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785b07cc42245cf3d86425b19a664278c20eb1be
hhvm/hphp/runtime/vm/func.cpp
T
mwilliams 785b07cc42 Fix some hhbc verifier bugs 
With these changes, we can run

  HHVM_ALWAYS_VERIFY=1 HHVM_VERIFY_VERBOSE=1 hhvm

without crashing.
2013-06-03 10:54:38 -07:00

1155 linhas
36 KiB
C++
Original Anotar Histórico

/*
+----------------------------------------------------------------------+
| HipHop for PHP |
+----------------------------------------------------------------------+
| Copyright (c) 2010- Facebook, Inc. (http://www.facebook.com) |
+----------------------------------------------------------------------+
| This source file is subject to version 3.01 of the PHP license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| http://www.php.net/license/3_01.txt |
| If you did not receive a copy of the PHP license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| license@php.net so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
*/
#include "hphp/runtime/vm/func.h"
#include <iostream>
#include <boost/scoped_ptr.hpp>
#include "hphp/runtime/base/base_includes.h"
#include "hphp/util/util.h"
#include "hphp/util/trace.h"
#include "hphp/util/debug.h"
#include "hphp/runtime/base/strings.h"
#include "hphp/runtime/vm/core_types.h"
#include "hphp/runtime/vm/runtime.h"
#include "hphp/runtime/vm/repo.h"
#include "hphp/runtime/vm/translator/targetcache.h"
#include "hphp/runtime/eval/runtime/file_repository.h"
#include "hphp/runtime/vm/translator/translator-x64.h"
#include "hphp/runtime/vm/blob_helper.h"
#include "hphp/runtime/vm/func_inline.h"
#include "hphp/system/lib/systemlib.h"
namespace HPHP {
static const Trace::Module TRACEMOD = Trace::bcinterp;
const StringData* Func::s___call = StringData::GetStaticString("__call");
const StringData* Func::s___callStatic =
StringData::GetStaticString("__callStatic");
//=============================================================================
// Func.
static void decl_incompat(const PreClass* implementor,
const Func* imeth) {
const char* name = imeth->name()->data();
raise_error("Declaration of %s::%s() must be compatible with "
"that of %s::%s()", implementor->name()->data(), name,
imeth->cls()->preClass()->name()->data(), name);
}
// Check compatibility vs interface and abstract declarations
void Func::parametersCompat(const PreClass* preClass, const Func* imeth) const {
const Func::ParamInfoVec& params = this->params();
const Func::ParamInfoVec& iparams = imeth->params();
// Verify that meth has at least as many parameters as imeth.
if ((params.size() < iparams.size())) {
decl_incompat(preClass, imeth);
}
// Verify that the typehints for meth's parameters are compatible with
// imeth's corresponding parameter typehints.
unsigned firstOptional = 0;
for (unsigned i = 0; i < iparams.size(); ++i) {
if (!params[i].typeConstraint().compat(iparams[i].typeConstraint())) {
decl_incompat(preClass, imeth);
}
if (!iparams[i].hasDefaultValue()) {
// The leftmost of imeth's contiguous trailing optional parameters
// must start somewhere to the right of this parameter.
firstOptional = i + 1;
}
}
// Verify that meth provides defaults, starting with the parameter that
// corresponds to the leftmost of imeth's contiguous trailing optional
// parameters.
for (unsigned i = firstOptional; i < params.size(); ++i) {
if (!params[i].hasDefaultValue()) {
decl_incompat(preClass, imeth);
}
}
}
static Func::FuncId s_nextFuncId = 0;
void Func::setFuncId(FuncId id) {
assert(m_funcId == InvalidId);
assert(id != InvalidId);
m_funcId = id;
}
void Func::setNewFuncId() {
assert(m_funcId == InvalidId);
m_funcId = __sync_fetch_and_add(&s_nextFuncId, 1);
}
void Func::setFullName() {
assert(m_name->isStatic());
if (m_cls) {
m_fullName = StringData::GetStaticString(
std::string(m_cls->name()->data()) + "::" + m_name->data());
} else {
m_fullName = m_name;
m_namedEntity = Unit::GetNamedEntity(m_name);
}
if (RuntimeOption::DynamicInvokeFunctions.size()) {
if (RuntimeOption::DynamicInvokeFunctions.find(m_fullName->data()) !=
RuntimeOption::DynamicInvokeFunctions.end()) {
m_attrs = Attr(m_attrs | AttrDynamicInvoke);
}
}
}
void Func::initPrologues(int numParams, bool isGenerator) {
m_funcBody = (TCA)HPHP::Transl::funcBodyHelperThunk;
int maxNumPrologues = Func::getMaxNumPrologues(numParams);
int numPrologues =
maxNumPrologues > kNumFixedPrologues ? maxNumPrologues
: kNumFixedPrologues;
TRACE(2, "initPrologues func %p %d\n", this, numPrologues);
for (int i = 0; i < numPrologues; i++) {
m_prologueTable[i] = (TCA)HPHP::Transl::fcallHelperThunk;
}
}
void Func::init(int numParams, bool isGenerator) {
// For methods, we defer setting the full name until m_cls is initialized
m_maybeIntercepted = -1;
if (!preClass()) {
setNewFuncId();
setFullName();
} else {
m_fullName = 0;
}
if (isSpecial(m_name)) {
/*
* i) We dont want these compiler generated functions to
* appear in backtraces.
