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author | Andreas Jaeger <aj@suse.de> | 2003-11-21 12:24:10 +0100 |
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committer | Andreas Tobler <andreast@gcc.gnu.org> | 2003-11-21 12:24:10 +0100 |
commit | 5196736e471495a372ba5583c53f16020eea10ca (patch) | |
tree | 7adabf51161e3c6039138d3354924de2ffacadcc /libffi/acinclude.m4 | |
parent | 4e074bafe630ebae34af074ae1c8b8d2830ccd3d (diff) | |
download | gcc-5196736e471495a372ba5583c53f16020eea10ca.zip gcc-5196736e471495a372ba5583c53f16020eea10ca.tar.gz gcc-5196736e471495a372ba5583c53f16020eea10ca.tar.bz2 |
acinclude.m4: Add AC_FUNC_MMAP_BLACKLIST.
2003-11-21 Andreas Jaeger <aj@suse.de>
Andreas Tobler <a.tobler@schweiz.ch>
* acinclude.m4: Add AC_FUNC_MMAP_BLACKLIST.
* configure.in: Call AC_FUNC_MMAP_BLACKLIST.
* Makefile.in: Rebuilt.
* aclocal.m4: Likewise.
* configure: Likewise.
* fficonfig.h.in: Likewise.
* testsuite/lib/libffi-dg.exp: Add include dir.
* testsuite/libffi.call/ffitest.h: Add MMAP definitions.
* testsuite/libffi.special/ffitestcxx.h: Likewise.
* testsuite/libffi.call/closure_fn0.c: Use MMAP functionality
for ffi_closure if available.
* testsuite/libffi.call/closure_fn1.c: Likewise.
* testsuite/libffi.call/closure_fn2.c: Likewise.
* testsuite/libffi.call/closure_fn3.c: Likewise.
* testsuite/libffi.call/closure_fn4.c: Likewise.
* testsuite/libffi.call/closure_fn5.c: Likewise.
* testsuite/libffi.call/cls_12byte.c: Likewise.
* testsuite/libffi.call/cls_16byte.c: Likewise.
* testsuite/libffi.call/cls_18byte.c: Likewise.
* testsuite/libffi.call/cls_19byte.c: Likewise.
* testsuite/libffi.call/cls_1_1byte.c: Likewise.
* testsuite/libffi.call/cls_20byte.c: Likewise.
* testsuite/libffi.call/cls_20byte1.c: Likewise.
* testsuite/libffi.call/cls_24byte.c: Likewise.
* testsuite/libffi.call/cls_2byte.c: Likewise.
* testsuite/libffi.call/cls_3_1byte.c: Likewise.
* testsuite/libffi.call/cls_3byte1.c: Likewise.
* testsuite/libffi.call/cls_3byte2.c: Likewise.
* testsuite/libffi.call/cls_4_1byte.c: Likewise.
* testsuite/libffi.call/cls_4byte.c: Likewise.
* testsuite/libffi.call/cls_5byte.c: Likewise.
* testsuite/libffi.call/cls_64byte.c: Likewise.
* testsuite/libffi.call/cls_6byte.c: Likewise.
* testsuite/libffi.call/cls_7byte.c: Likewise.
* testsuite/libffi.call/cls_8byte.c: Likewise.
* testsuite/libffi.call/cls_9byte1.c: Likewise.
* testsuite/libffi.call/cls_9byte2.c: Likewise.
* testsuite/libffi.call/cls_double.c: Likewise.
* testsuite/libffi.call/cls_float.c: Likewise.
* testsuite/libffi.call/cls_schar.c: Likewise.
* testsuite/libffi.call/cls_sint.c: Likewise.
* testsuite/libffi.call/cls_sshort.c: Likewise.
* testsuite/libffi.call/cls_uchar.c: Likewise.
* testsuite/libffi.call/cls_uint.c: Likewise.
* testsuite/libffi.call/cls_ulonglong.c: Likewise.
* testsuite/libffi.call/cls_ushort.c: Likewise.
* testsuite/libffi.call/nested_struct.c: Likewise.
* testsuite/libffi.call/nested_struct1.c: Likewise.
* testsuite/libffi.call/nested_struct2.c: Likewise.
* testsuite/libffi.call/nested_struct3.c: Likewise.
* testsuite/libffi.call/problem1.c: Likewise.
* testsuite/libffi.special/unwindtest.cc: Likewise.
