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On platforms that already use an object pool, we had a separate object table used only for deoptimization infos. With this CL we don't have separate tables, but only use the common object pool for both purposes. R=vegorov@google.com Review URL: https://codereview.chromium.org//1073173003 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@45108 260f80e4-7a28-3924-810f-c04153c831b5
1264 lines
39 KiB
C++
1264 lines
39 KiB
C++
// Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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#include "vm/deopt_instructions.h"
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#include "vm/assembler.h"
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#include "vm/code_patcher.h"
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#include "vm/compiler.h"
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#include "vm/intermediate_language.h"
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#include "vm/locations.h"
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#include "vm/parser.h"
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#include "vm/stack_frame.h"
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#include "vm/thread.h"
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namespace dart {
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DEFINE_FLAG(bool, compress_deopt_info, true,
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"Compress the size of the deoptimization info for optimized code.");
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DECLARE_FLAG(bool, trace_deoptimization);
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DECLARE_FLAG(bool, trace_deoptimization_verbose);
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DeoptContext::DeoptContext(const StackFrame* frame,
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const Code& code,
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DestFrameOptions dest_options,
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fpu_register_t* fpu_registers,
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intptr_t* cpu_registers)
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: code_(code.raw()),
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object_pool_(code.ObjectPool()),
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deopt_info_(TypedData::null()),
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dest_frame_is_allocated_(false),
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dest_frame_(NULL),
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dest_frame_size_(0),
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source_frame_is_allocated_(false),
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source_frame_(NULL),
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source_frame_size_(0),
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cpu_registers_(cpu_registers),
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fpu_registers_(fpu_registers),
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num_args_(0),
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deopt_reason_(ICData::kDeoptUnknown),
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deopt_flags_(0),
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thread_(Thread::Current()),
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deferred_slots_(NULL),
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deferred_objects_count_(0),
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deferred_objects_(NULL) {
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const TypedData& deopt_info = TypedData::Handle(
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code.GetDeoptInfoAtPc(frame->pc(), &deopt_reason_, &deopt_flags_));
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ASSERT(!deopt_info.IsNull());
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deopt_info_ = deopt_info.raw();
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const Function& function = Function::Handle(code.function());
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// Do not include incoming arguments if there are optional arguments
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// (they are copied into local space at method entry).
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num_args_ =
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function.HasOptionalParameters() ? 0 : function.num_fixed_parameters();
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// The fixed size section of the (fake) Dart frame called via a stub by the
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// optimized function contains FP, PP (ARM and MIPS only), PC-marker and
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// return-address. This section is copied as well, so that its contained
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// values can be updated before returning to the deoptimized function.
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source_frame_size_ =
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+ kDartFrameFixedSize // For saved values below sp.
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+ ((frame->fp() - frame->sp()) / kWordSize) // For frame size incl. sp.
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+ 1 // For fp.
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+ kParamEndSlotFromFp // For saved values above fp.
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+ num_args_; // For arguments.
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source_frame_ = reinterpret_cast<intptr_t*>(
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frame->sp() - (kDartFrameFixedSize * kWordSize));
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if (dest_options == kDestIsOriginalFrame) {
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// Work from a copy of the source frame.
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intptr_t* original_frame = source_frame_;
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source_frame_ = new intptr_t[source_frame_size_];
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ASSERT(source_frame_ != NULL);
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for (intptr_t i = 0; i < source_frame_size_; i++) {
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source_frame_[i] = original_frame[i];
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}
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source_frame_is_allocated_ = true;
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}
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caller_fp_ = GetSourceFp();
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dest_frame_size_ = DeoptInfo::FrameSize(deopt_info);
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if (dest_options == kDestIsAllocated) {
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dest_frame_ = new intptr_t[dest_frame_size_];
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ASSERT(source_frame_ != NULL);
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for (intptr_t i = 0; i < dest_frame_size_; i++) {
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dest_frame_[i] = 0;
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}
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dest_frame_is_allocated_ = true;
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}
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if (FLAG_trace_deoptimization || FLAG_trace_deoptimization_verbose) {
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OS::PrintErr(
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"Deoptimizing (reason %d '%s') at pc %#" Px " '%s' (count %d)\n",
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deopt_reason(),
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DeoptReasonToCString(deopt_reason()),
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frame->pc(),
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function.ToFullyQualifiedCString(),
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function.deoptimization_counter());
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}
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}
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DeoptContext::~DeoptContext() {
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// Delete memory for source frame and registers.
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if (source_frame_is_allocated_) {
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delete[] source_frame_;
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}
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source_frame_ = NULL;
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delete[] fpu_registers_;
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delete[] cpu_registers_;
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fpu_registers_ = NULL;
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cpu_registers_ = NULL;
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if (dest_frame_is_allocated_) {
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delete[] dest_frame_;
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}
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dest_frame_ = NULL;
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// Delete all deferred objects.
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for (intptr_t i = 0; i < deferred_objects_count_; i++) {
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delete deferred_objects_[i];
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}
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delete[] deferred_objects_;
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deferred_objects_ = NULL;
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deferred_objects_count_ = 0;
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}
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void DeoptContext::VisitObjectPointers(ObjectPointerVisitor* visitor) {
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visitor->VisitPointer(reinterpret_cast<RawObject**>(&object_pool_));
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visitor->VisitPointer(reinterpret_cast<RawObject**>(&deopt_info_));
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// Visit any object pointers on the destination stack.
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if (dest_frame_is_allocated_) {
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for (intptr_t i = 0; i < dest_frame_size_; i++) {
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if (dest_frame_[i] != 0) {
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visitor->VisitPointer(reinterpret_cast<RawObject**>(&dest_frame_[i]));
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}
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}
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}
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}
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intptr_t DeoptContext::DestStackAdjustment() const {
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return (dest_frame_size_
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- kDartFrameFixedSize
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- num_args_
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- kParamEndSlotFromFp
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- 1); // For fp.
