1e483b020SAlexey Dobriyan /*
2e483b020SAlexey Dobriyan * Copyright (c) 2019 Alexey Dobriyan <adobriyan@gmail.com>
3e483b020SAlexey Dobriyan *
4e483b020SAlexey Dobriyan * Permission to use, copy, modify, and distribute this software for any
5e483b020SAlexey Dobriyan * purpose with or without fee is hereby granted, provided that the above
6e483b020SAlexey Dobriyan * copyright notice and this permission notice appear in all copies.
7e483b020SAlexey Dobriyan *
8e483b020SAlexey Dobriyan * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9e483b020SAlexey Dobriyan * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10e483b020SAlexey Dobriyan * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11e483b020SAlexey Dobriyan * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12e483b020SAlexey Dobriyan * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13e483b020SAlexey Dobriyan * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14e483b020SAlexey Dobriyan * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15e483b020SAlexey Dobriyan */
16e483b020SAlexey Dobriyan /*
17e483b020SAlexey Dobriyan * Fork and exec tiny 1 page executable which precisely controls its VM.
18e483b020SAlexey Dobriyan * Test /proc/$PID/maps
19e483b020SAlexey Dobriyan * Test /proc/$PID/smaps
20e483b020SAlexey Dobriyan * Test /proc/$PID/smaps_rollup
21e483b020SAlexey Dobriyan * Test /proc/$PID/statm
22e483b020SAlexey Dobriyan *
23e483b020SAlexey Dobriyan * FIXME require CONFIG_TMPFS which can be disabled
24e483b020SAlexey Dobriyan * FIXME test other values from "smaps"
25e483b020SAlexey Dobriyan * FIXME support other archs
26e483b020SAlexey Dobriyan */
27e483b020SAlexey Dobriyan #undef NDEBUG
28e483b020SAlexey Dobriyan #include <assert.h>
29e483b020SAlexey Dobriyan #include <errno.h>
30e483b020SAlexey Dobriyan #include <sched.h>
31e483b020SAlexey Dobriyan #include <signal.h>
3217415606SAlexey Dobriyan #include <stdbool.h>
33e483b020SAlexey Dobriyan #include <stdint.h>
34e483b020SAlexey Dobriyan #include <stdio.h>
35e483b020SAlexey Dobriyan #include <string.h>
36e483b020SAlexey Dobriyan #include <stdlib.h>
37e483b020SAlexey Dobriyan #include <sys/mount.h>
38e483b020SAlexey Dobriyan #include <sys/types.h>
39e483b020SAlexey Dobriyan #include <sys/stat.h>
4017415606SAlexey Dobriyan #include <sys/wait.h>
41e483b020SAlexey Dobriyan #include <fcntl.h>
42e483b020SAlexey Dobriyan #include <unistd.h>
43e483b020SAlexey Dobriyan #include <sys/syscall.h>
44e483b020SAlexey Dobriyan #include <sys/uio.h>
45e483b020SAlexey Dobriyan #include <linux/kdev_t.h>
4617415606SAlexey Dobriyan #include <sys/time.h>
4717415606SAlexey Dobriyan #include <sys/resource.h>
48e483b020SAlexey Dobriyan
491585b1b5SGuo Zhengkui #include "../kselftest.h"
501585b1b5SGuo Zhengkui
sys_execveat(int dirfd,const char * pathname,char ** argv,char ** envp,int flags)51e483b020SAlexey Dobriyan static inline long sys_execveat(int dirfd, const char *pathname, char **argv, char **envp, int flags)
52e483b020SAlexey Dobriyan {
