regis@google.com
5282e44fb2
type when possible. Fix type finalization of type parameters (always finalize in the context of the class being parameterized and not in the enclosing class where the type parameter is used). Fix wrong generic optimization and added a test (a generic type instantiated from a raw instantiator is not always raw). Added printing of type argument vectors. Review URL: https://chromiumcodereview.appspot.com//9939003 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@6068 260f80e4-7a28-3924-810f-c04153c831b5
1739 lines
65 KiB
C++
1739 lines
65 KiB
C++
// Copyright (c) 2012, 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_X64)
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#include "vm/code_generator.h"
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#include "vm/compiler.h"
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#include "vm/object_store.h"
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#include "vm/pages.h"
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#include "vm/resolver.h"
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#include "vm/scavenger.h"
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#include "vm/stub_code.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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// Input parameters:
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// RSP : points to return address.
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// RSP + 8 : address of last argument in argument array.
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// RSP + 8*R10 : address of first argument in argument array.
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// RSP + 8*R10 + 8 : address of return value.
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// RBX : address of the runtime function to call.
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// R10 : number of arguments to the call.
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// Must preserve callee saved registers R12 and R13.
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static void GenerateCallRuntimeStub(Assembler* assembler) {
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ASSERT((R12 != CTX) && (R13 != CTX));
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const intptr_t isolate_offset = NativeArguments::isolate_offset();
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const intptr_t argc_offset = NativeArguments::argc_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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__ EnterFrame(0);
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// Load current Isolate pointer from Context structure into RAX.
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__ movq(RAX, FieldAddress(CTX, Context::isolate_offset()));
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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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__ movq(Address(RAX, Isolate::top_exit_frame_info_offset()), RSP);
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// Save current Context pointer into Isolate structure.
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__ movq(Address(RAX, Isolate::top_context_offset()), CTX);
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// Cache Isolate pointer into CTX while executing runtime code.
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__ movq(CTX, RAX);
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// Reserve space for arguments and align frame before entering C++ world.
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__ AddImmediate(RSP, Immediate(-sizeof(NativeArguments)));
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if (OS::ActivationFrameAlignment() > 0) {
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__ andq(RSP, Immediate(~(OS::ActivationFrameAlignment() - 1)));
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}
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// Pass NativeArguments structure by value and call runtime.
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__ movq(Address(RSP, isolate_offset), CTX); // Set isolate in NativeArgs.
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__ movq(Address(RSP, argc_offset), R10); // Set argc in NativeArguments.
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__ leaq(RAX, Address(RBP, R10, TIMES_8, 1 * kWordSize)); // Compute argv.
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__ movq(Address(RSP, argv_offset), RAX); // Set argv in NativeArguments.
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__ addq(RAX, Immediate(1 * kWordSize)); // Retval is next to 1st argument.
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__ movq(Address(RSP, retval_offset), RAX); // Set retval in NativeArguments.
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__ call(RBX);
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// Reset exit frame information in Isolate structure.
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__ movq(Address(CTX, Isolate::top_exit_frame_info_offset()), Immediate(0));
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// Load Context pointer from Isolate structure into RBX.
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__ movq(RBX, Address(CTX, Isolate::top_context_offset()));
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// Reset Context pointer in Isolate structure.
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const Immediate raw_null =
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Immediate(reinterpret_cast<intptr_t>(Object::null()));
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__ movq(Address(CTX, Isolate::top_context_offset()), raw_null);
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// Cache Context pointer into CTX while executing Dart code.
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__ movq(CTX, RBX);
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__ LeaveFrame();
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__ ret();
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}
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// Input parameters:
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// RSP : points to return address.
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// RSP + 8 : address of last argument in argument array.
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// RSP + 8*R10 : address of first argument in argument array.
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// RSP + 8*R10 + 8 : address of return value.
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// RBX : address of the runtime function to call.
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// R10 : number of arguments to the call.
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// Must preserve callee saved registers R12 and R13.
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void StubCode::GenerateDartCallToRuntimeStub(Assembler* assembler) {
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GenerateCallRuntimeStub(assembler);
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}
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// Input parameters:
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// RSP : points to return address.
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// RSP + 8 : address of last argument in argument array.
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// RSP + 8*R10 : address of first argument in argument array.
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// RSP + 8*R10 + 8 : address of return value.
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// RBX : address of the runtime function to call.
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// R10 : number of arguments to the call.
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// Must preserve callee saved registers R12 and R13.
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void StubCode::GenerateStubCallToRuntimeStub(Assembler* assembler) {
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GenerateCallRuntimeStub(assembler);
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}
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// Print the stop message.
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static void PrintStopMessage(const char* message) {
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OS::Print("Stop message: %s\n", message);
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}
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// Input parameters:
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// RSP : points to return address.
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// RDI : stop message (const char*).
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// Must preserve all registers, except RDI and TMP.
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void StubCode::GeneratePrintStopMessageStub(Assembler* assembler) {
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// Preserve caller-saved registers.
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__ pushq(RAX);
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__ pushq(RCX);
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__ pushq(RDX);
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__ pushq(RSI);
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__ pushq(R8);
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__ pushq(R9);
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__ pushq(R10);
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__ EnterFrame(0);
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// Align frame before entering C++ world.
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if (OS::ActivationFrameAlignment() > 0) {
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__ andq(RSP, Immediate(~(OS::ActivationFrameAlignment() - 1)));
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}
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// Stop message is already in RDI.
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__ movq(TMP, Immediate(reinterpret_cast<uword>(&PrintStopMessage)));
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__ call(TMP);
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__ LeaveFrame();
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// Restore caller-saved registers.
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__ popq(R10);
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__ popq(R9);
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__ popq(R8);
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__ popq(RSI);
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__ popq(RDX);
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__ popq(RCX);
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__ popq(RAX);
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__ ret();
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}
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// Input parameters:
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// RSP : points to return address.
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// RSP + 8 : address of return value.
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// RAX : address of first argument in argument array.
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// RAX - 8*R10 + 8 : address of last argument in argument array.
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// RBX : address of the native function to call.
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// R10 : number of arguments to the call.
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void StubCode::GenerateCallNativeCFunctionStub(Assembler* assembler) {
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const intptr_t native_args_struct_offset = 0;
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const intptr_t isolate_offset =
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NativeArguments::isolate_offset() + native_args_struct_offset;
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const intptr_t argc_offset =
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NativeArguments::argc_offset() + native_args_struct_offset;
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const intptr_t argv_offset =
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NativeArguments::argv_offset() + native_args_struct_offset;
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const intptr_t retval_offset =
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NativeArguments::retval_offset() + native_args_struct_offset;
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__ EnterFrame(0);
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// Load current Isolate pointer from Context structure into R8.
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__ movq(R8, FieldAddress(CTX, Context::isolate_offset()));
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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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__ movq(Address(R8, Isolate::top_exit_frame_info_offset()), RSP);
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// Save current Context pointer into Isolate structure.
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__ movq(Address(R8, Isolate::top_context_offset()), CTX);
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// Cache Isolate pointer into CTX while executing native code.
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__ movq(CTX, R8);
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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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// RDI) and align frame before entering the C++ world.
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__ AddImmediate(RSP, Immediate(-sizeof(NativeArguments)));
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if (OS::ActivationFrameAlignment() > 0) {
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__ andq(RSP, Immediate(~(OS::ActivationFrameAlignment() - 1)));
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}
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// Pass NativeArguments structure by value and call native function.
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__ movq(Address(RSP, isolate_offset), CTX); // Set isolate in NativeArgs.
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__ movq(Address(RSP, argc_offset), R10); // Set argc in NativeArguments.
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__ movq(Address(RSP, argv_offset), RAX); // Set argv in NativeArguments.
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__ leaq(RAX, Address(RBP, 2 * kWordSize)); // Compute return value addr.
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__ movq(Address(RSP, retval_offset), RAX); // Set retval in NativeArguments.
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__ movq(RDI, RSP); // Pass the pointer to the NativeArguments.
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__ call(RBX);
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// Reset exit frame information in Isolate structure.
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__ movq(Address(CTX, Isolate::top_exit_frame_info_offset()), Immediate(0));
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// Load Context pointer from Isolate structure into R8.
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__ movq(R8, Address(CTX, Isolate::top_context_offset()));
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// Reset Context pointer in Isolate structure.
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const Immediate raw_null =
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Immediate(reinterpret_cast<intptr_t>(Object::null()));
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__ movq(Address(CTX, Isolate::top_context_offset()), raw_null);
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// Cache Context pointer into CTX while executing Dart code.
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__ movq(CTX, R8);
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__ LeaveFrame();
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__ ret();
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}
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// Input parameters:
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// RBX: function object.
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// R10: arguments descriptor array (num_args is first Smi element).
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void StubCode::GenerateCallStaticFunctionStub(Assembler* assembler) {
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const Immediate raw_null =
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Immediate(reinterpret_cast<intptr_t>(Object::null()));
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__ movq(RAX, FieldAddress(RBX, Function::code_offset()));
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__ cmpq(RAX, raw_null);
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Label function_compiled;
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__ j(NOT_EQUAL, &function_compiled, Assembler::kNearJump);
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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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__ EnterFrame(0);
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__ pushq(R10); // Preserve arguments descriptor array.
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__ pushq(RBX);
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__ CallRuntimeFromStub(kCompileFunctionRuntimeEntry);
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__ popq(RBX); // Restore read-only function object argument in RBX.
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__ popq(R10); // Restore arguments descriptor array.
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// Restore RAX.
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__ movq(RAX, FieldAddress(RBX, Function::code_offset()));
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// Remove the stub frame as we are about to jump to the dart function.
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__ LeaveFrame();
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__ Bind(&function_compiled);
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// Patch caller.
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__ EnterFrame(0);
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__ pushq(R10); // Preserve arguments descriptor array.
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__ pushq(RBX); // Preserve function object.
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__ CallRuntimeFromStub(kPatchStaticCallRuntimeEntry);
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__ popq(RBX); // Restore function object argument in RBX.
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__ popq(R10); // Restore arguments descriptor array.
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// Remove the stub frame as we are about to jump to the dart function.
