Re: qemu-riscv32 usermode still broken?

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Re: qemu-riscv32 usermode still broken?

From:	Andreas K. Huettel
Subject:	Re: qemu-riscv32 usermode still broken?
Date:	Tue, 19 Sep 2023 22:39:06 +0200
Hi Alistair, 

> It would be great to get a strace of the failure to narrow down what
> it is. From there it should be not too hard to find and fix.

thanks a lot. Here's as much info as I could get with strace mechanisms.

1) What I did, without any tracing

pinacolada ~ # qemu-riscv32 -L /var/lib/machines/riscv32 
/var/lib/machines/riscv32/bin/bash
pinacolada ~ # python
Python 3.11.5 (main, Aug 27 2023, 18:39:05) [GCC 12.3.1 20230623] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>>
[1]+  Stopped                 python
^C^C
pinacolada ~ # ^C
pinacolada ~ # fg
python

pinacolada ~ #
exit

* When I type Ctrl-Z at the python prompt, the terminal hangs.
* With several Ctrl-C I can get back to the riscv32 bash, and then python is 
suspended in the background.

* Now I did this again, first with qemu tracing system calls, then with strace 
tracing qemu
* In both cases, the log starts when I type "python", and ends (with quickly 
repeated output lines) 
  after pressing Ctrl-Z

2) 
pinacolada ~ # QEMU_STRACE=1 qemu-riscv32 -L /var/lib/machines/riscv32 
/var/lib/machines/riscv32/bin/bash
(QEMU_STRACE is getting unset in my bashrc, so no subprocesses are traced)

(...)
2472050 write(2,0xe56c0,58)pinacolada ~ #  = 58
2472050 Unknown syscall 413
2472050 read(0,0x2b2aa29b,1) = 1
2472050 Unknown syscall 413
2472050 write(2,0xe56c0,1)p = 1
2472050 Unknown syscall 413
2472050 read(0,0x2b2aa29b,1) = 1
2472050 Unknown syscall 413
2472050 write(2,0xe56c0,1)y = 1
2472050 Unknown syscall 413
2472050 read(0,0x2b2aa29b,1) = 1
2472050 Unknown syscall 413
2472050 write(2,0xe56c0,1)t = 1
2472050 Unknown syscall 413
2472050 read(0,0x2b2aa29b,1) = 1
2472050 Unknown syscall 413
2472050 write(2,0xe56c0,1)h = 1
2472050 Unknown syscall 413
2472050 read(0,0x2b2aa29b,1) = 1
2472050 Unknown syscall 413
2472050 write(2,0xe56c0,1)o = 1
2472050 Unknown syscall 413
2472050 read(0,0x2b2aa29b,1) = 1
2472050 Unknown syscall 413
2472050 write(2,0xe56c0,1)n = 1
2472050 Unknown syscall 413
2472050 read(0,0x2b2aa29b,1) = 1
2472050 write(2,0xe56c0,1)
 = 1
 = 9050 write(2,0xe56c0,9)
2472050 ioctl(0,TCSETSW,{c_iflag = ICRNL|IXON|IXOFF|IUTF8,c_oflag = 
OPOST|ONLCR,c_cflag = B38400,CS8,CREAD,c_lflag = 
ISIG|ICANON|ECHO|ECHOE|ECHOK|ECHOCTL|ECHOKE|IEXTEN,c_cc = "",c_line = ''}) = 0
2472050 rt_sigaction(SIGINT,0x2b2aa1bc,0x2b2aa244) = 0
2472050 rt_sigaction(SIGHUP,0x2b2aa1bc,0x2b2aa244) = 0
2472050 rt_sigaction(SIGALRM,0x2b2aa1bc,0x2b2aa244) = 0
2472050 rt_sigaction(SIGWINCH,0x2b2aa1bc,0x2b2aa244) = 0
2472050 rt_sigaction(SIGINT,0x2b2aa14c,0x2b2aa1d4) = 0
2472050 clock_gettime64(CLOCK_REALTIME_COARSE,0x2b2aa268) = 0 
({tv_sec=1695154794,tv_nsec=760883171})
2472050 
statx(AT_FDCWD,".",AT_NO_AUTOMOUNT|AT_STATX_SYNC_AS_STAT,STATX_BASIC_STATS,0x2b2aaa78)
 = 0
2472050 
