rmacnak@google.com
5afea71262
BUG=http://dartbug.com/19331 R=asiva@google.com, iposva@google.com Review URL: https://codereview.chromium.org//335443002 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@37297 260f80e4-7a28-3924-810f-c04153c831b5
1868 lines
67 KiB
C++
1868 lines
67 KiB
C++
// Copyright (c) 2013, 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/assembler.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/resolver.h"
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#include "vm/scavenger.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(bool, enable_debugger);
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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::GenerateCallToRuntimeStub(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_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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__ 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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#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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__ movq(RAX, Immediate(VMTag::kScriptTagId));
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__ cmpq(RAX, Address(CTX, Isolate::vm_tag_offset()));
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__ j(EQUAL, &ok, Assembler::kNearJump);
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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 isolate is executing VM code.
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__ movq(Address(CTX, Isolate::vm_tag_offset()), RBX);
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// Reserve space for arguments and align frame before entering C++ world.
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__ subq(RSP, Immediate(sizeof(NativeArguments)));
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if (OS::ActivationFrameAlignment() > 1) {
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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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// 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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__ SmiUntag(R10);
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__ movq(Address(RSP, argc_tag_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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#if defined(_WIN64)
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ASSERT(sizeof(NativeArguments) > CallingConventions::kRegisterTransferLimit);
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__ movq(CallingConventions::kArg1Reg, RSP);
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#endif
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__ CallCFunction(RBX);
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// Mark that the isolate is executing Dart code.
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__ movq(Address(CTX, Isolate::vm_tag_offset()),
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Immediate(VMTag::kScriptTagId));
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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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__ LoadObject(R12, Object::null_object(), PP);
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__ movq(Address(CTX, Isolate::top_context_offset()), R12);
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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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// 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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// 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.
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void StubCode::GeneratePrintStopMessageStub(Assembler* assembler) {
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__ EnterCallRuntimeFrame(0);
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// Call the runtime leaf function. RDI already contains the parameter.
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#if defined(_WIN64)
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__ movq(CallingConventions::kArg1Reg, RDI);
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#endif
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__ CallRuntime(kPrintStopMessageRuntimeEntry, 1);
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__ LeaveCallRuntimeFrame();
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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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// RBX : address of the native function to call.
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// R10 : 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 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_tag_offset =
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NativeArguments::argc_tag_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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#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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__ movq(R8, Immediate(VMTag::kScriptTagId));
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__ cmpq(R8, Address(CTX, Isolate::vm_tag_offset()));
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__ j(EQUAL, &ok, Assembler::kNearJump);
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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 isolate is executing Native code.
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__ movq(Address(CTX, Isolate::vm_tag_offset()), RBX);
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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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__ subq(RSP, Immediate(sizeof(NativeArguments)));
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if (OS::ActivationFrameAlignment() > 1) {
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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_tag_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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// Pass the pointer to the NativeArguments.
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__ movq(CallingConventions::kArg1Reg, RSP);
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// Pass pointer to function entrypoint.
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__ movq(CallingConventions::kArg2Reg, RBX);
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__ CallCFunction(&NativeEntry::NativeCallWrapperLabel());
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// Mark that the isolate is executing Dart code.
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__ movq(Address(CTX, Isolate::vm_tag_offset()),
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Immediate(VMTag::kScriptTagId));
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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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__ LoadObject(R12, Object::null_object(), PP);
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__ movq(Address(CTX, Isolate::top_context_offset()), R12);
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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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// 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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// RBX : address of the native function to call.
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// R10 : 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 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_tag_offset =
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NativeArguments::argc_tag_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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#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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__ movq(R8, Immediate(VMTag::kScriptTagId));
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__ cmpq(R8, Address(CTX, Isolate::vm_tag_offset()));
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__ j(EQUAL, &ok, Assembler::kNearJump);
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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 isolate is executing Native code.
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__ movq(Address(CTX, Isolate::vm_tag_offset()), RBX);
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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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__ subq(RSP, Immediate(sizeof(NativeArguments)));
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if (OS::ActivationFrameAlignment() > 1) {
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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_tag_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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// Pass the pointer to the NativeArguments.
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__ movq(CallingConventions::kArg1Reg, RSP);
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__ CallCFunction(RBX);
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// Mark that the isolate is executing Dart code.
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__ movq(Address(CTX, Isolate::vm_tag_offset()),
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Immediate(VMTag::kScriptTagId));
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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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__ LoadObject(R12, Object::null_object(), PP);
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__ movq(Address(CTX, Isolate::top_context_offset()), R12);
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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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// R10: arguments descriptor array.
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void StubCode::GenerateCallStaticFunctionStub(Assembler* assembler) {
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__ EnterStubFrame();
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__ pushq(R10); // Preserve arguments descriptor array.
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// Setup space on stack for return value.
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__ PushObject(Object::null_object(), PP);
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__ CallRuntime(kPatchStaticCallRuntimeEntry, 0);
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__ popq(RAX); // Get Code object result.
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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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__ LeaveStubFrame();
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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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// R10: arguments descriptor array.
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void StubCode::GenerateFixCallersTargetStub(Assembler* assembler) {
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__ EnterStubFrame();
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__ pushq(R10); // Preserve arguments descriptor array.
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// Setup space on stack for return value.
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__ PushObject(Object::null_object(), PP);
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__ CallRuntime(kFixCallersTargetRuntimeEntry, 0);
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__ popq(RAX); // Get Code object.
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__ popq(R10); // Restore arguments descriptor array.
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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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__ LeaveStubFrame();
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__ jmp(RAX);
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__ int3();
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}
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// Input parameters:
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// R10: smi-tagged argument count, may be zero.
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// RBP[kParamEndSlotFromFp + 1]: last argument.
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static void PushArgumentsArray(Assembler* assembler) {
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__ LoadObject(R12, Object::null_object(), PP);
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// Allocate array to store arguments of caller.
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__ movq(RBX, R12); // 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(RBP, R10, TIMES_8, kParamEndSlotFromFp * kWordSize));
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__ leaq(RBX, FieldAddress(RAX, Array::data_offset()));
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// R12: address of first argument on stack.
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// RBX: address of first argument in array.
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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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__ addq(RBX, Immediate(kWordSize));
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__ subq(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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DECLARE_LEAF_RUNTIME_ENTRY(intptr_t, DeoptimizeCopyFrame,
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intptr_t deopt_reason,
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uword saved_registers_address);
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DECLARE_LEAF_RUNTIME_ENTRY(void, DeoptimizeFillFrame, uword last_fp);
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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 EnterDartFrame(0, PP, kNoRegister) 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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// | ... | <- 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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bool preserve_result) {
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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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__ EnterFrame(0);
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__ pushq(Immediate(0));
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__ pushq(PP);
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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 - RAX);
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// Result in RAX 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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__ pushq(static_cast<Register>(i));
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}
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__ subq(RSP, Immediate(kNumberOfXmmRegisters * kFpuRegisterSize));
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intptr_t offset = 0;
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for (intptr_t reg_idx = 0; reg_idx < kNumberOfXmmRegisters; ++reg_idx) {
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XmmRegister xmm_reg = static_cast<XmmRegister>(reg_idx);
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__ movups(Address(RSP, offset), xmm_reg);
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offset += kFpuRegisterSize;
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}
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// Pass address of saved registers block.
