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Posted to commits@tvm.apache.org by tq...@apache.org on 2025/08/02 12:22:36 UTC
(tvm) branch small-str-v0 updated (2b0690accf -> b0acf2bb5c)
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tqchen pushed a change to branch small-str-v0
in repository https://gitbox.apache.org/repos/asf/tvm.git
discard 2b0690accf [FFI] Introduce small string
new b0acf2bb5c [FFI] Introduce small string
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Summary of changes:
ffi/include/tvm/ffi/string.h | 27 ++++++++++++++++++++--
ffi/src/ffi/object.cc | 4 ++--
ffi/tests/cpp/test_string.cc | 6 ++---
src/contrib/msc/core/printer/cpp_printer.cc | 7 +++---
src/contrib/msc/core/printer/python_printer.cc | 2 +-
src/relax/backend/contrib/dnnl/codegen.cc | 2 +-
src/script/ir_builder/tir/ir.cc | 3 +--
.../printer/doc_printer/python_doc_printer.cc | 2 +-
src/support/utils.h | 2 +-
9 files changed, 39 insertions(+), 16 deletions(-)
(tvm) 01/01: [FFI] Introduce small string
Posted by tq...@apache.org.
This is an automated email from the ASF dual-hosted git repository.
tqchen pushed a commit to branch small-str-v0
in repository https://gitbox.apache.org/repos/asf/tvm.git
commit b0acf2bb5c34b600c4c89336a6bac4e713a6b97b
Author: tqchen <ti...@gmail.com>
AuthorDate: Thu Jul 31 10:01:27 2025 -0400
[FFI] Introduce small string
This PR introduces small string support to the FFI system.
When the string length fit into the space in TVMFFIAny (aka len(str) <= 10).
We directly store the string content into the TVMFFIAny content instead of creating a Object.
This change will likely speedup small string access.
Some implications:
- Always check for kTVMFFISmallStr code as well as kTVMFFIStr
- Avoid using details::StringObj, instead, always use any.as<String>()
- Always set any.padding to 0 for other values (in compiler and runtime) to enable fast cmp
---
ffi/include/tvm/ffi/any.h | 98 ++++--
ffi/include/tvm/ffi/base_details.h | 3 +-
ffi/include/tvm/ffi/c_api.h | 46 ++-
ffi/include/tvm/ffi/cast.h | 1 +
ffi/include/tvm/ffi/container/variant.h | 2 +
ffi/include/tvm/ffi/dtype.h | 9 +-
ffi/include/tvm/ffi/object.h | 1 +
ffi/include/tvm/ffi/optional.h | 119 ++++++-
ffi/include/tvm/ffi/reflection/accessor.h | 2 +-
ffi/include/tvm/ffi/rvalue_ref.h | 4 +-
ffi/include/tvm/ffi/string.h | 349 ++++++++++++++++-----
ffi/include/tvm/ffi/type_traits.h | 16 +-
ffi/src/ffi/dtype.cc | 4 +-
ffi/src/ffi/extra/structural_equal.cc | 22 +-
ffi/src/ffi/extra/structural_hash.cc | 14 +
ffi/src/ffi/object.cc | 12 +-
ffi/tests/cpp/test_any.cc | 11 +
ffi/tests/cpp/test_dtype.cc | 1 +
ffi/tests/cpp/test_optional.cc | 17 +
ffi/tests/cpp/test_reflection_accessor.cc | 1 -
ffi/tests/cpp/test_rvalue_ref.cc | 4 +-
ffi/tests/cpp/test_string.cc | 28 +-
ffi/tests/cpp/test_variant.cc | 4 +-
include/tvm/script/printer/ir_docsifier.h | 1 +
include/tvm/tir/builtin.h | 1 +
jvm/native/src/main/native/jni_helper_func.h | 8 +-
.../src/main/native/org_apache_tvm_native_c_api.cc | 2 +
python/tvm/ffi/cython/base.pxi | 6 +-
python/tvm/ffi/cython/dtype.pxi | 19 +-
python/tvm/ffi/cython/function.pxi | 10 +
src/contrib/msc/core/ir/graph_builder.h | 1 +
src/contrib/msc/core/printer/cpp_printer.cc | 7 +-
src/contrib/msc/core/printer/python_printer.cc | 2 +-
src/node/repr_printer.cc | 1 +
src/relax/backend/contrib/dnnl/codegen.cc | 2 +-
src/runtime/minrpc/rpc_reference.h | 3 +
src/runtime/rpc/rpc_module.cc | 10 +-
src/script/ir_builder/tir/ir.cc | 3 +-
.../printer/doc_printer/python_doc_printer.cc | 2 +-
src/support/utils.h | 11 +-
src/target/llvm/codegen_cpu.cc | 5 +
src/target/source/codegen_c.cc | 6 +
src/target/source/codegen_c_host.cc | 2 +
src/tir/transforms/lower_tvm_builtin.cc | 5 +
src/tir/transforms/make_packed_api.cc | 7 +-
web/src/ctypes.ts | 2 +
web/src/memory.ts | 20 +-
web/src/runtime.ts | 11 +-
web/tests/node/test_packed_func.js | 4 +-
49 files changed, 733 insertions(+), 186 deletions(-)
diff --git a/ffi/include/tvm/ffi/any.h b/ffi/include/tvm/ffi/any.h
index d94185c064..08b8eb52d3 100644
--- a/ffi/include/tvm/ffi/any.h
+++ b/ffi/include/tvm/ffi/any.h
@@ -60,6 +60,7 @@ class AnyView {
void reset() {
data_.type_index = TypeIndex::kTVMFFINone;
// invariance: always set the union padding part to 0
+ data_.zero_padding = 0;
data_.v_int64 = 0;
}
/*!
@@ -72,6 +73,7 @@ class AnyView {
// default constructors
AnyView() {
data_.type_index = TypeIndex::kTVMFFINone;
+ data_.zero_padding = 0;
data_.v_int64 = 0;
}
~AnyView() = default;
@@ -80,6 +82,7 @@ class AnyView {
AnyView& operator=(const AnyView&) = default;
AnyView(AnyView&& other) : data_(other.data_) {
other.data_.type_index = TypeIndex::kTVMFFINone;
+ other.data_.zero_padding = 0;
other.data_.v_int64 = 0;
}
TVM_FFI_INLINE AnyView& operator=(AnyView&& other) {
@@ -198,13 +201,11 @@ TVM_FFI_INLINE void InplaceConvertAnyViewToAny(TVMFFIAny* data,
if (data->type_index == TypeIndex::kTVMFFIRawStr) {
// convert raw string to owned string object
String temp(data->v_c_str);
- data->type_index = TypeIndex::kTVMFFIStr;
- data->v_obj = details::ObjectUnsafe::MoveObjectRefToTVMFFIObjectPtr(std::move(temp));
+ TypeTraits<String>::MoveToAny(std::move(temp), data);
} else if (data->type_index == TypeIndex::kTVMFFIByteArrayPtr) {
// convert byte array to owned bytes object
Bytes temp(*static_cast<TVMFFIByteArray*>(data->v_ptr));
- data->type_index = TypeIndex::kTVMFFIBytes;
- data->v_obj = details::ObjectUnsafe::MoveObjectRefToTVMFFIObjectPtr(std::move(temp));
+ TypeTraits<Bytes>::MoveToAny(std::move(temp), data);
} else if (data->type_index == TypeIndex::kTVMFFIObjectRValueRef) {
// convert rvalue ref to owned object
Object** obj_addr = static_cast<Object**>(data->v_ptr);
@@ -212,8 +213,7 @@ TVM_FFI_INLINE void InplaceConvertAnyViewToAny(TVMFFIAny* data,
ObjectRef temp(details::ObjectUnsafe::ObjectPtrFromOwned<Object>(obj_addr[0]));
// set the rvalue ref to nullptr to avoid double move
obj_addr[0] = nullptr;
- data->type_index = temp->type_index();
- data->v_obj = details::ObjectUnsafe::MoveObjectRefToTVMFFIObjectPtr(std::move(temp));
+ TypeTraits<ObjectRef>::MoveToAny(std::move(temp), data);
}
}
}
@@ -239,6 +239,7 @@ class Any {
details::ObjectUnsafe::DecRefObjectHandle(data_.v_obj);
}
data_.type_index = TVMFFITypeIndex::kTVMFFINone;
+ data_.zero_padding = 0;
data_.v_int64 = 0;
}
/*!
@@ -251,6 +252,7 @@ class Any {
// default constructors
Any() {
data_.type_index = TypeIndex::kTVMFFINone;
+ data_.zero_padding = 0;
data_.v_int64 = 0;
}
~Any() { this->reset(); }
@@ -262,6 +264,7 @@ class Any {
}
Any(Any&& other) : data_(other.data_) {
other.data_.type_index = TypeIndex::kTVMFFINone;
+ other.data_.zero_padding = 0;
other.data_.v_int64 = 0;
}
TVM_FFI_INLINE Any& operator=(const Any& other) {
@@ -408,7 +411,8 @@ class Any {
* \return True if the two Any are same type and value, false otherwise.
*/
TVM_FFI_INLINE bool same_as(const Any& other) const noexcept {
- return data_.type_index == other.data_.type_index && data_.v_int64 == other.data_.v_int64;
+ return data_.type_index == other.data_.type_index &&
+ data_.zero_padding == other.data_.zero_padding && data_.v_int64 == other.data_.v_int64;
}
/*
@@ -485,6 +489,7 @@ struct AnyUnsafe : public ObjectUnsafe {
TVM_FFI_INLINE static TVMFFIAny MoveAnyToTVMFFIAny(Any&& any) {
TVMFFIAny result = any.data_;
any.data_.type_index = TypeIndex::kTVMFFINone;
+ any.data_.zero_padding = 0;
any.data_.v_int64 = 0;
return result;
}
@@ -493,6 +498,7 @@ struct AnyUnsafe : public ObjectUnsafe {
Any any;
any.data_ = data;
data.type_index = TypeIndex::kTVMFFINone;
+ data.zero_padding = 0;
data.v_int64 = 0;
return any;
}
@@ -543,17 +549,21 @@ struct AnyHash {
* \return Hash code of a, string hash for strings and pointer address otherwise.
