3 IMPORT S
:= SYSTEM
, stdlib
:= PosixCstdlib
, stdio
:= PosixCstdio
,
4 time
:= PosixCtime
, wctype
:= PosixCwctype
, sysmman
:= PosixCsys_mman
,
5 dlfcn
:= PosixCdlfcn
, fcntl
:= PosixCfcntl
, types
:= PosixCtypes
,
6 unistd
:= PosixCunistd
, signal
:= PosixCsignal
, setjmp
:= PosixCsetjmp
;
9 (* add signal blocking to avoid race conditions in Try/Trap/TrapHandler *)
10 (* add BeepHook for Beep *)
11 (* implement Call using libffi *)
17 timeResolution
* = 1000; (* ticks per second *)
19 processor
* = 1; (* generic c *)
21 objType
* = "ocf"; (* file types *)
25 (* loader constants *)
39 strictStackSweep
= FALSE
;
40 N
= 128 DIV 16; (* free lists *)
42 (* kernel flags in module desc *)
43 init
= 16; dyn
= 17; dll
= 24; iptrs
= 30;
45 (* meta interface consts *)
46 mConst
= 1; mTyp
= 2; mVar
= 3; mProc
= 4; mField
= 5;
49 Name
* = ARRAY nameLen
OF CHAR;
50 Utf8Name
* = ARRAY nameLen
OF SHORTCHAR
;
53 Module
* = POINTER TO RECORD [untagged
]
55 opts
-: SET; (* 0..15: compiler opts, 16..31: kernel flags *)
56 refcnt
-: INTEGER; (* <0: module invalidated *)
57 compTime
-, loadTime
-: ARRAY 6 OF SHORTINT;
58 ext
-: INTEGER; (* currently not used *)
59 term
-: Command
; (* terminator *)
60 nofimps
-, nofptrs
-: INTEGER;
61 csize
-, dsize
-, rsize
-: INTEGER;
62 code
-, data
-, refs
-: INTEGER;
63 procBase
-, varBase
-: INTEGER; (* meta base addresses *)
64 names
-: POINTER TO ARRAY [untagged
] OF SHORTCHAR
; (* names[0] = 0X *)
65 ptrs
-: POINTER TO ARRAY [untagged
] OF INTEGER;
66 imports
-: POINTER TO ARRAY [untagged
] OF Module
;
67 export
-: Directory
; (* exported objects (name sorted) *)
71 Type
* = POINTER TO RECORD [untagged
]
72 (* record: ptr to method n at offset - 4 * (n+1) *)
73 size
-: INTEGER; (* record: size, array: #elem, dyn array: 0, proc: sigfp *)
75 id
-: INTEGER; (* name idx * 256 + lev * 16 + attr * 4 + form *)
76 base
-: ARRAY 16 OF Type
; (* signature if form = ProcTyp *)
77 fields
-: Directory
; (* new fields (declaration order) *)
78 ptroffs
-: ARRAY any
OF INTEGER (* array of any length *)
81 Object
* = POINTER TO ObjDesc
;
83 ObjDesc
* = RECORD [untagged
]
85 offs
-: INTEGER; (* pvfprint for record types *)
86 id
-: INTEGER; (* name idx * 256 + vis * 16 + mode *)
87 struct
-: Type (* id of basic type or pointer to typedesc/signature *)
90 Directory
* = POINTER TO RECORD [untagged
]
91 num
-: INTEGER; (* number of entries *)
92 obj
-: ARRAY any
OF ObjDesc (* array of any length *)
95 Signature
* = POINTER TO RECORD [untagged
]
96 retStruct
-: Type
; (* id of basic type or pointer to typedesc or 0 *)
97 num
-: INTEGER; (* number of parameters *)
98 par
-: ARRAY any
OF RECORD [untagged
] (* parameters *)
99 id
-: INTEGER; (* name idx * 256 + kind *)
100 struct
-: Type (* id of basic type or pointer to typedesc *)
104 Handler
* = PROCEDURE;
106 Reducer
* = POINTER TO ABSTRACT
RECORD
110 Identifier
* = ABSTRACT
RECORD
115 TrapCleaner
* = POINTER TO ABSTRACT
RECORD
119 TryHandler
* = PROCEDURE (a
, b
, c
: INTEGER);
121 (* meta extension suport *)
123 ItemExt
* = POINTER TO ABSTRACT
RECORD END;
126 obj
*, vis
*, typ
*, adr
*: INTEGER;
133 Hook
* = POINTER TO ABSTRACT
RECORD END;
135 LoaderHook
* = POINTER TO ABSTRACT
RECORD (Hook
)
137 importing
*, imported
*, object
*: ARRAY 256 OF CHAR
140 Block
= POINTER TO RECORD [untagged
]
142 last
: INTEGER; (* arrays: last element *)
143 actual
: INTEGER; (* arrays: used during mark phase *)
144 first
: INTEGER (* arrays: first element *)
147 FreeBlock
= POINTER TO FreeDesc
;
149 FreeDesc
= RECORD [untagged
]
150 tag
: Type
; (* f.tag = ADR(f.size) *)
155 Cluster
= POINTER TO RECORD [untagged
]
156 size
: INTEGER; (* total size *)
158 max
: INTEGER (* exe: reserved size, dll: original address *)
159 (* start of first block *)
162 FList
= POINTER TO RECORD
168 CList
= POINTER TO RECORD
175 PtrType
= RECORD v
: S
.PTR
END; (* used for array of pointer *)
176 Char8Type
= RECORD v
: SHORTCHAR
END;
177 Char16Type
= RECORD v
: CHAR END;
178 Int8Type
= RECORD v
: BYTE END;
179 Int16Type
= RECORD v
: SHORTINT END;
180 Int32Type
= RECORD v
: INTEGER END;
181 Int64Type
= RECORD v
: LONGINT END;
182 BoolType
= RECORD v
: BOOLEAN END;
183 SetType
= RECORD v
: SET END;
184 Real32Type
= RECORD v
: SHORTREAL
END;
185 Real64Type
= RECORD v
: REAL END;
186 ProcType
= RECORD v
: PROCEDURE END;
187 UPtrType
= RECORD v
: INTEGER END;
188 StrPtr
= POINTER TO ARRAY [untagged
] OF SHORTCHAR
;
190 (* SYSTEM.h -> SYSTEM_DLINK *)
191 DLink
= POINTER TO RECORD [untagged
]
195 ArrStrPtr
= POINTER TO ARRAY [untagged
] OF StrPtr
;
197 ADDRESS
* = types
.Pvoid
;
204 err
-, pc
-, sp
-, fp
-, stack
-, val
-: INTEGER;
207 startEnv
: setjmp
.sigjmp_buf
;
208 tryEnv
: setjmp
.jmp_buf
;
209 startDLink
, tryDLink
: DLink
;
213 pagesize
: unistd
.long
;
215 free
: ARRAY N
OF FreeBlock
; (* free list *)
216 sentinelBlock
: FreeDesc
;
218 candidates
: ARRAY 1024 OF INTEGER;
220 allocated
: INTEGER; (* bytes allocated on BlackBox heap *)
221 total
: INTEGER; (* current total size of BlackBox heap *)
222 used
: INTEGER; (* bytes allocated on system heap *)
224 hotFinalizers
: FList
;
227 trapStack
: TrapCleaner
;
228 actual
: Module
; (* valid during module initialization *)
230 trapViewer
, trapChecker
: Handler
;
231 trapped
, guarded
, secondTrap
: BOOLEAN;
232 interrupted
: BOOLEAN;
233 static
, inDll
, terminating
: BOOLEAN;
239 wouldFinalize
: BOOLEAN;
241 watcher
*: PROCEDURE (event
: INTEGER); (* for debugging *)
