Attachment 1027042 Details for Bug 1211871 – Upstream patch for the 4.7.25 version

[patch] Upstream patch for the 4.7.25 version

memp_stat_4.7.25.diff (text/plain), 5.25 KB, created by Jan Staněk on 2015-05-19 09:01:20 UTC

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Creator: Jan Staněk

Created: 2015-05-19 09:01:20 UTC

Size: 5.25 KB

patch

obsolete

>Only in db-4.7.25_orig/build_unix: tags
>Only in db-4.7.25: memp_stat_4.7.25.diff
>diff -u -r db-4.7.25_orig/mp/mp_stat.c db-4.7.25/mp/mp_stat.c
>--- db-4.7.25_orig/mp/mp_stat.c	2008-01-09 04:58:42.000000000 +0800
>+++ db-4.7.25/mp/mp_stat.c	2015-05-18 17:07:39.000000000 +0800
>@@ -88,6 +88,13 @@
> 	u_int32_t tmp_wait, tmp_nowait;
> 	int ret;
> 
>+	/*
>+	 * The array holding the lengths related to the buffer allocated for *fspp.
>+	 * The first element of the array holds the number of entries allocated.
>+	 * The second element of the array holds the total number of bytes allocated.
>+	 */
>+	u_int32_t fsp_len[2];
>+
> 	dbmp = env->mp_handle;
> 	mp = dbmp->reginfo[0].primary;
> 
>@@ -200,31 +207,53 @@
> 	if (fspp != NULL) {
> 		*fspp = NULL;
> 
>-		/* Count the MPOOLFILE structures. */
>-		i = 0;
>-		len = 0;
>-		if ((ret = __memp_walk_files(env,
>-		     mp, __memp_count_files, &len, &i, flags)) != 0)
>-			return (ret);
>+		while (*fspp == NULL) {
>+			/* Count the MPOOLFILE structures. */
>+			i = 0;
>+			/*
>+			 * Allow space for the first __memp_get_files() to align the
>+			 * structure array to uintmax_t, DB_MPOOL_STAT's most
>+			 * restrictive field.  [#23150]
>+			 */
>+			len = sizeof(uintmax_t);
>+			if ((ret = __memp_walk_files(env,
>+			     mp, __memp_count_files, &len, &i, flags)) != 0)
>+				return (ret);
>+
>+			if (i == 0)
>+				return (0);
>+
>+			/* 
>+			 * Copy the number of DB_MPOOL_FSTAT entries and the number of
>+			 * bytes allocated for them into fsp_len. Do not count the space
>+			 * reserved for allignment.
>+			 */
>+			fsp_len[0] = i;
>+			fsp_len[1] = len - sizeof(uintmax_t);
> 
>-		if (i == 0)
>-			return (0);
>-		len += sizeof(DB_MPOOL_FSTAT *);	/* Trailing NULL */
>+			len += sizeof(DB_MPOOL_FSTAT *);	/* Trailing NULL */
> 
>-		/* Allocate space */
>-		if ((ret = __os_umalloc(env, len, fspp)) != 0)
>-			return (ret);
>+			/* Allocate space */
>+			if ((ret = __os_umalloc(env, len, fspp)) != 0)
>+				return (ret);
> 
>-		tfsp = *fspp;
>-		*tfsp = NULL;
>+			tfsp = *fspp;
>+			*tfsp = NULL;
> 
>-		/*
>-		 * Files may have been opened since we counted, don't walk
>-		 * off the end of the allocated space.
>-		 */
>-		if ((ret = __memp_walk_files(env,
>-		    mp, __memp_get_files, &tfsp, &i, flags)) != 0)
>-			return (ret);
>+			/*
>+			 * Files may have been opened since we counted, if we walk off
>+			 * the end of the allocated space specified in fsp_len, retry.
>+			 */
>+			if ((ret = __memp_walk_files(env,
>+			    mp, __memp_get_files, &tfsp, fsp_len, flags)) != 0) {
>+				if (ret == DB_BUFFER_SMALL) {
>+					__os_ufree(env, *fspp);
>+					*fspp = NULL;
