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[Qemu-devel] [Bug 1673976] Re: linux-user clone() can't handle glibc pos
From: |
Peter Maydell |
Subject: |
[Qemu-devel] [Bug 1673976] Re: linux-user clone() can't handle glibc posix_spawn() (causes locale-gen to assert) |
Date: |
Sat, 03 Mar 2018 11:56:04 -0000 |
Unfortunately that won't work, because if we do a clone(CLONE_VM) in
QEMU that will mean that parent and child share not just the guest
address space, but also all the QEMU data structures for the emulated
CPUs and also the host libc data structures. Then actions done by the
child will update those data structures and break execution of the
parent when it resumes.
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https://bugs.launchpad.net/bugs/1673976
Title:
linux-user clone() can't handle glibc posix_spawn() (causes locale-gen
to assert)
Status in QEMU:
New
Bug description:
I'm running a command (locale-gen) inside of an armv7h chroot mounted
on my x86_64 desktop by putting qemu-arm-static into /usr/bin/ of the
chroot file system and I get a core dump.
locale-gen
Generating locales...
en_US.UTF-8...localedef: ../sysdeps/unix/sysv/linux/spawni.c:360:
__spawnix: Assertion `ec >= 0' failed.
qemu: uncaught target signal 6 (Aborted) - core dumped
/usr/bin/locale-gen: line 41: 34 Aborted (core dumped)
localedef -i $input -c -f $charset -A /usr/share/locale/locale.alias $locale
I've done this same thing successfully for years, but this breakage
has appeared some time in the last 3 or so months. Possibly with the
update to qemu version 2.8.
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