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platform_bionic/tests/fortify_test.cpp
Stephen Hines 6e38072add Wrap sprintf()/snprintf() macros to prevent expansion errors. 
Previously, FORTIFY_SOURCE used single macros to define these standard
functions for use with clang. This can cause conflicts with other macros used
to call these functions, particularly when those macros expand the number of
arguments to the function. This change wraps our macro definitions, so that
expansion properly takes place for programmer arguments first.

Change-Id: I55929b1fd2a643b9d14a17631c4bcab3b0b712cf
2013-10-11 12:14:49 -07:00

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/*
* Copyright (C) 2013 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <gtest/gtest.h>
#include <string.h>
#include <stdarg.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/socket.h>
#include <malloc.h>
#include <fcntl.h>
// We have to say "DeathTest" here so gtest knows to run this test (which exits)
// in its own process. Unfortunately, the C preprocessor doesn't give us an
// easy way to concatenate strings, so we need to use the complicated method
// below. *sigh*
#define DEATHTEST_PASTER(name) name##_DeathTest
#define DEATHTEST_EVALUATOR(name) DEATHTEST_PASTER(name)
#define DEATHTEST DEATHTEST_EVALUATOR(TEST_NAME)
#if defined(_FORTIFY_SOURCE) && _FORTIFY_SOURCE == 2
struct foo {
char empty[0];
char one[1];
char a[10];
char b[10];
};
#ifndef __clang__
// This test is disabled in clang because clang doesn't properly detect
// this buffer overflow. TODO: Fix clang.
TEST(DEATHTEST, strncpy_fortified2) {
::testing::FLAGS_gtest_death_test_style = "threadsafe";
foo myfoo;
int copy_amt = atoi("11");
ASSERT_EXIT(strncpy(myfoo.a, "01234567890", copy_amt),
testing::KilledBySignal(SIGABRT), "");
}
#endif
#ifndef __clang__
// This test is disabled in clang because clang doesn't properly detect
// this buffer overflow. TODO: Fix clang.
TEST(DEATHTEST, strncpy2_fortified2) {
::testing::FLAGS_gtest_death_test_style = "threadsafe";
foo myfoo;
memset(&myfoo, 0, sizeof(myfoo));
myfoo.one[0] = 'A'; // not null terminated string
ASSERT_EXIT(strncpy(myfoo.b, myfoo.one, sizeof(myfoo.b)),
testing::KilledBySignal(SIGABRT), "");
}
#endif
#ifndef __clang__
// This test is disabled in clang because clang doesn't properly detect
// this buffer overflow. TODO: Fix clang.
TEST(DEATHTEST, sprintf_fortified2) {
::testing::FLAGS_gtest_death_test_style = "threadsafe";
foo myfoo;
char source_buf[15];
memcpy(source_buf, "12345678901234", 15);
ASSERT_EXIT(sprintf(myfoo.a, "%s", source_buf),
testing::KilledBySignal(SIGABRT), "");
}
#endif
#ifndef __clang__
// This test is disabled in clang because clang doesn't properly detect
// this buffer overflow. TODO: Fix clang.
TEST(DEATHTEST, sprintf2_fortified2) {
::testing::FLAGS_gtest_death_test_style = "threadsafe";
foo myfoo;
ASSERT_EXIT(sprintf(myfoo.a, "0123456789"),
testing::KilledBySignal(SIGABRT), "");
}
#endif
#ifndef __clang__
// These tests are disabled in clang because clang doesn't properly detect
// this buffer overflow. TODO: Fix clang.
static int vsprintf_helper2(const char *fmt, ...) {
foo myfoo;
va_list va;
int result;
va_start(va, fmt);
result = vsprintf(myfoo.a, fmt, va); // should crash here
va_end(va);
return result;
}
TEST(DEATHTEST, vsprintf_fortified2) {
::testing::FLAGS_gtest_death_test_style = "threadsafe";
ASSERT_EXIT(vsprintf_helper2("%s", "0123456789"), testing::KilledBySignal(SIGABRT), "");
}
TEST(DEATHTEST, vsprintf2_fortified2) {
::testing::FLAGS_gtest_death_test_style = "threadsafe";
ASSERT_EXIT(vsprintf_helper2("0123456789"), testing::KilledBySignal(SIGABRT), "");
}
#endif
#ifndef __clang__
// These tests are disabled in clang because clang doesn't properly detect
// this buffer overflow. TODO: Fix clang.
