support trace
fix for ^c in readline git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@133 b08c6af1-5177-4d33-ba66-4b1c6b8b522a
This commit is contained in:
vsc
parent
5d57058e8e
commit
8fd1bc92f3
17
C/cdmgr.c
17
C/cdmgr.c
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@ -2161,6 +2161,22 @@ p_clean_up_dead_clauses(void)
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return(TRUE);
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}
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static Int /* $parent_pred(Module, Name, Arity) */
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p_parent_pred(void)
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{
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Atom at;
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Int arity;
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SMALLUNSGN module;
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if (!PredForCode((CODEADDR)CP, &at, &arity, &module)) {
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return(unify(ARG1, MkIntTerm(0)) &&
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unify(ARG2, MkAtomTerm(AtomMetaCall)) &&
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unify(ARG3, MkIntTerm(0)));
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}
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return(unify(ARG1, MkIntTerm(module)) &&
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unify(ARG2, MkAtomTerm(at)) &&
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unify(ARG3, MkIntTerm(arity)));
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}
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void
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InitCdMgr(void)
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{
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@ -2197,4 +2213,5 @@ InitCdMgr(void)
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InitCPred("$search_for_static_predicates_in_use", 1, p_search_for_static_predicate_in_use, TestPredFlag|SafePredFlag|SyncPredFlag);
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InitCPred("$toggle_static_predicates_in_use", 0, p_toggle_static_predicates_in_use, SafePredFlag|SyncPredFlag);
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InitCPred("$set_pred_module", 2, p_set_pred_module, SafePredFlag);
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InitCPred("$parent_pred", 3, p_parent_pred, SafePredFlag);
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}
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31
C/exec.c
31
C/exec.c
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@ -200,6 +200,16 @@ CallMetaCall(void) {
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return (FastCallProlog(PredMetaCall));
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}
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inline static Int
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EnterCreepMode(PredEntry *pen) {
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Atom a = NameOfFunctor(FunctorSpy);
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PredEntry *PredSpy = RepPredProp(PredProp(a,1));
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ARG1 = MkPairTerm(Module_Name((CODEADDR)(pen)),ARG1);
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CreepFlag = CalculateStackGap();
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WRITE_LOCK(PredSpy->PRWLock);
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return (FastCallProlog(PredSpy));
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}
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static Int
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p_execute(void)
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{ /* '$execute'(Goal) */
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@ -209,10 +219,6 @@ p_execute(void)
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Atom a;
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restart_exec:
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if (yap_flags[SPY_CREEP_FLAG]) {
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a = NameOfFunctor(FunctorSpiedMetaCall);
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return (CallProlog(RepPredProp(PredProp(a,1)), 1, (Int) (-1)));
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}
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if (PredGoalExpansion->OpcodeOfPred != UNDEF_OPCODE) {
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return(CallMetaCall());
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} else if (IsVarTerm(t)) {
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@ -268,6 +274,9 @@ p_execute(void)
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if (pen->PredFlags & MetaPredFlag) {
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return(CallMetaCall());
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}
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if (yap_flags[SPY_CREEP_FLAG]) {
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return(EnterCreepMode(pen));
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}
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/* now let us do what we wanted to do from the beginning !! */
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/* I cannot use the standard macro here because
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otherwise I would dereference the argument and
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@ -312,6 +321,9 @@ p_execute(void)
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return(CallMetaCall());
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}
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}
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if (yap_flags[SPY_CREEP_FLAG]) {
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return(EnterCreepMode(RepPredProp(pe)));
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}
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return (CallProlog(RepPredProp(pe), arity, (Int) (-1)));
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} else {
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/* Is Pair Term */
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@ -336,10 +348,6 @@ p_execute_within(void)
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Atom a;
