// Copyright 2006-2009 the V8 project authors. All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following
// disclaimer in the documentation and/or other materials provided
// with the distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include "v8.h"
#include "ic-inl.h"
#include "codegen-inl.h"
#include "stub-cache.h"
namespace v8 {
namespace internal {
#define __ ACCESS_MASM(masm)
static void ProbeTable(MacroAssembler* masm,
Code::Flags flags,
StubCache::Table table,
Register name,
Register offset) {
ExternalReference key_offset(SCTableReference::keyReference(table));
ExternalReference value_offset(SCTableReference::valueReference(table));
Label miss;
// Save the offset on the stack.
__ push(offset);
// Check that the key in the entry matches the name.
__ mov(ip, Operand(key_offset));
__ ldr(ip, MemOperand(ip, offset, LSL, 1));
__ cmp(name, Operand(ip));
__ b(ne, &miss);
// Get the code entry from the cache.
__ mov(ip, Operand(value_offset));
__ ldr(offset, MemOperand(ip, offset, LSL, 1));
// Check that the flags match what we're looking for.
__ ldr(offset, FieldMemOperand(offset, Code::kFlagsOffset));
__ and_(offset, offset, Operand(~Code::kFlagsNotUsedInLookup));
__ cmp(offset, Operand(flags));
__ b(ne, &miss);
// Restore offset and re-load code entry from cache.
__ pop(offset);
__ mov(ip, Operand(value_offset));
__ ldr(offset, MemOperand(ip, offset, LSL, 1));
// Jump to the first instruction in the code stub.
__ add(offset, offset, Operand(Code::kHeaderSize - kHeapObjectTag));
__ Jump(offset);
// Miss: Restore offset and fall through.
__ bind(&miss);
__ pop(offset);
}
void StubCache::GenerateProbe(MacroAssembler* masm,
Code::Flags flags,
Register receiver,
Register name,
Register scratch,
Register extra) {
Label miss;
// Make sure that code is valid. The shifting code relies on the
// entry size being 8.
ASSERT(sizeof(Entry) == 8);
// Make sure the flags does not name a specific type.
ASSERT(Code::ExtractTypeFromFlags(flags) == 0);
// Make sure that there are no register conflicts.
ASSERT(!scratch.is(receiver));
ASSERT(!scratch.is(name));
// Check that the receiver isn't a smi.
__ tst(receiver, Operand(kSmiTagMask));
__ b(eq, &miss);
// Get the map of the receiver and compute the hash.
__ ldr(scratch, FieldMemOperand(name, String::kLengthOffset));
__ ldr(ip, FieldMemOperand(receiver, HeapObject::kMapOffset));
__ add(scratch, scratch, Operand(ip));
__ eor(scratch, scratch, Operand(flags));
__ and_(scratch,
scratch,
Operand((kPrimaryTableSize - 1) << kHeapObjectTagSize));
// Probe the primary table.
ProbeTable(masm, flags, kPrimary, name, scratch);
// Primary miss: Compute hash for secondary probe.
__ sub(scratch, scratch, Operand(name));
__ add(scratch, scratch, Operand(flags));
__ and_(scratch,
scratch,
Operand((kSecondaryTableSize - 1) << kHeapObjectTagSize));
// Probe the secondary table.
ProbeTable(masm, flags, kSecondary, name, scratch);
// Cache miss: Fall-through and let caller handle the miss by
// entering the runtime system.
__ bind(&miss);
}
void StubCompiler::GenerateLoadGlobalFunctionPrototype(MacroAssembler* masm,
int index,
Register prototype) {
// Load the global or builtins object from the current context.
__ ldr(prototype, MemOperand(cp, Context::SlotOffset(Context::GLOBAL_INDEX)));
// Load the global context from the global or builtins object.
__ ldr(prototype,
FieldMemOperand(prototype, GlobalObject::kGlobalContextOffset));
// Load the function from the global context.
__ ldr(prototype, MemOperand(prototype, Context::SlotOffset(index)));
// Load the initial map. The global functions all have initial maps.
__ ldr(prototype,
FieldMemOperand(prototype, JSFunction::kPrototypeOrInitialMapOffset));
// Load the prototype from the initial map.
__ ldr(prototype, FieldMemOperand(prototype, Map::kPrototypeOffset));
}
// Load a fast property out of a holder object (src). In-object properties
// are loaded directly otherwise the property is loaded from the properties
// fixed array.
void StubCompiler::GenerateFastPropertyLoad(MacroAssembler* masm,
Register dst, Register src,
JSObject* holder, int index) {
// Adjust for the number of properties stored in the holder.
index -= holder->map()->inobject_properties();
if (index < 0) {
// Get the property straight out of the holder.
int offset = holder->map()->instance_size() + (index * kPointerSize);
__ ldr(dst, FieldMemOperand(src, offset));
} else {
// Calculate the offset into the properties array.
int offset = index * kPointerSize + FixedArray::kHeaderSize;
__ ldr(dst, FieldMemOperand(src, JSObject::kPropertiesOffset));
__ ldr(dst, FieldMemOperand(dst, offset));
}
}
void StubCompiler::GenerateLoadArrayLength(MacroAssembler* masm,
Register receiver,
Register scratch,
Label* miss_label) {
// Check that the receiver isn't a smi.
__ tst(receiver, Operand(kSmiTagMask));
__ b(eq, miss_label);
// Check that the object is a JS array.
__ CompareObjectType(receiver, scratch, scratch, JS_ARRAY_TYPE);
__ b(ne, miss_label);
// Load length directly from the JS array.
__ ldr(r0, FieldMemOperand(receiver, JSArray::kLengthOffset));
__ Ret();
}
// Generate code to check if an object is a string. If the object is
// a string, the map's instance type is left in the scratch1 register.
static void GenerateStringCheck(MacroAssembler* masm,
Register receiver,
Register scratch1,
Register scratch2,
Label* smi,
Label* non_string_object) {
// Check that the receiver isn't a smi.
__ tst(receiver, Operand(kSmiTagMask));
__ b(eq, smi);
// Check that the object is a string.