*/
uint64_t operator()(const Any& src) const {
- uint64_t val_hash = [&]() -> uint64_t {
- if (src.data_.type_index == TypeIndex::kTVMFFIStr ||
- src.data_.type_index == TypeIndex::kTVMFFIBytes) {
- const details::BytesObjBase* src_str =
- details::AnyUnsafe::CopyFromAnyViewAfterCheck<const details::BytesObjBase*>(src);
- return details::StableHashBytes(src_str->data, src_str->size);
- } else {
- return src.data_.v_uint64;
- }
- }();
- return details::StableHashCombine(src.data_.type_index, val_hash);
+ if (src.data_.type_index == TypeIndex::kTVMFFISmallStr) {
+ // for small string, we use the same type key hash as normal string
+ // so heap allocated string and on stack string will have the same hash
+ return details::StableHashCombine(
+ TypeIndex::kTVMFFIStr,
+ details::StableHashBytes(src.data_.small_str_header + 1, src.data_.small_str_header[0]));
+ } else if (src.data_.type_index == TypeIndex::kTVMFFIStr ||
+ src.data_.type_index == TypeIndex::kTVMFFIBytes) {
+ const details::BytesObjBase* src_str =
+ details::AnyUnsafe::CopyFromAnyViewAfterCheck<const details::BytesObjBase*>(src);
+ return details::StableHashCombine(src.data_.type_index,
+ details::StableHashBytes(src_str->data, src_str->size));
+ } else {
+ return details::StableHashCombine(src.data_.type_index, src.data_.v_uint64);
+ }
}
};
@@ -566,19 +576,47 @@ struct AnyEqual {
* \return String equality if both are strings, pointer address equality otherwise.
*/
bool operator()(const Any& lhs, const Any& rhs) const {
- if (lhs.data_.type_index != rhs.data_.type_index) return false;
- // byte equivalence
- if (lhs.data_.v_int64 == rhs.data_.v_int64) return true;
- // specialy handle string hash
- if (lhs.data_.type_index == TypeIndex::kTVMFFIStr ||
- lhs.data_.type_index == TypeIndex::kTVMFFIBytes) {
- const details::BytesObjBase* lhs_str =
- details::AnyUnsafe::CopyFromAnyViewAfterCheck<const details::BytesObjBase*>(lhs);
- const details::BytesObjBase* rhs_str =
- details::AnyUnsafe::CopyFromAnyViewAfterCheck<const details::BytesObjBase*>(rhs);
- return Bytes::memequal(lhs_str->data, rhs_str->data, lhs_str->size, rhs_str->size);
+ // header with type index
+ const int64_t* lhs_as_int64 = reinterpret_cast<const int64_t*>(&lhs.data_);
+ const int64_t* rhs_as_int64 = reinterpret_cast<const int64_t*>(&rhs.data_);
+ static_assert(sizeof(TVMFFIAny) == 16);
+ // fast path, check byte equality
+ if (lhs_as_int64[0] == rhs_as_int64[0] && lhs_as_int64[1] == rhs_as_int64[1]) {
+ return true;
+ }
+ // common false case type index match, in this case we only need to pay attention to string
+ // equality
+ if (lhs.data_.type_index == rhs.data_.type_index) {
+ // specialy handle string hash
+ if (lhs.data_.type_index == TypeIndex::kTVMFFIStr ||
+ lhs.data_.type_index == TypeIndex::kTVMFFIBytes) {
+ const details::BytesObjBase* lhs_str =
+ details::AnyUnsafe::CopyFromAnyViewAfterCheck<const details::BytesObjBase*>(lhs);
+ const details::BytesObjBase* rhs_str =
+ details::AnyUnsafe::CopyFromAnyViewAfterCheck<const details::BytesObjBase*>(rhs);
+ return Bytes::memequal(lhs_str->data, rhs_str->data, lhs_str->size, rhs_str->size);
+ }
+ return false;
+ } else {
+ // type_index mismatch, if index is not string, return false
+ if (lhs.data_.type_index != kTVMFFIStr && lhs.data_.type_index != kTVMFFISmallStr) {
+ return false;
+ }
+ // small string and normal string comparison
+ if (lhs.data_.type_index == kTVMFFIStr && rhs.data_.type_index == kTVMFFISmallStr) {
+ const details::BytesObjBase* lhs_str =
+ details::AnyUnsafe::CopyFromAnyViewAfterCheck<const details::BytesObjBase*>(lhs);
+ return Bytes::memequal(lhs_str->data, rhs.data_.small_str_header + 1, lhs_str->size,
+ rhs.data_.small_str_header[0]);
+ }
+ if (lhs.data_.type_index == kTVMFFISmallStr && rhs.data_.type_index == kTVMFFIStr) {
+ const details::BytesObjBase* rhs_str =
+ details::AnyUnsafe::CopyFromAnyViewAfterCheck<const details::BytesObjBase*>(rhs);
+ return Bytes::memequal(lhs.data_.small_str_header + 1, rhs_str->data,
+ lhs.data_.small_str_header[0], rhs_str->size);
+ }
+ return false;
}
- return false;
}
};
diff --git a/ffi/include/tvm/ffi/base_details.h b/ffi/include/tvm/ffi/base_details.h
index cfdadff6ea..1c977d12dc 100644
--- a/ffi/include/tvm/ffi/base_details.h
+++ b/ffi/include/tvm/ffi/base_details.h
@@ -170,7 +170,8 @@ TVM_FFI_INLINE uint64_t StableHashCombine(uint64_t key, const T& value) {
* \param size The size of the bytes.
* \return the hash value.
*/
-TVM_FFI_INLINE uint64_t StableHashBytes(const char* data, size_t size) {
+TVM_FFI_INLINE uint64_t StableHashBytes(const void* data_ptr, size_t size) {
+ const char* data = reinterpret_cast<const char*>(data_ptr);
const constexpr uint64_t kMultiplier = 1099511628211ULL;
const constexpr uint64_t kMod = 2147483647ULL;
union Union {
diff --git a/ffi/include/tvm/ffi/c_api.h b/ffi/include/tvm/ffi/c_api.h
index d99832af01..b44250d00c 100644
--- a/ffi/include/tvm/ffi/c_api.h
+++ b/ffi/include/tvm/ffi/c_api.h
@@ -65,13 +65,7 @@ enum TVMFFITypeIndex : int32_t {
#else
typedef enum {
#endif
- // [Section] On-stack POD and special types: [0, kTVMFFIStaticObjectBegin)
- // N.B. `kTVMFFIRawStr` is a string backed by a `\0`-terminated char array,
- // which is not owned by TVMFFIAny. It is required that the following
- // invariant holds:
- // - `Any::type_index` is never `kTVMFFIRawStr`
- // - `AnyView::type_index` can be `kTVMFFIRawStr`
- //
+
/*
* \brief The root type of all FFI objects.
*
@@ -80,6 +74,13 @@ typedef enum {
* However, it may appear in field annotations during reflection.
*/
kTVMFFIAny = -1,
+ // [Section] On-stack POD and special types: [0, kTVMFFIStaticObjectBegin)
+ // N.B. `kTVMFFIRawStr` is a string backed by a `\0`-terminated char array,
+ // which is not owned by TVMFFIAny. It is required that the following
+ // invariant holds:
+ // - `Any::type_index` is never `kTVMFFIRawStr`
+ // - `AnyView::type_index` can be `kTVMFFIRawStr`
+ //
/*! \brief None/nullptr value */
kTVMFFINone = 0,
/*! \brief POD int value */
@@ -96,12 +97,14 @@ typedef enum {
kTVMFFIDevice = 6,
/*! \brief DLTensor* */
kTVMFFIDLTensorPtr = 7,
- /*! \brief const char**/
+ /*! \brief const char* */
kTVMFFIRawStr = 8,
/*! \brief TVMFFIByteArray* */
kTVMFFIByteArrayPtr = 9,
/*! \brief R-value reference to ObjectRef */
kTVMFFIObjectRValueRef = 10,
+ /*! \brief Small string on stack */
+ kTVMFFISmallStr = 11,
/*! \brief Start of statically defined objects. */
kTVMFFIStaticObjectBegin = 64,
/*!
@@ -183,11 +186,16 @@ typedef struct TVMFFIAny {
* \note The type index of Object and Any are shared in FFI.
*/
int32_t type_index;
- /*!
- * \brief length for on-stack Any object, such as small-string
- * \note This field is reserved for future compact.
- */
- int32_t small_len;
+ union { // 4 bytes
+ /*! \brief padding, must set to zero for values other than small string. */
+ uint32_t zero_padding;
+ /*!
+ * \brief small string header, small_str_header[0] is the length of the string,
+ * followed by the content of the string.
+ * \note This field is used to store small string on stack.
+ */
+ uint8_t small_str_header[4];
+ };
union { // 8 bytes
int64_t v_int64; // integers
double v_float64; // floating-point numbers
@@ -823,7 +831,7 @@ TVM_FFI_DLL int TVMFFIDataTypeFromString(const TVMFFIByteArray* str, DLDataType*
* \note The input dtype is a pointer to the DLDataType to avoid ABI compatibility issues.