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restart_exec:
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if (yap_flags[SPY_CREEP_FLAG]) {
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a = NameOfFunctor(FunctorSpiedMetaCall);
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return (CallProlog(RepPredProp(PredProp(a,1)), 1, (Int) (-1)));
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}
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if (PredGoalExpansion->OpcodeOfPred != UNDEF_OPCODE) {
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return(CallMetaCallWithin());
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} else if (IsVarTerm(t)) {
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@ -395,6 +403,10 @@ p_execute_within(void)
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if (pen->PredFlags & MetaPredFlag) {
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return(CallMetaCallWithin());
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}
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/* at this point check if we should enter creep mode */
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if (yap_flags[SPY_CREEP_FLAG]) {
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return(EnterCreepMode(pen));
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}
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/* now let us do what we wanted to do from the beginning !! */
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/* I cannot use the standard macro here because
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otherwise I would dereference the argument and
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@ -463,6 +475,9 @@ p_execute_within(void)
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return(CallMetaCallWithin());
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}
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}
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if (yap_flags[SPY_CREEP_FLAG]) {
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return(EnterCreepMode(RepPredProp(pe)));
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}
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return (CallProlog(RepPredProp(pe), arity, (Int) (-1)));
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} else {
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/* Is Pair Term */
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6
C/init.c
6
C/init.c
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@ -710,7 +710,7 @@ InitCodes(void)
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AtomNot,
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AtomQuery,
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AtomSemic,
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AtomSpiedMetaCall,
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AtomSpy,
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AtomStream,
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AtomStreamPos,
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AtomVar;
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@ -881,7 +881,7 @@ InitCodes(void)
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AtomStreamPos = LookupAtom ("$stream_position");
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heap_regs->atom_throw = LookupAtom("$throw");
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heap_regs->atom_true = LookupAtom("true");
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AtomSpiedMetaCall = LookupAtom("$spied_meta_call");
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AtomSpy = LookupAtom("$spy");
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heap_regs->atom_user = LookupAtom ("user");
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heap_regs->atom_usr_err = LookupAtom ("user_error");
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heap_regs->atom_usr_in = LookupAtom ("user_input");
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@ -927,7 +927,7 @@ InitCodes(void)
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heap_regs->functor_or = MkFunctor(AtomSemic, 2);
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heap_regs->functor_portray = MkFunctor(AtomPortray, 1);
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heap_regs->functor_query = MkFunctor(AtomQuery, 1);
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heap_regs->functor_spied_meta_call = MkFunctor(AtomSpiedMetaCall, 1);
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heap_regs->functor_spy = MkFunctor(AtomSpy, 1);
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heap_regs->functor_stream = MkFunctor (AtomStream, 1);
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heap_regs->functor_stream_pos = MkFunctor (AtomStreamPos, 3);
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heap_regs->functor_stream_eOS = MkFunctor (LookupAtom("end_of_stream"), 1);
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28
C/iopreds.c
28
C/iopreds.c
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@ -82,14 +82,14 @@ jmp_buf IOBotch;
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int in_getc = FALSE;
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int sigint_pending = FALSE;
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#if HAVE_LIBREADLINE
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jmp_buf readline_jmpbuf;
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#if _MSC_VER || defined(__MINGW32__)
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FILE *rl_instream, *rl_outstream;
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#endif
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jmp_buf readline_jmpbuf;
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#endif
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typedef struct
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@ -512,9 +512,9 @@ PlIOError (yap_error_number type, Term culprit, char *who)
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/*
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* Used by the prompts to check if they are after a newline, and then a
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* prompt should be output, or if we are in the middle of a line
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* prompt should be output, or if we are in the middle of a line.
