linux_kselftest-nolibc-6.10-rc1
This nolibc update for Linux 6.10-rc1 - adds support for uname(2) - removes open-coded strnlen() - exports strlen() - adds tests for strlcat() and strlcpy() - fixes memory error in realloc() - fixes strlcat() return code and size usage - fixes strlcpy() return code and size usage -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEPZKym/RZuOCGeA/kCwJExA0NQxwFAmZCKZ8ACgkQCwJExA0N QxznfRAA17AXswINyhQEu/2lJIFFpQazZqMyvZ4mv19FPI8P3zhwPN24XsmLNqdo py6dUIbondrs7UgOOG0R0E8N89rxDctok6F8OEScsnfvd+KKEg3+YJscJj2X1vaK H3qU+i/K3oGFHJo2dsaR1iYl+lzo9dyzvicOe5bFzFkVQGI0a3p88CQrhoF3HkNf jc9oqnxIGJn3v3UX6jxFWFiuF17CopNv4/5DZG2QIU5t0JGiqEYxl5ayDwqQsgGB E88eiutsuhkVTqKI/9VXs+YIE0B0xbEQfGGSQ1zzGZKfy7MBSk88PzLXa591DFZH SXETzfxqbI4ACX7L36mUX/JUw/sC5ch67UABZqwrj8oxXb9Ssgxfzmt7rCwBlp2i GdYHuoSDY5TJnskceL5a94BLuvhI9EnYsMHKA2aHM95eBBkPZo7jGqqOU8hJbL4t MbIu0z3iCNUBFcNSBXdfv81Dc4CJO4Orj1jnMqe0U6dSasT+hS2ulZPu6EjKIfMY Wqgfs89pFQ4OH3e3Crx2ngz57iL2fDYZfccfjOJQtYfxTOmXRKHjcDXcZdydsxNF 6dXNDhtuyftvNf3h4o7B73Rv3xNbG1ObZmU2i4wxmY2fsYEsRhqR/UKhtqbTPsxF C/zL8KSraGzrgYuyOzQMDWAH/ybhZytn91kEd1QBWMO79TCC2JI= =2QlZ -----END PGP SIGNATURE----- Merge tag 'linux_kselftest-nolibc-6.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest Pull nolibc updates from Shuah Khan: - add support for uname(2) - remove open-coded strnlen() - export strlen() - add tests for strlcat() and strlcpy() - fix memory error in realloc() - fix strlcat() and strlcpy() return code and size usage * tag 'linux_kselftest-nolibc-6.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest: tools/nolibc: add support for uname(2) tools/nolibc/string: remove open-coded strnlen() selftests/nolibc: Add tests for strlcat() and strlcpy() tools/nolibc: Fix strlcpy() return code and size usage tools/nolibc: Fix strlcat() return code and size usage tools/nolibc/string: export strlen() tools/nolibc/stdlib: fix memory error in realloc()
This commit is contained in:
Linus Torvalds
commit
4b768bf062
@ -185,7 +185,7 @@ void *realloc(void *old_ptr, size_t new_size)
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if (__builtin_expect(!ret, 0))
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return NULL;
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memcpy(ret, heap->user_p, heap->len);
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memcpy(ret, heap->user_p, user_p_len);
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munmap(heap, heap->len);
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return ret;
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}
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@ -123,7 +123,7 @@ char *strcpy(char *dst, const char *src)
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* thus itself, hence the asm() statement below that's meant to disable this
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* confusing practice.
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*/
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static __attribute__((unused))
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__attribute__((weak,unused,section(".text.nolibc_strlen")))
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size_t strlen(const char *str)
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{
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size_t len;
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@ -187,22 +187,26 @@ char *strndup(const char *str, size_t maxlen)
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static __attribute__((unused))
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size_t strlcat(char *dst, const char *src, size_t size)
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{
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size_t len;
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char c;
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size_t len = strnlen(dst, size);
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for (len = 0; dst[len]; len++)
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;
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for (;;) {
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c = *src;
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if (len < size)
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dst[len] = c;
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if (!c)
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/*
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* We want len < size-1. But as size is unsigned and can wrap
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* around, we use len + 1 instead.