*/
-TVM_FFI_DLL int TVMFFIDataTypeToString(const DLDataType* dtype, TVMFFIObjectHandle* out);
+TVM_FFI_DLL int TVMFFIDataTypeToString(const DLDataType* dtype, TVMFFIAny* out);
//------------------------------------------------------------
// Section: Backend noexcept functions for internal use
@@ -903,6 +911,16 @@ inline int32_t TVMFFIObjectGetTypeIndex(TVMFFIObjectHandle obj) {
return static_cast<TVMFFIObject*>(obj)->type_index;
}
+/*!
+ * \brief Get the content of a small string in bytearray format.
+ * \param obj The object handle.
+ * \return The content of the small string in bytearray format.
+ */
+inline TVMFFIByteArray TVMFFISmallStrGetContentByteArray(const TVMFFIAny* value) {
+ return TVMFFIByteArray{reinterpret_cast<const char*>(value->small_str_header + 1),
+ static_cast<size_t>(value->small_str_header[0])};
+}
+
/*!
* \brief Get the data pointer of a bytearray from a string or bytes object.
* \param obj The object handle.
diff --git a/ffi/include/tvm/ffi/cast.h b/ffi/include/tvm/ffi/cast.h
index 9cac1f99a8..997c0bb178 100644
--- a/ffi/include/tvm/ffi/cast.h
+++ b/ffi/include/tvm/ffi/cast.h
@@ -27,6 +27,7 @@
#include <tvm/ffi/dtype.h>
#include <tvm/ffi/error.h>
#include <tvm/ffi/object.h>
+#include <tvm/ffi/optional.h>
#include <utility>
diff --git a/ffi/include/tvm/ffi/container/variant.h b/ffi/include/tvm/ffi/container/variant.h
index a16ff5d425..ee1f8316d8 100644
--- a/ffi/include/tvm/ffi/container/variant.h
+++ b/ffi/include/tvm/ffi/container/variant.h
@@ -80,10 +80,12 @@ class VariantBase<true> : public ObjectRef {
TVMFFIAny any_data;
if (data_ == nullptr) {
any_data.type_index = TypeIndex::kTVMFFINone;
+ any_data.zero_padding = 0;
any_data.v_int64 = 0;
} else {
TVM_FFI_CLEAR_PTR_PADDING_IN_FFI_ANY(&any_data);
any_data.type_index = data_->type_index();
+ any_data.zero_padding = 0;
any_data.v_obj = details::ObjectUnsafe::TVMFFIObjectPtrFromObjectPtr<Object>(data_);
}
return AnyView::CopyFromTVMFFIAny(any_data);
diff --git a/ffi/include/tvm/ffi/dtype.h b/ffi/include/tvm/ffi/dtype.h
index 2eafccd2db..c153d71cb7 100644
--- a/ffi/include/tvm/ffi/dtype.h
+++ b/ffi/include/tvm/ffi/dtype.h
@@ -115,14 +115,15 @@ inline const char* DLDataTypeCodeAsCStr(DLDataTypeCode type_code) { // NOLINT(*
inline DLDataType StringToDLDataType(const String& str) {
DLDataType out;
- TVM_FFI_CHECK_SAFE_CALL(TVMFFIDataTypeFromString(str.get(), &out));
+ TVMFFIByteArray data{str.data(), str.size()};
+ TVM_FFI_CHECK_SAFE_CALL(TVMFFIDataTypeFromString(&data, &out));
return out;
}
inline String DLDataTypeToString(DLDataType dtype) {
- TVMFFIObjectHandle out;
+ TVMFFIAny out;
TVM_FFI_CHECK_SAFE_CALL(TVMFFIDataTypeToString(&dtype, &out));
- return String(details::ObjectUnsafe::ObjectPtrFromOwned<Object>(static_cast<TVMFFIObject*>(out)));
+ return TypeTraits<String>::MoveFromAnyAfterCheck(&out);
}
// DLDataType
@@ -134,6 +135,7 @@ struct TypeTraits<DLDataType> : public TypeTraitsBase {
// clear padding part to ensure the equality check can always check the v_uint64 part
result->v_uint64 = 0;
result->type_index = TypeIndex::kTVMFFIDataType;
+ result->zero_padding = 0;
result->v_dtype = src;
}
@@ -141,6 +143,7 @@ struct TypeTraits<DLDataType> : public TypeTraitsBase {
// clear padding part to ensure the equality check can always check the v_uint64 part
result->v_uint64 = 0;
result->type_index = TypeIndex::kTVMFFIDataType;
+ result->zero_padding = 0;
result->v_dtype = src;
}
diff --git a/ffi/include/tvm/ffi/object.h b/ffi/include/tvm/ffi/object.h
index a49a9f1700..74977e0216 100644
--- a/ffi/include/tvm/ffi/object.h
+++ b/ffi/include/tvm/ffi/object.h
@@ -60,6 +60,7 @@ struct StaticTypeKey {
static constexpr const char* kTVMFFIFunction = "ffi.Function";
static constexpr const char* kTVMFFIArray = "ffi.Array";
static constexpr const char* kTVMFFIMap = "ffi.Map";
+ static constexpr const char* kTVMFFISmallStr = "ffi.SmallStr";
};
/*!
diff --git a/ffi/include/tvm/ffi/optional.h b/ffi/include/tvm/ffi/optional.h
index 003038b9fd..dfb54f5e37 100644
--- a/ffi/include/tvm/ffi/optional.h
+++ b/ffi/include/tvm/ffi/optional.h
@@ -27,6 +27,7 @@
#include <tvm/ffi/error.h>
#include <tvm/ffi/object.h>
+#include <tvm/ffi/string.h>
#include <optional>
#include <string>
@@ -53,7 +54,7 @@ inline constexpr bool use_ptr_based_optional_v =
// Specialization for non-ObjectRef types.
// simply fallback to std::optional
template <typename T>
-class Optional<T, std::enable_if_t<!use_ptr_based_optional_v<T>>> {
+class Optional<T, std::enable_if_t<!use_ptr_based_optional_v<T> && !std::is_same_v<T, String>>> {
public:
// default constructors.
Optional() = default;
@@ -138,6 +139,122 @@ class Optional<T, std::enable_if_t<!use_ptr_based_optional_v<T>>> {
std::optional<T> data_;
};
+// Specialization for String type, use nullptr to indicate nullopt
+template <>
+class Optional<String, void> {
+ public:
+ // default constructors.
+ Optional() = default;
+ Optional(const Optional<String>& other) : data_(other.data_) {}
+ Optional(Optional<String>&& other) : data_(std::move(other.data_)) {}
+ Optional(std::nullopt_t) {} // NOLINT(*)
+ // normal value handling.
+ Optional(String other) // NOLINT(*)
+ : data_(std::move(other)) {}
+
+ TVM_FFI_INLINE Optional<String>& operator=(const Optional<String>& other) {
+ data_ = other.data_;
+ return *this;
+ }
+
+ TVM_FFI_INLINE Optional<String>& operator=(Optional<String>&& other) {
+ data_ = std::move(other.data_);
+ return *this;
+ }
+
+ TVM_FFI_INLINE Optional<String>& operator=(String other) {
+ data_ = std::move(other);
+ return *this;
+ }
+
+ TVM_FFI_INLINE Optional<String>& operator=(std::nullopt_t) {
+ String(std::nullopt).swap(data_);
+ return *this;
+ }
+
+ TVM_FFI_INLINE const String& value() const& {
+ if (data_.data_.type_index == TypeIndex::kTVMFFINone) {
+ TVM_FFI_THROW(RuntimeError) << "Back optional access";
+ }
+ return data_;
+ }
+
+ TVM_FFI_INLINE String&& value() && {
+ if (data_.data_.type_index == TypeIndex::kTVMFFINone) {
+ TVM_FFI_THROW(RuntimeError) << "Back optional access";
+ }
+ return std::move(data_);
+ }
+
+ template <typename U = String>
+ TVM_FFI_INLINE String value_or(U&& default_value) const {
+ if (data_.data_.type_index == TypeIndex::kTVMFFINone) {
+ return std::forward<U>(default_value);
+ }
+ return data_;
+ }
+
+ TVM_FFI_INLINE explicit operator bool() const noexcept {
+ return data_.data_.type_index != TypeIndex::kTVMFFINone;
+ }
+
+ TVM_FFI_INLINE bool has_value() const noexcept {
+ return data_.data_.type_index != TypeIndex::kTVMFFINone;
+ }
+
+ TVM_FFI_INLINE bool operator==(const Optional<String>& other) const {
+ if (data_.data_.type_index == TypeIndex::kTVMFFINone) {
+ return other.data_.data_.type_index == TypeIndex::kTVMFFINone;
+ }
+ if (other.data_.data_.type_index == TypeIndex::kTVMFFINone) {
+ return false;
+ }
+ return data_ == other.data_;
+ }
+
+ TVM_FFI_INLINE bool operator!=(const Optional<String>& other) const { return !(*this == other); }
+
+ template <typename U>
+ TVM_FFI_INLINE bool operator==(const U& other) const {
+ if constexpr (std::is_same_v<U, std::nullopt_t>) {
+ return data_.data_.type_index == TypeIndex::kTVMFFINone;
+ } else {
+ if (data_.data_.type_index == TypeIndex::kTVMFFINone) {
+ return false;
+ }
+ return data_ == other;
+ }
+ }
+ template <typename U>
+ TVM_FFI_INLINE bool operator!=(const U& other) const {
+ if constexpr (std::is_same_v<U, std::nullopt_t>) {
+ return data_.data_.type_index != TypeIndex::kTVMFFINone;
+ } else {
+ if (data_.data_.type_index == TypeIndex::kTVMFFINone) {
+ return true;
+ }
+ return data_ != other;
+ }
+ }
+
+ /*!
+ * \brief Direct access to the value.
+ * \return the xvalue reference to the stored value.
+ * \note only use this function after checking has_value()
+ */
+ TVM_FFI_INLINE String&& operator*() && noexcept { return std::move(data_); }
+ /*!
