Regis Crelier
7f57ebcfa1
They were used as the class of closure instances and as the type class of function types. All closure instances now have class _Closure and function types are represented by a new class FunctionType extending AbstractType. Fix issue 24567 and add regression test. R=asiva@google.com, rmacnak@google.com Review URL: https://codereview.chromium.org/1584223006 .
2203 lines
74 KiB
C++
2203 lines
74 KiB
C++
// Copyright (c) 2014, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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#include "vm/globals.h"
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#if defined(TARGET_ARCH_ARM64)
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#include "vm/assembler.h"
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#include "vm/code_generator.h"
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#include "vm/compiler.h"
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#include "vm/dart_entry.h"
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#include "vm/flow_graph_compiler.h"
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#include "vm/heap.h"
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#include "vm/instructions.h"
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#include "vm/object_store.h"
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#include "vm/stack_frame.h"
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#include "vm/stub_code.h"
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#include "vm/tags.h"
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#define __ assembler->
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namespace dart {
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DEFINE_FLAG(bool, inline_alloc, true, "Inline allocation of objects.");
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DEFINE_FLAG(bool, use_slow_path, false,
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"Set to true for debugging & verifying the slow paths.");
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DECLARE_FLAG(bool, trace_optimized_ic_calls);
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DECLARE_FLAG(int, optimization_counter_threshold);
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DECLARE_FLAG(bool, support_debugger);
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DECLARE_FLAG(bool, lazy_dispatchers);
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// Input parameters:
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// LR : return address.
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// SP : address of last argument in argument array.
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// SP + 8*R4 - 8 : address of first argument in argument array.
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// SP + 8*R4 : address of return value.
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// R5 : address of the runtime function to call.
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// R4 : number of arguments to the call.
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void StubCode::GenerateCallToRuntimeStub(Assembler* assembler) {
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const intptr_t thread_offset = NativeArguments::thread_offset();
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const intptr_t argc_tag_offset = NativeArguments::argc_tag_offset();
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const intptr_t argv_offset = NativeArguments::argv_offset();
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const intptr_t retval_offset = NativeArguments::retval_offset();
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__ SetPrologueOffset();
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__ Comment("CallToRuntimeStub");
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__ EnterStubFrame();
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// Save exit frame information to enable stack walking as we are about
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// to transition to Dart VM C++ code.
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__ StoreToOffset(FP, THR, Thread::top_exit_frame_info_offset());
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#if defined(DEBUG)
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{ Label ok;
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// Check that we are always entering from Dart code.
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__ LoadFromOffset(R8, THR, Thread::vm_tag_offset());
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__ CompareImmediate(R8, VMTag::kDartTagId);
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__ b(&ok, EQ);
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__ Stop("Not coming from Dart code.");
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__ Bind(&ok);
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}
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#endif
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// Mark that the thread is executing VM code.
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__ StoreToOffset(R5, THR, Thread::vm_tag_offset());
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// Reserve space for arguments and align frame before entering C++ world.
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// NativeArguments are passed in registers.
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__ Comment("align stack");
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// Reserve space for arguments.
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ASSERT(sizeof(NativeArguments) == 4 * kWordSize);
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__ ReserveAlignedFrameSpace(sizeof(NativeArguments));
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// Pass NativeArguments structure by value and call runtime.
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// Registers R0, R1, R2, and R3 are used.
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ASSERT(thread_offset == 0 * kWordSize);
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// Set thread in NativeArgs.
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__ mov(R0, THR);
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// There are no runtime calls to closures, so we do not need to set the tag
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// bits kClosureFunctionBit and kInstanceFunctionBit in argc_tag_.
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ASSERT(argc_tag_offset == 1 * kWordSize);
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__ mov(R1, R4); // Set argc in NativeArguments.
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ASSERT(argv_offset == 2 * kWordSize);
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__ add(R2, ZR, Operand(R4, LSL, 3));
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__ add(R2, FP, Operand(R2)); // Compute argv.
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// Set argv in NativeArguments.
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__ AddImmediate(R2, R2, kParamEndSlotFromFp * kWordSize);
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ASSERT(retval_offset == 3 * kWordSize);
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__ AddImmediate(R3, R2, kWordSize);
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__ StoreToOffset(R0, SP, thread_offset);
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__ StoreToOffset(R1, SP, argc_tag_offset);
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__ StoreToOffset(R2, SP, argv_offset);
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__ StoreToOffset(R3, SP, retval_offset);
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__ mov(R0, SP); // Pass the pointer to the NativeArguments.
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// We are entering runtime code, so the C stack pointer must be restored from
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// the stack limit to the top of the stack. We cache the stack limit address
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// in a callee-saved register.
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__ mov(R25, CSP);
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__ mov(CSP, SP);
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__ blr(R5);
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__ Comment("CallToRuntimeStub return");
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// Restore SP and CSP.
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__ mov(SP, CSP);
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__ mov(CSP, R25);
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// Retval is next to 1st argument.
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// Mark that the thread is executing Dart code.
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__ LoadImmediate(R2, VMTag::kDartTagId);
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__ StoreToOffset(R2, THR, Thread::vm_tag_offset());
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// Reset exit frame information in Isolate structure.
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__ StoreToOffset(ZR, THR, Thread::top_exit_frame_info_offset());
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__ LeaveStubFrame();
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__ ret();
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}
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// Print the stop message.
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DEFINE_LEAF_RUNTIME_ENTRY(void, PrintStopMessage, 1, const char* message) {
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OS::Print("Stop message: %s\n", message);
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}
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END_LEAF_RUNTIME_ENTRY
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void StubCode::GeneratePrintStopMessageStub(Assembler* assembler) {
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__ Stop("GeneratePrintStopMessageStub");
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}
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// Input parameters:
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// LR : return address.
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// SP : address of return value.
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// R5 : address of the native function to call.
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// R2 : address of first argument in argument array.
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// R1 : argc_tag including number of arguments and function kind.
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void StubCode::GenerateCallNativeCFunctionStub(Assembler* assembler) {
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const intptr_t thread_offset = NativeArguments::thread_offset();
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const intptr_t argc_tag_offset = NativeArguments::argc_tag_offset();
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const intptr_t argv_offset = NativeArguments::argv_offset();
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const intptr_t retval_offset = NativeArguments::retval_offset();
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__ EnterStubFrame();
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// Save exit frame information to enable stack walking as we are about
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// to transition to native code.
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__ StoreToOffset(FP, THR, Thread::top_exit_frame_info_offset());
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#if defined(DEBUG)
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{ Label ok;
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// Check that we are always entering from Dart code.
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__ LoadFromOffset(R6, THR, Thread::vm_tag_offset());
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__ CompareImmediate(R6, VMTag::kDartTagId);
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__ b(&ok, EQ);
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__ Stop("Not coming from Dart code.");
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__ Bind(&ok);
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}
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#endif
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// Mark that the thread is executing native code.
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__ StoreToOffset(R5, THR, Thread::vm_tag_offset());
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// Reserve space for the native arguments structure passed on the stack (the
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// outgoing pointer parameter to the native arguments structure is passed in
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// R0) and align frame before entering the C++ world.
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__ ReserveAlignedFrameSpace(sizeof(NativeArguments));
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// Initialize NativeArguments structure and call native function.
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// Registers R0, R1, R2, and R3 are used.
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ASSERT(thread_offset == 0 * kWordSize);
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// Set thread in NativeArgs.
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__ mov(R0, THR);
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// There are no native calls to closures, so we do not need to set the tag
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// bits kClosureFunctionBit and kInstanceFunctionBit in argc_tag_.
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ASSERT(argc_tag_offset == 1 * kWordSize);
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// Set argc in NativeArguments: R1 already contains argc.
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ASSERT(argv_offset == 2 * kWordSize);
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// Set argv in NativeArguments: R2 already contains argv.
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// Set retval in NativeArgs.
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ASSERT(retval_offset == 3 * kWordSize);
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__ AddImmediate(R3, FP, 2 * kWordSize);
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// Passing the structure by value as in runtime calls would require changing
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// Dart API for native functions.
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// For now, space is reserved on the stack and we pass a pointer to it.
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__ StoreToOffset(R0, SP, thread_offset);
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__ StoreToOffset(R1, SP, argc_tag_offset);
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__ StoreToOffset(R2, SP, argv_offset);
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__ StoreToOffset(R3, SP, retval_offset);
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__ mov(R0, SP); // Pass the pointer to the NativeArguments.
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// We are entering runtime code, so the C stack pointer must be restored from
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// the stack limit to the top of the stack. We cache the stack limit address
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// in the Dart SP register, which is callee-saved in the C ABI.
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__ mov(R25, CSP);
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__ mov(CSP, SP);
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__ mov(R1, R5); // Pass the function entrypoint to call.
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// Call native function invocation wrapper or redirection via simulator.
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__ ldr(LR, Address(THR, Thread::native_call_wrapper_entry_point_offset()));
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__ blr(LR);
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// Restore SP and CSP.
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__ mov(SP, CSP);
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__ mov(CSP, R25);
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// Mark that the thread is executing Dart code.
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__ LoadImmediate(R2, VMTag::kDartTagId);
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__ StoreToOffset(R2, THR, Thread::vm_tag_offset());
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// Reset exit frame information in Isolate structure.
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__ StoreToOffset(ZR, THR, Thread::top_exit_frame_info_offset());
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__ LeaveStubFrame();
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__ ret();
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}
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// Input parameters:
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// LR : return address.
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// SP : address of return value.
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// R5 : address of the native function to call.
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// R2 : address of first argument in argument array.
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// R1 : argc_tag including number of arguments and function kind.
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void StubCode::GenerateCallBootstrapCFunctionStub(Assembler* assembler) {
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const intptr_t thread_offset = NativeArguments::thread_offset();
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const intptr_t argc_tag_offset = NativeArguments::argc_tag_offset();
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const intptr_t argv_offset = NativeArguments::argv_offset();
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const intptr_t retval_offset = NativeArguments::retval_offset();
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__ EnterStubFrame();
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// Save exit frame information to enable stack walking as we are about
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// to transition to native code.
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__ StoreToOffset(FP, THR, Thread::top_exit_frame_info_offset());
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#if defined(DEBUG)
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{ Label ok;
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// Check that we are always entering from Dart code.
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__ LoadFromOffset(R6, THR, Thread::vm_tag_offset());
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__ CompareImmediate(R6, VMTag::kDartTagId);
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__ b(&ok, EQ);
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__ Stop("Not coming from Dart code.");
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__ Bind(&ok);
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}
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#endif
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// Mark that the thread is executing native code.
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__ StoreToOffset(R5, THR, Thread::vm_tag_offset());
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// Reserve space for the native arguments structure passed on the stack (the
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// outgoing pointer parameter to the native arguments structure is passed in
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// R0) and align frame before entering the C++ world.
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__ ReserveAlignedFrameSpace(sizeof(NativeArguments));
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// Initialize NativeArguments structure and call native function.
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// Registers R0, R1, R2, and R3 are used.
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ASSERT(thread_offset == 0 * kWordSize);
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// Set thread in NativeArgs.
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__ mov(R0, THR);
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// There are no native calls to closures, so we do not need to set the tag
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// bits kClosureFunctionBit and kInstanceFunctionBit in argc_tag_.
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ASSERT(argc_tag_offset == 1 * kWordSize);
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// Set argc in NativeArguments: R1 already contains argc.
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ASSERT(argv_offset == 2 * kWordSize);
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// Set argv in NativeArguments: R2 already contains argv.
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// Set retval in NativeArgs.
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ASSERT(retval_offset == 3 * kWordSize);
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__ AddImmediate(R3, FP, 2 * kWordSize);
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// Passing the structure by value as in runtime calls would require changing
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// Dart API for native functions.
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// For now, space is reserved on the stack and we pass a pointer to it.
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__ StoreToOffset(R0, SP, thread_offset);
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__ StoreToOffset(R1, SP, argc_tag_offset);
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__ StoreToOffset(R2, SP, argv_offset);
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__ StoreToOffset(R3, SP, retval_offset);
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__ mov(R0, SP); // Pass the pointer to the NativeArguments.
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// We are entering runtime code, so the C stack pointer must be restored from
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// the stack limit to the top of the stack. We cache the stack limit address
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// in the Dart SP register, which is callee-saved in the C ABI.
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__ mov(R25, CSP);
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__ mov(CSP, SP);
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// Call native function or redirection via simulator.
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__ blr(R5);
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// Restore SP and CSP.
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__ mov(SP, CSP);
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__ mov(CSP, R25);
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// Mark that the thread is executing Dart code.
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__ LoadImmediate(R2, VMTag::kDartTagId);
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__ StoreToOffset(R2, THR, Thread::vm_tag_offset());
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// Reset exit frame information in Isolate structure.
