We utilize defines like -ESHUTDOWN in the network stack. To support
this errno value with newlib we need to enable
__LINUX_ERRNO_EXTENSIONS__.
Signed-off-by: Kumar Gala <kumar.gala@linaro.org>
If we use newlib the isdigit (and other similar functions) return an
error as char can possibly be viewed as signed:
usr/include/ctype.h:57:54: error: array subscript has type ‘char’ [-Werror=char-subscripts]
#define __ctype_lookup(__c) ((__ctype_ptr__+sizeof(""[__c]))[(int)(__c)])
Explicity cast to unsigned char so we deal with both this warning and
possible warning when -Wpointer-sign is enabled.
Signed-off-by: Kumar Gala <kumar.gala@linaro.org>
For some reason %F wasn't supported initially. Its simple enough to
handle the case difference in infinity and NaN handling to add support
for %F.
Signed-off-by: Kumar Gala <kumar.gala@linaro.org>
The C standard says that %f should use '[-]inf' or '[-]infinity' (which
style is implementation defined) for infinity handling and '[-]nan' for
NaN.
We where adding a '+' and had the wrong case for 'inf' and 'nan'.
Before -> After
+INF -> inf
-INF -> -inf
NaN -> nan
Signed-off-by: Kumar Gala <kumar.gala@linaro.org>
For %{e,E,g,G} conversion specifiers the C standard says the exponent
contains at least two digits, and only as many digits are necessary. So
instead of 1.234000e-001 we should have 1.234000e-01.
Signed-off-by: Kumar Gala <kumar.gala@linaro.org>
memcpy copies upto (rc-1)th index but the write of NULL character
to the string is at (rc+1)th index skipping (rc)th index.
The fix addresses this as well.
CID: 186491
Fixes Issue #8280
Signed-off-by: Subramanian Meenakshi Sundaram <subbu147@gmail.com>
Bool symbols implicitly default to 'n'.
A 'default n' can make sense e.g. in a Kconfig.defconfig file, if you
want to override a 'default y' on the base definition of the symbol. It
isn't used like that on any of these symbols though.
Also simplify the default on STDOUT_CONSOLE. Defaults can be arbitrary
expressions, not just fixed values.
Signed-off-by: Ulf Magnusson <Ulf.Magnusson@nordicsemi.no>
The charmap table used by strncasecmp() not only used precious 256
bytes of ROM, it also had wrong mappings outside the ASCII range
(123..218).
Rewrite strncasecmp() to call tolower() instead; might be a tiny wee
little bit slower than the current version, but it's not used in any
performance-sensitive parts of the code to justify the waste.
This reduces the ROM footprint for the ws_echo_server sample by ~224
bytes.
Signed-off-by: Leandro Pereira <leandro.pereira@intel.com>
Both variables were used (with the same value) interchangeably
throughout CMake files and per the discussion in GH issue,
ZEPHYR_BASE is preferred.
Also add a comment with explanation of one vs. the other.
Tested by building hello_world for several boards ensuring no errors.
Fixes#7173.
Signed-off-by: Alex Tereschenko <alext.mkrs@gmail.com>
lib/libc/minimal/source/CMakeLists.txt and
lib/libc/minimal/source/stdout/CMakeLists.txt was introduced in
12f8f7616 but it is not used by the build system. CMakeLists.txt in
the parent dir lib/libc/minimal/CMakeLists.txt adds C files to the
target with the lines like:
${CMAKE_CURRENT_SOURCE_DIR}/source/stdlib/atoi.c
${CMAKE_CURRENT_SOURCE_DIR}/source/stdlib/strtol.c
To make other empty CMakeLists.txt explicit, this commit adds a
comment line to them.
Signed-off-by: Yasushi SHOJI <y-shoji@ispace-inc.com>
'default N' should have been 'default n', though they happen to have the
same effect here, due to undefined Kconfig symbols ('N') evaluating to
'n' in a boolean sense.
Kconfig bool symbols implicitly default to 'n', so remove the default
rather than fixing it.
