fi
-for ac_header in atomic.h copyfile.h crypt.h fp_class.h getopt.h ieeefp.h ifaddrs.h langinfo.h mbarrier.h poll.h sys/epoll.h sys/ipc.h sys/prctl.h sys/procctl.h sys/pstat.h sys/resource.h sys/select.h sys/sem.h sys/shm.h sys/sockio.h sys/tas.h sys/un.h termios.h ucred.h utime.h wchar.h wctype.h
+for ac_header in atomic.h copyfile.h crypt.h fp_class.h getopt.h ieeefp.h ifaddrs.h langinfo.h mbarrier.h poll.h sys/epoll.h sys/ipc.h sys/personality.h sys/prctl.h sys/procctl.h sys/pstat.h sys/resource.h sys/select.h sys/sem.h sys/shm.h sys/sockio.h sys/tas.h sys/un.h termios.h ucred.h utime.h wchar.h wctype.h
do :
as_ac_Header=`$as_echo "ac_cv_header_$ac_header" | $as_tr_sh`
ac_fn_c_check_header_mongrel "$LINENO" "$ac_header" "$as_ac_Header" "$ac_includes_default"
#include <sys/wait.h>
#include <unistd.h>
+#ifdef EXEC_BACKEND
+#if defined(HAVE_SYS_PERSONALITY_H)
+#include <sys/personality.h>
+#elif defined(HAVE_SYS_PROCCTL_H)
+#include <sys/procctl.h>
+#endif
+#endif
+
/* Inhibit mingw CRT's auto-globbing of command line arguments */
#if defined(WIN32) && !defined(_MSC_VER)
extern int _CRT_glob = 0; /* 0 turns off globbing; 1 turns it on */
}
}
+#ifdef EXEC_BACKEND
+/*
+ * For the benefit of PostgreSQL developers testing EXEC_BACKEND on Unix
+ * systems (code paths normally exercised only on Windows), provide a way to
+ * disable address space layout randomization, if we know how on this platform.
+ * Otherwise, backends may fail to attach to shared memory at the fixed address
+ * chosen by the postmaster. (See also the macOS-specific hack in
+ * sysv_shmem.c.)
+ */
+int
+pg_disable_aslr(void)
+{
+#if defined(HAVE_SYS_PERSONALITY_H)
+ return personality(ADDR_NO_RANDOMIZE);
+#elif defined(HAVE_SYS_PROCCTL_H) && defined(PROC_ASLR_FORCE_DISABLE)
+ int data = PROC_ASLR_FORCE_DISABLE;
+
+ return procctl(P_PID, 0, PROC_ASLR_CTL, &data);
+#else
+ errno = ENOSYS;
+ return -1;
+#endif
+}
+#endif
+
#ifdef WIN32
/*
/* Define to 1 if you have the <sys/ipc.h> header file. */
#undef HAVE_SYS_IPC_H
+/* Define to 1 if you have the <sys/personality.h> header file. */
+#undef HAVE_SYS_PERSONALITY_H
+
/* Define to 1 if you have the <sys/prctl.h> header file. */
#undef HAVE_SYS_PRCTL_H
/* Doesn't belong here, but this is used with find_other_exec(), so... */
#define PG_BACKEND_VERSIONSTR "postgres (PostgreSQL) " PG_VERSION "\n"
+#ifdef EXEC_BACKEND
+/* Disable ASLR before exec, for developer builds only (in exec.c) */
+extern int pg_disable_aslr(void);
+#endif
+
#if defined(WIN32) || defined(__CYGWIN__)
#define EXE ".exe"