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yap-6.3/C/stack.c

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/*************************************************************************
* *
* YAP Prolog *
* *
* Yap Prolog was developed at NCCUP - Universidade do Porto *
* *
* Copyright L.Damas, V.S.Costa and Universidade do Porto 1985-1997 *
* *
**************************************************************************
* *
* File: stack.c *
* comments: Stack Introspection *
* *
* Last rev: $Date: 2008-07-22 23:34:44 $,$Author: vsc $ *
* $Log: not supported by cvs2svn $ *
* Revision 1.230 2008/06/02 17:20:28 vsc *
* *
* *
*************************************************************************/
/**
* @file stack.c
* @author VITOR SANTOS COSTA <vsc@VITORs-MacBook-Pro.local>
* @date Tue Sep 8 23:33:02 2015
*
* @brief Get to know what is in your stack.
*
*
*/
#include "Yap.h"
#include "clause.h"
#include "yapio.h"
#include "eval.h"
#include "tracer.h"
#ifdef YAPOR
#include "or.macros.h"
#endif /* YAPOR */
#ifdef TABLING
#include "tab.macros.h"
#endif /* TABLING */
#if HAVE_STRING_H
#include <string.h>
#endif
#include <heapgc.h>
#if !defined(YAPOR) && !defined(THREADS)
static void mark_pred(int, PredEntry *);
static void do_toggle_static_predicates_in_use(int);
#endif
static Int in_use( USES_REGS1 );
static Int toggle_static_predicates_in_use( USES_REGS1 );
static Int PredForCode(yamop *, Atom *, arity_t *, Term *);
static LogUpdIndex *find_owner_log_index(LogUpdIndex *, yamop *);
static StaticIndex *find_owner_static_index(StaticIndex *, yamop *);
#define IN_BLOCK(P,B,SZ) ((CODEADDR)(P) >= (CODEADDR)(B) && \
(CODEADDR)(P) < (CODEADDR)(B)+(SZ))
static PredEntry *
get_pred(Term t, Term tmod, char *pname)
{
Term t0 = t;
restart:
if (IsVarTerm(t)) {
Yap_Error(INSTANTIATION_ERROR, t0, pname);
return NULL;
} else if (IsAtomTerm(t)) {
return RepPredProp(Yap_GetPredPropByAtom(AtomOfTerm(t), tmod));
} else if (IsIntegerTerm(t) && tmod == IDB_MODULE) {
return Yap_FindLUIntKey(IntegerOfTerm(t));
} else if (IsApplTerm(t)) {
Functor fun = FunctorOfTerm(t);
if (IsExtensionFunctor(fun)) {
Yap_Error(TYPE_ERROR_CALLABLE, Yap_PredicateIndicator(t, tmod), pname);
return NULL;
}
if (fun == FunctorModule) {
Term tmod = ArgOfTerm(1, t);
if (IsVarTerm(tmod) ) {
Yap_Error(INSTANTIATION_ERROR, t0, pname);
return NULL;
}
if (!IsAtomTerm(tmod) ) {
Yap_Error(TYPE_ERROR_ATOM, t0, pname);
return NULL;
}
t = ArgOfTerm(2, t);
goto restart;
}
return RepPredProp(Yap_GetPredPropByFunc(fun, tmod));
} else
return NULL;
}
static PredEntry *
PredForChoicePt(yamop *p_code, op_numbers *opn) {
while (TRUE) {
op_numbers opnum;
if (!p_code)
return NULL;
opnum = Yap_op_from_opcode(p_code->opc);
if (opn)
*opn = opnum;
switch(opnum) {
case _Nstop:
return NULL;
case _jump:
p_code = p_code->y_u.l.l;
break;
case _retry_me:
case _trust_me:
return p_code->y_u.Otapl.p;
case _retry_exo:
case _retry_all_exo:
return p_code->y_u.lp.p;
case _try_logical:
case _retry_logical:
case _trust_logical:
case _count_retry_logical:
case _count_trust_logical:
case _profiled_retry_logical:
case _profiled_trust_logical:
return p_code->y_u.OtaLl.d->ClPred;
#ifdef TABLING
case _trie_trust_var:
case _trie_retry_var:
case _trie_trust_var_in_pair:
case _trie_retry_var_in_pair:
case _trie_trust_val:
case _trie_retry_val:
case _trie_trust_val_in_pair:
case _trie_retry_val_in_pair:
case _trie_trust_atom:
case _trie_retry_atom:
case _trie_trust_atom_in_pair:
case _trie_retry_atom_in_pair:
case _trie_trust_null:
case _trie_retry_null:
case _trie_trust_null_in_pair:
case _trie_retry_null_in_pair:
case _trie_trust_pair:
case _trie_retry_pair:
case _trie_trust_appl:
case _trie_retry_appl:
case _trie_trust_appl_in_pair:
case _trie_retry_appl_in_pair:
case _trie_trust_extension:
case _trie_retry_extension:
case _trie_trust_double:
case _trie_retry_double:
case _trie_trust_longint:
case _trie_retry_longint:
case _trie_trust_gterm:
case _trie_retry_gterm:
return NULL;
case _table_load_answer:
case _table_try_answer:
case _table_answer_resolution:
case _table_completion:
#ifdef THREADS_CONSUMER_SHARING
case _table_answer_resolution_completion:
#endif /* THREADS_CONSUMER_SHARING */
return NULL; /* ricroc: is this OK? */
/* compile error --> return ENV_ToP(gc_B->cp_cp); */
#endif /* TABLING */
case _or_else:
if (p_code == p_code->y_u.Osblp.l) {
/* repeat */
Atom at = AtomRepeatSpace;
return RepPredProp(PredPropByAtom(at, PROLOG_MODULE));
} else {
return p_code->y_u.Osblp.p0;
}
break;
case _or_last:
#ifdef YAPOR
return p_code->y_u.Osblp.p0;
#else
return p_code->y_u.p.p;
#endif /* YAPOR */
break;
case _count_retry_me:
case _retry_profiled:
case _retry2:
case _retry3:
case _retry4:
p_code = NEXTOP(p_code,l);
break;
default:
return p_code->y_u.Otapl.p;
}
}
return NULL;
}
/**
* Yap_PredForChoicePt(): find out the predicate who generated a CP.
