| // Copyright 2012 the V8 project authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #if V8_TARGET_ARCH_ARM |
| |
| #include "src/codegen.h" |
| #include "src/debug/debug.h" |
| #include "src/deoptimizer.h" |
| #include "src/full-codegen/full-codegen.h" |
| #include "src/runtime/runtime.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| #define __ ACCESS_MASM(masm) |
| |
| void Builtins::Generate_Adaptor(MacroAssembler* masm, Address address, |
| ExitFrameType exit_frame_type) { |
| // ----------- S t a t e ------------- |
| // -- r0 : number of arguments excluding receiver |
| // -- r1 : target |
| // -- r3 : new.target |
| // -- sp[0] : last argument |
| // -- ... |
| // -- sp[4 * (argc - 1)] : first argument |
| // -- sp[4 * argc] : receiver |
| // ----------------------------------- |
| __ AssertFunction(r1); |
| |
| // Make sure we operate in the context of the called function (for example |
| // ConstructStubs implemented in C++ will be run in the context of the caller |
| // instead of the callee, due to the way that [[Construct]] is defined for |
| // ordinary functions). |
| __ ldr(cp, FieldMemOperand(r1, JSFunction::kContextOffset)); |
| |
| // JumpToExternalReference expects r0 to contain the number of arguments |
| // including the receiver and the extra arguments. |
| const int num_extra_args = 3; |
| __ add(r0, r0, Operand(num_extra_args + 1)); |
| |
| // Insert extra arguments. |
| __ SmiTag(r0); |
| __ Push(r0, r1, r3); |
| __ SmiUntag(r0); |
| |
| __ JumpToExternalReference(ExternalReference(address, masm->isolate()), |
| exit_frame_type == BUILTIN_EXIT); |
| } |
| |
| // Load the built-in InternalArray function from the current context. |
| static void GenerateLoadInternalArrayFunction(MacroAssembler* masm, |
| Register result) { |
| // Load the InternalArray function from the current native context. |
| __ LoadNativeContextSlot(Context::INTERNAL_ARRAY_FUNCTION_INDEX, result); |
| } |
| |
| // Load the built-in Array function from the current context. |
| static void GenerateLoadArrayFunction(MacroAssembler* masm, Register result) { |
| // Load the Array function from the current native context. |
| __ LoadNativeContextSlot(Context::ARRAY_FUNCTION_INDEX, result); |
| } |
| |
| void Builtins::Generate_InternalArrayCode(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- r0 : number of arguments |
| // -- lr : return address |
| // -- sp[...]: constructor arguments |
| // ----------------------------------- |
| Label generic_array_code, one_or_more_arguments, two_or_more_arguments; |
| |
| // Get the InternalArray function. |
| GenerateLoadInternalArrayFunction(masm, r1); |
| |
| if (FLAG_debug_code) { |
| // Initial map for the builtin InternalArray functions should be maps. |
| __ ldr(r2, FieldMemOperand(r1, JSFunction::kPrototypeOrInitialMapOffset)); |
| __ SmiTst(r2); |
| __ Assert(ne, kUnexpectedInitialMapForInternalArrayFunction); |
| __ CompareObjectType(r2, r3, r4, MAP_TYPE); |
| __ Assert(eq, kUnexpectedInitialMapForInternalArrayFunction); |
| } |
| |
| // Run the native code for the InternalArray function called as a normal |
| // function. |
| // tail call a stub |
| InternalArrayConstructorStub stub(masm->isolate()); |
| __ TailCallStub(&stub); |
| } |
| |
| void Builtins::Generate_ArrayCode(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- r0 : number of arguments |
| // -- lr : return address |
| // -- sp[...]: constructor arguments |
| // ----------------------------------- |
| Label generic_array_code, one_or_more_arguments, two_or_more_arguments; |
| |
| // Get the Array function. |
| GenerateLoadArrayFunction(masm, r1); |
| |
| if (FLAG_debug_code) { |
| // Initial map for the builtin Array functions should be maps. |
| __ ldr(r2, FieldMemOperand(r1, JSFunction::kPrototypeOrInitialMapOffset)); |
| __ SmiTst(r2); |
| __ Assert(ne, kUnexpectedInitialMapForArrayFunction); |
| __ CompareObjectType(r2, r3, r4, MAP_TYPE); |
| __ Assert(eq, kUnexpectedInitialMapForArrayFunction); |
| } |
| |
| __ mov(r3, r1); |
| // Run the native code for the Array function called as a normal function. |
| // tail call a stub |
| __ LoadRoot(r2, Heap::kUndefinedValueRootIndex); |
| ArrayConstructorStub stub(masm->isolate()); |
| __ TailCallStub(&stub); |
| } |
| |
| // static |
| void Builtins::Generate_MathMaxMin(MacroAssembler* masm, MathMaxMinKind kind) { |
| // ----------- S t a t e ------------- |
| // -- r0 : number of arguments |
| // -- r1 : function |
| // -- cp : context |
| // -- lr : return address |
| // -- sp[(argc - n - 1) * 4] : arg[n] (zero based) |
| // -- sp[argc * 4] : receiver |
| // ----------------------------------- |
| Condition const cc_done = (kind == MathMaxMinKind::kMin) ? mi : gt; |
| Condition const cc_swap = (kind == MathMaxMinKind::kMin) ? gt : mi; |
| Heap::RootListIndex const root_index = |
| (kind == MathMaxMinKind::kMin) ? Heap::kInfinityValueRootIndex |
| : Heap::kMinusInfinityValueRootIndex; |
| DoubleRegister const reg = (kind == MathMaxMinKind::kMin) ? d2 : d1; |
| |
| // Load the accumulator with the default return value (either -Infinity or |
| // +Infinity), with the tagged value in r5 and the double value in d1. |
| __ LoadRoot(r5, root_index); |
| __ vldr(d1, FieldMemOperand(r5, HeapNumber::kValueOffset)); |
| |
| Label done_loop, loop; |
| __ mov(r4, r0); |
| __ bind(&loop); |
| { |
| // Check if all parameters done. |
| __ sub(r4, r4, Operand(1), SetCC); |
| __ b(lt, &done_loop); |
| |
| // Load the next parameter tagged value into r2. |
| __ ldr(r2, MemOperand(sp, r4, LSL, kPointerSizeLog2)); |
| |
| // Load the double value of the parameter into d2, maybe converting the |
| // parameter to a number first using the ToNumber builtin if necessary. |
| Label convert, convert_smi, convert_number, done_convert; |
| __ bind(&convert); |
| __ JumpIfSmi(r2, &convert_smi); |
| __ ldr(r3, FieldMemOperand(r2, HeapObject::kMapOffset)); |
| __ JumpIfRoot(r3, Heap::kHeapNumberMapRootIndex, &convert_number); |
| { |
| // Parameter is not a Number, use the ToNumber builtin to convert it. |
| DCHECK(!FLAG_enable_embedded_constant_pool); |
| FrameScope scope(masm, StackFrame::MANUAL); |
| __ SmiTag(r0); |
| __ SmiTag(r4); |
| __ EnterBuiltinFrame(cp, r1, r0); |
| __ Push(r4, r5); |
| __ mov(r0, r2); |
| __ Call(masm->isolate()->builtins()->ToNumber(), RelocInfo::CODE_TARGET); |
| __ mov(r2, r0); |
| __ Pop(r4, r5); |
| __ LeaveBuiltinFrame(cp, r1, r0); |
| __ SmiUntag(r4); |
| __ SmiUntag(r0); |
| { |
| // Restore the double accumulator value (d1). |
| Label done_restore; |
| __ SmiToDouble(d1, r5); |
| __ JumpIfSmi(r5, &done_restore); |
| __ vldr(d1, FieldMemOperand(r5, HeapNumber::kValueOffset)); |
| __ bind(&done_restore); |
| } |
| } |
| __ b(&convert); |
| __ bind(&convert_number); |
| __ vldr(d2, FieldMemOperand(r2, HeapNumber::kValueOffset)); |
| __ b(&done_convert); |
| __ bind(&convert_smi); |
| __ SmiToDouble(d2, r2); |
| __ bind(&done_convert); |
| |
| // Perform the actual comparison with the accumulator value on the left hand |
| // side (d1) and the next parameter value on the right hand side (d2). |
| Label compare_nan, compare_swap; |
| __ VFPCompareAndSetFlags(d1, d2); |
| __ b(cc_done, &loop); |
| __ b(cc_swap, &compare_swap); |
| __ b(vs, &compare_nan); |
| |
| // Left and right hand side are equal, check for -0 vs. +0. |
| __ VmovHigh(ip, reg); |
| __ cmp(ip, Operand(0x80000000)); |
| __ b(ne, &loop); |
| |
| // Result is on the right hand side. |
| __ bind(&compare_swap); |
| __ vmov(d1, d2); |
| __ mov(r5, r2); |
| __ b(&loop); |
| |
| // At least one side is NaN, which means that the result will be NaN too. |
| __ bind(&compare_nan); |
| __ LoadRoot(r5, Heap::kNanValueRootIndex); |
| __ vldr(d1, FieldMemOperand(r5, HeapNumber::kValueOffset)); |
| __ b(&loop); |
| } |
| |
| __ bind(&done_loop); |
| // Drop all slots, including the receiver. |
| __ add(r0, r0, Operand(1)); |
| __ Drop(r0); |
| __ mov(r0, r5); |
| __ Ret(); |
| } |
| |
| // static |
| void Builtins::Generate_NumberConstructor(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- r0 : number of arguments |
| // -- r1 : constructor function |
| // -- cp : context |
| // -- lr : return address |
| // -- sp[(argc - n - 1) * 4] : arg[n] (zero based) |
| // -- sp[argc * 4] : receiver |
| // ----------------------------------- |
| |
| // 1. Load the first argument into r0. |
| Label no_arguments; |
| { |
| __ mov(r2, r0); // Store argc in r2. |
| __ sub(r0, r0, Operand(1), SetCC); |
| __ b(lo, &no_arguments); |
| __ ldr(r0, MemOperand(sp, r0, LSL, kPointerSizeLog2)); |
| } |
| |
| // 2a. Convert the first argument to a number. |
| { |
| FrameScope scope(masm, StackFrame::MANUAL); |
| __ SmiTag(r2); |
| __ EnterBuiltinFrame(cp, r1, r2); |
| __ Call(masm->isolate()->builtins()->ToNumber(), RelocInfo::CODE_TARGET); |
| __ LeaveBuiltinFrame(cp, r1, r2); |
| __ SmiUntag(r2); |
| } |
| |
| { |
| // Drop all arguments including the receiver. |
| __ Drop(r2); |
| __ Ret(1); |
| } |
| |
| // 2b. No arguments, return +0. |
| __ bind(&no_arguments); |
| __ Move(r0, Smi::kZero); |
| __ Ret(1); |
| } |
| |
| // static |
| void Builtins::Generate_NumberConstructor_ConstructStub(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- r0 : number of arguments |
| // -- r1 : constructor function |
| // -- r3 : new target |
| // -- cp : context |
| // -- lr : return address |
| // -- sp[(argc - n - 1) * 4] : arg[n] (zero based) |
| // -- sp[argc * 4] : receiver |
| // ----------------------------------- |
| |
| // 1. Make sure we operate in the context of the called function. |
| __ ldr(cp, FieldMemOperand(r1, JSFunction::kContextOffset)); |
| |
| // 2. Load the first argument into r2. |
| { |
| Label no_arguments, done; |
| __ mov(r6, r0); // Store argc in r6. |
| __ sub(r0, r0, Operand(1), SetCC); |
| __ b(lo, &no_arguments); |
| __ ldr(r2, MemOperand(sp, r0, LSL, kPointerSizeLog2)); |
| __ b(&done); |
| __ bind(&no_arguments); |
| __ Move(r2, Smi::kZero); |
| __ bind(&done); |
| } |
| |
| // 3. Make sure r2 is a number. |
| { |
| Label done_convert; |
| __ JumpIfSmi(r2, &done_convert); |
| __ CompareObjectType(r2, r4, r4, HEAP_NUMBER_TYPE); |
| __ b(eq, &done_convert); |
| { |
| FrameScope scope(masm, StackFrame::MANUAL); |
| __ SmiTag(r6); |
| __ EnterBuiltinFrame(cp, r1, r6); |
| __ Push(r3); |
| __ Move(r0, r2); |
| __ Call(masm->isolate()->builtins()->ToNumber(), RelocInfo::CODE_TARGET); |
| __ Move(r2, r0); |
| __ Pop(r3); |
| __ LeaveBuiltinFrame(cp, r1, r6); |
| __ SmiUntag(r6); |
| } |
| __ bind(&done_convert); |
| } |
| |
| // 4. Check if new target and constructor differ. |
| Label drop_frame_and_ret, new_object; |
| __ cmp(r1, r3); |
| __ b(ne, &new_object); |
| |
| // 5. Allocate a JSValue wrapper for the number. |
| __ AllocateJSValue(r0, r1, r2, r4, r5, &new_object); |
| __ b(&drop_frame_and_ret); |
| |
| // 6. Fallback to the runtime to create new object. |
| __ bind(&new_object); |
| { |
| FrameScope scope(masm, StackFrame::MANUAL); |
| FastNewObjectStub stub(masm->isolate()); |
| __ SmiTag(r6); |
| __ EnterBuiltinFrame(cp, r1, r6); |
| __ Push(r2); // first argument |
| __ CallStub(&stub); |
| __ Pop(r2); |
| __ LeaveBuiltinFrame(cp, r1, r6); |
| __ SmiUntag(r6); |
| } |
| __ str(r2, FieldMemOperand(r0, JSValue::kValueOffset)); |
| |
| __ bind(&drop_frame_and_ret); |
| { |
| __ Drop(r6); |
| __ Ret(1); |
| } |
| } |
| |
| // static |
| void Builtins::Generate_StringConstructor(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- r0 : number of arguments |
| // -- r1 : constructor function |
| // -- cp : context |
| // -- lr : return address |
| // -- sp[(argc - n - 1) * 4] : arg[n] (zero based) |
| // -- sp[argc * 4] : receiver |
| // ----------------------------------- |
| |
| // 1. Load the first argument into r0. |
| Label no_arguments; |
| { |
| __ mov(r2, r0); // Store argc in r2. |
| __ sub(r0, r0, Operand(1), SetCC); |
| __ b(lo, &no_arguments); |
| __ ldr(r0, MemOperand(sp, r0, LSL, kPointerSizeLog2)); |
| } |
| |
| // 2a. At least one argument, return r0 if it's a string, otherwise |
| // dispatch to appropriate conversion. |
| Label drop_frame_and_ret, to_string, symbol_descriptive_string; |
| { |
| __ JumpIfSmi(r0, &to_string); |
| STATIC_ASSERT(FIRST_NONSTRING_TYPE == SYMBOL_TYPE); |
| __ CompareObjectType(r0, r3, r3, FIRST_NONSTRING_TYPE); |
| __ b(hi, &to_string); |
| __ b(eq, &symbol_descriptive_string); |
| __ b(&drop_frame_and_ret); |
| } |
| |
| // 2b. No arguments, return the empty string (and pop the receiver). |
| __ bind(&no_arguments); |
| { |
| __ LoadRoot(r0, Heap::kempty_stringRootIndex); |
| __ Ret(1); |
| } |
| |
| // 3a. Convert r0 to a string. |
| __ bind(&to_string); |
| { |
| FrameScope scope(masm, StackFrame::MANUAL); |
| __ SmiTag(r2); |
| __ EnterBuiltinFrame(cp, r1, r2); |
| __ Call(masm->isolate()->builtins()->ToString(), RelocInfo::CODE_TARGET); |
| __ LeaveBuiltinFrame(cp, r1, r2); |
| __ SmiUntag(r2); |
| } |
| __ b(&drop_frame_and_ret); |
| |
