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4775578486
This adds a test to ensure that the problems fixed in the last several patches do not recur. Each directory checks the headers that it installs for two properties: first, each header must be compilable in isolation, as both C and C++, under a representative combination of language and library conformance levels; second, there is a blacklist of identifiers that may not appear in any installed header, currently consisting of the legacy BSD typedefs. (There is an exemption for the headers that define those typedefs, and for the RPC headers. It may be necessary to make this more sophisticated if we add more stuff to the blacklist in the future.) In order for this test to work correctly, every wrapper header that actually defines something must guard those definitions with #ifndef _ISOMAC. This is the existing mechanism used by the conform/ tests to tell wrapper headers not to define anything that the public header wouldn't, and not to use anything from libc-symbols.h. conform/ only cares for headers that we need to check for standards conformance, whereas this test applies to *every* header. (Headers in include/ that are either installed directly, or are internal-use-only and do *not* correspond to any installed header, are not affected.) * scripts/check-installed-headers.sh: New script. * Rules: In each directory that defines header files to be installed, run check-installed-headers.sh on them as a special test. * Makefile: Likewise for the headers installed at top level. * include/aliases.h, include/alloca.h, include/argz.h * include/arpa/nameser.h, include/arpa/nameser_compat.h * include/elf.h, include/envz.h, include/err.h * include/execinfo.h, include/fpu_control.h, include/getopt.h * include/gshadow.h, include/ifaddrs.h, include/libintl.h * include/link.h, include/malloc.h, include/mcheck.h * include/mntent.h, include/netinet/ether.h * include/nss.h, include/obstack.h, include/printf.h * include/pty.h, include/resolv.h, include/rpc/auth.h * include/rpc/auth_des.h, include/rpc/auth_unix.h * include/rpc/clnt.h, include/rpc/des_crypt.h * include/rpc/key_prot.h, include/rpc/netdb.h * include/rpc/pmap_clnt.h, include/rpc/pmap_prot.h * include/rpc/pmap_rmt.h, include/rpc/rpc.h * include/rpc/rpc_msg.h, include/rpc/svc.h * include/rpc/svc_auth.h, include/rpc/xdr.h * include/rpcsvc/nis_callback.h, include/rpcsvc/nislib.h * include/rpcsvc/yp.h, include/rpcsvc/ypclnt.h * include/rpcsvc/ypupd.h, include/shadow.h * include/stdio_ext.h, include/sys/epoll.h * include/sys/file.h, include/sys/gmon.h, include/sys/ioctl.h * include/sys/prctl.h, include/sys/profil.h * include/sys/statfs.h, include/sys/sysctl.h * include/sys/sysinfo.h, include/ttyent.h, include/utmp.h * sysdeps/arm/nacl/include/bits/setjmp.h * sysdeps/mips/include/sys/asm.h * sysdeps/unix/sysv/linux/include/sys/sysinfo.h * sysdeps/unix/sysv/linux/include/sys/timex.h * sysdeps/x86/fpu/include/bits/fenv.h: Add #ifndef _ISOMAC guard around internal declarations. Add multiple-inclusion guard if not already present.
81 lines
2.3 KiB
C
81 lines
2.3 KiB
C
#ifndef _ALLOCA_H
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#include <stdlib/alloca.h>
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# ifndef _ISOMAC
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#include <stackinfo.h>
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#undef __alloca
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/* Now define the internal interfaces. */
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extern void *__alloca (size_t __size);
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#ifdef __GNUC__
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# define __alloca(size) __builtin_alloca (size)
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#endif /* GCC. */
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extern int __libc_use_alloca (size_t size) __attribute__ ((const));
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extern int __libc_alloca_cutoff (size_t size) __attribute__ ((const));
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libc_hidden_proto (__libc_alloca_cutoff)
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#define __MAX_ALLOCA_CUTOFF 65536
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#include <allocalim.h>
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#ifndef stackinfo_alloca_round
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# define stackinfo_alloca_round(l) (((l) + 15) & -16)
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#endif
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#if _STACK_GROWS_DOWN
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# define extend_alloca(buf, len, newlen) \
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(__typeof (buf)) ({ size_t __newlen = stackinfo_alloca_round (newlen); \
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char *__newbuf = __alloca (__newlen); \
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if (__newbuf + __newlen == (char *) (buf)) \
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len += __newlen; \
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else \
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len = __newlen; \
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__newbuf; })
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#elif _STACK_GROWS_UP
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# define extend_alloca(buf, len, newlen) \
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(__typeof (buf)) ({ size_t __newlen = stackinfo_alloca_round (newlen); \
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char *__newbuf = __alloca (__newlen); \
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char *__buf = (char *) (buf); \
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if (__buf + len == __newbuf) \
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{ \
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len += __newlen; \
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__newbuf = __buf; \
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} \
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else \
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len = __newlen; \
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__newbuf; })
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#else
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# define extend_alloca(buf, len, newlen) \
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__alloca (((len) = (newlen)))
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#endif
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#if defined stackinfo_get_sp && defined stackinfo_sub_sp
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# define alloca_account(size, avar) \
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({ void *old__ = stackinfo_get_sp (); \
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void *m__ = __alloca (size); \
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avar += stackinfo_sub_sp (old__); \
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m__; })
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# define extend_alloca_account(buf, len, newlen, avar) \
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({ void *old__ = stackinfo_get_sp (); \
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void *m__ = extend_alloca (buf, len, newlen); \
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avar += stackinfo_sub_sp (old__); \
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m__; })
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#else
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# define alloca_account(size, avar) \
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({ size_t s__ = (size); \
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avar += s__; \
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__alloca (s__); })
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# define extend_alloca_account(buf, len, newlen, avar) \
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({ size_t s__ = (newlen); \
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avar += s__; \
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extend_alloca (buf, len, s__); })
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#endif
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# endif /* !_ISOMAC */
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#endif
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