Signed-off-by: Ulf Magnusson <Ulf.Magnusson@nordicsemi.no>
The minimal libc source files have been added to 'app'. The Zephyr
build system should not be adding source files to the 'app' library
unless necessary.
This patch creates a new Zephyr CMake Library in lib/libc/minimal and
adds the sources to it.
Signed-off-by: Sebastian Bøe <sebastian.boe@nordicsemi.no>
Use k_uptime_get() to compute both tv_sec and tv_nsec members
of timespec structure.
Fixes#8009
Signed-off-by: Ramakrishna Pallala <ramakrishna.pallala@intel.com>
Make sure the name string is NULL terminated in the readdir().
CID: 186037
Fixes Issue #7733
Signed-off-by: Ramakrishna Pallala <ramakrishna.pallala@intel.com>
When we introduced NEWLIB_LIBC_ALIGNED_HEAP_SIZE in commit
42a2c96422. We accidently had the Kconfig
symbol depend on CONFIG_MPU_REQUIRES_POWER_OF_TWO_ALIGNMENT the leading
'CONFIG_' shouldn't exist.
Signed-off-by: Kumar Gala <kumar.gala@linaro.org>
The pthread mutex changes went in with an adaptation to build with the
new wait queue API, but they did it by using the old dlist hooks
directly through typecasting and union assignment. That... is sort of
the opposite of the intent to having the new API be abstracted. The
pthread code worked, but failed once wait queues (on x86) stopped
being dlists.
Simple fix once I saw the problem, anyway.
Signed-off-by: Andy Ross <andrew.j.ross@intel.com>
The scheduler priq implementation was taking advantage of a subtle
behavior of the way the tree presents the order of its arguments (the
node being inserted is always first). But it turns out the tree got
that wrong in one spot.
As this was subtle voodoo to begin with, it should have been
documented first. Similarly add a little code to the test case to
guarantee this in the future.
Signed-off-by: Andy Ross <andrew.j.ross@intel.com>
This constant should be defined in limits.h. Define it in limits.h in
the minimal libc, and use the definition found in newlib's includes.
Values in newlib includes range from 1024 to 4096.
The rationale is that all code should use the same value; having
buffers specified with different sizes will lead to interoperability
and out of bounds array writes.
Signed-off-by: Leandro Pereira <leandro.pereira@intel.com>
Add IEEE 1003.1 Posix Style file system API support.
These API's will internally use corresponding Zephyr
File System API's.
Signed-off-by: Ramakrishna Pallala <ramakrishna.pallala@intel.com>
There were multiple spots where code was using the _wait_q_t
abstraction as a synonym for a dlist and doing direct list management
on them with the dlist APIs. Refactor _wait_q_t into a proper opaque
struct (not a typedef for sys_dlist_t) and write a simple wrapper API
for the existing usages. Now replacement of wait_q with a different
data structure is much cleaner.
Note that there were some SYS_DLIST_FOR_EACH_SAFE loops in mailbox.c
that got replaced by the normal/non-safe macro. While these loops do
mutate the list in the code body, they always do an early return in
those circumstances instead of returning into the macro'd for() loop,
so the _SAFE usage was needless.
Signed-off-by: Andy Ross <andrew.j.ross@intel.com>
Works mostly like the list enumeration macros. Implemented by fairly
clever alloca trickery and some subtle "next node" logic. More
convenient for many uses, can be early-exited, but has somewhat larger
code size than rb_walk().
Signed-off-by: Andy Ross <andrew.j.ross@intel.com>
The implementation of fwrite() in the minimal libc does not increment
the source pointer, and thus always print the same character.
Signed-off-by: Florian Vaussard <florian.vaussard@gmail.com>
pthread_attr_init() should not return EBUSY as per POSIX spec
so fixed this by return ENOMEM if the attr pointer is NULL.
Also fixed the attribute initialization logic by copying the
init_pthread_attrs to the attr.
