--- gforth/see.fs 1999/02/03 00:10:22 1.21 +++ gforth/see.fs 2003/01/26 20:56:37 1.49 @@ -1,6 +1,6 @@ \ SEE.FS highend SEE for ANSforth 16may93jaw -\ Copyright (C) 1995 Free Software Foundation, Inc. +\ Copyright (C) 1995,2000 Free Software Foundation, Inc. \ This file is part of Gforth. @@ -16,7 +16,7 @@ \ You should have received a copy of the GNU General Public License \ along with this program; if not, write to the Free Software -\ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. +\ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA. \ May be cross-compiled @@ -28,7 +28,19 @@ require look.fs require termsize.fs require wordinfo.fs -[IFUNDEF] .name : .name name>string type space ; [THEN] +[IFUNDEF] .name +: id. ( nt -- ) \ gforth + \G Print the name of the word represented by @var{nt}. + \ this name comes from fig-Forth + name>string type space ; + +' id. alias .id ( nt -- ) +\G F83 name for @code{id.}. + +' id. alias .name ( nt -- ) +\G Gforth <=0.5.0 name for @code{id.}. + +[THEN] decimal @@ -72,8 +84,9 @@ DEFER nlcount ' noop IS nlcount nlflag @ IF (nl) nlflag off THEN XPos @ over + cols u>= IF (nl) THEN ; -: c-to-upper - dup [char] a >= over [char] z <= and if bl - then ; +: c-to-upper ( c1 -- c2 ) \ gforth + \ nac05feb1999 there is a primitive, toupper, with this function + dup [char] a >= over [char] z <= and if bl - then ; : ctype ( adr len -- ) warp? dup XPos +! C-Output @ @@ -86,7 +99,7 @@ DEFER nlcount ' noop IS nlcount IF 2drop ELSE XPos +! C-Output @ IF emit ELSE drop THEN THEN ; -DEFER .string +DEFER .string ( c-addr u n -- ) [IFDEF] Green VARIABLE Colors Colors on @@ -107,6 +120,32 @@ VARIABLE Colors Colors on ' (.string) IS .string +: c-\type ( c-addr u -- ) + \ type string in \-escaped form + begin + dup while + 2dup newline string-prefix? if + '\ cemit 'n cemit + newline nip /string + else + over c@ + dup '" = over '\ = or if + '\ cemit cemit + else + dup bl 127 within if + cemit + else + base @ >r try + 8 base ! 0 <<# # # # '\ hold #> ctype #>> 0 + recover + endtry + r> base ! throw + endif + endif + 1 /string + endif + repeat + 2drop ; : .struc uppercase on Str# .string ; @@ -135,7 +174,7 @@ VARIABLE SearchPointer \ The branchtable consists of three entrys: \ address of branch , branch destination , branch type -CREATE BranchTable 500 allot +CREATE BranchTable 128 cells allot here 3 cells - ACONSTANT MaxTable @@ -175,12 +214,12 @@ ACONSTANT MaxTable : MyBranch ( a-addr -- a-addr a-addr2 ) \ finds branch table entry for branch at a-addr - dup @ over + + dup @ BranchAddr? BEGIN WHILE 1 cells - @ over <> - WHILE dup @ over + + WHILE dup @ MoreBranchAddr? REPEAT SearchPointer @ 3 cells - @@ -218,7 +257,8 @@ ACONSTANT MaxTable BranchPointer @ 1 cells - ! ; : Branch! ( a-addr rel -- a-addr ) - over + over ,Branch ,Branch 0 ,Branch ; + over ,Branch ,Branch 0 ,Branch ; +\ over + over ,Branch ,Branch 0 ,Branch ; \ DEFER CheckUntil VARIABLE NoOutput @@ -232,31 +272,78 @@ VARIABLE C-Pass : Display? ( -- flag ) C-Pass @ 1 = ; : Debug? ( -- flag ) C-Pass @ 2 = ; -: back? ( n -- flag ) 0< ; -: ahead? ( n -- flag ) 0> ; +: back? ( addr target -- addr flag ) + over u< ; -: c-(compile) - Display? +: .word ( addr x -- addr ) + \ print x as a word if possible + dup look 0= IF + drop dup threaded>name dup 0= if + 2drop dup 1 cells - @ dup body> look + IF + nip dup ." <" name>string