The builtin function __builtin_umul_overflow returns a boolean and
should not checked as an integer.
Signed-off-by: Flavio Ceolin <flavio.ceolin@intel.com>
Removing an unnecessary check in k_mem_pool_alloc. The condition is
already being checked in the if.
MISRA-C rule 14.3
Signed-off-by: Flavio Ceolin <flavio.ceolin@intel.com>
A final else statement must be provided when an if statement is
followed by one or more else if.
MISRA-C rule 15.7
Signed-off-by: Flavio Ceolin <flavio.ceolin@intel.com>
When delta_ticks_from_prev is not 0, the variable ticks will necessarily
be lesser or equal 0, so the if checking that is no necessary.
MISRA-C rule 15.7
Signed-off-by: Flavio Ceolin <flavio.ceolin@intel.com>
According C99 the first 31 characters of an identifier must be unique.
Shortening the namespace of the generated objects to achieve it.
C99 - 5.2.4.1
MISRA-C rule 5.1
Signed-off-by: Flavio Ceolin <flavio.ceolin@intel.com>
Under GNU C, sizeof(void) = 1. This commit merely makes it explicit u8.
Pointer arithmetics over void types is:
* A GNU C extension
* Not supported by Clang
* Illegal across all ISO C standards
See also: https://gcc.gnu.org/onlinedocs/gcc/Pointer-Arith.html
Signed-off-by: Mark Ruvald Pedersen <mped@oticon.com>
Change APIs that essentially return a boolean expression - 0 for
false and 1 for true - to return a bool.
MISRA-C rule 14.4
Signed-off-by: Flavio Ceolin <flavio.ceolin@intel.com>
Added k_thread_name_set() and enable thread name setting when declaring
static threads. This is enabled only when THREAD_MONITOR is used. System
threads get a name by default.
Signed-off-by: Anas Nashif <anas.nashif@intel.com>
This commit improves the help text of INIT_STACKS
Kconfig option, so it indicates that the stack
initialization applies also to the interrupt stack.
Fixes#7196.
Signed-off-by: Ioannis Glaropoulos <Ioannis.Glaropoulos@nordicsemi.no>
The Kconfig option CONFIG_BUILD_TIMESTAMP became unused when
BUILD_VERSION was introduced, but it's option and parts of it's
implementation was not completely cleaned from the repository.
Signed-off-by: Sebastian Bøe <sebastian.boe@nordicsemi.no>
Add ifdef guard to the z_reset_timeslice() to fix compilation
errors when CONFIG_TIMESLICING is disabled.
Signed-off-by: Daniel Leung <daniel.leung@intel.com>
Several style and typo fixes in inline comments of arm kernel
files and thread.c.
Signed-off-by: Ioannis Glaropoulos <Ioannis.Glaropoulos@nordicsemi.no>
_pend_current_thread can return any arbitrary value set by
_set_thred_return_value(), it happens that most cases set 0. This
function can not rely on this behavior otherwise it may return an
invalid value and/or not set data's value.
Signed-off-by: Flavio Ceolin <flavio.ceolin@intel.com>
Make while statement using pointers explicitly check whether
the value is NULL or not.
The C standard does not say that the null pointer is the same
as the pointer to memory address 0 and because of this is a good
practice always compare with the macro NULL.
Signed-off-by: Flavio Ceolin <flavio.ceolin@intel.com>
MISRA C requires that every controlling expression of and if or while
statement have a boolean type.
Signed-off-by: Flavio Ceolin <flavio.ceolin@intel.com>
Make if statement using pointers explicitly check whether the value is
NULL or not.
The C standard does not say that the null pointer is the same as the
pointer to memory address 0 and because of this is a good practice
always compare with the macro NULL.
Signed-off-by: Flavio Ceolin <flavio.ceolin@intel.com>
Rename _DEVICE_STRUCT_SIZE to _DEVICE_STRUCT_SIZEOF. This causes it to
be picked by the script 'gen_offset_header.py' and inserted into the
header file 'include/generated/offsets.h'.