static int vsnprintf_helper2(const char *fmt, ...) {
foo myfoo;
va_list va;
int result;
size_t size = atoi("11");
va_start(va, fmt);
result = vsnprintf(myfoo.a, size, fmt, va); // should crash here
va_end(va);
return result;
}
TEST(DEATHTEST, vsnprintf_fortified2) {
::testing::FLAGS_gtest_death_test_style = "threadsafe";
ASSERT_EXIT(vsnprintf_helper2("%s", "0123456789"), testing::KilledBySignal(SIGABRT), "");
}
TEST(DEATHTEST, vsnprintf2_fortified2) {
::testing::FLAGS_gtest_death_test_style = "threadsafe";
ASSERT_EXIT(vsnprintf_helper2("0123456789"), testing::KilledBySignal(SIGABRT), "");
}
#endif
#if __BIONIC__
#ifndef __clang__
// zero sized target with "\0" source (should fail)
// This test is disabled in clang because clang doesn't properly detect
// this buffer overflow. TODO: Fix clang.
TEST(DEATHTEST, strcpy_fortified2) {
::testing::FLAGS_gtest_death_test_style = "threadsafe";
foo myfoo;
char* src = strdup("");
ASSERT_EXIT(strcpy(myfoo.empty, src),
testing::KilledBySignal(SIGABRT), "");
free(src);
}
#endif
#ifndef __clang__
// zero sized target with longer source (should fail)
// This test is disabled in clang because clang doesn't properly detect
// this buffer overflow. TODO: Fix clang.
TEST(DEATHTEST, strcpy2_fortified2) {
::testing::FLAGS_gtest_death_test_style = "threadsafe";
foo myfoo;
char* src = strdup("1");
ASSERT_EXIT(strcpy(myfoo.empty, src),
testing::KilledBySignal(SIGABRT), "");
free(src);
}
#endif
#ifndef __clang__
// one byte target with longer source (should fail)
// This test is disabled in clang because clang doesn't properly detect
// this buffer overflow. TODO: Fix clang.
TEST(DEATHTEST, strcpy3_fortified2) {
::testing::FLAGS_gtest_death_test_style = "threadsafe";
foo myfoo;
char* src = strdup("12");
ASSERT_EXIT(strcpy(myfoo.one, src),
testing::KilledBySignal(SIGABRT), "");
free(src);
}
#endif
#ifndef __clang__
// This test is disabled in clang because clang doesn't properly detect
// this buffer overflow. TODO: Fix clang.
TEST(DEATHTEST, strchr_fortified2) {
::testing::FLAGS_gtest_death_test_style = "threadsafe";
foo myfoo;
memcpy(myfoo.a, "0123456789", sizeof(myfoo.a));
myfoo.b[0] = '\0';
ASSERT_EXIT(printf("%s", strchr(myfoo.a, 'a')),
testing::KilledBySignal(SIGABRT), "");
}
#endif
#ifndef __clang__
// This test is disabled in clang because clang doesn't properly detect
// this buffer overflow. TODO: Fix clang.
TEST(DEATHTEST, strrchr_fortified2) {
::testing::FLAGS_gtest_death_test_style = "threadsafe";
foo myfoo;
memcpy(myfoo.a, "0123456789", 10);
memcpy(myfoo.b, "01234", 6);
ASSERT_EXIT(printf("%s", strrchr(myfoo.a, 'a')),
testing::KilledBySignal(SIGABRT), "");
}
#endif
#ifndef __clang__
// This test is disabled in clang because clang doesn't properly detect
// this buffer overflow. TODO: Fix clang.
TEST(DEATHTEST, strlcpy_fortified2) {
::testing::FLAGS_gtest_death_test_style = "threadsafe";
foo myfoo;
strcpy(myfoo.a, "01");
size_t n = strlen(myfoo.a);
ASSERT_EXIT(strlcpy(myfoo.one, myfoo.a, n),
testing::KilledBySignal(SIGABRT), "");
}
#endif
#ifndef __clang__
// This test is disabled in clang because clang doesn't properly detect
// this buffer overflow. TODO: Fix clang.