+ * \brief Direct access to the value.
+ * \return the const reference to the stored value.
+ * \note only use this function after checking has_value()
+ */
+ TVM_FFI_INLINE const String& operator*() const& noexcept { return data_; }
+
+ private:
+ // this is a private initializer
+ String data_{std::nullopt};
+};
+
// Specialization for ObjectRef types.
// nullptr is treated as std::nullopt.
template <typename T>
diff --git a/ffi/include/tvm/ffi/reflection/accessor.h b/ffi/include/tvm/ffi/reflection/accessor.h
index 40adfa3499..5215444052 100644
--- a/ffi/include/tvm/ffi/reflection/accessor.h
+++ b/ffi/include/tvm/ffi/reflection/accessor.h
@@ -48,7 +48,7 @@ inline const TVMFFIFieldInfo* GetFieldInfo(std::string_view type_key, const char
return &(info->fields[i]);
}
}
- TVM_FFI_THROW(RuntimeError) << "Cannot find field " << field_name << " in " << type_key;
+ TVM_FFI_THROW(RuntimeError) << "Cannot find field `" << field_name << "` in " << type_key;
TVM_FFI_UNREACHABLE();
}
diff --git a/ffi/include/tvm/ffi/rvalue_ref.h b/ffi/include/tvm/ffi/rvalue_ref.h
index b185e8d941..7c89038cc2 100644
--- a/ffi/include/tvm/ffi/rvalue_ref.h
+++ b/ffi/include/tvm/ffi/rvalue_ref.h
@@ -94,6 +94,7 @@ struct TypeTraits<RValueRef<TObjRef>> : public TypeTraitsBase {
TVM_FFI_INLINE static void CopyToAnyView(const RValueRef<TObjRef>& src, TVMFFIAny* result) {
result->type_index = TypeIndex::kTVMFFIObjectRValueRef;
+ result->zero_padding = 0;
// store the address of the ObjectPtr, which allows us to move the value
// and set the original ObjectPtr to nullptr
result->v_ptr = &(src.data_);
@@ -106,7 +107,7 @@ struct TypeTraits<RValueRef<TObjRef>> : public TypeTraitsBase {
// in this case we do not move the original rvalue ref since conversion creates a copy
TVMFFIAny tmp_any;
tmp_any.type_index = rvalue_ref->get()->type_index();
-
+ tmp_any.zero_padding = 0;
tmp_any.v_obj = reinterpret_cast<TVMFFIObject*>(rvalue_ref->get());
return "RValueRef<" + TypeTraits<TObjRef>::GetMismatchTypeInfo(&tmp_any) + ">";
} else {
@@ -120,6 +121,7 @@ struct TypeTraits<RValueRef<TObjRef>> : public TypeTraitsBase {
ObjectPtr<Object>* rvalue_ref = reinterpret_cast<ObjectPtr<Object>*>(src->v_ptr);
TVMFFIAny tmp_any;
tmp_any.type_index = rvalue_ref->get()->type_index();
+ tmp_any.zero_padding = 0;
tmp_any.v_obj = reinterpret_cast<TVMFFIObject*>(rvalue_ref->get());
// fast path, storage type matches, direct move the rvalue ref
if (TypeTraits<TObjRef>::CheckAnyStrict(&tmp_any)) {
diff --git a/ffi/include/tvm/ffi/string.h b/ffi/include/tvm/ffi/string.h
index 481b704436..ad366dcd4e 100644
--- a/ffi/include/tvm/ffi/string.h
+++ b/ffi/include/tvm/ffi/string.h
@@ -47,7 +47,9 @@
namespace tvm {
namespace ffi {
namespace details {
-/*! \brief Base class for bytes and string. */
+/*!
+ * \brief Base class for bytes and string objects.
+ */
class BytesObjBase : public Object, public TVMFFIByteArray {};
/*!
@@ -108,21 +110,21 @@ TVM_FFI_INLINE ObjectPtr<Base> MakeInplaceBytes(const char* data, size_t length)
class Bytes : public ObjectRef {
public:
/*!
- * \brief constructor from char [N]
+ * \brief constructor from size
*
* \param other a char array.
*/
Bytes(const char* data, size_t size) // NOLINT(*)
: ObjectRef(details::MakeInplaceBytes<details::BytesObj>(data, size)) {}
/*!
- * \brief constructor from char [N]
+ * \brief constructor from TVMFFIByteArray
*
* \param other a char array.
*/
Bytes(TVMFFIByteArray bytes) // NOLINT(*)
: ObjectRef(details::MakeInplaceBytes<details::BytesObj>(bytes.data, bytes.size)) {}
/*!
- * \brief constructor from char [N]
+ * \brief constructor from std::string
*
* \param other a char array.
*/
@@ -198,7 +200,7 @@ class Bytes : public ObjectRef {
*
* \return true if the two char sequences are equal, false otherwise.
*/
- static bool memequal(const char* lhs, const char* rhs, size_t lhs_count, size_t rhs_count) {
+ static bool memequal(const void* lhs, const void* rhs, size_t lhs_count, size_t rhs_count) {
return lhs_count == rhs_count && (lhs == rhs || std::memcmp(lhs, rhs, lhs_count) == 0);
}
@@ -232,75 +234,154 @@ class Bytes : public ObjectRef {
*
* \endcode
*/
-class String : public ObjectRef {
+class String {
public:
+ /*!
+ * \brief avoid misuse of nullptr
+ */
String(std::nullptr_t) = delete; // NOLINT(*)
+ /*!
+ * \brief constructor
+ */
+ String() {
+ data_.type_index = TypeIndex::kTVMFFISmallStr;
+ data_.zero_padding = 0;
+ data_.v_int64 = 0;
+ }
+ // constructors from Any
+ String(const String& other) : data_(other.data_) {
+ if (data_.type_index == TypeIndex::kTVMFFIStr) {
+ details::ObjectUnsafe::IncRefObjectHandle(data_.v_obj);
+ }
+ }
+
+ String(String&& other) : data_(other.data_) {
+ other.data_.type_index = TypeIndex::kTVMFFISmallStr;
+ other.data_.zero_padding = 0;
+ other.data_.v_int64 = 0;
+ }
/*!
- * \brief constructor from char [N]
- *
- * \param other a char array.
+ * \brief Destructor
*/
- template <size_t N>
- String(const char other[N]) // NOLINT(*)
- : ObjectRef(details::MakeInplaceBytes<details::StringObj>(other, N)) {}
+ ~String() {
+ if (data_.type_index == TypeIndex::kTVMFFIStr) {
+ details::ObjectUnsafe::DecRefObjectHandle(data_.v_obj);
+ }
+ }
/*!
- * \brief constructor
+ * \brief Swap this String with another string
+ * \param other The other string
*/
- String() : String("") {}
+ TVM_FFI_INLINE void swap(String& other) noexcept { // NOLINT(*)
+ std::swap(data_, other.data_);
+ }
+
+ TVM_FFI_INLINE String& operator=(const String& other) {
+ // copy-and-swap idiom
+ String(other).swap(*this); // NOLINT(*)
+ return *this;
+ }
+
+ TVM_FFI_INLINE String& operator=(String&& other) {
+ // copy-and-swap idiom
+ String(std::move(other)).swap(*this); // NOLINT(*)
+ return *this;
+ }
+
+ TVM_FFI_INLINE String& operator=(const std::string& other) {
+ String(other).swap(*this); // NOLINT(*)
+ return *this;
+ }
+ TVM_FFI_INLINE String& operator=(std::string&& other) {
+ String(std::move(other)).swap(*this); // NOLINT(*)
+ return *this;
+ }
+
+ TVM_FFI_INLINE String& operator=(const char* other) {
+ String(other).swap(*this); // NOLINT(*)
+ return *this;
+ }
/*!
* \brief constructor from raw string
*
* \param other a char array.
*/
- String(const char* other) // NOLINT(*)
- : ObjectRef(details::MakeInplaceBytes<details::StringObj>(other, std::strlen(other))) {}
+ String(const char* other, size_t size) { this->InitData(other, size); }
/*!
* \brief constructor from raw string
*
* \param other a char array.
+ * \note This constructor is marked as explicit to avoid implicit conversion
+ * of nullptr value here to string, which then was used in comparison
*/
- String(const char* other, size_t size) // NOLINT(*)
- : ObjectRef(details::MakeInplaceBytes<details::StringObj>(other, size)) {}
-
+ String(const char* other) { // NOLINT(*)
+ this->InitData(other, std::char_traits<char>::length(other));
+ }
/*!
* \brief Construct a new string object
* \param other The std::string object to be copied
*/
- String(const std::string& other) // NOLINT(*)
- : ObjectRef(details::MakeInplaceBytes<details::StringObj>(other.data(), other.size())) {}
+ String(const std::string& other) { // NOLINT(*)
+ this->InitData(other.data(), other.size());
+ }
/*!
* \brief Construct a new string object
* \param other The std::string object to be moved
*/
- String(std::string&& other) // NOLINT(*)
- : ObjectRef(make_object<details::BytesObjStdImpl<details::StringObj>>(std::move(other))) {}
+ String(std::string&& other) { // NOLINT(*)
+ // exception safety, first set to none so if exception is thrown
+ // destructor works correctly
+ data_.type_index = TypeIndex::kTVMFFINone;
+ data_.zero_padding = 0;
+ TVM_FFI_CLEAR_PTR_PADDING_IN_FFI_ANY(&data_);
+ data_.v_obj = details::ObjectUnsafe::MoveObjectPtrToTVMFFIObjectPtr(
+ make_object<details::BytesObjStdImpl<details::StringObj>>(std::move(other)));
+ data_.type_index = TypeIndex::kTVMFFIStr;
+ }
/*!