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|
__ movq(CallingConventions::kArg1Reg, RSP);
|
|
__ ReserveAlignedFrameSpace(0); // Ensure stack is aligned before the call.
|
|
__ CallRuntime(kDeoptimizeCopyFrameRuntimeEntry, 1);
|
|
// Result (RAX) is stack-size (FP - SP) in bytes.
|
|
|
|
if (preserve_result) {
|
|
// Restore result into RBX temporarily.
|
|
__ movq(RBX, Address(RBP, saved_result_slot_from_fp * kWordSize));
|
|
}
|
|
|
|
// There is a Dart Frame on the stack. We must restore PP and leave frame.
|
|
__ LeaveDartFrame();
|
|
|
|
__ popq(RCX); // Preserve return address.
|
|
__ movq(RSP, RBP); // Discard optimized frame.
|
|
__ subq(RSP, RAX); // Reserve space for deoptimized frame.
|
|
__ pushq(RCX); // Restore return address.
|
|
|
|
// 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.
|
|
__ EnterFrame(0);
|
|
__ pushq(Immediate(0));
|
|
__ pushq(PP);
|
|
|
|
if (preserve_result) {
|
|
__ pushq(RBX); // Preserve result as first local.
|
|
}
|
|
__ ReserveAlignedFrameSpace(0);
|
|
// Pass last FP as a parameter.
|
|
__ movq(CallingConventions::kArg1Reg, RBP);
|
|
__ CallRuntime(kDeoptimizeFillFrameRuntimeEntry, 1);
|
|
if (preserve_result) {
|
|
// Restore result into RBX.
|
|
__ movq(RBX, Address(RBP, kFirstLocalSlotFromFp * kWordSize));
|
|
}
|
|
// Code above cannot cause GC.
|
|
// There is a Dart Frame on the stack. We must restore PP and leave frame.
|
|
__ LeaveDartFrame();
|
|
|
|
// 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.
|
|
__ EnterStubFrame();
|
|
if (preserve_result) {
|
|
__ pushq(Immediate(0)); // Workaround for dropped stack slot during GC.
|
|
__ pushq(RBX); // Preserve result, it will be GC-d here.
|
|
}
|
|
__ pushq(Immediate(Smi::RawValue(0))); // 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.
|
|
__ popq(RBX);
|
|
__ SmiUntag(RBX);
|
|
if (preserve_result) {
|
|
__ popq(RAX); // Restore result.
|
|
__ Drop(1); // Workaround for dropped stack slot during GC.
|
|
}
|
|
__ LeaveStubFrame();
|
|
|
|
__ popq(RCX); // Pop return address.
|
|
__ addq(RSP, RBX); // Remove materialization arguments.
|
|
__ pushq(RCX); // Push return address.
|
|
__ ret();
|
|
}
|
|
|
|
|
|
// TOS: return address + call-instruction-size (5 bytes).
|
|
// RAX: result, must be preserved
|
|
void StubCode::GenerateDeoptimizeLazyStub(Assembler* assembler) {
|
|
// Correct return address to point just after the call that is being
|
|
// deoptimized.
|
|
__ popq(RBX);
|
|
__ subq(RBX, Immediate(ShortCallPattern::InstructionLength()));
|
|
__ pushq(RBX);
|
|
GenerateDeoptimizationSequence(assembler, true); // Preserve RAX.
|
|
}
|
|
|
|
|
|
void StubCode::GenerateDeoptimizeStub(Assembler* assembler) {
|
|
GenerateDeoptimizationSequence(assembler, false); // Don't preserve RAX.
|
|
}
|
|
|
|
|
|
void StubCode::GenerateMegamorphicMissStub(Assembler* assembler) {
|
|
__ EnterStubFrame();
|
|
// Load the receiver into RAX. The argument count in the arguments
|
|
// descriptor in R10 is a smi.
|
|
__ movq(RAX, FieldAddress(R10, ArgumentsDescriptor::count_offset()));
|
|
// Three words (saved pp, saved fp, stub's pc marker)
|
|
// in the stack above the return address.
|
|
__ movq(RAX, Address(RSP, RAX, TIMES_4,
|
|
kSavedAboveReturnAddress * kWordSize));
|
|
// Preserve IC data and arguments descriptor.
|
|
__ pushq(RBX);
|
|
__ pushq(R10);
|
|
|
|
// Space for the result of the runtime call.
|
|
__ PushObject(Object::null_object(), PP);
|
|
__ pushq(RAX); // Receiver.
|
|
__ pushq(RBX); // IC data.
|
|
__ pushq(R10); // Arguments descriptor.
|
|
__ CallRuntime(kMegamorphicCacheMissHandlerRuntimeEntry, 3);
|
|
// Discard arguments.
|
|
__ popq(RAX);
|
|
__ popq(RAX);
|
|
__ popq(RAX);
|
|
__ popq(RAX); // Return value from the runtime call (function).
|
|
__ popq(R10); // Restore arguments descriptor.
|
|
__ popq(RBX); // Restore IC data.
|
|
__ LeaveStubFrame();
|
|
|
|
__ movq(RCX, FieldAddress(RAX, Function::instructions_offset()));
|
|
__ addq(RCX, Immediate(Instructions::HeaderSize() - kHeapObjectTag));
|
|
__ jmp(RCX);
|
|
}
|
|
|
|
|
|
// 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;
|
|
// Compute the size to be allocated, it is based on the array length
|
|
// and is computed as:
|
|
// RoundedAllocationSize((array_length * kwordSize) + sizeof(RawArray)).
|
|
__ movq(RDI, R10); // Array Length.
|
|
// Check that length is a positive Smi.
|
|
__ testq(RDI, Immediate(kSmiTagMask));
|
|
__ j(NOT_ZERO, &slow_case);
|
|
__ cmpq(RDI, Immediate(0));
|
|
__ j(LESS, &slow_case);
|
|
// Check for maximum allowed length.
|
|
const Immediate& max_len =
|
|
Immediate(reinterpret_cast<int64_t>(Smi::New(Array::kMaxElements)));
|
|
__ cmpq(RDI, max_len);
|
|
__ j(GREATER, &slow_case);
|
|
const intptr_t fixed_size = sizeof(RawArray) + kObjectAlignment - 1;
|
|
__ leaq(RDI, Address(RDI, TIMES_4, fixed_size)); // RDI is a Smi.
|
|
ASSERT(kSmiTagShift == 1);
|
|
__ andq(RDI, Immediate(-kObjectAlignment));
|
|
|
|
Isolate* isolate = Isolate::Current();
|
|
Heap* heap = isolate->heap();
|
|
|
|
__ movq(RAX, Immediate(heap->TopAddress()));
|
|
__ movq(RAX, Address(RAX, 0));
|
|
|
|
// RDI: allocation size.
|
|
__ movq(RCX, RAX);
|
|
__ addq(RCX, RDI);
|
|
__ j(CARRY, &slow_case);
|
|
|
|
// Check if the allocation fits into the remaining space.
|
|
// RAX: potential new object start.
|
|
// RCX: potential next object start.
|
|
// RDI: allocation size.
|
|
__ movq(R13, Immediate(heap->EndAddress()));
|
|
__ cmpq(RCX, Address(R13, 0));
|
|
__ j(ABOVE_EQUAL, &slow_case);
|
|
|
|
// Successfully allocated the object(s), now update top to point to
|
|
// next object start and initialize the object.
|
|
__ movq(R13, Immediate(heap->TopAddress()));
|
|
__ movq(Address(R13, 0), RCX);
|
|
__ addq(RAX, Immediate(kHeapObjectTag));
|
|
__ UpdateAllocationStatsWithSize(kArrayCid, RDI);
|
|
// Initialize the tags.
|
|
// RAX: new object start as a tagged pointer.
|
|
// RDI: allocation size.
|
|
{
|
|
Label size_tag_overflow, done;
|
|
__ cmpq(RDI, Immediate(RawObject::SizeTag::kMaxSizeTag));
|
|
__ j(ABOVE, &size_tag_overflow, Assembler::kNearJump);
|
|
__ shlq(RDI, Immediate(RawObject::kSizeTagPos - kObjectAlignmentLog2));
|
|
__ jmp(&done, Assembler::kNearJump);
|
|
|
|
__ Bind(&size_tag_overflow);
|
|
__ movq(RDI, Immediate(0));
|
|
__ Bind(&done);
|
|
|
|
// Get the class index and insert it into the tags.
|
|
const Class& cls = Class::Handle(isolate->object_store()->array_class());
|
|
__ orq(RDI, Immediate(RawObject::ClassIdTag::encode(cls.id())));
|
|
__ movq(FieldAddress(RAX, Array::tags_offset()), RDI); // Tags.
|
|
}
|
|
|
|
// RAX: new object start as a tagged pointer.
|
|
// Store the type argument field.
|
|
__ StoreIntoObjectNoBarrier(RAX,
|
|
FieldAddress(RAX, Array::type_arguments_offset()),
|
|
RBX);
|
|
|
|
// Set the length field.
|
|
__ StoreIntoObjectNoBarrier(RAX,
|
|
FieldAddress(RAX, Array::length_offset()),
|
|
R10);
|
|
|
|
// Initialize all array elements to raw_null.
|
|
// RAX: new object start as a tagged pointer.
