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-rw-r--r--lib/test_printf.c512
1 files changed, 0 insertions, 512 deletions
diff --git a/lib/test_printf.c b/lib/test_printf.c
deleted file mode 100644
index 563f10e6876a..000000000000
--- a/lib/test_printf.c
+++ /dev/null
@@ -1,512 +0,0 @@
-/*
- * Test cases for printf facility.
- */
-
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/printk.h>
-#include <linux/random.h>
-#include <linux/slab.h>
-#include <linux/string.h>
-
-#include <linux/bitmap.h>
-#include <linux/dcache.h>
-#include <linux/socket.h>
-#include <linux/in.h>
-
-#include <linux/gfp.h>
-#include <linux/mm.h>
-
-#define BUF_SIZE 256
-#define PAD_SIZE 16
-#define FILL_CHAR '$'
-
-#define PTR1 ((void*)0x01234567)
-#define PTR2 ((void*)(long)(int)0xfedcba98)
-
-#if BITS_PER_LONG == 64
-#define PTR1_ZEROES "000000000"
-#define PTR1_SPACES " "
-#define PTR1_STR "1234567"
-#define PTR2_STR "fffffffffedcba98"
-#define PTR_WIDTH 16
-#else
-#define PTR1_ZEROES "0"
-#define PTR1_SPACES " "
-#define PTR1_STR "1234567"
-#define PTR2_STR "fedcba98"
-#define PTR_WIDTH 8
-#endif
-#define PTR_WIDTH_STR stringify(PTR_WIDTH)
-
-static unsigned total_tests __initdata;
-static unsigned failed_tests __initdata;
-static char *test_buffer __initdata;
-static char *alloced_buffer __initdata;
-
-static int __printf(4, 0) __init
-do_test(int bufsize, const char *expect, int elen,
- const char *fmt, va_list ap)
-{
- va_list aq;
- int ret, written;
-
- total_tests++;
-
- memset(alloced_buffer, FILL_CHAR, BUF_SIZE + 2*PAD_SIZE);
- va_copy(aq, ap);
- ret = vsnprintf(test_buffer, bufsize, fmt, aq);
- va_end(aq);
-
- if (ret != elen) {
- pr_warn("vsnprintf(buf, %d, \"%s\", ...) returned %d, expected %d\n",
- bufsize, fmt, ret, elen);
- return 1;
- }
-
- if (memchr_inv(alloced_buffer, FILL_CHAR, PAD_SIZE)) {
- pr_warn("vsnprintf(buf, %d, \"%s\", ...) wrote before buffer\n", bufsize, fmt);
- return 1;
- }
-
- if (!bufsize) {
- if (memchr_inv(test_buffer, FILL_CHAR, BUF_SIZE + PAD_SIZE)) {
- pr_warn("vsnprintf(buf, 0, \"%s\", ...) wrote to buffer\n",
- fmt);
- return 1;
- }
- return 0;
- }
-
- written = min(bufsize-1, elen);
- if (test_buffer[written]) {
- pr_warn("vsnprintf(buf, %d, \"%s\", ...) did not nul-terminate buffer\n",
- bufsize, fmt);
- return 1;
- }
-
- if (memchr_inv(test_buffer + written + 1, FILL_CHAR, BUF_SIZE + PAD_SIZE - (written + 1))) {
- pr_warn("vsnprintf(buf, %d, \"%s\", ...) wrote beyond the nul-terminator\n",
- bufsize, fmt);
- return 1;
- }
-
- if (memcmp(test_buffer, expect, written)) {
- pr_warn("vsnprintf(buf, %d, \"%s\", ...) wrote '%s', expected '%.*s'\n",
- bufsize, fmt, test_buffer, written, expect);
- return 1;
- }
- return 0;
-}
-
-static void __printf(3, 4) __init
-__test(const char *expect, int elen, const char *fmt, ...)
-{
- va_list ap;
- int rand;
- char *p;
-
- if (elen >= BUF_SIZE) {
- pr_err("error in test suite: expected output length %d too long. Format was '%s'.\n",
- elen, fmt);
- failed_tests++;
- return;
- }
-
- va_start(ap, fmt);
-
- /*
- * Every fmt+args is subjected to four tests: Three where we
- * tell vsnprintf varying buffer sizes (plenty, not quite
- * enough and 0), and then we also test that kvasprintf would
- * be able to print it as expected.