*
* @param cp the choice point
* @param op the YAAM instruction to process next
*
* @return A predixate structure or NULL
*
* usually pretty straightforward, it can fall in trouble with
8 OR-P or tabling.
*/
PredEntry *
Yap_PredForChoicePt(choiceptr cp, op_numbers *op) {
if (cp == NULL)
return NULL;
return PredForChoicePt(cp->cp_ap, op);
}
#if !defined(YAPOR) && !defined(THREADS)
static yamop *cur_clause(PredEntry *pe, yamop *codeptr)
{
StaticClause *cl;
cl = ClauseCodeToStaticClause(pe->cs.p_code.FirstClause);
do {
if (IN_BLOCK(codeptr,cl,cl->ClSize)) {
return cl->ClCode;
}
if (cl->ClCode == pe->cs.p_code.LastClause)
break;
cl = cl->ClNext;
} while (TRUE);
Yap_Error(SYSTEM_ERROR,TermNil,"could not find clause for indexing code");
return(NULL);
}
static yamop *cur_log_upd_clause(PredEntry *pe, yamop *codeptr)
{
LogUpdClause *cl;
cl = ClauseCodeToLogUpdClause(pe->cs.p_code.FirstClause);
do {
if (IN_BLOCK(codeptr,cl->ClCode,cl->ClSize)) {
return((yamop *)cl->ClCode);
}
cl = cl->ClNext;
} while (cl != NULL);
Yap_Error(SYSTEM_ERROR,TermNil,"could not find clause for indexing code");
return(NULL);
}
bool
Yap_search_for_static_predicate_in_use(PredEntry *p, bool check_everything)
{
choiceptr b_ptr = B;
CELL *env_ptr = ENV;
if (check_everything && P) {
PredEntry *pe = EnvPreg(P);
if (p == pe) return true;
pe = EnvPreg(CP);
if (p == pe) return true;
}
do {
PredEntry *pe;
/* check first environments that are younger than our latest choicepoint */
if (check_everything && env_ptr) {
/*
I do not need to check environments for asserts,
only for retracts
*/
while (env_ptr && b_ptr > (choiceptr)env_ptr) {
yamop *cp = (yamop *)env_ptr[E_CP];
PredEntry *pe;
pe = EnvPreg(cp);
if (p == pe) return true;
if (env_ptr != NULL)
env_ptr = (CELL *)(env_ptr[E_E]);
}
}
/* now mark the choicepoint */
if (b_ptr)
pe = PredForChoicePt(b_ptr->cp_ap, NULL);
else
return false;
if (pe == p) {
if (check_everything)
return true;
PELOCK(38,p);
if (p->PredFlags & IndexedPredFlag) {
yamop *code_p = b_ptr->cp_ap;
yamop *code_beg = p->cs.p_code.TrueCodeOfPred;
/* FIX ME */
if (p->PredFlags & LogUpdatePredFlag) {
LogUpdIndex *cl = ClauseCodeToLogUpdIndex(code_beg);
if (find_owner_log_index(cl, code_p))
b_ptr->cp_ap = cur_log_upd_clause(pe, b_ptr->cp_ap->y_u.Otapl.d);
} else if (p->PredFlags & MegaClausePredFlag) {
StaticIndex *cl = ClauseCodeToStaticIndex(code_beg);
if (find_owner_static_index(cl, code_p))
b_ptr->cp_ap = cur_clause(pe, b_ptr->cp_ap->y_u.Otapl.d);
} else {
/* static clause */
StaticIndex *cl = ClauseCodeToStaticIndex(code_beg);
if (find_owner_static_index(cl, code_p)) {
b_ptr->cp_ap = cur_clause(pe, b_ptr->cp_ap->y_u.Otapl.d);
}
}
}
UNLOCKPE(63,pe);
}
env_ptr = b_ptr->cp_env;
b_ptr = b_ptr->cp_b;
} while (b_ptr != NULL);
return(FALSE);
}
static void
mark_pred(int mark, PredEntry *pe)
{
/* if the predicate is static mark it */
if (pe->ModuleOfPred) {
PELOCK(39,p);
if (mark) {
pe->PredFlags |= InUsePredFlag;
} else {
pe->PredFlags &= ~InUsePredFlag;
}
UNLOCK(pe->PELock);
}
}
/* go up the chain of choice_points and environments,
marking all static predicates that current execution is depending
upon */
static void
do_toggle_static_predicates_in_use(int mask)
{
choiceptr b_ptr = B;
CELL *env_ptr = ENV;
if (b_ptr == NULL)
return;
do {
PredEntry *pe;
/* check first environments that are younger than our latest choicepoint */
while (b_ptr > (choiceptr)env_ptr) {
PredEntry *pe = EnvPreg((yamop *)env_ptr[E_CP]);
mark_pred(mask, pe);
env_ptr = (CELL *)(env_ptr[E_E]);
}
/* now mark the choicepoint */
if ((b_ptr)) {
if ((pe = PredForChoicePt(b_ptr->cp_ap, NULL))) {
mark_pred(mask, pe);
}
}
env_ptr = b_ptr->cp_env;
b_ptr = b_ptr->cp_b;
} while (b_ptr != NULL);
/* mark or unmark all predicates */
STATIC_PREDICATES_MARKED = mask;
}
static Int
toggle_static_predicates_in_use( USES_REGS1 )
{
#if !defined(YAPOR) && !defined(THREADS)
Term t = Deref(ARG1);
Int mask;
/* find out whether we need to mark or unmark */
if (IsVarTerm(t)) {
Yap_Error(INSTANTIATION_ERROR,t,"toggle_static_predicates_in_use/1");
return(FALSE);
}
if (!IsIntTerm(t)) {
Yap_Error(TYPE_ERROR_INTEGER,t,"toggle_static_predicates_in_use/1");
return(FALSE);
} else {
mask = IntOfTerm(t);
}
do_toggle_static_predicates_in_use(mask);
#endif
return TRUE;
}
#endif /* !defined(YAPOR) && !defined(THREADS) */
static void
clause_was_found(PredEntry *pp, Atom *pat, UInt *parity) {
if (pp->ModuleOfPred == IDB_MODULE) {
if (pp->PredFlags & NumberDBPredFlag) {
*parity = 0;
*pat = AtomInteger;
} else if (pp->PredFlags & AtomDBPredFlag) {
*parity = 0;
*pat = (Atom)pp->FunctorOfPred;
} else {
*pat = NameOfFunctor(pp->FunctorOfPred);
*parity = ArityOfFunctor(pp->FunctorOfPred);
}
} else {
*parity = pp->ArityOfPE;
if (pp->ArityOfPE) {
*pat = NameOfFunctor(pp->FunctorOfPred);
} else {
*pat = (Atom)(pp->FunctorOfPred);
}
}
}
static void
code_in_pred_info(PredEntry *pp, Atom *pat, UInt *parity) {
clause_was_found(pp, pat, parity);
}
static int
code_in_pred_lu_index(LogUpdIndex *icl, yamop *codeptr, CODEADDR *startp, CODEADDR *endp) {
LogUpdIndex *cicl;
if (IN_BLOCK(codeptr,icl,icl->ClSize)) {
if (startp) *startp = (CODEADDR)icl;
if (endp) *endp = (CODEADDR)icl+icl->ClSize;
return TRUE;
}
cicl = icl->ChildIndex;
while (cicl != NULL) {
if (code_in_pred_lu_index(cicl, codeptr, startp, endp))
return TRUE;
