bool Equation::trivialSolution( ) const
{
Word image;
Word::const_iterator w_it = theEquation.begin( );
for( ; w_it!=theEquation.end( ) ; ++w_it )
if( isGenerator(*w_it) )
image.push_back( *w_it );
return image.length()==0;
}
Func* Func::clone() const {
Func* f = new (allocFuncMem(
m_name,
m_numParams,
isClosureBody() || isGeneratorFromClosure()
)) Func(*this);
f->initPrologues(m_numParams, isGenerator());
f->m_funcId = InvalidFuncId;
return f;
}
fast_Ring<TNum,kdefs>::fast_Ring( unsigned short _char,
unsigned short _epsPrec, short _generator) : characteristic(_char),
epsilon(_epsPrec),
generator( Convert(_generator) )
{
assert( TNum::wellDefined(characteristic) );
assert( epsilon <= 1 );
assert( isGenerator(generator));
init();
assert( wellDefined() );
}
std::string func_flag_list(const FuncInfo& finfo) {
auto const func = finfo.func;
std::vector<std::string> flags;
if (func->isGenerator()) flags.push_back("isGenerator");
if (func->isAsync()) flags.push_back("isAsync");
if (func->isClosureBody()) flags.push_back("isClosureBody");
if (func->isPairGenerator()) flags.push_back("isPairGenerator");
std::string strflags = folly::join(" ", flags);
if (!strflags.empty()) return " " + strflags + " ";
return " ";
}
std::string func_flag_list(const FuncInfo& finfo) {
auto const func = finfo.func;
std::vector<std::string> flags;
if (auto name = func->getGeneratorBodyName()) {
flags.push_back(
folly::format("hasGeneratorBody(\"{}\")", name->toCppString()).str()
);
}
if (func->isGenerator()) flags.push_back("isGenerator");
if (func->isAsync()) flags.push_back("isAsync");
if (func->isGeneratorFromClosure()) flags.push_back("isGeneratorFromClosure");
if (func->isClosureBody()) flags.push_back("isClosureBody");
if (func->isPairGenerator()) flags.push_back("isPairGenerator");
std::string strflags = folly::join(" ", flags);
if (!strflags.empty()) return " " + strflags + " ";
return " ";
}
void dhGenPubKey(dhpvk_t *pvk, dhpbk_t *pbk) {
// Integer used for random numbers
if (!seed_initialized)
rnInit();
do {
mpz_urandomb(pbk->p, seed, DH_KEY_SIZE);
} while (!mpz_probab_prime_p(pbk->p, NB_TURN));
mpz_set(pvk->p, pbk->p);
mpz_set_ui(pbk->g, 2);
// Search alpha so that alpha is a generator
while(!isGenerator(pbk->p, pbk->g))
mpz_add_ui(pbk->g, pbk->g, 1);
mpz_set(pvk->g, pbk->g);
mpz_urandomm(pvk->a, seed, pvk->p);
mpz_powm(pbk->pow, pbk->g, pvk->a, pbk->p);
}
void egKeyGen(egpvk_t *pvk, egpbk_t *pbk) {
// Useful for random generation
if (!seed_initialized)
rnInit();
// Temporary variables
mpz_t tmp;
mpz_init(tmp);
// p definition
do {
mpz_urandomb(pvk->p, seed, EG_KEY_SIZE);
} while (!mpz_probab_prime_p(pvk->p, NB_TURN));
mpz_set(pbk->p, pvk->p);
mpz_set_ui(pbk->alpha, 2);
// Search alpha so that alpha is a generator
while(!isGenerator(pbk->p, pbk->alpha))
mpz_add_ui(pbk->alpha, pbk->alpha, 1);
// Compute private key
mpz_urandomb(pvk->a, seed, EG_KEY_SIZE);
// Compute last part of public key
mpz_powm(pbk->beta, pbk->alpha, pvk->a, pvk->p);
// Compute k
mpz_set_ui(tmp, NB_CHAR);
pvk->k = 0;
while (mpz_cmp(tmp, pbk->p) < 0) {
mpz_mul_ui(tmp, tmp, NB_CHAR);
pvk->k ++;
}
pbk->k = pvk->k;
mpz_clear(tmp);
}
void tearDownFrame(ActRec*& fp, Stack& stack, PC& pc, Offset& faultOffset) {
auto const func = fp->m_func;
auto const curOp = *reinterpret_cast<const Op*>(pc);
auto const unwindingGeneratorFrame = func->isGenerator();
auto const unwindingReturningFrame = curOp == OpRetC || curOp == OpRetV;
auto const prevFp = fp->arGetSfp();
auto const soff = fp->m_soff;
FTRACE(1, "tearDownFrame: {} ({})\n fp {} prevFp {}\n",
func->fullName()->data(),
func->unit()->filepath()->data(),
implicit_cast<void*>(fp),
implicit_cast<void*>(prevFp));
// When throwing from a constructor, we normally want to avoid running the
// destructor on an object that hasn't been fully constructed yet. But if
// we're unwinding through the constructor's RetC, the constructor has
// logically finished and we're unwinding for some internal reason (timeout
// or user profiler, most likely). More importantly, fp->m_this may have
// already been destructed and/or overwritten due to sharing space with
// fp->m_r.