Fixes Issue #7480
Signed-off-by: Ramakrishna Pallala <ramakrishna.pallala@intel.com>
The _thread_entry() is not really a part of the kernel but a part of
the zephyr's C runtime support library. Hence moving just the
function to lib/thread_entry.c
Signed-off-by: Adithya Baglody <adithya.nagaraj.baglody@intel.com>
MPU devices that enforce power-of-two alignment now
specify the size of the buffer used for the newlib heap.
This buffer will be properly aligned and a pointer
exposed in a kernel header, such that it can be added
to a user thread's memory domain configuration if
necessary.
MPU devices that don't have these restrictions allocate
the heap as normal.
In all cases, if an MPU/MMU region needs to be programmed,
the z_newlib_get_heap_bounds() API will return the necessary
information.
Given how precious MPU regions are, no automatic programming
of the MPU is done; applications will need to do this as
needed in their memory domain configurations.
On x86, the x86 MMU-specific code has been moved to arch/x86
using the new z_newlib_get_heap_bounds() API.
Fixes: #6814
Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
Newlib uses any RAM between _end and the bounds of physical
RAM for the _sbrk() heap. Set up a user-writable region
so that this works properly on x86.
Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
Calling POSIX exit() function in Zephyr w/newlib leads to printing
"exit" to stdout followed by infinite loop. That message was
printed without a newline though, leading to confusing artifacts
in the console output.
Signed-off-by: Paul Sokolovsky <paul.sokolovsky@linaro.org>
This trades a little bit over 40 bytes (on x86) of text for a lot of
savings in rodata. This is accomplished by using bitfields to pack the
field name length, offset, alignment, and the type tag into a single
32-bit unsigned integer instead of scattering this information into
four different integers.
Signed-off-by: Leandro Pereira <leandro.pereira@intel.com>
Fix potential overflow of interger expression for by fixing
variable type to s64_t.
CID: 185275
Signed-off-by: Ramakrishna Pallala <ramakrishna.pallala@intel.com>
The POSIX layer had a simple ready_one_thread() utility. Move this to
the scheduler API (with a prepended underscore -- it's an internal
API) so that it can be synchronized along with the rest of the
scheduler.
Signed-off-by: Andy Ross <andrew.j.ross@intel.com>
Almost everywhere this was called, it was immediately followed by
_abort_thread_timeout(), for obvious reasons. The only exceptions
were in timeout and k_timer expiration (unifying these two would be
another good cleanup), which are peripheral parts of the scheduler and
can plausibly use a more "internal" API.
So make the common case the default, and expose the old behavior as
_unpend_thread_no_timeout(). (Along with identical changes for
_unpend_first_thread) Saves code bytes and simplifies scheduler
surface area for future synchronization work.
Signed-off-by: Andy Ross <andrew.j.ross@intel.com>
Originally, pthread_cond_signal() was written to yield even in
circumstances where the current thread is at a cooperative priority
and would not expect to be context-switched out until it blocks. This
makes sense, as in most cases you want the newly signaled thread to
get a chance to run as soon as possible.
On further reflection (and also because it complicates the scheduler),
I think that's wrong. The point to cooperative scheduling is that it
allows the cooperative code to make synchronization assumptions about
exactly when it might yield to other threads, and having arbitrary
APIs be "preemption points" like this complicates that analysis
significantly.
Use _reschedule() like other code does.
Signed-off-by: Andy Ross <andrew.j.ross@intel.com>
Now that other work has eliminated the two cases where we had to do a
reschedule "but yield even if we are cooperative", we can squash both
down to a single _reschedule() function which does almost exactly what
legacy _Swap() did, but wrapped as a proper scheduler API.
Signed-off-by: Andy Ross <andrew.j.ross@intel.com>
Recent changes have eliminated most use of _Swap() in favor of higher
level scheduler abstractions. We can remove the header too.
Signed-off-by: Andy Ross <andrew.j.ross@intel.com>
Everywhere the current thread is pended, the code is going to have to
do a _Swap() soon afterward, yet the scheduler API exposed these as
separate steps. Unify this pattern everywhere it appears, which saves
some code bytes and gets _Swap() out of the general scheduler API at
zero cost.