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*/
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static int newline = TRUE;
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int newline = TRUE;
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static void
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count_output_char(int ch, StreamDesc *s, int sno)
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@ -863,15 +863,23 @@ ReadlineGetc(int sno)
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register StreamDesc *s = &Stream[sno];
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register int ch;
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if (ttyptr == NIL) {
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if (setjmp(readline_jmpbuf) < 0) {
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Abort("");
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}
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while (ttyptr == NULL) {
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in_getc = TRUE;
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/* Do it the gnu way */
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if (sigsetjmp(readline_jmpbuf, TRUE)) {
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printf("hello\n");
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if (PrologMode & InterruptMode) {
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PrologMode &= ~InterruptMode;
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ProcessSIGINT();
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if (PrologMode & AbortMode) {
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PrologMode &= ~AbortMode;
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Abort("");
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}
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}
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}
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YP_fflush (YP_stdout);
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/* Only sends a newline if we are at the start of a line */
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if (_line != (char *) NULL && _line != (char *) EOF)
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if (_line != NULL && _line != (char *) EOF)
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free (_line);
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rl_instream = Stream[sno].u.file.file;
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rl_outstream = Stream[cur_out_sno].u.file.file;
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2
C/save.c
2
C/save.c
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@ -1088,7 +1088,7 @@ restore_codes(void)
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heap_regs->functor_or = FuncAdjust(heap_regs->functor_or);
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heap_regs->functor_portray = FuncAdjust(heap_regs->functor_portray);
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heap_regs->functor_query = FuncAdjust(heap_regs->functor_query);
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heap_regs->functor_spied_meta_call = FuncAdjust(heap_regs->functor_spied_meta_call);
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heap_regs->functor_spy = FuncAdjust(heap_regs->functor_spy);
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heap_regs->functor_stream = FuncAdjust(heap_regs->functor_stream);
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heap_regs->functor_stream_pos = FuncAdjust(heap_regs->functor_stream_pos);
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heap_regs->functor_stream_eOS = FuncAdjust(heap_regs->functor_stream_eOS);
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60
C/sysbits.c
60
C/sysbits.c
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@ -885,7 +885,7 @@ my_signal_info(int sig, void (*handler)(int, siginfo_t *, ucontext_t *))
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sigact.sa_handler = handler;
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sigemptyset(&sigact.sa_mask);
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sigact.sa_flags = SA_SIGINFO|SA_RESTART;
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sigact.sa_flags = SA_SIGINFO;
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sigaction(sig,&sigact,NULL);
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}
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@ -897,9 +897,7 @@ my_signal(int sig, void (*handler)(int, siginfo_t *, ucontext_t *))
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sigact.sa_handler=handler;
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sigemptyset(&sigact.sa_mask);
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sigact.sa_flags = 0
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;
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sigact.sa_flags = 0;
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sigaction(sig,&sigact,NULL);
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}
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@ -1014,11 +1012,6 @@ HandleSIGSEGV(int sig)
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#ifdef HAVE_SIGACTION
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#if !defined(SA_RESTART)
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/* sunos machine has no SA_RESTART, as most other 4.2BSD based machines */
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#define SA_RESTART 0
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#endif
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static void
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my_signal_info(int sig, void (*handler)(int))
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{
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@ -1026,7 +1019,6 @@ my_signal_info(int sig, void (*handler)(int))
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sigact.sa_handler = handler;
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sigemptyset(&sigact.sa_mask);
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sigact.sa_flags = SA_RESTART;
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sigaction(sig,&sigact,NULL);
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}
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@ -1038,7 +1030,6 @@ my_signal(int sig, void (*handler)(int))
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sigact.sa_handler=handler;
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sigemptyset(&sigact.sa_mask);
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sigact.sa_flags = SA_RESTART;
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sigaction(sig,&sigact,NULL);
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}
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@ -1081,6 +1072,10 @@ InteractSIGINT(char ch) {
