VolksForth/8086/msdos/tools.fb

\                                                 ks 22 dez 87                                                                  Some simple tools for debugging.                                A state-of-the-art, interactive single step tracer              and a couple of tools for decompiling and dumping                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               \ Programming-Tools word set                      cas 19july2020  Onlyforth \needs Assembler   2 loadfrom asm.fb                                                                                  Vocabulary Tools   Tools also definitions                                                                                       1 11 +thru   Onlyforth   .( Tools loaded ) cr                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 \ trace - next                                    ks 11 jun 87                                                                  | Variable nest?   nest? off                                                                                                      Label tracenext    0 # nest? #) byte cmp  0=                       ?[  $5555 # I cmp  here 2- >label (ip    >=                         ?[ [[ swap  lods   A W xchg   W ) jmp  ]?                       $5555 # I cmp  here 2- >label ip)    CS ?]                  ][  0 # nest? #) byte mov                                       ]?  $5555 # W mov  here 2- >label >tracing   W ) jmp         end-code                                                                                                                      | (ip Constant <ip        | ip) Constant ip>                                                                                    | : (debug   ( addr -- )   dup <ip !                                 BEGIN  1+ dup @  ['] unnest = UNTIL  2+ ip> ! ;            \ install Tracer                                  ks 11 jun 87                                                                    Label (do-trace   next-link # W mov   D push                       $E9 # A- mov   tracenext 1+ # C mov                             [[  W ) W mov   W W or  0= not                                      ?[[  A- -4 W D) mov   C D mov   W D sub                              D -3 W D) mov  ]]?  D pop   ret   end-code                                                                          Code do-trace   (do-trace # call   Next   end-code                                                                              ' end-trace Alias end-trace                                                                                                   | Code (step    (do-trace # call                                     R ) I mov   R inc   R inc   lods   A W xchg   W ) jmp                                                                      | Create: nextstep (step ;                                      \ tracer display                                  ks 20 sep 88                                                                  | Variable nest#   nest# off                                                                                                    | Variable 'ip     'ip off                                                                                                      | Create: -nest  r> ip> !   r> <ip !   -1 nest# +! ;                                                                            | : oneline   .status space                                          BEGIN  query  interpret  tib #tib @ + 1- c@ BL =                WHILE  prompt &36 tab  REPEAT                                   -$20 allot   r0 @ rp!   r> r0 !   r> dup #tib !                 rp@ over tib swap cmove   rp@ + rp!                             r> Is parser   r> adr 'quit !   r> >in !                        r> blk !   r> state !   r> output !   r> input ! ;                                                                         \ tracer display                                  ks 16 sep 88                                                                  | : tracing   end-trace  nest? @                                     IF  r>  <ip @ >r   ip> @ >r  -nest >r  >r                           1 nest# +!   r@ 2- (debug   nest? off  THEN  r@ 'ip !       nextstep >r   input @ >r  output @ >r  state @ >r               blk @ >r  >in @ >r  adr 'quit @ >r  adr parser @ >r             tib #tib @  rp@ over - under rp! cmove   #tib @ >r              r0 @ >r   rp@ r0 !   standardi/o                                cr nest# @ spaces   'ip @ dup 5 u.r   @ dup 5 u.r               2 spaces  >name .name   &30 nest# @ + tab .s                    $20 allot   ['] oneline Is 'quit   quit ;                    ' tracing >tracing !                                                                                                                                                                                                                                          \ test traceability                               ks 07 dez 87                                                                  | : traceable  ( cfa -- cfa' )   recursive  dup @                    [ ' :    @ ] Literal case? ?exit                                [ ' key  @ ] Literal case? IF  >body c@ Input @ +                                              @ traceable exit  THEN           [ ' type @ ] Literal case? IF  >body c@ Output @ +                                             @ traceable exit  THEN           [ ' r/w  @ ] Literal case? IF  >body @ traceable exit  THEN     c@ $E9 = IF  @ 1+ exit  THEN  \ Does> word                      >name .name ." can't be DEBUGged" quit ;                                                                                                                                                                                                                                                                                                                                                   \ user words for tracing                          ks 16 sep 88  | : do_debug  ( addr -- )                                            traceable (debug  nest? off  nest# off  do-trace ;                                                                           : nest            \ trace next high-level word executed            'ip @ @ traceable drop  nest? on ;                                                                                           : unnest          \ ends tracing of actual word                    <ip on  ip> off ; unnest   \ clears trap range                                                                               : endloop               \ stop tracing loop                        'ip @ <ip ! ;        \ use when at end of loop                                                                               : debug     ' do_debug ;                                                                                                        : trace     ' dup >r do_debug r> execute end-trace unnest ;   \ tools for decompiling, interactive use          ks 04 jul 87                                                                  | : ?:  ( addr -- addr )   dup    5 u.r ." :"  ;                | : @?  ( addr -- addr )   dup  @ 6 u.r ;                       | : c?  ( addr -- addr )   dup c@ 3  .r ;                       | : end                    $28 tab ;                                                                                              : s  ( addr1 -- addr2 )                                            ?: 3 spaces c? 2 spaces count 2dup type + even end ;         : n  ( addr1 -- addr2 )                                            ?: @? 2 spaces dup @ >name .name 2+ end ;                    : d  ( addr1 n -- addr2 )  2dup swap ?: 3 spaces                   swap 0 DO  c? 1+  LOOP  2 spaces -rot type end ;             : l  ( addr1 -- addr2 )   ?: 6 spaces @? 2+ end ;               : c  ( addr1 -- addr2 )   1 d end ;                             : b  ( addr1 -- addr2 )   ?: @? dup @  over + 6 u.r 2+ end ;  \ often  times                                    ks 29 jun 87    Onlyforth                                                                                                                       : often    stop? ?exit  >in off ;                                                                                             | Variable #times   #times off                                                                                                    : times   ( n -- )   ?dup                                          IF  #times @ 2+  u<  stop? or                                       IF  #times off exit  THEN  1 #times +!                      ELSE  stop? ?exit                                               THEN  >in off ;                                                                                                                                                                                                                                                                                                            \ dump                                            ks 04 jul 87                                                                    : dump  ( addr n -- )    base push hex                             bounds ?DO  cr I $10 [ Tools ] d [ Forth ] drop                             stop? IF LEAVE THEN  $10 +LOOP ;                                                                               | : ld  ( seg:addr -- )                                              over 4 u.r ." :" dup 0 <# # # # # #> type                       3 spaces   ds@ pad $10 lmove   pad $10 bounds                   DO  I c@ 3 u.r  LOOP   2 spaces  pad $10 type ;                                                                              : ldump  ( seg:addr quan -- )  base push hex                       0 DO  cr 2dup ld  $10 +  stop? IF LEAVE THEN                      $10 +LOOP  2drop ;                                                                                                                                                                       \ N>R  NR> cr                                                                                                                   : N>R  ( i * n +n -- ) ( R: -- j * x +n )                       \ Transfer N items and count to the return stack.                 DUP BEGIN DUP WHILE                                               ROT R> SWAP >R >R                                               1-                                                            REPEAT DROP  R> SWAP >R >R  ;                                                                                                 : NR>  ( -- i * x +n ) ( R: j * x +n -- )                       \ Pull N items and count off the return stack.                    R> R> SWAP >R DUP                                               BEGIN  DUP  WHILE                                                  R> R> SWAP >R -ROT                                              1-                                                          REPEAT  DROP  ;                                                \  ?                                                            : ?  ( a-addr -- )                                              \ Display the value stored at a-addr.                             @ . ;