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-rw-r--r--lib/tests/printf_kunit.c803
1 files changed, 803 insertions, 0 deletions
diff --git a/lib/tests/printf_kunit.c b/lib/tests/printf_kunit.c
new file mode 100644
index 000000000000..2c9f6170bacd
--- /dev/null
+++ b/lib/tests/printf_kunit.c
@@ -0,0 +1,803 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Test cases for printf facility.
+ */
+
+#include <kunit/test.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/printk.h>
+#include <linux/random.h>
+#include <linux/rtc.h>
+#include <linux/slab.h>
+#include <linux/sprintf.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>
+
+#include <linux/property.h>
+
+#define BUF_SIZE 256
+#define PAD_SIZE 16
+#define FILL_CHAR '$'
+
+#define NOWARN(option, comment, block) \
+ __diag_push(); \
+ __diag_ignore_all(#option, comment); \
+ block \
+ __diag_pop();
+
+static unsigned int total_tests;
+
+static char *test_buffer;
+static char *alloced_buffer;
+
+static void __printf(7, 0)
+do_test(struct kunit *kunittest, const char *file, const int line, 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) {
+ KUNIT_FAIL(kunittest,
+ "%s:%d: vsnprintf(buf, %d, \"%s\", ...) returned %d, expected %d\n",
+ file, line, bufsize, fmt, ret, elen);
+ return;
+ }
+
+ if (memchr_inv(alloced_buffer, FILL_CHAR, PAD_SIZE)) {
+ KUNIT_FAIL(kunittest,
+ "%s:%d: vsnprintf(buf, %d, \"%s\", ...) wrote before buffer\n",
+ file, line, bufsize, fmt);
+ return;
+ }
+
+ if (!bufsize) {
+ if (memchr_inv(test_buffer, FILL_CHAR, BUF_SIZE + PAD_SIZE)) {
+ KUNIT_FAIL(kunittest,
+ "%s:%d: vsnprintf(buf, 0, \"%s\", ...) wrote to buffer\n",
+ file, line, fmt);
+ }
+ return;
+ }
+
+ written = min(bufsize-1, elen);
+ if (test_buffer[written]) {
+ KUNIT_FAIL(kunittest,
+ "%s:%d: vsnprintf(buf, %d, \"%s\", ...) did not nul-terminate buffer\n",
+ file, line, bufsize, fmt);
+ return;
+ }
+
+ if (memchr_inv(test_buffer + written + 1, FILL_CHAR, bufsize - (written + 1))) {
+ KUNIT_FAIL(kunittest,
+ "%s:%d: vsnprintf(buf, %d, \"%s\", ...) wrote beyond the nul-terminator\n",
+ file, line, bufsize, fmt);
+ return;
+ }
+
+ if (memchr_inv(test_buffer + bufsize, FILL_CHAR, BUF_SIZE + PAD_SIZE - bufsize)) {
+ KUNIT_FAIL(kunittest,
+ "%s:%d: vsnprintf(buf, %d, \"%s\", ...) wrote beyond buffer\n",
+ file, line, bufsize, fmt);
+ return;
+ }
+
+ if (memcmp(test_buffer, expect, written)) {
+ KUNIT_FAIL(kunittest,
+ "%s:%d: vsnprintf(buf, %d, \"%s\", ...) wrote '%s', expected '%.*s'\n",
+ file, line, bufsize, fmt, test_buffer, written, expect);
+ return;
+ }
+}
+
+static void __printf(6, 7)
+__test(struct kunit *kunittest, const char *file, const int line, const char *expect, int elen,
+ const char *fmt, ...)
+{
+ va_list ap;
+ int rand;
+ char *p;
+
+ if (elen >= BUF_SIZE) {
+ KUNIT_FAIL(kunittest,
+ "%s:%d: error in test suite: expected length (%d) >= BUF_SIZE (%d). fmt=\"%s\"\n",
+ file, line, elen, BUF_SIZE, fmt);
+ 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.