245 PROCEDURE Erase (adr
, words
: INTEGER);
247 ASSERT(words
>= 0, 20);
256 PROCEDURE (VAR id
: Identifier
) Identified
* (): BOOLEAN, NEW, ABSTRACT
;
257 PROCEDURE (r
: Reducer
) Reduce
* (full
: BOOLEAN), NEW, ABSTRACT
;
258 PROCEDURE (c
: TrapCleaner
) Cleanup
*, NEW, EMPTY
;
260 (* meta extension suport *)
262 PROCEDURE (e
: ItemExt
) Lookup
* (name
: ARRAY OF CHAR; VAR i
: ANYREC
), NEW, ABSTRACT
;
263 PROCEDURE (e
: ItemExt
) Index
* (index
: INTEGER; VAR elem
: ANYREC
), NEW, ABSTRACT
;
264 PROCEDURE (e
: ItemExt
) Deref
* (VAR ref
: ANYREC
), NEW, ABSTRACT
;
266 PROCEDURE (e
: ItemExt
) Valid
* (): BOOLEAN, NEW, ABSTRACT
;
267 PROCEDURE (e
: ItemExt
) Size
* (): INTEGER, NEW, ABSTRACT
;
268 PROCEDURE (e
: ItemExt
) BaseTyp
* (): INTEGER, NEW, ABSTRACT
;
269 PROCEDURE (e
: ItemExt
) Len
* (): INTEGER, NEW, ABSTRACT
;
271 PROCEDURE (e
: ItemExt
) Call
* (OUT ok
: BOOLEAN), NEW, ABSTRACT
;
272 PROCEDURE (e
: ItemExt
) BoolVal
* (): BOOLEAN, NEW, ABSTRACT
;
273 PROCEDURE (e
: ItemExt
) PutBoolVal
* (x
: BOOLEAN), NEW, ABSTRACT
;
274 PROCEDURE (e
: ItemExt
) CharVal
* (): CHAR, NEW, ABSTRACT
;
275 PROCEDURE (e
: ItemExt
) PutCharVal
* (x
: CHAR), NEW, ABSTRACT
;
276 PROCEDURE (e
: ItemExt
) IntVal
* (): INTEGER, NEW, ABSTRACT
;
277 PROCEDURE (e
: ItemExt
) PutIntVal
* (x
: INTEGER), NEW, ABSTRACT
;
278 PROCEDURE (e
: ItemExt
) LongVal
* (): LONGINT, NEW, ABSTRACT
;
279 PROCEDURE (e
: ItemExt
) PutLongVal
* (x
: LONGINT), NEW, ABSTRACT
;
280 PROCEDURE (e
: ItemExt
) RealVal
* (): REAL, NEW, ABSTRACT
;
281 PROCEDURE (e
: ItemExt
) PutRealVal
* (x
: REAL), NEW, ABSTRACT
;
282 PROCEDURE (e
: ItemExt
) SetVal
* (): SET, NEW, ABSTRACT
;
283 PROCEDURE (e
: ItemExt
) PutSetVal
* (x
: SET), NEW, ABSTRACT
;
284 PROCEDURE (e
: ItemExt
) PtrVal
* (): ANYPTR
, NEW, ABSTRACT
;
285 PROCEDURE (e
: ItemExt
) PutPtrVal
* (x
: ANYPTR
), NEW, ABSTRACT
;
286 PROCEDURE (e
: ItemExt
) GetSStringVal
* (OUT x
: ARRAY OF SHORTCHAR
;
287 OUT ok
: BOOLEAN), NEW, ABSTRACT
;
288 PROCEDURE (e
: ItemExt
) PutSStringVal
* (IN x
: ARRAY OF SHORTCHAR
;
289 OUT ok
: BOOLEAN), NEW, ABSTRACT
;
290 PROCEDURE (e
: ItemExt
) GetStringVal
* (OUT x
: ARRAY OF CHAR; OUT ok
: BOOLEAN), NEW, ABSTRACT
;
291 PROCEDURE (e
: ItemExt
) PutStringVal
* (IN x
: ARRAY OF CHAR; OUT ok
: BOOLEAN), NEW, ABSTRACT
;
293 (* -------------------- miscellaneous tools -------------------- *)
295 PROCEDURE IsUpper
* (ch
: CHAR): BOOLEAN;
297 RETURN wctype
.iswupper(ORD(ch
)) # 0
300 PROCEDURE Upper
* (ch
: CHAR): CHAR;
302 RETURN CHR(wctype
.towupper(ORD(ch
)))
305 PROCEDURE IsLower
* (ch
: CHAR): BOOLEAN;
307 RETURN wctype
.iswlower(ORD(ch
)) # 0
310 PROCEDURE Lower
* (ch
: CHAR): CHAR;
312 RETURN CHR(wctype
.towlower(ORD(ch
)))
315 PROCEDURE IsAlpha
* (ch
: CHAR): BOOLEAN;
317 RETURN wctype
.iswalpha(ORD(ch
)) # 0
320 PROCEDURE Utf8ToString
* (IN in
: ARRAY OF SHORTCHAR
; OUT out
: ARRAY OF CHAR; OUT res
: INTEGER);
321 VAR i
, j
, val
, max
: INTEGER; ch
: SHORTCHAR
;
323 PROCEDURE FormatError();
324 BEGIN out
:= in$
; res
:= 2 (*format error*)
328 ch
:= in
[0]; i
:= 1; j
:= 0; max
:= LEN(out
) - 1;
329 WHILE (ch
# 0X
) & (j
< max
) DO
333 val
:= ORD(ch
) - 192;
334 IF val
< 0 THEN FormatError
; RETURN END ;
335 ch
:= in
[i
]; INC(i
); val
:= val
* 64 + ORD(ch
) - 128;
336 IF (ch
< 80X
) OR (ch
>= 0E0X
) THEN FormatError
; RETURN END ;
337 out
[j
] := CHR(val
); INC(j
)
339 val
:= ORD(ch
) - 224;
340 ch
:= in
[i
]; INC(i
); val
:= val
* 64 + ORD(ch
) - 128;
341 IF (ch
< 80X
) OR (ch
>= 0E0X
) THEN FormatError
; RETURN END ;
342 ch
:= in
[i
]; INC(i
); val
:= val
* 64 + ORD(ch
) - 128;
343 IF (ch
< 80X
) OR (ch
>= 0E0X
) THEN FormatError
; RETURN END ;
344 out
[j
] := CHR(val
); INC(j
)
351 IF ch
= 0X
THEN res
:= 0 (*ok*) ELSE res
:= 1 (*truncated*) END
354 PROCEDURE StringToUtf8
* (IN in
: ARRAY OF CHAR; OUT out
: ARRAY OF SHORTCHAR
; OUT res
: INTEGER);
355 VAR i
, j
, val
, max
: INTEGER;
357 i
:= 0; j
:= 0; max
:= LEN(out
) - 3;
358 WHILE (in
[i
] # 0X
) & (j
< max
) DO
359 val
:= ORD(in
[i
]); INC(i
);
361 out
[j
] := SHORT(CHR(val
)); INC(j
)
362 ELSIF val
< 2048 THEN
363 out
[j
] := SHORT(CHR(val
DIV 64 + 192)); INC(j
);
364 out
[j
] := SHORT(CHR(val
MOD 64 + 128)); INC(j
)
366 out
[j
] := SHORT(CHR(val
DIV 4096 + 224)); INC(j
);
367 out
[j
] := SHORT(CHR(val
DIV 64 MOD 64 + 128)); INC(j
);
368 out
[j
] := SHORT(CHR(val
MOD 64 + 128)); INC(j
)
372 IF in
[i
] = 0X
THEN res
:= 0 (*ok*) ELSE res
:= 1 (*truncated*) END
375 PROCEDURE SplitName
* (name
: ARRAY OF CHAR; VAR head
, tail
: ARRAY OF CHAR);
377 VAR i
, j
: INTEGER; ch
, lch
: CHAR;
379 i
:= 0; ch
:= name
[0];
382 head
[i
] := ch
; lch
:= ch
; INC(i
); ch
:= name
[i
]
383 UNTIL (ch
= 0X
) OR (ch
= ".") OR IsUpper(ch
) & ~
IsUpper(lch
);
384 IF ch
= "." THEN i
:= 0; ch
:= name
[0] END;
385 head
[i
] := 0X
; j
:= 0;
386 WHILE ch
# 0X
DO tail
[j
] := ch
; INC(i
); INC(j
); ch
:= name
[i
] END;
388 IF tail
= "" THEN tail
:= head$
; head
:= "" END
389 ELSE head
:= ""; tail
:= ""
393 PROCEDURE MakeFileName
* (VAR name
: ARRAY OF CHAR; type
: ARRAY OF CHAR);
394 VAR i
, j
: INTEGER; ext
: ARRAY 8 OF CHAR; ch
: CHAR;
397 WHILE (name
[i
] # 0X
) & (name
[i
] # ".") DO INC(i
) END;
398 IF name
[i
] = "." THEN
399 IF name
[i
+ 1] = 0X
THEN name
[i
] := 0X
END
401 IF type
= "" THEN ext
:= docType
ELSE ext
:= type$
END;
402 IF i
< LEN(name
) - LEN(ext$
) - 1 THEN
403 name
[i
] := "."; INC(i
); j
:= 0; ch
:= ext
[0];
405 name
[i
] := Lower(ch
); INC(i