53e483b020SAlexey Dobriyan return syscall(SYS_execveat, dirfd, pathname, argv, envp, flags);
54e483b020SAlexey Dobriyan }
55e483b020SAlexey Dobriyan
make_private_tmp(void)56e483b020SAlexey Dobriyan static void make_private_tmp(void)
57e483b020SAlexey Dobriyan {
58e483b020SAlexey Dobriyan if (unshare(CLONE_NEWNS) == -1) {
59e483b020SAlexey Dobriyan if (errno == ENOSYS || errno == EPERM) {
60e483b020SAlexey Dobriyan exit(4);
61e483b020SAlexey Dobriyan }
62e483b020SAlexey Dobriyan exit(1);
63e483b020SAlexey Dobriyan }
64e483b020SAlexey Dobriyan if (mount(NULL, "/", NULL, MS_PRIVATE|MS_REC, NULL) == -1) {
65e483b020SAlexey Dobriyan exit(1);
66e483b020SAlexey Dobriyan }
67e483b020SAlexey Dobriyan if (mount(NULL, "/tmp", "tmpfs", 0, NULL) == -1) {
68e483b020SAlexey Dobriyan exit(1);
69e483b020SAlexey Dobriyan }
70e483b020SAlexey Dobriyan }
71e483b020SAlexey Dobriyan
72e483b020SAlexey Dobriyan static pid_t pid = -1;
ate(void)73e483b020SAlexey Dobriyan static void ate(void)
74e483b020SAlexey Dobriyan {
75e483b020SAlexey Dobriyan if (pid > 0) {
76e483b020SAlexey Dobriyan kill(pid, SIGTERM);
77e483b020SAlexey Dobriyan }
78e483b020SAlexey Dobriyan }
79e483b020SAlexey Dobriyan
80e483b020SAlexey Dobriyan struct elf64_hdr {
81e483b020SAlexey Dobriyan uint8_t e_ident[16];
82e483b020SAlexey Dobriyan uint16_t e_type;
83e483b020SAlexey Dobriyan uint16_t e_machine;
84e483b020SAlexey Dobriyan uint32_t e_version;
85e483b020SAlexey Dobriyan uint64_t e_entry;
86e483b020SAlexey Dobriyan uint64_t e_phoff;
87e483b020SAlexey Dobriyan uint64_t e_shoff;
88e483b020SAlexey Dobriyan uint32_t e_flags;
89e483b020SAlexey Dobriyan uint16_t e_ehsize;
90e483b020SAlexey Dobriyan uint16_t e_phentsize;
91e483b020SAlexey Dobriyan uint16_t e_phnum;
92e483b020SAlexey Dobriyan uint16_t e_shentsize;
93e483b020SAlexey Dobriyan uint16_t e_shnum;
94e483b020SAlexey Dobriyan uint16_t e_shstrndx;
95e483b020SAlexey Dobriyan };
96e483b020SAlexey Dobriyan
97e483b020SAlexey Dobriyan struct elf64_phdr {
98e483b020SAlexey Dobriyan uint32_t p_type;
99e483b020SAlexey Dobriyan uint32_t p_flags;
100e483b020SAlexey Dobriyan uint64_t p_offset;
101e483b020SAlexey Dobriyan uint64_t p_vaddr;
102e483b020SAlexey Dobriyan uint64_t p_paddr;
103e483b020SAlexey Dobriyan uint64_t p_filesz;
104e483b020SAlexey Dobriyan uint64_t p_memsz;
105e483b020SAlexey Dobriyan uint64_t p_align;
106e483b020SAlexey Dobriyan };
107e483b020SAlexey Dobriyan
108e483b020SAlexey Dobriyan #ifdef __x86_64__
109e483b020SAlexey Dobriyan #define PAGE_SIZE 4096
110e483b020SAlexey Dobriyan #define VADDR (1UL << 32)
111e483b020SAlexey Dobriyan #define MAPS_OFFSET 73
112e483b020SAlexey Dobriyan
113e483b020SAlexey Dobriyan #define syscall 0x0f, 0x05
114e483b020SAlexey Dobriyan #define mov_rdi(x) \
115e483b020SAlexey Dobriyan 0x48, 0xbf, \
116e483b020SAlexey Dobriyan (x)&0xff, ((x)>>8)&0xff, ((x)>>16)&0xff, ((x)>>24)&0xff, \
117e483b020SAlexey Dobriyan ((x)>>32)&0xff, ((x)>>40)&0xff, ((x)>>48)&0xff, ((x)>>56)&0xff
118e483b020SAlexey Dobriyan
119e483b020SAlexey Dobriyan #define mov_rsi(x) \
