50d504cfdd
This narrows to what the `internal/platform` package supports, which is currently bound by Go SDK source that include `Mprotect` or windows. Ex. `zsyscall_linux_amd64.go` includes `Mprotect`, but `zsyscall_freebsd_amd64.go` does not. This should prevent errors like below, by allowing `wazero.NewRuntime()` to properly fallback to the interpreter. ``` .../mmap.go:74:16: undefined: syscall.Mprotect ``` A later change will implement FreeBSD. This is just here to ensure users don't crash on unexpected OS. See #607 Signed-off-by: Adrian Cole <adrian@tetrate.io>
50 lines
1.2 KiB
Go
50 lines
1.2 KiB
Go
// Package platform includes runtime-specific code needed for the compiler or otherwise.
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//
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// Note: This is a dependency-free alternative to depending on parts of Go's x/sys.
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// See /RATIONALE.md for more context.
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package platform
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import (
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"errors"
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"runtime"
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)
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// IsSupported is exported for tests and includes constraints here and also the assembler.
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func IsSupported() bool {
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switch runtime.GOOS {
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case "darwin", "windows", "linux":
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default:
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return false
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}
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switch runtime.GOARCH {
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case "amd64", "arm64":
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default:
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return false
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}
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return true
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}
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// MmapCodeSegment copies the code into the executable region and returns the byte slice of the region.
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//
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// See https://man7.org/linux/man-pages/man2/mmap.2.html for mmap API and flags.
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func MmapCodeSegment(code []byte) ([]byte, error) {
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if len(code) == 0 {
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panic(errors.New("BUG: MmapCodeSegment with zero length"))
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}
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if runtime.GOARCH == "amd64" {
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return mmapCodeSegmentAMD64(code)
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} else {
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return mmapCodeSegmentARM64(code)
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}
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}
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// MunmapCodeSegment unmaps the given memory region.
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func MunmapCodeSegment(code []byte) error {
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if len(code) == 0 {
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panic(errors.New("BUG: MunmapCodeSegment with zero length"))
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}
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return munmapCodeSegment(code)
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}
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