); INC(j
); ch
:= ext
[j
]
412 PROCEDURE Time
* (): LONGINT;
413 VAR res
: time
.int
; tp
: time
.struct_timespec
;
415 ASSERT(timeResolution
>= 1);
416 ASSERT(timeResolution
<= 1000000000);
417 res
:= time
.clock_gettime(time
.CLOCK_MONOTONIC
, tp
);
418 ASSERT(res
= 0, 100);
419 RETURN tp
.tv_sec
* LONG(timeResolution
) + tp
.tv_nsec
DIV LONG(1000000000 DIV timeResolution
)
426 PROCEDURE SearchProcVar
* (var
: INTEGER; VAR m
: Module
; VAR adr
: INTEGER);
428 adr
:= var
; m
:= NIL;
431 WHILE (m
# NIL) & ((var
< m
.code
) OR (var
>= m
.code
+ m
.csize
)) DO m
:= m
.next
END;
432 IF m
# NIL THEN DEC(adr
, m
.code
) END
436 (* -------------------- system memory management --------------------- *)
438 PROCEDURE AllocMem (size
: sysmman
.size_t
; VAR max
: sysmman
.size_t
): ADDRESS
;
439 VAR fd
, flags
, res
: fcntl
.int
; ptr
: ADDRESS
;
441 max
:= (size
+ pagesize
- 1) DIV pagesize
* pagesize
;
442 fd
:= fcntl
.open("/dev/zero", fcntl
.O_RDWR
, 0);
444 flags
:= sysmman
.PROT_READ
+ sysmman
.PROT_WRITE
;
445 ptr
:= sysmman
.mmap(0, max
, flags
, sysmman
.MAP_PRIVATE
, fd
, 0);
446 IF ptr
= sysmman
.MAP_FAILED
THEN ptr
:= 0 END;
447 res
:= unistd
.close(fd
);
455 PROCEDURE FreeMem (adr
: ADDRESS
; size
: sysmman
.size_t
);
456 VAR res
: sysmman
.int
;
458 size
:= (size
+ pagesize
- 1) DIV pagesize
* pagesize
;
459 res
:= sysmman
.munmap(adr
, size
);
463 PROCEDURE AllocHeapMem (size
: INTEGER; VAR c
: Cluster
);
464 CONST N
= 65536; (* cluster size for dll *)
465 VAR adr
, allocated
, newsize
: INTEGER;
468 ASSERT(size
> 0, 100); adr
:= 0;
470 adr
:= AllocMem(N
, newsize
);
474 adr
:= AllocMem(size
, newsize
);
477 IF adr
= 0 THEN c
:= NIL
479 c
:= S
.VAL(Cluster
, (adr
+ 15) DIV 16 * 16); c
.max
:= adr
;
480 c
.size
:= allocated
- (S
.VAL(INTEGER, c
) - adr
);
481 INC(used
, c
.size
); INC(total
, c
.size
)
483 ASSERT((adr
= 0) OR (adr
MOD 16 = 0) & (c
.size
>= size
), 101);
484 (* post: (c = NIL) OR (c MOD 16 = 0) & (c.size >= size) *)
487 PROCEDURE FreeHeapMem (c
: Cluster
);
489 DEC(used
, c
.size
); DEC(total
, c
.size
);
490 FreeMem(S
.VAL(ADDRESS
, c
.max
), c
.size
)
493 PROCEDURE HeapFull (size
: INTEGER): BOOLEAN;
498 PROCEDURE AllocModMem
* (descSize
, modSize
: INTEGER; VAR descAdr
, modAdr
: INTEGER);
500 descAdr
:= 0; modAdr
:= 0;
501 descAdr
:= AllocMem(descSize
, descSize
);
503 modAdr
:= AllocMem(modSize
, modSize
);
505 FreeMem(descAdr
, descSize
)
507 INC(used
, descSize
+ modSize
)
512 PROCEDURE DeallocModMem
* (descSize
, modSize
, descAdr
, modAdr
: INTEGER);
514 FreeMem(descAdr
, descSize
);
515 FreeMem(modAdr
, modSize
);
516 DEC(used
, descSize
+ modSize
)
519 PROCEDURE InvalModMem (modSize
, modAdr
: INTEGER);
521 FreeMem(modAdr
, modSize
)
524 PROCEDURE TryRead (from
, to
, c
: INTEGER);
525 VAR i
: INTEGER; x
: BYTE;
528 FOR i
:= from
TO to
DO
532 FOR i
:= to
TO from BY
-1 DO
538 PROCEDURE^ Try
* (h
: TryHandler
; a
, b
, c
: INTEGER);
540 PROCEDURE IsReadable
* (from
, to
: INTEGER): BOOLEAN;
544 Try(TryRead
, from
, to
, 0);
548 (* --------------------- NEW implementation (portable) -------------------- *)
550 PROCEDURE^
NewBlock (size
: INTEGER): Block
;
552 PROCEDURE NewRec
* (typ
: INTEGER): INTEGER; (* implementation of NEW(ptr) *)
553 VAR size
, adr
: INTEGER; b
: Block
; tag
: Type
; l
: FList
;
556 tag
:= S
.VAL(Type
, typ
);
557 b
:= NewBlock(tag
.size
);
560 S
.GET(typ
- 4, size
);
561 IF size
# 0 THEN (* record uses a finalizer *)
562 l
:= S
.VAL(FList
, S
.ADR(b
.last
)); (* anchor new object! *)
563 l
:= S
.VAL(FList
, NewRec(S
.TYP(FList
))); (* NEW(l) *)
564 l
.blk
:= b
; l
.next
:= finalizers
; finalizers
:= l
571 HALT(100) (* COM interface pointers not supported *)
576 PROCEDURE NewArr
* (eltyp
, nofelem
, nofdim
: INTEGER): INTEGER; (* impl. of NEW(ptr, dim0, dim1, ...) *)
577 VAR b
: Block
; size
, headSize
: INTEGER; t
: Type
;
580 |
-1: HALT(100) (* COM interface pointers not supported *)
581 |
0: eltyp
:= S
.ADR(PtrType
)
582 |
1: eltyp
:= S
.ADR(Char8Type
)
583 |
2: eltyp
:= S
.ADR(Int16Type
)
584 |
3: eltyp
:= S
.ADR(Int8Type
)
585 |
4: eltyp
:= S
.ADR(Int32Type
)
586 |
5: eltyp
:= S
.ADR(BoolType
)
587 |
6: eltyp
:= S
.ADR(SetType
)
588 |
7: eltyp
:= S
.ADR(Real32Type
)
589 |
8: eltyp
:= S
.ADR(Real64Type
)
590 |
9: eltyp
:= S
.ADR(Char16Type
)
591 |
10: eltyp
:= S
.ADR(Int64Type
)
592 |
11: eltyp
:= S
.ADR(ProcType
)
593 |
12: HALT(101) (* COM interface pointers not supported *)
595 ASSERT(~
ODD(eltyp
), 102) (* COM interface pointers not supported *)
597 t
:= S
.VAL(Type
, eltyp
);
598 headSize
:= 4 * nofdim
+ 12;
599 size
:= headSize
+ nofelem
* t
.size
;
602 b
.tag
:= S
.VAL(Type
, eltyp
+ 2); (* tag + array mark *)
603 b
.last
:= S
.ADR(b
.last
) + size
- t
.size
; (* pointer to last elem *)
604 b
.first
:= S
.ADR(b
.last
) + headSize
; (* pointer to first elem *)
611 (* -------------------- handler installation (portable) --------------------- *)
613 PROCEDURE ThisFinObj
* (VAR id
: Identifier
): ANYPTR
;
616 ASSERT(id
.typ
# 0, 100);
619 IF S
.VAL(INTEGER, l
.blk
.tag
) = id
.typ
THEN
620 id
.obj
:= S
.VAL(ANYPTR
, S
.ADR(l
.blk
.last
));
621 IF id
.Identified() THEN RETURN id
.obj
END
628 PROCEDURE InstallReducer
* (r
: Reducer
);
630 r
.next
:= reducers
; reducers
:= r
633 PROCEDURE InstallTrapViewer
* (h
: Handler
);
636 END InstallTrapViewer
;
638 PROCEDURE InstallTrapChecker
* (h
: Handler
);
641 END InstallTrapChecker
;
643 PROCEDURE PushTrapCleaner
* (c
: TrapCleaner
);
646 t