|
|
// RCX: new object end address.
|
|
// RDI: iterator which initially points to the start of the variable
|
|
// data area to be initialized.
|
|
__ LoadObject(R12, Object::null_object(), PP);
|
|
__ leaq(RDI, FieldAddress(RAX, sizeof(RawArray)));
|
|
Label done;
|
|
Label init_loop;
|
|
__ Bind(&init_loop);
|
|
__ cmpq(RDI, RCX);
|
|
__ j(ABOVE_EQUAL, &done, Assembler::kNearJump);
|
|
__ movq(Address(RDI, 0), R12);
|
|
__ addq(RDI, Immediate(kWordSize));
|
|
__ jmp(&init_loop, Assembler::kNearJump);
|
|
__ Bind(&done);
|
|
__ ret(); // returns the newly allocated object in RAX.
|
|
|
|
// 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.
|
|
__ PushObject(Object::null_object(), PP);
|
|
__ pushq(R10); // Array length as Smi.
|
|
__ pushq(RBX); // Element type.
|
|
__ CallRuntime(kAllocateArrayRuntimeEntry, 2);
|
|
__ popq(RAX); // Pop element type argument.
|
|
__ popq(R10); // Pop array length argument.
|
|
__ popq(RAX); // Pop return value from return slot.
|
|
__ LeaveStubFrame();
|
|
__ ret();
|
|
}
|
|
|
|
|
|
// 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 : arguments array.
|
|
// RCX : new context containing the current isolate pointer.
|
|
void StubCode::GenerateInvokeDartCodeStub(Assembler* assembler) {
|
|
// Save frame pointer coming in.
|
|
__ EnterFrame(0);
|
|
|
|
const Register kEntryPointReg = CallingConventions::kArg1Reg;
|
|
const Register kArgDescReg = CallingConventions::kArg2Reg;
|
|
const Register kArgsReg = CallingConventions::kArg3Reg;
|
|
const Register kNewContextReg = CallingConventions::kArg4Reg;
|
|
|
|
// At this point, the stack looks like:
|
|
// | saved RBP | <-- RBP
|
|
// | saved PC (return to DartEntry::InvokeFunction) |
|
|
|
|
const intptr_t kInitialOffset = 1;
|
|
// Save arguments descriptor array and new context.
|
|
const intptr_t kArgumentsDescOffset = -(kInitialOffset) * kWordSize;
|
|
__ pushq(kArgDescReg);
|
|
const intptr_t kNewContextOffset = -(kInitialOffset + 1) * kWordSize;
|
|
__ pushq(kNewContextReg);
|
|
|
|
// Save C++ ABI callee-saved registers.
|
|
__ PushRegisters(CallingConventions::kCalleeSaveCpuRegisters,
|
|
CallingConventions::kCalleeSaveXmmRegisters);
|
|
|
|
// We now load the pool pointer(PP) as we are about to invoke dart code and we
|
|
// could potentially invoke some intrinsic functions which need the PP to be
|
|
// set up.
|
|
__ LoadPoolPointer(PP);
|
|
|
|
// If any additional (or fewer) values are pushed, the offsets in
|
|
// kExitLinkSlotFromEntryFp and kSavedContextSlotFromEntryFp will need to be
|
|
// changed.
|
|
|
|
// 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(kNewContextReg, VMHandles::kOffsetOfRawPtrInHandle));
|
|
|
|
const Register kIsolateReg = RBX;
|
|
|
|
// Load Isolate pointer from Context structure into R8.
|
|
__ movq(kIsolateReg, FieldAddress(CTX, Context::isolate_offset()));
|
|
|
|
// Save the current VMTag on the stack.
|
|
__ movq(RAX, Address(kIsolateReg, Isolate::vm_tag_offset()));
|
|
__ pushq(RAX);
|
|
#if defined(DEBUG)
|
|
{
|
|
Label ok;
|
|
__ leaq(RAX, Address(RBP, kSavedVMTagSlotFromEntryFp * kWordSize));
|
|
__ cmpq(RAX, RSP);
|
|
__ j(EQUAL, &ok);
|
|
__ Stop("kSavedVMTagSlotFromEntryFp mismatch");
|
|
__ Bind(&ok);
|
|
}
|
|
#endif
|
|
|
|
// Mark that the isolate is executing Dart code.
|
|
__ movq(Address(kIsolateReg, Isolate::vm_tag_offset()),
|
|
Immediate(VMTag::kScriptTagId));
|
|
|
|
// Save the top exit frame info. Use RAX as a temporary register.
|
|
// StackFrameIterator reads the top exit frame info saved in this frame.
|
|
// The constant kExitLinkSlotFromEntryFp must be kept in sync with the
|
|
// code below.
|
|
__ movq(RAX, Address(kIsolateReg, Isolate::top_exit_frame_info_offset()));
|
|
__ pushq(RAX);
|
|
#if defined(DEBUG)
|
|
{
|
|
Label ok;
|
|
__ leaq(RAX, Address(RBP, kExitLinkSlotFromEntryFp * kWordSize));
|
|
__ cmpq(RAX, RSP);
|
|
__ j(EQUAL, &ok);
|
|
__ Stop("kExitLinkSlotFromEntryFp mismatch");
|
|
__ Bind(&ok);
|
|
}
|
|
#endif
|
|
|
|
__ movq(Address(kIsolateReg, Isolate::top_exit_frame_info_offset()),
|
|
Immediate(0));
|
|
|
|
// 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 - kExitLinkSlotFromEntryFp * kWordSize.
|
|
// EntryFrame::SavedContext reads the context saved in this frame.
|
|
// The constant kSavedContextSlotFromEntryFp must be kept in sync with
|
|
// the code below.
|
|
__ movq(RAX, Address(kIsolateReg, Isolate::top_context_offset()));
|
|
__ pushq(RAX);
|
|
#if defined(DEBUG)
|
|
{
|
|
Label ok;
|
|
__ leaq(RAX, Address(RBP, kSavedContextSlotFromEntryFp * kWordSize));
|
|
__ cmpq(RAX, RSP);
|
|
__ j(EQUAL, &ok);
|
|
__ Stop("kSavedContextSlotFromEntryFp mismatch");
|
|
__ Bind(&ok);
|
|
}
|
|
#endif
|
|
|
|
// Load arguments descriptor array into R10, which is passed to Dart code.
|
|
__ movq(R10, Address(kArgDescReg, VMHandles::kOffsetOfRawPtrInHandle));
|
|
|
|
// Push arguments. At this point we only need to preserve kEntryPointReg.
|
|
ASSERT(kEntryPointReg != RDX);
|
|
|
|
// Load number of arguments into RBX.
|
|
__ movq(RBX, FieldAddress(R10, ArgumentsDescriptor::count_offset()));
|
|
__ SmiUntag(RBX);
|
|
|
|
// Compute address of 'arguments array' data area into RDX.
|
|
__ movq(RDX, Address(kArgsReg, VMHandles::kOffsetOfRawPtrInHandle));
|
|
__ leaq(RDX, FieldAddress(RDX, Array::data_offset()));
|
|
|
|
// 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);
|
|
__ pushq(Address(RDX, RAX, TIMES_8, 0));
|
|
__ incq(RAX);
|
|
__ cmpq(RAX, RBX);
|
|
__ j(LESS, &push_arguments, Assembler::kNearJump);
|
|
__ Bind(&done_push_arguments);
|
|
|
|
// Call the Dart code entrypoint.
|
|
__ call(kEntryPointReg); // R10 is the arguments descriptor array.
|
|
|
|
// Restore CTX from the saved context handle.
|
|
__ movq(CTX, Address(RBP, kNewContextOffset));
|
|
__ movq(CTX, Address(CTX, VMHandles::kOffsetOfRawPtrInHandle));
|
|
|
|
// Read the saved arguments descriptor array to obtain the number of passed
|
|
// arguments.
|
|
__ movq(kArgDescReg, Address(RBP, kArgumentsDescOffset));
|
|
__ movq(R10, Address(kArgDescReg, VMHandles::kOffsetOfRawPtrInHandle));
|
|
__ movq(RDX, FieldAddress(R10, ArgumentsDescriptor::count_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(kIsolateReg, FieldAddress(CTX, Context::isolate_offset()));
|
|
|
|
// Restore the saved Context pointer into the Isolate structure.
