1 /*
2 * Copyright (c) 2022 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16 #include "ecmascript/platform/os.h"
17
18 #include <malloc.h>
19 #include <sys/mman.h>
20 #include <sys/prctl.h>
21 #include <sys/ptrace.h>
22 #include <sys/statfs.h>
23 #include <sys/statvfs.h>
24 #include <sys/xattr.h>
25 #include <unistd.h>
26
27 #include "ecmascript/log_wrapper.h"
28
29 #ifndef PR_SET_VMA
30 #define PR_SET_VMA 0x53564d41
31 #endif
32
33 #ifndef PR_SET_VMA_ANON_NAME
34 #define PR_SET_VMA_ANON_NAME 0
35 #endif
36
37 #define JITFORT_QUERY_ENCAPS 'E'
38 #define HM_PR_SET_JITFORT 0x6a6974
39
40 namespace panda::ecmascript {
MallocUsableSize(void * p)41 size_t MallocUsableSize(void *p)
42 {
43 return malloc_usable_size(p);
44 }
45
PrctlSetVMA(const void * p,const size_t size,const char * tag)46 int PrctlSetVMA(const void *p, const size_t size, const char *tag)
47 {
48 return prctl(PR_SET_VMA, PR_SET_VMA_ANON_NAME, p, size, tag);
49 }
50
PtracePeektext(int pid,uintptr_t addr)51 long PtracePeektext(int pid, uintptr_t addr)
52 {
53 return ptrace(PTRACE_PEEKTEXT, pid, addr, NULL);
54 }
55
BindSmallCpuCore()56 void BindSmallCpuCore()
57 {
58 cpu_set_t cpuset;
59
60 CPU_ZERO(&cpuset);
61 CPU_SET(0, &cpuset); // 0: bind this thread to cpu0
62 CPU_SET(1, &cpuset); // 1: bind this thread to cpu1
63 CPU_SET(2, &cpuset); // 2: bind this thread to cpu2
64 CPU_SET(3, &cpuset); // 3: bind this thread to cpu3
65
66 if (sched_setaffinity(0, sizeof(cpuset), &cpuset) == -1) {
67 LOG_ECMA(ERROR) << "Set CPU affinity failed";
68 }
69 }
70
BindMidCpuCore()71 void BindMidCpuCore()
72 {
73 cpu_set_t cpuset;
74
75 CPU_ZERO(&cpuset);
76 for (size_t i = 0; i < 7; i++) { // 7: 0-3 little core, 4-6 mid core
77 CPU_SET(i, &cpuset);
78 }
79
80 if (sched_setaffinity(0, sizeof(cpuset), &cpuset) == -1) {
81 LOG_ECMA(ERROR) << "Set CPU affinity failed";
82 }
83 }
84
BindAllCpuCore()85 void BindAllCpuCore()
86 {
87 cpu_set_t cpuset;
88
89 CPU_ZERO(&cpuset);
90 for (size_t i = 0; i < common::NumberOfCpuCore(); i++) {
91 CPU_SET(i, &cpuset);
92 }
93
94 if (sched_setaffinity(0, sizeof(cpuset), &cpuset) == -1) {
95 LOG_ECMA(ERROR) << "Set CPU affinity failed";
96 }
97 }
98
PageMapExecFortSpace(void * addr,size_t size,int prot)99 void *PageMapExecFortSpace(void *addr, size_t size, int prot)
100 {
101 void *res = mmap(addr, size, prot, MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED | MAP_EXECUTABLE, -1, 0);
102 if (res == MAP_FAILED) {
103 LOG_ECMA(ERROR) << "PageMapExecFortSpace mmap failed, addr = " << addr << ", size = " << size <<
104 ", prot = " << prot << ", error code is " << errno;
105 }
106 return res;
107 }
108
HasJitFortACL()109 bool HasJitFortACL()
110 {
111 return (prctl(HM_PR_SET_JITFORT, JITFORT_QUERY_ENCAPS, 0) == 0);
112 }
113
SetSecurityLabel(const std::string & path)114 void SetSecurityLabel(const std::string& path)
115 {
116 auto xattrValueSize = getxattr(path.c_str(), XATTR_KEY, nullptr, 0);
117 if (xattrValueSize == static_cast<ssize_t>(DEFAULT_DATA_LENGTH)) {
118 char xattrValue[DEFAULT_DATA_LENGTH + 1];
119 xattrValueSize = getxattr(path.c_str(), XATTR_KEY, xattrValue, xattrValueSize);
120 xattrValue[DEFAULT_DATA_LENGTH] = '\0';
121 }
122
123 if (setxattr(path.c_str(), XATTR_KEY, DEFAULT_DATA_LEVEL.data(), DEFAULT_DATA_LEVEL.size(), 0) < 0) {
124 LOG_ECMA(WARN) << "set label failed! level: " << DEFAULT_DATA_LEVEL << ", file: " << path;
125 }
126 }
127
CheckDiskSpace(const std::string & path,size_t requiredBytes)128 bool CheckDiskSpace(const std::string& path, size_t requiredBytes)
129 {
130 struct statvfs stat;
131 if (statvfs(path.c_str(), &stat) != 0) {
132 return false;
133 }
134 size_t availableBytes = static_cast<size_t>(stat.f_bavail) * stat.f_frsize;
135 return availableBytes >= requiredBytes;
136 }
137
GetDeviceValidSize(const std::string & path)138 uint64_t GetDeviceValidSize(const std::string &path)
139 {
140 struct statfs stat;
141 if (statfs(path.c_str(), &stat) != 0) {
142 LOG_ECMA(ERROR) << "execute fail because it is not a partition " << path.c_str();
143 return 0;
144 }
145 constexpr uint64_t units = 1024;
146 uint64_t bfree = static_cast<uint64_t>(stat.f_bfree);
147 uint64_t bsize = static_cast<uint64_t>(stat.f_bsize);
148 if (bsize == 0 || bfree > UINT64_MAX / bsize) {
149 LOG_ECMA(ERROR) << "overflow detected: bfree * bsize";
150 return 0;
151 }
152 return (bfree * bsize) / (units * units);
153 }
154 } // namespace panda::ecmascript
155