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Add FAQ entry on how to get rid of Valgrind warnings.

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PR: 521
This commit is contained in:
Lutz Jänicke 2007-09-20 07:39:15 +00:00
parent 2e3fd54337
commit 9ce3ee47ba
1 changed files with 15 additions and 0 deletions
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15
FAQ
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@ -66,6 +66,7 @@ OpenSSL - Frequently Asked Questions
* Why doesn't my server application receive a client certificate? * Why doesn't my server application receive a client certificate?
* Why does compilation fail due to an undefined symbol NID_uniqueIdentifier? * Why does compilation fail due to an undefined symbol NID_uniqueIdentifier?
* I think I've detected a memory leak, is this a bug? * I think I've detected a memory leak, is this a bug?
* Why does Valgrind complain about the use of uninitialized data?
=============================================================================== ===============================================================================
@ -894,5 +895,19 @@ thread-safe):
ERR_free_strings(), EVP_cleanup() and CRYPTO_cleanup_all_ex_data(). ERR_free_strings(), EVP_cleanup() and CRYPTO_cleanup_all_ex_data().
* Why does Valgrind complain about the use of uninitialized data?
OpenSSL does internally call its own PRNG routines to retrieve random
numbers. It so does with uninitialed buffer contents. The buffer
contents is mixed into the entropy pool so that it technically does
not matter whether the buffer is initialized at this point or not.
Valgrind (and other test tools) will complain whatsoever. When
using Valgrind, make sure to use an OpenSSL library that has been
compiled with the PEDANTIC macro being defined (-DPEDANTIC) to
get rid of these warnings. Compling with -DPURIFY will help as well.
The PEDANTIC macro was added in OpenSSL 0.9.8f.
=============================================================================== ===============================================================================