[runtime] Unify and simplify how frames are marked

src/debug/mips/debug-mips.cc

 // Copyright 2012 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.
 
 #if V8_TARGET_ARCH_MIPS
 
 #include "src/codegen.h"
 #include "src/debug/debug.h"
 
 namespace v8 {
@@ skipping 96 matching lines @@
   ExternalReference after_break_target =
       ExternalReference::debug_after_break_target_address(masm->isolate());
   __ li(t9, Operand(after_break_target));
   __ lw(t9, MemOperand(t9));
   __ Jump(t9);
 }
 
 
 void DebugCodegen::GenerateFrameDropperLiveEdit(MacroAssembler* masm) {
   // We do not know our frame height, but set sp based on fp.
-  __ Subu(sp, fp, Operand(kPointerSize));
+  __ lw(a1, MemOperand(fp, FrameDropperFrameConstants::kFunctionOffset));
 
-  __ Pop(ra, fp, a1);  // Return address, Frame, Function.
+  // Pop return address and frame.
+  __ LeaveFrame(StackFrame::INTERNAL);
 
   ParameterCount dummy(0);
   __ FloodFunctionIfStepping(a1, no_reg, dummy, dummy);
 
   // Load context from the function.
   __ lw(cp, FieldMemOperand(a1, JSFunction::kContextOffset));
 
   // Clear new.target as a safety measure.
   __ LoadRoot(a3, Heap::kUndefinedValueRootIndex);
 
   // Get function code.
   __ lw(at, FieldMemOperand(a1, JSFunction::kSharedFunctionInfoOffset));
   __ lw(at, FieldMemOperand(at, SharedFunctionInfo::kCodeOffset));
   __ Addu(t9, at, Operand(Code::kHeaderSize - kHeapObjectTag));
 
   // Re-run JSFunction, a1 is function, cp is context.
   __ Jump(t9);
 }
 
 
 const bool LiveEdit::kFrameDropperSupported = true;
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_MIPS