120e483b020SAlexey Dobriyan 0x48, 0xbe, \
121e483b020SAlexey Dobriyan (x)&0xff, ((x)>>8)&0xff, ((x)>>16)&0xff, ((x)>>24)&0xff, \
122e483b020SAlexey Dobriyan ((x)>>32)&0xff, ((x)>>40)&0xff, ((x)>>48)&0xff, ((x)>>56)&0xff
123e483b020SAlexey Dobriyan
124e483b020SAlexey Dobriyan #define mov_eax(x) \
125e483b020SAlexey Dobriyan 0xb8, (x)&0xff, ((x)>>8)&0xff, ((x)>>16)&0xff, ((x)>>24)&0xff
126e483b020SAlexey Dobriyan
127e483b020SAlexey Dobriyan static const uint8_t payload[] = {
128e483b020SAlexey Dobriyan /* Casually unmap stack, vDSO and everything else. */
129e483b020SAlexey Dobriyan /* munmap */
130e483b020SAlexey Dobriyan mov_rdi(VADDR + 4096),
131e483b020SAlexey Dobriyan mov_rsi((1ULL << 47) - 4096 - VADDR - 4096),
132e483b020SAlexey Dobriyan mov_eax(11),
133e483b020SAlexey Dobriyan syscall,
134e483b020SAlexey Dobriyan
135e483b020SAlexey Dobriyan /* Ping parent. */
136e483b020SAlexey Dobriyan /* write(0, &c, 1); */
137e483b020SAlexey Dobriyan 0x31, 0xff, /* xor edi, edi */
138e483b020SAlexey Dobriyan 0x48, 0x8d, 0x35, 0x00, 0x00, 0x00, 0x00, /* lea rsi, [rip] */
139e483b020SAlexey Dobriyan 0xba, 0x01, 0x00, 0x00, 0x00, /* mov edx, 1 */
140e483b020SAlexey Dobriyan mov_eax(1),
141e483b020SAlexey Dobriyan syscall,
142e483b020SAlexey Dobriyan
143e483b020SAlexey Dobriyan /* 1: pause(); */
144e483b020SAlexey Dobriyan mov_eax(34),
145e483b020SAlexey Dobriyan syscall,
146e483b020SAlexey Dobriyan
147e483b020SAlexey Dobriyan 0xeb, 0xf7, /* jmp 1b */
148e483b020SAlexey Dobriyan };
149e483b020SAlexey Dobriyan
make_exe(const uint8_t * payload,size_t len)150e483b020SAlexey Dobriyan static int make_exe(const uint8_t *payload, size_t len)
151e483b020SAlexey Dobriyan {
152e483b020SAlexey Dobriyan struct elf64_hdr h;
153e483b020SAlexey Dobriyan struct elf64_phdr ph;
154e483b020SAlexey Dobriyan
155e483b020SAlexey Dobriyan struct iovec iov[3] = {
156e483b020SAlexey Dobriyan {&h, sizeof(struct elf64_hdr)},
157e483b020SAlexey Dobriyan {&ph, sizeof(struct elf64_phdr)},
158e483b020SAlexey Dobriyan {(void *)payload, len},
159e483b020SAlexey Dobriyan };
160e483b020SAlexey Dobriyan int fd, fd1;
161e483b020SAlexey Dobriyan char buf[64];
162e483b020SAlexey Dobriyan
163e483b020SAlexey Dobriyan memset(&h, 0, sizeof(h));
164e483b020SAlexey Dobriyan h.e_ident[0] = 0x7f;
165e483b020SAlexey Dobriyan h.e_ident[1] = 'E';
166e483b020SAlexey Dobriyan h.e_ident[2] = 'L';
167e483b020SAlexey Dobriyan h.e_ident[3] = 'F';
168e483b020SAlexey Dobriyan h.e_ident[4] = 2;
169e483b020SAlexey Dobriyan h.e_ident[5] = 1;
170e483b020SAlexey Dobriyan h.e_ident[6] = 1;
171e483b020SAlexey Dobriyan h.e_ident[7] = 0;
172e483b020SAlexey Dobriyan h.e_type = 2;
173e483b020SAlexey Dobriyan h.e_machine = 0x3e;
174e483b020SAlexey Dobriyan h.e_version = 1;
175e483b020SAlexey Dobriyan h.e_entry = VADDR + sizeof(struct elf64_hdr) + sizeof(struct elf64_phdr);
176e483b020SAlexey Dobriyan h.e_phoff = sizeof(struct elf64_hdr);
177e483b020SAlexey Dobriyan h.e_shoff = 0;
178e483b020SAlexey Dobriyan h.e_flags = 0;