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}
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intptr_t DeoptContext::GetSourceFp() const {
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return source_frame_[source_frame_size_ - 1 - num_args_ -
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kParamEndSlotFromFp];
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}
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intptr_t DeoptContext::GetSourcePp() const {
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return source_frame_[source_frame_size_ - 1 - num_args_ -
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kParamEndSlotFromFp +
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StackFrame::SavedCallerPpSlotFromFp()];
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}
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intptr_t DeoptContext::GetSourcePc() const {
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return source_frame_[source_frame_size_ - num_args_ + kSavedPcSlotFromSp];
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}
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intptr_t DeoptContext::GetCallerFp() const {
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return caller_fp_;
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}
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void DeoptContext::SetCallerFp(intptr_t caller_fp) {
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caller_fp_ = caller_fp;
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}
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static bool IsObjectInstruction(DeoptInstr::Kind kind) {
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switch (kind) {
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case DeoptInstr::kConstant:
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case DeoptInstr::kPp:
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case DeoptInstr::kCallerPp:
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case DeoptInstr::kMaterializedObjectRef:
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case DeoptInstr::kFloat32x4:
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case DeoptInstr::kInt32x4:
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case DeoptInstr::kFloat64x2:
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case DeoptInstr::kWord:
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case DeoptInstr::kDouble:
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case DeoptInstr::kMint:
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case DeoptInstr::kMintPair:
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case DeoptInstr::kInt32:
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case DeoptInstr::kUint32:
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return true;
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case DeoptInstr::kRetAddress:
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case DeoptInstr::kPcMarker:
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case DeoptInstr::kCallerFp:
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case DeoptInstr::kCallerPc:
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return false;
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case DeoptInstr::kMaterializeObject:
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default:
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// We should not encounter these instructions when filling stack slots.
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UNREACHABLE();
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return false;
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}
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UNREACHABLE();
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return false;
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}
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void DeoptContext::FillDestFrame() {
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const Code& code = Code::Handle(code_);
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const TypedData& deopt_info = TypedData::Handle(deopt_info_);
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GrowableArray<DeoptInstr*> deopt_instructions;
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const Array& deopt_table = Array::Handle(code.deopt_info_array());
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ASSERT(!deopt_table.IsNull());
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DeoptInfo::Unpack(deopt_table, deopt_info, &deopt_instructions);
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const intptr_t len = deopt_instructions.length();
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const intptr_t frame_size = dest_frame_size_;
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// For now, we never place non-objects in the deoptimized frame if
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// the destination frame is a copy. This allows us to copy the
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// deoptimized frame into an Array.
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const bool objects_only = dest_frame_is_allocated_;
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// All kMaterializeObject instructions are emitted before the instructions
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// that describe stack frames. Skip them and defer materialization of
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// objects until the frame is fully reconstructed and it is safe to perform
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// GC.
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// Arguments (class of the instance to allocate and field-value pairs) are
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// described as part of the expression stack for the bottom-most deoptimized
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// frame. They will be used during materialization and removed from the stack
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// right before control switches to the unoptimized code.
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const intptr_t num_materializations =
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DeoptInfo::NumMaterializations(deopt_instructions);
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PrepareForDeferredMaterialization(num_materializations);
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for (intptr_t from_index = 0, to_index = kDartFrameFixedSize;
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from_index < num_materializations;
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from_index++) {
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const intptr_t field_count =
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DeoptInstr::GetFieldCount(deopt_instructions[from_index]);
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intptr_t* args = GetDestFrameAddressAt(to_index);
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DeferredObject* obj = new DeferredObject(field_count, args);
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SetDeferredObjectAt(from_index, obj);
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to_index += obj->ArgumentCount();
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}
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// Populate stack frames.
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for (intptr_t to_index = frame_size - 1, from_index = len - 1;
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to_index >= 0;
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to_index--, from_index--) {
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intptr_t* to_addr = GetDestFrameAddressAt(to_index);
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DeoptInstr* instr = deopt_instructions[from_index];
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if (!objects_only || IsObjectInstruction(instr->kind())) {
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instr->Execute(this, to_addr);
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} else {
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*reinterpret_cast<RawObject**>(to_addr) = Object::null();
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}
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}
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if (FLAG_trace_deoptimization_verbose) {
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intptr_t* start = dest_frame_;
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for (intptr_t i = 0; i < frame_size; i++) {
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OS::PrintErr("*%" Pd ". [0x%" Px "] 0x%" Px " [%s]\n",
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i,
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reinterpret_cast<uword>(&start[i]),
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start[i],
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deopt_instructions[i + (len - frame_size)]->ToCString());
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}
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}
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}
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static void FillDeferredSlots(DeoptContext* deopt_context,
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DeferredSlot** slot_list) {
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DeferredSlot* slot = *slot_list;
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*slot_list = NULL;
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while (slot != NULL) {
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DeferredSlot* current = slot;
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slot = slot->next();
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current->Materialize(deopt_context);
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delete current;
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}
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}
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// Materializes all deferred objects. Returns the total number of
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// artificial arguments used during deoptimization.
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intptr_t DeoptContext::MaterializeDeferredObjects() {
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// Populate slots with references to all unboxed "primitive" values (doubles,
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// mints, simd) and deferred objects. Deferred objects are only allocated
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// but not filled with data. This is done later because deferred objects
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// can references each other.
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FillDeferredSlots(this, &deferred_slots_);
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// Compute total number of artificial arguments used during deoptimization.
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intptr_t deopt_arg_count = 0;
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for (intptr_t i = 0; i < DeferredObjectsCount(); i++) {
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GetDeferredObject(i)->Fill();
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deopt_arg_count += GetDeferredObject(i)->ArgumentCount();
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}
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// Since this is the only step where GC can occur during deoptimization,
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// use it to report the source line where deoptimization occured.
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if (FLAG_trace_deoptimization || FLAG_trace_deoptimization_verbose) {
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DartFrameIterator iterator;
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StackFrame* top_frame = iterator.NextFrame();
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ASSERT(top_frame != NULL);
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const Code& code = Code::Handle(top_frame->LookupDartCode());
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const Function& top_function = Function::Handle(code.function());
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const Script& script = Script::Handle(top_function.script());
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const intptr_t token_pos = code.GetTokenIndexOfPC(top_frame->pc());
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intptr_t line, column;
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script.GetTokenLocation(token_pos, &line, &column);
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String& line_string = String::Handle(script.GetLine(line));
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OS::PrintErr(" Function: %s\n", top_function.ToFullyQualifiedCString());
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char line_buffer[80];
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OS::SNPrint(line_buffer, sizeof(line_buffer), " Line %" Pd ": '%s'",
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line, line_string.ToCString());
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OS::PrintErr("%s\n", line_buffer);
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OS::PrintErr(" Deopt args: %" Pd "\n", deopt_arg_count);
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}
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return deopt_arg_count;
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}
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RawArray* DeoptContext::DestFrameAsArray() {
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ASSERT(dest_frame_ != NULL && dest_frame_is_allocated_);
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const Array& dest_array =
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Array::Handle(zone(), Array::New(dest_frame_size_));
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PassiveObject& obj = PassiveObject::Handle(zone());
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for (intptr_t i = 0; i < dest_frame_size_; i++) {
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obj = reinterpret_cast<RawObject*>(dest_frame_[i]);
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dest_array.SetAt(i, obj);
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}
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return dest_array.raw();
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}
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// Deoptimization instruction creating return address using function and
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// deopt-id stored at 'object_table_index'.
