44 lines
1.5 KiB
C++
44 lines
1.5 KiB
C++
// Copyright 2017 The Chromium Authors
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "components/metrics/expired_histograms_checker.h"
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#include <algorithm>
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#include <vector>
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#include "base/containers/contains.h"
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#include "base/memory/raw_ptr.h"
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#include "base/metrics/metrics_hashes.h"
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#include "base/metrics/statistics_recorder.h"
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#include "base/strings/string_split.h"
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namespace metrics {
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ExpiredHistogramsChecker::ExpiredHistogramsChecker(
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const uint32_t* expired_histogram_hashes,
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size_t size,
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const std::string& allowlist_str)
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: expired_histogram_hashes_(expired_histogram_hashes), size_(size) {
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InitAllowlist(allowlist_str);
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}
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ExpiredHistogramsChecker::~ExpiredHistogramsChecker() {}
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bool ExpiredHistogramsChecker::ShouldRecord(uint32_t histogram_hash) const {
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// If histogram is explicitly allowed then it should always be recorded.
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if (base::Contains(allowlist_, histogram_hash))
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return true;
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return !std::binary_search(expired_histogram_hashes_,
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expired_histogram_hashes_ + size_, histogram_hash);
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}
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void ExpiredHistogramsChecker::InitAllowlist(const std::string& allowlist_str) {
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std::vector<base::StringPiece> allowlist_names = base::SplitStringPiece(
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allowlist_str, ",", base::TRIM_WHITESPACE, base::SPLIT_WANT_NONEMPTY);
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for (base::StringPiece name : allowlist_names)
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allowlist_.insert(base::HashMetricNameAs32Bits(name));
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}
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} // namespace metrics
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