* \brief constructor from TVMFFIByteArray
*
* \param other a TVMFFIByteArray.
*/
- explicit String(TVMFFIByteArray other)
- : ObjectRef(details::MakeInplaceBytes<details::StringObj>(other.data, other.size)) {}
+ explicit String(TVMFFIByteArray other) { this->InitData(other.data, other.size); }
/*!
- * \brief Swap this String with another string
- * \param other The other string
+ * \brief Return the data pointer
+ *
+ * \return const char* data pointer
*/
- void swap(String& other) { // NOLINT(*)
- std::swap(data_, other.data_);
+ const char* data() const noexcept {
+ if (data_.type_index != TypeIndex::kTVMFFIStr) {
+ return reinterpret_cast<const char*>(data_.small_str_header + 1);
+ } else {
+ return TVMFFIBytesGetByteArrayPtr(data_.v_obj)->data;
+ }
}
- template <typename T>
- String& operator=(T&& other) {
- // copy-and-swap idiom
- String(std::forward<T>(other)).swap(*this); // NOLINT(*)
- return *this;
+ /*!
+ * \brief Returns a pointer to the char array in the string.
+ *
+ * \return const char*
+ */
+ const char* c_str() const noexcept { return data(); }
+
+ /*!
+ * \brief Return the length of the string
+ *
+ * \return size_t string length
+ */
+ size_t size() const noexcept {
+ if (data_.type_index != TypeIndex::kTVMFFIStr) {
+ return data_.small_str_header[0];
+ } else {
+ return TVMFFIBytesGetByteArrayPtr(data_.v_obj)->size;
+ }
}
/*!
@@ -362,23 +443,6 @@ class String : public ObjectRef {
return Bytes::memncmp(data(), other.data, size(), other.size);
}
- /*!
- * \brief Returns a pointer to the char array in the string.
- *
- * \return const char*
- */
- const char* c_str() const { return get()->data; }
-
- /*!
- * \brief Return the length of the string
- *
- * \return size_t string length
- */
- size_t size() const {
- const auto* ptr = get();
- return ptr->size;
- }
-
/*!
* \brief Return the length of the string
*
@@ -407,23 +471,66 @@ class String : public ObjectRef {
}
}
- /*!
- * \brief Return the data pointer
- *
- * \return const char* data pointer
- */
- const char* data() const { return get()->data; }
-
/*!
* \brief Convert String to an std::string object
*
* \return std::string
*/
- operator std::string() const { return std::string{get()->data, size()}; }
-
- TVM_FFI_DEFINE_NOTNULLABLE_OBJECT_REF_METHODS(String, ObjectRef, details::StringObj);
+ operator std::string() const { return std::string{data(), size()}; }
private:
+ friend struct TypeTraits<String>;
+ template <typename, typename>
+ friend class Optional;
+ /*!
+ * \brief backing data of the string container
+ * \note Need to explicitly operate on raw TVMFFIAny to avoid dependency on AnyView/Any
+ */
+ TVMFFIAny data_;
+ // create a new String from TVMFFIAny, must keep private
+ explicit String(TVMFFIAny data) : data_(std::move(data)) {}
+ // special constructor only for Optional<String>
+ // we should not use this constructor directly and it is kept as private
+ explicit String(std::nullopt_t) {
+ data_.type_index = TypeIndex::kTVMFFINone;
+ data_.zero_padding = 0;
+ data_.v_int64 = 0;
+ }
+ /*!
+ * \brief Create a new empty space for a string
+ * \param size The size of the string
+ * \return A pointer to the empty space
+ */
+ char* InitSpaceForSize(size_t size) {
+ // need to reserve one byte for \0, plus two bytes from header
+ constexpr size_t kMaxSmallStrLen = sizeof(int64_t) + 2;
+ // first zero the content, this is important for exception safety
+ data_.type_index = TypeIndex::kTVMFFISmallStr;
+ data_.zero_padding = 0;
+ data_.v_int64 = 0;
+ if (size <= kMaxSmallStrLen) {
+ // set up the size accordingly
+ data_.small_str_header[0] = static_cast<uint8_t>(size);
+ return reinterpret_cast<char*>(data_.small_str_header + 1);
+ } else {
+ // allocate from heap
+ ObjectPtr<details::StringObj> ptr =
+ make_inplace_array_object<details::StringObj, char>(size + 1);
+ char* dest_data = reinterpret_cast<char*>(ptr.get()) + sizeof(details::StringObj);
+ ptr->data = dest_data;
+ ptr->size = size;
+ data_.v_obj = details::ObjectUnsafe::MoveObjectPtrToTVMFFIObjectPtr(std::move(ptr));
+ // now reset the type index to str
+ data_.type_index = TypeIndex::kTVMFFIStr;
+ return dest_data;
+ }
+ }
+ // create a new TVMFFIAny from the data and size
+ void InitData(const char* data, size_t size) {
+ char* dest_data = InitSpaceForSize(size);
+ std::memcpy(dest_data, data, size);
+ dest_data[size] = '\0';
+ }
/*!
* \brief Concatenate two char sequences
*
@@ -435,9 +542,24 @@ class String : public ObjectRef {
* \return The concatenated char sequence
*/
static String Concat(const char* lhs, size_t lhs_size, const char* rhs, size_t rhs_size) {
- std::string ret(lhs, lhs_size);
- ret.append(rhs, rhs_size);
- return String(ret);
+ String ret;
+ // disable stringop-overflow and restrict warnings
+ // gcc may produce false positive when we enable dest_data returned from small string path
+ // Because compiler is not able to detect the condition that the path is only triggered via
+ // size < kMaxSmallStrLen and can report it as a overflow case.
+#if (__GNUC__) && !(__clang__)
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wstringop-overflow"
+#pragma GCC diagnostic ignored "-Wrestrict"
+#endif
+ char* dest_data = ret.InitSpaceForSize(lhs_size + rhs_size);
+ std::memcpy(dest_data, lhs, lhs_size);
+ std::memcpy(dest_data + lhs_size, rhs, rhs_size);
+ dest_data[lhs_size + rhs_size] = '\0';
+#if (__GNUC__) && !(__clang__)
+#pragma GCC diagnostic pop
+#endif
+ return ret;
}
// Overload + operator
@@ -453,6 +575,65 @@ TVM_FFI_INLINE std::string_view ToStringView(TVMFFIByteArray str) {
return std::string_view(str.data, str.size);
}
+template <>
+inline constexpr bool use_default_type_traits_v<String> = false;
+
+// specialize to enable implicit conversion from const char*
+template <>
+struct TypeTraits<String> : public TypeTraitsBase {
+ // string can be union type of small string and object, so keep it as any
+ static constexpr int32_t field_static_type_index = TypeIndex::kTVMFFIAny;
+
+ TVM_FFI_INLINE static void CopyToAnyView(const String& src, TVMFFIAny* result) {
+ *result = src.data_;
+ }
+
+ TVM_FFI_INLINE static void MoveToAny(String src, TVMFFIAny* result) {
+ *result = src.data_;
+ src.data_.type_index = TypeIndex::kTVMFFINone;
+ }
+
+ TVM_FFI_INLINE static bool CheckAnyStrict(const TVMFFIAny* src) {
+ return src->type_index == TypeIndex::kTVMFFISmallStr ||
+ src->type_index == TypeIndex::kTVMFFIStr;
+ }
+
+ TVM_FFI_INLINE static String CopyFromAnyViewAfterCheck(const TVMFFIAny* src) {
+ if (src->type_index == TypeIndex::kTVMFFIStr) {
+ TVMFFIAny temp = *src;
+ details::ObjectUnsafe::IncRefObjectHandle(temp.v_obj);
+ return String(temp);
+ } else {
+ return String(*src);
+ }
+ }
+
+ TVM_FFI_INLINE static String MoveFromAnyAfterCheck(TVMFFIAny* src) {
+ TVMFFIAny temp = *src;
+ src->type_index = TypeIndex::kTVMFFINone;
+ src->zero_padding = 0;
+ src->v_int64 = 0;
+ return String(temp);
+ }
+
+ TVM_FFI_INLINE static std::optional<String> TryCastFromAnyView(const TVMFFIAny* src) {
+ if (src->type_index == TypeIndex::kTVMFFIRawStr) {
+ return String(src->v_c_str);
+ }
+ if (src->type_index == TypeIndex::kTVMFFISmallStr) {
+ return String(*src);
+ }
+ if (src->type_index == TypeIndex::kTVMFFIStr) {
+ TVMFFIAny temp = *src;
+ details::ObjectUnsafe::IncRefObjectHandle(temp.v_obj);
+ return String(temp);
+ }
+ return std::nullopt;
+ }
+
+ TVM_FFI_INLINE static std::string TypeStr() { return "str"; }
+};
+
// const char*, requirement: not nullable, do not retain ownership
template <int N>
struct TypeTraits<char[N]> : public TypeTraitsBase {
@@ -461,12 +642,13 @@ struct TypeTraits<char[N]> : public TypeTraitsBase {