statx(AT_FDCWD,"/usr/local/sbin/python",AT_NO_AUTOMOUNT|AT_STATX_SYNC_AS_STAT,STATX_BASIC_STATS,0x2b2aa998)
 = -1 errno=2 (No such file or directory)
2472050 
statx(AT_FDCWD,"/usr/local/bin/python",AT_NO_AUTOMOUNT|AT_STATX_SYNC_AS_STAT,STATX_BASIC_STATS,0x2b2aa998)
 = -1 errno=2 (No such file or directory)
2472050 
statx(AT_FDCWD,"/usr/sbin/python",AT_NO_AUTOMOUNT|AT_STATX_SYNC_AS_STAT,STATX_BASIC_STATS,0x2b2aa998)
 = -1 errno=2 (No such file or directory)
2472050 
statx(AT_FDCWD,"/usr/bin/python",AT_NO_AUTOMOUNT|AT_STATX_SYNC_AS_STAT,STATX_BASIC_STATS,0x2b2aa998)
 = 0
2472050 
statx(AT_FDCWD,"/usr/bin/python",AT_NO_AUTOMOUNT|AT_STATX_SYNC_AS_STAT,STATX_BASIC_STATS,0x2b2aa8e8)
 = 0
2472050 geteuid() = 0
2472050 getegid() = 0
2472050 getuid() = 0
2472050 getgid() = 0
2472050 
faccessat(AT_FDCWD,"/usr/bin/python",X_OK,AT_SYMLINK_NOFOLLOW|0x1da42089) = 0
2472050 
statx(AT_FDCWD,"/usr/bin/python",AT_NO_AUTOMOUNT|AT_STATX_SYNC_AS_STAT,STATX_BASIC_STATS,0x2b2aa8e8)
 = 0
2472050 geteuid() = 0
2472050 getegid() = 0
2472050 getuid() = 0
2472050 getgid() = 0
2472050 
faccessat(AT_FDCWD,"/usr/bin/python",R_OK,AT_SYMLINK_NOFOLLOW|0x1da42089) = 0
2472050 rt_sigprocmask(SIG_BLOCK,NULL,0x2b2aabec,8) = 0
2472050 rt_sigprocmask(SIG_BLOCK,0x2b2aaaec,0x2b2aab6c,8) = 0
2472050 rt_sigaction(SIGTERM,0x2b2aa85c,0x2b2aa8e4) = 0
2472050 rt_sigprocmask(SIG_BLOCK,0x2b2aa98c,0x2b2aaa0c,8) = 0
2472050 rt_sigprocmask(SIG_SETMASK,0x2b2aaa0c,NULL,8) = 0
2472050 pipe2(0x5560d3f4,0) = 0
2472050 
clone(CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|0x11,child_stack=0x00000000,parent_tidptr=0x00000000,tls=0x00000000,child_tidptr=0x2b2d20c8)
 = 2472055
2472050 rt_sigaction(SIGTERM,0x2b2aa85c,0x2b2aa8e4) = 0
 = 0
2472050 setpgid(2472055,2472055) = 0
2472055 set_robust_list(0x2b2d20cc,12) = 2472050 
rt_sigprocmask(SIG_SETMASK,0x2b2aab6c,-1 errno=38 (Function not 
implemented)NULL,
8) = 0
2472055 getpid() = 2472055
2472055 rt_sigprocmask(SIG_SETMASK,0x55616e24,NULL,8) = 0
2472050 rt_sigprocmask(SIG_BLOCK,0x2b2aaaac,0x2b2aab2c,8) = 0
2472050 close(3) = 0
2472050 close(4) = 0
2472055 rt_sigaction(SIGTSTP,0x2b2aa84c,0x2b2aa8d4) = 0
2472055 rt_sigaction(SIGTTIN,0x2b2aa84c,0x2b2aa8d4) = 0
2472055 rt_sigaction(SIGTTOU,0x2b2aa85c,0x2b2aa8e4) = 0
2472055 setpgid(2472055,2472055) = 0
2472055 rt_sigprocmask(SIG_BLOCK,0x2b2aa99c,0x2b2aaa1c,8) = 0
2472055 ioctl(255,TIOCSPGRP,2472055) = 0
2472055 rt_sigprocmask(SIG_SETMASK,0x2b2aaa1c,NULL,8) = 0
2472050 ioctl(255,TIOCGPGRP,0x2b2aaa78) = 0 (2472055)2472055
close(4) = 0
2472050 rt_sigprocmask(SIG_SETMASK,0x2b2aab2c,NULL,2472055 
8)read(3,0x2b2aaaeb,1) = 0 =
0
2472055 close(3) = 0
2472050 rt_sigprocmask(SIG_BLOCK,0x2b2aabac,0x2b2aac2c,8) = 0
2472055 rt_sigaction(SIGHUP,0x2b2aaacc,NULL) = 0
2472055 rt_sigaction(SIGILL,0x2b2aaacc,NULL) = 0
2472055 rt_sigaction(SIGTRAP,0x2b2aaacc,NULL) = 0
2472055 rt_sigaction(SIGIOT,0x2b2aaacc,NULL) = 0
2472055 rt_sigaction(SIGFPE,0x2b2aaacc,NULL) = 0
2472055 rt_sigaction(SIGBUS,0x2b2aaacc,NULL) = 0