|
|
__ popq(RDX);
|
|
__ movq(Address(kIsolateReg, Isolate::top_context_offset()), RDX);
|
|
|
|
// Restore the saved top exit frame info back into the Isolate structure.
|
|
__ popq(RDX);
|
|
__ movq(Address(kIsolateReg, Isolate::top_exit_frame_info_offset()), RDX);
|
|
|
|
// Restore the current VMTag from the stack.
|
|
__ popq(RDX);
|
|
__ movq(Address(kIsolateReg, Isolate::vm_tag_offset()), RDX);
|
|
|
|
// Restore C++ ABI callee-saved registers.
|
|
__ PopRegisters(CallingConventions::kCalleeSaveCpuRegisters,
|
|
CallingConventions::kCalleeSaveXmmRegisters);
|
|
|
|
// 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) {
|
|
__ LoadObject(R12, Object::null_object(), PP);
|
|
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));
|
|
// R13: Size of allocation in bytes.
|
|
__ subq(R13, RAX);
|
|
__ UpdateAllocationStatsWithSize(context_class.id(), 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::kSizeTagPos - kObjectAlignmentLog2));
|
|
__ jmp(&done);
|
|
|
|
__ Bind(&size_tag_overflow);
|
|
// Set overflow size tag value.
|
|
__ movq(R13, Immediate(0));
|
|
|
|
__ Bind(&done);
|
|
// RAX: new object.
|
|
// R10: number of context variables.
|
|
// R13: size and bit tags.
|
|
__ orq(R13,
|
|
Immediate(RawObject::ClassIdTag::encode(context_class.id())));
|
|
__ movq(FieldAddress(RAX, Context::tags_offset()), R13); // Tags.
|
|
}
|
|
|
|
// 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);
|
|
|
|
// Setup the parent field.
|
|
// RAX: new object.
|
|
// R10: number of context variables.
|
|
__ movq(FieldAddress(RAX, Context::parent_offset()), R12);
|
|
|
|
// 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), R12);
|
|
__ 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.
|
|
__ EnterStubFrame();
|
|
__ pushq(R12); // Setup space on stack for the return value.
|
|
__ SmiTag(R10);
|
|
__ pushq(R10); // Push number of context variables.
|
|
__ CallRuntime(kAllocateContextRuntimeEntry, 1); // Allocate context.
|
|
__ popq(RAX); // Pop number of context variables argument.
|
|
__ popq(RAX); // Pop the new context object.
|
|
// RAX: new object
|
|
// Restore the frame pointer.
|
|
__ LeaveStubFrame();
|
|
__ ret();
|
|
}
|
|
|
|
|
|
DECLARE_LEAF_RUNTIME_ENTRY(void, StoreBufferBlockProcess, Isolate* isolate);
|
|
|
|
// Helper stub to implement Assembler::StoreIntoObject.
|
|
// Input parameters:
|
|
// RAX: Address being stored
|
|
void StubCode::GenerateUpdateStoreBufferStub(Assembler* assembler) {
|
|
// Save registers being destroyed.
|
|
__ pushq(RDX);
|
|
__ pushq(RCX);
|
|
|
|
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.
|
|
// Spilled: RDX, RCX
|
|
// RAX: Address being stored
|
|
__ movq(RCX, FieldAddress(RAX, Object::tags_offset()));
|
|
__ testq(RCX, Immediate(1 << RawObject::kRememberedBit));
|
|
__ j(EQUAL, &add_to_buffer, Assembler::kNearJump);
|
|
__ popq(RCX);
|
|
__ popq(RDX);
|
|
__ ret();
|
|
|
|
__ Bind(&add_to_buffer);
|
|
__ orq(RCX, Immediate(1 << RawObject::kRememberedBit));
|
|
__ movq(FieldAddress(RAX, Object::tags_offset()), RCX);
|
|
|
|
// Load the isolate out of the context.
|
|
// RAX: Address being stored
|
|
__ movq(RDX, FieldAddress(CTX, Context::isolate_offset()));
|
|
|
|
// Load the StoreBuffer block out of the isolate. Then load top_ out of the
|
|
// StoreBufferBlock and add the address to the pointers_.
|
|
// RAX: Address being stored
|
|
// RDX: Isolate
|
|
__ movq(RDX, Address(RDX, Isolate::store_buffer_offset()));
|
|
__ movl(RCX, Address(RDX, StoreBufferBlock::top_offset()));
|
|
__ movq(Address(RDX, RCX, TIMES_8, StoreBufferBlock::pointers_offset()), RAX);
|
|
|
|
// Increment top_ and check for overflow.
|
|
// RCX: top_
|
|
// RDX: StoreBufferBlock
|
|
Label L;
|
|
__ incq(RCX);
|
|
__ movl(Address(RDX, StoreBufferBlock::top_offset()), RCX);
|
|
__ cmpl(RCX, Immediate(StoreBufferBlock::kSize));
|
|
// Restore values.
|
|
__ popq(RCX);
|
|
__ popq(RDX);
|
|
__ j(EQUAL, &L, Assembler::kNearJump);
|
|
__ ret();
|
|
|
|
// Handle overflow: Call the runtime leaf function.
|
|
__ Bind(&L);
|
|
// Setup frame, push callee-saved registers.
|
|
__ EnterCallRuntimeFrame(0);
|
|
__ movq(CallingConventions::kArg1Reg,
|
|
FieldAddress(CTX, Context::isolate_offset()));
|
|
__ CallRuntime(kStoreBufferBlockProcessRuntimeEntry, 1);
|
|
__ LeaveCallRuntimeFrame();
|
|
__ ret();
|
|
}
|
|
|
|
|
|
// Called for inline allocation of objects.
|
|
// Input parameters:
|
|
// RSP + 8 : type arguments object (only if class is parameterized).
|
|
// RSP : points to return address.
|
|
void StubCode::GenerateAllocationStubForClass(Assembler* assembler,
|
|
const Class& cls) {
|
|
const intptr_t kObjectTypeArgumentsOffset = 1 * kWordSize;
|
|
// 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; // In words.
|
|
const intptr_t instance_size = cls.instance_size();
|
|
ASSERT(instance_size > 0);
|
|
__ LoadObject(R12, Object::null_object(), PP);
|
|
if (is_cls_parameterized) {
|
|
__ movq(RDX, Address(RSP, kObjectTypeArgumentsOffset));
|
|
// RDX: instantiated type arguments.
|
|
}
|
|
if (FLAG_inline_alloc && Heap::IsAllocatableInNewSpace(instance_size)) {
|
|
Label slow_case;
|
|
// Allocate the object and update top to point to
|
|
// next object start and initialize the allocated object.
|
|
// RDX: instantiated type arguments (if is_cls_parameterized).
|
|
Heap* heap = Isolate::Current()->heap();
|
|
__ movq(RCX, Immediate(heap->TopAddress()));
|
|
__ movq(RAX, Address(RCX, 0));
|
|
__ leaq(RBX, Address(RAX, instance_size));
|
|
// Check if the allocation fits into the remaining space.
|
|
// RAX: potential new object start.
|
|
// RBX: potential next object start.
|
|
// RCX: heap top address.
|
|
__ movq(R13, Immediate(heap->EndAddress()));
|
|
__ cmpq(RBX, Address(R13, 0));
|
|
if (FLAG_use_slow_path) {
|
|
__ jmp(&slow_case);
|
|
} else {
|
|
__ j(ABOVE_EQUAL, &slow_case);
|
|
}
|
|
__ movq(Address(RCX, 0), RBX);
|
|
__ UpdateAllocationStats(cls.id());
|
|
|
|
// RAX: new object start.
|
|
// RBX: next object start.
|
|
// RDX: 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);
|
|
__ movq(Address(RAX, Instance::tags_offset()), Immediate(tags));
|
|
|
|
// Initialize the remaining words of the object.
|
|
// RAX: new object start.
|
|
// RBX: next object start.
|
|
// RDX: new object type arguments (if is_cls_parameterized).
|
|
// R12: raw null.
|
|
// 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) {
|
|
__ movq(Address(RAX, current_offset), R12);
|
|
}
|
|
} else {
|
|
__ leaq(RCX, Address(RAX, Instance::NextFieldOffset()));
|
|
// Loop until the whole object is initialized.