:= trapStack
; WHILE (t
# NIL) & (t
# c
) DO t
:= t
.next
END;
648 c
.next
:= trapStack
; trapStack
:= c
651 PROCEDURE PopTrapCleaner
* (c
: TrapCleaner
);
655 WHILE (trapStack
# NIL) & (t
# c
) DO
656 t
:= trapStack
; trapStack
:= trapStack
.next
660 PROCEDURE InstallCleaner
* (p
: Command
);
663 c
:= S
.VAL(CList
, NewRec(S
.TYP(CList
))); (* NEW(c) *)
664 c
.do
:= p
; c
.trapped
:= FALSE
; c
.next
:= cleaners
; cleaners
:= c
667 PROCEDURE RemoveCleaner
* (p
: Command
);
670 c
:= cleaners
; c0
:= NIL;
671 WHILE (c
# NIL) & (c
.do
# p
) DO c0
:= c
; c
:= c
.next
END;
673 IF c0
= NIL THEN cleaners
:= cleaners
.next
ELSE c0
.next
:= c
.next
END
680 c
:= cleaners
; c0
:= NIL;
683 c
.trapped
:= TRUE
; c
.do
; c
.trapped
:= FALSE
; c0
:= c
685 IF c0
= NIL THEN cleaners
:= cleaners
.next
686 ELSE c0
.next
:= c
.next
693 (* -------------------- meta information (portable) --------------------- *)
695 PROCEDURE (h
: LoaderHook
) ThisMod
* (IN name
: ARRAY OF CHAR): Module
, NEW, ABSTRACT
;
697 PROCEDURE SetLoaderHook
*(h
: LoaderHook
);
702 PROCEDURE InitModule (mod
: Module
); (* initialize linked modules *)
705 IF ~
(dyn
IN mod
.opts
) & (mod
.next
# NIL) & ~
(init
IN mod
.next
.opts
) THEN InitModule(mod
.next
) END;
706 IF ~
(init
IN mod
.opts
) THEN
707 body
:= S
.VAL(Command
, mod
.code
);
708 INCL(mod
.opts
, init
);
710 body(); actual
:= NIL
714 PROCEDURE ThisLoadedMod
* (IN name
: ARRAY OF CHAR): Module
; (* loaded modules only *)
715 VAR m
: Module
; res
: INTEGER; n
: Utf8Name
;
717 StringToUtf8(name
, n
, res
); ASSERT(res
= 0);
720 WHILE (m
# NIL) & ((m
.name
# n
) OR (m
.refcnt
< 0)) DO m
:= m
.next
END;
721 IF (m
# NIL) & ~
(init
IN m
.opts
) THEN InitModule(m
) END;
722 IF m
= NIL THEN loadres
:= moduleNotFound
END;
726 PROCEDURE ThisMod
* (IN name
: ARRAY OF CHAR): Module
;
730 RETURN loader
.ThisMod(name
)
732 RETURN ThisLoadedMod(name
)
736 PROCEDURE LoadMod
* (IN name
: ARRAY OF CHAR);
742 PROCEDURE GetLoaderResult
* (OUT res
: INTEGER; OUT importing
, imported
, object
: ARRAY OF CHAR);
746 importing
:= loader
.importing$
;
747 imported
:= loader
.imported$
;
748 object
:= loader
.object$
757 PROCEDURE ThisObject
* (mod
: Module
; IN name
: ARRAY OF CHAR): Object
;
758 VAR l
, r
, m
, res
: INTEGER; p
: StrPtr
; n
: Utf8Name
;
760 StringToUtf8(name
, n
, res
); ASSERT(res
= 0);
761 l
:= 0; r
:= mod
.export
.num
;
762 WHILE l
< r
DO (* binary search *)
764 p
:= S
.VAL(StrPtr
, S
.ADR(mod
.names
[mod
.export
.obj
[m
].id
DIV 256]));
765 IF p^
= n
THEN RETURN S
.VAL(Object
, S
.ADR(mod
.export
.obj
[m
])) END;
766 IF p^
< n
THEN l
:= m
+ 1 ELSE r
:= m
END
771 PROCEDURE ThisDesc
* (mod
: Module
; fprint
: INTEGER): Object
;
774 i
:= 0; n
:= mod
.export
.num
;
775 WHILE (i
< n
) & (mod
.export
.obj
[i
].id
DIV 256 = 0) DO
776 IF mod
.export
.obj
[i
].offs
= fprint
THEN RETURN S
.VAL(Object
, S
.ADR(mod
.export
.obj
[i
])) END;
782 PROCEDURE ThisField
* (rec
: Type
; IN name
: ARRAY OF CHAR): Object
;
783 VAR n
, res
: INTEGER; p
: StrPtr
; obj
: Object
; m
: Module
; nn
: Utf8Name
;
785 StringToUtf8(name
, nn
, res
); ASSERT(res
= 0);
787 obj
:= S
.VAL(Object
, S
.ADR(rec
.fields
.obj
[0])); n
:= rec
.fields
.num
;
789 p
:= S
.VAL(StrPtr
, S
.ADR(m
.names
[obj
.id
DIV 256]));
790 IF p^
= nn
THEN RETURN obj
END;
791 DEC(n
); INC(S
.VAL(INTEGER, obj
), 16)
796 PROCEDURE ThisCommand
* (mod
: Module
; IN name
: ARRAY OF CHAR): Command
;
797 VAR x
: Object
; sig
: Signature
;
799 x
:= ThisObject(mod
, name
);
800 IF (x
# NIL) & (x
.id
MOD 16 = mProc
) THEN
801 sig
:= S
.VAL(Signature
, x
.struct
);
802 IF (sig
.retStruct
= NIL) & (sig
.num
= 0) THEN RETURN S
.VAL(Command
, mod
.procBase
+ x
.offs
) END
807 PROCEDURE ThisType
* (mod
: Module
; IN name
: ARRAY OF CHAR): Type
;
810 x
:= ThisObject(mod
, name
);
811 IF (x
# NIL) & (x
.id
MOD 16 = mTyp
) & (S
.VAL(INTEGER, x
.struct
) DIV 256 # 0) THEN
818 PROCEDURE TypeOf
* (IN rec
: ANYREC
): Type
;
820 RETURN S
.VAL(Type
, S
.TYP(rec
))
823 PROCEDURE LevelOf
* (t
: Type
): SHORTINT;
825 RETURN SHORT(t
.id
DIV 16 MOD 16)
828 PROCEDURE NewObj
* (VAR o
: S
.PTR
; t
: Type
);
831 IF t
.size
= -1 THEN o
:= NIL
833 i
:= 0; WHILE t
.ptroffs
[i
] >= 0 DO INC(i
) END;
834 IF t
.ptroffs
[i
+1] >= 0 THEN INC(S
.VAL(INTEGER, t
)) END; (* with interface pointers *)
835 o
:= S
.VAL(S
.PTR
, NewRec(S
.VAL(INTEGER, t
))) (* generic NEW *)
839 PROCEDURE GetModName
* (mod
: Module
; OUT name
: Name
);
842 Utf8ToString(mod
.name
, name
, res
); ASSERT(res
= 0)
845 PROCEDURE GetObjName
* (mod
: Module
; obj
: Object
; OUT name
: Name
);
846 VAR p
: StrPtr
; res
: INTEGER;
848 p
:= S
.VAL(StrPtr
, S
.ADR(mod
.names
[obj
.id
DIV 256]));
849 Utf8ToString(p^$
, name
, res
); ASSERT(res
= 0)
852 PROCEDURE GetTypeName
* (t
: Type
; OUT name
: Name
);
853 VAR p
: StrPtr
; res
: INTEGER;
855 p
:= S
.VAL(StrPtr
, S
.ADR(t
.mod
.names
[t
.id
DIV 256]));
856 Utf8ToString(p^$
, name
, res
); ASSERT(res
= 0)
859 PROCEDURE RegisterMod
* (mod
: Module
);
860 VAR i
: INTEGER; epoch
: time
.time_t
; tm
: time
.struct_tm
; ptm
: time
.Pstruct_tm
;
862 mod
.next
:= modList
; modList
:= mod
; mod
.refcnt
:= 0; INCL(mod
.opts
, dyn
); i
:= 0;
863 WHILE i
< mod
.nofimps
DO
864 IF mod
.imports
[i
] # NIL THEN INC(mod
.imports
[i
].refcnt
) END;
867 epoch
:= time
.time(NIL);
868 ptm
:= time
.localtime_r(epoch
, tm
);
870 mod
.loadTime
[0] := SHORT(tm
.tm_year
+ 1900);
871 mod
.loadTime
[1] := SHORT(tm
.tm_mon
+ 1);
872 mod
.loadTime