__ ldr(scratch1, FieldMemOperand(receiver, HeapObject::kMapOffset));
__ ldrb(scratch1, FieldMemOperand(scratch1, Map::kInstanceTypeOffset));
__ and_(scratch2, scratch1, Operand(kIsNotStringMask));
// The cast is to resolve the overload for the argument of 0x0.
__ cmp(scratch2, Operand(static_cast<int32_t>(kStringTag)));
__ b(ne, non_string_object);
}
// Generate code to load the length from a string object and return the length.
// If the receiver object is not a string or a wrapped string object the
// execution continues at the miss label. The register containing the
// receiver is potentially clobbered.
void StubCompiler::GenerateLoadStringLength2(MacroAssembler* masm,
Register receiver,
Register scratch1,
Register scratch2,
Label* miss) {
Label check_string, check_wrapper;
__ bind(&check_string);
// Check if the object is a string leaving the instance type in the
// scratch1 register.
GenerateStringCheck(masm, receiver, scratch1, scratch2,
miss, &check_wrapper);
// Load length directly from the string.
__ and_(scratch1, scratch1, Operand(kStringSizeMask));
__ add(scratch1, scratch1, Operand(String::kHashShift));
__ ldr(r0, FieldMemOperand(receiver, String::kLengthOffset));
__ mov(r0, Operand(r0, LSR, scratch1));
__ mov(r0, Operand(r0, LSL, kSmiTagSize));
__ Ret();
// Check if the object is a JSValue wrapper.
__ bind(&check_wrapper);
__ cmp(scratch1, Operand(JS_VALUE_TYPE));
__ b(ne, miss);
// Unwrap the value in place and check if the wrapped value is a string.
__ ldr(receiver, FieldMemOperand(receiver, JSValue::kValueOffset));
__ b(&check_string);
}
void StubCompiler::GenerateLoadFunctionPrototype(MacroAssembler* masm,
Register receiver,
Register scratch1,
Register scratch2,
Label* miss_label) {
__ TryGetFunctionPrototype(receiver, scratch1, scratch2, miss_label);
__ mov(r0, scratch1);
__ Ret();
}
// Generate StoreField code, value is passed in r0 register.
// After executing generated code, the receiver_reg and name_reg
// may be clobbered.
void StubCompiler::GenerateStoreField(MacroAssembler* masm,
Builtins::Name storage_extend,
JSObject* object,
int index,
Map* transition,
Register receiver_reg,
Register name_reg,
Register scratch,
Label* miss_label) {
// r0 : value
Label exit;
// Check that the receiver isn't a smi.
__ tst(receiver_reg, Operand(kSmiTagMask));
__ b(eq, miss_label);
// Check that the map of the receiver hasn't changed.
__ ldr(scratch, FieldMemOperand(receiver_reg, HeapObject::kMapOffset));
__ cmp(scratch, Operand(Handle<Map>(object->map())));
__ b(ne, miss_label);
// Perform global security token check if needed.
if (object->IsJSGlobalProxy()) {
__ CheckAccessGlobalProxy(receiver_reg, scratch, miss_label);
}
// Stub never generated for non-global objects that require access
// checks.
ASSERT(object->IsJSGlobalProxy() || !object->IsAccessCheckNeeded());
// Perform map transition for the receiver if necessary.
if ((transition != NULL) && (object->map()->unused_property_fields() == 0)) {
// The properties must be extended before we can store the value.
// We jump to a runtime call that extends the properties array.
__ mov(r2, Operand(Handle<Map>(transition)));
// Please note, if we implement keyed store for arm we need
// to call the Builtins::KeyedStoreIC_ExtendStorage.
Handle<Code> ic(Builtins::builtin(Builtins::StoreIC_ExtendStorage));
__ Jump(ic, RelocInfo::CODE_TARGET);
return;
}
if (transition != NULL) {
// Update the map of the object; no write barrier updating is
// needed because the map is never in new space.
__ mov(ip, Operand(Handle<Map>(transition)));
__ str(ip, FieldMemOperand(receiver_reg, HeapObject::kMapOffset));
}
// Adjust for the number of properties stored in the object. Even in the
// face of a transition we can use the old map here because the size of the
// object and the number of in-object properties is not going to change.
index -= object->map()->inobject_properties();
if (index < 0) {
// Set the property straight into the object.
int offset = object->map()->instance_size() + (index * kPointerSize);
__ str(r0, FieldMemOperand(receiver_reg, offset));
// Skip updating write barrier if storing a smi.
__ tst(r0, Operand(kSmiTagMask));
__ b(eq, &exit);
// Update the write barrier for the array address.
// Pass the value being stored in the now unused name_reg.
__ mov(name_reg, Operand(offset));
__ RecordWrite(receiver_reg, name_reg, scratch);
} else {
// Write to the properties array.
int offset = index * kPointerSize + FixedArray::kHeaderSize;
// Get the properties array
__ ldr(scratch, FieldMemOperand(receiver_reg, JSObject::kPropertiesOffset));
__ str(r0, FieldMemOperand(scratch, offset));
// Skip updating write barrier if storing a smi.
__ tst(r0, Operand(kSmiTagMask));
__ b(eq, &exit);
// Update the write barrier for the array address.
// Ok to clobber receiver_reg and name_reg, since we return.
__ mov(name_reg, Operand(offset));
__ RecordWrite(scratch, name_reg, receiver_reg);
}
// Return the value (register r0).
__ bind(&exit);
__ Ret();
}
void StubCompiler::GenerateLoadMiss(MacroAssembler* masm, Code::Kind kind) {
ASSERT(kind == Code::LOAD_IC || kind == Code::KEYED_LOAD_IC);
Code* code = NULL;
if (kind == Code::LOAD_IC) {
code = Builtins::builtin(Builtins::LoadIC_Miss);
} else {
code = Builtins::builtin(Builtins::KeyedLoadIC_Miss);
}
Handle<Code> ic(code);
__ Jump(ic, RelocInfo::CODE_TARGET);
}
#undef __
#define __ ACCESS_MASM(masm())
Register StubCompiler::CheckPrototypes(JSObject* object,
Register object_reg,
JSObject* holder,
Register holder_reg,
Register scratch,
String* name,
Label* miss) {
// Check that the maps haven't changed.