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__ LeaveFrame();
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__ movq(RAX, FieldAddress(RBX, Function::code_offset()));
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__ movq(RBX, FieldAddress(RAX, Code::instructions_offset()));
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__ addq(RBX, Immediate(Instructions::HeaderSize() - kHeapObjectTag));
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__ jmp(RBX);
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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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// RBX: function object.
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// R10: arguments descriptor array (num_args is first Smi element).
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void StubCode::GenerateFixCallersTargetStub(Assembler* assembler) {
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__ Untested("FixCallersTarget stub");
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__ EnterFrame(0);
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__ pushq(R10); // Preserve arguments descriptor array.
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__ pushq(RBX); // Preserve target function.
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__ pushq(RBX); // Target function.
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__ CallRuntimeFromStub(kFixCallersTargetRuntimeEntry);
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__ popq(RAX); // discard argument.
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__ popq(RAX); // Restore function.
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__ popq(R10); // Restore arguments descriptor array.
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__ movq(RAX, FieldAddress(RAX, Function::code_offset()));
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__ movq(RAX, FieldAddress(RAX, Code::instructions_offset()));
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__ addq(RAX, Immediate(Instructions::HeaderSize() - kHeapObjectTag));
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__ LeaveFrame();
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__ jmp(RAX);
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__ int3();
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}
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// Lookup for [function-name, arg count] in 'functions_map_'.
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// Input parameters (to be treated as read only, unless calling to target!):
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// RBX: ic-data.
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// R10: arguments descriptor array (num_args is first Smi element).
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// Stack: return address, arguments.
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// If the lookup succeeds we jump to the target method from here, otherwise
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// we continue in code generated by the caller of 'MegamorphicLookup'.
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static void MegamorphicLookup(Assembler* assembler) {
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const Immediate raw_null =
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Immediate(reinterpret_cast<intptr_t>(Object::null()));
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Label class_in_rax, smi_receiver, null_receiver, not_found;
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// Total number of args is the first Smi in args descriptor array (R10).
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__ movq(RAX, FieldAddress(R10, Array::data_offset()));
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__ movq(RAX, Address(RSP, RAX, TIMES_4, 0)); // Get receiver. RAX is a Smi.
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// TODO(srdjan): Remove the special casing below for null receiver, once
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// NullClass is implemented.
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__ cmpq(RAX, raw_null);
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// Use Object class if receiver is null.
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__ j(EQUAL, &null_receiver, Assembler::kNearJump);
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__ testq(RAX, Immediate(kSmiTagMask));
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__ j(ZERO, &smi_receiver, Assembler::kNearJump);
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__ movq(RAX, FieldAddress(RAX, Object::class_offset()));
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__ jmp(&class_in_rax, Assembler::kNearJump);
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__ Bind(&smi_receiver);
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// For Smis we need to get the class from the isolate.
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// Load current Isolate pointer from Context structure into RAX.
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__ movq(RAX, FieldAddress(CTX, Context::isolate_offset()));
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__ movq(RAX, Address(RAX, Isolate::object_store_offset()));
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__ movq(RAX, Address(RAX, ObjectStore::smi_class_offset()));
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__ jmp(&class_in_rax, Assembler::kNearJump);
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__ Bind(&null_receiver);
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__ movq(RAX, FieldAddress(CTX, Context::isolate_offset()));
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__ movq(RAX, Address(RAX, Isolate::object_store_offset()));
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__ movq(RAX, Address(RAX, ObjectStore::object_class_offset()));
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__ Bind(&class_in_rax);
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// Class is in RAX.
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Label loop, next_iteration;
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// Get functions_cache, since it is allocated lazily it maybe null.
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__ movq(RAX, FieldAddress(RAX, Class::functions_cache_offset()));
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// Iterate and search for identical name.
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__ leaq(R12, FieldAddress(RAX, Array::data_offset()));
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// R12 is pointing into content of functions_map_ array.
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__ Bind(&loop);
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__ movq(R13, Address(R12, FunctionsCache::kFunctionName * kWordSize));
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__ cmpq(R13, raw_null);
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__ j(EQUAL, ¬_found, Assembler::kNearJump);
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__ cmpq(R13, FieldAddress(RBX, ICData::target_name_offset()));
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__ j(NOT_EQUAL, &next_iteration, Assembler::kNearJump);
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// Name found, check total argument count and named argument count.
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__ movq(RAX, FieldAddress(R10, Array::data_offset()));
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// RAX is total argument count as Smi.
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__ movq(R13, Address(R12, FunctionsCache::kArgCount * kWordSize));
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__ cmpq(RAX, R13); // Compare total argument counts.
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__ j(NOT_EQUAL, &next_iteration, Assembler::kNearJump);
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__ subq(RAX, FieldAddress(R10, Array::data_offset() + kWordSize));
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// RAX is named argument count as Smi.
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__ movq(R13, Address(R12, FunctionsCache::kNamedArgCount * kWordSize));
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__ cmpq(RAX, R13); // Compare named argument counts.
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__ j(NOT_EQUAL, &next_iteration, Assembler::kNearJump);
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// Argument count matches, jump to target.
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// R10: arguments descriptor array.
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__ movq(RBX, Address(R12, FunctionsCache::kFunction * kWordSize));
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__ movq(RBX, FieldAddress(RBX, Function::code_offset()));
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__ movq(RBX, FieldAddress(RBX, Code::instructions_offset()));
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__ addq(RBX, Immediate(Instructions::HeaderSize() - kHeapObjectTag));
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__ jmp(RBX);
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__ Bind(&next_iteration);
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__ AddImmediate(R12, Immediate(FunctionsCache::kNumEntries * kWordSize));
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__ jmp(&loop, Assembler::kNearJump);
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__ Bind(¬_found);
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}
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// Input parameters:
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// R13: argument count, may be zero.
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static void PushArgumentsArray(Assembler* assembler, intptr_t arg_offset) {
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const Immediate raw_null =
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Immediate(reinterpret_cast<intptr_t>(Object::null()));
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// Allocate array to store arguments of caller.
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__ movq(R10, R13); // Arguments array length.
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__ SmiTag(R10); // Convert to Smi.
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__ movq(RBX, raw_null); // Null element type for raw Array.
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__ call(&StubCode::AllocateArrayLabel());
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__ SmiUntag(R10);
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// RAX: newly allocated array.
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// R10: length of the array (was preserved by the stub).
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__ pushq(RAX); // Array is in RAX and on top of stack.
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__ leaq(R12, Address(RSP, R10, TIMES_8, arg_offset)); // Addr of first arg.
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__ leaq(RBX, FieldAddress(RAX, Array::data_offset()));
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Label loop, loop_condition;
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__ jmp(&loop_condition, Assembler::kNearJump);
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__ Bind(&loop);
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__ movq(RAX, Address(R12, 0));
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__ movq(Address(RBX, 0), RAX);
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__ AddImmediate(RBX, Immediate(kWordSize));
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__ AddImmediate(R12, Immediate(-kWordSize));
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__ Bind(&loop_condition);
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__ decq(R10);
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__ j(POSITIVE, &loop, Assembler::kNearJump);
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}
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// Input parameters:
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// RBX: ic-data.
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// R10: arguments descriptor array (num_args is first Smi element).
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// Note: The receiver object is the first argument to the function being
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// called, the stub accesses the receiver from this location directly
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// when trying to resolve the call.
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void StubCode::GenerateMegamorphicLookupStub(Assembler* assembler) {
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const Immediate raw_null =
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Immediate(reinterpret_cast<intptr_t>(Object::null()));
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MegamorphicLookup(assembler);
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// Lookup in function_table_ failed, resolve, compile and enter function
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// into function_table_.
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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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__ EnterFrame(0);
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// Preserve values across call to resolving.
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// Stack at this point:
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// TOS + 0: Saved RBP of previous frame. <== RBP
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// TOS + 1: Dart code return address
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// TOS + 2: Last argument of caller.
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// ....
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// Total number of args is the first Smi in args descriptor array (R10).
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__ movq(RAX, FieldAddress(R10, Array::data_offset()));
|
|
__ movq(RAX, Address(RSP, RAX, TIMES_4, kWordSize)); // Get receiver.
|
|
__ pushq(R10); // Preserve arguments descriptor array.
|
|
__ pushq(RAX); // Preserve receiver.
|
|
__ pushq(RBX); // Preserve ic-data.
|
|
// First resolve the function to get the function object.
|
|
|
|
__ pushq(raw_null); // Setup space on stack for return value.
|
|
__ pushq(RAX); // Push receiver.
|
|
__ CallRuntimeFromStub(kResolveCompileInstanceFunctionRuntimeEntry);
|
|
__ popq(RAX); // Remove receiver pushed earlier.
|
|
__ popq(RBX); // Pop returned code object into RBX.
|
|
// Pop preserved values
|
|
__ popq(R10); // Restore ic-data.
|
|
__ popq(RAX); // Restore receiver.
|
|
__ popq(R13); // Restore arguments descriptor array.
|
|
|
|
__ cmpq(RBX, raw_null);
|
|
Label check_implicit_closure;
|
|
__ j(EQUAL, &check_implicit_closure, Assembler::kNearJump);
|
|
|
|
// Remove the stub frame as we are about to jump to the dart function.
|
|
__ LeaveFrame();
|
|
|
|
__ movq(R10, R13);
|
|
__ movq(RBX, FieldAddress(RBX, Code::instructions_offset()));
|
|
__ addq(RBX, Immediate(Instructions::HeaderSize() - kHeapObjectTag));
|
|
__ jmp(RBX);
|
|
|
|
__ Bind(&check_implicit_closure);
|
|
// RAX: receiver.
|
|
// R10: ic-data.
|
|
// RBX: raw_null.
|
|
// R13: arguments descriptor array.
|
|
// The target function was not found.
|
|
// First check to see if this is a getter function and we are
|
|
// trying to create a closure of an instance function.
|
|
// Push values that need to be preserved across runtime call.
|
|
__ pushq(RAX); // Preserve receiver.
|
|
__ pushq(R10); // Preserve ic-data.
|
|
__ pushq(R13); // Preserve arguments descriptor array.
|
|
|
|
__ pushq(raw_null); // Setup space on stack for return value.
|
|
__ pushq(RAX); // Push receiver.
|
|
__ pushq(R10); // Ic-data array.
|
|
__ CallRuntimeFromStub(kResolveImplicitClosureFunctionRuntimeEntry);
|
|
__ popq(RAX);
|
|
__ popq(RAX);
|
|
__ popq(RBX); // Get return value into RBX, might be Closure object.
|
|
|
|
// Pop preserved values.