+ */
+ do_test(kunittest, file, line, BUF_SIZE, expect, elen, fmt, ap);
+ rand = get_random_u32_inclusive(1, elen + 1);
+ /* Since elen < BUF_SIZE, we have 1 <= rand <= BUF_SIZE. */
+ do_test(kunittest, file, line, rand, expect, elen, fmt, ap);
+ do_test(kunittest, file, line, 0, expect, elen, fmt, ap);
+
+ p = kvasprintf(GFP_KERNEL, fmt, ap);
+ if (p) {
+ total_tests++;
+ if (memcmp(p, expect, elen+1)) {
+ KUNIT_FAIL(kunittest,
+ "%s:%d: kvasprintf(..., \"%s\", ...) returned '%s', expected '%s'\n",
+ file, line, fmt, p, expect);
+ }
+ kfree(p);
+ }
+ va_end(ap);
+}
+
+#define test(expect, fmt, ...) \
+ __test(kunittest, __FILE__, __LINE__, expect, strlen(expect), fmt, ##__VA_ARGS__)
+
+static void
+test_basic(struct kunit *kunittest)
+{
+ /* Work around annoying "warning: zero-length gnu_printf format string". */
+ char nul = '\0';
+
+ test("", &nul);
+ test("100%", "100%%");
+ test("xxx%yyy", "xxx%cyyy", '%');
+ __test(kunittest, __FILE__, __LINE__, "xxx\0yyy", 7, "xxx%cyyy", '\0');
+}
+
+static void
+test_number(struct kunit *kunittest)
+{
+ 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);
+ NOWARN(-Wformat, "Intentionally test narrowing conversion specifiers.", {
+ 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);
+}
+
+static void
+test_string(struct kunit *kunittest)
+{
+ 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");
+}
+
+#define PLAIN_BUF_SIZE 64 /* leave some space so we don't oops */
+
+#if BITS_PER_LONG == 64
+
+#define PTR_WIDTH 16
+#define PTR ((void *)0xffff0123456789abUL)
+#define PTR_STR "ffff0123456789ab"
+#define PTR_VAL_NO_CRNG "(____ptrval____)"
+#define ZEROS "00000000" /* hex 32 zero bits */
+#define ONES "ffffffff" /* hex 32 one bits */
+
+#else
+
+#define PTR_WIDTH 8
+#define PTR ((void *)0x456789ab)
+#define PTR_STR "456789ab"
+#define PTR_VAL_NO_CRNG "(ptrval)"
+#define ZEROS ""
+#define ONES ""
+
+#endif /* BITS_PER_LONG == 64 */
+
+static void
+plain_hash_to_buffer(struct kunit *kunittest, const void *p, char *buf, size_t len)
+{
+ KUNIT_ASSERT_EQ(kunittest, snprintf(buf, len, "%p", p), PTR_WIDTH);
+
+ if (strncmp(buf, PTR_VAL_NO_CRNG, PTR_WIDTH) == 0) {
+ kunit_skip(kunittest,
+ "crng possibly not yet initialized. plain 'p' buffer contains \"%s\"\n",
+ PTR_VAL_NO_CRNG);
+ }
+}
+
+static void
+hash_pointer(struct kunit *kunittest)
+{
+ if (no_hash_pointers)
+ kunit_skip(kunittest, "hash pointers disabled");
+
+ char buf[PLAIN_BUF_SIZE];
+
+ plain_hash_to_buffer(kunittest, PTR, buf, PLAIN_BUF_SIZE);
+
+ /*
+ * The hash of %p is unpredictable, therefore test() cannot be used.
+ *
+ * Instead verify that the first 32 bits are zeros on a 64-bit system
+ * and that the non-hashed value is not printed.
+ */
+
+ KUNIT_EXPECT_MEMEQ(kunittest, buf, ZEROS, strlen(ZEROS));
+ KUNIT_EXPECT_MEMNEQ(kunittest, buf, PTR_STR, PTR_WIDTH);
+}
+
+static void
+test_hashed(struct kunit *kunittest, const char *fmt, const void *p)
+{
+ char buf[PLAIN_BUF_SIZE];
+
+ plain_hash_to_buffer(kunittest, p, buf, PLAIN_BUF_SIZE);
+
+ test(buf, fmt, p);
+}
+
+/*
+ * NULL pointers aren't hashed.
