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| 1 | +From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 |
| 2 | +From: Andrey Belenko <anbelen@microsoft.com> |
| 3 | +Date: Fri, 3 Jul 2020 17:05:10 +0200 |
| 4 | +Subject: Backport 1063177 |
| 5 | + (https://chromium-review.googlesource.com/c/chromium/src/+/2111393/) |
| 6 | + |
| 7 | +diff --git a/extensions/browser/api/declarative_net_request/file_sequence_helper.cc b/extensions/browser/api/declarative_net_request/file_sequence_helper.cc |
| 8 | +index b4e340f3a865b79a9c8a1aa38fd86eb4db043c3c..2579f39d4b2f10b665f95febe2c69409188529ff 100644 |
| 9 | +--- a/extensions/browser/api/declarative_net_request/file_sequence_helper.cc |
| 10 | ++++ b/extensions/browser/api/declarative_net_request/file_sequence_helper.cc |
| 11 | +@@ -7,9 +7,11 @@ |
| 12 | + #include <set> |
| 13 | + #include <utility> |
| 14 | + |
| 15 | ++#include "base/barrier_closure.h" |
| 16 | + #include "base/bind.h" |
| 17 | + #include "base/files/file_util.h" |
| 18 | + #include "base/logging.h" |
| 19 | ++#include "base/memory/ref_counted.h" |
| 20 | + #include "base/metrics/histogram_functions.h" |
| 21 | + #include "base/metrics/histogram_macros.h" |
| 22 | + #include "base/stl_util.h" |
| 23 | +@@ -31,49 +33,57 @@ namespace { |
| 24 | + namespace dnr_api = extensions::api::declarative_net_request; |
| 25 | + |
| 26 | + // A class to help in re-indexing multiple rulesets. |
| 27 | +-class ReindexHelper { |
| 28 | ++class ReindexHelper : public base::RefCountedThreadSafe<ReindexHelper> { |
| 29 | + public: |
| 30 | +- // Starts re-indexing rulesets. Must be called on the extension file task |
| 31 | +- // runner. |
| 32 | + using ReindexCallback = base::OnceCallback<void(LoadRequestData)>; |
| 33 | +- static void Start(LoadRequestData data, ReindexCallback callback) { |
| 34 | +- auto* helper = new ReindexHelper(std::move(data), std::move(callback)); |
| 35 | +- helper->Start(); |
| 36 | +- } |
| 37 | +- |
| 38 | +- private: |
| 39 | +- // We manage our own lifetime. |
| 40 | + ReindexHelper(LoadRequestData data, ReindexCallback callback) |
| 41 | + : data_(std::move(data)), callback_(std::move(callback)) {} |
| 42 | +- ~ReindexHelper() = default; |
| 43 | +- |
| 44 | ++ |
| 45 | ++ // Starts re-indexing rulesets. Must be called on the extension file task |
| 46 | ++ // runner. |
| 47 | + void Start() { |
| 48 | + DCHECK(GetExtensionFileTaskRunner()->RunsTasksInCurrentSequence()); |
| 49 | + |
| 50 | +- // Post tasks to reindex individual rulesets. |
| 51 | +- bool did_post_task = false; |
| 52 | ++ std::vector<RulesetInfo*> rulesets_to_reindex; |
| 53 | ++ |
| 54 | + for (auto& ruleset : data_.rulesets) { |
| 55 | + if (ruleset.did_load_successfully()) |
| 56 | + continue; |
| 57 | + |
| 58 | +- // Using Unretained is safe since this class manages its own lifetime and |
| 59 | +- // |this| won't be deleted until the |callback| returns. |
| 60 | +- auto callback = base::BindOnce(&ReindexHelper::OnReindexCompleted, |
| 61 | +- base::Unretained(this), &ruleset); |
| 62 | +- callback_count_++; |
| 63 | +- did_post_task = true; |
| 64 | +- ruleset.source().IndexAndPersistJSONRuleset(&decoder_, |
| 65 | +- std::move(callback)); |
| 66 | ++ rulesets_to_reindex.push_back(&ruleset); |