| // 3b. Convert symbol in r0 to a string. |
| __ bind(&symbol_descriptive_string); |
| { |
| __ Drop(r2); |
| __ Drop(1); |
| __ Push(r0); |
| __ TailCallRuntime(Runtime::kSymbolDescriptiveString); |
| } |
| |
| __ bind(&drop_frame_and_ret); |
| { |
| __ Drop(r2); |
| __ Ret(1); |
| } |
| } |
| |
| // static |
| void Builtins::Generate_StringConstructor_ConstructStub(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- r0 : number of arguments |
| // -- r1 : constructor function |
| // -- r3 : new target |
| // -- cp : context |
| // -- lr : return address |
| // -- sp[(argc - n - 1) * 4] : arg[n] (zero based) |
| // -- sp[argc * 4] : receiver |
| // ----------------------------------- |
| |
| // 1. Make sure we operate in the context of the called function. |
| __ ldr(cp, FieldMemOperand(r1, JSFunction::kContextOffset)); |
| |
| // 2. Load the first argument into r2. |
| { |
| Label no_arguments, done; |
| __ mov(r6, r0); // Store argc in r6. |
| __ sub(r0, r0, Operand(1), SetCC); |
| __ b(lo, &no_arguments); |
| __ ldr(r2, MemOperand(sp, r0, LSL, kPointerSizeLog2)); |
| __ b(&done); |
| __ bind(&no_arguments); |
| __ LoadRoot(r2, Heap::kempty_stringRootIndex); |
| __ bind(&done); |
| } |
| |
| // 3. Make sure r2 is a string. |
| { |
| Label convert, done_convert; |
| __ JumpIfSmi(r2, &convert); |
| __ CompareObjectType(r2, r4, r4, FIRST_NONSTRING_TYPE); |
| __ b(lo, &done_convert); |
| __ bind(&convert); |
| { |
| FrameScope scope(masm, StackFrame::MANUAL); |
| __ SmiTag(r6); |
| __ EnterBuiltinFrame(cp, r1, r6); |
| __ Push(r3); |
| __ Move(r0, r2); |
| __ Call(masm->isolate()->builtins()->ToString(), RelocInfo::CODE_TARGET); |
| __ Move(r2, r0); |
| __ Pop(r3); |
| __ LeaveBuiltinFrame(cp, r1, r6); |
| __ SmiUntag(r6); |
| } |
| __ bind(&done_convert); |
| } |
| |
| // 4. Check if new target and constructor differ. |
| Label drop_frame_and_ret, new_object; |
| __ cmp(r1, r3); |
| __ b(ne, &new_object); |
| |
| // 5. Allocate a JSValue wrapper for the string. |
| __ AllocateJSValue(r0, r1, r2, r4, r5, &new_object); |
| __ b(&drop_frame_and_ret); |
| |
| // 6. Fallback to the runtime to create new object. |
| __ bind(&new_object); |
| { |
| FrameScope scope(masm, StackFrame::MANUAL); |
| FastNewObjectStub stub(masm->isolate()); |
| __ SmiTag(r6); |
| __ EnterBuiltinFrame(cp, r1, r6); |
| __ Push(r2); // first argument |
| __ CallStub(&stub); |
| __ Pop(r2); |
| __ LeaveBuiltinFrame(cp, r1, r6); |
| __ SmiUntag(r6); |
| } |
| __ str(r2, FieldMemOperand(r0, JSValue::kValueOffset)); |
| |
| __ bind(&drop_frame_and_ret); |
| { |
| __ Drop(r6); |
| __ Ret(1); |
| } |
| } |
| |
| static void GenerateTailCallToSharedCode(MacroAssembler* masm) { |
| __ ldr(r2, FieldMemOperand(r1, JSFunction::kSharedFunctionInfoOffset)); |
| __ ldr(r2, FieldMemOperand(r2, SharedFunctionInfo::kCodeOffset)); |
| __ add(r2, r2, Operand(Code::kHeaderSize - kHeapObjectTag)); |
| __ Jump(r2); |
| } |
| |
| static void GenerateTailCallToReturnedCode(MacroAssembler* masm, |
| Runtime::FunctionId function_id) { |
| // ----------- S t a t e ------------- |
| // -- r0 : argument count (preserved for callee) |
| // -- r1 : target function (preserved for callee) |
| // -- r3 : new target (preserved for callee) |
| // ----------------------------------- |
| { |
| FrameAndConstantPoolScope scope(masm, StackFrame::INTERNAL); |
| // Push the number of arguments to the callee. |
| __ SmiTag(r0); |
| __ push(r0); |
| // Push a copy of the target function and the new target. |
| __ push(r1); |
| __ push(r3); |
| // Push function as parameter to the runtime call. |
| __ Push(r1); |
| |
| __ CallRuntime(function_id, 1); |
| __ mov(r2, r0); |
| |
| // Restore target function and new target. |
| __ pop(r3); |
| __ pop(r1); |
| __ pop(r0); |
| __ SmiUntag(r0, r0); |
| } |
| __ add(r2, r2, Operand(Code::kHeaderSize - kHeapObjectTag)); |
| __ Jump(r2); |
| } |
| |
| void Builtins::Generate_InOptimizationQueue(MacroAssembler* masm) { |
| // Checking whether the queued function is ready for install is optional, |
| // since we come across interrupts and stack checks elsewhere. However, |
| // not checking may delay installing ready functions, and always checking |
| // would be quite expensive. A good compromise is to first check against |
| // stack limit as a cue for an interrupt signal. |
| Label ok; |
| __ LoadRoot(ip, Heap::kStackLimitRootIndex); |
| __ cmp(sp, Operand(ip)); |
| __ b(hs, &ok); |
| |
| GenerateTailCallToReturnedCode(masm, Runtime::kTryInstallOptimizedCode); |
| |
| __ bind(&ok); |
| GenerateTailCallToSharedCode(masm); |
| } |
| |
| namespace { |
| |
| void Generate_JSConstructStubHelper(MacroAssembler* masm, bool is_api_function, |
| bool create_implicit_receiver, |
| bool check_derived_construct) { |
| // ----------- S t a t e ------------- |
| // -- r0 : number of arguments |
| // -- r1 : constructor function |
| // -- r3 : new target |
| // -- cp : context |
| // -- lr : return address |
| // -- sp[...]: constructor arguments |
| // ----------------------------------- |
| |
| Isolate* isolate = masm->isolate(); |
| |
| // Enter a construct frame. |
| { |
| FrameAndConstantPoolScope scope(masm, StackFrame::CONSTRUCT); |
| |
| // Preserve the incoming parameters on the stack. |
| __ SmiTag(r0); |
| __ Push(cp, r0); |
| |
| if (create_implicit_receiver) { |
| // Allocate the new receiver object. |
| __ Push(r1, r3); |
| FastNewObjectStub stub(masm->isolate()); |
| __ CallStub(&stub); |
| __ mov(r4, r0); |
| __ Pop(r1, r3); |
| |
| // ----------- S t a t e ------------- |
| // -- r1: constructor function |
| // -- r3: new target |
| // -- r4: newly allocated object |
| // ----------------------------------- |
| |
| // Retrieve smi-tagged arguments count from the stack. |
| __ ldr(r0, MemOperand(sp)); |
| } |
| |
| __ SmiUntag(r0); |
| |
| if (create_implicit_receiver) { |
| // Push the allocated receiver to the stack. We need two copies |
| // because we may have to return the original one and the calling |
| // conventions dictate that the called function pops the receiver. |
| __ push(r4); |
| __ push(r4); |
| } else { |
| __ PushRoot(Heap::kTheHoleValueRootIndex); |
| } |
| |
| // Set up pointer to last argument. |
| __ add(r2, fp, Operand(StandardFrameConstants::kCallerSPOffset)); |
| |
| // Copy arguments and receiver to the expression stack. |
| // r0: number of arguments |
| // r1: constructor function |
| // r2: address of last argument (caller sp) |
| // r3: new target |
| // r4: number of arguments (smi-tagged) |
| // sp[0]: receiver |
| // sp[1]: receiver |
| // sp[2]: number of arguments (smi-tagged) |
| Label loop, entry; |
| __ SmiTag(r4, r0); |
| __ b(&entry); |
| __ bind(&loop); |
| __ ldr(ip, MemOperand(r2, r4, LSL, kPointerSizeLog2 - 1)); |
| __ push(ip); |
| __ bind(&entry); |
| __ sub(r4, r4, Operand(2), SetCC); |
| __ b(ge, &loop); |
| |
| // Call the function. |
| // r0: number of arguments |
| // r1: constructor function |
| // r3: new target |
| ParameterCount actual(r0); |
| __ InvokeFunction(r1, r3, actual, CALL_FUNCTION, |
| CheckDebugStepCallWrapper()); |
| |
| // Store offset of return address for deoptimizer. |
| if (create_implicit_receiver && !is_api_function) { |
| masm->isolate()->heap()->SetConstructStubDeoptPCOffset(masm->pc_offset()); |
| } |
| |
| // Restore context from the frame. |
| // r0: result |
| // sp[0]: receiver |
| // sp[1]: number of arguments (smi-tagged) |
| __ ldr(cp, MemOperand(fp, ConstructFrameConstants::kContextOffset)); |
| |
| if (create_implicit_receiver) { |
| // If the result is an object (in the ECMA sense), we should get rid |
| // of the receiver and use the result; see ECMA-262 section 13.2.2-7 |
| // on page 74. |
| Label use_receiver, exit; |
| |
| // If the result is a smi, it is *not* an object in the ECMA sense. |
| // r0: result |
| // sp[0]: receiver |
| // sp[1]: number of arguments (smi-tagged) |
| __ JumpIfSmi(r0, &use_receiver); |
| |
| // If the type of the result (stored in its map) is less than |
| // FIRST_JS_RECEIVER_TYPE, it is not an object in the ECMA sense. |
| __ CompareObjectType(r0, r1, r3, FIRST_JS_RECEIVER_TYPE); |
| __ b(ge, &exit); |
| |
| // Throw away the result of the constructor invocation and use the |
| // on-stack receiver as the result. |
| __ bind(&use_receiver); |
| __ ldr(r0, MemOperand(sp)); |
| |
| // Remove receiver from the stack, remove caller arguments, and |
| // return. |
| __ bind(&exit); |
| // r0: result |
| // sp[0]: receiver (newly allocated object) |
| // sp[1]: number of arguments (smi-tagged) |
| __ ldr(r1, MemOperand(sp, 1 * kPointerSize)); |
| } else { |
| __ ldr(r1, MemOperand(sp)); |
| } |
| |
| // Leave construct frame. |
| } |
| |
| // ES6 9.2.2. Step 13+ |
| // Check that the result is not a Smi, indicating that the constructor result |
| // from a derived class is neither undefined nor an Object. |
| if (check_derived_construct) { |
| Label dont_throw; |
| __ JumpIfNotSmi(r0, &dont_throw); |
| { |
| FrameScope scope(masm, StackFrame::INTERNAL); |
| __ CallRuntime(Runtime::kThrowDerivedConstructorReturnedNonObject); |
| } |
| __ bind(&dont_throw); |
| } |
| |
| __ add(sp, sp, Operand(r1, LSL, kPointerSizeLog2 - 1)); |
| __ add(sp, sp, Operand(kPointerSize)); |
| if (create_implicit_receiver) { |
| __ IncrementCounter(isolate->counters()->constructed_objects(), 1, r1, r2); |
| } |
| __ Jump(lr); |
| } |
| |
| } // namespace |
| |
| void Builtins::Generate_JSConstructStubGeneric(MacroAssembler* masm) { |
| Generate_JSConstructStubHelper(masm, false, true, false); |
| } |
| |
| void Builtins::Generate_JSConstructStubApi(MacroAssembler* masm) { |
| Generate_JSConstructStubHelper(masm, true, false, false); |
| } |
| |
| void Builtins::Generate_JSBuiltinsConstructStub(MacroAssembler* masm) { |
| Generate_JSConstructStubHelper(masm, false, false, false); |
| } |
| |
| void Builtins::Generate_JSBuiltinsConstructStubForDerived( |
| MacroAssembler* masm) { |
| Generate_JSConstructStubHelper(masm, false, false, true); |
| } |
| |
| // static |
| void Builtins::Generate_ResumeGeneratorTrampoline(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- r0 : the value to pass to the generator |
| // -- r1 : the JSGeneratorObject to resume |
| // -- r2 : the resume mode (tagged) |
| // -- lr : return address |
| // ----------------------------------- |
| __ AssertGeneratorObject(r1); |
| |
| // Store input value into generator object. |
| __ str(r0, FieldMemOperand(r1, JSGeneratorObject::kInputOrDebugPosOffset)); |
| __ RecordWriteField(r1, JSGeneratorObject::kInputOrDebugPosOffset, r0, r3, |
| kLRHasNotBeenSaved, kDontSaveFPRegs); |
| |
| // Store resume mode into generator object. |
| __ str(r2, FieldMemOperand(r1, JSGeneratorObject::kResumeModeOffset)); |
| |
| // Load suspended function and context. |
| __ ldr(cp, FieldMemOperand(r1, JSGeneratorObject::kContextOffset)); |
| __ ldr(r4, FieldMemOperand(r1, JSGeneratorObject::kFunctionOffset)); |
| |
| // Flood function if we are stepping. |
| Label prepare_step_in_if_stepping, prepare_step_in_suspended_generator; |
| Label stepping_prepared; |
| ExternalReference last_step_action = |
| ExternalReference::debug_last_step_action_address(masm->isolate()); |
| STATIC_ASSERT(StepFrame > StepIn); |
| __ mov(ip, Operand(last_step_action)); |
| __ ldrsb(ip, MemOperand(ip)); |
| __ cmp(ip, Operand(StepIn)); |
| __ b(ge, &prepare_step_in_if_stepping); |
| |
| // Flood function if we need to continue stepping in the suspended generator. |
| ExternalReference debug_suspended_generator = |
| ExternalReference::debug_suspended_generator_address(masm->isolate()); |
| __ mov(ip, Operand(debug_suspended_generator)); |
| __ ldr(ip, MemOperand(ip)); |
| __ cmp(ip, Operand(r1)); |
| __ b(eq, &prepare_step_in_suspended_generator); |
| __ bind(&stepping_prepared); |
| |
| // Push receiver. |
| __ ldr(ip, FieldMemOperand(r1, JSGeneratorObject::kReceiverOffset)); |
| __ Push(ip); |
| |
| // ----------- S t a t e ------------- |
| // -- r1 : the JSGeneratorObject to resume |
| // -- r2 : the resume mode (tagged) |
| // -- r4 : generator function |
| // -- cp : generator context |
| // -- lr : return address |
| // -- sp[0] : generator receiver |
| // ----------------------------------- |
| |
| // Push holes for arguments to generator function. Since the parser forced |
| // context allocation for any variables in generators, the actual argument |
| // values have already been copied into the context and these dummy values |
| // will never be used. |
| __ ldr(r3, FieldMemOperand(r4, JSFunction::kSharedFunctionInfoOffset)); |
| __ ldr(r3, |
| FieldMemOperand(r3, SharedFunctionInfo::kFormalParameterCountOffset)); |
| { |
| Label done_loop, loop; |
| __ bind(&loop); |
| __ sub(r3, r3, Operand(Smi::FromInt(1)), SetCC); |
| __ b(mi, &done_loop); |
| __ PushRoot(Heap::kTheHoleValueRootIndex); |
| __ b(&loop); |
| __ bind(&done_loop); |
| } |
| |
| // Underlying function needs to have bytecode available. |
| if (FLAG_debug_code) { |