- */
- failed_tests += do_test(BUF_SIZE, expect, elen, fmt, ap);
- rand = 1 + prandom_u32_max(elen+1);
- /* Since elen < BUF_SIZE, we have 1 <= rand <= BUF_SIZE. */
- failed_tests += do_test(rand, expect, elen, fmt, ap);
- failed_tests += do_test(0, expect, elen, fmt, ap);
-
- p = kvasprintf(GFP_KERNEL, fmt, ap);
- if (p) {
- total_tests++;
- if (memcmp(p, expect, elen+1)) {
- pr_warn("kvasprintf(..., \"%s\", ...) returned '%s', expected '%s'\n",
- fmt, p, expect);
- failed_tests++;
- }
- kfree(p);
- }
- va_end(ap);
-}
-
-#define test(expect, fmt, ...) \
- __test(expect, strlen(expect), fmt, ##__VA_ARGS__)
-
-static void __init
-test_basic(void)
-{
- /* Work around annoying "warning: zero-length gnu_printf format string". */
- char nul = '\0';
-
- test("", &nul);
- test("100%", "100%%");
- test("xxx%yyy", "xxx%cyyy", '%');
- __test("xxx\0yyy", 7, "xxx%cyyy", '\0');
-}
-
-static void __init
-test_number(void)
-{
- test("0x1234abcd ", "%#-12x", 0x1234abcd);
- test(" 0x1234abcd", "%#12x", 0x1234abcd);
- test("0|001| 12|+123| 1234|-123|-1234", "%d|%03d|%3d|%+d|% d|%+d|% d", 0, 1, 12, 123, 1234, -123, -1234);
- test("0|1|1|128|255", "%hhu|%hhu|%hhu|%hhu|%hhu", 0, 1, 257, 128, -1);
- test("0|1|1|-128|-1", "%hhd|%hhd|%hhd|%hhd|%hhd", 0, 1, 257, 128, -1);
- test("2015122420151225", "%ho%ho%#ho", 1037, 5282, -11627);
- /*
- * POSIX/C99: »The result of converting zero with an explicit
- * precision of zero shall be no characters.« Hence the output
- * from the below test should really be "00|0||| ". However,
- * the kernel's printf also produces a single 0 in that
- * case. This test case simply documents the current
- * behaviour.
- */
- test("00|0|0|0|0", "%.2d|%.1d|%.0d|%.*d|%1.0d", 0, 0, 0, 0, 0, 0);
-#ifndef __CHAR_UNSIGNED__
- {
- /*
- * Passing a 'char' to a %02x specifier doesn't do
- * what was presumably the intention when char is
- * signed and the value is negative. One must either &
- * with 0xff or cast to u8.
- */
- char val = -16;
- test("0xfffffff0|0xf0|0xf0", "%#02x|%#02x|%#02x", val, val & 0xff, (u8)val);
- }
-#endif
-}
-
-static void __init
-test_string(void)
-{
- test("", "%s%.0s", "", "123");
- test("ABCD|abc|123", "%s|%.3s|%.*s", "ABCD", "abcdef", 3, "123456");
- test("1 | 2|3 | 4|5 ", "%-3s|%3s|%-*s|%*s|%*s", "1", "2", 3, "3", 3, "4", -3, "5");
- test("1234 ", "%-10.4s", "123456");
- test(" 1234", "%10.4s", "123456");
- /*
- * POSIX and C99 say that a negative precision (which is only
- * possible to pass via a * argument) should be treated as if
- * the precision wasn't present, and that if the precision is
- * omitted (as in %.s), the precision should be taken to be
- * 0. However, the kernel's printf behave exactly opposite,
- * treating a negative precision as 0 and treating an omitted
- * precision specifier as if no precision was given.
- *
- * These test cases document the current behaviour; should
- * anyone ever feel the need to follow the standards more
- * closely, this can be revisited.
- */
- test(" ", "%4.*s", -5, "123456");
- test("123456", "%.s", "123456");
- test("a||", "%.s|%.0s|%.*s", "a", "b", 0, "c");
- test("a | | ", "%-3.s|%-3.0s|%-3.*s", "a", "b", 0, "c");
-}
-
-static void __init
-plain(void)
-{
- test(PTR1_ZEROES PTR1_STR " " PTR2_STR, "%p %p", PTR1, PTR2);
- /*
- * The field width is overloaded for some %p extensions to
- * pass another piece of information. For plain pointers, the
- * behaviour is slightly odd: One cannot pass either the 0
- * flag nor a precision to %p without gcc complaining, and if
- * one explicitly gives a field width, the number is no longer
- * zero-padded.
- */
- test("|" PTR1_STR PTR1_SPACES " | " PTR1_SPACES PTR1_STR "|",
- "|%-*p|%*p|", PTR_WIDTH+2, PTR1, PTR_WIDTH+2, PTR1);
- test("|" PTR2_STR " | " PTR2_STR "|",
- "|%-*p|%*p|", PTR_WIDTH+2, PTR2, PTR_WIDTH+2, PTR2);
-
- /*
- * Unrecognized %p extensions are treated as plain %p, but the
- * alphanumeric suffix is ignored (that is, does not occur in
- * the output.)
