mirror of
https://github.com/dart-lang/sdk
synced 2024-11-02 12:24:24 +00:00
89ce54fe0e
We've been getting away with skipping this slot because - ObjectPools are allocated into old space and never move, and - the ObjectPools are also reachable from the PC marker in the caller's frame. However, ObjectPools will become movable during compacting GCs. Bug: https://github.com/dart-lang/sdk/issues/30978 Change-Id: Ied3a1588365fe5362ad7f1d2d446a7a59df6ced6 Reviewed-on: https://dart-review.googlesource.com/10680 Reviewed-by: Siva Annamalai <asiva@google.com> Commit-Queue: Ryan Macnak <rmacnak@google.com>
2079 lines
76 KiB
C++
2079 lines
76 KiB
C++
// Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file
|
|
// for details. All rights reserved. Use of this source code is governed by a
|
|
// BSD-style license that can be found in the LICENSE file.
|
|
|
|
#include "vm/globals.h"
|
|
#if defined(TARGET_ARCH_IA32) && !defined(DART_PRECOMPILED_RUNTIME)
|
|
|
|
#include "vm/compiler/assembler/assembler.h"
|
|
#include "vm/compiler/backend/flow_graph_compiler.h"
|
|
#include "vm/compiler/jit/compiler.h"
|
|
#include "vm/dart_entry.h"
|
|
#include "vm/heap.h"
|
|
#include "vm/instructions.h"
|
|
#include "vm/object_store.h"
|
|
#include "vm/resolver.h"
|
|
#include "vm/scavenger.h"
|
|
#include "vm/stack_frame.h"
|
|
#include "vm/stub_code.h"
|
|
#include "vm/tags.h"
|
|
|
|
#define __ assembler->
|
|
|
|
namespace dart {
|
|
|
|
DEFINE_FLAG(bool, inline_alloc, true, "Inline allocation of objects.");
|
|
DEFINE_FLAG(bool,
|
|
use_slow_path,
|
|
false,
|
|
"Set to true for debugging & verifying the slow paths.");
|
|
DECLARE_FLAG(bool, trace_optimized_ic_calls);
|
|
|
|
#define INT32_SIZEOF(x) static_cast<int32_t>(sizeof(x))
|
|
|
|
// Input parameters:
|
|
// ESP : points to return address.
|
|
// ESP + 4 : address of last argument in argument array.
|
|
// ESP + 4*EDX : address of first argument in argument array.
|
|
// ESP + 4*EDX + 4 : address of return value.
|
|
// ECX : address of the runtime function to call.
|
|
// EDX : number of arguments to the call.
|
|
// Must preserve callee saved registers EDI and EBX.
|
|
void StubCode::GenerateCallToRuntimeStub(Assembler* assembler) {
|
|
const intptr_t thread_offset = NativeArguments::thread_offset();
|
|
const intptr_t argc_tag_offset = NativeArguments::argc_tag_offset();
|
|
const intptr_t argv_offset = NativeArguments::argv_offset();
|
|
const intptr_t retval_offset = NativeArguments::retval_offset();
|
|
|
|
__ EnterStubFrame();
|
|
|
|
// Save exit frame information to enable stack walking as we are about
|
|
// to transition to Dart VM C++ code.
|
|
__ movl(Address(THR, Thread::top_exit_frame_info_offset()), EBP);
|
|
|
|
#if defined(DEBUG)
|
|
{
|
|
Label ok;
|
|
// Check that we are always entering from Dart code.
|
|
__ cmpl(Assembler::VMTagAddress(), Immediate(VMTag::kDartTagId));
|
|
__ j(EQUAL, &ok, Assembler::kNearJump);
|
|
__ Stop("Not coming from Dart code.");
|
|
__ Bind(&ok);
|
|
}
|
|
#endif
|
|
|
|
// Mark that the thread is executing VM code.
|
|
__ movl(Assembler::VMTagAddress(), ECX);
|
|
|
|
// Reserve space for arguments and align frame before entering C++ world.
|
|
__ AddImmediate(ESP, Immediate(-INT32_SIZEOF(NativeArguments)));
|
|
if (OS::ActivationFrameAlignment() > 1) {
|
|
__ andl(ESP, Immediate(~(OS::ActivationFrameAlignment() - 1)));
|
|
}
|
|
|
|
// Pass NativeArguments structure by value and call runtime.
|
|
__ movl(Address(ESP, thread_offset), THR); // Set thread in NativeArgs.
|
|
// There are no runtime calls to closures, so we do not need to set the tag
|
|
// bits kClosureFunctionBit and kInstanceFunctionBit in argc_tag_.
|
|
__ movl(Address(ESP, argc_tag_offset), EDX); // Set argc in NativeArguments.
|
|
// Compute argv.
|
|
__ leal(EAX, Address(EBP, EDX, TIMES_4, kParamEndSlotFromFp * kWordSize));
|
|
__ movl(Address(ESP, argv_offset), EAX); // Set argv in NativeArguments.
|
|
__ addl(EAX, Immediate(1 * kWordSize)); // Retval is next to 1st argument.
|
|
__ movl(Address(ESP, retval_offset), EAX); // Set retval in NativeArguments.
|
|
__ call(ECX);
|
|
|
|
__ movl(Assembler::VMTagAddress(), Immediate(VMTag::kDartTagId));
|
|
|
|
// Reset exit frame information in Isolate structure.
|
|
__ movl(Address(THR, Thread::top_exit_frame_info_offset()), Immediate(0));
|
|
|
|
__ LeaveFrame();
|
|
__ ret();
|
|
}
|
|
|
|
// Input parameters:
|
|
// ESP : points to return address.
|
|
// EAX : stop message (const char*).
|
|
// Must preserve all registers, except EAX.
|
|
void StubCode::GeneratePrintStopMessageStub(Assembler* assembler) {
|
|
__ EnterCallRuntimeFrame(1 * kWordSize);
|
|
__ movl(Address(ESP, 0), EAX);
|
|
__ CallRuntime(kPrintStopMessageRuntimeEntry, 1);
|
|
__ LeaveCallRuntimeFrame();
|
|
__ ret();
|
|
}
|
|
|
|
// Input parameters:
|
|
// ESP : points to return address.
|
|
// ESP + 4 : address of return value.
|
|
// EAX : address of first argument in argument array.
|
|
// ECX : address of the native function to call.
|
|
// EDX : argc_tag including number of arguments and function kind.
|
|
static void GenerateCallNativeWithWrapperStub(Assembler* assembler,
|
|
ExternalLabel* wrapper) {
|
|
const intptr_t native_args_struct_offset =
|
|
NativeEntry::kNumCallWrapperArguments * kWordSize;
|
|
const intptr_t thread_offset =
|
|
NativeArguments::thread_offset() + native_args_struct_offset;
|
|
const intptr_t argc_tag_offset =
|
|
NativeArguments::argc_tag_offset() + native_args_struct_offset;
|
|
const intptr_t argv_offset =
|
|
NativeArguments::argv_offset() + native_args_struct_offset;
|
|
const intptr_t retval_offset =
|
|
NativeArguments::retval_offset() + native_args_struct_offset;
|
|
|
|
__ EnterStubFrame();
|
|
|
|
// Save exit frame information to enable stack walking as we are about
|
|
// to transition to dart VM code.
|
|
__ movl(Address(THR, Thread::top_exit_frame_info_offset()), EBP);
|
|
|
|
#if defined(DEBUG)
|
|
{
|
|
Label ok;
|
|
// Check that we are always entering from Dart code.
|
|
__ cmpl(Assembler::VMTagAddress(), Immediate(VMTag::kDartTagId));
|
|
__ j(EQUAL, &ok, Assembler::kNearJump);
|
|
__ Stop("Not coming from Dart code.");
|
|
__ Bind(&ok);
|
|
}
|
|
#endif
|
|
|
|
// Mark that the thread is executing native code.
|
|
__ movl(Assembler::VMTagAddress(), ECX);
|
|
|
|
// Reserve space for the native arguments structure, the outgoing parameters
|
|
// (pointer to the native arguments structure, the C function entry point)
|
|
// and align frame before entering the C++ world.
|
|
__ AddImmediate(ESP,
|
|
Immediate(-INT32_SIZEOF(NativeArguments) - (2 * kWordSize)));
|
|
if (OS::ActivationFrameAlignment() > 1) {
|
|
__ andl(ESP, Immediate(~(OS::ActivationFrameAlignment() - 1)));
|
|
}
|
|
|
|
// Pass NativeArguments structure by value and call native function.
|
|
__ movl(Address(ESP, thread_offset), THR); // Set thread in NativeArgs.
|
|
__ movl(Address(ESP, argc_tag_offset), EDX); // Set argc in NativeArguments.
|
|
__ movl(Address(ESP, argv_offset), EAX); // Set argv in NativeArguments.
|
|
__ leal(EAX, Address(EBP, 2 * kWordSize)); // Compute return value addr.
|
|
__ movl(Address(ESP, retval_offset), EAX); // Set retval in NativeArguments.
|
|
__ leal(EAX, Address(ESP, 2 * kWordSize)); // Pointer to the NativeArguments.
|
|
__ movl(Address(ESP, 0), EAX); // Pass the pointer to the NativeArguments.
|
|
|
|
__ movl(Address(ESP, kWordSize), ECX); // Function to call.
|
|
__ call(wrapper);
|
|
|
|
__ movl(Assembler::VMTagAddress(), Immediate(VMTag::kDartTagId));
|
|
|
|
// Reset exit frame information in Isolate structure.
|
|
__ movl(Address(THR, Thread::top_exit_frame_info_offset()), Immediate(0));
|
|
|
|
__ LeaveFrame();
|
|
__ ret();
|
|
}
|
|
|
|
void StubCode::GenerateCallNoScopeNativeStub(Assembler* assembler) {
|
|
ExternalLabel wrapper(NativeEntry::NoScopeNativeCallWrapperEntry());
|
|
GenerateCallNativeWithWrapperStub(assembler, &wrapper);
|
|
}
|
|
|
|
void StubCode::GenerateCallAutoScopeNativeStub(Assembler* assembler) {
|
|
ExternalLabel wrapper(NativeEntry::AutoScopeNativeCallWrapperEntry());
|
|
GenerateCallNativeWithWrapperStub(assembler, &wrapper);
|
|
}
|
|
|
|
// Input parameters:
|
|
// ESP : points to return address.
|
|
// ESP + 4 : address of return value.
|
|
// EAX : address of first argument in argument array.
|
|
// ECX : address of the native function to call.
|
|
// EDX : argc_tag including number of arguments and function kind.
|
|
void StubCode::GenerateCallBootstrapNativeStub(Assembler* assembler) {
|
|
const intptr_t native_args_struct_offset = kWordSize;
|
|
const intptr_t thread_offset =
|
|
NativeArguments::thread_offset() + native_args_struct_offset;
|
|
const intptr_t argc_tag_offset =
|
|
NativeArguments::argc_tag_offset() + native_args_struct_offset;
|
|
const intptr_t argv_offset =
|
|
NativeArguments::argv_offset() + native_args_struct_offset;
|
|
const intptr_t retval_offset =
|
|
NativeArguments::retval_offset() + native_args_struct_offset;
|
|
|
|
__ EnterStubFrame();
|
|
|
|
// Save exit frame information to enable stack walking as we are about
|
|
// to transition to dart VM code.
|
|
__ movl(Address(THR, Thread::top_exit_frame_info_offset()), EBP);
|
|
|
|
#if defined(DEBUG)
|
|
{
|
|
Label ok;
|
|
// Check that we are always entering from Dart code.
|
|
__ cmpl(Assembler::VMTagAddress(), Immediate(VMTag::kDartTagId));
|
|
__ j(EQUAL, &ok, Assembler::kNearJump);
|
|
__ Stop("Not coming from Dart code.");
|
|
__ Bind(&ok);
|
|
}
|
|
#endif
|
|
|
|
// Mark that the thread is executing native code.
|
|
__ movl(Assembler::VMTagAddress(), ECX);
|
|
|
|
// Reserve space for the native arguments structure, the outgoing parameter
|
|
// (pointer to the native arguments structure) and align frame before
|
|
// entering the C++ world.
|
|
__ AddImmediate(ESP, Immediate(-INT32_SIZEOF(NativeArguments) - kWordSize));
|
|
if (OS::ActivationFrameAlignment() > 1) {
|
|
__ andl(ESP, Immediate(~(OS::ActivationFrameAlignment() - 1)));
|
|
}
|
|
|
|
// Pass NativeArguments structure by value and call native function.
|
|
__ movl(Address(ESP, thread_offset), THR); // Set thread in NativeArgs.
|
|
__ movl(Address(ESP, argc_tag_offset), EDX); // Set argc in NativeArguments.
|
|
__ movl(Address(ESP, argv_offset), EAX); // Set argv in NativeArguments.
|
|
__ leal(EAX, Address(EBP, 2 * kWordSize)); // Compute return value addr.
|
|
__ movl(Address(ESP, retval_offset), EAX); // Set retval in NativeArguments.
|
|
__ leal(EAX, Address(ESP, kWordSize)); // Pointer to the NativeArguments.
|
|
__ movl(Address(ESP, 0), EAX); // Pass the pointer to the NativeArguments.
|
|
__ call(ECX);
|
|
|
|
__ movl(Assembler::VMTagAddress(), Immediate(VMTag::kDartTagId));
|
|
|
|
// Reset exit frame information in Isolate structure.