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case 'c':
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/* continue */
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return(1);
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case 'd':
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/* enter debug mode */
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PutValue (LookupAtom ("debug"), MkIntTerm (1));
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return(1);
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case 'e':
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/* exit */
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exit_yap(0, "");
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@ -1089,7 +1084,8 @@ InteractSIGINT(char ch) {
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/* start tracing */
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PutValue (LookupAtom ("debug"), MkIntTerm (1));
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PutValue (LookupAtom ("spy_sl"), MkIntTerm (0));
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PutValue (LookupAtom ("spy_creep"), MkIntTerm (1));
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PutValue (FullLookupAtom ("$trace"), MkIntTerm (1));
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yap_flags[SPY_CREEP_FLAG] = 1;
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p_creep ();
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return(1);
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#ifdef LOW_LEVEL_TRACER
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@ -1097,10 +1093,6 @@ InteractSIGINT(char ch) {
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toggle_low_level_trace();
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return(1);
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#endif
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case 'd':
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/* enter debug mode */
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PutValue (LookupAtom ("debug"), MkIntTerm (1));
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return(1);
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case 's':
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/* show some statistics */
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#if SHORT_INTS==0
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@ -1163,7 +1155,7 @@ InteractSIGINT(char ch) {
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/* show an helpful message */
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YP_fprintf(YP_stderr, "Please press one of:\n");
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YP_fprintf(YP_stderr, " a for abort\n c for continue\n d for debug\n");
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YP_fprintf(YP_stderr, " e for exit\n t for trace\n s for statistics\n");
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YP_fprintf(YP_stderr, " e for exit\n s for statistics\n t for trace\n");
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return(0);
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}
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}
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@ -1176,6 +1168,7 @@ int
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ProcessSIGINT(void)
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{
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int ch, out;
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extern int newline;
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do {
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#if HAVE_LIBREADLINE
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@ -1187,6 +1180,8 @@ ProcessSIGINT(void)
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continue;
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}
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ch = _line[0];
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free(_line);
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_line = NULL;
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#else
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/* ask for a new line */
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fprintf(stderr, "Action (h for help): ");
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@ -1195,13 +1190,7 @@ ProcessSIGINT(void)
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while ((fgetc(stdin)) != '\n');
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#endif
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} while (!(out = InteractSIGINT(ch)));
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if (out < 0)
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sigint_pending = out;
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#if HAVE_LIBREADLINE
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if (in_getc) {
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longjmp(readline_jmpbuf, (out < 0 ? -1 : 1));
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}
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#endif
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newline = TRUE;
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return(out);
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}
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@ -1222,26 +1211,23 @@ HandleSIGINT (int sig)
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InteractSIGINT('e');
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}
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#endif
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#if !HAVE_LIBREADLINE
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if (in_getc) {
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if (in_getc || (PrologMode & CritMode)) {
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PrologMode |= InterruptMode;
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return;
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}
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#if HAVE_LIBREADLINE
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if (in_getc) {
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siglongjmp(readline_jmpbuf, 0);
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}
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#endif
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if (PrologMode & CritMode) {
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/* delay processing if we are messing with the Code space */
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PrologMode |= InterruptMode;
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return;
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}
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#ifdef HAVE_SETBUF
