blob: f320b732bafa0838577fd019b74f2e6b36e9e259 [file] [log] [blame]
# Copyright 2021 The Fuchsia Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
This scripts allows to get basic stats about the inspect.json file contained in a file.
To use you need to have a file either generated by `ffx inspect` or from a crash report.
Example usage:
$ unzip /path/to/
$ python3 --sort nodes /path/to/unzipped/inspect.json
import argparse
import json
import sys
def measure(obj, depth=0):
Returns the number of nodes, properties and the depth of an inspect tree.
`obj` is a dict read from JSON that represents inspect data
nodes = 0
properties = 0
max_depth = depth
for (_, child) in obj.items():
# ensure this is a node that is not a histogram
if type(child) is dict and 'buckets' not in child:
(child_nodes, child_properties, child_depth) = measure(
child, depth=depth + 1)
nodes += child_nodes + 1
properties += child_properties
max_depth = max(max_depth, child_depth)
properties += 1
return nodes, properties, max_depth
def get_sort_index(sort_opt):
if args.sort == 'nodes':
return 0
elif args.sort == 'properties':
return 1
elif args.sort == 'depth':
return 2
if __name__ == '__main__':
parser = argparse.ArgumentParser(
description='Show stats about inspect data in a snapshot.')
'filepath', metavar='FILE', type=str, help='path to inspect.json file')
choices=['depth', 'nodes', 'properties'],
help='based on what the output will be sorted')
args = parser.parse_args(sys.argv[1:])
with open(args.filepath) as f:
data = json.load(f)
results = [
(response['moniker'], measure(response['payload']))
for response in data
if response['payload']
sort_index = get_sort_index(args.sort)
results.sort(key=lambda v: v[1][sort_index], reverse=True)
for (moniker, (nodes, properties, depth)) in results:
print('{:<20} {} {} {}'.format(moniker, nodes, properties, depth))