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syscall: support POSIX semantics for Linux syscalls

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This change adds two new methods for invoking system calls
under Linux: syscall.AllThreadsSyscall() and
syscall.AllThreadsSyscall6().

These system call wrappers ensure that all OSThreads mirror
a common system call. The wrappers serialize execution of the
runtime to ensure no race conditions where any Go code observes
a non-atomic OS state change. As such, the syscalls have
higher runtime overhead than regular system calls, and only
need to be used where such thread (or 'm' in the parlance
of the runtime sources) consistency is required.

The new support is used to enable these functions under Linux:

  syscall.Setegid(), syscall.Seteuid(), syscall.Setgroups(),
  syscall.Setgid(), syscall.Setregid(), syscall.Setreuid(),
  syscall.Setresgid(), syscall.Setresuid() and syscall.Setuid().

They work identically to their glibc counterparts.

Extensive discussion of the background issue addressed in this
patch can be found here:

   https://github.com/golang/go/issues/1435

In the case where cgo is used, the C runtime can launch pthreads that
are not managed by the Go runtime. As such, the added
syscall.AllThreadsSyscall*() return ENOTSUP when cgo is enabled.
However, for the 9 syscall.Set*() functions listed above, when cgo is
active, these functions redirect to invoke their C.set*() equivalents
in glibc, which wraps the raw system calls with a nptl:setxid fixup
mechanism. This achieves POSIX semantics for these functions in the
combined Go and C runtime.

As a side note, the glibc/nptl:setxid support (2019-11-30) does not
extend to all security related system calls under Linux so using
native Go (CGO_ENABLED=0) and these AllThreadsSyscall*()s, where
needed, will yield more well defined/consistent behavior over all
threads of a Go program. That is, using the
syscall.AllThreadsSyscall*() wrappers for things like setting state
through SYS_PRCTL and SYS_CAPSET etc.

Fixes #1435

Change-Id: Ib1a3e16b9180f64223196a32fc0f9dce14d9105c
Reviewed-on: https://go-review.googlesource.com/c/go/+/210639
Trust: Emmanuel Odeke <emm.odeke@gmail.com>
Trust: Ian Lance Taylor <iant@golang.org>
Trust: Michael Pratt <mpratt@google.com>
Run-TryBot: Emmanuel Odeke <emm.odeke@gmail.com>
Reviewed-by: Michael Pratt <mpratt@google.com>
Reviewed-by: Austin Clements <austin@google.com>
This commit is contained in:
Andrew G. Morgan 2019-12-09 21:50:16 -08:00 committed by Michael Pratt
parent 75032ad8cf
commit d1b1145cac
32 changed files with 1020 additions and 660 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

1
misc/cgo/test/cgo_linux_test.go
View file

@ -15,5 +15,6 @@ func TestSetgid(t *testing.T) {
}
testSetgid(t)
}
func Test1435(t *testing.T) { test1435(t) }
func Test6997(t *testing.T) { test6997(t) }
func TestBuildID(t *testing.T) { testBuildID(t) }

152
misc/cgo/test/issue1435.go Normal file
View file

@ -0,0 +1,152 @@
// Copyright 2019 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 linux,cgo
package cgotest
import (
"fmt"
"io/ioutil"
"strings"
"syscall"
"testing"
)
// #include <stdio.h>
// #include <stdlib.h>
// #include <pthread.h>
// #include <unistd.h>
// #include <sys/types.h>
//
// pthread_t *t = NULL;
// pthread_mutex_t mu;
// int nts = 0;
// int all_done = 0;
//
// static void *aFn(void *vargp) {
// int done = 0;
// while (!done) {
// usleep(100);
// pthread_mutex_lock(&mu);
// done = all_done;
// pthread_mutex_unlock(&mu);
// }
// return NULL;
// }
//
// void trial(int argc) {
// int i;
// nts = argc;
// t = calloc(nts, sizeof(pthread_t));
// pthread_mutex_init(&mu, NULL);
// for (i = 0; i < nts; i++) {
// pthread_create(&t[i], NULL, aFn, NULL);
// }
// }
//
// void cleanup(void) {
// int i;
// pthread_mutex_lock(&mu);
// all_done = 1;
// pthread_mutex_unlock(&mu);
// for (i = 0; i < nts; i++) {
// pthread_join(t[i], NULL);
// }
// pthread_mutex_destroy(&mu);
// free(t);
// }
import "C"
// compareStatus is used to confirm the contents of the thread
// specific status files match expectations.
func compareStatus(filter, expect string) error {
expected := filter + "\t" + expect
pid := syscall.Getpid()
fs, err := ioutil.ReadDir(fmt.Sprintf("/proc/%d/task", pid))
if err != nil {
return fmt.Errorf("unable to find %d tasks: %v", pid, err)
}
for _, f := range fs {
tf := fmt.Sprintf("/proc/%s/status", f.Name())
d, err := ioutil.ReadFile(tf)
if err != nil {
return fmt.Errorf("unable to read %q: %v", tf, err)
}
lines := strings.Split(string(d), "\n")
for _, line := range lines {
if strings.HasPrefix(line, filter) {
if line != expected {
return fmt.Errorf("%s %s (bad)\n", tf, line)
}
break
}
}
}
return nil
}
// test1435 test 9 glibc implemented setuid/gid syscall functions are
// mapped. This test is a slightly more expansive test than that of
// src/syscall/syscall_linux_test.go:TestSetuidEtc() insofar as it
// launches concurrent threads from C code via CGo and validates that
// they are subject to the system calls being tested. For the actual
// Go functionality being tested here, the syscall_linux_test version
// is considered authoritative, but non-trivial improvements to that
// should be mirrored here.
func test1435(t *testing.T) {
if syscall.Getuid() != 0 {
t.Skip("skipping root only test")
}
// Launch some threads in C.
const cts = 5
C.trial(cts)
defer C.cleanup()
vs := []struct {
call string
fn func() error
filter, expect string
}{
{call: "Setegid(1)", fn: func() error { return syscall.Setegid(1) }, filter: "Gid:", expect: "0\t1\t0\t1"},
{call: "Setegid(0)", fn: func() error { return syscall.Setegid(0) }, filter: "Gid:", expect: "0\t0\t0\t0"},
{call: "Seteuid(1)", fn: func() error { return syscall.Seteuid(1) }, filter: "Uid:", expect: "0\t1\t0\t1"},
{call: "Setuid(0)", fn: func() error { return syscall.Setuid(0) }, filter: "Uid:", expect: "0\t0\t0\t0"},
{call: "Setgid(1)", fn: func() error { return syscall.Setgid(1) }, filter: "Gid:", expect: "1\t1\t1\t1"},
{call: "Setgid(0)", fn: func() error { return syscall.Setgid(0) }, filter: "Gid:", expect: "0\t0\t0\t0"},
{call: "Setgroups([]int{0,1,2,3})", fn: func() error { return syscall.Setgroups([]int{0, 1, 2, 3}) }, filter: "Groups:", expect: "0 1 2 3 "},
{call: "Setgroups(nil)", fn: func() error { return syscall.Setgroups(nil) }, filter: "Groups:", expect: " "},
{call: "Setgroups([]int{0})", fn: func() error { return syscall.Setgroups([]int{0}) }, filter: "Groups:", expect: "0 "},
{call: "Setregid(101,0)", fn: func() error { return syscall.Setregid(101, 0) }, filter: "Gid:", expect: "101\t0\t0\t0"},
{call: "Setregid(0,102)", fn: func() error { return syscall.Setregid(0, 102) }, filter: "Gid:", expect: "0\t102\t102\t102"},
{call: "Setregid(0,0)", fn: func() error { return syscall.Setregid(0, 0) }, filter: "Gid:", expect: "0\t0\t0\t0"},
{call: "Setreuid(1,0)", fn: func() error { return syscall.Setreuid(1, 0) }, filter: "Uid:", expect: "1\t0\t0\t0"},
{call: "Setreuid(0,2)", fn: func() error { return syscall.Setreuid(0, 2) }, filter: "Uid:", expect: "0\t2\t2\t2"},
{call: "Setreuid(0,0)", fn: func() error { return syscall.Setreuid(0, 0) }, filter: "Uid:", expect: "0\t0\t0\t0"},
{call: "Setresgid(101,0,102)", fn: func() error { return syscall.Setresgid(101, 0, 102) }, filter: "Gid:", expect: "101\t0\t102\t0"},
{call: "Setresgid(0,102,101)", fn: func() error { return syscall.Setresgid(0, 102, 101) }, filter: "Gid:", expect: "0\t102\t101\t102"},
{call: "Setresgid(0,0,0)", fn: func() error { return syscall.Setresgid(0, 0, 0) }, filter: "Gid:", expect: "0\t0\t0\t0"},
{call: "Setresuid(1,0,2)", fn: func() error { return syscall.Setresuid(1, 0, 2) }, filter: "Uid:", expect: "1\t0\t2\t0"},
{call: "Setresuid(0,2,1)", fn: func() error { return syscall.Setresuid(0, 2, 1) }, filter: "Uid:", expect: "0\t2\t1\t2"},
{call: "Setresuid(0,0,0)", fn: func() error { return syscall.Setresuid(0, 0, 0) }, filter: "Uid:", expect: "0\t0\t0\t0"},
}
for i, v := range vs {
if err := v.fn(); err != nil {
t.Errorf("[%d] %q failed: %v", i, v.call, err)
continue
}
if err := compareStatus(v.filter, v.expect); err != nil {
t.Errorf("[%d] %q comparison: %v", i, v.call, err)
}
}
}