rot wordinfo .string ." > " + ELSE + drop ." <" 0 .r ." > " + THEN + EXIT + then + THEN + nip dup cell+ @ immediate-mask and IF - s" POSTPONE " Com# .string - dup @ look 0= ABORT" SEE: No valid XT" - name>string 0 .string bl cemit + bl cemit ." POSTPONE " + THEN + dup name>string rot wordinfo .string + ; + +: c-call ( addr1 -- addr2 ) + Display? IF + dup @ body> .word bl cemit THEN cell+ ; -: c-lit +: c-callxt ( addr1 -- addr2 ) Display? IF - dup @ dup abs 0 <# #S rot sign #> 0 .string bl cemit + dup @ .word bl cemit THEN cell+ ; +\ here docon: , docol: , dovar: , douser: , dodefer: , dofield: , +\ here over - 2constant doers + +: c-lit ( addr1 -- addr2 ) + Display? IF + dup @ dup body> dup cfaligned over = swap in-dictionary? and if + ( addr1 addr1@ ) + dup body> @ dovar: = if + drop c-call EXIT + endif + endif + \ !! test for cfa here, and print "['] ..." + dup abs 0 <# #S rot sign #> 0 .string bl cemit + endif + cell+ ; + +: c-lit+ ( addr1 -- addr2 ) + Display? if + dup @ dup abs 0 <# #S rot sign #> 0 .string bl cemit + s" + " 0 .string + endif + cell+ ; + : .name-without ( addr -- addr ) -\ prints a name without () e.g. (+LOOP) or (s") - dup 1 cells - @ look - IF name>string over c@ '( = IF 1 /string THEN - 2dup + 1- c@ ') = IF 1- THEN .struc ELSE drop - THEN ; + \ !! the stack effect cannot be correct + \ prints a name without a() e.g. a(+LOOP) or (s") + dup 1 cells - @ threaded>name dup IF + name>string over c@ 'a = IF + 1 /string + THEN + over c@ '( = IF + 1 /string + THEN + 2dup + 1- c@ ') = IF 1- THEN .struc ELSE drop + THEN ; +[ifdef] (s") : c-c" Display? IF nl .name-without THEN count 2dup + aligned -rot @@ -265,19 +352,70 @@ VARIABLE C-Pass [char] " cemit bl cemit ELSE 2drop THEN ; +[endif] +: c-string? ( addr1 -- addr2 f ) + \ f is true if a string was found and decompiled. + \ if f is false, addr2=addr1 + \ recognizes the following patterns: + \ c": ahead X: len string then lit X + \ flit: ahead X: float then lit X f@ + \ s\": ahead X: string then lit X lit len + \ .\": ahead X: string then lit X lit len type + \ !! not recognized anywhere: + \ abort": if ahead X: len string then lit X c(abort") then + dup @ back? if false exit endif + dup @ >r + r@ @ decompile-prim ['] lit xt>threaded <> if rdrop false exit endif + r@ cell+ @ over cell+ <> if rdrop false exit endif + \ we have at least C" + r@ 2 cells + @ decompile-prim dup ['] lit xt>threaded = if + drop r@ 3 cells + @ over cell+ + aligned r@ = if + \ we have at least s" + r@ 4 cells + @ decompile-prim ['] lit-perform xt>threaded = + r@ 5 cells + @ ['] type >body = and if + 6 s\" .\\\" " + else + 4 s\" s\\\" " + endif + \ !! make newline if string too long? + display? if + 0 .string r@ cell+ @ r@ 3 cells + @ c-\type '" cemit bl cemit + else + 2drop + endif + nip cells r> + true exit + endif + endif + ['] f@ xt>threaded = if + display? if + r@ cell+ @ f@ 10 8 16 f>str-rdp 0 .string bl cemit + endif + drop r> 3 cells + true exit + endif + \ !! check if count matches space? + display? if + s\" c\" " 0 .string r@ cell+ @ count 0 .string '" cemit bl cemit + endif + drop r> 2 cells + true ; : Forward? ( a-addr true | false -- a-addr true | false ) -\ a-addr1 is pointer into branch table -\ returns true when jump is a forward jump - IF dup dup @ swap 1 cells - @ - - Ahead? IF true ELSE drop false THEN - \ only if forward jump - ELSE false THEN ; + \ a-addr is pointer into branch table + \ returns true when jump is a forward jump + IF + dup dup @ swap 1 cells - @ u> IF + true + ELSE + drop false + THEN + \ only if forward jump + ELSE + false + THEN ; : RepeatCheck ( a-addr1 a-addr2 true | false -- false ) IF BEGIN 2dup - 1 cells - @ swap dup @ + + 1 cells - @ swap @ u<= WHILE drop dup cell+ MoreBranchAddr? 