|
|
__ popq(R13); // Restore arguments descriptor array.
|
|
__ popq(R10); // Restore ic-data.
|
|
__ popq(RAX); // Restore receiver.
|
|
|
|
__ cmpq(RBX, raw_null);
|
|
Label check_implicit_closure_through_getter;
|
|
__ j(EQUAL, &check_implicit_closure_through_getter, Assembler::kNearJump);
|
|
|
|
__ movq(RAX, RBX); // Return value is the closure object.
|
|
// Remove the stub frame as we are about return.
|
|
__ LeaveFrame();
|
|
__ ret();
|
|
|
|
__ Bind(&check_implicit_closure_through_getter);
|
|
// RAX: receiver.
|
|
// R10: ic-data.
|
|
// RBX: raw_null.
|
|
// R13: arguments descriptor array.
|
|
// This is not the case of an instance so invoke the getter of the
|
|
// same name and see if we get a closure back which we are then
|
|
// supposed to invoke.
|
|
// Push values that need to be preserved across runtime call.
|
|
__ pushq(RAX); // Preserve receiver.
|
|
__ pushq(R10); // Preserve ic-data.
|
|
__ pushq(R13); // Preserve arguments descriptor array.
|
|
|
|
__ pushq(raw_null); // Setup space on stack for return value.
|
|
__ pushq(RAX); // Push receiver.
|
|
__ pushq(R10); // Ic-data array.
|
|
__ CallRuntimeFromStub(kResolveImplicitClosureThroughGetterRuntimeEntry);
|
|
__ popq(R10); // Pop argument.
|
|
__ popq(RAX); // Pop argument.
|
|
__ popq(RBX); // get return value into RBX, might be Closure object.
|
|
|
|
// Pop preserved values.
|
|
__ popq(R13); // Restore arguments descriptor array.
|
|
__ popq(R10); // Restore ic-data.
|
|
__ popq(RAX); // Restore receiver.
|
|
|
|
__ cmpq(RBX, raw_null);
|
|
Label function_not_found;
|
|
__ j(EQUAL, &function_not_found);
|
|
|
|
// RBX: Closure object.
|
|
// R13: Arguments descriptor array.
|
|
__ pushq(raw_null); // Setup space on stack for result from invoking Closure.
|
|
__ pushq(RBX); // Closure object.
|
|
__ pushq(R13); // Arguments descriptor.
|
|
__ movq(R13, FieldAddress(R13, Array::data_offset()));
|
|
__ SmiUntag(R13);
|
|
__ subq(R13, Immediate(1)); // Arguments array length, minus the receiver.
|
|
PushArgumentsArray(assembler, (kWordSize * 5));
|
|
// Stack layout explaining "(kWordSize * 5)" offset.
|
|
// TOS + 0: Argument array.
|
|
// TOS + 1: Arguments descriptor array.
|
|
// TOS + 2: Closure object.
|
|
// TOS + 3: Place for result from closure function.
|
|
// TOS + 4: Saved RBP of previous frame. <== RBP
|
|
// TOS + 5: Dart code return address
|
|
// TOS + 6: Last argument of caller.
|
|
// ....
|
|
|
|
__ CallRuntimeFromStub(kInvokeImplicitClosureFunctionRuntimeEntry);
|
|
// Remove arguments.
|
|
__ popq(RAX);
|
|
__ popq(RAX);
|
|
__ popq(RAX);
|
|
__ popq(RAX); // Get result into RAX.
|
|
|
|
// Remove the stub frame as we are about to return.
|
|
__ LeaveFrame();
|
|
__ ret();
|
|
|
|
__ Bind(&function_not_found);
|
|
// The target function was not found, so invoke method
|
|
// "void noSuchMethod(function_name, args_array)".
|
|
// RAX: receiver.
|
|
// R10: ic-data.
|
|
// RBX: raw_null.
|
|
// R13: argument descriptor array.
|
|
|
|
__ pushq(raw_null); // Setup space on stack for result from noSuchMethod.
|
|
__ pushq(RAX); // Receiver.
|
|
__ pushq(R10); // IC-data array.
|
|
__ pushq(R13); // Argument descriptor array.
|
|
__ movq(R13, FieldAddress(R13, Array::data_offset()));
|
|
__ SmiUntag(R13);
|
|
__ subq(R13, Immediate(1)); // Arguments array length, minus the receiver.
|
|
// See stack layout below explaining "wordSize * 6" offset.
|
|
PushArgumentsArray(assembler, (kWordSize * 6));
|
|
|
|
// Stack:
|
|
// TOS + 0: Argument array.
|
|
// TOS + 1: Argument descriptor array.
|
|
// TOS + 2: IC-data array.
|
|
// TOS + 3: Receiver.
|
|
// TOS + 4: Place for result from noSuchMethod.
|
|
// TOS + 5: Saved RBP of previous frame. <== RBP
|
|
// TOS + 6: Dart code return address
|
|
// TOS + 7: Last argument of caller.
|
|
// ....
|
|
|
|
__ CallRuntimeFromStub(kInvokeNoSuchMethodFunctionRuntimeEntry);
|
|
// Remove arguments.
|
|
__ popq(RAX);
|
|
__ popq(RAX);
|
|
__ popq(RAX);
|
|
__ popq(RAX);
|
|
__ popq(RAX); // Get result into RAX.
|
|
|
|
// Remove the stub frame as we are about to return.
|
|
__ LeaveFrame();
|
|
__ ret();
|
|
}
|
|
|
|
|
|
void StubCode::GenerateDeoptimizeStub(Assembler* assembler) {
|
|
__ Untested("Deoptimize stub");
|
|
__ EnterFrame(0);
|
|
// RAX: deoptimization reason id.
|
|
// Stack at this point:
|
|
// TOS + 0: Saved EBP of function frame that will be deoptimized. <== EBP
|
|
// TOS + 1: Deoptimization point (return address), will be patched.
|
|
// TOS + 2: top-of-stack at deoptimization point (all arguments on stack).
|
|
__ pushq(RAX);
|
|
__ CallRuntimeFromStub(kDeoptimizeRuntimeEntry);
|
|
__ popq(RAX);
|
|
__ LeaveFrame();
|
|
__ ret();
|
|
}
|
|
|
|
|
|
// Called for inline allocation of arrays.
|
|
// Input parameters:
|
|
// R10 : Array length as Smi.
|
|
// RBX : array element type (either NULL or an instantiated type).
|
|
// NOTE: R10 cannot be clobbered here as the caller relies on it being saved.
|
|
// The newly allocated object is returned in RAX.
|
|
void StubCode::GenerateAllocateArrayStub(Assembler* assembler) {
|
|
Label slow_case;
|
|
const Immediate raw_null =
|
|
Immediate(reinterpret_cast<intptr_t>(Object::null()));
|
|
|
|
if (FLAG_inline_alloc) {
|
|
// Compute the size to be allocated, it is based on the array length
|
|
// and it computed as:
|
|
// RoundedAllocationSize((array_length * kwordSize) + sizeof(RawArray)).
|
|
// Assert that length is a Smi.
|
|
__ testq(R10, Immediate(kSmiTagSize));
|
|
if (FLAG_use_slow_path) {
|
|
__ jmp(&slow_case);
|
|
} else {
|
|
__ j(NOT_ZERO, &slow_case);
|
|
}
|
|
__ movq(R13, FieldAddress(CTX, Context::isolate_offset()));
|
|
__ movq(R13, Address(R13, Isolate::heap_offset()));
|
|
__ movq(R13, Address(R13, Heap::new_space_offset()));
|
|
|
|
// Calculate and align allocation size.
|
|
// Load new object start and calculate next object start.
|
|
// RBX: array element type.
|
|
// R10: Array length as Smi.
|
|
// R13: Points to new space object.
|
|
__ movq(RAX, Address(R13, Scavenger::top_offset()));
|
|
intptr_t fixed_size = sizeof(RawArray) + kObjectAlignment - 1;
|
|
__ leaq(R12, Address(R10, TIMES_4, fixed_size)); // R10 is Smi.
|
|
ASSERT(kSmiTagShift == 1);
|
|
__ andq(R12, Immediate(-kObjectAlignment));
|
|
__ leaq(R12, Address(RAX, R12, TIMES_1, 0));
|
|
|
|
// Check if the allocation fits into the remaining space.
|
|
// RAX: potential new object start.
|
|
// R12: potential next object start.
|
|
// RBX: array element type.
|
|
// R10: Array length as Smi.
|
|
// R13: Points to new space object.
|
|
__ cmpq(R12, Address(R13, Scavenger::end_offset()));
|
|
__ j(ABOVE_EQUAL, &slow_case);
|
|
|
|
// Successfully allocated the object(s), now update top to point to
|
|
// next object start and initialize the object.
|
|
// RAX: potential new object start.
|
|
// R12: potential next object start.
|
|
// R13: Points to new space object.
|
|
__ movq(Address(R13, Scavenger::top_offset()), R12);
|
|
__ addq(RAX, Immediate(kHeapObjectTag));
|
|
|
|
// RAX: new object start as a tagged pointer.
|
|
// R12: new object end address.
|
|
// RBX: array element type.
|
|
// R10: Array length as Smi.
|
|
|
|
// Store the type argument field.
|
|
__ StoreIntoObject(RAX,
|
|
FieldAddress(RAX, Array::type_arguments_offset()),
|
|
RBX);
|
|
|
|
// Set the length field.
|
|
__ StoreIntoObject(RAX, FieldAddress(RAX, Array::length_offset()), R10);
|
|
|
|
// Store class value for array.
|
|
__ movq(RBX, FieldAddress(CTX, Context::isolate_offset()));
|
|
__ movq(RBX, Address(RBX, Isolate::object_store_offset()));
|
|
__ movq(RBX, Address(RBX, ObjectStore::array_class_offset()));
|
|
__ StoreIntoObject(RAX, FieldAddress(RAX, Array::class_offset()), RBX);
|
|
// Calculate the size tag.