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class DeoptRetAddressInstr : public DeoptInstr {
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public:
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DeoptRetAddressInstr(intptr_t object_table_index, intptr_t deopt_id)
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: object_table_index_(object_table_index), deopt_id_(deopt_id) {
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ASSERT(object_table_index >= 0);
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ASSERT(deopt_id >= 0);
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}
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explicit DeoptRetAddressInstr(intptr_t source_index)
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: object_table_index_(ObjectTableIndex::decode(source_index)),
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deopt_id_(DeoptId::decode(source_index)) {
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}
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virtual intptr_t source_index() const {
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return ObjectTableIndex::encode(object_table_index_) |
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DeoptId::encode(deopt_id_);
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}
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virtual DeoptInstr::Kind kind() const { return kRetAddress; }
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virtual const char* ArgumentsToCString() const {
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return Thread::Current()->zone()->PrintToString(
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"%" Pd ", %" Pd "", object_table_index_, deopt_id_);
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}
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void Execute(DeoptContext* deopt_context, intptr_t* dest_addr) {
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*dest_addr = Smi::RawValue(0);
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deopt_context->DeferRetAddrMaterialization(
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object_table_index_, deopt_id_, dest_addr);
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}
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intptr_t object_table_index() const { return object_table_index_; }
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intptr_t deopt_id() const { return deopt_id_; }
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private:
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static const intptr_t kFieldWidth = kBitsPerWord / 2;
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class ObjectTableIndex : public BitField<intptr_t, 0, kFieldWidth> { };
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class DeoptId : public BitField<intptr_t, kFieldWidth, kFieldWidth> { };
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const intptr_t object_table_index_;
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const intptr_t deopt_id_;
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DISALLOW_COPY_AND_ASSIGN(DeoptRetAddressInstr);
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};
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// Deoptimization instruction moving a constant stored at 'object_table_index'.
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class DeoptConstantInstr : public DeoptInstr {
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public:
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explicit DeoptConstantInstr(intptr_t object_table_index)
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: object_table_index_(object_table_index) {
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ASSERT(object_table_index >= 0);
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}
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virtual intptr_t source_index() const { return object_table_index_; }
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virtual DeoptInstr::Kind kind() const { return kConstant; }
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virtual const char* ArgumentsToCString() const {
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return Thread::Current()->zone()->PrintToString(
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"%" Pd "", object_table_index_);
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}
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void Execute(DeoptContext* deopt_context, intptr_t* dest_addr) {
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const PassiveObject& obj = PassiveObject::Handle(
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deopt_context->zone(), deopt_context->ObjectAt(object_table_index_));
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*reinterpret_cast<RawObject**>(dest_addr) = obj.raw();
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}
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private:
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const intptr_t object_table_index_;
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DISALLOW_COPY_AND_ASSIGN(DeoptConstantInstr);
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};
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// Deoptimization instruction moving value from optimized frame at
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// 'source_index' to specified slots in the unoptimized frame.
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// 'source_index' represents the slot index of the frame (0 being
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// first argument) and accounts for saved return address, frame
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// pointer, pool pointer and pc marker.
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// Deoptimization instruction moving a CPU register.
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class DeoptWordInstr: public DeoptInstr {
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public:
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explicit DeoptWordInstr(intptr_t source_index)
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: source_(source_index) {}
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explicit DeoptWordInstr(const CpuRegisterSource& source)
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: source_(source) {}
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virtual intptr_t source_index() const { return source_.source_index(); }
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virtual DeoptInstr::Kind kind() const { return kWord; }
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virtual const char* ArgumentsToCString() const {
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return source_.ToCString();
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}
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void Execute(DeoptContext* deopt_context, intptr_t* dest_addr) {
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*dest_addr = source_.Value<intptr_t>(deopt_context);
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}
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private:
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const CpuRegisterSource source_;
