void Injection::execute() const {
if (m_builtin) {
ASSERT(m_callback);
// Execute function in runtime
m_callback(m_arg);
return;
}
// Execute php code piece
TypedValue retval;
VarEnv *varEnv = NULL;
ActRec *cfpSave = NULL;
ObjectData *this_ = NULL;
Class *cls = NULL;
ActRec *fp = g_vmContext->getFP();
if (fp) {
if (!fp->hasVarEnv()) {
fp->m_varEnv = VarEnv::createLazyAttach(fp);
}
varEnv = fp->m_varEnv;
cfpSave = varEnv->getCfp();
if (fp->hasThis()) {
this_ = fp->getThis();
} else if (fp->hasClass()) {
cls = fp->getClass();
}
}
// Note: For now we don't merge analysis code's class and function.
// Later we might decide to do so
g_vmContext->invokeFunc(&retval, m_unit->getMain(), Array::Create(), this_,
cls, varEnv, NULL, NULL);
if (varEnv) {
varEnv->setCfp(cfpSave);
}
}
c_Continuation::~c_Continuation() {
ActRec* ar = actRec();
if (ar->hasVarEnv()) {
ar->getVarEnv()->detach(ar);
} else {
frame_free_locals_inl(ar, ar->m_func->numLocals());
}
}
Variant f_func_get_args() {
EagerCallerFrame cf;
ActRec* ar = cf.actRecForArgs();
if (ar && ar->hasVarEnv() && ar->getVarEnv()->isGlobalScope()) {
raise_warning(
"func_get_args(): Called from the global scope - no function context"
);
return false;
}
return hhvm_get_frame_args(ar);
}
c_Continuation::~c_Continuation() {
ActRec* ar = actRec();
if (ar->hasVarEnv()) {
ar->getVarEnv()->detach(ar);
} else {
// Free locals, but don't trigger the EventHook for FunctionExit
// since the continuation function has already been exited. We
// don't want redundant calls.
frame_free_locals_inl_no_hook<false>(ar, ar->m_func->numLocals());
}
}
void c_Continuation::dupContVar(const StringData* name, TypedValue* src) {
ActRec *fp = actRec();
Id destId = fp->m_func->lookupVarId(name);
if (destId != kInvalidId) {
// Copy the value of the local to the cont object.
tvDupFlattenVars(src, frame_local(fp, destId));
} else {
if (!fp->hasVarEnv()) {
fp->setVarEnv(VarEnv::createLocal(fp));
}
fp->getVarEnv()->setWithRef(name, src);
}
}
int64_t f_func_num_args() {
EagerCallerFrame cf;
ActRec* ar = cf.actRecForArgs();
if (ar == NULL) {
return -1;
}
if (ar->hasVarEnv() && ar->getVarEnv()->isGlobalScope()) {
raise_warning(
"func_num_args(): Called from the global scope - no function context"
);
return -1;
}
return ar->numArgs();
}
void c_Continuation::dupContVar(const StringData* name, TypedValue* src) {
ActRec *fp = actRec();
Id destId = fp->m_func->lookupVarId(name);
if (destId != kInvalidId) {
// Copy the value of the local to the cont object.
tvDupFlattenVars(src, frame_local(fp, destId));
} else {
if (!fp->hasVarEnv()) {
// This VarEnv may potentially outlive the most recently stack-allocated
// VarEnv, so we need to heap allocate it.
fp->setVarEnv(VarEnv::createLocalOnHeap(fp));
}
fp->getVarEnv()->setWithRef(name, src);
}
}
ALWAYS_INLINE
static Variant func_get_arg_impl(int arg_num) {
CallerFrame cf;
ActRec* ar = cf.actRecForArgs();
if (ar == nullptr) {
return false;
}
if (ar->hasVarEnv() && ar->getVarEnv()->isGlobalScope()) {
raise_warning(
"func_get_arg(): Called from the global scope - no function context"
);
return false;
}
if (arg_num < 0) {
raise_warning(
"func_get_arg(): The argument number should be >= 0"
);
return false;
}
if (arg_num >= ar->numArgs()) {
raise_warning(
"func_get_arg(): Argument %d not passed to function", arg_num
);
return false;
}
const int numParams = ar->m_func->numNonVariadicParams();
if (arg_num < numParams) {
// Formal parameter. Value is on the stack.