|
|
// RAX: new object start as a tagged pointer.
|
|
// R12: new object end address.
|
|
// R10: Array length as Smi.
|
|
{
|
|
Label size_tag_overflow, done;
|
|
__ leaq(RBX, Address(R10, TIMES_4, fixed_size)); // R10 is Smi.
|
|
ASSERT(kSmiTagShift == 1);
|
|
__ andq(RBX, Immediate(-kObjectAlignment));
|
|
__ cmpq(RBX, Immediate(RawObject::SizeTag::kMaxSizeTag));
|
|
__ j(ABOVE, &size_tag_overflow, Assembler::kNearJump);
|
|
__ shlq(RBX, Immediate(RawObject::kSizeTagBit - kObjectAlignmentLog2));
|
|
__ movq(FieldAddress(RAX, Array::tags_offset()), RBX);
|
|
__ jmp(&done);
|
|
|
|
__ Bind(&size_tag_overflow);
|
|
__ movq(FieldAddress(RAX, Array::tags_offset()), Immediate(0));
|
|
__ Bind(&done);
|
|
}
|
|
|
|
// Initialize all array elements to raw_null.
|
|
// RAX: new object start as a tagged pointer.
|
|
// R12: new object end address.
|
|
__ leaq(RBX, FieldAddress(RAX, Array::data_offset()));
|
|
// RBX: iterator which initially points to the start of the variable
|
|
// data area to be initialized.
|
|
Label done;
|
|
Label init_loop;
|
|
__ Bind(&init_loop);
|
|
__ cmpq(RBX, R12);
|
|
__ j(ABOVE_EQUAL, &done, Assembler::kNearJump);
|
|
__ movq(Address(RBX, 0), raw_null);
|
|
__ addq(RBX, Immediate(kWordSize));
|
|
__ jmp(&init_loop, Assembler::kNearJump);
|
|
__ Bind(&done);
|
|
|
|
// Done allocating and initializing the array.
|
|
// RAX: new object.
|
|
// R10: 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);
|
|
__ EnterFrame(0);
|
|
__ pushq(raw_null); // Setup space on stack for return value.
|
|
__ pushq(R10); // Array length as Smi.
|
|
__ pushq(RBX); // Element type.
|
|
__ CallRuntimeFromStub(kAllocateArrayRuntimeEntry);
|
|
__ popq(RAX); // Pop element type argument.
|
|
__ popq(R10); // Pop array length argument.
|
|
__ popq(RAX); // Pop return value from return slot.
|
|
__ LeaveFrame();
|
|
__ ret();
|
|
}
|
|
|
|
|
|
// Input parameters:
|
|
// R10: Arguments descriptor array (num_args is first Smi element, closure
|
|
// object is not included in num_args).
|
|
// Note: The closure object is pushed before the first argument to the function
|
|
// being called, the stub accesses the closure from this location directly
|
|
// when setting up the context and resolving the entry point.
|
|
void StubCode::GenerateCallClosureFunctionStub(Assembler* assembler) {
|
|
const Immediate raw_null =
|
|
Immediate(reinterpret_cast<intptr_t>(Object::null()));
|
|
|
|
// Total number of args is the first Smi in args descriptor array (R10).
|
|
__ movq(RAX, FieldAddress(R10, Array::data_offset())); // Load num_args.
|
|
// Load closure object in R13.
|
|
__ movq(R13, Address(RSP, RAX, TIMES_4, kWordSize)); // RAX is a Smi.
|
|
|
|
// Verify that R13 is a closure by checking its class.
|
|
Label not_closure;
|
|
__ cmpq(R13, raw_null);
|
|
// Not a closure, but null object.
|
|
__ j(EQUAL, ¬_closure, Assembler::kNearJump);
|
|
__ testq(R13, Immediate(kSmiTagMask));
|
|
__ j(ZERO, ¬_closure, Assembler::kNearJump); // Not a closure, but a smi.
|
|
// Verify that the class of the object is a closure class by checking that
|
|
// class.signature_function() is not null.
|
|
__ movq(RAX, FieldAddress(R13, Object::class_offset()));
|
|
__ movq(RAX, FieldAddress(RAX, Class::signature_function_offset()));
|
|
__ cmpq(RAX, raw_null);
|
|
// Actual class is not a closure class.
|
|
__ j(EQUAL, ¬_closure, Assembler::kNearJump);
|
|
|
|
// RAX is just the signature function. Load the actual closure function.
|
|
__ movq(RBX, FieldAddress(R13, Closure::function_offset()));
|
|
|
|
// Load closure context in CTX; note that CTX has already been preserved.
|
|
__ movq(CTX, FieldAddress(R13, Closure::context_offset()));
|
|
|
|
// Load closure function code in RAX.
|
|
__ movq(RAX, FieldAddress(RBX, Function::code_offset()));
|
|
__ cmpq(RAX, raw_null);
|
|
Label function_compiled;
|
|
__ j(NOT_EQUAL, &function_compiled, Assembler::kNearJump);
|
|
|
|
// Create a stub frame as we are pushing some objects on the stack before
|
|
// calling into the runtime.
|
|
__ EnterFrame(0);
|
|
|
|
__ pushq(R10); // Preserve arguments descriptor array.
|
|
__ pushq(RBX); // Preserve read-only function object argument.
|
|
__ CallRuntimeFromStub(kCompileFunctionRuntimeEntry);
|
|
__ popq(RBX); // Restore read-only function object argument in RBX.
|
|
__ popq(R10); // Restore arguments descriptor array.
|
|
// Restore RAX.
|
|
__ movq(RAX, FieldAddress(RBX, Function::code_offset()));
|
|
|
|
// Remove the stub frame as we are about to jump to the closure function.
|
|
__ LeaveFrame();
|
|
|
|
__ Bind(&function_compiled);
|
|
// RAX: Code.
|
|
// RBX: Function.
|
|
// R10: Arguments descriptor array (num_args is first Smi element).
|
|
|
|
__ movq(RBX, FieldAddress(RAX, Code::instructions_offset()));
|
|
__ addq(RBX, Immediate(Instructions::HeaderSize() - kHeapObjectTag));
|
|
__ jmp(RBX);
|
|
|
|
__ Bind(¬_closure);
|
|
// Call runtime to report that a closure call was attempted on a non-closure
|
|
// object, passing the non-closure object and its arguments array.
|
|
// R13: non-closure object.
|
|
// R10: arguments descriptor array (num_args is first Smi element, closure
|
|
// object is not included in num_args).
|
|
|
|
// Create a stub frame as we are pushing some objects on the stack before
|
|
// calling into the runtime.
|
|
__ EnterFrame(0);
|
|
|
|
__ pushq(raw_null); // Setup space on stack for result from error reporting.
|
|
__ pushq(R13); // Non-closure object.
|
|
// Total number of args is the first Smi in args descriptor array (R10).
|
|
__ movq(R13, FieldAddress(R10, Array::data_offset())); // Load num_args.
|
|
__ SmiUntag(R13);
|
|
// See stack layout below explaining "wordSize * 4" offset.
|
|
PushArgumentsArray(assembler, (kWordSize * 4));
|
|
|
|
// Stack:
|
|
// TOS + 0: Argument array.
|
|
// TOS + 1: Non-closure object.
|
|
// TOS + 2: Place for result from reporting the error.
|
|
// TOS + 3: Saved RBP of previous frame. <== RBP
|
|
// TOS + 4: Dart code return address
|
|
// TOS + 5: Last argument of caller.
|
|
// ....
|
|
__ CallRuntimeFromStub(kReportObjectNotClosureRuntimeEntry);
|
|
__ Stop("runtime call throws an exception");
|
|
}
|
|
|
|
|
|
// Called when invoking Dart code from C++ (VM code).
|
|
// Input parameters:
|
|
// RSP : points to return address.
|
|
// RDI : entrypoint of the Dart function to call.
|
|
// RSI : arguments descriptor array.
|
|
// RDX : pointer to the argument array.
|
|
// RCX : new context containing the current isolate pointer.
|
|
void StubCode::GenerateInvokeDartCodeStub(Assembler* assembler) {
|
|
// Save frame pointer coming in.
|
|
__ EnterFrame(0);
|
|
|
|
// Save arguments descriptor array and new context.
|
|
const intptr_t kArgumentsDescOffset = -1 * kWordSize;
|
|
__ pushq(RSI);
|
|
const intptr_t kNewContextOffset = -2 * kWordSize;
|
|
__ pushq(RCX);
|
|
|
|
// Save C++ ABI callee-saved registers.
|
|
__ pushq(RBX);
|
|
__ pushq(R12);
|
|
__ pushq(R13);
|
|
__ pushq(R14);
|
|
__ pushq(R15);
|
|
|
|
// The new Context structure contains a pointer to the current Isolate
|
|
// structure. Cache the Context pointer in the CTX register so that it is
|
|
// available in generated code and calls to Isolate::Current() need not be
|
|
// done. The assumption is that this register will never be clobbered by
|
|
// compiled or runtime stub code.
|
|
|
|
// Cache the new Context pointer into CTX while executing Dart code.
|
|
__ movq(CTX, Address(RCX, VMHandles::kOffsetOfRawPtrInHandle));
|
|
|
|
// Load Isolate pointer from Context structure into R8.
|
|
__ movq(R8, FieldAddress(CTX, Context::isolate_offset()));
|
|
|
|
// Save the top exit frame info. Use RAX as a temporary register.
|
|
__ movq(RAX, Address(R8, Isolate::top_exit_frame_info_offset()));
|
|
__ pushq(RAX);
|
|
__ movq(Address(R8, Isolate::top_exit_frame_info_offset()), Immediate(0));
|
|
|
|
// StackFrameIterator reads the top exit frame info saved in this frame.
|
|
// The constant kExitLinkOffsetInEntryFrame must be kept in sync with the
|
|
// code above: kExitLinkOffsetInEntryFrame = -8 * kWordSize.
|
|
|
|
// Save the old Context pointer. Use RAX as a temporary register.
|
|
// Note that VisitObjectPointers will find this saved Context pointer during
|
|
// GC marking, since it traverses any information between SP and
|
|
// FP - kExitLinkOffsetInEntryFrame.