*
* ii) 86sinit and 86pinit construct NameValueTableWrappers
* on the stack. So we MUST NOT allow those to leak into
* the backtrace (since the backtrace will outlive the
* variables).
*/
m_attrs = m_attrs | AttrNoInjection;
}
#ifdef DEBUG
m_magic = kMagic;
#endif
assert(m_name);
initPrologues(numParams, isGenerator);
}
void* Func::allocFuncMem(
const StringData* name, int numParams, bool needsNextClonedClosure) {
int maxNumPrologues = Func::getMaxNumPrologues(numParams);
int numExtraPrologues =
maxNumPrologues > kNumFixedPrologues ?
maxNumPrologues - kNumFixedPrologues :
0;
size_t funcSize = sizeof(Func) + numExtraPrologues * sizeof(unsigned char*);
if (needsNextClonedClosure) {
funcSize += sizeof(Func*);
}
void* mem = Util::low_malloc(funcSize);
if (needsNextClonedClosure) {
// make room for nextClonedClosure to work
Func** startOfFunc = (Func**) mem;
*startOfFunc = nullptr;
return startOfFunc + 1;
}
return mem;
}
Func::Func(Unit& unit, Id id, int line1, int line2,
Offset base, Offset past, const StringData* name,
Attr attrs, bool top, const StringData* docComment, int numParams,
bool isGenerator)
: m_unit(&unit)
, m_cls(nullptr)
, m_baseCls(nullptr)
, m_name(name)
, m_namedEntity(nullptr)
, m_refBitVec(nullptr)
, m_cachedOffset(0)
, m_maxStackCells(0)
, m_numParams(0)
, m_attrs(attrs)
, m_funcId(InvalidId)
, m_hasPrivateAncestor(false)
{
m_shared = new SharedData(nullptr, id, base, past, line1, line2,
top, docComment);
init(numParams, isGenerator);
}
// Class method
Func::Func(Unit& unit, PreClass* preClass, int line1, int line2, Offset base,
Offset past, const StringData* name, Attr attrs,
bool top, const StringData* docComment, int numParams,
bool isGenerator)
: m_unit(&unit)
, m_cls(nullptr)
, m_baseCls(nullptr)
, m_name(name)
, m_namedEntity(nullptr)
, m_refBitVec(nullptr)
, m_cachedOffset(0)
, m_maxStackCells(0)
, m_numParams(0)
, m_attrs(attrs)
, m_funcId(InvalidId)
, m_hasPrivateAncestor(false)
{
Id id = -1;
m_shared = new SharedData(preClass, id, base, past, line1, line2,
top, docComment);
init(numParams, isGenerator);
}
Func::~Func() {
if (m_fullName != nullptr && m_maybeIntercepted != -1) {
unregister_intercept_flag(fullNameRef(), &m_maybeIntercepted);
}
#ifdef DEBUG
validate();
m_magic = ~m_magic;
#endif
}
void Func::destroy(Func* func) {
void* mem = func;
if (func->isClosureBody() || func->isGeneratorFromClosure()) {
Func** startOfFunc = (Func**) mem;
mem = startOfFunc - 1; // move back by a pointer
}
func->~Func();
Util::low_free(mem);
}
Func* Func::clone() const {
Func* f = new (allocFuncMem(
m_name,
m_numParams,
isClosureBody() || isGeneratorFromClosure()
)) Func(*this);
f->initPrologues(m_numParams, isGenerator());
f->m_funcId = InvalidId;
return f;
}
const Func* Func::cloneAndSetClass(Class* cls) const {
if (const Func* ret = findCachedClone(cls)) {
return ret;
}
static Mutex s_clonedFuncListMutex;
Lock l(s_clonedFuncListMutex);
// Check again now that I'm the writer
if (const Func* ret = findCachedClone(cls)) {
return ret;
}
Func* clonedFunc = clone();
clonedFunc->setNewFuncId();
clonedFunc->setCls(cls);
// Save it so we don't have to keep cloning it and retranslating
Func** nextFunc = &this->nextClonedClosure();
while (*nextFunc) {
nextFunc = &nextFunc[0]->nextClonedClosure();
}
*nextFunc = clonedFunc;
return clonedFunc;
}
const Func* Func::findCachedClone(Class* cls) const {
const Func* nextFunc = this;
while (nextFunc) {
if (nextFunc->cls() == cls) {
return nextFunc;
}
nextFunc = nextFunc->nextClonedClosure();
}
return nullptr;
}
void Func::rename(const StringData* name) {
m_name = name;
setFullName();
// load the renamed function
Unit::loadFunc(this);
}
bool Func::checkIterScope(Offset o, Id iterId, bool& itRef) const {
const EHEntVec& ehtab = shared()->m_ehtab;
assert(o >= base() && o < past());
for (unsigned i = 0, n = ehtab.size(); i < n; i++) {
const EHEnt* eh = &ehtab[i];
if (eh->m_ehtype == EHEnt::EHType_Fault &&
eh->m_base <= o && o < eh->m_past &&
eh->m_iterId == iterId) {
itRef = eh->m_itRef;
return true;
}
}
return false;
}
const EHEnt* Func::findEH(Offset o) const {
assert(o >= base() && o < past());
const EHEnt* eh = nullptr;
unsigned int i;
const EHEntVec& ehtab = shared()->m_ehtab;
for (i = 0; i < ehtab.size(); i++) {
if (ehtab[i].m_base <= o && o < ehtab[i].m_past) {
eh = &ehtab[i];
}
}
return eh;
}
const FPIEnt* Func::findFPI(Offset o) const {
assert(o >= base() && o < past());
const FPIEnt* fe = nullptr;
unsigned int i;
const FPIEntVec& fpitab = shared()->m_fpitab;
for (i = 0; i < fpitab.size(); i++) {
/*
* We consider the "FCall" instruction part of the FPI region, but
* the corresponding push is not considered part of it. (This
* means all offsets in the FPI region will have the partial
* ActRec on the stack.)
