Mercurial Repositories > eric / file comparison
comparison: DebugClients/Python/coverage/bytecode.py
DebugClients/Python/coverage/bytecode.py
- changeset 4491
- 0d8612e24fef
- parent 4489
- d0d6e4ad31bd
- child 5051
- 3586ebd9fac8
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| 4487:4ba7a8ab24f2 | 4491:0d8612e24fef |
|---|---|
| 1 # Licensed under the Apache License: http://www.apache.org/licenses/LICENSE-2.0 | |
| 2 # For details: https://bitbucket.org/ned/coveragepy/src/default/NOTICE.txt | |
| 3 | |
| 1 """Bytecode manipulation for coverage.py""" | 4 """Bytecode manipulation for coverage.py""" |
| 2 | 5 |
| 3 import opcode, types | 6 import opcode |
| 7 import types | |
| 4 | 8 |
| 5 from .backward import byte_to_int | 9 from coverage.backward import byte_to_int |
| 10 | |
| 6 | 11 |
| 7 class ByteCode(object): | 12 class ByteCode(object): |
| 8 """A single bytecode.""" | 13 """A single bytecode.""" |
| 9 def __init__(self): | 14 def __init__(self): |
| 10 # The offset of this bytecode in the code object. | 15 # The offset of this bytecode in the code object. |
| 24 | 29 |
| 25 | 30 |
| 26 class ByteCodes(object): | 31 class ByteCodes(object): |
| 27 """Iterator over byte codes in `code`. | 32 """Iterator over byte codes in `code`. |
| 28 | 33 |
| 34 This handles the logic of EXTENDED_ARG byte codes internally. Those byte | |
| 35 codes are not returned by this iterator. | |
| 36 | |
| 29 Returns `ByteCode` objects. | 37 Returns `ByteCode` objects. |
| 30 | 38 |
| 31 """ | 39 """ |
| 32 # pylint: disable=R0924 | |
| 33 def __init__(self, code): | 40 def __init__(self, code): |
| 34 self.code = code | 41 self.code = code |
| 35 | 42 |
| 36 def __getitem__(self, i): | 43 def __getitem__(self, i): |
| 37 return byte_to_int(self.code[i]) | 44 return byte_to_int(self.code[i]) |
| 38 | 45 |
| 39 def __iter__(self): | 46 def __iter__(self): |
| 40 offset = 0 | 47 offset = 0 |
| 48 ext_arg = 0 | |
| 41 while offset < len(self.code): | 49 while offset < len(self.code): |
| 42 bc = ByteCode() | 50 bc = ByteCode() |
| 43 bc.op = self[offset] | 51 bc.op = self[offset] |
| 44 bc.offset = offset | 52 bc.offset = offset |
| 45 | 53 |
| 46 next_offset = offset+1 | 54 next_offset = offset+1 |
| 47 if bc.op >= opcode.HAVE_ARGUMENT: | 55 if bc.op >= opcode.HAVE_ARGUMENT: |
| 48 bc.arg = self[offset+1] + 256*self[offset+2] | 56 bc.arg = ext_arg + self[offset+1] + 256*self[offset+2] |
| 49 next_offset += 2 | 57 next_offset += 2 |
| 50 | 58 |
| 51 label = -1 | 59 label = -1 |
| 52 if bc.op in opcode.hasjrel: | 60 if bc.op in opcode.hasjrel: |
| 53 label = next_offset + bc.arg | 61 label = next_offset + bc.arg |
| 54 elif bc.op in opcode.hasjabs: | 62 elif bc.op in opcode.hasjabs: |
| 55 label = bc.arg | 63 label = bc.arg |
| 56 bc.jump_to = label | 64 bc.jump_to = label |
| 57 | 65 |
| 58 bc.next_offset = offset = next_offset | 66 bc.next_offset = offset = next_offset |
| 59 yield bc | 67 if bc.op == opcode.EXTENDED_ARG: |
| 68 ext_arg = bc.arg * 256*256 | |
| 69 else: | |
| 70 ext_arg = 0 | |
| 71 yield bc | |
| 60 | 72 |
| 61 | 73 |
| 62 class CodeObjects(object): | 74 class CodeObjects(object): |
| 63 """Iterate over all the code objects in `code`.""" | 75 """Iterate over all the code objects in `code`.""" |
| 64 def __init__(self, code): | 76 def __init__(self, code): |
