linuxdebug/tools/testing/selftests/nolibc/nolibc-test.c

787 lines
23 KiB
C

// SPDX-License-Identifier: GPL-2.0
#define _GNU_SOURCE
/* platform-specific include files coming from the compiler */
#include <limits.h>
/* libc-specific include files
* The program may be built in 3 ways:
* $(CC) -nostdlib -include /path/to/nolibc.h => NOLIBC already defined
* $(CC) -nostdlib -I/path/to/nolibc/sysroot => _NOLIBC_* guards are present
* $(CC) with default libc => NOLIBC* never defined
*/
#ifndef NOLIBC
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifndef _NOLIBC_STDIO_H
/* standard libcs need more includes */
#include <linux/reboot.h>
#include <sys/io.h>
#include <sys/ioctl.h>
#include <sys/mount.h>
#include <sys/reboot.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <sys/sysmacros.h>
#include <sys/time.h>
#include <sys/wait.h>
#include <dirent.h>
#include <errno.h>
#include <fcntl.h>
#include <poll.h>
#include <sched.h>
#include <signal.h>
#include <stdarg.h>
#include <unistd.h>
#endif
#endif
/* will be used by nolibc by getenv() */
char **environ;
/* definition of a series of tests */
struct test {
const char *name; // test name
int (*func)(int min, int max); // handler
};
#ifndef _NOLIBC_STDLIB_H
char *itoa(int i)
{
static char buf[12];
int ret;
ret = snprintf(buf, sizeof(buf), "%d", i);
return (ret >= 0 && ret < sizeof(buf)) ? buf : "#err";
}
#endif
#define CASE_ERR(err) \
case err: return #err
/* returns the error name (e.g. "ENOENT") for common errors, "SUCCESS" for 0,
* or the decimal value for less common ones.
*/
const char *errorname(int err)
{
switch (err) {
case 0: return "SUCCESS";
CASE_ERR(EPERM);
CASE_ERR(ENOENT);
CASE_ERR(ESRCH);
CASE_ERR(EINTR);
CASE_ERR(EIO);
CASE_ERR(ENXIO);
CASE_ERR(E2BIG);
CASE_ERR(ENOEXEC);
CASE_ERR(EBADF);
CASE_ERR(ECHILD);
CASE_ERR(EAGAIN);
CASE_ERR(ENOMEM);
CASE_ERR(EACCES);
CASE_ERR(EFAULT);
CASE_ERR(ENOTBLK);
CASE_ERR(EBUSY);
CASE_ERR(EEXIST);
CASE_ERR(EXDEV);
CASE_ERR(ENODEV);
CASE_ERR(ENOTDIR);
CASE_ERR(EISDIR);
CASE_ERR(EINVAL);
CASE_ERR(ENFILE);
CASE_ERR(EMFILE);
CASE_ERR(ENOTTY);
CASE_ERR(ETXTBSY);
CASE_ERR(EFBIG);
CASE_ERR(ENOSPC);
CASE_ERR(ESPIPE);
CASE_ERR(EROFS);
CASE_ERR(EMLINK);
CASE_ERR(EPIPE);
CASE_ERR(EDOM);
CASE_ERR(ERANGE);
CASE_ERR(ENOSYS);
default:
return itoa(err);
}
}
static int pad_spc(int llen, int cnt, const char *fmt, ...)
{
va_list args;
int len;
int ret;
for (len = 0; len < cnt - llen; len++)
putchar(' ');
va_start(args, fmt);
ret = vfprintf(stdout, fmt, args);
va_end(args);
return ret < 0 ? ret : ret + len;
}
/* The tests below are intended to be used by the macroes, which evaluate
* expression <expr>, print the status to stdout, and update the "ret"
* variable to count failures. The functions themselves return the number
* of failures, thus either 0 or 1.
