e0f69f36ea
Previously the libgo Makefile explicitly listed the set of files to
compile for each package. For packages that use build tags, this
required a lot of awkward automake conditionals in the Makefile.
This CL changes the build to look at the build tags in the files.
The new shell script libgo/match.sh does the matching. This required
adjusting a lot of build tags, and removing some files that are never
used. I verified that the exact same sets of files are compiled on
amd64 GNU/Linux. I also tested the build on i386 Solaris.
Writing match.sh revealed some bugs in the build tag handling that
already exists, in a slightly different form, in the gotest shell
script. This CL fixes those problems as well.
The old code used automake conditionals to handle systems that were
missing strerror_r and wait4. Rather than deal with those in Go, those
functions are now implemented in runtime/go-nosys.c when necessary, so
the Go code can simply assume that they exist.
The os testsuite looked for dir_unix.go, which was never built for gccgo
and has now been removed. I changed the testsuite to look for dir.go
instead.
Reviewed-on: https://go-review.googlesource.com/25546
From-SVN: r239189
44 lines
1.5 KiB
Go
44 lines
1.5 KiB
Go
// Copyright 2015 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.
|
|
|
|
// +build ignore
|
|
|
|
// Support for memory sanitizer. See runtime/cgo/mmap.go.
|
|
|
|
// +build linux,amd64
|
|
|
|
package runtime
|
|
|
|
import "unsafe"
|
|
|
|
// _cgo_mmap is filled in by runtime/cgo when it is linked into the
|
|
// program, so it is only non-nil when using cgo.
|
|
//go:linkname _cgo_mmap _cgo_mmap
|
|
var _cgo_mmap unsafe.Pointer
|
|
|
|
func mmap(addr unsafe.Pointer, n uintptr, prot, flags, fd int32, off uint32) unsafe.Pointer {
|
|
if _cgo_mmap != nil {
|
|
// Make ret a uintptr so that writing to it in the
|
|
// function literal does not trigger a write barrier.
|
|
// A write barrier here could break because of the way
|
|
// that mmap uses the same value both as a pointer and
|
|
// an errno value.
|
|
// TODO: Fix mmap to return two values.
|
|
var ret uintptr
|
|
systemstack(func() {
|
|
ret = callCgoMmap(addr, n, prot, flags, fd, off)
|
|
})
|
|
return unsafe.Pointer(ret)
|
|
}
|
|
return sysMmap(addr, n, prot, flags, fd, off)
|
|
}
|
|
|
|
// sysMmap calls the mmap system call. It is implemented in assembly.
|
|
func sysMmap(addr unsafe.Pointer, n uintptr, prot, flags, fd int32, off uint32) unsafe.Pointer
|
|
|
|
// cgoMmap calls the mmap function in the runtime/cgo package on the
|
|
// callCgoMmap calls the mmap function in the runtime/cgo package
|
|
// using the GCC calling convention. It is implemented in assembly.
|
|
func callCgoMmap(addr unsafe.Pointer, n uintptr, prot, flags, fd int32, off uint32) uintptr
|