|
|
__ movq(RAX, Address(R8, Isolate::top_context_offset()));
|
|
__ pushq(RAX);
|
|
|
|
// Load arguments descriptor array into R10, which is passed to Dart code.
|
|
__ movq(R10, Address(RSI, VMHandles::kOffsetOfRawPtrInHandle));
|
|
|
|
// Load number of arguments into RBX.
|
|
__ movq(RBX, FieldAddress(R10, Array::data_offset()));
|
|
__ SmiUntag(RBX);
|
|
|
|
// Set up arguments for the Dart call.
|
|
Label push_arguments;
|
|
Label done_push_arguments;
|
|
__ testq(RBX, RBX); // check if there are arguments.
|
|
__ j(ZERO, &done_push_arguments, Assembler::kNearJump);
|
|
__ movq(RAX, Immediate(0));
|
|
__ Bind(&push_arguments);
|
|
__ movq(RCX, Address(RDX, RAX, TIMES_8, 0)); // RDX is start of arguments.
|
|
__ movq(RCX, Address(RCX, VMHandles::kOffsetOfRawPtrInHandle));
|
|
__ pushq(RCX);
|
|
__ incq(RAX);
|
|
__ cmpq(RAX, RBX);
|
|
__ j(LESS, &push_arguments, Assembler::kNearJump);
|
|
__ Bind(&done_push_arguments);
|
|
|
|
// Call the Dart code entrypoint.
|
|
__ call(RDI); // R10 is the arguments descriptor array.
|
|
|
|
// Read the saved new Context pointer.
|
|
__ movq(CTX, Address(RBP, kNewContextOffset));
|
|
__ movq(CTX, Address(CTX, VMHandles::kOffsetOfRawPtrInHandle));
|
|
|
|
// Read the saved arguments descriptor array to obtain the number of passed
|
|
// arguments, which is the first element of the array, a Smi.
|
|
__ movq(RSI, Address(RBP, kArgumentsDescOffset));
|
|
__ movq(R10, Address(RSI, VMHandles::kOffsetOfRawPtrInHandle));
|
|
__ movq(RDX, FieldAddress(R10, Array::data_offset()));
|
|
// Get rid of arguments pushed on the stack.
|
|
__ leaq(RSP, Address(RSP, RDX, TIMES_4, 0)); // RDX is a Smi.
|
|
|
|
// Load Isolate pointer from Context structure into CTX. Drop Context.
|
|
__ movq(CTX, FieldAddress(CTX, Context::isolate_offset()));
|
|
|
|
// Restore the saved Context pointer into the Isolate structure.
|
|
// Uses RCX as a temporary register for this.
|
|
__ popq(RCX);
|
|
__ movq(Address(CTX, Isolate::top_context_offset()), RCX);
|
|
|
|
// Restore the saved top exit frame info back into the Isolate structure.
|
|
// Uses RDX as a temporary register for this.
|
|
__ popq(RDX);
|
|
__ movq(Address(CTX, Isolate::top_exit_frame_info_offset()), RDX);
|
|
|
|
// Restore C++ ABI callee-saved registers.
|
|
__ popq(R15);
|
|
__ popq(R14);
|
|
__ popq(R13);
|
|
__ popq(R12);
|
|
__ popq(RBX);
|
|
|
|
// Restore the frame pointer.
|
|
__ LeaveFrame();
|
|
|
|
__ ret();
|
|
}
|
|
|
|
|
|
// Called for inline allocation of contexts.
|
|
// Input:
|
|
// R10: number of context variables.
|
|
// Output:
|
|
// RAX: new allocated RawContext object.
|
|
void StubCode::GenerateAllocateContextStub(Assembler* assembler) {
|
|
const Immediate raw_null =
|
|
Immediate(reinterpret_cast<intptr_t>(Object::null()));
|
|
if (FLAG_inline_alloc) {
|
|
const Class& context_class = Class::ZoneHandle(Object::context_class());
|
|
Label slow_case;
|
|
Heap* heap = Isolate::Current()->heap();
|
|
// First compute the rounded instance size.
|
|
// R10: number of context variables.
|
|
intptr_t fixed_size = (sizeof(RawContext) + kObjectAlignment - 1);
|
|
__ leaq(R13, Address(R10, TIMES_8, fixed_size));
|
|
__ andq(R13, Immediate(-kObjectAlignment));
|
|
|
|
// Now allocate the object.
|
|
// R10: number of context variables.
|
|
__ movq(RAX, Immediate(heap->TopAddress()));
|
|
__ movq(RAX, Address(RAX, 0));
|
|
__ addq(R13, RAX);
|
|
// Check if the allocation fits into the remaining space.
|
|
// RAX: potential new object.
|
|
// R13: potential next object start.
|
|
// R10: number of context variables.
|
|
__ movq(RDI, Immediate(heap->EndAddress()));
|
|
__ cmpq(R13, Address(RDI, 0));
|
|
if (FLAG_use_slow_path) {
|
|
__ jmp(&slow_case);
|
|
} else {
|
|
__ j(ABOVE_EQUAL, &slow_case);
|
|
}
|
|
|
|
// Successfully allocated the object, now update top to point to
|
|
// next object start and initialize the object.
|
|
// RAX: new object.
|
|
// R13: next object start.
|
|
// R10: number of context variables.
|
|
__ movq(RDI, Immediate(heap->TopAddress()));
|
|
__ movq(Address(RDI, 0), R13);
|
|
__ addq(RAX, Immediate(kHeapObjectTag));
|
|
|
|
// Initialize the class field in the context object.
|
|
// RAX: new object.
|
|
// R10: number of context variables.
|
|
__ LoadObject(R13, context_class); // Load up class field of context.
|
|
__ StoreIntoObject(RAX,
|
|
FieldAddress(RAX, Context::class_offset()),
|
|
R13);
|
|
// Calculate the size tag.
|
|
// RAX: new object.
|
|
// R10: number of context variables.
|
|
{
|
|
Label size_tag_overflow, done;
|
|
__ leaq(R13, Address(R10, TIMES_8, fixed_size));
|
|
__ andq(R13, Immediate(-kObjectAlignment));
|
|
__ cmpq(R13, Immediate(RawObject::SizeTag::kMaxSizeTag));
|
|
__ j(ABOVE, &size_tag_overflow, Assembler::kNearJump);
|
|
__ shlq(R13, Immediate(RawObject::kSizeTagBit - kObjectAlignmentLog2));
|
|
__ movq(FieldAddress(RAX, Context::tags_offset()), R13); // Tags.
|
|
__ jmp(&done);
|
|
|
|
__ Bind(&size_tag_overflow);
|
|
// Set overflow size tag value.
|
|
__ movq(FieldAddress(RAX, Context::tags_offset()), Immediate(0));
|
|
__ Bind(&done);
|
|
}
|
|
|
|
// Setup up number of context variables field.
|
|
// RAX: new object.
|
|
// R10: number of context variables as integer value (not object).
|
|
__ movq(FieldAddress(RAX, Context::num_variables_offset()), R10);
|
|
|
|
// Setup isolate field.
|
|
// Load Isolate pointer from Context structure into R13.
|
|
// RAX: new object.
|
|
// R10: number of context variables.
|
|
__ movq(R13, FieldAddress(CTX, Context::isolate_offset()));
|
|
// R13: Isolate, not an object.
|
|
__ movq(FieldAddress(RAX, Context::isolate_offset()), R13);
|
|
|
|
const Immediate raw_null =
|
|
Immediate(reinterpret_cast<intptr_t>(Object::null()));
|
|
// Setup the parent field.
|
|
// RAX: new object.
|
|
// R10: number of context variables.
|
|
__ movq(FieldAddress(RAX, Context::parent_offset()), raw_null);
|
|
|
|
// Initialize the context variables.
|
|
// RAX: new object.
|
|
// R10: number of context variables.
|
|
{
|
|
Label loop, entry;
|
|
__ leaq(R13, FieldAddress(RAX, Context::variable_offset(0)));
|
|
|
|
__ jmp(&entry, Assembler::kNearJump);
|
|
__ Bind(&loop);
|
|
__ decq(R10);
|
|
__ movq(Address(R13, R10, TIMES_8, 0), raw_null);
|
|
__ Bind(&entry);
|
|
__ cmpq(R10, Immediate(0));
|
|
__ j(NOT_EQUAL, &loop, Assembler::kNearJump);
|
|
}
|
|
|
|
// Done allocating and initializing the context.
|
|
// RAX: new object.
|
|
__ ret();
|
|
|
|
__ Bind(&slow_case);
|
|
}
|
|
// Create a stub frame.
|
|
__ EnterFrame(0);
|
|
__ pushq(raw_null); // Setup space on stack for the return value.
|
|
__ SmiTag(R10);
|
|
__ pushq(R10); // Push number of context variables.
|
|
__ CallRuntimeFromStub(kAllocateContextRuntimeEntry); // Allocate context.
|
|
__ popq(RAX); // Pop number of context variables argument.
|
|
__ popq(RAX); // Pop the new context object.
|
|
// RAX: new object
|
|
// Restore the frame pointer.
|
|
__ LeaveFrame();
|
|
__ ret();
|
|
}
|
|
|
|
|
|
// Called for inline allocation of objects.
|
|
// Input parameters:
|
|
// RSP + 16 : type arguments object (only if class is parameterized).
|
|
// RSP + 8 : type arguments of instantiator (only if class is parameterized).
|
|
// RSP : points to return address.
|
|
void StubCode::GenerateAllocationStubForClass(Assembler* assembler,
|
|
const Class& cls) {
|
|
const intptr_t kObjectTypeArgumentsOffset = 2 * kWordSize;
|
|
const intptr_t kInstantiatorTypeArgumentsOffset = 1 * kWordSize;
|
|
const Immediate raw_null =
|
|
Immediate(reinterpret_cast<intptr_t>(Object::null()));
|
|
// The generated code is different if the class is parameterized.
|
|
const bool is_cls_parameterized =
|
|
cls.type_arguments_instance_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; // In words.