cicl = cicl->SiblingIndex;
}
return FALSE;
}
static int
code_in_pred_s_index(StaticIndex *icl, yamop *codeptr, CODEADDR *startp, CODEADDR *endp) {
StaticIndex *cicl;
if (IN_BLOCK(codeptr,icl,icl->ClSize)) {
if (startp) *startp = (CODEADDR)icl;
if (endp) *endp = (CODEADDR)icl+icl->ClSize;
return TRUE;
}
cicl = icl->ChildIndex;
while (cicl != NULL) {
if (code_in_pred_s_index(cicl, codeptr, startp, endp))
return TRUE;
cicl = cicl->SiblingIndex;
}
return FALSE;
}
static Int
find_code_in_clause(PredEntry *pp, yamop *codeptr, CODEADDR *startp, CODEADDR *endp) {
Int i = 1;
yamop *clcode;
clcode = pp->cs.p_code.FirstClause;
if (clcode != NULL) {
if (pp->PredFlags & LogUpdatePredFlag) {
LogUpdClause *cl = ClauseCodeToLogUpdClause(clcode);
do {
if (IN_BLOCK(codeptr,(CODEADDR)cl,cl->ClSize)) {
if (startp)
*startp = (CODEADDR)cl;
if (endp)
*endp = (CODEADDR)cl+cl->ClSize;
return i;
}
i++;
cl = cl->ClNext;
} while (cl != NULL);
} else if (pp->PredFlags & DynamicPredFlag) {
do {
DynamicClause *cl;
cl = ClauseCodeToDynamicClause(clcode);
if (IN_BLOCK(codeptr,cl,cl->ClSize)) {
if (startp)
*startp = (CODEADDR)cl;
if (endp)
*endp = (CODEADDR)cl+cl->ClSize;
return i;
}
if (clcode == pp->cs.p_code.LastClause)
break;
i++;
clcode = NextDynamicClause(clcode);
} while (TRUE);
} else if (pp->PredFlags & MegaClausePredFlag) {
MegaClause *cl;
cl = ClauseCodeToMegaClause(clcode);
if (IN_BLOCK(codeptr,cl,cl->ClSize)) {
if (startp)
*startp = (CODEADDR)cl;
if (endp)
*endp = (CODEADDR)cl+cl->ClSize;
return 1+((char *)codeptr-(char *)cl->ClCode)/cl->ClItemSize;
}
} else {
StaticClause *cl;
cl = ClauseCodeToStaticClause(clcode);
do {
if (IN_BLOCK(codeptr,cl,cl->ClSize)) {
if (startp)
*startp = (CODEADDR)cl;
if (endp)
*endp = (CODEADDR)cl+cl->ClSize;
return i;
}
if (cl->ClCode == pp->cs.p_code.LastClause)
break;
i++;
cl = cl->ClNext;
} while (TRUE);
}
}
return(0);
}
static Term
clause_loc(void *clcode, PredEntry *pp) {
if (pp->PredFlags & LogUpdatePredFlag) {
LogUpdClause *cl = ClauseCodeToLogUpdClause(clcode);
cl = ClauseCodeToLogUpdClause(clcode);
if (cl->ClFlags & FactMask) {
return MkIntTerm(cl->lusl.ClLine);
} else {
return MkIntTerm(cl->lusl.ClSource->ag.line_number);
}
} else if (pp->PredFlags & DynamicPredFlag) {
DynamicClause *cl;
cl = ClauseCodeToDynamicClause(clcode);
return TermNil;
} else if (pp->PredFlags & MegaClausePredFlag) {
MegaClause *mcl = ClauseCodeToMegaClause(pp->cs.p_code.FirstClause);
return MkIntTerm(mcl->ClLine);
} else {
StaticClause *cl;
cl = ClauseCodeToStaticClause(clcode);
if (cl->ClFlags & FactMask) {
return MkIntTerm(cl->usc.ClLine);
} else if (cl->ClFlags & SrcMask) {
return MkIntTerm(cl->usc.ClSource->ag.line_number);
} else
return TermNil;
}
return TermNil;
}
static int
cl_code_in_pred(PredEntry *pp, yamop *codeptr, CODEADDR *startp, CODEADDR *endp) {
Int out;
PELOCK(39,pp);
/* check if the codeptr comes from the indexing code */
if (pp->PredFlags & IndexedPredFlag) {
if (pp->PredFlags & LogUpdatePredFlag) {
if (code_in_pred_lu_index(ClauseCodeToLogUpdIndex(pp->cs.p_code.TrueCodeOfPred), codeptr, startp, endp)) {
UNLOCK(pp->PELock);
return TRUE;
}
} else {
if (code_in_pred_s_index(ClauseCodeToStaticIndex(pp->cs.p_code.TrueCodeOfPred), codeptr, startp, endp)) {
UNLOCK(pp->PELock);
return TRUE;
}
}
}
if (pp->PredFlags & (CPredFlag|AsmPredFlag|UserCPredFlag)) {
StaticClause *cl = ClauseCodeToStaticClause(pp->CodeOfPred);
if (IN_BLOCK(codeptr,(CODEADDR)cl,cl->ClSize)) {
if (startp)
*startp = (CODEADDR)cl;
if (endp)
*endp = (CODEADDR)cl+cl->ClSize;
UNLOCK(pp->PELock);
return TRUE;
} else {
UNLOCK(pp->PELock);
return FALSE;
}
} else {
out = find_code_in_clause(pp, codeptr, startp, endp);
}
UNLOCK(pp->PELock);
if (out) return TRUE;
return FALSE;
}
static Int
code_in_pred(PredEntry *pp, Atom *pat, UInt *parity, yamop *codeptr) {
Int out;
PELOCK(40,pp);
/* check if the codeptr comes from the indexing code */
if (pp->PredFlags & IndexedPredFlag) {
if (pp->PredFlags & LogUpdatePredFlag) {
if (code_in_pred_lu_index(ClauseCodeToLogUpdIndex(pp->cs.p_code.TrueCodeOfPred), codeptr, NULL, NULL)) {
code_in_pred_info(pp, pat, parity);
UNLOCK(pp->PELock);
return -1;
}
} else {
if (code_in_pred_s_index(ClauseCodeToStaticIndex(pp->cs.p_code.TrueCodeOfPred), codeptr, NULL, NULL)) {
code_in_pred_info(pp, pat, parity);
UNLOCK(pp->PELock);
return -1;
}
}
}
if ((out = find_code_in_clause(pp, codeptr, NULL, NULL))) {
clause_was_found(pp, pat, parity);
}
UNLOCK(pp->PELock);
return out;
}
static Int
PredForCode(yamop *codeptr, Atom *pat, UInt *parity, Term *pmodule) {
Int found = 0;
ModEntry *me = CurrentModules;
/* should we allow the user to see hidden predicates? */
while (me) {
PredEntry *pp;
pp = me->PredForME;
while (pp != NULL) {
if ((found = code_in_pred(pp, pat, parity, codeptr)) != 0) {
if (pmodule)
*pmodule = MkAtomTerm(me->AtomOfME);
return found;
}
pp = pp->NextPredOfModule;
}
me = me->NextME;
}
return(0);
}
Int
Yap_PredForCode(yamop *codeptr, find_pred_type where_from, Atom *pat, UInt *parity, Term *pmodule) {
PredEntry *p;
if (where_from == FIND_PRED_FROM_CP) {
p = PredForChoicePt(codeptr, NULL);
} else if (where_from == FIND_PRED_FROM_ENV) {
p = EnvPreg(codeptr);
if (p) {
Int out;
if (p->ModuleOfPred == PROLOG_MODULE)
*pmodule = TermProlog;
else
*pmodule = p->ModuleOfPred;
out = find_code_in_clause(p, codeptr, NULL, NULL);