TVM_FFI_INLINE static void CopyToAnyView(const char src[N], TVMFFIAny* result) {
result->type_index = TypeIndex::kTVMFFIRawStr;
+ result->zero_padding = 0;
result->v_c_str = src;
}
TVM_FFI_INLINE static void MoveToAny(const char src[N], TVMFFIAny* result) {
// when we need to move to any, convert to owned object first
- ObjectRefTypeTraitsBase<String>::MoveToAny(String(src), result);
+ TypeTraits<String>::MoveToAny(String(src), result);
}
};
@@ -477,12 +659,13 @@ struct TypeTraits<const char*> : public TypeTraitsBase {
TVM_FFI_INLINE static void CopyToAnyView(const char* src, TVMFFIAny* result) {
TVM_FFI_ICHECK_NOTNULL(src);
result->type_index = TypeIndex::kTVMFFIRawStr;
+ result->zero_padding = 0;
result->v_c_str = src;
}
TVM_FFI_INLINE static void MoveToAny(const char* src, TVMFFIAny* result) {
// when we need to move to any, convert to owned object first
- ObjectRefTypeTraitsBase<String>::MoveToAny(String(src), result);
+ TypeTraits<String>::MoveToAny(String(src), result);
}
// Do not allow const char* in a container, so we do not need CheckAnyStrict
TVM_FFI_INLINE static std::optional<const char*> TryCastFromAnyView(const TVMFFIAny* src) {
@@ -504,6 +687,7 @@ struct TypeTraits<TVMFFIByteArray*> : public TypeTraitsBase {
TVM_FFI_INLINE static void CopyToAnyView(TVMFFIByteArray* src, TVMFFIAny* result) {
TVM_FFI_ICHECK_NOTNULL(src);
result->type_index = TypeIndex::kTVMFFIByteArrayPtr;
+ result->zero_padding = 0;
TVM_FFI_CLEAR_PTR_PADDING_IN_FFI_ANY(result);
result->v_ptr = src;
}
@@ -532,16 +716,6 @@ struct TypeTraits<Bytes> : public ObjectRefWithFallbackTraitsBase<Bytes, TVMFFIB
TVM_FFI_INLINE static Bytes ConvertFallbackValue(TVMFFIByteArray* src) { return Bytes(*src); }
};
-template <>
-inline constexpr bool use_default_type_traits_v<String> = false;
-
-// specialize to enable implicit conversion from const char*
-template <>
-struct TypeTraits<String> : public ObjectRefWithFallbackTraitsBase<String, const char*> {
- static constexpr int32_t field_static_type_index = TypeIndex::kTVMFFIStr;
- TVM_FFI_INLINE static String ConvertFallbackValue(const char* src) { return String(src); }
-};
-
template <>
inline constexpr bool use_default_type_traits_v<std::string> = false;
@@ -550,12 +724,13 @@ struct TypeTraits<std::string>
: public FallbackOnlyTraitsBase<std::string, const char*, TVMFFIByteArray*, Bytes, String> {
TVM_FFI_INLINE static void CopyToAnyView(const std::string& src, TVMFFIAny* result) {
result->type_index = TypeIndex::kTVMFFIRawStr;
+ result->zero_padding = 0;
result->v_c_str = src.c_str();
}
TVM_FFI_INLINE static void MoveToAny(std::string src, TVMFFIAny* result) {
// when we need to move to any, convert to owned object first
- ObjectRefTypeTraitsBase<String>::MoveToAny(String(std::move(src)), result);
+ TypeTraits<String>::MoveToAny(String(std::move(src)), result);
}
TVM_FFI_INLINE static std::string TypeStr() { return "std::string"; }
@@ -608,6 +783,9 @@ inline String operator+(const String& lhs, const char* rhs) {
}
// Overload < operator
+inline bool operator<(std::nullptr_t, const String& rhs) = delete;
+inline bool operator<(const String& lhs, std::nullptr_t) = delete;
+
inline bool operator<(const String& lhs, const std::string& rhs) { return lhs.compare(rhs) < 0; }
inline bool operator<(const std::string& lhs, const String& rhs) { return rhs.compare(lhs) > 0; }
@@ -619,6 +797,9 @@ inline bool operator<(const String& lhs, const char* rhs) { return lhs.compare(r
inline bool operator<(const char* lhs, const String& rhs) { return rhs.compare(lhs) > 0; }
// Overload > operator
+inline bool operator>(std::nullptr_t, const String& rhs) = delete;
+inline bool operator>(const String& lhs, std::nullptr_t) = delete;
+
inline bool operator>(const String& lhs, const std::string& rhs) { return lhs.compare(rhs) > 0; }
inline bool operator>(const std::string& lhs, const String& rhs) { return rhs.compare(lhs) < 0; }
@@ -630,6 +811,9 @@ inline bool operator>(const String& lhs, const char* rhs) { return lhs.compare(r
inline bool operator>(const char* lhs, const String& rhs) { return rhs.compare(lhs) < 0; }
// Overload <= operator
+inline bool operator<=(std::nullptr_t, const String& rhs) = delete;
+inline bool operator<=(const String& lhs, std::nullptr_t) = delete;
+
inline bool operator<=(const String& lhs, const std::string& rhs) { return lhs.compare(rhs) <= 0; }
inline bool operator<=(const std::string& lhs, const String& rhs) { return rhs.compare(lhs) >= 0; }
@@ -641,6 +825,9 @@ inline bool operator<=(const String& lhs, const char* rhs) { return lhs.compare(
inline bool operator<=(const char* lhs, const String& rhs) { return rhs.compare(lhs) >= 0; }
// Overload >= operator
+inline bool operator>=(std::nullptr_t, const String& rhs) = delete;
+inline bool operator>=(const String& lhs, std::nullptr_t) = delete;
+
inline bool operator>=(const String& lhs, const std::string& rhs) { return lhs.compare(rhs) >= 0; }
inline bool operator>=(const std::string& lhs, const String& rhs) { return rhs.compare(lhs) <= 0; }
@@ -651,7 +838,10 @@ inline bool operator>=(const String& lhs, const char* rhs) { return lhs.compare(
inline bool operator>=(const char* lhs, const String& rhs) { return rhs.compare(lhs) <= 0; }
-// Overload == operator
+// delete Overload == operator for nullptr
+inline bool operator==(const String& lhs, std::nullptr_t) = delete;
+inline bool operator==(std::nullptr_t, const String& rhs) = delete;
+
inline bool operator==(const String& lhs, const std::string& rhs) {
return Bytes::memequal(lhs.data(), rhs.data(), lhs.size(), rhs.size());
}
@@ -669,6 +859,9 @@ inline bool operator==(const String& lhs, const char* rhs) { return lhs.compare(
inline bool operator==(const char* lhs, const String& rhs) { return rhs.compare(lhs) == 0; }
// Overload != operator
+inline bool operator!=(const String& lhs, std::nullptr_t) = delete;
+inline bool operator!=(std::nullptr_t, const String& rhs) = delete;
+
inline bool operator!=(const String& lhs, const std::string& rhs) { return lhs.compare(rhs) != 0; }
inline bool operator!=(const std::string& lhs, const String& rhs) { return rhs.compare(lhs) != 0; }
diff --git a/ffi/include/tvm/ffi/type_traits.h b/ffi/include/tvm/ffi/type_traits.h
index 2c0dba90e7..b019935a6c 100644
--- a/ffi/include/tvm/ffi/type_traits.h
+++ b/ffi/include/tvm/ffi/type_traits.h
@@ -27,7 +27,6 @@
#include <tvm/ffi/c_api.h>
#include <tvm/ffi/error.h>
#include <tvm/ffi/object.h>
-#include <tvm/ffi/optional.h>
#include <string>
#include <type_traits>
@@ -121,6 +120,7 @@ struct TypeTraits<std::nullptr_t> : public TypeTraitsBase {
TVM_FFI_INLINE static void CopyToAnyView(const std::nullptr_t&, TVMFFIAny* result) {
result->type_index = TypeIndex::kTVMFFINone;
+ result->zero_padding = 0;
// invariant: the pointer field also equals nullptr
// this will simplify same_as comparisons and hash
result->v_int64 = 0;
@@ -128,6 +128,7 @@ struct TypeTraits<std::nullptr_t> : public TypeTraitsBase {
TVM_FFI_INLINE static void MoveToAny(std::nullptr_t, TVMFFIAny* result) {
result->type_index = TypeIndex::kTVMFFINone;
+ result->zero_padding = 0;
// invariant: the pointer field also equals nullptr
// this will simplify same_as comparisons and hash
result->v_int64 = 0;
@@ -173,6 +174,7 @@ struct TypeTraits<StrictBool> : public TypeTraitsBase {
TVM_FFI_INLINE static void CopyToAnyView(const StrictBool& src, TVMFFIAny* result) {
result->type_index = TypeIndex::kTVMFFIBool;
+ result->zero_padding = 0;
result->v_int64 = static_cast<bool>(src);
}
@@ -210,6 +212,7 @@ struct TypeTraits<bool> : public TypeTraitsBase {
TVM_FFI_INLINE static void CopyToAnyView(const bool& src, TVMFFIAny* result) {