*/
if (fpitab[i].m_fpushOff < o && o <= fpitab[i].m_fcallOff) {
fe = &fpitab[i];
}
}
return fe;
}
const FPIEnt* Func::findPrecedingFPI(Offset o) const {
assert(o >= base() && o < past());
const FPIEntVec& fpitab = shared()->m_fpitab;
assert(fpitab.size());
const FPIEnt* fe = &fpitab[0];
unsigned int i;
for (i = 1; i < fpitab.size(); i++) {
const FPIEnt* cur = &fpitab[i];
if (o > cur->m_fcallOff &&
fe->m_fcallOff < cur->m_fcallOff) {
fe = cur;
}
}
assert(fe);
return fe;
}
bool Func::isClonedClosure() const {
if (!isClosureBody()) return false;
if (!cls()) return true;
return cls()->lookupMethod(name()) != this;
}
bool Func::isNameBindingImmutable(const Unit* fromUnit) const {
if (RuntimeOption::EvalJitEnableRenameFunction ||
m_attrs & AttrDynamicInvoke) {
return false;
}
if (isBuiltin()) {
return true;
}
if (isUnique() && RuntimeOption::RepoAuthoritative) {
return true;
}
// Defined at top level, in the same unit as the caller. This precludes
// conditionally defined functions and cross-module calls -- both phenomena
// can change name->Func mappings during the lifetime of a TC.
return top() && (fromUnit == m_unit);
}
bool Func::byRef(int32_t arg) const {
// Super special case. A handful of builtins are varargs functions where the
// (not formally declared) varargs are pass-by-reference. psychedelic-kitten
if (arg >= m_numParams && info() &&
(info()->attribute & (ClassInfo::RefVariableArguments |
ClassInfo::MixedVariableArguments))) {
return true;
}
int qword = arg / kBitsPerQword;
int bit = arg % kBitsPerQword;
bool retval = arg < m_numParams && (m_refBitVec[qword] & (1ull << bit)) != 0;
return retval;
}
bool Func::mustBeRef(int32_t arg) const {
// return true if the argument is required to be a reference
// (and thus should be an lvalue)
if (arg >= m_numParams && info() &&
((info()->attribute & (ClassInfo::RefVariableArguments |
ClassInfo::MixedVariableArguments)) ==
ClassInfo::RefVariableArguments)) {
return true;
}
int qword = arg / kBitsPerQword;
int bit = arg % kBitsPerQword;
bool retval = arg < m_numParams && (m_refBitVec[qword] & (1ull << bit)) != 0;
return retval;
}
void Func::appendParam(bool ref, const Func::ParamInfo& info,
std::vector<ParamInfo>& pBuilder) {
int qword = m_numParams / kBitsPerQword;
int bit = m_numParams % kBitsPerQword;
// Grow args, if necessary.
if ((m_numParams++ & (kBitsPerQword - 1)) == 0) {
assert(shared()->m_refBitVec == m_refBitVec);
shared()->m_refBitVec = m_refBitVec = (uint64_t*)
realloc(shared()->m_refBitVec,
// E.g., 65th m_numParams -> 2 qwords
(1 + m_numParams / kBitsPerQword) * sizeof(uint64_t));
// The new word is either zerod or set to 1, depending on whether
// we are one of the special builtins that takes variadic
// reference arguments. This is for use in the translator.