clause_was_found(p, pat, parity);
return out;
}
} else {
return PredForCode(codeptr, pat, parity, pmodule);
}
if (p == NULL) {
return 0;
}
clause_was_found(p, pat, parity);
if (p->ModuleOfPred == PROLOG_MODULE)
*pmodule = TermProlog;
else
*pmodule = p->ModuleOfPred;
return -1;
}
/* intruction blocks we found ourselves at */
static PredEntry *
walk_got_lu_block(LogUpdIndex *cl, CODEADDR *startp, CODEADDR *endp)
{
PredEntry *pp = cl->ClPred;
*startp = (CODEADDR)cl;
*endp = (CODEADDR)cl+cl->ClSize;
return pp;
}
/* intruction blocks we found ourselves at */
static PredEntry *
walk_got_lu_clause(LogUpdClause *cl, CODEADDR *startp, CODEADDR *endp)
{
*startp = (CODEADDR)cl;
*endp = (CODEADDR)cl+cl->ClSize;
return cl->ClPred;
}
/* we hit a meta-call, so we don't know what is happening */
static PredEntry *
found_meta_call(CODEADDR *startp, CODEADDR *endp)
{
PredEntry *pp = PredMetaCall;
*startp = (CODEADDR)&(pp->OpcodeOfPred);
*endp = (CODEADDR)NEXTOP((yamop *)&(pp->OpcodeOfPred),e);
return pp;
}
/* intruction blocks we found ourselves at */
static PredEntry *
walk_found_c_pred(PredEntry *pp, CODEADDR *startp, CODEADDR *endp)
{
StaticClause *cl = ClauseCodeToStaticClause(pp->CodeOfPred);
*startp = (CODEADDR)&(cl->ClCode);
*endp = (CODEADDR)&(cl->ClCode)+cl->ClSize;
return pp;
}
/* we hit a mega-clause, no point in going on */
static PredEntry *
found_mega_clause(PredEntry *pp, CODEADDR *startp, CODEADDR *endp)
{
MegaClause *mcl = ClauseCodeToMegaClause(pp->cs.p_code.FirstClause);
*startp = (CODEADDR)mcl;
*endp = (CODEADDR)mcl+mcl->ClSize;
return pp;
}
/* we hit a mega-clause, no point in going on */
static PredEntry *
found_idb_clause(yamop *pc, CODEADDR *startp, CODEADDR *endp)
{
LogUpdClause *cl = ClauseCodeToLogUpdClause(pc);
*startp = (CODEADDR)cl;
*endp = (CODEADDR)cl+cl->ClSize;
return cl->ClPred;
}
/* we hit a expand_index, no point in going on */
static PredEntry *
found_expand_index(yamop *pc, CODEADDR *startp, CODEADDR *endp, yamop *codeptr USES_REGS)
{
PredEntry *pp = codeptr->y_u.sssllp.p;
if (pc == codeptr) {
*startp = (CODEADDR)codeptr;
*endp = (CODEADDR)NEXTOP(codeptr,sssllp);
}
return pp;
}
/* we hit a expand_index, no point in going on */
static PredEntry *
found_fail(yamop *pc, CODEADDR *startp, CODEADDR *endp USES_REGS)
{
PredEntry *pp = RepPredProp(Yap_GetPredPropByAtom(AtomFail,CurrentModule));
*startp = *endp = (CODEADDR)FAILCODE;
return pp;
}
/* we hit a expand_index, no point in going on */
static PredEntry *
found_owner_op(yamop *pc, CODEADDR *startp, CODEADDR *endp USES_REGS)
{
PredEntry *pp = ((PredEntry *)(Unsigned(pc)-(CELL)(&(((PredEntry *)NULL)->OpcodeOfPred))));
*startp = (CODEADDR)&(pp->OpcodeOfPred);
*endp = (CODEADDR)NEXTOP((yamop *)&(pp->OpcodeOfPred),e);
return pp;
}
/* we hit a expand_index, no point in going on */
static PredEntry *
found_expand(yamop *pc, CODEADDR *startp, CODEADDR *endp USES_REGS)
{
PredEntry *pp = ((PredEntry *)(Unsigned(pc)-(CELL)(&(((PredEntry *)NULL)->cs.p_code.ExpandCode))));
*startp = (CODEADDR)&(pp->cs.p_code.ExpandCode);
*endp = (CODEADDR)NEXTOP((yamop *)&(pp->cs.p_code.ExpandCode),e);
return pp;
}
static PredEntry *
found_ystop(yamop *pc, int clause_code, CODEADDR *startp, CODEADDR *endp, PredEntry *pp USES_REGS)
{
if (pc == YESCODE) {
pp = RepPredProp(Yap_GetPredPropByAtom(AtomTrue,CurrentModule));
*startp = (CODEADDR)YESCODE;
*endp = (CODEADDR)YESCODE+(CELL)(NEXTOP((yamop *)NULL,e));
return pp;
}
if (!pp) {
/* must be an index */
PredEntry **pep = (PredEntry **)pc->y_u.l.l;
pp = pep[-1];
}
if (pp->PredFlags & LogUpdatePredFlag) {
if (clause_code) {
LogUpdClause *cl = ClauseCodeToLogUpdClause(pc->y_u.l.l);
*startp = (CODEADDR)cl;
*endp = (CODEADDR)cl+cl->ClSize;
} else {
LogUpdIndex *cl = ClauseCodeToLogUpdIndex(pc->y_u.l.l);
*startp = (CODEADDR)cl;
*endp = (CODEADDR)cl+cl->ClSize;
}
} else if (pp->PredFlags & DynamicPredFlag) {
DynamicClause *cl = ClauseCodeToDynamicClause(pc->y_u.l.l);
*startp = (CODEADDR)cl;
*endp = (CODEADDR)cl+cl->ClSize;
} else {
if (clause_code) {
StaticClause *cl = ClauseCodeToStaticClause(pc->y_u.l.l);
*startp = (CODEADDR)cl;
*endp = (CODEADDR)cl+cl->ClSize;
} else {
StaticIndex *cl = ClauseCodeToStaticIndex(pc->y_u.l.l);
*startp = (CODEADDR)cl;
*endp = (CODEADDR)cl+cl->ClSize;
}
}
return pp;
}
static PredEntry *
ClauseInfoForCode(yamop *codeptr, CODEADDR *startp, CODEADDR *endp USES_REGS) {
yamop *pc;
PredEntry *pp = NULL;
int clause_code = FALSE;
if (codeptr >= COMMA_CODE &&
codeptr < FAILCODE) {
pp = RepPredProp(Yap_GetPredPropByFunc(FunctorComma,CurrentModule));
*startp = (CODEADDR)COMMA_CODE;
*endp = (CODEADDR)(FAILCODE-1);
return pp;
}
pc = codeptr;
#include "walkclause.h"
return NULL;
}
PredEntry *
Yap_PredEntryForCode(yamop *codeptr, find_pred_type where_from, CODEADDR *startp, CODEADDR *endp) {
CACHE_REGS
if (where_from == FIND_PRED_FROM_CP) {
PredEntry *pp = PredForChoicePt(codeptr, NULL);
if (cl_code_in_pred(pp, codeptr, startp, endp)) {
return pp;
}
} else if (where_from == FIND_PRED_FROM_ENV) {
PredEntry *pp = EnvPreg(codeptr);
if (cl_code_in_pred(pp, codeptr, startp, endp)) {
return pp;
}
} else {
return ClauseInfoForCode(codeptr, startp, endp PASS_REGS);
}
return NULL;
}
/**
* Detect whether the predicate describing the goal in A1,
* module A2 is currently live in the stack.