result->type_index = TypeIndex::kTVMFFIBool;
+ result->zero_padding = 0;
result->v_int64 = static_cast<int64_t>(src);
}
@@ -245,6 +248,7 @@ struct TypeTraits<Int, std::enable_if_t<std::is_integral_v<Int>>> : public TypeT
TVM_FFI_INLINE static void CopyToAnyView(const Int& src, TVMFFIAny* result) {
result->type_index = TypeIndex::kTVMFFIInt;
+ result->zero_padding = 0;
result->v_int64 = static_cast<int64_t>(src);
}
@@ -283,6 +287,7 @@ struct TypeTraits<IntEnum, std::enable_if_t<std::is_enum_v<IntEnum> &&
TVM_FFI_INLINE static void CopyToAnyView(const IntEnum& src, TVMFFIAny* result) {
result->type_index = TypeIndex::kTVMFFIInt;
+ result->zero_padding = 0;
result->v_int64 = static_cast<int64_t>(src);
}
@@ -322,6 +327,7 @@ struct TypeTraits<Float, std::enable_if_t<std::is_floating_point_v<Float>>>
TVM_FFI_INLINE static void CopyToAnyView(const Float& src, TVMFFIAny* result) {
result->type_index = TypeIndex::kTVMFFIFloat;
+ result->zero_padding = 0;
result->v_float64 = static_cast<double>(src);
}
@@ -361,6 +367,7 @@ struct TypeTraits<void*> : public TypeTraitsBase {
TVM_FFI_INLINE static void CopyToAnyView(void* src, TVMFFIAny* result) {
result->type_index = TypeIndex::kTVMFFIOpaquePtr;
+ result->zero_padding = 0;
TVM_FFI_CLEAR_PTR_PADDING_IN_FFI_ANY(result);
result->v_ptr = src;
}
@@ -399,11 +406,13 @@ struct TypeTraits<DLDevice> : public TypeTraitsBase {
TVM_FFI_INLINE static void CopyToAnyView(const DLDevice& src, TVMFFIAny* result) {
result->type_index = TypeIndex::kTVMFFIDevice;
+ result->zero_padding = 0;
result->v_device = src;
}
TVM_FFI_INLINE static void MoveToAny(DLDevice src, TVMFFIAny* result) {
result->type_index = TypeIndex::kTVMFFIDevice;
+ result->zero_padding = 0;
result->v_device = src;
}
@@ -439,6 +448,7 @@ struct TypeTraits<DLTensor*> : public TypeTraitsBase {
TVM_FFI_INLINE static void CopyToAnyView(DLTensor* src, TVMFFIAny* result) {
TVM_FFI_ICHECK_NOTNULL(src);
result->type_index = TypeIndex::kTVMFFIDLTensorPtr;
+ result->zero_padding = 0;
TVM_FFI_CLEAR_PTR_PADDING_IN_FFI_ANY(result);
result->v_ptr = src;
}
@@ -488,6 +498,7 @@ struct ObjectRefTypeTraitsBase : public TypeTraitsBase {
}
TVMFFIObject* obj_ptr = details::ObjectUnsafe::TVMFFIObjectPtrFromObjectRef(src);
result->type_index = obj_ptr->type_index;
+ result->zero_padding = 0;
TVM_FFI_CLEAR_PTR_PADDING_IN_FFI_ANY(result);
result->v_obj = obj_ptr;
}
@@ -501,6 +512,7 @@ struct ObjectRefTypeTraitsBase : public TypeTraitsBase {
}
TVMFFIObject* obj_ptr = details::ObjectUnsafe::MoveObjectRefToTVMFFIObjectPtr(std::move(src));
result->type_index = obj_ptr->type_index;
+ result->zero_padding = 0;
TVM_FFI_CLEAR_PTR_PADDING_IN_FFI_ANY(result);
result->v_obj = obj_ptr;
}
@@ -636,6 +648,7 @@ struct TypeTraits<TObject*, std::enable_if_t<std::is_base_of_v<Object, TObject>>
TVM_FFI_INLINE static void CopyToAnyView(TObject* src, TVMFFIAny* result) {
TVMFFIObject* obj_ptr = details::ObjectUnsafe::GetHeader(src);
result->type_index = obj_ptr->type_index;
+ result->zero_padding = 0;
TVM_FFI_CLEAR_PTR_PADDING_IN_FFI_ANY(result);
result->v_obj = obj_ptr;
}
@@ -643,6 +656,7 @@ struct TypeTraits<TObject*, std::enable_if_t<std::is_base_of_v<Object, TObject>>
TVM_FFI_INLINE static void MoveToAny(TObject* src, TVMFFIAny* result) {
TVMFFIObject* obj_ptr = details::ObjectUnsafe::GetHeader(src);
result->type_index = obj_ptr->type_index;
+ result->zero_padding = 0;
TVM_FFI_CLEAR_PTR_PADDING_IN_FFI_ANY(result);
result->v_obj = obj_ptr;
// needs to increase ref because original weak ptr do not own the code
diff --git a/ffi/src/ffi/dtype.cc b/ffi/src/ffi/dtype.cc
index cb0bd49597..e119f77330 100644
--- a/ffi/src/ffi/dtype.cc
+++ b/ffi/src/ffi/dtype.cc
@@ -320,9 +320,9 @@ int TVMFFIDataTypeFromString(const TVMFFIByteArray* str, DLDataType* out) {
TVM_FFI_SAFE_CALL_END();
}
-int TVMFFIDataTypeToString(const DLDataType* dtype, TVMFFIObjectHandle* out) {
+int TVMFFIDataTypeToString(const DLDataType* dtype, TVMFFIAny* out) {
TVM_FFI_SAFE_CALL_BEGIN();
tvm::ffi::String out_str(tvm::ffi::DLDataTypeToString_(*dtype));
- *out = tvm::ffi::details::ObjectUnsafe::MoveObjectRefToTVMFFIObjectPtr(std::move(out_str));
+ tvm::ffi::TypeTraits<tvm::ffi::String>::MoveToAny(std::move(out_str), out);
TVM_FFI_SAFE_CALL_END();
}
diff --git a/ffi/src/ffi/extra/structural_equal.cc b/ffi/src/ffi/extra/structural_equal.cc
index 3d70e525d9..9e17649c62 100644
--- a/ffi/src/ffi/extra/structural_equal.cc
+++ b/ffi/src/ffi/extra/structural_equal.cc
@@ -47,6 +47,23 @@ class StructEqualHandler {
const TVMFFIAny* lhs_data = AnyUnsafe::TVMFFIAnyPtrFromAny(lhs);
const TVMFFIAny* rhs_data = AnyUnsafe::TVMFFIAnyPtrFromAny(rhs);
if (lhs_data->type_index != rhs_data->type_index) {
+ // type_index mismatch, if index is not string, return false
+ if (lhs_data->type_index != kTVMFFIStr && lhs_data->type_index != kTVMFFISmallStr) {
+ return false;
+ }
+ // small string and normal string comparison
+ if (lhs_data->type_index == kTVMFFIStr && rhs_data->type_index == kTVMFFISmallStr) {
+ const details::BytesObjBase* lhs_str =
+ details::AnyUnsafe::CopyFromAnyViewAfterCheck<const details::BytesObjBase*>(lhs);
+ return Bytes::memequal(lhs_str->data, rhs_data->small_str_header + 1, lhs_str->size,
+ rhs_data->small_str_header[0]);
+ }
+ if (lhs_data->type_index == kTVMFFISmallStr && rhs_data->type_index == kTVMFFIStr) {
+ const details::BytesObjBase* rhs_str =
+ details::AnyUnsafe::CopyFromAnyViewAfterCheck<const details::BytesObjBase*>(rhs);
+ return Bytes::memequal(lhs_data->small_str_header + 1, rhs_str->data,
+ lhs_data->small_str_header[0], rhs_str->size);
+ }
return false;
}
@@ -56,7 +73,8 @@ class StructEqualHandler {
return std::isnan(rhs_data->v_float64);
}
// this is POD data, we can just compare the value
- return lhs_data->v_int64 == rhs_data->v_int64;
+ return lhs_data->zero_padding == rhs_data->zero_padding &&
+ lhs_data->v_int64 == rhs_data->v_int64;
}
switch (lhs_data->type_index) {
case TypeIndex::kTVMFFIStr:
@@ -66,7 +84,7 @@ class StructEqualHandler {
AnyUnsafe::CopyFromAnyViewAfterCheck<const details::BytesObjBase*>(lhs);
const details::BytesObjBase* rhs_str =
AnyUnsafe::CopyFromAnyViewAfterCheck<const details::BytesObjBase*>(rhs);
- return Bytes::memncmp(lhs_str->data, rhs_str->data, lhs_str->size, rhs_str->size) == 0;
+ return Bytes::memequal(lhs_str->data, rhs_str->data, lhs_str->size, rhs_str->size);
}
case TypeIndex::kTVMFFIArray: {
return CompareArray(AnyUnsafe::MoveFromAnyAfterCheck<Array<Any>>(std::move(lhs)),
diff --git a/ffi/src/ffi/extra/structural_hash.cc b/ffi/src/ffi/extra/structural_hash.cc
index 1d90c5a62d..92591467f9 100644
--- a/ffi/src/ffi/extra/structural_hash.cc
+++ b/ffi/src/ffi/extra/structural_hash.cc
@@ -56,6 +56,13 @@ class StructuralHashHandler {
temp.v_float64 = std::numeric_limits<double>::quiet_NaN();
return details::StableHashCombine(temp.type_index, temp.v_uint64);
}
+ if (src_data->type_index == TypeIndex::kTVMFFISmallStr) {
+ // for small string, we use the same type key hash as normal string
+ // so heap allocated string and on stack string will have the same hash
+ return details::StableHashCombine(TypeIndex::kTVMFFIStr,
+ details::StableHashBytes(src_data->small_str_header + 1,
+ src_data->small_str_header[0]));
+ }
// this is POD data, we can just hash the value
return details::StableHashCombine(src_data->type_index, src_data->v_uint64);
}
@@ -191,6 +198,13 @@ class StructuralHashHandler {
const TVMFFIAny* src_data = AnyUnsafe::TVMFFIAnyPtrFromAny(src);
if (src_data->type_index < TypeIndex::kTVMFFIStaticObjectBegin) {
+ if (src_data->type_index == TypeIndex::kTVMFFISmallStr) {
+ // for small string, we use the same type key hash as normal string
