From: "Byron Hawkins" <byronh@uci.edu>
To: QEMU Developer List <qemu-devel@nongnu.org>
Subject: [Qemu-devel] Running programs that dynamically generate code
Date: Thu, 28 Aug 2014 19:24:32 -0700 [thread overview]
Message-ID: <36d601cfc330$5eb23ea0$1c16bbe0$@uci.edu> (raw)
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Hi, I'm working on a research project to optimize binary translation for
target applications that dynamically generate code, such as browser JIT
engines. When I run the octane benchmark in Chrome v8 under QEMU (i.e.,
qemu-x86_64), it shows significant overhead compared to a native run. Can
someone tell me how QEMU maintains consistency with the target application
when it dynamically generates code? For example, does it set executable
pages readonly and catch the page fault when the target app writes to it? I
searched the documentation and mailing list, but all the references to
"dynamically generated code" and "JIT" are about code generated by QEMU, not
about code generated by the target application. If there is a document about
this somewhere, please send me a link-or just a basic explanation would also
be very helpful. Thanks.
Byron
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next reply other threads:[~2014-08-29 2:25 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-08-29 2:24 Byron Hawkins [this message]
2014-08-29 9:22 ` [Qemu-devel] Running programs that dynamically generate code Peter Maydell
2014-09-02 8:16 ` Byron Hawkins
2014-09-02 8:50 ` Peter Maydell
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