Emit unwinding information for TurboFan code.

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

Index: src/compiler/arm/code-generator-arm.cc
diff --git a/src/compiler/arm/code-generator-arm.cc b/src/compiler/arm/code-generator-arm.cc
index c9192e44634c301d4fc9ce6754ca647bf42bf994..c94859de45a48ead688305ec4d31efee566c37bf 100644
--- a/src/compiler/arm/code-generator-arm.cc
+++ b/src/compiler/arm/code-generator-arm.cc
@@ -188,7 +188,8 @@ class OutOfLineRecordWrite final : public OutOfLineCode {
  public:
   OutOfLineRecordWrite(CodeGenerator* gen, Register object, Register index,
                        Register value, Register scratch0, Register scratch1,
-                       RecordWriteMode mode)
+                       RecordWriteMode mode,
+                       UnwindingInfoWriter* unwinding_info_writer)
       : OutOfLineCode(gen),
         object_(object),
         index_(index),
@@ -197,11 +198,13 @@ 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) {}
 
   OutOfLineRecordWrite(CodeGenerator* gen, Register object, int32_t index,
                        Register value, Register scratch0, Register scratch1,
-                       RecordWriteMode mode)
+                       RecordWriteMode mode,
+                       UnwindingInfoWriter* unwinding_info_writer)
       : OutOfLineCode(gen),
         object_(object),
         index_(no_reg),
@@ -210,7 +213,8 @@ 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) {
@@ -227,6 +231,7 @@ class OutOfLineRecordWrite final : public OutOfLineCode {
     if (must_save_lr_) {
       // We need to save and restore lr if the frame was elided.
       __ Push(lr);
+      unwinding_info_writer_->MarkLinkRegisterOnTopOfStack(__ pc_offset());
     }
     RecordWriteStub stub(isolate(), object_, scratch0_, scratch1_,
                          remembered_set_action, save_fp_mode);
@@ -239,6 +244,7 @@ class OutOfLineRecordWrite final : public OutOfLineCode {
     __ CallStub(&stub);
     if (must_save_lr_) {
       __ Pop(lr);
+      unwinding_info_writer_->MarkPopLinkRegisterFromTopOfStack(__ pc_offset());
     }
   }
 
@@ -251,6 +257,7 @@ class OutOfLineRecordWrite final : public OutOfLineCode {
   Register const scratch1_;
   RecordWriteMode const mode_;
   bool must_save_lr_;
+  UnwindingInfoWriter* const unwinding_info_writer_;
 };
 
 
@@ -413,6 +420,7 @@ Condition FlagsConditionToCondition(FlagsCondition condition) {
 
 void CodeGenerator::AssembleDeconstructFrame() {
   __ LeaveFrame(StackFrame::MANUAL);
+  unwinding_info_writer_.MarkFrameDeconstructed(__ pc_offset());
 }
 
 void CodeGenerator::AssemblePrepareTailCall() {
@@ -600,6 +608,7 @@ CodeGenerator::CodeGenResult CodeGenerator::AssembleArchInstruction(
         __ Jump(ip);
       }
       DCHECK_EQ(LeaveCC, i.OutputSBit());
+      unwinding_info_writer_.MarkBlockWillExit();
       frame_access_state()->ClearSPDelta();
       frame_access_state()->SetFrameAccessToDefault();
       break;
@@ -607,6 +616,7 @@ CodeGenerator::CodeGenResult CodeGenerator::AssembleArchInstruction(
     case kArchTailCallAddress: {
       CHECK(!instr->InputAt(0)->IsImmediate());
       __ Jump(i.InputRegister(0));
+      unwinding_info_writer_.MarkBlockWillExit();
       frame_access_state()->ClearSPDelta();
       frame_access_state()->SetFrameAccessToDefault();
       break;
@@ -742,14 +752,16 @@ CodeGenerator::CodeGenResult CodeGenerator::AssembleArchInstruction(
           AddressingModeField::decode(instr->opcode());
       if (addressing_mode == kMode_Offset_RI) {
         int32_t index = i.InputInt32(1);
-        ool = new (zone()) OutOfLineRecordWrite(this, object, index, value,
-                                                scratch0, scratch1, mode);
+        ool = new (zone())
+            OutOfLineRecordWrite(this, object, index, value, scratch0, scratch1,
+                                 mode, &unwinding_info_writer_);
         __ str(value, MemOperand(object, index));
       } else {
         DCHECK_EQ(kMode_Offset_RR, addressing_mode);
         Register index(i.InputRegister(1));
-        ool = new (zone()) OutOfLineRecordWrite(this, object, index, value,
-                                                scratch0, scratch1, mode);
+        ool = new (zone())
+            OutOfLineRecordWrite(this, object, index, value, scratch0, scratch1,
+                                 mode, &unwinding_info_writer_);
         __ str(value, MemOperand(object, index));
       }
       __ CheckPageFlag(object, scratch0,
@@ -1602,6 +1614,10 @@ void CodeGenerator::AssembleConstructFrame() {
     } else {
       __ StubPrologue(info()->GetOutputStackFrameType());
     }
+
+    if (!info()->GeneratePreagedPrologue()) {
+      unwinding_info_writer_.MarkFrameConstructed(__ pc_offset());
+    }
   }
 
   int shrink_slots = frame()->GetSpillSlotCount();
@@ -1665,6 +1681,8 @@ void CodeGenerator::AssembleReturn() {
             DwVfpRegister::from_code(last));
   }
 
+  unwinding_info_writer_.MarkBlockWillExit();
+
   if (descriptor->IsCFunctionCall()) {
     AssembleDeconstructFrame();
   } else if (frame_access_state()->has_frame()) {