// RUN: %clang_dfsan %s -o %t && DFSAN_OPTIONS="strict_data_dependencies=0" %run %t // RUN: %clang_dfsan -mllvm -dfsan-args-abi %s -o %t && DFSAN_OPTIONS="strict_data_dependencies=0" %run %t // RUN: %clang_dfsan -DSTRICT_DATA_DEPENDENCIES %s -o %t && %run %t // RUN: %clang_dfsan -DSTRICT_DATA_DEPENDENCIES -mllvm -dfsan-args-abi %s -o %t && %run %t // Tests custom implementations of various glibc functions. #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include dfsan_label i_label = 0; dfsan_label j_label = 0; dfsan_label k_label = 0; dfsan_label i_j_label = 0; #define ASSERT_ZERO_LABEL(data) \ assert(0 == dfsan_get_label((long) (data))) #define ASSERT_READ_ZERO_LABEL(ptr, size) \ assert(0 == dfsan_read_label(ptr, size)) #define ASSERT_LABEL(data, label) \ assert(label == dfsan_get_label((long) (data))) #define ASSERT_READ_LABEL(ptr, size, label) \ assert(label == dfsan_read_label(ptr, size)) void test_stat() { int i = 1; dfsan_set_label(i_label, &i, sizeof(i)); struct stat s; s.st_dev = i; assert(0 == stat("/", &s)); ASSERT_ZERO_LABEL(s.st_dev); s.st_dev = i; assert(-1 == stat("/nonexistent", &s)); ASSERT_LABEL(s.st_dev, i_label); } void test_fstat() { int i = 1; dfsan_set_label(i_label, &i, sizeof(i)); struct stat s; int fd = open("/dev/zero", O_RDONLY); s.st_dev = i; int rv = fstat(fd, &s); assert(0 == rv); ASSERT_ZERO_LABEL(s.st_dev); } void test_memcmp() { char str1[] = "str1", str2[] = "str2"; dfsan_set_label(i_label, &str1[3], 1); dfsan_set_label(j_label, &str2[3], 1); int rv = memcmp(str1, str2, sizeof(str1)); assert(rv < 0); #ifdef STRICT_DATA_DEPENDENCIES ASSERT_ZERO_LABEL(rv); #else ASSERT_LABEL(rv, i_j_label); #endif } void test_memcpy() { char str1[] = "str1"; char str2[sizeof(str1)]; dfsan_set_label(i_label, &str1[3], 1); ASSERT_ZERO_LABEL(memcpy(str2, str1, sizeof(str1))); assert(0 == memcmp(str2, str1, sizeof(str1))); ASSERT_ZERO_LABEL(str2[0]); ASSERT_LABEL(str2[3], i_label); } void test_memset() { char buf[8]; int j = 'a'; dfsan_set_label(j_label, &j, sizeof(j)); ASSERT_ZERO_LABEL(memset(&buf, j, sizeof(buf))); for (int i = 0; i < 8; ++i) { ASSERT_LABEL(buf[i], j_label); assert(buf[i] == 'a'); } } void test_strcmp() { char str1[] = "str1", str2[] = "str2"; dfsan_set_label(i_label, &str1[3], 1); dfsan_set_label(j_label, &str2[3], 1); int rv = strcmp(str1, str2); assert(rv < 0); #ifdef STRICT_DATA_DEPENDENCIES ASSERT_ZERO_LABEL(rv); #else ASSERT_LABEL(rv, i_j_label); #endif } void test_strlen() { char str1[] = "str1"; dfsan_set_label(i_label, &str1[3], 1); int rv = strlen(str1); assert(rv == 4); #ifdef STRICT_DATA_DEPENDENCIES ASSERT_ZERO_LABEL(rv); #else ASSERT_LABEL(rv, i_label); #endif } void test_strdup() { char str1[] = "str1"; dfsan_set_label(i_label, &str1[3], 1); char *strd = strdup(str1); ASSERT_ZERO_LABEL(strd[0]); ASSERT_LABEL(strd[3], i_label); free(strd); } void test_strncpy() { char