0= @@ -287,7 +425,8 @@ VARIABLE C-Pass ELSE false THEN ; -: c-branch +: c-branch ( addr1 -- addr2 ) + c-string? ?exit Scan? IF dup @ Branch! dup @ back? @@ -381,9 +520,11 @@ VARIABLE C-Pass : c-do Display? IF nl .name-without level+ THEN ; -: c-?do - Display? IF nl S" ?DO" .struc level+ THEN - DebugBranch cell+ ; +: c-?do ( addr1 -- addr2 ) + Display? IF + nl .name-without level+ + THEN + DebugBranch cell+ ; : c-exit dup 1 cells - CheckEnd @@ -393,10 +534,6 @@ VARIABLE C-Pass THEN Debug? IF drop THEN ; -: c-does> \ end of create part - Display? IF S" DOES> " Com# .string THEN - maxaligned /does-handler + ; - : c-abort" count 2dup + aligned -rot Display? @@ -406,31 +543,54 @@ VARIABLE C-Pass ELSE 2drop THEN ; +[IFDEF] (does>) +: c-does> \ end of create part + Display? IF S" DOES> " Com# .string THEN + maxaligned /does-handler + ; +[THEN] + +[IFDEF] (compile) +: c-(compile) + Display? + IF + s" POSTPONE " Com# .string + dup @ look 0= ABORT" SEE: No valid XT" + name>string 0 .string bl cemit + THEN + cell+ ; +[THEN] CREATE C-Table ' lit A, ' c-lit A, - ' (s") A, ' c-c" A, - ' (.") A, ' c-c" A, - ' "lit A, ' c-c" A, + ' does-exec A, ' c-callxt A, + ' lit@ A, ' c-call A, +[IFDEF] call ' call A, ' c-call A, [THEN] +\ ' useraddr A, .... + ' lit-perform A, ' c-call A, + ' lit+ A, ' c-lit+ A, +[IFDEF] (s") ' (s") A, ' c-c" A, [THEN] +[IFDEF] (.") ' (.") A, ' c-c" A, [THEN] +[IFDEF] "lit ' "lit A, ' c-c" A, [THEN] [IFDEF] (c") ' (c") A, ' c-c" A, [THEN] ' (do) A, ' c-do A, -[IFDEF] (+do) ' (+do) A, ' c-do A, [THEN] -[IFDEF] (u+do) ' (u+do) A, ' c-do A, [THEN] -[IFDEF] (-do) ' (-do) A, ' c-do A, [THEN] -[IFDEF] (u-do) ' (u-do) A, ' c-do A, [THEN] +[IFDEF] (+do) ' (+do) A, ' c-?do A, [THEN] +[IFDEF] (u+do) ' (u+do) A, ' c-?do A, [THEN] +[IFDEF] (-do) ' (-do) A, ' c-?do A, [THEN] +[IFDEF] (u-do) ' (u-do) A, ' c-?do A, [THEN] ' (?do) A, ' c-?do A, ' (for) A, ' c-for A, ' ?branch A, ' c-?branch A, ' branch A, ' c-branch A, ' (loop) A, ' c-loop A, ' (+loop) A, ' c-loop A, -[IFDEF] (s+loop) ' (s+loop) A, ' c-loop A, [THEN] +[IFDEF] (s+loop) ' (s+loop) A, ' c-loop A, [THEN] [IFDEF] (-loop) ' (-loop) A, ' c-loop A, [THEN] ' (next) A, ' c-loop A, ' ;s A, ' c-exit A, - ' (does>) A, ' c-does> A, - ' (abort") A, ' c-abort" A, - ' (compile) A, ' c-(compile) A, +[IFDEF] (abort") ' (abort") A, ' c-abort" A, [THEN] +\ only defined if compiler is loaded +[IFDEF] (compile) ' (compile) A, ' c-(compile) A, [THEN] +[IFDEF] (does>) ' (does>) A, ' c-does> A, [THEN] 0 , here 0 , avariable c-extender @@ -438,20 +598,23 @@ c-extender ! \ DOTABLE 15may93jaw -: DoTable ( cfa -- flag ) - C-Table - BEGIN dup @ dup 0= - IF drop cell+ @ dup - IF ( next table!) dup @ ELSE - ( end!) 2drop false EXIT THEN - THEN - \ jump over to extender, if any 26jan97jaw - 2 pick <> - WHILE 2 cells + - REPEAT - nip cell+ perform - true - ; +: DoTable ( ca/cfa -- flag ) + decompile-prim C-Table BEGIN ( cfa table-entry ) + dup @ dup 0= IF + drop cell+ @ dup IF ( next table!) + dup @ + ELSE ( end!) + 2drop false EXIT + THEN + THEN + \ jump over to extender, if any 26jan97jaw + xt>threaded 2 pick <> + WHILE + 2 cells + + REPEAT + nip cell+ perform + true +; : BranchTo? ( a-addr -- a-addr ) Display? IF dup BranchAddr? @@ -471,17 +634,15 @@ c-extender ! THEN ; : analyse ( a-addr1 -- a-addr2 ) - Branches @ IF BranchTo? THEN - dup cell+ swap @ - dup >r DoTable r> swap IF drop EXIT THEN - Display? - IF look 0= IF drop dup 1 cells - @ . \ ABORT" SEE: Bua!" - ELSE - dup cell+ count dup immediate-mask and - IF bl cemit ." POSTPONE " THEN - 31 and rot wordinfo .string THEN bl cemit - ELSE drop - THEN ; + Branches @ IF BranchTo? THEN + dup cell+ swap @ + dup >r DoTable r> swap IF drop EXIT THEN + Display? + IF + .word bl cemit + ELSE + drop + THEN ; : c-init 0 YPos ! 0 XPos ! @@ -509,21 +670,54 @@ Defer xt-see-xt ( xt -- ) then space ; -Defer discode ( addr -- ) -\ hook for the disassembler: disassemble code at addr (as far as the -\ disassembler thinks is sensible) -:noname ( addr -- ) - drop ." ..." ; -IS discode +Defer discode ( addr u -- ) \ gforth +\G hook for the disassembler: disassemble code at addr of length u +' dump IS discode + +: next-head ( addr1 -- addr2 ) \ gforth + \G find the next header starting after addr1, up to here (unreliable). + here swap u+do + i head? -2 and if + i unloop exit + then + cell +loop + here ; + +: umin ( u1 u2 -- u ) + 2dup u> + if + swap + then + drop ; + +: next-prim ( addr1 -- addr2 ) \ gforth + \G find the next primitive after addr1 (unreliable) + 1+ >r -1 primstart + begin ( umin head R: boundary ) + @ dup + while + tuck name>int >code-address ( head1 umin ca R: boundary ) + r@ - umin + swap + repeat + drop dup r@ negate u>= + \ "umin+boundary within [0,boundary)" = "umin within [-boundary,0)" + if ( umin R: boundary ) \ no primitive found behind -> use a default length + drop 31 + then + r> + ; : seecode ( xt -- ) dup s" Code" .defname - threading-method + >code-address + dup in-dictionary? \ user-defined code word? if - >code-address + dup next-head + else + dup next-prim then - discode - ." end-code" cr ; + over - discode + ." end-code" cr ; : seevar ( xt -- ) s" Variable" .defname cr ; : seeuser ( xt -- ) @@ -537,10 +731,10 @@ IS discode : seedefer ( xt -- ) dup >body @ xt-see-xt cr dup s" Defer" .defname cr - >name dup ??? = if - drop ." lastxt >body !" - else + >name ?dup-if ." IS " .name cr + else + ." lastxt >body !" then ; : see-threaded ( addr -- ) C-Pass @ DebugMode = IF @@ -561,7 +755,8 @@ IS discode dup >body ." 0 " ? ." 0 0 " s" Field" .defname cr ; -: xt-see ( xt -- ) +: xt-see ( xt -- ) \ gforth + \G Decompile the definition represented by @i{xt}. cr c-init dup >does-code if @@ -585,7 +780,8 @@ IS discode [ [IFDEF] dofield: ] dofield: of seefield endof [ [THEN] ] - over >body of seecode endof + over of seecode endof \ direct threaded code words + over >body of seecode endof \ indirect threaded code words 2drop abort" unknown word type" ENDCASE ; @@ -605,7 +801,7 @@ IS discode if \ normal or immediate word swap xt-see (.immediate) else - r@ ['] compile-only-error = + r@ ['] ticking-compile-only-error = if \ compile-only word swap xt-see (.immediate) ." compile-only" else \ interpret/compile word @@ -624,7 +820,7 @@ IS discode \G etc.) is lost. name find-name dup 0= IF - drop -&13 bounce + drop -&13 throw THEN name-see ;