Enumerations

enum class ProtoWireType : uint32_t

enum class ProtoSchemaType

enum class RepetitionType

Records

• class FieldMetadata

• class FieldMetadataBase

Functions

• const char * ProtoSchemaToString (ProtoSchemaType v)

  Defined at line 111 of file ../../third_party/perfetto/include/perfetto/protozero/proto_utils.h

• ProtoWireType ProtoSchemaToWireType (ProtoSchemaType v)

  Returns the wire type used on the wire to encode a field of the given

  schema type. This is the single source of truth for the proto-type ->

  wire-type grouping. kGroup is a deprecated proto2-only feature that

  protozero does not support and that ProtoWireType cannot represent; it,

  like kUnknown, maps to kLengthDelimited as a safe opaque default.

  Defined at line 162 of file ../../third_party/perfetto/include/perfetto/protozero/proto_utils.h

• uint64_t GetTagFieldId (uint64_t tag)

  Defined at line 206 of file ../../third_party/perfetto/include/perfetto/protozero/proto_utils.h

• uint64_t GetTagFieldType (uint64_t tag)

  Defined at line 212 of file ../../third_party/perfetto/include/perfetto/protozero/proto_utils.h

• uint32_t MakeTagVarInt (uint32_t field_id)

  Proto types: (int|uint|sint)(32|64), bool, enum.

  Defined at line 220 of file ../../third_party/perfetto/include/perfetto/protozero/proto_utils.h

• template <typename T>

  uint32_t MakeTagFixed (uint32_t field_id)

  Proto types: fixed64, sfixed64, fixed32, sfixed32, double, float.

  Defined at line 226 of file ../../third_party/perfetto/include/perfetto/protozero/proto_utils.h

• uint32_t MakeTagLengthDelimited (uint32_t field_id)

  Proto types: string, bytes, embedded messages.

  Defined at line 234 of file ../../third_party/perfetto/include/perfetto/protozero/proto_utils.h

• uint32_t MakeTagStartGroup (uint32_t field_id)

  Opens a nested message in the proto group encoding described above.

  Defined at line 240 of file ../../third_party/perfetto/include/perfetto/protozero/proto_utils.h

• template <typename T>

  typename std::make_unsigned<T>::type ZigZagEncode (T value)

  Proto types: sint64, sint32.

  Defined at line 246 of file ../../third_party/perfetto/include/perfetto/protozero/proto_utils.h

• template <typename T>

  typename std::make_signed<T>::type ZigZagDecode (T value)

  Proto types: sint64, sint32.

  Defined at line 267 of file ../../third_party/perfetto/include/perfetto/protozero/proto_utils.h

• template <typename T>

  typename std::make_unsigned<typename std::conditional<std::is_unsigned<T>::value, T, int64_t>::type>::type ExtendValueForVarIntSerialization (T value)

  Defined at line 276 of file ../../third_party/perfetto/include/perfetto/protozero/proto_utils.h

• template <typename T>

  uint8_t * WriteVarInt (T value, uint8_t * target)

  Defined at line 302 of file ../../third_party/perfetto/include/perfetto/protozero/proto_utils.h

• void WriteRedundantVarInt (uint32_t value, uint8_t * buf, size_t size)

  Writes a fixed-size redundant encoding of the given |value|. This is

  used to backfill fixed-size reservations for the length field using a

  non-canonical varint encoding (e.g.

  instead of

  ).

  See https://github.com/google/protobuf/issues/1530.

  This is used mainly in two cases:

  1) At trace writing time, when starting a nested messages. The size of a

  nested message is not known until all its field have been written.

  |kMessageLengthFieldSize| bytes are reserved to encode the size field and

  backfilled at the end.

  2) When rewriting a message at trace filtering time, in protozero/filtering.

  At that point we know only the upper bound of the length (a filtered

  message is

  <

  = the original one) and we backfill after the message has been

  filtered.

  Defined at line 326 of file ../../third_party/perfetto/include/perfetto/protozero/proto_utils.h

• template <uint32_t field_id>

  void StaticAssertSingleBytePreamble ()

  Defined at line 337 of file ../../third_party/perfetto/include/perfetto/protozero/proto_utils.h

• const uint8_t * ParseVarInt (const uint8_t * start, const uint8_t * end, uint64_t * out_value)

  Parses a VarInt from the encoded buffer [start, end). |end| is STL-style and

  points one byte past the end of buffer.

  The parsed int value is stored in the output arg |value|. Returns a pointer

  to the next unconsumed byte (so start

  <

  retval

  <

  = end) or |start| if the

  VarInt could not be fully parsed because there was not enough space in the

  buffer.

  Defined at line 348 of file ../../third_party/perfetto/include/perfetto/protozero/proto_utils.h

• const uint8_t * ParseVarIntUnrolled (const uint8_t * p, uint64_t * out)

  Unrolled multi-byte varint decode. Avoids the per-byte bounds-check + loop

  branch of ParseVarInt, which matters for long varints (e.g. ftrace

  timestamps are 8-10 bytes). The caller must guarantee at least 10 readable

  bytes at |p| and that p[0] has the continuation bit set. Returns nullptr on

  an overlong (> 10 byte) varint. The 10th byte contributes only its low bit

  (matching ParseVarInt).

  Defined at line 360 of file ../../third_party/perfetto/include/perfetto/protozero/proto_utils.h

• const uint8_t * ParseVarIntFast (const uint8_t * pos, const uint8_t * end, uint64_t * out)

  Decodes a varint at |pos|: single-byte fastpath, then the unrolled decode

  when there is enough headroom, then the bounded byte-loop near the end of the

  buffer. Returns nullptr on a truncated/overlong varint (note: unlike

  ParseVarInt, which returns |pos| on failure).

  Prefer ParseVarInt() in non-hot code. This is force-inlined and expands the

  unrolled decoder at every call site (~415 vs ~80 bytes for a ParseVarInt call

  in our measurements), so widespread use bloats the binary. Use it only inside

  perf-critical decode loops.

  Defined at line 393 of file ../../third_party/perfetto/include/perfetto/protozero/proto_utils.h