str1[] = "str1"; char str2[sizeof(str1)]; dfsan_set_label(i_label, &str1[3], 1); char *strd = strncpy(str2, str1, 5); assert(strd == str2); assert(strcmp(str1, str2) == 0); ASSERT_ZERO_LABEL(strd); ASSERT_ZERO_LABEL(strd[0]); ASSERT_ZERO_LABEL(strd[1]); ASSERT_ZERO_LABEL(strd[2]); ASSERT_LABEL(strd[3], i_label); strd = strncpy(str2, str1, 3); assert(strd == str2); assert(strncmp(str1, str2, 3) == 0); ASSERT_ZERO_LABEL(strd); ASSERT_ZERO_LABEL(strd[0]); ASSERT_ZERO_LABEL(strd[1]); ASSERT_ZERO_LABEL(strd[2]); } void test_strncmp() { char str1[] = "str1", str2[] = "str2"; dfsan_set_label(i_label, &str1[3], 1); dfsan_set_label(j_label, &str2[3], 1); int rv = strncmp(str1, str2, sizeof(str1)); assert(rv < 0); #ifdef STRICT_DATA_DEPENDENCIES ASSERT_ZERO_LABEL(rv); #else ASSERT_LABEL(rv, dfsan_union(i_label, j_label)); #endif rv = strncmp(str1, str2, 3); assert(rv == 0); ASSERT_ZERO_LABEL(rv); } void test_strcasecmp() { char str1[] = "str1", str2[] = "str2", str3[] = "Str1"; dfsan_set_label(i_label, &str1[3], 1); dfsan_set_label(j_label, &str2[3], 1); dfsan_set_label(j_label, &str3[2], 1); int rv = strcasecmp(str1, str2); assert(rv < 0); #ifdef STRICT_DATA_DEPENDENCIES ASSERT_ZERO_LABEL(rv); #else ASSERT_LABEL(rv, dfsan_union(i_label, j_label)); #endif rv = strcasecmp(str1, str3); assert(rv == 0); #ifdef STRICT_DATA_DEPENDENCIES ASSERT_ZERO_LABEL(rv); #else ASSERT_LABEL(rv, dfsan_union(i_label, j_label)); #endif } void test_strncasecmp() { char str1[] = "Str1", str2[] = "str2"; dfsan_set_label(i_label, &str1[3], 1); dfsan_set_label(j_label, &str2[3], 1); int rv = strncasecmp(str1, str2, sizeof(str1)); assert(rv < 0); #ifdef STRICT_DATA_DEPENDENCIES ASSERT_ZERO_LABEL(rv); #else ASSERT_LABEL(rv, dfsan_union(i_label, j_label)); #endif rv = strncasecmp(str1, str2, 3); assert(rv == 0); ASSERT_ZERO_LABEL(rv); } void test_strchr() { char str1[] = "str1"; dfsan_set_label(i_label, &str1[3], 1); char *crv = strchr(str1, 'r'); assert(crv == &str1[2]); ASSERT_ZERO_LABEL(crv); crv = strchr(str1, '1'); assert(crv == &str1[3]); #ifdef STRICT_DATA_DEPENDENCIES ASSERT_ZERO_LABEL(crv); #else ASSERT_LABEL(crv, i_label); #endif crv = strchr(str1, 'x'); assert(!crv); #ifdef STRICT_DATA_DEPENDENCIES ASSERT_ZERO_LABEL(crv); #else ASSERT_LABEL(crv, i_label); #endif } void test_calloc() { // 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. char *crv = (char *) calloc(4096, 1); ASSERT_ZERO_LABEL(crv[0]); dfsan_set_label(i_label, crv, 100); free(crv); crv = (char *) calloc(4096, 1); ASSERT_ZERO_LABEL(crv[0]); free(crv); } void test_read() { char buf[16]; dfsan_set_label(i_label, buf, 1); dfsan_set_label(j_label, buf + 15, 1); ASSERT_LABEL(buf[0], i_label); ASSERT_LABEL(buf[15], j_label); int fd = open("/dev/zero", O_RDONLY); int rv = read(fd, buf, sizeof(buf)); assert(rv == sizeof(buf)); ASSERT_ZERO_LABEL(rv); ASSERT_ZERO_LABEL(buf[0]); ASSERT_ZERO_LABEL(buf[15]); close(fd); } void