shared()->m_refBitVec[m_numParams / kBitsPerQword] =
(m_attrs & AttrVariadicByRef) ? -1ull : 0;
}
assert(!!(shared()->m_refBitVec[qword] & (uint64_t(1) << bit)) ==
!!(m_attrs & AttrVariadicByRef));
shared()->m_refBitVec[qword] &= ~(1ull << bit);
shared()->m_refBitVec[qword] |= uint64_t(ref) << bit;
pBuilder.push_back(info);
}
Id Func::lookupVarId(const StringData* name) const {
assert(name != nullptr);
return shared()->m_localNames.findIndex(name);
}
void Func::prettyPrint(std::ostream& out) const {
if (isPseudoMain()) {
out << "Pseudo-main";
} else if (preClass() != nullptr) {
out << "Method ";
if (m_attrs & AttrStatic) { out << "static "; }
if (m_attrs & AttrPublic) { out << "public "; }
if (m_attrs & AttrProtected) { out << "protected "; }
if (m_attrs & AttrPrivate) { out << "private "; }
if (m_attrs & AttrAbstract) { out << "abstract "; }
if (m_attrs & AttrFinal) { out << "final "; }
if (m_attrs & AttrPhpLeafFn) { out << "(leaf) "; }
if (cls() != nullptr) {
out << fullName()->data();
} else {
out << preClass()->name()->data() << "::" << m_name->data();
}
} else {
out << "Function " << m_name->data();
}
if (m_attrs & AttrHot) out << " (hot)";
out << " at " << base();
if (shared()->m_id != -1) {
out << " (ID " << shared()->m_id << ")";
}
out << std::endl;
const ParamInfoVec& params = shared()->m_params;
for (uint i = 0; i < params.size(); ++i) {
if (params[i].funcletOff() != InvalidAbsoluteOffset) {
out << " DV for parameter " << i << " at " << params[i].funcletOff();
if (params[i].phpCode()) {
out << " = " << params[i].phpCode()->data() << std::endl;
}
}
}
const EHEntVec& ehtab = shared()->m_ehtab;
for (EHEntVec::const_iterator it = ehtab.begin(); it != ehtab.end(); ++it) {
bool catcher = it->m_ehtype == EHEnt::EHType_Catch;
out << " EH " << (catcher ? "Catch" : "Fault") << " for " <<
it->m_base << ":" << it->m_past;
if (it->m_parentIndex != -1) {
out << " outer EH " << it->m_parentIndex;
}
if (it->m_iterId != -1) {
out << " iterId " << it->m_iterId;
out << " itRef " << (it->m_itRef ? "true" : "false");
}
if (catcher) {
out << std::endl;
for (EHEnt::CatchVec::const_iterator it2 = it->m_catches.begin();
it2 != it->m_catches.end(); ++it2) {
out << " Handle " << m_unit->lookupLitstrId(it2->first)->data()
<< " at " << it2->second;
}
} else {
out << " to " << it->m_fault;
}
if (it->m_parentIndex != -1) {
out << " parentIndex " << it->m_parentIndex;
}
out << std::endl;
}
}
HphpArray* Func::getStaticLocals() const {
return g_vmContext->getFuncStaticCtx(this);
}
void Func::getFuncInfo(ClassInfo::MethodInfo* mi) const {
assert(mi);
if (info() != nullptr) {
// Very large operator=() invocation.
*mi = *info();
// Deep copy the vectors of mi-owned pointers.
cloneMembers(mi->parameters);
cloneMembers(mi->staticVariables);
} else {
// hphpc sets the ClassInfo::VariableArguments attribute if the method
// contains a call to func_get_arg, func_get_args, or func_num_args. We
// don't do this in the VM currently and hopefully we never will need to.
int attr = 0;
if (m_attrs & AttrReference) attr |= ClassInfo::IsReference;
if (m_attrs & AttrAbstract) attr |= ClassInfo::IsAbstract;
if (m_attrs & AttrFinal) attr |= ClassInfo::IsFinal;
if (m_attrs & AttrProtected) attr |= ClassInfo::IsProtected;
if (m_attrs & AttrPrivate) attr |= ClassInfo::IsPrivate;
if (m_attrs & AttrStatic) attr |= ClassInfo::IsStatic;
if (!(attr & ClassInfo::IsProtected || attr & ClassInfo::IsPrivate)) {
attr |= ClassInfo::IsPublic;
}
if (preClass() &&
(!strcasecmp(m_name->data(), "__construct") ||
(!(preClass()->attrs() & AttrTrait) &&
!strcasecmp(m_name->data(), preClass()->name()->data()) &&
!preClass()->hasMethod(String("__construct").get())))) {
attr |= ClassInfo::IsConstructor;
}
if (attr == 0) attr = ClassInfo::IsNothing;
mi->attribute = (ClassInfo::Attribute)attr;
mi->name = m_name->data();
mi->file = m_unit->filepath()->data();
mi->line1 = line1();
mi->line2 = line2();
if (docComment() && !docComment()->empty()) {
mi->docComment = docComment()->data();
}
// Get the parameter info
for (unsigned i = 0; i < unsigned(m_numParams); ++i) {
ClassInfo::ParameterInfo* pi = new ClassInfo::ParameterInfo;
attr = 0;
if (byRef(i)) {
attr |= ClassInfo::IsReference;
}
if (attr == 0) {
attr = ClassInfo::IsNothing;
}
const ParamInfoVec& params = shared()->m_params;
const ParamInfo& fpi = params[i];
pi->attribute = (ClassInfo::Attribute)attr;
pi->name = shared()->m_localNames[i]->data();
if (params.size() <= i || !fpi.hasDefaultValue()) {
pi->value = nullptr;
pi->valueText = "";
} else {
if (fpi.hasScalarDefaultValue()) {
// Most of the time the default value is scalar, so we can
// avoid evaling in the common case
pi->value = strdup(f_serialize(
tvAsVariant((TypedValue*)&fpi.defaultValue())).get()->data());
} else {
// Eval PHP code to get default value, and serialize the result. Note
// that access of undefined class constants can cause the eval() to
// fatal. Zend lets such fatals propagate, so don't bother catching
// exceptions here.