*/
#define EXPECT_ZR(cond, expr) \
do { if (!cond) pad_spc(llen, 40, "[SKIPPED]\n"); else ret += expect_zr(expr, llen); } while (0)
static int expect_zr(int expr, int llen)
{
int ret = !(expr == 0);
llen += printf(" = %d ", expr);
pad_spc(llen, 40, ret ? "[FAIL]\n" : " [OK]\n");
return ret;
}
#define EXPECT_NZ(cond, expr, val) \
do { if (!cond) pad_spc(llen, 40, "[SKIPPED]\n"); else ret += expect_nz(expr, llen; } while (0)
static int expect_nz(int expr, int llen)
{
int ret = !(expr != 0);
llen += printf(" = %d ", expr);
pad_spc(llen, 40, ret ? "[FAIL]\n" : " [OK]\n");
return ret;
}
#define EXPECT_EQ(cond, expr, val) \
do { if (!cond) pad_spc(llen, 40, "[SKIPPED]\n"); else ret += expect_eq(expr, llen, val); } while (0)
static int expect_eq(int expr, int llen, int val)
{
int ret = !(expr == val);
llen += printf(" = %d ", expr);
pad_spc(llen, 40, ret ? "[FAIL]\n" : " [OK]\n");
return ret;
}
#define EXPECT_NE(cond, expr, val) \
do { if (!cond) pad_spc(llen, 40, "[SKIPPED]\n"); else ret += expect_ne(expr, llen, val); } while (0)
static int expect_ne(int expr, int llen, int val)
{
int ret = !(expr != val);
llen += printf(" = %d ", expr);
pad_spc(llen, 40, ret ? "[FAIL]\n" : " [OK]\n");
return ret;
}
#define EXPECT_GE(cond, expr, val) \
do { if (!cond) pad_spc(llen, 40, "[SKIPPED]\n"); else ret += expect_ge(expr, llen, val); } while (0)
static int expect_ge(int expr, int llen, int val)
{
int ret = !(expr >= val);
llen += printf(" = %d ", expr);
pad_spc(llen, 40, ret ? "[FAIL]\n" : " [OK]\n");
return ret;
}
#define EXPECT_GT(cond, expr, val) \
do { if (!cond) pad_spc(llen, 40, "[SKIPPED]\n"); else ret += expect_gt(expr, llen, val); } while (0)
static int expect_gt(int expr, int llen, int val)
{
int ret = !(expr > val);
llen += printf(" = %d ", expr);
pad_spc(llen, 40, ret ? "[FAIL]\n" : " [OK]\n");
return ret;
}
#define EXPECT_LE(cond, expr, val) \
do { if (!cond) pad_spc(llen, 40, "[SKIPPED]\n"); else ret += expect_le(expr, llen, val); } while (0)
static int expect_le(int expr, int llen, int val)
{
int ret = !(expr <= val);
llen += printf(" = %d ", expr);
pad_spc(llen, 40, ret ? "[FAIL]\n" : " [OK]\n");
return ret;
}
#define EXPECT_LT(cond, expr, val) \
do { if (!cond) pad_spc(llen, 40, "[SKIPPED]\n"); else ret += expect_lt(expr, llen, val); } while (0)
static int expect_lt(int expr, int llen, int val)
{
int ret = !(expr < val);
llen += printf(" = %d ", expr);
pad_spc(llen, 40, ret ? "[FAIL]\n" : " [OK]\n");
return ret;
}
#define EXPECT_SYSZR(cond, expr) \
do { if (!cond) pad_spc(llen, 40, "[SKIPPED]\n"); else ret += expect_syszr(expr, llen); } while (0)
static int expect_syszr(int expr, int llen)
{
int ret = 0;
if (expr) {
ret = 1;
llen += printf(" = %d %s ", expr, errorname(errno));
llen += pad_spc(llen, 40, "[FAIL]\n");
} else {
llen += printf(" = %d ", expr);
llen += pad_spc(llen, 40, " [OK]\n");
}
return ret;
}
#define EXPECT_SYSEQ(cond, expr, val) \
do { if (!cond) pad_spc(llen, 40, "[SKIPPED]\n"); else ret += expect_syseq(expr, llen, val); } while (0)
static int expect_syseq(int expr, int llen, int val)
{
int ret = 0;
if (expr != val) {
ret = 1;
llen += printf(" = %d %s ", expr, errorname(errno));
llen += pad_spc(llen, 40, "[FAIL]\n");
} else {
llen += printf(" = %d ", expr);
llen += pad_spc(llen, 40, " [OK]\n");
}
return ret;
}
#define EXPECT_SYSNE(cond, expr, val) \
do { if (!cond) pad_spc(llen, 40, "[SKIPPED]\n"); else ret += expect_sysne(expr, llen, val); } while (0)
static int expect_sysne(int expr, int llen, int val)
{
int ret = 0;