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__ StoreToOffset(ZR, THR, Thread::top_exit_frame_info_offset());
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__ LeaveStubFrame();
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__ ret();
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}
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// Input parameters:
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// R4: arguments descriptor array.
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void StubCode::GenerateCallStaticFunctionStub(Assembler* assembler) {
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// Create a stub frame as we are pushing some objects on the stack before
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// calling into the runtime.
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__ EnterStubFrame();
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// Setup space on stack for return value and preserve arguments descriptor.
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__ Push(R4);
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__ PushObject(Object::null_object());
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__ CallRuntime(kPatchStaticCallRuntimeEntry, 0);
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// Get Code object result and restore arguments descriptor array.
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__ Pop(CODE_REG);
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__ Pop(R4);
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// Remove the stub frame.
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__ LeaveStubFrame();
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// Jump to the dart function.
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__ LoadFieldFromOffset(R0, CODE_REG, Code::entry_point_offset());
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__ br(R0);
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}
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// Called from a static call only when an invalid code has been entered
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// (invalid because its function was optimized or deoptimized).
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// R4: arguments descriptor array.
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void StubCode::GenerateFixCallersTargetStub(Assembler* assembler) {
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// Load code pointer to this stub from the thread:
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// The one that is passed in, is not correct - it points to the code object
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// that needs to be replaced.
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__ ldr(CODE_REG, Address(THR, Thread::fix_callers_target_code_offset()));
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// Create a stub frame as we are pushing some objects on the stack before
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// calling into the runtime.
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__ EnterStubFrame();
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// Setup space on stack for return value and preserve arguments descriptor.
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__ Push(R4);
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__ PushObject(Object::null_object());
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__ CallRuntime(kFixCallersTargetRuntimeEntry, 0);
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// Get Code object result and restore arguments descriptor array.
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__ Pop(CODE_REG);
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__ Pop(R4);
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// Remove the stub frame.
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__ LeaveStubFrame();
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// Jump to the dart function.
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__ LoadFieldFromOffset(R0, CODE_REG, Code::entry_point_offset());
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__ br(R0);
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}
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// Called from object allocate instruction when the allocation stub has been
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// disabled.
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void StubCode::GenerateFixAllocationStubTargetStub(Assembler* assembler) {
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// Load code pointer to this stub from the thread:
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// The one that is passed in, is not correct - it points to the code object
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// that needs to be replaced.
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__ ldr(CODE_REG, Address(THR, Thread::fix_allocation_stub_code_offset()));
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__ EnterStubFrame();
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// Setup space on stack for return value.
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__ PushObject(Object::null_object());
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__ CallRuntime(kFixAllocationStubTargetRuntimeEntry, 0);
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// Get Code object result.
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__ Pop(CODE_REG);
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// Remove the stub frame.
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__ LeaveStubFrame();
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// Jump to the dart function.
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__ LoadFieldFromOffset(R0, CODE_REG, Code::entry_point_offset());
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__ br(R0);
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}
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// Input parameters:
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// R2: smi-tagged argument count, may be zero.
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// FP[kParamEndSlotFromFp + 1]: last argument.
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static void PushArgumentsArray(Assembler* assembler) {
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// Allocate array to store arguments of caller.
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__ LoadObject(R1, Object::null_object());
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// R1: null element type for raw Array.
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// R2: smi-tagged argument count, may be zero.
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__ BranchLink(*StubCode::AllocateArray_entry());
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// R0: newly allocated array.
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// R2: smi-tagged argument count, may be zero (was preserved by the stub).
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__ Push(R0); // Array is in R0 and on top of stack.
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__ add(R1, FP, Operand(R2, LSL, 2));
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__ AddImmediate(R1, R1, kParamEndSlotFromFp * kWordSize);
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__ AddImmediate(R3, R0, Array::data_offset() - kHeapObjectTag);
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// R1: address of first argument on stack.
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// R3: address of first argument in array.
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Label loop, loop_exit;
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__ CompareRegisters(R2, ZR);
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__ b(&loop_exit, LE);
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__ Bind(&loop);
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__ ldr(R7, Address(R1));
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__ AddImmediate(R1, R1, -kWordSize);
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__ AddImmediate(R3, R3, kWordSize);
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__ AddImmediateSetFlags(R2, R2, -Smi::RawValue(1));
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__ str(R7, Address(R3, -kWordSize));
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__ b(&loop, GE);
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__ Bind(&loop_exit);
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}
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// Used by eager and lazy deoptimization. Preserve result in RAX if necessary.
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// This stub translates optimized frame into unoptimized frame. The optimized
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// frame can contain values in registers and on stack, the unoptimized
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// frame contains all values on stack.
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// Deoptimization occurs in following steps:
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// - Push all registers that can contain values.
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// - Call C routine to copy the stack and saved registers into temporary buffer.
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// - Adjust caller's frame to correct unoptimized frame size.
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// - Fill the unoptimized frame.
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// - Materialize objects that require allocation (e.g. Double instances).
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// GC can occur only after frame is fully rewritten.
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// Stack after TagAndPushPP() below:
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// +------------------+
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// | Saved PP | <- PP
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// +------------------+
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// | PC marker | <- TOS
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// +------------------+
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// | Saved FP | <- FP of stub
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// +------------------+
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// | return-address | (deoptimization point)
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// +------------------+
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// | Saved CODE_REG |
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// +------------------+
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// | ... | <- SP of optimized frame
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//
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// Parts of the code cannot GC, part of the code can GC.
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static void GenerateDeoptimizationSequence(Assembler* assembler,
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DeoptStubKind kind) {
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// DeoptimizeCopyFrame expects a Dart frame, i.e. EnterDartFrame(0), but there
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// is no need to set the correct PC marker or load PP, since they get patched.
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__ EnterStubFrame();
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// The code in this frame may not cause GC. kDeoptimizeCopyFrameRuntimeEntry
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// and kDeoptimizeFillFrameRuntimeEntry are leaf runtime calls.
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const intptr_t saved_result_slot_from_fp =
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kFirstLocalSlotFromFp + 1 - (kNumberOfCpuRegisters - R0);
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// Result in R0 is preserved as part of pushing all registers below.
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// Push registers in their enumeration order: lowest register number at
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// lowest address.
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for (intptr_t i = kNumberOfCpuRegisters - 1; i >= 0; i--) {
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const Register r = static_cast<Register>(i);
|
|
if (r == CODE_REG) {
|
|
// Save the original value of CODE_REG pushed before invoking this stub
|
|
// instead of the value used to call this stub.
|
|
COMPILE_ASSERT(R25 > CODE_REG);
|
|
__ ldr(R25, Address(FP, 2 * kWordSize));
|
|
__ str(R25, Address(SP, -1 * kWordSize, Address::PreIndex));
|
|
} else {
|
|
__ str(r, Address(SP, -1 * kWordSize, Address::PreIndex));
|
|
}
|
|
}
|
|
|
|
for (intptr_t reg_idx = kNumberOfVRegisters - 1; reg_idx >= 0; reg_idx--) {
|
|
VRegister vreg = static_cast<VRegister>(reg_idx);
|
|
__ PushQuad(vreg);
|
|
}
|
|
|
|
__ mov(R0, SP); // Pass address of saved registers block.
|
|
__ LoadImmediate(R1, kind == kLazyDeopt ? 1 : 0);
|
|
__ ReserveAlignedFrameSpace(0);
|
|
__ CallRuntime(kDeoptimizeCopyFrameRuntimeEntry, 2);
|
|
// Result (R0) is stack-size (FP - SP) in bytes.
|
|
|
|
const bool preserve_result = (kind == kLazyDeopt);
|
|
if (preserve_result) {
|
|
// Restore result into R1 temporarily.
|
|
__ LoadFromOffset(R1, FP, saved_result_slot_from_fp * kWordSize);
|
|
}
|
|
|
|
// There is a Dart Frame on the stack. We must restore PP and leave frame.
|
|
__ RestoreCodePointer();
|
|
__ LeaveStubFrame();
|
|
__ sub(SP, FP, Operand(R0));
|
|
|
|
// DeoptimizeFillFrame expects a Dart frame, i.e. EnterDartFrame(0), but there
|
|
// is no need to set the correct PC marker or load PP, since they get patched.
|
|
__ EnterStubFrame();
|
|
|
|
if (preserve_result) {
|
|
__ Push(R1); // Preserve result as first local.
|
|
}
|
|
__ ReserveAlignedFrameSpace(0);
|
|
__ mov(R0, FP); // Pass last FP as parameter in R0.
|
|
__ CallRuntime(kDeoptimizeFillFrameRuntimeEntry, 1);
|
|
if (preserve_result) {
|
|
// Restore result into R1.
|
|
__ LoadFromOffset(R1, FP, kFirstLocalSlotFromFp * kWordSize);
|
|
}
|
|
// Code above cannot cause GC.
|
|
// There is a Dart Frame on the stack. We must restore PP and leave frame.
|
|
__ RestoreCodePointer();
|
|
__ LeaveStubFrame();
|
|
|
|
// Frame is fully rewritten at this point and it is safe to perform a GC.
|
|
// Materialize any objects that were deferred by FillFrame because they
|
|
// require allocation.
|
|
// Enter stub frame with loading PP. The caller's PP is not materialized yet.
|
|
__ EnterStubFrame();
|
|
if (preserve_result) {
|
|
__ Push(R1); // Preserve result, it will be GC-d here.
|
|
}
|
|
__ Push(ZR); // Space for the result.
|
|
__ CallRuntime(kDeoptimizeMaterializeRuntimeEntry, 0);
|
|
// Result tells stub how many bytes to remove from the expression stack
|
|
// of the bottom-most frame. They were used as materialization arguments.
|
|
__ Pop(R1);
|
|
__ SmiUntag(R1);
|
|
if (preserve_result) {
|
|
__ Pop(R0); // Restore result.
|
|
}
|
|
__ LeaveStubFrame();
|
|
// Remove materialization arguments.
|
|
__ add(SP, SP, Operand(R1));
|
|
__ ret();
|
|
}
|
|
|
|
|
|
void StubCode::GenerateDeoptimizeLazyStub(Assembler* assembler) {
|
|
// Correct return address to point just after the call that is being
|
|
// deoptimized.
|
|
__ AddImmediate(LR, LR, -CallPattern::kDeoptCallLengthInBytes);
|
|
// Push zap value instead of CODE_REG for lazy deopt.
|
|
__ LoadImmediate(TMP, 0xf1f1f1f1);
|
|
__ Push(TMP);
|
|
GenerateDeoptimizationSequence(assembler, kLazyDeopt);
|
|
}
|
|
|
|
|
|
void StubCode::GenerateDeoptimizeStub(Assembler* assembler) {
|
|
GenerateDeoptimizationSequence(assembler, kEagerDeopt);
|
|
}
|
|
|
|
|
|
static void GenerateDispatcherCode(Assembler* assembler,
|
|
Label* call_target_function) {
|
|
__ Comment("NoSuchMethodDispatch");
|
|
// When lazily generated invocation dispatchers are disabled, the
|
|
// miss-handler may return null.
|
|
__ CompareObject(R0, Object::null_object());
|
|
__ b(call_target_function, NE);
|
|
__ EnterStubFrame();
|
|
|
|
// Load the receiver.
|
|
__ LoadFieldFromOffset(R2, R4, ArgumentsDescriptor::count_offset());
|
|
__ add(TMP, FP, Operand(R2, LSL, 2)); // R2 is Smi.
|
|
__ LoadFromOffset(R6, TMP, kParamEndSlotFromFp * kWordSize);
|
|
__ PushObject(Object::null_object());
|
|
__ Push(R6); // Receiver.
|
|
__ Push(R5); // ICData/MegamorphicCache.
|
|
__ Push(R4); // Arguments descriptor.
|
|
// R2: Smi-tagged arguments array length.
|
|
PushArgumentsArray(assembler);
|
|
const intptr_t kNumArgs = 4;
|
|
__ CallRuntime(kInvokeNoSuchMethodDispatcherRuntimeEntry, kNumArgs);
|
|
__ Drop(4);
|
|
__ Pop(R0); // Return value.
|
|
__ LeaveStubFrame();
|
|
__ ret();
|
|
}
|
|
|
|
|
|
void StubCode::GenerateMegamorphicMissStub(Assembler* assembler) {
|
|
__ EnterStubFrame();
|
|
|
|
// Load the receiver.
|
|
__ LoadFieldFromOffset(R2, R4, ArgumentsDescriptor::count_offset());
|
|
__ add(TMP, FP, Operand(R2, LSL, 2)); // R2 is Smi.
|
|
__ LoadFromOffset(R6, TMP, kParamEndSlotFromFp * kWordSize);
|
|
|
|
// Preserve IC data and arguments descriptor.
|
|
__ Push(R5);
|
|
__ Push(R4);
|
|
|
|
// Push space for the return value.