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DISALLOW_COPY_AND_ASSIGN(DeoptWordInstr);
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};
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class DeoptIntegerInstrBase: public DeoptInstr {
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public:
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DeoptIntegerInstrBase() { }
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void Execute(DeoptContext* deopt_context, intptr_t* dest_addr) {
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const int64_t value = GetValue(deopt_context);
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if (Smi::IsValid(value)) {
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*dest_addr = Smi::RawValue(static_cast<intptr_t>(value));
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} else {
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*dest_addr = Smi::RawValue(0);
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deopt_context->DeferMintMaterialization(
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value, reinterpret_cast<RawMint**>(dest_addr));
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}
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}
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virtual int64_t GetValue(DeoptContext* deopt_context) = 0;
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private:
|
|
DISALLOW_COPY_AND_ASSIGN(DeoptIntegerInstrBase);
|
|
};
|
|
|
|
|
|
class DeoptMintPairInstr: public DeoptIntegerInstrBase {
|
|
public:
|
|
explicit DeoptMintPairInstr(intptr_t source_index)
|
|
: DeoptIntegerInstrBase(),
|
|
lo_(LoRegister::decode(source_index)),
|
|
hi_(HiRegister::decode(source_index)) {
|
|
}
|
|
|
|
DeoptMintPairInstr(const CpuRegisterSource& lo, const CpuRegisterSource& hi)
|
|
: DeoptIntegerInstrBase(), lo_(lo), hi_(hi) {}
|
|
|
|
virtual intptr_t source_index() const {
|
|
return LoRegister::encode(lo_.source_index()) |
|
|
HiRegister::encode(hi_.source_index());
|
|
}
|
|
virtual DeoptInstr::Kind kind() const { return kMintPair; }
|
|
|
|
virtual const char* ArgumentsToCString() const {
|
|
return Thread::Current()->zone()->PrintToString(
|
|
"%s,%s",
|
|
lo_.ToCString(),
|
|
hi_.ToCString());
|
|
}
|
|
|
|
virtual int64_t GetValue(DeoptContext* deopt_context) {
|
|
return Utils::LowHighTo64Bits(
|
|
lo_.Value<uint32_t>(deopt_context), hi_.Value<int32_t>(deopt_context));
|
|
}
|
|
|
|
private:
|
|
static const intptr_t kFieldWidth = kBitsPerWord / 2;
|
|
class LoRegister : public BitField<intptr_t, 0, kFieldWidth> { };
|
|
class HiRegister : public BitField<intptr_t, kFieldWidth, kFieldWidth> { };
|
|
|
|
const CpuRegisterSource lo_;
|
|
const CpuRegisterSource hi_;
|
|
|
|
DISALLOW_COPY_AND_ASSIGN(DeoptMintPairInstr);
|
|
};
|
|
|
|
|
|
template<DeoptInstr::Kind K, typename T>
|
|
class DeoptIntInstr : public DeoptIntegerInstrBase {
|
|
public:
|
|
explicit DeoptIntInstr(intptr_t source_index)
|
|
: DeoptIntegerInstrBase(), source_(source_index) {
|
|
}
|
|
|
|
explicit DeoptIntInstr(const CpuRegisterSource& source)
|
|
: DeoptIntegerInstrBase(), source_(source) {
|
|
}
|
|
|
|
virtual intptr_t source_index() const { return source_.source_index(); }
|
|
virtual DeoptInstr::Kind kind() const { return K; }
|
|
|
|
virtual const char* ArgumentsToCString() const {
|
|
return source_.ToCString();
|
|
}
|
|
|
|
virtual int64_t GetValue(DeoptContext* deopt_context) {
|
|
return static_cast<int64_t>(source_.Value<T>(deopt_context));
|
|
}
|
|
|
|
private:
|
|
const CpuRegisterSource source_;
|
|
|
|
DISALLOW_COPY_AND_ASSIGN(DeoptIntInstr);
|
|
};
|
|
|
|
|
|
typedef DeoptIntInstr<DeoptInstr::kUint32, uint32_t> DeoptUint32Instr;
|
|
typedef DeoptIntInstr<DeoptInstr::kInt32, int32_t> DeoptInt32Instr;
|
|
typedef DeoptIntInstr<DeoptInstr::kMint, int64_t> DeoptMintInstr;
|
|
|
|
|
|
template<DeoptInstr::Kind K,
|
|
typename Type,
|
|
typename RawObjectType>
|
|
class DeoptFpuInstr: public DeoptInstr {
|
|
public:
|
|
explicit DeoptFpuInstr(intptr_t source_index)
|
|
: source_(source_index) {}
|
|
|
|
explicit DeoptFpuInstr(const FpuRegisterSource& source)
|
|
: source_(source) {}
|
|
|
|
virtual intptr_t source_index() const { return source_.source_index(); }
|
|
virtual DeoptInstr::Kind kind() const { return K; }
|
|
|
|
virtual const char* ArgumentsToCString() const {
|
|
return source_.ToCString();
|
|
}
|
|
|
|
void Execute(DeoptContext* deopt_context, intptr_t* dest_addr) {
|
|
*dest_addr = Smi::RawValue(0);
|
|
deopt_context->DeferMaterialization(
|
|
source_.Value<Type>(deopt_context),
|
|
reinterpret_cast<RawObjectType**>(dest_addr));
|
|
}
|
|
|
|
private:
|
|
const FpuRegisterSource source_;
|
|
|
|
DISALLOW_COPY_AND_ASSIGN(DeoptFpuInstr);
|
|
};
|
|
|
|
typedef DeoptFpuInstr<DeoptInstr::kDouble, double, RawDouble> DeoptDoubleInstr;
|
|
|
|
// Simd128 types.
|
|
typedef DeoptFpuInstr<DeoptInstr::kFloat32x4, simd128_value_t, RawFloat32x4>
|
|
DeoptFloat32x4Instr;
|
|
typedef DeoptFpuInstr<DeoptInstr::kFloat32x4, simd128_value_t, RawFloat32x4>
|
|
DeoptFloat32x4Instr;
|
|
typedef DeoptFpuInstr<DeoptInstr::kFloat64x2, simd128_value_t, RawFloat64x2>
|
|
DeoptFloat64x2Instr;
|
|
typedef DeoptFpuInstr<DeoptInstr::kInt32x4, simd128_value_t, RawInt32x4>
|
|
DeoptInt32x4Instr;
|
|
|
|
// Deoptimization instruction creating a PC marker for the code of
|
|
// function at 'object_table_index'.
|
|
class DeoptPcMarkerInstr : public DeoptInstr {
|
|
public:
|
|
explicit DeoptPcMarkerInstr(intptr_t object_table_index)
|
|
: object_table_index_(object_table_index) {
|
|
ASSERT(object_table_index >= 0);
|
|
}
|
|
|
|
virtual intptr_t source_index() const { return object_table_index_; }
|
|
virtual DeoptInstr::Kind kind() const { return kPcMarker; }
|
|
|
|
virtual const char* ArgumentsToCString() const {
|
|
return Thread::Current()->zone()->PrintToString(
|
|
"%" Pd "", object_table_index_);
|
|
}
|
|
|
|
void Execute(DeoptContext* deopt_context, intptr_t* dest_addr) {
|
|
*dest_addr = Smi::RawValue(0);
|
|
deopt_context->DeferPcMarkerMaterialization(
|
|
object_table_index_, dest_addr);
|
|
}
|
|
|
|
private:
|
|
intptr_t object_table_index_;
|
|
|
|
DISALLOW_COPY_AND_ASSIGN(DeoptPcMarkerInstr);
|
|
};
|
|
|
|
|
|
// Deoptimization instruction creating a pool pointer for the code of
|
|
// function at 'object_table_index'.
|
|
class DeoptPpInstr : public DeoptInstr {
|
|
public:
|
|
explicit DeoptPpInstr(intptr_t object_table_index)
|
|
: object_table_index_(object_table_index) {
|
|
ASSERT(object_table_index >= 0);
|
|
}
|
|
|
|
virtual intptr_t source_index() const { return object_table_index_; }
|
|
virtual DeoptInstr::Kind kind() const { return kPp; }
|
|
|
|
virtual const char* ArgumentsToCString() const {
|
|
return Thread::Current()->zone()->PrintToString(
|
|
"%" Pd "", object_table_index_);
|
|
}
|
|
|
|
void Execute(DeoptContext* deopt_context, intptr_t* dest_addr) {
|
|
*dest_addr = Smi::RawValue(0);
|
|
deopt_context->DeferPpMaterialization(object_table_index_,
|
|
reinterpret_cast<RawObject**>(dest_addr));
|
|
}
|
|
|
|
private:
|
|
intptr_t object_table_index_;
|
|
|
|
DISALLOW_COPY_AND_ASSIGN(DeoptPpInstr);
|
|
};
|
|
|
|
|
|
// Deoptimization instruction copying the caller saved FP from optimized frame.