if (expr == val) {
ret = 1;
llen += printf(" = %d %s ", expr, errorname(errno));
llen += pad_spc(llen, 40, "[FAIL]\n");
} else {
llen += printf(" = %d ", expr);
llen += pad_spc(llen, 40, " [OK]\n");
}
return ret;
}
#define EXPECT_SYSER(cond, expr, expret, experr) \
do { if (!cond) pad_spc(llen, 40, "[SKIPPED]\n"); else ret += expect_syserr(expr, expret, experr, llen); } while (0)
static int expect_syserr(int expr, int expret, int experr, int llen)
{
int ret = 0;
int _errno = errno;
llen += printf(" = %d %s ", expr, errorname(_errno));
if (expr != expret || _errno != experr) {
ret = 1;
llen += printf(" != (%d %s) ", expret, errorname(experr));
llen += pad_spc(llen, 40, "[FAIL]\n");
} else {
llen += pad_spc(llen, 40, " [OK]\n");
}
return ret;
}
#define EXPECT_PTRZR(cond, expr) \
do { if (!cond) pad_spc(llen, 40, "[SKIPPED]\n"); else ret += expect_ptrzr(expr, llen); } while (0)
static int expect_ptrzr(const void *expr, int llen)
{
int ret = 0;
llen += printf(" = <%p> ", expr);
if (expr) {
ret = 1;
llen += pad_spc(llen, 40, "[FAIL]\n");
} else {
llen += pad_spc(llen, 40, " [OK]\n");
}
return ret;
}
#define EXPECT_PTRNZ(cond, expr) \
do { if (!cond) pad_spc(llen, 40, "[SKIPPED]\n"); else ret += expect_ptrnz(expr, llen); } while (0)
static int expect_ptrnz(const void *expr, int llen)
{
int ret = 0;
llen += printf(" = <%p> ", expr);
if (!expr) {
ret = 1;
llen += pad_spc(llen, 40, "[FAIL]\n");
} else {
llen += pad_spc(llen, 40, " [OK]\n");
}
return ret;
}
#define EXPECT_STRZR(cond, expr) \
do { if (!cond) pad_spc(llen, 40, "[SKIPPED]\n"); else ret += expect_strzr(expr, llen); } while (0)
static int expect_strzr(const char *expr, int llen)
{
int ret = 0;
llen += printf(" = <%s> ", expr);
if (expr) {
ret = 1;
llen += pad_spc(llen, 40, "[FAIL]\n");
} else {
llen += pad_spc(llen, 40, " [OK]\n");
}
return ret;
}
#define EXPECT_STRNZ(cond, expr) \
do { if (!cond) pad_spc(llen, 40, "[SKIPPED]\n"); else ret += expect_strnz(expr, llen); } while (0)
static int expect_strnz(const char *expr, int llen)
{
int ret = 0;
llen += printf(" = <%s> ", expr);
if (!expr) {
ret = 1;
llen += pad_spc(llen, 40, "[FAIL]\n");
} else {
llen += pad_spc(llen, 40, " [OK]\n");
}
return ret;
}
#define EXPECT_STREQ(cond, expr, cmp) \
do { if (!cond) pad_spc(llen, 40, "[SKIPPED]\n"); else ret += expect_streq(expr, llen, cmp); } while (0)
static int expect_streq(const char *expr, int llen, const char *cmp)
{
int ret = 0;
llen += printf(" = <%s> ", expr);
if (strcmp(expr, cmp) != 0) {
ret = 1;
llen += pad_spc(llen, 40, "[FAIL]\n");
} else {
llen += pad_spc(llen, 40, " [OK]\n");
}
return ret;
}
#define EXPECT_STRNE(cond, expr, cmp) \
do { if (!cond) pad_spc(llen, 40, "[SKIPPED]\n"); else ret += expect_strne(expr, llen, cmp); } while (0)
static int expect_strne(const char *expr, int llen, const char *cmp)
{
int ret = 0;
llen += printf(" = <%s> ", expr);
if (strcmp(expr, cmp) == 0) {
ret = 1;
llen += pad_spc(llen, 40, "[FAIL]\n");
} else {
llen += pad_spc(llen, 40, " [OK]\n");
}
return ret;
}
/* declare tests based on line numbers. There must be exactly one test per line. */
#define CASE_TEST(name) \
case __LINE__: llen += printf("%d %s", test, #name);
/* used by some syscall tests below */
int test_getdents64(const char *dir)
{
char buffer[4096];
int fd, ret;
int err;
ret = fd = open(dir, O_RDONLY | O_DIRECTORY, 0);
if (ret < 0)
return ret;
ret = getdents64(fd, (void *)buffer, sizeof(buffer));
err = errno;
close(fd);
errno = err;
return ret;
}
/* Run syscall tests between IDs <min> and <max>.