>+					tfsp = NULL;
>+				} else
>+					return (ret);
>+			}
>+		}
> 
> 		*++tfsp = NULL;
> 	}
>@@ -296,29 +325,36 @@
>  * for the text file names.
>  */
> static int
>-__memp_get_files(env, mfp, argp, countp, flags)
>+__memp_get_files(env, mfp, argp, fsp_len, flags)
> 	ENV *env;
> 	MPOOLFILE *mfp;
> 	void *argp;
>-	u_int32_t *countp;
>+	u_int32_t fsp_len[];
> 	u_int32_t flags;
> {
> 	DB_MPOOL *dbmp;
> 	DB_MPOOL_FSTAT **tfsp, *tstruct;
> 	char *name, *tname;
>-	size_t nlen;
>+	size_t nlen, tlen;
> 	u_int32_t pagesize;
> 
>-	if (*countp == 0)
>-		return (0);
>+	/* We walked through more files than argp was allocated for. */
>+	if (fsp_len[0] == 0)
>+		return DB_BUFFER_SMALL;
> 
> 	dbmp = env->mp_handle;
> 	tfsp = *(DB_MPOOL_FSTAT ***)argp;
> 
> 	if (*tfsp == NULL) {
>-		/* Add 1 to count because we need to skip over the NULL. */
>-		tstruct = (DB_MPOOL_FSTAT *)(tfsp + *countp + 1);
>-		tname = (char *)(tstruct + *countp);
>+		/*
>+		 * Add 1 to count because to skip over the NULL end marker.
>+		 * Align it further for DB_MPOOL_STAT's most restrictive field
>+		 * because uintmax_t might require stricter alignment than
>+		 * pointers; e.g., IP32 LL64 SPARC. [#23150]
>+		 */
>+		tstruct = (DB_MPOOL_FSTAT *)&tfsp[fsp_len[0] + 1];
>+		tstruct = ALIGNP_INC(tstruct, sizeof(uintmax_t));
>+		tname = (char *)&tstruct[fsp_len[0]];
> 		*tfsp = tstruct;
> 	} else {
> 		tstruct = *tfsp + 1;
>@@ -328,12 +364,26 @@
> 
> 	name = __memp_fns(dbmp, mfp);
> 	nlen = strlen(name) + 1;
>+
>+	/* The space required for file names is larger than argp was allocated for. */
>+	tlen = sizeof(DB_MPOOL_FSTAT *) + sizeof(DB_MPOOL_FSTAT) + nlen;
>+	if (fsp_len[1] < tlen)
>+		return DB_BUFFER_SMALL;
>+	else
>+		/* Count down the number of bytes left in argp. */
>+		fsp_len[1] -= tlen;
>+
> 	memcpy(tname, name, nlen);
>-	*tstruct = mfp->stat;
>+	memcpy(tstruct, &mfp->stat, sizeof(mfp->stat));
> 	tstruct->file_name = tname;
> 
>+	/* Grab the pagesize from the mfp. */
>+	tstruct->st_pagesize = mfp->stat.st_pagesize;
>+
> 	*(DB_MPOOL_FSTAT ***)argp = tfsp;
>-	(*countp)--;
>+
>+	/* Count down the number of entries left in argp. */
>+	fsp_len[0]--;
> 
> 	if (LF_ISSET(DB_STAT_CLEAR)) {
> 		pagesize = mfp->stat.st_pagesize;
>diff -u -r db-4.7.25_orig/mp/mp_sync.c db-4.7.25/mp/mp_sync.c
>--- db-4.7.25_orig/mp/mp_sync.c	2008-01-17 21:59:12.000000000 +0800
>+++ db-4.7.25/mp/mp_sync.c	2015-05-18 17:04:00.000000000 +0800
>@@ -57,11 +57,13 @@
> 			if ((t_ret = func(env,
> 			    mfp, arg, countp, flags)) != 0 && ret == 0)
> 				ret = t_ret;
>-			if (ret != 0 && !LF_ISSET(DB_STAT_MEMP_NOERROR))
>+			if (ret != 0 &&
>+			    (!LF_ISSET(DB_STAT_MEMP_NOERROR) || ret == DB_BUFFER_SMALL))
> 				break;
> 		}
> 		MUTEX_UNLOCK(env, hp->mtx_hash);
>-		if (ret != 0 && !LF_ISSET(DB_STAT_MEMP_NOERROR))
>+		if (ret != 0 &&
>+		    (!LF_ISSET(DB_STAT_MEMP_NOERROR) || ret == DB_BUFFER_SMALL))
> 			break;
> 	}
> 	return (ret);

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Attachments on bug 1211871: 1026575 | 1027041 | 1027042