runtime: fix vet complaints for solaris/amd64, illumos/amd64

Working toward making the tree vet-safe instead of having
so many exceptions in cmd/vet/all/whitelist.

This CL makes "go vet -unsafeptr=false runtime" happy for these GOOS/GOARCHes,
while keeping "GO_BUILDER_NAME=misc-vetall go tool dist test" happy too.

For #31916.

Change-Id: Ic64f7f4034695dd4c32c9b7f258960faf3742a83
Reviewed-on: https://go-review.googlesource.com/c/go/+/176103
Run-TryBot: Russ Cox <[email protected]>
Reviewed-by: Austin Clements <[email protected]>
Reviewed-by: Brad Fitzpatrick <[email protected]>

Author: rsc

src/cmd/vet/all/whitelist/illumos_amd64.txt

@@ -294,7 +294,7 @@ func semacreate(mp *m) {
 	_g_.m.scratch = mscratch{}
 	_g_.m.scratch.v[0] = unsafe.Sizeof(*sem)
 	_g_.m.libcall.args = uintptr(unsafe.Pointer(&_g_.m.scratch))
-	asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&_g_.m.libcall))
+	asmcgocall(unsafe.Pointer(&asmsysvicall6x), unsafe.Pointer(&_g_.m.libcall))
 	sem = (*semt)(unsafe.Pointer(_g_.m.libcall.r1))
 	if sem_init(sem, 0, 0) != 0 {
 		throw("sem_init")
@@ -315,7 +315,7 @@ func semasleep(ns int64) int32 {
 		_m_.scratch.v[0] = _m_.waitsema
 		_m_.scratch.v[1] = uintptr(unsafe.Pointer(&_m_.ts))
 		_m_.libcall.args = uintptr(unsafe.Pointer(&_m_.scratch))
-		asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&_m_.libcall))
+		asmcgocall(unsafe.Pointer(&asmsysvicall6x), unsafe.Pointer(&_m_.libcall))
 		if *_m_.perrno != 0 {
 			if *_m_.perrno == _ETIMEDOUT || *_m_.perrno == _EAGAIN || *_m_.perrno == _EINTR {
 				return -1
@@ -330,7 +330,7 @@ func semasleep(ns int64) int32 {
 		_m_.scratch = mscratch{}
 		_m_.scratch.v[0] = _m_.waitsema
 		_m_.libcall.args = uintptr(unsafe.Pointer(&_m_.scratch))
-		asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&_m_.libcall))
+		asmcgocall(unsafe.Pointer(&asmsysvicall6x), unsafe.Pointer(&_m_.libcall))
 		if _m_.libcall.r1 == 0 {
 			break
 		}
@@ -384,7 +384,7 @@ func doMmap(addr, n, prot, flags, fd, off uintptr) (uintptr, uintptr) {
 	libcall.fn = uintptr(unsafe.Pointer(&libc_mmap))
 	libcall.n = 6
 	libcall.args = uintptr(noescape(unsafe.Pointer(&addr)))
-	asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&libcall))
+	asmcgocall(unsafe.Pointer(&asmsysvicall6x), unsafe.Pointer(&libcall))
 	return libcall.r1, libcall.err
 }
 

src/cmd/vet/all/whitelist/solaris_amd64.txt

@@ -27,7 +27,10 @@ type mOS struct {
 
 type libcFunc uintptr
 
-var asmsysvicall6 libcFunc
+//go:linkname asmsysvicall6x runtime.asmsysvicall6
+var asmsysvicall6x libcFunc // name to take addr of asmsysvicall6
+
+func asmsysvicall6() // declared for vet; do NOT call
 