*
* @param USES_REGS1
*
* @return liveness
*/
static Int
in_use( USES_REGS1 )
{ /* '$in_use'(+P,+Mod) */
PredEntry *pe;
Int out;
pe = get_pred(Deref(ARG1), Deref(ARG2), "$in_use");
if (EndOfPAEntr(pe))
return FALSE;
PELOCK(25,pe);
out = Yap_static_in_use(pe,TRUE);
UNLOCKPE(42,pe);
return(out);
}
static Int
pred_for_code( USES_REGS1 ) {
yamop *codeptr;
Atom at;
arity_t arity;
Term tmodule = TermProlog;
Int cl;
Term t = Deref(ARG1);
if (IsVarTerm(t)) {
return FALSE;
} else if (IsApplTerm(t) && FunctorOfTerm(t) == FunctorStaticClause) {
codeptr = Yap_ClauseFromTerm(t)->ClCode;
} else if (IsIntegerTerm(t)) {
codeptr = (yamop *)IntegerOfTerm(t);
} else if (IsDBRefTerm(t)) {
codeptr = (yamop *)DBRefOfTerm(t);
} else {
return FALSE;
}
cl = PredForCode(codeptr, &at, &arity, &tmodule);
if (!tmodule) tmodule = TermProlog;
if (cl == 0) {
return Yap_unify(ARG5,MkIntTerm(0));
} else {
return(Yap_unify(ARG2,MkAtomTerm(at)) &&
Yap_unify(ARG3,MkIntegerTerm(arity)) &&
Yap_unify(ARG4,tmodule) &&
Yap_unify(ARG5,MkIntegerTerm(cl)));
}
}
static LogUpdIndex *
find_owner_log_index(LogUpdIndex *cl, yamop *code_p)
{
yamop *code_beg = cl->ClCode;
yamop *code_end = (yamop *)((char *)cl + cl->ClSize);
if (code_p >= code_beg && code_p <= code_end) {
return cl;
}
cl = cl->ChildIndex;
while (cl != NULL) {
LogUpdIndex *out;
if ((out = find_owner_log_index(cl, code_p)) != NULL) {
return out;
}
cl = cl->SiblingIndex;
}
return NULL;
}
static StaticIndex *
find_owner_static_index(StaticIndex *cl, yamop *code_p)
{
yamop *code_beg = cl->ClCode;
yamop *code_end = (yamop *)((char *)cl + cl->ClSize);
if (code_p >= code_beg && code_p <= code_end) {
return cl;
}
cl = cl->ChildIndex;
while (cl != NULL) {
StaticIndex *out;
if ((out = find_owner_static_index(cl, code_p)) != NULL) {
return out;
}
cl = cl->SiblingIndex;
}
return NULL;
}
ClauseUnion *
Yap_find_owner_index(yamop *ipc, PredEntry *ap)
{
/* we assume we have an owner index */
if (ap->PredFlags & LogUpdatePredFlag) {
LogUpdIndex *cl = ClauseCodeToLogUpdIndex(ap->cs.p_code.TrueCodeOfPred);
return (ClauseUnion *)find_owner_log_index(cl,ipc);
} else {
StaticIndex *cl = ClauseCodeToStaticIndex(ap->cs.p_code.TrueCodeOfPred);
return (ClauseUnion *)find_owner_static_index(cl,ipc);
}
}
static Term
all_envs(CELL *env_ptr USES_REGS)
{
Term tf = AbsPair(HR);
CELL *start = HR;
CELL *bp = NULL;
/* walk the environment chain */
while (env_ptr) {
bp = HR;
HR += 2;
/* notice that MkIntegerTerm may increase the HReap */
bp[0] = MkIntegerTerm(LCL0-env_ptr);
if (HR >= ASP-1024) {
HR = start;
LOCAL_Error_Size = (ASP-1024)-HR;
while (env_ptr) {
LOCAL_Error_Size += 2;
env_ptr = (CELL *)(env_ptr[E_E]);
}
return 0L;
} else {
bp[1] = AbsPair(HR);
}
env_ptr = (CELL *)(env_ptr[E_E]);
}
bp[1] = TermNil;
return tf;
}
static Term
all_cps(choiceptr b_ptr USES_REGS)
{
CELL *bp = NULL;
CELL *start = HR;
Term tf = AbsPair(HR);
while (b_ptr) {
bp = HR;
HR += 2;
/* notice that MkIntegerTerm may increase the HReap */
bp[0] = MkIntegerTerm((Int)(LCL0-(CELL *)b_ptr));
if (HR >= ASP-1024) {
HR = start;
LOCAL_Error_Size = (ASP-1024)-HR;
while (b_ptr) {
LOCAL_Error_Size += 2;
b_ptr = b_ptr->cp_b;
}
return 0L;
} else {
bp[1] = AbsPair(HR);
}
b_ptr = b_ptr->cp_b;
}
bp[1] = TermNil;
return tf;
}
static Int
p_all_choicepoints( USES_REGS1 )
{
Term t;
while ((t = all_cps(B PASS_REGS)) == 0L) {
if (!Yap_gcl(LOCAL_Error_Size, 1, ENV, gc_P(P,CP))) {
Yap_Error(OUT_OF_STACK_ERROR, TermNil, "while dumping choicepoints");
return FALSE;
}
}
return Yap_unify(ARG1,t);
}
static Int
p_all_envs( USES_REGS1 )
{
Term t;
while ((t = all_envs(ENV PASS_REGS)) == 0L) {
if (!Yap_gcl(LOCAL_Error_Size, 1, ENV, gc_P(P,CP))) {
Yap_Error(OUT_OF_STACK_ERROR, TermNil, "while dumping environments");
return FALSE;
}
}
return Yap_unify(ARG1,t);
}
Term
clause_info ( yamop *codeptr, PredEntry *pp) {
Term ts[2];
CODEADDR begin;
if (pp->ArityOfPE == 0) {
ts[0] = MkAtomTerm((Atom)pp->FunctorOfPred);
ts[1] = MkIntTerm(0);
} else {
ts[0] = MkAtomTerm(NameOfFunctor( pp->FunctorOfPred));
ts[1] = MkIntegerTerm(pp->ArityOfPE);
}
ts[0] = MkAtomTerm(pp->src.OwnerFile);
Term t1 = Yap_MkApplTerm( FunctorModule, 2, ts);
if (find_code_in_clause(pp, codeptr, &begin, NULL) <= 0 ||
((ts[0] = clause_loc(begin, pp) == TermNil ))) {
ts[0] = clause_loc(pp->cs.p_code.FirstClause, pp);
ts[1] = clause_loc(pp->cs.p_code.LastClause, pp);
if (ts[0] == ts[1] && ts[1] != TermNil)
{}
else if (ts[1]== TermNil && ts[0] != TermNil)
ts[0] = Yap_MkApplTerm( FunctorMinus, 2, ts);
}
ts[1] = t1;
return Yap_MkApplTerm( FunctorModule, 2, ts );
}
static Term
error_culprit(bool internal USES_REGS)
{
PredEntry *pe;
// case number 1: Yap_Error called from built-in.