| __ ldr(r3, FieldMemOperand(r4, JSFunction::kSharedFunctionInfoOffset)); |
| __ ldr(r3, FieldMemOperand(r3, SharedFunctionInfo::kFunctionDataOffset)); |
| __ CompareObjectType(r3, r3, r3, BYTECODE_ARRAY_TYPE); |
| __ Assert(eq, kMissingBytecodeArray); |
| } |
| |
| // Resume (Ignition/TurboFan) generator object. |
| { |
| __ ldr(r0, FieldMemOperand(r4, JSFunction::kSharedFunctionInfoOffset)); |
| __ ldr(r0, FieldMemOperand( |
| r0, SharedFunctionInfo::kFormalParameterCountOffset)); |
| __ SmiUntag(r0); |
| // We abuse new.target both to indicate that this is a resume call and to |
| // pass in the generator object. In ordinary calls, new.target is always |
| // undefined because generator functions are non-constructable. |
| __ Move(r3, r1); |
| __ Move(r1, r4); |
| __ ldr(r5, FieldMemOperand(r1, JSFunction::kCodeEntryOffset)); |
| __ Jump(r5); |
| } |
| |
| __ bind(&prepare_step_in_if_stepping); |
| { |
| FrameAndConstantPoolScope scope(masm, StackFrame::INTERNAL); |
| __ Push(r1, r2, r4); |
| __ CallRuntime(Runtime::kDebugPrepareStepInIfStepping); |
| __ Pop(r1, r2); |
| __ ldr(r4, FieldMemOperand(r1, JSGeneratorObject::kFunctionOffset)); |
| } |
| __ b(&stepping_prepared); |
| |
| __ bind(&prepare_step_in_suspended_generator); |
| { |
| FrameAndConstantPoolScope scope(masm, StackFrame::INTERNAL); |
| __ Push(r1, r2); |
| __ CallRuntime(Runtime::kDebugPrepareStepInSuspendedGenerator); |
| __ Pop(r1, r2); |
| __ ldr(r4, FieldMemOperand(r1, JSGeneratorObject::kFunctionOffset)); |
| } |
| __ b(&stepping_prepared); |
| } |
| |
| void Builtins::Generate_ConstructedNonConstructable(MacroAssembler* masm) { |
| FrameScope scope(masm, StackFrame::INTERNAL); |
| __ push(r1); |
| __ CallRuntime(Runtime::kThrowConstructedNonConstructable); |
| } |
| |
| enum IsTagged { kArgcIsSmiTagged, kArgcIsUntaggedInt }; |
| |
| // Clobbers r2; preserves all other registers. |
| static void Generate_CheckStackOverflow(MacroAssembler* masm, Register argc, |
| IsTagged argc_is_tagged) { |
| // Check the stack for overflow. We are not trying to catch |
| // interruptions (e.g. debug break and preemption) here, so the "real stack |
| // limit" is checked. |
| Label okay; |
| __ LoadRoot(r2, Heap::kRealStackLimitRootIndex); |
| // Make r2 the space we have left. The stack might already be overflowed |
| // here which will cause r2 to become negative. |
| __ sub(r2, sp, r2); |
| // Check if the arguments will overflow the stack. |
| if (argc_is_tagged == kArgcIsSmiTagged) { |
| __ cmp(r2, Operand::PointerOffsetFromSmiKey(argc)); |
| } else { |
| DCHECK(argc_is_tagged == kArgcIsUntaggedInt); |
| __ cmp(r2, Operand(argc, LSL, kPointerSizeLog2)); |
| } |
| __ b(gt, &okay); // Signed comparison. |
| |
| // Out of stack space. |
| __ CallRuntime(Runtime::kThrowStackOverflow); |
| |
| __ bind(&okay); |
| } |
| |
| static void Generate_JSEntryTrampolineHelper(MacroAssembler* masm, |
| bool is_construct) { |
| // Called from Generate_JS_Entry |
| // r0: new.target |
| // r1: function |
| // r2: receiver |
| // r3: argc |
| // r4: argv |
| // r5-r6, r8 (if !FLAG_enable_embedded_constant_pool) and cp may be clobbered |
| ProfileEntryHookStub::MaybeCallEntryHook(masm); |
| |
| // Enter an internal frame. |
| { |
| FrameScope scope(masm, StackFrame::INTERNAL); |
| |
| // Setup the context (we need to use the caller context from the isolate). |
| ExternalReference context_address(Isolate::kContextAddress, |
| masm->isolate()); |
| __ mov(cp, Operand(context_address)); |
| __ ldr(cp, MemOperand(cp)); |
| |
| __ InitializeRootRegister(); |
| |
| // Push the function and the receiver onto the stack. |
| __ Push(r1, r2); |
| |
| // Check if we have enough stack space to push all arguments. |
| // Clobbers r2. |
| Generate_CheckStackOverflow(masm, r3, kArgcIsUntaggedInt); |
| |
| // Remember new.target. |
| __ mov(r5, r0); |
| |
| // Copy arguments to the stack in a loop. |
| // r1: function |
| // r3: argc |
| // r4: argv, i.e. points to first arg |
| Label loop, entry; |
| __ add(r2, r4, Operand(r3, LSL, kPointerSizeLog2)); |
| // r2 points past last arg. |
| __ b(&entry); |
| __ bind(&loop); |
| __ ldr(r0, MemOperand(r4, kPointerSize, PostIndex)); // read next parameter |
| __ ldr(r0, MemOperand(r0)); // dereference handle |
| __ push(r0); // push parameter |
| __ bind(&entry); |
| __ cmp(r4, r2); |
| __ b(ne, &loop); |
| |
| // Setup new.target and argc. |
| __ mov(r0, Operand(r3)); |
| __ mov(r3, Operand(r5)); |
| |
| // Initialize all JavaScript callee-saved registers, since they will be seen |
| // by the garbage collector as part of handlers. |
| __ LoadRoot(r4, Heap::kUndefinedValueRootIndex); |
| __ mov(r5, Operand(r4)); |
| __ mov(r6, Operand(r4)); |
| if (!FLAG_enable_embedded_constant_pool) { |
| __ mov(r8, Operand(r4)); |
| } |
| if (kR9Available == 1) { |
| __ mov(r9, Operand(r4)); |
| } |
| |
| // Invoke the code. |
| Handle<Code> builtin = is_construct |
| ? masm->isolate()->builtins()->Construct() |
| : masm->isolate()->builtins()->Call(); |
| __ Call(builtin, RelocInfo::CODE_TARGET); |
| |
| // Exit the JS frame and remove the parameters (except function), and |
| // return. |
| // Respect ABI stack constraint. |
| } |
| __ Jump(lr); |
| |
| // r0: result |
| } |
| |
| void Builtins::Generate_JSEntryTrampoline(MacroAssembler* masm) { |
| Generate_JSEntryTrampolineHelper(masm, false); |
| } |
| |
| void Builtins::Generate_JSConstructEntryTrampoline(MacroAssembler* masm) { |
| Generate_JSEntryTrampolineHelper(masm, true); |
| } |
| |
| static void LeaveInterpreterFrame(MacroAssembler* masm, Register scratch) { |
| Register args_count = scratch; |
| |
| // Get the arguments + receiver count. |
| __ ldr(args_count, |
| MemOperand(fp, InterpreterFrameConstants::kBytecodeArrayFromFp)); |
| __ ldr(args_count, |
| FieldMemOperand(args_count, BytecodeArray::kParameterSizeOffset)); |
| |
| // Leave the frame (also dropping the register file). |
| __ LeaveFrame(StackFrame::JAVA_SCRIPT); |
| |
| // Drop receiver + arguments. |
| __ add(sp, sp, args_count, LeaveCC); |
| } |
| |
| // Generate code for entering a JS function with the interpreter. |
| // On entry to the function the receiver and arguments have been pushed on the |
| // stack left to right. The actual argument count matches the formal parameter |
| // count expected by the function. |
| // |
| // The live registers are: |
| // o r1: the JS function object being called. |
| // o r3: the new target |
| // o cp: our context |
| // o pp: the caller's constant pool pointer (if enabled) |
| // o fp: the caller's frame pointer |
| // o sp: stack pointer |
| // o lr: return address |
| // |
| // The function builds an interpreter frame. See InterpreterFrameConstants in |
| // frames.h for its layout. |
| void Builtins::Generate_InterpreterEntryTrampoline(MacroAssembler* masm) { |
| ProfileEntryHookStub::MaybeCallEntryHook(masm); |
| |
| // Open a frame scope to indicate that there is a frame on the stack. The |
| // MANUAL indicates that the scope shouldn't actually generate code to set up |
| // the frame (that is done below). |
| FrameScope frame_scope(masm, StackFrame::MANUAL); |
| __ PushStandardFrame(r1); |
| |
| // Get the bytecode array from the function object (or from the DebugInfo if |
| // it is present) and load it into kInterpreterBytecodeArrayRegister. |
| __ ldr(r0, FieldMemOperand(r1, JSFunction::kSharedFunctionInfoOffset)); |
| Register debug_info = kInterpreterBytecodeArrayRegister; |
| DCHECK(!debug_info.is(r0)); |
| __ ldr(debug_info, FieldMemOperand(r0, SharedFunctionInfo::kDebugInfoOffset)); |
| __ cmp(debug_info, Operand(DebugInfo::uninitialized())); |
| // Load original bytecode array or the debug copy. |
| __ ldr(kInterpreterBytecodeArrayRegister, |
| FieldMemOperand(r0, SharedFunctionInfo::kFunctionDataOffset), eq); |
| __ ldr(kInterpreterBytecodeArrayRegister, |
| FieldMemOperand(debug_info, DebugInfo::kDebugBytecodeArrayIndex), ne); |
| |
| // Check whether we should continue to use the interpreter. |
| Label switch_to_different_code_kind; |
| __ ldr(r0, FieldMemOperand(r0, SharedFunctionInfo::kCodeOffset)); |
| __ cmp(r0, Operand(masm->CodeObject())); // Self-reference to this code. |
| __ b(ne, &switch_to_different_code_kind); |
| |
| // Increment invocation count for the function. |
| __ ldr(r2, FieldMemOperand(r1, JSFunction::kLiteralsOffset)); |
| __ ldr(r2, FieldMemOperand(r2, LiteralsArray::kFeedbackVectorOffset)); |
| __ ldr(r9, FieldMemOperand( |
| r2, TypeFeedbackVector::kInvocationCountIndex * kPointerSize + |
| TypeFeedbackVector::kHeaderSize)); |
| __ add(r9, r9, Operand(Smi::FromInt(1))); |
| __ str(r9, FieldMemOperand( |
| r2, TypeFeedbackVector::kInvocationCountIndex * kPointerSize + |
| TypeFeedbackVector::kHeaderSize)); |
| |
| // Check function data field is actually a BytecodeArray object. |
| if (FLAG_debug_code) { |
| __ SmiTst(kInterpreterBytecodeArrayRegister); |
| __ Assert(ne, kFunctionDataShouldBeBytecodeArrayOnInterpreterEntry); |
| __ CompareObjectType(kInterpreterBytecodeArrayRegister, r0, no_reg, |
| BYTECODE_ARRAY_TYPE); |
| __ Assert(eq, kFunctionDataShouldBeBytecodeArrayOnInterpreterEntry); |
| } |
| |
| // Reset code age. |
| __ mov(r9, Operand(BytecodeArray::kNoAgeBytecodeAge)); |
| __ strb(r9, FieldMemOperand(kInterpreterBytecodeArrayRegister, |
| BytecodeArray::kBytecodeAgeOffset)); |
| |
| // Load the initial bytecode offset. |
| __ mov(kInterpreterBytecodeOffsetRegister, |
| Operand(BytecodeArray::kHeaderSize - kHeapObjectTag)); |
| |
| // Push new.target, bytecode array and Smi tagged bytecode array offset. |
| __ SmiTag(r0, kInterpreterBytecodeOffsetRegister); |
| __ Push(r3, kInterpreterBytecodeArrayRegister, r0); |
| |
| // Allocate the local and temporary register file on the stack. |
| { |
| // Load frame size from the BytecodeArray object. |
| __ ldr(r4, FieldMemOperand(kInterpreterBytecodeArrayRegister, |
| BytecodeArray::kFrameSizeOffset)); |
| |
| // Do a stack check to ensure we don't go over the limit. |
| Label ok; |
| __ sub(r9, sp, Operand(r4)); |
| __ LoadRoot(r2, Heap::kRealStackLimitRootIndex); |
| __ cmp(r9, Operand(r2)); |
| __ b(hs, &ok); |
| __ CallRuntime(Runtime::kThrowStackOverflow); |
| __ bind(&ok); |
| |
| // If ok, push undefined as the initial value for all register file entries. |
| Label loop_header; |
| Label loop_check; |
| __ LoadRoot(r9, Heap::kUndefinedValueRootIndex); |
| __ b(&loop_check, al); |
| __ bind(&loop_header); |
| // TODO(rmcilroy): Consider doing more than one push per loop iteration. |
| __ push(r9); |
| // Continue loop if not done. |
| __ bind(&loop_check); |
| __ sub(r4, r4, Operand(kPointerSize), SetCC); |
| __ b(&loop_header, ge); |
| } |
| |
| // Load accumulator and dispatch table into registers. |
| __ LoadRoot(kInterpreterAccumulatorRegister, Heap::kUndefinedValueRootIndex); |
| __ mov(kInterpreterDispatchTableRegister, |
| Operand(ExternalReference::interpreter_dispatch_table_address( |
| masm->isolate()))); |
| |
| // Dispatch to the first bytecode handler for the function. |
| __ ldrb(r1, MemOperand(kInterpreterBytecodeArrayRegister, |
| kInterpreterBytecodeOffsetRegister)); |
| __ ldr(ip, MemOperand(kInterpreterDispatchTableRegister, r1, LSL, |
| kPointerSizeLog2)); |
| __ Call(ip); |
| masm->isolate()->heap()->SetInterpreterEntryReturnPCOffset(masm->pc_offset()); |
| |
| // The return value is in r0. |
| LeaveInterpreterFrame(masm, r2); |
| __ Jump(lr); |
| |
| // If the shared code is no longer this entry trampoline, then the underlying |
| // function has been switched to a different kind of code and we heal the |
| // closure by switching the code entry field over to the new code as well. |
| __ bind(&switch_to_different_code_kind); |
| __ LeaveFrame(StackFrame::JAVA_SCRIPT); |
| __ ldr(r4, FieldMemOperand(r1, JSFunction::kSharedFunctionInfoOffset)); |
| __ ldr(r4, FieldMemOperand(r4, SharedFunctionInfo::kCodeOffset)); |
| __ add(r4, r4, Operand(Code::kHeaderSize - kHeapObjectTag)); |
| __ str(r4, FieldMemOperand(r1, JSFunction::kCodeEntryOffset)); |
| __ RecordWriteCodeEntryField(r1, r4, r5); |
| __ Jump(r4); |
| } |
| |
| static void Generate_StackOverflowCheck(MacroAssembler* masm, Register num_args, |
| Register scratch, |
| Label* stack_overflow) { |
| // Check the stack for overflow. We are not trying to catch |
| // interruptions (e.g. debug break and preemption) here, so the "real stack |
| // limit" is checked. |
| __ LoadRoot(scratch, Heap::kRealStackLimitRootIndex); |
| // Make scratch the space we have left. The stack might already be overflowed |
| // here which will cause scratch to become negative. |
| __ sub(scratch, sp, scratch); |
| // Check if the arguments will overflow the stack. |
| __ cmp(scratch, Operand(num_args, LSL, kPointerSizeLog2)); |
| __ b(le, stack_overflow); // Signed comparison. |
| } |
| |
| static void Generate_InterpreterPushArgs(MacroAssembler* masm, |
| Register num_args, Register index, |
| Register limit, Register scratch, |
| Label* stack_overflow) { |