|
|
__ movl(Address(THR, Thread::top_exit_frame_info_offset()), Immediate(0));
|
|
|
|
__ LeaveFrame();
|
|
__ ret();
|
|
}
|
|
|
|
// Input parameters:
|
|
// EDX: arguments descriptor array.
|
|
void StubCode::GenerateCallStaticFunctionStub(Assembler* assembler) {
|
|
__ EnterStubFrame();
|
|
__ pushl(EDX); // Preserve arguments descriptor array.
|
|
__ pushl(Immediate(0)); // Setup space on stack for return value.
|
|
__ CallRuntime(kPatchStaticCallRuntimeEntry, 0);
|
|
__ popl(EAX); // Get Code object result.
|
|
__ popl(EDX); // Restore arguments descriptor array.
|
|
// Remove the stub frame as we are about to jump to the dart function.
|
|
__ LeaveFrame();
|
|
|
|
__ movl(ECX, FieldAddress(EAX, Code::entry_point_offset()));
|
|
__ jmp(ECX);
|
|
}
|
|
|
|
// Called from a static call only when an invalid code has been entered
|
|
// (invalid because its function was optimized or deoptimized).
|
|
// EDX: arguments descriptor array.
|
|
void StubCode::GenerateFixCallersTargetStub(Assembler* assembler) {
|
|
// Create a stub frame as we are pushing some objects on the stack before
|
|
// calling into the runtime.
|
|
__ EnterStubFrame();
|
|
__ pushl(EDX); // Preserve arguments descriptor array.
|
|
__ pushl(Immediate(0)); // Setup space on stack for return value.
|
|
__ CallRuntime(kFixCallersTargetRuntimeEntry, 0);
|
|
__ popl(EAX); // Get Code object.
|
|
__ popl(EDX); // Restore arguments descriptor array.
|
|
__ movl(EAX, FieldAddress(EAX, Code::entry_point_offset()));
|
|
__ LeaveFrame();
|
|
__ jmp(EAX);
|
|
__ int3();
|
|
}
|
|
|
|
// Called from object allocate instruction when the allocation stub has been
|
|
// disabled.
|
|
void StubCode::GenerateFixAllocationStubTargetStub(Assembler* assembler) {
|
|
__ EnterStubFrame();
|
|
__ pushl(Immediate(0)); // Setup space on stack for return value.
|
|
__ CallRuntime(kFixAllocationStubTargetRuntimeEntry, 0);
|
|
__ popl(EAX); // Get Code object.
|
|
__ movl(EAX, FieldAddress(EAX, Code::entry_point_offset()));
|
|
__ LeaveFrame();
|
|
__ jmp(EAX);
|
|
__ int3();
|
|
}
|
|
|
|
// Input parameters:
|
|
// EDX: smi-tagged argument count, may be zero.
|
|
// EBP[kParamEndSlotFromFp + 1]: last argument.
|
|
// Uses EAX, EBX, ECX, EDX, EDI.
|
|
static void PushArgumentsArray(Assembler* assembler) {
|
|
// Allocate array to store arguments of caller.
|
|
const Immediate& raw_null =
|
|
Immediate(reinterpret_cast<intptr_t>(Object::null()));
|
|
__ movl(ECX, raw_null); // Null element type for raw Array.
|
|
__ Call(*StubCode::AllocateArray_entry());
|
|
__ SmiUntag(EDX);
|
|
// EAX: newly allocated array.
|
|
// EDX: length of the array (was preserved by the stub).
|
|
__ pushl(EAX); // Array is in EAX and on top of stack.
|
|
__ leal(EBX, Address(EBP, EDX, TIMES_4, kParamEndSlotFromFp * kWordSize));
|
|
__ leal(ECX, FieldAddress(EAX, Array::data_offset()));
|
|
// EBX: address of first argument on stack.
|
|
// ECX: address of first argument in array.
|
|
Label loop, loop_condition;
|
|
__ jmp(&loop_condition, Assembler::kNearJump);
|
|
__ Bind(&loop);
|
|
__ movl(EDI, Address(EBX, 0));
|
|
// Generational barrier is needed, array is not necessarily in new space.
|
|
__ StoreIntoObject(EAX, Address(ECX, 0), EDI);
|
|
__ AddImmediate(ECX, Immediate(kWordSize));
|
|
__ AddImmediate(EBX, Immediate(-kWordSize));
|
|
__ Bind(&loop_condition);
|
|
__ decl(EDX);
|
|
__ j(POSITIVE, &loop, Assembler::kNearJump);
|
|
}
|
|
|
|
// Used by eager and lazy deoptimization. Preserve result in EAX if necessary.
|
|
// 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 after EnterDartFrame(0) below:
|
|
// +------------------+
|
|
// | PC marker | <- TOS
|
|
// +------------------+
|
|
// | Saved FP | <- FP of stub
|
|
// +------------------+
|
|
// | return-address | (deoptimization point)
|
|
// +------------------+
|
|
// | ... | <- SP of optimized frame
|
|
//
|
|
// Parts of the code cannot GC, part of the code can GC.
|
|
static void GenerateDeoptimizationSequence(Assembler* assembler,
|
|
DeoptStubKind kind) {
|
|
// Leaf runtime function DeoptimizeCopyFrame expects a Dart frame.
|
|
__ EnterDartFrame(0);
|
|
// The code in this frame may not cause GC. kDeoptimizeCopyFrameRuntimeEntry
|
|
// and kDeoptimizeFillFrameRuntimeEntry are leaf runtime calls.
|
|
const intptr_t saved_result_slot_from_fp =
|
|
kFirstLocalSlotFromFp + 1 - (kNumberOfCpuRegisters - EAX);
|
|
const intptr_t saved_exception_slot_from_fp =
|
|
kFirstLocalSlotFromFp + 1 - (kNumberOfCpuRegisters - EAX);
|
|
const intptr_t saved_stacktrace_slot_from_fp =
|
|
kFirstLocalSlotFromFp + 1 - (kNumberOfCpuRegisters - EDX);
|
|
// 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--) {
|
|
if (i == CODE_REG) {
|
|
// Save the original value of CODE_REG pushed before invoking this stub
|
|
// instead of the value used to call this stub.
|
|
__ pushl(Address(EBP, 2 * kWordSize));
|
|
} else {
|
|
__ pushl(static_cast<Register>(i));
|
|
}
|
|
}
|
|
__ subl(ESP, Immediate(kNumberOfXmmRegisters * kFpuRegisterSize));
|
|
intptr_t offset = 0;
|
|
for (intptr_t reg_idx = 0; reg_idx < kNumberOfXmmRegisters; ++reg_idx) {
|
|
XmmRegister xmm_reg = static_cast<XmmRegister>(reg_idx);
|
|
__ movups(Address(ESP, offset), xmm_reg);
|
|
offset += kFpuRegisterSize;
|
|
}
|
|
|
|
__ movl(ECX, ESP); // Preserve saved registers block.
|
|
__ ReserveAlignedFrameSpace(2 * kWordSize);
|
|
__ movl(Address(ESP, 0 * kWordSize), ECX); // Start of register block.
|
|
bool is_lazy =
|
|
(kind == kLazyDeoptFromReturn) || (kind == kLazyDeoptFromThrow);
|
|
__ movl(Address(ESP, 1 * kWordSize), Immediate(is_lazy ? 1 : 0));
|
|
__ CallRuntime(kDeoptimizeCopyFrameRuntimeEntry, 2);
|
|
// Result (EAX) is stack-size (FP - SP) in bytes.
|
|
|
|
if (kind == kLazyDeoptFromReturn) {
|
|
// Restore result into EBX temporarily.
|
|
__ movl(EBX, Address(EBP, saved_result_slot_from_fp * kWordSize));
|
|
} else if (kind == kLazyDeoptFromThrow) {
|
|
// Restore result into EBX temporarily.
|
|
__ movl(EBX, Address(EBP, saved_exception_slot_from_fp * kWordSize));
|
|
__ movl(ECX, Address(EBP, saved_stacktrace_slot_from_fp * kWordSize));
|
|
}
|
|
|
|
__ LeaveFrame();
|
|
__ popl(EDX); // Preserve return address.
|
|
__ movl(ESP, EBP); // Discard optimized frame.
|
|
__ subl(ESP, EAX); // Reserve space for deoptimized frame.
|
|
__ pushl(EDX); // Restore return address.
|
|
|
|
// Leaf runtime function DeoptimizeFillFrame expects a Dart frame.
|
|
__ EnterDartFrame(0);
|
|
if (kind == kLazyDeoptFromReturn) {
|
|
__ pushl(EBX); // Preserve result as first local.
|
|
} else if (kind == kLazyDeoptFromThrow) {
|
|
__ pushl(EBX); // Preserve exception as first local.
|
|
__ pushl(ECX); // Preserve stacktrace as first local.
|
|
}
|
|
__ ReserveAlignedFrameSpace(1 * kWordSize);
|
|
__ movl(Address(ESP, 0), EBP); // Pass last FP as parameter on stack.
|
|
__ CallRuntime(kDeoptimizeFillFrameRuntimeEntry, 1);
|
|
if (kind == kLazyDeoptFromReturn) {
|
|
// Restore result into EBX.
|
|
__ movl(EBX, Address(EBP, kFirstLocalSlotFromFp * kWordSize));
|
|
} else if (kind == kLazyDeoptFromThrow) {
|
|
// Restore result into EBX.
|
|
__ movl(EBX, Address(EBP, kFirstLocalSlotFromFp * kWordSize));
|
|
__ movl(ECX, Address(EBP, (kFirstLocalSlotFromFp - 1) * kWordSize));
|
|
}
|
|
// Code above cannot cause GC.
|
|
__ LeaveFrame();
|
|
|
|
// Frame is fully rewritten at this point and it is safe to perform a GC.
|
|
// Materialize any objects that were deferred by FillFrame because they
|
|
// require allocation.
|
|
__ EnterStubFrame();
|
|
if (kind == kLazyDeoptFromReturn) {
|
|
__ pushl(EBX); // Preserve result, it will be GC-d here.
|
|
} else if (kind == kLazyDeoptFromThrow) {
|
|
__ pushl(EBX); // Preserve exception, it will be GC-d here.
|
|
__ pushl(ECX); // Preserve stacktrace, it will be GC-d here.
|
|
}
|
|
__ pushl(Immediate(Smi::RawValue(0))); // Space for the result.
|
|
__ CallRuntime(kDeoptimizeMaterializeRuntimeEntry, 0);
|
|
// Result tells stub how many bytes to remove from the expression stack
|
|
// of the bottom-most frame. They were used as materialization arguments.
|
|
__ popl(EBX);
|
|
__ SmiUntag(EBX);
|
|
if (kind == kLazyDeoptFromReturn) {
|
|
__ popl(EAX); // Restore result.
|
|
} else if (kind == kLazyDeoptFromThrow) {
|
|
__ popl(EDX); // Restore exception.
|
|
__ popl(EAX); // Restore stacktrace.
|
|
}
|
|
__ LeaveFrame();
|
|
|
|
__ popl(ECX); // Pop return address.
|
|
__ addl(ESP, EBX); // Remove materialization arguments.
|
|
__ pushl(ECX); // Push return address.
|
|
// The caller is responsible for emitting the return instruction.
|
|
}
|
|
|
|
// EAX: result, must be preserved
|
|
void StubCode::GenerateDeoptimizeLazyFromReturnStub(Assembler* assembler) {
|
|
// Return address for "call" to deopt stub.
|
|
__ pushl(Immediate(kZapReturnAddress));
|
|
GenerateDeoptimizationSequence(assembler, kLazyDeoptFromReturn);
|
|
__ ret();
|
|
}
|
|
|
|
// EAX: exception, must be preserved
|
|
// EDX: stacktrace, must be preserved
|
|
void StubCode::GenerateDeoptimizeLazyFromThrowStub(Assembler* assembler) {
|
|
// Return address for "call" to deopt stub.
|
|
__ pushl(Immediate(kZapReturnAddress));
|
|
GenerateDeoptimizationSequence(assembler, kLazyDeoptFromThrow);
|
|
__ ret();
|
|
}
|
|
|
|
void StubCode::GenerateDeoptimizeStub(Assembler* assembler) {
|
|
GenerateDeoptimizationSequence(assembler, kEagerDeopt);
|
|
__ ret();
|
|
}
|
|
|
|
static void GenerateDispatcherCode(Assembler* assembler,
|
|
Label* call_target_function) {
|
|
__ Comment("NoSuchMethodDispatch");
|
|
// When lazily generated invocation dispatchers are disabled, the
|
|
// miss-handler may return null.
|
|
const Immediate& raw_null =
|
|
Immediate(reinterpret_cast<intptr_t>(Object::null()));
|
|
__ cmpl(EAX, raw_null);
|
|
__ j(NOT_EQUAL, call_target_function);
|
|
__ EnterStubFrame();
|
|
// Load the receiver.
