452 lines
13 KiB
C
452 lines
13 KiB
C
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// Test library configuration for gnu.cfg
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//
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// Usage:
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// $ cppcheck --check-library --library=gnu --enable=style,information --inconclusive --error-exitcode=1 --disable=missingInclude --inline-suppr test/cfg/gnu.c
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// =>
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// No warnings about bad library configuration, unmatched suppressions, etc. exitcode=0
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//
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#include <string.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdarg.h>
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#include <netdb.h>
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#include <sys/time.h>
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#include <sys/types.h>
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#include <pwd.h>
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#include <sys/mman.h>
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#include <sys/sem.h>
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#include <wchar.h>
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#if !defined(__CYGWIN__) && !(defined(__APPLE__) && defined(__MACH__))
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#include <sys/epoll.h>
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#endif
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#include <strings.h>
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#ifdef __gnu_linux__
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#include <error.h>
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#endif
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#include <getopt.h>
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#include <netdb.h>
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#ifdef __gnu_linux__
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void unreachableCode_error(void) // #11197
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{
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error(1, 0, ""); // will call exit() if the first parameter is non-zero
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// cppcheck-suppress unusedVariable
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// TODO cppcheck-suppress unreachableCode
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int i;
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}
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#endif
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int nullPointer_gethostbyname2_r(const char* name, int af, struct hostent* ret, char* buf, size_t buflen, struct hostent** result, int* h_errnop)
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{
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// cppcheck-suppress nullPointer
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(void) gethostbyname2_r(NULL, af, ret, buf, buflen, result, h_errnop);
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// cppcheck-suppress nullPointer
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(void) gethostbyname2_r(name, af, NULL, buf, buflen, result, h_errnop);
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// cppcheck-suppress nullPointer
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(void) gethostbyname2_r(name, af, ret, NULL, buflen, result, h_errnop);
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// cppcheck-suppress nullPointer
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(void) gethostbyname2_r(name, af, ret, buf, buflen, NULL, h_errnop);
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// cppcheck-suppress nullPointer
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(void) gethostbyname2_r(name, af, ret, buf, buflen, result, NULL);
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return gethostbyname2_r(name, af, ret, buf, buflen, result, h_errnop);
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}
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int nullPointer_gethostbyname_r(const char* name, struct hostent* ret, char* buf, size_t buflen, struct hostent** result, int* h_errnop)
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{
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// cppcheck-suppress nullPointer
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(void) gethostbyname_r(NULL, ret, buf, buflen, result, h_errnop);
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// cppcheck-suppress nullPointer
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(void) gethostbyname_r(name, NULL, buf, buflen, result, h_errnop);
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// cppcheck-suppress nullPointer
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(void) gethostbyname_r(name, ret, NULL, buflen, result, h_errnop);
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// cppcheck-suppress nullPointer
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(void) gethostbyname_r(name, ret, buf, buflen, NULL, h_errnop);
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// cppcheck-suppress nullPointer
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(void) gethostbyname_r(name, ret, buf, buflen, result, NULL);
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return gethostbyname_r(name, ret, buf, buflen, result, h_errnop);
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}
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int nullPointer_gethostbyaddr_r(const void* addr, socklen_t len, int type, struct hostent* ret, char* buf, size_t buflen, struct hostent** result, int* h_errnop)
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{
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// cppcheck-suppress nullPointer
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(void) gethostbyaddr_r(NULL, len, type, ret, buf, buflen, result, h_errnop);
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// cppcheck-suppress nullPointer
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(void) gethostbyaddr_r(addr, len, type, NULL, buf, buflen, result, h_errnop);
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// cppcheck-suppress nullPointer
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(void) gethostbyaddr_r(addr, len, type, ret, NULL, buflen, result, h_errnop);
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// cppcheck-suppress nullPointer
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(void) gethostbyaddr_r(addr, len, type, ret, buf, buflen, NULL, h_errnop);
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// cppcheck-suppress nullPointer
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(void) gethostbyaddr_r(addr, len, type, ret, buf, buflen, result, NULL);
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return gethostbyaddr_r(addr, len, type, ret, buf, buflen, result, h_errnop);
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}
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int nullPointer_getopt_long(int argc, char **argv, const char *optstring,
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const struct option *longopts, int *longindex)
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{
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// cppcheck-suppress nullPointer
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(void) getopt_long(argc, argv, NULL, longopts, longindex);
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// cppcheck-suppress nullPointer
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(void) getopt_long(argc, argv, optstring, NULL, longindex);
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// cppcheck-suppress nullPointer
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(void) getopt_long(argc, NULL, optstring, longopts, longindex);
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return getopt_long(argc, argv, optstring, longopts, longindex);
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}
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int nullPointer_getopt_long_only(int argc, char* const* argv, const char* optstring,
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const struct option* longopts, int* longindex)
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{
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// cppcheck-suppress nullPointer