test_pread() { char buf[16]; dfsan_set_label(i_label, buf, 1); dfsan_set_label(j_label, buf + 15, 1); ASSERT_LABEL(buf[0], i_label); ASSERT_LABEL(buf[15], j_label); int fd = open("/bin/sh", O_RDONLY); int rv = pread(fd, buf, sizeof(buf), 0); assert(rv == sizeof(buf)); ASSERT_ZERO_LABEL(rv); ASSERT_ZERO_LABEL(buf[0]); ASSERT_ZERO_LABEL(buf[15]); close(fd); } void test_dlopen() { void *map = dlopen(NULL, RTLD_NOW); assert(map); ASSERT_ZERO_LABEL(map); dlclose(map); map = dlopen("/nonexistent", RTLD_NOW); assert(!map); ASSERT_ZERO_LABEL(map); } void test_clock_gettime() { struct timespec tp; dfsan_set_label(j_label, ((char *)&tp) + 3, 1); int t = clock_gettime(CLOCK_REALTIME, &tp); assert(t == 0); ASSERT_ZERO_LABEL(t); ASSERT_ZERO_LABEL(((char *)&tp)[3]); } void test_ctime_r() { char *buf = (char*) malloc(64); time_t t = 0; char *ret = ctime_r(&t, buf); ASSERT_ZERO_LABEL(ret); assert(buf == ret); ASSERT_READ_ZERO_LABEL(buf, strlen(buf) + 1); dfsan_set_label(i_label, &t, sizeof(t)); ret = ctime_r(&t, buf); ASSERT_ZERO_LABEL(ret); ASSERT_READ_LABEL(buf, strlen(buf) + 1, i_label); t = 0; dfsan_set_label(j_label, &buf, sizeof(&buf)); ret = ctime_r(&t, buf); ASSERT_LABEL(ret, j_label); ASSERT_READ_ZERO_LABEL(buf, strlen(buf) + 1); } static int write_callback_count = 0; static int last_fd; static const unsigned char *last_buf; static size_t last_count; void write_callback(int fd, const void *buf, size_t count) { write_callback_count++; last_fd = fd; last_buf = (const unsigned char*) buf; last_count = count; } void test_dfsan_set_write_callback() { char buf[] = "Sample chars"; int buf_len = strlen(buf); int fd = open("/dev/null", O_WRONLY); dfsan_set_write_callback(write_callback); write_callback_count = 0; // Callback should be invoked on every call to write(). int res = write(fd, buf, buf_len); assert(write_callback_count == 1); ASSERT_READ_ZERO_LABEL(&res, sizeof(res)); ASSERT_READ_ZERO_LABEL(&last_fd, sizeof(last_fd)); ASSERT_READ_ZERO_LABEL(last_buf, sizeof(last_buf)); ASSERT_READ_ZERO_LABEL(&last_count, sizeof(last_count)); // Add a label to write() arguments. Check that the labels are readable from // the values passed to the callback. dfsan_set_label(i_label, &fd, sizeof(fd)); dfsan_set_label(j_label, &(buf[3]), 1); dfsan_set_label(k_label, &buf_len, sizeof(buf_len)); res = write(fd, buf, buf_len); assert(write_callback_count == 2); ASSERT_READ_ZERO_LABEL(&res, sizeof(res)); ASSERT_READ_LABEL(&last_fd, sizeof(last_fd), i_label); ASSERT_READ_LABEL(&last_buf[3], sizeof(last_buf[3]), j_label); ASSERT_READ_LABEL(last_buf, sizeof(last_buf), j_label); ASSERT_READ_LABEL(&last_count, sizeof(last_count), k_label); dfsan_set_write_callback(NULL); } void test_fgets() { char *buf = (char*) malloc(128); FILE *f = fopen("/etc/passwd", "r"); dfsan_set_label(j_label, buf, 1); char *ret = fgets(buf, sizeof(buf), f); assert(ret == buf); ASSERT_ZERO_LABEL(ret); ASSERT_READ_ZERO_LABEL(buf, 128); dfsan_set_label(j_label, &buf, sizeof(&buf)); ret = fgets(buf, sizeof(buf), f); ASSERT_LABEL(ret, j_label); fclose(f); } void test_getcwd() { char buf[1024]; char *ptr = buf; dfsan_set_label(i_label, buf + 2, 2); char* ret = getcwd(buf, sizeof(buf)); assert(ret == buf); assert(ret[0] == '/'); ASSERT_READ_ZERO_LABEL(buf + 2, 2); dfsan_set_label(i_label, &ptr, sizeof(ptr)); ret = getcwd(ptr, sizeof(buf)); ASSERT_LABEL(ret, i_label); } void test_get_current_dir_name() { char* ret = get_current_dir_name(); assert(ret); assert(ret[0] == '/'); ASSERT_READ_ZERO_LABEL(ret, strlen(ret) + 1); } void test_gethostname() { char buf[1024]; dfsan_set_label(i_label, buf + 2, 2); assert(gethostname(buf, sizeof(buf)) == 0); ASSERT_READ_ZERO_LABEL(buf + 2, 2); } void test_getrlimit() { struct rlimit rlim; dfsan_set_label(i_label, &rlim, sizeof(rlim)); assert(getrlimit(RLIMIT_CPU, &rlim) == 0); ASSERT_READ_ZERO_LABEL(&rlim, sizeof(rlim)); } void test_getrusage() { struct rusage usage; dfsan_set_label(i_label, &usage, sizeof(usage)); assert(getrusage(RUSAGE_SELF, &usage) == 0); ASSERT_READ_ZERO_LABEL(&usage, sizeof(usage)); } void test_strcpy() { char src[] = "hello world"; char dst[sizeof(src) + 2]; dfsan_set_label(0, src, sizeof(src)); dfsan_set_label(0, dst, sizeof(dst)); dfsan_set_label(i_label, src + 2, 1); dfsan_set_label(j_label, src + 3, 1); dfsan_set_label(j_label, dst + 4, 1); dfsan_set_label(i_label, dst + 12, 1); char *ret = strcpy(dst, src); assert(ret == dst); assert(strcmp(src, dst) == 0); for (int i = 0; i < strlen(src) + 1; ++i) { assert(dfsan_get_label(dst[i]) == dfsan_get_label(src[i])); } // Note: if strlen(src) + 1 were used instead to compute the first untouched // byte of dest, the label would be I|J. This is because strlen() might // return a non-zero label, and because by default pointer labels are not // ignored on loads. ASSERT_LABEL(dst[12], i_label); } void test_strtol() { char buf[] = "1234578910"; char *endptr = NULL; dfsan_set_label(i_label, buf + 1, 1); dfsan_set_label(j_label, buf + 10, 1); long int ret = strtol(buf, &endptr, 10); assert(ret == 1234578910); assert(endptr == buf + 10); ASSERT_LABEL(ret, i_j_label); } void test_strtoll() { char buf[] = "1234578910 "; char *endptr = NULL; dfsan_set_label(i_label, buf + 1, 1); dfsan_set_label(j_label, buf + 2, 1); long long int ret = strtoll(buf, &endptr, 10); assert(ret == 1234578910); assert(endptr == buf + 10); ASSERT_LABEL(ret, i_j_label); } void test_strtoul() { char buf[] = "0xffffffffffffaa"; char *endptr = NULL; dfsan_set_label(i_label, buf + 1, 1); dfsan_set_label(j_label, buf + 2, 1); long unsigned int ret = strtol(buf, &endptr, 16); assert(ret == 72057594037927850); assert(endptr == buf + 16); ASSERT_LABEL(ret, i_j_label); } void test_strtoull() { char buf[] = "0xffffffffffffffaa"; char *endptr = NULL; dfsan_set_label(i_label, buf + 1, 1); dfsan_set_label(j_label, buf + 2, 1); long long unsigned int ret = strtoull(buf, &endptr, 16); assert(ret == 0xffffffffffffffaa); assert(endptr == buf + 18); ASSERT_LABEL(ret, i_j_label); } void test_strtod() { char buf[] = "12345.76 foo"; char *endptr = NULL; dfsan_set_label(i_label, buf + 1, 1); dfsan_set_label(j_label, buf + 6, 1); double ret = strtod(buf, &endptr); assert(ret == 12345.76); assert(endptr == buf + 8); ASSERT_LABEL(ret, i_j_label); } void test_time() { time_t t = 0; dfsan_set_label(i_label, &t, 1); time_t ret = time(&t); assert(ret == t); assert(ret > 0); ASSERT_ZERO_LABEL(t); } void test_inet_pton() { char addr4[] = "127.0.0.1"; dfsan_set_label(i_label, addr4 + 3, 1); struct in_addr in4; int ret4 = inet_pton(AF_INET, addr4, &in4); assert(ret4 == 1); ASSERT_READ_LABEL(&in4, sizeof(in4), i_label); assert(in4.s_addr == htonl(0x7f000001)); char addr6[] = "::1"; dfsan_set_label(j_label, addr6 + 3, 1); struct in6_addr in6; int ret6 = inet_pton(AF_INET6, addr6, &in6); assert(ret6 == 1); ASSERT_READ_LABEL(((char *) &in6) + sizeof(in6) - 1, 1, j_label); } void test_localtime_r() { time_t t0 = 1384800998; struct tm t1; dfsan_set_label(i_label, &t0, sizeof(t0)); struct tm* ret = localtime_r(&t0, &t1); assert(ret == &t1); assert(t1.tm_min == 56); ASSERT_LABEL(t1.tm_mon, i_label); } void test_getpwuid_r() { struct passwd pwd; char buf[1024]; struct passwd *result; dfsan_set_label(i_label, &pwd, 4); int ret = getpwuid_r(0, &pwd, buf, sizeof(buf), &result); assert(ret == 0); assert(strcmp(pwd.pw_name, "root") == 0); assert(result == &pwd); ASSERT_READ_ZERO_LABEL(&pwd, 4); } void test_poll() { struct pollfd fd; fd.fd = 0; fd.events = POLLIN; dfsan_set_label(i_label, &fd.revents, sizeof(fd.revents)); int ret = poll(&fd, 1, 1); ASSERT_ZERO_LABEL(fd.revents); assert(ret >= 0); } void test_select() { struct timeval t; fd_set fds; t.tv_sec = 2; FD_SET(0, &fds); dfsan_set_label(i_label, &fds, sizeof(fds)); dfsan_set_label(j_label, &t, sizeof(t)); int ret = select(1, &fds, NULL, NULL, &t); assert(ret >= 0); ASSERT_ZERO_LABEL(t.tv_sec); ASSERT_READ_ZERO_LABEL(&fds, sizeof(fds)); } void test_sched_getaffinity() { cpu_set_t mask; dfsan_set_label(j_label, &mask, 1); int ret = sched_getaffinity(0, sizeof(mask), &mask); assert(ret == 0); ASSERT_READ_ZERO_LABEL(&mask, sizeof(mask)); } void test_sigemptyset() { sigset_t set; dfsan_set_label(j_label, &set, 1); int ret = sigemptyset(&set); assert(ret == 0); ASSERT_READ_ZERO_LABEL(&set, sizeof(set)); } void test_sigaction() { struct sigaction oldact; dfsan_set_label(j_label, &oldact, 1); int ret = sigaction(SIGUSR1, NULL, &oldact); assert(ret == 0); ASSERT_READ_ZERO_LABEL(&oldact, sizeof(oldact)); } void test_gettimeofday() { struct timeval tv; struct timezone tz; dfsan_set_label(i_label, &tv, sizeof(tv)); dfsan_set_label(j_label, &tz, sizeof(tz)); int