TypedValue* loc =
(TypedValue*)(uintptr_t(ar) - (arg_num + 1) * sizeof(TypedValue));
return tvAsVariant(loc);
}
const int numArgs = ar->numArgs();
const int extraArgs = numArgs - numParams;
// Not a formal parameter. Value is potentially in the
// ExtraArgs/VarEnv.
const int extraArgNum = arg_num - numParams;
if (extraArgNum < extraArgs) {
return tvAsVariant(ar->getExtraArg(extraArgNum));
}
return false;
}
c_Continuation::~c_Continuation() {
ActRec* ar = actRec();
// The first local is the object itself, and it wasn't increffed at creation
// time (see createContinuation()). Overwrite its type to exempt it from
// refcounting here.
TypedValue* contLocal = frame_local(ar, 0);
assert(contLocal->m_data.pobj == this);
contLocal->m_type = KindOfNull;
if (ar->hasVarEnv()) {
ar->getVarEnv()->detach(ar);
} else {
frame_free_locals_inl(ar, m_vmFunc->numLocals());
}
}
Array createBacktrace(const BacktraceArgs& btArgs) {
auto bt = Array::Create();
// If there is a parser frame, put it at the beginning of the backtrace.
if (btArgs.m_parserFrame) {
bt.append(
make_map_array(
s_file, btArgs.m_parserFrame->filename,
s_line, btArgs.m_parserFrame->lineNumber
)
);
}
VMRegAnchor _;
// If there are no VM frames, we're done.
if (!rds::header() || !vmfp()) return bt;
int depth = 0;
ActRec* fp = nullptr;
Offset pc = 0;
// Get the fp and pc of the top frame (possibly skipping one frame).
if (btArgs.m_skipTop) {
fp = getPrevActRec(vmfp(), &pc);
// We skipped over the only VM frame, we're done.
if (!fp) return bt;
} else {
fp = vmfp();
auto const unit = fp->func()->unit();
assert(unit);
pc = unit->offsetOf(vmpc());
}
// Handle the top frame.
if (btArgs.m_withSelf) {
// Builtins don't have a file and line number.
if (!fp->func()->isBuiltin()) {
auto const unit = fp->func()->unit();
assert(unit);
auto const filename = fp->func()->filename();
ArrayInit frame(btArgs.m_parserFrame ? 4 : 2, ArrayInit::Map{});
frame.set(s_file, Variant{const_cast<StringData*>(filename)});
frame.set(s_line, unit->getLineNumber(pc));
if (btArgs.m_parserFrame) {
frame.set(s_function, s_include);
frame.set(s_args, Array::Create(btArgs.m_parserFrame->filename));
}
bt.append(frame.toVariant());
depth++;
}
}
// Handle the subsequent VM frames.
Offset prevPc = 0;
for (auto prevFp = getPrevActRec(fp, &prevPc);
fp != nullptr && (btArgs.m_limit == 0 || depth < btArgs.m_limit);
fp = prevFp, pc = prevPc,
prevFp = getPrevActRec(fp, &prevPc)) {
// Do not capture frame for HPHP only functions.
if (fp->func()->isNoInjection()) continue;
ArrayInit frame(7, ArrayInit::Map{});
auto const curUnit = fp->func()->unit();
auto const curOp = *reinterpret_cast<const Op*>(curUnit->at(pc));
auto const isReturning =
curOp == Op::RetC || curOp == Op::RetV ||
curOp == Op::CreateCont || curOp == Op::Await ||
fp->localsDecRefd();
// Builtins and generators don't have a file and line number
if (prevFp && !prevFp->func()->isBuiltin()) {
auto const prevUnit = prevFp->func()->unit();
auto prevFile = prevUnit->filepath();
if (prevFp->func()->originalFilename()) {
prevFile = prevFp->func()->originalFilename();
}
assert(prevFile);
frame.set(s_file, Variant{const_cast<StringData*>(prevFile)});
// In the normal method case, the "saved pc" for line number printing is
// pointing at the cell conversion (Unbox/Pop) instruction, not the call
// itself. For multi-line calls, this instruction is associated with the
// subsequent line which results in an off-by-n. We're subtracting one
// in order to look up the line associated with the FCall/FCallArray
// instruction. Exception handling and the other opcodes (ex. BoxR)
// already do the right thing. The emitter associates object access with
// the subsequent expression and this would be difficult to modify.
auto const opAtPrevPc =
*reinterpret_cast<const Op*>(prevUnit->at(prevPc));
Offset pcAdjust = 0;
if (opAtPrevPc == Op::PopR ||
opAtPrevPc == Op::UnboxR ||
opAtPrevPc == Op::UnboxRNop) {
pcAdjust = 1;
}
frame.set(s_line,
prevFp->func()->unit()->getLineNumber(prevPc - pcAdjust));
}
// Check for include.
