void SMTSolver_eq::reset_method()
{
assert(settings_s.smte_s || settings_s.smtc_s);
OUTDEBUG(fprintf(stderr,"Reconstructing union find\n"));
connectivity_check.clear();
for(auto a : edge)
for(auto b : a.second)
{
int s1 = a.first;
int s2 = b.first;
OUTDEBUG(fprintf(stderr, "\t[SMT]Reseting %d-%d\n", s1, s2));
if(connectivity_check.find(s1) == nullptr)
connectivity_check.add(s1);
if(connectivity_check.find(s2) == nullptr)
connectivity_check.add(s2);
if(settings_s.smte_s)
connectivity_check.make_union(s1,s2);
else if(settings_s.smtc_s)
merge(s1,s2);
}
OUTDEBUG(fprintf(stderr,"Non equalities hold: \n"));
for(auto s1p : not_possible)
for(auto s2p : s1p.second)
{
if(connectivity_check.find(s1p.first) == nullptr)
connectivity_check.add(s1p.first);
if(connectivity_check.find(s2p.first) == nullptr)
connectivity_check.add(s2p.first);
OUTDEBUG(fprintf(stderr, "%d != %d\n", s1p.first, s2p.first));
}
}
void SMTSolver_eq::cancel_last_decision()
{
assert(settings_s.smte_s || settings_s.smtc_s);
//int last_dec_index = solver->decision_stack.size()-1;
decision last_decision = solver->decision_stack.back();
if(solver->dpll_to_smt.find(abs(last_decision.dec)) == solver->dpll_to_smt.end())
return;
smt_literal_eq* corresponding_lit = (smt_literal_eq*)solver->dpll_to_smt[abs(last_decision.dec)];
int s1 = min(corresponding_lit->left, corresponding_lit->right);
int s2 = max(corresponding_lit->left, corresponding_lit->right);
bool add_edge = ((last_decision.dec > 0) && corresponding_lit->equal) || ((last_decision.dec < 0) && !corresponding_lit->equal);
if(add_edge)
{
edge[s1].erase(s2);
edge[s2].erase(s1);
if(edge[s1].size() == 0)
edge.erase(s1);
if(edge[s2].size() == 0)
edge.erase(s2);
OUTDEBUG(fprintf(stderr,"\t[SMT]Canceling %d-%d\n", s1, s2));
return;
}
OUTDEBUG(fprintf(stderr,"\t[SMT]Canceling %d != %d\n", s1, s2));
not_possible[s1].erase(s2);
}
bool SMTSolver_eq::sig(int x, int y)
{
assert(settings_s.smtc_s);
OUTDEBUG(fprintf((stderr), "Sig1 %d %d\n", x, y));
smt_term* xt = solver->terms_mapping[x];
smt_term* yt = solver->terms_mapping[y];
assert(xt != nullptr && yt != nullptr);
if(xt->args.size() != yt->args.size())
return false;
OUTDEBUG(fprintf((stderr), "Sig2 %d %d\n", x, y));
if(xt->args.size() == 0 && xt->var != yt->var)
return false;
OUTDEBUG(fprintf((stderr), "Sig3 %d %d\n", x, y));
if(xt->s != yt->s)
return false;
OUTDEBUG(fprintf((stderr), "Sig4 %d %d\n", x, y));
for(unsigned int i = 0 ; i < xt->args.size() ; i++)
{
if(connectivity_check.find(xt->args[i].in_literal) == nullptr)
connectivity_check.add(xt->args[i].in_literal);
if(connectivity_check.find(yt->args[i].in_literal) == nullptr)
connectivity_check.add(yt->args[i].in_literal);
if(connectivity_check.find(xt->args[i].in_literal) != connectivity_check.find(yt->args[i].in_literal))
return false;
}
return true;
}
vaddr_t
VmMap::getFreeVAddr(paddr_t paddr, size_t siz)
{
MemArea *_area, *tmp_area;
size_t len, off = paddr % PAGE_SIZE;
vaddr_t vaddr;
OUTDEBUG("[ VmMap ]");
len = PAGE_ALIGN(off + siz);
_area = &this->freeareas;
do
{
if (len < _area->length)
{
vaddr = (vaddr_t) PAGE_TRUNC(_area->v_addr);
_area->v_addr += len;
