Fix vm code base so that it can be built for --arch=simarm (no snapshot yet).

runtime/vm/instructions_arm.h

+// Copyright (c) 2013, 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.
+// Classes that describe assembly patterns as used by inline caches.
+
+#ifndef VM_INSTRUCTIONS_ARM_H_
+#define VM_INSTRUCTIONS_ARM_H_
+
+#ifndef VM_INSTRUCTIONS_H_
+#error Do not include instructions_arm.h directly; use instructions.h instead.
+#endif
+
+#include "vm/allocation.h"
+
+namespace dart {
+
+// Forward declarations.
+class RawClass;
+class Immediate;
+class RawObject;
+
+// Abstract class for all instruction pattern classes.
+class InstructionPattern : public ValueObject {
+ public:
+  explicit InstructionPattern(uword pc) : start_(pc) {
+    ASSERT(pc != 0);
+  }
+  virtual ~InstructionPattern() {}
+
+  // Call to check if the instruction pattern at 'pc' match the instruction.
+  virtual bool IsValid() const {
+    return TestBytesWith(pattern(), pattern_length_in_bytes());
+  }
+
+  // 'pattern' returns the expected byte pattern in form of an integer array
+  // with length of 'pattern_length_in_bytes'. A '-1' element means 'any byte'.
+  virtual const int* pattern() const = 0;
+  virtual int pattern_length_in_bytes() const = 0;
+
+ protected:
+  uword start() const { return start_; }
+
+ private:
+  // Returns true if the 'num_bytes' bytes at 'start_' correspond to
+  // array of integers 'data'. 'data' elements are either a byte or -1, which
+  // represents any byte.
+  bool TestBytesWith(const int* data, int num_bytes) const;
+
+  const uword start_;
+
+  DISALLOW_COPY_AND_ASSIGN(InstructionPattern);
+};
+
+
+class CallOrJumpPattern : public InstructionPattern {
+ public:
+  virtual int pattern_length_in_bytes() const {
+    return kLengthInBytes;
+  }
+  uword TargetAddress() const;
+  void SetTargetAddress(uword new_target) const;
+
+ protected:
+  explicit CallOrJumpPattern(uword pc) : InstructionPattern(pc) {}
+  static const int kLengthInBytes = 0;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(CallOrJumpPattern);
+};
+
+
+class CallPattern : public CallOrJumpPattern {
+ public:
+  explicit CallPattern(uword pc) : CallOrJumpPattern(pc) {}
+  static int InstructionLength() {
+    return kLengthInBytes;
+  }
+
+ private:
+  virtual const int* pattern() const;
+
+  DISALLOW_COPY_AND_ASSIGN(CallPattern);
+};
+
+
+class JumpPattern : public CallOrJumpPattern {
+ public:
+  explicit JumpPattern(uword pc) : CallOrJumpPattern(pc) {}
+
+ private:
+  virtual const int* pattern() const;
+
+  DISALLOW_COPY_AND_ASSIGN(JumpPattern);
+};
+
+}  // namespace dart
+
+#endif  // VM_INSTRUCTIONS_ARM_H_
+