| // Add a stack check before pushing arguments. |
| Generate_StackOverflowCheck(masm, num_args, scratch, stack_overflow); |
| |
| // Find the address of the last argument. |
| __ mov(limit, num_args); |
| __ mov(limit, Operand(limit, LSL, kPointerSizeLog2)); |
| __ sub(limit, index, limit); |
| |
| Label loop_header, loop_check; |
| __ b(al, &loop_check); |
| __ bind(&loop_header); |
| __ ldr(scratch, MemOperand(index, -kPointerSize, PostIndex)); |
| __ push(scratch); |
| __ bind(&loop_check); |
| __ cmp(index, limit); |
| __ b(gt, &loop_header); |
| } |
| |
| // static |
| void Builtins::Generate_InterpreterPushArgsAndCallImpl( |
| MacroAssembler* masm, TailCallMode tail_call_mode, |
| CallableType function_type) { |
| // ----------- S t a t e ------------- |
| // -- r0 : the number of arguments (not including the receiver) |
| // -- r2 : the address of the first argument to be pushed. Subsequent |
| // arguments should be consecutive above this, in the same order as |
| // they are to be pushed onto the stack. |
| // -- r1 : the target to call (can be any Object). |
| // ----------------------------------- |
| Label stack_overflow; |
| |
| __ add(r3, r0, Operand(1)); // Add one for receiver. |
| |
| // Push the arguments. r2, r4, r5 will be modified. |
| Generate_InterpreterPushArgs(masm, r3, r2, r4, r5, &stack_overflow); |
| |
| // Call the target. |
| if (function_type == CallableType::kJSFunction) { |
| __ Jump(masm->isolate()->builtins()->CallFunction(ConvertReceiverMode::kAny, |
| tail_call_mode), |
| RelocInfo::CODE_TARGET); |
| } else { |
| DCHECK_EQ(function_type, CallableType::kAny); |
| __ Jump(masm->isolate()->builtins()->Call(ConvertReceiverMode::kAny, |
| tail_call_mode), |
| RelocInfo::CODE_TARGET); |
| } |
| |
| __ bind(&stack_overflow); |
| { |
| __ TailCallRuntime(Runtime::kThrowStackOverflow); |
| // Unreachable code. |
| __ bkpt(0); |
| } |
| } |
| |
| // static |
| void Builtins::Generate_InterpreterPushArgsAndConstructImpl( |
| MacroAssembler* masm, CallableType construct_type) { |
| // ----------- S t a t e ------------- |
| // -- r0 : argument count (not including receiver) |
| // -- r3 : new target |
| // -- r1 : constructor to call |
| // -- r2 : allocation site feedback if available, undefined otherwise. |
| // -- r4 : address of the first argument |
| // ----------------------------------- |
| Label stack_overflow; |
| |
| // Push a slot for the receiver to be constructed. |
| __ mov(ip, Operand::Zero()); |
| __ push(ip); |
| |
| // Push the arguments. r5, r4, r6 will be modified. |
| Generate_InterpreterPushArgs(masm, r0, r4, r5, r6, &stack_overflow); |
| |
| __ AssertUndefinedOrAllocationSite(r2, r5); |
| if (construct_type == CallableType::kJSFunction) { |
| __ AssertFunction(r1); |
| |
| // Tail call to the function-specific construct stub (still in the caller |
| // context at this point). |
| __ ldr(r4, FieldMemOperand(r1, JSFunction::kSharedFunctionInfoOffset)); |
| __ ldr(r4, FieldMemOperand(r4, SharedFunctionInfo::kConstructStubOffset)); |
| // Jump to the construct function. |
| __ add(pc, r4, Operand(Code::kHeaderSize - kHeapObjectTag)); |
| |
| } else { |
| DCHECK_EQ(construct_type, CallableType::kAny); |
| // Call the constructor with r0, r1, and r3 unmodified. |
| __ Jump(masm->isolate()->builtins()->Construct(), RelocInfo::CODE_TARGET); |
| } |
| |
| __ bind(&stack_overflow); |
| { |
| __ TailCallRuntime(Runtime::kThrowStackOverflow); |
| // Unreachable code. |
| __ bkpt(0); |
| } |
| } |
| |
| // static |
| void Builtins::Generate_InterpreterPushArgsAndConstructArray( |
| MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- r0 : argument count (not including receiver) |
| // -- r1 : target to call verified to be Array function |
| // -- r2 : allocation site feedback if available, undefined otherwise. |
| // -- r3 : address of the first argument |
| // ----------------------------------- |
| Label stack_overflow; |
| |
| __ add(r4, r0, Operand(1)); // Add one for receiver. |
| |
| // TODO(mythria): Add a stack check before pushing arguments. |
| // Push the arguments. r3, r5, r6 will be modified. |
| Generate_InterpreterPushArgs(masm, r4, r3, r5, r6, &stack_overflow); |
| |
| // Array constructor expects constructor in r3. It is same as r1 here. |
| __ mov(r3, r1); |
| |
| ArrayConstructorStub stub(masm->isolate()); |
| __ TailCallStub(&stub); |
| |
| __ bind(&stack_overflow); |
| { |
| __ TailCallRuntime(Runtime::kThrowStackOverflow); |
| // Unreachable code. |
| __ bkpt(0); |
| } |
| } |
| |
| static void Generate_InterpreterEnterBytecode(MacroAssembler* masm) { |
| // Set the return address to the correct point in the interpreter entry |
| // trampoline. |
| Smi* interpreter_entry_return_pc_offset( |
| masm->isolate()->heap()->interpreter_entry_return_pc_offset()); |
| DCHECK_NE(interpreter_entry_return_pc_offset, Smi::kZero); |
| __ Move(r2, masm->isolate()->builtins()->InterpreterEntryTrampoline()); |
| __ add(lr, r2, Operand(interpreter_entry_return_pc_offset->value() + |
| Code::kHeaderSize - kHeapObjectTag)); |
| |
| // Initialize the dispatch table register. |
| __ mov(kInterpreterDispatchTableRegister, |
| Operand(ExternalReference::interpreter_dispatch_table_address( |
| masm->isolate()))); |
| |
| // Get the bytecode array pointer from the frame. |
| __ ldr(kInterpreterBytecodeArrayRegister, |
| MemOperand(fp, InterpreterFrameConstants::kBytecodeArrayFromFp)); |
| |
| if (FLAG_debug_code) { |
| // Check function data field is actually a BytecodeArray object. |
| __ SmiTst(kInterpreterBytecodeArrayRegister); |
| __ Assert(ne, kFunctionDataShouldBeBytecodeArrayOnInterpreterEntry); |
| __ CompareObjectType(kInterpreterBytecodeArrayRegister, r1, no_reg, |
| BYTECODE_ARRAY_TYPE); |
| __ Assert(eq, kFunctionDataShouldBeBytecodeArrayOnInterpreterEntry); |
| } |
| |
| // Get the target bytecode offset from the frame. |
| __ ldr(kInterpreterBytecodeOffsetRegister, |
| MemOperand(fp, InterpreterFrameConstants::kBytecodeOffsetFromFp)); |
| __ SmiUntag(kInterpreterBytecodeOffsetRegister); |
| |
| // Dispatch to the target bytecode. |
| __ ldrb(r1, MemOperand(kInterpreterBytecodeArrayRegister, |
| kInterpreterBytecodeOffsetRegister)); |
| __ ldr(ip, MemOperand(kInterpreterDispatchTableRegister, r1, LSL, |
| kPointerSizeLog2)); |
| __ mov(pc, ip); |
| } |
| |
| void Builtins::Generate_InterpreterEnterBytecodeAdvance(MacroAssembler* masm) { |
| // Advance the current bytecode offset stored within the given interpreter |
| // stack frame. This simulates what all bytecode handlers do upon completion |
| // of the underlying operation. |
| __ ldr(r1, MemOperand(fp, InterpreterFrameConstants::kBytecodeArrayFromFp)); |
| __ ldr(r2, MemOperand(fp, InterpreterFrameConstants::kBytecodeOffsetFromFp)); |
| __ ldr(cp, MemOperand(fp, StandardFrameConstants::kContextOffset)); |
| { |
| FrameScope scope(masm, StackFrame::INTERNAL); |
| __ Push(kInterpreterAccumulatorRegister, r1, r2); |
| __ CallRuntime(Runtime::kInterpreterAdvanceBytecodeOffset); |
| __ mov(r2, r0); // Result is the new bytecode offset. |
| __ Pop(kInterpreterAccumulatorRegister); |
| } |
| __ str(r2, MemOperand(fp, InterpreterFrameConstants::kBytecodeOffsetFromFp)); |
| |
| Generate_InterpreterEnterBytecode(masm); |
| } |
| |
| void Builtins::Generate_InterpreterEnterBytecodeDispatch(MacroAssembler* masm) { |
| Generate_InterpreterEnterBytecode(masm); |
| } |
| |
| void Builtins::Generate_CompileLazy(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- r0 : argument count (preserved for callee) |
| // -- r3 : new target (preserved for callee) |
| // -- r1 : target function (preserved for callee) |
| // ----------------------------------- |
| // First lookup code, maybe we don't need to compile! |
| Label gotta_call_runtime, gotta_call_runtime_no_stack; |
| Label try_shared; |
| Label loop_top, loop_bottom; |
| |
| Register argument_count = r0; |
| Register closure = r1; |
| Register new_target = r3; |
| __ push(argument_count); |
| __ push(new_target); |
| __ push(closure); |
| |
| Register map = argument_count; |
| Register index = r2; |
| __ ldr(map, FieldMemOperand(closure, JSFunction::kSharedFunctionInfoOffset)); |
| __ ldr(map, |
| FieldMemOperand(map, SharedFunctionInfo::kOptimizedCodeMapOffset)); |
| __ ldr(index, FieldMemOperand(map, FixedArray::kLengthOffset)); |
| __ cmp(index, Operand(Smi::FromInt(2))); |
| __ b(lt, &gotta_call_runtime); |
| |
| // r3 : native context |
| // r2 : length / index |
| // r0 : optimized code map |
| // stack[0] : new target |
| // stack[4] : closure |
| Register native_context = r3; |
| __ ldr(native_context, NativeContextMemOperand()); |
| |
| __ bind(&loop_top); |
| Register temp = r1; |
| Register array_pointer = r5; |
| |
| // Does the native context match? |
| __ add(array_pointer, map, Operand::PointerOffsetFromSmiKey(index)); |
| __ ldr(temp, FieldMemOperand(array_pointer, |
| SharedFunctionInfo::kOffsetToPreviousContext)); |
| __ ldr(temp, FieldMemOperand(temp, WeakCell::kValueOffset)); |
| __ cmp(temp, native_context); |
| __ b(ne, &loop_bottom); |
| |
| // Code available? |
| Register entry = r4; |
| __ ldr(entry, |
| FieldMemOperand(array_pointer, |
| SharedFunctionInfo::kOffsetToPreviousCachedCode)); |
| __ ldr(entry, FieldMemOperand(entry, WeakCell::kValueOffset)); |
| __ JumpIfSmi(entry, &try_shared); |
| |
| // Found code. Get it into the closure and return. |
| __ pop(closure); |
| // Store code entry in the closure. |
| __ add(entry, entry, Operand(Code::kHeaderSize - kHeapObjectTag)); |
| __ str(entry, FieldMemOperand(closure, JSFunction::kCodeEntryOffset)); |
| __ RecordWriteCodeEntryField(closure, entry, r5); |
| |
| // Link the closure into the optimized function list. |
| // r4 : code entry |
| // r3 : native context |
| // r1 : closure |
| __ ldr(r5, |
| ContextMemOperand(native_context, Context::OPTIMIZED_FUNCTIONS_LIST)); |
| __ str(r5, FieldMemOperand(closure, JSFunction::kNextFunctionLinkOffset)); |
| __ RecordWriteField(closure, JSFunction::kNextFunctionLinkOffset, r5, r0, |
| kLRHasNotBeenSaved, kDontSaveFPRegs, EMIT_REMEMBERED_SET, |
| OMIT_SMI_CHECK); |
| const int function_list_offset = |
| Context::SlotOffset(Context::OPTIMIZED_FUNCTIONS_LIST); |
| __ str(closure, |
| ContextMemOperand(native_context, Context::OPTIMIZED_FUNCTIONS_LIST)); |
| // Save closure before the write barrier. |
| __ mov(r5, closure); |
| __ RecordWriteContextSlot(native_context, function_list_offset, closure, r0, |
| kLRHasNotBeenSaved, kDontSaveFPRegs); |
| __ mov(closure, r5); |
| __ pop(new_target); |
| __ pop(argument_count); |
| __ Jump(entry); |
| |
| __ bind(&loop_bottom); |
| __ sub(index, index, Operand(Smi::FromInt(SharedFunctionInfo::kEntryLength))); |
| __ cmp(index, Operand(Smi::FromInt(1))); |
| __ b(gt, &loop_top); |
| |
| // We found no code. |
| __ jmp(&gotta_call_runtime); |
| |
| __ bind(&try_shared); |
| __ pop(closure); |
| __ pop(new_target); |
| __ pop(argument_count); |
| __ ldr(entry, |
| FieldMemOperand(closure, JSFunction::kSharedFunctionInfoOffset)); |
| // Is the shared function marked for tier up? |
| __ ldrb(r5, FieldMemOperand(entry, |
| SharedFunctionInfo::kMarkedForTierUpByteOffset)); |
| __ tst(r5, Operand(1 << SharedFunctionInfo::kMarkedForTierUpBitWithinByte)); |
| __ b(ne, &gotta_call_runtime_no_stack); |
| // Is the full code valid? |
| __ ldr(entry, FieldMemOperand(entry, SharedFunctionInfo::kCodeOffset)); |
| __ ldr(r5, FieldMemOperand(entry, Code::kFlagsOffset)); |
| __ and_(r5, r5, Operand(Code::KindField::kMask)); |
| __ mov(r5, Operand(r5, LSR, Code::KindField::kShift)); |
| __ cmp(r5, Operand(Code::BUILTIN)); |
| __ b(eq, &gotta_call_runtime_no_stack); |
| // Yes, install the full code. |
| __ add(entry, entry, Operand(Code::kHeaderSize - kHeapObjectTag)); |
| __ str(entry, FieldMemOperand(closure, JSFunction::kCodeEntryOffset)); |
| __ RecordWriteCodeEntryField(closure, entry, r5); |
| __ Jump(entry); |
| |
| __ bind(&gotta_call_runtime); |
| __ pop(closure); |
| __ pop(new_target); |
| __ pop(argument_count); |
| __ bind(&gotta_call_runtime_no_stack); |
| GenerateTailCallToReturnedCode(masm, Runtime::kCompileLazy); |
| } |
| |
| void Builtins::Generate_CompileBaseline(MacroAssembler* masm) { |
| GenerateTailCallToReturnedCode(masm, Runtime::kCompileBaseline); |
| } |
| |
| void Builtins::Generate_CompileOptimized(MacroAssembler* masm) { |
| GenerateTailCallToReturnedCode(masm, |
| Runtime::kCompileOptimized_NotConcurrent); |
| } |
| |
| void Builtins::Generate_CompileOptimizedConcurrent(MacroAssembler* masm) { |
| GenerateTailCallToReturnedCode(masm, Runtime::kCompileOptimized_Concurrent); |
| } |
| |
| void Builtins::Generate_InstantiateAsmJs(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- r0 : argument count (preserved for callee) |
| // -- r1 : new target (preserved for callee) |
| // -- r3 : target function (preserved for callee) |
| // ----------------------------------- |
| Label failed; |
| { |
