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Cleanup some ancient Ultrix / Alpha code in main() that is intended to

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modify how unaligned memory accesses are dealt with. Document that this
is really what is going on, and merge the NOFIXADE and NOPRINTADE code
paths.
This commit is contained in:
Neil Conway
2004-09-24 06:29:07 +00:00
parent 3331180bb4
commit ae72283816
1 changed files with 13 additions and 8 deletions
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21
src/backend/main/main.c
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@ -13,7 +13,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/main/main.c,v 1.89 2004/08/29 05:06:43 momjian Exp $
* $PostgreSQL: pgsql/src/backend/main/main.c,v 1.90 2004/09/24 06:29:07 neilc Exp $
*
*-------------------------------------------------------------------------
*/
@ -71,18 +71,23 @@ main(int argc, char *argv[])
#if defined(__alpha) /* no __alpha__ ? */
#ifdef NOFIXADE
int buffer[] = {SSIN_UACPROC, UAC_SIGBUS};
#endif /* NOFIXADE */
#ifdef NOPRINTADE
int buffer[] = {SSIN_UACPROC, UAC_NOPRINT};
#endif /* NOPRINTADE */
int buffer[] = {SSIN_UACPROC, UAC_SIGBUS | UAC_NOPRINT};
#endif
#endif /* __alpha */
#ifdef WIN32
char *env_locale;
#endif
#if defined(NOFIXADE) || defined(NOPRINTADE)
/*
* On some platforms, unaligned memory accesses result in a kernel
* trap; the default kernel behavior is to emulate the memory
* access, but this results in a significant performance
* penalty. We ought to fix PG not to make such unaligned memory
* accesses, so this code disables the kernel emulation: unaligned
* accesses will result in SIGBUS instead.
*/
#ifdef NOFIXADE
#if defined(ultrix4)
syscall(SYS_sysmips, MIPS_FIXADE, 0, NULL, NULL, NULL);
@ -94,7 +99,7 @@ main(int argc, char *argv[])
write_stderr("%s: setsysinfo failed: %s\n",
argv[0], strerror(errno));
#endif
#endif /* NOFIXADE || NOPRINTADE */
#endif /* NOFIXADE */
#if defined(WIN32)
{