 //go:nosplit
 func sysvicall0(fn *libcFunc) uintptr {
@@ -51,7 +54,7 @@ func sysvicall0(fn *libcFunc) uintptr {
 	libcall.fn = uintptr(unsafe.Pointer(fn))
 	libcall.n = 0
 	libcall.args = uintptr(unsafe.Pointer(fn)) // it's unused but must be non-nil, otherwise crashes
-	asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&libcall))
+	asmcgocall(unsafe.Pointer(&asmsysvicall6x), unsafe.Pointer(&libcall))
 	if mp != nil {
 		mp.libcallsp = 0
 	}
@@ -81,7 +84,7 @@ func sysvicall1(fn *libcFunc, a1 uintptr) uintptr {
 	libcall.n = 1
 	// TODO(rsc): Why is noescape necessary here and below?
 	libcall.args = uintptr(noescape(unsafe.Pointer(&a1)))
-	asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&libcall))
+	asmcgocall(unsafe.Pointer(&asmsysvicall6x), unsafe.Pointer(&libcall))
 	if mp != nil {
 		mp.libcallsp = 0
 	}
@@ -110,7 +113,7 @@ func sysvicall2(fn *libcFunc, a1, a2 uintptr) uintptr {
 	libcall.fn = uintptr(unsafe.Pointer(fn))
 	libcall.n = 2
 	libcall.args = uintptr(noescape(unsafe.Pointer(&a1)))
-	asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&libcall))
+	asmcgocall(unsafe.Pointer(&asmsysvicall6x), unsafe.Pointer(&libcall))
 	if mp != nil {
 		mp.libcallsp = 0
 	}
@@ -139,7 +142,7 @@ func sysvicall3(fn *libcFunc, a1, a2, a3 uintptr) uintptr {
 	libcall.fn = uintptr(unsafe.Pointer(fn))
 	libcall.n = 3
 	libcall.args = uintptr(noescape(unsafe.Pointer(&a1)))
-	asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&libcall))
+	asmcgocall(unsafe.Pointer(&asmsysvicall6x), unsafe.Pointer(&libcall))
 	if mp != nil {
 		mp.libcallsp = 0
 	}
@@ -168,7 +171,7 @@ func sysvicall4(fn *libcFunc, a1, a2, a3, a4 uintptr) uintptr {
 	libcall.fn = uintptr(unsafe.Pointer(fn))
 	libcall.n = 4
 	libcall.args = uintptr(noescape(unsafe.Pointer(&a1)))
-	asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&libcall))
+	asmcgocall(unsafe.Pointer(&asmsysvicall6x), unsafe.Pointer(&libcall))
 	if mp != nil {
 		mp.libcallsp = 0
 	}
@@ -197,7 +200,7 @@ func sysvicall5(fn *libcFunc, a1, a2, a3, a4, a5 uintptr) uintptr {
 	libcall.fn = uintptr(unsafe.Pointer(fn))
 	libcall.n = 5
 	libcall.args = uintptr(noescape(unsafe.Pointer(&a1)))
-	asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&libcall))
+	asmcgocall(unsafe.Pointer(&asmsysvicall6x), unsafe.Pointer(&libcall))
 	if mp != nil {
 		mp.libcallsp = 0
 	}
@@ -226,7 +229,7 @@ func sysvicall6(fn *libcFunc, a1, a2, a3, a4, a5, a6 uintptr) uintptr {
 	libcall.fn = uintptr(unsafe.Pointer(fn))
 	libcall.n = 6
 	libcall.args = uintptr(noescape(unsafe.Pointer(&a1)))
-	asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&libcall))
+	asmcgocall(unsafe.Pointer(&asmsysvicall6x), unsafe.Pointer(&libcall))
 	if mp != nil {
 		mp.libcallsp = 0
 	}

src/runtime/os3_solaris.go

@@ -291,7 +291,7 @@ TEXT runtime·sigfwd(SB),NOSPLIT,$0-32
 // can also be called in cgo callback path without a g->m.
 TEXT runtime·usleep1(SB),NOSPLIT,$0
 	MOVL	usec+0(FP), DI
-	MOVQ	$runtime·usleep2(SB), AX // to hide from 6l
+	MOVQ	$usleep2<>(SB), AX // to hide from 6l
 
 	// Execute call on m->g0.
 	get_tls(R15)
@@ -328,7 +328,7 @@ noswitch:
 	RET
 
 // Runs on OS stack. duration (in µs units) is in DI.
-TEXT runtime·usleep2(SB),NOSPLIT,$0
+TEXT usleep2<>(SB),NOSPLIT,$0
 	LEAQ	libc_usleep(SB), AX
 	CALL	AX
 	RET

src/runtime/os_solaris.go

@@ -23,10 +23,14 @@ var (
 	libc_setuid,
 	libc_setpgid,
 	libc_syscall,
-	libc_wait4,
-	pipe1 libcFunc
+	libc_wait4 libcFunc
 )
 