| FrameScope scope(masm, StackFrame::INTERNAL); |
| // Preserve argument count for later compare. |
| __ Move(r4, r0); |
| // Push the number of arguments to the callee. |
| __ SmiTag(r0); |
| __ push(r0); |
| // Push a copy of the target function and the new target. |
| __ push(r1); |
| __ push(r3); |
| |
| // The function. |
| __ push(r1); |
| // Copy arguments from caller (stdlib, foreign, heap). |
| Label args_done; |
| for (int j = 0; j < 4; ++j) { |
| Label over; |
| if (j < 3) { |
| __ cmp(r4, Operand(j)); |
| __ b(ne, &over); |
| } |
| for (int i = j - 1; i >= 0; --i) { |
| __ ldr(r4, MemOperand(fp, StandardFrameConstants::kCallerSPOffset + |
| i * kPointerSize)); |
| __ push(r4); |
| } |
| for (int i = 0; i < 3 - j; ++i) { |
| __ PushRoot(Heap::kUndefinedValueRootIndex); |
| } |
| if (j < 3) { |
| __ jmp(&args_done); |
| __ bind(&over); |
| } |
| } |
| __ bind(&args_done); |
| |
| // Call runtime, on success unwind frame, and parent frame. |
| __ CallRuntime(Runtime::kInstantiateAsmJs, 4); |
| // A smi 0 is returned on failure, an object on success. |
| __ JumpIfSmi(r0, &failed); |
| |
| __ Drop(2); |
| __ pop(r4); |
| __ SmiUntag(r4); |
| scope.GenerateLeaveFrame(); |
| |
| __ add(r4, r4, Operand(1)); |
| __ Drop(r4); |
| __ Ret(); |
| |
| __ bind(&failed); |
| // Restore target function and new target. |
| __ pop(r3); |
| __ pop(r1); |
| __ pop(r0); |
| __ SmiUntag(r0); |
| } |
| // On failure, tail call back to regular js. |
| GenerateTailCallToReturnedCode(masm, Runtime::kCompileLazy); |
| } |
| |
| static void GenerateMakeCodeYoungAgainCommon(MacroAssembler* masm) { |
| // For now, we are relying on the fact that make_code_young doesn't do any |
| // garbage collection which allows us to save/restore the registers without |
| // worrying about which of them contain pointers. We also don't build an |
| // internal frame to make the code faster, since we shouldn't have to do stack |
| // crawls in MakeCodeYoung. This seems a bit fragile. |
| |
| // The following registers must be saved and restored when calling through to |
| // the runtime: |
| // r0 - contains return address (beginning of patch sequence) |
| // r1 - isolate |
| // r3 - new target |
| FrameScope scope(masm, StackFrame::MANUAL); |
| __ stm(db_w, sp, r0.bit() | r1.bit() | r3.bit() | fp.bit() | lr.bit()); |
| __ PrepareCallCFunction(2, 0, r2); |
| __ mov(r1, Operand(ExternalReference::isolate_address(masm->isolate()))); |
| __ CallCFunction( |
| ExternalReference::get_make_code_young_function(masm->isolate()), 2); |
| __ ldm(ia_w, sp, r0.bit() | r1.bit() | r3.bit() | fp.bit() | lr.bit()); |
| __ mov(pc, r0); |
| } |
| |
| #define DEFINE_CODE_AGE_BUILTIN_GENERATOR(C) \ |
| void Builtins::Generate_Make##C##CodeYoungAgain(MacroAssembler* masm) { \ |
| GenerateMakeCodeYoungAgainCommon(masm); \ |
| } |
| CODE_AGE_LIST(DEFINE_CODE_AGE_BUILTIN_GENERATOR) |
| #undef DEFINE_CODE_AGE_BUILTIN_GENERATOR |
| |
| void Builtins::Generate_MarkCodeAsExecutedOnce(MacroAssembler* masm) { |
| // For now, as in GenerateMakeCodeYoungAgainCommon, we are relying on the fact |
| // that make_code_young doesn't do any garbage collection which allows us to |
| // save/restore the registers without worrying about which of them contain |
| // pointers. |
| |
| // The following registers must be saved and restored when calling through to |
| // the runtime: |
| // r0 - contains return address (beginning of patch sequence) |
| // r1 - isolate |
| // r3 - new target |
| FrameScope scope(masm, StackFrame::MANUAL); |
| __ stm(db_w, sp, r0.bit() | r1.bit() | r3.bit() | fp.bit() | lr.bit()); |
| __ PrepareCallCFunction(2, 0, r2); |
| __ mov(r1, Operand(ExternalReference::isolate_address(masm->isolate()))); |
| __ CallCFunction( |
| ExternalReference::get_mark_code_as_executed_function(masm->isolate()), |
| 2); |
| __ ldm(ia_w, sp, r0.bit() | r1.bit() | r3.bit() | fp.bit() | lr.bit()); |
| |
| // Perform prologue operations usually performed by the young code stub. |
| __ PushStandardFrame(r1); |
| |
| // Jump to point after the code-age stub. |
| __ add(r0, r0, Operand(kNoCodeAgeSequenceLength)); |
| __ mov(pc, r0); |
| } |
| |
| void Builtins::Generate_MarkCodeAsExecutedTwice(MacroAssembler* masm) { |
| GenerateMakeCodeYoungAgainCommon(masm); |
| } |
| |
| void Builtins::Generate_MarkCodeAsToBeExecutedOnce(MacroAssembler* masm) { |
| Generate_MarkCodeAsExecutedOnce(masm); |
| } |
| |
| static void Generate_NotifyStubFailureHelper(MacroAssembler* masm, |
| SaveFPRegsMode save_doubles) { |
| { |
| FrameAndConstantPoolScope scope(masm, StackFrame::INTERNAL); |
| |
| // Preserve registers across notification, this is important for compiled |
| // stubs that tail call the runtime on deopts passing their parameters in |
| // registers. |
| __ stm(db_w, sp, kJSCallerSaved | kCalleeSaved); |
| // Pass the function and deoptimization type to the runtime system. |
| __ CallRuntime(Runtime::kNotifyStubFailure, save_doubles); |
| __ ldm(ia_w, sp, kJSCallerSaved | kCalleeSaved); |
| } |
| |
| __ add(sp, sp, Operand(kPointerSize)); // Ignore state |
| __ mov(pc, lr); // Jump to miss handler |
| } |
| |
| void Builtins::Generate_NotifyStubFailure(MacroAssembler* masm) { |
| Generate_NotifyStubFailureHelper(masm, kDontSaveFPRegs); |
| } |
| |
| void Builtins::Generate_NotifyStubFailureSaveDoubles(MacroAssembler* masm) { |
| Generate_NotifyStubFailureHelper(masm, kSaveFPRegs); |
| } |
| |
| static void Generate_NotifyDeoptimizedHelper(MacroAssembler* masm, |
| Deoptimizer::BailoutType type) { |
| { |
| FrameAndConstantPoolScope scope(masm, StackFrame::INTERNAL); |
| // Pass the function and deoptimization type to the runtime system. |
| __ mov(r0, Operand(Smi::FromInt(static_cast<int>(type)))); |
| __ push(r0); |
| __ CallRuntime(Runtime::kNotifyDeoptimized); |
| } |
| |
| // Get the full codegen state from the stack and untag it -> r6. |
| __ ldr(r6, MemOperand(sp, 0 * kPointerSize)); |
| __ SmiUntag(r6); |
| // Switch on the state. |
| Label with_tos_register, unknown_state; |
| __ cmp(r6, |
| Operand(static_cast<int>(Deoptimizer::BailoutState::NO_REGISTERS))); |
| __ b(ne, &with_tos_register); |
| __ add(sp, sp, Operand(1 * kPointerSize)); // Remove state. |
| __ Ret(); |
| |
| __ bind(&with_tos_register); |
| DCHECK_EQ(kInterpreterAccumulatorRegister.code(), r0.code()); |
| __ ldr(r0, MemOperand(sp, 1 * kPointerSize)); |
| __ cmp(r6, |
| Operand(static_cast<int>(Deoptimizer::BailoutState::TOS_REGISTER))); |
| __ b(ne, &unknown_state); |
| __ add(sp, sp, Operand(2 * kPointerSize)); // Remove state. |
| __ Ret(); |
| |
| __ bind(&unknown_state); |
| __ stop("no cases left"); |
| } |
| |
| void Builtins::Generate_NotifyDeoptimized(MacroAssembler* masm) { |
| Generate_NotifyDeoptimizedHelper(masm, Deoptimizer::EAGER); |
| } |
| |
| void Builtins::Generate_NotifySoftDeoptimized(MacroAssembler* masm) { |
| Generate_NotifyDeoptimizedHelper(masm, Deoptimizer::SOFT); |
| } |
| |
| void Builtins::Generate_NotifyLazyDeoptimized(MacroAssembler* masm) { |
| Generate_NotifyDeoptimizedHelper(masm, Deoptimizer::LAZY); |
| } |
| |
| static void CompatibleReceiverCheck(MacroAssembler* masm, Register receiver, |
| Register function_template_info, |
| Register scratch0, Register scratch1, |
| Register scratch2, |
| Label* receiver_check_failed) { |
| Register signature = scratch0; |
| Register map = scratch1; |
| Register constructor = scratch2; |
| |
| // If there is no signature, return the holder. |
| __ ldr(signature, FieldMemOperand(function_template_info, |
| FunctionTemplateInfo::kSignatureOffset)); |
| __ CompareRoot(signature, Heap::kUndefinedValueRootIndex); |
| Label receiver_check_passed; |
| __ b(eq, &receiver_check_passed); |
| |
| // Walk the prototype chain. |
| __ ldr(map, FieldMemOperand(receiver, HeapObject::kMapOffset)); |
| Label prototype_loop_start; |
| __ bind(&prototype_loop_start); |
| |
| // Get the constructor, if any. |
| __ GetMapConstructor(constructor, map, ip, ip); |
| __ cmp(ip, Operand(JS_FUNCTION_TYPE)); |
| Label next_prototype; |
| __ b(ne, &next_prototype); |
| Register type = constructor; |
| __ ldr(type, |
| FieldMemOperand(constructor, JSFunction::kSharedFunctionInfoOffset)); |
| __ ldr(type, FieldMemOperand(type, SharedFunctionInfo::kFunctionDataOffset)); |
| |
| // Loop through the chain of inheriting function templates. |
| Label function_template_loop; |
| __ bind(&function_template_loop); |
| |
| // If the signatures match, we have a compatible receiver. |
| __ cmp(signature, type); |
| __ b(eq, &receiver_check_passed); |
| |
| // If the current type is not a FunctionTemplateInfo, load the next prototype |
| // in the chain. |
| __ JumpIfSmi(type, &next_prototype); |
| __ CompareObjectType(type, ip, ip, FUNCTION_TEMPLATE_INFO_TYPE); |
| |
| // Otherwise load the parent function template and iterate. |
| __ ldr(type, |
| FieldMemOperand(type, FunctionTemplateInfo::kParentTemplateOffset), |
| eq); |
| __ b(&function_template_loop, eq); |
| |
| // Load the next prototype. |
| __ bind(&next_prototype); |
| __ ldr(ip, FieldMemOperand(map, Map::kBitField3Offset)); |
| __ tst(ip, Operand(Map::HasHiddenPrototype::kMask)); |
| __ b(eq, receiver_check_failed); |
| __ ldr(receiver, FieldMemOperand(map, Map::kPrototypeOffset)); |
| __ ldr(map, FieldMemOperand(receiver, HeapObject::kMapOffset)); |
| // Iterate. |
| __ b(&prototype_loop_start); |
| |
| __ bind(&receiver_check_passed); |
| } |
| |
| void Builtins::Generate_HandleFastApiCall(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- r0 : number of arguments excluding receiver |
| // -- r1 : callee |
| // -- lr : return address |
| // -- sp[0] : last argument |
| // -- ... |
| // -- sp[4 * (argc - 1)] : first argument |
| // -- sp[4 * argc] : receiver |
| // ----------------------------------- |
| |
| // Load the FunctionTemplateInfo. |
| __ ldr(r3, FieldMemOperand(r1, JSFunction::kSharedFunctionInfoOffset)); |
| __ ldr(r3, FieldMemOperand(r3, SharedFunctionInfo::kFunctionDataOffset)); |
| |
| // Do the compatible receiver check. |
| Label receiver_check_failed; |
| __ ldr(r2, MemOperand(sp, r0, LSL, kPointerSizeLog2)); |
| CompatibleReceiverCheck(masm, r2, r3, r4, r5, r6, &receiver_check_failed); |
| |
| // Get the callback offset from the FunctionTemplateInfo, and jump to the |
| // beginning of the code. |
| __ ldr(r4, FieldMemOperand(r3, FunctionTemplateInfo::kCallCodeOffset)); |
| __ ldr(r4, FieldMemOperand(r4, CallHandlerInfo::kFastHandlerOffset)); |
| __ add(r4, r4, Operand(Code::kHeaderSize - kHeapObjectTag)); |
| __ Jump(r4); |
| |
| // Compatible receiver check failed: throw an Illegal Invocation exception. |
| __ bind(&receiver_check_failed); |
| // Drop the arguments (including the receiver) |
| __ add(r0, r0, Operand(1)); |
| __ add(sp, sp, Operand(r0, LSL, kPointerSizeLog2)); |
| __ TailCallRuntime(Runtime::kThrowIllegalInvocation); |
| } |
| |
| static void Generate_OnStackReplacementHelper(MacroAssembler* masm, |
| bool has_handler_frame) { |
| // Lookup the function in the JavaScript frame. |
| if (has_handler_frame) { |
| __ ldr(r0, MemOperand(fp, StandardFrameConstants::kCallerFPOffset)); |
| __ ldr(r0, MemOperand(r0, JavaScriptFrameConstants::kFunctionOffset)); |
| } else { |
| __ ldr(r0, MemOperand(fp, JavaScriptFrameConstants::kFunctionOffset)); |
| } |
| |
| { |
| FrameAndConstantPoolScope scope(masm, StackFrame::INTERNAL); |
| // Pass function as argument. |
| __ push(r0); |
| __ CallRuntime(Runtime::kCompileForOnStackReplacement); |
| } |
| |
| // If the code object is null, just return to the caller. |
| Label skip; |
| __ cmp(r0, Operand(Smi::kZero)); |
| __ b(ne, &skip); |
| __ Ret(); |
| |
| __ bind(&skip); |
| |
| // Drop any potential handler frame that is be sitting on top of the actual |
| // JavaScript frame. This is the case then OSR is triggered from bytecode. |
| if (has_handler_frame) { |
| __ LeaveFrame(StackFrame::STUB); |
| } |
| |
| // Load deoptimization data from the code object. |
| // <deopt_data> = <code>[#deoptimization_data_offset] |
| __ ldr(r1, FieldMemOperand(r0, Code::kDeoptimizationDataOffset)); |
| |
| { |
| ConstantPoolUnavailableScope constant_pool_unavailable(masm); |
| __ add(r0, r0, Operand(Code::kHeaderSize - kHeapObjectTag)); // Code start |
| |
| if (FLAG_enable_embedded_constant_pool) { |
| __ LoadConstantPoolPointerRegisterFromCodeTargetAddress(r0); |
| } |
| |
| // Load the OSR entrypoint offset from the deoptimization data. |
| // <osr_offset> = <deopt_data>[#header_size + #osr_pc_offset] |
| __ ldr(r1, FieldMemOperand( |
| r1, FixedArray::OffsetOfElementAt( |
| DeoptimizationInputData::kOsrPcOffsetIndex))); |
| |
| // Compute the target address = code start + osr_offset |
| __ add(lr, r0, Operand::SmiUntag(r1)); |
| |
| // And "return" to the OSR entry point of the function. |
| __ Ret(); |
| } |
| } |
| |
| void Builtins::Generate_OnStackReplacement(MacroAssembler* masm) { |
| Generate_OnStackReplacementHelper(masm, false); |
| } |
| |
| void Builtins::Generate_InterpreterOnStackReplacement(MacroAssembler* masm) { |