Register result =
masm()->CheckMaps(object, object_reg, holder, holder_reg, scratch, miss);
// If we've skipped any global objects, it's not enough to verify
// that their maps haven't changed.
while (object != holder) {
if (object->IsGlobalObject()) {
GlobalObject* global = GlobalObject::cast(object);
Object* probe = global->EnsurePropertyCell(name);
if (probe->IsFailure()) {
set_failure(Failure::cast(probe));
return result;
}
JSGlobalPropertyCell* cell = JSGlobalPropertyCell::cast(probe);
ASSERT(cell->value()->IsTheHole());
__ mov(scratch, Operand(Handle<Object>(cell)));
__ ldr(scratch,
FieldMemOperand(scratch, JSGlobalPropertyCell::kValueOffset));
__ LoadRoot(ip, Heap::kTheHoleValueRootIndex);
__ cmp(scratch, ip);
__ b(ne, miss);
}
object = JSObject::cast(object->GetPrototype());
}
// Return the register containin the holder.
return result;
}
void StubCompiler::GenerateLoadField(JSObject* object,
JSObject* holder,
Register receiver,
Register scratch1,
Register scratch2,
int index,
String* name,
Label* miss) {
// Check that the receiver isn't a smi.
__ tst(receiver, Operand(kSmiTagMask));
__ b(eq, miss);
// Check that the maps haven't changed.
Register reg =
CheckPrototypes(object, receiver, holder, scratch1, scratch2, name, miss);
GenerateFastPropertyLoad(masm(), r0, reg, holder, index);
__ Ret();
}
void StubCompiler::GenerateLoadConstant(JSObject* object,
JSObject* holder,
Register receiver,
Register scratch1,
Register scratch2,
Object* value,
String* name,
Label* miss) {
// Check that the receiver isn't a smi.
__ tst(receiver, Operand(kSmiTagMask));
__ b(eq, miss);
// Check that the maps haven't changed.
Register reg =
CheckPrototypes(object, receiver, holder, scratch1, scratch2, name, miss);
// Return the constant value.
__ mov(r0, Operand(Handle<Object>(value)));
__ Ret();
}
void StubCompiler::GenerateLoadCallback(JSObject* object,
JSObject* holder,
Register receiver,
Register name_reg,
Register scratch1,
Register scratch2,
AccessorInfo* callback,
String* name,
Label* miss) {
// Check that the receiver isn't a smi.
__ tst(receiver, Operand(kSmiTagMask));
__ b(eq, miss);
// Check that the maps haven't changed.
Register reg =
CheckPrototypes(object, receiver, holder, scratch1, scratch2, name, miss);
// Push the arguments on the JS stack of the caller.
__ push(receiver); // receiver
__ push(reg); // holder
__ mov(ip, Operand(Handle<AccessorInfo>(callback))); // callback data
__ push(ip);
__ ldr(reg, FieldMemOperand(ip, AccessorInfo::kDataOffset));
__ push(reg);
__ push(name_reg); // name
// Do tail-call to the runtime system.
ExternalReference load_callback_property =
ExternalReference(IC_Utility(IC::kLoadCallbackProperty));
__ TailCallRuntime(load_callback_property, 5);
}
void StubCompiler::GenerateLoadInterceptor(JSObject* object,
JSObject* holder,
LookupResult* lookup,
Register receiver,
Register name_reg,
Register scratch1,
Register scratch2,
String* name,
Label* miss) {
// Check that the receiver isn't a smi.
__ tst(receiver, Operand(kSmiTagMask));
__ b(eq, miss);
// Check that the maps haven't changed.
Register reg =
CheckPrototypes(object, receiver, holder, scratch1, scratch2, name, miss);
// Push the arguments on the JS stack of the caller.
__ push(receiver); // receiver
__ push(reg); // holder
__ push(name_reg); // name
InterceptorInfo* interceptor = holder->GetNamedInterceptor();
ASSERT(!Heap::InNewSpace(interceptor));
__ mov(scratch1, Operand(Handle<Object>(interceptor)));
__ push(scratch1);
__ ldr(scratch2, FieldMemOperand(scratch1, InterceptorInfo::kDataOffset));
__ push(scratch2);
// Do tail-call to the runtime system.
ExternalReference load_ic_property =
ExternalReference(IC_Utility(IC::kLoadPropertyWithInterceptorForLoad));
__ TailCallRuntime(load_ic_property, 5);
}
Object* StubCompiler::CompileLazyCompile(Code::Flags flags) {
// ----------- S t a t e -------------
// -- r1: function
// -- lr: return address
// -----------------------------------
// Enter an internal frame.
__ EnterInternalFrame();
// Preserve the function.
__ push(r1);
// Push the function on the stack as the argument to the runtime function.
__ push(r1);
__ CallRuntime(Runtime::kLazyCompile, 1);
// Calculate the entry point.
__ add(r2, r0, Operand(Code::kHeaderSize - kHeapObjectTag));
// Restore saved function.
__ pop(r1);
// Tear down temporary frame.
__ LeaveInternalFrame();
// Do a tail-call of the compiled function.
__ Jump(r2);
return GetCodeWithFlags(flags, "LazyCompileStub");
}
Object* CallStubCompiler::CompileCallField(Object* object,
JSObject* holder,
int index,
String* name) {
// ----------- S t a t e -------------
// -- lr: return address
// -----------------------------------
Label miss;
const int argc = arguments().immediate();
// Get the receiver of the function from the stack into r0.
__ ldr(r0, MemOperand(sp, argc * kPointerSize));
// Check that the receiver isn't a smi.
__ tst(r0, Operand(kSmiTagMask));
__ b(eq, &miss);
// Do the right check and compute the holder register.
Register reg =
CheckPrototypes(JSObject::cast(object), r0, holder, r3, r2, name, &miss);
GenerateFastPropertyLoad(masm(), r1, reg, holder, index);
// Check that the function really is a function.