2472055 rt_sigaction(SIGSEGV,0x2b2aaacc,NULL) = 0
2472055 rt_sigaction(SIGSYS,0x2b2aaacc,NULL) = 0
2472055 rt_sigaction(SIGPIPE,0x2b2aaacc,NULL) = 0
2472050 2472055 
waitid(0,-1,0x2b2aaa7c,0xe)rt_sigaction(SIGALRM,0x2b2aaacc,NULL) = 0
2472055 rt_sigaction(SIGXCPU,0x2b2aaacc,NULL) = 0
2472055 rt_sigaction(SIGXFSZ,0x2b2aaacc,NULL) = 0
2472055 rt_sigaction(SIGVTALRM,0x2b2aaacc,NULL) = 0
2472055 rt_sigaction(SIGUSR1,0x2b2aaacc,NULL) = 0
2472055 rt_sigaction(SIGUSR2,0x2b2aaacc,NULL) = 0
2472055 rt_sigaction(SIGINT,0x2b2aaa0c,0x2b2aaa94) = 0
2472055 rt_sigaction(SIGQUIT,0x2b2aaa0c,0x2b2aaa94) = 0
2472055 rt_sigaction(SIGTERM,0x2b2aaa0c,0x2b2aaa94) = 0
2472055 rt_sigaction(SIGCHLD,0x2b2aaa0c,0x2b2aaa94) = 0
2472055 execve("/usr/bin/python",{"python",NULL})Python 3.11.5 (main, Aug 27 
2023, 18:39:05) [GCC 12.3.1 20230623] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>>  = 0
2472050 rt_sigprocmask(SIG_BLOCK,0x2b2aa9ec,0x2b2aaa6c,8) = 0
2472050 rt_sigprocmask(SIG_SETMASK,0x2b2aaa6c,NULL,8) = 0
2472050 rt_sigprocmask(SIG_BLOCK,0x2b2aa9ec,0x2b2aaa6c,8) = 0
2472050 rt_sigprocmask(SIG_SETMASK,0x2b2aaa6c,NULL,8) = 0
2472050 rt_sigprocmask(SIG_BLOCK,0x2b2aaa6c,0x2b2aaaec,8) = 0
2472050 ioctl(255,TIOCSPGRP,2472050) = 0
2472050 rt_sigprocmask(SIG_SETMASK,0x2b2aaaec,NULL,8) = 0
2472050 ioctl(255,TCSETSW,{c_iflag = ICRNL|IXON|IXOFF|IUTF8,c_oflag = 
OPOST|ONLCR,c_cflag = B38400,CS8,CREAD,c_lflag = 
ISIG|ICANON|ECHO|ECHOE|ECHOK|ECHOCTL|ECHOKE|IEXTEN,c_cc = "",c_line = ''}) = 0
2472050 ioctl(255,TIOCGWINSZ,0x2b2aab74) = 0 ({49,194,1749,896})
2472050 write(2,0xe56c0,1)
 = 1
2472050 
openat(AT_FDCWD,"/usr/share/locale/locale.alias",O_RDONLY|O_LARGEFILE|O_CLOEXEC)
 = 3
2472050 
statx(3,"",AT_EMPTY_PATH|AT_NO_AUTOMOUNT|AT_STATX_SYNC_AS_STAT,STATX_BASIC_STATS,0x2b2aa3b8)
 = 0
2472050 read(3,0xf4d00,4096) = 2998
2472050 read(3,0xf4d00,4096) = 0
2472050 close(3) = 0
2472050 
openat(AT_FDCWD,"/usr/share/locale/en_US.utf8/LC_MESSAGES/bash.mo",O_RDONLY|O_LARGEFILE)
 = -1 errno=2 (No such file or directory)
2472050 
openat(AT_FDCWD,"/usr/share/locale/en_US/LC_MESSAGES/bash.mo",O_RDONLY|O_LARGEFILE)
 = -1 errno=2 (No such file or directory)
2472050 
openat(AT_FDCWD,"/usr/share/locale/en.utf8/LC_MESSAGES/bash.mo",O_RDONLY|O_LARGEFILE)
 = -1 errno=2 (No such file or directory)
2472050 
openat(AT_FDCWD,"/usr/share/locale/en/LC_MESSAGES/bash.mo",O_RDONLY|O_LARGEFILE)
 = -1 errno=2 (No such file or directory)
2472050 write(2,0xe56c0,37)[1]+  Stopped                 python
 = 37
2472050 rt_sigprocmask(SIG_SETMASK,0x2b2aac2c,NULL,8) = 0
--- SIGCHLD {si_signo=SIGCHLD, si_code=5, si_pid=2472055, si_uid=0, 
si_status=20, si_utime=2, si_stime=0} ---
2472050 waitid(0,-1,0x2b2aa70c,0xf) = 0
2472050 waitid(0,-1,0x2b2aa70c,0xf) = 0
2472050 waitid(0,-1,0x2b2aa70c,0xf) = 0
2472050 waitid(0,-1,0x2b2aa70c,0xf) = 0
2472050 waitid(0,-1,0x2b2aa70c,0xf) = 0
2472050 waitid(0,-1,0x2b2aa70c,0xf) = 0
2472050 waitid(0,-1,0x2b2aa70c,0xf) = 0
2472050 waitid(0,-1,0x2b2aa70c,0xf) = 0
2472050 waitid(0,-1,0x2b2aa70c,0xf) = 0