String funcname{const_cast<StringData*>(fp->func()->name())};
if (fp->func()->isClosureBody()) {
// Strip the file hash from the closure name.
String fullName{const_cast<StringData*>(fp->func()->baseCls()->name())};
funcname = fullName.substr(0, fullName.find(';'));
}
// Check for pseudomain.
if (funcname.empty()) {
if (!prevFp && !btArgs.m_withPseudoMain) continue;
else if (!prevFp) funcname = s_main;
else funcname = s_include;
}
frame.set(s_function, funcname);
if (!funcname.same(s_include)) {
// Closures have an m_this but they aren't in object context.
auto ctx = arGetContextClass(fp);
if (ctx != nullptr && !fp->func()->isClosureBody()) {
frame.set(s_class, Variant{const_cast<StringData*>(ctx->name())});
if (fp->hasThis() && !isReturning) {
if (btArgs.m_withThis) {
frame.set(s_object, Object(fp->getThis()));
}
frame.set(s_type, s_arrow);
} else {
frame.set(s_type, s_double_colon);
}
}
}
bool const mayUseVV = fp->func()->attrs() & AttrMayUseVV;
auto const withNames = btArgs.m_withArgNames;
auto const withValues = btArgs.m_withArgValues;
if (!btArgs.m_withArgNames && !btArgs.m_withArgValues) {
// do nothing
} else if (funcname.same(s_include)) {
if (depth != 0) {
auto filepath = const_cast<StringData*>(curUnit->filepath());
frame.set(s_args, make_packed_array(filepath));
}
} else if (!RuntimeOption::EnableArgsInBacktraces || isReturning) {
// Provide an empty 'args' array to be consistent with hphpc.
frame.set(s_args, empty_array());
} else {
auto args = Array::Create();
auto const nparams = fp->func()->numNonVariadicParams();
auto const nargs = fp->numArgs();
auto const nformals = std::min<int>(nparams, nargs);
if (UNLIKELY(mayUseVV) &&
UNLIKELY(fp->hasVarEnv() && fp->getVarEnv()->getFP() != fp)) {
// VarEnv is attached to eval or debugger frame, other than the current
// frame. Access locals thru VarEnv.
auto varEnv = fp->getVarEnv();
auto func = fp->func();
for (int i = 0; i < nformals; i++) {
auto const argname = func->localVarName(i);
auto const tv = varEnv->lookup(argname);
Variant val;
if (tv != nullptr) { // the variable hasn't been unset
val = withValues ? tvAsVariant(tv) : "";
}
if (withNames) {
args.set(String(const_cast<StringData*>(argname)), val);
} else {
args.append(val);
}
}
} else {
for (int i = 0; i < nformals; i++) {
Variant val = withValues ? tvAsVariant(frame_local(fp, i)) : "";
if (withNames) {
auto const argname = fp->func()->localVarName(i);
args.set(String(const_cast<StringData*>(argname)), val);
} else {
args.append(val);
}
}
}
// Builtin extra args are not stored in varenv.
if (UNLIKELY(mayUseVV) && nargs > nparams && fp->hasExtraArgs()) {
for (int i = nparams; i < nargs; i++) {
auto arg = fp->getExtraArg(i - nparams);
args.append(tvAsVariant(arg));
}
}
frame.set(s_args, args);
}
if (btArgs.m_withMetadata && !isReturning) {
if (UNLIKELY(mayUseVV) && UNLIKELY(fp->hasVarEnv())) {
auto tv = fp->getVarEnv()->lookup(s_86metadata.get());
if (tv != nullptr && tv->m_type != KindOfUninit) {
frame.set(s_metadata, tvAsVariant(tv));
}
} else {
auto local = fp->func()->lookupVarId(s_86metadata.get());
if (local != kInvalidId) {
auto tv = frame_local(fp, local);
if (tv->m_type != KindOfUninit) {
frame.set(s_metadata, tvAsVariant(tv));
}
}
}
}
bt.append(frame.toVariant());
depth++;
}
return bt;
}
bool UrlFile::open(const String& input_url, const String& mode) {
String url = input_url;
const char* modestr = mode.c_str();
if (strchr(modestr, '+') || strchr(modestr, 'a') || strchr(modestr, 'w')) {
std::string msg = "cannot open a url stream for write/append operation: ";
msg += url.c_str();
m_error = msg;
return false;
}
HttpClient http(m_timeout, m_maxRedirect);
auto ctx = this->getStreamContext();
if (ctx) {
http.setStreamContextOptions(ctx->getOptions());
}
m_response.clear();
if (!m_proxyHost.empty()) {
http.proxy(m_proxyHost, m_proxyPort, m_proxyUsername, m_proxyPassword);
}
HeaderMap *pHeaders = nullptr;
HeaderMap requestHeaders;
if (!m_headers.empty()) {
pHeaders = &requestHeaders;
for (ArrayIter iter(m_headers); iter; ++iter) {
requestHeaders[std::string(iter.first().toString().data())].
