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-rw-r--r--js/src/vm/UnboxedObject.cpp201
1 files changed, 2 insertions, 199 deletions
diff --git a/js/src/vm/UnboxedObject.cpp b/js/src/vm/UnboxedObject.cpp
index 806a9db81..a96fb58a8 100644
--- a/js/src/vm/UnboxedObject.cpp
+++ b/js/src/vm/UnboxedObject.cpp
@@ -67,205 +67,8 @@ static const uintptr_t CLEAR_CONSTRUCTOR_CODE_TOKEN = 0x1;
/* static */ bool
UnboxedLayout::makeConstructorCode(JSContext* cx, HandleObjectGroup group)
{
- gc::AutoSuppressGC suppress(cx);
-
- using namespace jit;
-
- if (!cx->compartment()->ensureJitCompartmentExists(cx))
- return false;
-
- UnboxedLayout& layout = group->unboxedLayout();
- MOZ_ASSERT(!layout.constructorCode());
-
- UnboxedPlainObject* templateObject = UnboxedPlainObject::create(cx, group, TenuredObject);
- if (!templateObject)
- return false;
-
- JitContext jitContext(cx, nullptr);
-
- MacroAssembler masm;
-
- Register propertiesReg, newKindReg;
-#ifdef JS_CODEGEN_X86
- propertiesReg = eax;
- newKindReg = ecx;
- masm.loadPtr(Address(masm.getStackPointer(), sizeof(void*)), propertiesReg);
- masm.loadPtr(Address(masm.getStackPointer(), 2 * sizeof(void*)), newKindReg);
-#else
- propertiesReg = IntArgReg0;
- newKindReg = IntArgReg1;
-#endif
-
-#ifdef JS_CODEGEN_ARM64
- // ARM64 communicates stack address via sp, but uses a pseudo-sp for addressing.
- masm.initStackPtr();
-#endif
-
- MOZ_ASSERT(propertiesReg.volatile_());
- MOZ_ASSERT(newKindReg.volatile_());
-
- AllocatableGeneralRegisterSet regs(GeneralRegisterSet::All());
- regs.take(propertiesReg);
- regs.take(newKindReg);
- Register object = regs.takeAny(), scratch1 = regs.takeAny(), scratch2 = regs.takeAny();
-
- LiveGeneralRegisterSet savedNonVolatileRegisters = SavedNonVolatileRegisters(regs);
- masm.PushRegsInMask(savedNonVolatileRegisters);
-
- // The scratch double register might be used by MacroAssembler methods.
- if (ScratchDoubleReg.volatile_())
- masm.push(ScratchDoubleReg);
-
- Label failure, tenuredObject, allocated;
- masm.branch32(Assembler::NotEqual, newKindReg, Imm32(GenericObject), &tenuredObject);
- masm.branchTest32(Assembler::NonZero, AbsoluteAddress(group->addressOfFlags()),
- Imm32(OBJECT_FLAG_PRE_TENURE), &tenuredObject);
-
- // Allocate an object in the nursery
- masm.createGCObject(object, scratch1, templateObject, gc::DefaultHeap, &failure,
- /* initFixedSlots = */ false);
-
- masm.jump(&allocated);
- masm.bind(&tenuredObject);
-
- // Allocate an object in the tenured heap.
- masm.createGCObject(object, scratch1, templateObject, gc::TenuredHeap, &failure,
- /* initFixedSlots = */ false);
-
- // If any of the properties being stored are in the nursery, add a store
- // buffer entry for the new object.