CVarRef v = g_vmContext->getEvaledArg(fpi.phpCode());
pi->value = strdup(f_serialize(v).get()->data());
}
// This is a raw char*, but its lifetime should be at least as long
// as the the Func*. At this writing, it's a merged anon string
// owned by ParamInfo.
pi->valueText = fpi.phpCode()->data();
}
pi->type = fpi.typeConstraint().exists() ?
fpi.typeConstraint().typeName()->data() : "";
for (UserAttributeMap::const_iterator it = fpi.userAttributes().begin();
it != fpi.userAttributes().end(); ++it) {
// convert the typedvalue to a cvarref and push into pi.
auto userAttr = new ClassInfo::UserAttributeInfo;
assert(it->first->isStatic());
userAttr->name = const_cast<StringData*>(it->first);
userAttr->setStaticValue(tvAsCVarRef(&it->second));
pi->userAttrs.push_back(userAttr);
}
mi->parameters.push_back(pi);
}
// XXX ConstantInfo is abused to store static variable metadata, and
// although ConstantInfo::callbacks provides a mechanism for registering
// callbacks, it does not pass enough information through for the callback
// functions to know the function context whence the callbacks came.
// Furthermore, the callback mechanism isn't employed in a fashion that
// would allow repeated introspection to reflect updated values.
// Supporting introspection of static variable values will require
// different plumbing than currently exists in ConstantInfo.
const SVInfoVec& staticVars = shared()->m_staticVars;
for (SVInfoVec::const_iterator it = staticVars.begin();
it != staticVars.end(); ++it) {
ClassInfo::ConstantInfo* ci = new ClassInfo::ConstantInfo;
ci->name = *(String*)(&(*it).name);
if ((*it).phpCode != nullptr) {
ci->valueLen = (*it).phpCode->size();
ci->valueText = (*it).phpCode->data();
} else {
ci->valueLen = 0;
ci->valueText = "";
}
mi->staticVariables.push_back(ci);
}
}
}
Func::SharedData::SharedData(PreClass* preClass, Id id,
Offset base, Offset past, int line1, int line2,
bool top, const StringData* docComment)
: m_preClass(preClass), m_id(id), m_base(base),
m_numLocals(0), m_numIterators(0),
m_past(past), m_line1(line1), m_line2(line2),
m_info(nullptr), m_refBitVec(nullptr), m_builtinFuncPtr(nullptr),
m_docComment(docComment), m_top(top), m_isClosureBody(false),
m_isGenerator(false), m_isGeneratorFromClosure(false),
m_hasGeneratorAsBody(false), m_originalFilename(nullptr) {
}
Func::SharedData::~SharedData() {
if (m_refBitVec) {
free(m_refBitVec);
}
}
void Func::SharedData::atomicRelease() {
delete this;
}
Func** Func::getCachedAddr() {
assert(!isMethod());
return getCachedFuncAddr(m_cachedOffset);
}
void Func::setCached() {
setCachedFunc(this, isDebuggerAttached());
}
const Func* Func::getGeneratorBody(const StringData* name) const {
if (isNonClosureMethod()) {
return cls()->lookupMethod(name);
} else {
return Unit::lookupFunc(name);
}
}
//=============================================================================
// FuncEmitter.
FuncEmitter::FuncEmitter(UnitEmitter& ue, int sn, Id id, const StringData* n)
: m_ue(ue)
, m_pce(nullptr)
, m_sn(sn)
, m_id(id)
, m_name(n)
, m_numLocals(0)
, m_numUnnamedLocals(0)
, m_activeUnnamedLocals(0)
, m_numIterators(0)
, m_nextFreeIterator(0)
, m_retTypeConstraint(nullptr)
, m_returnType(KindOfInvalid)
, m_top(false)
, m_isClosureBody(false)
, m_isGenerator(false)
, m_isGeneratorFromClosure(false)
, m_hasGeneratorAsBody(false)
, m_containsCalls(false)
, m_info(nullptr)
, m_builtinFuncPtr(nullptr)
, m_originalFilename(nullptr)
{}
FuncEmitter::FuncEmitter(UnitEmitter& ue, int sn, const StringData* n,
PreClassEmitter* pce)
: m_ue(ue)
, m_pce(pce)
, m_sn(sn)
, m_name(n)
, m_numLocals(0)
, m_numUnnamedLocals(0)
, m_activeUnnamedLocals(0)
, m_numIterators(0)
, m_nextFreeIterator(0)
, m_retTypeConstraint(nullptr)
, m_returnType(KindOfInvalid)
, m_top(false)
, m_isClosureBody(false)
, m_isGenerator(false)
, m_isGeneratorFromClosure(false)
, m_hasGeneratorAsBody(false)
, m_containsCalls(false)
, m_info(nullptr)
, m_builtinFuncPtr(nullptr)
, m_originalFilename(nullptr)
{}
FuncEmitter::~FuncEmitter() {
}
void FuncEmitter::init(int line1, int line2, Offset base, Attr attrs, bool top,
const StringData* docComment) {
m_line1 = line1;
m_line2 = line2;
m_base = base;
m_attrs = attrs;
m_top = top;
m_docComment = docComment;
if (!SystemLib::s_inited) {
m_attrs = m_attrs | AttrBuiltin;
if (!pce()) m_attrs = m_attrs | AttrSkipFrame;
}
}
void FuncEmitter::finish(Offset past, bool load) {
m_past = past;
sortEHTab();
sortFPITab(load);
}
EHEnt& FuncEmitter::addEHEnt() {
m_ehtab.push_back(EHEnt());
return m_ehtab.back();
}
FPIEnt& FuncEmitter::addFPIEnt() {
m_fpitab.push_back(FPIEnt());
return m_fpitab.back();
}
Id FuncEmitter::newLocal() {
return m_numLocals++;
}
void FuncEmitter::appendParam(const StringData* name, const ParamInfo& info) {
allocVarId(name);
m_params.push_back(info);
}
void FuncEmitter::allocVarId(const StringData* name) {
assert(name != nullptr);
// Unnamed locals are segregated (they all come after the named locals).
