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tools/nolibc: add testcases for vfprintf

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vfprintf() is complex and so far did not have proper tests.

Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Signed-off-by: Willy Tarreau <w@1wt.eu>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
This commit is contained in:
Thomas Weißschuh 2023-04-02 20:48:06 +02:00 committed by Paul E. McKenney
parent 5df28c153d
commit 69f2cd9fea
1 changed files with 86 additions and 0 deletions
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86
tools/testing/selftests/nolibc/nolibc-test.c
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@ -20,6 +20,7 @@
#include <linux/reboot.h>
#include <sys/io.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <sys/mount.h>
#include <sys/reboot.h>
#include <sys/stat.h>
@ -669,6 +670,90 @@ int run_stdlib(int min, int max)
return ret;
}
#define EXPECT_VFPRINTF(c, expected, fmt, ...) \
ret += expect_vfprintf(llen, c, expected, fmt, ##__VA_ARGS__)
static int expect_vfprintf(int llen, size_t c, const char *expected, const char *fmt, ...)
{
int ret, fd, w, r;
char buf[100];
FILE *memfile;
va_list args;
fd = memfd_create("vfprintf", 0);
if (fd == -1) {
pad_spc(llen, 64, "[FAIL]\n");
return 1;
}
memfile = fdopen(fd, "w+");
if (!memfile) {
pad_spc(llen, 64, "[FAIL]\n");
return 1;
}
va_start(args, fmt);
w = vfprintf(memfile, fmt, args);
va_end(args);
if (w != c) {
llen += printf(" written(%d) != %d", w, (int) c);
pad_spc(llen, 64, "[FAIL]\n");
return 1;
}
fflush(memfile);
lseek(fd, 0, SEEK_SET);
r = read(fd, buf, sizeof(buf) - 1);
buf[r] = '\0';
fclose(memfile);
if (r != w) {
llen += printf(" written(%d) != read(%d)", w, r);
pad_spc(llen, 64, "[FAIL]\n");
return 1;
}
llen += printf(" \"%s\" = \"%s\"", expected, buf);
ret = strncmp(expected, buf, c);
pad_spc(llen, 64, ret ? "[FAIL]\n" : " [OK]\n");
return ret;
}
static int run_vfprintf(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(empty); EXPECT_VFPRINTF(0, "", ""); break;
CASE_TEST(simple); EXPECT_VFPRINTF(3, "foo", "foo"); break;
CASE_TEST(string); EXPECT_VFPRINTF(3, "foo", "%s", "foo"); break;
CASE_TEST(number); EXPECT_VFPRINTF(4, "1234", "%d", 1234); break;
CASE_TEST(negnumber); EXPECT_VFPRINTF(5, "-1234", "%d", -1234); break;
CASE_TEST(unsigned); EXPECT_VFPRINTF(5, "12345", "%u", 12345); break;
CASE_TEST(char); EXPECT_VFPRINTF(1, "c", "%c", 'c'); break;
CASE_TEST(hex); EXPECT_VFPRINTF(1, "f", "%x", 0xf); break;
CASE_TEST(pointer); EXPECT_VFPRINTF(3, "0x1", "%p", (void *) 0x1); break;
case __LINE__:
return ret; /* must be last */
/* note: do not set any defaults so as to permit holes above */
}
}
return ret;
}
static int smash_stack(void)
{
char buf[100];
@ -777,6 +862,7 @@ static const struct test test_names[] = {
/* add new tests here */
{ .name = "syscall", .func = run_syscall },
{ .name = "stdlib", .func = run_stdlib },
{ .name = "vfprintf", .func = run_vfprintf },
{ .name = "protection", .func = run_protection },
{ 0 }
};