if (!unwindingReturningFrame && fp->isFromFPushCtor() && fp->hasThis()) {
fp->getThis()->setNoDestruct();
}
// A generator's locals don't live on this stack.
if (LIKELY(!unwindingGeneratorFrame)) {
/*
* If we're unwinding through a frame that's returning, it's only
* possible that its locals have already been decref'd.
*
* Here's why:
*
* - If a destructor for any of these things throws a php
* exception, it's swallowed at the dtor boundary and we keep
* running php.
*
* - If the destructor for any of these things throws a fatal,
* it's swallowed, and we set surprise flags to throw a fatal
* from now on.
*
* - If the second case happened and we have to run another
* destructor, its enter hook will throw, but it will be
* swallowed again.
*
* - Finally, the exit hook for the returning function can
* throw, but this happens last so everything is destructed.
*
*/
if (!unwindingReturningFrame) {
try {
// Note that we must convert locals and the $this to
// uninit/zero during unwind. This is because a backtrace
// from another destructing object during this unwind may try
// to read them.
frame_free_locals_unwind(fp, func->numLocals());
} catch (...) {}
}
stack.ndiscard(func->numSlotsInFrame());
stack.discardAR();
} else {
// The generator's locals will be cleaned up when the Continuation
// object is destroyed. But we are leaving the generator function
// now, so signal that to anyone who cares.
try {
EventHook::FunctionExit(fp);
} catch (...) {} // As above, don't let new exceptions out of unwind.
}
/*
* At the final ActRec in this nesting level. We don't need to set
* pc and fp since we're about to re-throw the exception. And we
* don't want to dereference prefFp since we just popped it.
*/
if (prevFp == fp) return;
assert(stack.isValidAddress(reinterpret_cast<uintptr_t>(prevFp)) ||
prevFp->m_func->isGenerator());
auto const prevOff = soff + prevFp->m_func->base();
pc = prevFp->m_func->unit()->at(prevOff);
fp = prevFp;
faultOffset = prevOff;
}
void tearDownFrame(ActRec*& fp, Stack& stack, PC& pc, Offset& faultOffset) {
auto const func = fp->m_func;
auto const curOp = *reinterpret_cast<const Op*>(pc);
auto const unwindingGeneratorFrame = func->isGenerator();
auto const unwindingReturningFrame = curOp == OpRetC || curOp == OpRetV;
auto const prevFp = fp->arGetSfp();
FTRACE(1, "tearDownFrame: {} ({})\n fp {} prevFp {}\n",
func->fullName()->data(),
func->unit()->filepath()->data(),
implicit_cast<void*>(fp),
implicit_cast<void*>(prevFp));
if (fp->isFromFPushCtor() && fp->hasThis()) {
fp->getThis()->setNoDestruct();
}
// A generator's locals don't live on this stack.
if (LIKELY(!unwindingGeneratorFrame)) {
/*
* If we're unwinding through a frame that's returning, it's only
* possible that its locals have already been decref'd.
*
* Here's why:
*
* - If a destructor for any of these things throws a php
* exception, it's swallowed at the dtor boundary and we keep
* running php.
*
* - If the destructor for any of these things throws a fatal,
* it's swallowed, and we set surprise flags to throw a fatal
* from now on.
*
* - If the second case happened and we have to run another
* destructor, its enter hook will throw, but it will be
* swallowed again.
*
* - Finally, the exit hook for the returning function can
* throw, but this happens last so everything is destructed.
*
*/
if (!unwindingReturningFrame) {
try {
// Note that we must convert locals and the $this to
// uninit/zero during unwind. This is because a backtrace
// from another destructing object during this unwind may try
// to read them.
frame_free_locals_unwind(fp, func->numLocals());
} catch (...) {}
}
stack.ndiscard(func->numSlotsInFrame());
stack.discardAR();
}
assert(stack.isValidAddress(reinterpret_cast<uintptr_t>(prevFp)) ||
prevFp->m_func->isGenerator());
auto const prevOff = fp->m_soff + prevFp->m_func->base();
pc = prevFp->m_func->unit()->at(prevOff);
fp = prevFp;
faultOffset = prevOff;
}