+ */
+static void
+null_pointer(struct kunit *kunittest)
+{
+ test(ZEROS "00000000", "%p", NULL);
+ test(ZEROS "00000000", "%px", NULL);
+ test("(null)", "%pE", NULL);
+}
+
+/*
+ * Error pointers aren't hashed.
+ */
+static void
+error_pointer(struct kunit *kunittest)
+{
+ test(ONES "fffffff5", "%p", ERR_PTR(-11));
+ test(ONES "fffffff5", "%px", ERR_PTR(-11));
+ test("(efault)", "%pE", ERR_PTR(-11));
+}
+
+#define PTR_INVALID ((void *)0x000000ab)
+
+static void
+invalid_pointer(struct kunit *kunittest)
+{
+ test_hashed(kunittest, "%p", PTR_INVALID);
+ test(ZEROS "000000ab", "%px", PTR_INVALID);
+ test("(efault)", "%pE", PTR_INVALID);
+}
+
+static void
+symbol_ptr(struct kunit *kunittest)
+{
+}
+
+static void
+kernel_ptr(struct kunit *kunittest)
+{
+ /* We can't test this without access to kptr_restrict. */
+}
+
+static void
+struct_resource(struct kunit *kunittest)
+{
+ struct resource test_resource = {
+ .start = 0xc0ffee00,
+ .end = 0xc0ffee00,
+ .flags = IORESOURCE_MEM,
+ };
+
+ test("[mem 0xc0ffee00 flags 0x200]",
+ "%pr", &test_resource);
+
+ test_resource = (struct resource) {
+ .start = 0xc0ffee,
+ .end = 0xba5eba11,
+ .flags = IORESOURCE_MEM,
+ };
+ test("[mem 0x00c0ffee-0xba5eba11 flags 0x200]",
+ "%pr", &test_resource);
+
+ test_resource = (struct resource) {
+ .start = 0xba5eba11,
+ .end = 0xc0ffee,
+ .flags = IORESOURCE_MEM,
+ };
+ test("[mem 0xba5eba11-0x00c0ffee flags 0x200]",
+ "%pr", &test_resource);
+
+ test_resource = (struct resource) {
+ .start = 0xba5eba11,
+ .end = 0xba5eca11,
+ .flags = IORESOURCE_MEM,
+ };
+
+ test("[mem 0xba5eba11-0xba5eca11 flags 0x200]",
+ "%pr", &test_resource);
+
+ test_resource = (struct resource) {
+ .start = 0xba11,
+ .end = 0xca10,
+ .flags = IORESOURCE_IO |
+ IORESOURCE_DISABLED |
+ IORESOURCE_UNSET,
+ };
+
+ test("[io size 0x1000 disabled]",
+ "%pR", &test_resource);
+}
+
+static void
+struct_range(struct kunit *kunittest)
+{
+ struct range test_range = DEFINE_RANGE(0xc0ffee00ba5eba11,
+ 0xc0ffee00ba5eba11);
+ test("[range 0xc0ffee00ba5eba11]", "%pra", &test_range);
+
+ test_range = DEFINE_RANGE(0xc0ffee, 0xba5eba11);
+ test("[range 0x0000000000c0ffee-0x00000000ba5eba11]",
+ "%pra", &test_range);
+
+ test_range = DEFINE_RANGE(0xba5eba11, 0xc0ffee);
+ test("[range 0x00000000ba5eba11-0x0000000000c0ffee]",
+ "%pra", &test_range);
+}
+
+static void
+addr(struct kunit *kunittest)
+{
+}
+
+static void
+escaped_str(struct kunit *kunittest)
+{
+}
+
+static void
+hex_string(struct kunit *kunittest)
+{
+ 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
+mac(struct kunit *kunittest)
+{
+ 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
+ip4(struct kunit *kunittest)
+{
+ 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
+ip6(struct kunit *kunittest)
+{
+}
+
+static void
+uuid(struct kunit *kunittest)
+{