|
|
// RAX: new object.
|
|
// RBX: next object start.
|
|
// RCX: next word to be initialized.
|
|
// RDX: new object type arguments (if is_cls_parameterized).
|
|
Label init_loop;
|
|
Label done;
|
|
__ Bind(&init_loop);
|
|
__ cmpq(RCX, RBX);
|
|
__ j(ABOVE_EQUAL, &done, Assembler::kNearJump);
|
|
__ movq(Address(RCX, 0), R12);
|
|
__ addq(RCX, Immediate(kWordSize));
|
|
__ jmp(&init_loop, Assembler::kNearJump);
|
|
__ Bind(&done);
|
|
}
|
|
if (is_cls_parameterized) {
|
|
// RDX: new object type arguments.
|
|
// Set the type arguments in the new object.
|
|
__ movq(Address(RAX, cls.type_arguments_field_offset()), RDX);
|
|
}
|
|
// Done allocating and initializing the instance.
|
|
// RAX: new object.
|
|
__ addq(RAX, Immediate(kHeapObjectTag));
|
|
__ ret();
|
|
|
|
__ Bind(&slow_case);
|
|
}
|
|
// If is_cls_parameterized:
|
|
// RDX: new object type arguments.
|
|
// Create a stub frame.
|
|
__ EnterStubFrame(true); // Uses PP to access class object.
|
|
__ pushq(R12); // Setup space on stack for return value.
|
|
__ PushObject(cls, PP); // Push class of object to be allocated.
|
|
if (is_cls_parameterized) {
|
|
__ pushq(RDX); // Push type arguments of object to be allocated.
|
|
} else {
|
|
__ pushq(R12); // Push null type arguments.
|
|
}
|
|
__ CallRuntime(kAllocateObjectRuntimeEntry, 2); // Allocate object.
|
|
__ 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.
|
|
__ 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:
|
|
// RSP : points to return address.
|
|
// RSP + 8 : address of last argument.
|
|
// RBX : ic-data.
|
|
// R10 : arguments descriptor array.
|
|
void StubCode::GenerateCallNoSuchMethodFunctionStub(Assembler* assembler) {
|
|
__ EnterStubFrame();
|
|
|
|
// Load the receiver.
|
|
__ movq(R13, FieldAddress(R10, ArgumentsDescriptor::count_offset()));
|
|
__ movq(RAX, Address(RBP, R13, TIMES_4, kParamEndSlotFromFp * kWordSize));
|
|
|
|
__ LoadObject(R12, Object::null_object(), PP);
|
|
__ pushq(R12); // Setup space on stack for result from noSuchMethod.
|
|
__ pushq(RAX); // Receiver.
|
|
__ pushq(RBX); // IC data array.
|
|
__ pushq(R10); // Arguments descriptor array.
|
|
|
|
__ movq(R10, R13); // Smi-tagged arguments array length.
|
|
PushArgumentsArray(assembler);
|
|
|
|
__ CallRuntime(kInvokeNoSuchMethodFunctionRuntimeEntry, 4);
|
|
|
|
// Remove arguments.
|
|
__ Drop(4);
|
|
__ popq(RAX); // Get result into RAX.
|
|
|
|
// Remove the stub frame as we are about to return.
|
|
__ LeaveStubFrame();
|
|
__ ret();
|
|
}
|
|
|
|
|
|
// 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 = RBX;
|
|
Register func_reg = RDI;
|
|
if (FLAG_trace_optimized_ic_calls) {
|
|
__ EnterStubFrame();
|
|
__ pushq(func_reg); // Preserve
|
|
__ pushq(ic_reg); // Preserve.
|
|
__ pushq(ic_reg); // Argument.
|
|
__ pushq(func_reg); // Argument.
|
|
__ CallRuntime(kTraceICCallRuntimeEntry, 2);
|
|
__ popq(RAX); // Discard argument;
|
|
__ popq(RAX); // Discard argument;
|
|
__ popq(ic_reg); // Restore.
|
|
__ popq(func_reg); // Restore.
|
|
__ LeaveStubFrame();
|
|
}
|
|
__ incl(FieldAddress(func_reg, Function::usage_counter_offset()));
|
|
}
|
|
|
|
|
|
// Loads function into 'temp_reg', preserves 'ic_reg'.
|
|
void StubCode::GenerateUsageCounterIncrement(Assembler* assembler,
|
|
Register temp_reg) {
|
|
Register ic_reg = RBX;
|
|
Register func_reg = temp_reg;
|
|
ASSERT(ic_reg != func_reg);
|
|
__ movq(func_reg, FieldAddress(ic_reg, ICData::owner_offset()));
|
|
__ incl(FieldAddress(func_reg, Function::usage_counter_offset()));
|
|
}
|
|
|
|
|
|
// Generate inline cache check for 'num_args'.
|
|
// RBX: Inline cache data object.
|
|
// 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,
|
|
const RuntimeEntry& handle_ic_miss) {
|
|
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'.
|
|
__ movl(RCX, FieldAddress(RBX, ICData::state_bits_offset()));
|
|
ASSERT(ICData::NumArgsTestedShift() == 0); // No shift needed.
|
|
__ andq(RCX, Immediate(ICData::NumArgsTestedMask()));
|
|
__ cmpq(RCX, Immediate(num_args));
|
|
__ j(EQUAL, &ok, Assembler::kNearJump);
|
|
__ Stop("Incorrect stub for IC data");
|
|
__ Bind(&ok);
|
|
}
|
|
#endif // DEBUG
|
|
|
|
if (FLAG_enable_debugger) {
|
|
// Check single stepping.
|
|
Label not_stepping;
|
|
__ movq(RAX, FieldAddress(CTX, Context::isolate_offset()));
|
|
__ movzxb(RAX, Address(RAX, Isolate::single_step_offset()));
|
|
__ cmpq(RAX, Immediate(0));
|
|
__ j(EQUAL, ¬_stepping, Assembler::kNearJump);
|
|
__ EnterStubFrame();
|
|
__ pushq(RBX);
|
|
__ CallRuntime(kSingleStepHandlerRuntimeEntry, 0);
|
|
__ popq(RBX);
|
|
__ LeaveStubFrame();
|
|
__ Bind(¬_stepping);
|
|
}
|
|
|
|
// Load arguments descriptor into R10.
|
|
__ movq(R10, FieldAddress(RBX, ICData::arguments_descriptor_offset()));
|
|
// Loop that checks if there is an IC data match.
|
|
Label loop, update, test, found;
|
|
// 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.
|
|
|
|
// Get the receiver's class ID (first read number of arguments from
|
|
// arguments descriptor array and then access the receiver from the stack).
|
|
__ movq(RAX, FieldAddress(R10, ArgumentsDescriptor::count_offset()));
|
|
__ movq(RAX, Address(RSP, RAX, TIMES_4, 0)); // RAX (argument count) is Smi.
|
|
__ LoadTaggedClassIdMayBeSmi(RAX, RAX);
|
|
// RAX: receiver's class ID as smi.
|
|
__ movq(R13, Address(R12, 0)); // First class ID (Smi) to check.
|
|
__ jmp(&test);
|
|
|
|
__ Bind(&loop);
|
|
for (int i = 0; i < num_args; i++) {
|
|
if (i > 0) {
|
|
// If not the first, load the next argument's class ID.
|
|
__ movq(RAX, FieldAddress(R10, ArgumentsDescriptor::count_offset()));
|
|
__ movq(RAX, Address(RSP, RAX, TIMES_4, - i * kWordSize));
|
|
__ LoadTaggedClassIdMayBeSmi(RAX, RAX);
|
|
// RAX: next argument class ID (smi).
|
|
__ movq(R13, Address(R12, i * kWordSize));
|
|
// R13: next class ID to check (smi).
|
|
}
|
|
__ cmpq(RAX, R13); // Class id match?
|
|
if (i < (num_args - 1)) {
|
|
__ j(NOT_EQUAL, &update); // Continue.
|
|
} else {
|
|
// Last check, all checks before matched.
|
|
__ j(EQUAL, &found); // Break.
|
|
}
|
|
}
|
|
__ Bind(&update);
|
|
// Reload receiver class ID. It has not been destroyed when num_args == 1.
|
|
if (num_args > 1) {
|
|
__ movq(RAX, FieldAddress(R10, ArgumentsDescriptor::count_offset()));
|
|
__ movq(RAX, Address(RSP, RAX, TIMES_4, 0));
|
|
__ LoadTaggedClassIdMayBeSmi(RAX, RAX);
|
|
}
|
|
|
|
const intptr_t entry_size = ICData::TestEntryLengthFor(num_args) * kWordSize;
|
|
__ addq(R12, Immediate(entry_size)); // Next entry.
|
|
__ movq(R13, Address(R12, 0)); // Next class ID.
|
|
|
|
__ Bind(&test);
|
|
__ cmpq(R13, Immediate(Smi::RawValue(kIllegalCid))); // Done?
|
|
__ j(NOT_EQUAL, &loop, Assembler::kNearJump);
|
|
|
|
// IC miss.
|
|
__ LoadObject(R12, Object::null_object(), PP);
|
|
// Compute address of arguments (first read number of arguments from
|
|
// arguments descriptor array and then compute address on the stack).
|
|
__ movq(RAX, FieldAddress(R10, ArgumentsDescriptor::count_offset()));
|
|
__ leaq(RAX, Address(RSP, RAX, TIMES_4, 0)); // RAX is Smi.
|
|
__ EnterStubFrame();
|
|
__ pushq(R10); // Preserve arguments descriptor array.
|
|
__ pushq(RBX); // Preserve IC data object.
|
|
__ pushq(R12); // Setup space on stack for result (target code object).
|
|
// Push call arguments.
|
|
for (intptr_t i = 0; i < num_args; i++) {
|
|
__ movq(RCX, Address(RAX, -kWordSize * i));
|
|
__ pushq(RCX);
|
|
}
|
|
__ pushq(RBX); // Pass IC data object.
|
|
__ CallRuntime(handle_ic_miss, num_args + 1);
|
|
// Remove the call arguments pushed earlier, including the IC data object.
|
|
for (intptr_t i = 0; i < num_args + 1; i++) {
|
|
__ popq(RAX);
|
|
}
|
|
__ popq(RAX); // Pop returned function object into RAX.
|
|
__ popq(RBX); // Restore IC data array.
|
|
__ popq(R10); // Restore arguments descriptor array.
|
|
__ LeaveStubFrame();
|
|
Label call_target_function;
|
|
__ jmp(&call_target_function);
|
|
|
|
__ Bind(&found);
|
|
// R12: 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;
|
|
__ movq(RAX, Address(R12, target_offset));
|
|
__ addq(Address(R12, count_offset), Immediate(Smi::RawValue(1)));
|
|
__ j(NO_OVERFLOW, &call_target_function, Assembler::kNearJump);
|
|
__ movq(Address(R12, count_offset),
|
|
Immediate(Smi::RawValue(Smi::kMaxValue)));
|
|
|
|
__ Bind(&call_target_function);
|
|
// RAX: Target function.
|
|
Label is_compiled;
|
|
__ movq(RCX, FieldAddress(RAX, Function::instructions_offset()));
|
|
__ addq(RCX, Immediate(Instructions::HeaderSize() - kHeapObjectTag));
|
|
__ jmp(RCX);
|
|
}
|
|
|
|
|
|
// Use inline cache data array to invoke the target or continue in inline
|
|
// cache miss handler. Stub for 1-argument check (receiver class).
|
|
// RBX: Inline cache data object.
|
|
// TOS(0): Return address.
|
|
// 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, RCX);
|
|
GenerateNArgsCheckInlineCacheStub(
|
|
assembler, 1, kInlineCacheMissHandlerOneArgRuntimeEntry);
|
|
}
|
|
|
|
|
|
void StubCode::GenerateTwoArgsCheckInlineCacheStub(Assembler* assembler) {
|
|
GenerateUsageCounterIncrement(assembler, RCX);
|
|
GenerateNArgsCheckInlineCacheStub(
|
|
assembler, 2, kInlineCacheMissHandlerTwoArgsRuntimeEntry);
|
|
}
|
|
|
|
|
|
void StubCode::GenerateThreeArgsCheckInlineCacheStub(Assembler* assembler) {
|
|
GenerateUsageCounterIncrement(assembler, RCX);
|
|
GenerateNArgsCheckInlineCacheStub(
|
|
assembler, 3, kInlineCacheMissHandlerThreeArgsRuntimeEntry);
|
|
}
|
|
|
|
// Use inline cache data array to invoke the target or continue in inline
|
|
// cache miss handler. Stub for 1-argument check (receiver class).
|
|
// RDI: function which counter needs to be incremented.
|
|
// RBX: Inline cache data object.
|
|
// TOS(0): Return address.
|
|
// 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::GenerateOneArgOptimizedCheckInlineCacheStub(
|
|
Assembler* assembler) {
|
|
GenerateOptimizedUsageCounterIncrement(assembler);
|
|
GenerateNArgsCheckInlineCacheStub(
|
|
assembler, 1, kInlineCacheMissHandlerOneArgRuntimeEntry);
|
|
}
|
|
|
|
|
|
void StubCode::GenerateTwoArgsOptimizedCheckInlineCacheStub(
|
|
Assembler* assembler) {
|
|
GenerateOptimizedUsageCounterIncrement(assembler);
|
|
GenerateNArgsCheckInlineCacheStub(
|
|
assembler, 2, kInlineCacheMissHandlerTwoArgsRuntimeEntry);
|
|
}
|
|
|
|
|
|
void StubCode::GenerateThreeArgsOptimizedCheckInlineCacheStub(
|
|
Assembler* assembler) {
|
|
GenerateOptimizedUsageCounterIncrement(assembler);
|
|
GenerateNArgsCheckInlineCacheStub(
|
|
assembler, 3, kInlineCacheMissHandlerThreeArgsRuntimeEntry);
|
|
}
|
|
|
|
|
|
// Do not count as no type feedback is collected.
|
|
void StubCode::GenerateClosureCallInlineCacheStub(Assembler* assembler) {
|
|
GenerateNArgsCheckInlineCacheStub(
|
|
assembler, 1, kInlineCacheMissHandlerOneArgRuntimeEntry);
|
|
}
|
|
|
|
|
|
// Intermediary stub between a static call and its target. ICData contains
|
|
// the target function and the call count.
|
|
// RBX: ICData
|
|
void StubCode::GenerateZeroArgsUnoptimizedStaticCallStub(Assembler* assembler) {
|
|
GenerateUsageCounterIncrement(assembler, RCX);
|
|
#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'.
|
|
__ movl(RCX, FieldAddress(RBX, ICData::state_bits_offset()));
|
|
ASSERT(ICData::NumArgsTestedShift() == 0); // No shift needed.
|
|
__ andq(RCX, Immediate(ICData::NumArgsTestedMask()));
|
|
__ cmpq(RCX, Immediate(0));
|
|
__ j(EQUAL, &ok, Assembler::kNearJump);
|
|
__ Stop("Incorrect IC data for unoptimized static call");
|
|
__ Bind(&ok);
|
|
}
|
|
#endif // DEBUG
|
|
|
|
if (FLAG_enable_debugger) {
|
|
// Check single stepping.
|
|
Label not_stepping;
|
|
__ movq(RAX, FieldAddress(CTX, Context::isolate_offset()));
|
|
__ movzxb(RAX, Address(RAX, Isolate::single_step_offset()));
|
|
__ cmpq(RAX, Immediate(0));
|
|
__ j(EQUAL, ¬_stepping, Assembler::kNearJump);
|
|
__ EnterStubFrame();
|
|
__ pushq(RBX); // Preserve IC data object.
|
|
__ CallRuntime(kSingleStepHandlerRuntimeEntry, 0);
|
|
__ popq(RBX);
|
|
__ LeaveStubFrame();
|
|
__ Bind(¬_stepping);
|
|
}
|
|
|
|
// RBX: IC data object (preserved).
|
|
__ movq(R12, FieldAddress(RBX, ICData::ic_data_offset()));
|
|
// R12: ic_data_array with entries: target functions and count.
|
|
__ leaq(R12, FieldAddress(R12, Array::data_offset()));
|
|
// R12: 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;
|
|
|
|
// Increment count for this call.
