Emit unwinding information for TurboFan code.

src/compiler/arm64/code-generator-arm64.cc

Index: src/compiler/arm64/code-generator-arm64.cc
diff --git a/src/compiler/arm64/code-generator-arm64.cc b/src/compiler/arm64/code-generator-arm64.cc
index cda9ce1de2213da6ade888220e0a48abf6a0a6ec..1993a4613acde719b31970ff3e199505771ac608 100644
--- a/src/compiler/arm64/code-generator-arm64.cc
+++ b/src/compiler/arm64/code-generator-arm64.cc
@@ -303,7 +303,8 @@ class OutOfLineRecordWrite final : public OutOfLineCode {
  public:
   OutOfLineRecordWrite(CodeGenerator* gen, Register object, Operand index,
                        Register value, Register scratch0, Register scratch1,
-                       RecordWriteMode mode)
+                       RecordWriteMode mode,
+                       UnwindingInfoWriter* unwinding_info_writer)
       : OutOfLineCode(gen),
         object_(object),
         index_(index),
@@ -311,7 +312,8 @@ class OutOfLineRecordWrite final : public OutOfLineCode {
         scratch0_(scratch0),
         scratch1_(scratch1),
         mode_(mode),
-        must_save_lr_(!gen->frame_access_state()->has_frame()) {}
+        must_save_lr_(!gen->frame_access_state()->has_frame()),
+        unwinding_info_writer_(unwinding_info_writer) {}
 
   void Generate() final {
     if (mode_ > RecordWriteMode::kValueIsPointer) {
@@ -328,6 +330,9 @@ class OutOfLineRecordWrite final : public OutOfLineCode {
     if (must_save_lr_) {
       // We need to save and restore lr if the frame was elided.
       __ Push(lr);
+      if (unwinding_info_writer_) {
+        unwinding_info_writer_->MarkLinkRegisterOnTopOfStack(__ pc_offset());
+      }
     }
     RecordWriteStub stub(isolate(), object_, scratch0_, scratch1_,
                          remembered_set_action, save_fp_mode);
@@ -335,6 +340,10 @@ class OutOfLineRecordWrite final : public OutOfLineCode {
     __ CallStub(&stub);
     if (must_save_lr_) {
       __ Pop(lr);
+      if (unwinding_info_writer_) {
+        unwinding_info_writer_->MarkPopLinkRegisterFromTopOfStack(
+            __ pc_offset());
+      }
     }
   }
 
@@ -346,6 +355,7 @@ class OutOfLineRecordWrite final : public OutOfLineCode {
   Register const scratch1_;
   RecordWriteMode const mode_;
   bool must_save_lr_;
+  UnwindingInfoWriter* const unwinding_info_writer_;
 };
 
 
@@ -539,6 +549,10 @@ void CodeGenerator::AssembleDeconstructFrame() {
     __ Mov(jssp, fp);
   }
   __ Pop(fp, lr);
+
+  if (!unwinding_info_writer_.is_empty()) {
+    unwinding_info_writer_->MarkFrameDeconstructed(__ pc_offset());
+  }
 }
 
 void CodeGenerator::AssemblePrepareTailCall() {
@@ -654,6 +668,9 @@ CodeGenerator::CodeGenResult CodeGenerator::AssembleArchInstruction(
         __ Add(target, target, Code::kHeaderSize - kHeapObjectTag);
         __ Jump(target);
       }
+      if (!unwinding_info_writer_.is_empty()) {
+        unwinding_info_writer_->MarkBlockWillExit();
+      }
       frame_access_state()->ClearSPDelta();
       frame_access_state()->SetFrameAccessToDefault();
       break;
@@ -661,6 +678,9 @@ CodeGenerator::CodeGenResult CodeGenerator::AssembleArchInstruction(
     case kArchTailCallAddress: {
       CHECK(!instr->InputAt(0)->IsImmediate());
       __ Jump(i.InputRegister(0));
+      if (!unwinding_info_writer_.is_empty()) {
+        unwinding_info_writer_->MarkBlockWillExit();
+      }
       frame_access_state()->ClearSPDelta();
       frame_access_state()->SetFrameAccessToDefault();
       break;
@@ -805,8 +825,9 @@ CodeGenerator::CodeGenResult CodeGenerator::AssembleArchInstruction(
       Register value = i.InputRegister(2);
       Register scratch0 = i.TempRegister(0);
       Register scratch1 = i.TempRegister(1);
-      auto ool = new (zone()) OutOfLineRecordWrite(this, object, index, value,
-                                                   scratch0, scratch1, mode);
+      auto ool = new (zone())
+          OutOfLineRecordWrite(this, object, index, value, scratch0, scratch1,
+                               mode, unwinding_info_writer_.get());
       __ Str(value, MemOperand(object, index));
       __ CheckPageFlagSet(object, scratch0,
                           MemoryChunk::kPointersFromHereAreInterestingMask,
@@ -1793,6 +1814,11 @@ void CodeGenerator::AssembleConstructFrame() {
                         frame()->GetTotalFrameSlotCount());
       }
     }
+
+    if (!unwinding_info_writer_.is_empty() &&
+        !info()->GeneratePreagedPrologue()) {
+      unwinding_info_writer_->MarkFrameConstructed(__ pc_offset());
+    }
   }
 
   int shrink_slots = frame()->GetSpillSlotCount();
@@ -1852,6 +1878,10 @@ void CodeGenerator::AssembleReturn() {
     __ PopCPURegList(saves_fp);
   }
 
+  if (!unwinding_info_writer_.is_empty()) {
+    unwinding_info_writer_->MarkBlockWillExit();
+  }
+
   int pop_count = static_cast<int>(descriptor->StackParameterCount());
   if (descriptor->IsCFunctionCall()) {
     AssembleDeconstructFrame();