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1 // Copyright 2017 The Chromium Authors. All rights reserved. | 1 // Copyright 2017 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "chrome/browser/experiments/memory_ablation_experiment.h" | 5 #include "chrome/browser/experiments/memory_ablation_experiment.h" |
6 | 6 |
7 #include <limits> | 7 #include <limits> |
8 | 8 |
9 #include "base/bind.h" | 9 #include "base/bind.h" |
10 #include "base/bind_helpers.h" | 10 #include "base/bind_helpers.h" |
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51 if (size > 0) { | 51 if (size > 0) { |
52 GetInstance()->Start(task_runner, size); | 52 GetInstance()->Start(task_runner, size); |
53 } | 53 } |
54 } | 54 } |
55 | 55 |
56 void MemoryAblationExperiment::Start( | 56 void MemoryAblationExperiment::Start( |
57 scoped_refptr<base::SequencedTaskRunner> task_runner, | 57 scoped_refptr<base::SequencedTaskRunner> task_runner, |
58 size_t memory_size) { | 58 size_t memory_size) { |
59 task_runner->PostDelayedTask( | 59 task_runner->PostDelayedTask( |
60 FROM_HERE, | 60 FROM_HERE, |
61 base::Bind(&MemoryAblationExperiment::AllocateMemory, | 61 base::BindOnce(&MemoryAblationExperiment::AllocateMemory, |
62 base::Unretained(this), memory_size), | 62 base::Unretained(this), memory_size), |
63 base::TimeDelta::FromSeconds(kMemoryAblationDelaySeconds)); | 63 base::TimeDelta::FromSeconds(kMemoryAblationDelaySeconds)); |
64 } | 64 } |
65 | 65 |
66 void MemoryAblationExperiment::AllocateMemory(size_t size) { | 66 void MemoryAblationExperiment::AllocateMemory(size_t size) { |
67 memory_size_ = size; | 67 memory_size_ = size; |
68 memory_.reset(new uint8_t[size]); | 68 memory_.reset(new uint8_t[size]); |
69 TouchMemory(); | 69 TouchMemory(); |
70 } | 70 } |
71 | 71 |
72 void MemoryAblationExperiment::TouchMemory() { | 72 void MemoryAblationExperiment::TouchMemory() { |
73 if (memory_) { | 73 if (memory_) { |
74 size_t page_size = base::GetPageSize(); | 74 size_t page_size = base::GetPageSize(); |
75 auto* memory = static_cast<volatile uint8_t*>(memory_.get()); | 75 auto* memory = static_cast<volatile uint8_t*>(memory_.get()); |
76 for (size_t i = 0; i < memory_size_; i += page_size) { | 76 for (size_t i = 0; i < memory_size_; i += page_size) { |
77 memory[i] = i; | 77 memory[i] = i; |
78 } | 78 } |
79 base::debug::Alias(memory_.get()); | 79 base::debug::Alias(memory_.get()); |
80 } | 80 } |
81 } | 81 } |
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