[2] := SHORT(tm
.tm_mday
);
873 mod
.loadTime
[3] := SHORT(tm
.tm_hour
);
874 mod
.loadTime
[4] := SHORT(tm
.tm_min
);
875 mod
.loadTime
[5] := SHORT(tm
.tm_sec
)
877 mod
.loadTime
[0] := 0;
878 mod
.loadTime
[1] := 0;
879 mod
.loadTime
[2] := 0;
880 mod
.loadTime
[3] := 0;
881 mod
.loadTime
[4] := 0;
884 IF ~
(init
IN mod
.opts
) THEN InitModule(mod
) END
889 PROCEDURE UnloadMod
* (mod
: Module
);
890 VAR i
: INTEGER; t
: Command
;
892 IF mod
.refcnt
= 0 THEN
893 t
:= mod
.term
; mod
.term
:= NIL;
894 IF t
# NIL THEN t() END; (* terminate module *)
896 WHILE i
< mod
.nofptrs
DO (* release global pointers *)
897 S
.PUT(mod
.varBase
+ mod
.ptrs
[i
], 0); INC(i
)
899 Collect
; (* call finalizers *)
901 WHILE i
< mod
.nofimps
DO (* release imported modules *)
902 IF mod
.imports
[i
] # NIL THEN DEC(mod
.imports
[i
].refcnt
) END;
906 IF dyn
IN mod
.opts
THEN (* release memory *)
907 InvalModMem(mod
.data
+ mod
.dsize
- mod
.refs
, mod
.refs
)
912 (* -------------------- dynamic procedure call --------------------- *)
914 PROCEDURE Call
* (adr
: INTEGER; sig
: Signature
; IN par
: ARRAY OF INTEGER; n
: INTEGER): LONGINT;
920 (* -------------------- reference information (portable) --------------------- *)
922 PROCEDURE RefCh (VAR ref
: INTEGER; OUT ch
: SHORTCHAR
);
924 S
.GET(ref
, ch
); INC(ref
)
927 PROCEDURE RefNum (VAR ref
: INTEGER; OUT x
: INTEGER);
928 VAR s
, n
: INTEGER; ch
: SHORTCHAR
;
930 s
:= 0; n
:= 0; RefCh(ref
, ch
);
931 WHILE ORD(ch
) >= 128 DO INC(n
, ASH(ORD(ch
) - 128, s
) ); INC(s
, 7); RefCh(ref
, ch
) END;
932 x
:= n
+ ASH(ORD(ch
) MOD 64 - ORD(ch
) DIV 64 * 64, s
)
935 PROCEDURE RefName (VAR ref
: INTEGER; OUT n
: Utf8Name
);
936 VAR i
: INTEGER; ch
: SHORTCHAR
;
938 i
:= 0; RefCh(ref
, ch
);
939 WHILE ch
# 0X
DO n
[i
] := ch
; INC(i
); RefCh(ref
, ch
) END;
943 PROCEDURE GetRefProc
* (VAR ref
: INTEGER; OUT adr
: INTEGER; OUT name
: Utf8Name
);
947 WHILE ch
>= 0FDX
DO (* skip variables *)
948 INC(ref
); RefCh(ref
, ch
);
949 IF ch
= 10X
THEN INC(ref
, 4) END;
950 RefNum(ref
, adr
); RefName(ref
, name
); S
.GET(ref
, ch
)
952 WHILE (ch
> 0X
) & (ch
< 0FCX
) DO (* skip source refs *)
953 INC(ref
); RefNum(ref
, adr
); S
.GET(ref
, ch
)
955 IF ch
= 0FCX
THEN INC(ref
); RefNum(ref
, adr
); RefName(ref
, name
)
960 PROCEDURE GetRefVar
* (VAR ref
: INTEGER; OUT mode
, form
: SHORTCHAR
; OUT desc
: Type
; OUT adr
: INTEGER; OUT name
: Utf8Name
);
962 S
.GET(ref
, mode
); desc
:= NIL;
964 mode
:= SHORT(CHR(ORD(mode
) - 0FCH
));
965 INC(ref
); RefCh(ref
, form
);
967 S
.GET(ref
, desc
); INC(ref
, 4); form
:= SHORT(CHR(16 + desc
.id
MOD 4))
969 RefNum(ref
, adr
); RefName(ref
, name
)
971 mode
:= 0X
; form
:= 0X
; adr
:= 0
975 PROCEDURE SourcePos
* (mod
: Module
; codePos
: INTEGER): INTEGER;
976 VAR ref
, pos
, ad
, d
: INTEGER; ch
: SHORTCHAR
; name
: Utf8Name
;
978 IF mod
# NIL THEN (* mf, 12.02.04 *)
979 ref
:= mod
.refs
; pos
:= 0; ad
:= 0; S
.GET(ref
, ch
);
981 WHILE (ch
> 0X
) & (ch
< 0FCX
) DO (* srcref: {dAdr,dPos} *)
982 INC(ad
, ORD(ch
)); INC(ref
); RefNum(ref
, d
);
983 IF ad
> codePos
THEN RETURN pos
END;
984 INC(pos
, d
); S
.GET(ref
, ch
)
986 IF ch
= 0FCX
THEN (* proc: 0FCX,Adr,Name *)
987 INC(ref
); RefNum(ref
, d
); RefName(ref
, name
); S
.GET(ref
, ch
);
988 IF (d
> codePos
) & (pos
> 0) THEN RETURN pos
END
990 WHILE ch
>= 0FDX
DO (* skip variables: Mode, Form, adr, Name *)
991 INC(ref
); RefCh(ref
, ch
);
992 IF ch
= 10X
THEN INC(ref
, 4) END;
993 RefNum(ref
, d
); RefName(ref
, name
); S
.GET(ref
, ch
)
1000 PROCEDURE LoadDll
* (IN name
: ARRAY OF CHAR; VAR ok
: BOOLEAN);
1001 VAR h
: ADDRESS
; file
: Utf8Name
; res
: INTEGER;
1003 StringToUtf8(name
, file
, res
);
1005 h
:= dlfcn
.dlopen(file
, dlfcn
.RTLD_LAZY
+ dlfcn
.RTLD_GLOBAL
);
1012 PROCEDURE ThisDllObj
* (mode
, fprint
: INTEGER; IN dll
, name
: ARRAY OF CHAR): INTEGER;
1013 VAR h
, p
: ADDRESS
; file
, sym
: Utf8Name
; res
: INTEGER; err
: dlfcn
.int
;
1015 StringToUtf8(dll
, file
, res
);
1017 h
:= dlfcn
.dlopen(file
, dlfcn
.RTLD_LAZY
+ dlfcn
.RTLD_GLOBAL
);
1019 StringToUtf8(name
, sym
, res
);
1021 p
:= dlfcn
.dlsym(h
, sym
)
1025 err
:= dlfcn
.dlclose(h
);
1026 ASSERT(err
= 0, 100)
1036 (* -------------------- garbage collector (portable) --------------------- *)
1038 PROCEDURE Mark (this
: Block
);
1039 VAR father
, son
: Block
; tag
: Type
; flag
, offset
, actual
: INTEGER;
1041 IF ~
ODD(S
.VAL(INTEGER, this
.tag
)) THEN
1044 INC(S
.VAL(INTEGER, this
.tag
));
1045 flag
:= S
.VAL(INTEGER, this
.tag
) MOD 4;
1046 tag
:= S
.VAL(Type
, S
.VAL(INTEGER, this
.tag
) - flag
);
1047 IF flag
>= 2 THEN actual
:= this
.first
; this
.actual
:= actual
1048 ELSE actual
:= S
.ADR(this
.last
)
1051 offset
:= tag
.ptroffs
[0];
1053 INC(S
.VAL(INTEGER, tag
), offset
+ 4); (* restore tag *)
1054 IF (flag
>= 2) & (actual
< this
.last
) & (offset
< -4) THEN (* next array element *)
1055 INC(actual
, tag
.size
); this
.actual
:= actual
1057 this
.tag
:= S
.VAL(Type
, S
.VAL(INTEGER, tag
) + flag
);
1058 IF father
= NIL THEN RETURN END;
1059 son
:= this
; this
:= father
;
1060 flag
:= S
.VAL(INTEGER, this
.tag
) MOD 4;
1061 tag
:= S
.VAL(Type
, S
.VAL(INTEGER, this
.tag
) - flag
);
1062 offset
:= tag
.ptroffs
[0];
1063 IF flag
>= 2 THEN actual
:= this
.actual
ELSE actual
:= S
.ADR(this
.last
) END;
1064 S
.GET(actual
+ offset
, father
); S
.PUT(actual
+ offset
, S
.ADR(son
.last
));
1065 INC(S
.VAL(INTEGER, tag
), 4)
1068 S
.GET(actual
+ offset
, son
);