+//go:linkname pipe1x runtime.pipe1
+var pipe1x libcFunc // name to take addr of pipe1
+
+func pipe1() // declared for vet; do NOT call
+
 //go:nosplit
 func syscall_sysvicall6(fn, nargs, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, err uintptr) {
 	call := libcall{
@@ -35,7 +39,7 @@ func syscall_sysvicall6(fn, nargs, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, err
 		args: uintptr(unsafe.Pointer(&a1)),
 	}
 	entersyscallblock()
-	asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
+	asmcgocall(unsafe.Pointer(&asmsysvicall6x), unsafe.Pointer(&call))
 	exitsyscall()
 	return call.r1, call.r2, call.err
 }
@@ -47,7 +51,7 @@ func syscall_rawsysvicall6(fn, nargs, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, e
 		n:    nargs,
 		args: uintptr(unsafe.Pointer(&a1)),
 	}
-	asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
+	asmcgocall(unsafe.Pointer(&asmsysvicall6x), unsafe.Pointer(&call))
 	return call.r1, call.r2, call.err
 }
 
@@ -62,7 +66,7 @@ func syscall_chdir(path uintptr) (err uintptr) {
 		n:    1,
 		args: uintptr(unsafe.Pointer(&path)),
 	}
-	asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
+	asmcgocall(unsafe.Pointer(&asmsysvicall6x), unsafe.Pointer(&call))
 	return call.err
 }
 
@@ -73,7 +77,7 @@ func syscall_chroot(path uintptr) (err uintptr) {
 		n:    1,
 		args: uintptr(unsafe.Pointer(&path)),
 	}
-	asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
+	asmcgocall(unsafe.Pointer(&asmsysvicall6x), unsafe.Pointer(&call))
 	return call.err
 }
 
@@ -97,7 +101,7 @@ func syscall_execve(path, argv, envp uintptr) (err uintptr) {
 		n:    3,
 		args: uintptr(unsafe.Pointer(&path)),
 	}
-	asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
+	asmcgocall(unsafe.Pointer(&asmsysvicall6x), unsafe.Pointer(&call))
 	return call.err
 }
 
@@ -114,7 +118,7 @@ func syscall_fcntl(fd, cmd, arg uintptr) (val, err uintptr) {
 		n:    3,
 		args: uintptr(unsafe.Pointer(&fd)),
 	}
-	asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
+	asmcgocall(unsafe.Pointer(&asmsysvicall6x), unsafe.Pointer(&call))
 	return call.r1, call.err
 }
 
@@ -125,7 +129,7 @@ func syscall_forkx(flags uintptr) (pid uintptr, err uintptr) {
 		n:    1,
 		args: uintptr(unsafe.Pointer(&flags)),
 	}
-	asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
+	asmcgocall(unsafe.Pointer(&asmsysvicall6x), unsafe.Pointer(&call))
 	return call.r1, call.err
 }
 
@@ -138,7 +142,7 @@ func syscall_gethostname() (name string, err uintptr) {
 		args: uintptr(unsafe.Pointer(&args[0])),
 	}
 	entersyscallblock()
-	asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
+	asmcgocall(unsafe.Pointer(&asmsysvicall6x), unsafe.Pointer(&call))
 	exitsyscall()
 	if call.r1 != 0 {
 		return "", call.err
@@ -154,7 +158,7 @@ func syscall_getpid() (pid, err uintptr) {
 		n:    0,
 		args: uintptr(unsafe.Pointer(&libc_getpid)), // it's unused but must be non-nil, otherwise crashes
 	}
-	asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
+	asmcgocall(unsafe.Pointer(&asmsysvicall6x), unsafe.Pointer(&call))
 	return call.r1, call.err
 }
 
