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/xattr.h>
23 #include <unistd.h>
24
25 #include "ecmascript/log_wrapper.h"
26
27 #ifndef PR_SET_VMA
28 #define PR_SET_VMA 0x53564d41
29 #endif
30
31 #ifndef PR_SET_VMA_ANON_NAME
32 #define PR_SET_VMA_ANON_NAME 0
33 #endif
34
35 namespace panda::ecmascript {
MallocUsableSize(void * p)36 size_t MallocUsableSize(void *p)
37 {
38 return malloc_usable_size(p);
39 }
40
NumberOfCpuCore()41 uint32_t NumberOfCpuCore()
42 {
43 return static_cast<uint32_t>(sysconf(_SC_NPROCESSORS_ONLN));
44 }
45
PhysicalSize()46 size_t PhysicalSize()
47 {
48 auto pages = sysconf(_SC_PHYS_PAGES);
49 auto pageSize = sysconf(_SC_PAGE_SIZE);
50 return pages * pageSize;
51 }
52
PrctlSetVMA(const void * p,const size_t size,const char * tag)53 int PrctlSetVMA(const void *p, const size_t size, const char *tag)
54 {
55 return prctl(PR_SET_VMA, PR_SET_VMA_ANON_NAME, p, size, tag);
56 }
57
PtracePeektext(int pid,uintptr_t addr)58 long PtracePeektext(int pid, uintptr_t addr)
59 {
60 return ptrace(PTRACE_PEEKTEXT, pid, addr, NULL);
61 }
62
BindSmallCpuCore()63 void BindSmallCpuCore()
64 {
65 cpu_set_t cpuset;
66
67 CPU_ZERO(&cpuset);
68 CPU_SET(0, &cpuset); // 0: bind this process to cpu0
69 CPU_SET(1, &cpuset); // 1: bind this process to cpu1
70 CPU_SET(2, &cpuset); // 2: bind this process to cpu2
71 CPU_SET(3, &cpuset); // 3: bind this process to cpu3
72
73 if (sched_setaffinity(0, sizeof(cpuset), &cpuset) == -1) {
74 LOG_ECMA(ERROR) << "Set CPU affinity failed";
75 }
76 }
77
BindMidCpuCore()78 void BindMidCpuCore()
79 {
80 cpu_set_t cpuset;
81
82 CPU_ZERO(&cpuset);
83 for (size_t i = 0; i < 7; i++) { // 7: 0-3 little core, 4-6 mid core
84 CPU_SET(i, &cpuset);
85 }
86
87 if (sched_setaffinity(0, sizeof(cpuset), &cpuset) == -1) {
88 LOG_ECMA(ERROR) << "Set CPU affinity failed";
89 }
90 }
91
PageMapExecFortSpace(void * addr,size_t size,int prot)92 void *PageMapExecFortSpace(void *addr, size_t size, int prot)
93 {
94 void *res = mmap(addr, size, prot, MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED | MAP_EXECUTABLE, -1, 0);
95 if (res == MAP_FAILED) {
96 LOG_ECMA(ERROR) << "PageMapExecFortSpace mmap failed, addr = " << addr << ", size = " << size <<
97 ", prot = " << prot << ", error code is " << errno;
98 }
99 return res;
100 }
101
SetSecurityLabel(const std::string & path)102 void SetSecurityLabel(const std::string& path)
103 {
104 auto xattrValueSize = getxattr(path.c_str(), XATTR_KEY, nullptr, 0);
105 if (xattrValueSize == static_cast<ssize_t>(DEFAULT_DATA_LENGTH)) {
106 char xattrValue[DEFAULT_DATA_LENGTH + 1];
107 xattrValueSize = getxattr(path.c_str(), XATTR_KEY, xattrValue, xattrValueSize);
108 xattrValue[DEFAULT_DATA_LENGTH] = '\0';
109 }
110
111 if (setxattr(path.c_str(), XATTR_KEY, DEFAULT_DATA_LEVEL.data(), DEFAULT_DATA_LEVEL.size(), 0) < 0) {
112 LOG_ECMA(WARN) << "set label failed! level: " << DEFAULT_DATA_LEVEL << ", file: " << path;
113 }
114 }
115 } // namespace panda::ecmascript
116