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From: Thomas Huth <1832281@bugs.launchpad.net>
To: qemu-devel@nongnu.org
Subject: [Bug 1832281] Re: tcg bug master / 4.0.0 v8 operation >>> and |=
Date: Fri, 10 Jan 2020 09:42:03 -0000	[thread overview]
Message-ID: <157864932359.2371.3549129679446928281.malone@soybean.canonical.com> (raw)
In-Reply-To: 156021221413.18114.3680605096232908394.malonedeb@wampee.canonical.com

Patch had been included here:
https://git.qemu.org/?p=qemu.git;a=commitdiff;h=1e8a98b53867f61da9c

** Changed in: qemu
       Status: In Progress => Fix Released

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https://bugs.launchpad.net/bugs/1832281

Title:
  tcg bug master / 4.0.0 v8 operation >>> and |=

Status in QEMU:
  Fix Released

Bug description:
  vm guest is linux, executed with tcg
  running this Node.js snippet leads to

  $ node
  > a = undefined
  undefined
  > a >>> 0
  4294967295

  host node
  $ node
  > a = undefined
  undefined
  > a >>> 0
  0

  same with |=

  node
  Welcome to Node.js v12.4.0.
  Type ".help" for more information.
  > let buffer
  undefined
  > buffer |= 0
  0

  vm with tcg:

  $ ./out/Release/node --version
  v12.4.0
  ./out/Release/node -e "let buffer; buffer |= 0; console.log(buffer);"
  -1

  vm guest is debian x86_64 latest release
  vm guest is started with ./x86_64-softmmu/qemu-system-x86_64 -vnc :0 -cdrom debian-9.9.0-amd64-netinst.iso -m 4G -smp cores=6,threads=1,sockets=1 -nic user,hostfwd=tcp:ipv4addr:2233-:22 -cpu qemu64 debian.img

  git tag v4.0.0 and master, commit
  a578cdfbdd8f9beff5ced52b7826ddb1669abbbf, for building qemu-system-
  x86_64 was used.

  Node.js is compiled on the vm guest (v12.4.0 / master)

  see also
  https://github.com/nodejs/node/issues/19348#issuecomment-500465502

  I need further assistance to track down the cause of the bug.

  Kind regards
  Manuel

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      parent reply	other threads:[~2020-01-10  9:52 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-06-11  0:16 [Qemu-devel] [Bug 1832281] [NEW] tcg bug master / 4.0.0 v8 operation >>> and |= manuel baesler
2019-07-18 14:48 ` [Qemu-devel] [Bug 1832281] " Peter Maydell
2019-08-06 10:21 ` Peter Maydell
2019-08-06 17:54 ` manuel baesler
2019-08-06 21:17 ` manuel baesler
2019-08-07  9:29 ` Peter Maydell
2020-01-10  9:42 ` Thomas Huth [this message]

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