Add code item accessor helper classes

Add classes to abstract accesses to code item data. These classes
handle both standard dex and compact dex.

Added:
- CodeItemInstructionsAccessor to handle code item instructions.
- CodeItemDataAccessor to handle code item data excluding debug info.

Moved inline_method_analyzer to use the new classes to test the new
APIs.

Bug: 63756964
Test: test-art-host
Change-Id: I9926acb77b81fa64ed4a3b49b7bed1aab30a0f33

1 files changed, 13 insertions, 0 deletions

diff --git a/runtime/art_method-inl.h b/runtime/art_method-inl.h
index 12b4d16b37..eb16e6eaa2 100644
--- a/runtime/art_method-inl.h
+++ b/runtime/art_method-inl.h
@@ -23,6 +23,7 @@
 #include "base/callee_save_type.h"
 #include "base/logging.h"
 #include "class_linker-inl.h"
+#include "code_item_accessors-inl.h"
 #include "common_throws.h"
 #include "dex_file-inl.h"
 #include "dex_file_annotations.h"
@@ -457,6 +458,18 @@ inline void ArtMethod::UpdateEntrypoints(const Visitor& visitor, PointerSize poi
   }
 }
 
+inline IterationRange<DexInstructionIterator> ArtMethod::DexInstructions() {
+  CodeItemInstructionAccessor accessor(this);
+  return { accessor.begin(),
+           accessor.end() };
+}
+
+inline IterationRange<DexInstructionIterator> ArtMethod::NullableDexInstructions() {
+  CodeItemInstructionAccessor accessor(CodeItemInstructionAccessor::CreateNullable(this));
+  return { accessor.begin(),
+           accessor.end() };
+}
+
 }  // namespace art
 
 #endif  // ART_RUNTIME_ART_METHOD_INL_H_