2472050 waitid(0,-1,0x2b2aa70c,0xf) = 0
2472050 waitid(0,-1,0x2b2aa70c,0xf) = 0
2472050 waitid(0,-1,0x2b2aa70c,0xf) = 0
2472050 waitid(0,-1,0x2b2aa70c,0xf) = 0
2472050 waitid(0,-1,0x2b2aa70c,0xf) = 0
(...)

3)
pinacolada ~ # strace qemu-riscv32 -L /var/lib/machines/riscv32 
/var/lib/machines/riscv32/bin/bash

(...)
write(2, "\33]0;root@pinacolada:~\7\33[01;31mpi"..., 58pinacolada ~ # ) = 58
pselect6(1, [0], NULL, NULL, NULL, {sigmask=[], sigsetsize=8}) = 1 (in [0])
read(0, "p", 1)                         = 1
pselect6(1, [0], NULL, [0], {tv_sec=0, tv_nsec=0}, NULL) = 0 (Timeout)
write(2, "p", 1p)                        = 1
pselect6(1, [0], NULL, NULL, NULL, {sigmask=[], sigsetsize=8}) = 1 (in [0])
read(0, "y", 1)                         = 1
pselect6(1, [0], NULL, [0], {tv_sec=0, tv_nsec=0}, NULL) = 0 (Timeout)
write(2, "y", 1y)                        = 1
pselect6(1, [0], NULL, NULL, NULL, {sigmask=[], sigsetsize=8}) = 1 (in [0])
read(0, "t", 1)                         = 1
pselect6(1, [0], NULL, [0], {tv_sec=0, tv_nsec=0}, NULL) = 0 (Timeout)
write(2, "t", 1t)                        = 1
pselect6(1, [0], NULL, NULL, NULL, {sigmask=[], sigsetsize=8}) = 1 (in [0])
read(0, "h", 1)                         = 1
pselect6(1, [0], NULL, [0], {tv_sec=0, tv_nsec=0}, NULL) = 0 (Timeout)
write(2, "h", 1h)                        = 1
pselect6(1, [0], NULL, NULL, NULL, {sigmask=[], sigsetsize=8}) = 1 (in [0])
read(0, "o", 1)                         = 1
pselect6(1, [0], NULL, [0], {tv_sec=0, tv_nsec=0}, NULL) = 0 (Timeout)
write(2, "o", 1o)                        = 1
pselect6(1, [0], NULL, NULL, NULL, {sigmask=[], sigsetsize=8}) = 1 (in [0])
read(0, "n", 1)                         = 1
pselect6(1, [0], NULL, [0], {tv_sec=0, tv_nsec=0}, NULL) = 0 (Timeout)
write(2, "n", 1n)                        = 1
pselect6(1, [0], NULL, NULL, NULL, {sigmask=[], sigsetsize=8}) = 1 (in [0])
read(0, "\r", 1)                        = 1
write(2, "\n", 1
)                       = 1
)             = 904l\r", 9
ioctl(0, TCSETSW, {c_iflag=ICRNL|IXON|IXOFF|IUTF8, 
c_oflag=NL0|CR0|TAB0|BS0|VT0|FF0|OPOST|ONLCR, c_cflag=B38400|CS8|CREAD, 
c_lflag=ISIG|ICANON|ECHO|ECHOE|ECHOK|IEXTEN|ECHOCTL|ECHOKE, ...}) = 0
rt_sigprocmask(SIG_SETMASK, ~[RTMIN RT_1], NULL, 8) = 0
rt_sigaction(SIGINT, {sa_handler=0x4c2160, sa_mask=~[RTMIN RT_1], 
sa_flags=SA_RESTORER|SA_SIGINFO, sa_restorer=0x5cdb50}, NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, ~[RTMIN RT_1], NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, ~[RTMIN RT_1], NULL, 8) = 0
rt_sigaction(SIGHUP, {sa_handler=0x4c2160, sa_mask=~[RTMIN RT_1], 
sa_flags=SA_RESTORER|SA_SIGINFO, sa_restorer=0x5cdb50}, NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, ~[RTMIN RT_1], NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, ~[RTMIN RT_1], NULL, 8) = 0
rt_sigaction(SIGALRM, {sa_handler=0x4c2160, sa_mask=~[RTMIN RT_1], 
sa_flags=SA_RESTORER|SA_SIGINFO, sa_restorer=0x5cdb50}, NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, ~[RTMIN RT_1], NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, ~[RTMIN RT_1], NULL, 8) = 0