__ tst(r1, Operand(kSmiTagMask));
__ b(eq, &miss);
// Get the map.
__ CompareObjectType(r1, r2, r2, JS_FUNCTION_TYPE);
__ b(ne, &miss);
// Patch the receiver on the stack with the global proxy if
// necessary.
if (object->IsGlobalObject()) {
__ ldr(r3, FieldMemOperand(r0, GlobalObject::kGlobalReceiverOffset));
__ str(r3, MemOperand(sp, argc * kPointerSize));
}
// Invoke the function.
__ InvokeFunction(r1, arguments(), JUMP_FUNCTION);
// Handle call cache miss.
__ bind(&miss);
Handle<Code> ic = ComputeCallMiss(arguments().immediate());
__ Jump(ic, RelocInfo::CODE_TARGET);
// Return the generated code.
return GetCode(FIELD, name);
}
Object* CallStubCompiler::CompileCallConstant(Object* object,
JSObject* holder,
JSFunction* function,
String* name,
CheckType check) {
// ----------- S t a t e -------------
// -- lr: return address
// -----------------------------------
Label miss;
// Get the receiver from the stack
const int argc = arguments().immediate();
__ ldr(r1, MemOperand(sp, argc * kPointerSize));
// Check that the receiver isn't a smi.
if (check != NUMBER_CHECK) {
__ tst(r1, Operand(kSmiTagMask));
__ b(eq, &miss);
}
// Make sure that it's okay not to patch the on stack receiver
// unless we're doing a receiver map check.
ASSERT(!object->IsGlobalObject() || check == RECEIVER_MAP_CHECK);
switch (check) {
case RECEIVER_MAP_CHECK:
// Check that the maps haven't changed.
CheckPrototypes(JSObject::cast(object), r1, holder, r3, r2, name, &miss);
// Patch the receiver on the stack with the global proxy if
// necessary.
if (object->IsGlobalObject()) {
__ ldr(r3, FieldMemOperand(r1, GlobalObject::kGlobalReceiverOffset));
__ str(r3, MemOperand(sp, argc * kPointerSize));
}
break;
case STRING_CHECK:
// Check that the object is a two-byte string or a symbol.
__ CompareObjectType(r1, r2, r2, FIRST_NONSTRING_TYPE);
__ b(hs, &miss);
// Check that the maps starting from the prototype haven't changed.
GenerateLoadGlobalFunctionPrototype(masm(),
Context::STRING_FUNCTION_INDEX,
r2);
CheckPrototypes(JSObject::cast(object->GetPrototype()), r2, holder, r3,
r1, name, &miss);
break;
case NUMBER_CHECK: {
Label fast;
// Check that the object is a smi or a heap number.
__ tst(r1, Operand(kSmiTagMask));
__ b(eq, &fast);
__ CompareObjectType(r1, r2, r2, HEAP_NUMBER_TYPE);
__ b(ne, &miss);
__ bind(&fast);
// Check that the maps starting from the prototype haven't changed.
GenerateLoadGlobalFunctionPrototype(masm(),
Context::NUMBER_FUNCTION_INDEX,
r2);
CheckPrototypes(JSObject::cast(object->GetPrototype()), r2, holder, r3,
r1, name, &miss);
break;
}
case BOOLEAN_CHECK: {
Label fast;
// Check that the object is a boolean.
__ LoadRoot(ip, Heap::kTrueValueRootIndex);
__ cmp(r1, ip);
__ b(eq, &fast);
__ LoadRoot(ip, Heap::kFalseValueRootIndex);
__ cmp(r1, ip);
__ b(ne, &miss);
__ bind(&fast);
// Check that the maps starting from the prototype haven't changed.
GenerateLoadGlobalFunctionPrototype(masm(),
Context::BOOLEAN_FUNCTION_INDEX,
r2);
CheckPrototypes(JSObject::cast(object->GetPrototype()), r2, holder, r3,
r1, name, &miss);
break;
}
case JSARRAY_HAS_FAST_ELEMENTS_CHECK:
CheckPrototypes(JSObject::cast(object), r1, holder, r3, r2, name, &miss);
// Make sure object->HasFastElements().
// Get the elements array of the object.
__ ldr(r3, FieldMemOperand(r1, JSObject::kElementsOffset));
// Check that the object is in fast mode (not dictionary).
__ ldr(r2, FieldMemOperand(r3, HeapObject::kMapOffset));
__ LoadRoot(ip, Heap::kFixedArrayMapRootIndex);
__ cmp(r2, ip);
__ b(ne, &miss);
break;
default:
UNREACHABLE();
}
// Get the function and setup the context.
__ mov(r1, Operand(Handle<JSFunction>(function)));
__ ldr(cp, FieldMemOperand(r1, JSFunction::kContextOffset));
// Jump to the cached code (tail call).
ASSERT(function->is_compiled());
Handle<Code> code(function->code());
ParameterCount expected(function->shared()->formal_parameter_count());
__ InvokeCode(code, expected, arguments(),
RelocInfo::CODE_TARGET, JUMP_FUNCTION);
// Handle call cache miss.
__ bind(&miss);
Handle<Code> ic = ComputeCallMiss(arguments().immediate());
__ Jump(ic, RelocInfo::CODE_TARGET);
// Return the generated code.
String* function_name = NULL;
if (function->shared()->name()->IsString()) {
function_name = String::cast(function->shared()->name());
}
return GetCode(CONSTANT_FUNCTION, function_name);
}
Object* CallStubCompiler::CompileCallInterceptor(Object* object,
JSObject* holder,
String* name) {
// ----------- S t a t e -------------
// -- lr: return address
// -----------------------------------
Label miss;
// TODO(1224669): Implement.
// Handle call cache miss.