| Generate_OnStackReplacementHelper(masm, true); |
| } |
| |
| // static |
| void Builtins::Generate_FunctionPrototypeApply(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- r0 : argc |
| // -- sp[0] : argArray |
| // -- sp[4] : thisArg |
| // -- sp[8] : receiver |
| // ----------------------------------- |
| |
| // 1. Load receiver into r1, argArray into r0 (if present), remove all |
| // arguments from the stack (including the receiver), and push thisArg (if |
| // present) instead. |
| { |
| __ LoadRoot(r2, Heap::kUndefinedValueRootIndex); |
| __ mov(r3, r2); |
| __ ldr(r1, MemOperand(sp, r0, LSL, kPointerSizeLog2)); // receiver |
| __ sub(r4, r0, Operand(1), SetCC); |
| __ ldr(r2, MemOperand(sp, r4, LSL, kPointerSizeLog2), ge); // thisArg |
| __ sub(r4, r4, Operand(1), SetCC, ge); |
| __ ldr(r3, MemOperand(sp, r4, LSL, kPointerSizeLog2), ge); // argArray |
| __ add(sp, sp, Operand(r0, LSL, kPointerSizeLog2)); |
| __ str(r2, MemOperand(sp, 0)); |
| __ mov(r0, r3); |
| } |
| |
| // ----------- S t a t e ------------- |
| // -- r0 : argArray |
| // -- r1 : receiver |
| // -- sp[0] : thisArg |
| // ----------------------------------- |
| |
| // 2. Make sure the receiver is actually callable. |
| Label receiver_not_callable; |
| __ JumpIfSmi(r1, &receiver_not_callable); |
| __ ldr(r4, FieldMemOperand(r1, HeapObject::kMapOffset)); |
| __ ldrb(r4, FieldMemOperand(r4, Map::kBitFieldOffset)); |
| __ tst(r4, Operand(1 << Map::kIsCallable)); |
| __ b(eq, &receiver_not_callable); |
| |
| // 3. Tail call with no arguments if argArray is null or undefined. |
| Label no_arguments; |
| __ JumpIfRoot(r0, Heap::kNullValueRootIndex, &no_arguments); |
| __ JumpIfRoot(r0, Heap::kUndefinedValueRootIndex, &no_arguments); |
| |
| // 4a. Apply the receiver to the given argArray (passing undefined for |
| // new.target). |
| __ LoadRoot(r3, Heap::kUndefinedValueRootIndex); |
| __ Jump(masm->isolate()->builtins()->Apply(), RelocInfo::CODE_TARGET); |
| |
| // 4b. The argArray is either null or undefined, so we tail call without any |
| // arguments to the receiver. |
| __ bind(&no_arguments); |
| { |
| __ mov(r0, Operand(0)); |
| __ Jump(masm->isolate()->builtins()->Call(), RelocInfo::CODE_TARGET); |
| } |
| |
| // 4c. The receiver is not callable, throw an appropriate TypeError. |
| __ bind(&receiver_not_callable); |
| { |
| __ str(r1, MemOperand(sp, 0)); |
| __ TailCallRuntime(Runtime::kThrowApplyNonFunction); |
| } |
| } |
| |
| // static |
| void Builtins::Generate_FunctionPrototypeCall(MacroAssembler* masm) { |
| // 1. Make sure we have at least one argument. |
| // r0: actual number of arguments |
| { |
| Label done; |
| __ cmp(r0, Operand::Zero()); |
| __ b(ne, &done); |
| __ PushRoot(Heap::kUndefinedValueRootIndex); |
| __ add(r0, r0, Operand(1)); |
| __ bind(&done); |
| } |
| |
| // 2. Get the callable to call (passed as receiver) from the stack. |
| // r0: actual number of arguments |
| __ ldr(r1, MemOperand(sp, r0, LSL, kPointerSizeLog2)); |
| |
| // 3. Shift arguments and return address one slot down on the stack |
| // (overwriting the original receiver). Adjust argument count to make |
| // the original first argument the new receiver. |
| // r0: actual number of arguments |
| // r1: callable |
| { |
| Label loop; |
| // Calculate the copy start address (destination). Copy end address is sp. |
| __ add(r2, sp, Operand(r0, LSL, kPointerSizeLog2)); |
| |
| __ bind(&loop); |
| __ ldr(ip, MemOperand(r2, -kPointerSize)); |
| __ str(ip, MemOperand(r2)); |
| __ sub(r2, r2, Operand(kPointerSize)); |
| __ cmp(r2, sp); |
| __ b(ne, &loop); |
| // Adjust the actual number of arguments and remove the top element |
| // (which is a copy of the last argument). |
| __ sub(r0, r0, Operand(1)); |
| __ pop(); |
| } |
| |
| // 4. Call the callable. |
| __ Jump(masm->isolate()->builtins()->Call(), RelocInfo::CODE_TARGET); |
| } |
| |
| void Builtins::Generate_ReflectApply(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- r0 : argc |
| // -- sp[0] : argumentsList |
| // -- sp[4] : thisArgument |
| // -- sp[8] : target |
| // -- sp[12] : receiver |
| // ----------------------------------- |
| |
| // 1. Load target into r1 (if present), argumentsList into r0 (if present), |
| // remove all arguments from the stack (including the receiver), and push |
| // thisArgument (if present) instead. |
| { |
| __ LoadRoot(r1, Heap::kUndefinedValueRootIndex); |
| __ mov(r2, r1); |
| __ mov(r3, r1); |
| __ sub(r4, r0, Operand(1), SetCC); |
| __ ldr(r1, MemOperand(sp, r4, LSL, kPointerSizeLog2), ge); // target |
| __ sub(r4, r4, Operand(1), SetCC, ge); |
| __ ldr(r2, MemOperand(sp, r4, LSL, kPointerSizeLog2), ge); // thisArgument |
| __ sub(r4, r4, Operand(1), SetCC, ge); |
| __ ldr(r3, MemOperand(sp, r4, LSL, kPointerSizeLog2), ge); // argumentsList |
| __ add(sp, sp, Operand(r0, LSL, kPointerSizeLog2)); |
| __ str(r2, MemOperand(sp, 0)); |
| __ mov(r0, r3); |
| } |
| |
| // ----------- S t a t e ------------- |
| // -- r0 : argumentsList |
| // -- r1 : target |
| // -- sp[0] : thisArgument |
| // ----------------------------------- |
| |
| // 2. Make sure the target is actually callable. |
| Label target_not_callable; |
| __ JumpIfSmi(r1, &target_not_callable); |
| __ ldr(r4, FieldMemOperand(r1, HeapObject::kMapOffset)); |
| __ ldrb(r4, FieldMemOperand(r4, Map::kBitFieldOffset)); |
| __ tst(r4, Operand(1 << Map::kIsCallable)); |
| __ b(eq, &target_not_callable); |
| |
| // 3a. Apply the target to the given argumentsList (passing undefined for |
| // new.target). |
| __ LoadRoot(r3, Heap::kUndefinedValueRootIndex); |
| __ Jump(masm->isolate()->builtins()->Apply(), RelocInfo::CODE_TARGET); |
| |
| // 3b. The target is not callable, throw an appropriate TypeError. |
| __ bind(&target_not_callable); |
| { |
| __ str(r1, MemOperand(sp, 0)); |
| __ TailCallRuntime(Runtime::kThrowApplyNonFunction); |
| } |
| } |
| |
| void Builtins::Generate_ReflectConstruct(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- r0 : argc |
| // -- sp[0] : new.target (optional) |
| // -- sp[4] : argumentsList |
| // -- sp[8] : target |
| // -- sp[12] : receiver |
| // ----------------------------------- |
| |
| // 1. Load target into r1 (if present), argumentsList into r0 (if present), |
| // new.target into r3 (if present, otherwise use target), remove all |
| // arguments from the stack (including the receiver), and push thisArgument |
| // (if present) instead. |
| { |
| __ LoadRoot(r1, Heap::kUndefinedValueRootIndex); |
| __ mov(r2, r1); |
| __ str(r2, MemOperand(sp, r0, LSL, kPointerSizeLog2)); // receiver |
| __ sub(r4, r0, Operand(1), SetCC); |
| __ ldr(r1, MemOperand(sp, r4, LSL, kPointerSizeLog2), ge); // target |
| __ mov(r3, r1); // new.target defaults to target |
| __ sub(r4, r4, Operand(1), SetCC, ge); |
| __ ldr(r2, MemOperand(sp, r4, LSL, kPointerSizeLog2), ge); // argumentsList |
| __ sub(r4, r4, Operand(1), SetCC, ge); |
| __ ldr(r3, MemOperand(sp, r4, LSL, kPointerSizeLog2), ge); // new.target |
| __ add(sp, sp, Operand(r0, LSL, kPointerSizeLog2)); |
| __ mov(r0, r2); |
| } |
| |
| // ----------- S t a t e ------------- |
| // -- r0 : argumentsList |
| // -- r3 : new.target |
| // -- r1 : target |
| // -- sp[0] : receiver (undefined) |
| // ----------------------------------- |
| |
| // 2. Make sure the target is actually a constructor. |
| Label target_not_constructor; |
| __ JumpIfSmi(r1, &target_not_constructor); |
| __ ldr(r4, FieldMemOperand(r1, HeapObject::kMapOffset)); |
| __ ldrb(r4, FieldMemOperand(r4, Map::kBitFieldOffset)); |
| __ tst(r4, Operand(1 << Map::kIsConstructor)); |
| __ b(eq, &target_not_constructor); |
| |
| // 3. Make sure the target is actually a constructor. |
| Label new_target_not_constructor; |
| __ JumpIfSmi(r3, &new_target_not_constructor); |
| __ ldr(r4, FieldMemOperand(r3, HeapObject::kMapOffset)); |
| __ ldrb(r4, FieldMemOperand(r4, Map::kBitFieldOffset)); |
| __ tst(r4, Operand(1 << Map::kIsConstructor)); |
| __ b(eq, &new_target_not_constructor); |
| |
| // 4a. Construct the target with the given new.target and argumentsList. |
| __ Jump(masm->isolate()->builtins()->Apply(), RelocInfo::CODE_TARGET); |
| |
| // 4b. The target is not a constructor, throw an appropriate TypeError. |
| __ bind(&target_not_constructor); |
| { |
| __ str(r1, MemOperand(sp, 0)); |
| __ TailCallRuntime(Runtime::kThrowCalledNonCallable); |
| } |
| |
| // 4c. The new.target is not a constructor, throw an appropriate TypeError. |
| __ bind(&new_target_not_constructor); |
| { |
| __ str(r3, MemOperand(sp, 0)); |
| __ TailCallRuntime(Runtime::kThrowCalledNonCallable); |
| } |
| } |
| |
| static void EnterArgumentsAdaptorFrame(MacroAssembler* masm) { |
| __ SmiTag(r0); |
| __ mov(r4, Operand(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR))); |
| __ stm(db_w, sp, r0.bit() | r1.bit() | r4.bit() | |
| (FLAG_enable_embedded_constant_pool ? pp.bit() : 0) | |
| fp.bit() | lr.bit()); |
| __ add(fp, sp, |
| Operand(StandardFrameConstants::kFixedFrameSizeFromFp + kPointerSize)); |
| } |
| |
| static void LeaveArgumentsAdaptorFrame(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- r0 : result being passed through |
| // ----------------------------------- |
| // Get the number of arguments passed (as a smi), tear down the frame and |
| // then tear down the parameters. |
| __ ldr(r1, MemOperand(fp, -(StandardFrameConstants::kFixedFrameSizeFromFp + |
| kPointerSize))); |
| |
| __ LeaveFrame(StackFrame::ARGUMENTS_ADAPTOR); |
| __ add(sp, sp, Operand::PointerOffsetFromSmiKey(r1)); |
| __ add(sp, sp, Operand(kPointerSize)); // adjust for receiver |
| } |
| |
| // static |
| void Builtins::Generate_Apply(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- r0 : argumentsList |
| // -- r1 : target |
| // -- r3 : new.target (checked to be constructor or undefined) |
| // -- sp[0] : thisArgument |
| // ----------------------------------- |
| |
| // Create the list of arguments from the array-like argumentsList. |
| { |
| Label create_arguments, create_array, create_holey_array, create_runtime, |
| done_create; |
| __ JumpIfSmi(r0, &create_runtime); |
| |
| // Load the map of argumentsList into r2. |
| __ ldr(r2, FieldMemOperand(r0, HeapObject::kMapOffset)); |
| |
| // Load native context into r4. |
| __ ldr(r4, NativeContextMemOperand()); |
| |
| // Check if argumentsList is an (unmodified) arguments object. |
| __ ldr(ip, ContextMemOperand(r4, Context::SLOPPY_ARGUMENTS_MAP_INDEX)); |
| __ cmp(ip, r2); |
| __ b(eq, &create_arguments); |
| __ ldr(ip, ContextMemOperand(r4, Context::STRICT_ARGUMENTS_MAP_INDEX)); |
| __ cmp(ip, r2); |
| __ b(eq, &create_arguments); |
| |
| // Check if argumentsList is a fast JSArray. |
| __ CompareInstanceType(r2, ip, JS_ARRAY_TYPE); |
| __ b(eq, &create_array); |
| |
| // Ask the runtime to create the list (actually a FixedArray). |
| __ bind(&create_runtime); |
| { |
| FrameAndConstantPoolScope scope(masm, StackFrame::INTERNAL); |
| __ Push(r1, r3, r0); |
| __ CallRuntime(Runtime::kCreateListFromArrayLike); |
| __ Pop(r1, r3); |
| __ ldr(r2, FieldMemOperand(r0, FixedArray::kLengthOffset)); |
| __ SmiUntag(r2); |
| } |
| __ jmp(&done_create); |
| |
| // Try to create the list from an arguments object. |
| __ bind(&create_arguments); |
| __ ldr(r2, FieldMemOperand(r0, JSArgumentsObject::kLengthOffset)); |
| __ ldr(r4, FieldMemOperand(r0, JSObject::kElementsOffset)); |
| __ ldr(ip, FieldMemOperand(r4, FixedArray::kLengthOffset)); |
| __ cmp(r2, ip); |
| __ b(ne, &create_runtime); |
| __ SmiUntag(r2); |
| __ mov(r0, r4); |
| __ b(&done_create); |
| |
| // For holey JSArrays we need to check that the array prototype chain |
| // protector is intact and our prototype is the Array.prototype actually. |
| __ bind(&create_holey_array); |
| __ ldr(r2, FieldMemOperand(r2, Map::kPrototypeOffset)); |
| __ ldr(r4, ContextMemOperand(r4, Context::INITIAL_ARRAY_PROTOTYPE_INDEX)); |
| __ cmp(r2, r4); |
| __ b(ne, &create_runtime); |
| __ LoadRoot(r4, Heap::kArrayProtectorRootIndex); |
| __ ldr(r2, FieldMemOperand(r4, PropertyCell::kValueOffset)); |
| __ cmp(r2, Operand(Smi::FromInt(Isolate::kProtectorValid))); |
| __ b(ne, &create_runtime); |
| __ ldr(r2, FieldMemOperand(r0, JSArray::kLengthOffset)); |
| __ ldr(r0, FieldMemOperand(r0, JSArray::kElementsOffset)); |
| __ SmiUntag(r2); |
| __ b(&done_create); |
| |
| // Try to create the list from a JSArray object. |
| // -- r2 and r4 must be preserved till bne create_holey_array. |
| __ bind(&create_array); |
| __ ldr(r5, FieldMemOperand(r2, Map::kBitField2Offset)); |
| __ DecodeField<Map::ElementsKindBits>(r5); |
| STATIC_ASSERT(FAST_SMI_ELEMENTS == 0); |
| STATIC_ASSERT(FAST_HOLEY_SMI_ELEMENTS == 1); |
| STATIC_ASSERT(FAST_ELEMENTS == 2); |
| STATIC_ASSERT(FAST_HOLEY_ELEMENTS == 3); |
| __ cmp(r5, Operand(FAST_HOLEY_ELEMENTS)); |
| __ b(hi, &create_runtime); |
| // Only FAST_XXX after this point, FAST_HOLEY_XXX are odd values. |
| __ tst(r5, Operand(1)); |