|
|
// Push the receiver.
|
|
// Push IC data object.
|
|
// Push arguments descriptor array.
|
|
__ PushObject(Object::null_object());
|
|
__ Push(R6);
|
|
__ Push(R5);
|
|
__ Push(R4);
|
|
__ CallRuntime(kMegamorphicCacheMissHandlerRuntimeEntry, 3);
|
|
// Remove arguments.
|
|
__ Drop(3);
|
|
__ Pop(R0); // Get result into R0 (target function).
|
|
|
|
// Restore IC data and arguments descriptor.
|
|
__ Pop(R4);
|
|
__ Pop(R5);
|
|
|
|
__ RestoreCodePointer();
|
|
__ LeaveStubFrame();
|
|
|
|
if (!FLAG_lazy_dispatchers) {
|
|
Label call_target_function;
|
|
GenerateDispatcherCode(assembler, &call_target_function);
|
|
__ Bind(&call_target_function);
|
|
}
|
|
|
|
// Tail-call to target function.
|
|
__ LoadFieldFromOffset(CODE_REG, R0, Function::code_offset());
|
|
__ LoadFieldFromOffset(R2, R0, Function::entry_point_offset());
|
|
__ br(R2);
|
|
}
|
|
|
|
|
|
// Called for inline allocation of arrays.
|
|
// Input parameters:
|
|
// LR: return address.
|
|
// R2: array length as Smi.
|
|
// R1: array element type (either NULL or an instantiated type).
|
|
// NOTE: R2 cannot be clobbered here as the caller relies on it being saved.
|
|
// The newly allocated object is returned in R0.
|
|
void StubCode::GenerateAllocateArrayStub(Assembler* assembler) {
|
|
Label slow_case;
|
|
// Compute the size to be allocated, it is based on the array length
|
|
// and is computed as:
|
|
// RoundedAllocationSize((array_length * kwordSize) + sizeof(RawArray)).
|
|
// Assert that length is a Smi.
|
|
__ tsti(R2, Immediate(kSmiTagMask));
|
|
if (FLAG_use_slow_path) {
|
|
__ b(&slow_case);
|
|
} else {
|
|
__ b(&slow_case, NE);
|
|
}
|
|
__ cmp(R2, Operand(0));
|
|
__ b(&slow_case, LT);
|
|
|
|
// Check for maximum allowed length.
|
|
const intptr_t max_len =
|
|
reinterpret_cast<intptr_t>(Smi::New(Array::kMaxElements));
|
|
__ CompareImmediate(R2, max_len);
|
|
__ b(&slow_case, GT);
|
|
|
|
const intptr_t cid = kArrayCid;
|
|
__ MaybeTraceAllocation(kArrayCid, R4, &slow_case,
|
|
/* inline_isolate = */ false);
|
|
|
|
Heap::Space space = Heap::SpaceForAllocation(cid);
|
|
__ LoadIsolate(R8);
|
|
__ ldr(R8, Address(R8, Isolate::heap_offset()));
|
|
|
|
// Calculate and align allocation size.
|
|
// Load new object start and calculate next object start.
|
|
// R1: array element type.
|
|
// R2: array length as Smi.
|
|
// R8: heap.
|
|
__ LoadFromOffset(R0, R8, Heap::TopOffset(space));
|
|
intptr_t fixed_size = sizeof(RawArray) + kObjectAlignment - 1;
|
|
__ LoadImmediate(R3, fixed_size);
|
|
__ add(R3, R3, Operand(R2, LSL, 2)); // R2 is Smi.
|
|
ASSERT(kSmiTagShift == 1);
|
|
__ andi(R3, R3, Immediate(~(kObjectAlignment - 1)));
|
|
// R0: potential new object start.
|
|
// R3: object size in bytes.
|
|
__ adds(R7, R3, Operand(R0));
|
|
__ b(&slow_case, CS); // Branch if unsigned overflow.
|
|
|
|
// Check if the allocation fits into the remaining space.
|
|
// R0: potential new object start.
|
|
// R1: array element type.
|
|
// R2: array length as Smi.
|
|
// R3: array size.
|
|
// R7: potential next object start.
|
|
// R8: heap.
|
|
__ LoadFromOffset(TMP, R8, Heap::EndOffset(space));
|
|
__ CompareRegisters(R7, TMP);
|
|
__ b(&slow_case, CS); // Branch if unsigned higher or equal.
|
|
|
|
// Successfully allocated the object(s), now update top to point to
|
|
// next object start and initialize the object.
|
|
// R0: potential new object start.
|
|
// R3: array size.
|
|
// R7: potential next object start.
|
|
// R8: heap.
|
|
__ StoreToOffset(R7, R8, Heap::TopOffset(space));
|
|
__ add(R0, R0, Operand(kHeapObjectTag));
|
|
__ UpdateAllocationStatsWithSize(cid, R3, space,
|
|
/* inline_isolate = */ false);
|
|
|
|
// R0: new object start as a tagged pointer.
|
|
// R1: array element type.
|
|
// R2: array length as Smi.
|
|
// R3: array size.
|
|
// R7: new object end address.
|
|
|
|
// Store the type argument field.
|
|
__ StoreIntoObjectOffsetNoBarrier(
|
|
R0, Array::type_arguments_offset(), R1);
|
|
|
|
// Set the length field.
|
|
__ StoreIntoObjectOffsetNoBarrier(R0, Array::length_offset(), R2);
|
|
|
|
// Calculate the size tag.
|
|
// R0: new object start as a tagged pointer.
|
|
// R2: array length as Smi.
|
|
// R3: array size.
|
|
// R7: new object end address.
|
|
const intptr_t shift = RawObject::kSizeTagPos - kObjectAlignmentLog2;
|
|
__ CompareImmediate(R3, RawObject::SizeTag::kMaxSizeTag);
|
|
// If no size tag overflow, shift R1 left, else set R1 to zero.
|
|
__ LslImmediate(TMP, R3, shift);
|
|
__ csel(R1, TMP, R1, LS);
|
|
__ csel(R1, ZR, R1, HI);
|
|
|
|
// Get the class index and insert it into the tags.
|
|
__ LoadImmediate(TMP, RawObject::ClassIdTag::encode(cid));
|
|
__ orr(R1, R1, Operand(TMP));
|
|
__ StoreFieldToOffset(R1, R0, Array::tags_offset());
|
|
|
|
// Initialize all array elements to raw_null.
|
|
// R0: new object start as a tagged pointer.
|
|
// R7: new object end address.
|
|
// R2: array length as Smi.
|
|
__ AddImmediate(R1, R0, Array::data_offset() - kHeapObjectTag);
|
|
// R1: iterator which initially points to the start of the variable
|
|
// data area to be initialized.
|
|
__ LoadObject(TMP, Object::null_object());
|
|
Label loop, done;
|
|
__ Bind(&loop);
|
|
// TODO(cshapiro): StoreIntoObjectNoBarrier
|
|
__ CompareRegisters(R1, R7);
|
|
__ b(&done, CS);
|
|
__ str(TMP, Address(R1)); // Store if unsigned lower.
|
|
__ AddImmediate(R1, R1, kWordSize);
|
|
__ b(&loop); // Loop until R1 == R7.
|
|
__ Bind(&done);
|
|
|
|
// Done allocating and initializing the array.
|
|
// R0: new object.
|
|
// R2: array length as Smi (preserved for the caller.)
|
|
__ ret();
|
|
|
|
// Unable to allocate the array using the fast inline code, just call
|
|
// into the runtime.
|
|
__ Bind(&slow_case);
|
|
// Create a stub frame as we are pushing some objects on the stack before
|
|
// calling into the runtime.
|
|
__ EnterStubFrame();
|
|
// Setup space on stack for return value.
|
|
// Push array length as Smi and element type.
|
|
__ PushObject(Object::null_object());
|
|
__ Push(R2);
|
|
__ Push(R1);
|
|
__ CallRuntime(kAllocateArrayRuntimeEntry, 2);
|
|
// Pop arguments; result is popped in IP.
|
|
__ Pop(R1);
|
|
__ Pop(R2);
|
|
__ Pop(R0);
|
|
__ LeaveStubFrame();
|
|
__ ret();
|
|
}
|
|
|
|
|
|
// Called when invoking Dart code from C++ (VM code).
|
|
// Input parameters:
|
|
// LR : points to return address.
|
|
// R0 : code object of the Dart function to call.
|
|
// R1 : arguments descriptor array.
|
|
// R2 : arguments array.
|
|
// R3 : current thread.
|
|
void StubCode::GenerateInvokeDartCodeStub(Assembler* assembler) {
|
|
__ Comment("InvokeDartCodeStub");
|
|
|
|
// Copy the C stack pointer (R31) into the stack pointer we'll actually use
|
|
// to access the stack, and put the C stack pointer at the stack limit.
|
|
__ SetupDartSP(OSThread::GetSpecifiedStackSize());
|
|
__ EnterFrame(0);
|
|
|
|
// Push code object to PC marker slot.
|
|
__ ldr(TMP, Address(R3, Thread::invoke_dart_code_stub_offset()));
|
|
__ Push(TMP);
|
|
|
|
// Save the callee-saved registers.
|
|
for (int i = kAbiFirstPreservedCpuReg; i <= kAbiLastPreservedCpuReg; i++) {
|
|
const Register r = static_cast<Register>(i);
|
|
// We use str instead of the Push macro because we will be pushing the PP
|
|
// register when it is not holding a pool-pointer since we are coming from
|
|
// C++ code.
|
|
__ str(r, Address(SP, -1 * kWordSize, Address::PreIndex));
|
|
}
|
|
|
|
// Save the bottom 64-bits of callee-saved V registers.
|
|
for (int i = kAbiFirstPreservedFpuReg; i <= kAbiLastPreservedFpuReg; i++) {
|
|
const VRegister r = static_cast<VRegister>(i);
|
|
__ PushDouble(r);
|
|
}
|
|
|
|
// Set up THR, which caches the current thread in Dart code.
|
|
if (THR != R3) {
|
|
__ mov(THR, R3);
|
|
}
|
|
|
|
// Save the current VMTag on the stack.
|
|
__ LoadFromOffset(R4, THR, Thread::vm_tag_offset());
|
|
__ Push(R4);
|
|
|
|
// Mark that the thread is executing Dart code.
|
|
__ LoadImmediate(R6, VMTag::kDartTagId);
|
|
__ StoreToOffset(R6, THR, Thread::vm_tag_offset());
|
|
|
|
// Save top resource and top exit frame info. Use R6 as a temporary register.
|
|
// StackFrameIterator reads the top exit frame info saved in this frame.
|
|
__ LoadFromOffset(R6, THR, Thread::top_resource_offset());
|
|
__ StoreToOffset(ZR, THR, Thread::top_resource_offset());
|
|
__ Push(R6);
|
|
__ LoadFromOffset(R6, THR, Thread::top_exit_frame_info_offset());
|
|
__ StoreToOffset(ZR, THR, Thread::top_exit_frame_info_offset());
|
|
// kExitLinkSlotFromEntryFp must be kept in sync with the code below.
|
|
ASSERT(kExitLinkSlotFromEntryFp == -22);
|
|
__ Push(R6);
|
|
|
|
// Load arguments descriptor array into R4, which is passed to Dart code.
|
|
__ LoadFromOffset(R4, R1, VMHandles::kOffsetOfRawPtrInHandle);
|
|
|
|
// Load number of arguments into S5.
|
|
__ LoadFieldFromOffset(R5, R4, ArgumentsDescriptor::count_offset());
|
|
__ SmiUntag(R5);
|
|
|
|
// Compute address of 'arguments array' data area into R2.
|
|
__ LoadFromOffset(R2, R2, VMHandles::kOffsetOfRawPtrInHandle);
|
|
__ AddImmediate(R2, R2, Array::data_offset() - kHeapObjectTag);
|
|
|
|
// Set up arguments for the Dart call.
|
|
Label push_arguments;
|
|
Label done_push_arguments;
|
|
__ cmp(R5, Operand(0));
|
|
__ b(&done_push_arguments, EQ); // check if there are arguments.
|
|
__ LoadImmediate(R1, 0);
|
|
__ Bind(&push_arguments);
|
|
__ ldr(R3, Address(R2));
|
|
__ Push(R3);
|
|
__ add(R1, R1, Operand(1));
|
|
__ add(R2, R2, Operand(kWordSize));
|
|
__ cmp(R1, Operand(R5));
|
|
__ b(&push_arguments, LT);
|
|
__ Bind(&done_push_arguments);
|
|
|
|
// We now load the pool pointer(PP) with a GC safe value as we are about to
|
|
// invoke dart code. We don't need a real object pool here.
|
|
// Smi zero does not work because ARM64 assumes PP to be untagged.
|
|
__ LoadObject(PP, Object::null_object());
|
|
|
|
// Call the Dart code entrypoint.
|
|
__ ldr(CODE_REG, Address(R0, VMHandles::kOffsetOfRawPtrInHandle));
|
|
__ ldr(R0, FieldAddress(CODE_REG, Code::entry_point_offset()));
|
|
__ blr(R0); // R4 is the arguments descriptor array.
|
|
__ Comment("InvokeDartCodeStub return");
|
|
|
|
// Get rid of arguments pushed on the stack.
|
|
__ AddImmediate(SP, FP, kExitLinkSlotFromEntryFp * kWordSize);
|
|
|
|
// Restore the saved top exit frame info and top resource back into the
|
|
// Isolate structure. Uses R6 as a temporary register for this.
|
|
__ Pop(R6);
|
|
__ StoreToOffset(R6, THR, Thread::top_exit_frame_info_offset());
|
|
__ Pop(R6);
|
|
__ StoreToOffset(R6, THR, Thread::top_resource_offset());
|
|
|
|
// Restore the current VMTag from the stack.
|
|
__ Pop(R4);
|
|
__ StoreToOffset(R4, THR, Thread::vm_tag_offset());
|
|
|
|
// Restore the bottom 64-bits of callee-saved V registers.
|
|
for (int i = kAbiLastPreservedFpuReg; i >= kAbiFirstPreservedFpuReg; i--) {
|
|
const VRegister r = static_cast<VRegister>(i);
|
|
__ PopDouble(r);
|
|
}
|
|
|
|
// Restore C++ ABI callee-saved registers.
|
|
for (int i = kAbiLastPreservedCpuReg; i >= kAbiFirstPreservedCpuReg; i--) {
|
|
Register r = static_cast<Register>(i);
|
|
// We use ldr instead of the Pop macro because we will be popping the PP
|
|
// register when it is not holding a pool-pointer since we are returning to
|
|
// C++ code. We also skip the dart stack pointer SP, since we are still
|
|
// using it as the stack pointer.
|
|
__ ldr(r, Address(SP, 1 * kWordSize, Address::PostIndex));
|
|
}
|
|
|
|
// Restore the frame pointer and C stack pointer and return.
|
|
__ LeaveFrame();
|
|
__ mov(CSP, SP);
|
|
__ ret();
|
|
}
|
|
|
|
|
|
// Called for inline allocation of contexts.
|
|
// Input:
|
|
// R1: number of context variables.
|
|
// Output:
|
|
// R0: new allocated RawContext object.
|
|
void StubCode::GenerateAllocateContextStub(Assembler* assembler) {
|
|
if (FLAG_inline_alloc) {
|
|
Label slow_case;
|
|
// First compute the rounded instance size.
|
|
// R1: number of context variables.
|
|
intptr_t fixed_size = sizeof(RawContext) + kObjectAlignment - 1;
|
|
__ LoadImmediate(R2, fixed_size);
|
|
__ add(R2, R2, Operand(R1, LSL, 3));
|
|
ASSERT(kSmiTagShift == 1);
|
|
__ andi(R2, R2, Immediate(~(kObjectAlignment - 1)));
|
|
|
|
__ MaybeTraceAllocation(kContextCid, R4, &slow_case,
|
|
/* inline_isolate = */ false);
|
|
// Now allocate the object.
|
|
// R1: number of context variables.
|
|
// R2: object size.
|
|
const intptr_t cid = kContextCid;
|
|
Heap::Space space = Heap::SpaceForAllocation(cid);
|
|
__ LoadIsolate(R5);
|
|
__ ldr(R5, Address(R5, Isolate::heap_offset()));
|
|
__ ldr(R0, Address(R5, Heap::TopOffset(space)));
|
|
__ add(R3, R2, Operand(R0));
|
|
// Check if the allocation fits into the remaining space.
|
|
// R0: potential new object.
|
|
// R1: number of context variables.
|
|
// R2: object size.
|
|
// R3: potential next object start.
|
|
// R5: heap.
|
|
__ ldr(TMP, Address(R5, Heap::EndOffset(space)));
|
|
__ CompareRegisters(R3, TMP);
|
|
if (FLAG_use_slow_path) {
|
|
__ b(&slow_case);
|
|
} else {
|
|
__ b(&slow_case, CS); // Branch if unsigned higher or equal.
|
|
}
|
|
|
|
// Successfully allocated the object, now update top to point to
|
|
// next object start and initialize the object.
|
|
// R0: new object.
|
|
// R1: number of context variables.
|
|
// R2: object size.
|
|
// R3: next object start.
|
|
// R5: heap.
|
|
__ str(R3, Address(R5, Heap::TopOffset(space)));
|
|
__ add(R0, R0, Operand(kHeapObjectTag));
|
|
__ UpdateAllocationStatsWithSize(cid, R2, space,
|
|
/* inline_isolate = */ false);
|
|
|
|
// Calculate the size tag.
|
|
// R0: new object.
|
|
// R1: number of context variables.
|
|
// R2: object size.
|
|
const intptr_t shift = RawObject::kSizeTagPos - kObjectAlignmentLog2;
|
|
__ CompareImmediate(R2, RawObject::SizeTag::kMaxSizeTag);
|
|
// If no size tag overflow, shift R2 left, else set R2 to zero.
|
|
__ LslImmediate(TMP, R2, shift);
|
|
__ csel(R2, TMP, R2, LS);
|
|
__ csel(R2, ZR, R2, HI);
|
|
|
|
// Get the class index and insert it into the tags.
|
|
// R2: size and bit tags.
|
|
__ LoadImmediate(TMP, RawObject::ClassIdTag::encode(cid));
|
|
__ orr(R2, R2, Operand(TMP));
|
|
__ StoreFieldToOffset(R2, R0, Context::tags_offset());
|
|
|
|
// Setup up number of context variables field.
|
|
// R0: new object.
|
|
// R1: number of context variables as integer value (not object).
|
|
__ StoreFieldToOffset(R1, R0, Context::num_variables_offset());
|
|
|
|
// Setup the parent field.
|
|
// R0: new object.
|
|
// R1: number of context variables.
|
|
__ LoadObject(R2, Object::null_object());
|
|
__ StoreFieldToOffset(R2, R0, Context::parent_offset());
|
|
|
|
// Initialize the context variables.
|
|
// R0: new object.
|
|
// R1: number of context variables.
|
|
// R2: raw null.
|
|
Label loop, done;
|
|
__ AddImmediate(
|
|
R3, R0, Context::variable_offset(0) - kHeapObjectTag);
|
|
__ Bind(&loop);
|
|
__ subs(R1, R1, Operand(1));
|
|
__ b(&done, MI);
|
|
__ str(R2, Address(R3, R1, UXTX, Address::Scaled));
|
|
__ b(&loop, NE); // Loop if R1 not zero.
|
|
__ Bind(&done);
|
|
|
|
// Done allocating and initializing the context.
|
|
// R0: new object.
|
|
__ ret();
|
|
|
|
__ Bind(&slow_case);
|
|
}
|
|
// Create a stub frame as we are pushing some objects on the stack before
|
|
// calling into the runtime.
|
|
__ EnterStubFrame();
|
|
// Setup space on stack for return value.
|
|
__ SmiTag(R1);
|
|
__ PushObject(Object::null_object());
|
|
__ Push(R1);
|
|
__ CallRuntime(kAllocateContextRuntimeEntry, 1); // Allocate context.
|
|
__ Drop(1); // Pop number of context variables argument.
|
|
__ Pop(R0); // Pop the new context object.
|
|
// R0: new object
|
|
// Restore the frame pointer.
|
|
__ LeaveStubFrame();
|
|
__ ret();
|
|
}
|
|
|
|
|
|
// Helper stub to implement Assembler::StoreIntoObject.
|
|
// Input parameters:
|
|
// R0: Address being stored
|
|
void StubCode::GenerateUpdateStoreBufferStub(Assembler* assembler) {
|
|
Label add_to_buffer;
|
|
// Check whether this object has already been remembered. Skip adding to the
|
|
// store buffer if the object is in the store buffer already.
|
|
__ LoadFieldFromOffset(TMP, R0, Object::tags_offset());
|
|
__ tsti(TMP, Immediate(1 << RawObject::kRememberedBit));
|
|
__ b(&add_to_buffer, EQ);
|
|
__ ret();
|
|
|
|
__ Bind(&add_to_buffer);
|
|
// Save values being destroyed.
|
|
__ Push(R1);
|
|
__ Push(R2);
|
|
__ Push(R3);
|
|
|
|
__ orri(R2, TMP, Immediate(1 << RawObject::kRememberedBit));
|
|
__ StoreFieldToOffset(R2, R0, Object::tags_offset());
|
|
|
|
// Load the StoreBuffer block out of the thread. Then load top_ out of the
|
|
// StoreBufferBlock and add the address to the pointers_.
|
|
__ LoadFromOffset(R1, THR, Thread::store_buffer_block_offset());
|
|
__ LoadFromOffset(R2, R1, StoreBufferBlock::top_offset(), kUnsignedWord);
|
|
__ add(R3, R1, Operand(R2, LSL, 3));
|
|
__ StoreToOffset(R0, R3, StoreBufferBlock::pointers_offset());
|
|
|
|
// Increment top_ and check for overflow.
|
|
// R2: top_.
|
|
// R1: StoreBufferBlock.
|
|
Label L;
|
|
__ add(R2, R2, Operand(1));
|
|
__ StoreToOffset(R2, R1, StoreBufferBlock::top_offset(), kUnsignedWord);
|
|
__ CompareImmediate(R2, StoreBufferBlock::kSize);
|
|
// Restore values.
|
|
__ Pop(R3);
|
|
__ Pop(R2);
|
|
__ Pop(R1);
|
|
__ b(&L, EQ);
|
|
__ ret();
|
|
|
|
// Handle overflow: Call the runtime leaf function.
|
|
__ Bind(&L);
|
|
// Setup frame, push callee-saved registers.
|
|
|
|
__ EnterCallRuntimeFrame(0 * kWordSize);
|
|
__ mov(R0, THR);
|
|
__ CallRuntime(kStoreBufferBlockProcessRuntimeEntry, 1);
|
|
// Restore callee-saved registers, tear down frame.
|
|
__ LeaveCallRuntimeFrame();
|
|
__ ret();
|
|
}
|
|
|
|
|
|
// Called for inline allocation of objects.
|
|
// Input parameters:
|
|
// LR : return address.
|
|
// SP + 0 : type arguments object (only if class is parameterized).
|
|
void StubCode::GenerateAllocationStubForClass(Assembler* assembler,
|
|
const Class& cls) {
|
|
// The generated code is different if the class is parameterized.
|
|
const bool is_cls_parameterized = cls.NumTypeArguments() > 0;
|
|
ASSERT(!is_cls_parameterized ||
|
|
(cls.type_arguments_field_offset() != Class::kNoTypeArguments));
|
|
// kInlineInstanceSize is a constant used as a threshold for determining
|
|
// when the object initialization should be done as a loop or as
|
|
// straight line code.
|
|
const int kInlineInstanceSize = 12;
|
|
const intptr_t instance_size = cls.instance_size();
|
|
ASSERT(instance_size > 0);
|
|
if (is_cls_parameterized) {
|
|
__ ldr(R1, Address(SP));
|
|
// R1: instantiated type arguments.
|
|
}
|
|
Isolate* isolate = Isolate::Current();
|
|
if (FLAG_inline_alloc && Heap::IsAllocatableInNewSpace(instance_size) &&
|
|
!cls.TraceAllocation(isolate)) {
|
|
Label slow_case;
|
|
// Allocate the object and update top to point to
|
|
// next object start and initialize the allocated object.
|
|
// R1: instantiated type arguments (if is_cls_parameterized).
|
|
Heap::Space space = Heap::SpaceForAllocation(cls.id());
|
|
__ ldr(R5, Address(THR, Thread::heap_offset()));
|
|
__ ldr(R2, Address(R5, Heap::TopOffset(space)));
|
|
__ AddImmediate(R3, R2, instance_size);
|
|
// Check if the allocation fits into the remaining space.
|
|
// R2: potential new object start.
|
|
// R3: potential next object start.
|
|
// R5: heap.
|
|
__ ldr(TMP, Address(R5, Heap::EndOffset(space)));
|
|
__ CompareRegisters(R3, TMP);
|
|
if (FLAG_use_slow_path) {
|
|
__ b(&slow_case);
|
|
} else {
|
|
__ b(&slow_case, CS); // Unsigned higher or equal.
|
|
}
|
|
__ str(R3, Address(R5, Heap::TopOffset(space)));
|
|
__ UpdateAllocationStats(cls.id(), space, /* inline_isolate = */ false);
|
|
|
|
// R2: new object start.
|
|
// R3: next object start.
