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Merge "Revert "Save environment snapshot and use at fork/exec"" into nyc-mr1-dev
[android-x86/art.git] / disassembler / disassembler.h
1 /*
2  * Copyright (C) 2012 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16
17 #ifndef ART_DISASSEMBLER_DISASSEMBLER_H_
18 #define ART_DISASSEMBLER_DISASSEMBLER_H_
19
20 #include <stdint.h>
21
22 #include <iosfwd>
23
24 #include "arch/instruction_set.h"
25 #include "base/macros.h"
26
27 namespace art {
28
29 class DisassemblerOptions {
30  public:
31   // Should the disassembler print absolute or relative addresses.
32   const bool absolute_addresses_;
33
34   // Base address for calculating relative code offsets when absolute_addresses_ is false.
35   const uint8_t* const base_address_;
36
37   // End address (exclusive);
38   const uint8_t* const end_address_;
39
40   // If set, the disassembler is allowed to look at load targets in literal
41   // pools.
42   const bool can_read_literals_;
43
44   DisassemblerOptions(bool absolute_addresses,
45                       const uint8_t* base_address,
46                       const uint8_t* end_address,
47                       bool can_read_literals)
48       : absolute_addresses_(absolute_addresses),
49         base_address_(base_address),
50         end_address_(end_address),
51         can_read_literals_(can_read_literals) {}
52
53  private:
54   DISALLOW_COPY_AND_ASSIGN(DisassemblerOptions);
55 };
56
57 class Disassembler {
58  public:
59   // Creates a Disassembler for the given InstructionSet with the
60   // non-null DisassemblerOptions which become owned by the
61   // Disassembler.
62   static Disassembler* Create(InstructionSet instruction_set, DisassemblerOptions* options);
63
64   virtual ~Disassembler() {
65     delete disassembler_options_;
66   }
67
68   // Dump a single instruction returning the length of that instruction.
69   virtual size_t Dump(std::ostream& os, const uint8_t* begin) = 0;
70   // Dump instructions within a range.
71   virtual void Dump(std::ostream& os, const uint8_t* begin, const uint8_t* end) = 0;
72
73   const DisassemblerOptions* GetDisassemblerOptions() const {
74     return disassembler_options_;
75   }
76
77  protected:
78   explicit Disassembler(DisassemblerOptions* disassembler_options)
79       : disassembler_options_(disassembler_options) {
80     CHECK(disassembler_options_ != nullptr);
81   }
82
83   std::string FormatInstructionPointer(const uint8_t* begin);
84
85  private:
86   DisassemblerOptions* disassembler_options_;
87   DISALLOW_COPY_AND_ASSIGN(Disassembler);
88 };
89
90 static inline bool HasBitSet(uint32_t value, uint32_t bit) {
91   return (value & (1 << bit)) != 0;
92 }
93
94 extern "C"
95 Disassembler* create_disassembler(InstructionSet instruction_set, DisassemblerOptions* options);
96
97 }  // namespace art
98
99 #endif  // ART_DISASSEMBLER_DISASSEMBLER_H_