* Return 0 on success, non-zero on failure.
*/
int run_syscall(int min, int max)
{
struct stat stat_buf;
int proc;
int test;
int tmp;
int ret = 0;
void *p1, *p2;
/* <proc> indicates whether or not /proc is mounted */
proc = stat("/proc", &stat_buf) == 0;
for (test = min; test >= 0 && test <= max; test++) {
int llen = 0; // line length
/* avoid leaving empty lines below, this will insert holes into
* test numbers.
*/
switch (test + __LINE__ + 1) {
CASE_TEST(getpid); EXPECT_SYSNE(1, getpid(), -1); break;
CASE_TEST(getppid); EXPECT_SYSNE(1, getppid(), -1); break;
#ifdef NOLIBC
CASE_TEST(gettid); EXPECT_SYSNE(1, gettid(), -1); break;
#endif
CASE_TEST(getpgid_self); EXPECT_SYSNE(1, getpgid(0), -1); break;
CASE_TEST(getpgid_bad); EXPECT_SYSER(1, getpgid(-1), -1, ESRCH); break;
CASE_TEST(kill_0); EXPECT_SYSZR(1, kill(getpid(), 0)); break;
CASE_TEST(kill_CONT); EXPECT_SYSZR(1, kill(getpid(), 0)); break;
CASE_TEST(kill_BADPID); EXPECT_SYSER(1, kill(INT_MAX, 0), -1, ESRCH); break;
CASE_TEST(sbrk); if ((p1 = p2 = sbrk(4096)) != (void *)-1) p2 = sbrk(-4096); EXPECT_SYSZR(1, (p2 == (void *)-1) || p2 == p1); break;
CASE_TEST(brk); EXPECT_SYSZR(1, brk(sbrk(0))); break;
CASE_TEST(chdir_root); EXPECT_SYSZR(1, chdir("/")); break;
CASE_TEST(chdir_dot); EXPECT_SYSZR(1, chdir(".")); break;
CASE_TEST(chdir_blah); EXPECT_SYSER(1, chdir("/blah"), -1, ENOENT); break;
CASE_TEST(chmod_net); EXPECT_SYSZR(proc, chmod("/proc/self/net", 0555)); break;
CASE_TEST(chmod_self); EXPECT_SYSER(proc, chmod("/proc/self", 0555), -1, EPERM); break;
CASE_TEST(chown_self); EXPECT_SYSER(proc, chown("/proc/self", 0, 0), -1, EPERM); break;
CASE_TEST(chroot_root); EXPECT_SYSZR(1, chroot("/")); break;
CASE_TEST(chroot_blah); EXPECT_SYSER(1, chroot("/proc/self/blah"), -1, ENOENT); break;
CASE_TEST(chroot_exe); EXPECT_SYSER(proc, chroot("/proc/self/exe"), -1, ENOTDIR); break;
CASE_TEST(close_m1); EXPECT_SYSER(1, close(-1), -1, EBADF); break;
CASE_TEST(close_dup); EXPECT_SYSZR(1, close(dup(0))); break;
CASE_TEST(dup_0); tmp = dup(0); EXPECT_SYSNE(1, tmp, -1); close(tmp); break;
CASE_TEST(dup_m1); tmp = dup(-1); EXPECT_SYSER(1, tmp, -1, EBADF); if (tmp != -1) close(tmp); break;
CASE_TEST(dup2_0); tmp = dup2(0, 100); EXPECT_SYSNE(1, tmp, -1); close(tmp); break;
CASE_TEST(dup2_m1); tmp = dup2(-1, 100); EXPECT_SYSER(1, tmp, -1, EBADF); if (tmp != -1) close(tmp); break;
CASE_TEST(dup3_0); tmp = dup3(0, 100, 0); EXPECT_SYSNE(1, tmp, -1); close(tmp); break;
CASE_TEST(dup3_m1); tmp = dup3(-1, 100, 0); EXPECT_SYSER(1, tmp, -1, EBADF); if (tmp != -1) close(tmp); break;
CASE_TEST(execve_root); EXPECT_SYSER(1, execve("/", (char*[]){ [0] = "/", [1] = NULL }, NULL), -1, EACCES); break;
CASE_TEST(getdents64_root); EXPECT_SYSNE(1, test_getdents64("/"), -1); break;
CASE_TEST(getdents64_null); EXPECT_SYSER(1, test_getdents64("/dev/null"), -1, ENOTDIR); break;
CASE_TEST(gettimeofday_null); EXPECT_SYSZR(1, gettimeofday(NULL, NULL)); break;
#ifdef NOLIBC
CASE_TEST(gettimeofday_bad1); EXPECT_SYSER(1, gettimeofday((void *)1, NULL), -1, EFAULT); break;