|
|
const intptr_t instance_size = cls.instance_size();
|
|
ASSERT(instance_size > 0);
|
|
const intptr_t type_args_size = InstantiatedTypeArguments::InstanceSize();
|
|
if (FLAG_inline_alloc &&
|
|
PageSpace::IsPageAllocatableSize(instance_size + type_args_size)) {
|
|
Label slow_case;
|
|
Heap* heap = Isolate::Current()->heap();
|
|
__ movq(RAX, Immediate(heap->TopAddress()));
|
|
__ movq(RAX, Address(RAX, 0));
|
|
__ leaq(RBX, Address(RAX, instance_size));
|
|
if (is_cls_parameterized) {
|
|
__ movq(RCX, RBX);
|
|
// A new InstantiatedTypeArguments object only needs to be allocated if
|
|
// the instantiator is provided (not kNoInstantiator, but may be null).
|
|
Label no_instantiator;
|
|
__ cmpq(Address(RSP, kInstantiatorTypeArgumentsOffset),
|
|
Immediate(Smi::RawValue(StubCode::kNoInstantiator)));
|
|
__ j(EQUAL, &no_instantiator, Assembler::kNearJump);
|
|
__ addq(RBX, Immediate(type_args_size));
|
|
__ Bind(&no_instantiator);
|
|
// RCX: potential new object end and, if RCX != RBX, potential new
|
|
// InstantiatedTypeArguments object start.
|
|
}
|
|
// Check if the allocation fits into the remaining space.
|
|
// RAX: potential new object start.
|
|
// RBX: potential next object start.
|
|
__ movq(RDI, Immediate(heap->EndAddress()));
|
|
__ cmpq(RBX, Address(RDI, 0));
|
|
if (FLAG_use_slow_path) {
|
|
__ jmp(&slow_case);
|
|
} else {
|
|
__ j(ABOVE_EQUAL, &slow_case);
|
|
}
|
|
|
|
// Successfully allocated the object(s), now update top to point to
|
|
// next object start and initialize the object.
|
|
__ movq(RDI, Immediate(heap->TopAddress()));
|
|
__ movq(Address(RDI, 0), RBX);
|
|
|
|
if (is_cls_parameterized) {
|
|
// Initialize the type arguments field in the object.
|
|
// RAX: new object start.
|
|
// RCX: potential new object end and, if RCX != RBX, potential new
|
|
// InstantiatedTypeArguments object start.
|
|
// RBX: next object start.
|
|
Label type_arguments_ready;
|
|
__ movq(RDI, Address(RSP, kObjectTypeArgumentsOffset));
|
|
__ cmpq(RCX, RBX);
|
|
__ j(EQUAL, &type_arguments_ready, Assembler::kNearJump);
|
|
// Initialize InstantiatedTypeArguments object at RCX.
|
|
__ movq(Address(RCX,
|
|
InstantiatedTypeArguments::uninstantiated_type_arguments_offset()),
|
|
RDI);
|
|
__ movq(RDX, Address(RSP, kInstantiatorTypeArgumentsOffset));
|
|
__ movq(Address(RCX,
|
|
InstantiatedTypeArguments::instantiator_type_arguments_offset()),
|
|
RDX);
|
|
__ LoadObject(RDX,
|
|
Class::ZoneHandle(Object::instantiated_type_arguments_class()));
|
|
__ movq(Address(RCX, Instance::class_offset()), RDX); // Set its class.
|
|
// Set the tags.
|
|
__ movq(Address(RCX, Instance::tags_offset()),
|
|
Immediate(RawObject::SizeTag::encode(type_args_size)));
|
|
// Set the new InstantiatedTypeArguments object (RCX) as the type
|
|
// arguments (RDI) of the new object (RAX).
|
|
__ movq(RDI, RCX);
|
|
__ addq(RDI, Immediate(kHeapObjectTag));
|
|
// Set RBX to new object end.
|
|
__ movq(RBX, RCX);
|
|
__ Bind(&type_arguments_ready);
|
|
// RAX: new object.
|
|
// RDI: new object type arguments.
|
|
}
|
|
|
|
// Initialize the class field in the object.
|
|
// RAX: new object start.
|
|
// RBX: next object start.
|
|
// RDI: new object type arguments (if is_cls_parameterized).
|
|
__ LoadObject(RDX, cls); // Load class of object to be allocated.
|
|
__ movq(Address(RAX, Instance::class_offset()), RDX);
|
|
// Set the tags.
|
|
__ movq(Address(RAX, Instance::tags_offset()),
|
|
Immediate(RawObject::SizeTag::encode(instance_size)));
|
|
|
|
// Initialize the remaining words of the object.
|
|
const Immediate raw_null =
|
|
Immediate(reinterpret_cast<intptr_t>(Object::null()));
|
|
|
|
// RAX: new object start.
|
|
// RBX: next object start.
|
|
// RDX: class of the object to be allocated.
|
|
// First try inlining the initialization without a loop.
|
|
if (instance_size < (kInlineInstanceSize * kWordSize) &&
|
|
cls.num_native_fields() == 0) {
|
|
// Check if the object contains any non-header fields.
|
|
// Small objects are initialized using a consecutive set of writes.
|
|
for (intptr_t current_offset = sizeof(RawObject);
|
|
current_offset < instance_size;
|
|
current_offset += kWordSize) {
|
|
__ movq(Address(RAX, current_offset), raw_null);
|
|
}
|
|
} else {
|
|
__ leaq(RCX, Address(RAX, sizeof(RawObject)));
|
|
// Loop until the whole object is initialized.
|
|
Label init_loop;
|
|
if (cls.num_native_fields() > 0) {
|
|
// Initialize native fields.
|
|
// RAX: new object.
|
|
// RBX: next object start.
|
|
// RDX: class of the object to be allocated.
|
|
// RCX: next word to be initialized.
|
|
intptr_t offset = Class::num_native_fields_offset() - kHeapObjectTag;
|
|
__ movq(RDX, Address(RDX, offset));
|
|
__ leaq(RDX, Address(RAX, RDX, TIMES_8, sizeof(RawObject)));
|
|
|
|
// RDX: start of dart fields.
|
|
// RCX: next word to be initialized.
|
|
Label init_native_loop;
|
|
__ Bind(&init_native_loop);
|
|
__ cmpq(RCX, RDX);
|
|
__ j(ABOVE_EQUAL, &init_loop, Assembler::kNearJump);
|
|
__ movq(Address(RCX, 0), Immediate(0));
|
|
__ addq(RCX, Immediate(kWordSize));
|
|
__ jmp(&init_native_loop, Assembler::kNearJump);
|
|
}
|
|
// Now initialize the dart fields.
|
|
// RAX: new object.
|
|
// RBX: next object start.
|
|
// RCX: next word to be initialized.
|
|
Label done;
|
|
__ Bind(&init_loop);
|
|
__ cmpq(RCX, RBX);
|
|
__ j(ABOVE_EQUAL, &done, Assembler::kNearJump);
|
|
__ movq(Address(RCX, 0), raw_null);
|
|
__ addq(RCX, Immediate(kWordSize));
|
|
__ jmp(&init_loop, Assembler::kNearJump);
|
|
__ Bind(&done);
|
|
}
|
|
if (is_cls_parameterized) {
|
|
// RDI: new object type arguments.
|
|
// Set the type arguments in the new object.
|
|
__ movq(Address(RAX, cls.type_arguments_instance_field_offset()), RDI);
|
|
}
|
|
// Done allocating and initializing the instance.
|
|
// RAX: new object.
|
|
__ addq(RAX, Immediate(kHeapObjectTag));
|
|
__ ret();
|
|
|
|
__ Bind(&slow_case);
|
|
}
|
|
if (is_cls_parameterized) {
|
|
__ movq(RAX, Address(RSP, kObjectTypeArgumentsOffset));
|
|
__ movq(RDX, Address(RSP, kInstantiatorTypeArgumentsOffset));
|
|
}
|
|
// Create a stub frame.
|
|
__ EnterFrame(0);
|
|
__ pushq(raw_null); // Setup space on stack for return value.
|
|
__ PushObject(cls); // Push class of object to be allocated.
|
|
if (is_cls_parameterized) {
|
|
__ pushq(RAX); // Push type arguments of object to be allocated.
|
|
__ pushq(RDX); // Push type arguments of instantiator.
|
|
} else {
|
|
__ pushq(raw_null); // Push null type arguments.
|
|
__ pushq(Immediate(Smi::RawValue(StubCode::kNoInstantiator)));
|
|
}
|
|
__ CallRuntimeFromStub(kAllocateObjectRuntimeEntry); // Allocate object.
|
|
__ popq(RAX); // Pop argument (instantiator).
|
|
__ popq(RAX); // Pop argument (type arguments of object).
|
|
__ popq(RAX); // Pop argument (class of object).
|
|
__ popq(RAX); // Pop result (newly allocated object).
|
|
// RAX: new object
|
|
// Restore the frame pointer.
|
|
__ LeaveFrame();
|
|
__ ret();
|
|
}
|
|
|
|
|
|
// Called for inline allocation of closures.
|
|
// Input parameters:
|
|
// If the signature class is not parameterized, the receiver, if any, will be
|
|
// at RSP + 8 instead of RSP + 16, since no type arguments are passed.
|
|
// RSP + 16 (or RSP + 8): receiver (only if implicit instance closure).
|
|
// RSP + 8 : type arguments object (only if signature class is parameterized).
|
|
// RSP : points to return address.
|
|
void StubCode::GenerateAllocationStubForClosure(Assembler* assembler,
|
|
const Function& func) {
|
|
const Immediate raw_null =
|
|
Immediate(reinterpret_cast<intptr_t>(Object::null()));
|
|
ASSERT(func.IsClosureFunction());
|
|
const bool is_implicit_static_closure =
|
|
func.IsImplicitStaticClosureFunction();
|
|
const bool is_implicit_instance_closure =
|
|
func.IsImplicitInstanceClosureFunction();
|
|
const Class& cls = Class::ZoneHandle(func.signature_class());
|
|
const bool has_type_arguments = cls.HasTypeArguments();
|
|
const intptr_t kTypeArgumentsOffset = 1 * kWordSize;
|
|
const intptr_t kReceiverOffset = (has_type_arguments ? 2 : 1) * kWordSize;
|
|
const intptr_t closure_size = Closure::InstanceSize();
|
|
const intptr_t context_size = Context::InstanceSize(1); // Captured receiver.