|
|
class DeoptCallerFpInstr : public DeoptInstr {
|
|
public:
|
|
DeoptCallerFpInstr() {}
|
|
|
|
virtual intptr_t source_index() const { return 0; }
|
|
virtual DeoptInstr::Kind kind() const { return kCallerFp; }
|
|
|
|
void Execute(DeoptContext* deopt_context, intptr_t* dest_addr) {
|
|
*dest_addr = deopt_context->GetCallerFp();
|
|
deopt_context->SetCallerFp(reinterpret_cast<intptr_t>(
|
|
dest_addr - (kSavedCallerFpSlotFromFp * kWordSize)));
|
|
}
|
|
|
|
private:
|
|
DISALLOW_COPY_AND_ASSIGN(DeoptCallerFpInstr);
|
|
};
|
|
|
|
|
|
// Deoptimization instruction copying the caller saved PP from optimized frame.
|
|
class DeoptCallerPpInstr : public DeoptInstr {
|
|
public:
|
|
DeoptCallerPpInstr() {}
|
|
|
|
virtual intptr_t source_index() const { return 0; }
|
|
virtual DeoptInstr::Kind kind() const { return kCallerPp; }
|
|
|
|
void Execute(DeoptContext* deopt_context, intptr_t* dest_addr) {
|
|
*dest_addr = deopt_context->GetSourcePp();
|
|
}
|
|
|
|
private:
|
|
DISALLOW_COPY_AND_ASSIGN(DeoptCallerPpInstr);
|
|
};
|
|
|
|
|
|
// Deoptimization instruction copying the caller return address from optimized
|
|
// frame.
|
|
class DeoptCallerPcInstr : public DeoptInstr {
|
|
public:
|
|
DeoptCallerPcInstr() {}
|
|
|
|
virtual intptr_t source_index() const { return 0; }
|
|
virtual DeoptInstr::Kind kind() const { return kCallerPc; }
|
|
|
|
void Execute(DeoptContext* deopt_context, intptr_t* dest_addr) {
|
|
*dest_addr = deopt_context->GetSourcePc();
|
|
}
|
|
|
|
private:
|
|
DISALLOW_COPY_AND_ASSIGN(DeoptCallerPcInstr);
|
|
};
|
|
|
|
|
|
// Write reference to a materialized object with the given index into the
|
|
// stack slot.
|
|
class DeoptMaterializedObjectRefInstr : public DeoptInstr {
|
|
public:
|
|
explicit DeoptMaterializedObjectRefInstr(intptr_t index)
|
|
: index_(index) {
|
|
ASSERT(index >= 0);
|
|
}
|
|
|
|
virtual intptr_t source_index() const { return index_; }
|
|
virtual DeoptInstr::Kind kind() const { return kMaterializedObjectRef; }
|
|
|
|
virtual const char* ArgumentsToCString() const {
|
|
return Thread::Current()->zone()->PrintToString(
|
|
"#%" Pd "", index_);
|
|
}
|
|
|
|
void Execute(DeoptContext* deopt_context, intptr_t* dest_addr) {
|
|
*reinterpret_cast<RawSmi**>(dest_addr) = Smi::New(0);
|
|
deopt_context->DeferMaterializedObjectRef(
|
|
index_, dest_addr);
|
|
}
|
|
|
|
private:
|
|
intptr_t index_;
|
|
|
|
DISALLOW_COPY_AND_ASSIGN(DeoptMaterializedObjectRefInstr);
|
|
};
|
|
|
|
|
|
// Materialize object with the given number of fields.
|
|
// Arguments for materialization (class and field-value pairs) are pushed
|
|
// to the expression stack of the bottom-most frame.
|
|
class DeoptMaterializeObjectInstr : public DeoptInstr {
|
|
public:
|
|
explicit DeoptMaterializeObjectInstr(intptr_t field_count)
|
|
: field_count_(field_count) {
|
|
ASSERT(field_count >= 0);
|
|
}
|
|
|
|
virtual intptr_t source_index() const { return field_count_; }
|
|
virtual DeoptInstr::Kind kind() const { return kMaterializeObject; }
|
|
|
|
virtual const char* ArgumentsToCString() const {
|
|
return Thread::Current()->zone()->PrintToString(
|
|
"%" Pd "", field_count_);
|
|
}
|
|
|
|
void Execute(DeoptContext* deopt_context, intptr_t* dest_addr) {
|
|
// This instructions are executed manually by the DeoptimizeWithDeoptInfo.
|
|
UNREACHABLE();
|
|
}
|
|
|
|
private:
|
|
intptr_t field_count_;
|
|
|
|
DISALLOW_COPY_AND_ASSIGN(DeoptMaterializeObjectInstr);
|
|
};
|
|
|
|
|
|
uword DeoptInstr::GetRetAddress(DeoptInstr* instr,
|
|
const Array& object_table,
|
|
Code* code) {
|
|
ASSERT(instr->kind() == kRetAddress);
|
|
DeoptRetAddressInstr* ret_address_instr =
|
|
static_cast<DeoptRetAddressInstr*>(instr);
|
|
// The following assert may trigger when displaying a backtrace
|
|
// from the simulator.