| 67 | + } |
| 68 | + |
| 69 | +- // It's possible that the callbacks return synchronously and we are deleted |
| 70 | +- // at this point. Hence don't use any member variables here. Also, if we |
| 71 | +- // don't post any task, we'll leak. Ensure that's not the case. |
| 72 | +- DCHECK(did_post_task); |
| 73 | ++ // |done_closure| will be invoked once |barrier_closure| is run |
| 74 | ++ // |rulesets_to_reindex.size()| times. |
| 75 | ++ base::OnceClosure done_closure = |
| 76 | ++ base::BindOnce(&ReindexHelper::OnAllRulesetsReindexed, this); |
| 77 | ++ base::RepeatingClosure barrier_closure = base::BarrierClosure( |
| 78 | ++ rulesets_to_reindex.size(), std::move(done_closure)); |
| 79 | ++ |
| 80 | ++ // Post tasks to reindex individual rulesets. |
| 81 | ++ for (RulesetInfo* ruleset : rulesets_to_reindex) { |
| 82 | ++ auto callback = base::BindOnce(&ReindexHelper::OnReindexCompleted, this, |
| 83 | ++ ruleset, barrier_closure); |
| 84 | ++ ruleset->source().IndexAndPersistJSONRuleset(&decoder_, |
| 85 | ++ std::move(callback)); |
| 86 | ++ } |
| 87 | ++ } |
| 88 | ++ |
| 89 | ++ private: |
| 90 | ++ friend class base::RefCountedThreadSafe<ReindexHelper>; |
| 91 | ++ ~ReindexHelper() = default; |
| 92 | ++ |
| 93 | ++ // Callback invoked when reindexing of all rulesets is completed. |
| 94 | ++ void OnAllRulesetsReindexed() { |
| 95 | ++ DCHECK(GetExtensionFileTaskRunner()->RunsTasksInCurrentSequence()); |
| 96 | ++ |
| 97 | ++ // Our job is done. |
| 98 | ++ std::move(callback_).Run(std::move(data_)); |
| 99 | + } |
| 100 | + |
| 101 | + // Callback invoked when a single ruleset is re-indexed. |
| 102 | + void OnReindexCompleted(RulesetInfo* ruleset, |
| 103 | ++ base::OnceClosure done_closure, |
| 104 | + IndexAndPersistJSONRulesetResult result) { |
| 105 | + DCHECK(ruleset); |
| 106 | + |
| 107 | +@@ -105,19 +115,11 @@ class ReindexHelper { |
| 108 | + "Extensions.DeclarativeNetRequest.RulesetReindexSuccessful", |
| 109 | + reindexing_success); |
| 110 | + |
| 111 | +- callback_count_--; |
| 112 | +- DCHECK_GE(callback_count_, 0); |
| 113 | +- |
| 114 | +- if (callback_count_ == 0) { |
| 115 | +- // Our job is done. |
| 116 | +- std::move(callback_).Run(std::move(data_)); |
| 117 | +- delete this; |
| 118 | +- } |
| 119 | ++ std::move(done_closure).Run(); |
| 120 | + } |
| 121 | + |
| 122 | + LoadRequestData data_; |
| 123 | + ReindexCallback callback_; |
| 124 | +- int callback_count_ = 0; |
| 125 | + |
| 126 | + // We use a single shared Data Decoder service instance to process all of the |
| 127 | + // rulesets for this ReindexHelper. |
| 128 | +@@ -362,7 +364,10 @@ void FileSequenceHelper::LoadRulesets( |
| 129 | + auto reindex_callback = |
| 130 | + base::BindOnce(&FileSequenceHelper::OnRulesetsReindexed, |
| 131 | + weak_factory_.GetWeakPtr(), std::move(ui_callback)); |
| 132 | +- ReindexHelper::Start(std::move(load_data), std::move(reindex_callback)); |
| 133 | ++ |
| 134 | ++ auto reindex_helper = base::MakeRefCounted<ReindexHelper>( |
| 135 | ++ std::move(load_data), std::move(reindex_callback)); |
| 136 | ++ reindex_helper->Start(); |
| 137 | + } |
| 138 | + |
| 139 | + void FileSequenceHelper::UpdateDynamicRules( |
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