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blob_serializer_deserializer-inl.h
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385 lines (327 loc) · 11.2 KB
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#ifndef SRC_BLOB_SERIALIZER_DESERIALIZER_INL_H_
#define SRC_BLOB_SERIALIZER_DESERIALIZER_INL_H_
#if defined(NODE_WANT_INTERNALS) && NODE_WANT_INTERNALS
#include "blob_serializer_deserializer.h"
#include <ostream>
#include <sstream>
#include <string>
#include <type_traits>
#include <utility>
#include "debug_utils-inl.h"
// This is related to the blob that is used in snapshots and single executable
// applications and has nothing to do with `node_blob.h`.
namespace node {
struct EnvSerializeInfo;
struct PropInfo;
struct RealmSerializeInfo;
namespace builtins {
struct CodeCacheInfo;
} // namespace builtins
// These operator<< overload declarations are needed because
// BlobSerializerDeserializer::ToStr() uses these.
std::ostream& operator<<(std::ostream& output,
const builtins::CodeCacheInfo& info);
std::ostream& operator<<(std::ostream& output,
const std::vector<builtins::CodeCacheInfo>& vec);
std::ostream& operator<<(std::ostream& output, const std::vector<uint8_t>& vec);
std::ostream& operator<<(std::ostream& output,
const std::vector<PropInfo>& vec);
std::ostream& operator<<(std::ostream& output, const PropInfo& info);
std::ostream& operator<<(std::ostream& output,
const std::vector<std::string>& vec);
std::ostream& operator<<(std::ostream& output, const RealmSerializeInfo& i);
std::ostream& operator<<(std::ostream& output, const EnvSerializeInfo& i);
template <typename... Args>
void BlobSerializerDeserializer::Debug(const char* format,
Args&&... args) const {
if (is_debug) {
FPrintF(stderr, format, std::forward<Args>(args)...);
}
}
template <typename T>
std::string BlobSerializerDeserializer::ToStr(const T& arg) const {
std::stringstream ss;
ss << arg;
return ss.str();
}
template <typename T>
std::string BlobSerializerDeserializer::GetName() const {
#define TYPE_LIST(V) \
V(builtins::CodeCacheInfo) \
V(PropInfo) \
V(std::string)
#define V(TypeName) \
if constexpr (std::is_same_v<T, TypeName>) { \
return #TypeName; \
} else // NOLINT(readability/braces)
TYPE_LIST(V)
#undef V
if constexpr (std::is_arithmetic_v<T>) {
return (std::is_unsigned_v<T> ? "uint"
: std::is_integral_v<T> ? "int"
: "float") +
std::to_string(sizeof(T) * 8) + "_t";
}
return "";
}
// Helper for reading numeric types.
template <typename Impl>
template <typename T>
T BlobDeserializer<Impl>::ReadArithmetic() {
static_assert(std::is_arithmetic_v<T>, "Not an arithmetic type");
T result;
ReadArithmetic(&result, 1);
return result;
}
// Layout of vectors:
// [ 4/8 bytes ] count
// [ ... ] contents (count * size of individual elements)
template <typename Impl>
template <typename T>
std::vector<T> BlobDeserializer<Impl>::ReadVector() {
if (is_debug) {
std::string name = GetName<T>();
Debug("\nReadVector<%s>()(%d-byte)\n", name, sizeof(T));
}
size_t count = static_cast<size_t>(ReadArithmetic<size_t>());
if (count == 0) {
return std::vector<T>();
}
if (is_debug) {
Debug("Reading %d vector elements...\n", count);
}
std::vector<T> result;
if constexpr (std::is_arithmetic_v<T>) {
result = ReadArithmeticVector<T>(count);
} else {
result = ReadNonArithmeticVector<T>(count);
}
if (is_debug) {
std::string str = std::is_arithmetic_v<T> ? "" : ToStr(result);
std::string name = GetName<T>();
Debug("ReadVector<%s>() read %s\n", name, str);
}
return result;
}
template <typename Impl>
std::string BlobDeserializer<Impl>::ReadString() {
std::string_view view = ReadStringView(StringLogMode::kAddressAndContent);
return std::string(view);
}
template <typename Impl>
std::string_view BlobDeserializer<Impl>::ReadStringView(StringLogMode mode) {
size_t length = ReadArithmetic<size_t>();
Debug("ReadStringView(), length=%zu: ", length);
if (length == 0) {
Debug("ReadStringView() read an empty view\n");
return std::string_view();
}
std::string_view result(sink.data() + read_total, length);
Debug("%p, read %zu bytes", result.data(), result.size());
if (mode == StringLogMode::kAddressAndContent) {
Debug(", content:%s%s", length > 32 ? "\n" : " ", result);
}
Debug("\n");
read_total += length;
return result;
}
// Helper for reading an array of numeric types.