179e483b020SAlexey Dobriyan h.e_ehsize = sizeof(struct elf64_hdr);
180e483b020SAlexey Dobriyan h.e_phentsize = sizeof(struct elf64_phdr);
181e483b020SAlexey Dobriyan h.e_phnum = 1;
182e483b020SAlexey Dobriyan h.e_shentsize = 0;
183e483b020SAlexey Dobriyan h.e_shnum = 0;
184e483b020SAlexey Dobriyan h.e_shstrndx = 0;
185e483b020SAlexey Dobriyan
186e483b020SAlexey Dobriyan memset(&ph, 0, sizeof(ph));
187e483b020SAlexey Dobriyan ph.p_type = 1;
188e483b020SAlexey Dobriyan ph.p_flags = (1<<2)|1;
189e483b020SAlexey Dobriyan ph.p_offset = 0;
190e483b020SAlexey Dobriyan ph.p_vaddr = VADDR;
191e483b020SAlexey Dobriyan ph.p_paddr = 0;
19268545aa1SAlexey Dobriyan ph.p_filesz = sizeof(struct elf64_hdr) + sizeof(struct elf64_phdr) + len;
19368545aa1SAlexey Dobriyan ph.p_memsz = sizeof(struct elf64_hdr) + sizeof(struct elf64_phdr) + len;
194e483b020SAlexey Dobriyan ph.p_align = 4096;
195e483b020SAlexey Dobriyan
196e483b020SAlexey Dobriyan fd = openat(AT_FDCWD, "/tmp", O_WRONLY|O_EXCL|O_TMPFILE, 0700);
197e483b020SAlexey Dobriyan if (fd == -1) {
198e483b020SAlexey Dobriyan exit(1);
199e483b020SAlexey Dobriyan }
200e483b020SAlexey Dobriyan
201e483b020SAlexey Dobriyan if (writev(fd, iov, 3) != sizeof(struct elf64_hdr) + sizeof(struct elf64_phdr) + len) {
202e483b020SAlexey Dobriyan exit(1);
203e483b020SAlexey Dobriyan }
204e483b020SAlexey Dobriyan
205e483b020SAlexey Dobriyan /* Avoid ETXTBSY on exec. */
206e483b020SAlexey Dobriyan snprintf(buf, sizeof(buf), "/proc/self/fd/%u", fd);
207e483b020SAlexey Dobriyan fd1 = open(buf, O_RDONLY|O_CLOEXEC);
208e483b020SAlexey Dobriyan close(fd);
209e483b020SAlexey Dobriyan
210e483b020SAlexey Dobriyan return fd1;
211e483b020SAlexey Dobriyan }
212e483b020SAlexey Dobriyan #endif
213e483b020SAlexey Dobriyan
2143adb2d87SAlexey Dobriyan /*
2153adb2d87SAlexey Dobriyan * 0: vsyscall VMA doesn't exist vsyscall=none
216f4068af3SBrian Foster * 1: vsyscall VMA is --xp vsyscall=xonly
217f4068af3SBrian Foster * 2: vsyscall VMA is r-xp vsyscall=emulate
2183adb2d87SAlexey Dobriyan */
219f4068af3SBrian Foster static volatile int g_vsyscall;
2203adb2d87SAlexey Dobriyan static const char *str_vsyscall;
22117415606SAlexey Dobriyan
2223adb2d87SAlexey Dobriyan static const char str_vsyscall_0[] = "";
2233adb2d87SAlexey Dobriyan static const char str_vsyscall_1[] =
2243adb2d87SAlexey Dobriyan "ffffffffff600000-ffffffffff601000 --xp 00000000 00:00 0 [vsyscall]\n";
225f4068af3SBrian Foster static const char str_vsyscall_2[] =
226f4068af3SBrian Foster "ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0 [vsyscall]\n";
22717415606SAlexey Dobriyan
228e483b020SAlexey Dobriyan #ifdef __x86_64__
sigaction_SIGSEGV(int _,siginfo_t * __,void * ___)229bca1eac5SAlexey Dobriyan static void sigaction_SIGSEGV(int _, siginfo_t *__, void *___)
230bca1eac5SAlexey Dobriyan {
231f4068af3SBrian Foster _exit(g_vsyscall);
232bca1eac5SAlexey Dobriyan }
233bca1eac5SAlexey Dobriyan
23417415606SAlexey Dobriyan /*
2353adb2d87SAlexey Dobriyan * vsyscall page can't be unmapped, probe it directly.
