d63813a830
Ensure that stdio device modes are consistent with the given file descriptors by stat'ing, instead of returning mocks. * Use `Stat()` on `poll_oneoff()` too, instead of `IsTerminal()`, thus avoiding a useless syscall. * Delete leftover type decl `fileModeStat`. * Remove IsPlatform() * Propagate error when Stat() fails Signed-off-by: Edoardo Vacchi <evacchi@users.noreply.github.com>
54 lines
1.4 KiB
Go
54 lines
1.4 KiB
Go
// Package platform includes runtime-specific code needed for the compiler or otherwise.
|
|
//
|
|
// Note: This is a dependency-free alternative to depending on parts of Go's x/sys.
|
|
// See /RATIONALE.md for more context.
|
|
package platform
|
|
|
|
import (
|
|
"errors"
|
|
"io"
|
|
"runtime"
|
|
"strings"
|
|
)
|
|
|
|
// TODO: IsAtLeastGo120
|
|
var IsGo120 = strings.Contains(runtime.Version(), "go1.20")
|
|
|
|
// archRequirementsVerified is set by platform-specific init to true if the platform is supported
|
|
var archRequirementsVerified bool
|
|
|
|
var _zero uintptr
|
|
|
|
// CompilerSupported is exported for tests and includes constraints here and also the assembler.
|
|
func CompilerSupported() bool {
|
|
switch runtime.GOOS {
|
|
case "darwin", "windows", "linux", "freebsd":
|
|
default:
|
|
return false
|
|
}
|
|
|
|
return archRequirementsVerified
|
|
}
|
|
|
|
// MmapCodeSegment copies the code into the executable region and returns the byte slice of the region.
|
|
//
|
|
// See https://man7.org/linux/man-pages/man2/mmap.2.html for mmap API and flags.
|
|
func MmapCodeSegment(code io.Reader, size int) ([]byte, error) {
|
|
if size == 0 {
|
|
panic(errors.New("BUG: MmapCodeSegment with zero length"))
|
|
}
|
|
if runtime.GOARCH == "amd64" {
|
|
return mmapCodeSegmentAMD64(code, size)
|
|
} else {
|
|
return mmapCodeSegmentARM64(code, size)
|
|
}
|
|
}
|
|
|
|
// MunmapCodeSegment unmaps the given memory region.
|
|
func MunmapCodeSegment(code []byte) error {
|
|
if len(code) == 0 {
|
|
panic(errors.New("BUG: MunmapCodeSegment with zero length"))
|
|
}
|
|
return munmapCodeSegment(code)
|
|
}
|