|
|
// R1: new object type arguments (if is_cls_parameterized).
|
|
// Set the tags.
|
|
uword tags = 0;
|
|
tags = RawObject::SizeTag::update(instance_size, tags);
|
|
ASSERT(cls.id() != kIllegalCid);
|
|
tags = RawObject::ClassIdTag::update(cls.id(), tags);
|
|
__ LoadImmediate(R0, tags);
|
|
__ StoreToOffset(R0, R2, Instance::tags_offset());
|
|
|
|
// Initialize the remaining words of the object.
|
|
__ LoadObject(R0, Object::null_object());
|
|
|
|
// R0: raw null.
|
|
// R2: new object start.
|
|
// R3: next object start.
|
|
// R1: new object type arguments (if is_cls_parameterized).
|
|
// First try inlining the initialization without a loop.
|
|
if (instance_size < (kInlineInstanceSize * kWordSize)) {
|
|
// Check if the object contains any non-header fields.
|
|
// Small objects are initialized using a consecutive set of writes.
|
|
for (intptr_t current_offset = Instance::NextFieldOffset();
|
|
current_offset < instance_size;
|
|
current_offset += kWordSize) {
|
|
__ StoreToOffset(R0, R2, current_offset);
|
|
}
|
|
} else {
|
|
__ AddImmediate(R4, R2, Instance::NextFieldOffset());
|
|
// Loop until the whole object is initialized.
|
|
// R0: raw null.
|
|
// R2: new object.
|
|
// R3: next object start.
|
|
// R4: next word to be initialized.
|
|
// R1: new object type arguments (if is_cls_parameterized).
|
|
Label init_loop;
|
|
Label done;
|
|
__ Bind(&init_loop);
|
|
__ CompareRegisters(R4, R3);
|
|
__ b(&done, CS);
|
|
__ str(R0, Address(R4));
|
|
__ AddImmediate(R4, R4, kWordSize);
|
|
__ b(&init_loop);
|
|
__ Bind(&done);
|
|
}
|
|
if (is_cls_parameterized) {
|
|
// R1: new object type arguments.
|
|
// Set the type arguments in the new object.
|
|
__ StoreToOffset(R1, R2, cls.type_arguments_field_offset());
|
|
}
|
|
// Done allocating and initializing the instance.
|
|
// R2: new object still missing its heap tag.
|
|
__ add(R0, R2, Operand(kHeapObjectTag));
|
|
// R0: new object.
|
|
__ ret();
|
|
|
|
__ Bind(&slow_case);
|
|
}
|
|
// If is_cls_parameterized:
|
|
// R1: new object type arguments.
|
|
// Create a stub frame as we are pushing some objects on the stack before
|
|
// calling into the runtime.
|
|
__ EnterStubFrame(); // Uses pool pointer to pass cls to runtime.
|
|
// Setup space on stack for return value.
|
|
__ PushObject(Object::null_object());
|
|
__ PushObject(cls); // Push class of object to be allocated.
|
|
if (is_cls_parameterized) {
|
|
// Push type arguments.
|
|
__ Push(R1);
|
|
} else {
|
|
// Push null type arguments.
|
|
__ PushObject(Object::null_object());
|
|
}
|
|
__ CallRuntime(kAllocateObjectRuntimeEntry, 2); // Allocate object.
|
|
__ Drop(2); // Pop arguments.
|
|
__ Pop(R0); // Pop result (newly allocated object).
|
|
// R0: new object
|
|
// Restore the frame pointer.
|
|
__ LeaveStubFrame();
|
|
__ ret();
|
|
}
|
|
|
|
|
|
// Called for invoking "dynamic noSuchMethod(Invocation invocation)" function
|
|
// from the entry code of a dart function after an error in passed argument
|
|
// name or number is detected.
|
|
// Input parameters:
|
|
// LR : return address.
|
|
// SP : address of last argument.
|
|
// R4: arguments descriptor array.
|
|
void StubCode::GenerateCallClosureNoSuchMethodStub(Assembler* assembler) {
|
|
__ EnterStubFrame();
|
|
|
|
// Load the receiver.
|
|
__ LoadFieldFromOffset(R2, R4, ArgumentsDescriptor::count_offset());
|
|
__ add(TMP, FP, Operand(R2, LSL, 2)); // R2 is Smi.
|
|
__ LoadFromOffset(R6, TMP, kParamEndSlotFromFp * kWordSize);
|
|
|
|
// Push space for the return value.
|
|
// Push the receiver.
|
|
// Push arguments descriptor array.
|
|
__ PushObject(Object::null_object());
|
|
__ Push(R6);
|
|
__ Push(R4);
|
|
|
|
// R2: Smi-tagged arguments array length.
|
|
PushArgumentsArray(assembler);
|
|
|
|
const intptr_t kNumArgs = 3;
|
|
__ CallRuntime(kInvokeClosureNoSuchMethodRuntimeEntry, kNumArgs);
|
|
// noSuchMethod on closures always throws an error, so it will never return.
|
|
__ brk(0);
|
|
}
|
|
|
|
|
|
// R6: function object.
|
|
// R5: inline cache data object.
|
|
// Cannot use function object from ICData as it may be the inlined
|
|
// function and not the top-scope function.
|
|
void StubCode::GenerateOptimizedUsageCounterIncrement(Assembler* assembler) {
|
|
Register ic_reg = R5;
|
|
Register func_reg = R6;
|
|
if (FLAG_trace_optimized_ic_calls) {
|
|
__ EnterStubFrame();
|
|
__ Push(R6); // Preserve.
|
|
__ Push(R5); // Preserve.
|
|
__ Push(ic_reg); // Argument.
|
|
__ Push(func_reg); // Argument.
|
|
__ CallRuntime(kTraceICCallRuntimeEntry, 2);
|
|
__ Drop(2); // Discard argument;
|
|
__ Pop(R5); // Restore.
|
|
__ Pop(R6); // Restore.
|
|
__ LeaveStubFrame();
|
|
}
|
|
__ LoadFieldFromOffset(
|
|
R7, func_reg, Function::usage_counter_offset(), kWord);
|
|
__ add(R7, R7, Operand(1));
|
|
__ StoreFieldToOffset(
|
|
R7, func_reg, Function::usage_counter_offset(), kWord);
|
|
}
|
|
|
|
|
|
// Loads function into 'temp_reg'.
|
|
void StubCode::GenerateUsageCounterIncrement(Assembler* assembler,
|
|
Register temp_reg) {
|
|
if (FLAG_optimization_counter_threshold >= 0) {
|
|
Register ic_reg = R5;
|
|
Register func_reg = temp_reg;
|
|
ASSERT(temp_reg == R6);
|
|
__ Comment("Increment function counter");
|
|
__ LoadFieldFromOffset(func_reg, ic_reg, ICData::owner_offset());
|
|
__ LoadFieldFromOffset(
|
|
R7, func_reg, Function::usage_counter_offset(), kWord);
|
|
__ AddImmediate(R7, R7, 1);
|
|
__ StoreFieldToOffset(
|
|
R7, func_reg, Function::usage_counter_offset(), kWord);
|
|
}
|
|
}
|
|
|
|
|
|
// Note: R5 must be preserved.
|
|
// Attempt a quick Smi operation for known operations ('kind'). The ICData
|
|
// must have been primed with a Smi/Smi check that will be used for counting
|
|
// the invocations.
|
|
static void EmitFastSmiOp(Assembler* assembler,
|
|
Token::Kind kind,
|
|
intptr_t num_args,
|
|
Label* not_smi_or_overflow,
|
|
bool should_update_result_range) {
|
|
__ Comment("Fast Smi op");
|
|
if (FLAG_throw_on_javascript_int_overflow) {
|
|
// The overflow check is more complex than implemented below.
|
|
return;
|
|
}
|
|
__ ldr(R0, Address(SP, + 0 * kWordSize)); // Right.
|
|
__ ldr(R1, Address(SP, + 1 * kWordSize)); // Left.
|
|
__ orr(TMP, R0, Operand(R1));
|
|
__ tsti(TMP, Immediate(kSmiTagMask));
|
|
__ b(not_smi_or_overflow, NE);
|
|
switch (kind) {
|
|
case Token::kADD: {
|
|
__ adds(R0, R1, Operand(R0)); // Adds.
|
|
__ b(not_smi_or_overflow, VS); // Branch if overflow.
|
|
break;
|
|
}
|
|
case Token::kSUB: {
|
|
__ subs(R0, R1, Operand(R0)); // Subtract.
|
|
__ b(not_smi_or_overflow, VS); // Branch if overflow.
|
|
break;
|
|
}
|
|
case Token::kEQ: {
|
|
__ CompareRegisters(R0, R1);
|
|
__ LoadObject(R0, Bool::True());
|
|
__ LoadObject(R1, Bool::False());
|
|
__ csel(R0, R1, R0, NE);
|
|
break;
|
|
}
|
|
default: UNIMPLEMENTED();
|
|
}
|
|
|
|
if (should_update_result_range) {
|
|
Label done;
|
|
__ UpdateRangeFeedback(R0, 2, R5, R1, R6, &done);
|
|
__ Bind(&done);
|
|
}
|
|
|
|
// R5: IC data object (preserved).
|
|
__ LoadFieldFromOffset(R6, R5, ICData::ic_data_offset());
|
|
// R6: ic_data_array with check entries: classes and target functions.
|
|
__ AddImmediate(R6, R6, Array::data_offset() - kHeapObjectTag);
|
|
// R6: points directly to the first ic data array element.
|
|
#if defined(DEBUG)
|
|
// Check that first entry is for Smi/Smi.
|
|
Label error, ok;
|
|
const intptr_t imm_smi_cid = reinterpret_cast<intptr_t>(Smi::New(kSmiCid));
|
|
__ ldr(R1, Address(R6, 0));
|
|
__ CompareImmediate(R1, imm_smi_cid);
|
|
__ b(&error, NE);
|
|
__ ldr(R1, Address(R6, kWordSize));
|
|
__ CompareImmediate(R1, imm_smi_cid);
|
|
__ b(&ok, EQ);
|
|
__ Bind(&error);
|
|
__ Stop("Incorrect IC data");
|
|
__ Bind(&ok);
|
|
#endif
|
|
if (FLAG_optimization_counter_threshold >= 0) {
|
|
const intptr_t count_offset = ICData::CountIndexFor(num_args) * kWordSize;
|
|
// Update counter.
|
|
__ LoadFromOffset(R1, R6, count_offset);
|
|
__ adds(R1, R1, Operand(Smi::RawValue(1)));
|
|
__ LoadImmediate(R2, Smi::RawValue(Smi::kMaxValue));
|
|
__ csel(R1, R2, R1, VS); // Overflow.
|
|
__ StoreToOffset(R1, R6, count_offset);
|
|
}
|
|
|
|
__ ret();
|
|
}
|
|
|
|
|
|
// Generate inline cache check for 'num_args'.
|
|
// LR: return address.
|
|
// R5: inline cache data object.
|
|
// Control flow:
|
|
// - If receiver is null -> jump to IC miss.
|
|
// - If receiver is Smi -> load Smi class.
|
|
// - If receiver is not-Smi -> load receiver's class.
|
|
// - Check if 'num_args' (including receiver) match any IC data group.
|
|
// - Match found -> jump to target.
|
|
// - Match not found -> jump to IC miss.
|
|
void StubCode::GenerateNArgsCheckInlineCacheStub(
|
|
Assembler* assembler,
|
|
intptr_t num_args,
|
|
const RuntimeEntry& handle_ic_miss,
|
|
Token::Kind kind,
|
|
RangeCollectionMode range_collection_mode,
|
|
bool optimized) {
|
|
ASSERT(num_args > 0);
|
|
#if defined(DEBUG)
|
|
{ Label ok;
|
|
// Check that the IC data array has NumArgsTested() == num_args.
|
|
// 'NumArgsTested' is stored in the least significant bits of 'state_bits'.
|
|
__ LoadFromOffset(R6, R5, ICData::state_bits_offset() - kHeapObjectTag,
|
|
kUnsignedWord);
|
|
ASSERT(ICData::NumArgsTestedShift() == 0); // No shift needed.