assert(m_numUnnamedLocals == 0);
UNUSED Id id;
if (m_localNames.find(name) == m_localNames.end()) {
id = newLocal();
assert(id == (int)m_localNames.size());
m_localNames.add(name, name);
}
}
Id FuncEmitter::lookupVarId(const StringData* name) const {
assert(this->hasVar(name));
return m_localNames.find(name)->second;
}
bool FuncEmitter::hasVar(const StringData* name) const {
assert(name != nullptr);
return m_localNames.find(name) != m_localNames.end();
}
Id FuncEmitter::allocIterator() {
assert(m_numIterators >= m_nextFreeIterator);
Id id = m_nextFreeIterator++;
if (m_numIterators < m_nextFreeIterator) {
m_numIterators = m_nextFreeIterator;
}
return id;
}
void FuncEmitter::freeIterator(Id id) {
--m_nextFreeIterator;
assert(id == m_nextFreeIterator);
}
void FuncEmitter::setNumIterators(Id numIterators) {
assert(m_numIterators == 0);
m_numIterators = numIterators;
}
Id FuncEmitter::allocUnnamedLocal() {
++m_activeUnnamedLocals;
if (m_activeUnnamedLocals > m_numUnnamedLocals) {
newLocal();
++m_numUnnamedLocals;
}
return m_numLocals - m_numUnnamedLocals + (m_activeUnnamedLocals - 1);
}
void FuncEmitter::freeUnnamedLocal(Id id) {
assert(m_activeUnnamedLocals > 0);
--m_activeUnnamedLocals;
}
void FuncEmitter::setNumLocals(Id numLocals) {
assert(numLocals >= m_numLocals);
m_numLocals = numLocals;
}
void FuncEmitter::addStaticVar(Func::SVInfo svInfo) {
m_staticVars.push_back(svInfo);
}
namespace {
/*
* Ordering on EHEnts where e1 < e2 iff
*
* a) e1 and e2 do not overlap, and e1 comes first
* b) e1 encloses e2
* c) e1 and e2 have the same region, but e1 is a Catch funclet and
* e2 is a Fault funclet.
*/
struct EHEntComp {
bool operator()(const EHEnt& e1, const EHEnt& e2) const {
if (e1.m_base == e2.m_base) {
if (e1.m_past == e2.m_past) {
return e1.m_ehtype == EHEnt::EHType_Catch;
}
return e1.m_past > e2.m_past;
}
return e1.m_base < e2.m_base;
}
};
}
void FuncEmitter::sortEHTab() {
std::sort(m_ehtab.begin(), m_ehtab.end(), EHEntComp());
for (unsigned int i = 0; i < m_ehtab.size(); i++) {
m_ehtab[i].m_parentIndex = -1;
for (int j = i - 1; j >= 0; j--) {
if (m_ehtab[j].m_past >= m_ehtab[i].m_past) {
// parent EHEnt better enclose this one.
assert(m_ehtab[j].m_base <= m_ehtab[i].m_base);
m_ehtab[i].m_parentIndex = j;
break;
}
}
}
}
void FuncEmitter::sortFPITab(bool load) {
// Sort it and fill in parent info
std::sort(m_fpitab.begin(), m_fpitab.end(), FPIEntComp());
for (unsigned int i = 0; i < m_fpitab.size(); i++) {
m_fpitab[i].m_parentIndex = -1;
m_fpitab[i].m_fpiDepth = 1;
for (int j = i - 1; j >= 0; j--) {
if (m_fpitab[j].m_fcallOff > m_fpitab[i].m_fcallOff) {
m_fpitab[i].m_parentIndex = j;
m_fpitab[i].m_fpiDepth = m_fpitab[j].m_fpiDepth + 1;
break;
}
}
if (!load) {
// m_fpOff does not include the space taken up by locals, iterators and
// the AR itself. Fix it here.