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/* make sure we are not waiting for the end of line */
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YP_setbuf (stdin, NULL);
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YP_setbuf (stdin, NULL);
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#endif
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if (snoozing)
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{
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snoozing = FALSE;
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return;
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}
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if (snoozing) {
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snoozing = FALSE;
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return;
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}
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ProcessSIGINT();
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}
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@ -20,6 +20,7 @@
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#ifdef LOW_LEVEL_TRACER
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#include "Yatom.h"
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#include "Heap.h"
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#include "yapio.h"
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#include "tracer.h"
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@ -132,7 +133,7 @@ low_level_trace(yap_low_level_port port, PredEntry *pred, CELL *args)
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/* if (vsc_count < 2518) return; */
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/* if (vsc_count > 500000) exit(0); */
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/* if (gc_calls < 1) return;*/
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YP_fprintf(YP_stderr,"%lu (%p)", vsc_count, H);
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YP_fprintf(YP_stderr,"%lu (%x,%d)", vsc_count, CreepFlag,yap_flags[SPY_CREEP_FLAG]);
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/* check_trail_consistency(); */
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if (pred == NULL) {
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return;
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@ -101,7 +101,7 @@ static void copy_complex_term(register CELL *pt0, register CELL *pt0_end, CELL *
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pt0_end = ap2 + 1;
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ptf = H;
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H += 2;
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if (H > ENV - CreepFlag) {
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if (H > ENV - 2048) {
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goto overflow;
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}
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} else if (IsApplTerm(d0)) {
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@ -148,7 +148,7 @@ static void copy_complex_term(register CELL *pt0, register CELL *pt0_end, CELL *
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H[0] = (CELL)f;
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ptf = H+1;
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H += 1+d0;
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if (H > ENV - CreepFlag) {
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if (H > ENV - 2048) {
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goto overflow;
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}
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} else {
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@ -368,7 +368,7 @@ static void copy_complex_term_no_delays(register CELL *pt0, register CELL *pt0_e
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pt0_end = ap2 + 1;
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ptf = H;
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H += 2;
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if (H > ENV - CreepFlag) {
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if (H > ENV - 2048) {
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goto overflow;
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}
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} else if (IsApplTerm(d0)) {
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@ -413,7 +413,7 @@ static void copy_complex_term_no_delays(register CELL *pt0, register CELL *pt0_e
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H[0] = (CELL)f;
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ptf = H+1;
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H += 1+d0;
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if (H > ENV - CreepFlag) {
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if (H > ENV - 2048) {
|
||||
goto overflow;
|
||||
}
|
||||
} else {
|
||||
|
|
|
|||
6
H/Heap.h
6
H/Heap.h
|
|
@ -10,7 +10,7 @@
|
|||
* File: Heap.h *
|
||||
* mods: *
|
||||
* comments: Heap Init Structure *
|
||||
* version: $Id: Heap.h,v 1.7 2001-06-22 17:53:36 vsc Exp $ *
|
||||
* version: $Id: Heap.h,v 1.8 2001-08-08 21:17:27 vsc Exp $ *
|
||||
*************************************************************************/
|
||||
|
||||
/* information that can be stored in Code Space */
|
||||
|
|
@ -243,7 +243,7 @@ typedef struct various_codes {
|
|||
functor_or,
|
||||
functor_portray,
|
||||
functor_query,
|
||||
functor_spied_meta_call,
|
||||
functor_spy,
|
||||
functor_stream,
|
||||
functor_stream_pos,
|
||||
functor_stream_eOS,
|
||||
|
|
@ -427,7 +427,7 @@ typedef struct various_codes {
|
|||
#define FunctorOr heap_regs->functor_or
|
||||
#define FunctorPortray heap_regs->functor_portray
|
||||
#define FunctorQuery heap_regs->functor_query
|
||||
#define FunctorSpiedMetaCall heap_regs->functor_spied_meta_call
|
||||
#define FunctorSpy heap_regs->functor_spy
|
||||
#define FunctorStream heap_regs->functor_stream
|
||||
#define FunctorStreamPos heap_regs->functor_stream_pos
|
||||
#define FunctorStreamEOS heap_regs->functor_stream_eOS
|
||||
|
|
|
|||
|
|
@ -316,9 +316,8 @@ extern int Portray_delays;
|
|||
|
||||
extern jmp_buf IOBotch;
|
||||
|
||||
#if HAVE_LIBREADLINE
|
||||
extern jmp_buf readline_jmpbuf;
|
||||
extern int in_getc;
|
||||
|
||||
#ifdef HAVE_LIBREADLINE
|
||||
extern sigjmp_buf readline_jmpbuf;
|
||||
#endif
|
||||
|
||||
extern int in_getc, sigint_pending;
|
||||
|
||||
|
|
|
|||
|
|
@ -16,6 +16,9 @@
|
|||
|
||||
<h2>Yap-4.3.19:</h2>
|
||||
<ul>
|
||||
<li>NEW: trace and notrace.</li>
|
||||
<li>FIXED: make C-c t actually trace.</li>
|
||||
<li>FIXED: put [debug] when in debug mode.</li>
|
||||
<li>FIXED: make install_info.(actual fix is in Yap-4.3.19)</li>
|
||||
</ul>
|
||||
|
||||
|
|
|
|||
12
docs/yap.tex
12
docs/yap.tex
|
|
@ -11544,6 +11544,9 @@ The possible forms for @var{P} are the same as in @code{spy P}.
