diff options
| author | delphij <delphij@FreeBSD.org> | 2009-03-28 04:00:46 +0000 |
|---|---|---|
| committer | delphij <delphij@FreeBSD.org> | 2009-03-28 04:00:46 +0000 |
| commit | 38e77f44827a3da21018f0a385572fd4c08d9a45 (patch) | |
| tree | 79143c20fc600108f05874a7856ca9b3575262a2 /lib/libc/db/README | |
| parent | 2f83429b40ea5e9d7042360ddd01d674a50b4306 (diff) | |
| download | FreeBSD-src-38e77f44827a3da21018f0a385572fd4c08d9a45.zip FreeBSD-src-38e77f44827a3da21018f0a385572fd4c08d9a45.tar.gz | |
When allocating memory, zero out them if we don't intend to overwrite them
all; before freeing memory, zero out them before we release it as free
heap. This will eliminate some potential information leak issue.
While there, remove the PURIFY option. There is a slight difference between
the new behavior and the old -DPURIFY behavior, with the latter initializes
memory with 0xff's. The difference between old and new approach does not
generate observable difference.
Obtained from: OpenBSD (partly).
Diffstat (limited to 'lib/libc/db/README')
| -rw-r--r-- | lib/libc/db/README | 8 |
1 files changed, 1 insertions, 7 deletions
diff --git a/lib/libc/db/README b/lib/libc/db/README index bed2c92..1f9ae72 100644 --- a/lib/libc/db/README +++ b/lib/libc/db/README @@ -1,4 +1,5 @@ # @(#)README 8.27 (Berkeley) 9/1/94 +# $FreeBSD$ This is version 1.85 of the Berkeley DB code. @@ -31,10 +32,3 @@ mpool The memory pool routines. recno The fixed/variable length record routines. test Test package. -============================================ -Debugging: - -If you're running a memory checker (e.g. Purify) on DB, make sure that -you recompile it with "-DPURIFY" in the CFLAGS, first. By default, -allocated pages are not initialized by the DB code, and they will show -up as reads of uninitialized memory in the buffer write routines. |
