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// RUN: %clang_dfsan -m64 %s -o %t && %t
// RUN: %clang_dfsan -mllvm -dfsan-args-abi -m64 %s -o %t && %t
// Tests custom implementations of various libc functions.
#define _GNU_SOURCE
#include <sanitizer/dfsan_interface.h>
#include <assert.h>
#include <link.h>
#include <pthread.h>
#include <string.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
void *ptcb(void *p) {
assert(p == (void *)1);
assert(dfsan_get_label((uintptr_t)p) == 0);
return (void *)2;
}
int dlcb(struct dl_phdr_info *info, size_t size, void *data) {
assert(data == (void *)3);
assert(dfsan_get_label((uintptr_t)info) == 0);
assert(dfsan_get_label(size) == 0);
assert(dfsan_get_label((uintptr_t)data) == 0);
return 0;
}
int main(void) {
int i = 1;
dfsan_label i_label = dfsan_create_label("i", 0);
dfsan_set_label(i_label, &i, sizeof(i));
int j = 2;
dfsan_label j_label = dfsan_create_label("j", 0);
dfsan_set_label(j_label, &j, sizeof(j));
struct stat s;
s.st_dev = i;
int rv = stat("/", &s);
assert(rv == 0);
assert(dfsan_get_label(s.st_dev) == 0);
s.st_dev = i;
rv = stat("/nonexistent", &s);
assert(rv == -1);
assert(dfsan_get_label(s.st_dev) == i_label);
int fd = open("/dev/zero", O_RDONLY);
s.st_dev = i;
rv = fstat(fd, &s);
assert(rv == 0);
assert(dfsan_get_label(s.st_dev) == 0);
char str1[] = "str1", str2[] = "str2";
dfsan_set_label(i_label, &str1[3], 1);
dfsan_set_label(j_label, &str2[3], 1);
rv = memcmp(str1, str2, sizeof(str1));
assert(rv < 0);
assert(dfsan_get_label(rv) == dfsan_union(i_label, j_label));
char strc[sizeof(str1)];
memcpy(strc, str1, sizeof(str1));
assert(dfsan_get_label(strc[0]) == 0);
assert(dfsan_get_label(strc[3]) == i_label);
memset(strc, j, sizeof(strc));
assert(dfsan_get_label(strc[0]) == j_label);
assert(dfsan_get_label(strc[1]) == j_label);
assert(dfsan_get_label(strc[2]) == j_label);
assert(dfsan_get_label(strc[3]) == j_label);
assert(dfsan_get_label(strc[4]) == j_label);
rv = strcmp(str1, str2);
assert(rv < 0);
assert(dfsan_get_label(rv) == dfsan_union(i_label, j_label));
char *strd = strdup(str1);
assert(dfsan_get_label(strd[0]) == 0);
assert(dfsan_get_label(strd[3]) == i_label);
free(strd);
rv = strncmp(str1, str2, sizeof(str1));
assert(rv < 0);
assert(dfsan_get_label(rv) == dfsan_union(i_label, j_label));
rv = strncmp(str1, str2, 3);
assert(rv == 0);
assert(dfsan_get_label(rv) == 0);
str1[0] = 'S';
rv = strncasecmp(str1, str2, sizeof(str1));
assert(rv < 0);
assert(dfsan_get_label(rv) == dfsan_union(i_label, j_label));
rv = strncasecmp(str1, str2, 3);
assert(rv == 0);
assert(dfsan_get_label(rv) == 0);
char *crv = strchr(str1, 'r');
assert(crv == &str1[2]);
assert(dfsan_get_label((uintptr_t)crv) == 0);
crv = strchr(str1, '1');
assert(crv == &str1[3]);
assert(dfsan_get_label((uintptr_t)crv) == i_label);
crv = strchr(str1, 'x');
assert(crv == 0);
assert(dfsan_get_label((uintptr_t)crv) == i_label);
// With any luck this sequence of calls will cause calloc to return the same
// pointer both times. This is probably the best we can do to test this
// function.
crv = calloc(4096, 1);
assert(dfsan_get_label(crv[0]) == 0);
free(crv);
crv = calloc(4096, 1);
assert(dfsan_get_label(crv[0]) == 0);
free(crv);
char buf[16];
buf[0] = i;
buf[15] = j;
rv = read(fd, buf, sizeof(buf));
assert(rv == sizeof(buf));
assert(dfsan_get_label(buf[0]) == 0);
assert(dfsan_get_label(buf[15]) == 0);
close(fd);
fd = open("/bin/sh", O_RDONLY);
buf[0] = i;
buf[15] = j;
rv = pread(fd, buf, sizeof(buf), 0);
assert(rv == sizeof(buf));
assert(dfsan_get_label(buf[0]) == 0);
assert(dfsan_get_label(buf[15]) == 0);
pthread_t pt;
pthread_create(&pt, 0, ptcb, (void *)1);
void *cbrv;
pthread_join(pt, &cbrv);
assert(cbrv == (void *)2);
dl_iterate_phdr(dlcb, (void *)3);
return 0;
}
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