From: Jakub Jelinek <jakub@redhat.com>
To: Konstantin Serebryany <konstantin.s.serebryany@gmail.com>
Cc: Dodji Seketeli <dodji@redhat.com>, Wei Mi <wmi@google.com>,
Mike Stump <mikestump@comcast.net>,
GCC Patches <gcc-patches@gcc.gnu.org>,
David Li <davidxl@google.com>,
Diego Novillo <dnovillo@google.com>,
Kostya Serebryany <kcc@google.com>,
Dodji Seketeli <dseketel@redhat.com>,
Alexander Potapenko <glider@google.com>,
Evgeniy Stepanov <eugenis@google.com>,
Alexey Samsonov <samsonov@google.com>,
Dmitry Vyukov <dvyukov@google.com>
Subject: Re: [PATCH] asan unit tests from llvm lit-test incremental changes
Date: Thu, 13 Dec 2012 15:22:00 -0000 [thread overview]
Message-ID: <20121213152206.GU2315@tucnak.redhat.com> (raw)
In-Reply-To: <CAGQ9bdx=KiGHgu8RA8OsWNehY8hWsPTMs071OiOzqKo8rmiBUg@mail.gmail.com>
On Thu, Dec 13, 2012 at 02:22:52PM +0400, Konstantin Serebryany wrote:
> I've added two flags, both on by default for now.
>
> // Use fast (frame-pointer-based) unwinder on fatal errors (if available).
> bool fast_unwind_on_fatal;
> // Use fast (frame-pointer-based) unwinder on malloc/free (if available).
> bool fast_unwind_on_malloc;
>
>
> % clang -fsanitize=address -g
> ~/llvm/projects/compiler-rt/lib/asan/lit_tests/overflow-in-qsort.cc
> % ASAN_OPTIONS=fast_unwind_on_fatal=0 ./a.out 2>&1 | asan_symbolize.py
> / | grep '#'
> #0 0x419731 in QsortCallback overflow-in-qsort.cc:18
> #1 0x7fa7e137b61f in msort_with_tmp msort.c:143
> #2 0x7fa7e137baba in msort_with_tmp msort.c:46
> #3 0x419a58 in MyQsort overflow-in-qsort.cc:25
> #4 0x419c94 in main overflow-in-qsort.cc:33
> #5 0x7fa7e136276c in __libc_start_main libc-start.c:226
> #6 0x4193ac in _start ??:0
> % ASAN_OPTIONS=fast_unwind_on_fatal=1 ./a.out 2>&1 | asan_symbolize.py
> / | grep '#'
> #0 0x419731 in QsortCallback overflow-in-qsort.cc:18
> #1 0x7f816783f61f in msort_with_tmp msort.c:143
> %
>
> This feature still needs some love.
> I'll set fast_unwind_on_fatal to 0 after some testing and then merge
> to gcc (unless there is a rush).
I'll wait for your commit, then will test it on Fedora. msort.c and qsort.c
are definitely built with -fasynchronous-unwind-tables -fexceptions though,
at least by default.
> If we want to support new handler and allow asan's malloc to return 0,
> it is much easier and cleaner to implement it from scratch.
libstdc++ doesn't have __new_handler exported I think, and there is no way
to query it outside of libstdc++ itself though. One can only set it.
Jakub
next prev parent reply other threads:[~2012-12-13 15:22 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-11-28 9:15 [PATCH] asan unit tests from llvm lit-test Wei Mi
2012-11-28 10:10 ` Konstantin Serebryany
2012-11-28 10:25 ` Jakub Jelinek
2012-11-28 10:41 ` Konstantin Serebryany
2012-11-28 11:03 ` Jakub Jelinek
2012-11-28 11:14 ` Konstantin Serebryany
2012-11-29 20:59 ` [PATCH] asan_test.cc from llvm Jakub Jelinek
2012-11-30 9:35 ` Konstantin Serebryany
2012-11-30 10:22 ` Jakub Jelinek
2012-11-30 10:55 ` Konstantin Serebryany
2012-11-30 14:52 ` Jakub Jelinek
2012-11-30 16:06 ` Jakub Jelinek
[not found] ` <CAKOQZ8y70goUL91pQJt_S=8W+Dn5VTZ5oRphvGuFwMMh41mkLg@mail.gmail.com>
2012-11-30 16:34 ` Jakub Jelinek
2012-12-03 7:07 ` Konstantin Serebryany
2012-12-03 9:18 ` Jakub Jelinek
2012-12-03 9:52 ` Konstantin Serebryany
2012-12-03 11:05 ` Jakub Jelinek
2012-12-03 11:42 ` Konstantin Serebryany
2012-11-28 11:25 ` [PATCH] asan unit tests from llvm lit-test Jakub Jelinek
2012-11-28 11:39 ` Konstantin Serebryany
2012-11-28 10:14 ` Jakub Jelinek
2012-11-30 21:05 ` Wei Mi
2012-12-03 7:16 ` Konstantin Serebryany
2012-12-03 11:01 ` Jakub Jelinek
2012-12-03 18:33 ` Wei Mi
2012-12-03 18:49 ` Konstantin Serebryany
2012-12-03 19:44 ` Jakub Jelinek
2012-12-03 19:09 ` Mike Stump
2012-12-03 19:37 ` Jakub Jelinek
2012-12-03 19:50 ` Mike Stump
[not found] ` <CAN=P9pgjjq66KS2DVkuOSeH2ejQPDcyKhwz5MdKyE3RB64E=xw@mail.gmail.com>
2012-12-04 7:34 ` Jakub Jelinek
2012-12-04 18:01 ` Wei Mi
2012-12-05 12:29 ` [PATCH] asan unit tests from llvm lit-test incremental changes Jakub Jelinek
2012-12-12 21:32 ` Dodji Seketeli
2012-12-12 21:31 ` Jakub Jelinek
2012-12-13 7:44 ` Konstantin Serebryany
2012-12-13 8:37 ` Jakub Jelinek
2012-12-13 10:23 ` Konstantin Serebryany
2012-12-13 15:22 ` Jakub Jelinek [this message]
2012-12-05 23:29 ` [asan] Fix up dg-set-target-env-var Jakub Jelinek
2012-12-06 0:23 ` Mike Stump
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20121213152206.GU2315@tucnak.redhat.com \
--to=jakub@redhat.com \
--cc=davidxl@google.com \
--cc=dnovillo@google.com \
--cc=dodji@redhat.com \
--cc=dseketel@redhat.com \
--cc=dvyukov@google.com \
--cc=eugenis@google.com \
--cc=gcc-patches@gcc.gnu.org \
--cc=glider@google.com \
--cc=kcc@google.com \
--cc=konstantin.s.serebryany@gmail.com \
--cc=mikestump@comcast.net \
--cc=samsonov@google.com \
--cc=wmi@google.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).