74
src/runtime/cgo/linux.go Normal file
View file

@ -0,0 +1,74 @@
// Copyright 2019 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.
// Linux system call wrappers that provide POSIX semantics through the
// corresponding cgo->libc (nptl) wrappers for various system calls.
// +build linux
package cgo
import "unsafe"
// Each of the following entries is needed to ensure that the
// syscall.syscall_linux code can conditionally call these
// function pointers:
//
// 1. find the C-defined function start
// 2. force the local byte alias to be mapped to that location
// 3. map the Go pointer to the function to the syscall package
//go:cgo_import_static _cgo_libc_setegid
//go:linkname _cgo_libc_setegid _cgo_libc_setegid
//go:linkname cgo_libc_setegid syscall.cgo_libc_setegid
var _cgo_libc_setegid byte
var cgo_libc_setegid = unsafe.Pointer(&_cgo_libc_setegid)
//go:cgo_import_static _cgo_libc_seteuid
//go:linkname _cgo_libc_seteuid _cgo_libc_seteuid
//go:linkname cgo_libc_seteuid syscall.cgo_libc_seteuid
var _cgo_libc_seteuid byte
var cgo_libc_seteuid = unsafe.Pointer(&_cgo_libc_seteuid)
//go:cgo_import_static _cgo_libc_setregid
//go:linkname _cgo_libc_setregid _cgo_libc_setregid
//go:linkname cgo_libc_setregid syscall.cgo_libc_setregid
var _cgo_libc_setregid byte
var cgo_libc_setregid = unsafe.Pointer(&_cgo_libc_setregid)
//go:cgo_import_static _cgo_libc_setresgid
//go:linkname _cgo_libc_setresgid _cgo_libc_setresgid
//go:linkname cgo_libc_setresgid syscall.cgo_libc_setresgid
var _cgo_libc_setresgid byte
var cgo_libc_setresgid = unsafe.Pointer(&_cgo_libc_setresgid)
//go:cgo_import_static _cgo_libc_setresuid
//go:linkname _cgo_libc_setresuid _cgo_libc_setresuid
//go:linkname cgo_libc_setresuid syscall.cgo_libc_setresuid
var _cgo_libc_setresuid byte
var cgo_libc_setresuid = unsafe.Pointer(&_cgo_libc_setresuid)
//go:cgo_import_static _cgo_libc_setreuid
//go:linkname _cgo_libc_setreuid _cgo_libc_setreuid
//go:linkname cgo_libc_setreuid syscall.cgo_libc_setreuid
var _cgo_libc_setreuid byte
var cgo_libc_setreuid = unsafe.Pointer(&_cgo_libc_setreuid)
//go:cgo_import_static _cgo_libc_setgroups
//go:linkname _cgo_libc_setgroups _cgo_libc_setgroups
//go:linkname cgo_libc_setgroups syscall.cgo_libc_setgroups
var _cgo_libc_setgroups byte
var cgo_libc_setgroups = unsafe.Pointer(&_cgo_libc_setgroups)
//go:cgo_import_static _cgo_libc_setgid
//go:linkname _cgo_libc_setgid _cgo_libc_setgid
//go:linkname cgo_libc_setgid syscall.cgo_libc_setgid
var _cgo_libc_setgid byte
var cgo_libc_setgid = unsafe.Pointer(&_cgo_libc_setgid)
//go:cgo_import_static _cgo_libc_setuid
//go:linkname _cgo_libc_setuid _cgo_libc_setuid
//go:linkname cgo_libc_setuid syscall.cgo_libc_setuid
var _cgo_libc_setuid byte
var cgo_libc_setuid = unsafe.Pointer(&_cgo_libc_setuid)

85
src/runtime/cgo/linux_syscall.c Normal file
View file

@ -0,0 +1,85 @@
// Copyright 2019 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 linux
#ifndef _GNU_SOURCE // setres[ug]id() API.
#define _GNU_SOURCE
#endif
#include <grp.h>
#include <sys/types.h>
#include <sys/unistd.h>
#include <errno.h>
#include "libcgo.h"
/*
* Assumed POSIX compliant libc system call wrappers. For linux, the
* glibc/nptl/setxid mechanism ensures that POSIX semantics are
* honored for all pthreads (by default), and this in turn with cgo
* ensures that all Go threads launched with cgo are kept in sync for
* these function calls.
*/
// argset_t matches runtime/cgocall.go:argset.
typedef struct {
uintptr_t* args;
uintptr_t retval;
} argset_t;
// libc backed posix-compliant syscalls.
#define SET_RETVAL(fn) \
uintptr_t ret = (uintptr_t) fn ; \
if (ret == -1) { \
x->retval = (uintptr_t) errno; \
} else \
x->retval = ret
void
_cgo_libc_setegid(argset_t* x) {
SET_RETVAL(setegid((gid_t) x->args[0]));
}
void
_cgo_libc_seteuid(argset_t* x) {
SET_RETVAL(seteuid((uid_t) x->args[0]));
}
void
_cgo_libc_setgid(argset_t* x) {
SET_RETVAL(setgid((gid_t) x->args[0]));
}
void
_cgo_libc_setgroups(argset_t* x) {
SET_RETVAL(setgroups((size_t) x->args[0], (const gid_t *) x->args[1]));
}
void
_cgo_libc_setregid(argset_t* x) {
SET_RETVAL(setregid((gid_t) x->args[0], (gid_t) x->args[1]));
}
void
_cgo_libc_setresgid(argset_t* x) {
SET_RETVAL(setresgid((gid_t) x->args[0], (gid_t) x->args[1],
(gid_t) x->args[2]));
}
void
_cgo_libc_setresuid(argset_t* x) {
SET_RETVAL(setresuid((uid_t) x->args[0], (uid_t) x->args[1],
(uid_t) x->args[2]));
}
void
_cgo_libc_setreuid(argset_t* x) {
SET_RETVAL(setreuid((uid_t) x->args[0], (uid_t) x->args[1]));
}
void
_cgo_libc_setuid(argset_t* x) {
SET_RETVAL(setuid((uid_t) x->args[0]));
}

16
src/runtime/cgocall.go
View file

@ -93,6 +93,22 @@ import (
// Length must match arg.Max in x_cgo_callers in runtime/cgo/gcc_traceback.c.
type cgoCallers [32]uintptr
// argset matches runtime/cgo/linux_syscall.c:argset_t
type argset struct {
args unsafe.Pointer
retval uintptr
}
// wrapper for syscall package to call cgocall for libc (cgo) calls.
//go:linkname syscall_cgocaller syscall.cgocaller
//go:nosplit
//go:uintptrescapes
func syscall_cgocaller(fn unsafe.Pointer, args ...uintptr) uintptr {
as := argset{args: unsafe.Pointer(&args[0])}
cgocall(fn, unsafe.Pointer(&as))
return as.retval
}
// Call from Go to C.
//
// This must be nosplit because it's used for syscalls on some