|
|||
@cnindex nospyall/0
|
||||
Removes all existing spy-points.
|
||||
|
||||
@item notrace
|
||||
Switches off the debugger and stops tracing.
|
||||
|
||||
@item leash(+@var{M})
|
||||
@findex leash/1
|
||||
@syindex leash/1
|
||||
|
|
@ -11601,6 +11604,9 @@ the ports where the debugger should stop. For example,
|
|||
If defined by the user, this predicate will be used to print goals by
|
||||
the debugger instead of @code{write/2}.
|
||||
|
||||
@item trace
|
||||
Switches on the debugger and starts tracing.
|
||||
|
||||
@end table
|
||||
|
||||
|
||||
|
|
@ -12805,12 +12811,6 @@ These are YAP built-ins not available in C-Prolog.
|
|||
These are C-Prolog built-ins not available in YAP:
|
||||
|
||||
@table @code
|
||||
@item notrace
|
||||
Switches off the debugger and stops tracing.
|
||||
|
||||
@item trace
|
||||
Switches on the debugger and starts tracing.
|
||||
|
||||
@item 'LC'
|
||||
The following Prolog text uses lower case letters.
|
||||
|
||||
|
|
|
|||
|
|
@ -10,7 +10,7 @@
|
|||
* File: Yap.h.m4 *
|
||||
* mods: *
|
||||
* comments: main header file for YAP *
|
||||
* version: $Id: Yap.h.m4,v 1.8 2001-07-04 16:48:54 uid49918 Exp $ *
|
||||
* version: $Id: Yap.h.m4,v 1.9 2001-08-08 21:17:27 vsc Exp $ *
|
||||
*************************************************************************/
|
||||
|
||||
#include "config.h"
|
||||
|
|
@ -362,7 +362,7 @@ typedef CELL Term;
|
|||
#ifdef mips
|
||||
#include <mips_locks_funcs.h>
|
||||
#endif
|
||||
#ifdef mips
|
||||
#ifdef __alpha
|
||||
#include <alpha_locks_funcs.h>
|
||||
#endif
|
||||
#endif
|
||||
|
|
|
|||
15
pl/boot.yap
15
pl/boot.yap
|
|
@ -158,6 +158,15 @@ nl.
|
|||
prompt(_,' | '),
|
||||
'$system_catch'('$do_yes_no'((G->true)),Error,user:'$Error'(Error)),
|
||||
fail.
|
||||
'$enter_top_level' :-
|
||||
( '$get_value'('$trace', 1) ->
|
||||
'$set_value'(spy_sl,0),
|
||||
'$format'(user_error, "[trace]~n", [])
|
||||
;
|
||||
'$get_value'(debug, 1) ->
|
||||
'$format'(user_error, "[debug]~n", [])
|
||||
),
|
||||
fail.
|
||||
'$enter_top_level' :-
|
||||
prompt(_,' ?- '),
|
||||
prompt(' | '),
|
||||
|
|
@ -166,7 +175,11 @@ nl.