1070 DEC(S
.VAL(INTEGER, son
), 4);
1071 IF ~
ODD(S
.VAL(INTEGER, son
.tag
)) THEN (* down *)
1072 this
.tag
:= S
.VAL(Type
, S
.VAL(INTEGER, tag
) + flag
);
1073 S
.PUT(actual
+ offset
, father
); father
:= this
; this
:= son
;
1077 INC(S
.VAL(INTEGER, tag
), 4)
1084 PROCEDURE MarkGlobals
;
1085 VAR m
: Module
; i
, p
: INTEGER;
1089 IF m
.refcnt
>= 0 THEN
1091 WHILE i
< m
.nofptrs
DO
1092 S
.GET(m
.varBase
+ m
.ptrs
[i
], p
); INC(i
);
1093 IF p
# 0 THEN Mark(S
.VAL(Block
, p
- 4)) END
1100 PROCEDURE Next (b
: Block
): Block
; (* next block in same cluster *)
1103 S
.GET(S
.VAL(INTEGER, b
.tag
) DIV 4 * 4, size
);
1104 IF ODD(S
.VAL(INTEGER, b
.tag
) DIV 2) THEN INC(size
, b
.last
- S
.ADR(b
.last
)) END;
1105 RETURN S
.VAL(Block
, S
.VAL(INTEGER, b
) + (size
+ 19) DIV 16 * 16)
1108 PROCEDURE CheckCandidates
;
1109 (* pre: nofcand > 0 *)
1110 VAR i
, j
, h
, p
, end
: INTEGER; c
: Cluster
; blk
, next
: Block
;
1112 (* sort candidates (shellsort) *)
1113 h
:= 1; REPEAT h
:= h
*3 + 1 UNTIL h
> nofcand
;
1114 REPEAT h
:= h
DIV 3; i
:= h
;
1115 WHILE i
< nofcand
DO p
:= candidates
[i
]; j
:= i
;
1116 WHILE (j
>= h
) & (candidates
[j
-h
] > p
) DO
1117 candidates
[j
] := candidates
[j
-h
]; j
:= j
-h
1119 candidates
[j
] := p
; INC(i
)
1125 blk
:= S
.VAL(Block
, S
.VAL(INTEGER, c
) + 12);
1126 end
:= S
.VAL(INTEGER, blk
) + (c
.size
- 12) DIV 16 * 16;
1127 WHILE candidates
[i
] < S
.VAL(INTEGER, blk
) DO
1129 IF i
= nofcand
THEN RETURN END
1131 WHILE S
.VAL(INTEGER, blk
) < end
DO
1133 IF candidates
[i
] < S
.VAL(INTEGER, next
) THEN
1134 IF (S
.VAL(INTEGER, blk
.tag
) # S
.ADR(blk
.last
)) (* not a free block *)
1135 & (~strictStackSweep
OR (candidates
[i
] = S
.ADR(blk
.last
))) THEN
1140 IF i
= nofcand
THEN RETURN END
1141 UNTIL candidates
[i
] >= S
.VAL(INTEGER, next
)
1143 IF (S
.VAL(INTEGER, blk
.tag
) MOD 4 = 0) & (S
.VAL(INTEGER, blk
.tag
) # S
.ADR(blk
.last
))
1144 & (blk
.tag
.base
[0] = NIL) & (blk
.actual
> 0) THEN (* referenced interface record *)
1151 END CheckCandidates
;
1153 PROCEDURE MarkLocals
;
1154 VAR sp
, p
, min
, max
: INTEGER; c
: Cluster
;
1156 sp
:= S
.ADR(sp
); nofcand
:= 0; c
:= root
;
1157 WHILE c
.next
# NIL DO c
:= c
.next
END;
1158 min
:= S
.VAL(INTEGER, root
); max
:= S
.VAL(INTEGER, c
) + c
.size
;
1159 WHILE sp
< baseStack
DO
1161 IF (p
> min
) & (p
< max
) & (~strictStackSweep
OR (p
MOD 16 = 0)) THEN
1162 candidates
[nofcand
] := p
; INC(nofcand
);
1163 IF nofcand
= LEN(candidates
) - 1 THEN CheckCandidates
; nofcand
:= 0 END
1167 candidates
[nofcand
] := max
; INC(nofcand
); (* ensure complete scan for interface mark*)
1168 IF nofcand
> 0 THEN CheckCandidates
END
1171 PROCEDURE MarkFinObj
;
1174 wouldFinalize
:= FALSE
;
1177 IF ~
ODD(S
.VAL(INTEGER, f
.blk
.tag
)) THEN wouldFinalize
:= TRUE
END;
1182 WHILE f
# NIL DO IF ~
ODD(S
.VAL(INTEGER, f
.blk
.tag
)) THEN wouldFinalize
:= TRUE
END;
1188 PROCEDURE CheckFinalizers
;
1189 VAR f
, g
, h
, k
: FList
;
1191 f
:= finalizers
; g
:= NIL;
1192 IF hotFinalizers
= NIL THEN k
:= NIL
1195 WHILE k
.next
# NIL DO k
:= k
.next
END
1198 h
:= f
; f
:= f
.next
;
1199 IF ~
ODD(S
.VAL(INTEGER, h
.blk
.tag
)) THEN
1200 IF g
= NIL THEN finalizers
:= f
ELSE g
.next
:= f
END;
1201 IF k
= NIL THEN hotFinalizers
:= h
ELSE k
.next
:= h
END;
1202 k
:= h
; h
.next
:= NIL
1207 WHILE h
# NIL DO Mark(h
.blk
); h
:= h
.next
END
1208 END CheckFinalizers
;
1210 PROCEDURE ExecFinalizer (a
, b
, c
: INTEGER);
1211 VAR f
: FList
; fin
: PROCEDURE(this
: ANYPTR
);
1213 f
:= S
.VAL(FList
, a
);
1214 S
.GET(S
.VAL(INTEGER, f
.blk
.tag
) - 4, fin
); (* method 0 *)
1215 IF (fin
# NIL) & (f
.blk
.tag
.mod
.refcnt
>= 0) THEN fin(S
.VAL(ANYPTR
, S
.ADR(f
.blk
.last
))) END;
1218 PROCEDURE^ Try
* (h
: TryHandler
; a
, b
, c
: INTEGER); (* COMPILER DEPENDENT *)
1220 PROCEDURE CallFinalizers
;
1223 WHILE hotFinalizers
# NIL DO
1224 f
:= hotFinalizers
; hotFinalizers
:= hotFinalizers
.next
;
1225 Try(ExecFinalizer
, S
.VAL(INTEGER, f
), 0, 0)
1227 wouldFinalize
:= FALSE
1230 PROCEDURE Insert (blk
: FreeBlock
; size
: INTEGER); (* insert block in free list *)
1233 blk
.size
:= size
- 4; blk
.tag
:= S
.VAL(Type
, S
.ADR(blk
.size
));
1234 i
:= MIN(N
- 1, (blk
.size
DIV 16));
1235 blk
.next
:= free
[i
]; free
[i
] := blk
1238 PROCEDURE Sweep (dealloc
: BOOLEAN);
1239 VAR cluster
, last
, c
: Cluster
; blk
, next
: Block
; fblk
, b
, t
: FreeBlock
; end
, i
: INTEGER;
1241 cluster
:= root
; last
:= NIL; allocated
:= 0;
1243 REPEAT DEC(i
); free
[i
] := sentinel
UNTIL i
= 0;
1244 WHILE cluster
# NIL DO
1245 blk
:= S
.VAL(Block
, S
.VAL(INTEGER, cluster
) + 12);
1246 end
:= S
.VAL(INTEGER, blk
) + (cluster
.size
- 12) DIV 16 * 16;
1248 WHILE S
.VAL(INTEGER, blk
) < end
DO
1250 IF ODD(S
.VAL(INTEGER, blk
.tag
)) THEN
1252 Insert(fblk
, S
.VAL(INTEGER, blk
) - S
.VAL(INTEGER, fblk
));
1255 DEC(S
.VAL(INTEGER, blk
.tag
)); (* unmark *)
1256 INC(allocated
, S
.VAL(INTEGER, next
) - S
.VAL(INTEGER, blk
))
1257 ELSIF fblk
= NIL THEN
1258 fblk
:= S
.VAL(FreeBlock
, blk
)
1262 IF dealloc
& (S
.VAL(INTEGER, fblk
) = S
.VAL(INTEGER, cluster
) + 12) THEN (* deallocate cluster *)
1263 c
:= cluster
; cluster
:= cluster
.next
;
1264 IF last
= NIL THEN root
:= cluster
ELSE last
.next
:= cluster
END;
1267 IF fblk
# NIL THEN Insert(fblk
, end
- S
.VAL(INTEGER, fblk
)) END;
1268 last
:= cluster
; cluster
:= cluster
.next
1271 (* reverse free list *)
1275 b
:= free
[i
]; fblk
:= sentinel
;
1276 WHILE b
# sentinel
DO t
:= b
; b