TEST(DEATHTEST, strlcat_fortified2) {
::testing::FLAGS_gtest_death_test_style = "threadsafe";
foo myfoo;
strcpy(myfoo.a, "01");
myfoo.one[0] = '\0';
size_t n = strlen(myfoo.a);
ASSERT_EXIT(strlcat(myfoo.one, myfoo.a, n),
testing::KilledBySignal(SIGABRT), "");
}
#endif
#endif /* __BIONIC__ */
#ifndef __clang__
// This test is disabled in clang because clang doesn't properly detect
// this buffer overflow. TODO: Fix clang.
TEST(DEATHTEST, strncat_fortified2) {
::testing::FLAGS_gtest_death_test_style = "threadsafe";
foo myfoo;
size_t n = atoi("10"); // avoid compiler optimizations
strncpy(myfoo.a, "012345678", n);
ASSERT_EXIT(strncat(myfoo.a, "9", n), testing::KilledBySignal(SIGABRT), "");
}
#endif
#ifndef __clang__
// This test is disabled in clang because clang doesn't properly detect
// this buffer overflow. TODO: Fix clang.
TEST(DEATHTEST, strncat2_fortified2) {
::testing::FLAGS_gtest_death_test_style = "threadsafe";
foo myfoo;
myfoo.a[0] = '\0';
size_t n = atoi("10"); // avoid compiler optimizations
ASSERT_EXIT(strncat(myfoo.a, "0123456789", n), testing::KilledBySignal(SIGABRT), "");
}
#endif
TEST(DEATHTEST, strncat3_fortified2) {
::testing::FLAGS_gtest_death_test_style = "threadsafe";
foo myfoo;
memcpy(myfoo.a, "0123456789", sizeof(myfoo.a)); // unterminated string
myfoo.b[0] = '\0';
size_t n = atoi("10"); // avoid compiler optimizations
ASSERT_EXIT(strncat(myfoo.b, myfoo.a, n), testing::KilledBySignal(SIGABRT), "");
}
#ifndef __clang__
// This test is disabled in clang because clang doesn't properly detect
// this buffer overflow. TODO: Fix clang.
TEST(DEATHTEST, strcat_fortified2) {
::testing::FLAGS_gtest_death_test_style = "threadsafe";
char src[11];
strcpy(src, "0123456789");
foo myfoo;
myfoo.a[0] = '\0';
ASSERT_EXIT(strcat(myfoo.a, src), testing::KilledBySignal(SIGABRT), "");
}
#endif
TEST(DEATHTEST, strcat2_fortified2) {
::testing::FLAGS_gtest_death_test_style = "threadsafe";
foo myfoo;
memcpy(myfoo.a, "0123456789", sizeof(myfoo.a)); // unterminated string
myfoo.b[0] = '\0';
ASSERT_EXIT(strcat(myfoo.b, myfoo.a), testing::KilledBySignal(SIGABRT), "");
}
TEST(DEATHTEST, snprintf_fortified2) {
::testing::FLAGS_gtest_death_test_style = "threadsafe";
foo myfoo;
strcpy(myfoo.a, "012345678");
size_t n = strlen(myfoo.a) + 2;
ASSERT_EXIT(snprintf(myfoo.b, n, "a%s", myfoo.a), testing::KilledBySignal(SIGABRT), "");
}
TEST(DEATHTEST, bzero_fortified2) {
::testing::FLAGS_gtest_death_test_style = "threadsafe";
foo myfoo;
memcpy(myfoo.b, "0123456789", sizeof(myfoo.b));
size_t n = atoi("11");
ASSERT_EXIT(bzero(myfoo.b, n), testing::KilledBySignal(SIGABRT), "");
}
#endif /* defined(_FORTIFY_SOURCE) && _FORTIFY_SOURCE=2 */
#if __BIONIC__