23617415606SAlexey Dobriyan */
vsyscall(void)23717415606SAlexey Dobriyan static void vsyscall(void)
23817415606SAlexey Dobriyan {
23917415606SAlexey Dobriyan pid_t pid;
24017415606SAlexey Dobriyan int wstatus;
24117415606SAlexey Dobriyan
24217415606SAlexey Dobriyan pid = fork();
24317415606SAlexey Dobriyan if (pid < 0) {
24417415606SAlexey Dobriyan fprintf(stderr, "fork, errno %d\n", errno);
24517415606SAlexey Dobriyan exit(1);
24617415606SAlexey Dobriyan }
24717415606SAlexey Dobriyan if (pid == 0) {
24817415606SAlexey Dobriyan struct rlimit rlim = {0, 0};
24917415606SAlexey Dobriyan (void)setrlimit(RLIMIT_CORE, &rlim);
250bca1eac5SAlexey Dobriyan
251bca1eac5SAlexey Dobriyan /* Hide "segfault at ffffffffff600000" messages. */
252bca1eac5SAlexey Dobriyan struct sigaction act;
253bca1eac5SAlexey Dobriyan memset(&act, 0, sizeof(struct sigaction));
254bca1eac5SAlexey Dobriyan act.sa_flags = SA_SIGINFO;
255bca1eac5SAlexey Dobriyan act.sa_sigaction = sigaction_SIGSEGV;
256bca1eac5SAlexey Dobriyan (void)sigaction(SIGSEGV, &act, NULL);
257bca1eac5SAlexey Dobriyan
258f4068af3SBrian Foster g_vsyscall = 0;
2593adb2d87SAlexey Dobriyan /* gettimeofday(NULL, NULL); */
260*5316a017SAlexey Dobriyan uint64_t rax = 0xffffffffff600000;
2613adb2d87SAlexey Dobriyan asm volatile (
262*5316a017SAlexey Dobriyan "call *%[rax]"
263*5316a017SAlexey Dobriyan : [rax] "+a" (rax)
264*5316a017SAlexey Dobriyan : "D" (NULL), "S" (NULL)
265*5316a017SAlexey Dobriyan : "rcx", "r11"
2663adb2d87SAlexey Dobriyan );
267f4068af3SBrian Foster
268f4068af3SBrian Foster g_vsyscall = 1;
269f4068af3SBrian Foster *(volatile int *)0xffffffffff600000UL;
270f4068af3SBrian Foster
271f4068af3SBrian Foster g_vsyscall = 2;
272f4068af3SBrian Foster exit(g_vsyscall);
2733adb2d87SAlexey Dobriyan }
2743adb2d87SAlexey Dobriyan waitpid(pid, &wstatus, 0);
275f4068af3SBrian Foster if (WIFEXITED(wstatus)) {
276f4068af3SBrian Foster g_vsyscall = WEXITSTATUS(wstatus);
2773adb2d87SAlexey Dobriyan } else {
278f4068af3SBrian Foster fprintf(stderr, "error: wstatus %08x\n", wstatus);
2793adb2d87SAlexey Dobriyan exit(1);
2803adb2d87SAlexey Dobriyan }
28117415606SAlexey Dobriyan }
28217415606SAlexey Dobriyan
main(void)283e483b020SAlexey Dobriyan int main(void)
284e483b020SAlexey Dobriyan {
285e483b020SAlexey Dobriyan int pipefd[2];
286e483b020SAlexey Dobriyan int exec_fd;
287e483b020SAlexey Dobriyan
28817415606SAlexey Dobriyan vsyscall();
2893adb2d87SAlexey Dobriyan switch (g_vsyscall) {
2903adb2d87SAlexey Dobriyan case 0:
2913adb2d87SAlexey Dobriyan str_vsyscall = str_vsyscall_0;
2923adb2d87SAlexey Dobriyan break;
2933adb2d87SAlexey Dobriyan case 1:
2943adb2d87SAlexey Dobriyan str_vsyscall = str_vsyscall_1;
2953adb2d87SAlexey Dobriyan break;
2963adb2d87SAlexey Dobriyan case 2:
2973adb2d87SAlexey Dobriyan str_vsyscall = str_vsyscall_2;
2983adb2d87SAlexey Dobriyan break;
2993adb2d87SAlexey Dobriyan default:
3003adb2d87SAlexey Dobriyan abort();
3013adb2d87SAlexey Dobriyan }
30217415606SAlexey Dobriyan
303e483b020SAlexey Dobriyan atexit(ate);
304e483b020SAlexey Dobriyan
305e483b020SAlexey Dobriyan make_private_tmp();
306e483b020SAlexey Dobriyan
