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win_perf_counters: Format errors reported by pdh.dll in human-readable format (#2338)

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This commit is contained in:
Oleg Grytsynevych
2017-04-20 20:22:44 +02:00
committed by Daniel Nelson
parent 748ca7d503
commit b03d78d00f
2 changed files with 17 additions and 5 deletions
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13
plugins/inputs/win_perf_counters/pdh.go
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@@ -33,8 +33,11 @@
package win_perf_counters
import (
"fmt"
"syscall"
"unsafe"
"golang.org/x/sys/windows"
)
// Error codes
@@ -417,3 +420,13 @@ func UTF16PtrToString(s *uint16) string {
}
return syscall.UTF16ToString((*[1 << 29]uint16)(unsafe.Pointer(s))[0:])
}
func PdhFormatError(msgId uint32) string {
var flags uint32 = windows.FORMAT_MESSAGE_FROM_HMODULE | windows.FORMAT_MESSAGE_ARGUMENT_ARRAY | windows.FORMAT_MESSAGE_IGNORE_INSERTS
buf := make([]uint16, 300)
_, err := windows.FormatMessage(flags, uintptr(libpdhDll.Handle), msgId, 0, buf, nil)
if err == nil {
return fmt.Sprintf("%s", UTF16PtrToString(&buf[0]))
}
return fmt.Sprintf("(pdhErr=%d) %s", msgId, err.Error())
}