c771c14b0f
heap overflow while storing db term. trust_fail should be preceeded by an sla. make sla point to current pred, get rid of current pred in bitmap. git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@374 b08c6af1-5177-4d33-ba66-4b1c6b8b522a
551 lines
18 KiB
Plaintext
551 lines
18 KiB
Plaintext
/*************************************************************************
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* *
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* YAP Prolog %W% %G%
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* *
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* Yap Prolog was developed at NCCUP - Universidade do Porto *
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* *
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* Copyright L.Damas, V.S.Costa and Universidade do Porto 1985-1997 *
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* *
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**************************************************************************
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* *
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* File: YAtom.h.m4 *
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* Last rev: 19/2/88 *
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* mods: *
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* comments: atom properties header file for YAP *
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* *
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*************************************************************************/
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/* This code can only be defined *after* including Regs.h!!! */
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#if USE_OFFSETS
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Constructor(Atom, Abs, AtomEntry *, p, Addr(p) - AtomBase)
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Destructor(Atom, Rep, AtomEntry *, a, AtomBase + Unsigned(a))
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#else
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Constructor(Atom, Abs, AtomEntry *, p, p)
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Destructor(Atom, Rep, AtomEntry *, a, a)
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#endif
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#if USE_OFFSETS_IN_PROPS
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Constructor(Prop,Abs,PropEntry *,p,Addr(p)-AtomBase)
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Destructor(Prop,Rep,PropEntry *,p,AtomBase+Unsigned(p))
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#else
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Constructor(Prop,Abs,PropEntry *,p,p)
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Destructor(Prop,Rep,PropEntry *,p,p)
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#endif
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#if USE_OFFSETS_IN_PROPS
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Destructor(Prop, RepFunctor, FunctorEntry *, p, AtomBase + Unsigned(p))
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Constructor(Prop, AbsFunctor, FunctorEntry *, p, Addr(p)-AtomBase)
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#else
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Destructor(Prop, RepFunctor, FunctorEntry *, p, p)
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Constructor(Prop, AbsFunctor, FunctorEntry *, p, p)
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#endif
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Inline(ArityOfFunctor, Int, Functor, Fun, ((FunctorEntry *)Fun)->ArityOfFE)
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Inline(NameOfFunctor, Atom, Functor, Fun, ((FunctorEntry *)Fun)->NameOfFE)
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Inline(IsFunctorProperty, PropFlags, int, flags, (flags == FunctorProperty) )
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/* summary of property codes used
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00 00 predicate entry
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80 00 db property
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bb 00 functor entry
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ff df sparse functor
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ff ex arithmetic property
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ff f7 array
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ff fa module property
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ff fb blackboard property
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ff fc value property
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ff ff op property
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*/
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/* Module property */
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typedef struct {
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Prop NextOfPE; /* used to chain properties */
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PropFlags KindOfPE; /* kind of property */
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SMALLUNSGN IndexOfMod; /* indec in module table */
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} ModEntry;
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#if USE_OFFSETS_IN_PROPS
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Destructor(Prop,RepMod,ModEntry *,p, AtomBase + Unsigned(p))
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Constructor(Prop,AbsMod,ModEntry *,p,Addr(p)-AtomBase)
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#else
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Destructor(Prop,RepMod,ModEntry *,p,p)
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Constructor(Prop,AbsMod,ModEntry *,p,p)
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#endif
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#define ModProperty ((PropFlags)0xfffa)
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Inline(IsModProperty, PropFlags, int, flags, (flags == ModProperty))
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/* operator property entry structure */
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typedef struct {
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Prop NextOfPE; /* used to chain properties */
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PropFlags KindOfPE; /* kind of property */
