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bionic/tests/fortify_test.cpp
Nick Kralevich 93501d3ab8 FORTIFY_SOURCE: introduce __strncpy_chk2 
This change detects programs reading beyond the end of "src" when
calling strncpy.

Change-Id: Ie1b42de923385d62552b22c27b2d4713ab77ee03
2013-08-28 12:39:06 -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>
// 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("%d", 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), "");
}
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), "");
}
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]);
}
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