cppcheck/test/cfg/gnu.c

299 lines
7.5 KiB
C

// Test library configuration for gnu.cfg
//
// Usage:
// $ cppcheck --check-library --library=gnu --enable=information --enable=style --error-exitcode=1 --suppress=missingIncludeSystem --inline-suppr test/cfg/gnu.c
// =>
// No warnings about bad library configuration, unmatched suppressions, etc. exitcode=0
//
#include <string.h>
#include <stdlib.h>
#include <stdint.h>
#include <stdio.h>
#include <stdarg.h>
#include <sys/time.h>
#include <sys/types.h>
#include <pwd.h>
#include <sys/mman.h>
#ifndef __CYGWIN__
#include <sys/epoll.h>
#endif
int uninitvar_getpw(uid_t uid, char *buf)
{
uid_t someUid;
// cppcheck-suppress getpwCalled
(void)getpw(uid, buf);
// cppcheck-suppress getpwCalled
// cppcheck-suppress uninitvar
return getpw(someUid, buf);
}
// #9323, #9331
void syntaxError_timercmp(struct timeval t)
{
(void)timercmp(&t, &t, <);
(void)timercmp(&t, &t, <=);
(void)timercmp(&t, &t, ==);
(void)timercmp(&t, &t, !=);
(void)timercmp(&t, &t, >=);
(void)timercmp(&t, &t, >);
}
// False negative: #9346
void uninitvar_timercmp(struct timeval t)
{
struct timeval uninit;
(void)timercmp(&t, &uninit, <);
(void)timercmp(&uninit, &t, <=);
(void)timercmp(&uninit, &uninit, ==);
}
void nullPointer_timercmp(struct timeval t)
{
struct timeval *p=0;
// cppcheck-suppress nullPointer
(void)timercmp(&t, p, <);
// cppcheck-suppress nullPointer
(void)timercmp(p, &t, <=);
// cppcheck-suppress nullPointer
(void)timercmp(p, p, ==);
}
// Declaration necessary because there is no specific / portable header.
extern void *xcalloc(size_t nmemb, size_t size);
extern void *xmalloc(size_t size);
extern void *xrealloc(void *block, size_t newsize);
extern void xfree(void *ptr);
void resourceLeak_mkostemps(char *template, int suffixlen, int flags)
{
// cppcheck-suppress unreadVariable
int fp = mkostemps(template, suffixlen, flags);
// cppcheck-suppress resourceLeak
}
void no_resourceLeak_mkostemps_01(char *template, int suffixlen, int flags)
{
int fp = mkostemps(template, suffixlen, flags);
close(fp);
}
int no_resourceLeak_mkostemps_02(char *template, int suffixlen, int flags)
{
return mkostemps(template, suffixlen, flags);
}
void resourceLeak_mkstemps(char *template, int suffixlen)
{
// cppcheck-suppress unreadVariable
int fp = mkstemps(template, suffixlen);
// cppcheck-suppress resourceLeak
}
void no_resourceLeak_mkstemps_01(char *template, int suffixlen)
{
int fp = mkstemps(template, suffixlen);
close(fp);
}
int no_resourceLeak_mkstemps_02(char *template, int suffixlen)
{
return mkstemps(template, suffixlen);
}
void resourceLeak_mkostemp(char *template, int flags)
{
// cppcheck-suppress unreadVariable
int fp = mkostemp(template, flags);
// cppcheck-suppress resourceLeak
}
void no_resourceLeak_mkostemp_01(char *template, int flags)
{
int fp = mkostemp(template, flags);
close(fp);
}
int no_resourceLeak_mkostemp_02(char *template, int flags)
{
return mkostemp(template, flags);
}
void valid_code(int argInt1, va_list valist_arg, int * parg)
{
char *p;
if (__builtin_expect(argInt1, 0)) {}
if (__builtin_expect_with_probability(argInt1 + 1, 2, 0.5)) {}
if (__glibc_unlikely(argInt1 != 0)) {}
if (__glibc_likely(parg != NULL)) {}
void *ax1 = __builtin_assume_aligned(parg, 16);
printf("%p", ax1);
void *ax2 = __builtin_assume_aligned(parg, 32, 8);
printf("%p", ax2);
p = (char *)malloc(10);
free(p);
p = (char *)malloc(5);
xfree(p);
p = (char *)xmalloc(10);
free(p);
p = (char *)xmalloc(5);
xfree(p);
// cppcheck-suppress allocaCalled
p = __builtin_alloca(5);