__ bind(&miss);
Handle<Code> ic = ComputeCallMiss(arguments().immediate());
__ Jump(ic, RelocInfo::CODE_TARGET);
// Return the generated code.
return GetCode(INTERCEPTOR, name);
}
Object* CallStubCompiler::CompileCallGlobal(JSObject* object,
GlobalObject* holder,
JSGlobalPropertyCell* cell,
JSFunction* function,
String* name) {
// ----------- S t a t e -------------
// -- lr: return address
// -----------------------------------
Label miss;
// Get the number of arguments.
const int argc = arguments().immediate();
// Get the receiver from the stack.
__ ldr(r0, MemOperand(sp, argc * kPointerSize));
// If the object is the holder then we know that it's a global
// object which can only happen for contextual calls. In this case,
// the receiver cannot be a smi.
if (object != holder) {
__ tst(r0, Operand(kSmiTagMask));
__ b(eq, &miss);
}
// Check that the maps haven't changed.
CheckPrototypes(object, r0, holder, r3, r2, name, &miss);
// Get the value from the cell.
__ mov(r3, Operand(Handle<JSGlobalPropertyCell>(cell)));
__ ldr(r1, FieldMemOperand(r3, JSGlobalPropertyCell::kValueOffset));
// Check that the cell contains the same function.
__ cmp(r1, Operand(Handle<JSFunction>(function)));
__ b(ne, &miss);
// Patch the receiver on the stack with the global proxy if
// necessary.
if (object->IsGlobalObject()) {
__ ldr(r3, FieldMemOperand(r0, GlobalObject::kGlobalReceiverOffset));
__ str(r3, MemOperand(sp, argc * kPointerSize));
}
// Setup the context (function already in r1).
__ ldr(cp, FieldMemOperand(r1, JSFunction::kContextOffset));
// Jump to the cached code (tail call).
__ IncrementCounter(&Counters::call_global_inline, 1, r2, r3);
ASSERT(function->is_compiled());
Handle<Code> code(function->code());
ParameterCount expected(function->shared()->formal_parameter_count());
__ InvokeCode(code, expected, arguments(),
RelocInfo::CODE_TARGET, JUMP_FUNCTION);
// Handle call cache miss.
__ bind(&miss);
__ IncrementCounter(&Counters::call_global_inline_miss, 1, r1, r3);
Handle<Code> ic = ComputeCallMiss(arguments().immediate());
__ Jump(ic, RelocInfo::CODE_TARGET);
// Return the generated code.
return GetCode(NORMAL, name);
}
Object* StoreStubCompiler::CompileStoreField(JSObject* object,
int index,
Map* transition,
String* name) {
// ----------- S t a t e -------------
// -- r0 : value
// -- r2 : name
// -- lr : return address
// -- [sp] : receiver
// -----------------------------------
Label miss;
// Get the receiver from the stack.
__ ldr(r3, MemOperand(sp, 0 * kPointerSize));
// name register might be clobbered.
GenerateStoreField(masm(),
Builtins::StoreIC_ExtendStorage,
object,
index,
transition,
r3, r2, r1,
&miss);
__ bind(&miss);
__ mov(r2, Operand(Handle<String>(name))); // restore name
Handle<Code> ic(Builtins::builtin(Builtins::StoreIC_Miss));
__ Jump(ic, RelocInfo::CODE_TARGET);
// Return the generated code.
return GetCode(transition == NULL ? FIELD : MAP_TRANSITION, name);
}
Object* StoreStubCompiler::CompileStoreCallback(JSObject* object,
AccessorInfo* callback,
String* name) {
// ----------- S t a t e -------------
// -- r0 : value
// -- r2 : name
// -- lr : return address
// -- [sp] : receiver
// -----------------------------------
Label miss;
// Get the object from the stack.
__ ldr(r3, MemOperand(sp, 0 * kPointerSize));
// Check that the object isn't a smi.
__ tst(r3, Operand(kSmiTagMask));
__ b(eq, &miss);
// Check that the map of the object hasn't changed.
__ ldr(r1, FieldMemOperand(r3, HeapObject::kMapOffset));
__ cmp(r1, Operand(Handle<Map>(object->map())));
__ b(ne, &miss);
// Perform global security token check if needed.
if (object->IsJSGlobalProxy()) {
__ CheckAccessGlobalProxy(r3, r1, &miss);
}
// Stub never generated for non-global objects that require access
// checks.
ASSERT(object->IsJSGlobalProxy() || !object->IsAccessCheckNeeded());
__ ldr(ip, MemOperand(sp)); // receiver
__ push(ip);
__ mov(ip, Operand(Handle<AccessorInfo>(callback))); // callback info
__ push(ip);
__ push(r2); // name
__ push(r0); // value
// Do tail-call to the runtime system.
ExternalReference store_callback_property =
ExternalReference(IC_Utility(IC::kStoreCallbackProperty));
__ TailCallRuntime(store_callback_property, 4);
// Handle store cache miss.
__ bind(&miss);
__ mov(r2, Operand(Handle<String>(name))); // restore name
Handle<Code> ic(Builtins::builtin(Builtins::StoreIC_Miss));
__ Jump(ic, RelocInfo::CODE_TARGET);
// Return the generated code.
return GetCode(CALLBACKS, name);
}
Object* StoreStubCompiler::CompileStoreInterceptor(JSObject* receiver,
String* name) {
// ----------- S t a t e -------------
// -- r0 : value
// -- r2 : name
// -- lr : return address
// -- [sp] : receiver
// -----------------------------------
Label miss;
// Get the object from the stack.
__ ldr(r3, MemOperand(sp, 0 * kPointerSize));
// Check that the object isn't a smi.
__ tst(r3, Operand(kSmiTagMask));
__ b(eq, &miss);
// Check that the map of the object hasn't changed.
__ ldr(r1, FieldMemOperand(r3, HeapObject::kMapOffset));
__ cmp(r1, Operand(Handle<Map>(receiver->map())));
__ b(ne, &miss);
// Perform global security token check if needed.
if (receiver->IsJSGlobalProxy()) {
__ CheckAccessGlobalProxy(r3, r1, &miss);
}
// Stub never generated for non-global objects that require access
// checks.
