From: "Wang, Yipeng1" <yipeng1.wang@intel.com>
To: Andrzej Ostruszka <amo@semihalf.com>,
"dev@dpdk.org" <dev@dpdk.org>,
"Gobriel, Sameh" <sameh.gobriel@intel.com>,
"Richardson, Bruce" <bruce.richardson@intel.com>,
Chas Williams <chas3@att.com>,
"Burakov, Anatoly" <anatoly.burakov@intel.com>
Cc: "mattias.ronnblom@ericsson.com" <mattias.ronnblom@ericsson.com>,
"stephen@networkplumber.org" <stephen@networkplumber.org>
Subject: Re: [dpdk-dev] [PATCH v6 07/12] app/test: clean LTO build warnings (maybe-uninitialized)
Date: Thu, 7 Nov 2019 17:48:40 +0000 [thread overview]
Message-ID: <D2C4A16CA39F7F4E8E384D204491D7A673F2B980@ORSMSX104.amr.corp.intel.com> (raw)
In-Reply-To: <e174ad30-dec8-1d5d-4756-d79d601423cb@semihalf.com>
>-----Original Message-----
>From: Andrzej Ostruszka [mailto:amo@semihalf.com]
>Sent: Monday, November 4, 2019 5:48 AM
>To: Wang, Yipeng1 <yipeng1.wang@intel.com>; dev@dpdk.org; Gobriel, Sameh <sameh.gobriel@intel.com>; Richardson, Bruce
><bruce.richardson@intel.com>; Chas Williams <chas3@att.com>; Burakov, Anatoly <anatoly.burakov@intel.com>
>Cc: mattias.ronnblom@ericsson.com; stephen@networkplumber.org
>Subject: Re: [dpdk-dev] [PATCH v6 07/12] app/test: clean LTO build warnings (maybe-uninitialized)
>
>Yipeng
>
>Thank you for your comment. See my reply below.
>
>On 11/1/19 6:15 PM, Wang, Yipeng1 wrote:
>>> -----Original Message-----
>[...]
>>> diff --git a/app/test/test_hash_readwrite.c b/app/test/test_hash_readwrite.c
>>> index 4376b099b..615767fb6 100644
>>> --- a/app/test/test_hash_readwrite.c
>>> +++ b/app/test/test_hash_readwrite.c
>>> @@ -298,7 +298,7 @@ test_rw_reader(void *arg)
>>>
>>> begin = rte_rdtsc_precise();
>>> for (i = 0; i < read_cnt; i++) {
>>> - void *data;
>>> + void *data = arg;
>>
>> [Wang, Yipeng]
>> Hi Andrzej, thanks for the fix! Maybe you could initialize the data to be "NULL"?
>> I think it makes more sense to be NULL rather than arg.
>
>That actually is not a good idea. The conditional test below does not
>check return value from lookup and expects the returned pointer to data
>to be equal to the iteration count (these pointers do not point at
>anything). For the first loop iteration "data = NULL" could miss the
>problem of the key not being in the hash (key not in the hash, return
>value not checked but the pointer "data" is NULL as we expected since i
>= 0).
>
>What I used is a bit hackish - I assumed that arg pointer (which is
>pointing to the "read_cnt") will not be within [0-read_cnt] address
>range. If that is too hackish then it would be better to rework this
>function to actually test for return value of hash lookup. Let me know
>what you think.
>
>Regards
>Andrzej
[Wang, Yipeng] Thank you for the explanation. I think what you said makes sense.
