zerny@google.com
aa5281c88a
This reapplies r12488 with a fix. R=kmillikin@google.com,fschneider@google.com Review URL: https://codereview.chromium.org//10952002 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@12499 260f80e4-7a28-3924-810f-c04153c831b5
1935 lines
71 KiB
C++
1935 lines
71 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/assembler.h"
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#include "vm/assembler_macros.h"
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#include "vm/compiler.h"
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#include "vm/flow_graph_compiler.h"
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#include "vm/instructions.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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DECLARE_FLAG(int, optimization_counter_threshold);
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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_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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// Print the stop message.
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DEFINE_LEAF_RUNTIME_ENTRY(void, PrintStopMessage, 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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__ CallRuntime(kPrintStopMessageRuntimeEntry);
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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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// 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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AssemblerMacros::EnterStubFrame(assembler);
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__ pushq(R10); // Preserve arguments descriptor array.
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__ pushq(RBX);
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__ CallRuntime(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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AssemblerMacros::EnterStubFrame(assembler);
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__ pushq(R10); // Preserve arguments descriptor array.
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__ pushq(RBX); // Preserve function object.
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__ CallRuntime(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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AssemblerMacros::EnterStubFrame(assembler);
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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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__ CallRuntime(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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// 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::GenerateInstanceFunctionLookupStub(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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// 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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AssemblerMacros::EnterStubFrame(assembler);
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// Preserve values across call to resolving.
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// Stack at this point:
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// TOS + 0: PC marker => RawInstruction object.
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// TOS + 1: Saved RBP of previous frame. <== RBP
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// TOS + 2: Dart code return address
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// TOS + 3: 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()));
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__ movq(RAX, Address(RBP, RAX, TIMES_4, kWordSize)); // Get receiver.
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__ pushq(R10); // Preserve arguments descriptor array.
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__ pushq(RAX); // Preserve receiver.
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__ pushq(RBX); // Preserve ic-data.
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// First resolve the function to get the function object.
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__ pushq(raw_null); // Setup space on stack for return value.
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__ pushq(RAX); // Push receiver.
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__ CallRuntime(kResolveCompileInstanceFunctionRuntimeEntry);
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__ popq(RAX); // Remove receiver pushed earlier.
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__ popq(RBX); // Pop returned code object into RBX.
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// Pop preserved values
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__ popq(R10); // Restore ic-data.
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__ popq(RAX); // Restore receiver.
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__ popq(R13); // Restore arguments descriptor array.
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__ cmpq(RBX, raw_null);
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Label check_implicit_closure;
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__ j(EQUAL, &check_implicit_closure, Assembler::kNearJump);
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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(R10, R13);
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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(&check_implicit_closure);
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// RAX: receiver.
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// R10: ic-data.
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// RBX: raw_null.
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// R13: arguments descriptor array.
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// The target function was not found.
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// First check to see if this is a getter function and we are
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// trying to create a closure of an instance function.
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// Push values that need to be preserved across runtime call.
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__ pushq(RAX); // Preserve receiver.
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__ pushq(R10); // Preserve ic-data.
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__ pushq(R13); // Preserve arguments descriptor array.
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__ pushq(raw_null); // Setup space on stack for return value.
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__ pushq(RAX); // Push receiver.
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__ pushq(R10); // Ic-data array.
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__ CallRuntime(kResolveImplicitClosureFunctionRuntimeEntry);
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__ popq(RAX);
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__ popq(RAX);
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__ popq(RBX); // Get return value into RBX, might be Closure object.
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// Pop preserved values.
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__ popq(R13); // Restore arguments descriptor array.
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__ popq(R10); // Restore ic-data.
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__ popq(RAX); // Restore receiver.
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__ cmpq(RBX, raw_null);
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Label check_implicit_closure_through_getter;
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__ j(EQUAL, &check_implicit_closure_through_getter, Assembler::kNearJump);
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__ movq(RAX, RBX); // Return value is the closure object.
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// Remove the stub frame as we are about return.
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__ LeaveFrame();
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__ ret();
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__ Bind(&check_implicit_closure_through_getter);
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// RAX: receiver.
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// R10: ic-data.
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// RBX: raw_null.
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// R13: arguments descriptor array.
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// This is not the case of an instance so invoke the getter of the
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// same name and see if we get a closure back which we are then
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// supposed to invoke.