rt_sigaction(SIGWINCH, {sa_handler=0x4c2160, sa_mask=~[RTMIN RT_1], 
sa_flags=SA_RESTORER|SA_RESTART|SA_SIGINFO, sa_restorer=0x5cdb50}, NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, ~[RTMIN RT_1], NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, ~[RTMIN RT_1], NULL, 8) = 0
rt_sigaction(SIGINT, {sa_handler=0x4c2160, sa_mask=~[RTMIN RT_1], 
sa_flags=SA_RESTORER|SA_SIGINFO, sa_restorer=0x5cdb50}, NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, ~[RTMIN RT_1], NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
statx(AT_FDCWD, ".", AT_STATX_SYNC_AS_STAT|AT_NO_AUTOMOUNT, STATX_BASIC_STATS, 
{stx_mask=STATX_BASIC_STATS|STATX_MNT_ID, stx_attributes=0, 
stx_mode=S_IFDIR|0700, stx_size=16384, ...}) = 0
statx(AT_FDCWD, "/usr/local/sbin/python", 
AT_STATX_SYNC_AS_STAT|AT_NO_AUTOMOUNT, STATX_BASIC_STATS, 0x7fff3f875900) = -1 
ENOENT (No such file or directory)
statx(AT_FDCWD, "/usr/local/bin/python", AT_STATX_SYNC_AS_STAT|AT_NO_AUTOMOUNT, 
STATX_BASIC_STATS, 0x7fff3f875900) = -1 ENOENT (No such file or directory)
statx(AT_FDCWD, "/usr/sbin/python", AT_STATX_SYNC_AS_STAT|AT_NO_AUTOMOUNT, 
STATX_BASIC_STATS, 0x7fff3f875900) = -1 ENOENT (No such file or directory)
statx(AT_FDCWD, "/usr/bin/python", AT_STATX_SYNC_AS_STAT|AT_NO_AUTOMOUNT, 
STATX_BASIC_STATS, {stx_mask=STATX_BASIC_STATS|STATX_MNT_ID, stx_attributes=0, 
stx_mode=S_IFREG|0755, stx_size=18808, ...}) = 0
statx(AT_FDCWD, "/usr/bin/python", AT_STATX_SYNC_AS_STAT|AT_NO_AUTOMOUNT, 
STATX_BASIC_STATS, {stx_mask=STATX_BASIC_STATS|STATX_MNT_ID, stx_attributes=0, 
stx_mode=S_IFREG|0755, stx_size=18808, ...}) = 0
geteuid()                               = 0
getegid()                               = 0
getuid()                                = 0
getgid()                                = 0
faccessat2(AT_FDCWD, "/usr/bin/python", X_OK, 0) = 0
statx(AT_FDCWD, "/usr/bin/python", AT_STATX_SYNC_AS_STAT|AT_NO_AUTOMOUNT, 
STATX_BASIC_STATS, {stx_mask=STATX_BASIC_STATS|STATX_MNT_ID, stx_attributes=0, 
stx_mode=S_IFREG|0755, stx_size=18808, ...}) = 0
geteuid()                               = 0
getegid()                               = 0
getuid()                                = 0
getgid()                                = 0
faccessat2(AT_FDCWD, "/usr/bin/python", R_OK, 0) = 0
rt_sigprocmask(SIG_SETMASK, ~[RTMIN RT_1], NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, ~[RTMIN RT_1], NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, [INT TERM CHLD], NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, ~[RTMIN RT_1], NULL, 8) = 0
rt_sigaction(SIGTERM, {sa_handler=0x4c2160, sa_mask=~[RTMIN RT_1], 
sa_flags=SA_RESTORER|SA_SIGINFO, sa_restorer=0x5cdb50}, NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, ~[RTMIN RT_1], NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, [INT TERM CHLD], NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, ~[RTMIN RT_1], NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, ~[RTMIN RT_1], NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, [INT TERM CHLD], NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, ~[RTMIN RT_1], NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, ~[RTMIN RT_1], NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, [INT TERM CHLD], NULL, 8) = 0