210
src/runtime/proc.go
View file

@ -137,6 +137,10 @@ func main() {
mainStarted = true
if GOARCH != "wasm" { // no threads on wasm yet, so no sysmon
// For runtime_syscall_doAllThreadsSyscall, we
// register sysmon is not ready for the world to be
// stopped.
atomic.Store(&sched.sysmonStarting, 1)
systemstack(func() {
newm(sysmon, nil, -1)
})
@ -153,6 +157,7 @@ func main() {
if g.m != &m0 {
throw("runtime.main not on m0")
}
m0.doesPark = true
// Record when the world started.
// Must be before doInit for tracing init.
@ -1226,6 +1231,21 @@ func mstartm0() {
initsig(false)
}
// mPark causes a thread to park itself - temporarily waking for
// fixups but otherwise waiting to be fully woken. This is the
// only way that m's should park themselves.
//go:nosplit
func mPark() {
g := getg()
for {
notesleep(&g.m.park)
noteclear(&g.m.park)
if !mDoFixup() {
return
}
}
}
// mexit tears down and exits the current thread.
//
// Don't call this directly to exit the thread, since it must run at
@ -1257,7 +1277,7 @@ func mexit(osStack bool) {
sched.nmfreed++
checkdead()
unlock(&sched.lock)
notesleep(&m.park)
mPark()
throw("locked m0 woke up")
}
@ -1424,6 +1444,127 @@ func forEachP(fn func(*p)) {
releasem(mp)
}
// syscall_runtime_doAllThreadsSyscall serializes Go execution and
// executes a specified fn() call on all m's.
//
// The boolean argument to fn() indicates whether the function's
// return value will be consulted or not. That is, fn(true) should
// return true if fn() succeeds, and fn(true) should return false if
// it failed. When fn(false) is called, its return status will be
// ignored.
//
// syscall_runtime_doAllThreadsSyscall first invokes fn(true) on a
// single, coordinating, m, and only if it returns true does it go on
// to invoke fn(false) on all of the other m's known to the process.
//
//go:linkname syscall_runtime_doAllThreadsSyscall syscall.runtime_doAllThreadsSyscall
func syscall_runtime_doAllThreadsSyscall(fn func(bool) bool) {
if iscgo {
panic("doAllThreadsSyscall not supported with cgo enabled")
}
if fn == nil {
return
}
for atomic.Load(&sched.sysmonStarting) != 0 {
osyield()
}
stopTheWorldGC("doAllThreadsSyscall")
if atomic.Load(&newmHandoff.haveTemplateThread) != 0 {
// Ensure that there are no in-flight thread
// creations: don't want to race with allm.
lock(&newmHandoff.lock)
for !newmHandoff.waiting {
unlock(&newmHandoff.lock)
osyield()
lock(&newmHandoff.lock)
}
unlock(&newmHandoff.lock)
}
if netpollinited() {
netpollBreak()
}
_g_ := getg()
if raceenabled {
// For m's running without racectx, we loan out the
// racectx of this call.
lock(&mFixupRace.lock)
mFixupRace.ctx = _g_.racectx
unlock(&mFixupRace.lock)
}
if ok := fn(true); ok {
tid := _g_.m.procid
for mp := allm; mp != nil; mp = mp.alllink {
if mp.procid == tid {
// This m has already completed fn()
// call.
continue
}
// Be wary of mp's without procid values if
// they are known not to park. If they are
// marked as parking with a zero procid, then
// they will be racing with this code to be
// allocated a procid and we will annotate
// them with the need to execute the fn when
// they acquire a procid to run it.
if mp.procid == 0 && !mp.doesPark {
// Reaching here, we are either
// running Windows, or cgo linked
// code. Neither of which are
// currently supported by this API.
throw("unsupported runtime environment")
}
// stopTheWorldGC() doesn't guarantee stopping
// all the threads, so we lock here to avoid
// the possibility of racing with mp.
lock(&mp.mFixup.lock)
mp.mFixup.fn = fn
if mp.doesPark {
// For non-service threads this will
// cause the wakeup to be short lived
// (once the mutex is unlocked). The
// next real wakeup will occur after
// startTheWorldGC() is called.
notewakeup(&mp.park)
}
unlock(&mp.mFixup.lock)
}
for {
done := true
for mp := allm; done && mp != nil; mp = mp.alllink {
if mp.procid == tid {
continue
}
lock(&mp.mFixup.lock)
done = done && (mp.mFixup.fn == nil)
unlock(&mp.mFixup.lock)
}
if done {
break
}
// if needed force sysmon and/or newmHandoff to wakeup.
lock(&sched.lock)
if atomic.Load(&sched.sysmonwait) != 0 {
atomic.Store(&sched.sysmonwait, 0)
notewakeup(&sched.sysmonnote)
}
unlock(&sched.lock)
lock(&newmHandoff.lock)
if newmHandoff.waiting {
newmHandoff.waiting = false
notewakeup(&newmHandoff.wake)
}
unlock(&newmHandoff.lock)
osyield()
}
}
if raceenabled {
lock(&mFixupRace.lock)
mFixupRace.ctx = 0
unlock(&mFixupRace.lock)
}
startTheWorldGC()
}
// runSafePointFn runs the safe point function, if any, for this P.
// This should be called like
//
@ -1816,6 +1957,7 @@ var newmHandoff struct {
//go:nowritebarrierrec
func newm(fn func(), _p_ *p, id int64) {
mp := allocm(_p_, fn, id)
mp.doesPark = (_p_ != nil)
mp.nextp.set(_p_)
mp.sigmask = initSigmask
if gp := getg(); gp != nil && gp.m != nil && (gp.m.lockedExt != 0 || gp.m.incgo) && GOOS != "plan9" {
@ -1888,6 +2030,57 @@ func startTemplateThread() {
releasem(mp)
}
// mFixupRace is used to temporarily borrow the race context from the
// coordinating m during a syscall_runtime_doAllThreadsSyscall and
// loan it out to each of the m's of the runtime so they can execute a
// mFixup.fn in that context.
var mFixupRace struct {
lock mutex
ctx uintptr
}
// mDoFixup runs any outstanding fixup function for the running m.
// Returns true if a fixup was outstanding and actually executed.
//
//go:nosplit
func mDoFixup() bool {
_g_ := getg()
lock(&_g_.m.mFixup.lock)
fn := _g_.m.mFixup.fn
if fn != nil {
if gcphase != _GCoff {
// We can't have a write barrier in this
// context since we may not have a P, but we
// clear fn to signal that we've executed the
// fixup. As long as fn is kept alive
// elsewhere, technically we should have no
// issues with the GC, but fn is likely
// generated in a different package altogether
// that may change independently. Just assert
// the GC is off so this lack of write barrier
// is more obviously safe.
throw("GC must be disabled to protect validity of fn value")
}
*(*uintptr)(unsafe.Pointer(&_g_.m.mFixup.fn)) = 0
if _g_.racectx != 0 || !raceenabled {
fn(false)
} else {
// temporarily acquire the context of the
// originator of the
// syscall_runtime_doAllThreadsSyscall and
// block others from using it for the duration
// of the fixup call.
lock(&mFixupRace.lock)
_g_.racectx = mFixupRace.ctx
fn(false)
_g_.racectx = 0
unlock(&mFixupRace.lock)
}
}
unlock(&_g_.m.mFixup.lock)
return fn != nil
}
// templateThread is a thread in a known-good state that exists solely
// to start new threads in known-good states when the calling thread
// may not be in a good state.
@ -1924,6 +2117,7 @@ func templateThread() {
noteclear(&newmHandoff.wake)
unlock(&newmHandoff.lock)
notesleep(&newmHandoff.wake)
mDoFixup()
}
}
@ -1945,8 +2139,7 @@ func stopm() {
lock(&sched.lock)
mput(_g_.m)
unlock(&sched.lock)
notesleep(&_g_.m.park)
noteclear(&_g_.m.park)
mPark()
acquirep(_g_.m.nextp.ptr())
_g_.m.nextp = 0
}
@ -2106,8 +2299,7 @@ func stoplockedm() {
}
incidlelocked(1)
// Wait until another thread schedules lockedg again.
notesleep(&_g_.m.park)
noteclear(&_g_.m.park)
mPark()
status := readgstatus(_g_.m.lockedg.ptr())
if status&^_Gscan != _Grunnable {
print("runtime:stoplockedm: g is not Grunnable or Gscanrunnable\n")
@ -4715,9 +4907,14 @@ func sysmon() {
checkdead()
unlock(&sched.lock)
// For syscall_runtime_doAllThreadsSyscall, sysmon is
// sufficiently up to participate in fixups.
atomic.Store(&sched.sysmonStarting, 0)
lasttrace := int64(0)
idle := 0 // how many cycles in succession we had not wokeup somebody
delay := uint32(0)
for {
if idle == 0 { // start with 20us sleep...
delay = 20
@ -4728,6 +4925,7 @@ func sysmon() {
delay = 10 * 1000
}
usleep(delay)
mDoFixup()
now := nanotime()
next, _ := timeSleepUntil()
if debug.schedtrace <= 0 && (sched.gcwaiting != 0 || atomic.Load(&sched.npidle) == uint32(gomaxprocs)) {
@ -4747,6 +4945,7 @@ func sysmon() {
osRelax(true)
}
notetsleep(&sched.sysmonnote, sleep)
mDoFixup()
if shouldRelax {
osRelax(false)
}
@ -4795,6 +4994,7 @@ func sysmon() {
incidlelocked(1)
}
}
mDoFixup()
if next < now {
// There are timers that should have already run,
// perhaps because there is an unpreemptible P.

12
src/runtime/runtime2.go
View file

@ -528,6 +528,7 @@ type m struct {
ncgo int32 // number of cgo calls currently in progress
cgoCallersUse uint32 // if non-zero, cgoCallers in use temporarily
cgoCallers *cgoCallers // cgo traceback if crashing in cgo call
doesPark bool // non-P running threads: sysmon and newmHandoff never use .park
park note
alllink *m // on allm
schedlink muintptr
@ -544,6 +545,13 @@ type m struct {
syscalltick uint32
freelink *m // on sched.freem
// mFixup is used to synchronize OS related m state (credentials etc)
// use mutex to access.
mFixup struct {
lock mutex
fn func(bool) bool
}
// these are here because they are too large to be on the stack
// of low-level NOSPLIT functions.
libcall libcall
@ -768,6 +776,10 @@ type schedt struct {
sysmonwait uint32
sysmonnote note
// While true, sysmon not ready for mFixup calls.
// Accessed atomically.
sysmonStarting uint32
// safepointFn should be called on each P at the next GC
// safepoint if p.runSafePointFn is set.
safePointFn func(*p)

6
src/syscall/setuidgid_32_linux.go
View file

@ -12,4 +12,10 @@ const (
sys_SETGID = SYS_SETGID32
sys_SETUID = SYS_SETUID32
sys_SETREGID = SYS_SETREGID32
sys_SETREUID = SYS_SETREUID32
sys_SETRESGID = SYS_SETRESGID32
sys_SETRESUID = SYS_SETRESUID32
)

6
src/syscall/setuidgid_linux.go
View file

@ -12,4 +12,10 @@ const (
sys_SETGID = SYS_SETGID
sys_SETUID = SYS_SETUID
sys_SETREGID = SYS_SETREGID
sys_SETREUID = SYS_SETREUID
sys_SETRESGID = SYS_SETRESGID
sys_SETRESUID = SYS_SETRESUID
)

