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zephyr: Enable WASI support for file system and sockets on zephyr (#3633)
This work also implements the WASI support on Zephyr.
* Added os_is_* methods for stdin/stdout/stderr. Fixed issues in os_renameat
* Zephyr platform fixes for WASI sockets Addressed numerous of build warnings on Zephyr
* Updated `os_writev` to use `fwrite` for STDOUT/STDERR
* Temporarily reverted change to `writev` to work around an issue.
* Fixes: fstat, fstatat, and unlink
* Add initial support for directories in os_openat. Partial implementation — just avoids a hard fault.
* Directory support WIP. readdir works but I think we have a memory leak somewhere
* Fix: always use standard stream fds. Fix unlinkat and renameat. fd 0, 1, and 2 will always be supplied for standard streams. Unlinkat and renameat work exclusively based on supplied paths.
* Fix: use macro for free()
* Added a temporary workaround for issue identified in PR#4377
* Fixed reference to file descriptor and cleaned up dead/commented code.
Note that some comments haven't been addressed and will be fixed in the
further patches.
Signed-off-by: Stephen Berard <stephen.berard@outlook.com>
Co-authored-by: Lucas Abad <149054121+lucasAbadFr@users.noreply.github.com>
Co-authored-by: Stephen Berard <srberard@users.noreply.github.com>
Co-authored-by: Dan Kouba <dan@atym.io>
For shared memory, the max memory size must be defined in advanced. Re-allocation
for growing memory can't be used as it might change the base address, therefore when
OS_ENABLE_HW_BOUND_CHECK is enabled the memory is mmaped, and if the flag is
disabled, the memory is allocated. This change introduces a flag that allows users to use
mmap for reserving memory address space even if the OS_ENABLE_HW_BOUND_CHECK
is disabled.
Add an extra argument `os_file_handle file` for `os_mmap` to support
mapping file from a file fd, and remove `os_get_invalid_handle` from
`posix_file.c` and `win_file.c`, instead, add it in the `platform_internal.h`
files to remove the dependency on libc-wasi.
Signed-off-by: Huang Qi <huangqi3@xiaomi.com>
To allow non-POSIX platforms such as Windows to support WASI libc
filesystem functionality, create a set of wrapper functions which provide a
platform-agnostic interface to interact with the host filesystem. For now,
the Windows implementation is stubbed but this will be implemented
properly in a future PR. There are no functional changes in this change,
just a reorganization of code to move any direct POSIX references out of
posix.c in the libc implementation into posix_file.c under the shared
POSIX sources.
See https://github.com/bytecodealliance/wasm-micro-runtime/issues/2495 for a
more detailed overview of the plan to port the WASI libc filesystem to Windows.
Send a signal whose handler is no-op to a blocking thread to wake up
the blocking syscall with either EINTR equivalent or partial success.
Unlike the approach taken in the `dev/interrupt_block_insn` branch (that is,
signal + longjmp similarly to `OS_ENABLE_HW_BOUND_CHECK`), this PR
does not use longjmp because:
* longjmp from signal handler doesn't work on nuttx
refer to https://github.com/apache/nuttx/issues/10326
* the singal+longjmp approach may be too difficult for average programmers
who might implement host functions to deal with
See also https://github.com/bytecodealliance/wasm-micro-runtime/issues/1910
Build wasi-libc library on Windows since libuv may be not supported. This PR is a first step
to make it working, but there's still a number of changes to get it fully working.
