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runtime,cmd/ld: on darwin, create theads using libc

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Replace thread creation with calls to the pthread
library in libc.

Update #17490

Change-Id: I1e19965c45255deb849b059231252fc6a7861d6c
Reviewed-on: https://go-review.googlesource.com/108679
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
This commit is contained in:
Keith Randall 2018-04-23 07:30:32 -07:00
parent 743fd9171f
commit b7f1777a70
26 changed files with 1008 additions and 210 deletions
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7
src/cmd/link/internal/ld/lib.go
View file

@ -387,7 +387,7 @@ func (ctxt *Link) loadlib() {
toc.Type = sym.SDYNIMPORT
}
if ctxt.LinkMode == LinkExternal && !iscgo && ctxt.LibraryByPkg["runtime/cgo"] == nil {
if ctxt.LinkMode == LinkExternal && !iscgo && ctxt.LibraryByPkg["runtime/cgo"] == nil && !(objabi.GOOS == "darwin" && (ctxt.Arch.Family == sys.AMD64 || ctxt.Arch.Family == sys.I386)) {
// This indicates a user requested -linkmode=external.
// The startup code uses an import of runtime/cgo to decide
// whether to initialize the TLS. So give it one. This could
@ -1824,10 +1824,11 @@ func stkcheck(ctxt *Link, up *chain, depth int) int {
// should never be called directly.
// onlyctxt.Diagnose the direct caller.
// TODO(mwhudson): actually think about this.
// TODO(khr): disabled for now. Calls to external functions can only happen on the g0 stack.
// See the trampolines in src/runtime/sys_darwin_$ARCH.go.
if depth == 1 && s.Type != sym.SXREF && !ctxt.DynlinkingGo() &&
ctxt.BuildMode != BuildModeCArchive && ctxt.BuildMode != BuildModePIE && ctxt.BuildMode != BuildModeCShared && ctxt.BuildMode != BuildModePlugin {
Errorf(s, "call to external function")
//Errorf(s, "call to external function")
}
return -1
}