ret = gettimeofday(&tv, &tz); assert(ret == 0); ASSERT_READ_ZERO_LABEL(&tv, sizeof(tv)); ASSERT_READ_ZERO_LABEL(&tz, sizeof(tz)); } void *pthread_create_test_cb(void *p) { assert(p == (void *)1); ASSERT_ZERO_LABEL(p); return (void *)2; } void test_pthread_create() { pthread_t pt; pthread_create(&pt, 0, pthread_create_test_cb, (void *)1); void *cbrv; pthread_join(pt, &cbrv); assert(cbrv == (void *)2); } int dl_iterate_phdr_test_cb(struct dl_phdr_info *info, size_t size, void *data) { assert(data == (void *)3); ASSERT_ZERO_LABEL(info); ASSERT_ZERO_LABEL(size); ASSERT_ZERO_LABEL(data); return 0; } void test_dl_iterate_phdr() { dl_iterate_phdr(dl_iterate_phdr_test_cb, (void *)3); } void test_strrchr() { char str1[] = "str1str1"; dfsan_set_label(i_label, &str1[7], 1); char *rv = strrchr(str1, 'r'); assert(rv == &str1[6]); #ifdef STRICT_DATA_DEPENDENCIES ASSERT_ZERO_LABEL(rv); #else ASSERT_LABEL(rv, i_label); #endif } void test_strstr() { char str1[] = "str1str1"; dfsan_set_label(i_label, &str1[3], 1); dfsan_set_label(j_label, &str1[5], 1); char *rv = strstr(str1, "1s"); assert(rv == &str1[3]); #ifdef STRICT_DATA_DEPENDENCIES ASSERT_ZERO_LABEL(rv); #else ASSERT_LABEL(rv, i_label); #endif rv = strstr(str1, "2s"); assert(rv == NULL); #ifdef STRICT_DATA_DEPENDENCIES ASSERT_ZERO_LABEL(rv); #else ASSERT_LABEL(rv, i_j_label); #endif } void test_memchr() { char str1[] = "str1"; dfsan_set_label(i_label, &str1[3], 1); dfsan_set_label(j_label, &str1[4], 1); char *crv = (char *) memchr(str1, 'r', sizeof(str1)); assert(crv == &str1[2]); ASSERT_ZERO_LABEL(crv); crv = (char *) memchr(str1, '1', sizeof(str1)); assert(crv == &str1[3]); #ifdef STRICT_DATA_DEPENDENCIES ASSERT_ZERO_LABEL(crv); #else ASSERT_LABEL(crv, i_label); #endif crv = (char *) memchr(str1, 'x', sizeof(str1)); assert(!crv); #ifdef STRICT_DATA_DEPENDENCIES ASSERT_ZERO_LABEL(crv); #else ASSERT_LABEL(crv, i_j_label); #endif } void alarm_handler(int unused) { ; } void test_nanosleep() { struct timespec req, rem; req.tv_sec = 1; req.tv_nsec = 0; dfsan_set_label(i_label, &rem, sizeof(rem)); // non interrupted int rv = nanosleep(&req, &rem); assert(rv == 0); ASSERT_ZERO_LABEL(rv); ASSERT_READ_LABEL(&rem, 1, i_label); // interrupted by an alarm signal(SIGALRM, alarm_handler); req.tv_sec = 3; alarm(1); rv = nanosleep(&req, &rem); assert(rv == -1); ASSERT_ZERO_LABEL(rv); ASSERT_READ_ZERO_LABEL(&rem, sizeof(rem)); } void test_socketpair() { int fd[2]; dfsan_set_label(i_label, fd, sizeof(fd)); int rv = socketpair(PF_LOCAL, SOCK_STREAM, 0, fd); assert(rv == 0); ASSERT_ZERO_LABEL(rv); ASSERT_READ_ZERO_LABEL(fd, sizeof(fd)); } void test_write() { int fd = open("/dev/null", O_WRONLY); char buf[] = "a string"; int len = strlen(buf); // The result of a write always unlabeled. int res = write(fd, buf, len); assert(res > 0); ASSERT_ZERO_LABEL(res); // Label