|
|||
'$set_value'(spy_fs,0),
|
||||
'$set_value'(spy_sp,0),
|
||||
'$set_value'(spy_gn,1),
|
||||
'$set_yap_flags'(10,0),
|
||||
( '$get_value'('$trace', 1) ->
|
||||
'$set_yap_flags'(10,1)
|
||||
;
|
||||
'$set_yap_flags'(10,0)
|
||||
),
|
||||
'$set_value'(spy_cl,1),
|
||||
'$set_value'(spy_leap,0),
|
||||
'$setflop'(0),
|
||||
|
|
|
|||
33
pl/debug.yap
33
pl/debug.yap
|
|
@ -104,7 +104,23 @@ debug :- '$set_value'(debug,1), write(user_error,'[ Debug mode on ]'), nl(user_e
|
|||
|
||||
nodebug :- nospyall,
|
||||
'$set_value'(debug,0),
|
||||
write(user_error,'[ Debug mode off ]'), nl(user_error).
|
||||
'$set_value'('$trace',0),
|
||||
'$format'(user_error,"[ Debug mode off ]~n",[]).
|
||||
|
||||
trace :- '$get_value'('$trace',1), !.
|
||||
trace :-
|
||||
'$format'(user_error,"[ Trace mode on ]~n",[]),
|
||||
'$set_value'('$trace',1),
|
||||
'$set_value'(debug,1),
|
||||
'$set_value'(spy_sl,0),
|
||||
% start creep,
|
||||
'$set_yap_flags'(10,1),
|
||||
'$creep'.
|
||||
|
||||
notrace :-
|
||||
'$set_value'('$trace',0),
|
||||
'$set_value'(debug,0),
|
||||
'$format'(user_error,"[ Trace and Debug mode off ]",[]).
|
||||
|
||||
/*-----------------------------------------------------------------------------
|
||||
|
||||
|
|
@ -220,6 +236,7 @@ debugging :-
|
|||
% spy_leap leap 0 0...
|
||||
% spy_cl clause number 1 1...
|
||||
% spy_fs fast skip 0 0, 1
|
||||
% spy_trace trace 0 0, 1
|
||||
% a flip-flop is also used
|
||||
% when 1 spying is enabled
|
||||
%'$spy'(G) :- write(user_error,'$spy'(G)), nl, fail.
|
||||
|
|
@ -230,17 +247,20 @@ debugging :-
|
|||
'$awoken_goals'(LG), !,
|
||||
'$creep',
|
||||
'$wake_up_goal'(G, LG).
|
||||
'$spy'([Module|G]) :-
|
||||
% '$format'(user_error,"$spym(~w,~w)~n",[Module,G]),
|
||||
'$system_predicate'(G),
|
||||
'$parent_pred'(0,_,_),
|
||||
!,
|
||||
/* called from prolog module */
|
||||
'$creep',
|
||||
'$execute0'(G).
|
||||
'$spy'([Module|G]) :- !,
|
||||
% write(user_error,$spym(M,G)), nl,
|
||||
( Module=prolog -> '$spy'(G);
|
||||
'$mod_switch'(Module, '$spy'(G))
|
||||
).
|
||||
'$spy'(true) :- !, '$creep'.
|
||||
'$spy'('$cut_by'(M)) :- !, '$cut_by'(M).
|
||||
'$spy'(G) :-
|
||||
'$hidden'(G), !, /* dont spy hidden predicates */
|
||||
'$creep',
|
||||
'$execute0'(G).
|
||||
'$spy'(G) :-
|
||||
% write(user_error,$spy(G)), nl,
|
||||
'$get_value'(debug,1), /* ditto if debug off */
|
||||
|
|
@ -292,6 +312,7 @@ debugging :-
|
|||
'$spy'(G) :- '$execute0'(G). /* this clause applies when we do not want
|
||||
to spy the goal */
|
||||
|
||||
'$cont_creep' :- '$get_value'('$trace',1), '$set_yap_flags'(10,1), fail.
|
||||
'$cont_creep' :- '$access_yap_flags'(10,1), !, '$creep'.
|
||||
'$cont_creep'.
|
||||
|
||||
|
|
|
|||
Reference in New Issue