next prev parent reply other threads:[~2019-11-07 17:48 UTC|newest]
Thread overview: 110+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-17 7:57 [dpdk-dev] [PATCH v2 00/10] Add an option to use LTO for DPDK build Andrzej Ostruszka
2019-09-17 7:57 ` [dpdk-dev] [PATCH v2 01/10] build: add an option to enable LTO build Andrzej Ostruszka
2019-09-18 10:36 ` Bruce Richardson
2019-09-18 13:32 ` Ray Kinsella
2019-09-19 12:35 ` Andrzej Ostruszka
2019-09-19 13:28 ` Ray Kinsella
2019-09-19 15:16 ` Bruce Richardson
2019-09-20 7:38 ` Ray Kinsella
2019-09-23 7:23 ` Thomas Monjalon
2019-09-23 9:36 ` Ray Kinsella
2019-09-23 10:16 ` Mattias Rönnblom
2019-09-23 12:03 ` Andrzej Ostruszka
2019-09-23 12:06 ` Bruce Richardson
2019-09-23 13:02 ` Andrzej Ostruszka
2019-09-23 16:13 ` Bruce Richardson
2019-09-24 6:46 ` Andrzej Ostruszka
2019-09-24 10:25 ` Bruce Richardson
2019-09-24 11:52 ` Andrzej Ostruszka
2019-09-24 12:11 ` Bruce Richardson
2019-09-24 12:59 ` Neil Horman
2019-09-24 16:01 ` Ray Kinsella
2019-09-26 15:32 ` Andrzej Ostruszka
2019-09-27 19:55 ` Bruce Richardson
2019-09-23 12:16 ` Ray Kinsella
2019-10-27 11:31 ` Thomas Monjalon
2019-10-28 8:36 ` Andrzej Ostruszka
2019-10-28 9:07 ` Thomas Monjalon
2019-10-28 12:12 ` Andrzej Ostruszka
2019-10-28 17:16 ` Thomas Monjalon
2019-09-17 7:57 ` [dpdk-dev] [PATCH v2 02/10] eventdev: fix possible use of uninitialized var Andrzej Ostruszka
2019-10-12 13:35 ` Jerin Jacob
2019-09-17 7:57 ` [dpdk-dev] [PATCH v2 03/10] app/eventdev: fix maybe-uninitialized warnings for LTO build Andrzej Ostruszka
2019-10-12 13:52 ` Jerin Jacob
2019-09-17 7:57 ` [dpdk-dev] [PATCH v2 04/10] event/octeontx2: " Andrzej Ostruszka
2019-09-17 7:57 ` [dpdk-dev] [PATCH v2 05/10] app/test: " Andrzej Ostruszka
2019-09-17 7:57 ` [dpdk-dev] [PATCH v2 06/10] net/dpaa2: fix possible use of uninitialized vars Andrzej Ostruszka
2019-09-17 7:57 ` [dpdk-dev] [PATCH v2 07/10] net/e1000: fix maybe-uninitialized warnings for LTO build Andrzej Ostruszka
2019-09-17 7:57 ` [dpdk-dev] [PATCH v2 08/10] net/i40e: " Andrzej Ostruszka
2019-09-17 7:57 ` [dpdk-dev] [PATCH v2 09/10] net/ifc: " Andrzej Ostruszka
2019-09-17 7:57 ` [dpdk-dev] [PATCH v2 10/10] net/qede: " Andrzej Ostruszka
[not found] ` <20191021105707.25691-1-aostruszka@marvell.com>
[not found] ` <20191021105707.25691-2-aostruszka@marvell.com>
2019-10-21 12:59 ` [dpdk-dev] [PATCH v3 01/10] build: add an option to enable " Bruce Richardson
2019-10-22 8:53 ` Andrzej Ostruszka
2019-10-22 11:54 ` [dpdk-dev] [PATCH v4 00/10] Add an option to use LTO for DPDK build Andrzej Ostruszka
2019-10-22 11:54 ` [dpdk-dev] [PATCH v4 01/10] build: add an option to enable LTO build Andrzej Ostruszka
2019-10-22 12:45 ` Bruce Richardson
2019-10-27 11:47 ` Thomas Monjalon