pipe2([3, 4], 0)                        = 0
rt_sigprocmask(SIG_SETMASK, ~[RTMIN RT_1], NULL, 8) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, 
child_tidptr=0x228b790) = 2472081
rt_sigprocmask(SIG_SETMASK, ~[RTMIN RT_1], NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, [INT TERM CHLD], NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, ~[RTMIN RT_1], NULL, 8) = 0
rt_sigaction(SIGTERM, {sa_handler=SIG_IGN, sa_mask=~[RTMIN RT_1], 
sa_flags=SA_RESTORER|SA_SIGINFO, sa_restorer=0x5cdb50}, NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, ~[RTMIN RT_1], NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, [INT TERM CHLD], NULL, 8) = 0
setpgid(2472081, 2472081)               = 0
rt_sigprocmask(SIG_SETMASK, ~[RTMIN RT_1], NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, ~[RTMIN RT_1], NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, ~[RTMIN RT_1], NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, ~[RTMIN RT_1], NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, [CHLD], NULL, 8) = 0
close(3)                                = 0
close(4)                                = 0
ioctl(255, TIOCGPGRP, [2472081])        = 0
rt_sigprocmask(SIG_SETMASK, ~[RTMIN RT_1], NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, ~[RTMIN RT_1], NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, ~[RTMIN RT_1], NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, ~[RTMIN RT_1], NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, [CHLD], NULL, 8) = 0
waitid(P_ALL, -1, Python 3.11.5 (main, Aug 27 2023, 18:39:05) [GCC 12.3.1 
20230623] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> {si_signo=SIGCHLD, si_code=CLD_STOPPED, si_pid=2472081, si_uid=0, 
>>> si_status=SIGTSTP, si_utime=140734259223024 /* 1407342592230.24 s */, 
>>> si_stime=4923637 /* 49236.37 s */}, WEXITED|WSTOPPED|WCONTINUED, NULL) = 0
rt_sigprocmask(SIG_SETMASK, ~[RTMIN RT_1], NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, ~[RTMIN RT_1], NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, [CHLD], NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, ~[RTMIN RT_1], NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, ~[RTMIN RT_1], NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, [CHLD], NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, ~[RTMIN RT_1], NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, ~[RTMIN RT_1], NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, [CHLD], NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, ~[RTMIN RT_1], NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, ~[RTMIN RT_1], NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, [CHLD], NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, ~[RTMIN RT_1], NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, ~[RTMIN RT_1], NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, [CHLD TSTP TTIN TTOU], NULL, 8) = 0