// multibyte target where we over fill (should fail)
TEST(DEATHTEST, strcpy_fortified) {
::testing::FLAGS_gtest_death_test_style = "threadsafe";
char buf[10];
char *orig = strdup("0123456789");
ASSERT_EXIT(strcpy(buf, orig), testing::KilledBySignal(SIGABRT), "");
free(orig);
}
// zero sized target with "\0" source (should fail)
TEST(DEATHTEST, strcpy2_fortified) {
::testing::FLAGS_gtest_death_test_style = "threadsafe";
char buf[0];
char *orig = strdup("");
ASSERT_EXIT(strcpy(buf, orig), testing::KilledBySignal(SIGABRT), "");
free(orig);
}
// zero sized target with longer source (should fail)
TEST(DEATHTEST, strcpy3_fortified) {
::testing::FLAGS_gtest_death_test_style = "threadsafe";
char buf[0];
char *orig = strdup("1");
ASSERT_EXIT(strcpy(buf, orig), testing::KilledBySignal(SIGABRT), "");
free(orig);
}
// one byte target with longer source (should fail)
TEST(DEATHTEST, strcpy4_fortified) {
::testing::FLAGS_gtest_death_test_style = "threadsafe";
char buf[1];
char *orig = strdup("12");
ASSERT_EXIT(strcpy(buf, orig), testing::KilledBySignal(SIGABRT), "");
free(orig);
}
TEST(DEATHTEST, strlen_fortified) {
::testing::FLAGS_gtest_death_test_style = "threadsafe";
char buf[10];
memcpy(buf, "0123456789", sizeof(buf));
ASSERT_EXIT(printf("%zd", strlen(buf)), testing::KilledBySignal(SIGABRT), "");
}
TEST(DEATHTEST, strchr_fortified) {
::testing::FLAGS_gtest_death_test_style = "threadsafe";
char buf[10];
memcpy(buf, "0123456789", sizeof(buf));
ASSERT_EXIT(printf("%s", strchr(buf, 'a')), testing::KilledBySignal(SIGABRT), "");
}
TEST(DEATHTEST, strrchr_fortified) {
::testing::FLAGS_gtest_death_test_style = "threadsafe";
char buf[10];
memcpy(buf, "0123456789", sizeof(buf));
ASSERT_EXIT(printf("%s", strrchr(buf, 'a')), testing::KilledBySignal(SIGABRT), "");
}
TEST(DEATHTEST, strlcpy_fortified) {
::testing::FLAGS_gtest_death_test_style = "threadsafe";
char bufa[15];
char bufb[10];
strcpy(bufa, "01234567890123");
size_t n = strlen(bufa);
ASSERT_EXIT(strlcpy(bufb, bufa, n), testing::KilledBySignal(SIGABRT), "");
}
TEST(DEATHTEST, strlcat_fortified) {
::testing::FLAGS_gtest_death_test_style = "threadsafe";
char bufa[15];
char bufb[10];
bufb[0] = '\0';
strcpy(bufa, "01234567890123");
size_t n = strlen(bufa);
ASSERT_EXIT(strlcat(bufb, bufa, n), testing::KilledBySignal(SIGABRT), "");
}
#endif
TEST(DEATHTEST, sprintf_fortified) {
::testing::FLAGS_gtest_death_test_style = "threadsafe";
char buf[10];
char source_buf[15];
memcpy(source_buf, "12345678901234", 15);
ASSERT_EXIT(sprintf(buf, "%s", source_buf), testing::KilledBySignal(SIGABRT), "");
}
#ifndef __clang__
// This test is disabled in clang because clang doesn't properly detect
// this buffer overflow. TODO: Fix clang.