|
|
__ andi(R6, R6, Immediate(ICData::NumArgsTestedMask()));
|
|
__ CompareImmediate(R6, num_args);
|
|
__ b(&ok, EQ);
|
|
__ Stop("Incorrect stub for IC data");
|
|
__ Bind(&ok);
|
|
}
|
|
#endif // DEBUG
|
|
|
|
Label stepping, done_stepping;
|
|
if (FLAG_support_debugger && !optimized) {
|
|
__ Comment("Check single stepping");
|
|
__ LoadIsolate(R6);
|
|
__ LoadFromOffset(
|
|
R6, R6, Isolate::single_step_offset(), kUnsignedByte);
|
|
__ CompareRegisters(R6, ZR);
|
|
__ b(&stepping, NE);
|
|
__ Bind(&done_stepping);
|
|
}
|
|
|
|
__ Comment("Range feedback collection");
|
|
Label not_smi_or_overflow;
|
|
if (range_collection_mode == kCollectRanges) {
|
|
ASSERT((num_args == 1) || (num_args == 2));
|
|
if (num_args == 2) {
|
|
__ ldr(R0, Address(SP, 1 * kWordSize));
|
|
__ UpdateRangeFeedback(R0, 0, R5, R1, R4, ¬_smi_or_overflow);
|
|
}
|
|
|
|
__ ldr(R0, Address(SP, 0 * kWordSize));
|
|
__ UpdateRangeFeedback(R0, num_args - 1, R5, R1, R4, ¬_smi_or_overflow);
|
|
}
|
|
if (kind != Token::kILLEGAL) {
|
|
EmitFastSmiOp(assembler,
|
|
kind,
|
|
num_args,
|
|
¬_smi_or_overflow,
|
|
(range_collection_mode == kCollectRanges));
|
|
}
|
|
__ Bind(¬_smi_or_overflow);
|
|
|
|
__ Comment("Extract ICData initial values and receiver cid");
|
|
// Load arguments descriptor into R4.
|
|
__ LoadFieldFromOffset(R4, R5, ICData::arguments_descriptor_offset());
|
|
// Loop that checks if there is an IC data match.
|
|
Label loop, update, test, found;
|
|
// R5: IC data object (preserved).
|
|
__ LoadFieldFromOffset(R6, R5, ICData::ic_data_offset());
|
|
// R6: ic_data_array with check entries: classes and target functions.
|
|
__ AddImmediate(R6, R6, Array::data_offset() - kHeapObjectTag);
|
|
// R6: points directly to the first ic data array element.
|
|
|
|
// Get the receiver's class ID (first read number of arguments from
|
|
// arguments descriptor array and then access the receiver from the stack).
|
|
__ LoadFieldFromOffset(R7, R4, ArgumentsDescriptor::count_offset());
|
|
__ SmiUntag(R7); // Untag so we can use the LSL 3 addressing mode.
|
|
__ sub(R7, R7, Operand(1));
|
|
|
|
// R0 <- [SP + (R7 << 3)]
|
|
__ ldr(R0, Address(SP, R7, UXTX, Address::Scaled));
|
|
__ LoadTaggedClassIdMayBeSmi(R0, R0);
|
|
|
|
// R7: argument_count - 1 (untagged).
|
|
// R0: receiver's class ID (smi).
|
|
__ ldr(R1, Address(R6)); // First class id (smi) to check.
|
|
__ b(&test);
|
|
|
|
__ Comment("ICData loop");
|
|
__ Bind(&loop);
|
|
for (int i = 0; i < num_args; i++) {
|
|
if (i > 0) {
|
|
// If not the first, load the next argument's class ID.
|
|
__ AddImmediate(R0, R7, -i);
|
|
// R0 <- [SP + (R0 << 3)]
|
|
__ ldr(R0, Address(SP, R0, UXTX, Address::Scaled));
|
|
__ LoadTaggedClassIdMayBeSmi(R0, R0);
|
|
// R0: next argument class ID (smi).
|
|
__ LoadFromOffset(R1, R6, i * kWordSize);
|
|
// R1: next class ID to check (smi).
|
|
}
|
|
__ CompareRegisters(R0, R1); // Class id match?
|
|
if (i < (num_args - 1)) {
|
|
__ b(&update, NE); // Continue.
|
|
} else {
|
|
// Last check, all checks before matched.
|
|
__ b(&found, EQ); // Break.
|
|
}
|
|
}
|
|
__ Bind(&update);
|
|
// Reload receiver class ID. It has not been destroyed when num_args == 1.
|
|
if (num_args > 1) {
|
|
__ ldr(R0, Address(SP, R7, UXTX, Address::Scaled));
|
|
__ LoadTaggedClassIdMayBeSmi(R0, R0);
|
|
}
|
|
|
|
const intptr_t entry_size = ICData::TestEntryLengthFor(num_args) * kWordSize;
|
|
__ AddImmediate(R6, R6, entry_size); // Next entry.
|
|
__ ldr(R1, Address(R6)); // Next class ID.
|
|
|
|
__ Bind(&test);
|
|
__ CompareImmediate(R1, Smi::RawValue(kIllegalCid)); // Done?
|
|
__ b(&loop, NE);
|
|
|
|
__ Comment("IC miss");
|
|
// Compute address of arguments.
|
|
// R7: argument_count - 1 (untagged).
|
|
// R7 <- SP + (R7 << 3)
|
|
__ add(R7, SP, Operand(R7, UXTX, 3)); // R7 is Untagged.
|
|
// R7: address of receiver.
|
|
// Create a stub frame as we are pushing some objects on the stack before
|
|
// calling into the runtime.
|
|
__ EnterStubFrame();
|
|
// Preserve IC data object and arguments descriptor array and
|
|
// setup space on stack for result (target code object).
|
|
__ Push(R4); // Preserve arguments descriptor array.
|
|
__ Push(R5); // Preserve IC Data.
|
|
// Setup space on stack for the result (target code object).
|
|
__ PushObject(Object::null_object());
|
|
// Push call arguments.
|
|
for (intptr_t i = 0; i < num_args; i++) {
|
|
__ LoadFromOffset(TMP, R7, -i * kWordSize);
|
|
__ Push(TMP);
|
|
}
|
|
// Pass IC data object.
|
|
__ Push(R5);
|
|
__ CallRuntime(handle_ic_miss, num_args + 1);
|
|
// Remove the call arguments pushed earlier, including the IC data object.
|
|
__ Drop(num_args + 1);
|
|
// Pop returned function object into R0.
|
|
// Restore arguments descriptor array and IC data array.
|
|
__ Pop(R0); // Pop returned function object into R0.
|
|
__ Pop(R5); // Restore IC Data.
|
|
__ Pop(R4); // Restore arguments descriptor array.
|
|
if (range_collection_mode == kCollectRanges) {
|
|
__ RestoreCodePointer();
|
|
}
|
|
__ LeaveStubFrame();
|
|
Label call_target_function;
|
|
if (!FLAG_lazy_dispatchers) {
|
|
GenerateDispatcherCode(assembler, &call_target_function);
|
|
} else {
|
|
__ b(&call_target_function);
|
|
}
|
|
|
|
__ Bind(&found);
|
|
__ Comment("Update caller's counter");
|
|
// R6: pointer to an IC data check group.
|
|
const intptr_t target_offset = ICData::TargetIndexFor(num_args) * kWordSize;
|
|
const intptr_t count_offset = ICData::CountIndexFor(num_args) * kWordSize;
|
|
__ LoadFromOffset(R0, R6, target_offset);
|
|
|
|
if (FLAG_optimization_counter_threshold >= 0) {
|
|
// Update counter.
|
|
__ LoadFromOffset(R1, R6, count_offset);
|
|
__ adds(R1, R1, Operand(Smi::RawValue(1)));
|
|
__ LoadImmediate(R2, Smi::RawValue(Smi::kMaxValue));
|
|
__ csel(R1, R2, R1, VS); // Overflow.
|
|
__ StoreToOffset(R1, R6, count_offset);
|
|
}
|
|
|
|
__ Comment("Call target");
|
|
__ Bind(&call_target_function);
|
|
// R0: target function.
|
|
if (range_collection_mode == kCollectRanges) {
|
|
__ LoadFieldFromOffset(R2, R0, Function::entry_point_offset());
|
|
__ ldr(R1, Address(SP, 0 * kWordSize));
|
|
if (num_args == 2) {
|
|
__ ldr(R3, Address(SP, 1 * kWordSize));
|
|
}
|
|
__ EnterStubFrame();
|
|
__ Push(R5);
|
|
if (num_args == 2) {
|
|
__ Push(R3);
|
|
}
|
|
__ Push(R1);
|
|
__ LoadFieldFromOffset(CODE_REG, R0, Function::code_offset());
|
|
__ blr(R2);
|
|
|
|
Label done;
|
|
__ ldr(R5, Address(FP, kFirstLocalSlotFromFp * kWordSize));
|
|
__ UpdateRangeFeedback(R0, 2, R5, R1, R4, &done);
|
|
__ Bind(&done);
|
|
__ LeaveStubFrame();
|
|
__ ret();
|
|
} else {
|
|
__ LoadFieldFromOffset(CODE_REG, R0, Function::code_offset());
|
|
__ LoadFieldFromOffset(R2, R0, Function::entry_point_offset());
|
|
__ br(R2);
|
|
}
|
|
|
|
if (FLAG_support_debugger && !optimized) {
|
|
__ Bind(&stepping);
|
|
__ EnterStubFrame();
|
|
__ Push(R5); // Preserve IC data.
|
|
__ CallRuntime(kSingleStepHandlerRuntimeEntry, 0);
|
|
__ Pop(R5);
|
|
__ RestoreCodePointer();
|
|
__ LeaveStubFrame();
|
|
__ b(&done_stepping);
|
|
}
|
|
}
|
|
|
|
|
|
// Use inline cache data array to invoke the target or continue in inline
|
|
// cache miss handler. Stub for 1-argument check (receiver class).
|
|
// LR: return address.
|
|
// R5: inline cache data object.
|
|
// Inline cache data object structure:
|
|
// 0: function-name
|
|
// 1: N, number of arguments checked.
|
|
// 2 .. (length - 1): group of checks, each check containing:
|
|
// - N classes.
|
|
// - 1 target function.
|
|
void StubCode::GenerateOneArgCheckInlineCacheStub(Assembler* assembler) {
|
|
GenerateUsageCounterIncrement(assembler, R6);
|
|
GenerateNArgsCheckInlineCacheStub(assembler, 1,
|
|
kInlineCacheMissHandlerOneArgRuntimeEntry, Token::kILLEGAL,
|
|
kIgnoreRanges);
|
|
}
|
|
|
|
|
|
void StubCode::GenerateTwoArgsCheckInlineCacheStub(Assembler* assembler) {
|
|
GenerateUsageCounterIncrement(assembler, R6);
|
|
GenerateNArgsCheckInlineCacheStub(assembler, 2,
|
|
kInlineCacheMissHandlerTwoArgsRuntimeEntry, Token::kILLEGAL,
|
|
kIgnoreRanges);
|
|
}
|
|
|
|
|
|
void StubCode::GenerateSmiAddInlineCacheStub(Assembler* assembler) {
|
|
GenerateUsageCounterIncrement(assembler, R6);
|
|
GenerateNArgsCheckInlineCacheStub(assembler, 2,
|
|
kInlineCacheMissHandlerTwoArgsRuntimeEntry, Token::kADD,
|
|
kCollectRanges);
|
|
}
|
|
|
|
|
|
void StubCode::GenerateSmiSubInlineCacheStub(Assembler* assembler) {
|
|
GenerateUsageCounterIncrement(assembler, R6);
|
|
GenerateNArgsCheckInlineCacheStub(assembler, 2,
|
|
kInlineCacheMissHandlerTwoArgsRuntimeEntry, Token::kSUB,
|
|
kCollectRanges);
|
|
}
|
|
|
|
|
|
void StubCode::GenerateSmiEqualInlineCacheStub(Assembler* assembler) {
|
|
GenerateUsageCounterIncrement(assembler, R6);
|
|
GenerateNArgsCheckInlineCacheStub(assembler, 2,
|
|
kInlineCacheMissHandlerTwoArgsRuntimeEntry, Token::kEQ,
|
|
kIgnoreRanges);
|
|
}
|
|
|
|
|
|
void StubCode::GenerateUnaryRangeCollectingInlineCacheStub(
|
|
Assembler* assembler) {
|
|
GenerateUsageCounterIncrement(assembler, R6);
|
|
GenerateNArgsCheckInlineCacheStub(assembler, 1,
|
|
kInlineCacheMissHandlerOneArgRuntimeEntry,
|
|
Token::kILLEGAL,
|
|
kCollectRanges);
|
|
}
|
|
|
|
|
|
void StubCode::GenerateBinaryRangeCollectingInlineCacheStub(
|
|
Assembler* assembler) {
|
|
GenerateUsageCounterIncrement(assembler, R6);
|
|
GenerateNArgsCheckInlineCacheStub(assembler, 2,
|
|
kInlineCacheMissHandlerTwoArgsRuntimeEntry,
|
|
Token::kILLEGAL,
|
|
kCollectRanges);
|
|
}
|
|
|
|
|
|
void StubCode::GenerateOneArgOptimizedCheckInlineCacheStub(
|
|
Assembler* assembler) {
|
|
GenerateOptimizedUsageCounterIncrement(assembler);
|
|
GenerateNArgsCheckInlineCacheStub(assembler, 1,
|
|
kInlineCacheMissHandlerOneArgRuntimeEntry, Token::kILLEGAL,
|
|
kIgnoreRanges, true /* optimized */);
|
|
}
|
|
|
|
|
|
void StubCode::GenerateTwoArgsOptimizedCheckInlineCacheStub(
|
|
Assembler* assembler) {
|
|
GenerateOptimizedUsageCounterIncrement(assembler);
|
|
GenerateNArgsCheckInlineCacheStub(assembler, 2,
|
|
kInlineCacheMissHandlerTwoArgsRuntimeEntry, Token::kILLEGAL,
|
|
kIgnoreRanges, true /* optimized */);
|
|
}
|
|
|
|
|
|
void StubCode::GenerateZeroArgsUnoptimizedStaticCallStub(Assembler* assembler) {
|
|
GenerateUsageCounterIncrement(assembler, R6);
|
|
#if defined(DEBUG)
|
|
{ Label ok;
|
|
// Check that the IC data array has NumArgsTested() == 0.