template <typename Impl>
template <typename T>
void BlobDeserializer<Impl>::ReadArithmetic(T* out, size_t count) {
static_assert(std::is_arithmetic_v<T>, "Not an arithmetic type");
DCHECK_GT(count, 0); // Should not read contents for vectors of size 0.
if (is_debug) {
std::string name = GetName<T>();
Debug("Read<%s>()(%d-byte), count=%d: ", name, sizeof(T), count);
}
size_t size = sizeof(T) * count;
memcpy(out, sink.data() + read_total, size);
if (is_debug) {
std::string str =
"{ " + std::to_string(out[0]) + (count > 1 ? ", ... }" : " }");
Debug("%s, read %zu bytes\n", str, size);
}
read_total += size;
}
// Helper for reading numeric vectors.
template <typename Impl>
template <typename Number>
std::vector<Number> BlobDeserializer<Impl>::ReadArithmeticVector(size_t count) {
static_assert(std::is_arithmetic_v<Number>, "Not an arithmetic type");
DCHECK_GT(count, 0); // Should not read contents for vectors of size 0.
std::vector<Number> result(count);
ReadArithmetic(result.data(), count);
return result;
}
// Helper for reading non-numeric vectors.
template <typename Impl>
template <typename T>
std::vector<T> BlobDeserializer<Impl>::ReadNonArithmeticVector(size_t count) {
static_assert(!std::is_arithmetic_v<T>, "Arithmetic type");
DCHECK_GT(count, 0); // Should not read contents for vectors of size 0.
std::vector<T> result;
result.reserve(count);
bool original_is_debug = is_debug;
is_debug = original_is_debug && !std::is_same_v<T, std::string>;
for (size_t i = 0; i < count; ++i) {
if (is_debug) {
Debug("\n[%d] ", i);
}
result.push_back(ReadElement<T>());
}
is_debug = original_is_debug;
return result;
}
template <typename Impl>
template <typename T>
T BlobDeserializer<Impl>::ReadElement() {
if constexpr (std::is_arithmetic_v<T>) {
return ReadArithmetic<T>();
} else if constexpr (std::is_same_v<T, std::string>) {
return ReadString();
} else {
return impl()->template Read<T>();
}
}
// Helper for writing numeric types.