all arguments to write(). dfsan_set_label(i_label, &(buf[3]), 1); dfsan_set_label(j_label, &fd, sizeof(fd)); dfsan_set_label(i_label, &len, sizeof(len)); // The value returned by write() should have no label. res = write(fd, buf, len); ASSERT_ZERO_LABEL(res); close(fd); } template void test_sprintf_chunk(const char* expected, const char* format, T arg) { char buf[512]; memset(buf, 'a', sizeof(buf)); char padded_expected[512]; strcpy(padded_expected, "foo "); strcat(padded_expected, expected); strcat(padded_expected, " bar"); char padded_format[512]; strcpy(padded_format, "foo "); strcat(padded_format, format); strcat(padded_format, " bar"); // Non labelled arg. assert(sprintf(buf, padded_format, arg) == strlen(padded_expected)); assert(strcmp(buf, padded_expected) == 0); ASSERT_READ_LABEL(buf, strlen(padded_expected), 0); memset(buf, 'a', sizeof(buf)); // Labelled arg. dfsan_set_label(i_label, &arg, sizeof(arg)); assert(sprintf(buf, padded_format, arg) == strlen(padded_expected)); assert(strcmp(buf, padded_expected) == 0); ASSERT_READ_LABEL(buf, 4, 0); ASSERT_READ_LABEL(buf + 4, strlen(padded_expected) - 8, i_label); ASSERT_READ_LABEL(buf + (strlen(padded_expected) - 4), 4, 0); } void test_sprintf() { char buf[2048]; memset(buf, 'a', sizeof(buf)); // Test formatting (no conversion specifier). assert(sprintf(buf, "Hello world!") == 12); assert(strcmp(buf, "Hello world!") == 0); ASSERT_READ_LABEL(buf, sizeof(buf), 0); // Test for extra arguments. assert(sprintf(buf, "Hello world!", 42, "hello") == 12); assert(strcmp(buf, "Hello world!") == 0); ASSERT_READ_LABEL(buf, sizeof(buf), 0); // Test formatting & label propagation (multiple conversion specifiers): %s, // %d, %n, %f, and %%. const char* s = "world"; int m = 8; int d = 27; dfsan_set_label(k_label, (void *) (s + 1), 2); dfsan_set_label(i_label, &m, sizeof(m)); dfsan_set_label(j_label, &d, sizeof(d)); int n; int r = sprintf(buf, "hello %s, %-d/%d/%d %f %% %n%d", s, 2014, m, d, 12345.6781234, &n, 1000); assert(r == 42); assert(strcmp(buf, "hello world, 2014/8/27 12345.678123 % 1000") == 0); ASSERT_READ_LABEL(buf, 7, 0); ASSERT_READ_LABEL(buf + 7, 2, k_label); ASSERT_READ_LABEL(buf + 9, 9, 0); ASSERT_READ_LABEL(buf + 18, 1, i_label); ASSERT_READ_LABEL(buf + 19, 1, 0); ASSERT_READ_LABEL(buf + 20, 2, j_label); ASSERT_READ_LABEL(buf + 22, 15, 0); ASSERT_LABEL(r, 0); assert(n == 38); // Test formatting & label propagation (single conversion specifier, with // additional length and precision modifiers). test_sprintf_chunk("-559038737", "%d", 0xdeadbeef); test_sprintf_chunk("3735928559", "%u", 0xdeadbeef); test_sprintf_chunk("12345", "%i", 12345); test_sprintf_chunk("751", "%o", 0751); test_sprintf_chunk("babe", "%x", 0xbabe); test_sprintf_chunk("0000BABE", "%.8X", 0xbabe); test_sprintf_chunk("-17", "%hhd", 0xdeadbeef); test_sprintf_chunk("-16657", "%hd", 