TEST(DEATHTEST, sprintf_malloc_fortified) {
::testing::FLAGS_gtest_death_test_style = "threadsafe";
char* buf = (char *) malloc(10);
char source_buf[11];
memcpy(source_buf, "1234567890", 11);
ASSERT_EXIT(sprintf(buf, "%s", source_buf), testing::KilledBySignal(SIGABRT), "");
free(buf);
}
#endif
TEST(DEATHTEST, sprintf2_fortified) {
::testing::FLAGS_gtest_death_test_style = "threadsafe";
char buf[5];
ASSERT_EXIT(sprintf(buf, "aaaaa"), testing::KilledBySignal(SIGABRT), "");
}
static int vsprintf_helper(const char *fmt, ...) {
char buf[10];
va_list va;
int result;
va_start(va, fmt);
result = vsprintf(buf, fmt, va); // should crash here
va_end(va);
return result;
}
TEST(DEATHTEST, vsprintf_fortified) {
::testing::FLAGS_gtest_death_test_style = "threadsafe";
ASSERT_EXIT(vsprintf_helper("%s", "0123456789"), testing::KilledBySignal(SIGABRT), "");
}
TEST(DEATHTEST, vsprintf2_fortified) {
::testing::FLAGS_gtest_death_test_style = "threadsafe";
ASSERT_EXIT(vsprintf_helper("0123456789"), testing::KilledBySignal(SIGABRT), "");
}
static int vsnprintf_helper(const char *fmt, ...) {
char buf[10];
va_list va;
int result;
size_t size = atoi("11");
va_start(va, fmt);
result = vsnprintf(buf, size, fmt, va); // should crash here
va_end(va);
return result;
}
TEST(DEATHTEST, vsnprintf_fortified) {
::testing::FLAGS_gtest_death_test_style = "threadsafe";
ASSERT_EXIT(vsnprintf_helper("%s", "0123456789"), testing::KilledBySignal(SIGABRT), "");
}
TEST(DEATHTEST, vsnprintf2_fortified) {
::testing::FLAGS_gtest_death_test_style = "threadsafe";
ASSERT_EXIT(vsnprintf_helper("0123456789"), testing::KilledBySignal(SIGABRT), "");
}
TEST(DEATHTEST, strncat_fortified) {
::testing::FLAGS_gtest_death_test_style = "threadsafe";
char buf[10];
size_t n = atoi("10"); // avoid compiler optimizations
strncpy(buf, "012345678", n);
ASSERT_EXIT(strncat(buf, "9", n), testing::KilledBySignal(SIGABRT), "");
}
TEST(DEATHTEST, strncat2_fortified) {
::testing::FLAGS_gtest_death_test_style = "threadsafe";
char buf[10];
buf[0] = '\0';
size_t n = atoi("10"); // avoid compiler optimizations
ASSERT_EXIT(strncat(buf, "0123456789", n), testing::KilledBySignal(SIGABRT), "");
}
TEST(DEATHTEST, strcat_fortified) {
::testing::FLAGS_gtest_death_test_style = "threadsafe";
char src[11];
strcpy(src, "0123456789");
char buf[10];
buf[0] = '\0';
ASSERT_EXIT(strcat(buf, src), testing::KilledBySignal(SIGABRT), "");
}
TEST(DEATHTEST, memmove_fortified) {
::testing::FLAGS_gtest_death_test_style = "threadsafe";
char buf[20];
strcpy(buf, "0123456789");
size_t n = atoi("10");
ASSERT_EXIT(memmove(buf + 11, buf, n), testing::KilledBySignal(SIGABRT), "");
}
TEST(DEATHTEST, memcpy_fortified) {
::testing::FLAGS_gtest_death_test_style = "threadsafe";
char bufa[10];
char bufb[10];
strcpy(bufa, "012345678");
size_t n = atoi("11");
ASSERT_EXIT(memcpy(bufb, bufa, n), testing::KilledBySignal(SIGABRT), "");
}
TEST(DEATHTEST, strncpy_fortified) {