template <typename Impl>
template <typename T>
size_t BlobSerializer<Impl>::WriteArithmetic(const T& data) {
static_assert(std::is_arithmetic_v<T>, "Not an arithmetic type");
return WriteArithmetic(&data, 1);
}
// Layout of vectors:
// [ 4/8 bytes ] count
// [ ... ] contents (count * size of individual elements)
template <typename Impl>
template <typename T>
size_t BlobSerializer<Impl>::WriteVector(const std::vector<T>& data) {
if (is_debug) {
std::string str = std::is_arithmetic_v<T> ? "" : ToStr(data);
std::string name = GetName<T>();
Debug("\nAt 0x%x: WriteVector<%s>() (%d-byte), count=%d: %s\n",
sink.size(),
name,
sizeof(T),
data.size(),
str);
}
size_t written_total = WriteArithmetic<size_t>(data.size());
if (data.empty()) {
return written_total;
}
if constexpr (std::is_arithmetic_v<T>) {
written_total += WriteArithmeticVector<T>(data);
} else {
written_total += WriteNonArithmeticVector<T>(data);
}
if (is_debug) {
std::string name = GetName<T>();
Debug("WriteVector<%s>() wrote %d bytes\n", name, written_total);
}
return written_total;
}
// The layout of a written string:
// [ 4/8 bytes ] length
// [ |length| bytes ] contents
template <typename Impl>
size_t BlobSerializer<Impl>::WriteStringView(std::string_view data,
StringLogMode mode) {
Debug("At 0x%x: WriteStringView(), length=%zu: %p\n",
sink.size(),
data.size(),
data.data());
size_t written_total = WriteArithmetic<size_t>(data.size());
size_t length = data.size();
if (length == 0) {
Debug("WriteStringView() wrote an empty view\n");
return written_total;
}
sink.insert(sink.end(), data.data(), data.data() + length);
written_total += length;
Debug("WriteStringView() wrote %zu bytes\n", written_total);
if (mode == StringLogMode::kAddressAndContent) {
Debug("%s", data);
}
return written_total;
}
template <typename Impl>
size_t BlobSerializer<Impl>::WriteString(const std::string& data) {
return WriteStringView(data, StringLogMode::kAddressAndContent);
}
static size_t kPreviewCount = 16;
// Helper for writing an array of numeric types.
template <typename Impl>
template <typename T>
size_t BlobSerializer<Impl>::WriteArithmetic(const T* data, size_t count) {
static_assert(std::is_arithmetic_v<T>, "Arithmetic type");
DCHECK_GT(count, 0); // Should not write contents for vectors of size 0.
if (is_debug) {
size_t preview_count = count < kPreviewCount ? count : kPreviewCount;
std::string str = "{ ";
for (size_t i = 0; i < preview_count; ++i) {
str += (std::to_string(data[i]) + ",");
}
if (count > preview_count) {
str += "...";
}
str += "}";
std::string name = GetName<T>();
Debug("At 0x%x: Write<%s>() (%zu-byte), count=%zu: %s",
sink.size(),
name,
sizeof(T),
count,
str);
}
size_t size = sizeof(T) * count;
const char* pos = reinterpret_cast<const char*>(data);
sink.insert(sink.end(), pos, pos + size);
if (is_debug) {
Debug(", wrote %zu bytes\n", size);
}
return size;
}
// Helper for writing numeric vectors.
template <typename Impl>
template <typename Number>
size_t BlobSerializer<Impl>::WriteArithmeticVector(
const std::vector<Number>& data) {
static_assert(std::is_arithmetic_v<Number>, "Arithmetic type");
return WriteArithmetic(data.data(), data.size());
}
// Helper for writing non-numeric vectors.
template <typename Impl>
template <typename T>
size_t BlobSerializer<Impl>::WriteNonArithmeticVector(
const std::vector<T>& data) {
static_assert(!std::is_arithmetic_v<T>, "Arithmetic type");
DCHECK_GT(data.size(),
0); // Should not write contents for vectors of size 0.
size_t written_total = 0;
bool original_is_debug = is_debug;
is_debug = original_is_debug && !std::is_same_v<T, std::string>;
for (size_t i = 0; i < data.size(); ++i) {
if (is_debug) {
Debug("\n[%d] ", i);
}
written_total += WriteElement<T>(data[i]);
}
is_debug = original_is_debug;
return written_total;
}
template <typename Impl>
template <typename T>
size_t BlobSerializer<Impl>::WriteElement(const T& data) {
if constexpr (std::is_arithmetic_v<T>) {
return WriteArithmetic<T>(data);
} else if constexpr (std::is_same_v<T, std::string>) {
return WriteString(data);
} else {
return impl()->template Write<T>(data);
}
}
} // namespace node
#endif // defined(NODE_WANT_INTERNALS) && NODE_WANT_INTERNALS
#endif // SRC_BLOB_SERIALIZER_DESERIALIZER_INL_H_