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// Push values that need to be preserved across runtime call.
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__ pushq(RAX); // Preserve receiver.
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__ pushq(R10); // Preserve ic-data.
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__ pushq(R13); // Preserve arguments descriptor array.
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__ pushq(raw_null); // Setup space on stack for return value.
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__ pushq(RAX); // Push receiver.
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__ pushq(R10); // Ic-data array.
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__ CallRuntime(kResolveImplicitClosureThroughGetterRuntimeEntry);
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__ popq(R10); // Pop argument.
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__ popq(RAX); // Pop argument.
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__ popq(RBX); // get return value into RBX, might be Closure object.
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// Pop preserved values.
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__ popq(R13); // Restore arguments descriptor array.
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__ popq(R10); // Restore ic-data.
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__ popq(RAX); // Restore receiver.
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__ cmpq(RBX, raw_null);
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Label function_not_found;
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__ j(EQUAL, &function_not_found);
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// RBX: Closure object.
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// R13: Arguments descriptor array.
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__ pushq(raw_null); // Setup space on stack for result from invoking Closure.
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__ pushq(RBX); // Closure object.
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__ pushq(R13); // Arguments descriptor.
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__ movq(R13, FieldAddress(R13, Array::data_offset()));
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__ SmiUntag(R13);
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__ subq(R13, Immediate(1)); // Arguments array length, minus the receiver.
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PushArgumentsArray(assembler, (kWordSize * 6));
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// Stack layout explaining "(kWordSize * 6)" offset.
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// TOS + 0: Argument array.
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// TOS + 1: Arguments descriptor array.
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// TOS + 2: Closure object.
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// TOS + 3: Place for result from closure function.
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// TOS + 4: PC marker => RawInstruction object.
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// TOS + 5: Saved RBP of previous frame. <== RBP
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// TOS + 6: Dart code return address
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// TOS + 7: Last argument of caller.
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// ....
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__ CallRuntime(kInvokeImplicitClosureFunctionRuntimeEntry);
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// Remove arguments.
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__ popq(RAX);
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__ popq(RAX);
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__ popq(RAX);
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__ popq(RAX); // Get result into RAX.
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// Remove the stub frame as we are about to return.
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__ LeaveFrame();
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__ ret();
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__ Bind(&function_not_found);
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// The target function was not found, so invoke method
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// "void noSuchMethod(function_name, args_array)".
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// RAX: receiver.
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// R10: ic-data.
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// RBX: raw_null.
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// R13: argument descriptor array.
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__ pushq(raw_null); // Setup space on stack for result from noSuchMethod.
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__ pushq(RAX); // Receiver.
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__ pushq(R10); // IC-data array.
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__ pushq(R13); // Argument descriptor array.
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__ movq(R13, FieldAddress(R13, Array::data_offset()));
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__ SmiUntag(R13);
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__ subq(R13, Immediate(1)); // Arguments array length, minus the receiver.
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// See stack layout below explaining "wordSize * 7" offset.
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PushArgumentsArray(assembler, (kWordSize * 7));
|
|
|
|
// 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: PC marker => RawInstruction object.
|
|
// TOS + 6: Saved RBP of previous frame. <== RBP
|
|
// TOS + 7: Dart code return address
|
|
// TOS + 8: Last argument of caller.
|
|
// ....
|
|
|
|
__ CallRuntime(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();
|
|
}
|
|
|
|
|
|
DECLARE_LEAF_RUNTIME_ENTRY(intptr_t, DeoptimizeCopyFrame,
|
|
intptr_t deopt_reason,
|
|
uword saved_registers_address);
|
|
|
|
DECLARE_LEAF_RUNTIME_ENTRY(void, DeoptimizeFillFrame, uword last_fp);
|
|
|
|
|
|
// This stub translates optimized frame into unoptimized frame. The optimized
|
|
// frame can contain values in registers and on stack, the unoptimized
|
|
// frame contains all values on stack.
|
|
// Deoptimization occurs in following steps:
|
|
// - Push all registers that can contain values.
|
|
// - Call C routine to copy the stack and saved registers into temporary buffer.
|
|
// - Adjust caller's frame to correct unoptimized frame size.
|
|
// - Fill the unoptimized frame.
|
|
// - Materialize objects that require allocation (e.g. Double instances).
|
|
// GC can occur only after frame is fully rewritten.