|
|
Label increment_done;
|
|
__ addq(Address(R12, count_offset), Immediate(Smi::RawValue(1)));
|
|
__ j(NO_OVERFLOW, &increment_done, Assembler::kNearJump);
|
|
__ movq(Address(R12, count_offset),
|
|
Immediate(Smi::RawValue(Smi::kMaxValue)));
|
|
__ Bind(&increment_done);
|
|
|
|
// Load arguments descriptor into R10.
|
|
__ movq(R10, FieldAddress(RBX, ICData::arguments_descriptor_offset()));
|
|
|
|
// Get function and call it, if possible.
|
|
__ movq(RAX, Address(R12, target_offset));
|
|
__ movq(RCX, FieldAddress(RAX, Function::instructions_offset()));
|
|
// RCX: Target instructions.
|
|
__ addq(RCX, Immediate(Instructions::HeaderSize() - kHeapObjectTag));
|
|
__ jmp(RCX);
|
|
}
|
|
|
|
|
|
void StubCode::GenerateTwoArgsUnoptimizedStaticCallStub(Assembler* assembler) {
|
|
GenerateUsageCounterIncrement(assembler, RCX);
|
|
GenerateNArgsCheckInlineCacheStub(
|
|
assembler, 2, kStaticCallMissHandlerTwoArgsRuntimeEntry);
|
|
}
|
|
|
|
|
|
// Stub for compiling a function and jumping to the compiled code.
|
|
// RCX: IC-Data (for methods).
|
|
// R10: Arguments descriptor.
|
|
// RAX: Function.
|
|
void StubCode::GenerateLazyCompileStub(Assembler* assembler) {
|
|
__ EnterStubFrame();
|
|
__ pushq(R10); // Preserve arguments descriptor array.
|
|
__ pushq(RBX); // Preserve IC data object.
|
|
__ pushq(RAX); // Pass function.
|
|
__ CallRuntime(kCompileFunctionRuntimeEntry, 1);
|
|
__ popq(RAX); // Restore function.
|
|
__ popq(RBX); // Restore IC data array.
|
|
__ popq(R10); // Restore arguments descriptor array.
|
|
__ LeaveStubFrame();
|
|
|
|
__ movq(RAX, FieldAddress(RAX, Function::instructions_offset()));
|
|
__ addq(RAX, Immediate(Instructions::HeaderSize() - kHeapObjectTag));
|
|
__ jmp(RAX);
|
|
}
|
|
|
|
|
|
// RBX, R10: May contain arguments to runtime stub.
|
|
// TOS(0): return address (Dart code).
|
|
void StubCode::GenerateBreakpointRuntimeStub(Assembler* assembler) {
|
|
__ EnterStubFrame();
|
|
// Preserve runtime args.
|
|
__ pushq(RBX);
|
|
__ pushq(R10);
|
|
// Room for result. Debugger stub returns address of the
|
|
// unpatched runtime stub.
|
|
__ LoadObject(R12, Object::null_object(), PP);
|
|
__ pushq(R12); // Room for result.
|
|
__ CallRuntime(kBreakpointRuntimeHandlerRuntimeEntry, 0);
|
|
__ popq(RAX); // Address of original.
|
|
__ popq(R10); // Restore arguments.
|
|
__ popq(RBX);
|
|
__ LeaveStubFrame();
|
|
__ jmp(RAX); // Jump to original stub.
|
|
}
|
|
|
|
|
|
// Called only from unoptimized code.
|
|
void StubCode::GenerateDebugStepCheckStub(Assembler* assembler) {
|
|
if (FLAG_enable_debugger) {
|
|
// Check single stepping.
|
|
Label not_stepping;
|
|
__ movq(RAX, FieldAddress(CTX, Context::isolate_offset()));
|
|
__ movzxb(RAX, Address(RAX, Isolate::single_step_offset()));
|
|
__ cmpq(RAX, Immediate(0));
|
|
__ j(EQUAL, ¬_stepping, Assembler::kNearJump);
|
|
|
|
__ EnterStubFrame();
|
|
__ CallRuntime(kSingleStepHandlerRuntimeEntry, 0);
|
|
__ LeaveStubFrame();
|
|
__ Bind(¬_stepping);
|
|
}
|
|
__ ret();
|
|
}
|
|
|
|
|
|
// Used to check class and type arguments. Arguments passed on stack:
|
|
// TOS + 0: return address.
|
|
// TOS + 1: instantiator type arguments (can be NULL).
|
|
// TOS + 2: instance.
|
|
// TOS + 3: SubtypeTestCache.
|
|
// Result in RCX: null -> not found, otherwise result (true or false).
|
|
static void GenerateSubtypeNTestCacheStub(Assembler* assembler, int n) {
|
|
ASSERT((1 <= n) && (n <= 3));
|
|
const intptr_t kInstantiatorTypeArgumentsInBytes = 1 * kWordSize;
|
|
const intptr_t kInstanceOffsetInBytes = 2 * kWordSize;
|
|
const intptr_t kCacheOffsetInBytes = 3 * kWordSize;
|
|
__ movq(RAX, Address(RSP, kInstanceOffsetInBytes));
|
|
__ LoadObject(R12, Object::null_object(), PP);
|
|
if (n > 1) {
|
|
__ LoadClass(R10, RAX);
|
|
// Compute instance type arguments into R13.
|
|
Label has_no_type_arguments;
|
|
__ movq(R13, R12);
|
|
__ movl(RDI, FieldAddress(R10,
|
|
Class::type_arguments_field_offset_in_words_offset()));
|
|
__ cmpl(RDI, Immediate(Class::kNoTypeArguments));
|
|
__ j(EQUAL, &has_no_type_arguments, Assembler::kNearJump);
|
|
__ movq(R13, FieldAddress(RAX, RDI, TIMES_8, 0));
|
|
__ Bind(&has_no_type_arguments);
|
|
}
|
|
__ LoadClassId(R10, RAX);
|
|
// RAX: instance, R10: instance class id.
|
|
// R13: instance type arguments or null, used only if n > 1.
|
|
__ movq(RDX, Address(RSP, kCacheOffsetInBytes));
|
|
// RDX: SubtypeTestCache.
|
|
__ movq(RDX, FieldAddress(RDX, SubtypeTestCache::cache_offset()));
|
|
__ addq(RDX, Immediate(Array::data_offset() - kHeapObjectTag));
|
|
// RDX: Entry start.
|
|
// R10: instance class id.
|
|
// R13: instance type arguments.
|
|
Label loop, found, not_found, next_iteration;
|
|
__ SmiTag(R10);
|
|
__ Bind(&loop);
|
|
__ movq(RDI, Address(RDX, kWordSize * SubtypeTestCache::kInstanceClassId));
|
|
__ cmpq(RDI, R12);
|
|
__ j(EQUAL, ¬_found, Assembler::kNearJump);
|
|
__ cmpq(RDI, R10);
|
|
if (n == 1) {
|
|
__ j(EQUAL, &found, Assembler::kNearJump);
|
|
} else {
|
|
__ j(NOT_EQUAL, &next_iteration, Assembler::kNearJump);
|
|
__ movq(RDI,
|
|
Address(RDX, kWordSize * SubtypeTestCache::kInstanceTypeArguments));
|
|
__ cmpq(RDI, R13);
|
|
if (n == 2) {
|
|
__ j(EQUAL, &found, Assembler::kNearJump);
|
|
} else {
|
|
__ j(NOT_EQUAL, &next_iteration, Assembler::kNearJump);
|
|
__ movq(RDI,
|
|
Address(RDX,
|
|
kWordSize * SubtypeTestCache::kInstantiatorTypeArguments));
|
|
__ cmpq(RDI, Address(RSP, kInstantiatorTypeArgumentsInBytes));
|
|
__ j(EQUAL, &found, Assembler::kNearJump);
|
|
}
|
|
}
|
|
|
|
__ Bind(&next_iteration);
|
|
__ addq(RDX, Immediate(kWordSize * SubtypeTestCache::kTestEntryLength));
|
|
__ jmp(&loop, Assembler::kNearJump);
|
|
// Fall through to not found.
|
|
__ Bind(¬_found);
|
|
__ movq(RCX, R12);
|
|
__ ret();
|
|
|
|
__ Bind(&found);
|
|
__ movq(RCX, Address(RDX, 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 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::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);
|
|
}
|
|
|
|
|
|
// Return the current stack pointer address, used to stack alignment
|
|
// checks.