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#if defined(YAPOR) || defined(THREADS)
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rwlock_t OpRWLock; /* a read-write lock to protect the entry */
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#endif
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BITS16 Prefix, Infix, Posfix; /* precedences */
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} OpEntry;
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#if USE_OFFSETS_IN_PROPS
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Destructor(Prop,RepOp,OpEntry *,p, AtomBase + Unsigned(p))
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Constructor(Prop,AbsOp,OpEntry *,p,Addr(p)-AtomBase)
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#else
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Destructor(Prop,RepOp,OpEntry *,p,p)
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Constructor(Prop,AbsOp,OpEntry *,p,p)
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#endif
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#define OpProperty ((PropFlags)0xffff)
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Inline(IsOpProperty, PropFlags, int, flags, (flags == OpProperty) )
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/* defines related to operator specifications */
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#define MaskPrio 0x0fff
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#define DcrlpFlag 0x1000
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#define DcrrpFlag 0x2000
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typedef union arith_ret *eval_ret;
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/* expression property entry structure */
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typedef struct {
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Prop NextOfPE; /* used to chain properties */
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PropFlags KindOfPE; /* kind of property */
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unsigned int ArityOfEE;
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BITS16 ENoOfEE;
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BITS16 FlagsOfEE;
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/* operations that implement the expression */
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union {
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blob_type (*constant)(eval_ret);
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blob_type (*unary)(Term, eval_ret);
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blob_type (*binary)(Term, Term, eval_ret);
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} FOfEE;
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} ExpEntry;
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#if USE_OFFSETS_IN_PROPS
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Destructor(Prop,RepExp,ExpEntry *,p, AtomBase + Unsigned(p))
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Constructor(Prop,AbsExp,ExpEntry *,p,Addr(p)-AtomBase)
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#else
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Destructor(Prop,RepExp,ExpEntry *,p,p)
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Constructor(Prop,AbsExp,ExpEntry *,p,p)
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#endif
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#define ExpProperty 0xffe0
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/* only unary and binary expressions are acceptable */
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Inline(IsExpProperty, PropFlags, int, flags, (flags == ExpProperty) )
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/* value property entry structure */
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typedef struct {
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Prop NextOfPE; /* used to chain properties */
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PropFlags KindOfPE; /* kind of property */
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#if defined(YAPOR) || defined(THREADS)
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rwlock_t VRWLock; /* a read-write lock to protect the entry */
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#endif
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Term ValueOfVE; /* (atomic) value associated with the atom */
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} ValEntry;
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#if USE_OFFSETS_IN_PROPS
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Destructor(Prop,RepVal,ValEntry *,p, AtomBase + Unsigned(p))
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Constructor(Prop,AbsVal,ValEntry *,p,Addr(p)-AtomBase)
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#else
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Destructor(Prop,RepVal,ValEntry *,p,p)
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Constructor(Prop,AbsVal,ValEntry *,p,p)
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#endif
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#define ValProperty ((PropFlags)0xfffc)
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Inline(IsValProperty, PropFlags, int, flags, (flags == ValProperty) )
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/* predicate property entry structure */
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/* BasicPreds are things like var, nonvar, atom ...which are implemented
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through dedicated machine instructions. In this case the 8 lower
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bits of PredFlags are used to hold the machine instruction code
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for the pred.
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C_Preds are things write, read, ... implemented in C. In this case
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CodeOfPred holds the address of the correspondent C-function.
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*/
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typedef enum {
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CutTransparentPredFlag = 0x800000L, /* ! should ! across */
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SourcePredFlag = 0x400000L, /* static predicate with source declaration */
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MetaPredFlag = 0x200000L, /* predicate subject to a meta declaration */
