Give a length field to stack bitmaps.

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"
 #if defined(TARGET_ARCH_IA32) || defined(TARGET_ARCH_X64)
 
 #include "vm/ast.h"
 #include "vm/assembler.h"
@@ skipping 44 matching lines @@
   isolate->set_long_jump_base(&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(kStackSlotCount);
     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);
+    EXPECT_EQ(1, stack_bitmap->Length());
+    stack_bitmap->SetLength(kStackSlotCount);
+    EXPECT_EQ(kStackSlotCount, stack_bitmap->Length());
+
     bool expectation0[kStackSlotCount] = { true };
     for (intptr_t i = 0; i < kStackSlotCount; ++i) {
       EXPECT_EQ(expectation0[i], stack_bitmap->Get(i));
     }
     // Add a stack map entry at pc offset 0.
     stackmap_table_builder->AddEntry(0, stack_bitmap);
 
     stack_bitmap = new BitmapBuilder();
     EXPECT(stack_bitmap != NULL);
+    EXPECT_EQ(0, stack_bitmap->Length());
     stack_bitmap->Set(0, true);
     stack_bitmap->Set(1, false);
     stack_bitmap->Set(2, true);
+    EXPECT_EQ(3, stack_bitmap->Length());
+    stack_bitmap->SetLength(kStackSlotCount);
+    EXPECT_EQ(kStackSlotCount, stack_bitmap->Length());
+
     bool expectation1[kStackSlotCount] = { true, false, true };
     for (intptr_t i = 0; i < kStackSlotCount; ++i) {
       EXPECT_EQ(expectation1[i], stack_bitmap->Get(i));
     }
     // Add a stack map entry at pc offset 1.
     stackmap_table_builder->AddEntry(1, stack_bitmap);
 
     stack_bitmap = new BitmapBuilder();
     EXPECT(stack_bitmap != NULL);
+    EXPECT_EQ(0, stack_bitmap->Length());
     stack_bitmap->Set(0, true);
     stack_bitmap->Set(1, false);
     stack_bitmap->Set(2, true);
     stack_bitmap->SetRange(3, 5, true);
+    EXPECT_EQ(6, stack_bitmap->Length());
+    stack_bitmap->SetLength(kStackSlotCount);
+    EXPECT_EQ(kStackSlotCount, stack_bitmap->Length());
+
     bool expectation2[kStackSlotCount] =
         { true, false, true, true, true, true };
     for (intptr_t i = 0; i < kStackSlotCount; ++i) {
       EXPECT_EQ(expectation2[i], stack_bitmap->Get(i));
     }
     // Add a stack map entry at pc offset 2.
     stackmap_table_builder->AddEntry(2, stack_bitmap);
 
     stack_bitmap = new BitmapBuilder();
     EXPECT(stack_bitmap != NULL);
+    EXPECT_EQ(0, stack_bitmap->Length());
     stack_bitmap->Set(0, true);
     stack_bitmap->Set(1, false);
     stack_bitmap->Set(2, true);
     stack_bitmap->SetRange(3, 5, true);
     stack_bitmap->SetRange(6, 9, false);
     stack_bitmap->Set(10, true);
+    EXPECT_EQ(11, stack_bitmap->Length());
+    stack_bitmap->SetLength(kStackSlotCount);
+    EXPECT_EQ(kStackSlotCount, stack_bitmap->Length());
+
     bool expectation3[kStackSlotCount] =
         { true, false, true, true, true, true, false, false,
           false, false, true };
     for (intptr_t i = 0; i < kStackSlotCount; ++i) {
       EXPECT_EQ(expectation3[i], stack_bitmap->Get(i));
     }
     // Add a stack map entry at pc offset 3.
     stackmap_table_builder->AddEntry(3, stack_bitmap);
 
     const Error& error =
@@ skipping 138 matching lines @@
   GrowableArray<const Object*> arguments;
   const Array& kNoArgumentNames = Array::Handle();
   Object& result = Object::Handle();
   result = DartEntry::InvokeStatic(function_foo, arguments, kNoArgumentNames);
   EXPECT(!result.IsError());
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_IA32 || defined(TARGET_ARCH_X64)