ASSERT(receiver->IsJSGlobalProxy() || !receiver->IsAccessCheckNeeded());
__ ldr(ip, MemOperand(sp)); // receiver
__ push(ip);
__ push(r2); // name
__ push(r0); // value
// Do tail-call to the runtime system.
ExternalReference store_ic_property =
ExternalReference(IC_Utility(IC::kStoreInterceptorProperty));
__ TailCallRuntime(store_ic_property, 3);
// Handle store cache miss.
__ bind(&miss);
__ mov(r2, Operand(Handle<String>(name))); // restore name
Handle<Code> ic(Builtins::builtin(Builtins::StoreIC_Miss));
__ Jump(ic, RelocInfo::CODE_TARGET);
// Return the generated code.
return GetCode(INTERCEPTOR, name);
}
Object* StoreStubCompiler::CompileStoreGlobal(GlobalObject* object,
JSGlobalPropertyCell* cell,
String* name) {
// ----------- S t a t e -------------
// -- r0 : value
// -- r2 : name
// -- lr : return address
// -- [sp] : receiver
// -----------------------------------
Label miss;
// Check that the map of the global has not changed.
__ ldr(r1, MemOperand(sp, 0 * kPointerSize));
__ ldr(r3, FieldMemOperand(r1, HeapObject::kMapOffset));
__ cmp(r3, Operand(Handle<Map>(object->map())));
__ b(ne, &miss);
// Store the value in the cell.
__ mov(r2, Operand(Handle<JSGlobalPropertyCell>(cell)));
__ str(r0, FieldMemOperand(r2, JSGlobalPropertyCell::kValueOffset));
__ IncrementCounter(&Counters::named_store_global_inline, 1, r1, r3);
__ Ret();
// Handle store cache miss.
__ bind(&miss);
__ IncrementCounter(&Counters::named_store_global_inline_miss, 1, r1, r3);
Handle<Code> ic(Builtins::builtin(Builtins::StoreIC_Miss));
__ Jump(ic, RelocInfo::CODE_TARGET);
// Return the generated code.
return GetCode(NORMAL, name);
}
Object* LoadStubCompiler::CompileLoadField(JSObject* object,
JSObject* holder,
int index,
String* name) {
// ----------- S t a t e -------------
// -- r2 : name
// -- lr : return address
// -- [sp] : receiver
// -----------------------------------
Label miss;
__ ldr(r0, MemOperand(sp, 0));
GenerateLoadField(object, holder, r0, r3, r1, index, name, &miss);
__ bind(&miss);
GenerateLoadMiss(masm(), Code::LOAD_IC);
// Return the generated code.
return GetCode(FIELD, name);
}
Object* LoadStubCompiler::CompileLoadCallback(JSObject* object,
JSObject* holder,
AccessorInfo* callback,
String* name) {
// ----------- S t a t e -------------
// -- r2 : name
// -- lr : return address
// -- [sp] : receiver
// -----------------------------------
Label miss;
__ ldr(r0, MemOperand(sp, 0));
GenerateLoadCallback(object, holder, r0, r2, r3, r1, callback, name, &miss);
__ bind(&miss);
GenerateLoadMiss(masm(), Code::LOAD_IC);
// Return the generated code.
return GetCode(CALLBACKS, name);
}
Object* LoadStubCompiler::CompileLoadConstant(JSObject* object,
JSObject* holder,
Object* value,
String* name) {
// ----------- S t a t e -------------
// -- r2 : name
// -- lr : return address
// -- [sp] : receiver
// -----------------------------------
Label miss;
__ ldr(r0, MemOperand(sp, 0));
GenerateLoadConstant(object, holder, r0, r3, r1, value, name, &miss);
__ bind(&miss);
GenerateLoadMiss(masm(), Code::LOAD_IC);
// Return the generated code.
return GetCode(CONSTANT_FUNCTION, name);
}
Object* LoadStubCompiler::CompileLoadInterceptor(JSObject* object,
JSObject* holder,
String* name) {
// ----------- S t a t e -------------
// -- r2 : name
// -- lr : return address
// -- [sp] : receiver
// -----------------------------------
Label miss;
__ ldr(r0, MemOperand(sp, 0));
LookupResult lookup;
holder->LocalLookupRealNamedProperty(name, &lookup);
GenerateLoadInterceptor(object,
holder,
&lookup,
r0,
r2,
r3,
r1,
name,
&miss);
__ bind(&miss);
GenerateLoadMiss(masm(), Code::LOAD_IC);
// Return the generated code.
return GetCode(INTERCEPTOR, name);
}
Object* LoadStubCompiler::CompileLoadGlobal(JSObject* object,
GlobalObject* holder,
JSGlobalPropertyCell* cell,
String* name,
bool is_dont_delete) {
// ----------- S t a t e -------------
// -- r2 : name
// -- lr : return address
// -- [sp] : receiver
// -----------------------------------
Label miss;
// Get the receiver from the stack.
__ ldr(r1, MemOperand(sp, 0 * kPointerSize));
// If the object is the holder then we know that it's a global
// object which can only happen for contextual calls. In this case,
// the receiver cannot be a smi.
if (object != holder) {
__ tst(r1, Operand(kSmiTagMask));
__ b(eq, &miss);
}
// Check that the map of the global has not changed.
CheckPrototypes(object, r1, holder, r3, r0, name, &miss);
// Get the value from the cell.