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SyncPredFlag = 0x100000L, /* has to synch before it can execute*/
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UserCPredFlag = 0x080000L, /* CPred defined by the user */
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MultiFileFlag = 0x040000L, /* is multi-file */
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FastPredFlag = 0x020000L, /* is "compiled" */
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TestPredFlag = 0x010000L, /* is a test (optim. comit) */
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BasicPredFlag = 0x008000L, /* inline */
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StandardPredFlag= 0x004000L, /* system predicate */
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DynamicPredFlag= 0x002000L, /* dynamic predicate */
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CPredFlag = 0x001000L, /* written in C */
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SafePredFlag = 0x000800L, /* does not alter arguments */
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CompiledPredFlag= 0x000400L, /* is static */
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IndexedPredFlag= 0x000200L, /* has indexing code */
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SpiedPredFlag = 0x000100L, /* is a spy point */
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BinaryTestPredFlag=0x000080L, /* test predicate. */
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#ifdef TABLING
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TabledPredFlag = 0x000040L, /* is tabled */
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#endif /* TABLING */
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#ifdef YAPOR
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SequentialPredFlag=0x000020L, /* may not create par. choice points!*/
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#endif /* YAPOR */
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ProfiledPredFlag = 0x000010L, /* pred is being profiled */
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LogUpdatePredFlag= 0x000008L /* dynamic predicate with log. upd. sem.*/
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} pred_flag;
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/* profile data */
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typedef struct {
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#if defined(YAPOR) || defined(THREADS)
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lockvar lock; /* a simple lock to protect this entry */
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#endif
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Int NOfEntries; /* nbr of times head unification succeeded*/
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Int NOfHeadSuccesses; /* nbr of times head unification succeeded*/
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Int NOfRetries; /* nbr of times a clause for the pred
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was retried */
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} profile_data;
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typedef struct pred_entry {
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Prop NextOfPE; /* used to chain properties */
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PropFlags KindOfPE; /* kind of property */
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unsigned int ArityOfPE; /* arity of property */
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CELL PredFlags;
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CODEADDR CodeOfPred; /* code address */
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CODEADDR TrueCodeOfPred; /* if needing to spy or to lock */
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Functor FunctorOfPred; /* functor for Predicate */
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CODEADDR FirstClause, LastClause;
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Atom OwnerFile; /* File where the predicate was defined */
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struct pred_entry *NextPredOfModule; /* next pred for same module */
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#if defined(YAPOR) || defined(THREADS)
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rwlock_t PRWLock; /* a simple lock to protect this entry */
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#endif
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#ifdef TABLING
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tab_ent_ptr TableOfPred;
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#endif /* TABLING */
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SMALLUNSGN ModuleOfPred; /* module for this definition */
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OPCODE OpcodeOfPred; /* undefcode, indexcode, spycode, .... */
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profile_data StatisticsForPred; /* enable profiling for predicate */
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SMALLUNSGN StateOfPred; /* actual state of predicate */
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} PredEntry;
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#define PEProp ((PropFlags)(0x0000))
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#if USE_OFFSETS_IN_PROPS
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Destructor(Prop,RepPred,PredEntry *,p, AtomBase + Unsigned(p))
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Constructor(Prop,AbsPred,PredEntry *,p,Addr(p)-AtomBase)
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#else
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Destructor(Prop,RepPred,PredEntry *,p,p)
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Constructor(Prop,AbsPred,PredEntry *,p,p)
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#endif
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Inline(IsPredProperty, PropFlags, int, flags, (flags == PEProp) )
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/********* maximum number of C-written predicates and cmp funcs ******************/
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#define MAX_C_PREDS 360
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#define MAX_CMP_FUNCS 20
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typedef struct {
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PredEntry *p;
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CmpPredicate f;
