Index: runtime/vm/instructions_arm.h |
=================================================================== |
--- runtime/vm/instructions_arm.h (revision 0) |
+++ runtime/vm/instructions_arm.h (revision 0) |
@@ -0,0 +1,99 @@ |
+// 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_ |
+ |