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[XRay] Remove array for Metadata Record Types

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This simplifies the implementation of the metadata lookup by using
scoped enums, rather than using enum classes. This way we can get the
number-name mapping without having to resort to comments.

Follow-up to D51289.

llvm-svn: 341205
This commit is contained in:
Dean Michael Berris 2018-08-31 11:41:08 +00:00
parent c68b38b9f3
commit 53982eabea
1 changed files with 28 additions and 40 deletions
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60
lib/XRay/FDRRecordProducer.cpp
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@ -14,66 +14,54 @@ namespace xray {
namespace {
Expected<std::unique_ptr<Record>>
metadataRecordType(const XRayFileHeader &Header, uint8_t T) {
// Keep this in sync with the values written in the XRay FDR mode runtime in
// compiler-rt.
enum class MetadataRecordKinds : uint8_t {
NewBuffer,
EndOfBuffer,
NewCPUId,
TSCWrap,
WalltimeMarker,
CustomEventMarker,
CallArgument,
BufferExtents,
TypedEventMarker,
Pid,
enum MetadataRecordKinds : uint8_t {
NewBufferKind,
EndOfBufferKind,
NewCPUIdKind,
TSCWrapKind,
WalltimeMarkerKind,
CustomEventMarkerKind,
CallArgumentKind,
BufferExtentsKind,
TypedEventMarkerKind,
PidKind,
// This is an end marker, used to identify the upper bound for this enum.
EnumEndMarker,
};
Expected<std::unique_ptr<Record>>
metadataRecordType(const XRayFileHeader &Header, uint8_t T) {
if (T >= static_cast<uint8_t>(MetadataRecordKinds::EnumEndMarker))
return createStringError(std::make_error_code(std::errc::invalid_argument),
"Invalid metadata record type: %d", T);
static constexpr MetadataRecordKinds Mapping[] = {
MetadataRecordKinds::NewBuffer,
MetadataRecordKinds::EndOfBuffer,
MetadataRecordKinds::NewCPUId,
MetadataRecordKinds::TSCWrap,
MetadataRecordKinds::WalltimeMarker,
MetadataRecordKinds::CustomEventMarker,
MetadataRecordKinds::CallArgument,
MetadataRecordKinds::BufferExtents,
MetadataRecordKinds::TypedEventMarker,
MetadataRecordKinds::Pid,
};
switch (Mapping[T]) {
case MetadataRecordKinds::NewBuffer:
switch (T) {
case MetadataRecordKinds::NewBufferKind:
return make_unique<NewBufferRecord>();
case MetadataRecordKinds::EndOfBuffer:
case MetadataRecordKinds::EndOfBufferKind:
if (Header.Version >= 2)
return createStringError(
std::make_error_code(std::errc::executable_format_error),
"End of buffer records are no longer supported starting version "
"2 of the log.");
return make_unique<EndBufferRecord>();
case MetadataRecordKinds::NewCPUId:
case MetadataRecordKinds::NewCPUIdKind:
return make_unique<NewCPUIDRecord>();
case MetadataRecordKinds::TSCWrap:
case MetadataRecordKinds::TSCWrapKind:
return make_unique<TSCWrapRecord>();
case MetadataRecordKinds::WalltimeMarker:
case MetadataRecordKinds::WalltimeMarkerKind:
return make_unique<WallclockRecord>();
case MetadataRecordKinds::CustomEventMarker:
case MetadataRecordKinds::CustomEventMarkerKind:
return make_unique<CustomEventRecord>();
case MetadataRecordKinds::CallArgument:
case MetadataRecordKinds::CallArgumentKind:
return make_unique<CallArgRecord>();
case MetadataRecordKinds::BufferExtents:
case MetadataRecordKinds::BufferExtentsKind:
return make_unique<BufferExtents>();
case MetadataRecordKinds::TypedEventMarker:
case MetadataRecordKinds::TypedEventMarkerKind:
return createStringError(std::make_error_code(std::errc::invalid_argument),
"Encountered an unsupported TypedEventMarker.");
case MetadataRecordKinds::Pid:
case MetadataRecordKinds::PidKind:
return make_unique<PIDRecord>();
case MetadataRecordKinds::EnumEndMarker:
llvm_unreachable("Invalid MetadataRecordKind");