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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* vim: set ts=8 sts=2 et sw=2 tw=80:
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef vm_JSFunction_inl_h
#define vm_JSFunction_inl_h
#include "vm/JSFunction.h"
#include "gc/Allocator.h"
#include "gc/GCProbes.h"
#include "js/CharacterEncoding.h"
#include "vm/EnvironmentObject.h"
#include "vm/WellKnownAtom.h" // js_*_str
#include "vm/JSObject-inl.h"
#include "vm/NativeObject-inl.h"
namespace js {
inline const char* GetFunctionNameBytes(JSContext* cx, JSFunction* fun,
UniqueChars* bytes) {
if (JSAtom* name = fun->explicitName()) {
*bytes = StringToNewUTF8CharsZ(cx, *name);
return bytes->get();
}
return js_anonymous_str;
}
inline JSFunction* CloneFunctionObject(JSContext* cx, HandleFunction fun,
HandleObject enclosingEnv,
HandleObject proto = nullptr) {
// These intermediate variables are needed to avoid link errors on some
// platforms. Sigh.
gc::AllocKind finalizeKind = gc::AllocKind::FUNCTION;
gc::AllocKind extendedFinalizeKind = gc::AllocKind::FUNCTION_EXTENDED;
gc::AllocKind kind = fun->isExtended() ? extendedFinalizeKind : finalizeKind;
MOZ_ASSERT(CanReuseScriptForClone(cx->realm(), fun, enclosingEnv));
return CloneFunctionReuseScript(cx, fun, enclosingEnv, kind, proto);
}
} /* namespace js */
/* static */ inline JS::Result<JSFunction*, JS::OOM> JSFunction::create(
JSContext* cx, js::gc::AllocKind kind, js::gc::InitialHeap heap,
js::HandleShape shape) {
MOZ_ASSERT(kind == js::gc::AllocKind::FUNCTION ||
kind == js::gc::AllocKind::FUNCTION_EXTENDED);
debugCheckNewObject(shape, kind, heap);
const JSClass* clasp = shape->getObjectClass();
MOZ_ASSERT(clasp->isNativeObject());
MOZ_ASSERT(clasp->isJSFunction());
static constexpr size_t NumDynamicSlots = 0;
MOZ_ASSERT(calculateDynamicSlots(shape->numFixedSlots(), shape->slotSpan(),
clasp) == NumDynamicSlots);
JSObject* obj = js::AllocateObject(cx, kind, NumDynamicSlots, heap, clasp);
if (!obj) {
return cx->alreadyReportedOOM();
}
NativeObject* nobj = static_cast<NativeObject*>(obj);
nobj->initShape(shape);
nobj->initEmptyDynamicSlots();
nobj->setEmptyElements();
MOZ_ASSERT(!clasp->hasPrivate());
MOZ_ASSERT(shape->slotSpan() == 0);
JSFunction* fun = static_cast<JSFunction*>(nobj);
fun->nargs_ = 0;
// This must be overwritten by some ultimate caller: there's no default
// value to which we could sensibly initialize this.
MOZ_MAKE_MEM_UNDEFINED(&fun->u, sizeof(u));
fun->atom_.init(nullptr);
if (kind == js::gc::AllocKind::FUNCTION_EXTENDED) {
fun->setFlags(FunctionFlags::EXTENDED);
for (js::GCPtrValue& extendedSlot : fun->toExtended()->extendedSlots) {
extendedSlot.init(JS::UndefinedValue());
}
} else {
fun->setFlags(0);
}
MOZ_ASSERT(!clasp->shouldDelayMetadataBuilder(),
"Function has no extra data hanging off it, that wouldn't be "
"allocated at this point, that would require delaying the "
"building of metadata for it");
fun = SetNewObjectMetadata(cx, fun);
js::gc::gcprobes::CreateObject(fun);
return fun;
}
#endif /* vm_JSFunction_inl_h */