307e483b020SAlexey Dobriyan /* Reserve fd 0 for 1-byte pipe ping from child. */
308e483b020SAlexey Dobriyan close(0);
309e483b020SAlexey Dobriyan if (open("/", O_RDONLY|O_DIRECTORY|O_PATH) != 0) {
310e483b020SAlexey Dobriyan return 1;
311e483b020SAlexey Dobriyan }
312e483b020SAlexey Dobriyan
313e483b020SAlexey Dobriyan exec_fd = make_exe(payload, sizeof(payload));
314e483b020SAlexey Dobriyan
315e483b020SAlexey Dobriyan if (pipe(pipefd) == -1) {
316e483b020SAlexey Dobriyan return 1;
317e483b020SAlexey Dobriyan }
318e483b020SAlexey Dobriyan if (dup2(pipefd[1], 0) != 0) {
319e483b020SAlexey Dobriyan return 1;
320e483b020SAlexey Dobriyan }
321e483b020SAlexey Dobriyan
322e483b020SAlexey Dobriyan pid = fork();
323e483b020SAlexey Dobriyan if (pid == -1) {
324e483b020SAlexey Dobriyan return 1;
325e483b020SAlexey Dobriyan }
326e483b020SAlexey Dobriyan if (pid == 0) {
327e483b020SAlexey Dobriyan sys_execveat(exec_fd, "", NULL, NULL, AT_EMPTY_PATH);
328e483b020SAlexey Dobriyan return 1;
329e483b020SAlexey Dobriyan }
330e483b020SAlexey Dobriyan
331e483b020SAlexey Dobriyan char _;
332e483b020SAlexey Dobriyan if (read(pipefd[0], &_, 1) != 1) {
333e483b020SAlexey Dobriyan return 1;
334e483b020SAlexey Dobriyan }
335e483b020SAlexey Dobriyan
336e483b020SAlexey Dobriyan struct stat st;
337e483b020SAlexey Dobriyan if (fstat(exec_fd, &st) == -1) {
338e483b020SAlexey Dobriyan return 1;
339e483b020SAlexey Dobriyan }
340e483b020SAlexey Dobriyan
341e483b020SAlexey Dobriyan /* Generate "head -n1 /proc/$PID/maps" */
342e483b020SAlexey Dobriyan char buf0[256];
343e483b020SAlexey Dobriyan memset(buf0, ' ', sizeof(buf0));
344e483b020SAlexey Dobriyan int len = snprintf(buf0, sizeof(buf0),
345e483b020SAlexey Dobriyan "%08lx-%08lx r-xp 00000000 %02lx:%02lx %llu",
346e483b020SAlexey Dobriyan VADDR, VADDR + PAGE_SIZE,
347e483b020SAlexey Dobriyan MAJOR(st.st_dev), MINOR(st.st_dev),
348e483b020SAlexey Dobriyan (unsigned long long)st.st_ino);
349e483b020SAlexey Dobriyan buf0[len] = ' ';
350e483b020SAlexey Dobriyan snprintf(buf0 + MAPS_OFFSET, sizeof(buf0) - MAPS_OFFSET,
351e483b020SAlexey Dobriyan "/tmp/#%llu (deleted)\n", (unsigned long long)st.st_ino);
352e483b020SAlexey Dobriyan
353e483b020SAlexey Dobriyan /* Test /proc/$PID/maps */
354e483b020SAlexey Dobriyan {
3553adb2d87SAlexey Dobriyan const size_t len = strlen(buf0) + strlen(str_vsyscall);
356e483b020SAlexey Dobriyan char buf[256];
357e483b020SAlexey Dobriyan ssize_t rv;
358e483b020SAlexey Dobriyan int fd;
359e483b020SAlexey Dobriyan
360e483b020SAlexey Dobriyan snprintf(buf, sizeof(buf), "/proc/%u/maps", pid);
361e483b020SAlexey Dobriyan fd = open(buf, O_RDONLY);
362e483b020SAlexey Dobriyan if (fd == -1) {
363e483b020SAlexey Dobriyan return 1;
364e483b020SAlexey Dobriyan }
365e483b020SAlexey Dobriyan rv = read(fd, buf, sizeof(buf));
36617415606SAlexey Dobriyan assert(rv == len);
367e483b020SAlexey Dobriyan assert(memcmp(buf, buf0, strlen(buf0)) == 0);
3683adb2d87SAlexey Dobriyan if (g_vsyscall > 0) {
36917415606SAlexey Dobriyan assert(memcmp(buf + strlen(buf0), str_vsyscall, strlen(str_vsyscall)) == 0);
37017415606SAlexey Dobriyan }
371e483b020SAlexey Dobriyan }
372e483b020SAlexey Dobriyan