2019-10-28 10:47 ` Andrzej Ostruszka
2019-10-28 11:03 ` Thomas Monjalon
2019-10-22 11:54 ` [dpdk-dev] [PATCH v4 02/10] eventdev: fix possible use of uninitialized var Andrzej Ostruszka
2019-10-22 11:54 ` [dpdk-dev] [PATCH v4 03/10] app/eventdev: clean LTO build warnings (maybe-uninitialized) Andrzej Ostruszka
2019-10-22 11:54 ` [dpdk-dev] [PATCH v4 04/10] event/octeontx2: " Andrzej Ostruszka
2019-10-22 11:54 ` [dpdk-dev] [PATCH v4 05/10] app/test: " Andrzej Ostruszka
2019-10-22 11:54 ` [dpdk-dev] [PATCH v4 06/10] net/dpaa2: fix possible use of uninitialized vars Andrzej Ostruszka
2019-10-22 11:54 ` [dpdk-dev] [PATCH v4 07/10] net/e1000: clean LTO build warnings (maybe-uninitialized) Andrzej Ostruszka
2019-10-22 11:54 ` [dpdk-dev] [PATCH v4 08/10] net/i40e: " Andrzej Ostruszka
2019-10-22 11:54 ` [dpdk-dev] [PATCH v4 09/10] net/ifc: " Andrzej Ostruszka
2019-10-22 11:54 ` [dpdk-dev] [PATCH v4 10/10] net/qede: " Andrzej Ostruszka
2019-10-22 12:48 ` [dpdk-dev] [PATCH v4 00/10] Add an option to use LTO for DPDK build Bruce Richardson
2019-10-22 13:03 ` Andrzej Ostruszka
2019-10-28 14:21 ` [dpdk-dev] [PATCH v5 00/11] " Andrzej Ostruszka
2019-10-28 14:21 ` [dpdk-dev] [PATCH v5 01/11] build: annotate versioned symbols with __vsym macro Andrzej Ostruszka
2019-10-29 10:49 ` Neil Horman
2019-10-28 14:21 ` [dpdk-dev] [PATCH v5 02/11] build: add an option to enable LTO build Andrzej Ostruszka
2019-10-28 14:21 ` [dpdk-dev] [PATCH v5 03/11] eventdev: fix possible use of uninitialized var Andrzej Ostruszka
2019-10-28 14:21 ` [dpdk-dev] [PATCH v5 04/11] app/eventdev: clean LTO build warnings (maybe-uninitialized) Andrzej Ostruszka
2019-10-28 14:21 ` [dpdk-dev] [PATCH v5 05/11] event/octeontx2: " Andrzej Ostruszka
2019-10-28 14:21 ` [dpdk-dev] [PATCH v5 06/11] app/test: " Andrzej Ostruszka
2019-10-28 14:21 ` [dpdk-dev] [PATCH v5 07/11] net/dpaa2: fix possible use of uninitialized vars Andrzej Ostruszka
2019-10-28 14:21 ` [dpdk-dev] [PATCH v5 08/11] net/e1000: clean LTO build warnings (maybe-uninitialized) Andrzej Ostruszka
2019-10-28 14:21 ` [dpdk-dev] [PATCH v5 09/11] net/i40e: " Andrzej Ostruszka
2019-10-28 14:21 ` [dpdk-dev] [PATCH v5 10/11] net/ifc: " Andrzej Ostruszka
2019-10-28 14:21 ` [dpdk-dev] [PATCH v5 11/11] net/qede: " Andrzej Ostruszka
2019-10-29 14:12 ` [dpdk-dev] [PATCH v6 00/12] Add an option to use LTO for DPDK build Andrzej Ostruszka
2019-10-29 14:12 ` [dpdk-dev] [PATCH v6 01/12] doc: fix description of versioning macros Andrzej Ostruszka
2019-10-29 14:12 ` [dpdk-dev] [PATCH v6 02/12] build: annotate versioned symbols with __vsym macro Andrzej Ostruszka
2019-10-29 14:12 ` [dpdk-dev] [PATCH v6 03/12] build: add an option to enable LTO build Andrzej Ostruszka