Co-Authored-By: Andreas Tobler <a.tobler@schweiz.ch>
From-SVN: r73800
Diffstat (limited to 'libffi/acinclude.m4')
-rw-r--r-- | libffi/acinclude.m4 | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/libffi/acinclude.m4 b/libffi/acinclude.m4 index 9c2ef36..9089609 100644 --- a/libffi/acinclude.m4 +++ b/libffi/acinclude.m4 @@ -8,4 +8,93 @@ AC_DEFUN([AM_PROG_LIBTOOL],) AC_SUBST(LIBTOOL) ]) +# mmap(2) blacklisting. Some platforms provide the mmap library routine +# but don't support all of the features we need from it. +AC_DEFUN([AC_FUNC_MMAP_BLACKLIST], +[if test $ac_cv_header_sys_mman_h != yes \ + || test $ac_cv_func_mmap != yes; then + ac_cv_func_mmap_file=no + ac_cv_func_mmap_dev_zero=no + ac_cv_func_mmap_anon=no +else + AC_CACHE_CHECK([whether read-only mmap of a plain file works], + ac_cv_func_mmap_file, + [# Add a system to this blacklist if + # mmap(0, stat_size, PROT_READ, MAP_PRIVATE, fd, 0) doesn't return a + # memory area containing the same data that you'd get if you applied + # read() to the same fd. The only system known to have a problem here + # is VMS, where text files have record structure. + case "$host_os" in + vms* | ultrix*) + ac_cv_func_mmap_file=no ;; + *) + ac_cv_func_mmap_file=yes;; + esac]) + AC_CACHE_CHECK([whether mmap from /dev/zero works], + ac_cv_func_mmap_dev_zero, + [# Add a system to this blacklist if it has mmap() but /dev/zero + # does not exist, or if mmapping /dev/zero does not give anonymous + # zeroed pages with both the following properties: + # 1. If you map N consecutive pages in with one call, and then + # unmap any subset of those pages, the pages that were not + # explicitly unmapped remain accessible. + # 2. If you map two adjacent blocks of memory and then unmap them + # both at once, they must both go away. + # Systems known to be in this category are Windows (all variants), + # VMS, and Darwin. + case "$host_os" in + vms* | cygwin* | pe | mingw* | darwin* | ultrix* | hpux10* | hpux11.00) + ac_cv_func_mmap_dev_zero=no ;; + *) + ac_cv_func_mmap_dev_zero=yes;; + esac]) + + # Unlike /dev/zero, the MAP_ANON(YMOUS) defines can be probed for. + AC_CACHE_CHECK([for MAP_ANON(YMOUS)], ac_cv_decl_map_anon, + [AC_TRY_COMPILE( +[#include <sys/types.h> +#include <sys/mman.h> +#include <unistd.h> + +#ifndef MAP_ANONYMOUS +#define MAP_ANONYMOUS MAP_ANON +#endif +], +[int n = MAP_ANONYMOUS;], + ac_cv_decl_map_anon=yes, + ac_cv_decl_map_anon=no)]) + + if test $ac_cv_decl_map_anon = no; then + ac_cv_func_mmap_anon=no + else + AC_CACHE_CHECK([whether mmap with MAP_ANON(YMOUS) works], + ac_cv_func_mmap_anon, + [# Add a system to this blacklist if it has mmap() and MAP_ANON or + # MAP_ANONYMOUS, but using mmap(..., MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) + # doesn't give anonymous zeroed pages with the same properties listed + # above for use of /dev/zero. + # Systems known to be in this category are Windows, VMS, and SCO Unix. + case "$host_os" in + vms* | cygwin* | pe | mingw* | sco* | udk* ) + ac_cv_func_mmap_anon=no ;; + *) + ac_cv_func_mmap_anon=yes;; + esac]) + fi +fi + +if test $ac_cv_func_mmap_file = yes; then + AC_DEFINE(HAVE_MMAP_FILE, 1, + [Define if read-only mmap of a plain file works.]) +fi +if test $ac_cv_func_mmap_dev_zero = yes; then + AC_DEFINE(HAVE_MMAP_DEV_ZERO, 1, + [Define if mmap of /dev/zero works.]) +fi +if test $ac_cv_func_mmap_anon = yes; then + AC_DEFINE(HAVE_MMAP_ANON, 1, + [Define if mmap with MAP_ANON(YMOUS) works.]) +fi +]) + sinclude(../config/accross.m4) |