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Make more functions friendly to Address Sanitizer

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This commit is contained in:
Justine Tunney 2021-02-02 03:45:31 -08:00
parent 3ab76b2312
commit cbfd4ccd1e
70 changed files with 1267 additions and 291 deletions
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99
test/libc/str/strchr_test.c
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@ -17,7 +17,10 @@
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/bits/bits.h"
#include "libc/mem/mem.h"
#include "libc/rand/rand.h"
#include "libc/str/str.h"
#include "libc/testlib/ezbench.h"
#include "libc/testlib/testlib.h"
TEST(strchr, blank) {
@ -66,3 +69,99 @@ TEST(strchrnul, notFound_returnsPointerToNulByte) {
EXPECT_STREQ("", strchrnul(buf, 'z'));
EXPECT_EQ(&buf[2], strchrnul(buf, 'z'));
}
char *strchr$pure(const char *s, int c) {
char *r;
for (c &= 0xff;; ++s) {
if ((*s & 0xff) == c) return (char *)s;
if (!*s) return NULL;
}
}
TEST(strchr, fuzz) {
char *p;
int i, j;
p = calloc(1, 64);
for (i = -2; i < 257; ++i) {
for (j = 0; j < 17; ++j) {
rngset(p, 63, rand64, -1);
ASSERT_EQ(strchr(p + j, i), strchr$pure(p + j, i));
}
}
free(p);
}
BENCH(strchr, bench) {
EZBENCH2("strchr 0", donothing, EXPROPRIATE(strchr(VEIL("r", ""), 0)));
EZBENCH2("strchr 5", donothing, EXPROPRIATE(strchr(VEIL("r", "hello"), 'o')));
EZBENCH2("strchr 8", donothing,
EXPROPRIATE(strchr(VEIL("r", "hellzzzo"), 'o')));
EZBENCH2("strchr 17", donothing,
EXPROPRIATE(strchr(VEIL("r", "hellzzzhellzzzeeo"), 'o')));
EZBENCH2("strchr 34", donothing,
EXPROPRIATE(
strchr(VEIL("r", "hellzzzhellzzzeeAhellzzzhellzzzeeo"), 'o')));
}
char *memchr$pure(const char *m, int c, size_t n) {
const unsigned char *p, *pe;
for (c &= 0xff, p = (const unsigned char *)m, pe = p + n; p < pe; ++p) {
if (*p == c) return p;
}
return NULL;
}
TEST(memchr, fuzz) {
char *p;
int i, j;
p = malloc(64);
for (i = -2; i < 257; ++i) {
for (j = 0; j < 17; ++j) {
rngset(p, 64, rand64, -1);
ASSERT_EQ(memchr(p + j, i, 64 - j), memchr$pure(p + j, i, 64 - j));
}
}
free(p);
}
char *strchrnul$pure(const char *s, int c) {
char *r;
for (c &= 0xff;; ++s) {
if ((*s & 0xff) == c) return (char *)s;
if (!*s) return s;
}
}
TEST(strchrnul, fuzz) {
char *p;
int i, j;
p = calloc(1, 64);
for (i = -2; i < 257; ++i) {
for (j = 0; j < 17; ++j) {
rngset(p, 63, rand64, -1);
ASSERT_EQ(strchrnul(p + j, i), strchrnul$pure(p + j, i));
}
}
free(p);
}
void *rawmemchr$pure(const void *m, int c) {
const unsigned char *s;
for (c &= 255, s = m;; ++s) {
if (*s == c) return s;
}
}
TEST(rawmemchr, fuzz) {
char *p;
int i, j;
p = malloc(64);
for (i = -2; i < 257; ++i) {
for (j = 0; j < 17; ++j) {
rngset(p, 63, rand64, -1);
p[63] = i;
ASSERT_EQ(rawmemchr(p + j, i), rawmemchr$pure(p + j, i));
}
}
free(p);
}