__ mov(r3, Operand(Handle<JSGlobalPropertyCell>(cell)));
__ ldr(r0, FieldMemOperand(r3, JSGlobalPropertyCell::kValueOffset));
// Check for deleted property if property can actually be deleted.
if (!is_dont_delete) {
__ LoadRoot(ip, Heap::kTheHoleValueRootIndex);
__ cmp(r0, ip);
__ b(eq, &miss);
}
__ IncrementCounter(&Counters::named_load_global_inline, 1, r1, r3);
__ Ret();
__ bind(&miss);
__ IncrementCounter(&Counters::named_load_global_inline_miss, 1, r1, r3);
GenerateLoadMiss(masm(), Code::LOAD_IC);
// Return the generated code.
return GetCode(NORMAL, name);
}
Object* KeyedLoadStubCompiler::CompileLoadField(String* name,
JSObject* receiver,
JSObject* holder,
int index) {
// ----------- S t a t e -------------
// -- lr : return address
// -- sp[0] : key
// -- sp[4] : receiver
// -----------------------------------
Label miss;
__ ldr(r2, MemOperand(sp, 0));
__ ldr(r0, MemOperand(sp, kPointerSize));
__ cmp(r2, Operand(Handle<String>(name)));
__ b(ne, &miss);
GenerateLoadField(receiver, holder, r0, r3, r1, index, name, &miss);
__ bind(&miss);
GenerateLoadMiss(masm(), Code::KEYED_LOAD_IC);
return GetCode(FIELD, name);
}
Object* KeyedLoadStubCompiler::CompileLoadCallback(String* name,
JSObject* receiver,
JSObject* holder,
AccessorInfo* callback) {
// ----------- S t a t e -------------
// -- lr : return address
// -- sp[0] : key
// -- sp[4] : receiver
// -----------------------------------
Label miss;
__ ldr(r2, MemOperand(sp, 0));
__ ldr(r0, MemOperand(sp, kPointerSize));
__ cmp(r2, Operand(Handle<String>(name)));
__ b(ne, &miss);
GenerateLoadCallback(receiver, holder, r0, r2, r3, r1, callback, name, &miss);
__ bind(&miss);
GenerateLoadMiss(masm(), Code::KEYED_LOAD_IC);
return GetCode(CALLBACKS, name);
}
Object* KeyedLoadStubCompiler::CompileLoadConstant(String* name,
JSObject* receiver,
JSObject* holder,
Object* value) {
// ----------- S t a t e -------------
// -- lr : return address
// -- sp[0] : key
// -- sp[4] : receiver
// -----------------------------------
Label miss;
// Check the key is the cached one
__ ldr(r2, MemOperand(sp, 0));
__ ldr(r0, MemOperand(sp, kPointerSize));
__ cmp(r2, Operand(Handle<String>(name)));
__ b(ne, &miss);
GenerateLoadConstant(receiver, holder, r0, r3, r1, value, name, &miss);
__ bind(&miss);
GenerateLoadMiss(masm(), Code::KEYED_LOAD_IC);
// Return the generated code.
return GetCode(CONSTANT_FUNCTION, name);
}
Object* KeyedLoadStubCompiler::CompileLoadInterceptor(JSObject* receiver,
JSObject* holder,
String* name) {
// ----------- S t a t e -------------
// -- lr : return address
// -- sp[0] : key
// -- sp[4] : receiver
// -----------------------------------
Label miss;
// Check the key is the cached one
__ ldr(r2, MemOperand(sp, 0));
__ ldr(r0, MemOperand(sp, kPointerSize));
__ cmp(r2, Operand(Handle<String>(name)));
__ b(ne, &miss);
LookupResult lookup;
holder->LocalLookupRealNamedProperty(name, &lookup);
GenerateLoadInterceptor(receiver,
holder,
&lookup,
r0,
r2,
r3,
r1,
name,
&miss);
__ bind(&miss);
GenerateLoadMiss(masm(), Code::KEYED_LOAD_IC);
return GetCode(INTERCEPTOR, name);
}
Object* KeyedLoadStubCompiler::CompileLoadArrayLength(String* name) {
// ----------- S t a t e -------------
// -- lr : return address
// -- sp[0] : key
// -- sp[4] : receiver
// -----------------------------------
Label miss;
// Check the key is the cached one
__ ldr(r2, MemOperand(sp, 0));
__ ldr(r0, MemOperand(sp, kPointerSize));
__ cmp(r2, Operand(Handle<String>(name)));
__ b(ne, &miss);
GenerateLoadArrayLength(masm(), r0, r3, &miss);
__ bind(&miss);
GenerateLoadMiss(masm(), Code::KEYED_LOAD_IC);
return GetCode(CALLBACKS, name);
}
Object* KeyedLoadStubCompiler::CompileLoadStringLength(String* name) {
// ----------- S t a t e -------------
// -- lr : return address
// -- sp[0] : key
// -- sp[4] : receiver
// -----------------------------------
Label miss;
__ IncrementCounter(&Counters::keyed_load_string_length, 1, r1, r3);
__ ldr(r2, MemOperand(sp));
__ ldr(r0, MemOperand(sp, kPointerSize)); // receiver
__ cmp(r2, Operand(Handle<String>(name)));
__ b(ne, &miss);
GenerateLoadStringLength2(masm(), r0, r1, r3, &miss);
__ bind(&miss);
__ DecrementCounter(&Counters::keyed_load_string_length, 1, r1, r3);
GenerateLoadMiss(masm(), Code::KEYED_LOAD_IC);
return GetCode(CALLBACKS, name);
}
// TODO(1224671): implement the fast case.
Object* KeyedLoadStubCompiler::CompileLoadFunctionPrototype(String* name) {
// ----------- S t a t e -------------
// -- lr : return address
// -- sp[0] : key
// -- sp[4] : receiver
// -----------------------------------
GenerateLoadMiss(masm(), Code::KEYED_LOAD_IC);
return GetCode(CALLBACKS, name);
}
Object* KeyedStoreStubCompiler::CompileStoreField(JSObject* object,
int index,
Map* transition,
String* name) {
// ----------- S t a t e -------------
// -- r0 : value
// -- r2 : name
// -- lr : return address
// -- [sp] : receiver
// -----------------------------------
Label miss;
__ IncrementCounter(&Counters::keyed_store_field, 1, r1, r3);
// Check that the name has not changed.
__ cmp(r2, Operand(Handle<String>(name)));
__ b(ne, &miss);
// Load receiver from the stack.
__ ldr(r3, MemOperand(sp));
// r1 is used as scratch register, r3 and r2 might be clobbered.
