Replaces LongJump with LongJumpScope.

runtime/vm/code_descriptors_test.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "platform/assert.h"
 #include "vm/globals.h"
 
 #include "vm/ast.h"
 #include "vm/assembler.h"
 #include "vm/code_descriptors.h"
@@ skipping 31 matching lines @@
   test->node_sequence()->Add(new ReturnNode(kPos, l));
   l = new LiteralNode(kPos, Smi::ZoneHandle(Smi::New(3)));
   test->node_sequence()->Add(new ReturnNode(kPos, l));
   parsed_function->SetNodeSequence(test->node_sequence());
   parsed_function->set_instantiator(NULL);
   parsed_function->set_default_parameter_values(Object::null_array());
   parsed_function->AllocateVariables();
   bool retval;
   Isolate* isolate = Isolate::Current();
   EXPECT(isolate != NULL);
-  LongJump* base = isolate->long_jump_base();
-  LongJump jump;
-  isolate->set_long_jump_base(&jump);
+  LongJumpScope jump;
   if (setjmp(*jump.Set()) == 0) {
     // Build a stackmap table and some stackmap table entries.
     const intptr_t kStackSlotCount = 11;
     StackmapTableBuilder* stackmap_table_builder = new StackmapTableBuilder();
     EXPECT(stackmap_table_builder != NULL);
 
     BitmapBuilder* stack_bitmap = new BitmapBuilder();
     EXPECT(stack_bitmap != NULL);
     EXPECT_EQ(0, stack_bitmap->Length());
     stack_bitmap->Set(0, true);
@@ skipping 104 matching lines @@
     stack_map ^= stack_map_list.At(3);
     EXPECT_EQ(kStackSlotCount, stack_map.Length());
     for (intptr_t i = 0; i < kStackSlotCount; ++i) {
       EXPECT_EQ(expectation3[i], stack_map.IsObject(i));
     }
     retval = true;
   } else {
     retval = false;
   }
   EXPECT(retval);
-  isolate->set_long_jump_base(base);
 }
 CODEGEN_TEST_RUN(StackmapCodegen, Smi::New(1))
 
 
 static void NativeFunc(Dart_NativeArguments args) {
   Dart_Handle i = Dart_GetNativeArgument(args, 0);
   Dart_Handle k = Dart_GetNativeArgument(args, 1);
   int64_t value = -1;
   EXPECT_VALID(Dart_IntegerToInt64(i, &value));
   EXPECT_EQ(10, value);
@@ skipping 86 matching lines @@
 
   // Now invoke 'A.moo' and it will trigger a GC when the native function
   // is called, this should then cause the stack map of function 'A.foo'
   // to be traversed and the appropriate objects visited.
   const Object& result = Object::Handle(
       DartEntry::InvokeFunction(function_foo, Object::empty_array()));
   EXPECT(!result.IsError());
 }
 
 }  // namespace dart