|
|
if (FLAG_inline_alloc &&
|
|
PageSpace::IsPageAllocatableSize(closure_size + context_size)) {
|
|
Label slow_case;
|
|
Heap* heap = Isolate::Current()->heap();
|
|
__ movq(RAX, Immediate(heap->TopAddress()));
|
|
__ movq(RAX, Address(RAX, 0));
|
|
__ leaq(R13, Address(RAX, closure_size));
|
|
if (is_implicit_instance_closure) {
|
|
__ movq(RBX, R13); // RBX: new context address.
|
|
__ addq(R13, Immediate(context_size));
|
|
}
|
|
// Check if the allocation fits into the remaining space.
|
|
// RAX: potential new closure object.
|
|
// RBX: potential new context object (only if is_implicit_closure).
|
|
// R13: potential next object start.
|
|
__ movq(RDI, Immediate(heap->EndAddress()));
|
|
__ cmpq(R13, Address(RDI, 0));
|
|
if (FLAG_use_slow_path) {
|
|
__ jmp(&slow_case);
|
|
} else {
|
|
__ j(ABOVE_EQUAL, &slow_case);
|
|
}
|
|
|
|
// Successfully allocated the object, now update top to point to
|
|
// next object start and initialize the object.
|
|
__ movq(RDI, Immediate(heap->TopAddress()));
|
|
__ movq(Address(RDI, 0), R13);
|
|
|
|
// Initialize the class field in the object.
|
|
// RAX: new closure object.
|
|
// RBX: new context object (only if is_implicit_closure).
|
|
__ LoadObject(R10, cls); // Load signature class of closure.
|
|
__ movq(Address(RAX, Closure::class_offset()), R10);
|
|
// Set the tags.
|
|
__ movq(Address(RAX, Closure::tags_offset()),
|
|
Immediate(RawObject::SizeTag::encode(closure_size)));
|
|
|
|
// Initialize the function field in the object.
|
|
// RAX: new closure object.
|
|
// RBX: new context object (only if is_implicit_closure).
|
|
// R13: next object start.
|
|
__ LoadObject(R10, func); // Load function of closure to be allocated.
|
|
__ movq(Address(RAX, Closure::function_offset()), R10);
|
|
|
|
// Setup the context for this closure.
|
|
if (is_implicit_static_closure) {
|
|
ObjectStore* object_store = Isolate::Current()->object_store();
|
|
ASSERT(object_store != NULL);
|
|
const Context& empty_context =
|
|
Context::ZoneHandle(object_store->empty_context());
|
|
__ LoadObject(R10, empty_context);
|
|
__ movq(Address(RAX, Closure::context_offset()), R10);
|
|
} else if (is_implicit_instance_closure) {
|
|
// Initialize the new context capturing the receiver.
|
|
|
|
// Set the class field to the Context class.
|
|
__ LoadObject(R13, Class::ZoneHandle(Object::context_class()));
|
|
__ movq(Address(RBX, Context::class_offset()), R13);
|
|
// Set the tags.
|
|
__ movq(Address(RBX, Context::tags_offset()),
|
|
Immediate(RawObject::SizeTag::encode(context_size)));
|
|
|
|
// Set number of variables field to 1 (for captured receiver).
|
|
__ movq(Address(RBX, Context::num_variables_offset()), Immediate(1));
|
|
|
|
// Set isolate field to isolate of current context.
|
|
__ movq(R10, FieldAddress(CTX, Context::isolate_offset()));
|
|
__ movq(Address(RBX, Context::isolate_offset()), R10);
|
|
|
|
// Set the parent field to null.
|
|
__ movq(Address(RBX, Context::parent_offset()), raw_null);
|
|
|
|
// Initialize the context variable to the receiver.
|
|
__ movq(R10, Address(RSP, kReceiverOffset));
|
|
__ movq(Address(RBX, Context::variable_offset(0)), R10);
|
|
|
|
// Set the newly allocated context in the newly allocated closure.
|
|
__ addq(RBX, Immediate(kHeapObjectTag));
|
|
__ movq(Address(RAX, Closure::context_offset()), RBX);
|
|
} else {
|
|
__ movq(Address(RAX, Closure::context_offset()), CTX);
|
|
}
|
|
|
|
// Set the type arguments field in the newly allocated closure.
|
|
if (has_type_arguments) {
|
|
ASSERT(!is_implicit_static_closure);
|
|
// Use the passed-in type arguments.
|
|
__ movq(R10, Address(RSP, kTypeArgumentsOffset));
|
|
__ movq(Address(RAX, Closure::type_arguments_offset()), R10);
|
|
} else {
|
|
// Set to null.
|
|
__ movq(Address(RAX, Closure::type_arguments_offset()), raw_null);
|
|
}
|
|
|
|
__ movq(Address(RAX, Closure::smrck_offset()), raw_null);
|
|
|
|
// Done allocating and initializing the instance.
|
|
// RAX: new object.
|
|
__ addq(RAX, Immediate(kHeapObjectTag));
|
|
__ ret();
|
|
|
|
__ Bind(&slow_case);
|
|
}
|
|
if (has_type_arguments) {
|
|
__ movq(RCX, Address(RSP, kTypeArgumentsOffset));
|
|
}
|
|
if (is_implicit_instance_closure) {
|
|
__ movq(RAX, Address(RSP, kReceiverOffset));
|
|
}
|
|
// Create the stub frame.
|
|
__ EnterFrame(0);
|
|
__ pushq(raw_null); // Setup space on stack for the return value.
|
|
__ PushObject(func);
|
|
if (is_implicit_static_closure) {
|
|
__ CallRuntimeFromStub(kAllocateImplicitStaticClosureRuntimeEntry);
|
|
} else {
|
|
if (is_implicit_instance_closure) {
|
|
__ pushq(RAX); // Receiver.
|
|
}
|
|
if (has_type_arguments) {
|
|
__ pushq(RCX); // Push type arguments of closure to be allocated.
|
|
} else {
|
|
__ pushq(raw_null); // Push null type arguments.
|
|
}
|
|
if (is_implicit_instance_closure) {
|
|
__ CallRuntimeFromStub(kAllocateImplicitInstanceClosureRuntimeEntry);
|
|
__ popq(RAX); // Pop type arguments.
|
|
__ popq(RAX); // Pop receiver.
|
|
} else {
|
|
ASSERT(func.IsNonImplicitClosureFunction());
|
|
__ CallRuntimeFromStub(kAllocateClosureRuntimeEntry);
|
|
__ popq(RAX); // Pop type arguments.
|
|
}
|
|
}
|
|
__ popq(RAX); // Pop the function object.
|
|
__ popq(RAX); // Pop the result.
|
|
// RAX: New closure object.
|
|
// Restore the calling frame.
|
|
__ LeaveFrame();
|
|
__ ret();
|
|
}
|
|
|
|
|
|
// Called for invoking noSuchMethod function from the entry code of a dart
|
|
// function after an error in passed named arguments is detected.
|
|
// Input parameters:
|
|
// RBP : points to previous frame pointer.
|
|
// RBP + 8 : points to return address.
|
|
// RBP + 16 : address of last argument (arg n-1).
|
|
// RBP + 16 + 8*(n-1) : address of first argument (arg 0).
|
|
// RBX : ic-data.
|
|
// R10 : arguments descriptor array.
|
|
void StubCode::GenerateCallNoSuchMethodFunctionStub(Assembler* assembler) {
|
|
// The target function was not found, so invoke method
|
|
// "void noSuchMethod(function_name, Array arguments)".
|
|
// TODO(regis): For now, we simply pass the actual arguments, both positional
|
|
// and named, as the argument array. This is not correct if out-of-order
|
|
// named arguments were passed.
|
|
// The signature of the "noSuchMethod" method has to change from
|
|
// noSuchMethod(String name, Array arguments) to something like
|
|
// noSuchMethod(InvocationMirror call).
|
|
// Also, the class NoSuchMethodException has to be modified accordingly.
|
|
// Total number of args is the first Smi in args descriptor array (R10).
|
|
const Immediate raw_null =
|
|
Immediate(reinterpret_cast<intptr_t>(Object::null()));
|
|
__ movq(R13, FieldAddress(R10, Array::data_offset()));
|
|
__ SmiUntag(R13);
|
|
__ movq(RAX, Address(RBP, R13, TIMES_8, kWordSize)); // Get receiver.
|
|
|
|
__ EnterFrame(0);
|
|
__ pushq(raw_null); // Setup space on stack for result from noSuchMethod.
|
|
__ pushq(RAX); // Receiver.
|
|
__ pushq(RBX); // IC data array.
|
|
__ pushq(R10); // Arguments descriptor array.
|
|
__ subq(R13, Immediate(1)); // Arguments array length, minus the receiver.
|
|
// See stack layout below explaining "wordSize * 8" offset.
|
|
PushArgumentsArray(assembler, (kWordSize * 8));
|
|
|
|
// Stack:
|
|
// TOS + 0: Argument array.
|
|
// TOS + 1: Arguments descriptor array.
|
|
// TOS + 2: Ic-data array.
|
|
// TOS + 3: Receiver.
|
|
// TOS + 4: Place for result from noSuchMethod.
|
|
// TOS + 5: Saved RBP of previous frame. <== RBP
|
|
// TOS + 6: Dart callee (or stub) code return address
|
|
// TOS + 7: Saved RBP of dart caller frame.
|
|
// TOS + 8: Dart caller code return address
|
|
// TOS + 9: Last argument of caller.
|
|
// ....
|
|
__ CallRuntimeFromStub(kInvokeNoSuchMethodFunctionRuntimeEntry);
|
|
// Remove arguments.
|
|
__ popq(RAX);
|
|
__ popq(RAX);
|
|
__ popq(RAX);
|
|
__ popq(RAX);
|
|
__ popq(RAX); // Get result into RAX.
|
|
|
|
// Remove the stub frame as we are about to return.
|
|
__ LeaveFrame();
|
|
__ ret();
|
|
}
|
|
|
|
|
|
|
|
// Generate inline cache check for 'num_args'.
|
|
// RBX: Inline cache data object.
|
|
// R10: Arguments array.
|
|
// TOS(0): return address
|
|
// 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) {
|
|
// TODO(srdjan): Add usage counter increment and test (see ia32).
|
|
ASSERT(num_args > 0);
|
|
// Get receiver.
|
|
__ movq(RAX, FieldAddress(R10, Array::data_offset()));
|
|
__ movq(RAX, Address(RSP, RAX, TIMES_4, 0)); // RAX (argument count) is Smi.
|
|
|
|
Label get_class, ic_miss;
|
|
__ call(&get_class);
|
|
// RAX: receiver's class
|
|
// RBX: IC data array.
|
|
|
|
#if defined(DEBUG)
|
|
{ Label ok;
|
|
// Check that the IC data array has NumberOfArgumentsChecked() == num_args.
|
|
// 'num_args_tested' is stored as an untagged int.
|
|
__ movq(RCX, FieldAddress(RBX, ICData::num_args_tested_offset()));
|
|
__ cmpq(RCX, Immediate(num_args));
|
|
__ j(EQUAL, &ok, Assembler::kNearJump);
|
|
__ Stop("Incorrect stub for IC data");
|
|
__ Bind(&ok);
|
|
}
|
|
#endif // DEBUG
|
|
|
|
// Loop that checks if there is an IC data match.
|
|
// RAX: receiver's class.
|
|
// RBX: IC data object (preserved).
|
|
__ movq(R12, FieldAddress(RBX, ICData::ic_data_offset()));
|
|
// R12: ic_data_array with check entries: classes and target functions.
|
|
__ leaq(R12, FieldAddress(R12, Array::data_offset()));
|
|
// R12: points directly to the first ic data array element.
|
|
const Immediate raw_null =
|
|
Immediate(reinterpret_cast<intptr_t>(Object::null()));
|
|
Label loop, found;
|
|
if (num_args == 1) {
|
|
__ Bind(&loop);
|
|
__ movq(R13, Address(R12, 0)); // Get class to check.
|
|
__ cmpq(RAX, R13); // Match?
|
|
__ j(EQUAL, &found, Assembler::kNearJump);
|
|
__ addq(R12, Immediate(kWordSize * 2)); // Next element (class + target).
|
|
__ cmpq(R13, raw_null); // Done?
|
|
__ j(NOT_EQUAL, &loop, Assembler::kNearJump);
|
|
} else if (num_args == 2) {
|
|
Label no_match;
|
|
__ Bind(&loop);
|
|
__ movq(R13, Address(R12, 0)); // Get class from IC data to check.
|
|
// Get receiver.
|
|
__ movq(RAX, FieldAddress(R10, Array::data_offset()));
|
|
__ movq(RAX, Address(RSP, RAX, TIMES_4, 0)); // RAX is Smi.
|
|
__ call(&get_class);
|
|
__ cmpq(RAX, R13); // Match?
|
|
__ j(NOT_EQUAL, &no_match, Assembler::kNearJump);
|
|
// Check second.
|
|
__ movq(R13, Address(R12, kWordSize)); // Get class from IC data to check.
|
|
// Get next argument.
|
|
__ movq(RAX, FieldAddress(R10, Array::data_offset()));
|
|
__ movq(RAX, Address(RSP, RAX, TIMES_4, -kWordSize)); // RAX is Smi.
|
|
__ call(&get_class);
|
|
__ cmpq(RAX, R13); // Match?
|
|
__ j(EQUAL, &found);
|
|
__ Bind(&no_match);
|
|
__ addq(R12, Immediate(kWordSize * (1 + num_args))); // Next element.
|
|
__ cmpq(R13, raw_null); // Done?
|
|
__ j(NOT_EQUAL, &loop, Assembler::kNearJump);
|
|
}
|
|
|
|
__ Bind(&ic_miss);
|
|
// Get receiver, again.
|
|
__ movq(RAX, FieldAddress(R10, Array::data_offset()));
|
|
__ leaq(RAX, Address(RSP, RAX, TIMES_4, 0)); // RAX is Smi.
|
|
__ EnterFrame(0);
|
|
__ pushq(R10); // Preserve arguments array.
|
|
__ pushq(RBX); // Preserve IC data array
|
|
__ pushq(raw_null); // Setup space on stack for result (target code object).
|
|
__ movq(R10, FieldAddress(R10, Array::data_offset()));
|
|
// Push call arguments.
|
|
for (intptr_t i = 0; i < num_args; i++) {
|
|
__ movq(R10, Address(RAX, -kWordSize * i));
|
|
__ pushq(R10);
|
|
}
|
|
if (num_args == 1) {
|
|
__ CallRuntimeFromStub(kInlineCacheMissHandlerOneArgRuntimeEntry);
|
|
} else if (num_args == 2) {
|
|
__ CallRuntimeFromStub(kInlineCacheMissHandlerTwoArgsRuntimeEntry);
|
|
} else {
|
|
UNIMPLEMENTED();
|
|
}
|
|
// Remove call arguments pushed earlier.
|
|
for (intptr_t i = 0; i < num_args; i++) {
|
|
__ popq(RAX);
|
|
}
|
|
__ popq(RAX); // Pop returned code object into RAX (null if not found).
|
|
__ popq(RBX); // Restore IC data array.
|
|
__ popq(R10); // Restore arguments array.
|
|
__ LeaveFrame();
|
|
Label call_target_function;
|
|
__ cmpq(RAX, raw_null);
|
|
__ j(NOT_EQUAL, &call_target_function, Assembler::kNearJump);
|
|
// NoSuchMethod or closure.
|
|
__ jmp(&StubCode::MegamorphicLookupLabel());
|
|
|
|
__ Bind(&found);
|
|
// R12: Pointer to an IC data check group (classes + target)
|
|
__ movq(RAX, Address(R12, kWordSize * num_args)); // Target function.
|
|
|
|
__ Bind(&call_target_function);
|
|
// RAX: Target function.
|
|
__ movq(RAX, FieldAddress(RAX, Function::code_offset()));
|
|
__ movq(RAX, FieldAddress(RAX, Code::instructions_offset()));
|
|
__ addq(RAX, Immediate(Instructions::HeaderSize() - kHeapObjectTag));
|
|
__ jmp(RAX);
|
|
|
|
__ Bind(&get_class);
|
|
Label not_smi;
|
|
// Test if Smi -> load Smi class for comparison.
|
|
__ testq(RAX, Immediate(kSmiTagMask));
|
|
__ j(NOT_ZERO, ¬_smi, Assembler::kNearJump);
|
|
const Class& smi_class =
|
|
Class::ZoneHandle(Isolate::Current()->object_store()->smi_class());
|
|
__ LoadObject(RAX, smi_class);
|
|
__ ret();
|
|
|
|
__ Bind(¬_smi);
|
|
__ movq(RAX, FieldAddress(RAX, Object::class_offset()));
|
|
__ ret();
|
|
}
|
|
|
|
|
|
// Use inline cache data array to invoke the target or continue in inline
|
|
// cache miss handler. Stub for 1-argument check (receiver class).
|
|
// RCX: Inline cache data array
|
|
// RDX: Arguments array
|
|
// TOS(0): return address
|
|
// Inline cache data array 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) {
|
|
return GenerateNArgsCheckInlineCacheStub(assembler, 1);
|
|
}
|
|
|
|
|
|
void StubCode::GenerateTwoArgsCheckInlineCacheStub(Assembler* assembler) {
|
|
return GenerateNArgsCheckInlineCacheStub(assembler, 2);
|
|
}
|
|
|
|
|
|
// RBX: Function object.
|
|
// R10: Arguments array.
|
|
// TOS(0): return address (Dart code).
|
|
void StubCode::GenerateBreakpointStaticStub(Assembler* assembler) {
|
|
__ EnterFrame(0);
|
|
__ pushq(R10);
|
|
__ pushq(RBX);
|
|
__ CallRuntimeFromStub(kBreakpointStaticHandlerRuntimeEntry);
|
|
__ popq(RBX);
|
|
__ popq(R10);
|
|
__ LeaveFrame();
|
|
|
|
// Now call the static function. The breakpoint handler function
|
|
// ensures that the call target is compiled.
|
|
__ movq(RAX, FieldAddress(RBX, Function::code_offset()));
|
|
__ movq(RBX, FieldAddress(RAX, Code::instructions_offset()));
|
|
__ addq(RBX, Immediate(Instructions::HeaderSize() - kHeapObjectTag));
|
|
__ jmp(RBX);
|
|
}
|
|
|
|
|
|
// TOS(0): return address (Dart code).
|
|
void StubCode::GenerateBreakpointReturnStub(Assembler* assembler) {
|
|
__ EnterFrame(0);
|
|
__ pushq(RAX);
|
|
__ CallRuntimeFromStub(kBreakpointReturnHandlerRuntimeEntry);
|
|
__ popq(RAX);
|
|
__ LeaveFrame();
|
|
|
|
__ popq(R11); // discard return address of call to this stub.
|
|
__ LeaveFrame();
|
|
__ ret();
|
|
}
|
|
|
|
|
|
// RBX: Inline cache data array.
|
|
// R10: Arguments array.
|
|
// TOS(0): return address (Dart code).
|
|
void StubCode::GenerateBreakpointDynamicStub(Assembler* assembler) {
|
|
__ EnterFrame(0);
|
|
__ pushq(RBX);
|
|
__ pushq(R10);
|
|
__ CallRuntimeFromStub(kBreakpointDynamicHandlerRuntimeEntry);
|
|
__ popq(R10);
|
|
__ popq(RBX);
|
|
__ LeaveFrame();
|
|
|
|
// Find out which dispatch stub to call.
|
|
Label ic_cache_one_arg;
|
|
__ movq(RCX, FieldAddress(RBX, ICData::num_args_tested_offset()));
|
|
__ cmpq(RCX, Immediate(1));
|
|
__ j(EQUAL, &ic_cache_one_arg, Assembler::kNearJump);
|
|
__ jmp(&StubCode::TwoArgsCheckInlineCacheLabel());
|
|
__ Bind(&ic_cache_one_arg);
|
|
__ jmp(&StubCode::OneArgCheckInlineCacheLabel());
|
|
}
|
|
|
|
|
|
void StubCode::GenerateIsRawSubTypeStub(Assembler* assembler) {
|
|
__ Unimplemented("IsRawSubType Stub");
|
|
}
|
|
|
|
} // namespace dart
|
|
|
|
#endif // defined TARGET_ARCH_X64
|