247
src/syscall/syscall_linux.go
View file

@ -271,16 +271,37 @@ func Getgroups() (gids []int, err error) {
return
}
var cgo_libc_setgroups unsafe.Pointer // non-nil if cgo linked.
func Setgroups(gids []int) (err error) {
if len(gids) == 0 {
return setgroups(0, nil)
n := uintptr(len(gids))
if n == 0 {
if cgo_libc_setgroups == nil {
if _, _, e1 := AllThreadsSyscall(_SYS_setgroups, 0, 0, 0); e1 != 0 {
err = errnoErr(e1)
}
return
}
if ret := cgocaller(cgo_libc_setgroups, 0, 0); ret != 0 {
err = errnoErr(Errno(ret))
}
return
}
a := make([]_Gid_t, len(gids))
for i, v := range gids {
a[i] = _Gid_t(v)
}
return setgroups(len(a), &a[0])
if cgo_libc_setgroups == nil {
if _, _, e1 := AllThreadsSyscall(_SYS_setgroups, n, uintptr(unsafe.Pointer(&a[0])), 0); e1 != 0 {
err = errnoErr(e1)
}
return
}
if ret := cgocaller(cgo_libc_setgroups, n, uintptr(unsafe.Pointer(&a[0]))); ret != 0 {
err = errnoErr(Errno(ret))
}
return
}
type WaitStatus uint32
@ -957,17 +978,223 @@ func Getpgrp() (pid int) {
//sysnb Setsid() (pid int, err error)
//sysnb Settimeofday(tv *Timeval) (err error)
// issue 1435.
// On linux Setuid and Setgid only affects the current thread, not the process.
// This does not match what most callers expect so we must return an error
// here rather than letting the caller think that the call succeeded.
// allThreadsCaller holds the input and output state for performing a
// allThreadsSyscall that needs to synchronize all OS thread state. Linux
// generally does not always support this natively, so we have to
// manipulate the runtime to fix things up.
type allThreadsCaller struct {
// arguments
trap, a1, a2, a3, a4, a5, a6 uintptr
func Setuid(uid int) (err error) {
return EOPNOTSUPP
// return values (only set by 0th invocation)
r1, r2 uintptr
// err is the error code
err Errno
}
// doSyscall is a callback for executing a syscall on the current m
// (OS thread).
//go:nosplit
//go:norace
func (pc *allThreadsCaller) doSyscall(initial bool) bool {
r1, r2, err := RawSyscall(pc.trap, pc.a1, pc.a2, pc.a3)
if initial {
pc.r1 = r1
pc.r2 = r2
pc.err = err
} else if pc.r1 != r1 || pc.r2 != r2 || pc.err != err {
panic("AllThreadsSyscall results differ between threads; runtime corrupted")
}
return err == 0
}
// doSyscall6 is a callback for executing a syscall6 on the current m
// (OS thread).
//go:nosplit
//go:norace
func (pc *allThreadsCaller) doSyscall6(initial bool) bool {
r1, r2, err := RawSyscall6(pc.trap, pc.a1, pc.a2, pc.a3, pc.a4, pc.a5, pc.a6)
if initial {
pc.r1 = r1
pc.r2 = r2
pc.err = err
} else if pc.r1 != r1 || pc.r2 != r2 || pc.err != err {
panic("AllThreadsSyscall6 results differ between threads; runtime corrupted")
}
return err == 0
}
// Provided by runtime.syscall_runtime_doAllThreadsSyscall which
// serializes the world and invokes the fn on each OS thread (what the
// runtime refers to as m's). Once this function returns, all threads
// are in sync.
func runtime_doAllThreadsSyscall(fn func(bool) bool)
// AllThreadsSyscall performs a syscall on each OS thread of the Go
// runtime. It first invokes the syscall on one thread. Should that
// invocation fail, it returns immediately with the error status.
// Otherwise, it invokes the syscall on all of the remaining threads
// in parallel. It will terminate the program if it observes any
// invoked syscall's return value differs from that of the first
// invocation.
//
// AllThreadsSyscall is intended for emulating simultaneous
// process-wide state changes that require consistently modifying
// per-thread state of the Go runtime.
//
// AllThreadsSyscall is unaware of any threads that are launched
// explicitly by cgo linked code, so the function always returns
// ENOTSUP in binaries that use cgo.
//go:uintptrescapes
func AllThreadsSyscall(trap, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno) {
if cgo_libc_setegid != nil {
return minus1, minus1, ENOTSUP
}
pc := &allThreadsCaller{
trap: trap,
a1: a1,
a2: a2,
a3: a3,
}
runtime_doAllThreadsSyscall(pc.doSyscall)
r1 = pc.r1
r2 = pc.r2
err = pc.err
return
}
// AllThreadsSyscall6 is like AllThreadsSyscall, but extended to six
// arguments.
//go:uintptrescapes
func AllThreadsSyscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err Errno) {
if cgo_libc_setegid != nil {
return minus1, minus1, ENOTSUP
}
pc := &allThreadsCaller{
trap: trap,
a1: a1,
a2: a2,
a3: a3,
a4: a4,
a5: a5,
a6: a6,
}
runtime_doAllThreadsSyscall(pc.doSyscall6)
r1 = pc.r1
r2 = pc.r2
err = pc.err
return
}
// linked by runtime.cgocall.go
//go:uintptrescapes
func cgocaller(unsafe.Pointer, ...uintptr) uintptr
var cgo_libc_setegid unsafe.Pointer // non-nil if cgo linked.
const minus1 = ^uintptr(0)
func Setegid(egid int) (err error) {
if cgo_libc_setegid == nil {
if _, _, e1 := AllThreadsSyscall(SYS_SETRESGID, minus1, uintptr(egid), minus1); e1 != 0 {
err = errnoErr(e1)
}
} else if ret := cgocaller(cgo_libc_setegid, uintptr(egid)); ret != 0 {
err = errnoErr(Errno(ret))
}
return
}
var cgo_libc_seteuid unsafe.Pointer // non-nil if cgo linked.
func Seteuid(euid int) (err error) {
if cgo_libc_seteuid == nil {
if _, _, e1 := AllThreadsSyscall(SYS_SETRESUID, minus1, uintptr(euid), minus1); e1 != 0 {
err = errnoErr(e1)
}
} else if ret := cgocaller(cgo_libc_seteuid, uintptr(euid)); ret != 0 {
err = errnoErr(Errno(ret))
}
return
}
var cgo_libc_setgid unsafe.Pointer // non-nil if cgo linked.
func Setgid(gid int) (err error) {
return EOPNOTSUPP
if cgo_libc_setgid == nil {
if _, _, e1 := AllThreadsSyscall(sys_SETGID, uintptr(gid), 0, 0); e1 != 0 {
err = errnoErr(e1)
}
} else if ret := cgocaller(cgo_libc_setgid, uintptr(gid)); ret != 0 {
err = errnoErr(Errno(ret))
}
return
}
var cgo_libc_setregid unsafe.Pointer // non-nil if cgo linked.
func Setregid(rgid, egid int) (err error) {
if cgo_libc_setregid == nil {
if _, _, e1 := AllThreadsSyscall(sys_SETREGID, uintptr(rgid), uintptr(egid), 0); e1 != 0 {
err = errnoErr(e1)
}
} else if ret := cgocaller(cgo_libc_setregid, uintptr(rgid), uintptr(egid)); ret != 0 {
err = errnoErr(Errno(ret))
}
return
}
var cgo_libc_setresgid unsafe.Pointer // non-nil if cgo linked.
func Setresgid(rgid, egid, sgid int) (err error) {
if cgo_libc_setresgid == nil {
if _, _, e1 := AllThreadsSyscall(sys_SETRESGID, uintptr(rgid), uintptr(egid), uintptr(sgid)); e1 != 0 {
err = errnoErr(e1)
}
} else if ret := cgocaller(cgo_libc_setresgid, uintptr(rgid), uintptr(egid), uintptr(sgid)); ret != 0 {
err = errnoErr(Errno(ret))
}
return
}
var cgo_libc_setresuid unsafe.Pointer // non-nil if cgo linked.
func Setresuid(ruid, euid, suid int) (err error) {
if cgo_libc_setresuid == nil {
if _, _, e1 := AllThreadsSyscall(sys_SETRESUID, uintptr(ruid), uintptr(euid), uintptr(suid)); e1 != 0 {
err = errnoErr(e1)
}
} else if ret := cgocaller(cgo_libc_setresuid, uintptr(ruid), uintptr(euid), uintptr(suid)); ret != 0 {
err = errnoErr(Errno(ret))
}
return
}
var cgo_libc_setreuid unsafe.Pointer // non-nil if cgo linked.
func Setreuid(ruid, euid int) (err error) {
if cgo_libc_setreuid == nil {
if _, _, e1 := AllThreadsSyscall(sys_SETREUID, uintptr(ruid), uintptr(euid), 0); e1 != 0 {
err = errnoErr(e1)
}
} else if ret := cgocaller(cgo_libc_setreuid, uintptr(ruid), uintptr(euid)); ret != 0 {
err = errnoErr(Errno(ret))
}
return
}
var cgo_libc_setuid unsafe.Pointer // non-nil if cgo linked.
func Setuid(uid int) (err error) {
if cgo_libc_setuid == nil {
if _, _, e1 := AllThreadsSyscall(sys_SETUID, uintptr(uid), 0, 0); e1 != 0 {
err = errnoErr(e1)
}
} else if ret := cgocaller(cgo_libc_setuid, uintptr(uid)); ret != 0 {
err = errnoErr(Errno(ret))
}
return
}
//sys Setpriority(which int, who int, prio int) (err error)

5
src/syscall/syscall_linux_386.go
View file

@ -64,16 +64,11 @@ func Pipe2(p []int, flags int) (err error) {
//sys sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) = SYS_SENDFILE64
//sys Setfsgid(gid int) (err error) = SYS_SETFSGID32
//sys Setfsuid(uid int) (err error) = SYS_SETFSUID32
//sysnb Setregid(rgid int, egid int) (err error) = SYS_SETREGID32
//sysnb Setresgid(rgid int, egid int, sgid int) (err error) = SYS_SETRESGID32
//sysnb Setresuid(ruid int, euid int, suid int) (err error) = SYS_SETRESUID32
//sysnb Setreuid(ruid int, euid int) (err error) = SYS_SETREUID32
//sys Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int, err error)
//sys SyncFileRange(fd int, off int64, n int64, flags int) (err error)
//sys Truncate(path string, length int64) (err error) = SYS_TRUNCATE64
//sys Ustat(dev int, ubuf *Ustat_t) (err error)
//sysnb getgroups(n int, list *_Gid_t) (nn int, err error) = SYS_GETGROUPS32
//sysnb setgroups(n int, list *_Gid_t) (err error) = SYS_SETGROUPS32
//sys Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err error) = SYS__NEWSELECT
//sys mmap2(addr uintptr, length uintptr, prot int, flags int, fd int, pageOffset uintptr) (xaddr uintptr, err error)

5
src/syscall/syscall_linux_amd64.go
View file

@ -30,11 +30,7 @@ const _SYS_setgroups = SYS_SETGROUPS
//sys sendfile(outfd int, infd int, offset *int64, count int) (written int, err error)
//sys Setfsgid(gid int) (err error)
//sys Setfsuid(uid int) (err error)
//sysnb Setregid(rgid int, egid int) (err error)
//sysnb Setresgid(rgid int, egid int, sgid int) (err error)
//sysnb Setresuid(ruid int, euid int, suid int) (err error)
//sysnb Setrlimit(resource int, rlim *Rlimit) (err error)
//sysnb Setreuid(ruid int, euid int) (err error)
//sys Shutdown(fd int, how int) (err error)
//sys Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int64, err error)
//sys Statfs(path string, buf *Statfs_t) (err error)
@ -47,7 +43,6 @@ const _SYS_setgroups = SYS_SETGROUPS
//sys connect(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
//sys fstatat(fd int, path string, stat *Stat_t, flags int) (err error) = SYS_NEWFSTATAT
//sysnb getgroups(n int, list *_Gid_t) (nn int, err error)
//sysnb setgroups(n int, list *_Gid_t) (err error)
//sys getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error)
//sys setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) (err error)
//sysnb socket(domain int, typ int, proto int) (fd int, err error)