@@ -165,18 +169,18 @@ func syscall_ioctl(fd, req, arg uintptr) (err uintptr) {
 		n:    3,
 		args: uintptr(unsafe.Pointer(&fd)),
 	}
-	asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
+	asmcgocall(unsafe.Pointer(&asmsysvicall6x), unsafe.Pointer(&call))
 	return call.err
 }
 
 func syscall_pipe() (r, w, err uintptr) {
 	call := libcall{
-		fn:   uintptr(unsafe.Pointer(&pipe1)),
+		fn:   uintptr(unsafe.Pointer(&pipe1x)),
 		n:    0,
-		args: uintptr(unsafe.Pointer(&pipe1)), // it's unused but must be non-nil, otherwise crashes
+		args: uintptr(unsafe.Pointer(&pipe1x)), // it's unused but must be non-nil, otherwise crashes
 	}
 	entersyscallblock()
-	asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
+	asmcgocall(unsafe.Pointer(&asmsysvicall6x), unsafe.Pointer(&call))
 	exitsyscall()
 	return call.r1, call.r2, call.err
 }
@@ -200,7 +204,7 @@ func syscall_setgid(gid uintptr) (err uintptr) {
 		n:    1,
 		args: uintptr(unsafe.Pointer(&gid)),
 	}
-	asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
+	asmcgocall(unsafe.Pointer(&asmsysvicall6x), unsafe.Pointer(&call))
 	return call.err
 }
 
@@ -211,7 +215,7 @@ func syscall_setgroups(ngid, gid uintptr) (err uintptr) {
 		n:    2,
 		args: uintptr(unsafe.Pointer(&ngid)),
 	}
-	asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
+	asmcgocall(unsafe.Pointer(&asmsysvicall6x), unsafe.Pointer(&call))
 	return call.err
 }
 
@@ -222,7 +226,7 @@ func syscall_setsid() (pid, err uintptr) {
 		n:    0,
 		args: uintptr(unsafe.Pointer(&libc_setsid)), // it's unused but must be non-nil, otherwise crashes
 	}
-	asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
+	asmcgocall(unsafe.Pointer(&asmsysvicall6x), unsafe.Pointer(&call))
 	return call.r1, call.err
 }
 
@@ -233,7 +237,7 @@ func syscall_setuid(uid uintptr) (err uintptr) {
 		n:    1,
 		args: uintptr(unsafe.Pointer(&uid)),
 	}
-	asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
+	asmcgocall(unsafe.Pointer(&asmsysvicall6x), unsafe.Pointer(&call))
 	return call.err
 }
 
@@ -244,7 +248,7 @@ func syscall_setpgid(pid, pgid uintptr) (err uintptr) {
 		n:    2,
 		args: uintptr(unsafe.Pointer(&pid)),
 	}
-	asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
+	asmcgocall(unsafe.Pointer(&asmsysvicall6x), unsafe.Pointer(&call))
 	return call.err
 }
 
@@ -255,7 +259,7 @@ func syscall_syscall(trap, a1, a2, a3 uintptr) (r1, r2, err uintptr) {
 		args: uintptr(unsafe.Pointer(&trap)),
 	}
 	entersyscallblock()
-	asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
+	asmcgocall(unsafe.Pointer(&asmsysvicall6x), unsafe.Pointer(&call))
 	exitsyscall()
 	return call.r1, call.r2, call.err
 }
@@ -267,7 +271,7 @@ func syscall_wait4(pid uintptr, wstatus *uint32, options uintptr, rusage unsafe.
 		args: uintptr(unsafe.Pointer(&pid)),
 	}
 	entersyscallblock()
-	asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
+	asmcgocall(unsafe.Pointer(&asmsysvicall6x), unsafe.Pointer(&call))
 	exitsyscall()
 	return int(call.r1), call.err
 }
@@ -279,6 +283,6 @@ func syscall_write(fd, buf, nbyte uintptr) (n, err uintptr) {
 		n:    3,
 		args: uintptr(unsafe.Pointer(&fd)),
 	}
-	asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
+	asmcgocall(unsafe.Pointer(&asmsysvicall6x), unsafe.Pointer(&call))
 	return call.r1, call.err
 }