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2020 Jul 15
2
[MTE] Tagging Globals
Thanks for the update, Phillips.
Yes, please add me, Stephen and Ana (CCed) to Phabricator reviews.
Zhaoshi
From: Mitch Phillips <mitchp at google.com>
Sent: Tuesday, July 14, 2020 19:10
To: Zhaoshi Zheng <zhaoshiz at quicinc.com>
Cc: llvm-dev at lists.llvm.org; Stephen Long <steplong at quicinc.com>
Subject: [EXT] Re: [llvm-dev] [MTE] Tagging Globals
Hi Zhaoshi,
Currently there's no global tagging instrumentation for MTE. We have a good idea about the implementation's design - but no patches are ready to be shared at this stage.
If you'd like - I'd be more...
2020 Jul 15
2
[MTE] Tagging Globals
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> Zhaoshi
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> *From:* llvm-dev <llvm-dev-bounces at lists.llvm.org> *On Behalf Of *Zhaoshi
> Zheng via llvm-dev
> *Sent:* Tuesday, July 14, 2020 21:34
> *To:* Mitch Phillips <mitchp at google.com>
> *Cc:* llvm-dev at lists.llvm.org; Stephen Long <steplong at quicinc.com>
> *Subject:* [EXT] Re: [llvm-dev] [MTE] Tagging Globals
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> Thanks for the update, Phillips.
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> Yes, please add me, Stephen and Ana (CCed) to Phabricator reviews.
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> Zhaoshi
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> *From:* Mitch Phillips <mitchp...
2020 Jul 15
2
[MTE] Tagging Globals
Hello,
We're evaluating memory tagging (MTE) on some internal workloads.
We noticed that stack variables are tagged by an instrumentation pass and heap objects are handled by the allocator (Scudo).
How about global variables? We tried a simple case using -march=armv8a+memtag -fsanitize=memtag, but found no tagging:
Are we missing anything or tagging globals is still in progress?
int