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} cmp_entry;
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extern CPredicate c_predicates[MAX_C_PREDS];
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extern cmp_entry cmp_funcs[MAX_CMP_FUNCS];
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/* Flags for code or dbase entry */
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/* There are several flags for code and data base entries */
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typedef enum {
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GcFoundMask = 0x10000, /* informs this is a dynamic predicate */
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DynamicMask = 0x8000, /* informs this is a dynamic predicate */
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InUseMask = 0x4000, /* informs this block is being used */
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ErasedMask = 0x2000, /* informs this block has been erased */
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IndexMask = 0x1000, /* informs this is indexing code */
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DBClMask = 0x0800, /* informs this is a data base structure */
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LogUpdRuleMask= 0x0400, /* informs the code is for a log upd rule with env */
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LogUpdMask = 0x0200, /* informs this is a logic update index. */
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StaticMask = 0x0100, /* dealing with static predicates */
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SpiedMask = 0x0080 /* this predicate is being spied */
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/* other flags belong to DB */
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} dbentry_flags;
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/* *********************** DBrefs **************************************/
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#define KEEP_ENTRY_AGE 1
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typedef struct DB_STRUCT {
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Functor id; /* allow pointers to this struct to id */
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/* as dbref */
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Term EntryTerm; /* cell bound to itself */
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SMALLUNSGN Flags; /* Term Flags */
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SMALLUNSGN NOfRefsTo; /* Number of references pointing here */
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struct struct_dbentry *Parent; /* key of DBase reference */
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CODEADDR Code; /* pointer to code if this is a clause */
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struct DB_STRUCT **DBRefs; /* pointer to other references */
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struct DB_STRUCT *Prev; /* Previous element in chain */
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struct DB_STRUCT *Next; /* Next element in chain */
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#if defined(YAPOR) || defined(THREADS)
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lockvar lock; /* a simple lock to protect this entry */
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Int ref_count; /* how many branches are using this entry */
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#endif
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#ifdef KEEP_ENTRY_AGE
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Int age; /* entry's age, negative if from recorda,
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positive if it was recordz */
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#endif /* KEEP_ENTRY_AGE */
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#ifdef COROUTINING
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CELL attachments; /* attached terms */
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#endif
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CELL Mask; /* parts that should be cleared */
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CELL Key; /* A mask that can be used to check before
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you unify */
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CELL NOfCells; /* Size of Term */
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CELL Entry; /* entry point */
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Term Contents[MIN_ARRAY]; /* stored term */
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} DBStruct;
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#define DBStructFlagsToDBStruct(X) ((DBRef)((X) - (CELL) &(((DBRef) NIL)->Flags)))
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#if defined(YAPOR) || defined(THREADS)
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#define INIT_DBREF_COUNT(X) (X)->ref_count = 0
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#define INC_DBREF_COUNT(X) (X)->ref_count++
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#define DEC_DBREF_COUNT(X) (X)->ref_count--
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#define DBREF_IN_USE(X) ((X)->ref_count != 0)
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#else
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#define INIT_DBREF_COUNT(X)
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#define INC_DBREF_COUNT(X)
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#define DEC_DBREF_COUNT(X)
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#define DBREF_IN_USE(X) ((X)->Flags & InUseMask)
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#endif
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typedef DBStruct *DBRef;
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/* extern Functor FunctorDBRef; */
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Inline(IsDBRefTerm, int, Term, t, IsApplTerm(t) && FunctorOfTerm(t) == FunctorDBRef)
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Inline(MkDBRefTerm, Term, DBRef, p, (AbsAppl(((CELL *)(p)))))
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Destructor(Term, DBRefOf, DBRef, t, ((DBRef)(RepAppl(t))))
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Inline(IsRefTerm, int, Term, t, IsApplTerm(t) && FunctorOfTerm(t) == FunctorDBRef)
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Destructor(Term, RefOf, CODEADDR, t, DBRefOfTerm(t))
