[Qemu-devel] [Bug 1696773] Re: golang calls to exec crash user emulation

[Peter Maydell]

The 'qemucrash' test case problem seems to be because we were
incorrectly implementing 'sigaltstack' as setting a process-wide signal
stack. This is incorrect, as sigaltstack stacks are supposed to be per-
thread, and the Go runtime relies on this. I've just sent a patch which
seems to me to fix the qemucrash test case, at least:

https://patchew.org/QEMU/address@hidden/


** Changed in: qemu
       Status: Confirmed => Won't Fix

** Changed in: qemu
       Status: Won't Fix => In Progress

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https://bugs.launchpad.net/bugs/1696773

Title:
  golang calls to exec crash user emulation

Status in QEMU:
  In Progress

Bug description:
  An example program can be found here:

  https://github.com/willnewton/qemucrash

  This code starts a goroutine (thread) and calls exec repeatedly. This
  works ok natively but when run under ARM user emulation it segfaults
  (usually, there are occasionally other failures).

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