2019-10-29 14:12 ` [dpdk-dev] [PATCH v6 04/12] eventdev: fix possible use of uninitialized var Andrzej Ostruszka
2019-10-29 14:12 ` [dpdk-dev] [PATCH v6 05/12] app/eventdev: clean LTO build warnings (maybe-uninitialized) Andrzej Ostruszka
2019-10-29 14:12 ` [dpdk-dev] [PATCH v6 06/12] event/octeontx2: " Andrzej Ostruszka
2019-10-29 14:12 ` [dpdk-dev] [PATCH v6 07/12] app/test: " Andrzej Ostruszka
2019-11-01 17:15 ` Wang, Yipeng1
2019-11-04 13:48 ` Andrzej Ostruszka
2019-11-07 17:48 ` Wang, Yipeng1 [this message]
2019-10-29 14:12 ` [dpdk-dev] [PATCH v6 08/12] net/dpaa2: fix possible use of uninitialized vars Andrzej Ostruszka
2019-11-04 11:46 ` Hemant Agrawal
2019-11-04 14:33 ` Andrzej Ostruszka
2019-10-29 14:12 ` [dpdk-dev] [PATCH v6 09/12] net/e1000: clean LTO build warnings (maybe-uninitialized) Andrzej Ostruszka
2019-10-29 14:12 ` [dpdk-dev] [PATCH v6 10/12] net/i40e: " Andrzej Ostruszka
2019-11-01 2:05 ` Xing, Beilei
2019-11-04 14:06 ` Andrzej Ostruszka
2019-10-29 14:12 ` [dpdk-dev] [PATCH v6 11/12] net/ifc: " Andrzej Ostruszka
2019-10-29 14:12 ` [dpdk-dev] [PATCH v6 12/12] net/qede: " Andrzej Ostruszka
2019-10-30 9:09 ` [dpdk-dev] [PATCH v6 00/12] Add an option to use LTO for DPDK build Andrzej Ostruszka
2019-10-30 14:23 ` Aaron Conole
2019-11-07 15:03 ` [dpdk-dev] [PATCH v7 " Andrzej Ostruszka
2019-11-07 15:03 ` [dpdk-dev] [PATCH v7 01/12] doc: fix description of versioning macros Andrzej Ostruszka
2019-11-07 15:03 ` [dpdk-dev] [PATCH v7 02/12] build: annotate versioned symbols with __vsym macro Andrzej Ostruszka
2019-11-07 15:03 ` [dpdk-dev] [PATCH v7 03/12] build: add an option to enable LTO build Andrzej Ostruszka
2019-11-07 15:03 ` [dpdk-dev] [PATCH v7 04/12] eventdev: fix possible use of uninitialized var Andrzej Ostruszka
2019-11-07 15:03 ` [dpdk-dev] [PATCH v7 05/12] app/eventdev: clean LTO build warnings (maybe-uninitialized) Andrzej Ostruszka
2019-11-07 15:03 ` [dpdk-dev] [PATCH v7 06/12] event/octeontx2: " Andrzej Ostruszka
2019-11-07 15:03 ` [dpdk-dev] [PATCH v7 07/12] app/test: " Andrzej Ostruszka
2019-11-07 17:53 ` Wang, Yipeng1
2019-11-07 15:03 ` [dpdk-dev] [PATCH v7 08/12] net/dpaa2: fix possible use of uninitialized vars Andrzej Ostruszka
2019-11-07 15:03 ` [dpdk-dev] [PATCH v7 09/12] net/e1000: clean LTO build warnings (maybe-uninitialized) Andrzej Ostruszka
2019-11-07 15:03 ` [dpdk-dev] [PATCH v7 10/12] net/i40e: " Andrzej Ostruszka
2019-11-07 15:03 ` [dpdk-dev] [PATCH v7 11/12] net/ifc: " Andrzej Ostruszka
2019-11-07 15:03 ` [dpdk-dev] [PATCH v7 12/12] net/qede: " Andrzej Ostruszka
2019-11-08 14:24 ` [dpdk-dev] [PATCH v7 00/12] Add an option to use LTO for DPDK build Thomas Monjalon
2019-11-01 21:33 ` [dpdk-dev] [PATCH v2 00/10] " Stephen Hemminger
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