373e483b020SAlexey Dobriyan /* Test /proc/$PID/smaps */
374e483b020SAlexey Dobriyan {
37517415606SAlexey Dobriyan char buf[4096];
376e483b020SAlexey Dobriyan ssize_t rv;
377e483b020SAlexey Dobriyan int fd;
378e483b020SAlexey Dobriyan
379e483b020SAlexey Dobriyan snprintf(buf, sizeof(buf), "/proc/%u/smaps", pid);
380e483b020SAlexey Dobriyan fd = open(buf, O_RDONLY);
381e483b020SAlexey Dobriyan if (fd == -1) {
382e483b020SAlexey Dobriyan return 1;
383e483b020SAlexey Dobriyan }
384e483b020SAlexey Dobriyan rv = read(fd, buf, sizeof(buf));
385e483b020SAlexey Dobriyan assert(0 <= rv && rv <= sizeof(buf));
386e483b020SAlexey Dobriyan
387e483b020SAlexey Dobriyan assert(rv >= strlen(buf0));
388e483b020SAlexey Dobriyan assert(memcmp(buf, buf0, strlen(buf0)) == 0);
389e483b020SAlexey Dobriyan
390e483b020SAlexey Dobriyan #define RSS1 "Rss: 4 kB\n"
391e483b020SAlexey Dobriyan #define RSS2 "Rss: 0 kB\n"
392e483b020SAlexey Dobriyan #define PSS1 "Pss: 4 kB\n"
393e483b020SAlexey Dobriyan #define PSS2 "Pss: 0 kB\n"
394e483b020SAlexey Dobriyan assert(memmem(buf, rv, RSS1, strlen(RSS1)) ||
395e483b020SAlexey Dobriyan memmem(buf, rv, RSS2, strlen(RSS2)));
396e483b020SAlexey Dobriyan assert(memmem(buf, rv, PSS1, strlen(PSS1)) ||
397e483b020SAlexey Dobriyan memmem(buf, rv, PSS2, strlen(PSS2)));
398e483b020SAlexey Dobriyan
399e483b020SAlexey Dobriyan static const char *S[] = {
400e483b020SAlexey Dobriyan "Size: 4 kB\n",
401e483b020SAlexey Dobriyan "KernelPageSize: 4 kB\n",
402e483b020SAlexey Dobriyan "MMUPageSize: 4 kB\n",
403e483b020SAlexey Dobriyan "Anonymous: 0 kB\n",
404e483b020SAlexey Dobriyan "AnonHugePages: 0 kB\n",
405e483b020SAlexey Dobriyan "Shared_Hugetlb: 0 kB\n",
406e483b020SAlexey Dobriyan "Private_Hugetlb: 0 kB\n",
407e483b020SAlexey Dobriyan "Locked: 0 kB\n",
408e483b020SAlexey Dobriyan };
409e483b020SAlexey Dobriyan int i;
410e483b020SAlexey Dobriyan
4111585b1b5SGuo Zhengkui for (i = 0; i < ARRAY_SIZE(S); i++) {
412e483b020SAlexey Dobriyan assert(memmem(buf, rv, S[i], strlen(S[i])));
413e483b020SAlexey Dobriyan }
41417415606SAlexey Dobriyan
4153adb2d87SAlexey Dobriyan if (g_vsyscall > 0) {
41617415606SAlexey Dobriyan assert(memmem(buf, rv, str_vsyscall, strlen(str_vsyscall)));
41717415606SAlexey Dobriyan }
418e483b020SAlexey Dobriyan }
419e483b020SAlexey Dobriyan
420e483b020SAlexey Dobriyan /* Test /proc/$PID/smaps_rollup */
421e483b020SAlexey Dobriyan {
422e483b020SAlexey Dobriyan char bufr[256];
423e483b020SAlexey Dobriyan memset(bufr, ' ', sizeof(bufr));
424e483b020SAlexey Dobriyan len = snprintf(bufr, sizeof(bufr),
425e483b020SAlexey Dobriyan "%08lx-%08lx ---p 00000000 00:00 0",
426e483b020SAlexey Dobriyan VADDR, VADDR + PAGE_SIZE);
427e483b020SAlexey Dobriyan bufr[len] = ' ';
428e483b020SAlexey Dobriyan snprintf(bufr + MAPS_OFFSET, sizeof(bufr) - MAPS_OFFSET,
429e483b020SAlexey Dobriyan "[rollup]\n");
430e483b020SAlexey Dobriyan
431e483b020SAlexey Dobriyan char buf[1024];
432e483b020SAlexey Dobriyan ssize_t rv;
433e483b020SAlexey Dobriyan int fd;
434e483b020SAlexey Dobriyan
435e483b020SAlexey Dobriyan snprintf(buf, sizeof(buf), "/proc/%u/smaps_rollup", pid);
436e483b020SAlexey Dobriyan fd = open(buf, O_RDONLY);