_area->length -= len;
_area->length = PAGE_TRUNC(_area->length);
return vaddr;
}
_area = _area->next;
}
while (_area != &this->freeareas);
::cout << "getFree " << (int) ((len)) << "," << (int) (vaddr) << "\n";
return NULL;
}
VmMap::VmMap(kernel::mem::page::PageFactory *pNode, pgd_t _pgd)
{
OUTDEBUG("[ VmMap ] Constructor ");
ArchVmMap::setPageFactory(pNode);
ArchVmMap::setPgd(_pgd);
_init();
}
int
VmMap::mergeArea(MemArea *area)
{
MemArea *_area;
vaddr_t addr_end;
int ret;
ENTER;
OUTDEBUG("[ VmMap ]");
ret = 0;
for (_area = this->usedareas.next; _area && (_area != &this->usedareas); _area
= _area->next)
{
if (area == _area)
{
continue;
}
if (area->v_addr >= _area->v_addr && area->v_addr <= (_area->v_addr
+ _area->length))
{
addr_end = ((area->v_addr + area->length) > (_area->v_addr
+ _area->length)) ? (area->v_addr + area->length)
: (_area->v_addr + _area->length);
_area->length = addr_end - _area->v_addr;
ret = 1;
break;
}
}
EXIT;
return ret;
}
int
VmMap::mergeAllAreas(void)
{
int run;
MemArea *area, *tmp_area;
ENTER;
OUTDEBUG("[ VmMap ]");
for (area = this->usedareas.next; area && area != &this->usedareas;)
{
tmp_area = NULL;
if (mergeArea(area))
{
/* remove area from list */
area->prev->next = area->next;
area->next->prev = area->prev;
tmp_area = area;
}
area = area->next;
// if (NULL != tmp_area) kfree(tmp_area);
}
EXIT;
return 0;
}
void SMTSolver_eq::get_solution()
{
assert((settings_s.smte_s && !settings_s.smtc_s) ||
(!settings_s.smte_s && settings_s.smtc_s));
OUTDEBUG(cerr << "[SMT]Computing solution." << endl);
map<int,int> id_composante;
int id = 0;
if(settings_s.smte_s)
{
for(auto s : edge)
if(id_composante.find(s.first) == id_composante.end())
{
visite_composante(s.first, id, id_composante);
id++;
}
}
else
{
for(auto s : solver->terms_mapping)
{
if(s.first != 0 && connectivity_check.find(s.first) == nullptr)
connectivity_check.add(s.first);
if(s.first != 0 && id_composante.find(s.first) == id_composante.end())
{
visite_composante_qf(connectivity_check.find(s.first), id, id_composante);
id++;
}
}
}
for(auto s1 : not_possible)
for(auto s2: s1.second)
{
if(id_composante.find(s1.first) == id_composante.end())
{
id_composante[s1.first] = id;
id++;
}
if(id_composante.find(s2.first) == id_composante.end())
{
id_composante[s2.first] = id;
id++;
}
}
map<int,vector<int>> composante;
for(auto a : id_composante)
composante[a.second].push_back(a.first);
for(auto c : composante)
{
OUTDEBUG(cerr << "C" << c.first << ", "<< connectivity_check.find(c.second[0])->getValue() << ": {");
unsigned int k = 0;
for(auto b: c.second)
{
OUTDEBUG(cerr << b << ((k == c.second.size()-1) ? "" : ", "));
k ++;
}
OUTDEBUG(cerr << "}" << endl);
}
OUTDEBUG(cerr << "Non equalities : " << endl);
for(auto s1 : not_possible)
for(auto s2: s1.second)
OUTDEBUG(cerr << s1.first << " != " << s2.first << " " << connectivity_check.find(s1.first)->getValue() << " != " << connectivity_check.find(s2.first)->getValue() << endl);
for(int i = 0 ; i < id ; i++)
{
for(int j = i+1 ; j < id ; j++)
{
OUTDEBUG(cerr << "Trying to merge C" << i << " and " << "C" << j << endl);