CASE_TEST(gettimeofday_bad2); EXPECT_SYSER(1, gettimeofday(NULL, (void *)1), -1, EFAULT); break;
CASE_TEST(gettimeofday_bad2); EXPECT_SYSER(1, gettimeofday(NULL, (void *)1), -1, EFAULT); break;
#endif
CASE_TEST(ioctl_tiocinq); EXPECT_SYSZR(1, ioctl(0, TIOCINQ, &tmp)); break;
CASE_TEST(ioctl_tiocinq); EXPECT_SYSZR(1, ioctl(0, TIOCINQ, &tmp)); break;
CASE_TEST(link_root1); EXPECT_SYSER(1, link("/", "/"), -1, EEXIST); break;
CASE_TEST(link_blah); EXPECT_SYSER(1, link("/proc/self/blah", "/blah"), -1, ENOENT); break;
CASE_TEST(link_dir); EXPECT_SYSER(1, link("/", "/blah"), -1, EPERM); break;
CASE_TEST(link_cross); EXPECT_SYSER(proc, link("/proc/self/net", "/blah"), -1, EXDEV); break;
CASE_TEST(lseek_m1); EXPECT_SYSER(1, lseek(-1, 0, SEEK_SET), -1, EBADF); break;
CASE_TEST(lseek_0); EXPECT_SYSER(1, lseek(0, 0, SEEK_SET), -1, ESPIPE); break;
CASE_TEST(mkdir_root); EXPECT_SYSER(1, mkdir("/", 0755), -1, EEXIST); break;
CASE_TEST(open_tty); EXPECT_SYSNE(1, tmp = open("/dev/null", 0), -1); if (tmp != -1) close(tmp); break;
CASE_TEST(open_blah); EXPECT_SYSER(1, tmp = open("/proc/self/blah", 0), -1, ENOENT); if (tmp != -1) close(tmp); break;
CASE_TEST(poll_null); EXPECT_SYSZR(1, poll(NULL, 0, 0)); break;
CASE_TEST(poll_stdout); EXPECT_SYSNE(1, ({ struct pollfd fds = { 1, POLLOUT, 0}; poll(&fds, 1, 0); }), -1); break;
CASE_TEST(poll_fault); EXPECT_SYSER(1, poll((void *)1, 1, 0), -1, EFAULT); break;
CASE_TEST(read_badf); EXPECT_SYSER(1, read(-1, &tmp, 1), -1, EBADF); break;
CASE_TEST(sched_yield); EXPECT_SYSZR(1, sched_yield()); break;
CASE_TEST(select_null); EXPECT_SYSZR(1, ({ struct timeval tv = { 0 }; select(0, NULL, NULL, NULL, &tv); })); break;
CASE_TEST(select_stdout); EXPECT_SYSNE(1, ({ fd_set fds; FD_ZERO(&fds); FD_SET(1, &fds); select(2, NULL, &fds, NULL, NULL); }), -1); break;
CASE_TEST(select_fault); EXPECT_SYSER(1, select(1, (void *)1, NULL, NULL, 0), -1, EFAULT); break;
CASE_TEST(stat_blah); EXPECT_SYSER(1, stat("/proc/self/blah", &stat_buf), -1, ENOENT); break;
CASE_TEST(stat_fault); EXPECT_SYSER(1, stat(NULL, &stat_buf), -1, EFAULT); break;
CASE_TEST(symlink_root); EXPECT_SYSER(1, symlink("/", "/"), -1, EEXIST); break;
CASE_TEST(unlink_root); EXPECT_SYSER(1, unlink("/"), -1, EISDIR); break;
CASE_TEST(unlink_blah); EXPECT_SYSER(1, unlink("/proc/self/blah"), -1, ENOENT); break;
CASE_TEST(wait_child); EXPECT_SYSER(1, wait(&tmp), -1, ECHILD); break;
CASE_TEST(waitpid_min); EXPECT_SYSER(1, waitpid(INT_MIN, &tmp, WNOHANG), -1, ESRCH); break;
CASE_TEST(waitpid_child); EXPECT_SYSER(1, waitpid(getpid(), &tmp, WNOHANG), -1, ECHILD); break;
CASE_TEST(write_badf); EXPECT_SYSER(1, write(-1, &tmp, 1), -1, EBADF); break;
CASE_TEST(write_zero); EXPECT_SYSZR(1, write(1, &tmp, 0)); break;
case __LINE__:
return ret; /* must be last */
/* note: do not set any defaults so as to permit holes above */
}
}
return ret;
}
int run_stdlib(int min, int max)
{
int test;
int tmp;
int ret = 0;
void *p1, *p2;
for (test = min; test >= 0 && test <= max; test++) {
int llen = 0; // line length
/* avoid leaving empty lines below, this will insert holes into
* test numbers.
