headers: fail Build on missing native exports and assert MI/COM layouts (#2739)

Signed-off-by: Jan-Otto Kröpke <mail@jkroepke.de>

internal/collector/hyperv/hyperv.go

@@ -233,9 +233,11 @@ func (c *Collector) Build(logger *slog.Logger, miSession *mi.Session) error {
 			close:   func() { c.perfDataCollectorDynamicMemoryVM.Close() },
 		},
 		subCollectorHost: {
-			build:   c.buildHost,
-			collect: c.collectHost,
-			close:   func() { c.perfDataCollectorLogicalProcessor.Close() },
+			// The Host Compute Service API (computecore.dll) exists since 1809.
+			minBuildNumber: osversion.LTSC2019,
+			build:          c.buildHost,
+			collect:        c.collectHost,
+			close:          func() { c.perfDataCollectorLogicalProcessor.Close() },
 		},
 		subCollectorHypervisorLogicalProcessor: {
 			build:   c.buildHypervisorLogicalProcessor,

internal/collector/hyperv/hyperv_host.go

@@ -70,6 +70,10 @@ type vmVirtualNode struct {
 }
 
 func (c *Collector) buildHost() error {
+	if err := hcs.Load(); err != nil {
+		return err
+	}
+
 	var err error
 
 	c.perfDataCollectorLogicalProcessor, err = pdh.NewCollector[perfDataCounterValuesHost](c.logger, pdh.CounterTypeRaw, "Hyper-V Hypervisor Logical Processor", pdh.InstancesAll)

internal/collector/hyperv/hyperv_wmi_health.go

@@ -52,6 +52,10 @@ func (c *Collector) buildWMIHealth() error {
 		return mi.ErrNotInitialized
 	}
 
+	if err := sysinfoapi.Load(); err != nil {
+		return err
+	}
+
 	// The host's Msvm_ComputerSystem is named after the physical NetBIOS name.
 	// Caption is localized, so it can't be used to select the host.
 	hostname, err := sysinfoapi.GetComputerName(sysinfoapi.ComputerNamePhysicalNetBIOS)