On 6/5/24 02:14, Andreas Schwab wrote:
$ qemu-x86_64 --version qemu-x86_64 version 9.0.50 (v9.0.0-1211-gd16cab541a) Copyright (c) 2003-2024 Fabrice Bellard and the QEMU Project developers $ cat fork.rb begin r, w = IO.pipe if pid1 = fork w.close r.read 1 Process.kill "USR1", pid1 Process.wait2 pid1 else print "child\n" r.close if pid2 = fork trap("USR1") { print "child: kill\n"; Process.kill "USR2", pid2 } w.close print "child: wait\n" Process.wait2 pid2 else print "grandchild\n" w.close sleep 0.2 end end end $ ruby fork.rb child child: wait grandchild child: kill $ qemu-x86_64 /usr/bin/ruby fork.rb child child: wait ^Z [1]+ Stopped qemu-x86_64 /usr/bin/ruby fork.rb $ grep SigB $(for p in $(pidof qemu-x86_64); do echo /proc/$p/status; done | sort) /proc/3221/status:SigBlk: 0000000000000000 /proc/3224/status:SigBlk: 0000000000000000 /proc/3228/status:SigBlk: fffffff27ffbfa9f
Works for me: rth@stoup:~/zz$ ~/qemu/bld/qemu-x86_64 `which ruby` fork.rb child grandchild child: wait child: kill rth@stoup:~/zz$ ~/qemu/bld/qemu-x86_64 `which ruby` fork.rb child grandchild child: wait child: kill rth@stoup:~/zz$ ~/qemu/bld/qemu-x86_64 `which ruby` fork.rb child grandchild child: wait child: kill rth@stoup:~/zz$ ~/qemu/bld/qemu-x86_64 `which ruby` fork.rb child grandchild child: wait child: kill r~