|
|
__ movl(EDI, FieldAddress(EDX, ArgumentsDescriptor::count_offset()));
|
|
__ movl(EAX, Address(EBP, EDI, TIMES_HALF_WORD_SIZE,
|
|
kParamEndSlotFromFp * kWordSize));
|
|
__ pushl(Immediate(0)); // Setup space on stack for result.
|
|
__ pushl(EAX); // Receiver.
|
|
__ pushl(ECX); // ICData/MegamorphicCache.
|
|
__ pushl(EDX); // Arguments descriptor array.
|
|
|
|
// Adjust arguments count.
|
|
__ cmpl(FieldAddress(EDX, ArgumentsDescriptor::type_args_len_offset()),
|
|
Immediate(0));
|
|
__ movl(EDX, EDI);
|
|
Label args_count_ok;
|
|
__ j(EQUAL, &args_count_ok, Assembler::kNearJump);
|
|
__ addl(EDX, Immediate(Smi::RawValue(1))); // Include the type arguments.
|
|
__ Bind(&args_count_ok);
|
|
|
|
// EDX: Smi-tagged arguments array length.
|
|
PushArgumentsArray(assembler);
|
|
const intptr_t kNumArgs = 4;
|
|
__ CallRuntime(kInvokeNoSuchMethodDispatcherRuntimeEntry, kNumArgs);
|
|
__ Drop(4);
|
|
__ popl(EAX); // Return value.
|
|
__ LeaveFrame();
|
|
__ ret();
|
|
}
|
|
|
|
void StubCode::GenerateMegamorphicMissStub(Assembler* assembler) {
|
|
__ EnterStubFrame();
|
|
// Load the receiver into EAX. The argument count in the arguments
|
|
// descriptor in EDX is a smi.
|
|
__ movl(EAX, FieldAddress(EDX, ArgumentsDescriptor::count_offset()));
|
|
// Two words (saved fp, stub's pc marker) in the stack above the return
|
|
// address.
|
|
__ movl(EAX, Address(ESP, EAX, TIMES_2, 2 * kWordSize));
|
|
// Preserve IC data and arguments descriptor.
|
|
__ pushl(ECX);
|
|
__ pushl(EDX);
|
|
|
|
__ pushl(Immediate(0)); // Space for the result of the runtime call.
|
|
__ pushl(EAX); // Pass receiver.
|
|
__ pushl(ECX); // Pass IC data.
|
|
__ pushl(EDX); // Pass arguments descriptor.
|
|
__ CallRuntime(kMegamorphicCacheMissHandlerRuntimeEntry, 3);
|
|
// Discard arguments.
|
|
__ popl(EAX);
|
|
__ popl(EAX);
|
|
__ popl(EAX);
|
|
__ popl(EAX); // Return value from the runtime call (function).
|
|
__ popl(EDX); // Restore arguments descriptor.
|
|
__ popl(ECX); // Restore IC data.
|
|
__ LeaveFrame();
|
|
|
|
if (!FLAG_lazy_dispatchers) {
|
|
Label call_target_function;
|
|
GenerateDispatcherCode(assembler, &call_target_function);
|
|
__ Bind(&call_target_function);
|
|
}
|
|
|
|
__ movl(EBX, FieldAddress(EAX, Function::entry_point_offset()));
|
|
__ jmp(EBX);
|
|
}
|
|
|
|
// Called for inline allocation of arrays.
|
|
// Input parameters:
|
|
// EDX : Array length as Smi (must be preserved).
|
|
// ECX : array element type (either NULL or an instantiated type).
|
|
// Uses EAX, EBX, ECX, EDI as temporary registers.
|
|
// The newly allocated object is returned in EAX.
|
|
void StubCode::GenerateAllocateArrayStub(Assembler* assembler) {
|
|
Label slow_case;
|
|
// Compute the size to be allocated, it is based on the array length
|
|
// and is computed as:
|
|
// RoundedAllocationSize((array_length * kwordSize) + sizeof(RawArray)).
|
|
// Assert that length is a Smi.
|
|
__ testl(EDX, Immediate(kSmiTagMask));
|
|
|
|
if (FLAG_use_slow_path) {
|
|
__ jmp(&slow_case);
|
|
} else {
|
|
__ j(NOT_ZERO, &slow_case);
|
|
}
|
|
__ cmpl(EDX, Immediate(0));
|
|
__ j(LESS, &slow_case);
|
|
|
|
// Check for maximum allowed length.
|
|
const Immediate& max_len = Immediate(
|
|
reinterpret_cast<int32_t>(Smi::New(Array::kMaxNewSpaceElements)));
|
|
__ cmpl(EDX, max_len);
|
|
__ j(GREATER, &slow_case);
|
|
|
|
NOT_IN_PRODUCT(
|
|
__ MaybeTraceAllocation(kArrayCid, EAX, &slow_case, Assembler::kFarJump));
|
|
|
|
const intptr_t fixed_size_plus_alignment_padding =
|
|
sizeof(RawArray) + kObjectAlignment - 1;
|
|
// EDX is Smi.
|
|
__ leal(EBX, Address(EDX, TIMES_2, fixed_size_plus_alignment_padding));
|
|
ASSERT(kSmiTagShift == 1);
|
|
__ andl(EBX, Immediate(-kObjectAlignment));
|
|
|
|
// ECX: array element type.
|
|
// EDX: array length as Smi.
|
|
// EBX: allocation size.
|
|
|
|
const intptr_t cid = kArrayCid;
|
|
NOT_IN_PRODUCT(Heap::Space space = Heap::kNew);
|
|
__ movl(EAX, Address(THR, Thread::top_offset()));
|
|
__ addl(EBX, EAX);
|
|
__ j(CARRY, &slow_case);
|
|
|
|
// Check if the allocation fits into the remaining space.
|
|
// EAX: potential new object start.
|
|
// EBX: potential next object start.
|
|
// ECX: array element type.
|
|
// EDX: array length as Smi).
|
|
__ cmpl(EBX, Address(THR, Thread::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.
|
|
__ movl(Address(THR, Thread::top_offset()), EBX);
|
|
__ subl(EBX, EAX);
|
|
__ addl(EAX, Immediate(kHeapObjectTag));
|
|
NOT_IN_PRODUCT(__ UpdateAllocationStatsWithSize(cid, EBX, EDI, space));
|
|
|
|
// Initialize the tags.
|
|
// EAX: new object start as a tagged pointer.
|
|
// EBX: allocation size.
|
|
// ECX: array element type.
|
|
// EDX: array length as Smi.
|
|
{
|
|
Label size_tag_overflow, done;
|
|
__ movl(EDI, EBX);
|
|
__ cmpl(EDI, Immediate(RawObject::SizeTag::kMaxSizeTag));
|
|
__ j(ABOVE, &size_tag_overflow, Assembler::kNearJump);
|
|
__ shll(EDI, Immediate(RawObject::kSizeTagPos - kObjectAlignmentLog2));
|
|
__ jmp(&done, Assembler::kNearJump);
|
|
|
|
__ Bind(&size_tag_overflow);
|
|
__ movl(EDI, Immediate(0));
|
|
__ Bind(&done);
|
|
|
|
// Get the class index and insert it into the tags.
|
|
__ orl(EDI, Immediate(RawObject::ClassIdTag::encode(cid)));
|
|
__ movl(FieldAddress(EAX, Array::tags_offset()), EDI); // Tags.
|
|
}
|
|
// EAX: new object start as a tagged pointer.
|
|
// EBX: allocation size.
|
|
// ECX: array element type.
|
|
// EDX: Array length as Smi (preserved).
|
|
// Store the type argument field.
|
|
// No generational barrier needed, since we store into a new object.
|
|
__ StoreIntoObjectNoBarrier(
|
|
EAX, FieldAddress(EAX, Array::type_arguments_offset()), ECX);
|
|
|
|
// Set the length field.
|
|
__ StoreIntoObjectNoBarrier(EAX, FieldAddress(EAX, Array::length_offset()),
|
|
EDX);
|
|
|
|
// Initialize all array elements to raw_null.
|
|
// EAX: new object start as a tagged pointer.
|
|
// EBX: allocation size.
|
|
// EDI: iterator which initially points to the start of the variable
|
|
// data area to be initialized.
|
|
// ECX: array element type.
|
|
// EDX: array length as Smi.
|
|
__ leal(EBX, FieldAddress(EAX, EBX, TIMES_1, 0));
|
|
__ leal(EDI, FieldAddress(EAX, sizeof(RawArray)));
|
|
Label done;
|
|
Label init_loop;
|
|
__ Bind(&init_loop);
|
|
__ cmpl(EDI, EBX);
|
|
__ j(ABOVE_EQUAL, &done, Assembler::kNearJump);
|
|
// No generational barrier needed, since we are storing null.
|
|
__ StoreIntoObjectNoBarrier(EAX, Address(EDI, 0), Object::null_object());
|
|
__ addl(EDI, Immediate(kWordSize));
|
|
__ jmp(&init_loop, Assembler::kNearJump);
|
|
__ Bind(&done);
|
|
__ ret(); // returns the newly allocated object in EAX.
|
|
|
|
// Unable to allocate the array using the fast inline code, just call
|
|
// into the runtime.
|
|
__ Bind(&slow_case);
|
|
// Create a stub frame as we are pushing some objects on the stack before
|
|
// calling into the runtime.
|
|
__ EnterStubFrame();
|
|
__ pushl(Immediate(0)); // Setup space on stack for return value.
|
|
__ pushl(EDX); // Array length as Smi.
|
|
__ pushl(ECX); // Element type.
|
|
__ CallRuntime(kAllocateArrayRuntimeEntry, 2);
|
|
__ popl(EAX); // Pop element type argument.
|
|
__ popl(EDX); // Pop array length argument (preserved).
|
|
__ popl(EAX); // Pop return value from return slot.
|
|
__ LeaveFrame();
|
|
__ ret();
|
|
}
|
|
|
|
// Called when invoking dart code from C++ (VM code).
|
|
// Input parameters:
|
|
// ESP : points to return address.
|
|
// ESP + 4 : code object of the dart function to call.
|
|
// ESP + 8 : arguments descriptor array.
|
|
// ESP + 12 : arguments array.
|
|
// ESP + 16 : current thread.
|
|
// Uses EAX, EDX, ECX, EDI as temporary registers.
|
|
void StubCode::GenerateInvokeDartCodeStub(Assembler* assembler) {
|
|
const intptr_t kTargetCodeOffset = 2 * kWordSize;
|
|
const intptr_t kArgumentsDescOffset = 3 * kWordSize;
|
|
const intptr_t kArgumentsOffset = 4 * kWordSize;
|
|
const intptr_t kThreadOffset = 5 * kWordSize;
|
|
|
|
// Save frame pointer coming in.
|
|
__ EnterFrame(0);
|
|
|
|
// Push code object to PC marker slot.
|
|
__ movl(EAX, Address(EBP, kThreadOffset));
|
|
__ pushl(Address(EAX, Thread::invoke_dart_code_stub_offset()));
|
|
|
|
// Save C++ ABI callee-saved registers.
|
|
__ pushl(EBX);
|
|
__ pushl(ESI);
|
|
__ pushl(EDI);
|
|
|
|
// Set up THR, which caches the current thread in Dart code.
|
|
__ movl(THR, EAX);
|
|
|
|
// Save the current VMTag on the stack.
|
|
__ movl(ECX, Assembler::VMTagAddress());
|
|
__ pushl(ECX);
|
|
|
|
// Mark that the thread is executing Dart code.
|
|
__ movl(Assembler::VMTagAddress(), Immediate(VMTag::kDartTagId));
|
|
|
|
// Save top resource and top exit frame info. Use EDX as a temporary register.
|
|
// StackFrameIterator reads the top exit frame info saved in this frame.
|
|
__ movl(EDX, Address(THR, Thread::top_resource_offset()));
|
|
__ pushl(EDX);
|
|
__ movl(Address(THR, Thread::top_resource_offset()), Immediate(0));
|
|
// The constant kExitLinkSlotFromEntryFp must be kept in sync with the
|
|
// code below.
|
|
ASSERT(kExitLinkSlotFromEntryFp == -7);
|
|
__ movl(EDX, Address(THR, Thread::top_exit_frame_info_offset()));
|
|
__ pushl(EDX);
|
|
__ movl(Address(THR, Thread::top_exit_frame_info_offset()), Immediate(0));
|
|
|
|
// Load arguments descriptor array into EDX.
|
|
__ movl(EDX, Address(EBP, kArgumentsDescOffset));
|
|
__ movl(EDX, Address(EDX, VMHandles::kOffsetOfRawPtrInHandle));
|
|
|
|
// No need to check for type args, disallowed by DartEntry::InvokeFunction.
|
|
// Load number of arguments into EBX.
|
|
__ movl(EBX, FieldAddress(EDX, ArgumentsDescriptor::count_offset()));
|
|
__ SmiUntag(EBX);
|
|
|
|
// Set up arguments for the dart call.
|
|
Label push_arguments;
|
|
Label done_push_arguments;
|
|
__ testl(EBX, EBX); // check if there are arguments.
|
|
__ j(ZERO, &done_push_arguments, Assembler::kNearJump);
|
|
__ movl(EAX, Immediate(0));
|
|
|
|
// Compute address of 'arguments array' data area into EDI.