ioctl(255, TIOCSPGRP, [2472076])        = 0
rt_sigprocmask(SIG_SETMASK, ~[RTMIN RT_1], NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, ~[RTMIN RT_1], NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, [CHLD], NULL, 8) = 0
ioctl(255, TCSETSW, {c_iflag=ICRNL|IXON|IXOFF|IUTF8, 
c_oflag=NL0|CR0|TAB0|BS0|VT0|FF0|OPOST|ONLCR, c_cflag=B38400|CS8|CREAD, 
c_lflag=ISIG|ICANON|ECHO|ECHOE|ECHOK|IEXTEN|ECHOCTL|ECHOKE, ...}) = 0
ioctl(255, TIOCGWINSZ, {ws_row=49, ws_col=194, ws_xpixel=1749, ws_ypixel=896}) 
= 0
write(2, "\n", 1
)                       = 1
futex(0x8800f8, FUTEX_WAKE_PRIVATE, 2147483647) = 0
readlink("/usr", 0x7fff3f8742a0, 1023)  = -1 EINVAL (Invalid argument)
readlink("/usr/share", 0x7fff3f8742a0, 1023) = -1 EINVAL (Invalid argument)
readlink("/usr/share/locale", 0x7fff3f8742a0, 1023) = -1 EINVAL (Invalid 
argument)
readlink("/usr/share/locale/locale.alias", 0x7fff3f8742a0, 1023) = -1 EINVAL 
(Invalid argument)
access("/var/lib/machines/riscv32/usr/share/locale/locale.alias", F_OK) = 0
openat(AT_FDCWD, "/var/lib/machines/riscv32/usr/share/locale/locale.alias", 
O_RDONLY|O_CLOEXEC) = 3
statx(3, "", AT_STATX_SYNC_AS_STAT|AT_NO_AUTOMOUNT|AT_EMPTY_PATH, 
STATX_BASIC_STATS, {stx_mask=STATX_ALL|STATX_MNT_ID, stx_attributes=0, 
stx_mode=S_IFREG|0644, stx_size=2998, ...}) = 0
read(3, "# Locale name alias data base.\n#"..., 4096) = 2998
read(3, "", 4096)                       = 0
close(3)                                = 0
readlink("/usr", 0x7fff3f8742a0, 1023)  = -1 EINVAL (Invalid argument)
readlink("/usr/share", 0x7fff3f8742a0, 1023) = -1 EINVAL (Invalid argument)
readlink("/usr/share/locale", 0x7fff3f8742a0, 1023) = -1 EINVAL (Invalid 
argument)
readlink("/usr/share/locale/en_US.utf8", 0x7fff3f8742a0, 1023) = -1 ENOENT (No 
such file or directory)
access("/var/lib/machines/riscv32/usr/share/locale/en_US.utf8/LC_MESSAGES/bash.mo",
 F_OK) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/share/locale/en_US.utf8/LC_MESSAGES/bash.mo", O_RDONLY) 
= -1 ENOENT (No such file or directory)
readlink("/usr", 0x7fff3f8742a0, 1023)  = -1 EINVAL (Invalid argument)
readlink("/usr/share", 0x7fff3f8742a0, 1023) = -1 EINVAL (Invalid argument)
readlink("/usr/share/locale", 0x7fff3f8742a0, 1023) = -1 EINVAL (Invalid 
argument)
readlink("/usr/share/locale/en_US", 0x7fff3f8742a0, 1023) = -1 EINVAL (Invalid 
argument)
readlink("/usr/share/locale/en_US/LC_MESSAGES", 0x7fff3f8742a0, 1023) = -1 
EINVAL (Invalid argument)
readlink("/usr/share/locale/en_US/LC_MESSAGES/bash.mo", 0x7fff3f8742a0, 1023) = 
-1 ENOENT (No such file or directory)
access("/var/lib/machines/riscv32/usr/share/locale/en_US/LC_MESSAGES/bash.mo", 
F_OK) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/share/locale/en_US/LC_MESSAGES/bash.mo", O_RDONLY) = -1 
ENOENT (No such file or directory)
readlink("/usr", 0x7fff3f8742a0, 1023)  = -1 EINVAL (Invalid argument)