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*/
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while (len + 1 < size) {
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dst[len] = *src;
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if (*src == '\0')
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break;
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len++;
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src++;
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}
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if (len < size)
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dst[len] = '\0';
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while (*src++)
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len++;
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return len;
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}
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@ -210,16 +214,18 @@ static __attribute__((unused))
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size_t strlcpy(char *dst, const char *src, size_t size)
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{
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size_t len;
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char c;
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for (len = 0;;) {
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c = src[len];
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if (len < size)
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dst[len] = c;
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if (!c)
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break;
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len++;
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for (len = 0; len < size; len++) {
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dst[len] = src[len];
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if (!dst[len])
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return len;
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}
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if (size)
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dst[size-1] = '\0';
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while (src[len])
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len++;
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return len;
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}
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@ -22,6 +22,7 @@
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#include <linux/stat.h> /* for statx() */
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#include <linux/prctl.h>
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#include <linux/resource.h>
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#include <linux/utsname.h>
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#include "arch.h"
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#include "errno.h"
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@ -1139,6 +1140,32 @@ int umount2(const char *path, int flags)
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}
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/*
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* int uname(struct utsname *buf);
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*/
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struct utsname {
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char sysname[65];
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char nodename[65];
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char release[65];
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char version[65];
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char machine[65];
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char domainname[65];
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};
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static __attribute__((unused))
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int sys_uname(struct utsname *buf)
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{
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return my_syscall1(__NR_uname, buf);
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}
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static __attribute__((unused))
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int uname(struct utsname *buf)
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{
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return __sysret(sys_uname(buf));
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}
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/*
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* int unlink(const char *path);
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*/
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@ -27,6 +27,7 @@
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#include <sys/syscall.h>
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#include <sys/sysmacros.h>
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#include <sys/time.h>
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#include <sys/utsname.h>
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#include <sys/wait.h>
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#include <dirent.h>
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#include <errno.h>
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@ -600,6 +601,25 @@ int expect_strne(const char *expr, int llen, const char *cmp)
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return ret;
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}
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#define EXPECT_STRBUFEQ(cond, expr, buf, val, cmp) \
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do { if (!(cond)) result(llen, SKIPPED); else ret += expect_str_buf_eq(expr, buf, val, llen, cmp); } while (0)
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static __attribute__((unused))
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int expect_str_buf_eq(size_t expr, const char *buf, size_t val, int llen, const char *cmp)
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{
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llen += printf(" = %lu <%s> ", expr, buf);
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if (strcmp(buf, cmp) != 0) {
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result(llen, FAIL);
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return 1;
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}
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if (expr != val) {
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result(llen, FAIL);
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return 1;
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}
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result(llen, OK);
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return 0;
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}
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/* declare tests based on line numbers. There must be exactly one test per line. */
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#define CASE_TEST(name) \
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@ -761,6 +781,45 @@ int test_stat_timestamps(void)
