forked from mirrors/gecko-dev
2f85363b64
This adds histograms for the stuff added in bug 1575062, which is needed for the webcompat metrics project. This also tweaks the naming to be consistent across all CSS properties. Normally the method is just equivalent to the camel_case thing except for: * The css float property, whose method is CssFloat. * Internal properties (but we don't count those anyway). This is so that we get consistent usage data if we ever implement some of those properties. I had to increase the PHF table size to make build times sane again (for some reason adding the "d" property in there blows up the phf map generation time). But according to Nika the binary size impact of that change is minimal / irrelevant: https://mozilla.logbot.info/content/20190904#c16590376 So I think it should be fine. chance Differential Revision: https://phabricator.services.mozilla.com/D44716 --HG-- extra : moz-landing-system : lando
67 lines
1.8 KiB
Python
67 lines
1.8 KiB
Python
# This Source Code Form is subject to the terms of the Mozilla Public
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# License, v. 2.0. If a copy of the MPL was not distributed with this
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# file, You can obtain one at http://mozilla.org/MPL/2.0/.
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from __future__ import print_function
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from mozparsers.shared_telemetry_utils import ParserError
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from perfecthash import PerfectHash
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PHFSIZE = 1024
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from mozparsers import parse_histograms
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import sys
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import buildconfig
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banner = """/* This file is auto-generated, see gen_histogram_phf.py. */
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"""
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header = """
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#ifndef mozilla_TelemetryHistogramNameMap_h
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#define mozilla_TelemetryHistogramNameMap_h
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#include "mozilla/PerfectHash.h"
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namespace mozilla {
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namespace Telemetry {
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"""
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footer = """
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} // namespace mozilla
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} // namespace Telemetry
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#endif // mozilla_TelemetryHistogramNameMap_h
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"""
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def main(output, *filenames):
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"""
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Generate a Perfect Hash Table for the Histogram name -> Histogram ID lookup.
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The table is immutable once generated and we can avoid any dynamic memory allocation.
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"""
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output.write(banner)
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output.write(header)
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try:
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histograms = list(parse_histograms.from_files(filenames))
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histograms = [h for h in histograms if h.record_on_os(buildconfig.substs["OS_TARGET"])]
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except ParserError as ex:
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print("\nError processing histograms:\n" + str(ex) + "\n")
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sys.exit(1)
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histograms = [(bytearray(hist.name(), 'ascii'), idx) for (idx, hist) in enumerate(histograms)]
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name_phf = PerfectHash(histograms, PHFSIZE)
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output.write(name_phf.cxx_codegen(
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name='HistogramIDByNameLookup',
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entry_type="uint32_t",
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lower_entry=lambda x: str(x[1]),
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key_type="const nsACString&",
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key_bytes="aKey.BeginReading()",
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key_length="aKey.Length()"))
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output.write(footer)
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if __name__ == '__main__':
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main(sys.stdout, *sys.argv[1:])
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