GenerateStoreField(masm(),
Builtins::StoreIC_ExtendStorage,
object,
index,
transition,
r3, r2, r1,
&miss);
__ bind(&miss);
__ DecrementCounter(&Counters::keyed_store_field, 1, r1, r3);
__ mov(r2, Operand(Handle<String>(name))); // restore name register.
Handle<Code> ic(Builtins::builtin(Builtins::KeyedStoreIC_Miss));
__ Jump(ic, RelocInfo::CODE_TARGET);
// Return the generated code.
return GetCode(transition == NULL ? FIELD : MAP_TRANSITION, name);
}
Object* ConstructStubCompiler::CompileConstructStub(
SharedFunctionInfo* shared) {
// ----------- S t a t e -------------
// -- r0 : argc
// -- r1 : constructor
// -- lr : return address
// -- [sp] : last argument
// -----------------------------------
Label generic_stub_call;
// Use r7 for holding undefined which is used in several places below.
__ LoadRoot(r7, Heap::kUndefinedValueRootIndex);
#ifdef ENABLE_DEBUGGER_SUPPORT
// Check to see whether there are any break points in the function code. If
// there are jump to the generic constructor stub which calls the actual
// code for the function thereby hitting the break points.
__ ldr(r2, FieldMemOperand(r1, JSFunction::kSharedFunctionInfoOffset));
__ ldr(r2, FieldMemOperand(r2, SharedFunctionInfo::kDebugInfoOffset));
__ cmp(r2, r7);
__ b(ne, &generic_stub_call);
#endif
// Load the initial map and verify that it is in fact a map.
// r1: constructor function
// r7: undefined
__ ldr(r2, FieldMemOperand(r1, JSFunction::kPrototypeOrInitialMapOffset));
__ tst(r2, Operand(kSmiTagMask));
__ b(eq, &generic_stub_call);
__ CompareObjectType(r2, r3, r4, MAP_TYPE);
__ b(ne, &generic_stub_call);
#ifdef DEBUG
// Cannot construct functions this way.
// r0: argc
// r1: constructor function
// r2: initial map
// r7: undefined
__ CompareInstanceType(r2, r3, JS_FUNCTION_TYPE);
__ Check(ne, "Function constructed by construct stub.");
#endif
// Now allocate the JSObject in new space.
// r0: argc
// r1: constructor function
// r2: initial map
// r7: undefined
__ ldrb(r3, FieldMemOperand(r2, Map::kInstanceSizeOffset));
__ AllocateObjectInNewSpace(r3,
r4,
r5,
r6,
&generic_stub_call,
NO_ALLOCATION_FLAGS);
// Allocated the JSObject, now initialize the fields. Map is set to initial
// map and properties and elements are set to empty fixed array.
// r0: argc
// r1: constructor function
// r2: initial map
// r3: object size (in words)
// r4: JSObject (not tagged)
// r7: undefined
__ LoadRoot(r6, Heap::kEmptyFixedArrayRootIndex);
__ mov(r5, r4);
ASSERT_EQ(0 * kPointerSize, JSObject::kMapOffset);
__ str(r2, MemOperand(r5, kPointerSize, PostIndex));
ASSERT_EQ(1 * kPointerSize, JSObject::kPropertiesOffset);
__ str(r6, MemOperand(r5, kPointerSize, PostIndex));
ASSERT_EQ(2 * kPointerSize, JSObject::kElementsOffset);
__ str(r6, MemOperand(r5, kPointerSize, PostIndex));
// Calculate the location of the first argument. The stack contains only the
// argc arguments.
__ add(r1, sp, Operand(r0, LSL, kPointerSizeLog2));
// Fill all the in-object properties with undefined.
// r0: argc
// r1: first argument
// r3: object size (in words)
// r4: JSObject (not tagged)
// r5: First in-object property of JSObject (not tagged)
// r7: undefined
// Fill the initialized properties with a constant value or a passed argument
// depending on the this.x = ...; assignment in the function.
for (int i = 0; i < shared->this_property_assignments_count(); i++) {
if (shared->IsThisPropertyAssignmentArgument(i)) {
Label not_passed, next;
// Check if the argument assigned to the property is actually passed.
int arg_number = shared->GetThisPropertyAssignmentArgument(i);
__ cmp(r0, Operand(arg_number));
__ b(le, ¬_passed);
// Argument passed - find it on the stack.
__ ldr(r2, MemOperand(r1, (arg_number + 1) * -kPointerSize));
__ str(r2, MemOperand(r5, kPointerSize, PostIndex));
__ b(&next);
__ bind(¬_passed);
// Set the property to undefined.
__ str(r7, MemOperand(r5, kPointerSize, PostIndex));
__ bind(&next);
} else {
// Set the property to the constant value.
Handle<Object> constant(shared->GetThisPropertyAssignmentConstant(i));
__ mov(r2, Operand(constant));
__ str(r2, MemOperand(r5, kPointerSize, PostIndex));
}
}
// Fill the unused in-object property fields with undefined.
for (int i = shared->this_property_assignments_count();
i < shared->CalculateInObjectProperties();
i++) {
__ str(r7, MemOperand(r5, kPointerSize, PostIndex));
}
// r0: argc
// r4: JSObject (not tagged)
// Move argc to r1 and the JSObject to return to r0 and tag it.
__ mov(r1, r0);
__ mov(r0, r4);
__ orr(r0, r0, Operand(kHeapObjectTag));
// r0: JSObject
// r1: argc
// Remove caller arguments and receiver from the stack and return.
__ add(sp, sp, Operand(r1, LSL, kPointerSizeLog2));
__ add(sp, sp, Operand(kPointerSize));
__ IncrementCounter(&Counters::constructed_objects, 1, r1, r2);
__ IncrementCounter(&Counters::constructed_objects_stub, 1, r1, r2);
__ Jump(lr);
// Jump to the generic stub in case the specialized code cannot handle the
// construction.
__ bind(&generic_stub_call);
Code* code = Builtins::builtin(Builtins::JSConstructStubGeneric);
Handle<Code> generic_construct_stub(code);
__ Jump(generic_construct_stub, RelocInfo::CODE_TARGET);
// Return the generated code.
return GetCode();
}
#undef __
} } // namespace v8::internal