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pkg/etw: Fix to build on windows/arm

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We don't support actually using ETW on windows/arm, but to make things
easier for downstream dependencies, we want to still allow the package
to compile and just no-op on this architecture. We do this by returning
a nil Provider, and implementing its methods to no-op when the receiver
is nil.

Previously this was implemented by putting NewProviderWithID in
provider_unsupported.go, but when we refactored the code so that the
actual work was done in NewProviderWithOptions instead, we didn't fix up
provider_unsupported. This change fixes this by putting only
NewProviderWithOptions in provider_unsupported.go, since the other
provider creation functions call into this one.

Signed-off-by: Kevin Parsons <kevpar@microsoft.com>
This commit is contained in:
Kevin Parsons
2021-03-24 15:05:25 -07:00
parent 6eac466e5f
commit 941861fe1a
3 changed files with 41 additions and 45 deletions
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pkg/etw/newprovider.go
-40
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@@ -12,46 +12,6 @@ import (
"golang.org/x/sys/windows"
)
type providerOpts struct {
callback EnableCallback
id guid.GUID
group guid.GUID
}
// ProviderOpt allows the caller to specify provider options to
// NewProviderWithOptions
type ProviderOpt func(*providerOpts)
// WithCallback is used to provide a callback option to NewProviderWithOptions
func WithCallback(callback EnableCallback) ProviderOpt {
return func(opts *providerOpts) {
opts.callback = callback
}
}
// WithID is used to provide a provider ID option to NewProviderWithOptions
func WithID(id guid.GUID) ProviderOpt {
return func(opts *providerOpts) {
opts.id = id
}
}
// WithGroup is used to provide a provider group option to
// NewProviderWithOptions
func WithGroup(group guid.GUID) ProviderOpt {
return func(opts *providerOpts) {
opts.group = group
}
}
// NewProviderWithID creates and registers a new ETW provider, allowing the
// provider ID to be manually specified. This is most useful when there is an
// existing provider ID that must be used to conform to existing diagnostic
// infrastructure.
func NewProviderWithID(name string, id guid.GUID, callback EnableCallback) (provider *Provider, err error) {
return NewProviderWithOptions(name, WithID(id), WithCallback(callback))
}
// NewProviderWithOptions creates and registers a new ETW provider, allowing
// the provider ID and Group to be manually specified. This is most useful when
// there is an existing provider ID that must be used to conform to existing