|
|
// Stack:
|
|
// +------------------+
|
|
// | Saved FP |
|
|
// +------------------+
|
|
// | return-address | (deoptimization point)
|
|
// +------------------+
|
|
// | optimized frame |
|
|
// | ... |
|
|
//
|
|
// Parts of the code cannot GC, part of the code can GC.
|
|
static void GenerateDeoptimizationSequence(Assembler* assembler,
|
|
bool preserve_rax) {
|
|
__ EnterFrame(0);
|
|
// The code in this frame may not cause GC. kDeoptimizeCopyFrameRuntimeEntry
|
|
// and kDeoptimizeFillFrameRuntimeEntry are leaf runtime calls.
|
|
const intptr_t saved_rax_offset_from_ebp = -(kNumberOfCpuRegisters - RAX);
|
|
// Result in EAX is preserved as part of pushing all registers below.
|
|
|
|
// Push registers in their enumeration order: lowest register number at
|
|
// lowest address.
|
|
for (intptr_t i = kNumberOfCpuRegisters - 1; i >= 0; i--) {
|
|
__ pushq(static_cast<Register>(i));
|
|
}
|
|
__ subq(RSP, Immediate(kNumberOfXmmRegisters * kDoubleSize));
|
|
intptr_t offset = 0;
|
|
for (intptr_t reg_idx = 0; reg_idx < kNumberOfXmmRegisters; ++reg_idx) {
|
|
XmmRegister xmm_reg = static_cast<XmmRegister>(reg_idx);
|
|
__ movsd(Address(RSP, offset), xmm_reg);
|
|
offset += kDoubleSize;
|
|
}
|
|
|
|
__ movq(RCX, RSP); // Saved saved registers block.
|
|
__ ReserveAlignedFrameSpace(0);
|
|
__ SmiUntag(RAX);
|
|
__ movq(RDI, RCX); // Set up argument 1 saved_registers_address.
|
|
|
|
__ CallRuntime(kDeoptimizeCopyFrameRuntimeEntry);
|
|
// Result (RAX) is stack-size (FP - SP) in bytes, incl. the return address.
|
|
|
|
if (preserve_rax) {
|
|
// Restore result into RBX temporarily.
|
|
__ movq(RBX, Address(RBP, saved_rax_offset_from_ebp * kWordSize));
|
|
}
|
|
|
|
__ LeaveFrame();
|
|
__ popq(RCX); // Preserve return address.
|
|
__ movq(RSP, RBP);
|
|
__ subq(RSP, RAX);
|
|
__ movq(Address(RSP, 0), RCX);
|
|
|
|
__ EnterFrame(0);
|
|
__ movq(RCX, RSP); // Get last FP address.
|
|
if (preserve_rax) {
|
|
__ pushq(RBX); // Preserve result.
|
|
}
|
|
__ ReserveAlignedFrameSpace(0);
|
|
__ movq(RDI, RCX); // Set up argument 1 last_fp.
|
|
__ CallRuntime(kDeoptimizeFillFrameRuntimeEntry);
|
|
// Result (RAX) is our FP.
|
|
if (preserve_rax) {
|
|
// Restore result into RBX.
|
|
__ movq(RBX, Address(RBP, -1 * kWordSize));
|
|
}
|
|
// Code above cannot cause GC.
|
|
__ LeaveFrame();
|
|
__ movq(RBP, RAX);
|
|
|
|
// 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.
|
|
__ EnterFrame(0);
|
|
if (preserve_rax) {
|
|
__ pushq(RBX); // Preserve result, it will be GC-d here.
|
|
}
|
|
__ CallRuntime(kDeoptimizeMaterializeDoublesRuntimeEntry);
|
|
if (preserve_rax) {
|
|
__ popq(RAX); // Restore result.
|
|
}
|
|
__ LeaveFrame();
|
|
|
|
__ 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.
|
|
}
|
|
|
|
|
|
// 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 is 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.
|
|
__ StoreIntoObjectNoBarrier(
|
|
RAX, FieldAddress(RAX, Array::type_arguments_offset()), RBX);
|
|
|
|
// Set the length field.
|
|
__ StoreIntoObjectNoBarrier(
|
|
RAX, FieldAddress(RAX, Array::length_offset()), R10);
|
|
|
|
// 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));
|
|
__ jmp(&done);
|
|
|
|
__ Bind(&size_tag_overflow);
|
|
__ movq(RBX, Immediate(0));
|
|
__ Bind(&done);
|
|
|
|
// Get the class index and insert it into the tags.