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typedef struct struct_dbentry {
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Prop NextOfPE; /* used to chain properties */
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PropFlags KindOfPE; /* kind of property */
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unsigned int ArityOfDB; /* kind of property */
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Functor FunctorOfDB; /* functor for this property */
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#if defined(YAPOR) || defined(THREADS)
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rwlock_t DBRWLock; /* a simple lock to protect this entry */
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#endif
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DBRef First; /* first DBase entry */
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DBRef Last; /* last DBase entry */
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SMALLUNSGN ModuleOfDB; /* module for this definition */
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#ifdef KEEP_ENTRY_AGE
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Int age; /* age counter */
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#else
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DBRef FirstNEr; /* first non-erased DBase entry */
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#endif /* KEEP_ENTRY_AGE */
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} DBEntry;
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typedef DBEntry *DBProp;
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#define DBProperty ((PropFlags)0x8000)
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typedef struct {
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Prop NextOfPE; /* used to chain properties */
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PropFlags KindOfPE; /* kind of property */
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unsigned int ArityOfDB; /* kind of property */
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Functor FunctorOfDB; /* functor for this property */
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#if defined(YAPOR) || defined(THREADS)
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rwlock_t DBRWLock; /* a simple lock to protect this entry */
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#endif
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DBRef First; /* first DBase entry */
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DBRef Last; /* last DBase entry */
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SMALLUNSGN ModuleOfDB; /* module for this definition */
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Int NOfEntries; /* age counter */
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DBRef Index; /* age counter */
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} LogUpdDBEntry;
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typedef LogUpdDBEntry *LogUpdDBProp;
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#define LogUpdDBBit 0x1
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#define CodeDBBit 0x2
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#define LogUpdDBProperty ((PropFlags)(0x8000|LogUpdDBBit))
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#define CodeLogUpdDBProperty (DBProperty|LogUpdDBBit|CodeDBBit)
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#define CodeDBProperty (DBProperty|CodeDBBit)
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Inline(IsDBProperty, PropFlags, int, flags, ((flags & ~(LogUpdDBBit|CodeDBBit)) == DBProperty) )
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#if USE_OFFSETS_IN_PROPS
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Destructor(Prop,RepDB,DBProp,p,AtomBase + Unsigned(p))
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Constructor(Prop,AbsDB,DBProp,p,Addr(p)-AtomBase)
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#else
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Destructor(Prop,RepDB,DBProp,p,p)
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Constructor(Prop,AbsDB,DBProp,p,p)
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#endif
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/* These are the actual flags for DataBase terms */
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typedef enum {
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DBAtomic = 0x1,
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DBVar = 0x2,
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DBNoVars = 0x4,
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DBComplex = 0x8,
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DBCode = 0x10,
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DBNoCode = 0x20,
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DBWithRefs = 0x40
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} db_term_flags;
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#define MaxModules 255
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typedef struct {
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Prop NextOfPE; /* used to chain properties */
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PropFlags KindOfPE; /* kind of property */
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Atom KeyOfBB; /* functor for this property */
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DBRef Element; /* blackboard element */
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#if defined(YAPOR) || defined(THREADS)
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rwlock_t BBRWLock; /* a read-write lock to protect the entry */
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#endif
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SMALLUNSGN ModuleOfBB; /* module for this definition */
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} BlackBoardEntry;
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typedef BlackBoardEntry *BBProp;
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#if USE_OFFSETS_IN_PROPS
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Destructor(Prop,RepBB,BlackBoardEntry *,p, AtomBase + Unsigned(p))
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Constructor(Prop,AbsBB,BlackBoardEntry *,p,Addr(p)-AtomBase)
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#else
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Destructor(Prop,RepBB,BlackBoardEntry *,p,p)
