logical update semantics:
instance of erased element should fail; garbage collection now tries to recover space for code. git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@512 b08c6af1-5177-4d33-ba66-4b1c6b8b522a
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10
C/dbase.c
10
C/dbase.c
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@ -3684,10 +3684,18 @@ p_instance(void)
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{
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Term TermDB;
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Term t1 = Deref(ARG1);
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DBRef dbr;
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if (IsVarTerm(t1) || !IsDBRefTerm(t1))
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return (FALSE);
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while ((TermDB = GetDBTerm(DBRefOfTerm(t1))) == (CELL)0) {
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dbr = DBRefOfTerm(t1);
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if (dbr->Flags & ErasedMask) {
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/* instance/2 of erased terms should fail under log update
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semantics */
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if (dbr->Parent != NULL && dbr->Parent->KindOfPE & LogUpdDBBit)
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return(FALSE);
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}
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while ((TermDB = GetDBTerm(dbr)) == (CELL)0) {
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/* oops, we are in trouble, not enough stack space */
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gc(2, ENV, P);
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t1 = Deref(ARG1);
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27
C/heapgc.c
27
C/heapgc.c
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@ -583,7 +583,7 @@ init_dbtable(tr_fr_ptr trail_ptr) {
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flags = Flags((CELL)pt0);
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/* for the moment, if all references to the term in the stacks
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are only pointers, reset the flag */
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if (FlagOn(DBClMask, flags) && !FlagOn(LogUpdMask, flags)) {
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if (FlagOn(DBClMask, flags)) {
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if (FlagOn(DBNoVars, flags)) {
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CODEADDR entry = ((CODEADDR)pt0 - (CELL) &(((DBRef) NIL)->Flags));
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store_ref_in_dbtable((DBRef)entry);
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@ -879,7 +879,14 @@ mark_variable(CELL_PTR current)
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if ((Functor)cnext == FunctorDBRef) {
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DBRef tref = DBRefOfTerm(ccur);
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/* make sure the reference is marked as in use */
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tref->Flags |= GcFoundMask;
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if ((tref->Flags & ErasedMask) &&
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tref->Parent != NULL &&
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tref->Parent->KindOfPE & LogUpdDBBit) {
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*current = MkDBRefTerm(DBErasedMarker);
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MARK(current);
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} else {
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tref->Flags |= GcFoundMask;
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}
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} else {
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mark_db_fixed(next);
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}
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@ -930,6 +937,7 @@ mark_variable(CELL_PTR current)
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POP_CONTINUATION();
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}
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}
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if (next < H0) POP_CONTINUATION();
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#ifdef INSTRUMENT_GC
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inc_vars_of_type(next,gc_func);
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#endif
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@ -982,7 +990,14 @@ mark_external_reference(CELL *ptr) {
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if ((Functor)(*next) == FunctorDBRef) {
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DBRef tref = DBRefOfTerm(reg);
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/* make sure the reference is marked as in use */
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tref->Flags |= GcFoundMask;
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if ((tref->Flags & ErasedMask) &&
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tref->Parent != NULL &&
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tref->Parent->KindOfPE & LogUpdDBBit) {
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*ptr = MkDBRefTerm(DBErasedMarker);
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MARK(ptr);
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} else {
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tref->Flags |= GcFoundMask;
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}
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} else {
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mark_db_fixed(next);
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}
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@ -1852,8 +1867,8 @@ sweep_trail(choiceptr gc_B, tr_fr_ptr old_TR)
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}
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#endif
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if (!FlagOn(GcFoundMask, flags)) {
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if (FlagOn(DBClMask, flags) && !FlagOn(LogUpdMask, flags)) {
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if (!FlagOn(GcFoundMask, flags) && !FlagOn(LogUpdMask, flags)) {
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if (FlagOn(DBClMask, flags)) {
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Flags((CELL)pt0) = ResetFlag(InUseMask, flags);
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if (FlagOn(ErasedMask, flags)) {
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ErDBE((DBRef) ((CELL)pt0 - (CELL) &(((DBRef) NIL)->Flags)));
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@ -3076,7 +3091,7 @@ static Int
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p_gc(void)
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{
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#ifndef FIXED_STACKS
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do_gc(0, ENV, CP);
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do_gc(0, ENV, P);
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#endif /* FIXED_STACKS */
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return(TRUE);
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}
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8
C/init.c
8
C/init.c
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@ -1070,8 +1070,16 @@ InitCodes(void)