m_fpitab[i].m_fpOff += m_numLocals
+ m_numIterators * kNumIterCells
+ (m_fpitab[i].m_fpiDepth) * kNumActRecCells;
}
}
}
void FuncEmitter::addUserAttribute(const StringData* name, TypedValue tv) {
m_userAttributes[name] = tv;
}
void FuncEmitter::commit(RepoTxn& txn) const {
Repo& repo = Repo::get();
FuncRepoProxy& frp = repo.frp();
int repoId = m_ue.repoId();
int64_t usn = m_ue.sn();
frp.insertFunc(repoId)
.insert(*this, txn, usn, m_sn, m_pce ? m_pce->id() : -1, m_name, m_top);
}
Func* FuncEmitter::create(Unit& unit, PreClass* preClass /* = NULL */) const {
Attr attrs = m_attrs;
if (attrs & AttrPersistent &&
((RuntimeOption::EvalJitEnableRenameFunction &&
!isdigit(m_name->data()[0])) ||
(!RuntimeOption::RepoAuthoritative && SystemLib::s_inited))) {
attrs = Attr(attrs & ~AttrPersistent);
}
if (RuntimeOption::EvalJitEnableRenameFunction &&
!m_name->empty() &&
!Func::isSpecial(m_name) &&
!m_isClosureBody &&
!m_isGenerator) {
// intercepted functions need to pass all args through
// to the interceptee
attrs = attrs | AttrMayUseVV;
}
if (!m_containsCalls) attrs = Attr(attrs | AttrPhpLeafFn);
Func* f = (m_pce == nullptr)
? m_ue.newFunc(this, unit, m_id, m_line1, m_line2, m_base,
m_past, m_name, attrs, m_top, m_docComment,
m_params.size(), m_isClosureBody | m_isGeneratorFromClosure,
m_isGenerator)
: m_ue.newFunc(this, unit, preClass, m_line1, m_line2, m_base,
m_past, m_name, attrs, m_top, m_docComment,
m_params.size(), m_isClosureBody | m_isGeneratorFromClosure,
m_isGenerator);
f->shared()->m_info = m_info;
f->shared()->m_returnType = m_returnType;
std::vector<Func::ParamInfo> pBuilder;
for (unsigned i = 0; i < m_params.size(); ++i) {
Func::ParamInfo pi;
pi.setFuncletOff(m_params[i].funcletOff());
pi.setDefaultValue(m_params[i].defaultValue());
pi.setPhpCode(m_params[i].phpCode());
pi.setTypeConstraint(m_params[i].typeConstraint());
pi.setUserAttributes(m_params[i].userAttributes());
pi.setBuiltinType(m_params[i].builtinType());
pi.setUserType(m_params[i].userType());
f->appendParam(m_params[i].ref(), pi, pBuilder);
}
f->shared()->m_params = pBuilder;
f->shared()->m_localNames.create(m_localNames);
f->shared()->m_numLocals = m_numLocals;
f->shared()->m_numIterators = m_numIterators;
f->m_maxStackCells = m_maxStackCells;
assert(m_maxStackCells > 0 && "You probably didn't set m_maxStackCells");
f->shared()->m_staticVars = m_staticVars;
f->shared()->m_ehtab = m_ehtab;
f->shared()->m_fpitab = m_fpitab;
f->shared()->m_isClosureBody = m_isClosureBody;
f->shared()->m_isGenerator = m_isGenerator;
f->shared()->m_isGeneratorFromClosure = m_isGeneratorFromClosure;
f->shared()->m_hasGeneratorAsBody = m_hasGeneratorAsBody;
f->shared()->m_userAttributes = m_userAttributes;
f->shared()->m_builtinFuncPtr = m_builtinFuncPtr;
f->shared()->m_nativeFuncPtr = m_nativeFuncPtr;
f->shared()->m_retTypeConstraint = m_retTypeConstraint;
f->shared()->m_originalFilename = m_originalFilename;
return f;
}
void FuncEmitter::setBuiltinFunc(const ClassInfo::MethodInfo* info,
BuiltinFunction bif, BuiltinFunction nif,
Offset base) {
assert(info);
assert(bif);
m_info = info;
m_builtinFuncPtr = bif;
m_nativeFuncPtr = nif;
m_base = base;
m_top = true;
m_docComment = StringData::GetStaticString(info->docComment);
m_line1 = 0;
m_line2 = 0;
m_attrs = AttrBuiltin | AttrSkipFrame;
// TODO: Task #1137917: See if we can avoid marking most builtins with
// "MayUseVV" and still make things work
m_attrs = m_attrs | AttrMayUseVV;
if (info->attribute & (ClassInfo::RefVariableArguments |
ClassInfo::MixedVariableArguments)) {
m_attrs = m_attrs | AttrVariadicByRef;
}
if (info->attribute & ClassInfo::IsReference) {
m_attrs = m_attrs | AttrReference;
}
if (info->attribute & ClassInfo::NoInjection) {
m_attrs = m_attrs | AttrNoInjection;
}
if (pce()) {
if (info->attribute & ClassInfo::IsStatic) {
m_attrs = m_attrs | AttrStatic;
}
if (info->attribute & ClassInfo::IsFinal) {
m_attrs = m_attrs | AttrFinal;
}
if (info->attribute & ClassInfo::IsAbstract) {
m_attrs = m_attrs | AttrAbstract;
}
if (info->attribute & ClassInfo::IsPrivate) {
m_attrs = m_attrs | AttrPrivate;
} else if (info->attribute & ClassInfo::IsProtected) {
m_attrs = m_attrs | AttrProtected;
} else {
m_attrs = m_attrs | AttrPublic;
}
} else if (info->attribute & ClassInfo::AllowOverride) {
m_attrs = m_attrs | AttrAllowOverride;
}
m_returnType = info->returnType;
for (unsigned i = 0; i < info->parameters.size(); ++i) {
// For builtin only, we use a dummy ParamInfo
FuncEmitter::ParamInfo pi;
pi.setRef((bool)(info->parameters[i]->attribute & ClassInfo::IsReference));
pi.setBuiltinType(info->parameters[i]->argType);
appendParam(StringData::GetStaticString(info->parameters[i]->name), pi);
}
}
template<class SerDe>
void FuncEmitter::serdeMetaData(SerDe& sd) {
// NOTE: name, top, and a few other fields currently serialized
// outside of this.
