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Add wasm32-unknown-wasi target to mlton
This requires: - WASI SDK: https://github.com/WebAssembly/wasi-sdk - wasmtime: https://wasmtime.dev/
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,67 @@ | ||
| #include "platform.h" | ||
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| #include "platform/mremap.c" | ||
| #include "platform/use-mmap.c" | ||
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| /* WASI only implements a subset of POSIX, and given how it works it doesn't | ||
| * make too much sense to try too hard to emulate missing functionality. | ||
| * | ||
| * Every function needed by the runtime library and not provided by WASI | ||
| * is declared in wasi.h, but only a tiny number are implemented here. | ||
| * | ||
| * This means that any use of missing runtime functions from SML code will | ||
| * result in linker errors at the end of compilation, rather than as a runtime | ||
| * error later. | ||
| * | ||
| * The functions in this file are the bare minimum to get the GC working, | ||
| * needed by every program compiled by MLton. | ||
| */ | ||
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| size_t GC_pageSize (void) { | ||
| long int pageSize; | ||
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| pageSize = sysconf (_SC_PAGESIZE); | ||
| if (pageSize < 0) | ||
| diee ("GC_pageSize error: sysconf (_SC_PAGESIZE) failed"); | ||
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| return (size_t)pageSize; | ||
| } | ||
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| uintmax_t GC_physMem (void) { | ||
| /* WASI doesn't provide a way to query actual physical memory, so pick | ||
| * a reasonable amount (as of Feb 2024). | ||
| */ | ||
| return 1 << 30; /* 1 GiB */ | ||
| } | ||
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| void* GC_extendHead (void *base, size_t length) { | ||
| return mmapAnon (base, length); | ||
| } | ||
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| void* GC_extendTail (void *base, size_t length) { | ||
| return mmapAnon (base, length); | ||
| } | ||
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| void GC_displayMem (void) { | ||
| printf ("GC_displayMem() not implemented on WASI\n"); | ||
| } | ||
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| void GC_diskBack_close (__attribute__ ((unused)) void *data) { | ||
| die ("Disk-backed heap not supported on WASI"); | ||
| } | ||
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| void GC_diskBack_read (__attribute__ ((unused)) void *data, | ||
| __attribute__ ((unused)) pointer buf, | ||
| __attribute__ ((unused)) size_t size) { | ||
| die ("Disk-backed heap not supported on WASI"); | ||
| } | ||
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| void *GC_diskBack_write (__attribute__ ((unused)) pointer buf, | ||
| __attribute__ ((unused)) size_t size) { | ||
| die ("Disk-backed heap not supported on WASI"); | ||
| } | ||
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| int sigemptyset (sigset_t *set) { | ||
| *set = (sigset_t) 0; | ||
| return 0; | ||
| } |
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