|
|
// 'NumArgsTested' is stored in the least significant bits of 'state_bits'.
|
|
__ LoadFromOffset(R6, R5, ICData::state_bits_offset() - kHeapObjectTag,
|
|
kUnsignedWord);
|
|
ASSERT(ICData::NumArgsTestedShift() == 0); // No shift needed.
|
|
__ andi(R6, R6, Immediate(ICData::NumArgsTestedMask()));
|
|
__ CompareImmediate(R6, 0);
|
|
__ b(&ok, EQ);
|
|
__ Stop("Incorrect IC data for unoptimized static call");
|
|
__ Bind(&ok);
|
|
}
|
|
#endif // DEBUG
|
|
|
|
// Check single stepping.
|
|
Label stepping, done_stepping;
|
|
if (FLAG_support_debugger) {
|
|
__ LoadIsolate(R6);
|
|
__ LoadFromOffset(
|
|
R6, R6, Isolate::single_step_offset(), kUnsignedByte);
|
|
__ CompareImmediate(R6, 0);
|
|
__ b(&stepping, NE);
|
|
__ Bind(&done_stepping);
|
|
}
|
|
|
|
// R5: IC data object (preserved).
|
|
__ LoadFieldFromOffset(R6, R5, ICData::ic_data_offset());
|
|
// R6: ic_data_array with entries: target functions and count.
|
|
__ AddImmediate(R6, R6, Array::data_offset() - kHeapObjectTag);
|
|
// R6: points directly to the first ic data array element.
|
|
const intptr_t target_offset = ICData::TargetIndexFor(0) * kWordSize;
|
|
const intptr_t count_offset = ICData::CountIndexFor(0) * kWordSize;
|
|
|
|
if (FLAG_optimization_counter_threshold >= 0) {
|
|
// Increment count for this call.
|
|
__ LoadFromOffset(R1, R6, count_offset);
|
|
__ adds(R1, R1, Operand(Smi::RawValue(1)));
|
|
__ LoadImmediate(R2, Smi::RawValue(Smi::kMaxValue));
|
|
__ csel(R1, R2, R1, VS); // Overflow.
|
|
__ StoreToOffset(R1, R6, count_offset);
|
|
}
|
|
|
|
// Load arguments descriptor into R4.
|
|
__ LoadFieldFromOffset(R4, R5, ICData::arguments_descriptor_offset());
|
|
|
|
// Get function and call it, if possible.
|
|
__ LoadFromOffset(R0, R6, target_offset);
|
|
__ LoadFieldFromOffset(CODE_REG, R0, Function::code_offset());
|
|
__ LoadFieldFromOffset(R2, R0, Function::entry_point_offset());
|
|
__ br(R2);
|
|
|
|
if (FLAG_support_debugger) {
|
|
__ Bind(&stepping);
|
|
__ EnterStubFrame();
|
|
__ Push(R5); // Preserve IC data.
|
|
__ CallRuntime(kSingleStepHandlerRuntimeEntry, 0);
|
|
__ Pop(R5);
|
|
__ RestoreCodePointer();
|
|
__ LeaveStubFrame();
|
|
__ b(&done_stepping);
|
|
}
|
|
}
|
|
|
|
|
|
void StubCode::GenerateOneArgUnoptimizedStaticCallStub(Assembler* assembler) {
|
|
GenerateUsageCounterIncrement(assembler, R6);
|
|
GenerateNArgsCheckInlineCacheStub(
|
|
assembler, 1, kStaticCallMissHandlerOneArgRuntimeEntry, Token::kILLEGAL,
|
|
kIgnoreRanges);
|
|
}
|
|
|
|
|
|
void StubCode::GenerateTwoArgsUnoptimizedStaticCallStub(Assembler* assembler) {
|
|
GenerateUsageCounterIncrement(assembler, R6);
|
|
GenerateNArgsCheckInlineCacheStub(assembler, 2,
|
|
kStaticCallMissHandlerTwoArgsRuntimeEntry, Token::kILLEGAL,
|
|
kIgnoreRanges);
|
|
}
|
|
|
|
|
|
// Stub for compiling a function and jumping to the compiled code.
|
|
// R5: IC-Data (for methods).
|
|
// R4: Arguments descriptor.
|
|
// R0: Function.
|
|
void StubCode::GenerateLazyCompileStub(Assembler* assembler) {
|
|
// Preserve arg desc. and IC data object.
|
|
__ EnterStubFrame();
|
|
__ Push(R5); // Save IC Data.
|
|
__ Push(R4); // Save arg. desc.
|
|
__ Push(R0); // Pass function.
|
|
__ CallRuntime(kCompileFunctionRuntimeEntry, 1);
|
|
__ Pop(R0); // Restore argument.
|
|
__ Pop(R4); // Restore arg desc.
|
|
__ Pop(R5); // Restore IC Data.
|
|
__ LeaveStubFrame();
|
|
|
|
__ LoadFieldFromOffset(CODE_REG, R0, Function::code_offset());
|
|
__ LoadFieldFromOffset(R2, R0, Function::entry_point_offset());
|
|
__ br(R2);
|
|
}
|
|
|
|
|
|
// R5: Contains an ICData.
|
|
void StubCode::GenerateICCallBreakpointStub(Assembler* assembler) {
|
|
__ EnterStubFrame();
|
|
__ Push(R5);
|
|
__ PushObject(Object::null_object()); // Space for result.
|
|
__ CallRuntime(kBreakpointRuntimeHandlerRuntimeEntry, 0);
|
|
__ Pop(CODE_REG);
|
|
__ Pop(R5);
|
|
__ LeaveStubFrame();
|
|
__ LoadFieldFromOffset(R0, CODE_REG, Code::entry_point_offset());
|
|
__ br(R0);
|
|
}
|
|
|
|
|
|
void StubCode::GenerateRuntimeCallBreakpointStub(Assembler* assembler) {
|
|
__ EnterStubFrame();
|
|
__ PushObject(Object::null_object()); // Space for result.
|
|
__ CallRuntime(kBreakpointRuntimeHandlerRuntimeEntry, 0);
|
|
__ Pop(CODE_REG);
|
|
__ LeaveStubFrame();
|
|
__ LoadFieldFromOffset(R0, CODE_REG, Code::entry_point_offset());
|
|
__ br(R0);
|
|
}
|
|
|
|
// Called only from unoptimized code. All relevant registers have been saved.
|
|
void StubCode::GenerateDebugStepCheckStub(
|
|
Assembler* assembler) {
|
|
// Check single stepping.
|
|
Label stepping, done_stepping;
|
|
__ LoadIsolate(R1);
|
|
__ LoadFromOffset(
|
|
R1, R1, Isolate::single_step_offset(), kUnsignedByte);
|
|
__ CompareImmediate(R1, 0);
|
|
__ b(&stepping, NE);
|
|
__ Bind(&done_stepping);
|
|
|
|
__ ret();
|
|
|
|
__ Bind(&stepping);
|
|
__ EnterStubFrame();
|
|
__ CallRuntime(kSingleStepHandlerRuntimeEntry, 0);
|
|
__ LeaveStubFrame();
|
|
__ b(&done_stepping);
|
|
}
|
|
|
|
|
|
// Used to check class and type arguments. Arguments passed in registers:
|
|
// LR: return address.
|
|
// R0: instance (must be preserved).
|
|
// R1: instantiator type arguments or NULL.
|
|
// R2: cache array.
|
|
// Result in R1: null -> not found, otherwise result (true or false).
|
|
static void GenerateSubtypeNTestCacheStub(Assembler* assembler, int n) {
|
|
ASSERT((1 <= n) && (n <= 3));
|
|
if (n > 1) {
|
|
// Get instance type arguments.
|
|
__ LoadClass(R3, R0);
|
|
// Compute instance type arguments into R4.
|
|
Label has_no_type_arguments;
|
|
__ LoadObject(R4, Object::null_object());
|
|
__ LoadFieldFromOffset(R5, R3,
|
|
Class::type_arguments_field_offset_in_words_offset(), kWord);
|
|
__ CompareImmediate(R5, Class::kNoTypeArguments);
|
|
__ b(&has_no_type_arguments, EQ);
|
|
__ add(R5, R0, Operand(R5, LSL, 3));
|
|
__ LoadFieldFromOffset(R4, R5, 0);
|
|
__ Bind(&has_no_type_arguments);
|
|
}
|
|
__ LoadClassId(R3, R0);
|
|
// R0: instance.
|
|
// R1: instantiator type arguments or NULL.
|
|
// R2: SubtypeTestCache.
|
|
// R3: instance class id.
|
|
// R4: instance type arguments (null if none), used only if n > 1.
|
|
__ LoadFieldFromOffset(R2, R2, SubtypeTestCache::cache_offset());
|
|
__ AddImmediate(R2, R2, Array::data_offset() - kHeapObjectTag);
|
|
|
|
Label loop, found, not_found, next_iteration;
|
|
// R2: entry start.
|
|
// R3: instance class id.
|
|
// R4: instance type arguments.
|
|
__ SmiTag(R3);
|
|
__ CompareImmediate(R3, Smi::RawValue(kClosureCid));
|
|
__ b(&loop, NE);
|
|
__ LoadFieldFromOffset(R3, R0, Closure::function_offset());
|
|
// R3: instance class id as Smi or function.
|
|
__ Bind(&loop);
|
|
__ LoadFromOffset(
|
|
R5, R2, kWordSize * SubtypeTestCache::kInstanceClassIdOrFunction);
|
|
__ CompareObject(R5, Object::null_object());
|
|
__ b(¬_found, EQ);
|
|
__ CompareRegisters(R5, R3);
|
|
if (n == 1) {
|
|
__ b(&found, EQ);
|
|
} else {
|
|
__ b(&next_iteration, NE);
|
|
__ LoadFromOffset(
|
|
R5, R2, kWordSize * SubtypeTestCache::kInstanceTypeArguments);
|
|
__ CompareRegisters(R5, R4);
|
|
if (n == 2) {
|
|
__ b(&found, EQ);
|
|
} else {
|
|
__ b(&next_iteration, NE);
|
|
__ LoadFromOffset(R5, R2,
|
|
kWordSize * SubtypeTestCache::kInstantiatorTypeArguments);
|
|
__ CompareRegisters(R5, R1);
|
|
__ b(&found, EQ);
|
|
}
|
|
}
|
|
__ Bind(&next_iteration);
|
|
__ AddImmediate(
|
|
R2, R2, kWordSize * SubtypeTestCache::kTestEntryLength);
|
|
__ b(&loop);
|
|
// Fall through to not found.
|
|
__ Bind(¬_found);
|
|
__ LoadObject(R1, Object::null_object());
|
|
__ ret();
|
|
|
|
__ Bind(&found);
|
|
__ LoadFromOffset(R1, R2, kWordSize * SubtypeTestCache::kTestResult);
|
|
__ ret();
|
|
}
|
|
|
|
|
|
// Used to check class and type arguments. Arguments passed on stack:
|
|
// TOS + 0: return address.
|
|
// TOS + 1: instantiator type arguments or NULL.
|
|
// TOS + 2: instance.
|
|
// TOS + 3: cache array.
|
|
// Result in RCX: null -> not found, otherwise result (true or false).
|
|
void StubCode::GenerateSubtype1TestCacheStub(Assembler* assembler) {
|
|
GenerateSubtypeNTestCacheStub(assembler, 1);
|
|
}
|
|
|
|
|
|
// Used to check class and type arguments. Arguments passed in registers:
|
|
// LR: return address.
|
|
// R0: instance (must be preserved).
|
|
// R1: instantiator type arguments or NULL.
|
|
// R2: cache array.
|
|
// Result in R1: null -> not found, otherwise result (true or false).
