cppcheck/test/cfg/gnu.c

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// 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>
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#include <stdint.h>
#include <stdio.h>
#ifndef __CYGWIN__
#include <sys/epoll.h>
#endif
void valid_code(int argInt1)
{
if (__builtin_expect(argInt1, 0)) {}
if (__builtin_expect_with_probability(argInt1 + 1, 2, 0.5)) {}
}
void ignoreleak(void)
{
char *p = (char *)malloc(10);
__builtin_memset(&(p[0]), 0, 10);
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// TODO // 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 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);
}
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
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// 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