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Constructor(Prop,AbsBB,BlackBoardEntry *,p,p)
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#endif
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#define BBProperty ((PropFlags)0xfffb)
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Inline(IsBBProperty, PropFlags, int, flags, (flags == BBProperty))
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/* array property entry structure */
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/* first case is for dynamic arrays */
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typedef struct {
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Prop NextOfPE; /* used to chain properties */
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PropFlags KindOfPE; /* kind of property */
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Int ArrayEArity; /* Arity of Array (positive) */
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#if defined(YAPOR) || defined(THREADS)
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rwlock_t ArRWLock; /* a read-write lock to protect the entry */
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#endif
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Term ValueOfVE; /* Pointer to the actual array */
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} ArrayEntry;
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/* second case is for static arrays */
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/* first, the valid types */
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typedef enum {
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array_of_ints,
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array_of_chars,
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array_of_uchars,
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array_of_doubles,
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array_of_ptrs,
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array_of_atoms,
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array_of_dbrefs,
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array_of_terms
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} static_array_types;
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typedef union {
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Int *ints;
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char *chars;
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unsigned char *uchars;
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Float *floats;
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AtomEntry **ptrs;
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Term *atoms;
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Term *dbrefs;
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DBRef *terms;
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} statarray_elements;
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/* next, the actual data structure */
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typedef struct {
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Prop NextOfPE; /* used to chain properties */
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PropFlags KindOfPE; /* kind of property */
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Int ArrayEArity; /* Arity of Array (negative) */
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#if defined(YAPOR) || defined(THREADS)
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rwlock_t ArRWLock; /* a read-write lock to protect the entry */
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#endif
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static_array_types ArrayType; /* Type of Array Elements. */
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statarray_elements ValueOfVE; /* Pointer to the Array itself */
|
|
} StaticArrayEntry;
|
|
|
|
|
|
#if USE_OFFSETS_IN_PROPS
|
|
Destructor(Prop,RepArray,ArrayEntry *,p, AtomBase + Unsigned(p))
|
|
Constructor(Prop,AbsArray,ArrayEntry *,p,Addr(p)-AtomBase)
|
|
Destructor(Prop,RepStaticArray,StaticArrayEntry *,p, AtomBase + Unsigned(p))
|
|
Constructor(Prop,AbsStaticArray,StaticArrayEntry *,p,Addr(p)-AtomBase)
|
|
#else
|
|
Destructor(Prop,RepArray,ArrayEntry *,p,p)
|
|
Constructor(Prop,AbsArray,ArrayEntry *,p,p)
|
|
Destructor(Prop,RepStaticArray,StaticArrayEntry *,p,p)
|
|
Constructor(Prop,AbsStaticArray,StaticArrayEntry *,p,p)
|
|
#endif
|
|
#define ArrayProperty ((PropFlags)0xfff7)
|
|
|
|
Inline(ArrayIsDynamic, int, ArrayEntry *, are, ((are)->ArrayEArity > 0 ))
|
|
|
|
Inline(IsArrayProperty, PropFlags, int, flags, (flags == ArrayProperty) )
|
|
|
|
/* Proto types */
|
|
|
|
/* cdmgr.c */
|
|
int STD_PROTO(RemoveIndexation,(PredEntry *));
|
|
|
|
/* dbase.c */
|
|
void STD_PROTO(ErDBE,(DBRef));
|
|
DBRef STD_PROTO(StoreTermInDB,(int,int));
|
|
Term STD_PROTO(FetchTermFromDB,(DBRef,int));
|
|
void STD_PROTO(ReleaseTermFromDB,(DBRef));
|
|
|
|
/* .c */
|
|
CODEADDR STD_PROTO(PredIsIndexable,(PredEntry *));
|
|
|
|
/* init.c */
|
|
Atom STD_PROTO(GetOp,(OpEntry *,int *,int));
|
|
|
|
/* vsc: redefined to GetAProp to avoid conflicts with Windows header files */
|
|
Prop STD_PROTO(GetAProp,(Atom,PropFlags));
|
|
Prop STD_PROTO(GetAPropHavingLock,(AtomEntry *,PropFlags));
|
|
|
|
EXTERN inline Prop
|
|
PredPropByFunc(Functor f, SMALLUNSGN cur_mod)
|
|
/* get predicate entry for ap/arity; create it if neccessary. */
|
|
{
|
|
Prop p0;
|
|
FunctorEntry *fe = (FunctorEntry *)f;
|
|
|
|
WRITE_LOCK(fe->FRWLock);
|
|
p0 = fe->PropsOfFE;
|
|
while (p0) {
|
|
PredEntry *p = RepPredProp(p0);
|
|
if (/* p->KindOfPE != 0 || only props */
|
|
(p->ModuleOfPred == cur_mod || !(p->ModuleOfPred))) {
|
|
WRITE_UNLOCK(f->FRWLock);
|
|
return (p0);
|
|
}
|
|
p0 = p->NextOfPE;
|
|
}
|
|
return(NewPredPropByFunctor(fe,cur_mod));
|
|
}
|
|
|
|
EXTERN inline Prop
|
|
PredPropByAtom(Atom at, SMALLUNSGN cur_mod)
|
|
/* get predicate entry for ap/arity; create it if neccessary. */
|
|
{
|
|
Prop p0;
|
|
AtomEntry *ae = RepAtom(at);
|
|
|
|
WRITE_LOCK(ae->ARWLock);
|
|
p0 = ae->PropsOfAE;
|
|
while (p0) {
|
|
PredEntry *pe = RepPredProp(p0);
|
|
if ( pe->KindOfPE == PEProp &&
|
|
(pe->ModuleOfPred == cur_mod || !pe->ModuleOfPred)) {
|
|
WRITE_UNLOCK(ae->ARWLock);
|
|
return(p0);
|
|
}
|
|
p0 = pe->NextOfPE;
|
|
}
|
|
return(NewPredPropByAtom(ae,cur_mod));
|
|
}
|
|
|
|
#if defined(YAPOR) || defined(THREADS)
|
|
void STD_PROTO(ReleasePreAllocCodeSpace, (ADDR));
|
|
#else
|
|
#define ReleasePreAllocCodeSpace(x)
|
|
#endif
|