push_back(iter.second().toString().data());
}
}
Variant user = f_parse_url(url, k_PHP_URL_USER);
if (user.isString()) {
Variant pass = f_parse_url(url, k_PHP_URL_PASS);
http.auth(user.toString().c_str(), pass.toString().c_str());
url = HHVM_FN(preg_replace)(
s_remove_user_pass_pattern,
s_remove_user_pass_replace,
url,
1
).toString();
}
int code;
std::vector<String> responseHeaders;
if (m_get) {
code = http.get(url.c_str(), m_response, pHeaders, &responseHeaders);
} else {
code = http.request(m_method,
url.c_str(), m_postData.data(), m_postData.size(),
m_response, pHeaders, &responseHeaders);
}
m_responseHeaders.reset();
for (unsigned int i = 0; i < responseHeaders.size(); i++) {
m_responseHeaders.append(responseHeaders[i]);
}
VMRegAnchor vra;
ActRec* fp = vmfp();
while (fp->skipFrame()) {
fp = g_context->getPrevVMState(fp);
}
auto id = fp->func()->lookupVarId(s_http_response_header.get());
if (id != kInvalidId) {
auto tvTo = frame_local(fp, id);
Variant varFrom(m_responseHeaders);
const auto tvFrom(varFrom.asTypedValue());
if (tvTo->m_type == KindOfRef) {
tvTo = tvTo->m_data.pref->tv();
}
tvDup(*tvFrom, *tvTo);
} else if ((fp->func()->attrs() & AttrMayUseVV) && fp->hasVarEnv()) {
fp->getVarEnv()->set(s_http_response_header.get(),
Variant(m_responseHeaders).asTypedValue());
}
/*
* If code == 0, Curl failed to connect; per PHP5, ignore_errors just means
* to not worry if we get an http resonse code that isn't between 200 and 400,
* but we shouldn't ignore other errors.
* all status codes in the 2xx range are defined by the specification as
* successful;
* all status codes in the 3xx range are for redirection, and so also should
* never fail.
*/
if ((code >= 200 && code < 400) || (m_ignoreErrors && code != 0)) {
setName(url.toCppString());
m_data = const_cast<char*>(m_response.data());
m_len = m_response.size();
return true;
} else {
m_error = http.getLastError().c_str();
return false;
}
}
Array createBacktrace(const BacktraceArgs& btArgs) {
Array bt = Array::Create();
// If there is a parser frame, put it at the beginning of
// the backtrace
if (btArgs.m_parserFrame) {
bt.append(
make_map_array(
s_file, btArgs.m_parserFrame->filename,
s_line, btArgs.m_parserFrame->lineNumber
)
);
}
VMRegAnchor _;
if (!vmfp()) {
// If there are no VM frames, we're done
return bt;
}
int depth = 0;
ActRec* fp = nullptr;
Offset pc = 0;
// Get the fp and pc of the top frame (possibly skipping one frame)
{
if (btArgs.m_skipTop) {
fp = g_context->getPrevVMState(vmfp(), &pc);
if (!fp) {
// We skipped over the only VM frame, we're done
return bt;
}
} else {
fp = vmfp();
Unit *unit = vmfp()->m_func->unit();
assert(unit);
pc = unit->offsetOf(vmpc());
}
// Handle the top frame
if (btArgs.m_withSelf) {
// Builtins don't have a file and line number
if (!fp->m_func->isBuiltin()) {
Unit* unit = fp->m_func->unit();
assert(unit);
const char* filename = fp->m_func->filename()->data();
Offset off = pc;
ArrayInit frame(btArgs.m_parserFrame ? 4 : 2, ArrayInit::Map{});
frame.set(s_file, filename);
frame.set(s_line, unit->getLineNumber(off));
if (btArgs.m_parserFrame) {
frame.set(s_function, s_include);
frame.set(s_args, Array::Create(btArgs.m_parserFrame->filename));
}
bt.append(frame.toVariant());
depth++;
}
}
}
// Handle the subsequent VM frames
Offset prevPc = 0;
for (ActRec* prevFp = g_context->getPrevVMState(fp, &prevPc);
fp != nullptr && (btArgs.m_limit == 0 || depth < btArgs.m_limit);
fp = prevFp, pc = prevPc,
prevFp = g_context->getPrevVMState(fp, &prevPc)) {
// do not capture frame for HPHP only functions
