1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
|
/*
* Copyright 2020 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <LogSize.h>
#include <array>
#include <optional>
#include <string>
#include <android-base/parseint.h>
#include <android-base/properties.h>
bool IsValidBufferSize(size_t value) {
return kLogBufferMinSize <= value && value <= kLogBufferMaxSize;
}
static std::optional<size_t> GetBufferSizeProperty(const std::string& key) {
std::string value = android::base::GetProperty(key, "");
if (value.empty()) {
return {};
}
uint32_t size;
if (!android::base::ParseByteCount(value, &size)) {
return {};
}
if (!IsValidBufferSize(size)) {
return {};
}
return size;
}
static std::optional<size_t> GetBufferSizePropertyOverride(log_id_t log_id) {
std::string buffer_name = android_log_id_to_name(log_id);
std::array<std::string, 4> properties = {
"persist.logd.size." + buffer_name,
"ro.logd.size." + buffer_name,
"persist.logd.size",
"ro.logd.size",
};
for (const auto& property : properties) {
if (auto size = GetBufferSizeProperty(property)) {
return size;
}
}
return {};
}
/* This method should only be used for debuggable devices. */
static bool isAllowedToOverrideBufferSize() {
const auto hwType = android::base::GetProperty("ro.hardware.type", "");
/* We allow automotive devices to optionally override the default. */
return (hwType == "automotive");
}
size_t GetBufferSizeFromProperties(log_id_t log_id) {
/*
* http://b/196856709
*
* We've been seeing timeouts from logcat in bugreports for years, but the
* rate has gone way up lately. The suspicion is that this is because we
* have a lot of dogfooders who still have custom (large) log sizes but
* the new compressed logging is cramming way more in. The bugreports I've seen
* have had 1,000,000+ lines, so taking 10s to collect that much logging seems
* plausible. Of course, it's also possible that logcat is timing out because
* the log is being *spammed* as it's being read. But temporarily disabling
* custom log sizes like this should help us confirm (or deny) whether the
* problem really is this simple.
*/
static const bool isDebuggable = android::base::GetBoolProperty("ro.debuggable", false);
if (isDebuggable) {
static const bool mayOverride = isAllowedToOverrideBufferSize();
if (mayOverride) {
if (auto size = GetBufferSizePropertyOverride(log_id)) {
return *size;
}
}
} else {
static const bool isLowRam = android::base::GetBoolProperty("ro.config.low_ram", false);
/*
* For non-debuggable low_ram devices, we want to save memory here and
* use the minimum size.
*/
if (isLowRam) {
return kLogBufferMinSize;
}
}
return kDefaultLogBufferSize;
}
|
