN	D,TALL.1		;Loop for next one
	CALL	T.TIM			;Get current CPU time
	MOVEM	B,TRCTIM		;Save it
	SETZM	TRCTOT			;And clear the total
	JRST	T.RET

	PAGE
	SUBTTL	TRACE OFF ROUTINE

T.OFF:				;Stop tracing on one or all
	SKIPN	A			;All?
	 JRST	TOFF.3			;Yes
	CALL	T.SIX			;Get name to sixbit
	MOVE	4,[-TRCLEN,,TRCTBL]	;Point to table
TOFF.1:
	CAMN	C,.TNAME(D)		;Is this the one?
	 JRST	TOFF.2			;Yes
	ADDI	D,.TLEN-1
	AOBJN	D,TOFF.1
	JRST	T.ERR5			;Not found
TOFF.2:
	SOS	TRCCNT			;Decrement the counter
	SETZM	.TNAME(D)		;Just mark the slot as free
	SKIPE	B,.TINST(D)		;Get the instruction
	 MOVEM	B,@.TADRS(D)		;And restore it if non zero
	JRST	T.RET

TOFF.3:				;Stop all tracing
	SKIPN	TRCMOD			;Avoid second calculation
	 JRST	T.RET
	SETZM	TRCMOD			;Switch tracer off
	CALL	T.TIM			;Get CPU time
	SUB	B,TRCTIM		;Get total
	MOVEM	B,TRCTOT		;Save for LIST
	MOVE	D,[-TRCLEN,,TRCTBL]
TOFF.4:
	SKIPN	.TNAME(D)		;Is this one in use?
	 JRST	TOFF.5			;No
	MOVE	B,.TINST(D)		;Yes - restore its instruction
	SETZM	.TINST(D)		;And flag it
	MOVEM	B,@.TADRS(D)
TOFF.5:
	ADDI	D,.TLEN-1
	AOBJN	D,TOFF.4		;Loop over all entries
	JRST	T.RET

	PAGE
	SUBTTL	TRACE RESET ROUTINE

T.RES:
	SETZ	A,
	SKIPE	TRCMOD			;If trace mode was on
	 CALL	T.OFF			;Then turn it off
	MOVE	D,[-TRCLEN,,TRCTBL]
TRES.1:
	SETZM	.TNAME(D)		;Mark the slot as free
	ADDI	D,.TLEN-1
	AOBJN	D,TRES.1		;Loop over all the table
	JRST	T.RET

	PAGE
	SUBTTL	TRACE LIST ROUTINE

T.LIS:
	TMSG	<
TRACE status: >
	HRROI	A,[ASCIZ /ON
/]
	SKIPN	B,TRCMOD
	 HRROI	A,[ASCIZ /OFF
/]
	PSOUT				;Display current status
	SKIPN	TRCCNT			;Are any routines being traced?
	 JRST	T.RET			;No - done now
	JUMPN	B,TLIS.1		;Skip time if still running
	TMSG	<TRACE time:   >
	MOVEI	A,.PRIOU
	MOVE	B,TRCTOT
	MOVEI	C,^D10	
	NOUT				;Display total trace time
	 JFCL
	TMSG	<  mS CPU time
>

TLIS.1:
	MOVE	D,[-TRCLEN,,TRCTBL]
	TMSG	<
Routine   Entries   CPU time (mS)   Average   % Total
-------   -------   -------------   -------   -------
>

TLIS.2:
	SKIPN	.TNAME(D)		;Anything here?
	 JRST	TLIS.5			;no
	MOVE	B,[POINT 6,.TNAME(D)]	;Point to name
	MOVEI	C,6
TLIS.3:
	ILDB	A,B
	ADDI	A,40
	PBOUT				;Output each character
	SOJG	C,TLIS.3
	TMSG	<    >

	MOVEI	A,.PRIOU
	MOVE	B,.TCNT(D)		;Get number of entries
	MOVX	C,6B17+^D10
	NOUT
	 JFCL
	TMSG	<       >