5
src/syscall/syscall_linux_arm.go
View file

@ -63,7 +63,6 @@ func Seek(fd int, offset int64, whence int) (newoffset int64, err error) {
//sys bind(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
//sys connect(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
//sysnb getgroups(n int, list *_Gid_t) (nn int, err error) = SYS_GETGROUPS32
//sysnb setgroups(n int, list *_Gid_t) (err error) = SYS_SETGROUPS32
//sys getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error)
//sys setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) (err error)
//sysnb socket(domain int, typ int, proto int) (fd int, err error)
@ -94,10 +93,6 @@ func Seek(fd int, offset int64, whence int) (newoffset int64, err error) {
//sys Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err error) = SYS__NEWSELECT
//sys Setfsgid(gid int) (err error) = SYS_SETFSGID32
//sys Setfsuid(uid int) (err error) = SYS_SETFSUID32
//sysnb Setregid(rgid int, egid int) (err error) = SYS_SETREGID32
//sysnb Setresgid(rgid int, egid int, sgid int) (err error) = SYS_SETRESGID32
//sysnb Setresuid(ruid int, euid int, suid int) (err error) = SYS_SETRESUID32
//sysnb Setreuid(ruid int, euid int) (err error) = SYS_SETREUID32
//sys Shutdown(fd int, how int) (err error)
//sys Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int, err error)
//sys Ustat(dev int, ubuf *Ustat_t) (err error)

4
src/syscall/syscall_linux_arm64.go
View file

@ -35,9 +35,6 @@ func EpollCreate(size int) (fd int, err error) {
//sys sendfile(outfd int, infd int, offset *int64, count int) (written int, err error)
//sys Setfsgid(gid int) (err error)
//sys Setfsuid(uid int) (err error)
//sysnb Setregid(rgid int, egid int) (err error)
//sysnb Setresgid(rgid int, egid int, sgid int) (err error)
//sysnb Setresuid(ruid int, euid int, suid int) (err error)
//sysnb setrlimit(resource int, rlim *Rlimit) (err error)
//sysnb Setreuid(ruid int, euid int) (err error)
//sys Shutdown(fd int, how int) (err error)
@ -63,7 +60,6 @@ func Lstat(path string, stat *Stat_t) (err error) {
//sys bind(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
//sys connect(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
//sysnb getgroups(n int, list *_Gid_t) (nn int, err error)
//sysnb setgroups(n int, list *_Gid_t) (err error)
//sys getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error)
//sys setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) (err error)
//sysnb socket(domain int, typ int, proto int) (fd int, err error)

5
src/syscall/syscall_linux_mips64x.go
View file

@ -31,11 +31,7 @@ const _SYS_setgroups = SYS_SETGROUPS
//sys sendfile(outfd int, infd int, offset *int64, count int) (written int, err error)
//sys Setfsgid(gid int) (err error)
//sys Setfsuid(uid int) (err error)
//sysnb Setregid(rgid int, egid int) (err error)
//sysnb Setresgid(rgid int, egid int, sgid int) (err error)
//sysnb Setresuid(ruid int, euid int, suid int) (err error)
//sysnb Setrlimit(resource int, rlim *Rlimit) (err error)
//sysnb Setreuid(ruid int, euid int) (err error)
//sys Shutdown(fd int, how int) (err error)
//sys Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int64, err error)
//sys Statfs(path string, buf *Statfs_t) (err error)
@ -47,7 +43,6 @@ const _SYS_setgroups = SYS_SETGROUPS
//sys bind(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
//sys connect(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
//sysnb getgroups(n int, list *_Gid_t) (nn int, err error)
//sysnb setgroups(n int, list *_Gid_t) (err error)
//sys getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error)
//sys setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) (err error)
//sysnb socket(domain int, typ int, proto int) (fd int, err error)

6
src/syscall/syscall_linux_mipsx.go
View file

@ -32,11 +32,6 @@ func Syscall9(trap, a1, a2, a3, a4, a5, a6, a7, a8, a9 uintptr) (r1, r2 uintptr,
//sys sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) = SYS_SENDFILE64
//sys Setfsgid(gid int) (err error)
//sys Setfsuid(uid int) (err error)
//sysnb Setregid(rgid int, egid int) (err error)
//sysnb Setresgid(rgid int, egid int, sgid int) (err error)
//sysnb Setresuid(ruid int, euid int, suid int) (err error)
//sysnb Setreuid(ruid int, euid int) (err error)
//sys Shutdown(fd int, how int) (err error)
//sys Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int, err error)
@ -48,7 +43,6 @@ func Syscall9(trap, a1, a2, a3, a4, a5, a6, a7, a8, a9 uintptr) (r1, r2 uintptr,
//sys bind(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
//sys connect(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
//sysnb getgroups(n int, list *_Gid_t) (nn int, err error)
//sysnb setgroups(n int, list *_Gid_t) (err error)
//sys getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error)
//sys setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) (err error)
//sysnb socket(domain int, typ int, proto int) (fd int, err error)

5
src/syscall/syscall_linux_ppc64x.go
View file

@ -37,11 +37,7 @@ const _SYS_setgroups = SYS_SETGROUPS
//sys sendfile(outfd int, infd int, offset *int64, count int) (written int, err error)
//sys Setfsgid(gid int) (err error)
//sys Setfsuid(uid int) (err error)
//sysnb Setregid(rgid int, egid int) (err error)
//sysnb Setresgid(rgid int, egid int, sgid int) (err error)
//sysnb Setresuid(ruid int, euid int, suid int) (err error)
//sysnb Setrlimit(resource int, rlim *Rlimit) (err error)
//sysnb Setreuid(ruid int, euid int) (err error)
//sys Shutdown(fd int, how int) (err error)
//sys Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int64, err error)
//sys Stat(path string, stat *Stat_t) (err error)
@ -53,7 +49,6 @@ const _SYS_setgroups = SYS_SETGROUPS
//sys bind(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
//sys connect(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
//sysnb getgroups(n int, list *_Gid_t) (nn int, err error)
//sysnb setgroups(n int, list *_Gid_t) (err error)
//sys getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error)
//sys setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) (err error)
//sysnb socket(domain int, typ int, proto int) (fd int, err error)

5
src/syscall/syscall_linux_riscv64.go
View file

@ -35,11 +35,7 @@ func EpollCreate(size int) (fd int, err error) {
//sys sendfile(outfd int, infd int, offset *int64, count int) (written int, err error)
//sys Setfsgid(gid int) (err error)
//sys Setfsuid(uid int) (err error)
//sysnb Setregid(rgid int, egid int) (err error)
//sysnb Setresgid(rgid int, egid int, sgid int) (err error)
//sysnb Setresuid(ruid int, euid int, suid int) (err error)
//sysnb Setrlimit(resource int, rlim *Rlimit) (err error)
//sysnb Setreuid(ruid int, euid int) (err error)
//sys Shutdown(fd int, how int) (err error)
//sys Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int64, err error)
@ -67,7 +63,6 @@ func Lstat(path string, stat *Stat_t) (err error) {
//sys bind(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
//sys connect(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
//sysnb getgroups(n int, list *_Gid_t) (nn int, err error)
//sysnb setgroups(n int, list *_Gid_t) (err error)
//sys getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error)
//sys setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) (err error)
//sysnb socket(domain int, typ int, proto int) (fd int, err error)

5
src/syscall/syscall_linux_s390x.go
View file

@ -33,11 +33,7 @@ const _SYS_setgroups = SYS_SETGROUPS
//sys sendfile(outfd int, infd int, offset *int64, count int) (written int, err error)
//sys Setfsgid(gid int) (err error)
//sys Setfsuid(uid int) (err error)
//sysnb Setregid(rgid int, egid int) (err error)
//sysnb Setresgid(rgid int, egid int, sgid int) (err error)
//sysnb Setresuid(ruid int, euid int, suid int) (err error)
//sysnb Setrlimit(resource int, rlim *Rlimit) (err error)
//sysnb Setreuid(ruid int, euid int) (err error)
//sys Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int64, err error)
//sys Stat(path string, stat *Stat_t) (err error)
//sys Statfs(path string, buf *Statfs_t) (err error)
@ -45,7 +41,6 @@ const _SYS_setgroups = SYS_SETGROUPS
//sys Truncate(path string, length int64) (err error)
//sys Ustat(dev int, ubuf *Ustat_t) (err error)
//sysnb getgroups(n int, list *_Gid_t) (nn int, err error)
//sysnb setgroups(n int, list *_Gid_t) (err error)
//sys futimesat(dirfd int, path string, times *[2]Timeval) (err error)
//sysnb Gettimeofday(tv *Timeval) (err error)