|
|
__ movl(EDI, Address(EBP, kArgumentsOffset));
|
|
__ movl(EDI, Address(EDI, VMHandles::kOffsetOfRawPtrInHandle));
|
|
__ leal(EDI, FieldAddress(EDI, Array::data_offset()));
|
|
|
|
__ Bind(&push_arguments);
|
|
__ movl(ECX, Address(EDI, EAX, TIMES_4, 0));
|
|
__ pushl(ECX);
|
|
__ incl(EAX);
|
|
__ cmpl(EAX, EBX);
|
|
__ j(LESS, &push_arguments, Assembler::kNearJump);
|
|
__ Bind(&done_push_arguments);
|
|
|
|
// Call the dart code entrypoint.
|
|
__ movl(EAX, Address(EBP, kTargetCodeOffset));
|
|
__ movl(EAX, Address(EAX, VMHandles::kOffsetOfRawPtrInHandle));
|
|
__ call(FieldAddress(EAX, Code::entry_point_offset()));
|
|
|
|
// Reread the arguments descriptor array to obtain the number of passed
|
|
// arguments.
|
|
__ movl(EDX, Address(EBP, kArgumentsDescOffset));
|
|
__ movl(EDX, Address(EDX, VMHandles::kOffsetOfRawPtrInHandle));
|
|
__ movl(EDX, FieldAddress(EDX, ArgumentsDescriptor::count_offset()));
|
|
// Get rid of arguments pushed on the stack.
|
|
__ leal(ESP, Address(ESP, EDX, TIMES_2, 0)); // EDX is a Smi.
|
|
|
|
// Restore the saved top exit frame info and top resource back into the
|
|
// Isolate structure.
|
|
__ popl(Address(THR, Thread::top_exit_frame_info_offset()));
|
|
__ popl(Address(THR, Thread::top_resource_offset()));
|
|
|
|
// Restore the current VMTag from the stack.
|
|
__ popl(Assembler::VMTagAddress());
|
|
|
|
// Restore C++ ABI callee-saved registers.
|
|
__ popl(EDI);
|
|
__ popl(ESI);
|
|
__ popl(EBX);
|
|
|
|
// Restore the frame pointer.
|
|
__ LeaveFrame();
|
|
|
|
__ ret();
|
|
}
|
|
|
|
// Called for inline allocation of contexts.
|
|
// Input:
|
|
// EDX: number of context variables.
|
|
// Output:
|
|
// EAX: new allocated RawContext object.
|
|
// EBX and EDX are destroyed.
|
|
void StubCode::GenerateAllocateContextStub(Assembler* assembler) {
|
|
if (FLAG_inline_alloc) {
|
|
Label slow_case;
|
|
// First compute the rounded instance size.
|
|
// EDX: number of context variables.
|
|
intptr_t fixed_size_plus_alignment_padding =
|
|
(sizeof(RawContext) + kObjectAlignment - 1);
|
|
__ leal(EBX, Address(EDX, TIMES_4, fixed_size_plus_alignment_padding));
|
|
__ andl(EBX, Immediate(-kObjectAlignment));
|
|
|
|
NOT_IN_PRODUCT(__ MaybeTraceAllocation(kContextCid, EAX, &slow_case,
|
|
Assembler::kFarJump));
|
|
|
|
// Now allocate the object.
|
|
// EDX: number of context variables.
|
|
const intptr_t cid = kContextCid;
|
|
NOT_IN_PRODUCT(Heap::Space space = Heap::kNew);
|
|
__ movl(EAX, Address(THR, Thread::top_offset()));
|
|
__ addl(EBX, EAX);
|
|
// Check if the allocation fits into the remaining space.
|
|
// EAX: potential new object.
|
|
// EBX: potential next object start.
|
|
// EDX: number of context variables.
|
|
__ cmpl(EBX, Address(THR, Thread::end_offset()));
|
|
if (FLAG_use_slow_path) {
|
|
__ jmp(&slow_case);
|
|
} else {
|
|
#if defined(DEBUG)
|
|
static const bool kJumpLength = Assembler::kFarJump;
|
|
#else
|
|
static const bool kJumpLength = Assembler::kNearJump;
|
|
#endif // DEBUG
|
|
__ j(ABOVE_EQUAL, &slow_case, kJumpLength);
|
|
}
|
|
|
|
// Successfully allocated the object, now update top to point to
|
|
// next object start and initialize the object.
|
|
// EAX: new object.
|
|
// EBX: next object start.
|
|
// EDX: number of context variables.
|
|
__ movl(Address(THR, Thread::top_offset()), EBX);
|
|
// EBX: Size of allocation in bytes.
|
|
__ subl(EBX, EAX);
|
|
__ addl(EAX, Immediate(kHeapObjectTag));
|
|
// Generate isolate-independent code to allow sharing between isolates.
|
|
NOT_IN_PRODUCT(__ UpdateAllocationStatsWithSize(cid, EBX, EDI, space));
|
|
|
|
// Calculate the size tag.
|
|
// EAX: new object.
|
|
// EDX: number of context variables.
|
|
{
|
|
Label size_tag_overflow, done;
|
|
__ leal(EBX, Address(EDX, TIMES_4, fixed_size_plus_alignment_padding));
|
|
__ andl(EBX, Immediate(-kObjectAlignment));
|
|
__ cmpl(EBX, Immediate(RawObject::SizeTag::kMaxSizeTag));
|
|
__ j(ABOVE, &size_tag_overflow, Assembler::kNearJump);
|
|
__ shll(EBX, Immediate(RawObject::kSizeTagPos - kObjectAlignmentLog2));
|
|
__ jmp(&done);
|
|
|
|
__ Bind(&size_tag_overflow);
|
|
// Set overflow size tag value.
|
|
__ movl(EBX, Immediate(0));
|
|
|
|
__ Bind(&done);
|
|
// EAX: new object.
|
|
// EDX: number of context variables.
|
|
// EBX: size and bit tags.
|
|
__ orl(EBX, Immediate(RawObject::ClassIdTag::encode(cid)));
|
|
__ movl(FieldAddress(EAX, Context::tags_offset()), EBX); // Tags.
|
|
}
|
|
|
|
// Setup up number of context variables field.
|
|
// EAX: new object.
|
|
// EDX: number of context variables as integer value (not object).
|
|
__ movl(FieldAddress(EAX, Context::num_variables_offset()), EDX);
|
|
|
|
// Setup the parent field.
|
|
// EAX: new object.
|
|
// EDX: number of context variables.
|
|
// No generational barrier needed, since we are storing null.
|
|
__ StoreIntoObjectNoBarrier(EAX,
|
|
FieldAddress(EAX, Context::parent_offset()),
|
|
Object::null_object());
|
|
|
|
// Initialize the context variables.
|
|
// EAX: new object.
|
|
// EDX: number of context variables.
|
|
{
|
|
Label loop, entry;
|
|
__ leal(EBX, FieldAddress(EAX, Context::variable_offset(0)));
|
|
|
|
__ jmp(&entry, Assembler::kNearJump);
|
|
__ Bind(&loop);
|
|
__ decl(EDX);
|
|
// No generational barrier needed, since we are storing null.
|
|
__ StoreIntoObjectNoBarrier(EAX, Address(EBX, EDX, TIMES_4, 0),
|
|
Object::null_object());
|
|
__ Bind(&entry);
|
|
__ cmpl(EDX, Immediate(0));
|
|
__ j(NOT_EQUAL, &loop, Assembler::kNearJump);
|
|
}
|
|
|
|
// Done allocating and initializing the context.
|
|
// EAX: new object.
|
|
__ ret();
|
|
|
|
__ Bind(&slow_case);
|
|
}
|
|
// Create a stub frame as we are pushing some objects on the stack before
|
|
// calling into the runtime.
|
|
__ EnterStubFrame();
|
|
__ pushl(Immediate(0)); // Setup space on stack for return value.
|
|
__ SmiTag(EDX);
|
|
__ pushl(EDX);
|
|
__ CallRuntime(kAllocateContextRuntimeEntry, 1); // Allocate context.
|
|
__ popl(EAX); // Pop number of context variables argument.
|
|
__ popl(EAX); // Pop the new context object.
|
|
// EAX: new object
|
|
// Restore the frame pointer.
|
|
__ LeaveFrame();
|
|
__ ret();
|
|
}
|
|
|
|
// Helper stub to implement Assembler::StoreIntoObject.
|
|
// Input parameters:
|
|
// EDX: Address being stored
|
|
void StubCode::GenerateUpdateStoreBufferStub(Assembler* assembler) {
|
|
// Save values being destroyed.
|
|
__ pushl(EAX);
|
|
__ pushl(ECX);
|
|
|
|
Label add_to_buffer;
|
|
// Check whether this object has already been remembered. Skip adding to the
|
|
// store buffer if the object is in the store buffer already.
|
|
// Spilled: EAX, ECX
|
|
// EDX: Address being stored
|
|
Label reload;
|
|
__ Bind(&reload);
|
|
__ movl(EAX, FieldAddress(EDX, Object::tags_offset()));
|
|
__ testl(EAX, Immediate(1 << RawObject::kRememberedBit));
|
|
__ j(EQUAL, &add_to_buffer, Assembler::kNearJump);
|
|
__ popl(ECX);
|
|
__ popl(EAX);
|
|
__ ret();
|
|
|
|
// Update the tags that this object has been remembered.
|
|
// EDX: Address being stored
|
|
// EAX: Current tag value
|
|
__ Bind(&add_to_buffer);
|
|
__ movl(ECX, EAX);
|
|
__ orl(ECX, Immediate(1 << RawObject::kRememberedBit));
|
|
// Compare the tag word with EAX, update to ECX if unchanged.
|
|
__ LockCmpxchgl(FieldAddress(EDX, Object::tags_offset()), ECX);
|
|
__ j(NOT_EQUAL, &reload);
|
|
|
|
// Load the StoreBuffer block out of the thread. Then load top_ out of the
|
|
// StoreBufferBlock and add the address to the pointers_.
|
|
// Spilled: EAX, ECX
|
|
// EDX: Address being stored
|
|
__ movl(EAX, Address(THR, Thread::store_buffer_block_offset()));
|
|
__ movl(ECX, Address(EAX, StoreBufferBlock::top_offset()));
|
|
__ movl(Address(EAX, ECX, TIMES_4, StoreBufferBlock::pointers_offset()), EDX);
|
|
|
|
// Increment top_ and check for overflow.
|
|
// Spilled: EAX, ECX
|
|
// ECX: top_
|
|
// EAX: StoreBufferBlock
|
|
Label L;
|
|
__ incl(ECX);
|
|
__ movl(Address(EAX, StoreBufferBlock::top_offset()), ECX);
|
|
__ cmpl(ECX, Immediate(StoreBufferBlock::kSize));
|
|
// Restore values.
|
|
// Spilled: EAX, ECX
|
|
__ popl(ECX);
|
|
__ popl(EAX);
|
|
__ j(EQUAL, &L, Assembler::kNearJump);
|
|
__ ret();
|
|
|
|
// Handle overflow: Call the runtime leaf function.
|
|
__ Bind(&L);
|
|
// Setup frame, push callee-saved registers.
|
|
|
|
__ EnterCallRuntimeFrame(1 * kWordSize);
|
|
__ movl(Address(ESP, 0), THR); // Push the thread as the only argument.
|
|
__ CallRuntime(kStoreBufferBlockProcessRuntimeEntry, 1);
|
|
// Restore callee-saved registers, tear down frame.
|
|
__ LeaveCallRuntimeFrame();
|
|
__ ret();
|
|
}
|
|
|
|
// Called for inline allocation of objects.
|
|
// Input parameters:
|
|
// ESP + 4 : type arguments object (only if class is parameterized).
|
|
// ESP : points to return address.
|
|
// Uses EAX, EBX, ECX, EDX, EDI as temporary registers.
|
|
// Returns patch_code_pc offset where patching code for disabling the stub
|
|
// has been generated (similar to regularly generated Dart code).
|
|
void StubCode::GenerateAllocationStubForClass(Assembler* assembler,
|
|
const Class& cls) {
|
|
const intptr_t kObjectTypeArgumentsOffset = 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.NumTypeArguments() > 0;
|
|
ASSERT(!is_cls_parameterized ||
|
|
(cls.type_arguments_field_offset() != Class::kNoTypeArguments));
|
|
// kInlineInstanceSize is a constant used as a threshold for determining
|
|
// when the object initialization should be done as a loop or as
|
|
// straight line code.
|
|
const int kInlineInstanceSize = 12; // In words.
|
|
const intptr_t instance_size = cls.instance_size();
|
|
ASSERT(instance_size > 0);
|
|
if (is_cls_parameterized) {
|
|
__ movl(EDX, Address(ESP, kObjectTypeArgumentsOffset));
|
|
// EDX: instantiated type arguments.
|
|
}
|
|
Isolate* isolate = Isolate::Current();
|
|
if (FLAG_inline_alloc && Heap::IsAllocatableInNewSpace(instance_size) &&
|
|
!cls.TraceAllocation(isolate)) {
|
|
Label slow_case;
|
|
// Allocate the object and update top to point to
|
|
// next object start and initialize the allocated object.
|
|
// EDX: instantiated type arguments (if is_cls_parameterized).
|
|
NOT_IN_PRODUCT(Heap::Space space = Heap::kNew);
|
|
__ movl(EAX, Address(THR, Thread::top_offset()));
|
|
__ leal(EBX, Address(EAX, instance_size));
|
|
// Check if the allocation fits into the remaining space.
