[runtime] Unify and simplify how frames are marked

src/arm64/deoptimizer-arm64.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/arm64/frames-arm64.h"
 #include "src/codegen.h"
 #include "src/deoptimizer.h"
 #include "src/full-codegen/full-codegen.h"
 #include "src/register-configuration.h"
 #include "src/safepoint-table.h"
@@ skipping 113 matching lines @@
   Register fp_to_sp = x4;
   // Get the address of the location in the code object. This is the return
   // address for lazy deoptimization.
   __ Mov(code_object, lr);
   // Compute the fp-to-sp delta, and correct one word for bailout id.
   __ Add(fp_to_sp, masm()->StackPointer(),
          kSavedRegistersAreaSize + (1 * kPointerSize));
   __ Sub(fp_to_sp, fp, fp_to_sp);
 
   // Allocate a new deoptimizer object.
+  __ Mov(x0, 0);
+  Label context_check;
+  __ Ldr(x1, MemOperand(fp, CommonFrameConstants::kContextOrFrameTypeOffset));
+  __ JumpIfSmi(x1, &context_check);
   __ Ldr(x0, MemOperand(fp, JavaScriptFrameConstants::kFunctionOffset));
+  __ bind(&context_check);
   __ Mov(x1, type());
   // Following arguments are already loaded:
   //  - x2: bailout id
   //  - x3: code object address
   //  - x4: fp-to-sp delta
   __ Mov(x5, ExternalReference::isolate_address(isolate()));
 
   {
     // Call Deoptimizer::New().
     AllowExternalCallThatCantCauseGC scope(masm());
@@ skipping 185 matching lines @@
 void FrameDescription::SetCallerConstantPool(unsigned offset, intptr_t value) {
   // No embedded constant pool support.
   UNREACHABLE();
 }
 
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8