:= t
.next
; t
.next
:= fblk
; fblk
:= t
END;
1284 CallFinalizers
; (* trap cleanup *)
1293 PROCEDURE FastCollect
*;
1303 PROCEDURE WouldFinalize
* (): BOOLEAN;
1305 RETURN wouldFinalize
1308 (* --------------------- memory allocation (portable) -------------------- *)
1310 PROCEDURE OldBlock (size
: INTEGER): FreeBlock
; (* size MOD 16 = 0 *)
1311 VAR b
, l
: FreeBlock
; s
, i
: INTEGER;
1314 i
:= MIN(N
- 1, s
DIV 16);
1315 WHILE (i
# N
- 1) & (free
[i
] = sentinel
) DO INC(i
) END;
1316 b
:= free
[i
]; l
:= NIL;
1317 WHILE b
.size
< s
DO l
:= b
; b
:= b
.next
END;
1318 IF b
# sentinel
THEN
1319 IF l
= NIL THEN free
[i
] := b
.next
ELSE l
.next
:= b
.next
END
1325 PROCEDURE LastBlock (limit
: INTEGER): FreeBlock
; (* size MOD 16 = 0 *)
1326 VAR b
, l
: FreeBlock
; s
, i
: INTEGER;
1331 b
:= free
[i
]; l
:= NIL;
1332 WHILE (b
# sentinel
) & (S
.VAL(INTEGER, b
) + b
.size
# s
) DO l
:= b
; b
:= b
.next
END;
1333 IF b
# sentinel
THEN
1334 IF l
= NIL THEN free
[i
] := b
.next
ELSE l
.next
:= b
.next
END
1338 UNTIL (b
# NIL) OR (i
= N
);
1342 PROCEDURE NewBlock (size
: INTEGER): Block
;
1343 VAR tsize
, a
, s
: INTEGER; b
: FreeBlock
; new
, c
: Cluster
; r
: Reducer
;
1345 ASSERT(size
>= 0, 20);
1346 IF size
> MAX(INTEGER) - 19 THEN RETURN NIL END;
1347 tsize
:= (size
+ 19) DIV 16 * 16;
1348 b
:= OldBlock(tsize
); (* 1) search for free block *)
1350 FastCollect
; b
:= OldBlock(tsize
); (* 2) collect *)
1352 Collect
; b
:= OldBlock(tsize
); (* 2a) fully collect *)
1355 AllocHeapMem(tsize
+ 12, new
); (* 3) allocate new cluster *)
1357 IF (root
= NIL) OR (S
.VAL(INTEGER, new
) < S
.VAL(INTEGER, root
)) THEN
1358 new
.next
:= root
; root
:= new
1361 WHILE (c
.next
# NIL) & (S
.VAL(INTEGER, new
) > S
.VAL(INTEGER, c
.next
)) DO c
:= c
.next
END;
1362 new
.next
:= c
.next
; c
.next
:= new
1364 b
:= S
.VAL(FreeBlock
, S
.VAL(INTEGER, new
) + 12);
1365 b
.size
:= (new
.size
- 12) DIV 16 * 16 - 4
1367 RETURN NIL (* 4) give up *)
1372 a
:= b
.size
+ 4 - tsize
;
1373 IF a
> 0 THEN Insert(S
.VAL(FreeBlock
, S
.VAL(INTEGER, b
) + tsize
), a
) END;
1374 IF size
> 0 THEN Erase(S
.ADR(b
.size
), (size
+ 3) DIV 4) END;
1375 INC(allocated
, tsize
);
1376 RETURN S
.VAL(Block
, b
)
1379 PROCEDURE Allocated
* (): INTEGER;
1384 PROCEDURE Used
* (): INTEGER;
1389 PROCEDURE Root
* (): INTEGER;
1391 RETURN S
.VAL(INTEGER, root
)
1394 (* -------------------- Trap Handling --------------------- *)
1396 PROCEDURE [code
] GetDLink (): DLink
"(Kernel_DLink)SYSTEM_dlink";
1397 PROCEDURE [code
] SetDLink (dl
: DLink
) "SYSTEM_dlink = (SYSTEM_DLINK*)dl";
1399 PROCEDURE Start
* (code
: Command
);
1400 VAR res
: setjmp
.int
; dl
: DLink
;
1403 baseStack
:= S
.ADR(code
); (* XXX: expected that target uses one stack *)
1404 startDLink
:= GetDLink();
1405 res
:= setjmp
.sigsetjmp(startEnv
, 1);
1409 PROCEDURE Quit
* (exitCode
: INTEGER);
1410 VAR m
: Module
; term
: Command
; t
: BOOLEAN;
1412 trapViewer
:= NIL; trapChecker
:= NIL; restart
:= NIL;
1413 t
:= terminating
; terminating
:= TRUE
; m
:= modList
;
1414 WHILE m
# NIL DO (* call terminators *)
1415 IF ~static
OR ~t
THEN
1416 term
:= m
.term
; m
.term
:= NIL;
1417 IF term
# NIL THEN term() END
1422 hotFinalizers
:= finalizers
; finalizers
:= NIL;
1424 stdlib
.exit(exitCode
)
1427 PROCEDURE FatalError
* (id
: INTEGER; str
: ARRAY OF CHAR);
1428 VAR res
: stdio
.int
; title
: ARRAY 16 OF CHAR; text
: ARRAY 256 OF SHORTCHAR
;
1430 title
:= "Error xy";
1431 title
[6] := CHR(id
DIV 10 + ORD("0"));
1432 title
[7] := CHR(id
MOD 10 + ORD("0"));
1433 res
:= unistd
.write(2, S
.ADR(title
), 8);
1437 PROCEDURE DefaultTrapViewer
;
1438 VAR out
: ARRAY 256 OF SHORTCHAR
; c
, len
: INTEGER; res
: unistd
.int
; dl
: DLink
;
1440 PROCEDURE WriteString (IN s
: ARRAY OF SHORTCHAR
);
1444 WHILE (len
< LEN(out
) - 1) & (s
[i
] # 0X
) DO out
[len
] := s
[i
]; INC(i
); INC(len
) END
1447 PROCEDURE WriteHex (x
, n
: INTEGER);
1450 IF len
+ n
< LEN(out
) THEN
1453 y
:= x
MOD 16; x
:= x
DIV 16;
1454 IF y
> 9 THEN y
:= y
+ (ORD("A") - ORD("0") - 10) END;
1455 out
[i
] := SHORT(CHR(y
+ ORD("0"))); DEC(i
)
1463 IF len
< LEN(out
) - 1 THEN out
[len
] := 0AX
; INC(len
) END
1468 WriteString("====== ");
1469 IF err
= 129 THEN WriteString("invalid with")
1470 ELSIF err
= 130 THEN WriteString("invalid case")
1471 ELSIF err
= 131 THEN WriteString("function without return")
1472 ELSIF err
= 132 THEN WriteString("type guard")
1473 ELSIF err
= 133 THEN WriteString("implied type guard")
1474 ELSIF err
= 134 THEN WriteString("value out of range")
1475 ELSIF err
= 135 THEN WriteString("index out of range")
1476 ELSIF err
= 136 THEN WriteString("string too long")
1477 ELSIF err
= 137 THEN WriteString("stack overflow")
1478 ELSIF err
= 138 THEN WriteString("integer overflow")
1479 ELSIF err
= 139 THEN WriteString("division by zero")
1480 ELSIF err
= 140 THEN WriteString("infinite real result")
1481 ELSIF err
= 141 THEN WriteString("real underflow")
1482 ELSIF err
= 142 THEN WriteString("real overflow")
1483 ELSIF err
= 143 THEN WriteString("undefined real result")
1484 ELSIF err
= 144 THEN WriteString("not a number")
1485 ELSIF err
= 200 THEN WriteString("keyboard interrupt")
1486 ELSIF err
= 201 THEN WriteString("NIL dereference")
1487 ELSIF err
= 202 THEN WriteString("illegal instruction: ");
1489 ELSIF err
= 203 THEN WriteString("illegal memory read [ad = ");
1490 WriteHex(val
, 8); WriteString("]")
1491 ELSIF err
= 204 THEN WriteString("illegal memory write [ad = ");