+ 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] = {
+ { .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
+dentry(struct kunit *kunittest)
+{
+ test("foo", "%pd", &test_dentry[0]);
+ test("foo", "%pd2", &test_dentry[0]);
+
+ test("(null)", "%pd", NULL);
+ test("(efault)", "%pd", PTR_INVALID);
+ test("(null)", "%pD", NULL);
+ test("(efault)", "%pD", PTR_INVALID);
+
+ 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
+struct_va_format(struct kunit *kunittest)
+{
+}
+
+static void
+time_and_date(struct kunit *kunittest)
+{
+ /* 1543210543 */
+ const struct rtc_time tm = {
+ .tm_sec = 43,
+ .tm_min = 35,
+ .tm_hour = 5,
+ .tm_mday = 26,
+ .tm_mon = 10,
+ .tm_year = 118,
+ };
+ /* 2019-01-04T15:32:23 */
+ time64_t t = 1546615943;
+
+ test("(%pt?)", "%pt", &tm);
+ test("2018-11-26T05:35:43", "%ptR", &tm);
+ test("0118-10-26T05:35:43", "%ptRr", &tm);
+ test("05:35:43|2018-11-26", "%ptRt|%ptRd", &tm, &tm);
+ test("05:35:43|0118-10-26", "%ptRtr|%ptRdr", &tm, &tm);
+ test("05:35:43|2018-11-26", "%ptRttr|%ptRdtr", &tm, &tm);
+ test("05:35:43 tr|2018-11-26 tr", "%ptRt tr|%ptRd tr", &tm, &tm);
+
+ test("2019-01-04T15:32:23", "%ptT", &t);
+ test("0119-00-04T15:32:23", "%ptTr", &t);
+ test("15:32:23|2019-01-04", "%ptTt|%ptTd", &t, &t);
+ test("15:32:23|0119-00-04", "%ptTtr|%ptTdr", &t, &t);
+
+ test("2019-01-04 15:32:23", "%ptTs", &t);
+ test("0119-00-04 15:32:23", "%ptTsr", &t);
+ test("15:32:23|2019-01-04", "%ptTts|%ptTds", &t, &t);
+ test("15:32:23|0119-00-04", "%ptTtrs|%ptTdrs", &t, &t);
+}
+
+static void
+struct_clk(struct kunit *kunittest)
+{
+}
+
+static void
+large_bitmap(struct kunit *kunittest)
+{
+ const int nbits = 1 << 16;
+ unsigned long *bits = bitmap_zalloc(nbits, GFP_KERNEL);
+ if (!bits)
+ return;
+
+ bitmap_set(bits, 1, 20);
+ bitmap_set(bits, 60000, 15);
+ test("1-20,60000-60014", "%*pbl", nbits, bits);
+ bitmap_free(bits);
+}
+
+static void
+bitmap(struct kunit *kunittest)
+{
+ 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(kunittest);
+}
+
+static void
+netdev_features(struct kunit *kunittest)
+{
+}
+
+struct page_flags_test {
+ int width;
+ int shift;
+ int mask;
+ const char *fmt;
+ const char *name;
+};
+
+static const struct page_flags_test pft[] = {
+ {SECTIONS_WIDTH, SECTIONS_PGSHIFT, SECTIONS_MASK,
+ "%d", "section"},
+ {NODES_WIDTH, NODES_PGSHIFT, NODES_MASK,
+ "%d", "node"},
+ {ZONES_WIDTH, ZONES_PGSHIFT, ZONES_MASK,
+ "%d", "zone"},
+ {LAST_CPUPID_WIDTH, LAST_CPUPID_PGSHIFT, LAST_CPUPID_MASK,
+ "%#x", "lastcpupid"},
+ {KASAN_TAG_WIDTH, KASAN_TAG_PGSHIFT, KASAN_TAG_MASK,
+ "%#x", "kasantag"},
+};
+
+static void
+page_flags_test(struct kunit *kunittest, int section, int node, int zone,
+ int last_cpupid, int kasan_tag, unsigned long flags, const char *name,
+ char *cmp_buf)
+{
+ unsigned long values[] = {section, node, zone, last_cpupid, kasan_tag};