0xdeadbeef); test_sprintf_chunk("deadbeefdeadbeef", "%lx", 0xdeadbeefdeadbeef); test_sprintf_chunk("0xdeadbeefdeadbeef", "%p", (void *) 0xdeadbeefdeadbeef); test_sprintf_chunk("18446744073709551615", "%ju", (intmax_t) -1); test_sprintf_chunk("18446744073709551615", "%zu", (size_t) -1); test_sprintf_chunk("18446744073709551615", "%tu", (size_t) -1); test_sprintf_chunk("0x1.f9acffa7eb6bfp-4", "%a", 0.123456); test_sprintf_chunk("0X1.F9ACFFA7EB6BFP-4", "%A", 0.123456); test_sprintf_chunk("0.12346", "%.5f", 0.123456); test_sprintf_chunk("0.123456", "%g", 0.123456); test_sprintf_chunk("1.234560e-01", "%e", 0.123456); test_sprintf_chunk("1.234560E-01", "%E", 0.123456); test_sprintf_chunk("0.1234567891234560", "%.16Lf", (long double) 0.123456789123456); test_sprintf_chunk("z", "%c", 'z'); // %n, %s, %d, %f, and %% already tested // Test formatting with width passed as an argument. r = sprintf(buf, "hi %*d my %*s friend %.*f", 3, 1, 6, "dear", 4, 3.14159265359); assert(r == 30); assert(strcmp(buf, "hi 1 my dear friend 3.1416") == 0); } void test_snprintf() { char buf[2048]; memset(buf, 'a', sizeof(buf)); dfsan_set_label(0, buf, sizeof(buf)); const char* s = "world"; int y = 2014; int m = 8; int d = 27; dfsan_set_label(k_label, (void *) (s + 1), 2); dfsan_set_label(i_label, &y, sizeof(y)); dfsan_set_label(j_label, &m, sizeof(m)); int r = snprintf(buf, 19, "hello %s, %-d/%d/%d %f", s, y, m, d, 12345.6781234); // The return value is the number of bytes that would have been written to // the final string if enough space had been available. assert(r == 35); assert(memcmp(buf, "hello world, 2014/", 19) == 0); ASSERT_READ_LABEL(buf, 7, 0); ASSERT_READ_LABEL(buf + 7, 2, k_label); ASSERT_READ_LABEL(buf + 9, 4, 0); ASSERT_READ_LABEL(buf + 13, 4, i_label); ASSERT_READ_LABEL(buf + 17, 2, 0); ASSERT_LABEL(r, 0); } int main(void) { i_label = dfsan_create_label("i", 0); j_label = dfsan_create_label("j", 0); k_label = dfsan_create_label("k", 0); i_j_label = dfsan_union(i_label, j_label); test_calloc(); test_clock_gettime(); test_ctime_r(); test_dfsan_set_write_callback(); test_dl_iterate_phdr(); test_dlopen(); test_fgets(); test_fstat(); test_get_current_dir_name(); test_getcwd(); test_gethostname(); test_getpwuid_r(); test_getrlimit(); test_getrusage(); test_gettimeofday(); test_inet_pton(); test_localtime_r(); test_memchr(); test_memcmp(); test_memcpy(); test_memset(); test_nanosleep(); test_poll(); test_pread(); test_pthread_create(); test_read(); test_sched_getaffinity(); test_select(); test_sigaction(); test_sigemptyset(); test_snprintf(); test_socketpair(); test_sprintf(); test_stat(); test_strcasecmp(); test_strchr(); test_strcmp(); test_strcpy(); test_strdup(); test_strlen(); test_strncasecmp(); test_strncmp(); test_strncpy(); test_strrchr(); test_strstr(); test_strtod(); test_strtol(); test_strtoll(); test_strtoul(); test_strtoull(); test_time(); test_write(); }