::testing::FLAGS_gtest_death_test_style = "threadsafe";
char bufa[15];
char bufb[10];
strcpy(bufa, "01234567890123");
size_t n = strlen(bufa);
ASSERT_EXIT(strncpy(bufb, bufa, n), testing::KilledBySignal(SIGABRT), "");
}
TEST(DEATHTEST, strncpy2_fortified) {
::testing::FLAGS_gtest_death_test_style = "threadsafe";
char dest[11];
char src[10];
memcpy(src, "0123456789", sizeof(src)); // src is not null terminated
ASSERT_EXIT(strncpy(dest, src, sizeof(dest)), testing::KilledBySignal(SIGABRT), "");
}
TEST(DEATHTEST, snprintf_fortified) {
::testing::FLAGS_gtest_death_test_style = "threadsafe";
char bufa[15];
char bufb[10];
strcpy(bufa, "0123456789");
size_t n = strlen(bufa) + 1;
ASSERT_EXIT(snprintf(bufb, n, "%s", bufa), testing::KilledBySignal(SIGABRT), "");
}
TEST(DEATHTEST, bzero_fortified) {
::testing::FLAGS_gtest_death_test_style = "threadsafe";
char buf[10];
memcpy(buf, "0123456789", sizeof(buf));
size_t n = atoi("11");
ASSERT_EXIT(bzero(buf, n), testing::KilledBySignal(SIGABRT), "");
}
TEST(DEATHTEST, umask_fortified) {
::testing::FLAGS_gtest_death_test_style = "threadsafe";
mode_t mask = atoi("1023"); // 01777 in octal
ASSERT_EXIT(umask(mask), testing::KilledBySignal(SIGABRT), "");
}
TEST(DEATHTEST, recv_fortified) {
::testing::FLAGS_gtest_death_test_style = "threadsafe";
size_t data_len = atoi("11"); // suppress compiler optimizations
char buf[10];
ASSERT_EXIT(recv(0, buf, data_len, 0), testing::KilledBySignal(SIGABRT), "");
}
TEST(DEATHTEST, FD_ISSET_fortified) {
::testing::FLAGS_gtest_death_test_style = "threadsafe";
fd_set set;
memset(&set, 0, sizeof(set));
ASSERT_EXIT(FD_ISSET(-1, &set), testing::KilledBySignal(SIGABRT), "");
}
TEST(DEATHTEST, FD_ISSET_2_fortified) {
::testing::FLAGS_gtest_death_test_style = "threadsafe";
char buf[1];
fd_set* set = (fd_set*) buf;
ASSERT_EXIT(FD_ISSET(0, set), testing::KilledBySignal(SIGABRT), "");
}
TEST(DEATHTEST, FD_ZERO_fortified) {
::testing::FLAGS_gtest_death_test_style = "threadsafe";
char buf[1];
fd_set* set = (fd_set*) buf;
ASSERT_EXIT(FD_ZERO(set), testing::KilledBySignal(SIGABRT), "");
}
TEST(DEATHTEST, read_fortified) {
::testing::FLAGS_gtest_death_test_style = "threadsafe";
char buf[1];
size_t ct = atoi("2"); // prevent optimizations
int fd = open("/dev/null", O_RDONLY);
ASSERT_EXIT(read(fd, buf, ct), testing::KilledBySignal(SIGABRT), "");
close(fd);
}
extern "C" char* __strncat_chk(char*, const char*, size_t, size_t);
extern "C" char* __strcat_chk(char*, const char*, size_t);
TEST(TEST_NAME, strncat) {
char buf[10];
memset(buf, 'A', sizeof(buf));
buf[0] = 'a';
buf[1] = '\0';
char* res = __strncat_chk(buf, "01234", sizeof(buf) - strlen(buf) - 1, sizeof(buf));
ASSERT_EQ(buf, res);
ASSERT_EQ('a', buf[0]);
ASSERT_EQ('0', buf[1]);
ASSERT_EQ('1', buf[2]);
ASSERT_EQ('2', buf[3]);
ASSERT_EQ('3', buf[4]);
ASSERT_EQ('4', buf[5]);
ASSERT_EQ('\0', buf[6]);
ASSERT_EQ('A', buf[7]);
ASSERT_EQ('A', buf[8]);