|
|
__ orq(RBX, Immediate(RawObject::ClassIdTag::encode(kArrayCid)));
|
|
__ movq(FieldAddress(RAX, Array::tags_offset()), RBX);
|
|
}
|
|
|
|
// 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);
|
|
AssemblerMacros::EnterStubFrame(assembler);
|
|
__ pushq(raw_null); // Setup space on stack for return value.
|
|
__ pushq(R10); // Array length as Smi.
|
|
__ pushq(RBX); // Element type.
|
|
__ CallRuntime(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);
|
|
__ testq(R13, Immediate(kSmiTagMask));
|
|
__ j(ZERO, ¬_closure); // 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.
|
|
__ LoadClass(RAX, R13);
|
|
__ 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.
|
|
AssemblerMacros::EnterStubFrame(assembler);
|
|
|
|
__ pushq(R10); // Preserve arguments descriptor array.
|
|
__ pushq(RBX); // Preserve read-only function object argument.
|
|
__ CallRuntime(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.
|
|
AssemblerMacros::EnterStubFrame(assembler);
|
|
|
|
__ 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 * 5" offset.
|
|
PushArgumentsArray(assembler, (kWordSize * 5));
|
|
|
|
// Stack:
|
|
// TOS + 0: Argument array.
|
|
// TOS + 1: Non-closure object.
|
|
// TOS + 2: Place for result from reporting the error.
|
|
// TOS + 3: PC marker => RawInstruction object.
|
|
// TOS + 4: Saved RBP of previous frame. <== RBP
|
|
// TOS + 5: Dart code return address
|
|
// TOS + 6: Last argument of caller.
|
|
// ....
|
|
__ CallRuntime(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));
|
|
|
|
// 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));
|
|
__ 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);
|
|
|
|
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.
|
|
AssemblerMacros::EnterStubFrame(assembler);
|
|
__ pushq(raw_null); // Setup space on stack for the return value.
|
|
__ SmiTag(R10);
|
|
__ pushq(R10); // Push number of context variables.
|
|
__ CallRuntime(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();
|
|
}
|
|
|
|
|
|
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);
|
|
|
|
// Load the isolate out of the context.
|
|
// RAX: Address being stored
|
|
__ movq(RDX, FieldAddress(CTX, Context::isolate_offset()));
|
|
|
|
// Load top_ out of the StoreBufferBlock and add the address to the pointers_.
|
|
// RAX: Address being stored
|
|
// RDX: Isolate
|
|
intptr_t store_buffer_offset = Isolate::store_buffer_block_offset();
|
|
__ movl(RCX,
|
|
Address(RDX, store_buffer_offset + StoreBufferBlock::top_offset()));
|
|
__ movq(Address(RDX,
|
|
RCX, TIMES_8,
|
|
store_buffer_offset + StoreBufferBlock::pointers_offset()),
|
|
RAX);
|
|
|
|
// Increment top_ and check for overflow.
|
|
// RCX: top_
|
|
// RDX: Isolate
|
|
Label L;
|
|
__ incq(RCX);
|
|
__ movl(Address(RDX, store_buffer_offset + 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(RDI, FieldAddress(CTX, Context::isolate_offset()));
|
|
__ CallRuntime(kStoreBufferBlockProcessRuntimeEntry);
|
|
__ LeaveCallRuntimeFrame();
|
|
__ 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);
|
|
const Class& ita_cls =
|
|
Class::ZoneHandle(Object::instantiated_type_arguments_class());
|
|
// Set the tags.
|
|
uword tags = 0;
|
|
tags = RawObject::SizeTag::update(type_args_size, tags);
|
|
tags = RawObject::ClassIdTag::update(ita_cls.id(), tags);
|
|
__ movq(Address(RCX, Instance::tags_offset()), Immediate(tags));
|
|
// 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.
|
|
}
|
|
|
|
// 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.
|
|
// 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.
|
|
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.
|
|
AssemblerMacros::EnterStubFrame(assembler);
|
|
__ 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)));
|
|
}
|
|
__ CallRuntime(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:
|
|
// RSP + 16 : receiver (null if not an implicit instance closure).
|
|
// RSP + 8 : type arguments object (null if class is not 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 = 2 * 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);
|
|
|
|
// RAX: new closure object.