|
|
void StubCode::GenerateSubtype2TestCacheStub(Assembler* assembler) {
|
|
GenerateSubtypeNTestCacheStub(assembler, 2);
|
|
}
|
|
|
|
|
|
// Used to check class and type arguments. Arguments passed on stack:
|
|
// TOS + 0: return address.
|
|
// TOS + 1: instantiator type arguments.
|
|
// TOS + 2: instance.
|
|
// TOS + 3: cache array.
|
|
// Result in RCX: null -> not found, otherwise result (true or false).
|
|
void StubCode::GenerateSubtype3TestCacheStub(Assembler* assembler) {
|
|
GenerateSubtypeNTestCacheStub(assembler, 3);
|
|
}
|
|
|
|
|
|
void StubCode::GenerateGetStackPointerStub(Assembler* assembler) {
|
|
__ mov(R0, SP);
|
|
__ ret();
|
|
}
|
|
|
|
|
|
// Jump to the exception or error handler.
|
|
// LR: return address.
|
|
// R0: program_counter.
|
|
// R1: stack_pointer.
|
|
// R2: frame_pointer.
|
|
// R3: error object.
|
|
// R4: address of stacktrace object.
|
|
// R5: thread.
|
|
// Does not return.
|
|
void StubCode::GenerateJumpToExceptionHandlerStub(Assembler* assembler) {
|
|
ASSERT(kExceptionObjectReg == R0);
|
|
ASSERT(kStackTraceObjectReg == R1);
|
|
__ mov(LR, R0); // Program counter.
|
|
__ mov(SP, R1); // Stack pointer.
|
|
__ mov(FP, R2); // Frame_pointer.
|
|
__ mov(R0, R3); // Exception object.
|
|
__ mov(R1, R4); // StackTrace object.
|
|
__ mov(THR, R5);
|
|
// Set the tag.
|
|
__ LoadImmediate(R2, VMTag::kDartTagId);
|
|
__ StoreToOffset(R2, THR, Thread::vm_tag_offset());
|
|
// Clear top exit frame.
|
|
__ StoreToOffset(ZR, THR, Thread::top_exit_frame_info_offset());
|
|
__ ret(); // Jump to the exception handler code.
|
|
}
|
|
|
|
|
|
// Calls to the runtime to optimize the given function.
|
|
// R6: function to be re-optimized.
|
|
// R4: argument descriptor (preserved).
|
|
void StubCode::GenerateOptimizeFunctionStub(Assembler* assembler) {
|
|
__ EnterStubFrame();
|
|
__ Push(R4);
|
|
// Setup space on stack for the return value.
|
|
__ PushObject(Object::null_object());
|
|
__ Push(R6);
|
|
__ CallRuntime(kOptimizeInvokedFunctionRuntimeEntry, 1);
|
|
__ Pop(R0); // Discard argument.
|
|
__ Pop(CODE_REG); // Get Code object
|
|
__ Pop(R4); // Restore argument descriptor.
|
|
__ LoadFieldFromOffset(R0, CODE_REG, Code::entry_point_offset());
|
|
__ LeaveStubFrame();
|
|
__ br(R0);
|
|
__ brk(0);
|
|
}
|
|
|
|
|
|
// Does identical check (object references are equal or not equal) with special
|
|
// checks for boxed numbers.
|
|
// Left and right are pushed on stack.
|
|
// Return Zero condition flag set if equal.
|
|
// Note: A Mint cannot contain a value that would fit in Smi, a Bigint
|
|
// cannot contain a value that fits in Mint or Smi.
|
|
static void GenerateIdenticalWithNumberCheckStub(Assembler* assembler,
|
|
const Register left,
|
|
const Register right) {
|
|
Label reference_compare, done, check_mint, check_bigint;
|
|
// If any of the arguments is Smi do reference compare.
|
|
__ tsti(left, Immediate(kSmiTagMask));
|
|
__ b(&reference_compare, EQ);
|
|
__ tsti(right, Immediate(kSmiTagMask));
|
|
__ b(&reference_compare, EQ);
|
|
|
|
// Value compare for two doubles.
|
|
__ CompareClassId(left, kDoubleCid);
|
|
__ b(&check_mint, NE);
|
|
__ CompareClassId(right, kDoubleCid);
|
|
__ b(&done, NE);
|
|
|
|
// Double values bitwise compare.
|
|
__ LoadFieldFromOffset(left, left, Double::value_offset());
|
|
__ LoadFieldFromOffset(right, right, Double::value_offset());
|
|
__ CompareRegisters(left, right);
|
|
__ b(&done);
|
|
|
|
__ Bind(&check_mint);
|
|
__ CompareClassId(left, kMintCid);
|
|
__ b(&check_bigint, NE);
|
|
__ CompareClassId(right, kMintCid);
|
|
__ b(&done, NE);
|
|
__ LoadFieldFromOffset(left, left, Mint::value_offset());
|
|
__ LoadFieldFromOffset(right, right, Mint::value_offset());
|
|
__ b(&done);
|
|
|
|
__ Bind(&check_bigint);
|
|
__ CompareClassId(left, kBigintCid);
|
|
__ b(&reference_compare, NE);
|
|
__ CompareClassId(right, kBigintCid);
|
|
__ b(&done, NE);
|
|
__ EnterStubFrame();
|
|
__ ReserveAlignedFrameSpace(2 * kWordSize);
|
|
__ StoreToOffset(left, SP, 0 * kWordSize);
|
|
__ StoreToOffset(right, SP, 1 * kWordSize);
|
|
__ CallRuntime(kBigintCompareRuntimeEntry, 2);
|
|
// Result in R0, 0 means equal.
|
|
__ LeaveStubFrame();
|
|
__ cmp(R0, Operand(0));
|
|
__ b(&done);
|
|
|
|
__ Bind(&reference_compare);
|
|
__ CompareRegisters(left, right);
|
|
__ Bind(&done);
|
|
}
|
|
|
|
|
|
// Called only from unoptimized code. All relevant registers have been saved.
|
|
// LR: return address.
|
|
// SP + 4: left operand.
|
|
// SP + 0: right operand.
|
|
// Return Zero condition flag set if equal.
|
|
void StubCode::GenerateUnoptimizedIdenticalWithNumberCheckStub(
|
|
Assembler* assembler) {
|
|
// Check single stepping.
|
|
Label stepping, done_stepping;
|
|
if (FLAG_support_debugger) {
|
|
__ LoadIsolate(R1);
|
|
__ LoadFromOffset(R1, R1, Isolate::single_step_offset(), kUnsignedByte);
|
|
__ CompareImmediate(R1, 0);
|
|
__ b(&stepping, NE);
|
|
__ Bind(&done_stepping);
|
|
}
|
|
|
|
const Register left = R1;
|
|
const Register right = R0;
|
|
__ LoadFromOffset(left, SP, 1 * kWordSize);
|
|
__ LoadFromOffset(right, SP, 0 * kWordSize);
|
|
GenerateIdenticalWithNumberCheckStub(assembler, left, right);
|
|
__ ret();
|
|
|
|
if (FLAG_support_debugger) {
|
|
__ Bind(&stepping);
|
|
__ EnterStubFrame();
|
|
__ CallRuntime(kSingleStepHandlerRuntimeEntry, 0);
|
|
__ RestoreCodePointer();
|
|
__ LeaveStubFrame();
|
|
__ b(&done_stepping);
|
|
}
|
|
}
|
|
|
|
|
|
// Called from optimized code only.
|
|
// LR: return address.
|
|
// SP + 4: left operand.
|
|
// SP + 0: right operand.
|
|
// Return Zero condition flag set if equal.
|
|
void StubCode::GenerateOptimizedIdenticalWithNumberCheckStub(
|
|
Assembler* assembler) {
|
|
const Register left = R1;
|
|
const Register right = R0;
|
|
__ LoadFromOffset(left, SP, 1 * kWordSize);
|
|
__ LoadFromOffset(right, SP, 0 * kWordSize);
|
|
GenerateIdenticalWithNumberCheckStub(assembler, left, right);
|
|
__ ret();
|
|
}
|
|
|
|
|
|
void StubCode::EmitMegamorphicLookup(Assembler* assembler) {
|
|
__ LoadTaggedClassIdMayBeSmi(R0, R0);
|
|
// R0: class ID of the receiver (smi).
|
|
__ ldr(R4, FieldAddress(R5, MegamorphicCache::arguments_descriptor_offset()));
|
|
__ ldr(R2, FieldAddress(R5, MegamorphicCache::buckets_offset()));
|
|
__ ldr(R1, FieldAddress(R5, MegamorphicCache::mask_offset()));
|
|
// R2: cache buckets array.
|
|
// R1: mask.
|
|
__ mov(R3, R0);
|
|
// R3: probe.
|
|
|
|
Label loop, update, load_target_function;
|
|
__ b(&loop);
|
|
|
|
__ Bind(&update);
|
|
__ add(R3, R3, Operand(Smi::RawValue(1)));
|
|
__ Bind(&loop);
|
|
__ and_(R3, R3, Operand(R1));
|
|
const intptr_t base = Array::data_offset();
|
|
// R3 is smi tagged, but table entries are 16 bytes, so LSL 3.
|
|
__ add(TMP, R2, Operand(R3, LSL, 3));
|
|
__ ldr(R6, FieldAddress(TMP, base));
|
|
|
|
ASSERT(kIllegalCid == 0);
|
|
__ tst(R6, Operand(R6));
|
|
__ b(&load_target_function, EQ);
|
|
__ CompareRegisters(R6, R0);
|
|
__ b(&update, NE);
|
|
|
|
__ Bind(&load_target_function);
|
|
// Call the target found in the cache. For a class id match, this is a
|
|
// proper target for the given name and arguments descriptor. If the
|
|
// illegal class id was found, the target is a cache miss handler that can
|
|
// be invoked as a normal Dart function.
|
|
__ add(TMP, R2, Operand(R3, LSL, 3));
|
|
__ ldr(R0, FieldAddress(TMP, base + kWordSize));
|
|
__ ldr(R1, FieldAddress(R0, Function::entry_point_offset()));
|
|
__ ldr(CODE_REG, FieldAddress(R0, Function::code_offset()));
|
|
}
|
|
|
|
|
|
// Called from megamorphic calls.
|
|
// R0: receiver
|
|
// R5: MegamorphicCache (preserved)
|
|
// Result:
|
|
// R1: target entry point
|
|
// CODE_REG: target Code
|
|
// R4: arguments descriptor
|
|
void StubCode::GenerateMegamorphicLookupStub(Assembler* assembler) {
|
|
EmitMegamorphicLookup(assembler);
|
|
__ ret();
|
|
}
|
|
|
|
|
|
// Called from switchable IC calls.
|
|
// R0: receiver
|
|
// R5: ICData (preserved)
|
|
// Result:
|
|
// R1: target entry point
|
|
// CODE_REG: target Code object
|
|
// R4: arguments descriptor
|
|
void StubCode::GenerateICLookupStub(Assembler* assembler) {
|
|
Label loop, found, miss;
|
|
__ ldr(R4, FieldAddress(R5, ICData::arguments_descriptor_offset()));
|
|
__ ldr(R8, FieldAddress(R5, ICData::ic_data_offset()));
|
|
__ AddImmediate(R8, R8, Array::data_offset() - kHeapObjectTag);
|
|
// R8: first IC entry
|
|
__ LoadTaggedClassIdMayBeSmi(R1, R0);
|
|
// R1: receiver cid as Smi
|
|
|
|
__ Bind(&loop);
|
|
__ ldr(R2, Address(R8, 0));
|
|
__ cmp(R1, Operand(R2));
|
|
__ b(&found, EQ);
|
|
__ CompareImmediate(R2, Smi::RawValue(kIllegalCid));
|
|
__ b(&miss, EQ);
|
|
|
|
const intptr_t entry_length = ICData::TestEntryLengthFor(1) * kWordSize;
|
|
__ AddImmediate(R8, R8, entry_length); // Next entry.
|
|
__ b(&loop);
|
|
|
|
__ Bind(&found);
|
|
const intptr_t target_offset = ICData::TargetIndexFor(1) * kWordSize;
|
|
__ ldr(R0, Address(R8, target_offset));
|
|
__ ldr(R1, FieldAddress(R0, Function::entry_point_offset()));
|
|
__ ldr(CODE_REG, FieldAddress(R0, Function::code_offset()));
|
|
__ ret();
|
|
|
|
__ Bind(&miss);
|
|
__ LoadIsolate(R2);
|
|
__ ldr(CODE_REG, Address(R2, Isolate::ic_miss_code_offset()));
|
|
__ ldr(R1, FieldAddress(CODE_REG, Code::entry_point_offset()));
|
|
__ ret();
|
|
}
|
|
|
|
} // namespace dart
|
|
|
|
#endif // defined TARGET_ARCH_ARM64
|