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opt / golang / 1.19.4 / src / cmd / link / internal / ld /

📁 ..
📄 ar.go(5.38 KB)
📄 asmb.go(5.21 KB)
📄 config.go(7.54 KB)
📄 data.go(89.78 KB)
📄 data_test.go(2.32 KB)
📄 deadcode.go(15.66 KB)
📄 deadcode_test.go(1.34 KB)
📄 decodesym.go(9.98 KB)
📄 dwarf.go(72.83 KB)
📄 dwarf_test.go(46.02 KB)
📄 elf.go(59.18 KB)
📄 elf_test.go(2.75 KB)
📄 errors.go(1.91 KB)
📄 execarchive.go(901 B)
📄 execarchive_noexec.go(343 B)
📄 fallocate_test.go(1.64 KB)
📄 go.go(11.84 KB)
📄 go_test.go(2.68 KB)
📄 heap.go(960 B)
📄 heap_test.go(1.87 KB)
📄 issue33808_test.go(792 B)
📄 ld.go(8.08 KB)
📄 ld_test.go(8.16 KB)
📄 lib.go(76.84 KB)
📄 link.go(5.13 KB)
📄 macho.go(43.02 KB)
📄 macho_combine_dwarf.go(13.11 KB)
📄 main.go(14.01 KB)
📄 nooptcgolink_test.go(738 B)
📄 outbuf.go(8.05 KB)
📄 outbuf_darwin.go(1.48 KB)
📄 outbuf_linux.go(304 B)
📄 outbuf_mmap.go(1.51 KB)
📄 outbuf_nofallocate.go(342 B)
📄 outbuf_nommap.go(805 B)
📄 outbuf_notdarwin.go(292 B)
📄 outbuf_test.go(2.21 KB)
📄 outbuf_windows.go(2.28 KB)
📄 pcln.go(28.96 KB)
📄 pe.go(45.98 KB)
📄 stackcheck.go(11.86 KB)
📄 stackcheck_test.go(2.26 KB)
📄 sym.go(3.89 KB)
📄 symtab.go(29.49 KB)
📄 target.go(3.77 KB)
📁 testdata
📄 typelink.go(1.87 KB)
📄 util.go(2.46 KB)
📄 xcoff.go(51.88 KB)

Editing: outbuf_darwin.go

// Copyright 2020 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

//go:build darwin && go1.12
// +build darwin,go1.12

package ld

import (
	"syscall"
	"unsafe"
)

// Implemented in the syscall package.
//
//go:linkname fcntl syscall.fcntl
func fcntl(fd int, cmd int, arg int) (int, error)

func (out *OutBuf) fallocate(size uint64) error {
	stat, err := out.f.Stat()
	if err != nil {
		return err
	}
	// F_PEOFPOSMODE allocates from the end of the file, so we want the size difference.
	// Apparently, it uses the end of the allocation, instead of the logical end of the
	// the file.
	cursize := uint64(stat.Sys().(*syscall.Stat_t).Blocks * 512) // allocated size
	if size <= cursize {
		return nil
	}

store := &syscall.Fstore_t{
		Flags:   syscall.F_ALLOCATEALL,
		Posmode: syscall.F_PEOFPOSMODE,
		Offset:  0,
		Length:  int64(size - cursize),
	}

_, err = fcntl(int(out.f.Fd()), syscall.F_PREALLOCATE, int(uintptr(unsafe.Pointer(store))))
	return err
}

func (out *OutBuf) purgeSignatureCache() {
	// Apparently, the Darwin kernel may cache the code signature at mmap.
	// When we mmap the output buffer, it doesn't have a code signature
	// (as we haven't generated one). Invalidate the kernel cache now that
	// we have generated the signature. See issue #42684.
	syscall.Syscall(syscall.SYS_MSYNC, uintptr(unsafe.Pointer(&out.buf[0])), uintptr(len(out.buf)), syscall.MS_INVALIDATE)
	// Best effort. Ignore error.
}

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Editing: outbuf_darwin.go

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