|
|
// RBX: new context object (only if is_implicit_closure).
|
|
// Set the tags.
|
|
uword tags = 0;
|
|
tags = RawObject::SizeTag::update(closure_size, tags);
|
|
tags = RawObject::ClassIdTag::update(cls.id(), tags);
|
|
__ movq(Address(RAX, Closure::tags_offset()), Immediate(tags));
|
|
|
|
// 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.
|
|
|
|
const Class& context_class = Class::ZoneHandle(Object::context_class());
|
|
// Set the tags.
|
|
uword tags = 0;
|
|
tags = RawObject::SizeTag::update(context_size, tags);
|
|
tags = RawObject::ClassIdTag::update(context_class.id(), tags);
|
|
__ movq(Address(RBX, Context::tags_offset()), Immediate(tags));
|
|
|
|
// 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.
|
|
__ movq(R10, Address(RSP, kTypeArgumentsOffset));
|
|
__ movq(Address(RAX, Closure::type_arguments_offset()), R10);
|
|
|
|
__ 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.
|
|
AssemblerMacros::EnterStubFrame(assembler);
|
|
__ pushq(raw_null); // Setup space on stack for the return value.
|
|
__ PushObject(func);
|
|
if (is_implicit_static_closure) {
|
|
__ CallRuntime(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) {
|
|
__ CallRuntime(kAllocateImplicitInstanceClosureRuntimeEntry);
|
|
__ popq(RAX); // Pop type arguments.
|
|
__ popq(RAX); // Pop receiver.
|
|
} else {
|
|
ASSERT(func.IsNonImplicitClosureFunction());
|
|
__ CallRuntime(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 - 8 : PC marker => RawInstruction object.
|
|
// 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 NoSuchMethodError 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.
|
|
|
|
// Create a stub frame.
|
|
AssemblerMacros::EnterStubFrame(assembler);
|
|
|
|
__ 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 * 10" offset.
|
|
PushArgumentsArray(assembler, (kWordSize * 10));
|
|
|
|
// 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: PC marker => RawInstruction object.
|
|
// TOS + 6: Saved RBP of previous frame. <== RBP
|
|
// TOS + 7: Dart callee (or stub) code return address
|
|
// TOS + 8: PC marker => RawInstruction object of dart caller frame.
|
|
// TOS + 9: Saved RBP of dart caller frame.
|
|
// TOS + 10: Dart caller code return address
|
|
// TOS + 11: Last argument of caller.
|
|
// ....
|
|
__ CallRuntime(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 descriptor 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) {
|
|
__ movq(RCX, FieldAddress(RBX, ICData::function_offset()));
|
|
Label is_hot;
|
|
if (FlowGraphCompiler::CanOptimize()) {
|
|
ASSERT(FLAG_optimization_counter_threshold > 1);
|
|
// The usage_counter is always less than FLAG_optimization_counter_threshold
|
|
// except when the function gets optimized.
|
|
__ cmpq(FieldAddress(RCX, Function::usage_counter_offset()),
|
|
Immediate(FLAG_optimization_counter_threshold - 1));
|
|
// Do not increment to equality with threshold, since a counter greater
|
|
// than threshold denotes a function that was already optimized.
|
|
// The equality should be reached only at exit of the method
|
|
// (return instruction).
|
|
__ j(EQUAL, &is_hot, Assembler::kNearJump);
|
|
// As long as VM has no OSR do not optimize in the middle of the function
|
|
// but only at exit so that we have collected all type feedback before
|
|
// optimizing.
|
|
}
|
|
__ incq(FieldAddress(RCX, Function::usage_counter_offset()));
|
|
__ Bind(&is_hot);
|
|
|
|
ASSERT(num_args > 0);
|
|
// Get receiver (first read number of arguments from argument descriptor array
|
|
// and then access the receiver from the stack).
|
|
__ movq(RAX, FieldAddress(R10, Array::data_offset()));
|
|
__ movq(RAX, Address(RSP, RAX, TIMES_4, 0)); // RAX (argument count) is Smi.
|
|
|
|
Label get_class_id_as_smi, ic_miss;
|
|
// 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.
|
|
// 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) {
|
|
__ call(&get_class_id_as_smi);
|
|
// RAX: receiver's class id as Smi.
