windows: use GOARCH-specific JOBOBJECT_BASIC_LIMIT_INFORMATION

The Windows compilers appear to align JOBOBJECT_BASIC_LIMIT_INFORMATION
to an 8-byte boundary, which on 32-bit systems means adding 32 bits of
padding. Unfortunately we can't always add a padding field, because
no padding is required on a 64-bit system. So use different versions
of the struct for different targets.

Fixes golang/go#41001

Change-Id: I38d14edfd3f3a80da22825455f20e1f7de136638
Reviewed-on: https://go-review.googlesource.com/c/sys/+/251197
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Marc-Antoine Ruel <maruel@google.com>
Reviewed-by: Alex Brainman <alex.brainman@gmail.com>

windows/types_windows.go

@@ -1584,18 +1584,6 @@ const (
 	JOB_OBJECT_LIMIT_WORKINGSET                 = 0x00000001
 )
 
-type JOBOBJECT_BASIC_LIMIT_INFORMATION struct {
-	PerProcessUserTimeLimit int64
-	PerJobUserTimeLimit     int64
-	LimitFlags              uint32
-	MinimumWorkingSetSize   uintptr
-	MaximumWorkingSetSize   uintptr
-	ActiveProcessLimit      uint32
-	Affinity                uintptr
-	PriorityClass           uint32
-	SchedulingClass         uint32
-}
-
 type IO_COUNTERS struct {
 	ReadOperationCount  uint64
 	WriteOperationCount uint64

windows/types_windows_386.go

@@ -20,3 +20,16 @@ type Servent struct {
 	Port    uint16
 	Proto   *byte
 }
+
+type JOBOBJECT_BASIC_LIMIT_INFORMATION struct {
+	PerProcessUserTimeLimit int64
+	PerJobUserTimeLimit     int64
+	LimitFlags              uint32
+	MinimumWorkingSetSize   uintptr
+	MaximumWorkingSetSize   uintptr
+	ActiveProcessLimit      uint32
+	Affinity                uintptr
+	PriorityClass           uint32
+	SchedulingClass         uint32
+	_                       uint32 // pad to 8 byte boundary
+}

windows/types_windows_amd64.go

@@ -20,3 +20,15 @@ type Servent struct {
 	Proto   *byte
 	Port    uint16
 }
+
+type JOBOBJECT_BASIC_LIMIT_INFORMATION struct {
+	PerProcessUserTimeLimit int64
+	PerJobUserTimeLimit     int64
+	LimitFlags              uint32
+	MinimumWorkingSetSize   uintptr
+	MaximumWorkingSetSize   uintptr
+	ActiveProcessLimit      uint32
+	Affinity                uintptr
+	PriorityClass           uint32
+	SchedulingClass         uint32
+}

windows/types_windows_arm.go

@@ -20,3 +20,16 @@ type Servent struct {
 	Port    uint16
 	Proto   *byte
 }
+
+type JOBOBJECT_BASIC_LIMIT_INFORMATION struct {
+	PerProcessUserTimeLimit int64
+	PerJobUserTimeLimit     int64
+	LimitFlags              uint32
+	MinimumWorkingSetSize   uintptr
+	MaximumWorkingSetSize   uintptr
+	ActiveProcessLimit      uint32
+	Affinity                uintptr
+	PriorityClass           uint32
+	SchedulingClass         uint32
+	_                       uint32 // pad to 8 byte boundary
+}