+ unsigned long size;
+ bool append = false;
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(values); i++)
+ flags |= (values[i] & pft[i].mask) << pft[i].shift;
+
+ size = scnprintf(cmp_buf, BUF_SIZE, "%#lx(", flags);
+ if (flags & PAGEFLAGS_MASK) {
+ size += scnprintf(cmp_buf + size, BUF_SIZE - size, "%s", name);
+ append = true;
+ }
+
+ for (i = 0; i < ARRAY_SIZE(pft); i++) {
+ if (!pft[i].width)
+ continue;
+
+ if (append)
+ size += scnprintf(cmp_buf + size, BUF_SIZE - size, "|");
+
+ size += scnprintf(cmp_buf + size, BUF_SIZE - size, "%s=",
+ pft[i].name);
+ size += scnprintf(cmp_buf + size, BUF_SIZE - size, pft[i].fmt,
+ values[i] & pft[i].mask);
+ append = true;
+ }
+
+ snprintf(cmp_buf + size, BUF_SIZE - size, ")");
+
+ test(cmp_buf, "%pGp", &flags);
+}
+
+static void
+flags(struct kunit *kunittest)
+{
+ unsigned long flags;
+ char *cmp_buffer;
+ gfp_t gfp;
+
+ cmp_buffer = kunit_kmalloc(kunittest, BUF_SIZE, GFP_KERNEL);
+ KUNIT_ASSERT_NOT_NULL(kunittest, cmp_buffer);
+
+ flags = 0;
+ page_flags_test(kunittest, 0, 0, 0, 0, 0, flags, "", cmp_buffer);
+
+ flags = 1UL << NR_PAGEFLAGS;
+ page_flags_test(kunittest, 0, 0, 0, 0, 0, flags, "", cmp_buffer);
+
+ flags |= 1UL << PG_uptodate | 1UL << PG_dirty | 1UL << PG_lru
+ | 1UL << PG_active | 1UL << PG_swapbacked;
+ page_flags_test(kunittest, 1, 1, 1, 0x1fffff, 1, flags,
+ "uptodate|dirty|lru|active|swapbacked",
+ cmp_buffer);
+
+ flags = VM_READ | VM_EXEC | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC;
+ test("read|exec|mayread|maywrite|mayexec", "%pGv", &flags);
+
+ gfp = GFP_TRANSHUGE;
+ test("GFP_TRANSHUGE", "%pGg", &gfp);
+
+ gfp = GFP_ATOMIC|__GFP_DMA;
+ test("GFP_ATOMIC|GFP_DMA", "%pGg", &gfp);
+
+ gfp = __GFP_HIGH;
+ test("__GFP_HIGH", "%pGg", &gfp);
+
+ /* 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_HIGH|%#lx",
+ (unsigned long) gfp);
+ gfp |= __GFP_HIGH;
+ test(cmp_buffer, "%pGg", &gfp);
+}
+
+static void fwnode_pointer(struct kunit *kunittest)
+{
+ const struct software_node first = { .name = "first" };
+ const struct software_node second = { .name = "second", .parent = &first };
+ const struct software_node third = { .name = "third", .parent = &second };
+ const struct software_node *group[] = { &first, &second, &third, NULL };
+ const char * const full_name_second = "first/second";
+ const char * const full_name_third = "first/second/third";
+ const char * const second_name = "second";
+ const char * const third_name = "third";
+ int rval;
+
+ rval = software_node_register_node_group(group);
+ if (rval) {
+ kunit_skip(kunittest, "cannot register softnodes; rval %d\n", rval);
+ }
+
+ test(full_name_second, "%pfw", software_node_fwnode(&second));
+ test(full_name_third, "%pfw", software_node_fwnode(&third));
+ test(full_name_third, "%pfwf", software_node_fwnode(&third));