|
|
// EAX: potential new object start.
|
|
// EBX: potential next object start.
|
|
__ cmpl(EBX, Address(THR, Thread::end_offset()));
|
|
if (FLAG_use_slow_path) {
|
|
__ jmp(&slow_case);
|
|
} else {
|
|
__ j(ABOVE_EQUAL, &slow_case);
|
|
}
|
|
__ movl(Address(THR, Thread::top_offset()), EBX);
|
|
NOT_IN_PRODUCT(__ UpdateAllocationStats(cls.id(), ECX, space));
|
|
|
|
// EAX: new object start (untagged).
|
|
// EBX: next object start.
|
|
// EDX: new object type arguments (if is_cls_parameterized).
|
|
// Set the tags.
|
|
uint32_t tags = 0;
|
|
tags = RawObject::SizeTag::update(instance_size, tags);
|
|
ASSERT(cls.id() != kIllegalCid);
|
|
tags = RawObject::ClassIdTag::update(cls.id(), tags);
|
|
__ movl(Address(EAX, Instance::tags_offset()), Immediate(tags));
|
|
__ addl(EAX, Immediate(kHeapObjectTag));
|
|
|
|
// Initialize the remaining words of the object.
|
|
|
|
// EAX: new object (tagged).
|
|
// EBX: next object start.
|
|
// EDX: new object type arguments (if is_cls_parameterized).
|
|
// First try inlining the initialization without a loop.
|
|
if (instance_size < (kInlineInstanceSize * kWordSize)) {
|
|
// Check if the object contains any non-header fields.
|
|
// Small objects are initialized using a consecutive set of writes.
|
|
for (intptr_t current_offset = Instance::NextFieldOffset();
|
|
current_offset < instance_size; current_offset += kWordSize) {
|
|
__ StoreIntoObjectNoBarrier(EAX, FieldAddress(EAX, current_offset),
|
|
Object::null_object());
|
|
}
|
|
} else {
|
|
__ leal(ECX, FieldAddress(EAX, Instance::NextFieldOffset()));
|
|
// Loop until the whole object is initialized.
|
|
// EAX: new object (tagged).
|
|
// EBX: next object start.
|
|
// ECX: next word to be initialized.
|
|
// EDX: new object type arguments (if is_cls_parameterized).
|
|
Label init_loop;
|
|
Label done;
|
|
__ Bind(&init_loop);
|
|
__ cmpl(ECX, EBX);
|
|
__ j(ABOVE_EQUAL, &done, Assembler::kNearJump);
|
|
__ StoreIntoObjectNoBarrier(EAX, Address(ECX, 0), Object::null_object());
|
|
__ addl(ECX, Immediate(kWordSize));
|
|
__ jmp(&init_loop, Assembler::kNearJump);
|
|
__ Bind(&done);
|
|
}
|
|
if (is_cls_parameterized) {
|
|
// EAX: new object (tagged).
|
|
// EDX: new object type arguments.
|
|
// Set the type arguments in the new object.
|
|
intptr_t offset = cls.type_arguments_field_offset();
|
|
__ StoreIntoObjectNoBarrier(EAX, FieldAddress(EAX, offset), EDX);
|
|
}
|
|
// Done allocating and initializing the instance.
|
|
// EAX: new object (tagged).
|
|
__ ret();
|
|
|
|
__ Bind(&slow_case);
|
|
}
|
|
// If is_cls_parameterized:
|
|
// EDX: new object type arguments.
|
|
// Create a stub frame as we are pushing some objects on the stack before
|
|
// calling into the runtime.
|
|
__ EnterStubFrame();
|
|
__ pushl(raw_null); // Setup space on stack for return value.
|
|
__ PushObject(cls); // Push class of object to be allocated.
|
|
if (is_cls_parameterized) {
|
|
__ pushl(EDX); // Push type arguments of object to be allocated.
|
|
} else {
|
|
__ pushl(raw_null); // Push null type arguments.
|
|
}
|
|
__ CallRuntime(kAllocateObjectRuntimeEntry, 2); // Allocate object.
|
|
__ popl(EAX); // Pop argument (type arguments of object).
|
|
__ popl(EAX); // Pop argument (class of object).
|
|
__ popl(EAX); // Pop result (newly allocated object).
|
|
// EAX: new object
|
|
// Restore the frame pointer.
|
|
__ LeaveFrame();
|
|
__ ret();
|
|
}
|
|
|
|
// Called for invoking "dynamic noSuchMethod(Invocation invocation)" function
|
|
// from the entry code of a dart function after an error in passed argument
|
|
// name or number is detected.
|
|
// Input parameters:
|
|
// ESP : points to return address.
|
|
// ESP + 4 : address of last argument.
|
|
// EDX : arguments descriptor array.
|
|
// Uses EAX, EBX, EDI as temporary registers.
|
|
void StubCode::GenerateCallClosureNoSuchMethodStub(Assembler* assembler) {
|
|
__ EnterStubFrame();
|
|
|
|
// Load the receiver.
|
|
__ movl(EDI, FieldAddress(EDX, ArgumentsDescriptor::count_offset()));
|
|
__ movl(EAX, Address(EBP, EDI, TIMES_2, kParamEndSlotFromFp * kWordSize));
|
|
|
|
__ pushl(Immediate(0)); // Setup space on stack for result from noSuchMethod.
|
|
__ pushl(EAX); // Receiver.
|
|
__ pushl(EDX); // Arguments descriptor array.
|
|
|
|
// Adjust arguments count.
|
|
__ cmpl(FieldAddress(EDX, ArgumentsDescriptor::type_args_len_offset()),
|
|
Immediate(0));
|
|
__ movl(EDX, EDI);
|
|
Label args_count_ok;
|
|
__ j(EQUAL, &args_count_ok, Assembler::kNearJump);
|
|
__ addl(EDX, Immediate(Smi::RawValue(1))); // Include the type arguments.
|
|
__ Bind(&args_count_ok);
|
|
|
|
// EDX: Smi-tagged arguments array length.
|
|
PushArgumentsArray(assembler);
|
|
|
|
const intptr_t kNumArgs = 3;
|
|
__ CallRuntime(kInvokeClosureNoSuchMethodRuntimeEntry, kNumArgs);
|
|
// noSuchMethod on closures always throws an error, so it will never return.
|
|
__ int3();
|
|
}
|
|
|
|
// Cannot use function object from ICData as it may be the inlined
|
|
// function and not the top-scope function.
|
|
void StubCode::GenerateOptimizedUsageCounterIncrement(Assembler* assembler) {
|
|
Register ic_reg = ECX;
|
|
Register func_reg = EBX;
|
|
if (FLAG_trace_optimized_ic_calls) {
|
|
__ EnterStubFrame();
|
|
__ pushl(func_reg); // Preserve
|
|
__ pushl(ic_reg); // Preserve.
|
|
__ pushl(ic_reg); // Argument.
|
|
__ pushl(func_reg); // Argument.
|
|
__ CallRuntime(kTraceICCallRuntimeEntry, 2);
|
|
__ popl(EAX); // Discard argument;
|
|
__ popl(EAX); // Discard argument;
|
|
__ popl(ic_reg); // Restore.
|
|
__ popl(func_reg); // Restore.
|
|
__ LeaveFrame();
|
|
}
|
|
__ incl(FieldAddress(func_reg, Function::usage_counter_offset()));
|
|
}
|
|
|
|
// Loads function into 'temp_reg'.
|
|
void StubCode::GenerateUsageCounterIncrement(Assembler* assembler,
|
|
Register temp_reg) {
|
|
if (FLAG_optimization_counter_threshold >= 0) {
|
|
Register ic_reg = ECX;
|
|
Register func_reg = temp_reg;
|
|
ASSERT(ic_reg != func_reg);
|
|
__ Comment("Increment function counter");
|
|
__ movl(func_reg, FieldAddress(ic_reg, ICData::owner_offset()));
|
|
__ incl(FieldAddress(func_reg, Function::usage_counter_offset()));
|
|
}
|
|
}
|
|
|
|
// Note: ECX must be preserved.
|
|
// Attempt a quick Smi operation for known operations ('kind'). The ICData
|
|
// must have been primed with a Smi/Smi check that will be used for counting
|
|
// the invocations.
|
|
static void EmitFastSmiOp(Assembler* assembler,
|
|
Token::Kind kind,
|
|
intptr_t num_args,
|
|
Label* not_smi_or_overflow) {
|
|
__ Comment("Fast Smi op");
|
|
ASSERT(num_args == 2);
|
|
__ movl(EDI, Address(ESP, +1 * kWordSize)); // Right
|
|
__ movl(EAX, Address(ESP, +2 * kWordSize)); // Left
|
|
__ movl(EBX, EDI);
|
|
__ orl(EBX, EAX);
|
|
__ testl(EBX, Immediate(kSmiTagMask));
|
|
__ j(NOT_ZERO, not_smi_or_overflow, Assembler::kNearJump);
|
|
switch (kind) {
|
|
case Token::kADD: {
|
|
__ addl(EAX, EDI);
|
|
__ j(OVERFLOW, not_smi_or_overflow, Assembler::kNearJump);
|
|
break;
|
|
}
|
|
case Token::kSUB: {
|
|
__ subl(EAX, EDI);
|
|
__ j(OVERFLOW, not_smi_or_overflow, Assembler::kNearJump);
|
|
break;
|
|
}
|
|
case Token::kMUL: {
|
|
__ SmiUntag(EAX);
|
|
__ imull(EAX, EDI);
|
|
__ j(OVERFLOW, not_smi_or_overflow, Assembler::kNearJump);
|
|
break;
|
|
}
|
|
case Token::kEQ: {
|
|
Label done, is_true;
|
|
__ cmpl(EAX, EDI);
|
|
__ j(EQUAL, &is_true, Assembler::kNearJump);
|
|
__ LoadObject(EAX, Bool::False());
|
|
__ jmp(&done, Assembler::kNearJump);
|
|
__ Bind(&is_true);
|
|
__ LoadObject(EAX, Bool::True());
|
|
__ Bind(&done);
|
|
break;
|
|
}
|
|
default:
|
|
UNIMPLEMENTED();
|
|
}
|
|
|
|
// ECX: IC data object.
|
|
__ movl(EBX, FieldAddress(ECX, ICData::ic_data_offset()));
|
|
// EBX: ic_data_array with check entries: classes and target functions.
|
|
__ leal(EBX, FieldAddress(EBX, Array::data_offset()));
|
|
#if defined(DEBUG)
|
|
// Check that first entry is for Smi/Smi.
|
|
Label error, ok;
|
|
const Immediate& imm_smi_cid =
|
|
Immediate(reinterpret_cast<intptr_t>(Smi::New(kSmiCid)));
|
|
__ cmpl(Address(EBX, 0 * kWordSize), imm_smi_cid);
|
|
__ j(NOT_EQUAL, &error, Assembler::kNearJump);
|
|
__ cmpl(Address(EBX, 1 * kWordSize), imm_smi_cid);
|
|
__ j(EQUAL, &ok, Assembler::kNearJump);
|
|
__ Bind(&error);
|
|
__ Stop("Incorrect IC data");
|
|
__ Bind(&ok);
|
|
#endif
|
|
if (FLAG_optimization_counter_threshold >= 0) {
|
|
const intptr_t count_offset = ICData::CountIndexFor(num_args) * kWordSize;
|
|
// Update counter, ignore overflow.
|
|
__ addl(Address(EBX, count_offset), Immediate(Smi::RawValue(1)));
|
|
}
|
|
__ ret();
|
|
}
|
|
|
|
// Generate inline cache check for 'num_args'.
|
|
// ECX: Inline cache data object.
|
|
// TOS(0): return address
|
|
// Control flow:
|
|
// - If receiver is null -> jump to IC miss.
|
|
// - If receiver is Smi -> load Smi class.
|
|
// - If receiver is not-Smi -> load receiver's class.
|
|
// - Check if 'num_args' (including receiver) match any IC data group.
|
|
// - Match found -> jump to target.
|
|
// - Match not found -> jump to IC miss.
|
|
void StubCode::GenerateNArgsCheckInlineCacheStub(
|
|
Assembler* assembler,
|
|
intptr_t num_args,
|
|
const RuntimeEntry& handle_ic_miss,
|
|
Token::Kind kind,
|
|
bool optimized) {
|
|
ASSERT(num_args == 1 || num_args == 2);
|
|
#if defined(DEBUG)
|
|
{
|
|
Label ok;
|
|
// Check that the IC data array has NumArgsTested() == num_args.
|
|
// 'NumArgsTested' is stored in the least significant bits of 'state_bits'.
|
|
__ movl(EBX, FieldAddress(ECX, ICData::state_bits_offset()));
|
|
ASSERT(ICData::NumArgsTestedShift() == 0); // No shift needed.