|
|
ASSERT(Isolate::IsDeoptAfter(ret_address_instr->deopt_id()));
|
|
ASSERT(!object_table.IsNull());
|
|
Function& function = Function::Handle();
|
|
function ^= object_table.At(ret_address_instr->object_table_index());
|
|
ASSERT(code != NULL);
|
|
Compiler::EnsureUnoptimizedCode(Thread::Current(), function);
|
|
*code ^= function.unoptimized_code();
|
|
ASSERT(!code->IsNull());
|
|
uword res = code->GetPcForDeoptId(ret_address_instr->deopt_id(),
|
|
RawPcDescriptors::kDeopt);
|
|
ASSERT(res != 0);
|
|
return res;
|
|
}
|
|
|
|
|
|
DeoptInstr* DeoptInstr::Create(intptr_t kind_as_int, intptr_t source_index) {
|
|
Kind kind = static_cast<Kind>(kind_as_int);
|
|
switch (kind) {
|
|
case kWord:
|
|
return new DeoptWordInstr(source_index);
|
|
case kDouble:
|
|
return new DeoptDoubleInstr(source_index);
|
|
case kMint:
|
|
return new DeoptMintInstr(source_index);
|
|
case kMintPair:
|
|
return new DeoptMintPairInstr(source_index);
|
|
case kInt32:
|
|
return new DeoptInt32Instr(source_index);
|
|
case kUint32:
|
|
return new DeoptUint32Instr(source_index);
|
|
case kFloat32x4:
|
|
return new DeoptFloat32x4Instr(source_index);
|
|
case kFloat64x2:
|
|
return new DeoptFloat64x2Instr(source_index);
|
|
case kInt32x4:
|
|
return new DeoptInt32x4Instr(source_index);
|
|
case kRetAddress:
|
|
return new DeoptRetAddressInstr(source_index);
|
|
case kConstant:
|
|
return new DeoptConstantInstr(source_index);
|
|
case kPcMarker:
|
|
return new DeoptPcMarkerInstr(source_index);
|
|
case kPp:
|
|
return new DeoptPpInstr(source_index);
|
|
case kCallerFp:
|
|
return new DeoptCallerFpInstr();
|
|
case kCallerPp:
|
|
return new DeoptCallerPpInstr();
|
|
case kCallerPc:
|
|
return new DeoptCallerPcInstr();
|
|
case kMaterializedObjectRef:
|
|
return new DeoptMaterializedObjectRefInstr(source_index);
|
|
case kMaterializeObject:
|
|
return new DeoptMaterializeObjectInstr(source_index);
|
|
}
|
|
UNREACHABLE();
|
|
return NULL;
|
|
}
|
|
|
|
|
|
const char* DeoptInstr::KindToCString(Kind kind) {
|
|
switch (kind) {
|
|
case kWord:
|
|
return "word";
|
|
case kDouble:
|
|
return "double";
|
|
case kMint:
|
|
case kMintPair:
|
|
return "mint";
|
|
case kInt32:
|
|
return "int32";
|
|
case kUint32:
|
|
return "uint32";
|
|
case kFloat32x4:
|
|
return "float32x4";
|
|
case kFloat64x2:
|
|
return "float64x2";
|
|
case kInt32x4:
|
|
return "int32x4";
|
|
case kRetAddress:
|
|
return "retaddr";
|
|
case kConstant:
|
|
return "const";
|
|
case kPcMarker:
|
|
return "pc";
|
|
case kPp:
|
|
return "pp";
|
|
case kCallerFp:
|
|
return "callerfp";
|
|
case kCallerPp:
|
|
return "callerpp";
|
|
case kCallerPc:
|
|
return "callerpc";
|
|
case kMaterializedObjectRef:
|
|
return "ref";
|
|
case kMaterializeObject:
|
|
return "mat";
|
|
}
|
|
UNREACHABLE();
|
|
return NULL;
|
|
}
|
|
|
|
|
|
class DeoptInfoBuilder::TrieNode : public ZoneAllocated {
|
|
public:
|
|
// Construct the root node representing the implicit "shared" terminator
|
|
// at the end of each deopt info.
|
|
TrieNode() : instruction_(NULL), info_number_(-1), children_(16) { }
|
|
|
|
// Construct a node representing a written instruction.
|
|
TrieNode(DeoptInstr* instruction, intptr_t info_number)
|
|
: instruction_(instruction), info_number_(info_number), children_(4) { }
|
|
|
|
intptr_t info_number() const { return info_number_; }
|
|
|
|
void AddChild(TrieNode* child) {
|
|
if (child != NULL) children_.Add(child);
|
|
}
|
|
|
|
TrieNode* FindChild(const DeoptInstr& instruction) {
|
|
for (intptr_t i = 0; i < children_.length(); ++i) {
|
|
TrieNode* child = children_[i];
|
|
if (child->instruction_->Equals(instruction)) return child;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
private:
|
|
const DeoptInstr* instruction_; // Instruction that was written.
|
|
const intptr_t info_number_; // Index of the deopt info it was written to.
|
|
|
|
GrowableArray<TrieNode*> children_;
|
|
};
|
|
|
|
|
|
DeoptInfoBuilder::DeoptInfoBuilder(Zone* zone,
|
|
const intptr_t num_args,
|
|
Assembler* assembler)
|
|
: zone_(zone),
|
|
instructions_(),
|
|
num_args_(num_args),
|
|
assembler_(assembler),
|
|
trie_root_(new(zone) TrieNode()),
|
|
current_info_number_(0),
|
|
frame_start_(-1),
|
|
materializations_() {
|
|
}
|
|
|
|
|
|
intptr_t DeoptInfoBuilder::FindOrAddObjectInTable(const Object& obj) const {
|
|
return assembler_->object_pool().FindObject(obj, kNotPatchable);
|
|
}
|
|
|
|
|
|
intptr_t DeoptInfoBuilder::CalculateStackIndex(
|
|
const Location& source_loc) const {
|
|
return source_loc.stack_index() < 0 ?