+ test(second_name, "%pfwP", software_node_fwnode(&second));
+ test(third_name, "%pfwP", software_node_fwnode(&third));
+
+ software_node_unregister_node_group(group);
+}
+
+static void fourcc_pointer(struct kunit *kunittest)
+{
+ struct {
+ u32 code;
+ char *str;
+ } const try[] = {
+ { 0x3231564e, "NV12 little-endian (0x3231564e)", },
+ { 0xb231564e, "NV12 big-endian (0xb231564e)", },
+ { 0x10111213, ".... little-endian (0x10111213)", },
+ { 0x20303159, "Y10 little-endian (0x20303159)", },
+ };
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(try); i++)
+ test(try[i].str, "%p4cc", &try[i].code);
+}
+
+static void
+errptr(struct kunit *kunittest)
+{
+ test("-1234", "%pe", ERR_PTR(-1234));
+
+ /* Check that %pe with a non-ERR_PTR gets treated as ordinary %p. */
+ BUILD_BUG_ON(IS_ERR(PTR));
+ test_hashed(kunittest, "%pe", PTR);
+
+#ifdef CONFIG_SYMBOLIC_ERRNAME
+ test("(-ENOTSOCK)", "(%pe)", ERR_PTR(-ENOTSOCK));
+ test("(-EAGAIN)", "(%pe)", ERR_PTR(-EAGAIN));
+ BUILD_BUG_ON(EAGAIN != EWOULDBLOCK);
+ test("(-EAGAIN)", "(%pe)", ERR_PTR(-EWOULDBLOCK));
+ test("[-EIO ]", "[%-8pe]", ERR_PTR(-EIO));
+ test("[ -EIO]", "[%8pe]", ERR_PTR(-EIO));
+ test("-EPROBE_DEFER", "%pe", ERR_PTR(-EPROBE_DEFER));
+#endif
+}
+
+static int printf_suite_init(struct kunit_suite *suite)
+{
+ total_tests = 0;
+
+ alloced_buffer = kmalloc(BUF_SIZE + 2*PAD_SIZE, GFP_KERNEL);
+ if (!alloced_buffer)
+ return -ENOMEM;
+ test_buffer = alloced_buffer + PAD_SIZE;
+
+ return 0;
+}
+
+static void printf_suite_exit(struct kunit_suite *suite)
+{
+ kfree(alloced_buffer);
+
+ kunit_info(suite, "ran %u tests\n", total_tests);
+}
+
+static struct kunit_case printf_test_cases[] = {
+ KUNIT_CASE(test_basic),
+ KUNIT_CASE(test_number),
+ KUNIT_CASE(test_string),
+ KUNIT_CASE(hash_pointer),
+ KUNIT_CASE(null_pointer),
+ KUNIT_CASE(error_pointer),
+ KUNIT_CASE(invalid_pointer),
+ KUNIT_CASE(symbol_ptr),
+ KUNIT_CASE(kernel_ptr),
+ KUNIT_CASE(struct_resource),
+ KUNIT_CASE(struct_range),
+ KUNIT_CASE(addr),
+ KUNIT_CASE(escaped_str),
+ KUNIT_CASE(hex_string),
+ KUNIT_CASE(mac),
+ KUNIT_CASE(ip4),
+ KUNIT_CASE(ip6),
+ KUNIT_CASE(uuid),
+ KUNIT_CASE(dentry),
+ KUNIT_CASE(struct_va_format),
+ KUNIT_CASE(time_and_date),
+ KUNIT_CASE(struct_clk),
+ KUNIT_CASE(bitmap),
+ KUNIT_CASE(netdev_features),
+ KUNIT_CASE(flags),
+ KUNIT_CASE(errptr),
+ KUNIT_CASE(fwnode_pointer),
+ KUNIT_CASE(fourcc_pointer),
+ {}
+};
+
+static struct kunit_suite printf_test_suite = {
+ .name = "printf",
+ .suite_init = printf_suite_init,
+ .suite_exit = printf_suite_exit,
+ .test_cases = printf_test_cases,
+};
+
+kunit_test_suite(printf_test_suite);
+
+MODULE_AUTHOR("Rasmus Villemoes <linux@rasmusvillemoes.dk>");
+MODULE_DESCRIPTION("Test cases for printf facility");
+MODULE_LICENSE("GPL");
generated by cgit v1.2.3 (git 2.46.0) at 2025-10-31 09:00:45 +0000