|
|
__ andl(EBX, Immediate(ICData::NumArgsTestedMask()));
|
|
__ cmpl(EBX, Immediate(num_args));
|
|
__ j(EQUAL, &ok, Assembler::kNearJump);
|
|
__ Stop("Incorrect stub for IC data");
|
|
__ Bind(&ok);
|
|
}
|
|
#endif // DEBUG
|
|
|
|
#if !defined(PRODUCT)
|
|
Label stepping, done_stepping;
|
|
if (!optimized) {
|
|
__ Comment("Check single stepping");
|
|
__ LoadIsolate(EAX);
|
|
__ cmpb(Address(EAX, Isolate::single_step_offset()), Immediate(0));
|
|
__ j(NOT_EQUAL, &stepping);
|
|
__ Bind(&done_stepping);
|
|
}
|
|
#endif
|
|
Label not_smi_or_overflow;
|
|
if (kind != Token::kILLEGAL) {
|
|
EmitFastSmiOp(assembler, kind, num_args, ¬_smi_or_overflow);
|
|
}
|
|
__ Bind(¬_smi_or_overflow);
|
|
|
|
__ Comment("Extract ICData initial values and receiver cid");
|
|
// ECX: IC data object (preserved).
|
|
// Load arguments descriptor into EDX.
|
|
__ movl(EDX, FieldAddress(ECX, ICData::arguments_descriptor_offset()));
|
|
// Loop that checks if there is an IC data match.
|
|
Label loop, found, miss;
|
|
// ECX: IC data object (preserved).
|
|
__ movl(EBX, FieldAddress(ECX, ICData::ic_data_offset()));
|
|
// EBX: ic_data_array with check entries: classes and target functions.
|
|
__ leal(EBX, FieldAddress(EBX, Array::data_offset()));
|
|
// EBX: points directly to the first ic data array element.
|
|
|
|
// Get argument descriptor into EAX. In the 1-argument case this is the
|
|
// last time we need the argument descriptor, and we reuse EAX for the
|
|
// class IDs from the IC descriptor. In the 2-argument case we preserve
|
|
// the argument descriptor in EAX.
|
|
__ movl(EAX, FieldAddress(EDX, ArgumentsDescriptor::count_offset()));
|
|
if (num_args == 1) {
|
|
// Load receiver into EDI.
|
|
__ movl(EDI,
|
|
Address(ESP, EAX, TIMES_2, 0)); // EAX (argument count) is Smi.
|
|
__ LoadTaggedClassIdMayBeSmi(EAX, EDI);
|
|
// EAX: receiver class ID as Smi.
|
|
}
|
|
|
|
__ Comment("ICData loop");
|
|
|
|
// We unroll the generic one that is generated once more than the others.
|
|
bool optimize = kind == Token::kILLEGAL;
|
|
const intptr_t target_offset = ICData::TargetIndexFor(num_args) * kWordSize;
|
|
const intptr_t count_offset = ICData::CountIndexFor(num_args) * kWordSize;
|
|
const intptr_t entry_size = ICData::TestEntryLengthFor(num_args) * kWordSize;
|
|
|
|
__ Bind(&loop);
|
|
for (int unroll = optimize ? 4 : 2; unroll >= 0; unroll--) {
|
|
Label update;
|
|
if (num_args == 1) {
|
|
__ movl(EDI, Address(EBX, 0));
|
|
__ cmpl(EDI, EAX); // Class id match?
|
|
__ j(EQUAL, &found); // Break.
|
|
__ addl(EBX, Immediate(entry_size)); // Next entry.
|
|
__ cmpl(EDI, Immediate(Smi::RawValue(kIllegalCid))); // Done?
|
|
} else {
|
|
ASSERT(num_args == 2);
|
|
// Load receiver into EDI.
|
|
__ movl(EDI, Address(ESP, EAX, TIMES_2, 0));
|
|
__ LoadTaggedClassIdMayBeSmi(EDI, EDI);
|
|
__ cmpl(EDI, Address(EBX, 0)); // Class id match?
|
|
__ j(NOT_EQUAL, &update); // Continue.
|
|
|
|
// Load second argument into EDI.
|
|
__ movl(EDI, Address(ESP, EAX, TIMES_2, -kWordSize));
|
|
__ LoadTaggedClassIdMayBeSmi(EDI, EDI);
|
|
__ cmpl(EDI, Address(EBX, kWordSize)); // Class id match?
|
|
__ j(EQUAL, &found); // Break.
|
|
|
|
__ Bind(&update);
|
|
__ addl(EBX, Immediate(entry_size)); // Next entry.
|
|
__ cmpl(Address(EBX, -entry_size),
|
|
Immediate(Smi::RawValue(kIllegalCid))); // Done?
|
|
}
|
|
|
|
if (unroll == 0) {
|
|
__ j(NOT_EQUAL, &loop);
|
|
} else {
|
|
__ j(EQUAL, &miss);
|
|
}
|
|
}
|
|
|
|
__ Bind(&miss);
|
|
__ Comment("IC miss");
|
|
// Compute address of arguments (first read number of arguments from
|
|
// arguments descriptor array and then compute address on the stack).
|
|
__ movl(EAX, FieldAddress(EDX, ArgumentsDescriptor::count_offset()));
|
|
__ leal(EAX, Address(ESP, EAX, TIMES_2, 0)); // EAX is Smi.
|
|
// Create a stub frame as we are pushing some objects on the stack before
|
|
// calling into the runtime.
|
|
__ EnterStubFrame();
|
|
__ pushl(EDX); // Preserve arguments descriptor array.
|
|
__ pushl(ECX); // Preserve IC data object.
|
|
__ pushl(Immediate(0)); // Result slot.
|
|
// Push call arguments.
|
|
for (intptr_t i = 0; i < num_args; i++) {
|
|
__ movl(EBX, Address(EAX, -kWordSize * i));
|
|
__ pushl(EBX);
|
|
}
|
|
__ pushl(ECX); // Pass IC data object.
|
|
__ CallRuntime(handle_ic_miss, num_args + 1);
|
|
// Remove the call arguments pushed earlier, including the IC data object.
|
|
for (intptr_t i = 0; i < num_args + 1; i++) {
|
|
__ popl(EAX);
|
|
}
|
|
__ popl(EAX); // Pop returned function object into EAX.
|
|
__ popl(ECX); // Restore IC data array.
|
|
__ popl(EDX); // Restore arguments descriptor array.
|
|
__ LeaveFrame();
|
|
Label call_target_function;
|
|
if (!FLAG_lazy_dispatchers) {
|
|
GenerateDispatcherCode(assembler, &call_target_function);
|
|
} else {
|
|
__ jmp(&call_target_function);
|
|
}
|
|
|
|
__ Bind(&found);
|
|
|
|
// EBX: Pointer to an IC data check group.
|
|
if (FLAG_optimization_counter_threshold >= 0) {
|
|
__ Comment("Update caller's counter");
|
|
// Ignore overflow.
|
|
__ addl(Address(EBX, count_offset), Immediate(Smi::RawValue(1)));
|
|
}
|
|
|
|
__ movl(EAX, Address(EBX, target_offset));
|
|
__ Bind(&call_target_function);
|
|
__ Comment("Call target");
|
|
// EAX: Target function.
|
|
__ movl(EBX, FieldAddress(EAX, Function::entry_point_offset()));
|
|
__ jmp(EBX);
|
|
|
|
#if !defined(PRODUCT)
|
|
if (!optimized) {
|
|
__ Bind(&stepping);
|
|
__ EnterStubFrame();
|
|
__ pushl(ECX);
|
|
__ CallRuntime(kSingleStepHandlerRuntimeEntry, 0);
|
|
__ popl(ECX);
|
|
__ LeaveFrame();
|
|
__ jmp(&done_stepping);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
// Use inline cache data array to invoke the target or continue in inline
|
|
// cache miss handler. Stub for 1-argument check (receiver class).
|
|
// ECX: Inline cache data object.
|
|
// TOS(0): Return address.
|
|
// Inline cache data object structure:
|
|
// 0: function-name
|
|
// 1: N, number of arguments checked.
|
|
// 2 .. (length - 1): group of checks, each check containing:
|
|
// - N classes.
|
|
// - 1 target function.
|
|
void StubCode::GenerateOneArgCheckInlineCacheStub(Assembler* assembler) {
|
|
GenerateUsageCounterIncrement(assembler, EBX);
|
|
GenerateNArgsCheckInlineCacheStub(
|
|
assembler, 1, kInlineCacheMissHandlerOneArgRuntimeEntry, Token::kILLEGAL);
|
|
}
|
|
|
|
void StubCode::GenerateTwoArgsCheckInlineCacheStub(Assembler* assembler) {
|
|
GenerateUsageCounterIncrement(assembler, EBX);
|
|
GenerateNArgsCheckInlineCacheStub(assembler, 2,
|
|
kInlineCacheMissHandlerTwoArgsRuntimeEntry,
|
|
Token::kILLEGAL);
|
|
}
|
|
|
|
void StubCode::GenerateSmiAddInlineCacheStub(Assembler* assembler) {
|
|
GenerateUsageCounterIncrement(assembler, EBX);
|
|
GenerateNArgsCheckInlineCacheStub(
|
|
assembler, 2, kInlineCacheMissHandlerTwoArgsRuntimeEntry, Token::kADD);
|
|
}
|
|
|
|
void StubCode::GenerateSmiSubInlineCacheStub(Assembler* assembler) {
|
|
GenerateUsageCounterIncrement(assembler, EBX);
|
|
GenerateNArgsCheckInlineCacheStub(
|
|
assembler, 2, kInlineCacheMissHandlerTwoArgsRuntimeEntry, Token::kSUB);
|
|
}
|
|
|
|
void StubCode::GenerateSmiEqualInlineCacheStub(Assembler* assembler) {
|
|
GenerateUsageCounterIncrement(assembler, EBX);
|
|
GenerateNArgsCheckInlineCacheStub(
|
|
assembler, 2, kInlineCacheMissHandlerTwoArgsRuntimeEntry, Token::kEQ);
|
|
}
|
|
|
|
// Use inline cache data array to invoke the target or continue in inline
|
|
// cache miss handler. Stub for 1-argument check (receiver class).
|
|
// EDI: function which counter needs to be incremented.
|
|
// ECX: Inline cache data object.
|
|
// TOS(0): Return address.
|
|
// Inline cache data object structure:
|
|
// 0: function-name
|
|
// 1: N, number of arguments checked.
|
|
// 2 .. (length - 1): group of checks, each check containing:
|
|
// - N classes.
|
|
// - 1 target function.
|
|
void StubCode::GenerateOneArgOptimizedCheckInlineCacheStub(
|
|
Assembler* assembler) {
|
|
GenerateOptimizedUsageCounterIncrement(assembler);
|
|
GenerateNArgsCheckInlineCacheStub(assembler, 1,
|
|
kInlineCacheMissHandlerOneArgRuntimeEntry,
|
|
Token::kILLEGAL, true /* optimized */);
|
|
}
|
|
|
|
void StubCode::GenerateTwoArgsOptimizedCheckInlineCacheStub(
|
|
Assembler* assembler) {
|
|
GenerateOptimizedUsageCounterIncrement(assembler);
|
|
GenerateNArgsCheckInlineCacheStub(assembler, 2,
|
|
kInlineCacheMissHandlerTwoArgsRuntimeEntry,
|
|
Token::kILLEGAL, true /* optimized */);
|
|
}
|
|
|
|
// Intermediary stub between a static call and its target. ICData contains
|
|
// the target function and the call count.
|
|
// ECX: ICData
|
|
void StubCode::GenerateZeroArgsUnoptimizedStaticCallStub(Assembler* assembler) {
|
|
GenerateUsageCounterIncrement(assembler, EBX);
|
|
|
|
#if defined(DEBUG)
|
|
{
|
|
Label ok;
|
|
// Check that the IC data array has NumArgsTested() == num_args.
|
|
// 'NumArgsTested' is stored in the least significant bits of 'state_bits'.
|
|
__ movl(EBX, FieldAddress(ECX, ICData::state_bits_offset()));
|
|
ASSERT(ICData::NumArgsTestedShift() == 0); // No shift needed.
|
|
__ andl(EBX, Immediate(ICData::NumArgsTestedMask()));
|
|
__ cmpl(EBX, Immediate(0));
|
|
__ j(EQUAL, &ok, Assembler::kNearJump);
|
|
__ Stop("Incorrect IC data for unoptimized static call");
|
|
__ Bind(&ok);
|
|
}
|
|
#endif // DEBUG
|
|
|
|
#if !defined(PRODUCT)
|
|
// Check single stepping.
|
|
Label stepping, done_stepping;
|
|
__ LoadIsolate(EAX);
|
|
__ cmpb(Address(EAX, Isolate::single_step_offset()), Immediate(0));
|
|
__ j(NOT_EQUAL, &stepping, Assembler::kNearJump);
|
|
__ Bind(&done_stepping);
|
|
#endif
|
|
|
|
// ECX: IC data object (preserved).
|
|
__ movl(EBX, FieldAddress(ECX, ICData::ic_data_offset()));
|
|
// EBX: ic_data_array with entries: target functions and count.
|
|
__ leal(EBX, FieldAddress(EBX, Array::data_offset()));
|
|
// EBX: points directly to the first ic data array element.
|
|
const intptr_t target_offset = ICData::TargetIndexFor(0) * kWordSize;
|
|
const intptr_t count_offset = ICData::CountIndexFor(0) * kWordSize;
|
|
|
|
if (FLAG_optimization_counter_threshold >= 0) {
|
|
// Increment count for this call, ignore overflow.