- Label postBarrier;
- for (size_t i = 0; i < layout.properties().length(); i++) {
- const UnboxedLayout::Property& property = layout.properties()[i];
- if (property.type == JSVAL_TYPE_OBJECT) {
- Address valueAddress(propertiesReg, i * sizeof(IdValuePair) + offsetof(IdValuePair, value));
- Label notObject;
- masm.branchTestObject(Assembler::NotEqual, valueAddress, &notObject);
- Register valueObject = masm.extractObject(valueAddress, scratch1);
- masm.branchPtrInNurseryChunk(Assembler::Equal, valueObject, scratch2, &postBarrier);
- masm.bind(&notObject);
- }
- }
-
- masm.jump(&allocated);
- masm.bind(&postBarrier);
-
- LiveGeneralRegisterSet liveVolatileRegisters;
- liveVolatileRegisters.add(propertiesReg);
- if (object.volatile_())
- liveVolatileRegisters.add(object);
- masm.PushRegsInMask(liveVolatileRegisters);
-
- masm.mov(ImmPtr(cx->runtime()), scratch1);
- masm.setupUnalignedABICall(scratch2);
- masm.passABIArg(scratch1);
- masm.passABIArg(object);
- masm.callWithABI(JS_FUNC_TO_DATA_PTR(void*, PostWriteBarrier));
-
- masm.PopRegsInMask(liveVolatileRegisters);
-
- masm.bind(&allocated);
-
- ValueOperand valueOperand;
-#ifdef JS_NUNBOX32
- valueOperand = ValueOperand(scratch1, scratch2);
-#else
- valueOperand = ValueOperand(scratch1);
-#endif
-
- Label failureStoreOther, failureStoreObject;
-
- for (size_t i = 0; i < layout.properties().length(); i++) {
- const UnboxedLayout::Property& property = layout.properties()[i];
- Address valueAddress(propertiesReg, i * sizeof(IdValuePair) + offsetof(IdValuePair, value));
- Address targetAddress(object, UnboxedPlainObject::offsetOfData() + property.offset);
-
- masm.loadValue(valueAddress, valueOperand);
-
- if (property.type == JSVAL_TYPE_OBJECT) {
- HeapTypeSet* types = group->maybeGetProperty(IdToTypeId(NameToId(property.name)));
-
- Label notObject;
- masm.branchTestObject(Assembler::NotEqual, valueOperand,
- types->mightBeMIRType(MIRType::Null) ? &notObject : &failureStoreObject);
-
- Register payloadReg = masm.extractObject(valueOperand, scratch1);
-
- if (!types->hasType(TypeSet::AnyObjectType())) {
- Register scratch = (payloadReg == scratch1) ? scratch2 : scratch1;
- masm.guardObjectType(payloadReg, types, scratch, &failureStoreObject);
- }
-
- masm.storeUnboxedProperty(targetAddress, JSVAL_TYPE_OBJECT,
- TypedOrValueRegister(MIRType::Object,
- AnyRegister(payloadReg)), nullptr);
-
- if (notObject.used()) {
- Label done;
- masm.jump(&done);
- masm.bind(&notObject);
- masm.branchTestNull(Assembler::NotEqual, valueOperand, &failureStoreOther);
- masm.storeUnboxedProperty(targetAddress, JSVAL_TYPE_OBJECT, NullValue(), nullptr);
- masm.bind(&done);
- }
- } else {
- masm.storeUnboxedProperty(targetAddress, property.type,
- ConstantOrRegister(valueOperand), &failureStoreOther);
- }
- }
-
- Label done;
- masm.bind(&done);
-
- if (object != ReturnReg)
- masm.movePtr(object, ReturnReg);
-
- // Restore non-volatile registers which were saved on entry.
- if (ScratchDoubleReg.volatile_())
- masm.pop(ScratchDoubleReg);
- masm.PopRegsInMask(savedNonVolatileRegisters);
-
- masm.abiret();
-
- masm.bind(&failureStoreOther);
-
- // There was a failure while storing a value which cannot be stored at all
- // in the unboxed object. Initialize the object so it is safe for GC and
- // return null.
- masm.initUnboxedObjectContents(object, templateObject);
-
- masm.bind(&failure);
-
- masm.movePtr(ImmWord(0), object);
- masm.jump(&done);
-
- masm.bind(&failureStoreObject);
-
- // There was a failure while storing a value to an object slot of the
- // unboxed object. If the value is storable, the failure occurred due to
- // incomplete type information in the object, so return a token to trigger
- // regeneration of the jitcode after a new object is created in the VM.
- {
- Label isObject;
- masm.branchTestObject(Assembler::Equal, valueOperand, &isObject);
- masm.branchTestNull(Assembler::NotEqual, valueOperand, &failureStoreOther);
- masm.bind(&isObject);
- }
-
- // Initialize the object so it is safe for GC.
- masm.initUnboxedObjectContents(object, templateObject);
-
- masm.movePtr(ImmWord(CLEAR_CONSTRUCTOR_CODE_TOKEN), object);
- masm.jump(&done);
-
- Linker linker(masm);
- AutoFlushICache afc("UnboxedObject");
- JitCode* code = linker.newCode<NoGC>(cx, OTHER_CODE);
- if (!code)
- return false;
-
- layout.setConstructorCode(code);
- return true;
+ // *** STUB ***
+ return false;
}
void
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-27 11:27:31 +0000