437e483b020SAlexey Dobriyan if (fd == -1) {
438e483b020SAlexey Dobriyan return 1;
439e483b020SAlexey Dobriyan }
440e483b020SAlexey Dobriyan rv = read(fd, buf, sizeof(buf));
441e483b020SAlexey Dobriyan assert(0 <= rv && rv <= sizeof(buf));
442e483b020SAlexey Dobriyan
443e483b020SAlexey Dobriyan assert(rv >= strlen(bufr));
444e483b020SAlexey Dobriyan assert(memcmp(buf, bufr, strlen(bufr)) == 0);
445e483b020SAlexey Dobriyan
446e483b020SAlexey Dobriyan assert(memmem(buf, rv, RSS1, strlen(RSS1)) ||
447e483b020SAlexey Dobriyan memmem(buf, rv, RSS2, strlen(RSS2)));
448e483b020SAlexey Dobriyan assert(memmem(buf, rv, PSS1, strlen(PSS1)) ||
449e483b020SAlexey Dobriyan memmem(buf, rv, PSS2, strlen(PSS2)));
450e483b020SAlexey Dobriyan
451e483b020SAlexey Dobriyan static const char *S[] = {
452e483b020SAlexey Dobriyan "Anonymous: 0 kB\n",
453e483b020SAlexey Dobriyan "AnonHugePages: 0 kB\n",
454e483b020SAlexey Dobriyan "Shared_Hugetlb: 0 kB\n",
455e483b020SAlexey Dobriyan "Private_Hugetlb: 0 kB\n",
456e483b020SAlexey Dobriyan "Locked: 0 kB\n",
457e483b020SAlexey Dobriyan };
458e483b020SAlexey Dobriyan int i;
459e483b020SAlexey Dobriyan
4601585b1b5SGuo Zhengkui for (i = 0; i < ARRAY_SIZE(S); i++) {
461e483b020SAlexey Dobriyan assert(memmem(buf, rv, S[i], strlen(S[i])));
462e483b020SAlexey Dobriyan }
463e483b020SAlexey Dobriyan }
464e483b020SAlexey Dobriyan
465e483b020SAlexey Dobriyan /* Test /proc/$PID/statm */
466e483b020SAlexey Dobriyan {
467e483b020SAlexey Dobriyan char buf[64];
468e483b020SAlexey Dobriyan ssize_t rv;
469e483b020SAlexey Dobriyan int fd;
470e483b020SAlexey Dobriyan
471e483b020SAlexey Dobriyan snprintf(buf, sizeof(buf), "/proc/%u/statm", pid);
472e483b020SAlexey Dobriyan fd = open(buf, O_RDONLY);
473e483b020SAlexey Dobriyan if (fd == -1) {
474e483b020SAlexey Dobriyan return 1;
475e483b020SAlexey Dobriyan }
476e483b020SAlexey Dobriyan rv = read(fd, buf, sizeof(buf));
477e483b020SAlexey Dobriyan assert(rv == 7 * 2);
478e483b020SAlexey Dobriyan
479e483b020SAlexey Dobriyan assert(buf[0] == '1'); /* ->total_vm */
480e483b020SAlexey Dobriyan assert(buf[1] == ' ');
481e483b020SAlexey Dobriyan assert(buf[2] == '0' || buf[2] == '1'); /* rss */
482e483b020SAlexey Dobriyan assert(buf[3] == ' ');
483e483b020SAlexey Dobriyan assert(buf[4] == '0' || buf[2] == '1'); /* file rss */
484e483b020SAlexey Dobriyan assert(buf[5] == ' ');
485e483b020SAlexey Dobriyan assert(buf[6] == '1'); /* ELF executable segments */
486e483b020SAlexey Dobriyan assert(buf[7] == ' ');
487e483b020SAlexey Dobriyan assert(buf[8] == '0');
488e483b020SAlexey Dobriyan assert(buf[9] == ' ');
489e483b020SAlexey Dobriyan assert(buf[10] == '0'); /* ->data_vm + ->stack_vm */
490e483b020SAlexey Dobriyan assert(buf[11] == ' ');
491e483b020SAlexey Dobriyan assert(buf[12] == '0');
492e483b020SAlexey Dobriyan assert(buf[13] == '\n');
493e483b020SAlexey Dobriyan }
494e483b020SAlexey Dobriyan
495e483b020SAlexey Dobriyan return 0;
496e483b020SAlexey Dobriyan }
497e483b020SAlexey Dobriyan #else
main(void)498e483b020SAlexey Dobriyan int main(void)
499e483b020SAlexey Dobriyan {
500e483b020SAlexey Dobriyan return 4;
501e483b020SAlexey Dobriyan }
502e483b020SAlexey Dobriyan #endif
503