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(void) getopt_long_only(argc, NULL, optstring, longopts, longindex);
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// cppcheck-suppress nullPointer
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(void) getopt_long_only(argc, argv, NULL, longopts, longindex);
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// cppcheck-suppress nullPointer
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(void) getopt_long_only(argc, argv, optstring, NULL, longindex);
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return getopt_long_only(argc, argv, optstring, longopts, longindex);
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}
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int nullPointer_getservent_r(struct servent *restrict result_buf, char *restrict buf, size_t buflen, struct servent **restrict result)
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{
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// cppcheck-suppress nullPointer
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(void) getservent_r(NULL, buf, buflen, result);
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// cppcheck-suppress nullPointer
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(void) getservent_r(result_buf, NULL, buflen, result);
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// cppcheck-suppress nullPointer
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(void) getservent_r(result_buf, buf, buflen, NULL);
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return getservent_r(result_buf, buf, buflen, result);
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}
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void *bufferAccessOutOfBounds_memrchr(const void *s, int c, size_t n)
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{
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char buf[42]={0};
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(void)memrchr(buf,c,42);
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// cppcheck-suppress bufferAccessOutOfBounds
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(void)memrchr(buf,c,43);
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return memrchr(s,c,n);
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}
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void knownConditionTrueFalse_ffsl(long i)
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{
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// ffs() returns the position of the first bit set, or 0 if no bits are set in i.
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const int x = ffsl(0);
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// cppcheck-suppress knownConditionTrueFalse
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if (x == 0) {}
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if (ffsl(i) == 0) {}
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}
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void knownConditionTrueFalse_ffsll(long long i)
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{
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// ffs() returns the position of the first bit set, or 0 if no bits are set in i.
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const int x = ffsll(0);
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// cppcheck-suppress knownConditionTrueFalse
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if (x == 0) {}
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if (ffsll(i) == 0) {}
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}
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int nullPointer_semtimedop(int semid, struct sembuf *sops, size_t nsops, const struct timespec *timeout)
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{
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(void) semtimedop(semid, sops, nsops, NULL); // If the timeout argument is NULL, then semtimedop() behaves exactly like semop().
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(void) semtimedop(semid, sops, nsops, timeout);
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// cppcheck-suppress nullPointer
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return semtimedop(semid, NULL, nsops, timeout);
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}
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void *nullPointer_mempcpy(void *dest, const void *src, size_t n)
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{
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// cppcheck-suppress nullPointer
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(void) mempcpy(NULL,src,n);
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// cppcheck-suppress nullPointer
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(void) mempcpy(dest,NULL,n);
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return mempcpy(dest,src,n);
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}
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wchar_t *nullPointer_wmempcpy(wchar_t *dest, const wchar_t *src, size_t n)
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{
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// cppcheck-suppress nullPointer
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(void) wmempcpy(NULL,src,n);
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// cppcheck-suppress nullPointer
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(void) wmempcpy(dest,NULL,n);
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return wmempcpy(dest,src,n);
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}
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int uninitvar_getpw(uid_t uid, char *buf)
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{
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uid_t someUid;
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// cppcheck-suppress getpwCalled
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(void)getpw(uid, buf);
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// cppcheck-suppress getpwCalled
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// cppcheck-suppress uninitvar
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return getpw(someUid, buf);
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}
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// #9323, #9331
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void syntaxError_timercmp(struct timeval t)
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{
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(void)timercmp(&t, &t, <);
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(void)timercmp(&t, &t, <=);
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(void)timercmp(&t, &t, ==);
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(void)timercmp(&t, &t, !=);
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(void)timercmp(&t, &t, >=);
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(void)timercmp(&t, &t, >);
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}
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// False negative: #9346
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void uninitvar_timercmp(struct timeval t)
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{
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struct timeval uninit;
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(void)timercmp(&t, &uninit, <);
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(void)timercmp(&uninit, &t, <=);
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(void)timercmp(&uninit, &uninit, ==);
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}
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void nullPointer_timercmp(struct timeval t)
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{
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struct timeval *p=0;
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// cppcheck-suppress nullPointer
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(void)timercmp(&t, p, <);
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// cppcheck-suppress nullPointer
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(void)timercmp(p, &t, <=);
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// cppcheck-suppress nullPointer
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(void)timercmp(p, p, ==);
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}
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// Declaration necessary because there is no specific / portable header.