ASSERT_EQ('A', buf[9]);
}
TEST(TEST_NAME, strncat2) {
char buf[10];
memset(buf, 'A', sizeof(buf));
buf[0] = 'a';
buf[1] = '\0';
char* res = __strncat_chk(buf, "0123456789", 5, sizeof(buf));
ASSERT_EQ(buf, res);
ASSERT_EQ('a', buf[0]);
ASSERT_EQ('0', buf[1]);
ASSERT_EQ('1', buf[2]);
ASSERT_EQ('2', buf[3]);
ASSERT_EQ('3', buf[4]);
ASSERT_EQ('4', buf[5]);
ASSERT_EQ('\0', buf[6]);
ASSERT_EQ('A', buf[7]);
ASSERT_EQ('A', buf[8]);
ASSERT_EQ('A', buf[9]);
}
TEST(TEST_NAME, strncat3) {
char buf[10];
memset(buf, 'A', sizeof(buf));
buf[0] = '\0';
char* res = __strncat_chk(buf, "0123456789", 5, sizeof(buf));
ASSERT_EQ(buf, res);
ASSERT_EQ('0', buf[0]);
ASSERT_EQ('1', buf[1]);
ASSERT_EQ('2', buf[2]);
ASSERT_EQ('3', buf[3]);
ASSERT_EQ('4', buf[4]);
ASSERT_EQ('\0', buf[5]);
ASSERT_EQ('A', buf[6]);
ASSERT_EQ('A', buf[7]);
ASSERT_EQ('A', buf[8]);
ASSERT_EQ('A', buf[9]);
}
TEST(TEST_NAME, strncat4) {
char buf[10];
memset(buf, 'A', sizeof(buf));
buf[9] = '\0';
char* res = __strncat_chk(buf, "", 5, sizeof(buf));
ASSERT_EQ(buf, res);
ASSERT_EQ('A', buf[0]);
ASSERT_EQ('A', buf[1]);
ASSERT_EQ('A', buf[2]);
ASSERT_EQ('A', buf[3]);
ASSERT_EQ('A', buf[4]);
ASSERT_EQ('A', buf[5]);
ASSERT_EQ('A', buf[6]);
ASSERT_EQ('A', buf[7]);
ASSERT_EQ('A', buf[8]);
ASSERT_EQ('\0', buf[9]);
}
TEST(TEST_NAME, strncat5) {
char buf[10];
memset(buf, 'A', sizeof(buf));
buf[0] = 'a';
buf[1] = '\0';
char* res = __strncat_chk(buf, "01234567", 8, sizeof(buf));
ASSERT_EQ(buf, res);
ASSERT_EQ('a', buf[0]);
ASSERT_EQ('0', buf[1]);
ASSERT_EQ('1', buf[2]);
ASSERT_EQ('2', buf[3]);
ASSERT_EQ('3', buf[4]);
ASSERT_EQ('4', buf[5]);
ASSERT_EQ('5', buf[6]);
ASSERT_EQ('6', buf[7]);
ASSERT_EQ('7', buf[8]);
ASSERT_EQ('\0', buf[9]);
}
TEST(TEST_NAME, strncat6) {
char buf[10];
memset(buf, 'A', sizeof(buf));
buf[0] = 'a';
buf[1] = '\0';
char* res = __strncat_chk(buf, "01234567", 9, sizeof(buf));
ASSERT_EQ(buf, res);
ASSERT_EQ('a', buf[0]);
ASSERT_EQ('0', buf[1]);
ASSERT_EQ('1', buf[2]);
ASSERT_EQ('2', buf[3]);
ASSERT_EQ('3', buf[4]);
ASSERT_EQ('4', buf[5]);
ASSERT_EQ('5', buf[6]);
ASSERT_EQ('6', buf[7]);
ASSERT_EQ('7', buf[8]);
ASSERT_EQ('\0', buf[9]);
}
TEST(TEST_NAME, strcat) {
char buf[10];
memset(buf, 'A', sizeof(buf));
buf[0] = 'a';
buf[1] = '\0';
char* res = __strcat_chk(buf, "01234", sizeof(buf));
ASSERT_EQ(buf, res);
ASSERT_EQ('a', buf[0]);
ASSERT_EQ('0', buf[1]);
ASSERT_EQ('1', buf[2]);
ASSERT_EQ('2', buf[3]);
ASSERT_EQ('3', buf[4]);
ASSERT_EQ('4', buf[5]);
ASSERT_EQ('\0', buf[6]);
ASSERT_EQ('A', buf[7]);
ASSERT_EQ('A', buf[8]);
ASSERT_EQ('A', buf[9]);
}
TEST(TEST_NAME, strcat2) {
char buf[10];
memset(buf, 'A', sizeof(buf));
buf[0] = 'a';
buf[1] = '\0';
char* res = __strcat_chk(buf, "01234567", sizeof(buf));
ASSERT_EQ(buf, res);
ASSERT_EQ('a', buf[0]);
ASSERT_EQ('0', buf[1]);
ASSERT_EQ('1', buf[2]);
ASSERT_EQ('2', buf[3]);
ASSERT_EQ('3', buf[4]);
ASSERT_EQ('4', buf[5]);
ASSERT_EQ('5', buf[6]);
ASSERT_EQ('6', buf[7]);