	MOVEI	A,.PRIOU
	MOVE	B,.TTOTL(D)		;Get total CPU time
	MOVX	C,10B17+^D10
	NOUT	 
	 JFCL
	TMSG	<     >

	MOVEI	A,.PRIOU
	MOVE	B,.TTOTL(D)		;Get average CPU time
	MOVE	E,.TCNT(D)
	JUMPE	E,TLIS.4		;Ignore it if never entered
	IDIVI	B,(E)
	PUSH	P,C			;Save remainder
	MOVX	C,NO%LFL+5B17+^D10
	NOUT
	 JFCL
	MOVEI	A,"."
	PBOUT				;Insert a dot
	POP	P,A
	IMULI	A,^D10			;Make the first fraction digit
	IDIVI	A,(E)
	ADDI	A,"0"
	PBOUT				;And output it
	TMSG	<    >

	SKIPN	TRCTOT
	 JRST	TLIS.4			;Don't divide by zero
	MOVEI	A,.PRIOU
	MOVE	B,.TTOTL(D)		;Get %total
	IMULI	B,^D100
	IDIV	B,TRCTOT
	PUSH	P,C			;Save the remainder
	MOVX	C,NO%LFL+2B17+^D10
	NOUT
	 JFCL
	MOVEI	A,"."
	PBOUT				;Insert point
	POP	P,A
	IMULI	A,^D10			;Make first fraction digit
	IDIV	A,TRCTOT
	ADDI	A,"0"
	PBOUT				;And output it
TLIS.4:
	TMSG	<
>
TLIS.5:
	ADDI	D,.TLEN-1
	AOBJN	D,TLIS.2		;Loop for the next
	JRST	T.RET

	PAGE
	SUBTTL	OPEN AND CLOSE TRACE FILE

T.OPN:
	SKIPE	TRCJFN			;If already open
	 JRST	T.ERR6			; Then error
	MOVX	A,GJ%FOU+GJ%SHT
	MOVE	B,[POINT 7,[ASCIZ /TRACE.DAT/]]
	GTJFN
	 ERJMP	T.ERR7
	HRRZM	A,TRCJFN		;Save the JFN
	MOVEI	B,OF%WR			;36-bit write
	OPENF
	 ERJMP	T.ERR7
	GTAD				;Get the current date and time
	MOVE	B,A
	MOVE	A,TRCJFN
	BOUT				;And put it in the file
	GETNM				;Get the program name
	MOVE	B,A
	MOVE	A,TRCJFN
	BOUT				;And put it in the file
	MOVE	B,[STKMAX,,.TLEN-1]	;Get some flags
	MOVE	A,TRCJFN
	BOUT				;And put it in the file
	MOVNI	A,5
	RUNTM				;Get my runtime
	MOVE	B,A
	MOVE	A,TRCJFN
	BOUT				;Base runtime
	JRST	T.RET


T.CLS:
	SKIPE	A,TRCJFN
	 CLOSF				;Close it if it was open
	  JFCL
	SETZM	TRCJFN			;Assume its closed now
	JRST	T.RET

	PAGE
	SUBTTL	TRACE ENTRY AND EXIT ROUTINES

DEFINE	X(N)<
	XLIST
	PUSH	P,A
	MOVEI	A,^D'N*.TLEN+TRCTBL
	JRST	T.TRC
	LIST>

	%%N=0

TRCON$:
	REPEAT	TRCLEN,<
	X	\%%N
	%%N=%%N+1>

T.TRC:
	SKIPN	TRCMOD			;Tracing?
	 JRST	TTRC.1			;No
	AOS	.TCNT(A)		;Count the number of entries
	SKIPE	.TTIME(A)		;Recursive?
	 JRST	TTRC.1			;Yes - ignore it - we're there already
	PUSH	P,B
	MOVE	B,.TRPTR(A)		;Point to dummy return routine
	EXCH	B,-3(P)			;Get callers address
	MOVEM	B,.TRETN(A)		;Save it
	CALL	T.TIM			;Get current CPU time
	MOVEM	B,.TTIME(A)		;And save it
	POP	P,B
TTRC.1:
	SKIPN	TRCJFN			;Recording?
	 JRST	TTRC.3			; No
	PUSH	P,A
	PUSH	P,B
	MOVN	B,.TSCNT(A)		;Get number of stack items
	JUMPE	B,TTRC.2
	HRLS	B			;Make an AOBJN pointer
	HRR	B,A
	MOVEI	A,-5(P)
	HRLI	A,-STKMAX		;Make a stack pointer
	POP	A,.TSTK(B)		;Copy a stack item
	AOBJN	B,.-1			;Loop for next
TTRC.2:
	MOVE	A,-1(P)			;Point to entry table
	MOVE	B,@.TADR1(A)		;Get the value
	SKIPE	.TNAM1(A)		;If there is a location name
	 MOVEM	B,.TVAL1(A)		; Then save the value
	POP	P,B
	POP	P,A
TTRC.3:
	MOVE	A,.TINST(A)		;Get the first instruction
	MOVEM	A,TRCINS
	POP	P,A
	EXCH	A,(P)			;Now move the return address off the stack
	MOVEM	A,TRCADR
	POP	P,A			;And get A back properly
	XCT	TRCINS
	JRST	@TRCADR			;Return without using the stack
	CAIA				;Skip once
	 AOS	TRCADR			;Skip twice
	AOS	TRCADR
	JRST	@TRCADR			;Return 
	PAGE

