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103 lines
3.5 KiB
103 lines
3.5 KiB
#
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# Copyright (C) 2016 The Android Open Source Project
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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class FunctionSummary(object):
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"""Summarizes a function and its blocks from .gcno file.
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Attributes:
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blocks: list of BlockSummary objects for each block in the function.
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ident: integer function identifier.
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name: function name.
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src_file_name: name of source file containing the function.
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first_line_number: integer line number at which the function begins in
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srcFile.
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"""
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def __init__(self, ident, name, src_file_name, first_line_number):
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"""Inits the function summary with provided values.
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Stores the identification string, name, source file name, and
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first line number in the object attributes. Initializes the block
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attribute to the empty list.
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Args:
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ident: integer function identifier.
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name: function name.
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src_file_name: name of source file containing the function.
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first_line_number: integer line number at which the function begins in
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the source file.
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"""
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self.blocks = []
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self.ident = ident
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self.name = name
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self.src_file_name = src_file_name
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self.first_line_number = first_line_number
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def Resolve(self):
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"""Resolves the block and arc counts.
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Using the edges that were resolved by the GCDA file,
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counts are resolved in the unresolved arcs. Then, block
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counts are resolved by summing the counts along arcs entering
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the block.
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Returns:
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True if the counts could be resolved and False otherwise.
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"""
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unresolved_arcs = []
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for block in self.blocks:
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for arc in block.exit_arcs:
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if not arc.resolved:
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unresolved_arcs.append(arc)
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index = 0
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prev_length = len(unresolved_arcs) + 1
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# Resolve the arc counts
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while len(unresolved_arcs) > 0:
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index = index % len(unresolved_arcs)
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if index == 0 and len(unresolved_arcs) == prev_length:
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return False
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else:
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prev_length = len(unresolved_arcs)
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arc = unresolved_arcs[index]
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if arc.Resolve():
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unresolved_arcs.remove(arc)
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else:
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index = index + 1
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# Resolve the block counts
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for block in self.blocks:
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if len(block.entry_arcs):
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block.count = sum(arc.count for arc in block.entry_arcs)
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else:
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block.count = sum(arc.count for arc in block.exit_arcs)
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return True
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def __str__(self):
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"""Serializes the function summary as a string.
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Returns:
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String representation of the functions and its blocks.
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"""
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output = ('Function: %s : %s\r\n\tFirst Line Number:%i\r\n' %
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(self.src_file_name, self.name, self.first_line_number))
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for b in self.blocks:
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output += str(b)
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return output
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