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extern void *xcalloc(size_t nmemb, size_t size);
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extern void *xmalloc(size_t size);
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extern void *xrealloc(void *block, size_t newsize);
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extern void xfree(void *ptr);
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void resourceLeak_mkostemps(char *template, int suffixlen, int flags)
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{
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// cppcheck-suppress unreadVariable
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int fp = mkostemps(template, suffixlen, flags);
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// cppcheck-suppress resourceLeak
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}
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void no_resourceLeak_mkostemps_01(char *template, int suffixlen, int flags)
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{
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int fp = mkostemps(template, suffixlen, flags);
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close(fp);
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}
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int no_resourceLeak_mkostemps_02(char *template, int suffixlen, int flags)
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{
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return mkostemps(template, suffixlen, flags);
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}
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void resourceLeak_mkstemps(char *template, int suffixlen)
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{
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// cppcheck-suppress unreadVariable
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int fp = mkstemps(template, suffixlen);
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// cppcheck-suppress resourceLeak
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}
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void no_resourceLeak_mkstemps_01(char *template, int suffixlen)
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{
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int fp = mkstemps(template, suffixlen);
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close(fp);
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}
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int no_resourceLeak_mkstemps_02(char *template, int suffixlen)
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{
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return mkstemps(template, suffixlen);
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}
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void resourceLeak_mkostemp(char *template, int flags)
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{
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// cppcheck-suppress unreadVariable
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int fp = mkostemp(template, flags);
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// cppcheck-suppress resourceLeak
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}
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void no_resourceLeak_mkostemp_01(char *template, int flags)
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{
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int fp = mkostemp(template, flags);
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close(fp);
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}
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int no_resourceLeak_mkostemp_02(char *template, int flags)
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{
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return mkostemp(template, flags);
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}
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void valid_code(int argInt1, va_list valist_arg, int * parg)
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{
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char *p;
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if (__builtin_expect(argInt1, 0)) {}
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if (__builtin_expect_with_probability(argInt1 + 1, 2, 0.5)) {}
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if (__glibc_unlikely(argInt1 != 0)) {}
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if (__glibc_likely(parg != NULL)) {}
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void *ax1 = __builtin_assume_aligned(parg, 16);
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printf("%p", ax1);
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void *ax2 = __builtin_assume_aligned(parg, 32, 8);
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printf("%p", ax2);
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p = (char *)malloc(10);
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free(p);
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p = (char *)malloc(5);
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xfree(p);
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p = (char *)xmalloc(10);
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free(p);
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p = (char *)xmalloc(5);
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xfree(p);
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// cppcheck-suppress allocaCalled
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p = __builtin_alloca(5);
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p[0] = 1;
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// TODO cppcheck-suppress arrayIndexOutOfBounds
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p[5] = 1;
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__builtin_prefetch(p, 0, 1);
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if (__builtin_types_compatible_p(int, char)) {}
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char * pStr = NULL;
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if (vasprintf(&pStr, "%d %d", valist_arg) != -1) {
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free(pStr);
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}
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printf("%d", 0b010);
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printf("%d", __extension__ 0b10001000);
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if (__alignof__(int) == 4) {}
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void * p_mmap = mmap(NULL, 1, PROT_NONE, MAP_ANONYMOUS | MAP_SHARED, -1, 0);
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printf("%p", p_mmap);
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munmap(p_mmap, 1);
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uint16_t i16_1 = 0, i16_2;
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// cppcheck-suppress unreadVariable
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i16_2 = __builtin_bswap16(i16_1++);
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uint32_t i32_1 = 0, i32_2;
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// cppcheck-suppress unreadVariable
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i32_2 = __builtin_bswap32(i32_1++);
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uint64_t i64_1 = 0, i64_2;
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// cppcheck-suppress unreadVariable
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i64_2 = __builtin_bswap64(i64_1++);
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// cppcheck-suppress zerodiv
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// cppcheck-suppress unreadVariable
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i16_1 /= bswap_16(0x1234) - 0x3412;
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// cppcheck-suppress zerodiv