Renaming from x_SIZE to x_SIZEOF will align it's name with the other
symbols that denote a sctruct's size, like K_THREAD_SIZEOF.
Furthermore, it will allow the symbol to be accessed through a header
file define, instead of only as an extern symbol. This is more
flexible, and more aligned with the other symbols in offsets.
Finally, if we are able to move all of offsets.c symbols into the
offsets.h header file we be able to remove offsets.o from the link and
thereby simplify the linking process.
Signed-off-by: Sebastian Bøe <sebastian.boe@nordicsemi.no>
Any word started with underscore followed by and uppercase letter or a
second underscore is a reserved word according with C99.
With have *many* violations on Zephyr's code, this commit is tackling
only the violations caused by headers guards. It also takes the
opportunity to normalize them using the filename in uppercase and
replacing dot with underscore. e.g file.h -> FILE_H
Signed-off-by: Flavio Ceolin <flavio.ceolin@intel.com>
Checking the return of some scattered functions across kernel.
MISRA-C requires that all non-void functions have their return value
checked, though, in some cases there is nothing to do. Just
acknowledging it.
Signed-off-by: Flavio Ceolin <flavio.ceolin@intel.com>
k_thread_create is used only in k_word_q_start that has no error
handling, so the return of that function is not used.
Signed-off-by: Flavio Ceolin <flavio.ceolin@intel.com>
A lot of times this API is called during some cleanup even if the
timeout was not set to make the code simpler. In these cases it's not
necessary checking the return. Adding a cast to acknowledge it.
Signed-off-by: Flavio Ceolin <flavio.ceolin@intel.com>
Ignoring the return of _abort_timeout when there is nothing to
do. Either because the condition to return something different from 0
was prior checked or because it was called during come cleanup.
Signed-off-by: Flavio Ceolin <flavio.ceolin@intel.com>
There are some cases that there is nothing to do with
_pend_current_thread() return (that is _Swap return value).
As MISRA-C requires that all non-void functions have their
return value checked, we are explicitly ignoring it when there is
nothing to do.
Signed-off-by: Flavio Ceolin <flavio.ceolin@intel.com>
The return of memset is never checked. This patch explicitly ignore
the return to avoid MISRA-C violations.
The only directory excluded directory was ext/* since it contains
only imported code.
Signed-off-by: Flavio Ceolin <flavio.ceolin@intel.com>
__swap function was returning -EAGAIN in some case, though its return
value was declared as unsigned int.
This commit changes this function to return int since it can return a
negative value and its return was already been propagate as int.
Signed-off-by: Flavio Ceolin <flavio.ceolin@intel.com>
The implementation of this syscall can return either 0 or -ENOMEM, but
when USERSPACE is enabled and it is called through syscall it always
return 0.
Just change this syscall implementation to return the value of
_impl_k_stack_alloc_init
Signed-off-by: Flavio Ceolin <flavio.ceolin@intel.com>
MISRA-C requires that every switch clause has a break instruction.
Changing gen_kobject_list script to generates compliance code.
Signed-off-by: Flavio Ceolin <flavio.ceolin@intel.com>
This reverts commit 17e9d623b4.
Single thread keep introducing more issues, decided to remove the
feature completely and push any required changes for after 1.13.
See #9808
Signed-off-by: Anas Nashif <anas.nashif@intel.com>
Now that we call main() with interrupts enabled in !MULTITHREADING, we
need to disable them again for the final fallback "loop-forever
because user code returned" state. Otherwise some architectures will
toss interrupts into a context where we obviously aren't prepared.