- */
- test("|"PTR1_ZEROES PTR1_STR"|", "|%p0y|", PTR1);
- test("|"PTR2_STR"|", "|%p0y|", PTR2);
-}
-
-static void __init
-symbol_ptr(void)
-{
-}
-
-static void __init
-kernel_ptr(void)
-{
-}
-
-static void __init
-struct_resource(void)
-{
-}
-
-static void __init
-addr(void)
-{
-}
-
-static void __init
-escaped_str(void)
-{
-}
-
-static void __init
-hex_string(void)
-{
- const char buf[3] = {0xc0, 0xff, 0xee};
-
- test("c0 ff ee|c0:ff:ee|c0-ff-ee|c0ffee",
- "%3ph|%3phC|%3phD|%3phN", buf, buf, buf, buf);
- test("c0 ff ee|c0:ff:ee|c0-ff-ee|c0ffee",
- "%*ph|%*phC|%*phD|%*phN", 3, buf, 3, buf, 3, buf, 3, buf);
-}
-
-static void __init
-mac(void)
-{
- const u8 addr[6] = {0x2d, 0x48, 0xd6, 0xfc, 0x7a, 0x05};
-
- test("2d:48:d6:fc:7a:05", "%pM", addr);
- test("05:7a:fc:d6:48:2d", "%pMR", addr);
- test("2d-48-d6-fc-7a-05", "%pMF", addr);
- test("2d48d6fc7a05", "%pm", addr);
- test("057afcd6482d", "%pmR", addr);
-}
-
-static void __init
-ip4(void)
-{
- struct sockaddr_in sa;
-
- sa.sin_family = AF_INET;
- sa.sin_port = cpu_to_be16(12345);
- sa.sin_addr.s_addr = cpu_to_be32(0x7f000001);
-
- test("127.000.000.001|127.0.0.1", "%pi4|%pI4", &sa.sin_addr, &sa.sin_addr);
- test("127.000.000.001|127.0.0.1", "%piS|%pIS", &sa, &sa);
- sa.sin_addr.s_addr = cpu_to_be32(0x01020304);
- test("001.002.003.004:12345|1.2.3.4:12345", "%piSp|%pISp", &sa, &sa);
-}
-
-static void __init
-ip6(void)
-{
-}
-
-static void __init
-ip(void)
-{
- ip4();
- ip6();
-}
-
-static void __init
-uuid(void)
-{
- const char uuid[16] = {0x0, 0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7,
- 0x8, 0x9, 0xa, 0xb, 0xc, 0xd, 0xe, 0xf};
-
- test("00010203-0405-0607-0809-0a0b0c0d0e0f", "%pUb", uuid);
- test("00010203-0405-0607-0809-0A0B0C0D0E0F", "%pUB", uuid);
- test("03020100-0504-0706-0809-0a0b0c0d0e0f", "%pUl", uuid);
- test("03020100-0504-0706-0809-0A0B0C0D0E0F", "%pUL", uuid);
-}
-
-static struct dentry test_dentry[4] __initdata = {
- { .d_parent = &test_dentry[0],
- .d_name = QSTR_INIT(test_dentry[0].d_iname, 3),
- .d_iname = "foo" },
- { .d_parent = &test_dentry[0],
- .d_name = QSTR_INIT(test_dentry[1].d_iname, 5),
- .d_iname = "bravo" },
- { .d_parent = &test_dentry[1],
- .d_name = QSTR_INIT(test_dentry[2].d_iname, 4),
- .d_iname = "alfa" },
- { .d_parent = &test_dentry[2],
- .d_name = QSTR_INIT(test_dentry[3].d_iname, 5),
- .d_iname = "romeo" },
-};
-
-static void __init
-dentry(void)
-{
- test("foo", "%pd", &test_dentry[0]);
- test("foo", "%pd2", &test_dentry[0]);
-
- test("romeo", "%pd", &test_dentry[3]);
- test("alfa/romeo", "%pd2", &test_dentry[3]);
- test("bravo/alfa/romeo", "%pd3", &test_dentry[3]);
- test("/bravo/alfa/romeo", "%pd4", &test_dentry[3]);
- test("/bravo/alfa", "%pd4", &test_dentry[2]);
-
- test("bravo/alfa |bravo/alfa ", "%-12pd2|%*pd2", &test_dentry[2], -12, &test_dentry[2]);
- test(" bravo/alfa| bravo/alfa", "%12pd2|%*pd2", &test_dentry[2], 12, &test_dentry[2]);
-}
-
-static void __init
-struct_va_format(void)
-{
-}
-
-static void __init
-struct_clk(void)
-{
-}
-
-static void __init
-large_bitmap(void)
-{
- const int nbits = 1 << 16;