*/
switch (test + __LINE__ + 1) {
CASE_TEST(getenv_TERM); EXPECT_STRNZ(1, getenv("TERM")); break;
CASE_TEST(getenv_blah); EXPECT_STRZR(1, getenv("blah")); break;
CASE_TEST(setcmp_blah_blah); EXPECT_EQ(1, strcmp("blah", "blah"), 0); break;
CASE_TEST(setcmp_blah_blah2); EXPECT_NE(1, strcmp("blah", "blah2"), 0); break;
CASE_TEST(setncmp_blah_blah); EXPECT_EQ(1, strncmp("blah", "blah", 10), 0); break;
CASE_TEST(setncmp_blah_blah4); EXPECT_EQ(1, strncmp("blah", "blah4", 4), 0); break;
CASE_TEST(setncmp_blah_blah5); EXPECT_NE(1, strncmp("blah", "blah5", 5), 0); break;
CASE_TEST(setncmp_blah_blah6); EXPECT_NE(1, strncmp("blah", "blah6", 6), 0); break;
CASE_TEST(strchr_foobar_o); EXPECT_STREQ(1, strchr("foobar", 'o'), "oobar"); break;
CASE_TEST(strchr_foobar_z); EXPECT_STRZR(1, strchr("foobar", 'z')); break;
CASE_TEST(strrchr_foobar_o); EXPECT_STREQ(1, strrchr("foobar", 'o'), "obar"); break;
CASE_TEST(strrchr_foobar_z); EXPECT_STRZR(1, strrchr("foobar", 'z')); break;
case __LINE__:
return ret; /* must be last */
/* note: do not set any defaults so as to permit holes above */
}
}
return ret;
}
/* prepare what needs to be prepared for pid 1 (stdio, /dev, /proc, etc) */
int prepare(void)
{
struct stat stat_buf;
/* It's possible that /dev doesn't even exist or was not mounted, so
* we'll try to create it, mount it, or create minimal entries into it.
* We want at least /dev/null and /dev/console.
*/
if (stat("/dev/.", &stat_buf) == 0 || mkdir("/dev", 0755) == 0) {
if (stat("/dev/console", &stat_buf) != 0 ||
stat("/dev/null", &stat_buf) != 0) {
/* try devtmpfs first, otherwise fall back to manual creation */
if (mount("/dev", "/dev", "devtmpfs", 0, 0) != 0) {
mknod("/dev/console", 0600 | S_IFCHR, makedev(5, 1));
mknod("/dev/null", 0666 | S_IFCHR, makedev(1, 3));
}
}
}
/* If no /dev/console was found before calling init, stdio is closed so
* we need to reopen it from /dev/console. If it failed above, it will
* still fail here and we cannot emit a message anyway.