readlink("/usr/share", 0x7fff3f8742a0, 1023) = -1 EINVAL (Invalid argument)
readlink("/usr/share/locale", 0x7fff3f8742a0, 1023) = -1 EINVAL (Invalid 
argument)
readlink("/usr/share/locale/en.utf8", 0x7fff3f8742a0, 1023) = -1 ENOENT (No 
such file or directory)
access("/var/lib/machines/riscv32/usr/share/locale/en.utf8/LC_MESSAGES/bash.mo",
 F_OK) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/share/locale/en.utf8/LC_MESSAGES/bash.mo", O_RDONLY) = 
-1 ENOENT (No such file or directory)
readlink("/usr", 0x7fff3f8742a0, 1023)  = -1 EINVAL (Invalid argument)
readlink("/usr/share", 0x7fff3f8742a0, 1023) = -1 EINVAL (Invalid argument)
readlink("/usr/share/locale", 0x7fff3f8742a0, 1023) = -1 EINVAL (Invalid 
argument)
readlink("/usr/share/locale/en", 0x7fff3f8742a0, 1023) = -1 EINVAL (Invalid 
argument)
readlink("/usr/share/locale/en/LC_MESSAGES", 0x7fff3f8742a0, 1023) = -1 EINVAL 
(Invalid argument)
readlink("/usr/share/locale/en/LC_MESSAGES/bash.mo", 0x7fff3f8742a0, 1023) = -1 
ENOENT (No such file or directory)
access("/var/lib/machines/riscv32/usr/share/locale/en/LC_MESSAGES/bash.mo", 
F_OK) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/share/locale/en/LC_MESSAGES/bash.mo", O_RDONLY) = -1 
ENOENT (No such file or directory)
write(2, "[1]+  Stopped                 py"..., 37[1]+  Stopped                 
python
) = 37
rt_sigprocmask(SIG_SETMASK, ~[RTMIN RT_1], NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, ~[RTMIN RT_1], NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_STOPPED, si_pid=2472081, si_uid=0, 
si_status=SIGTSTP, si_utime=2 /* 0.02 s */, si_stime=0} ---
rt_sigreturn({mask=~[BUS SEGV]})        = 0
rt_sigprocmask(SIG_SETMASK, ~[RTMIN RT_1], NULL, 8) = 0
rt_sigprocmask(SIG_SETMASK, [CHLD], NULL, 8) = 0
waitid(P_ALL, -1, {}, WNOHANG|WEXITED|WSTOPPED|WCONTINUED, NULL) = 0
waitid(P_ALL, -1, {}, WNOHANG|WEXITED|WSTOPPED|WCONTINUED, NULL) = 0
waitid(P_ALL, -1, {}, WNOHANG|WEXITED|WSTOPPED|WCONTINUED, NULL) = 0
waitid(P_ALL, -1, {}, WNOHANG|WEXITED|WSTOPPED|WCONTINUED, NULL) = 0
waitid(P_ALL, -1, {}, WNOHANG|WEXITED|WSTOPPED|WCONTINUED, NULL) = 0
waitid(P_ALL, -1, {}, WNOHANG|WEXITED|WSTOPPED|WCONTINUED, NULL) = 0
waitid(P_ALL, -1, {}, WNOHANG|WEXITED|WSTOPPED|WCONTINUED, NULL) = 0
waitid(P_ALL, -1, {}, WNOHANG|WEXITED|WSTOPPED|WCONTINUED, NULL) = 0
waitid(P_ALL, -1, {}, WNOHANG|WEXITED|WSTOPPED|WCONTINUED, NULL) = 0
waitid(P_ALL, -1, {}, WNOHANG|WEXITED|WSTOPPED|WCONTINUED, NULL) = 0
waitid(P_ALL, -1, {}, WNOHANG|WEXITED|WSTOPPED|WCONTINUED, NULL) = 0
waitid(P_ALL, -1, {}, WNOHANG|WEXITED|WSTOPPED|WCONTINUED, NULL) = 0
waitid(P_ALL, -1, {}, WNOHANG|WEXITED|WSTOPPED|WCONTINUED, NULL) = 0
waitid(P_ALL, -1, {}, WNOHANG|WEXITED|WSTOPPED|WCONTINUED, NULL) = 0
waitid(P_ALL, -1, {}, WNOHANG|WEXITED|WSTOPPED|WCONTINUED, NULL) = 0
(...)



-- 
Andreas K. Hüttel
dilfridge@gentoo.org
Gentoo Linux developer
(council, toolchain, base-system, perl, libreoffice)
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