DEFINE	X(N)<
	XLIST
	PUSH	P,A
	MOVEI	A,^D'N*.TLEN+TRCTBL
	JRST	T.TRCF
	LIST>

	%%N=0

TRCOF$:
	REPEAT	TRCLEN,<
	X	\%%N
	%%N=%%N+1>

T.TRCF:
	PUSH	P,B
	CALL	T.TIM			;Get current CPU time
	SUB	B,.TTIME(A)		;Get difference
	ADDM	B,.TTOTL(A)		;Save it
	SKIPN	TRCJFN			;If not recording
	 JRST	TRCF.1			; Then skip the write
	PUSH	P,A
	PUSH	P,B
	MOVE	B,-3(P)			;Get value in AC1
	MOVEM	B,.TAC1(A)
	MOVEI	B,(A)			;Point to entry table
	HRLI	B,(POINT 36,0)		;Make a byte pointer
	MOVE	A,TRCJFN
	MOVNI	C,.TLEN-1		;Length of record
	SOUT				;Write the record
	POP	P,C
	POP	P,A
TRCF.1:
	SETZM	.TTIME(A)		;Flag that we have finished
	POP	P,B
	MOVE	A,.TRETN(A)		;Get old stack entry
	EXCH	A,(P)
	RET				;Return to callers caller

	PAGE
	SUBTTL	SUPPORT ROUTINES

T.SIX:				;Get sixbit name in AC-C
	MOVEI	E,6
	MOVE	F,[POINT 6,C]
	SETZ	C,
	PUSH	P,A			;Save the pointer
TSIX.1:
	ILDB	G,A			;Get a byte
	JUMPE	G,TSIX.2		;End on null
	ANDI	G,177			;Make sure its 7-bit
	CAIL	G,140			;Convert lowercase to uppercase
	 SUBI	G,40
	SUBI	G,40			;And make it 6-bit
	IDPB	G,F
	SOJG	E,TSIX.1
TSIX.2:
	POP	P,A
	RET


T.TIM:				;Get current CPU time to AC-B
	PUSH	P,A
	PUSH	P,C			;Save these AC's
	MOVNI	A,5
	RUNTM				;Get my runtime
	MOVE	B,A
	POP	P,C
	POP	P,A
	RET


T.R50:				;Get name in RADIX50 to AC-D
	MOVEI	E,6
	SETZ	D,
	PUSH	P,A
TR50.1:
	ILDB	G,A			;Get a character
	JUMPE	G,TR50.2
	ANDI	G,177			;Make if 7-bit
	CAIL	G,140			;Convert lowercase to uppercase
	 SUBI	G,40
	SUBI	G,40			;And now 6-bit
	ADJBP	G,[POINT 6,R50TBL]	;Point into the conversion table
	ILDB	G,G
	IMULI	D,50			;Multiply
	ADD	D,G			;And add in next character
	SOJG	E,TR50.1
TR50.2:				;Here on trailing nulls
	MOVEI	A,1
	DPB	A,[POINT 4,D,3]		;Look for code 4 (global)
	POP	P,A
	RET

R50TBL:
	BYTE (6)00,00,00,00,46,47
	BYTE (6)00,00,00,00,00,00
	BYTE (6)00,00,45,00,01,02
	BYTE (6)03,04,05,06,07,10
	BYTE (6)11,12,00,00,00,00
	BYTE (6)00,00,00,13,14,15
	BYTE (6)16,17,20,21,22,23
	BYTE (6)24,25,26,27,30,31
	BYTE (6)32,33,34,35,36,37
	BYTE (6)40,41,42,43,44,00
	BYTE (6)00,00,00,00,00,00

	END