if (fp->m_func->isNoInjection()) {
continue;
}
ArrayInit frame(7, ArrayInit::Map{});
auto const curUnit = fp->m_func->unit();
auto const curOp = *reinterpret_cast<const Op*>(curUnit->at(pc));
auto const isReturning =
curOp == Op::RetC || curOp == Op::RetV ||
curOp == Op::CreateCont || curOp == Op::Await ||
fp->localsDecRefd();
// Builtins and generators don't have a file and line number
if (prevFp && !prevFp->m_func->isBuiltin() && !fp->resumed()) {
auto const prevUnit = prevFp->m_func->unit();
auto prevFile = prevUnit->filepath();
if (prevFp->m_func->originalFilename()) {
prevFile = prevFp->m_func->originalFilename();
}
assert(prevFile);
frame.set(s_file, const_cast<StringData*>(prevFile));
// In the normal method case, the "saved pc" for line number printing is
// pointing at the cell conversion (Unbox/Pop) instruction, not the call
// itself. For multi-line calls, this instruction is associated with the
// subsequent line which results in an off-by-n. We're subtracting one
// in order to look up the line associated with the FCall/FCallArray
// instruction. Exception handling and the other opcodes (ex. BoxR)
// already do the right thing. The emitter associates object access with
// the subsequent expression and this would be difficult to modify.
auto const opAtPrevPc =
*reinterpret_cast<const Op*>(prevUnit->at(prevPc));
Offset pcAdjust = 0;
if (opAtPrevPc == OpPopR || opAtPrevPc == OpUnboxR) {
pcAdjust = 1;
}
frame.set(s_line,
prevFp->m_func->unit()->getLineNumber(prevPc - pcAdjust));
}
// check for include
String funcname = const_cast<StringData*>(fp->m_func->name());
if (fp->m_func->isClosureBody()) {
static StringData* s_closure_label =
makeStaticString("{closure}");
funcname = s_closure_label;
}
// check for pseudomain
if (funcname.empty()) {
if (!prevFp) continue;
funcname = s_include;
}
frame.set(s_function, funcname);
if (!funcname.same(s_include)) {
// Closures have an m_this but they aren't in object context
Class* ctx = arGetContextClass(fp);
if (ctx != nullptr && !fp->m_func->isClosureBody()) {
frame.set(s_class, ctx->name()->data());
if (fp->hasThis() && !isReturning) {
if (btArgs.m_withThis) {
frame.set(s_object, Object(fp->getThis()));
}
frame.set(s_type, "->");
} else {
frame.set(s_type, "::");
}
}
}
Array args = Array::Create();
if (btArgs.m_ignoreArgs) {
// do nothing
} else if (funcname.same(s_include)) {
if (depth) {
args.append(const_cast<StringData*>(curUnit->filepath()));
frame.set(s_args, args);
}
} else if (!RuntimeOption::EnableArgsInBacktraces || isReturning) {
// Provide an empty 'args' array to be consistent with hphpc
frame.set(s_args, args);
} else {
const int nparams = fp->m_func->numNonVariadicParams();
int nargs = fp->numArgs();
int nformals = std::min(nparams, nargs);
if (UNLIKELY(fp->hasVarEnv() && fp->getVarEnv()->getFP() != fp)) {
// VarEnv is attached to eval or debugger frame, other than the current
// frame. Access locals thru VarEnv.
auto varEnv = fp->getVarEnv();
auto func = fp->func();
for (int i = 0; i < nformals; i++) {
TypedValue *arg = varEnv->lookup(func->localVarName(i));
args.append(tvAsVariant(arg));
}
} else {
for (int i = 0; i < nformals; i++) {
TypedValue *arg = frame_local(fp, i);
args.append(tvAsVariant(arg));
}
}
/* builtin extra args are not stored in varenv */
if (nargs > nparams && fp->hasExtraArgs()) {
for (int i = nparams; i < nargs; i++) {
TypedValue *arg = fp->getExtraArg(i - nparams);
args.append(tvAsVariant(arg));
}
}
frame.set(s_args, args);
}
bt.append(frame.toVariant());
depth++;
}
return bt;
}
