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
|
// Copyright 2014 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/android/library_loader/library_loader_hooks.h"
#include <string>
#include "base/android/jni_string.h"
#include "base/android/library_loader/anchor_functions_buildflags.h"
#include "base/android/library_loader/library_prefetcher.h"
#include "base/android/orderfile/orderfile_buildflags.h"
#include "base/android/sys_utils.h"
#include "base/at_exit.h"
#include "base/base_jni/LibraryLoader_jni.h"
#include "base/base_switches.h"
#include "base/metrics/histogram.h"
#include "base/metrics/histogram_functions.h"
#include "base/metrics/histogram_macros.h"
#if BUILDFLAG(ORDERFILE_INSTRUMENTATION)
#include "base/android/orderfile/orderfile_instrumentation.h"
#endif
namespace base {
namespace android {
namespace {
base::AtExitManager* g_at_exit_manager = nullptr;
LibraryLoadedHook* g_registration_callback = nullptr;
NativeInitializationHook* g_native_initialization_hook = nullptr;
LibraryProcessType g_library_process_type = PROCESS_UNINITIALIZED;
} // namespace
LibraryProcessType GetLibraryProcessType() {
return g_library_process_type;
}
bool IsUsingOrderfileOptimization() {
#if BUILDFLAG(SUPPORTS_CODE_ORDERING)
return SysUtils::IsLowEndDeviceFromJni();
#else // !SUPPORTS_CODE_ORDERING
return false;
#endif
}
void SetNativeInitializationHook(
NativeInitializationHook native_initialization_hook) {
g_native_initialization_hook = native_initialization_hook;
}
void SetLibraryLoadedHook(LibraryLoadedHook* func) {
g_registration_callback = func;
}
static jboolean JNI_LibraryLoader_LibraryLoaded(
JNIEnv* env,
jint library_process_type) {
DCHECK_EQ(g_library_process_type, PROCESS_UNINITIALIZED);
g_library_process_type =
static_cast<LibraryProcessType>(library_process_type);
#if BUILDFLAG(ORDERFILE_INSTRUMENTATION)
orderfile::StartDelayedDump();
#endif
#if BUILDFLAG(SUPPORTS_CODE_ORDERING)
if (CommandLine::ForCurrentProcess()->HasSwitch(
"log-native-library-residency")) {
NativeLibraryPrefetcher::MadviseForResidencyCollection();
} else if (IsUsingOrderfileOptimization()) {
NativeLibraryPrefetcher::MadviseForOrderfile();
}
#endif
if (g_native_initialization_hook &&
!g_native_initialization_hook(
static_cast<LibraryProcessType>(library_process_type)))
return false;
if (g_registration_callback &&
!g_registration_callback(
env, nullptr,
static_cast<LibraryProcessType>(library_process_type))) {
return false;
}
return true;
}
void LibraryLoaderExitHook() {
if (g_at_exit_manager) {
delete g_at_exit_manager;
g_at_exit_manager = nullptr;
}
}
void InitAtExitManager() {
g_at_exit_manager = new base::AtExitManager();
}
} // namespace android
} // namespace base
|