|
|
__ Bind(&loop);
|
|
__ movq(R13, Address(R12, 0)); // Get class if (Smi) to check.
|
|
__ cmpq(RAX, R13); // Match?
|
|
__ j(EQUAL, &found, Assembler::kNearJump);
|
|
__ addq(R12, Immediate(kWordSize * 2)); // Next element (class + target).
|
|
__ cmpq(R13, Immediate(Smi::RawValue(kIllegalCid))); // Done?
|
|
__ j(NOT_EQUAL, &loop, Assembler::kNearJump);
|
|
} else {
|
|
Label no_match;
|
|
__ Bind(&loop);
|
|
for (int i = 0; i < num_args; i++) {
|
|
__ movq(RAX, FieldAddress(R10, Array::data_offset()));
|
|
__ movq(RAX, Address(RSP, RAX, TIMES_4, - i * kWordSize));
|
|
__ call(&get_class_id_as_smi);
|
|
__ movq(R13, Address(R12, i * kWordSize));
|
|
__ cmpq(RAX, R13); // Class id match?
|
|
if (i < (num_args - 1)) {
|
|
__ j(NOT_EQUAL, &no_match);
|
|
} else {
|
|
// Last check, all checks before matched.
|
|
__ j(EQUAL, &found);
|
|
}
|
|
}
|
|
__ Bind(&no_match);
|
|
// Each test entry has (1 + num_args) array elements.
|
|
__ addq(R12, Immediate(kWordSize * (1 + num_args))); // Next element.
|
|
__ cmpq(R13, Immediate(Smi::RawValue(kIllegalCid))); // Done?
|
|
__ j(NOT_EQUAL, &loop, Assembler::kNearJump);
|
|
}
|
|
|
|
__ Bind(&ic_miss);
|
|
// Compute address of arguments (first read number of arguments from argument
|
|
// descriptor array and then compute address on the stack).
|
|
__ movq(RAX, FieldAddress(R10, Array::data_offset()));
|
|
__ leaq(RAX, Address(RSP, RAX, TIMES_4, 0)); // RAX is Smi.
|
|
AssemblerMacros::EnterStubFrame(assembler);
|
|
__ pushq(R10); // Preserve arguments array.
|
|
__ pushq(RBX); // Preserve IC data array
|
|
__ pushq(raw_null); // Setup space on stack for result (target code object).
|
|
// Push call arguments.
|
|
for (intptr_t i = 0; i < num_args; i++) {
|
|
__ movq(R10, Address(RAX, -kWordSize * i));
|
|
__ pushq(R10);
|
|
}
|
|
if (num_args == 1) {
|
|
__ CallRuntime(kInlineCacheMissHandlerOneArgRuntimeEntry);
|
|
} else if (num_args == 2) {
|
|
__ CallRuntime(kInlineCacheMissHandlerTwoArgsRuntimeEntry);
|
|
} else if (num_args == 3) {
|
|
__ CallRuntime(kInlineCacheMissHandlerThreeArgsRuntimeEntry);
|
|
} 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::InstanceFunctionLookupLabel());
|
|
|
|
__ 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_id_as_smi);
|
|
Label not_smi;
|
|
// Test if Smi -> load Smi class for comparison.
|
|
__ testq(RAX, Immediate(kSmiTagMask));
|
|
__ j(NOT_ZERO, ¬_smi, Assembler::kNearJump);
|
|
__ movq(RAX, Immediate(Smi::RawValue(kSmiCid)));
|
|
__ ret();
|
|
|
|
__ Bind(¬_smi);
|
|
__ LoadClassId(RAX, RAX);
|
|
__ SmiTag(RAX);
|
|
__ 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);
|
|
}
|
|
|
|
|
|
void StubCode::GenerateThreeArgsCheckInlineCacheStub(Assembler* assembler) {
|
|
return GenerateNArgsCheckInlineCacheStub(assembler, 3);
|
|
}
|
|
|
|
|
|
// RBX: Function object.
|
|
// R10: Arguments array.
|
|
// TOS(0): return address (Dart code).