226
src/syscall/syscall_linux_test.go
View file

@ -399,3 +399,229 @@ func syscallNoError() {
fmt.Println(uintptr(euid1), "/", int(e), "/", uintptr(euid2))
os.Exit(0)
}
// reference uapi/linux/prctl.h
const (
PR_GET_KEEPCAPS uintptr = 7
PR_SET_KEEPCAPS = 8
)
// TestAllThreadsSyscall tests that the go runtime can perform
// syscalls that execute on all OSThreads - with which to support
// POSIX semantics for security state changes.
func TestAllThreadsSyscall(t *testing.T) {
if _, _, err := syscall.AllThreadsSyscall(syscall.SYS_PRCTL, PR_SET_KEEPCAPS, 0, 0); err == syscall.ENOTSUP {
t.Skip("AllThreadsSyscall disabled with cgo")
}
fns := []struct {
label string
fn func(uintptr) error
}{
{
label: "prctl<3-args>",
fn: func(v uintptr) error {
_, _, e := syscall.AllThreadsSyscall(syscall.SYS_PRCTL, PR_SET_KEEPCAPS, v, 0)
if e != 0 {
return e
}
return nil
},
},
{
label: "prctl<6-args>",
fn: func(v uintptr) error {
_, _, e := syscall.AllThreadsSyscall6(syscall.SYS_PRCTL, PR_SET_KEEPCAPS, v, 0, 0, 0, 0)
if e != 0 {
return e
}
return nil
},
},
}
waiter := func(q <-chan uintptr, r chan<- uintptr, once bool) {
for x := range q {
runtime.LockOSThread()
v, _, e := syscall.Syscall(syscall.SYS_PRCTL, PR_GET_KEEPCAPS, 0, 0)
if e != 0 {
t.Errorf("tid=%d prctl(PR_GET_KEEPCAPS) failed: %v", syscall.Gettid(), e)
} else if x != v {
t.Errorf("tid=%d prctl(PR_GET_KEEPCAPS) mismatch: got=%d want=%d", syscall.Gettid(), v, x)
}
r <- v
if once {
break
}
runtime.UnlockOSThread()
}
}
// launches per fns member.
const launches = 11
question := make(chan uintptr)
response := make(chan uintptr)
defer close(question)
routines := 0
for i, v := range fns {
for j := 0; j < launches; j++ {
// Add another goroutine - the closest thing
// we can do to encourage more OS thread
// creation - while the test is running. The
// actual thread creation may or may not be
// needed, based on the number of available
// unlocked OS threads at the time waiter
// calls runtime.LockOSThread(), but the goal
// of doing this every time through the loop
// is to race thread creation with v.fn(want)
// being executed. Via the once boolean we
// also encourage one in 5 waiters to return
// locked after participating in only one
// question response sequence. This allows the
// test to race thread destruction too.
once := routines%5 == 4
go waiter(question, response, once)
// Keep a count of how many goroutines are
// going to participate in the
// question/response test. This will count up
// towards 2*launches minus the count of
// routines that have been invoked with
// once=true.
routines++
// Decide what value we want to set the
// process-shared KEEPCAPS. Note, there is
// an explicit repeat of 0 when we change the
// variant of the syscall being used.
want := uintptr(j & 1)
// Invoke the AllThreadsSyscall* variant.
if err := v.fn(want); err != nil {
t.Errorf("[%d,%d] %s(PR_SET_KEEPCAPS, %d, ...): %v", i, j, v.label, j&1, err)
}
// At this point, we want all launched Go
// routines to confirm that they see the
// wanted value for KEEPCAPS.
for k := 0; k < routines; k++ {
question <- want
}
// At this point, we should have a large
// number of locked OS threads all wanting to
// reply.
for k := 0; k < routines; k++ {
if got := <-response; got != want {
t.Errorf("[%d,%d,%d] waiter result got=%d, want=%d", i, j, k, got, want)
}
}
// Provide an explicit opportunity for this Go
// routine to change Ms.
runtime.Gosched()
if once {
// One waiter routine will have exited.
routines--
}
// Whatever M we are now running on, confirm
// we see the wanted value too.
if v, _, e := syscall.Syscall(syscall.SYS_PRCTL, PR_GET_KEEPCAPS, 0, 0); e != 0 {
t.Errorf("[%d,%d] prctl(PR_GET_KEEPCAPS) failed: %v", i, j, e)
} else if v != want {
t.Errorf("[%d,%d] prctl(PR_GET_KEEPCAPS) gave wrong value: got=%v, want=1", i, j, v)
}
}
}
}
// compareStatus is used to confirm the contents of the thread
// specific status files match expectations.
func compareStatus(filter, expect string) error {
expected := filter + "\t" + expect
pid := syscall.Getpid()
fs, err := ioutil.ReadDir(fmt.Sprintf("/proc/%d/task", pid))
if err != nil {
return fmt.Errorf("unable to find %d tasks: %v", pid, err)
}
for _, f := range fs {
tf := fmt.Sprintf("/proc/%s/status", f.Name())
d, err := ioutil.ReadFile(tf)
if err != nil {
return fmt.Errorf("unable to read %q: %v", tf, err)
}
lines := strings.Split(string(d), "\n")
for _, line := range lines {
if strings.HasPrefix(line, filter) {
if line != expected {
return fmt.Errorf("%s %s (bad)\n", tf, line)
}
break
}
}
}
return nil
}
// TestSetuidEtc performs tests on all of the wrapped system calls
// that mirror to the 9 glibc syscalls with POSIX semantics. The test
// here is considered authoritative and should compile and run
// CGO_ENABLED=0 or 1. Note, there is an extended copy of this same
// test in ../../misc/cgo/test/issue1435.go which requires
// CGO_ENABLED=1 and launches pthreads from C that run concurrently
// with the Go code of the test - and the test validates that these
// pthreads are also kept in sync with the security state changed with
// the syscalls. Care should be taken to mirror any enhancements to
// this test here in that file too.
func TestSetuidEtc(t *testing.T) {
if syscall.Getuid() != 0 {
t.Skip("skipping root only test")
}
vs := []struct {
call string
fn func() error
filter, expect string
}{
{call: "Setegid(1)", fn: func() error { return syscall.Setegid(1) }, filter: "Gid:", expect: "0\t1\t0\t1"},
{call: "Setegid(0)", fn: func() error { return syscall.Setegid(0) }, filter: "Gid:", expect: "0\t0\t0\t0"},
{call: "Seteuid(1)", fn: func() error { return syscall.Seteuid(1) }, filter: "Uid:", expect: "0\t1\t0\t1"},
{call: "Setuid(0)", fn: func() error { return syscall.Setuid(0) }, filter: "Uid:", expect: "0\t0\t0\t0"},
{call: "Setgid(1)", fn: func() error { return syscall.Setgid(1) }, filter: "Gid:", expect: "1\t1\t1\t1"},
{call: "Setgid(0)", fn: func() error { return syscall.Setgid(0) }, filter: "Gid:", expect: "0\t0\t0\t0"},
{call: "Setgroups([]int{0,1,2,3})", fn: func() error { return syscall.Setgroups([]int{0, 1, 2, 3}) }, filter: "Groups:", expect: "0 1 2 3 "},
{call: "Setgroups(nil)", fn: func() error { return syscall.Setgroups(nil) }, filter: "Groups:", expect: " "},
{call: "Setgroups([]int{0})", fn: func() error { return syscall.Setgroups([]int{0}) }, filter: "Groups:", expect: "0 "},
{call: "Setregid(101,0)", fn: func() error { return syscall.Setregid(101, 0) }, filter: "Gid:", expect: "101\t0\t0\t0"},
{call: "Setregid(0,102)", fn: func() error { return syscall.Setregid(0, 102) }, filter: "Gid:", expect: "0\t102\t102\t102"},
{call: "Setregid(0,0)", fn: func() error { return syscall.Setregid(0, 0) }, filter: "Gid:", expect: "0\t0\t0\t0"},
{call: "Setreuid(1,0)", fn: func() error { return syscall.Setreuid(1, 0) }, filter: "Uid:", expect: "1\t0\t0\t0"},
{call: "Setreuid(0,2)", fn: func() error { return syscall.Setreuid(0, 2) }, filter: "Uid:", expect: "0\t2\t2\t2"},
{call: "Setreuid(0,0)", fn: func() error { return syscall.Setreuid(0, 0) }, filter: "Uid:", expect: "0\t0\t0\t0"},
{call: "Setresgid(101,0,102)", fn: func() error { return syscall.Setresgid(101, 0, 102) }, filter: "Gid:", expect: "101\t0\t102\t0"},
{call: "Setresgid(0,102,101)", fn: func() error { return syscall.Setresgid(0, 102, 101) }, filter: "Gid:", expect: "0\t102\t101\t102"},
{call: "Setresgid(0,0,0)", fn: func() error { return syscall.Setresgid(0, 0, 0) }, filter: "Gid:", expect: "0\t0\t0\t0"},
{call: "Setresuid(1,0,2)", fn: func() error { return syscall.Setresuid(1, 0, 2) }, filter: "Uid:", expect: "1\t0\t2\t0"},
{call: "Setresuid(0,2,1)", fn: func() error { return syscall.Setresuid(0, 2, 1) }, filter: "Uid:", expect: "0\t2\t1\t2"},
{call: "Setresuid(0,0,0)", fn: func() error { return syscall.Setresuid(0, 0, 0) }, filter: "Uid:", expect: "0\t0\t0\t0"},
}
for i, v := range vs {
if err := v.fn(); err != nil {
t.Errorf("[%d] %q failed: %v", i, v.call, err)
continue
}
if err := compareStatus(v.filter, v.expect); err != nil {
t.Errorf("[%d] %q comparison: %v", i, v.call, err)
}
}
}

50
src/syscall/zsyscall_linux_386.go
View file

@ -1291,46 +1291,6 @@ func Setfsuid(uid int) (err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Setregid(rgid int, egid int) (err error) {
_, _, e1 := RawSyscall(SYS_SETREGID32, uintptr(rgid), uintptr(egid), 0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Setresgid(rgid int, egid int, sgid int) (err error) {
_, _, e1 := RawSyscall(SYS_SETRESGID32, uintptr(rgid), uintptr(egid), uintptr(sgid))
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Setresuid(ruid int, euid int, suid int) (err error) {
_, _, e1 := RawSyscall(SYS_SETRESUID32, uintptr(ruid), uintptr(euid), uintptr(suid))
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Setreuid(ruid int, euid int) (err error) {
_, _, e1 := RawSyscall(SYS_SETREUID32, uintptr(ruid), uintptr(euid), 0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int, err error) {
r0, _, e1 := Syscall6(SYS_SPLICE, uintptr(rfd), uintptr(unsafe.Pointer(roff)), uintptr(wfd), uintptr(unsafe.Pointer(woff)), uintptr(len), uintptr(flags))
n = int(r0)
@ -1388,16 +1348,6 @@ func getgroups(n int, list *_Gid_t) (nn int, err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func setgroups(n int, list *_Gid_t) (err error) {
_, _, e1 := RawSyscall(SYS_SETGROUPS32, uintptr(n), uintptr(unsafe.Pointer(list)), 0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err error) {
r0, _, e1 := Syscall6(SYS__NEWSELECT, uintptr(nfd), uintptr(unsafe.Pointer(r)), uintptr(unsafe.Pointer(w)), uintptr(unsafe.Pointer(e)), uintptr(unsafe.Pointer(timeout)), 0)
n = int(r0)