*/
if (close(dup(1)) == -1) {
int fd = open("/dev/console", O_RDWR);
if (fd >= 0) {
if (fd != 0)
dup2(fd, 0);
if (fd != 1)
dup2(fd, 1);
if (fd != 2)
dup2(fd, 2);
if (fd > 2)
close(fd);
puts("\nSuccessfully reopened /dev/console.");
}
}
/* try to mount /proc if not mounted. Silently fail otherwise */
if (stat("/proc/.", &stat_buf) == 0 || mkdir("/proc", 0755) == 0) {
if (stat("/proc/self", &stat_buf) != 0)
mount("/proc", "/proc", "proc", 0, 0);
}
return 0;
}
/* This is the definition of known test names, with their functions */
static struct test test_names[] = {
/* add new tests here */
{ .name = "syscall", .func = run_syscall },
{ .name = "stdlib", .func = run_stdlib },
{ 0 }
};
int is_setting_valid(char *test)
{
int idx, len, test_len, valid = 0;
char delimiter;
if (!test)
return valid;
test_len = strlen(test);
for (idx = 0; test_names[idx].name; idx++) {
len = strlen(test_names[idx].name);
if (test_len < len)
continue;
if (strncmp(test, test_names[idx].name, len) != 0)
continue;
delimiter = test[len];
if (delimiter != ':' && delimiter != ',' && delimiter != '\0')
continue;
valid = 1;
break;
}
return valid;
}
int main(int argc, char **argv, char **envp)
{
int min = 0;
int max = __INT_MAX__;
int ret = 0;
int err;
int idx;
char *test;
environ = envp;
/* when called as init, it's possible that no console was opened, for
* example if no /dev file system was provided. We'll check that fd#1
* was opened, and if not we'll attempt to create and open /dev/console
* and /dev/null that we'll use for later tests.
*/
if (getpid() == 1)
prepare();
/* the definition of a series of tests comes from either argv[1] or the
* "NOLIBC_TEST" environment variable. It's made of a comma-delimited
* series of test names and optional ranges:
* syscall:5-15[:.*],stdlib:8-10
*/
test = argv[1];
if (!is_setting_valid(test))
test = getenv("NOLIBC_TEST");
if (is_setting_valid(test)) {
char *comma, *colon, *dash, *value;
do {
comma = strchr(test, ',');
if (comma)
*(comma++) = '\0';
colon = strchr(test, ':');
if (colon)
*(colon++) = '\0';
for (idx = 0; test_names[idx].name; idx++) {
if (strcmp(test, test_names[idx].name) == 0)
break;
}
if (test_names[idx].name) {
/* The test was named, it will be called at least
* once. We may have an optional range at <colon>
* here, which defaults to the full range.
*/
do {
min = 0; max = __INT_MAX__;
value = colon;
if (value && *value) {
colon = strchr(value, ':');
if (colon)
*(colon++) = '\0';
dash = strchr(value, '-');
if (dash)
*(dash++) = '\0';
/* support :val: :min-max: :min-: :-max: */
if (*value)
min = atoi(value);
if (!dash)
max = min;
else if (*dash)
max = atoi(dash);
value = colon;
}
/* now's time to call the test */
printf("Running test '%s'\n", test_names[idx].name);
err = test_names[idx].func(min, max);
ret += err;
printf("Errors during this test: %d\n\n", err);
} while (colon && *colon);
} else
printf("Ignoring unknown test name '%s'\n", test);
test = comma;
} while (test && *test);
} else {
/* no test mentioned, run everything */
for (idx = 0; test_names[idx].name; idx++) {
printf("Running test '%s'\n", test_names[idx].name);
err = test_names[idx].func(min, max);
ret += err;
printf("Errors during this test: %d\n\n", err);
}
}
printf("Total number of errors: %d\n", ret);
if (getpid() == 1) {
/* we're running as init, there's no other process on the
* system, thus likely started from a VM for a quick check.
* Exiting will provoke a kernel panic that may be reported
* as an error by Qemu or the hypervisor, while stopping
* cleanly will often be reported as a success. This allows
* to use the output of this program for bisecting kernels.
*/
printf("Leaving init with final status: %d\n", !!ret);
if (ret == 0)
reboot(LINUX_REBOOT_CMD_POWER_OFF);
#if defined(__x86_64__)
/* QEMU started with "-device isa-debug-exit -no-reboot" will
* exit with status code 2N+1 when N is written to 0x501. We
* hard-code the syscall here as it's arch-dependent.
*/
#if defined(_NOLIBC_SYS_H)
else if (my_syscall3(__NR_ioperm, 0x501, 1, 1) == 0)
#else
else if (ioperm(0x501, 1, 1) == 0)
#endif
asm volatile ("outb %%al, %%dx" :: "d"(0x501), "a"(0));
/* if it does nothing, fall back to the regular panic */
#endif
}
printf("Exiting with status %d\n", !!ret);
return !!ret;
}