|
|
void StubCode::GenerateBreakpointStaticStub(Assembler* assembler) {
|
|
AssemblerMacros::EnterStubFrame(assembler);
|
|
__ pushq(R10);
|
|
__ pushq(RBX);
|
|
__ CallRuntime(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) {
|
|
AssemblerMacros::EnterStubFrame(assembler);
|
|
__ pushq(RAX);
|
|
__ CallRuntime(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) {
|
|
AssemblerMacros::EnterStubFrame(assembler);
|
|
__ pushq(RBX);
|
|
__ pushq(R10);
|
|
__ CallRuntime(kBreakpointDynamicHandlerRuntimeEntry);
|
|
__ popq(R10);
|
|
__ popq(RBX);
|
|
__ LeaveFrame();
|
|
|
|
// Find out which dispatch stub to call.
|
|
Label test_two, test_three, test_four;
|
|
__ movq(RCX, FieldAddress(RBX, ICData::num_args_tested_offset()));
|
|
__ cmpq(RCX, Immediate(1));
|
|
__ j(NOT_EQUAL, &test_two, Assembler::kNearJump);
|
|
__ jmp(&StubCode::OneArgCheckInlineCacheLabel());
|
|
__ Bind(&test_two);
|
|
__ cmpl(RCX, Immediate(2));
|
|
__ j(NOT_EQUAL, &test_three, Assembler::kNearJump);
|
|
__ jmp(&StubCode::TwoArgsCheckInlineCacheLabel());
|
|
__ Bind(&test_three);
|
|
__ cmpl(RCX, Immediate(3));
|
|
__ j(NOT_EQUAL, &test_four, Assembler::kNearJump);
|
|
__ jmp(&StubCode::ThreeArgsCheckInlineCacheLabel());
|
|
__ Bind(&test_four);
|
|
__ Stop("Unsupported number of arguments tested.");
|
|
}
|
|
|
|
|
|
// 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 Immediate raw_null =
|
|
Immediate(reinterpret_cast<intptr_t>(Object::null()));
|
|
const intptr_t kInstantiatorTypeArgumentsInBytes = 1 * kWordSize;
|
|
const intptr_t kInstanceOffsetInBytes = 2 * kWordSize;
|
|
const intptr_t kCacheOffsetInBytes = 3 * kWordSize;
|
|
__ movq(RAX, Address(RSP, kInstanceOffsetInBytes));
|
|
if (n > 1) {
|
|
__ LoadClass(R10, RAX);
|
|
// Compute instance type arguments into R13.
|
|
Label has_no_type_arguments;
|
|
__ movq(R13, raw_null);
|
|
__ movq(RDI, FieldAddress(R10,
|
|
Class::type_arguments_instance_field_offset_offset()));
|
|
__ cmpq(RDI, Immediate(Class::kNoTypeArguments));
|
|
__ j(EQUAL, &has_no_type_arguments, Assembler::kNearJump);
|
|
__ movq(R13, FieldAddress(RAX, RDI, TIMES_1, 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, raw_null);
|
|
__ 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, raw_null);
|
|
__ 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 handler.
|
|
// TOS + 0: return address
|
|
// RDI: program counter
|
|
// RSI: stack pointer
|
|
// RDX: frame_pointer
|
|
// RCX: exception object
|
|
// R8: stacktrace object
|
|
// No Result.
|
|
void StubCode::GenerateJumpToExceptionHandlerStub(Assembler* assembler) {
|
|
ASSERT(kExceptionObjectReg == RAX);
|
|
ASSERT(kStackTraceObjectReg == RDX);
|
|
__ movq(RBP, RDX); // target frame pointer.
|
|
__ movq(kStackTraceObjectReg, R8); // stacktrace object.
|
|
__ movq(kExceptionObjectReg, RCX); // exception object.
|
|
__ movq(RSP, RSI); // target stack_pointer.
|
|
__ jmp(RDI); // Jump to the exception handler code.
|
|
}
|
|
|
|
|
|
// Jump to the error handler.
|
|
// TOS + 0: return address
|
|
// RDI: program_counter
|
|
// RSI: stack_pointer
|
|
// RDX: frame_pointer
|
|
// RCX: error object
|
|
// No Result.
|
|
void StubCode::GenerateJumpToErrorHandlerStub(Assembler* assembler) {
|
|
__ movq(RAX, RCX); // error object.
|
|
__ movq(RBP, RDX); // target frame_pointer.
|
|
__ movq(RSP, RSI); // target stack_pointer.
|
|
__ jmp(RDI); // Jump to the exception handler code.
|
|
}
|
|
|
|
} // namespace dart
|
|
|
|
#endif // defined TARGET_ARCH_X64
|