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sortix-mirror/kernel
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Jonas 'Sortie' Termansen 3154492dcf Fix deadlocks and lost wakeups in threading primitives. 
The futex and kutex implementations used the same linked list for waiting,
however the futex implementation used kutexs and the same thread could be in
the same list twice in the case of contention. This case corrupted the wait
lists and led to deadlocks and lost wakeups. This change fixes the problem
by having separate data structures for futexes and kutexes.

Mutexes contended by multiple threads could lead to lost wakeups since only
one contended thread was awoken and subsequent unlocks are unaware of the
unawakened contended threads. This change fixes the problem with a temporary
solution of waking all the contended threads until a better design is
implemented.

Additional details are tweaked to be more reliable and simpler.
2022-12-10 21:29:23 +01:00
..
disk Rename CLOCK_BOOT to CLOCK_BOOTTIME. 2022-02-22 18:01:57 +00:00
fs Never deliver signals during stat(2), readlink(2), open(2), and truncate(2). 2022-04-26 00:50:54 +02:00
gpu/bga Switch bga(4) to the new PCI API. 2022-11-16 20:22:29 +01:00
include/sortix Fix deadlocks and lost wakeups in threading primitives. 2022-12-10 21:29:23 +01:00
kb Include the main kernel header in some kernel files. 2022-04-26 01:08:42 +02:00
mouse Include the main kernel header in some kernel files. 2022-04-26 01:08:42 +02:00
net Implement local and remote addresses in filesystem sockets. 2022-03-03 20:52:15 +01:00
x64 Implement threading primitives that truly sleep. 2021-06-23 22:10:47 +02:00
x86 Support i686 without SSE. 2022-01-09 23:38:16 +02:00
x86-family Rename CLOCK_BOOT to CLOCK_BOOTTIME. 2022-02-22 18:01:57 +00:00
.gitignore Allow bootloader bitmap framebuffer modesetting. 2016-01-08 19:56:11 +01:00
addralloc.cpp Fix kernel/addralloc.cpp file header comment. 2017-08-20 12:44:59 +02:00
alarm.cpp Fix handling of overflow and non-canonical values in timespec APIs. 2021-06-22 21:48:27 +02:00
clock.cpp Fix absolute timers triggering in the wrong order. 2022-12-03 22:43:33 +01:00
com.cpp Fix concurrent serial port read and write. 2016-11-03 22:10:45 +01:00
com.h Relicense Sortix to the ISC license. 2016-03-05 22:21:50 +01:00
copy.cpp Implement threading primitives that truly sleep. 2021-06-23 22:10:47 +02:00
descriptor.cpp Implement file descriptor passing. 2021-12-31 22:24:11 +01:00
dnsconfig.cpp Add getdnsconfig(2) and setdnsconfig(2). 2021-06-13 23:27:52 +02:00
dtable.cpp Fix dtable allocation overflow on INT_MAX. 2022-06-09 22:47:06 +02:00
elf.cpp Optimize is_power_of_two. 2016-11-06 17:42:13 +01:00
end.cpp Relicense Sortix to the ISC license. 2016-03-05 22:21:50 +01:00
fcache.cpp Fix SEEK_END, file offset overflow, and read/write/mkpartition syscall bugs. 2017-12-04 23:56:46 +01:00
fsfunc.cpp Relicense Sortix to the ISC license. 2016-03-05 22:21:50 +01:00
hostname.cpp Fix sethostname(2) nul termination. 2022-10-23 14:42:10 +02:00
identity.cpp Fix setuid(2) and setgid(2) not setting the effective user and group. 2021-07-27 00:46:42 +02:00
initrd.cpp Add --append-to kernel(7) multiboot module option. 2018-12-08 22:54:28 +01:00
initrd.h Relicense Sortix to the ISC license. 2016-03-05 22:21:50 +01:00
inode.cpp Fix chown(2) not supporting -1 to not set the owner and group. 2022-01-15 20:48:54 +01:00
interlock.cpp Implement threading primitives that truly sleep. 2021-06-23 22:10:47 +02:00
interrupt.cpp Implement threading primitives that truly sleep. 2021-06-23 22:10:47 +02:00
io.cpp Return EBADF on negative fds for dup2(2) and dup3(2). 2022-02-10 17:56:25 +00:00
ioctx.cpp Relicense Sortix to the ISC license. 2016-03-05 22:21:50 +01:00
kernel.cpp Remove kernel thread alignment since malloc is already 16-byte aligned. 2022-04-26 01:08:46 +02:00
kernelinfo.cpp Fix kernelinfo(2) user-space pointer deference. 2022-04-26 01:08:39 +02:00
kthread.cpp Fix deadlocks and lost wakeups in threading primitives. 2022-12-10 21:29:23 +01:00
lfbtextbuffer.cpp Implement threading primitives that truly sleep. 2021-06-23 22:10:47 +02:00
lfbtextbuffer.h Fix LFBTextBuffer GetChar starting worker thread when paused. 2018-08-06 23:59:35 +02:00
libk.cpp Abort on overlapping memcpy. 2021-05-30 23:48:19 +02:00