| __ b(ne, &create_holey_array); |
| // FAST_SMI_ELEMENTS or FAST_ELEMENTS after this point. |
| __ ldr(r2, FieldMemOperand(r0, JSArray::kLengthOffset)); |
| __ ldr(r0, FieldMemOperand(r0, JSArray::kElementsOffset)); |
| __ SmiUntag(r2); |
| |
| __ bind(&done_create); |
| } |
| |
| // Check for stack overflow. |
| { |
| // Check the stack for overflow. We are not trying to catch interruptions |
| // (i.e. debug break and preemption) here, so check the "real stack limit". |
| Label done; |
| __ LoadRoot(ip, Heap::kRealStackLimitRootIndex); |
| // Make ip the space we have left. The stack might already be overflowed |
| // here which will cause ip to become negative. |
| __ sub(ip, sp, ip); |
| // Check if the arguments will overflow the stack. |
| __ cmp(ip, Operand(r2, LSL, kPointerSizeLog2)); |
| __ b(gt, &done); // Signed comparison. |
| __ TailCallRuntime(Runtime::kThrowStackOverflow); |
| __ bind(&done); |
| } |
| |
| // ----------- S t a t e ------------- |
| // -- r1 : target |
| // -- r0 : args (a FixedArray built from argumentsList) |
| // -- r2 : len (number of elements to push from args) |
| // -- r3 : new.target (checked to be constructor or undefined) |
| // -- sp[0] : thisArgument |
| // ----------------------------------- |
| |
| // Push arguments onto the stack (thisArgument is already on the stack). |
| { |
| __ mov(r4, Operand(0)); |
| __ LoadRoot(r5, Heap::kTheHoleValueRootIndex); |
| __ LoadRoot(r6, Heap::kUndefinedValueRootIndex); |
| Label done, loop; |
| __ bind(&loop); |
| __ cmp(r4, r2); |
| __ b(eq, &done); |
| __ add(ip, r0, Operand(r4, LSL, kPointerSizeLog2)); |
| __ ldr(ip, FieldMemOperand(ip, FixedArray::kHeaderSize)); |
| __ cmp(r5, ip); |
| __ mov(ip, r6, LeaveCC, eq); |
| __ Push(ip); |
| __ add(r4, r4, Operand(1)); |
| __ b(&loop); |
| __ bind(&done); |
| __ Move(r0, r4); |
| } |
| |
| // Dispatch to Call or Construct depending on whether new.target is undefined. |
| { |
| __ CompareRoot(r3, Heap::kUndefinedValueRootIndex); |
| __ Jump(masm->isolate()->builtins()->Call(), RelocInfo::CODE_TARGET, eq); |
| __ Jump(masm->isolate()->builtins()->Construct(), RelocInfo::CODE_TARGET); |
| } |
| } |
| |
| namespace { |
| |
| // Drops top JavaScript frame and an arguments adaptor frame below it (if |
| // present) preserving all the arguments prepared for current call. |
| // Does nothing if debugger is currently active. |
| // ES6 14.6.3. PrepareForTailCall |
| // |
| // Stack structure for the function g() tail calling f(): |
| // |
| // ------- Caller frame: ------- |
| // | ... |
| // | g()'s arg M |
| // | ... |
| // | g()'s arg 1 |
| // | g()'s receiver arg |
| // | g()'s caller pc |
| // ------- g()'s frame: ------- |
| // | g()'s caller fp <- fp |
| // | g()'s context |
| // | function pointer: g |
| // | ------------------------- |
| // | ... |
| // | ... |
| // | f()'s arg N |
| // | ... |
| // | f()'s arg 1 |
| // | f()'s receiver arg <- sp (f()'s caller pc is not on the stack yet!) |
| // ---------------------- |
| // |
| void PrepareForTailCall(MacroAssembler* masm, Register args_reg, |
| Register scratch1, Register scratch2, |
| Register scratch3) { |
| DCHECK(!AreAliased(args_reg, scratch1, scratch2, scratch3)); |
| Comment cmnt(masm, "[ PrepareForTailCall"); |
| |
| // Prepare for tail call only if ES2015 tail call elimination is enabled. |
| Label done; |
| ExternalReference is_tail_call_elimination_enabled = |
| ExternalReference::is_tail_call_elimination_enabled_address( |
| masm->isolate()); |
| __ mov(scratch1, Operand(is_tail_call_elimination_enabled)); |
| __ ldrb(scratch1, MemOperand(scratch1)); |
| __ cmp(scratch1, Operand(0)); |
| __ b(eq, &done); |
| |
| // Drop possible interpreter handler/stub frame. |
| { |
| Label no_interpreter_frame; |
| __ ldr(scratch3, |
| MemOperand(fp, CommonFrameConstants::kContextOrFrameTypeOffset)); |
| __ cmp(scratch3, Operand(Smi::FromInt(StackFrame::STUB))); |
| __ b(ne, &no_interpreter_frame); |
| __ ldr(fp, MemOperand(fp, StandardFrameConstants::kCallerFPOffset)); |
| __ bind(&no_interpreter_frame); |
| } |
| |
| // Check if next frame is an arguments adaptor frame. |
| Register caller_args_count_reg = scratch1; |
| Label no_arguments_adaptor, formal_parameter_count_loaded; |
| __ ldr(scratch2, MemOperand(fp, StandardFrameConstants::kCallerFPOffset)); |
| __ ldr(scratch3, |
| MemOperand(scratch2, CommonFrameConstants::kContextOrFrameTypeOffset)); |
| __ cmp(scratch3, Operand(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR))); |
| __ b(ne, &no_arguments_adaptor); |
| |
| // Drop current frame and load arguments count from arguments adaptor frame. |
| __ mov(fp, scratch2); |
| __ ldr(caller_args_count_reg, |
| MemOperand(fp, ArgumentsAdaptorFrameConstants::kLengthOffset)); |
| __ SmiUntag(caller_args_count_reg); |
| __ b(&formal_parameter_count_loaded); |
| |
| __ bind(&no_arguments_adaptor); |
| // Load caller's formal parameter count |
| __ ldr(scratch1, |
| MemOperand(fp, ArgumentsAdaptorFrameConstants::kFunctionOffset)); |
| __ ldr(scratch1, |
| FieldMemOperand(scratch1, JSFunction::kSharedFunctionInfoOffset)); |
| __ ldr(caller_args_count_reg, |
| FieldMemOperand(scratch1, |
| SharedFunctionInfo::kFormalParameterCountOffset)); |
| __ SmiUntag(caller_args_count_reg); |
| |
| __ bind(&formal_parameter_count_loaded); |
| |
| ParameterCount callee_args_count(args_reg); |
| __ PrepareForTailCall(callee_args_count, caller_args_count_reg, scratch2, |
| scratch3); |
| __ bind(&done); |
| } |
| } // namespace |
| |
| // static |
| void Builtins::Generate_CallFunction(MacroAssembler* masm, |
| ConvertReceiverMode mode, |
| TailCallMode tail_call_mode) { |
| // ----------- S t a t e ------------- |
| // -- r0 : the number of arguments (not including the receiver) |
| // -- r1 : the function to call (checked to be a JSFunction) |
| // ----------------------------------- |
| __ AssertFunction(r1); |
| |
| // See ES6 section 9.2.1 [[Call]] ( thisArgument, argumentsList) |
| // Check that the function is not a "classConstructor". |
| Label class_constructor; |
| __ ldr(r2, FieldMemOperand(r1, JSFunction::kSharedFunctionInfoOffset)); |
| __ ldrb(r3, FieldMemOperand(r2, SharedFunctionInfo::kFunctionKindByteOffset)); |
| __ tst(r3, Operand(SharedFunctionInfo::kClassConstructorBitsWithinByte)); |
| __ b(ne, &class_constructor); |
| |
| // Enter the context of the function; ToObject has to run in the function |
| // context, and we also need to take the global proxy from the function |
| // context in case of conversion. |
| STATIC_ASSERT(SharedFunctionInfo::kNativeByteOffset == |
| SharedFunctionInfo::kStrictModeByteOffset); |
| __ ldr(cp, FieldMemOperand(r1, JSFunction::kContextOffset)); |
| // We need to convert the receiver for non-native sloppy mode functions. |
| Label done_convert; |
| __ ldrb(r3, FieldMemOperand(r2, SharedFunctionInfo::kNativeByteOffset)); |
| __ tst(r3, Operand((1 << SharedFunctionInfo::kNativeBitWithinByte) | |
| (1 << SharedFunctionInfo::kStrictModeBitWithinByte))); |
| __ b(ne, &done_convert); |
| { |
| // ----------- S t a t e ------------- |
| // -- r0 : the number of arguments (not including the receiver) |
| // -- r1 : the function to call (checked to be a JSFunction) |
| // -- r2 : the shared function info. |
| // -- cp : the function context. |
| // ----------------------------------- |
| |
| if (mode == ConvertReceiverMode::kNullOrUndefined) { |
| // Patch receiver to global proxy. |
| __ LoadGlobalProxy(r3); |
| } else { |
| Label convert_to_object, convert_receiver; |
| __ ldr(r3, MemOperand(sp, r0, LSL, kPointerSizeLog2)); |
| __ JumpIfSmi(r3, &convert_to_object); |
| STATIC_ASSERT(LAST_JS_RECEIVER_TYPE == LAST_TYPE); |
| __ CompareObjectType(r3, r4, r4, FIRST_JS_RECEIVER_TYPE); |
| __ b(hs, &done_convert); |
| if (mode != ConvertReceiverMode::kNotNullOrUndefined) { |
| Label convert_global_proxy; |
| __ JumpIfRoot(r3, Heap::kUndefinedValueRootIndex, |
| &convert_global_proxy); |
| __ JumpIfNotRoot(r3, Heap::kNullValueRootIndex, &convert_to_object); |
| __ bind(&convert_global_proxy); |
| { |
| // Patch receiver to global proxy. |
| __ LoadGlobalProxy(r3); |
| } |
| __ b(&convert_receiver); |
| } |
| __ bind(&convert_to_object); |
| { |
| // Convert receiver using ToObject. |
| // TODO(bmeurer): Inline the allocation here to avoid building the frame |
| // in the fast case? (fall back to AllocateInNewSpace?) |
| FrameAndConstantPoolScope scope(masm, StackFrame::INTERNAL); |
| __ SmiTag(r0); |
| __ Push(r0, r1); |
| __ mov(r0, r3); |
| __ Push(cp); |
| __ Call(masm->isolate()->builtins()->ToObject(), |
| RelocInfo::CODE_TARGET); |
| __ Pop(cp); |
| __ mov(r3, r0); |
| __ Pop(r0, r1); |
| __ SmiUntag(r0); |
| } |
| __ ldr(r2, FieldMemOperand(r1, JSFunction::kSharedFunctionInfoOffset)); |
| __ bind(&convert_receiver); |
| } |
| __ str(r3, MemOperand(sp, r0, LSL, kPointerSizeLog2)); |
| } |
| __ bind(&done_convert); |
| |
| // ----------- S t a t e ------------- |
| // -- r0 : the number of arguments (not including the receiver) |
| // -- r1 : the function to call (checked to be a JSFunction) |
| // -- r2 : the shared function info. |
| // -- cp : the function context. |
| // ----------------------------------- |
| |
| if (tail_call_mode == TailCallMode::kAllow) { |
| PrepareForTailCall(masm, r0, r3, r4, r5); |
| } |
| |
| __ ldr(r2, |
| FieldMemOperand(r2, SharedFunctionInfo::kFormalParameterCountOffset)); |
| __ SmiUntag(r2); |
| ParameterCount actual(r0); |
| ParameterCount expected(r2); |
| __ InvokeFunctionCode(r1, no_reg, expected, actual, JUMP_FUNCTION, |
| CheckDebugStepCallWrapper()); |
| |
| // The function is a "classConstructor", need to raise an exception. |
| __ bind(&class_constructor); |
| { |
| FrameScope frame(masm, StackFrame::INTERNAL); |
| __ push(r1); |
| __ CallRuntime(Runtime::kThrowConstructorNonCallableError); |
| } |
| } |
| |
| namespace { |
| |
| void Generate_PushBoundArguments(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- r0 : the number of arguments (not including the receiver) |
| // -- r1 : target (checked to be a JSBoundFunction) |
| // -- r3 : new.target (only in case of [[Construct]]) |
| // ----------------------------------- |
| |
| // Load [[BoundArguments]] into r2 and length of that into r4. |
| Label no_bound_arguments; |
| __ ldr(r2, FieldMemOperand(r1, JSBoundFunction::kBoundArgumentsOffset)); |
| __ ldr(r4, FieldMemOperand(r2, FixedArray::kLengthOffset)); |
| __ SmiUntag(r4); |
| __ cmp(r4, Operand(0)); |
| __ b(eq, &no_bound_arguments); |
| { |
| // ----------- S t a t e ------------- |
| // -- r0 : the number of arguments (not including the receiver) |
| // -- r1 : target (checked to be a JSBoundFunction) |
| // -- r2 : the [[BoundArguments]] (implemented as FixedArray) |
| // -- r3 : new.target (only in case of [[Construct]]) |
| // -- r4 : the number of [[BoundArguments]] |
| // ----------------------------------- |
| |
| // Reserve stack space for the [[BoundArguments]]. |
| { |
| Label done; |
| __ sub(sp, sp, Operand(r4, LSL, kPointerSizeLog2)); |
| // Check the stack for overflow. We are not trying to catch interruptions |
| // (i.e. debug break and preemption) here, so check the "real stack |
| // limit". |
| __ CompareRoot(sp, Heap::kRealStackLimitRootIndex); |
| __ b(gt, &done); // Signed comparison. |
| // Restore the stack pointer. |
| __ add(sp, sp, Operand(r4, LSL, kPointerSizeLog2)); |
| { |
| FrameScope scope(masm, StackFrame::MANUAL); |
| __ EnterFrame(StackFrame::INTERNAL); |
| __ CallRuntime(Runtime::kThrowStackOverflow); |
| } |
| __ bind(&done); |
| } |
| |
| // Relocate arguments down the stack. |
| { |
| Label loop, done_loop; |
| __ mov(r5, Operand(0)); |
| __ bind(&loop); |
| __ cmp(r5, r0); |
| __ b(gt, &done_loop); |
| __ ldr(ip, MemOperand(sp, r4, LSL, kPointerSizeLog2)); |
| __ str(ip, MemOperand(sp, r5, LSL, kPointerSizeLog2)); |
| __ add(r4, r4, Operand(1)); |
| __ add(r5, r5, Operand(1)); |
| __ b(&loop); |
| __ bind(&done_loop); |
| } |
| |
| // Copy [[BoundArguments]] to the stack (below the arguments). |
| { |
| Label loop; |
| __ ldr(r4, FieldMemOperand(r2, FixedArray::kLengthOffset)); |
| __ SmiUntag(r4); |
| __ add(r2, r2, Operand(FixedArray::kHeaderSize - kHeapObjectTag)); |
| __ bind(&loop); |
| __ sub(r4, r4, Operand(1), SetCC); |
| __ ldr(ip, MemOperand(r2, r4, LSL, kPointerSizeLog2)); |
| __ str(ip, MemOperand(sp, r0, LSL, kPointerSizeLog2)); |
| __ add(r0, r0, Operand(1)); |
| __ b(gt, &loop); |
| } |
| } |
| __ bind(&no_bound_arguments); |
| } |
| |
| } // namespace |
| |
| // static |
| void Builtins::Generate_CallBoundFunctionImpl(MacroAssembler* masm, |
| TailCallMode tail_call_mode) { |
| // ----------- S t a t e ------------- |
| // -- r0 : the number of arguments (not including the receiver) |
| // -- r1 : the function to call (checked to be a JSBoundFunction) |
| // ----------------------------------- |
| __ AssertBoundFunction(r1); |
| |
| if (tail_call_mode == TailCallMode::kAllow) { |
| PrepareForTailCall(masm, r0, r3, r4, r5); |
