Unaligned accesses on x86(_64) are allowed, but slow. However, some host systems
might not be that forgiving. Aligning the stack to sizeof(uintptr_t) should be
a pretty safe safety measure.
And with this done, all casts of the stack pointer that increase alignment
requirements are now intermediately casted to `uintptr_t` to silence
warnings from -Wcast-align - after all the stacks are now manually aligned.
On `native` the functions stdio_read() / stdio_write() were not
used.
Those functions are intended for alternative stdio implementations.
As a result, no alternative stdio could be used on `native`.
To fix this, call the functions in `_native_read()` / `_native_write()`
when dealing with stdio fds.
select() can not listen to POLLPRI events which are used by the
Kernel's GPIO API.
In preparation for that, rewrite async_read() to use poll() instead
of select().
Without this change a RIOT application compiled with all-asan will
segfault as RIOT provides its own malloc by default. Add a define for
disabling custom malloc, calloc and realloc implementations and use it
when compiling with all-asan.
External packages that may use fprintf(stderr, ...) for logging will
link directly to the libc version of it, and for some reason that
results in the application crashing.
In order to make native behave more similar to other platforms, it should also use TLSF's dynamic memory allocation if included. It will still fall back to the system's malloc implementation when building for use with valgrind, to leverage its memory leak detection mechanisms.
Instead of using differing integer types use kernel_pid_t for process
identifier. This type is introduced in a new header file to avoid
circular dependencies.
When using socket stdio, add option to replay what has been written to
stdout while not connected (`-r`).
The implementation is to simply use the existing log file (which is
implicitly created when the option is used), and read from it until
EOF upon reconnect.
closes#476