|
|
__ addl(Address(EBX, count_offset), Immediate(Smi::RawValue(1)));
|
|
}
|
|
|
|
// Load arguments descriptor into EDX.
|
|
__ movl(EDX, FieldAddress(ECX, ICData::arguments_descriptor_offset()));
|
|
|
|
// Get function and call it, if possible.
|
|
__ movl(EAX, Address(EBX, target_offset));
|
|
__ movl(EBX, FieldAddress(EAX, Function::entry_point_offset()));
|
|
__ jmp(EBX);
|
|
|
|
#if !defined(PRODUCT)
|
|
__ Bind(&stepping);
|
|
__ EnterStubFrame();
|
|
__ pushl(ECX);
|
|
__ CallRuntime(kSingleStepHandlerRuntimeEntry, 0);
|
|
__ popl(ECX);
|
|
__ LeaveFrame();
|
|
__ jmp(&done_stepping, Assembler::kNearJump);
|
|
#endif
|
|
}
|
|
|
|
void StubCode::GenerateOneArgUnoptimizedStaticCallStub(Assembler* assembler) {
|
|
GenerateUsageCounterIncrement(assembler, EBX);
|
|
GenerateNArgsCheckInlineCacheStub(
|
|
assembler, 1, kStaticCallMissHandlerOneArgRuntimeEntry, Token::kILLEGAL);
|
|
}
|
|
|
|
void StubCode::GenerateTwoArgsUnoptimizedStaticCallStub(Assembler* assembler) {
|
|
GenerateUsageCounterIncrement(assembler, EBX);
|
|
GenerateNArgsCheckInlineCacheStub(
|
|
assembler, 2, kStaticCallMissHandlerTwoArgsRuntimeEntry, Token::kILLEGAL);
|
|
}
|
|
|
|
// Stub for compiling a function and jumping to the compiled code.
|
|
// ECX: IC-Data (for methods).
|
|
// EDX: Arguments descriptor.
|
|
// EAX: Function.
|
|
void StubCode::GenerateLazyCompileStub(Assembler* assembler) {
|
|
__ EnterStubFrame();
|
|
__ pushl(EDX); // Preserve arguments descriptor array.
|
|
__ pushl(ECX); // Preserve IC data object.
|
|
__ pushl(EAX); // Pass function.
|
|
__ CallRuntime(kCompileFunctionRuntimeEntry, 1);
|
|
__ popl(EAX); // Restore function.
|
|
__ popl(ECX); // Restore IC data array.
|
|
__ popl(EDX); // Restore arguments descriptor array.
|
|
__ LeaveFrame();
|
|
|
|
__ movl(EAX, FieldAddress(EAX, Function::entry_point_offset()));
|
|
__ jmp(EAX);
|
|
}
|
|
|
|
// ECX: Contains an ICData.
|
|
void StubCode::GenerateICCallBreakpointStub(Assembler* assembler) {
|
|
__ EnterStubFrame();
|
|
// Save IC data.
|
|
__ pushl(ECX);
|
|
// Room for result. Debugger stub returns address of the
|
|
// unpatched runtime stub.
|
|
__ pushl(Immediate(0)); // Room for result.
|
|
__ CallRuntime(kBreakpointRuntimeHandlerRuntimeEntry, 0);
|
|
__ popl(EAX); // Code of original stub.
|
|
__ popl(ECX); // Restore IC data.
|
|
__ LeaveFrame();
|
|
// Jump to original stub.
|
|
__ movl(EAX, FieldAddress(EAX, Code::entry_point_offset()));
|
|
__ jmp(EAX);
|
|
}
|
|
|
|
void StubCode::GenerateRuntimeCallBreakpointStub(Assembler* assembler) {
|
|
__ EnterStubFrame();
|
|
// Room for result. Debugger stub returns address of the
|
|
// unpatched runtime stub.
|
|
__ pushl(Immediate(0)); // Room for result.
|
|
__ CallRuntime(kBreakpointRuntimeHandlerRuntimeEntry, 0);
|
|
__ popl(EAX); // Code of the original stub
|
|
__ LeaveFrame();
|
|
// Jump to original stub.
|
|
__ movl(EAX, FieldAddress(EAX, Code::entry_point_offset()));
|
|
__ jmp(EAX);
|
|
}
|
|
|
|
// Called only from unoptimized code.
|
|
void StubCode::GenerateDebugStepCheckStub(Assembler* assembler) {
|
|
// Check single stepping.
|
|
Label stepping, done_stepping;
|
|
__ LoadIsolate(EAX);
|
|
__ movzxb(EAX, Address(EAX, Isolate::single_step_offset()));
|
|
__ cmpl(EAX, Immediate(0));
|
|
__ j(NOT_EQUAL, &stepping, Assembler::kNearJump);
|
|
__ Bind(&done_stepping);
|
|
__ ret();
|
|
|
|
__ Bind(&stepping);
|
|
__ EnterStubFrame();
|
|
__ CallRuntime(kSingleStepHandlerRuntimeEntry, 0);
|
|
__ LeaveFrame();
|
|
__ jmp(&done_stepping, Assembler::kNearJump);
|
|
}
|
|
|
|
// Used to check class and type arguments. Arguments passed on stack:
|
|
// TOS + 0: return address.
|
|
// TOS + 1: function type arguments (only if n == 4, can be raw_null).
|
|
// TOS + 2: instantiator type arguments (only if n == 4, can be raw_null).
|
|
// TOS + 3: instance.
|
|
// TOS + 4: SubtypeTestCache.
|
|
// Result in ECX: null -> not found, otherwise result (true or false).
|
|
static void GenerateSubtypeNTestCacheStub(Assembler* assembler, int n) {
|
|
ASSERT((n == 1) || (n == 2) || (n == 4));
|
|
const intptr_t kFunctionTypeArgumentsInBytes = 1 * kWordSize;
|
|
const intptr_t kInstantiatorTypeArgumentsInBytes = 2 * kWordSize;
|
|
const intptr_t kInstanceOffsetInBytes = 3 * kWordSize;
|
|
const intptr_t kCacheOffsetInBytes = 4 * kWordSize;
|
|
const Immediate& raw_null =
|
|
Immediate(reinterpret_cast<intptr_t>(Object::null()));
|
|
__ movl(EAX, Address(ESP, kInstanceOffsetInBytes));
|
|
if (n > 1) {
|
|
__ LoadClass(ECX, EAX, EBX);
|
|
// Compute instance type arguments into EBX.
|
|
Label has_no_type_arguments;
|
|
__ movl(EBX, raw_null);
|
|
__ movl(EDI,
|
|
FieldAddress(ECX,
|
|
Class::type_arguments_field_offset_in_words_offset()));
|
|
__ cmpl(EDI, Immediate(Class::kNoTypeArguments));
|
|
__ j(EQUAL, &has_no_type_arguments, Assembler::kNearJump);
|
|
__ movl(EBX, FieldAddress(EAX, EDI, TIMES_4, 0));
|
|
__ Bind(&has_no_type_arguments);
|
|
}
|
|
__ LoadClassId(ECX, EAX);
|
|
// EAX: instance, ECX: instance class id.
|
|
// EBX: instance type arguments (null if none), used only if n > 1.
|
|
__ movl(EDX, Address(ESP, kCacheOffsetInBytes));
|
|
// EDX: SubtypeTestCache.
|
|
__ movl(EDX, FieldAddress(EDX, SubtypeTestCache::cache_offset()));
|
|
__ addl(EDX, Immediate(Array::data_offset() - kHeapObjectTag));
|
|
|
|
Label loop, found, not_found, next_iteration;
|
|
// EDX: Entry start.
|
|
// ECX: instance class id.
|
|
// EBX: instance type arguments (still null if closure).
|
|
__ SmiTag(ECX);
|
|
__ cmpl(ECX, Immediate(Smi::RawValue(kClosureCid)));
|
|
__ j(NOT_EQUAL, &loop, Assembler::kNearJump);
|
|
__ movl(EBX, FieldAddress(EAX, Closure::function_type_arguments_offset()));
|
|
__ cmpl(EBX, raw_null); // Cache cannot be used for generic closures.
|
|
__ j(NOT_EQUAL, ¬_found, Assembler::kNearJump);
|
|
__ movl(EBX,
|
|
FieldAddress(EAX, Closure::instantiator_type_arguments_offset()));
|
|
__ movl(ECX, FieldAddress(EAX, Closure::function_offset()));
|
|
// ECX: instance class id as Smi or function.
|
|
__ Bind(&loop);
|
|
__ movl(EDI, Address(EDX, kWordSize *
|
|
SubtypeTestCache::kInstanceClassIdOrFunction));
|
|
__ cmpl(EDI, raw_null);
|
|
__ j(EQUAL, ¬_found, Assembler::kNearJump);
|
|
__ cmpl(EDI, ECX);
|
|
if (n == 1) {
|
|
__ j(EQUAL, &found, Assembler::kNearJump);
|
|
} else {
|
|
__ j(NOT_EQUAL, &next_iteration, Assembler::kNearJump);
|
|
__ movl(EDI,
|
|
Address(EDX, kWordSize * SubtypeTestCache::kInstanceTypeArguments));
|
|
__ cmpl(EDI, EBX);
|
|
if (n == 2) {
|
|
__ j(EQUAL, &found, Assembler::kNearJump);
|
|
} else {
|
|
__ j(NOT_EQUAL, &next_iteration, Assembler::kNearJump);
|
|
__ movl(EDI,
|
|
Address(EDX, kWordSize *
|
|
SubtypeTestCache::kInstantiatorTypeArguments));
|
|
__ cmpl(EDI, Address(ESP, kInstantiatorTypeArgumentsInBytes));
|
|
__ j(NOT_EQUAL, &next_iteration, Assembler::kNearJump);
|
|
__ movl(EDI, Address(EDX, kWordSize *
|
|
SubtypeTestCache::kFunctionTypeArguments));
|
|
__ cmpl(EDI, Address(ESP, kFunctionTypeArgumentsInBytes));
|
|
__ j(EQUAL, &found, Assembler::kNearJump);
|
|
}
|
|
}
|
|
__ Bind(&next_iteration);
|
|
__ addl(EDX, Immediate(kWordSize * SubtypeTestCache::kTestEntryLength));
|
|
__ jmp(&loop, Assembler::kNearJump);
|
|
// Fall through to not found.
|
|
__ Bind(¬_found);
|
|
__ movl(ECX, raw_null);
|
|
__ ret();
|
|
|
|
__ Bind(&found);
|
|
__ movl(ECX, Address(EDX, kWordSize * SubtypeTestCache::kTestResult));
|
|
__ ret();
|
|
}
|
|
|
|
// Used to check class and type arguments. Arguments passed on stack:
|
|
// TOS + 0: return address.
|
|
// TOS + 1: raw_null.
|
|
// TOS + 2: raw_null.
|
|
// TOS + 3: instance.
|
|
// TOS + 4: SubtypeTestCache.
|
|
// Result in ECX: 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: raw_null.
|
|
// TOS + 2: raw_null.
|
|
// TOS + 3: instance.
|
|
// TOS + 4: SubtypeTestCache.
|
|
// Result in ECX: 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: function type arguments (can be raw_null).
|
|
// TOS + 2: instantiator type arguments (can be raw_null).
|
|
// TOS + 3: instance.
|
|
// TOS + 4: SubtypeTestCache.
|
|
// Result in ECX: null -> not found, otherwise result (true or false).
|
|
void StubCode::GenerateSubtype4TestCacheStub(Assembler* assembler) {
|
|
GenerateSubtypeNTestCacheStub(assembler, 4);
|
|
}
|
|
|
|
// Return the current stack pointer address, used to do stack alignment checks.
|
|
// TOS + 0: return address
|
|
// Result in EAX.
|
|
void StubCode::GenerateGetCStackPointerStub(Assembler* assembler) {
|
|
__ leal(EAX, Address(ESP, kWordSize));
|
|
__ ret();
|
|
}
|
|
|
|
// Jump to a frame on the call stack.
|
|
// TOS + 0: return address
|
|
// TOS + 1: program_counter
|
|
// TOS + 2: stack_pointer
|
|
// TOS + 3: frame_pointer
|
|
// TOS + 4: thread
|
|
// No Result.
|
|
void StubCode::GenerateJumpToFrameStub(Assembler* assembler) {
|
|
__ movl(THR, Address(ESP, 4 * kWordSize)); // Load target thread.
|
|
__ movl(EBP, Address(ESP, 3 * kWordSize)); // Load target frame_pointer.
|
|
__ movl(EBX, Address(ESP, 1 * kWordSize)); // Load target PC into EBX.
|
|
__ movl(ESP, Address(ESP, 2 * kWordSize)); // Load target stack_pointer.
|
|
// Set tag.
|
|
__ movl(Assembler::VMTagAddress(), Immediate(VMTag::kDartTagId));
|
|
// Clear top exit frame.
|
|
__ movl(Address(THR, Thread::top_exit_frame_info_offset()), Immediate(0));
|
|
__ jmp(EBX); // Jump to the exception handler code.
|
|
}
|
|
|
|
// Run an exception handler. Execution comes from JumpToFrame stub.
|
|
//
|
|
// The arguments are stored in the Thread object.
|
|
// No result.