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heap_regs->getworkcode.u.ld.p = (CODEADDR)RepPredProp(PredPropByAtom(LookupAtom("$getwork"), 0));
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heap_regs->getworkcode_seq.u.ld.p = (CODEADDR)RepPredProp(PredPropByAtom(LookupAtom("$getwork_seq"), 0));
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#endif
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heap_regs->db_erased_marker =
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(DBRef)AllocCodeSpace(sizeof(DBStruct));
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heap_regs->db_erased_marker->id = FunctorDBRef;
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heap_regs->db_erased_marker->Flags = ErasedMask;
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heap_regs->db_erased_marker->Code = NULL;
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INIT_LOCK(heap_regs->db_erased_marker->lock);
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INIT_DBREF_COUNT(heap_regs->db_erased_marker);
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}
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static void
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InitVersion(void)
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{
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2
C/save.c
2
C/save.c
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@ -1158,6 +1158,8 @@ restore_codes(void)
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#endif
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if (heap_regs->last_wtime != NULL)
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heap_regs->last_wtime = (void *)PtoHeapCellAdjust((CELL *)(heap_regs->last_wtime));
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heap_regs->db_erased_marker =
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DBRefAdjust(heap_regs->db_erased_marker);
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}
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/* restore some heap registers */
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4
H/Heap.h
4
H/Heap.h
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@ -10,7 +10,7 @@
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* File: Heap.h *
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* mods: *
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* comments: Heap Init Structure *
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* version: $Id: Heap.h,v 1.26 2002-05-23 03:52:34 vsc Exp $ *
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* version: $Id: Heap.h,v 1.27 2002-06-04 00:46:32 vsc Exp $ *
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*************************************************************************/
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/* information that can be stored in Code Space */
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@ -282,6 +282,7 @@ typedef struct various_codes {
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PredEntry *pred_throw;
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PredEntry *pred_handle_throw;
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struct array_entry *dyn_array_list;
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struct DB_STRUCT *db_erased_marker;
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UInt n_of_file_aliases;
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UInt sz_of_file_aliases;
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struct AliasDescS * file_aliases;
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@ -474,6 +475,7 @@ typedef struct various_codes {
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#define PredThrow heap_regs->pred_throw
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#define PredHandleThrow heap_regs->pred_handle_throw
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#define DynArrayList heap_regs->dyn_array_list
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#define DBErasedMarker heap_regs->db_erased_marker
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#define NOfFileAliases heap_regs->n_of_file_aliases
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#define SzOfFileAliases heap_regs->sz_of_file_aliases
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#define FileAliases heap_regs->file_aliases
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@ -90,7 +90,7 @@ TEXI2PDF=texi2pdf
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#4.1VPATH=@srcdir@:@srcdir@/OPTYap
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CWD=$(PWD)
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#
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VERSION=Yap-4.3.21
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VERSION=Yap-4.3.22
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#
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TAG_HEADERS= Tags_32bits.h Tags_32Ops.h Tags_32LowTag.h\
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@ -16,6 +16,14 @@
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<h2>Yap-4.3.22:</h2>
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<ul>
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<li>FIXED: recover space for logical update semantics.</li>
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<li>FIXED: smash references to deleted entries with logical
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update semantics.</li>
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<li>FIXED: make instance of deleted fail for logical
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update semantics.</li>
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<li>FIXED: smash references to deleted references for logical
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update semantics.</li>
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<li>FIXED: garbage_collect should call do_gc with P, not CP.</li>
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<li>FIXED: use YAPSHAREDIR as in manual (Ashwin Srinivasan).</li>
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<li>FIXED: warning message about unify_extension.</li>
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</ul>
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@ -8,8 +8,8 @@
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@c @setchapternewpage odd
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@c %**end of header
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@set VERSION 4.3.21
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@set EDITION 4.1.1
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@set VERSION 4.3.22
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@set EDITION 4.2.1
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@set UPDATED January 2002
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@c Index for C-Prolog compatible predicate
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@ -1,6 +1,6 @@
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Name: Yap
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Summary: Prolog Compiler
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Version: 4.3.21
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Version: 4.3.22
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Packager: Vitor Santos Costa <vitor@cos.ufrj.br>
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Release: 1
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Source: http://www.ncc.up.pt/~vsc/Yap/Yap4.3/%{name}-%{version}.tar.gz
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