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runtime: check for errors returned by windows sema calls

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Add checks for failure of CreateEvent, SetEvent or
WaitForSingleObject. Any failures are considered fatal and
will throw() after printing an informative message.

Updates #16646

Change-Id: I3bacf9001d2abfa8667cc3aff163ff2de1c99915
Reviewed-on: https://go-review.googlesource.com/26655
Reviewed-by: Russ Cox <rsc@golang.org>
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
This commit is contained in:
Joshua Boelter 2016-08-09 22:37:26 -07:00 committed by Russ Cox
parent 9d36ab222d
commit 1a3b739b26
1 changed files with 47 additions and 4 deletions
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51
src/runtime/os_windows.go
View file

@ -437,6 +437,13 @@ func writeConsoleUTF16(handle uintptr, b []uint16) {
//go:nosplit
func semasleep(ns int64) int32 {
const (
_WAIT_ABANDONED = 0x00000080
_WAIT_OBJECT_0 = 0x00000000
_WAIT_TIMEOUT = 0x00000102
_WAIT_FAILED = 0xFFFFFFFF
)
// store ms in ns to save stack space
if ns < 0 {
ns = _INFINITE
@ -446,15 +453,44 @@ func semasleep(ns int64) int32 {
ns = 1
}
}
if stdcall2(_WaitForSingleObject, getg().m.waitsema, uintptr(ns)) != 0 {
return -1 // timeout
result := stdcall2(_WaitForSingleObject, getg().m.waitsema, uintptr(ns))
switch result {
case _WAIT_OBJECT_0: //signaled
return 0
case _WAIT_TIMEOUT:
return -1
case _WAIT_ABANDONED:
systemstack(func() {
throw("runtime.semasleep wait_abandoned")
})
case _WAIT_FAILED:
systemstack(func() {
print("runtime: waitforsingleobject wait_failed; errno=", getlasterror(), "\n")
throw("runtime.semasleep wait_failed")
})
default:
systemstack(func() {
print("runtime: waitforsingleobject unexpected; result=", result, "\n")
throw("runtime.semasleep unexpected")
})
}
return 0
return -1 // unreachable
}
//go:nosplit
func semawakeup(mp *m) {
stdcall1(_SetEvent, mp.waitsema)
if stdcall1(_SetEvent, mp.waitsema) == 0 {
systemstack(func() {
print("runtime: setevent failed; errno=", getlasterror(), "\n")
throw("runtime.semawakeup")
})
}
}
//go:nosplit
@ -463,6 +499,12 @@ func semacreate(mp *m) {
return
}
mp.waitsema = stdcall4(_CreateEventA, 0, 0, 0, 0)
if mp.waitsema == 0 {
systemstack(func() {
print("runtime: createevent failed; errno=", getlasterror(), "\n")
throw("runtime.semacreate")
})
}
}
// May run with m.p==nil, so write barriers are not allowed. This
@ -475,6 +517,7 @@ func newosproc(mp *m, stk unsafe.Pointer) {
thandle := stdcall6(_CreateThread, 0, 0x20000,
funcPC(tstart_stdcall), uintptr(unsafe.Pointer(mp)),
_STACK_SIZE_PARAM_IS_A_RESERVATION, 0)
if thandle == 0 {
print("runtime: failed to create new OS thread (have ", mcount(), " already; errno=", getlasterror(), ")\n")
throw("runtime.newosproc")