1492 WriteHex(val
, 8); WriteString("]")
1493 ELSIF err
= 205 THEN WriteString("illegal execution [ad = ");
1494 WriteHex(val
, 8); WriteString("]")
1495 ELSIF err
= 257 THEN WriteString("out of memory")
1496 ELSIF err
= 10001H
THEN WriteString("bus error")
1497 ELSIF err
= 10002H
THEN WriteString("address error")
1498 ELSIF err
= 10007H
THEN WriteString("fpu error")
1499 ELSIF err
< 0 THEN WriteString("exception #"); WriteHex(-err
, 2)
1500 ELSE err
:= err
DIV 100 * 256 + err
DIV 10 MOD 10 * 16 + err
MOD 10;
1501 WriteString("trap #"); WriteHex(err
, 3)
1503 WriteString(" ======");
1506 (* skip Kernel.DefaultTrapViewer & Kernel.Trap/Kernel.TrapHandler *)
1508 WHILE (c
> 0) & (dl
# NIL) DO
1514 WHILE (c
> 0) & (dl
# NIL) DO
1515 WriteString("- "); WriteString(dl
.name$
); WriteLn
;
1520 res
:= unistd
.write(2, S
.ADR(out
), len
)
1521 END DefaultTrapViewer
;
1523 PROCEDURE TrapCleanup
;
1526 WHILE trapStack
# NIL DO
1527 t
:= trapStack
; trapStack
:= trapStack
.next
; t
.Cleanup
1529 IF (trapChecker
# NIL) & (err
# 128) THEN trapChecker
END
1532 PROCEDURE SetTrapGuard
* (on
: BOOLEAN);
1537 PROCEDURE Try
* (h
: TryHandler
; a
, b
, c
: INTEGER);
1538 VAR oldIsTry
: BOOLEAN; oldTryEnv
: setjmp
.jmp_buf
; oldTryDLink
: DLink
; res
: setjmp
.int
;
1540 oldIsTry
:= isTry
; oldTryEnv
:= tryEnv
; oldTryDLink
:= tryDLink
;
1541 isTry
:= TRUE
; tryDLink
:= GetDLink();
1542 res
:= setjmp
._setjmp(tryEnv
);
1543 IF res
= 0 THEN h(a
, b
, c
) END;
1544 isTry
:= oldIsTry
; tryEnv
:= oldTryEnv
; tryDLink
:= oldTryDLink
1547 PROCEDURE Trap
* (n
: INTEGER);
1551 IF ~secondTrap
THEN trapped
:= FALSE
; secondTrap
:= TRUE
END
1553 IF n
>= 0 THEN err
:= n
1554 ELSE err
:= -n
+ 128
1556 pc
:= 0; sp
:= 0; fp
:= 0; stack
:= 0; val
:= 0;
1562 setjmp
._longjmp(tryEnv
, 1)
1564 IF (err
= 128) OR (err
= 200) & ~intTrap
THEN (* do nothing *)
1565 ELSIF (trapViewer
# NIL) & (restart
# NIL) & ~trapped
& ~guarded
THEN
1566 trapped
:= TRUE
; trapViewer()
1567 ELSE DefaultTrapViewer
1569 trapped
:= FALSE
; secondTrap
:= FALSE
;
1570 IF restart
# NIL THEN
1571 SetDLink(startDLink
);
1572 setjmp
.siglongjmp(startEnv
, 1)
1577 PROCEDURE [ccall
] TrapHandler (signo
: signal
.int
; IN _info
: signal
.siginfo_t
; context
: ADDRESS
);
1578 TYPE SigInfo
= POINTER [untagged
] TO signal
._siginfo_t
;
1579 VAR res
: signal
.int
; info
: SigInfo
;
1581 info
:= S
.VAL(SigInfo
, S
.ADR(_info
)); (* !!! hack for CPfront *)
1584 IF ~secondTrap
THEN trapped
:= FALSE
; secondTrap
:= TRUE
END
1586 err
:= -signo
; pc
:= 0; sp
:= 0; fp
:= 0; stack
:= 0; val
:= 0;
1590 val
:= info
.si_code
;
1591 CASE info
.si_code
OF
1592 | signal
.FPE_INTDIV
: err
:= 139 (* division by zero *)
1593 | signal
.FPE_INTOVF
: err
:= 138 (* integer overflow *)
1594 | signal
.FPE_FLTDIV
: err
:= 140 (* fpu: division by zero *)
1595 | signal
.FPE_FLTOVF
: err
:= 142 (* fpu: overflow *)
1596 | signal
.FPE_FLTUND
: err
:= 141 (* fpu: underflow *)
1597 (* !!! | signal.FPE_FLTRES: err := ??? (* fpu: *) *)
1598 | signal
.FPE_FLTINV
: err
:= 143 (* val := opcode *) (* fpu: invalid op *)
1599 (* !!! | signal.FPE_FLTSUB: err := ??? (* fpu: *) *)
1603 val
:= info
.si_code
;
1604 err
:= 200 (* keyboard interrupt *)
1606 val
:= info
.si_addr
;
1607 err
:= 203 (* illigal read *)
1609 val
:= info
.si_addr
;
1610 err
:= 10001H (* bus error *)
1613 err
:= 202; (* illigal instruction *)
1614 IF IsReadable(pc
, pc
+ 4) THEN
1616 (* !!! err := halt code *)
1625 setjmp
._longjmp(tryEnv
, 1)
1627 IF (err
= 128) OR (err
= 200) & ~intTrap
THEN (* do nothing *)
1628 ELSIF (trapViewer
# NIL) & (restart
# NIL) & ~trapped
& ~guarded
THEN
1629 trapped
:= TRUE
; trapViewer()
1630 ELSE DefaultTrapViewer
1632 trapped
:= FALSE
; secondTrap
:= FALSE
;
1633 IF restart
# NIL THEN
1634 SetDLink(startDLink
);
1635 setjmp
.siglongjmp(startEnv
, 1)
1640 (* -------------------- Initialization --------------------- *)
1642 PROCEDURE InstallTrap (signo
: signal
.int
);
1643 VAR act
: signal
._struct_sigaction
; (* !!! CPfront hack *) res
: signal
.int
;
1645 act
.sa_handler
:= NIL;
1646 res
:= signal
.sigemptyset(act
.sa_mask
);
1647 act
.sa_flags
:= signal
.SA_NODEFER
+ signal
.SA_SIGINFO
;
1648 act
.sa_sigaction
:= TrapHandler
;
1649 res
:= signal
.sigaction(signo
, S
.VAL(signal
.struct_sigaction
, act
), NIL);
1652 PROCEDURE InstallTrapVectors
;
1654 InstallTrap(signal
.SIGFPE
);
1655 InstallTrap(signal
.SIGINT
);
1656 InstallTrap(signal
.SIGSEGV
);
1657 InstallTrap(signal
.SIGBUS
);
1658 InstallTrap(signal
.SIGILL
)
1659 END InstallTrapVectors
;
1661 PROCEDURE RemoveTrapVectors
;
1662 END RemoveTrapVectors
;
1668 baseStack
:= S
.ADR(i
); (* XXX *)
1669 pagesize
:= unistd
.sysconf(unistd
._SC_PAGESIZE
);
1672 allocated
:= 0; total
:= 0; used
:= 0;
1673 sentinelBlock
.size
:= MAX(INTEGER);
1674 sentinel
:= S
.ADR(sentinelBlock
);
1676 REPEAT DEC(i
); free
[i
] := sentinel
UNTIL i
= 0;
1684 InitModule(modList
);
1685 IF ~inDll
THEN Quit(1) END
1689 PROCEDURE [code
] SYSTEM_argCount (): INTEGER "SYSTEM_argCount";
1690 PROCEDURE [code
] SYSTEM_argVector (): ArrStrPtr
"(Kernel_ArrStrPtr)SYSTEM_argVector";
1691 PROCEDURE [code
] SYSTEM_modlist (): Module
"(Kernel_Module)SYSTEM_modlist";
1694 IF modList
= NIL THEN (* only once *)
1695 argc
:= SYSTEM_argCount();
1696 argv
:= SYSTEM_argVector();
1697 modList
:= SYSTEM_modlist();
1698 static
:= init
IN modList
.opts
;
1699 inDll
:= dll
IN modList
.opts
;
1703 IF ~terminating
THEN
1704 terminating
:= TRUE
;