|
|
void StubCode::GenerateRunExceptionHandlerStub(Assembler* assembler) {
|
|
ASSERT(kExceptionObjectReg == EAX);
|
|
ASSERT(kStackTraceObjectReg == EDX);
|
|
__ movl(EBX, Address(THR, Thread::resume_pc_offset()));
|
|
|
|
// Load the exception from the current thread.
|
|
Address exception_addr(THR, Thread::active_exception_offset());
|
|
__ movl(kExceptionObjectReg, exception_addr);
|
|
__ movl(exception_addr, Immediate(0));
|
|
|
|
// Load the stacktrace from the current thread.
|
|
Address stacktrace_addr(THR, Thread::active_stacktrace_offset());
|
|
__ movl(kStackTraceObjectReg, stacktrace_addr);
|
|
__ movl(stacktrace_addr, Immediate(0));
|
|
|
|
__ jmp(EBX); // Jump to continuation point.
|
|
}
|
|
|
|
// Deoptimize a frame on the call stack before rewinding.
|
|
// The arguments are stored in the Thread object.
|
|
// No result.
|
|
void StubCode::GenerateDeoptForRewindStub(Assembler* assembler) {
|
|
// Push the deopt pc.
|
|
__ pushl(Address(THR, Thread::resume_pc_offset()));
|
|
GenerateDeoptimizationSequence(assembler, kEagerDeopt);
|
|
|
|
// After we have deoptimized, jump to the correct frame.
|
|
__ EnterStubFrame();
|
|
__ CallRuntime(kRewindPostDeoptRuntimeEntry, 0);
|
|
__ LeaveFrame();
|
|
__ int3();
|
|
}
|
|
|
|
// Calls to the runtime to optimize the given function.
|
|
// EBX: function to be reoptimized.
|
|
// EDX: argument descriptor (preserved).
|
|
void StubCode::GenerateOptimizeFunctionStub(Assembler* assembler) {
|
|
__ EnterStubFrame();
|
|
__ pushl(EDX);
|
|
__ pushl(Immediate(0)); // Setup space on stack for return value.
|
|
__ pushl(EBX);
|
|
__ CallRuntime(kOptimizeInvokedFunctionRuntimeEntry, 1);
|
|
__ popl(EAX); // Discard argument.
|
|
__ popl(EAX); // Get Function object
|
|
__ popl(EDX); // Restore argument descriptor.
|
|
__ LeaveFrame();
|
|
__ movl(CODE_REG, FieldAddress(EAX, Function::code_offset()));
|
|
__ movl(EAX, FieldAddress(EAX, Function::entry_point_offset()));
|
|
__ jmp(EAX);
|
|
__ int3();
|
|
}
|
|
|
|
// Does identical check (object references are equal or not equal) with special
|
|
// checks for boxed numbers.
|
|
// Return ZF set.
|
|
// Note: A Mint cannot contain a value that would fit in Smi, a Bigint
|
|
// cannot contain a value that fits in Mint or Smi.
|
|
static void GenerateIdenticalWithNumberCheckStub(Assembler* assembler,
|
|
const Register left,
|
|
const Register right,
|
|
const Register temp) {
|
|
Label reference_compare, done, check_mint, check_bigint;
|
|
// If any of the arguments is Smi do reference compare.
|
|
__ testl(left, Immediate(kSmiTagMask));
|
|
__ j(ZERO, &reference_compare, Assembler::kNearJump);
|
|
__ testl(right, Immediate(kSmiTagMask));
|
|
__ j(ZERO, &reference_compare, Assembler::kNearJump);
|
|
|
|
// Value compare for two doubles.
|
|
__ CompareClassId(left, kDoubleCid, temp);
|
|
__ j(NOT_EQUAL, &check_mint, Assembler::kNearJump);
|
|
__ CompareClassId(right, kDoubleCid, temp);
|
|
__ j(NOT_EQUAL, &done, Assembler::kNearJump);
|
|
|
|
// Double values bitwise compare.
|
|
__ movl(temp, FieldAddress(left, Double::value_offset() + 0 * kWordSize));
|
|
__ cmpl(temp, FieldAddress(right, Double::value_offset() + 0 * kWordSize));
|
|
__ j(NOT_EQUAL, &done, Assembler::kNearJump);
|
|
__ movl(temp, FieldAddress(left, Double::value_offset() + 1 * kWordSize));
|
|
__ cmpl(temp, FieldAddress(right, Double::value_offset() + 1 * kWordSize));
|
|
__ jmp(&done, Assembler::kNearJump);
|
|
|
|
__ Bind(&check_mint);
|
|
__ CompareClassId(left, kMintCid, temp);
|
|
__ j(NOT_EQUAL, &check_bigint, Assembler::kNearJump);
|
|
__ CompareClassId(right, kMintCid, temp);
|
|
__ j(NOT_EQUAL, &done, Assembler::kNearJump);
|
|
__ movl(temp, FieldAddress(left, Mint::value_offset() + 0 * kWordSize));
|
|
__ cmpl(temp, FieldAddress(right, Mint::value_offset() + 0 * kWordSize));
|
|
__ j(NOT_EQUAL, &done, Assembler::kNearJump);
|
|
__ movl(temp, FieldAddress(left, Mint::value_offset() + 1 * kWordSize));
|
|
__ cmpl(temp, FieldAddress(right, Mint::value_offset() + 1 * kWordSize));
|
|
__ jmp(&done, Assembler::kNearJump);
|
|
|
|
__ Bind(&check_bigint);
|
|
__ CompareClassId(left, kBigintCid, temp);
|
|
__ j(NOT_EQUAL, &reference_compare, Assembler::kNearJump);
|
|
__ CompareClassId(right, kBigintCid, temp);
|
|
__ j(NOT_EQUAL, &done, Assembler::kNearJump);
|
|
__ EnterFrame(0);
|
|
__ ReserveAlignedFrameSpace(2 * kWordSize);
|
|
__ movl(Address(ESP, 1 * kWordSize), left);
|
|
__ movl(Address(ESP, 0 * kWordSize), right);
|
|
__ CallRuntime(kBigintCompareRuntimeEntry, 2);
|
|
// Result in EAX, 0 means equal.
|
|
__ LeaveFrame();
|
|
__ cmpl(EAX, Immediate(0));
|
|
__ jmp(&done);
|
|
|
|
__ Bind(&reference_compare);
|
|
__ cmpl(left, right);
|
|
__ Bind(&done);
|
|
}
|
|
|
|
// Called only from unoptimized code. All relevant registers have been saved.
|
|
// TOS + 0: return address
|
|
// TOS + 1: right argument.
|
|
// TOS + 2: left argument.
|
|
// Returns ZF set.
|
|
void StubCode::GenerateUnoptimizedIdenticalWithNumberCheckStub(
|
|
Assembler* assembler) {
|
|
#if !defined(PRODUCT)
|
|
// Check single stepping.
|
|
Label stepping, done_stepping;
|
|
__ LoadIsolate(EAX);
|
|
__ movzxb(EAX, Address(EAX, Isolate::single_step_offset()));
|
|
__ cmpl(EAX, Immediate(0));
|
|
__ j(NOT_EQUAL, &stepping);
|
|
__ Bind(&done_stepping);
|
|
#endif
|
|
|
|
const Register left = EAX;
|
|
const Register right = EDX;
|
|
const Register temp = ECX;
|
|
__ movl(left, Address(ESP, 2 * kWordSize));
|
|
__ movl(right, Address(ESP, 1 * kWordSize));
|
|
GenerateIdenticalWithNumberCheckStub(assembler, left, right, temp);
|
|
__ ret();
|
|
|
|
#if !defined(PRODUCT)
|
|
__ Bind(&stepping);
|
|
__ EnterStubFrame();
|
|
__ CallRuntime(kSingleStepHandlerRuntimeEntry, 0);
|
|
__ LeaveFrame();
|
|
__ jmp(&done_stepping);
|
|
#endif
|
|
}
|
|
|
|
// Called from optimized code only.
|
|
// TOS + 0: return address
|
|
// TOS + 1: right argument.
|
|
// TOS + 2: left argument.
|
|
// Returns ZF set.
|
|
void StubCode::GenerateOptimizedIdenticalWithNumberCheckStub(
|
|
Assembler* assembler) {
|
|
const Register left = EAX;
|
|
const Register right = EDX;
|
|
const Register temp = ECX;
|
|
__ movl(left, Address(ESP, 2 * kWordSize));
|
|
__ movl(right, Address(ESP, 1 * kWordSize));
|
|
GenerateIdenticalWithNumberCheckStub(assembler, left, right, temp);
|
|
__ ret();
|
|
}
|
|
|
|
// Called from megamorphic calls.
|
|
// EBX: receiver
|
|
// ECX: MegamorphicCache (preserved)
|
|
// Passed to target:
|
|
// EBX: target entry point
|
|
// EDX: argument descriptor
|
|
void StubCode::GenerateMegamorphicCallStub(Assembler* assembler) {
|
|
// Jump if receiver is a smi.
|
|
Label smi_case;
|
|
// Check if object (in tmp) is a Smi.
|
|
__ testl(EBX, Immediate(kSmiTagMask));
|
|
// Jump out of line for smi case.
|
|
__ j(ZERO, &smi_case, Assembler::kNearJump);
|
|
|
|
// Loads the cid of the instance.
|
|
__ LoadClassId(EAX, EBX);
|
|
|
|
Label cid_loaded;
|
|
__ Bind(&cid_loaded);
|
|
__ movl(EBX, FieldAddress(ECX, MegamorphicCache::mask_offset()));
|
|
__ movl(EDI, FieldAddress(ECX, MegamorphicCache::buckets_offset()));
|
|
// EDI: cache buckets array.
|
|
// EBX: mask as a smi.
|
|
|
|
// Tag cid as a smi.
|
|
__ addl(EAX, EAX);
|
|
|
|
// Compute the table index.
|
|
ASSERT(MegamorphicCache::kSpreadFactor == 7);
|
|
// Use leal and subl multiply with 7 == 8 - 1.
|
|
__ leal(EDX, Address(EAX, TIMES_8, 0));
|
|
__ subl(EDX, EAX);
|
|
|
|
Label loop;
|
|
__ Bind(&loop);
|
|
__ andl(EDX, EBX);
|
|
|
|
const intptr_t base = Array::data_offset();
|
|
Label probe_failed;
|
|
// EDX is smi tagged, but table entries are two words, so TIMES_4.
|
|
__ cmpl(EAX, FieldAddress(EDI, EDX, TIMES_4, base));
|
|
__ j(NOT_EQUAL, &probe_failed, Assembler::kNearJump);
|
|
|
|
Label load_target;
|
|
__ Bind(&load_target);
|
|
// Call the target found in the cache. For a class id match, this is a
|
|
// proper target for the given name and arguments descriptor. If the
|
|
// illegal class id was found, the target is a cache miss handler that can
|
|
// be invoked as a normal Dart function.
|
|
__ movl(EAX, FieldAddress(EDI, EDX, TIMES_4, base + kWordSize));
|
|
__ movl(EDX,
|
|
FieldAddress(ECX, MegamorphicCache::arguments_descriptor_offset()));
|
|
__ movl(EBX, FieldAddress(EAX, Function::entry_point_offset()));
|
|
__ ret();
|
|
|
|
__ Bind(&probe_failed);
|
|
// Probe failed, check if it is a miss.
|
|
__ cmpl(FieldAddress(EDI, EDX, TIMES_4, base),
|
|
Immediate(Smi::RawValue(kIllegalCid)));
|
|
__ j(ZERO, &load_target, Assembler::kNearJump);
|
|
|
|
// Try next entry in the table.
|
|
__ AddImmediate(EDX, Immediate(Smi::RawValue(1)));
|
|
__ jmp(&loop);
|
|
|
|
// Load cid for the Smi case.
|
|
__ Bind(&smi_case);
|
|
__ movl(EAX, Immediate(kSmiCid));
|
|
__ jmp(&cid_loaded);
|
|
}
|
|
|
|
// Called from switchable IC calls.
|
|
// EBX: receiver
|
|
// ECX: ICData (preserved)
|
|
// Passed to target:
|
|
// EDX: arguments descriptor
|
|
void StubCode::GenerateICCallThroughFunctionStub(Assembler* assembler) {
|
|
__ int3();
|
|
}
|
|
|
|
void StubCode::GenerateICCallThroughCodeStub(Assembler* assembler) {
|
|
__ int3();
|
|
}
|
|
|
|
void StubCode::GenerateUnlinkedCallStub(Assembler* assembler) {
|
|
__ int3();
|
|
}
|
|
|
|
void StubCode::GenerateSingleTargetCallStub(Assembler* assembler) {
|
|
__ int3();
|
|
}
|
|
|
|
void StubCode::GenerateMonomorphicMissStub(Assembler* assembler) {
|
|
__ int3();
|
|
}
|
|
|
|
void StubCode::GenerateFrameAwaitingMaterializationStub(Assembler* assembler) {
|
|
__ int3();
|
|
}
|
|
|
|
void StubCode::GenerateAsynchronousGapMarkerStub(Assembler* assembler) {
|
|
__ int3();
|
|
}
|
|
|
|
} // namespace dart
|
|
|
|
#endif // defined(TARGET_ARCH_IA32) && !defined(DART_PRECOMPILED_RUNTIME)
|