|
|
source_loc.stack_index() + num_args_ :
|
|
source_loc.stack_index() + num_args_ + kDartFrameFixedSize;
|
|
}
|
|
|
|
|
|
CpuRegisterSource DeoptInfoBuilder::ToCpuRegisterSource(const Location& loc) {
|
|
if (loc.IsRegister()) {
|
|
return CpuRegisterSource(CpuRegisterSource::kRegister, loc.reg());
|
|
} else {
|
|
ASSERT(loc.IsStackSlot());
|
|
return CpuRegisterSource(
|
|
CpuRegisterSource::kStackSlot, CalculateStackIndex(loc));
|
|
}
|
|
}
|
|
|
|
|
|
FpuRegisterSource DeoptInfoBuilder::ToFpuRegisterSource(
|
|
const Location& loc,
|
|
Location::Kind stack_slot_kind) {
|
|
if (loc.IsFpuRegister()) {
|
|
return FpuRegisterSource(FpuRegisterSource::kRegister, loc.fpu_reg());
|
|
} else {
|
|
ASSERT((stack_slot_kind == Location::kQuadStackSlot) ||
|
|
(stack_slot_kind == Location::kDoubleStackSlot));
|
|
ASSERT(loc.kind() == stack_slot_kind);
|
|
return FpuRegisterSource(
|
|
FpuRegisterSource::kStackSlot, CalculateStackIndex(loc));
|
|
}
|
|
}
|
|
|
|
void DeoptInfoBuilder::AddReturnAddress(const Function& function,
|
|
intptr_t deopt_id,
|
|
intptr_t dest_index) {
|
|
const intptr_t object_table_index = FindOrAddObjectInTable(function);
|
|
ASSERT(dest_index == FrameSize());
|
|
instructions_.Add(
|
|
new(zone()) DeoptRetAddressInstr(object_table_index, deopt_id));
|
|
}
|
|
|
|
|
|
void DeoptInfoBuilder::AddPcMarker(const Function& function,
|
|
intptr_t dest_index) {
|
|
intptr_t object_table_index = FindOrAddObjectInTable(function);
|
|
ASSERT(dest_index == FrameSize());
|
|
instructions_.Add(new(zone()) DeoptPcMarkerInstr(object_table_index));
|
|
}
|
|
|
|
|
|
void DeoptInfoBuilder::AddPp(const Function& function,
|
|
intptr_t dest_index) {
|
|
intptr_t object_table_index = FindOrAddObjectInTable(function);
|
|
ASSERT(dest_index == FrameSize());
|
|
instructions_.Add(new(zone()) DeoptPpInstr(object_table_index));
|
|
}
|
|
|
|
|
|
void DeoptInfoBuilder::AddCopy(Value* value,
|
|
const Location& source_loc,
|
|
const intptr_t dest_index) {
|
|
DeoptInstr* deopt_instr = NULL;
|
|
if (source_loc.IsConstant()) {
|
|
intptr_t object_table_index = FindOrAddObjectInTable(source_loc.constant());
|
|
deopt_instr = new(zone()) DeoptConstantInstr(object_table_index);
|
|
} else if (source_loc.IsInvalid() &&
|
|
value->definition()->IsMaterializeObject()) {
|
|
const intptr_t index = FindMaterialization(
|
|
value->definition()->AsMaterializeObject());
|
|
ASSERT(index >= 0);
|
|
deopt_instr = new(zone()) DeoptMaterializedObjectRefInstr(index);
|
|
} else {
|
|
ASSERT(!source_loc.IsInvalid());
|
|
switch (value->definition()->representation()) {
|
|
case kTagged:
|
|
deopt_instr = new(zone()) DeoptWordInstr(
|
|
ToCpuRegisterSource(source_loc));
|
|
break;
|
|
case kUnboxedMint: {
|
|
if (source_loc.IsPairLocation()) {
|
|
PairLocation* pair = source_loc.AsPairLocation();
|
|
deopt_instr = new(zone()) DeoptMintPairInstr(
|
|
ToCpuRegisterSource(pair->At(0)),
|
|
ToCpuRegisterSource(pair->At(1)));
|
|
} else {
|
|
ASSERT(!source_loc.IsPairLocation());
|
|
deopt_instr = new(zone()) DeoptMintInstr(
|
|
ToCpuRegisterSource(source_loc));
|
|
}
|
|
break;
|
|
}
|
|
case kUnboxedInt32:
|
|
deopt_instr = new(zone()) DeoptInt32Instr(
|
|
ToCpuRegisterSource(source_loc));
|
|
break;
|
|
case kUnboxedUint32:
|
|
deopt_instr = new(zone()) DeoptUint32Instr(
|
|
ToCpuRegisterSource(source_loc));
|
|
break;
|
|
case kUnboxedDouble:
|
|
deopt_instr = new(zone()) DeoptDoubleInstr(
|
|
ToFpuRegisterSource(source_loc, Location::kDoubleStackSlot));
|
|
break;
|
|
case kUnboxedFloat32x4:
|
|
deopt_instr = new(zone()) DeoptFloat32x4Instr(
|
|
ToFpuRegisterSource(source_loc, Location::kQuadStackSlot));
|
|
break;
|
|
case kUnboxedFloat64x2:
|
|
deopt_instr = new(zone()) DeoptFloat64x2Instr(
|
|
ToFpuRegisterSource(source_loc, Location::kQuadStackSlot));
|
|
break;
|
|
case kUnboxedInt32x4:
|
|
deopt_instr = new(zone()) DeoptInt32x4Instr(
|
|
ToFpuRegisterSource(source_loc, Location::kQuadStackSlot));
|
|
break;
|
|
default:
|
|
UNREACHABLE();
|
|
break;
|
|
}
|
|
}
|
|
ASSERT(dest_index == FrameSize());
|
|
ASSERT(deopt_instr != NULL);
|
|
instructions_.Add(deopt_instr);
|
|
}
|
|
|
|
|
|
void DeoptInfoBuilder::AddCallerFp(intptr_t dest_index) {
|
|
ASSERT(dest_index == FrameSize());
|
|
instructions_.Add(new(zone()) DeoptCallerFpInstr());
|
|
}
|
|
|
|
|
|
void DeoptInfoBuilder::AddCallerPp(intptr_t dest_index) {
|
|
ASSERT(dest_index == FrameSize());
|
|
instructions_.Add(new(zone()) DeoptCallerPpInstr());
|
|
}
|
|
|
|
|
|
void DeoptInfoBuilder::AddCallerPc(intptr_t dest_index) {
|
|
ASSERT(dest_index == FrameSize());
|
|
instructions_.Add(new(zone()) DeoptCallerPcInstr());
|
|
}
|
|
|
|
|
|
void DeoptInfoBuilder::AddConstant(const Object& obj, intptr_t dest_index) {
|
|
ASSERT(dest_index == FrameSize());
|
|
intptr_t object_table_index = FindOrAddObjectInTable(obj);
|
|
instructions_.Add(new(zone()) DeoptConstantInstr(object_table_index));
|
|
}
|
|
|
|
|
|
void DeoptInfoBuilder::AddMaterialization(MaterializeObjectInstr* mat) {
|
|
const intptr_t index = FindMaterialization(mat);
|
|
if (index >= 0) {
|
|
return; // Already added.
|
|
}
|
|
materializations_.Add(mat);
|
|
|
|
// Count initialized fields and emit kMaterializeObject instruction.
|
|
// There is no need to write nulls into fields because object is null
|
|
// initialized by default.