| } |
| |
| // Patch the receiver to [[BoundThis]]. |
| __ ldr(ip, FieldMemOperand(r1, JSBoundFunction::kBoundThisOffset)); |
| __ str(ip, MemOperand(sp, r0, LSL, kPointerSizeLog2)); |
| |
| // Push the [[BoundArguments]] onto the stack. |
| Generate_PushBoundArguments(masm); |
| |
| // Call the [[BoundTargetFunction]] via the Call builtin. |
| __ ldr(r1, FieldMemOperand(r1, JSBoundFunction::kBoundTargetFunctionOffset)); |
| __ mov(ip, Operand(ExternalReference(Builtins::kCall_ReceiverIsAny, |
| masm->isolate()))); |
| __ ldr(ip, MemOperand(ip)); |
| __ add(pc, ip, Operand(Code::kHeaderSize - kHeapObjectTag)); |
| } |
| |
| // static |
| void Builtins::Generate_Call(MacroAssembler* masm, ConvertReceiverMode mode, |
| TailCallMode tail_call_mode) { |
| // ----------- S t a t e ------------- |
| // -- r0 : the number of arguments (not including the receiver) |
| // -- r1 : the target to call (can be any Object). |
| // ----------------------------------- |
| |
| Label non_callable, non_function, non_smi; |
| __ JumpIfSmi(r1, &non_callable); |
| __ bind(&non_smi); |
| __ CompareObjectType(r1, r4, r5, JS_FUNCTION_TYPE); |
| __ Jump(masm->isolate()->builtins()->CallFunction(mode, tail_call_mode), |
| RelocInfo::CODE_TARGET, eq); |
| __ cmp(r5, Operand(JS_BOUND_FUNCTION_TYPE)); |
| __ Jump(masm->isolate()->builtins()->CallBoundFunction(tail_call_mode), |
| RelocInfo::CODE_TARGET, eq); |
| |
| // Check if target has a [[Call]] internal method. |
| __ ldrb(r4, FieldMemOperand(r4, Map::kBitFieldOffset)); |
| __ tst(r4, Operand(1 << Map::kIsCallable)); |
| __ b(eq, &non_callable); |
| |
| __ cmp(r5, Operand(JS_PROXY_TYPE)); |
| __ b(ne, &non_function); |
| |
| // 0. Prepare for tail call if necessary. |
| if (tail_call_mode == TailCallMode::kAllow) { |
| PrepareForTailCall(masm, r0, r3, r4, r5); |
| } |
| |
| // 1. Runtime fallback for Proxy [[Call]]. |
| __ Push(r1); |
| // Increase the arguments size to include the pushed function and the |
| // existing receiver on the stack. |
| __ add(r0, r0, Operand(2)); |
| // Tail-call to the runtime. |
| __ JumpToExternalReference( |
| ExternalReference(Runtime::kJSProxyCall, masm->isolate())); |
| |
| // 2. Call to something else, which might have a [[Call]] internal method (if |
| // not we raise an exception). |
| __ bind(&non_function); |
| // Overwrite the original receiver the (original) target. |
| __ str(r1, MemOperand(sp, r0, LSL, kPointerSizeLog2)); |
| // Let the "call_as_function_delegate" take care of the rest. |
| __ LoadNativeContextSlot(Context::CALL_AS_FUNCTION_DELEGATE_INDEX, r1); |
| __ Jump(masm->isolate()->builtins()->CallFunction( |
| ConvertReceiverMode::kNotNullOrUndefined, tail_call_mode), |
| RelocInfo::CODE_TARGET); |
| |
| // 3. Call to something that is not callable. |
| __ bind(&non_callable); |
| { |
| FrameAndConstantPoolScope scope(masm, StackFrame::INTERNAL); |
| __ Push(r1); |
| __ CallRuntime(Runtime::kThrowCalledNonCallable); |
| } |
| } |
| |
| // static |
| void Builtins::Generate_ConstructFunction(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- r0 : the number of arguments (not including the receiver) |
| // -- r1 : the constructor to call (checked to be a JSFunction) |
| // -- r3 : the new target (checked to be a constructor) |
| // ----------------------------------- |
| __ AssertFunction(r1); |
| |
| // Calling convention for function specific ConstructStubs require |
| // r2 to contain either an AllocationSite or undefined. |
| __ LoadRoot(r2, Heap::kUndefinedValueRootIndex); |
| |
| // Tail call to the function-specific construct stub (still in the caller |
| // context at this point). |
| __ ldr(r4, FieldMemOperand(r1, JSFunction::kSharedFunctionInfoOffset)); |
| __ ldr(r4, FieldMemOperand(r4, SharedFunctionInfo::kConstructStubOffset)); |
| __ add(pc, r4, Operand(Code::kHeaderSize - kHeapObjectTag)); |
| } |
| |
| // static |
| void Builtins::Generate_ConstructBoundFunction(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- r0 : the number of arguments (not including the receiver) |
| // -- r1 : the function to call (checked to be a JSBoundFunction) |
| // -- r3 : the new target (checked to be a constructor) |
| // ----------------------------------- |
| __ AssertBoundFunction(r1); |
| |
| // Push the [[BoundArguments]] onto the stack. |
| Generate_PushBoundArguments(masm); |
| |
| // Patch new.target to [[BoundTargetFunction]] if new.target equals target. |
| __ cmp(r1, r3); |
| __ ldr(r3, FieldMemOperand(r1, JSBoundFunction::kBoundTargetFunctionOffset), |
| eq); |
| |
| // Construct the [[BoundTargetFunction]] via the Construct builtin. |
| __ ldr(r1, FieldMemOperand(r1, JSBoundFunction::kBoundTargetFunctionOffset)); |
| __ mov(ip, Operand(ExternalReference(Builtins::kConstruct, masm->isolate()))); |
| __ ldr(ip, MemOperand(ip)); |
| __ add(pc, ip, Operand(Code::kHeaderSize - kHeapObjectTag)); |
| } |
| |
| // static |
| void Builtins::Generate_ConstructProxy(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- r0 : the number of arguments (not including the receiver) |
| // -- r1 : the constructor to call (checked to be a JSProxy) |
| // -- r3 : the new target (either the same as the constructor or |
| // the JSFunction on which new was invoked initially) |
| // ----------------------------------- |
| |
| // Call into the Runtime for Proxy [[Construct]]. |
| __ Push(r1); |
| __ Push(r3); |
| // Include the pushed new_target, constructor and the receiver. |
| __ add(r0, r0, Operand(3)); |
| // Tail-call to the runtime. |
| __ JumpToExternalReference( |
| ExternalReference(Runtime::kJSProxyConstruct, masm->isolate())); |
| } |
| |
| // static |
| void Builtins::Generate_Construct(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- r0 : the number of arguments (not including the receiver) |
| // -- r1 : the constructor to call (can be any Object) |
| // -- r3 : the new target (either the same as the constructor or |
| // the JSFunction on which new was invoked initially) |
| // ----------------------------------- |
| |
| // Check if target is a Smi. |
| Label non_constructor; |
| __ JumpIfSmi(r1, &non_constructor); |
| |
| // Dispatch based on instance type. |
| __ CompareObjectType(r1, r4, r5, JS_FUNCTION_TYPE); |
| __ Jump(masm->isolate()->builtins()->ConstructFunction(), |
| RelocInfo::CODE_TARGET, eq); |
| |
| // Check if target has a [[Construct]] internal method. |
| __ ldrb(r2, FieldMemOperand(r4, Map::kBitFieldOffset)); |
| __ tst(r2, Operand(1 << Map::kIsConstructor)); |
| __ b(eq, &non_constructor); |
| |
| // Only dispatch to bound functions after checking whether they are |
| // constructors. |
| __ cmp(r5, Operand(JS_BOUND_FUNCTION_TYPE)); |
| __ Jump(masm->isolate()->builtins()->ConstructBoundFunction(), |
| RelocInfo::CODE_TARGET, eq); |
| |
| // Only dispatch to proxies after checking whether they are constructors. |
| __ cmp(r5, Operand(JS_PROXY_TYPE)); |
| __ Jump(masm->isolate()->builtins()->ConstructProxy(), RelocInfo::CODE_TARGET, |
| eq); |
| |
| // Called Construct on an exotic Object with a [[Construct]] internal method. |
| { |
| // Overwrite the original receiver with the (original) target. |
| __ str(r1, MemOperand(sp, r0, LSL, kPointerSizeLog2)); |
| // Let the "call_as_constructor_delegate" take care of the rest. |
| __ LoadNativeContextSlot(Context::CALL_AS_CONSTRUCTOR_DELEGATE_INDEX, r1); |
| __ Jump(masm->isolate()->builtins()->CallFunction(), |
| RelocInfo::CODE_TARGET); |
| } |
| |
| // Called Construct on an Object that doesn't have a [[Construct]] internal |
| // method. |
| __ bind(&non_constructor); |
| __ Jump(masm->isolate()->builtins()->ConstructedNonConstructable(), |
| RelocInfo::CODE_TARGET); |
| } |
| |
| // static |
| void Builtins::Generate_AllocateInNewSpace(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- r1 : requested object size (untagged) |
| // -- lr : return address |
| // ----------------------------------- |
| __ SmiTag(r1); |
| __ Push(r1); |
| __ Move(cp, Smi::kZero); |
| __ TailCallRuntime(Runtime::kAllocateInNewSpace); |
| } |
| |
| // static |
| void Builtins::Generate_AllocateInOldSpace(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- r1 : requested object size (untagged) |
| // -- lr : return address |
| // ----------------------------------- |
| __ SmiTag(r1); |
| __ Move(r2, Smi::FromInt(AllocateTargetSpace::encode(OLD_SPACE))); |
| __ Push(r1, r2); |
| __ Move(cp, Smi::kZero); |
| __ TailCallRuntime(Runtime::kAllocateInTargetSpace); |
| } |
| |
| // static |
| void Builtins::Generate_Abort(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- r1 : message_id as Smi |
| // -- lr : return address |
| // ----------------------------------- |
| __ Push(r1); |
| __ Move(cp, Smi::kZero); |
| __ TailCallRuntime(Runtime::kAbort); |
| } |
| |
| void Builtins::Generate_ArgumentsAdaptorTrampoline(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- r0 : actual number of arguments |
| // -- r1 : function (passed through to callee) |
| // -- r2 : expected number of arguments |
| // -- r3 : new target (passed through to callee) |
| // ----------------------------------- |
| |
| Label invoke, dont_adapt_arguments, stack_overflow; |
| |
| Label enough, too_few; |
| __ cmp(r0, r2); |
| __ b(lt, &too_few); |
| __ cmp(r2, Operand(SharedFunctionInfo::kDontAdaptArgumentsSentinel)); |
| __ b(eq, &dont_adapt_arguments); |
| |
| { // Enough parameters: actual >= expected |
| __ bind(&enough); |
| EnterArgumentsAdaptorFrame(masm); |
| Generate_StackOverflowCheck(masm, r2, r5, &stack_overflow); |
| |
| // Calculate copy start address into r0 and copy end address into r4. |
| // r0: actual number of arguments as a smi |
| // r1: function |
| // r2: expected number of arguments |
| // r3: new target (passed through to callee) |
| __ add(r0, fp, Operand::PointerOffsetFromSmiKey(r0)); |
| // adjust for return address and receiver |
| __ add(r0, r0, Operand(2 * kPointerSize)); |
| __ sub(r4, r0, Operand(r2, LSL, kPointerSizeLog2)); |
| |
| // Copy the arguments (including the receiver) to the new stack frame. |
| // r0: copy start address |
| // r1: function |
| // r2: expected number of arguments |
| // r3: new target (passed through to callee) |
| // r4: copy end address |
| |
| Label copy; |
| __ bind(©); |
| __ ldr(ip, MemOperand(r0, 0)); |
| __ push(ip); |
| __ cmp(r0, r4); // Compare before moving to next argument. |
| __ sub(r0, r0, Operand(kPointerSize)); |
| __ b(ne, ©); |
| |
| __ b(&invoke); |
| } |
| |
| { // Too few parameters: Actual < expected |
| __ bind(&too_few); |
| EnterArgumentsAdaptorFrame(masm); |
| Generate_StackOverflowCheck(masm, r2, r5, &stack_overflow); |
| |
| // Calculate copy start address into r0 and copy end address is fp. |
| // r0: actual number of arguments as a smi |
| // r1: function |
| // r2: expected number of arguments |
| // r3: new target (passed through to callee) |
| __ add(r0, fp, Operand::PointerOffsetFromSmiKey(r0)); |
| |
| // Copy the arguments (including the receiver) to the new stack frame. |
| // r0: copy start address |
| // r1: function |
| // r2: expected number of arguments |
| // r3: new target (passed through to callee) |
| Label copy; |
| __ bind(©); |
| // Adjust load for return address and receiver. |
| __ ldr(ip, MemOperand(r0, 2 * kPointerSize)); |
| __ push(ip); |
| __ cmp(r0, fp); // Compare before moving to next argument. |
| __ sub(r0, r0, Operand(kPointerSize)); |
| __ b(ne, ©); |
| |
| // Fill the remaining expected arguments with undefined. |
| // r1: function |
| // r2: expected number of arguments |
| // r3: new target (passed through to callee) |
| __ LoadRoot(ip, Heap::kUndefinedValueRootIndex); |
| __ sub(r4, fp, Operand(r2, LSL, kPointerSizeLog2)); |
| // Adjust for frame. |
| __ sub(r4, r4, Operand(StandardFrameConstants::kFixedFrameSizeFromFp + |
| 2 * kPointerSize)); |
| |
| Label fill; |
| __ bind(&fill); |
| __ push(ip); |
| __ cmp(sp, r4); |
| __ b(ne, &fill); |
| } |
| |
| // Call the entry point. |
| __ bind(&invoke); |
| __ mov(r0, r2); |
| // r0 : expected number of arguments |
| // r1 : function (passed through to callee) |
| // r3 : new target (passed through to callee) |
| __ ldr(r4, FieldMemOperand(r1, JSFunction::kCodeEntryOffset)); |
| __ Call(r4); |
| |
| // Store offset of return address for deoptimizer. |
| masm->isolate()->heap()->SetArgumentsAdaptorDeoptPCOffset(masm->pc_offset()); |
| |
| // Exit frame and return. |
| LeaveArgumentsAdaptorFrame(masm); |
| __ Jump(lr); |
| |
| // ------------------------------------------- |
| // Dont adapt arguments. |
| // ------------------------------------------- |
| __ bind(&dont_adapt_arguments); |
| __ ldr(r4, FieldMemOperand(r1, JSFunction::kCodeEntryOffset)); |
| __ Jump(r4); |
| |
| __ bind(&stack_overflow); |
| { |
| FrameScope frame(masm, StackFrame::MANUAL); |
| __ CallRuntime(Runtime::kThrowStackOverflow); |
| __ bkpt(0); |
| } |
| } |
| |
| #undef __ |
| |
| } // namespace internal |
| } // namespace v8 |
| |
| #endif // V8_TARGET_ARCH_ARM |
