Chiebot-Mirror
/
protobuf
mirror of https://github.com/protocolbuffers/protobuf.git
8
0
Fork 0
Code Issues Projects Releases Wiki Activity

Hoist the checks on `xform_val` out of the Mp varint parsing loops. That way we

Browse Source 
do them only once at the beginning instead of for each element.
In the past we hoisted the `rep` checks. This change continues that pattern.

PiperOrigin-RevId: 553901961
pull/13447/head
Protobuf Team Bot 1 year ago committed by Copybara-Service
parent c988759a9b
commit 4bf423b2c1
2 changed files with 165 additions and 99 deletions
Whitespace
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
Split View
Diff Options
Show Stats Download Patch File Download Diff File
  1. 4
      src/google/protobuf/generated_message_tctable_impl.h
  2. 260
      src/google/protobuf/generated_message_tctable_lite.cc

4
src/google/protobuf/generated_message_tctable_impl.h
Unescape View File

@ -894,8 +894,12 @@ class PROTOBUF_EXPORT TcParser final {
static const char* MpVarint(PROTOBUF_TC_PARAM_DECL);
template <bool is_split>
static const char* MpRepeatedVarint(PROTOBUF_TC_PARAM_DECL);
template <bool is_split, typename FieldType, uint16_t xform_val>
static const char* MpRepeatedVarintT(PROTOBUF_TC_PARAM_DECL);
template <bool is_split>
static const char* MpPackedVarint(PROTOBUF_TC_PARAM_DECL);
template <bool is_split, typename FieldType, uint16_t xform_val>
static const char* MpPackedVarintT(PROTOBUF_TC_PARAM_DECL);
template <bool is_split>
static const char* MpFixed(PROTOBUF_TC_PARAM_DECL);
template <bool is_split>