if (internal) {
pe = EnvPreg(CP);
if (pe->PredFlags & HiddenPredFlag) return clause_info(P, pe);
} else {
CELL * curENV = ENV;
yamop *curCP = CP;
PredEntry *pe = EnvPreg(curCP);
while (curCP != YESCODE) {
if (pe->ModuleOfPred) return clause_info(P, pe);
curENV = (CELL *)(curENV[E_E]);
curCP = (yamop *)(curENV[E_CP]);
pe = EnvPreg(curCP);
}
}
return TermNil;
}
static Term
all_calls( bool internal USES_REGS )
{
Term ts[6];
Functor f = Yap_MkFunctor(AtomLocalSp,6);
// The first argument is key: it tries to
// catch the culprit at the user level,
ts[0] = error_culprit(internal PASS_REGS);
ts[1] = MkAddressTerm(P);
ts[2] = MkAddressTerm(CP);
ts[3] = MkAddressTerm(PP);
if (trueLocalPrologFlag(STACK_DUMP_ON_ERROR_FLAG)) {
ts[4] = all_envs(ENV PASS_REGS);
ts[5] = all_cps(B PASS_REGS);
if (ts[4] == 0L ||
ts[5] == 0L)
return 0L;
} else {
ts[4] = ts[5] = TermNil;
}
return Yap_MkApplTerm(f,6,ts);
}
/**
* report the current status of the stacks up to level $N$
*
* @param depth
*
* @return data on the current program counter
*/
Term
Yap_all_calls( void )
{
CACHE_REGS
return all_calls( true PASS_REGS1 );
}
static Int
current_stack( USES_REGS1 )
{
Term t;
while ((t = all_calls( false PASS_REGS1 )) == 0L) {
if (!Yap_gcl(LOCAL_Error_Size, 1, ENV, gc_P(P,CP))) {
Yap_Error(OUT_OF_STACK_ERROR, TermNil, "while dumping stack");
return FALSE;
}
}
return Yap_unify(ARG1,t);
}
#if LOW_PROF
static void
add_code_in_lu_index(LogUpdIndex *cl, PredEntry *pp)
{
char *code_end = (char *)cl + cl->ClSize;
Yap_inform_profiler_of_clause(cl, code_end, pp, GPROF_LU_INDEX);
cl = cl->ChildIndex;
while (cl != NULL) {
add_code_in_lu_index(cl, pp);
cl = cl->SiblingIndex;
}
}
static void
add_code_in_static_index(StaticIndex *cl, PredEntry *pp)
{
char *code_end = (char *)cl + cl->ClSize;
Yap_inform_profiler_of_clause(cl, code_end, pp, GPROF_STATIC_INDEX);
cl = cl->ChildIndex;
while (cl != NULL) {
add_code_in_static_index(cl, pp);
cl = cl->SiblingIndex;
}
}
static void
add_code_in_pred(PredEntry *pp) {
yamop *clcode;
PELOCK(49,pp);
/* check if the codeptr comes from the indexing code */
/* highly likely this is used for indexing */
Yap_inform_profiler_of_clause(&(pp->OpcodeOfPred), &(pp->OpcodeOfPred)+1, pp, GPROF_INIT_OPCODE);
if (pp->PredFlags & (CPredFlag|AsmPredFlag)) {
char *code_end;
StaticClause *cl;
clcode = pp->CodeOfPred;
cl = ClauseCodeToStaticClause(clcode);
code_end = (char *)cl + cl->ClSize;
Yap_inform_profiler_of_clause(cl, code_end, pp, GPROF_INIT_SYSTEM_CODE);
UNLOCK(pp->PELock);
return;
}
Yap_inform_profiler_of_clause(&(pp->cs.p_code.ExpandCode), &(pp->cs.p_code.ExpandCode)+1, pp, GPROF_INIT_EXPAND);
clcode = pp->cs.p_code.TrueCodeOfPred;
if (pp->PredFlags & IndexedPredFlag) {
if (pp->PredFlags & LogUpdatePredFlag) {
LogUpdIndex *cl = ClauseCodeToLogUpdIndex(clcode);
add_code_in_lu_index(cl, pp);
} else {
StaticIndex *cl = ClauseCodeToStaticIndex(clcode);
add_code_in_static_index(cl, pp);
}
}
clcode = pp->cs.p_code.FirstClause;
if (clcode != NULL) {
if (pp->PredFlags & LogUpdatePredFlag) {
LogUpdClause *cl = ClauseCodeToLogUpdClause(clcode);
do {
char *code_end;
code_end = (char *)cl + cl->ClSize;
Yap_inform_profiler_of_clause(cl, code_end, pp, GPROF_INIT_LOG_UPD_CLAUSE);
cl = cl->ClNext;
} while (cl != NULL);
} else if (pp->PredFlags & DynamicPredFlag) {
do {
DynamicClause *cl;
CODEADDR code_end;
cl = ClauseCodeToDynamicClause(clcode);
code_end = (CODEADDR)cl + cl->ClSize;
Yap_inform_profiler_of_clause(cl, code_end, pp, GPROF_INIT_DYNAMIC_CLAUSE);
if (clcode == pp->cs.p_code.LastClause)
break;
clcode = NextDynamicClause(clcode);
} while (TRUE);
} else {
StaticClause *cl = ClauseCodeToStaticClause(clcode);
do {
char *code_end;
code_end = (char *)cl + cl->ClSize;
Yap_inform_profiler_of_clause(cl, code_end, pp,GPROF_INIT_STATIC_CLAUSE);
if (cl->ClCode == pp->cs.p_code.LastClause)
break;
cl = cl->ClNext;
} while (TRUE);
}
}
UNLOCK(pp->PELock);
}
void
Yap_dump_code_area_for_profiler(void) {
ModEntry *me = CurrentModules;
while (me) {
PredEntry *pp = me->PredForME;
while (pp != NULL) {
/* if (pp->ArityOfPE) {
fprintf(stderr,"%s/%d %p\n",
RepAtom(NameOfFunctor(pp->FunctorOfPred))->StrOfAE,