50
src/syscall/zsyscall_linux_amd64.go
View file

@ -1308,36 +1308,6 @@ func Setfsuid(uid int) (err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Setregid(rgid int, egid int) (err error) {
_, _, e1 := RawSyscall(SYS_SETREGID, uintptr(rgid), uintptr(egid), 0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Setresgid(rgid int, egid int, sgid int) (err error) {
_, _, e1 := RawSyscall(SYS_SETRESGID, uintptr(rgid), uintptr(egid), uintptr(sgid))
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Setresuid(ruid int, euid int, suid int) (err error) {
_, _, e1 := RawSyscall(SYS_SETRESUID, uintptr(ruid), uintptr(euid), uintptr(suid))
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Setrlimit(resource int, rlim *Rlimit) (err error) {
_, _, e1 := RawSyscall(SYS_SETRLIMIT, uintptr(resource), uintptr(unsafe.Pointer(rlim)), 0)
if e1 != 0 {
@ -1348,16 +1318,6 @@ func Setrlimit(resource int, rlim *Rlimit) (err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Setreuid(ruid int, euid int) (err error) {
_, _, e1 := RawSyscall(SYS_SETREUID, uintptr(ruid), uintptr(euid), 0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Shutdown(fd int, how int) (err error) {
_, _, e1 := Syscall(SYS_SHUTDOWN, uintptr(fd), uintptr(how), 0)
if e1 != 0 {
@ -1497,16 +1457,6 @@ func getgroups(n int, list *_Gid_t) (nn int, err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func setgroups(n int, list *_Gid_t) (err error) {
_, _, e1 := RawSyscall(SYS_SETGROUPS, uintptr(n), uintptr(unsafe.Pointer(list)), 0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error) {
_, _, e1 := Syscall6(SYS_GETSOCKOPT, uintptr(s), uintptr(level), uintptr(name), uintptr(val), uintptr(unsafe.Pointer(vallen)), 0)
if e1 != 0 {

50
src/syscall/zsyscall_linux_arm.go
View file

@ -1120,16 +1120,6 @@ func getgroups(n int, list *_Gid_t) (nn int, err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func setgroups(n int, list *_Gid_t) (err error) {
_, _, e1 := RawSyscall(SYS_SETGROUPS32, uintptr(n), uintptr(unsafe.Pointer(list)), 0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error) {
_, _, e1 := Syscall6(SYS_GETSOCKOPT, uintptr(s), uintptr(level), uintptr(name), uintptr(val), uintptr(unsafe.Pointer(vallen)), 0)
if e1 != 0 {
@ -1427,46 +1417,6 @@ func Setfsuid(uid int) (err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Setregid(rgid int, egid int) (err error) {
_, _, e1 := RawSyscall(SYS_SETREGID32, uintptr(rgid), uintptr(egid), 0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Setresgid(rgid int, egid int, sgid int) (err error) {
_, _, e1 := RawSyscall(SYS_SETRESGID32, uintptr(rgid), uintptr(egid), uintptr(sgid))
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Setresuid(ruid int, euid int, suid int) (err error) {
_, _, e1 := RawSyscall(SYS_SETRESUID32, uintptr(ruid), uintptr(euid), uintptr(suid))
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Setreuid(ruid int, euid int) (err error) {
_, _, e1 := RawSyscall(SYS_SETREUID32, uintptr(ruid), uintptr(euid), 0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Shutdown(fd int, how int) (err error) {
_, _, e1 := Syscall(SYS_SHUTDOWN, uintptr(fd), uintptr(how), 0)
if e1 != 0 {

50
src/syscall/zsyscall_linux_arm64.go
View file

@ -1282,36 +1282,6 @@ func Setfsuid(uid int) (err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Setregid(rgid int, egid int) (err error) {
_, _, e1 := RawSyscall(SYS_SETREGID, uintptr(rgid), uintptr(egid), 0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Setresgid(rgid int, egid int, sgid int) (err error) {
_, _, e1 := RawSyscall(SYS_SETRESGID, uintptr(rgid), uintptr(egid), uintptr(sgid))
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Setresuid(ruid int, euid int, suid int) (err error) {
_, _, e1 := RawSyscall(SYS_SETRESUID, uintptr(ruid), uintptr(euid), uintptr(suid))
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func setrlimit(resource int, rlim *Rlimit) (err error) {
_, _, e1 := RawSyscall(SYS_SETRLIMIT, uintptr(resource), uintptr(unsafe.Pointer(rlim)), 0)
if e1 != 0 {
@ -1322,16 +1292,6 @@ func setrlimit(resource int, rlim *Rlimit) (err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Setreuid(ruid int, euid int) (err error) {
_, _, e1 := RawSyscall(SYS_SETREUID, uintptr(ruid), uintptr(euid), 0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Shutdown(fd int, how int) (err error) {
_, _, e1 := Syscall(SYS_SHUTDOWN, uintptr(fd), uintptr(how), 0)
if e1 != 0 {
@ -1446,16 +1406,6 @@ func getgroups(n int, list *_Gid_t) (nn int, err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func setgroups(n int, list *_Gid_t) (err error) {
_, _, e1 := RawSyscall(SYS_SETGROUPS, uintptr(n), uintptr(unsafe.Pointer(list)), 0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error) {
_, _, e1 := Syscall6(SYS_GETSOCKOPT, uintptr(s), uintptr(level), uintptr(name), uintptr(val), uintptr(unsafe.Pointer(vallen)), 0)
if e1 != 0 {

50
src/syscall/zsyscall_linux_mips.go
View file

@ -1266,46 +1266,6 @@ func Setfsuid(uid int) (err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Setregid(rgid int, egid int) (err error) {
_, _, e1 := RawSyscall(SYS_SETREGID, uintptr(rgid), uintptr(egid), 0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Setresgid(rgid int, egid int, sgid int) (err error) {
_, _, e1 := RawSyscall(SYS_SETRESGID, uintptr(rgid), uintptr(egid), uintptr(sgid))
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Setresuid(ruid int, euid int, suid int) (err error) {
_, _, e1 := RawSyscall(SYS_SETRESUID, uintptr(ruid), uintptr(euid), uintptr(suid))
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Setreuid(ruid int, euid int) (err error) {
_, _, e1 := RawSyscall(SYS_SETREUID, uintptr(ruid), uintptr(euid), 0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Shutdown(fd int, how int) (err error) {
_, _, e1 := Syscall(SYS_SHUTDOWN, uintptr(fd), uintptr(how), 0)
if e1 != 0 {
@ -1415,16 +1375,6 @@ func getgroups(n int, list *_Gid_t) (nn int, err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func setgroups(n int, list *_Gid_t) (err error) {
_, _, e1 := RawSyscall(SYS_SETGROUPS, uintptr(n), uintptr(unsafe.Pointer(list)), 0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error) {
_, _, e1 := Syscall6(SYS_GETSOCKOPT, uintptr(s), uintptr(level), uintptr(name), uintptr(val), uintptr(unsafe.Pointer(vallen)), 0)
if e1 != 0 {

50
src/syscall/zsyscall_linux_mips64.go
View file

@ -1297,36 +1297,6 @@ func Setfsuid(uid int) (err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Setregid(rgid int, egid int) (err error) {
_, _, e1 := RawSyscall(SYS_SETREGID, uintptr(rgid), uintptr(egid), 0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Setresgid(rgid int, egid int, sgid int) (err error) {
_, _, e1 := RawSyscall(SYS_SETRESGID, uintptr(rgid), uintptr(egid), uintptr(sgid))
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Setresuid(ruid int, euid int, suid int) (err error) {
_, _, e1 := RawSyscall(SYS_SETRESUID, uintptr(ruid), uintptr(euid), uintptr(suid))
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Setrlimit(resource int, rlim *Rlimit) (err error) {
_, _, e1 := RawSyscall(SYS_SETRLIMIT, uintptr(resource), uintptr(unsafe.Pointer(rlim)), 0)
if e1 != 0 {
@ -1337,16 +1307,6 @@ func Setrlimit(resource int, rlim *Rlimit) (err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Setreuid(ruid int, euid int) (err error) {
_, _, e1 := RawSyscall(SYS_SETREUID, uintptr(ruid), uintptr(euid), 0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Shutdown(fd int, how int) (err error) {
_, _, e1 := Syscall(SYS_SHUTDOWN, uintptr(fd), uintptr(how), 0)
if e1 != 0 {
@ -1471,16 +1431,6 @@ func getgroups(n int, list *_Gid_t) (nn int, err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func setgroups(n int, list *_Gid_t) (err error) {
_, _, e1 := RawSyscall(SYS_SETGROUPS, uintptr(n), uintptr(unsafe.Pointer(list)), 0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error) {
_, _, e1 := Syscall6(SYS_GETSOCKOPT, uintptr(s), uintptr(level), uintptr(name), uintptr(val), uintptr(unsafe.Pointer(vallen)), 0)
if e1 != 0 {

50
src/syscall/zsyscall_linux_mips64le.go
View file

@ -1297,36 +1297,6 @@ func Setfsuid(uid int) (err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Setregid(rgid int, egid int) (err error) {
_, _, e1 := RawSyscall(SYS_SETREGID, uintptr(rgid), uintptr(egid), 0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Setresgid(rgid int, egid int, sgid int) (err error) {
_, _, e1 := RawSyscall(SYS_SETRESGID, uintptr(rgid), uintptr(egid), uintptr(sgid))
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Setresuid(ruid int, euid int, suid int) (err error) {
_, _, e1 := RawSyscall(SYS_SETRESUID, uintptr(ruid), uintptr(euid), uintptr(suid))
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Setrlimit(resource int, rlim *Rlimit) (err error) {
_, _, e1 := RawSyscall(SYS_SETRLIMIT, uintptr(resource), uintptr(unsafe.Pointer(rlim)), 0)
if e1 != 0 {
@ -1337,16 +1307,6 @@ func Setrlimit(resource int, rlim *Rlimit) (err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Setreuid(ruid int, euid int) (err error) {
_, _, e1 := RawSyscall(SYS_SETREUID, uintptr(ruid), uintptr(euid), 0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Shutdown(fd int, how int) (err error) {
_, _, e1 := Syscall(SYS_SHUTDOWN, uintptr(fd), uintptr(how), 0)
if e1 != 0 {
@ -1471,16 +1431,6 @@ func getgroups(n int, list *_Gid_t) (nn int, err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func setgroups(n int, list *_Gid_t) (err error) {
_, _, e1 := RawSyscall(SYS_SETGROUPS, uintptr(n), uintptr(unsafe.Pointer(list)), 0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error) {
_, _, e1 := Syscall6(SYS_GETSOCKOPT, uintptr(s), uintptr(level), uintptr(name), uintptr(val), uintptr(unsafe.Pointer(vallen)), 0)
if e1 != 0 {