Signed-off-by: Andy Ross <andrew.j.ross@intel.com>
There was a somewhat promiscuous pattern in the kernel where IPC
mechanisms would do something that might effect the current thread
choice, then check _must_switch_threads() (or occasionally
__must_switch_threads -- don't ask, the distinction is being replaced
by real English words), sometimes _is_in_isr() (but not always, even
in contexts where that looks like it would be a mistake), and then
call _Swap() if everything is OK, otherwise releasing the irq_lock().
Sometimes this was done directly, sometimes via the inverted test,
sometimes (poll, heh) by doing the test when the thread state was
modified and then needlessly passing the result up the call stack to
the point of the _Swap().
And some places were just calling _reschedule_threads(), which did all
this already.
Unify all this madness. The old _reschedule_threads() function has
split into two variants: _reschedule_yield() and
_reschedule_noyield(). The latter is the "normal" one that respects
the cooperative priority of the current thread (i.e. it won't switch
out even if there is a higher priority thread ready -- the current
thread has to pend itself first), the former is used in the handful of
places where code was doing a swap unconditionally, just to preserve
precise behavior across the refactor. I'm not at all convinced it
should exist...
Signed-off-by: Andy Ross <andrew.j.ross@intel.com>
The compiler can remove the NULL check since the dereference happens
before it (and assume that the pointer is always valid).
Coverity-Id: 185281
Signed-off-by: Leandro Pereira <leandro.pereira@intel.com>
Returns true if the specified node is in the tree. Allows the tree to
be used for "set" style semantics along with a lessthan_fn that simply
compares the nodes by their address.
Signed-off-by: Andy Ross <andrew.j.ross@intel.com>
A balanced tree implementation for Zephyr as we grow into bigger
regimes where simpler data structures aren't appropriate.
This implements an intrusive balanced tree that guarantees O(log2(N))
runtime for all operations and amortized O(1) behavior for creation
and destruction of whole trees. The algorithms and naming are
conventional per existing academic and didactic implementations, c.f.:
https://en.wikipedia.org/wiki/Red%E2%80%93black_tree
The implementation is size-optimized to prioritize runtime memory
usage. The data structure is intrusive, which is to say the struct
rbnode handle is intended to be placed in a separate struct the same
way other such structures (e.g. Zephyr's dlist list) and requires no
data pointer to be stored in the node. The color bit is unioned with
a pointer (fairly common for such libraries). Most notably, there is
no "parent" pointer stored in the node, the upper structure of the
tree being generated dynamically via a stack as the tree is recursed.
So the overall memory overhead of a node is just two pointers,
identical with a doubly-linked list.
Code size above dlist is about 2-2.5k on most architectures, which is
significant by Zephyr standards but probably still worthwhile in many
situations.
Signed-off-by: Andy Ross <andrew.j.ross@intel.com>
Move posix layer from 'kernel' to 'lib' folder as it is not
a core kernel feature.
Fixed posix header file dependencies as part of the move and
also removed NEWLIBC related macros from posix headers.
Signed-off-by: Ramakrishna Pallala <ramakrishna.pallala@intel.com>
We would like to offer the capability to have memory pool heap data
structures that are usable from user mode threads. The current
k_mem_pool implementation uses IRQ locking and system-wide membership
lists that make it incompatible with user mode constraints.
However, much of the existing memory pool code can be abstracted to some
common functions that are used by both k_mem_pool and the new
sys_mem_pool implementations.
The sys_mem_pool implementation has the following differences:
* The alloc/free APIs work directly with pointers, no internal memory
block structures are exposed to the end user. A pointer to the source
pool is provided for allocation, but freeing memory just requires the
pointer and nothing else.
* k_mem_pool uses IRQ locks and required very fine-grained locking in
order to not affect system latency. sys_mem_pools just use a semaphore
to protect the pool data structures at the API level, since there aren't
implications for system responsiveness with this kind of concurrency
control.
* sys_mem_pools do not support the notion of timeouts for requesting
memory.
* sys_mem_pools are specified at compile time with macros, just like
kernel memory pools. Alternative forms of specification at runtime
will be a later enhancement.
Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
