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Re: [Qemu-devel] [PULL v3 00/53] Misc changes for 2017-01-12
From: |
Paolo Bonzini |
Subject: |
Re: [Qemu-devel] [PULL v3 00/53] Misc changes for 2017-01-12 |
Date: |
Tue, 16 Jan 2018 14:54:00 +0100 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.5.0 |
On 16/01/2018 14:47, Peter Maydell wrote:
> On 16 January 2018 at 13:41, Paolo Bonzini <address@hidden> wrote:
>> On 16/01/2018 13:06, Peter Maydell wrote:
>>>> ASAN is enabled by default if available when --enable-debug. We could
>>>> add more flags if that helps.
>>> Configure switches should work like this:
>>> * default: use feature if present, but don't complain if not present
>>> or not usable
>>> * --enable-foo: use feature. if feature not present, complain and
>>> fail configure
>>> * --disable-foo: don't test for or use feature
>>>
>>
>> However, --enable-debug has never worked like this (the "default" part)...
>
> True, but -g, no optimization isn't really something we want to
> default to :-)
Same for ASAN. :-)
> I think the general principle that unless the user
> specifically said they cared about the address sanitizer we shouldn't
> complain if it happens not to work on this host is still a good one.
Yes, I agree.
So we need two options:
* --enable-asan defaults to not used, but also fails configure if ASAN
is not available/usable.
* if we want to have --enable-debug enable ASAN, it should however _not_
fail configure if ASAN is not available/usable. (I am not sure anymore
it's a good idea).
The questions are:
* should fiber support be required for --enable-asan? What is the
difference in the quality of the reports?
* if not, and assuming --enable-debug tries to enable ASAN, should
--enable-debug complain if fiber support is not required? Should
--enable-debug enable ASAN if fiber support is not available?
* if --enable-debug does *not* try to enable ASAN, should test-debug add
--enable-asn? (I think so).
Paolo
- [Qemu-devel] [PULL v3 00/53] Misc changes for 2017-01-12, Paolo Bonzini, 2018/01/15
- [Qemu-devel] [PULL 53/53] ucontext: annotate coroutine stack for ASAN, Paolo Bonzini, 2018/01/15
- [Qemu-devel] [PULL 46/53] cpu_physical_memory_sync_dirty_bitmap: Another alignment fix, Paolo Bonzini, 2018/01/15
- Re: [Qemu-devel] [PULL v3 00/53] Misc changes for 2017-01-12, Peter Maydell, 2018/01/16
- Re: [Qemu-devel] [PULL v3 00/53] Misc changes for 2017-01-12, Marc-André Lureau, 2018/01/16
- Re: [Qemu-devel] [PULL v3 00/53] Misc changes for 2017-01-12, Peter Maydell, 2018/01/16
- Re: [Qemu-devel] [PULL v3 00/53] Misc changes for 2017-01-12, Paolo Bonzini, 2018/01/16
- Re: [Qemu-devel] [PULL v3 00/53] Misc changes for 2017-01-12, Peter Maydell, 2018/01/16
- Re: [Qemu-devel] [PULL v3 00/53] Misc changes for 2017-01-12,
Paolo Bonzini <=
- Re: [Qemu-devel] [PULL v3 00/53] Misc changes for 2017-01-12, Marc-André Lureau, 2018/01/16
- Re: [Qemu-devel] [PULL v3 00/53] Misc changes for 2017-01-12, Paolo Bonzini, 2018/01/16
- Re: [Qemu-devel] [PULL v3 00/53] Misc changes for 2017-01-12, Peter Maydell, 2018/01/16
- Re: [Qemu-devel] [PULL v3 00/53] Misc changes for 2017-01-12, Marc-André Lureau, 2018/01/16
- Re: [Qemu-devel] [PULL v3 00/53] Misc changes for 2017-01-12, Peter Maydell, 2018/01/16
- Re: [Qemu-devel] [PULL v3 00/53] Misc changes for 2017-01-12, Paolo Bonzini, 2018/01/16