Signed-off-by: Andy Ross <andrew.j.ross@intel.com>
Previously (as introduced in 48fadfe62), if k_poll() waited on a
queue (or subclass like fifo), and wait was cancelled on queue's
side using k_queue_cancel_wait(), k_poll returned -EINTR. But it
did not set event->state field (to anything else but
K_POLL_STATE_NOT_READY), so in case of waiting on multiple queues,
it was not possible to differentiate which of them was cancelled.
This in particular broke detection of network socket EOF conditions
in POSIX poll() implementation.
This situation is now resolved with introduction of explicit
K_POLL_STATE_CANCELLED state, which is now set for cancelled queue
(-EINTR return remains the same).
This change also elaborates docstring for the functions mentioned, to
document this behavior.
Fixes: #9032
Signed-off-by: Paul Sokolovsky <paul.sokolovsky@linaro.org>
If k_pipe_block_put() is called and the pipe does not have enough
space to accomodate all the data in the memory pool, the subsequent
get operation will cause a CPU fault. The CPU fault is caused by
the timeout struct in the dummy thread not being initialized and
thus the scheduler will read bad memory. After fixing this,
another issue came up where the get operation would stall with
k_pipe_block_put() in same situation. This is due to the async
descriptor not being setup correctly. So fix this too.
This was discovered when debugging #9273.
Signed-off-by: Daniel Leung <daniel.leung@intel.com>
When adding a new runnable thread in tickless mode, we need to detect
whether it will timeslice with the running thread and reset the timer,
otherwise it won't get any CPU time until the next interrupt fires at
some indeterminate time in the future.
This fixes the specific bug discussed in #7193, but the broader
problem of tickless and timeslicing interacting badly remains. The
code as it exists needs some rework to avoid all the #ifdef mess.
Signed-off-by: Andy Ross <andrew.j.ross@intel.com>
Some applications have a use case for a tiny MULTITHREADING=n build
(which lacks most of the kernel) but still want special-purpose
drivers in that mode that might need to handle interupts. This
creates a chicken and egg problem, as arch code (for obvious reasons)
runs _Cstart() with interrupts disabled, and enables them only on
switching into a newly created thread context. Zephyr does not have a
"turn interrupts on now, please" API at the architecture level.
So this creates one as an arch-specific wrapper around
_arch_irq_unlock(). It's implemented as an optional macro the arch
can define to enable this behavior, falling back to the previous
scheme (and printing a helpful message) if it doesn't find it defined.
Only ARM and x86 are enabled in this patch.
Fixes#8393
Signed-off-by: Andy Ross <andrew.j.ross@intel.com>
When adding a new runnable thread in tickless mode, we need to detect
whether it will timeslice with the runnable thread and reset the
timer, otherwise it won't get any CPU time until the next interrupt
fires at some indeterminate time in the future.
This fixes the specific bug discussed in #7193, but the broader
problem of tickless and timeslicing interacting badly remains. The
code as it exists needs some rework to avoid all the #ifdef mess.
Note that the patch also moves _ready_thread() from a ksched.h inline
to sched.c.
Signed-off-by: Andy Ross <andrew.j.ross@intel.com>
This fixes#8669, and is distressingly subtle for a one-line patch:
The list iteration code in _handle_expired_timeouts() would remove the
timeout from our (temporary -- the dlist header is on the stack of our
calling function) list of expired timeouts before invoking the
handler. But sys_dlist_remove() only fixes up the containing list
pointers, leaving garbage in the node. If the action of that handler
is to re-add the timeout (which is very common!) then that will then
try to remove it AGAIN from the same list.
Even then, the common case is that the expired list contains only one
item, so the result is a perfectly valid empty list that affects
nothing. But if you have more than one, you get a corrupt cycle in
the iteration list and things get weird.
As it happens, there's no value in trying to remove this timeout from
the temporary list at all. Just iterate over it naturally.
Really, this design is fragile: we shouldn't be reusing the list nodes
in struct _timeout for this purpose and should figure out some other
mechanism. But this fix should be good for now.
Signed-off-by: Andy Ross <andrew.j.ross@intel.com>