50
src/syscall/zsyscall_linux_mipsle.go
View file

@ -1266,46 +1266,6 @@ func Setfsuid(uid int) (err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Setregid(rgid int, egid int) (err error) {
_, _, e1 := RawSyscall(SYS_SETREGID, uintptr(rgid), uintptr(egid), 0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Setresgid(rgid int, egid int, sgid int) (err error) {
_, _, e1 := RawSyscall(SYS_SETRESGID, uintptr(rgid), uintptr(egid), uintptr(sgid))
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Setresuid(ruid int, euid int, suid int) (err error) {
_, _, e1 := RawSyscall(SYS_SETRESUID, uintptr(ruid), uintptr(euid), uintptr(suid))
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Setreuid(ruid int, euid int) (err error) {
_, _, e1 := RawSyscall(SYS_SETREUID, uintptr(ruid), uintptr(euid), 0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Shutdown(fd int, how int) (err error) {
_, _, e1 := Syscall(SYS_SHUTDOWN, uintptr(fd), uintptr(how), 0)
if e1 != 0 {
@ -1415,16 +1375,6 @@ func getgroups(n int, list *_Gid_t) (nn int, err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func setgroups(n int, list *_Gid_t) (err error) {
_, _, e1 := RawSyscall(SYS_SETGROUPS, uintptr(n), uintptr(unsafe.Pointer(list)), 0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error) {
_, _, e1 := Syscall6(SYS_GETSOCKOPT, uintptr(s), uintptr(level), uintptr(name), uintptr(val), uintptr(unsafe.Pointer(vallen)), 0)
if e1 != 0 {

50
src/syscall/zsyscall_linux_ppc64.go
View file

@ -1370,36 +1370,6 @@ func Setfsuid(uid int) (err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Setregid(rgid int, egid int) (err error) {
_, _, e1 := RawSyscall(SYS_SETREGID, uintptr(rgid), uintptr(egid), 0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Setresgid(rgid int, egid int, sgid int) (err error) {
_, _, e1 := RawSyscall(SYS_SETRESGID, uintptr(rgid), uintptr(egid), uintptr(sgid))
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Setresuid(ruid int, euid int, suid int) (err error) {
_, _, e1 := RawSyscall(SYS_SETRESUID, uintptr(ruid), uintptr(euid), uintptr(suid))
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Setrlimit(resource int, rlim *Rlimit) (err error) {
_, _, e1 := RawSyscall(SYS_SETRLIMIT, uintptr(resource), uintptr(unsafe.Pointer(rlim)), 0)
if e1 != 0 {
@ -1410,16 +1380,6 @@ func Setrlimit(resource int, rlim *Rlimit) (err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Setreuid(ruid int, euid int) (err error) {
_, _, e1 := RawSyscall(SYS_SETREUID, uintptr(ruid), uintptr(euid), 0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Shutdown(fd int, how int) (err error) {
_, _, e1 := Syscall(SYS_SHUTDOWN, uintptr(fd), uintptr(how), 0)
if e1 != 0 {
@ -1549,16 +1509,6 @@ func getgroups(n int, list *_Gid_t) (nn int, err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func setgroups(n int, list *_Gid_t) (err error) {
_, _, e1 := RawSyscall(SYS_SETGROUPS, uintptr(n), uintptr(unsafe.Pointer(list)), 0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error) {
_, _, e1 := Syscall6(SYS_GETSOCKOPT, uintptr(s), uintptr(level), uintptr(name), uintptr(val), uintptr(unsafe.Pointer(vallen)), 0)
if e1 != 0 {

50
src/syscall/zsyscall_linux_ppc64le.go
View file

@ -1370,36 +1370,6 @@ func Setfsuid(uid int) (err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Setregid(rgid int, egid int) (err error) {
_, _, e1 := RawSyscall(SYS_SETREGID, uintptr(rgid), uintptr(egid), 0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Setresgid(rgid int, egid int, sgid int) (err error) {
_, _, e1 := RawSyscall(SYS_SETRESGID, uintptr(rgid), uintptr(egid), uintptr(sgid))
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Setresuid(ruid int, euid int, suid int) (err error) {
_, _, e1 := RawSyscall(SYS_SETRESUID, uintptr(ruid), uintptr(euid), uintptr(suid))
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Setrlimit(resource int, rlim *Rlimit) (err error) {
_, _, e1 := RawSyscall(SYS_SETRLIMIT, uintptr(resource), uintptr(unsafe.Pointer(rlim)), 0)
if e1 != 0 {
@ -1410,16 +1380,6 @@ func Setrlimit(resource int, rlim *Rlimit) (err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Setreuid(ruid int, euid int) (err error) {
_, _, e1 := RawSyscall(SYS_SETREUID, uintptr(ruid), uintptr(euid), 0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Shutdown(fd int, how int) (err error) {
_, _, e1 := Syscall(SYS_SHUTDOWN, uintptr(fd), uintptr(how), 0)
if e1 != 0 {
@ -1549,16 +1509,6 @@ func getgroups(n int, list *_Gid_t) (nn int, err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func setgroups(n int, list *_Gid_t) (err error) {
_, _, e1 := RawSyscall(SYS_SETGROUPS, uintptr(n), uintptr(unsafe.Pointer(list)), 0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error) {
_, _, e1 := Syscall6(SYS_GETSOCKOPT, uintptr(s), uintptr(level), uintptr(name), uintptr(val), uintptr(unsafe.Pointer(vallen)), 0)
if e1 != 0 {

50
src/syscall/zsyscall_linux_riscv64.go
View file

@ -1282,36 +1282,6 @@ func Setfsuid(uid int) (err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Setregid(rgid int, egid int) (err error) {
_, _, e1 := RawSyscall(SYS_SETREGID, uintptr(rgid), uintptr(egid), 0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Setresgid(rgid int, egid int, sgid int) (err error) {
_, _, e1 := RawSyscall(SYS_SETRESGID, uintptr(rgid), uintptr(egid), uintptr(sgid))
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Setresuid(ruid int, euid int, suid int) (err error) {
_, _, e1 := RawSyscall(SYS_SETRESUID, uintptr(ruid), uintptr(euid), uintptr(suid))
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Setrlimit(resource int, rlim *Rlimit) (err error) {
_, _, e1 := RawSyscall(SYS_SETRLIMIT, uintptr(resource), uintptr(unsafe.Pointer(rlim)), 0)
if e1 != 0 {
@ -1322,16 +1292,6 @@ func Setrlimit(resource int, rlim *Rlimit) (err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Setreuid(ruid int, euid int) (err error) {
_, _, e1 := RawSyscall(SYS_SETREUID, uintptr(ruid), uintptr(euid), 0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Shutdown(fd int, how int) (err error) {
_, _, e1 := Syscall(SYS_SHUTDOWN, uintptr(fd), uintptr(how), 0)
if e1 != 0 {
@ -1446,16 +1406,6 @@ func getgroups(n int, list *_Gid_t) (nn int, err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func setgroups(n int, list *_Gid_t) (err error) {
_, _, e1 := RawSyscall(SYS_SETGROUPS, uintptr(n), uintptr(unsafe.Pointer(list)), 0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error) {
_, _, e1 := Syscall6(SYS_GETSOCKOPT, uintptr(s), uintptr(level), uintptr(name), uintptr(val), uintptr(unsafe.Pointer(vallen)), 0)
if e1 != 0 {

50
src/syscall/zsyscall_linux_s390x.go
View file

@ -1340,36 +1340,6 @@ func Setfsuid(uid int) (err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Setregid(rgid int, egid int) (err error) {
_, _, e1 := RawSyscall(SYS_SETREGID, uintptr(rgid), uintptr(egid), 0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Setresgid(rgid int, egid int, sgid int) (err error) {
_, _, e1 := RawSyscall(SYS_SETRESGID, uintptr(rgid), uintptr(egid), uintptr(sgid))
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Setresuid(ruid int, euid int, suid int) (err error) {
_, _, e1 := RawSyscall(SYS_SETRESUID, uintptr(ruid), uintptr(euid), uintptr(suid))
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Setrlimit(resource int, rlim *Rlimit) (err error) {
_, _, e1 := RawSyscall(SYS_SETRLIMIT, uintptr(resource), uintptr(unsafe.Pointer(rlim)), 0)
if e1 != 0 {
@ -1380,16 +1350,6 @@ func Setrlimit(resource int, rlim *Rlimit) (err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Setreuid(ruid int, euid int) (err error) {
_, _, e1 := RawSyscall(SYS_SETREUID, uintptr(ruid), uintptr(euid), 0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int64, err error) {
r0, _, e1 := Syscall6(SYS_SPLICE, uintptr(rfd), uintptr(unsafe.Pointer(roff)), uintptr(wfd), uintptr(unsafe.Pointer(woff)), uintptr(len), uintptr(flags))
n = int64(r0)
@ -1477,16 +1437,6 @@ func getgroups(n int, list *_Gid_t) (nn int, err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func setgroups(n int, list *_Gid_t) (err error) {
_, _, e1 := RawSyscall(SYS_SETGROUPS, uintptr(n), uintptr(unsafe.Pointer(list)), 0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func futimesat(dirfd int, path string, times *[2]Timeval) (err error) {
var _p0 *byte
_p0, err = BytePtrFromString(path)