pp->ArityOfPE,
pp);
} else {
fprintf(stderr,"%s %p\n",
RepAtom((Atom)(pp->FunctorOfPred))->StrOfAE,
pp);
}*/
add_code_in_pred(pp);
pp = pp->NextPredOfModule;
}
me = me->NextME;
}
Yap_inform_profiler_of_clause(COMMA_CODE, FAILCODE, RepPredProp(Yap_GetPredPropByFunc(FunctorComma,0)), GPROF_INIT_COMMA);
Yap_inform_profiler_of_clause(FAILCODE, FAILCODE+1, RepPredProp(Yap_GetPredPropByAtom(AtomFail,0)), GPROF_INIT_FAIL);
}
#endif /* LOW_PROF */
static Int
program_continuation( USES_REGS1 )
{
PredEntry *pe = EnvPreg((yamop *)((ENV_Parent(ENV))[E_CP]));
if (pe->ModuleOfPred) {
if (!Yap_unify(ARG1,pe->ModuleOfPred))
return FALSE;
} else {
if (!Yap_unify(ARG1,TermProlog))
return FALSE;
}
if (pe->ArityOfPE) {
if (!Yap_unify(ARG2,MkAtomTerm(NameOfFunctor(pe->FunctorOfPred))))
return FALSE;
if (!Yap_unify(ARG3,MkIntegerTerm(ArityOfFunctor(pe->FunctorOfPred))))
return FALSE;
} else {
if (!Yap_unify(ARG2,MkAtomTerm((Atom)pe->FunctorOfPred)))
return FALSE;
if (!Yap_unify(ARG3,MkIntTerm(0)))
return FALSE;
}
return TRUE;
}
static Term
BuildActivePred(PredEntry *ap, CELL *vect)
{
CACHE_REGS
arity_t i;
if (!ap->ArityOfPE) {
return MkVarTerm();
}
for (i = 0; i < ap->ArityOfPE; i++) {
Term t = Deref(vect[i]);
if (IsVarTerm(t)) {
CELL *pt = VarOfTerm(t);
/* one stack */
if (pt > HR) {
Term nt = MkVarTerm();
Yap_unify(t, nt);
}
}
}
return Yap_MkApplTerm(ap->FunctorOfPred, ap->ArityOfPE, vect);
}
static int
UnifyPredInfo(PredEntry *pe, int start_arg USES_REGS) {
arity_t arity = pe->ArityOfPE;
Term tmod, tname;
if (pe->ModuleOfPred != IDB_MODULE) {
if (pe->ModuleOfPred == PROLOG_MODULE) {
tmod = TermProlog;
} else {
tmod = pe->ModuleOfPred;
}
if (pe->ArityOfPE == 0) {
tname = MkAtomTerm((Atom)pe->FunctorOfPred);
} else {
Functor f = pe->FunctorOfPred;
tname = MkAtomTerm(NameOfFunctor(f));
}
} else {
tmod = pe->ModuleOfPred;
if (pe->PredFlags & NumberDBPredFlag) {
tname = MkIntegerTerm(pe->src.IndxId);
} else if (pe->PredFlags & AtomDBPredFlag) {
tname = MkAtomTerm((Atom)pe->FunctorOfPred);
} else {
Functor f = pe->FunctorOfPred;
tname = MkAtomTerm(NameOfFunctor(f));
}
}
return Yap_unify(XREGS[start_arg], tmod) &&
Yap_unify(XREGS[start_arg+1],tname) &&
Yap_unify(XREGS[start_arg+2],MkIntegerTerm(arity));
}
static Int
ClauseId(yamop *ipc, PredEntry *pe)
{
if (!ipc)
return 0;
return find_code_in_clause(pe, ipc, NULL, NULL);
}
static Int
env_info( USES_REGS1 )
{
CELL *env = LCL0-IntegerOfTerm(Deref(ARG1));
yamop *env_cp;
Term env_b, taddr;
if (!env)
return FALSE;
env_b = MkIntegerTerm((Int)(LCL0-(CELL *)env[E_CB]));
env_cp = (yamop *)env[E_CP];
/* pe = PREVOP(env_cp,Osbpp)->y_u.Osbpp.p0; */
taddr = MkIntegerTerm((Int)env);
return Yap_unify(ARG3,MkIntegerTerm((Int)env_cp)) &&
Yap_unify(ARG2, taddr) &&
Yap_unify(ARG4, env_b);
}
static Int
p_cpc_info( USES_REGS1 )
{
PredEntry *pe;
yamop *ipc = (yamop *)IntegerOfTerm(Deref(ARG1));
pe = PREVOP(ipc,Osbpp)->y_u.Osbpp.p0;
return UnifyPredInfo(pe, 2 PASS_REGS) &&
Yap_unify(ARG5,MkIntegerTerm(ClauseId(ipc,pe)));
}
static Int
p_choicepoint_info( USES_REGS1 )
{
choiceptr cptr = (choiceptr)(LCL0-IntegerOfTerm(Deref(ARG1)));
PredEntry *pe = NULL;
int go_on = TRUE;
yamop *ipc = cptr->cp_ap;
yamop *ncl = NULL;
Term t = TermNil, taddr;
taddr = MkIntegerTerm((Int)cptr);
while (go_on) {
op_numbers opnum = Yap_op_from_opcode(ipc->opc);
go_on = FALSE;
switch (opnum) {
#ifdef TABLING
case _table_load_answer:
#ifdef LOW_LEVEL_TRACER
pe = LOAD_CP(cptr)->cp_pred_entry;
#else
pe = UndefCode;
#endif
t = MkVarTerm();
break;
case _table_try_answer:
case _table_retry_me:
case _table_trust_me:
case _table_retry:
case _table_trust:
case _table_completion:
#ifdef THREADS_CONSUMER_SHARING
case _table_answer_resolution_completion:
#endif /* THREADS_CONSUMER_SHARING */
#ifdef LOW_LEVEL_TRACER
#ifdef DETERMINISTIC_TABLING
if (IS_DET_GEN_CP(cptr)) {
pe = DET_GEN_CP(cptr)->cp_pred_entry;
t = MkVarTerm();
} else
#endif /* DETERMINISTIC_TABLING */
{
pe = GEN_CP(cptr)->cp_pred_entry;
t = BuildActivePred(pe, (CELL *)(GEN_CP(B) + 1));
}
#else
pe = UndefCode;
t = MkVarTerm();
#endif
break;
case _table_answer_resolution:
#ifdef LOW_LEVEL_TRACER
pe = CONS_CP(cptr)->cp_pred_entry;