ASSERT_EQ('7', buf[8]);
ASSERT_EQ('\0', buf[9]);
}
TEST(TEST_NAME, strncpy) {
char src[10];
char dst[10];
memcpy(src, "0123456789", sizeof(src)); // non null terminated string
strncpy(dst, src, sizeof(dst));
ASSERT_EQ('0', dst[0]);
ASSERT_EQ('1', dst[1]);
ASSERT_EQ('2', dst[2]);
ASSERT_EQ('3', dst[3]);
ASSERT_EQ('4', dst[4]);
ASSERT_EQ('5', dst[5]);
ASSERT_EQ('6', dst[6]);
ASSERT_EQ('7', dst[7]);
ASSERT_EQ('8', dst[8]);
ASSERT_EQ('9', dst[9]);
}
TEST(TEST_NAME, strncpy2) {
char src[10];
char dst[15];
memcpy(src, "012345678\0", sizeof(src));
strncpy(dst, src, sizeof(dst));
ASSERT_EQ('0', dst[0]);
ASSERT_EQ('1', dst[1]);
ASSERT_EQ('2', dst[2]);
ASSERT_EQ('3', dst[3]);
ASSERT_EQ('4', dst[4]);
ASSERT_EQ('5', dst[5]);
ASSERT_EQ('6', dst[6]);
ASSERT_EQ('7', dst[7]);
ASSERT_EQ('8', dst[8]);
ASSERT_EQ('\0', dst[9]);
ASSERT_EQ('\0', dst[10]);
ASSERT_EQ('\0', dst[11]);
ASSERT_EQ('\0', dst[12]);
ASSERT_EQ('\0', dst[13]);
ASSERT_EQ('\0', dst[14]);
}
TEST(TEST_NAME, strcat_chk_max_int_size) {
char buf[10];
memset(buf, 'A', sizeof(buf));
buf[0] = 'a';
buf[1] = '\0';
char* res = __strcat_chk(buf, "01234567", (size_t)-1);
ASSERT_EQ(buf, res);
ASSERT_EQ('a', buf[0]);
ASSERT_EQ('0', buf[1]);
ASSERT_EQ('1', buf[2]);
ASSERT_EQ('2', buf[3]);
ASSERT_EQ('3', buf[4]);
ASSERT_EQ('4', buf[5]);
ASSERT_EQ('5', buf[6]);
ASSERT_EQ('6', buf[7]);
ASSERT_EQ('7', buf[8]);
ASSERT_EQ('\0', buf[9]);
}
extern "C" char* __strcpy_chk(char*, const char*, size_t);
TEST(TEST_NAME, strcpy_chk_max_int_size) {
char buf[10];
char* res = __strcpy_chk(buf, "012345678", (size_t)-1);
ASSERT_EQ(buf, res);
ASSERT_EQ('0', buf[0]);
ASSERT_EQ('1', buf[1]);
ASSERT_EQ('2', buf[2]);
ASSERT_EQ('3', buf[3]);
ASSERT_EQ('4', buf[4]);
ASSERT_EQ('5', buf[5]);
ASSERT_EQ('6', buf[6]);
ASSERT_EQ('7', buf[7]);
ASSERT_EQ('8', buf[8]);
ASSERT_EQ('\0', buf[9]);
}
extern "C" void* __memcpy_chk(void*, const void*, size_t, size_t);
TEST(TEST_NAME, memcpy_chk_max_int_size) {
char buf[10];
void* res = __memcpy_chk(buf, "012345678", sizeof(buf), (size_t)-1);
ASSERT_EQ((void*)buf, res);
ASSERT_EQ('0', buf[0]);
ASSERT_EQ('1', buf[1]);
ASSERT_EQ('2', buf[2]);
ASSERT_EQ('3', buf[3]);
ASSERT_EQ('4', buf[4]);
ASSERT_EQ('5', buf[5]);
ASSERT_EQ('6', buf[6]);
ASSERT_EQ('7', buf[7]);
ASSERT_EQ('8', buf[8]);
ASSERT_EQ('\0', buf[9]);
}
// Verify that macro expansion is done properly for sprintf/snprintf (which
// are defined as macros in stdio.h under clang).
#define CONTENTS "macro expansion"
#define BUF_AND_SIZE(A) A, sizeof(A)
#define BUF_AND_CONTENTS(A) A, CONTENTS
#define BUF_AND_SIZE_AND_CONTENTS(A) A, sizeof(A), CONTENTS
TEST(TEST_NAME, s_n_printf_macro_expansion) {
char buf[BUFSIZ];
snprintf(BUF_AND_SIZE(buf), CONTENTS);
EXPECT_STREQ(CONTENTS, buf);
snprintf(BUF_AND_SIZE_AND_CONTENTS(buf));
EXPECT_STREQ(CONTENTS, buf);
sprintf(BUF_AND_CONTENTS(buf));
EXPECT_STREQ(CONTENTS, buf);
}
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