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// cppcheck-suppress unreadVariable
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i32_1 /= bswap_32(0x12345678) - 0x78563412;
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// cppcheck-suppress zerodiv
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// cppcheck-suppress unreadVariable
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i64_1 /= bswap_64(0x023456789abcde0f) - 0x0fdebc9a78563402;
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}
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void ignoreleak(void)
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{
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char *p = (char *)malloc(10);
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__builtin_memset(&(p[0]), 0, 10);
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// cppcheck-suppress memleak
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}
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void memleak_asprintf(char **ptr, const char *fmt, const int arg)
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{
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// No warning is expected for
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if (-1 != asprintf(ptr,fmt,arg)) {
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free(ptr);
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}
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if (-1 != asprintf(ptr,fmt,arg)) {
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// TODO: Related to #8980 cppcheck-suppress memleak
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}
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}
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void memleak_xmalloc()
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{
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char *p = (char*)xmalloc(10);
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p[9] = 0;
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// cppcheck-suppress memleak
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}
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void memleak_mmap()
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{
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void * p_mmap = mmap(NULL, 1, PROT_NONE, MAP_ANONYMOUS | MAP_SHARED, -1, 0);
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printf("%p", p_mmap);
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// cppcheck-suppress memleak
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}
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void uninitvar__builtin_memset(void)
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{
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void *s;
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int c;
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size_t n;
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// cppcheck-suppress uninitvar
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(void)__builtin_memset(s,c,n);
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}
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void bufferAccessOutOfBounds__builtin_memset(void)
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{
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uint8_t buf[42];
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// cppcheck-suppress bufferAccessOutOfBounds
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(void)__builtin_memset(buf,0,1000);
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}
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void bufferAccessOutOfBounds()
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{
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char buf[2] = "a";
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// This is valid
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sethostname(buf, 2);
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// cppcheck-suppress bufferAccessOutOfBounds
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sethostname(buf, 4);
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char * pAlloc1 = xcalloc(2, 4);
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memset(pAlloc1, 0, 8);
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// cppcheck-suppress bufferAccessOutOfBounds
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memset(pAlloc1, 0, 9);
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free(pAlloc1);
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char * pAlloc2 = xmalloc(4);
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memset(pAlloc2, 0, 4);
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// cppcheck-suppress bufferAccessOutOfBounds
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memset(pAlloc2, 0, 5);
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pAlloc2 = xrealloc(pAlloc2, 10);
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memset(pAlloc2, 0, 10);
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// cppcheck-suppress bufferAccessOutOfBounds
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memset(pAlloc2, 0, 11);
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free(pAlloc2);
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}
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void leakReturnValNotUsed()
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{
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// cppcheck-suppress unreadVariable
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char* ptr = (char*)strdupa("test");
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// cppcheck-suppress ignoredReturnValue
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strdupa("test");
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// cppcheck-suppress unreadVariable
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char* ptr2 = (char*)strndupa("test", 1);
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// cppcheck-suppress ignoredReturnValue
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strndupa("test", 1);
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// cppcheck-suppress ignoredReturnValue
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// cppcheck-suppress nullPointer
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strcasestr("test", NULL);
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// FIXME cppcheck-suppress knownConditionTrueFalse
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// cppcheck-suppress duplicateExpression
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if (42 == __builtin_expect(42, 0))
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return;
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}
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#if !defined(__CYGWIN__) && !(defined(__APPLE__) && defined(__MACH__))
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int nullPointer_epoll_ctl(int epfd, int op, int fd, struct epoll_event *event)
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{
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// no warning is expected
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(void)epoll_ctl(epfd, op, fd, event);
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// No nullpointer warning is expected in case op is set to EPOLL_CTL_DEL
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// EPOLL_CTL_DEL
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// Remove (deregister) the target file descriptor fd from the
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// epoll instance referred to by epfd. The event is ignored and
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// can be NULL.
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return epoll_ctl(epfd, EPOLL_CTL_DEL, fd, NULL);
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}
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#endif
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