1 files changed, 116 insertions, 0 deletions
diff --git a/runtime/verifier/instruction_flags.h b/runtime/verifier/instruction_flags.h
new file mode 100644
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--- /dev/null
+++ b/runtime/verifier/instruction_flags.h
@@ -0,0 +1,116 @@
+/*
+ * Copyright (C) 2011 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ART_SRC_VERIFIER_METHOD_INSTRUCTION_FLAGS_H_
+#define ART_SRC_VERIFIER_METHOD_INSTRUCTION_FLAGS_H_
+
+#include "base/logging.h"
+
+#include <stdint.h>
+#include <string>
+
+namespace art {
+namespace verifier {
+
+class InstructionFlags {
+ public:
+  InstructionFlags() : length_(0), flags_(0) {}
+
+  void SetLengthInCodeUnits(size_t length) {
+    DCHECK_LT(length, 65536u);
+    length_ = length;
+  }
+  size_t GetLengthInCodeUnits() {
+    return length_;
+  }
+  bool IsOpcode() const {
+    return length_ != 0;
+  }
+
+  void SetInTry() {
+    flags_ |= 1 << kInTry;
+  }
+  void ClearInTry() {
+    flags_ &= ~(1 << kInTry);
+  }
+  bool IsInTry() const {
+    return (flags_ & (1 << kInTry)) != 0;
+  }
+
+  void SetBranchTarget() {
+    flags_ |= 1 << kBranchTarget;
+  }
+  void ClearBranchTarget() {
+    flags_ &= ~(1 << kBranchTarget);
+  }
+  bool IsBranchTarget() const {
+    return (flags_ & (1 << kBranchTarget)) != 0;
+  }
+  void SetCompileTimeInfoPoint() {
+    flags_ |= 1 << kCompileTimeInfoPoint;
+  }
+  void ClearCompileTimeInfoPoint() {
+    flags_ &= ~(1 << kCompileTimeInfoPoint);
+  }
+  bool IsCompileTimeInfoPoint() const {
+    return (flags_ & (1 << kCompileTimeInfoPoint)) != 0;
+  }
+
+  void SetVisited() {
+    flags_ |= 1 << kVisited;
+  }
+  void ClearVisited() {
+    flags_ &= ~(1 << kVisited);
+  }
+  bool IsVisited() const {
+    return (flags_ & (1 << kVisited)) != 0;
+  }
+
+  void SetChanged() {
+    flags_ |= 1 << kChanged;
+  }
+  void ClearChanged() {
+    flags_ &= ~(1 << kChanged);
+  }
+  bool IsChanged() const {
+    return (flags_ & (1 << kChanged)) != 0;
+  }
+
+  bool IsVisitedOrChanged() const {
+    return IsVisited() || IsChanged();
+  }
+
+  std::string ToString() const;
+
+ private:
+  enum {
+    kInTry,
+    kBranchTarget,
+    kCompileTimeInfoPoint,  // Location of interest to the compiler for GC maps and
+                            // verifier based method sharpening.
+    kVisited,
+    kChanged,
+  };
+
+  // Size of instruction in code units.
+  uint16_t length_;
+  uint8_t flags_;
+};
+
+}  // namespace verifier
+}  // namespace art
+
+#endif  // ART_SRC_VERIFIER_METHOD_INSTRUCTION_FLAGS_H_