int r1 = connectivity_check.find(composante[i][0])->getValue();
int r2 = connectivity_check.find(composante[j][0])->getValue();
bool possible = true;
for(auto s1 : not_possible)
for(auto s2: s1.second)
if((((int)connectivity_check.find(s1.first)->getValue() == r1) && ((int)connectivity_check.find(s2.first)->getValue() == r2)) ||
(((int)connectivity_check.find(s1.first)->getValue() == r2) && ((int)connectivity_check.find(s2.first)->getValue() == r1)))
possible = false;
if(possible)
{
OUTDEBUG(cerr << "\tRepresented by " << r1 << " and " << r2 << endl);
OUTDEBUG(cerr << "\tMerging possible !" << endl);
connectivity_check.make_union(r1, r2);
edge[r1][r2] = -1;
edge[r2][r1] = -1;
get_solution();
return;
}
}
}
for(auto c : composante)
{
if(settings_s.smte_s)
cout << "C(" << connectivity_check.find(c.second[0])->getValue() << "): {";
else
cout << "C(" << solver->terms_mapping[connectivity_check.find(c.second[0])->getValue()]->to_str() << "): {";
unsigned int k = 0;
for(auto b: c.second)
{
cout << ((settings_s.smte_s) ? to_string(b) : solver->terms_mapping[b]->to_str()) << ((k == c.second.size()-1) ? "" : ", ");
k ++;
}
cout << "}" << endl;
}
}
pair<clause,int> SMTSolver_eq::diagnose_conflict(int conflict_dec_index)
{
assert(settings_s.smte_s);
if(settings_s.disable_smt_cl_s)
{
int bt_level = solver->curr_level;
OUTDEBUG(fprintf(stderr, "\tShould backtrack until level %d (last bet) inclusively.\n", bt_level));
return make_pair(clause(-1), bt_level);
}
decision conflict_dec = solver->decision_stack[conflict_dec_index];
smt_literal_eq* corresponding_lit = (smt_literal_eq*)solver->dpll_to_smt[abs(conflict_dec.dec)];
OUTDEBUG(fprintf(stderr, "\t[SMT]Diagnosing conflict because of %d (%s)\n", conflict_dec.dec, corresponding_lit->to_str().c_str()));
int s1 = min(corresponding_lit->left, corresponding_lit->right);
int s2 = max(corresponding_lit->left, corresponding_lit->right);
OUTDEBUG(fprintf(stderr, "\t[SMT]Path from %d to %d: \n", s1, s2));
map<int,int> succ;
dfs_enumerate_paths(s1, s2, succ);
int curr = s1;
clause c(solver->formula.size());
int bt_level = 0;
int uip_like = solver->decision_stack.size()-1;
while(curr != s2)
{
assert(edge[curr][succ[curr]] != conflict_dec_index);
if(edge[curr][succ[curr]] != uip_like)
bt_level = max(bt_level, solver->decision_stack[edge[curr][succ[curr]]].level);
if(solver->decision_stack[edge[curr][succ[curr]]].level != -1)
{
c.literal.push_back(-solver->decision_stack[edge[curr][succ[curr]]].dec);
c.assoc_lit[-solver->decision_stack[edge[curr][succ[curr]]].dec] = true;
}
OUTDEBUG(fprintf(stderr, "\t\t%d %d, dec: %d lvl: %d\n", curr, succ[curr], solver->decision_stack[edge[curr][succ[curr]]].dec, solver->decision_stack[edge[curr][succ[curr]]].level));
curr = succ[curr];
}
OUTDEBUG(fprintf(stderr, "\n"));
if(solver->decision_stack[conflict_dec_index].level != -1)
{
c.literal.push_back(-solver->decision_stack[conflict_dec_index].dec);
c.assoc_lit[-solver->decision_stack[conflict_dec_index].dec] = true;
}
if(conflict_dec_index != uip_like)
bt_level = max(bt_level, solver->decision_stack[conflict_dec_index].level);
if(c.literal.size() != 1 && settings_s.wl_s)
{
c.triggers.insert(-solver->decision_stack[uip_like].dec);
for(int i = uip_like-1 ; i >= 0 ; i--)
if(c.assoc_lit.find(-solver->decision_stack[i].dec) != c.assoc_lit.end())
{
c.triggers.insert(-solver->decision_stack[i].dec);
break;
}
}
OUTDEBUG(fprintf(stderr, "\t[SMT]Learning %s\n", c.to_str().c_str()));
OUTDEBUG(fprintf(stderr, "\t[SMT]Backtracking to %d\n", bt_level));
return make_pair(c,bt_level);
}
/* literal violated */
int SMTSolver_eq::apply_last_decision()
{
assert(settings_s.smte_s || settings_s.smtc_s);
int last_dec_index = solver->decision_stack.size()-1;
decision last_decision = solver->decision_stack.back();
if(solver->dpll_to_smt.find(abs(last_decision.dec)) == solver->dpll_to_smt.end())
return -1;
smt_literal_eq* corresponding_lit = (smt_literal_eq*)solver->dpll_to_smt[abs(last_decision.dec)];
OUTDEBUG(fprintf(stderr, "\t[SMT]Handling SMT literal %s\n", corresponding_lit->to_str().c_str()));
int s1 = min(corresponding_lit->left, corresponding_lit->right);
int s2 = max(corresponding_lit->left, corresponding_lit->right);
/*
Cases:
3 = 4 --> add edge ponderated with decision level
3 != 4 --> stock inequality, check for conflict
-(3 = 4) --> stock inequality, check for conflict
-(3 != 4) -->add edge ponderated with decision level
*/
bool add_edge = ((last_decision.dec > 0) && corresponding_lit->equal) || ((last_decision.dec < 0) && !corresponding_lit->equal);
if(connectivity_check.find(s1) == nullptr)
connectivity_check.add(s1);
if(connectivity_check.find(s2) == nullptr)
connectivity_check.add(s2);
if(add_edge)
{
/* Si il existe deja un chemin on s'en fiche*/
if(connectivity_check.find(s1) != connectivity_check.find(s2))
{
edge[s1][s2] = last_dec_index;
edge[s2][s1] = last_dec_index;
OUTDEBUG(fprintf(stderr, "\t[SMT]Adding edge %d-%d, index in stack: %d, pond: %d, lit: %d.\n", corresponding_lit->left, corresponding_lit->right, edge[s1][s2],
solver->decision_stack[edge[s1][s2]].level, solver->decision_stack[edge[s1][s2]].dec));
if(settings_s.smte_s)
connectivity_check.make_union(s1,s2);
else if(settings_s.smtc_s)
merge(s1,s2);
for(auto s1p : not_possible)
for(auto s2p : s1p.second)
{
if(connectivity_check.find(s1p.first) != nullptr && connectivity_check.find(s1p.first) == connectivity_check.find(s2p.first))
{
OUTDEBUG(fprintf(stderr, "\t[SMT]Clash, decision %d (%s) violated, returning %d!\n", solver->decision_stack[s2p.second].dec, solver->dpll_to_smt[abs(solver->decision_stack[s2p.second].dec)]->to_str().c_str(),s2p.second));
return s2p.second;
}
}
}
return -1;
}
not_possible[s1][s2] = last_dec_index;
OUTDEBUG(fprintf(stderr, "\t[SMT]Remembering that %d and %d shouldn't be connected.\n", s1, s2));
if(connectivity_check.find(s1) != nullptr && connectivity_check.find(s1) == connectivity_check.find(s2))
{
OUTDEBUG(fprintf(stderr, "\t[SMT]Clash, decision %d (%s) violated, returning %d!\n", solver->decision_stack[last_dec_index].dec, solver->dpll_to_smt[abs(solver->decision_stack[last_dec_index].dec)]->to_str().c_str(),last_dec_index));
return last_dec_index;
}
return -1;
}
VmMap::VmMap()
{
OUTDEBUG("[ VmMap ] Constructor ");
_init();
}