260
src/google/protobuf/generated_message_tctable_lite.cc
Unescape View File

@ -29,6 +29,7 @@
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include <algorithm>
#include <cstddef>
#include <cstdint>
#include <limits>
#include <numeric>
@ -38,7 +39,9 @@
#include "absl/base/optimization.h"
#include "absl/log/absl_check.h"
#include "absl/log/absl_log.h"
#include "absl/numeric/bits.h"
#include "absl/strings/string_view.h"
#include "google/protobuf/generated_message_tctable_decl.h"
#include "google/protobuf/generated_message_tctable_impl.h"
#include "google/protobuf/inlined_string_field.h"
@ -1984,13 +1987,56 @@ PROTOBUF_NOINLINE const char* TcParser::MpVarint(PROTOBUF_TC_PARAM_DECL) {
PROTOBUF_MUSTTAIL return ToTagDispatch(PROTOBUF_TC_PARAM_NO_DATA_PASS);
}
template <bool is_split, typename FieldType, uint16_t xform_val_in>
const char* TcParser::MpRepeatedVarintT(PROTOBUF_TC_PARAM_DECL) {
const auto& entry = RefAt<FieldEntry>(table, data.entry_offset());
const uint32_t decoded_tag = data.tag();
// For is_split we ignore the incoming xform_val and read it from entry to
// reduce duplication for the uncommon paths.
const uint16_t xform_val =
is_split ? (entry.type_card & field_layout::kTvMask) : xform_val_in;
const bool is_zigzag = xform_val == field_layout::kTvZigZag;
const bool is_validated_enum = xform_val & field_layout::kTvEnum;
const char* ptr2 = ptr;
uint32_t next_tag;
void* const base = MaybeGetSplitBase(msg, is_split, table);
auto& field = MaybeCreateRepeatedFieldRefAt<FieldType, is_split>(
base, entry.offset, msg);
do {
uint64_t tmp;
ptr = ParseVarint(ptr2, &tmp);
if (PROTOBUF_PREDICT_FALSE(ptr == nullptr)) goto error;
if (is_validated_enum) {
if (!EnumIsValidAux(static_cast<int32_t>(tmp), xform_val,
*table->field_aux(&entry))) {
ptr = ptr2;
PROTOBUF_MUSTTAIL return MpUnknownEnumFallback(PROTOBUF_TC_PARAM_PASS);
}
} else if (is_zigzag) {
tmp = sizeof(FieldType) == 8 ? WireFormatLite::ZigZagDecode64(tmp)
: WireFormatLite::ZigZagDecode32(tmp);
}
field.Add(static_cast<FieldType>(tmp));
if (PROTOBUF_PREDICT_FALSE(!ctx->DataAvailable(ptr))) goto parse_loop;
ptr2 = ReadTag(ptr, &next_tag);
if (PROTOBUF_PREDICT_FALSE(ptr2 == nullptr)) goto error;
} while (next_tag == decoded_tag);
parse_loop:
PROTOBUF_MUSTTAIL return ToParseLoop(PROTOBUF_TC_PARAM_NO_DATA_PASS);
error:
PROTOBUF_MUSTTAIL return Error(PROTOBUF_TC_PARAM_NO_DATA_PASS);
}
template <bool is_split>
PROTOBUF_NOINLINE const char* TcParser::MpRepeatedVarint(
PROTOBUF_TC_PARAM_DECL) {
const auto& entry = RefAt<FieldEntry>(table, data.entry_offset());
auto type_card = entry.type_card;
const auto type_card = entry.type_card;
const uint32_t decoded_tag = data.tag();
auto decoded_wiretype = decoded_tag & 7;
const auto decoded_wiretype = decoded_tag & 7;
// Check for packed repeated fallback:
if (decoded_wiretype == WireFormatLite::WIRETYPE_LENGTH_DELIMITED) {
@ -2000,127 +2046,143 @@ PROTOBUF_NOINLINE const char* TcParser::MpRepeatedVarint(
if (decoded_wiretype != WireFormatLite::WIRETYPE_VARINT) {
PROTOBUF_MUSTTAIL return table->fallback(PROTOBUF_TC_PARAM_PASS);
}
uint16_t xform_val = (type_card & field_layout::kTvMask);
// For split we avoid the duplicate code and have the impl reload the value.
// Less code bloat for uncommon paths.
const uint16_t xform_val = (type_card & field_layout::kTvMask);
const uint16_t rep = type_card & field_layout::kRepMask;
switch (rep >> field_layout::kRepShift) {
case field_layout::kRep64Bits >> field_layout::kRepShift:
if (xform_val == 0) {
PROTOBUF_MUSTTAIL return MpRepeatedVarintT<is_split, uint64_t, 0>(
PROTOBUF_TC_PARAM_PASS);
} else {
ABSL_DCHECK_EQ(xform_val, +field_layout::kTvZigZag);
PROTOBUF_MUSTTAIL return MpRepeatedVarintT<
is_split, uint64_t, (is_split ? 0 : field_layout::kTvZigZag)>(
PROTOBUF_TC_PARAM_PASS);
}
case field_layout::kRep32Bits >> field_layout::kRepShift:
switch (xform_val >> field_layout::kTvShift) {
case 0:
PROTOBUF_MUSTTAIL return MpRepeatedVarintT<is_split, uint32_t, 0>(