p[0] = 1;
// TODO cppcheck-suppress arrayIndexOutOfBounds
p[5] = 1;
__builtin_prefetch(p, 0, 1);
if (__builtin_types_compatible_p(int, char)) {}
char * pStr = NULL;
if (vasprintf(&pStr, "%d %d", valist_arg) != -1) {
free(pStr);
}
printf("%d", 0b010);
printf("%d", __extension__ 0b10001000);
if (__alignof__(int) == 4) {}
void * p_mmap = mmap(NULL, 1, PROT_NONE, MAP_ANONYMOUS | MAP_SHARED, -1, 0);
printf("%p", p_mmap);
munmap(p_mmap, 1);
uint16_t i16_1 = 0, i16_2;
// cppcheck-suppress unreadVariable
i16_2 = __builtin_bswap16(i16_1++);
uint32_t i32_1 = 0, i32_2;
// cppcheck-suppress unreadVariable
i32_2 = __builtin_bswap32(i32_1++);
uint64_t i64_1 = 0, i64_2;
// cppcheck-suppress unreadVariable
i64_2 = __builtin_bswap64(i64_1++);
// cppcheck-suppress zerodiv
// cppcheck-suppress unreadVariable
i16_1 /= bswap_16(0x1234) - 0x3412;
// cppcheck-suppress zerodiv
// cppcheck-suppress unreadVariable
i32_1 /= bswap_32(0x12345678) - 0x78563412;
// cppcheck-suppress zerodiv
// cppcheck-suppress unreadVariable
i64_1 /= bswap_64(0x023456789abcde0f) - 0x0fdebc9a78563402;
}
void ignoreleak(void)
{
char *p = (char *)malloc(10);
__builtin_memset(&(p[0]), 0, 10);
// cppcheck-suppress memleak
}
void memleak_asprintf(char **ptr, const char *fmt, const int arg)
{
// No warning is expected for
if (-1 != asprintf(ptr,fmt,arg)) {
free(ptr);
}
if (-1 != asprintf(ptr,fmt,arg)) {
// TODO: Related to #8980 cppcheck-suppress memleak
}
}
void memleak_xmalloc()
{
char *p = (char*)xmalloc(10);
p[9] = 0;
// cppcheck-suppress memleak
}
void memleak_mmap()
{
void * p_mmap = mmap(NULL, 1, PROT_NONE, MAP_ANONYMOUS | MAP_SHARED, -1, 0);
printf("%p", p_mmap);
// cppcheck-suppress memleak
}
void uninitvar__builtin_memset(void)
{
void *s;
int c;
size_t n;
// cppcheck-suppress uninitvar
(void)__builtin_memset(s,c,n);
}
void bufferAccessOutOfBounds__builtin_memset(void)
{
uint8_t buf[42];
// cppcheck-suppress bufferAccessOutOfBounds
(void)__builtin_memset(buf,0,1000);
}
void bufferAccessOutOfBounds()
{
char buf[2] = "a";
// This is valid
sethostname(buf, 2);
// cppcheck-suppress bufferAccessOutOfBounds
sethostname(buf, 4);
char * pAlloc1 = xcalloc(2, 4);
memset(pAlloc1, 0, 8);
// cppcheck-suppress bufferAccessOutOfBounds
memset(pAlloc1, 0, 9);
free(pAlloc1);
char * pAlloc2 = xmalloc(4);
memset(pAlloc2, 0, 4);
// cppcheck-suppress bufferAccessOutOfBounds
memset(pAlloc2, 0, 5);
pAlloc2 = xrealloc(pAlloc2, 10);
memset(pAlloc2, 0, 10);
// cppcheck-suppress bufferAccessOutOfBounds
memset(pAlloc2, 0, 11);
free(pAlloc2);
}
void leakReturnValNotUsed()
{
// cppcheck-suppress unreadVariable
char* ptr = (char*)strdupa("test");
// cppcheck-suppress ignoredReturnValue
strdupa("test");
// cppcheck-suppress unreadVariable
char* ptr2 = (char*)strndupa("test", 1);
// cppcheck-suppress ignoredReturnValue
strndupa("test", 1);
// cppcheck-suppress ignoredReturnValue
// cppcheck-suppress nullPointer
strcasestr("test", NULL);
// FIXME cppcheck-suppress knownConditionTrueFalse
// cppcheck-suppress duplicateExpression
if (42 == __builtin_expect(42, 0))
return;
}
#ifndef __CYGWIN__
int nullPointer_epoll_ctl(int epfd, int op, int fd, struct epoll_event *event)
{
// no warning is expected
(void)epoll_ctl(epfd, op, fd, event);
// No nullpointer warning is expected in case op is set to EPOLL_CTL_DEL
// EPOLL_CTL_DEL
// Remove (deregister) the target file descriptor fd from the
// epoll instance referred to by epfd. The event is ignored and
// can be NULL.
return epoll_ctl(epfd, EPOLL_CTL_DEL, fd, NULL);
}
#endif