- unsigned long *bits = kcalloc(BITS_TO_LONGS(nbits), sizeof(long), GFP_KERNEL);
- if (!bits)
- return;
-
- bitmap_set(bits, 1, 20);
- bitmap_set(bits, 60000, 15);
- test("1-20,60000-60014", "%*pbl", nbits, bits);
- kfree(bits);
-}
-
-static void __init
-bitmap(void)
-{
- DECLARE_BITMAP(bits, 20);
- const int primes[] = {2,3,5,7,11,13,17,19};
- int i;
-
- bitmap_zero(bits, 20);
- test("00000|00000", "%20pb|%*pb", bits, 20, bits);
- test("|", "%20pbl|%*pbl", bits, 20, bits);
-
- for (i = 0; i < ARRAY_SIZE(primes); ++i)
- set_bit(primes[i], bits);
- test("a28ac|a28ac", "%20pb|%*pb", bits, 20, bits);
- test("2-3,5,7,11,13,17,19|2-3,5,7,11,13,17,19", "%20pbl|%*pbl", bits, 20, bits);
-
- bitmap_fill(bits, 20);
- test("fffff|fffff", "%20pb|%*pb", bits, 20, bits);
- test("0-19|0-19", "%20pbl|%*pbl", bits, 20, bits);
-
- large_bitmap();
-}
-
-static void __init
-netdev_features(void)
-{
-}
-
-static void __init
-flags(void)
-{
- unsigned long flags;
- gfp_t gfp;
- char *cmp_buffer;
-
- flags = 0;
- test("", "%pGp", &flags);
-
- /* Page flags should filter the zone id */
- flags = 1UL << NR_PAGEFLAGS;
- test("", "%pGp", &flags);
-
- flags |= 1UL << PG_uptodate | 1UL << PG_dirty | 1UL << PG_lru
- | 1UL << PG_active | 1UL << PG_swapbacked;
- test("uptodate|dirty|lru|active|swapbacked", "%pGp", &flags);
-
-
- flags = VM_READ | VM_EXEC | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC
- | VM_DENYWRITE;
- test("read|exec|mayread|maywrite|mayexec|denywrite", "%pGv", &flags);
-
- gfp = GFP_TRANSHUGE;
- test("GFP_TRANSHUGE", "%pGg", &gfp);
-
- gfp = GFP_ATOMIC|__GFP_DMA;
- test("GFP_ATOMIC|GFP_DMA", "%pGg", &gfp);
-
- gfp = __GFP_ATOMIC;
- test("__GFP_ATOMIC", "%pGg", &gfp);
-
- cmp_buffer = kmalloc(BUF_SIZE, GFP_KERNEL);
- if (!cmp_buffer)
- return;
-
- /* Any flags not translated by the table should remain numeric */
- gfp = ~__GFP_BITS_MASK;
- snprintf(cmp_buffer, BUF_SIZE, "%#lx", (unsigned long) gfp);
- test(cmp_buffer, "%pGg", &gfp);
-
- snprintf(cmp_buffer, BUF_SIZE, "__GFP_ATOMIC|%#lx",
- (unsigned long) gfp);
- gfp |= __GFP_ATOMIC;
- test(cmp_buffer, "%pGg", &gfp);
-
- kfree(cmp_buffer);
-}
-
-static void __init
-test_pointer(void)
-{
- plain();
- symbol_ptr();
- kernel_ptr();
- struct_resource();
- addr();
- escaped_str();
- hex_string();
- mac();
- ip();
- uuid();
- dentry();
- struct_va_format();
- struct_clk();
- bitmap();
- netdev_features();
- flags();
-}
-
-static int __init
-test_printf_init(void)
-{
- alloced_buffer = kmalloc(BUF_SIZE + 2*PAD_SIZE, GFP_KERNEL);
- if (!alloced_buffer)
- return -ENOMEM;
- test_buffer = alloced_buffer + PAD_SIZE;
-
- test_basic();
- test_number();
- test_string();
- test_pointer();
-
- kfree(alloced_buffer);
-
- if (failed_tests == 0)
- pr_info("all %u tests passed\n", total_tests);
- else
- pr_warn("failed %u out of %u tests\n", failed_tests, total_tests);
-
- return failed_tests ? -EINVAL : 0;
-}
-
-module_init(test_printf_init);
-
-MODULE_AUTHOR("Rasmus Villemoes <linux@rasmusvillemoes.dk>");
-MODULE_LICENSE("GPL");
generated by cgit (git 2.34.1) at 2025-12-22 09:04:46 +0000