Switch full-codegen from StackHandlers to handler table.

src/arm64/full-codegen-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/v8.h"
 
 #if V8_TARGET_ARCH_ARM64
 
 #include "src/code-factory.h"
 #include "src/code-stubs.h"
@@ skipping 87 matching lines @@
 //   - cp: our context.
 //   - fp: our caller's frame pointer.
 //   - jssp: stack pointer.
 //   - lr: return address.
 //
 // The function builds a JS frame. See JavaScriptFrameConstants in
 // frames-arm.h for its layout.
 void FullCodeGenerator::Generate() {
   CompilationInfo* info = info_;
   handler_table_ =
-      isolate()->factory()->NewFixedArray(function()->handler_count(), TENURED);
+      Handle<HandlerTable>::cast(isolate()->factory()->NewFixedArray(
+          HandlerTable::LengthForRange(function()->handler_count()), TENURED));
 
   profiling_counter_ = isolate()->factory()->NewCell(
       Handle<Smi>(Smi::FromInt(FLAG_interrupt_budget), isolate()));
   SetFunctionPosition(function());
   Comment cmnt(masm_, "[ Function compiled by full code generator");
 
   ProfileEntryHookStub::MaybeCallEntryHook(masm_);
 
 #ifdef DEBUG
   if (strlen(FLAG_stop_at) > 0 &&
@@ skipping 4917 matching lines @@
       Label l_next, l_call, l_loop;
       Register load_receiver = LoadDescriptor::ReceiverRegister();
       Register load_name = LoadDescriptor::NameRegister();
 
       // Initial send value is undefined.
       __ LoadRoot(x0, Heap::kUndefinedValueRootIndex);
       __ B(&l_next);
 
       // catch (e) { receiver = iter; f = 'throw'; arg = e; goto l_call; }
       __ Bind(&l_catch);
-      handler_table()->set(expr->index(), Smi::FromInt(l_catch.pos()));
       __ LoadRoot(load_name, Heap::kthrow_stringRootIndex);  // "throw"
       __ Peek(x3, 1 * kPointerSize);                         // iter
       __ Push(load_name, x3, x0);                       // "throw", iter, except
       __ B(&l_call);
 
       // try { received = %yield result }
       // Shuffle the received result above a try handler and yield it without
       // re-boxing.
       __ Bind(&l_try);
       __ Pop(x0);                                        // result
-      __ PushTryHandler(StackHandler::CATCH, expr->index());
-      const int handler_size = StackHandlerConstants::kSize;
+      EnterTryBlock(expr->index(), &l_catch);
+      const int try_block_size = TryCatch::kElementCount * kPointerSize;
       __ Push(x0);                                       // result
       __ B(&l_suspend);
 
       // TODO(jbramley): This label is bound here because the following code
       // looks at its pos(). Is it possible to do something more efficient here,
       // perhaps using Adr?
       __ Bind(&l_continuation);
       __ B(&l_resume);
 
       __ Bind(&l_suspend);
-      const int generator_object_depth = kPointerSize + handler_size;
+      const int generator_object_depth = kPointerSize + try_block_size;
       __ Peek(x0, generator_object_depth);
       __ Push(x0);                                       // g
+      __ Push(Smi::FromInt(expr->index()));              // handler-index
       DCHECK((l_continuation.pos() > 0) && Smi::IsValid(l_continuation.pos()));
       __ Mov(x1, Smi::FromInt(l_continuation.pos()));
       __ Str(x1, FieldMemOperand(x0, JSGeneratorObject::kContinuationOffset));
       __ Str(cp, FieldMemOperand(x0, JSGeneratorObject::kContextOffset));
       __ Mov(x1, cp);
       __ RecordWriteField(x0, JSGeneratorObject::kContextOffset, x1, x2,
                           kLRHasBeenSaved, kDontSaveFPRegs);
-      __ CallRuntime(Runtime::kSuspendJSGeneratorObject, 1);
+      __ CallRuntime(Runtime::kSuspendJSGeneratorObject, 2);
       __ Ldr(cp, MemOperand(fp, StandardFrameConstants::kContextOffset));
       __ Pop(x0);                                        // result
       EmitReturnSequence();
       __ Bind(&l_resume);                                // received in x0
-      __ PopTryHandler();
+      ExitTryBlock(expr->index());
 
       // receiver = iter; f = 'next'; arg = received;
       __ Bind(&l_next);
 
       __ LoadRoot(load_name, Heap::knext_stringRootIndex);  // "next"
       __ Peek(x3, 1 * kPointerSize);                        // iter
       __ Push(load_name, x3, x0);                      // "next", iter, received
 
       // result = receiver[f](arg);
       __ Bind(&l_call);
@@ skipping 372 matching lines @@
       return OSR_AFTER_STACK_CHECK;
     } else {
       UNREACHABLE();
     }
   }
 
   return INTERRUPT;
 }
 
 
-#define __ ACCESS_MASM(masm())
-
-
-FullCodeGenerator::NestedStatement* FullCodeGenerator::TryFinally::Exit(
-    int* stack_depth,
-    int* context_length) {
-  ASM_LOCATION("FullCodeGenerator::TryFinally::Exit");
-  // The macros used here must preserve the result register.
-
-  // Because the handler block contains the context of the finally
-  // code, we can restore it directly from there for the finally code
-  // rather than iteratively unwinding contexts via their previous
-  // links.
-  __ Drop(*stack_depth);  // Down to the handler block.
-  if (*context_length > 0) {
-    // Restore the context to its dedicated register and the stack.
-    __ Peek(cp, StackHandlerConstants::kContextOffset);
-    __ Str(cp, MemOperand(fp, StandardFrameConstants::kContextOffset));
-  }
-  __ PopTryHandler();
-  __ Bl(finally_entry_);
-
-  *stack_depth = 0;
-  *context_length = 0;
-  return previous_;
-}
-
-
-#undef __
-
-
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM64