forked from enlightenment/efl
eina: fix siginfo detection.
Signal are not a portable way to detect memory mapped file corruption. So let's disable it for system without signal and later find a way to detect it on other system.
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5adb2f1ae6
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884c31df41
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@ -327,6 +327,14 @@ AC_SUBST([EINA_SIZEOF_WCHAR_T])
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AC_CHECK_SIZEOF(int, 4)
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AC_CHECK_SIZEOF(int, 4)
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AC_CHECK_SIZEOF(long, 4)
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AC_CHECK_SIZEOF(long, 4)
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AC_CHECK_TYPES([siginfo_t], [], [],
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[[
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#include <signal.h>
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#if HAVE_SIGINFO_H
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# include <siginfo.h>
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#endif
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]])
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#### Checks for structures
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#### Checks for structures
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@ -20,6 +20,8 @@
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# include "config.h"
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# include "config.h"
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#endif
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#endif
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#ifdef HAVE_SIGINFO_T
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#ifdef STDC_HEADERS
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#ifdef STDC_HEADERS
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# include <stdlib.h>
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# include <stdlib.h>
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# include <stddef.h>
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# include <stddef.h>
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@ -41,6 +43,12 @@
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#include <fcntl.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <unistd.h>
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#if HAVE_SIGINFO_H
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# include <siginfo.h>
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#endif
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#endif
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#include "eina_config.h"
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#include "eina_config.h"
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#include "eina_private.h"
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#include "eina_private.h"
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#include "eina_log.h"
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#include "eina_log.h"
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@ -51,6 +59,7 @@
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*============================================================================*/
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*============================================================================*/
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static Eina_Bool mmap_safe = EINA_FALSE;
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static Eina_Bool mmap_safe = EINA_FALSE;
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#ifdef HAVE_SIGINFO_T
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static int _eina_mmap_log_dom = -1;
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static int _eina_mmap_log_dom = -1;
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static int _eina_mmap_zero_fd = -1;
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static int _eina_mmap_zero_fd = -1;
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@ -106,6 +115,7 @@ _eina_mmap_safe_sigbus(int sig EINA_UNUSED,
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/* restore previous errno */
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/* restore previous errno */
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errno = perrno;
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errno = perrno;
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}
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}
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#endif
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/*============================================================================*
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/*============================================================================*
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* API *
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* API *
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@ -114,6 +124,10 @@ _eina_mmap_safe_sigbus(int sig EINA_UNUSED,
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EAPI Eina_Bool
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EAPI Eina_Bool
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eina_mmap_safety_enabled_set(Eina_Bool enabled)
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eina_mmap_safety_enabled_set(Eina_Bool enabled)
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{
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{
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#ifndef HAVE_SIGINFO_T
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(void) enabled;
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return EINA_FALSE;
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#else
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if (_eina_mmap_log_dom < 0)
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if (_eina_mmap_log_dom < 0)
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{
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{
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_eina_mmap_log_dom = eina_log_domain_register("eina_mmap",
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_eina_mmap_log_dom = eina_log_domain_register("eina_mmap",
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@ -155,7 +169,7 @@ eina_mmap_safety_enabled_set(Eina_Bool enabled)
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flags |= FD_CLOEXEC;
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flags |= FD_CLOEXEC;
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fcntl(_eina_mmap_zero_fd, F_SETFD, flags);
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fcntl(_eina_mmap_zero_fd, F_SETFD, flags);
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#endif
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#endif
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}
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}
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/* set up signal handler for SIGBUS */
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/* set up signal handler for SIGBUS */
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sa.sa_sigaction = _eina_mmap_safe_sigbus;
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sa.sa_sigaction = _eina_mmap_safe_sigbus;
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@ -180,6 +194,7 @@ eina_mmap_safety_enabled_set(Eina_Bool enabled)
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done:
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done:
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mmap_safe = enabled;
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mmap_safe = enabled;
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return mmap_safe;
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return mmap_safe;
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#endif
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}
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}
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EAPI Eina_Bool
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EAPI Eina_Bool
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