|
|
intptr_t non_null_fields = 0;
|
|
for (intptr_t i = 0; i < mat->InputCount(); i++) {
|
|
if (!mat->InputAt(i)->BindsToConstantNull()) {
|
|
non_null_fields++;
|
|
}
|
|
}
|
|
|
|
instructions_.Add(
|
|
new(zone()) DeoptMaterializeObjectInstr(non_null_fields));
|
|
|
|
for (intptr_t i = 0; i < mat->InputCount(); i++) {
|
|
MaterializeObjectInstr* nested_mat = mat->InputAt(i)->definition()->
|
|
AsMaterializeObject();
|
|
if (nested_mat != NULL) {
|
|
AddMaterialization(nested_mat);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
intptr_t DeoptInfoBuilder::EmitMaterializationArguments(intptr_t dest_index) {
|
|
ASSERT(dest_index == kDartFrameFixedSize);
|
|
for (intptr_t i = 0; i < materializations_.length(); i++) {
|
|
MaterializeObjectInstr* mat = materializations_[i];
|
|
// Class of the instance to allocate.
|
|
AddConstant(mat->cls(), dest_index++);
|
|
AddConstant(Smi::Handle(Smi::New(mat->num_variables())), dest_index++);
|
|
for (intptr_t i = 0; i < mat->InputCount(); i++) {
|
|
if (!mat->InputAt(i)->BindsToConstantNull()) {
|
|
// Emit offset-value pair.
|
|
AddConstant(Smi::Handle(Smi::New(mat->FieldOffsetAt(i))),
|
|
dest_index++);
|
|
AddCopy(mat->InputAt(i), mat->LocationAt(i), dest_index++);
|
|
}
|
|
}
|
|
}
|
|
return dest_index;
|
|
}
|
|
|
|
|
|
intptr_t DeoptInfoBuilder::FindMaterialization(
|
|
MaterializeObjectInstr* mat) const {
|
|
for (intptr_t i = 0; i < materializations_.length(); i++) {
|
|
if (materializations_[i] == mat) {
|
|
return i;
|
|
}
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
|
|
static uint8_t* ZoneReAlloc(uint8_t* ptr,
|
|
intptr_t old_size,
|
|
intptr_t new_size) {
|
|
return Isolate::Current()->current_zone()->Realloc<uint8_t>(
|
|
ptr, old_size, new_size);
|
|
}
|
|
|
|
|
|
RawTypedData* DeoptInfoBuilder::CreateDeoptInfo(const Array& deopt_table) {
|
|
intptr_t length = instructions_.length();
|
|
|
|
// Count the number of instructions that are a shared suffix of some deopt
|
|
// info already written.
|
|
TrieNode* suffix = trie_root_;
|
|
intptr_t suffix_length = 0;
|
|
if (FLAG_compress_deopt_info) {
|
|
for (intptr_t i = length - 1; i >= 0; --i) {
|
|
TrieNode* node = suffix->FindChild(*instructions_[i]);
|
|
if (node == NULL) break;
|
|
suffix = node;
|
|
++suffix_length;
|
|
}
|
|
}
|
|
|
|
|
|
// Allocate space for the translation. If the shared suffix is longer
|
|
// than one instruction, we replace it with a single suffix instruction.
|
|
const bool use_suffix = suffix_length > 1;
|
|
if (use_suffix) {
|
|
length -= (suffix_length - 1);
|
|
}
|
|
|
|
uint8_t* buffer;
|
|
typedef WriteStream::Raw<sizeof(intptr_t), intptr_t> Writer;
|
|
WriteStream stream(&buffer, ZoneReAlloc, 2 * length * kWordSize);
|
|
|
|
Writer::Write(&stream, FrameSize());
|
|
|
|
if (use_suffix) {
|
|
Writer::Write(&stream, suffix_length);
|
|
Writer::Write(&stream, suffix->info_number());
|
|
} else {
|
|
Writer::Write(&stream, 0);
|
|
}
|
|
|
|
// Write the unshared instructions and build their sub-tree.
|
|
TrieNode* node = use_suffix ? suffix : trie_root_;
|
|
const intptr_t write_count = use_suffix ? length - 1 : length;
|
|
for (intptr_t i = write_count - 1; i >= 0; --i) {
|
|
DeoptInstr* instr = instructions_[i];
|
|
Writer::Write(&stream, instr->kind());
|
|
Writer::Write(&stream, instr->source_index());
|
|
|
|
TrieNode* child = new(zone()) TrieNode(instr, current_info_number_);
|
|
node->AddChild(child);
|
|
node = child;
|
|
}
|
|
|
|
const TypedData& deopt_info = TypedData::Handle(zone(), TypedData::New(
|
|
kTypedDataUint8ArrayCid, stream.bytes_written(), Heap::kOld));
|
|
{
|
|
NoSafepointScope no_safepoint;
|
|
memmove(deopt_info.DataAddr(0),
|
|
stream.buffer(),
|
|
stream.bytes_written());
|
|
}
|
|
|
|
ASSERT(DeoptInfo::VerifyDecompression(
|
|
instructions_, deopt_table, deopt_info));
|
|
instructions_.Clear();
|
|
materializations_.Clear();
|
|
frame_start_ = -1;
|
|
|
|
++current_info_number_;
|
|
return deopt_info.raw();
|
|
}
|
|
|
|
|
|
intptr_t DeoptTable::SizeFor(intptr_t length) {
|
|
return length * kEntrySize;
|
|
}
|
|
|
|
void DeoptTable::SetEntry(const Array& table,
|
|
intptr_t index,
|
|
const Smi& offset,
|
|
const TypedData& info,
|
|
const Smi& reason) {
|
|
ASSERT((table.Length() % kEntrySize) == 0);
|
|
intptr_t i = index * kEntrySize;
|
|
table.SetAt(i, offset);
|
|
table.SetAt(i + 1, info);
|
|
table.SetAt(i + 2, reason);
|
|
}
|
|
|
|
|
|
intptr_t DeoptTable::GetLength(const Array& table) {
|
|
ASSERT((table.Length() % kEntrySize) == 0);
|
|
return table.Length() / kEntrySize;
|
|
}
|
|
|
|
|
|
void DeoptTable::GetEntry(const Array& table,
|
|
intptr_t index,
|
|
Smi* offset,
|
|
TypedData* info,
|
|
Smi* reason) {
|
|
intptr_t i = index * kEntrySize;
|
|
*offset ^= table.At(i);
|
|
*info ^= table.At(i + 1);
|
|
*reason ^= table.At(i + 2);
|
|
}
|
|
|
|
} // namespace dart
|