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Abstract POSIX filesystem functions (#2585)

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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.
This commit is contained in:
zoraaver
2023-10-19 12:19:39 +01:00
committed by GitHub
parent 5fd530610a
commit fa5e9d72b0
40 changed files with 3805 additions and 2566 deletions
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25
core/iwasm/include/wasm_export.h
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@ -431,26 +431,31 @@ wasm_runtime_get_module_hash(wasm_module_t module);
* @param env_count The number of elements in env.
* @param argv The list of command line arguments.
* @param argc The number of elements in argv.
* @param stdinfd The host file descriptor to back WASI STDIN_FILENO.
* If -1 is specified, STDIN_FILENO is used.
* @param stdoutfd The host file descriptor to back WASI STDOUT_FILENO.
* If -1 is specified, STDOUT_FILENO is used.
* @param stderrfd The host file descriptor to back WASI STDERR_FILENO.
* If -1 is specified, STDERR_FILENO is used.
* @param stdin_handle The raw host handle to back WASI STDIN_FILENO.
* If an invalid handle is specified (e.g. -1 on POSIX,
* INVALID_HANDLE_VALUE on Windows), the platform default
* for STDIN is used.
* @param stdoutfd The raw host handle to back WASI STDOUT_FILENO.
* If an invalid handle is specified (e.g. -1 on POSIX,
* INVALID_HANDLE_VALUE on Windows), the platform default
* for STDOUT is used.
* @param stderrfd The raw host handle to back WASI STDERR_FILENO.
* If an invalid handle is specified (e.g. -1 on POSIX,
* INVALID_HANDLE_VALUE on Windows), the platform default
* for STDERR is used.
*/
WASM_RUNTIME_API_EXTERN void
wasm_runtime_set_wasi_args_ex(wasm_module_t module,
const char *dir_list[], uint32_t dir_count,
const char *map_dir_list[], uint32_t map_dir_count,
const char *env[], uint32_t env_count,
char *argv[], int argc,
int stdinfd, int stdoutfd, int stderrfd);
char *argv[], int argc, int64_t stdinfd,
int64_t stdoutfd, int64_t stderrfd);
/**
* Set WASI parameters.
*
* Same as wasm_runtime_set_wasi_args_ex with stdinfd = -1, stdoutfd = -1,
* stderrfd = -1.
* Same as wasm_runtime_set_wasi_args_ex but with default stdio handles
*/
WASM_RUNTIME_API_EXTERN void
wasm_runtime_set_wasi_args(wasm_module_t module,