linebuffer.cpp Relicense Sortix to the ISC license. 2016-03-05 22:21:50 +01:00
linebuffer.h Relicense Sortix to the ISC license. 2016-03-05 22:21:50 +01:00
log.cpp Add cache-aware memory mapping functions. 2017-02-19 12:13:32 +01:00
logterminal.cpp Implement Alt + key mapping to Esc followed by key in kernel tty 2021-05-05 00:19:56 +02:00
logterminal.h Add support for sessions. 2016-11-23 22:30:47 +01:00
Makefile Fix non-throwing operator new failure checks being optimized away. 2022-04-26 01:08:19 +02:00
memorymanagement.cpp Fix SEEK_END, file offset overflow, and read/write/mkpartition syscall bugs. 2017-12-04 23:56:46 +01:00
mtable.cpp Relicense Sortix to the ISC license. 2016-03-05 22:21:50 +01:00
multiboot.h Upgrade to latest upstream multiboot header. 2014-12-01 22:51:07 +01:00
op-new.cpp Fix non-throwing operator new failure checks being optimized away. 2022-04-26 01:08:19 +02:00
palette.h Support 8-bit/24-bit color and more escape codes in the graphical console. 2016-11-27 11:19:03 +01:00
panic.cpp Fix technical typo. 2017-04-08 22:20:03 +02:00
partition.cpp Implement file descriptor passing. 2021-12-31 22:24:11 +01:00
partition.h Relicense Sortix to the ISC license. 2016-03-05 22:21:50 +01:00
pci-mmio.cpp Add cache-aware memory mapping functions. 2017-02-19 12:13:32 +01:00
pci.cpp Add PCI scanning functions and busmastering functions. 2017-02-19 12:10:59 +01:00
pipe.cpp Implement file descriptor passing. 2021-12-31 22:24:11 +01:00
poll.cpp Fix kernel deadlock in ppoll(2). 2021-07-14 15:41:28 +02:00
process.cpp Make execve(2) require 1 <= argc. 2022-02-13 16:31:41 +00:00
psctl.cpp Fix psctl(2) not setting uid, euid, gid, and egid. 2021-02-11 20:47:49 +01:00
ptable.cpp Relicense Sortix to the ISC license. 2016-03-05 22:21:50 +01:00
pty.cpp Fix pty write and read logic. 2022-12-03 22:36:34 +01:00
pty.h Add pseudo terminals. 2016-11-23 22:31:05 +01:00
random.cpp Seed kernel entropy with randomness from the previous boot. 2016-10-04 00:34:50 +02:00
refcount.cpp Relicense Sortix to the ISC license. 2016-03-05 22:21:50 +01:00
registers.cpp Relicense Sortix to the ISC license. 2016-03-05 22:21:50 +01:00
resource.cpp Add support for sessions. 2016-11-23 22:30:47 +01:00
scheduler.cpp Fix deadlocks and lost wakeups in threading primitives. 2022-12-10 21:29:23 +01:00
segment.cpp Relicense Sortix to the ISC license. 2016-03-05 22:21:50 +01:00
signal.cpp Implement threading primitives that truly sleep. 2021-06-23 22:10:47 +02:00
sockopt.cpp Relicense Sortix to the ISC license. 2016-03-05 22:21:50 +01:00
string.cpp Include the main kernel header in some kernel files. 2022-04-26 01:08:42 +02:00
syscall.cpp Implement threading primitives that truly sleep. 2021-06-23 22:10:47 +02:00
textbuffer.cpp Fix operator spacing in kernel/textbuffer.cpp. 2017-04-18 23:32:00 +02:00
textterminal.cpp Fix saving and restoring console cursor position. 2017-01-22 22:28:58 +01:00
textterminal.h Support 8-bit/24-bit color and more escape codes in the graphical console. 2016-11-27 11:19:03 +01:00
thread.cpp Fix deadlocks and lost wakeups in threading primitives. 2022-12-10 21:29:23 +01:00
time.cpp Rename CLOCK_BOOT to CLOCK_BOOTTIME. 2022-02-22 18:01:57 +00:00
timer.cpp Fix handling of overflow and non-canonical values in timespec APIs. 2021-06-22 21:48:27 +02:00
tty.cpp Fix improper uses of ScopedLockSignal. 2021-02-11 20:47:47 +01:00
tty.h Add support for sessions. 2016-11-23 22:30:47 +01:00
uart.cpp Add debug uart utility functions. 2016-11-27 11:18:48 +01:00
uart.h Add debug uart utility functions. 2016-11-27 11:18:48 +01:00
user-timer.cpp Fix handling of overflow and non-canonical values in timespec APIs. 2021-06-22 21:48:27 +02:00
vga.cpp Relicense Sortix to the ISC license. 2016-03-05 22:21:50 +01:00
vga.h Relicense Sortix to the ISC license. 2016-03-05 22:21:50 +01:00
vgafont.f16 Allow bootloader bitmap framebuffer modesetting. 2016-01-08 19:56:11 +01:00
vgatextbuffer.cpp Support 8-bit/24-bit color and more escape codes in the graphical console. 2016-11-27 11:19:03 +01:00
vgatextbuffer.h Refactor graphical resolution changes. 2016-11-27 11:18:48 +01:00
video.cpp Refactor graphical resolution changes. 2016-11-27 11:18:48 +01:00
vnode.cpp Implement file descriptor passing. 2021-12-31 22:24:11 +01:00
worker.cpp Relicense Sortix to the ISC license. 2016-03-05 22:21:50 +01:00