sd(m_line1)
(m_line2)
(m_base)
(m_past)
(m_attrs)
(m_returnType)
(m_docComment)
(m_numLocals)
(m_numIterators)
(m_maxStackCells)
(m_isClosureBody)
(m_isGenerator)
(m_isGeneratorFromClosure)
(m_hasGeneratorAsBody)
(m_containsCalls)
(m_params)
(m_localNames)
(m_staticVars)
(m_ehtab)
(m_fpitab)
(m_userAttributes)
(m_retTypeConstraint)
(m_originalFilename)
;
}
//=============================================================================
// FuncRepoProxy.
FuncRepoProxy::FuncRepoProxy(Repo& repo)
: RepoProxy(repo)
#define FRP_OP(c, o) \
, m_##o##Local(repo, RepoIdLocal), m_##o##Central(repo, RepoIdCentral)
FRP_OPS
#undef FRP_OP
{
#define FRP_OP(c, o) \
m_##o[RepoIdLocal] = &m_##o##Local; \
m_##o[RepoIdCentral] = &m_##o##Central;
FRP_OPS
#undef FRP_OP
}
FuncRepoProxy::~FuncRepoProxy() {
}
void FuncRepoProxy::createSchema(int repoId, RepoTxn& txn) {
std::stringstream ssCreate;
ssCreate << "CREATE TABLE " << m_repo.table(repoId, "Func")
<< "(unitSn INTEGER, funcSn INTEGER, preClassId INTEGER,"
" name TEXT, top INTEGER,"
" extraData BLOB,"
" PRIMARY KEY (unitSn, funcSn));";
txn.exec(ssCreate.str());
}
void FuncRepoProxy::InsertFuncStmt
::insert(const FuncEmitter& fe,
RepoTxn& txn, int64_t unitSn, int funcSn,
Id preClassId, const StringData* name,
bool top) {
if (!prepared()) {
std::stringstream ssInsert;
ssInsert << "INSERT INTO " << m_repo.table(m_repoId, "Func")
<< " VALUES(@unitSn, @funcSn, @preClassId, @name, "
" @top, @extraData);";
txn.prepare(*this, ssInsert.str());
}
BlobEncoder extraBlob;
RepoTxnQuery query(txn, *this);
query.bindInt64("@unitSn", unitSn);
query.bindInt("@funcSn", funcSn);
query.bindId("@preClassId", preClassId);
query.bindStaticString("@name", name);
query.bindBool("@top", top);
const_cast<FuncEmitter&>(fe).serdeMetaData(extraBlob);
query.bindBlob("@extraData", extraBlob, /* static */ true);
query.exec();
}
void FuncRepoProxy::GetFuncsStmt
::get(UnitEmitter& ue) {
RepoTxn txn(m_repo);
if (!prepared()) {
std::stringstream ssSelect;
ssSelect << "SELECT funcSn,preClassId,name,top,extraData "
"FROM "
<< m_repo.table(m_repoId, "Func")
<< " WHERE unitSn == @unitSn ORDER BY funcSn ASC;";
txn.prepare(*this, ssSelect.str());
}
RepoTxnQuery query(txn, *this);
query.bindInt64("@unitSn", ue.sn());
do {
query.step();
if (query.row()) {
int funcSn; /**/ query.getInt(0, funcSn);
Id preClassId; /**/ query.getId(1, preClassId);
StringData* name; /**/ query.getStaticString(2, name);
bool top; /**/ query.getBool(3, top);
BlobDecoder extraBlob = /**/ query.getBlob(4);
FuncEmitter* fe;
if (preClassId < 0) {
fe = ue.newFuncEmitter(name, top);
} else {
PreClassEmitter* pce = ue.pce(preClassId);
fe = ue.newMethodEmitter(name, pce);
bool added UNUSED = pce->addMethod(fe);
assert(added);
}
assert(fe->sn() == funcSn);
fe->setTop(top);
fe->serdeMetaData(extraBlob);
fe->finish(fe->past(), true);
ue.recordFunction(fe);
}
} while (!query.done());
txn.commit();
}
} // HPHP::VM
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