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Reimplemented coverage.py, using only gcov and with line+branch coverage

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This also adds coverage support to the new test framework, which due to
reduction in scope, no longer needs aggregation and can be much
simpler. Really all we need to do is pass --coverage to GCC, which
builds its .gcda files during testing in a multi-process-safe manner.

The addition of branch coverage leverages information that was available
in both lcov and gcov.

This was made easier with the addition of the --json-format to gcov
in GCC 9.0, however the lax backwards compatibility for gcov's
intermediary options is a bit concerning. Hopefully --json-format
sticks around for a while.
This commit is contained in:
Christopher Haster
2022-05-15 23:03:58 -05:00
parent 2b11f2b426
commit 4a7e94fb15
4 changed files with 300 additions and 225 deletions
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8
scripts/stack.py
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@@ -414,14 +414,14 @@ if __name__ == "__main__":
help="Show all functions, not just the ones that changed.")
parser.add_argument('-A', '--everything', action='store_true',
help="Include builtin and libc specific symbols.")
parser.add_argument('-s', '--limit-sort', action='store_true',
help="Sort by stack limit.")
parser.add_argument('-S', '--reverse-limit-sort', action='store_true',
help="Sort by stack limit, but backwards.")
parser.add_argument('--frame-sort', action='store_true',
help="Sort by stack frame size.")
parser.add_argument('--reverse-frame-sort', action='store_true',
help="Sort by stack frame size, but backwards.")
parser.add_argument('-s', '--limit-sort', action='store_true',
help="Sort by stack limit.")
parser.add_argument('-S', '--reverse-limit-sort', action='store_true',
help="Sort by stack limit, but backwards.")
parser.add_argument('-L', '--depth', default=0, type=lambda x: int(x, 0),
nargs='?', const=float('inf'),
help="Depth of dependencies to show.")