PROTOBUF_TC_PARAM_PASS);
case field_layout::kTvZigZag >> field_layout::kTvShift:
PROTOBUF_MUSTTAIL return MpRepeatedVarintT<
is_split, uint32_t, (is_split ? 0 : field_layout::kTvZigZag)>(
PROTOBUF_TC_PARAM_PASS);
case field_layout::kTvEnum >> field_layout::kTvShift:
PROTOBUF_MUSTTAIL return MpRepeatedVarintT<
is_split, uint32_t, (is_split ? 0 : field_layout::kTvEnum)>(
PROTOBUF_TC_PARAM_PASS);
case field_layout::kTvRange >> field_layout::kTvShift:
PROTOBUF_MUSTTAIL return MpRepeatedVarintT<
is_split, uint32_t, (is_split ? 0 : field_layout::kTvRange)>(
PROTOBUF_TC_PARAM_PASS);
default:
PROTOBUF_ASSUME(false);
}
case field_layout::kRep8Bits >> field_layout::kRepShift:
PROTOBUF_MUSTTAIL return MpRepeatedVarintT<is_split, bool, 0>(
PROTOBUF_TC_PARAM_PASS);
default:
PROTOBUF_ASSUME(false);
}
}
template <bool is_split, typename FieldType, uint16_t xform_val_in>
const char* TcParser::MpPackedVarintT(PROTOBUF_TC_PARAM_DECL) {
const auto& entry = RefAt<FieldEntry>(table, data.entry_offset());
// For is_split we ignore the incoming xform_val and read it from entry to
// reduce duplication for the uncommon paths.
const uint16_t xform_val =
is_split ? (entry.type_card & field_layout::kTvMask) : xform_val_in;
const bool is_zigzag = xform_val == field_layout::kTvZigZag;
const bool is_validated_enum = xform_val & field_layout::kTvEnum;
void* const base = MaybeGetSplitBase(msg, is_split, table);
uint16_t rep = type_card & field_layout::kRepMask;
if (rep == field_layout::kRep64Bits) {
auto& field = MaybeCreateRepeatedFieldRefAt<uint64_t, is_split>(
base, entry.offset, msg);
const char* ptr2 = ptr;
uint32_t next_tag;
do {
uint64_t tmp;
ptr = ParseVarint(ptr2, &tmp);
if (PROTOBUF_PREDICT_FALSE(ptr == nullptr)) goto error;
field.Add(is_zigzag ? WireFormatLite::ZigZagDecode64(tmp) : tmp);
if (PROTOBUF_PREDICT_FALSE(!ctx->DataAvailable(ptr))) goto parse_loop;
ptr2 = ReadTag(ptr, &next_tag);
if (PROTOBUF_PREDICT_FALSE(ptr2 == nullptr)) goto error;
} while (next_tag == decoded_tag);
} else if (rep == field_layout::kRep32Bits) {
auto& field = MaybeCreateRepeatedFieldRefAt<uint32_t, is_split>(
base, entry.offset, msg);
const char* ptr2 = ptr;
uint32_t next_tag;
do {
uint64_t tmp;
ptr = ParseVarint(ptr2, &tmp);
if (PROTOBUF_PREDICT_FALSE(ptr == nullptr)) goto error;
if (is_validated_enum) {
if (!EnumIsValidAux(tmp, xform_val, *table->field_aux(&entry))) {
ptr = ptr2;
PROTOBUF_MUSTTAIL return MpUnknownEnumFallback(
PROTOBUF_TC_PARAM_PASS);
}
} else if (is_zigzag) {
tmp = WireFormatLite::ZigZagDecode32(tmp);
auto* field = &MaybeCreateRepeatedFieldRefAt<FieldType, is_split>(
base, entry.offset, msg);
if (is_validated_enum) {
const TcParseTableBase::FieldAux aux = *table->field_aux(entry.aux_idx);
return ctx->ReadPackedVarint(ptr, [=](int32_t value) {
if (!EnumIsValidAux(value, xform_val, aux)) {
AddUnknownEnum(msg, table, data.tag(), value);
} else {
field->Add(value);
}
field.Add(tmp);
if (PROTOBUF_PREDICT_FALSE(!ctx->DataAvailable(ptr))) goto parse_loop;
ptr2 = ReadTag(ptr, &next_tag);
if (PROTOBUF_PREDICT_FALSE(ptr2 == nullptr)) goto error;
} while (next_tag == decoded_tag);
});
} else {
ABSL_DCHECK_EQ(rep, static_cast<uint16_t>(field_layout::kRep8Bits));
auto& field =
MaybeCreateRepeatedFieldRefAt<bool, is_split>(base, entry.offset, msg);
const char* ptr2 = ptr;
uint32_t next_tag;
do {
uint64_t tmp;
ptr = ParseVarint(ptr2, &tmp);
if (PROTOBUF_PREDICT_FALSE(ptr == nullptr)) goto error;
field.Add(static_cast<bool>(tmp));
if (PROTOBUF_PREDICT_FALSE(!ctx->DataAvailable(ptr))) goto parse_loop;
ptr2 = ReadTag(ptr, &next_tag);
if (PROTOBUF_PREDICT_FALSE(ptr2 == nullptr)) goto error;
} while (next_tag == decoded_tag);
return ctx->ReadPackedVarint(ptr, [=](uint64_t value) {
field->Add(is_zigzag ? (sizeof(FieldType) == 8
? WireFormatLite::ZigZagDecode64(value)
: WireFormatLite::ZigZagDecode32(
static_cast<uint32_t>(value)))
: value);
});
}
PROTOBUF_MUSTTAIL return ToTagDispatch(PROTOBUF_TC_PARAM_NO_DATA_PASS);
parse_loop:
PROTOBUF_MUSTTAIL return ToParseLoop(PROTOBUF_TC_PARAM_NO_DATA_PASS);
error:
PROTOBUF_MUSTTAIL return Error(PROTOBUF_TC_PARAM_NO_DATA_PASS);
}
template <bool is_split>
PROTOBUF_NOINLINE const char* TcParser::MpPackedVarint(PROTOBUF_TC_PARAM_DECL) {
const auto& entry = RefAt<FieldEntry>(table, data.entry_offset());
auto type_card = entry.type_card;
auto decoded_wiretype = data.tag() & 7;
const auto type_card = entry.type_card;
const auto decoded_wiretype = data.tag() & 7;
// Check for non-packed repeated fallback:
if (decoded_wiretype != WireFormatLite::WIRETYPE_LENGTH_DELIMITED) {
PROTOBUF_MUSTTAIL return MpRepeatedVarint<is_split>(PROTOBUF_TC_PARAM_PASS);
}
// For split we avoid the duplicate code and have the impl reload the value.
// Less code bloat for uncommon paths.
const uint16_t xform_val = (type_card & field_layout::kTvMask);
const bool is_zigzag = xform_val == field_layout::kTvZigZag;
const bool is_validated_enum = xform_val & field_layout::kTvEnum;
// Since ctx->ReadPackedFixed does not use TailCall<> or Return<>, sync any
// pending hasbits now:
SyncHasbits(msg, hasbits, table);
void* const base = MaybeGetSplitBase(msg, is_split, table);
uint16_t rep = type_card & field_layout::kRepMask;
if (rep == field_layout::kRep64Bits) {
auto* field = &MaybeCreateRepeatedFieldRefAt<uint64_t, is_split>(
base, entry.offset, msg);
return ctx->ReadPackedVarint(ptr, [field, is_zigzag](uint64_t value) {
field->Add(is_zigzag ? WireFormatLite::ZigZagDecode64(value) : value);
});
} else if (rep == field_layout::kRep32Bits) {
auto* field = &MaybeCreateRepeatedFieldRefAt<uint32_t, is_split>(
base, entry.offset, msg);
if (is_validated_enum) {
const TcParseTableBase::FieldAux aux = *table->field_aux(entry.aux_idx);
return ctx->ReadPackedVarint(ptr, [=](int32_t value) {
if (!EnumIsValidAux(value, xform_val, aux)) {
AddUnknownEnum(msg, table, data.tag(), value);
} else {
field->Add(value);
}
});
} else {
return ctx->ReadPackedVarint(ptr, [field, is_zigzag](uint64_t value) {
field->Add(is_zigzag ? WireFormatLite::ZigZagDecode32(
static_cast<uint32_t>(value))
: value);
});
}
} else {
ABSL_DCHECK_EQ(rep, static_cast<uint16_t>(field_layout::kRep8Bits));
auto* field =
&MaybeCreateRepeatedFieldRefAt<bool, is_split>(base, entry.offset, msg);
return ctx->ReadPackedVarint(
ptr, [field](uint64_t value) { field->Add(static_cast<bool>(value)); });
}
const uint16_t rep = type_card & field_layout::kRepMask;
PROTOBUF_MUSTTAIL return Error(PROTOBUF_TC_PARAM_NO_DATA_PASS);
switch (rep >> field_layout::kRepShift) {
case field_layout::kRep64Bits >> field_layout::kRepShift:
if (xform_val == 0) {
PROTOBUF_MUSTTAIL return MpPackedVarintT<is_split, uint64_t, 0>(
PROTOBUF_TC_PARAM_PASS);
} else {
ABSL_DCHECK_EQ(xform_val, +field_layout::kTvZigZag);
PROTOBUF_MUSTTAIL return MpPackedVarintT<
is_split, uint64_t, (is_split ? 0 : field_layout::kTvZigZag)>(
PROTOBUF_TC_PARAM_PASS);
}
case field_layout::kRep32Bits >> field_layout::kRepShift:
switch (xform_val >> field_layout::kTvShift) {
case 0:
PROTOBUF_MUSTTAIL return MpPackedVarintT<is_split, uint32_t, 0>(
PROTOBUF_TC_PARAM_PASS);
case field_layout::kTvZigZag >> field_layout::kTvShift:
PROTOBUF_MUSTTAIL return MpPackedVarintT<
is_split, uint32_t, (is_split ? 0 : field_layout::kTvZigZag)>(
PROTOBUF_TC_PARAM_PASS);
case field_layout::kTvEnum >> field_layout::kTvShift:
PROTOBUF_MUSTTAIL return MpPackedVarintT<
is_split, uint32_t, (is_split ? 0 : field_layout::kTvEnum)>(
PROTOBUF_TC_PARAM_PASS);
case field_layout::kTvRange >> field_layout::kTvShift:
PROTOBUF_MUSTTAIL return MpPackedVarintT<
is_split, uint32_t, (is_split ? 0 : field_layout::kTvRange)>(
PROTOBUF_TC_PARAM_PASS);
default:
PROTOBUF_ASSUME(false);
}
case field_layout::kRep8Bits >> field_layout::kRepShift:
PROTOBUF_MUSTTAIL return MpPackedVarintT<is_split, bool, 0>(
PROTOBUF_TC_PARAM_PASS);
default:
PROTOBUF_ASSUME(false);
}
}
bool TcParser::MpVerifyUtf8(absl::string_view wire_bytes,

Write Preview
Loading…
Cancel
Save