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return 0;
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}
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int test_uname(void)
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{
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struct utsname buf;
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char osrelease[sizeof(buf.release)];
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ssize_t r;
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int fd;
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memset(&buf.domainname, 'P', sizeof(buf.domainname));
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if (uname(&buf))
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return 1;
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if (strncmp("Linux", buf.sysname, sizeof(buf.sysname)))
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return 1;
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fd = open("/proc/sys/kernel/osrelease", O_RDONLY);
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if (fd == -1)
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return 1;
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r = read(fd, osrelease, sizeof(osrelease));
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if (r == -1)
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return 1;
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close(fd);
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if (osrelease[r - 1] == '\n')
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r--;
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/* Validate one of the later fields to ensure field sizes are correct */
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if (strncmp(osrelease, buf.release, r))
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return 1;
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/* Ensure the field domainname is set, it is missing from struct old_utsname */
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if (strnlen(buf.domainname, sizeof(buf.domainname)) == sizeof(buf.domainname))
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return 1;
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return 0;
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}
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int test_mmap_munmap(void)
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{
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int ret, fd, i, page_size;
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@ -966,6 +1025,8 @@ int run_syscall(int min, int max)
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CASE_TEST(stat_fault); EXPECT_SYSER(1, stat(NULL, &stat_buf), -1, EFAULT); break;
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CASE_TEST(stat_timestamps); EXPECT_SYSZR(1, test_stat_timestamps()); break;
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CASE_TEST(symlink_root); EXPECT_SYSER(1, symlink("/", "/"), -1, EEXIST); break;
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CASE_TEST(uname); EXPECT_SYSZR(proc, test_uname()); break;
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CASE_TEST(uname_fault); EXPECT_SYSER(1, uname(NULL), -1, EFAULT); break;
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CASE_TEST(unlink_root); EXPECT_SYSER(1, unlink("/"), -1, EISDIR); break;
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CASE_TEST(unlink_blah); EXPECT_SYSER(1, unlink("/proc/self/blah"), -1, ENOENT); break;
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CASE_TEST(wait_child); EXPECT_SYSER(1, wait(&tmp), -1, ECHILD); break;
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@ -991,6 +1052,14 @@ int run_stdlib(int min, int max)
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for (test = min; test >= 0 && test <= max; test++) {
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int llen = 0; /* line length */
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/* For functions that take a long buffer, like strlcat()
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* Add some more chars after the \0, to test functions that overwrite the buffer set
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* the \0 at the exact right position.
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*/
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char buf[10] = "test123456";
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buf[4] = '\0';
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/* avoid leaving empty lines below, this will insert holes into
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* test numbers.
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*/
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@ -1007,6 +1076,19 @@ int run_stdlib(int min, int max)
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CASE_TEST(strchr_foobar_z); EXPECT_STRZR(1, strchr("foobar", 'z')); break;
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CASE_TEST(strrchr_foobar_o); EXPECT_STREQ(1, strrchr("foobar", 'o'), "obar"); break;
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CASE_TEST(strrchr_foobar_z); EXPECT_STRZR(1, strrchr("foobar", 'z')); break;
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#ifdef NOLIBC
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CASE_TEST(strlcat_0); EXPECT_STRBUFEQ(1, strlcat(buf, "bar", 0), buf, 3, "test"); break;
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CASE_TEST(strlcat_1); EXPECT_STRBUFEQ(1, strlcat(buf, "bar", 1), buf, 4, "test"); break;
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CASE_TEST(strlcat_5); EXPECT_STRBUFEQ(1, strlcat(buf, "bar", 5), buf, 7, "test"); break;
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CASE_TEST(strlcat_6); EXPECT_STRBUFEQ(1, strlcat(buf, "bar", 6), buf, 7, "testb"); break;
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CASE_TEST(strlcat_7); EXPECT_STRBUFEQ(1, strlcat(buf, "bar", 7), buf, 7, "testba"); break;
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CASE_TEST(strlcat_8); EXPECT_STRBUFEQ(1, strlcat(buf, "bar", 8), buf, 7, "testbar"); break;
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CASE_TEST(strlcpy_0); EXPECT_STRBUFEQ(1, strlcpy(buf, "bar", 0), buf, 3, "test"); break;
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CASE_TEST(strlcpy_1); EXPECT_STRBUFEQ(1, strlcpy(buf, "bar", 1), buf, 3, ""); break;
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CASE_TEST(strlcpy_2); EXPECT_STRBUFEQ(1, strlcpy(buf, "bar", 2), buf, 3, "b"); break;
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CASE_TEST(strlcpy_3); EXPECT_STRBUFEQ(1, strlcpy(buf, "bar", 3), buf, 3, "ba"); break;
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CASE_TEST(strlcpy_4); EXPECT_STRBUFEQ(1, strlcpy(buf, "bar", 4), buf, 3, "bar"); break;
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#endif
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CASE_TEST(memcmp_20_20); EXPECT_EQ(1, memcmp("aaa\x20", "aaa\x20", 4), 0); break;
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CASE_TEST(memcmp_20_60); EXPECT_LT(1, memcmp("aaa\x20", "aaa\x60", 4), 0); break;
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CASE_TEST(memcmp_60_20); EXPECT_GT(1, memcmp("aaa\x60", "aaa\x20", 4), 0); break;
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