|
|
// TOS + 0: return address
|
|
// Result in RAX.
|
|
void StubCode::GenerateGetStackPointerStub(Assembler* assembler) {
|
|
__ leaq(RAX, Address(RSP, kWordSize));
|
|
__ ret();
|
|
}
|
|
|
|
|
|
// Jump to the exception or error handler.
|
|
// TOS + 0: return address
|
|
// Arg1: program counter
|
|
// Arg2: stack pointer
|
|
// Arg3: frame_pointer
|
|
// Arg4: exception object
|
|
// Arg5: stacktrace object
|
|
// No Result.
|
|
void StubCode::GenerateJumpToExceptionHandlerStub(Assembler* assembler) {
|
|
ASSERT(kExceptionObjectReg == RAX);
|
|
ASSERT(kStackTraceObjectReg == RDX);
|
|
ASSERT(CallingConventions::kArg4Reg != kStackTraceObjectReg);
|
|
ASSERT(CallingConventions::kArg1Reg != kStackTraceObjectReg);
|
|
|
|
#if defined(_WIN64)
|
|
Register stacktrace_reg = RBX;
|
|
__ movq(stacktrace_reg, Address(RSP, 5 * kWordSize));
|
|
#else
|
|
Register stacktrace_reg = CallingConventions::kArg5Reg;
|
|
#endif
|
|
|
|
__ movq(RBP, CallingConventions::kArg3Reg);
|
|
__ movq(RSP, CallingConventions::kArg2Reg);
|
|
__ movq(kStackTraceObjectReg, stacktrace_reg);
|
|
__ movq(kExceptionObjectReg, CallingConventions::kArg4Reg);
|
|
__ jmp(CallingConventions::kArg1Reg); // Jump to the exception handler code.
|
|
}
|
|
|
|
|
|
// Calls to the runtime to optimize the given function.
|
|
// RDI: function to be reoptimized.
|
|
// R10: argument descriptor (preserved).
|
|
void StubCode::GenerateOptimizeFunctionStub(Assembler* assembler) {
|
|
__ EnterStubFrame();
|
|
__ LoadObject(R12, Object::null_object(), PP);
|
|
__ pushq(R10);
|
|
__ pushq(R12); // Setup space on stack for return value.
|
|
__ pushq(RDI);
|
|
__ CallRuntime(kOptimizeInvokedFunctionRuntimeEntry, 1);
|
|
__ popq(RAX); // Disard argument.
|
|
__ popq(RAX); // Get Code object.
|
|
__ popq(R10); // Restore argument descriptor.
|
|
__ movq(RAX, FieldAddress(RAX, Code::instructions_offset()));
|
|
__ addq(RAX, Immediate(Instructions::HeaderSize() - kHeapObjectTag));
|
|
__ LeaveStubFrame();
|
|
__ jmp(RAX);
|
|
__ int3();
|
|
}
|
|
|
|
|
|
DECLARE_LEAF_RUNTIME_ENTRY(intptr_t,
|
|
BigintCompare,
|
|
RawBigint* left,
|
|
RawBigint* right);
|
|
|
|
|
|
// Does identical check (object references are equal or not equal) with special
|
|
// checks for boxed numbers.
|
|
// Left and right are pushed on stack.
|
|
// Return ZF set.
|
|
// Note: A Mint cannot contain a value that would fit in Smi, a Bigint
|
|
// cannot contain a value that fits in Mint or Smi.
|
|
void StubCode::GenerateIdenticalWithNumberCheckStub(Assembler* assembler,
|
|
const Register left,
|
|
const Register right,
|
|
const Register unused1,
|
|
const Register unused2) {
|
|
Label reference_compare, done, check_mint, check_bigint;
|
|
// If any of the arguments is Smi do reference compare.
|
|
__ testq(left, Immediate(kSmiTagMask));
|
|
__ j(ZERO, &reference_compare);
|
|
__ testq(right, Immediate(kSmiTagMask));
|
|
__ j(ZERO, &reference_compare);
|
|
|
|
// Value compare for two doubles.
|
|
__ CompareClassId(left, kDoubleCid);
|
|
__ j(NOT_EQUAL, &check_mint, Assembler::kNearJump);
|
|
__ CompareClassId(right, kDoubleCid);
|
|
__ j(NOT_EQUAL, &done, Assembler::kNearJump);
|
|
|
|
// Double values bitwise compare.
|
|
__ movq(left, FieldAddress(left, Double::value_offset()));
|
|
__ cmpq(left, FieldAddress(right, Double::value_offset()));
|
|
__ jmp(&done, Assembler::kNearJump);
|
|
|
|
__ Bind(&check_mint);
|
|
__ CompareClassId(left, kMintCid);
|
|
__ j(NOT_EQUAL, &check_bigint, Assembler::kNearJump);
|
|
__ CompareClassId(right, kMintCid);
|
|
__ j(NOT_EQUAL, &done, Assembler::kNearJump);
|
|
__ movq(left, FieldAddress(left, Mint::value_offset()));
|
|
__ cmpq(left, FieldAddress(right, Mint::value_offset()));
|
|
__ jmp(&done, Assembler::kNearJump);
|
|
|
|
__ Bind(&check_bigint);
|
|
__ CompareClassId(left, kBigintCid);
|
|
__ j(NOT_EQUAL, &reference_compare, Assembler::kNearJump);
|
|
__ CompareClassId(right, kBigintCid);
|
|
__ j(NOT_EQUAL, &done, Assembler::kNearJump);
|
|
__ EnterFrame(0);
|
|
__ ReserveAlignedFrameSpace(0);
|
|
__ movq(CallingConventions::kArg1Reg, left);
|
|
__ movq(CallingConventions::kArg2Reg, right);
|
|
__ CallRuntime(kBigintCompareRuntimeEntry, 2);
|
|
// Result in RAX, 0 means equal.
|
|
__ LeaveFrame();
|
|
__ cmpq(RAX, Immediate(0));
|
|
__ jmp(&done);
|
|
|
|
__ Bind(&reference_compare);
|
|
__ cmpq(left, right);
|
|
__ Bind(&done);
|
|
}
|
|
|
|
|
|
// Called only from unoptimized code. All relevant registers have been saved.
|
|
// TOS + 0: return address
|
|
// TOS + 1: right argument.
|
|
// TOS + 2: left argument.
|
|
// Returns ZF set.
|
|
void StubCode::GenerateUnoptimizedIdenticalWithNumberCheckStub(
|
|
Assembler* assembler) {
|
|
if (FLAG_enable_debugger) {
|
|
// Check single stepping.
|
|
Label not_stepping;
|
|
__ movq(RAX, FieldAddress(CTX, Context::isolate_offset()));
|
|
__ movzxb(RAX, Address(RAX, Isolate::single_step_offset()));
|
|
__ cmpq(RAX, Immediate(0));
|
|
__ j(EQUAL, ¬_stepping, Assembler::kNearJump);
|
|
__ EnterStubFrame();
|
|
__ CallRuntime(kSingleStepHandlerRuntimeEntry, 0);
|
|
__ LeaveStubFrame();
|
|
__ Bind(¬_stepping);
|
|
}
|
|
|
|
const Register left = RAX;
|
|
const Register right = RDX;
|
|
|
|
__ movq(left, Address(RSP, 2 * kWordSize));
|
|
__ movq(right, Address(RSP, 1 * kWordSize));
|
|
GenerateIdenticalWithNumberCheckStub(assembler, left, right);
|
|
__ ret();
|
|
}
|
|
|
|
|
|
// Called from optimized code only.
|
|
// TOS + 0: return address
|
|
// TOS + 1: right argument.
|
|
// TOS + 2: left argument.
|
|
// Returns ZF set.
|
|
void StubCode::GenerateOptimizedIdenticalWithNumberCheckStub(
|
|
Assembler* assembler) {
|
|
const Register left = RAX;
|
|
const Register right = RDX;
|
|
|
|
__ movq(left, Address(RSP, 2 * kWordSize));
|
|
__ movq(right, Address(RSP, 1 * kWordSize));
|
|
GenerateIdenticalWithNumberCheckStub(assembler, left, right);
|
|
__ ret();
|
|
}
|
|
|
|
} // namespace dart
|
|
|
|
#endif // defined TARGET_ARCH_X64
|