#else
pe = UndefCode;
#endif
t = MkVarTerm();
break;
case _trie_trust_var:
case _trie_retry_var:
case _trie_trust_var_in_pair:
case _trie_retry_var_in_pair:
case _trie_trust_val:
case _trie_retry_val:
case _trie_trust_val_in_pair:
case _trie_retry_val_in_pair:
case _trie_trust_atom:
case _trie_retry_atom:
case _trie_trust_atom_in_pair:
case _trie_retry_atom_in_pair:
case _trie_trust_null:
case _trie_retry_null:
case _trie_trust_null_in_pair:
case _trie_retry_null_in_pair:
case _trie_trust_pair:
case _trie_retry_pair:
case _trie_trust_appl:
case _trie_retry_appl:
case _trie_trust_appl_in_pair:
case _trie_retry_appl_in_pair:
case _trie_trust_extension:
case _trie_retry_extension:
case _trie_trust_double:
case _trie_retry_double:
case _trie_trust_longint:
case _trie_retry_longint:
case _trie_trust_gterm:
case _trie_retry_gterm:
pe = UndefCode;
t = MkVarTerm();
break;
#endif /* TABLING */
case _try_logical:
case _retry_logical:
case _trust_logical:
case _count_retry_logical:
case _count_trust_logical:
case _profiled_retry_logical:
case _profiled_trust_logical:
ncl = ipc->y_u.OtaLl.d->ClCode;
pe = ipc->y_u.OtaLl.d->ClPred;
t = BuildActivePred(pe, cptr->cp_args);
break;
case _or_else:
pe = ipc->y_u.Osblp.p0;
ncl = ipc;
t = Yap_MkNewApplTerm(FunctorOr, 2);
break;
case _or_last:
#ifdef YAPOR
pe = ipc->y_u.Osblp.p0;
#else
pe = ipc->y_u.p.p;
#endif
ncl = ipc;
t = Yap_MkNewApplTerm(FunctorOr, 2);
break;
case _retry2:
case _retry3:
case _retry4:
pe = NULL;
t = TermNil;
ipc = NEXTOP(ipc,l);
if (!ncl)
ncl = ipc->y_u.Otapl.d;
go_on = TRUE;
break;
case _jump:
pe = NULL;
t = TermNil;
ipc = ipc->y_u.l.l;
go_on = TRUE;
break;
case _retry_c:
case _retry_userc:
ncl = NEXTOP(ipc,OtapFs);
pe = ipc->y_u.OtapFs.p;
t = BuildActivePred(pe, cptr->cp_args);
break;
case _retry_profiled:
case _count_retry:
pe = NULL;
t = TermNil;
ncl = ipc->y_u.Otapl.d;
ipc = NEXTOP(ipc,p);
go_on = TRUE;
break;
case _retry_me:
case _trust_me:
case _count_retry_me:
case _count_trust_me:
case _profiled_retry_me:
case _profiled_trust_me:
case _retry_and_mark:
case _profiled_retry_and_mark:
case _retry:
case _trust:
if (!ncl)
ncl = ipc->y_u.Otapl.d;
pe = ipc->y_u.Otapl.p;
t = BuildActivePred(pe, cptr->cp_args);
break;
case _retry_exo:
case _retry_all_exo:
ncl = NULL;
pe = ipc->y_u.lp.p;
t = BuildActivePred(pe, cptr->cp_args);
break;
case _Nstop:
{
Atom at = AtomLive;
t = MkAtomTerm(at);
pe = RepPredProp(PredPropByAtom(at, CurrentModule));
}
break;
case _Ystop:
default:
return FALSE;
}
}
return UnifyPredInfo(pe, 3 PASS_REGS) &&
Yap_unify(ARG2, taddr) &&
Yap_unify(ARG6,t) &&
Yap_unify(ARG7,MkIntegerTerm(ClauseId(ncl,pe)));
}
static Int /* $parent_pred(Module, Name, Arity) */
parent_pred( USES_REGS1 )
{
/* This predicate is called from the debugger.
We assume a sequence of the form a -> b */
Atom at;
arity_t arity;
Term module;
if (!PredForCode(P_before_spy, &at, &arity, &module)) {
return Yap_unify(ARG1, MkIntTerm(0)) &&
Yap_unify(ARG2, MkAtomTerm(AtomMetaCall)) &&
Yap_unify(ARG3, MkIntTerm(0));
}
return Yap_unify(ARG1, MkIntTerm(module)) &&
Yap_unify(ARG2, MkAtomTerm(at)) &&
Yap_unify(ARG3, MkIntTerm(arity));
}
void
Yap_InitStInfo(void)
{
CACHE_REGS
Term cm = CurrentModule;
Yap_InitCPred("in_use", 2, in_use, HiddenPredFlag|TestPredFlag | SafePredFlag|SyncPredFlag);
Yap_InitCPred("toggle_static_predicates_in_use", 0, toggle_static_predicates_in_use, HiddenPredFlag|SafePredFlag|SyncPredFlag);
CurrentModule = HACKS_MODULE;
Yap_InitCPred("current_choicepoints", 1, p_all_choicepoints, 0);
Yap_InitCPred("current_continuations", 1, p_all_envs, 0);
Yap_InitCPred("choicepoint", 7, p_choicepoint_info, 0);
Yap_InitCPred("continuation", 4, env_info,0);
Yap_InitCPred("cp_to_predicate", 5, p_cpc_info, 0);
CurrentModule = cm;
Yap_InitCPred("current_stack", 1, current_stack, HiddenPredFlag|SyncPredFlag);
Yap_InitCPred("pred_for_code", 5, pred_for_code, HiddenPredFlag|SyncPredFlag);
Yap_InitCPred("parent_pred", 3, parent_pred, HiddenPredFlag|SafePredFlag);
Yap_InitCPred("program_continuation", 3, program_continuation, HiddenPredFlag|SafePredFlag|SyncPredFlag);
}
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