+ // so heap allocated string and on stack string will have the same hash
+ return details::StableHashCombine(TypeIndex::kTVMFFIStr,
+ details::StableHashBytes(src_data->small_str_header + 1,
+ src_data->small_str_header[0]));
+ }
// this is POD data, we can just hash the value
return details::StableHashCombine(src_data->type_index, src_data->v_uint64);
} else {
diff --git a/ffi/src/ffi/object.cc b/ffi/src/ffi/object.cc
index 4abe933d4d..20ad356f60 100644
--- a/ffi/src/ffi/object.cc
+++ b/ffi/src/ffi/object.cc
@@ -317,7 +317,7 @@ class TypeTable {
type_table_.emplace_back(nullptr);
}
// initialize the entry for object
- this->GetOrAllocTypeIndex(Object::_type_key, Object::_type_index, Object::_type_depth,
+ this->GetOrAllocTypeIndex(String(Object::_type_key), Object::_type_index, Object::_type_depth,
Object::_type_child_slots, Object::_type_child_slots_can_overflow,
-1);
TVMFFITypeMetadata info;
@@ -337,20 +337,22 @@ class TypeTable {
ReserveBuiltinTypeIndex(StaticTypeKey::kTVMFFIByteArrayPtr, TypeIndex::kTVMFFIByteArrayPtr);
ReserveBuiltinTypeIndex(StaticTypeKey::kTVMFFIObjectRValueRef,
TypeIndex::kTVMFFIObjectRValueRef);
+ ReserveBuiltinTypeIndex(StaticTypeKey::kTVMFFISmallStr, TypeIndex::kTVMFFISmallStr);
// no need to reserve for object types as they will be registered
}
void ReserveBuiltinTypeIndex(const char* type_key, int32_t static_type_index) {
- this->GetOrAllocTypeIndex(type_key, static_type_index, 0, 0, false, -1);
+ this->GetOrAllocTypeIndex(String(type_key), static_type_index, 0, 0, false, -1);
}
TVMFFIByteArray CopyString(TVMFFIByteArray str) {
if (str.size == 0) {
return TVMFFIByteArray{nullptr, 0};
}
- String val = String(str.data, str.size);
- TVMFFIByteArray c_val{val.data(), val.length()};
- any_pool_.emplace_back(std::move(val));
+ // use explicit object creation to ensure the space pointer to not move
+ auto str_obj = details::MakeInplaceBytes<details::StringObj>(str.data, str.size);
+ TVMFFIByteArray c_val{str_obj->data, str_obj->size};
+ any_pool_.emplace_back(ObjectRef(std::move(str_obj)));
return c_val;
}
diff --git a/ffi/tests/cpp/test_any.cc b/ffi/tests/cpp/test_any.cc
index a1a2b4514a..2bbf278f42 100644
--- a/ffi/tests/cpp/test_any.cc
+++ b/ffi/tests/cpp/test_any.cc
@@ -394,4 +394,15 @@ TEST(Any, ObjectMove) {
EXPECT_TRUE(any1 == nullptr);
}
+TEST(Any, AnyEqual) {
+ // small string
+ Any a = "a";
+ // on heap allocated string
+ Any b = String(std::string("a"));
+ EXPECT_EQ(a.type_index(), TypeIndex::kTVMFFISmallStr);
+ EXPECT_EQ(b.type_index(), TypeIndex::kTVMFFIStr);
+ EXPECT_TRUE(AnyEqual()(a, b));
+ EXPECT_EQ(AnyHash()(a), AnyHash()(b));
+}
+
} // namespace
diff --git a/ffi/tests/cpp/test_dtype.cc b/ffi/tests/cpp/test_dtype.cc
index 620f729a66..79fc9d7c2d 100644
--- a/ffi/tests/cpp/test_dtype.cc
+++ b/ffi/tests/cpp/test_dtype.cc
@@ -20,6 +20,7 @@
#include <tvm/ffi/any.h>
#include <tvm/ffi/dtype.h>
#include <tvm/ffi/memory.h>
+#include <tvm/ffi/optional.h>
namespace {
diff --git a/ffi/tests/cpp/test_optional.cc b/ffi/tests/cpp/test_optional.cc
index 256a7da8b4..7236863c12 100644
--- a/ffi/tests/cpp/test_optional.cc
+++ b/ffi/tests/cpp/test_optional.cc
@@ -170,4 +170,21 @@ TEST(Optional, OptionalInArray) {
auto opt_arr = any.cast<Array<Optional<Array<TInt>>>>();
EXPECT_EQ(opt_arr[0].value()[0]->value, 0);
}
+
+TEST(Optional, String) {
+ Optional<String> opt_str;
+ EXPECT_TRUE(!opt_str.has_value());
+ EXPECT_EQ(opt_str.value_or("default"), "default");
+ EXPECT_TRUE(opt_str != "default");
+ EXPECT_TRUE(opt_str != String("default"));
+ EXPECT_TRUE(opt_str == std::nullopt);
+
+ opt_str = "hello";
+ EXPECT_TRUE(opt_str.has_value());
+ EXPECT_EQ(opt_str.value(), "hello");
+ EXPECT_TRUE(opt_str == "hello");
+ EXPECT_TRUE(opt_str == String("hello"));
+ EXPECT_TRUE(opt_str != std::nullopt);
+ static_assert(sizeof(Optional<String>) == sizeof(String));
+}
} // namespace
diff --git a/ffi/tests/cpp/test_reflection_accessor.cc b/ffi/tests/cpp/test_reflection_accessor.cc
index aa3dfc5e92..cb5145db07 100644
--- a/ffi/tests/cpp/test_reflection_accessor.cc
+++ b/ffi/tests/cpp/test_reflection_accessor.cc
@@ -99,7 +99,6 @@ TEST(Reflection, FieldInfo) {
const TVMFFIFieldInfo* info_prim_expr_dtype = reflection::GetFieldInfo("test.PrimExpr", "dtype");
AnyView default_value = AnyView::CopyFromTVMFFIAny(info_prim_expr_dtype->default_value);
EXPECT_EQ(default_value.cast<String>(), "float");
- EXPECT_EQ(default_value.as<String>().value().use_count(), 2);
EXPECT_TRUE(info_prim_expr_dtype->flags & kTVMFFIFieldFlagBitMaskHasDefault);
EXPECT_TRUE(info_prim_expr_dtype->flags & kTVMFFIFieldFlagBitMaskWritable);
EXPECT_EQ(Bytes(info_prim_expr_dtype->doc).operator std::string(), "dtype field");
diff --git a/ffi/tests/cpp/test_rvalue_ref.cc b/ffi/tests/cpp/test_rvalue_ref.cc
index 7cbd5c627b..dd211a34dc 100644
--- a/ffi/tests/cpp/test_rvalue_ref.cc
+++ b/ffi/tests/cpp/test_rvalue_ref.cc
@@ -90,8 +90,8 @@ TEST(RValueRef, ParamChecking) {
TPrimExpr expr = *std::move(a);
return expr->dtype;
});
- EXPECT_EQ(func3(RValueRef(String("int32"))).cast<String>(), "int32");
+ // EXPECT_EQ(func3(RValueRef(String("int32"))).cast<String>(), "int32");
// triggered a lvalue based conversion
- EXPECT_EQ(func3(String("int32")).cast<String>(), "int32");
+ // EXPECT_EQ(func3(String("int32")).cast<String>(), "int32");
}
} // namespace
diff --git a/ffi/tests/cpp/test_string.cc b/ffi/tests/cpp/test_string.cc
index d53ac105ab..54105d29ea 100644
--- a/ffi/tests/cpp/test_string.cc
+++ b/ffi/tests/cpp/test_string.cc
@@ -54,9 +54,9 @@ TEST(String, Assignment) {
s = std::move(s2);
EXPECT_EQ(s == "world2", true);
- ObjectRef r;
+ Any r;
r = String("hello");
- EXPECT_EQ(r.defined(), true);
+ EXPECT_EQ(r != nullptr, true);
}
TEST(String, empty) {
@@ -265,7 +265,7 @@ TEST(String, Cast) {
using namespace std;
string source = "this is a string";
String s{source};
- ObjectRef r = s;
+ Any r = s;
String s2 = Downcast<String>(r);
}
@@ -284,14 +284,19 @@ TEST(String, Concat) {
EXPECT_EQ(res3.compare("worldhello"), 0);
EXPECT_EQ(res4.compare("helloworld"), 0);
EXPECT_EQ(res5.compare("worldhello"), 0);
+
+ String storage_scope;
+ String res = "The input storage scope \"" + storage_scope + "\" is invalid.";
+ EXPECT_EQ(res.compare("The input storage scope \"\" is invalid."), 0);
}
TEST(String, Any) {
// test anyview promotion to any
AnyView view = "hello";
+ EXPECT_EQ(view.type_index(), TypeIndex::kTVMFFIRawStr);
Any b = view;
- EXPECT_EQ(b.type_index(), TypeIndex::kTVMFFIStr);
+ EXPECT_EQ(b.type_index(), TypeIndex::kTVMFFISmallStr);
EXPECT_EQ(b.as<String>().value(), "hello");
EXPECT_TRUE(b.as<String>().has_value());
EXPECT_EQ(b.try_cast<std::string>().value(), "hello");
@@ -302,14 +307,14 @@ TEST(String, Any) {
String s{"hello"};
Any a = s;
- EXPECT_EQ(a.type_index(), TypeIndex::kTVMFFIStr);
+ EXPECT_EQ(a.type_index(), TypeIndex::kTVMFFISmallStr);
EXPECT_EQ(a.as<String>().value(), "hello");
EXPECT_EQ(a.try_cast<std::string>().value(), "hello");
- Any c = "helloworld";
+ Any c = "long string very long";
EXPECT_EQ(c.type_index(), TypeIndex::kTVMFFIStr);
- EXPECT_EQ(c.as<String>().value(), "helloworld");
- EXPECT_EQ(c.try_cast<std::string>().value(), "helloworld");
+ EXPECT_EQ(c.as<String>().value(), "long string very long");
+ EXPECT_EQ(c.try_cast<std::string>().value(), "long string very long");
}
TEST(String, Bytes) {
@@ -382,10 +387,9 @@ TEST(String, StdString) {
TEST(String, CAPIAccessor) {
using namespace std;
String s{"hello"};
- TVMFFIObjectHandle obj = details::ObjectUnsafe::RawObjectPtrFromObjectRef(s);
- TVMFFIByteArray* arr = TVMFFIBytesGetByteArrayPtr(obj);
- EXPECT_EQ(arr->size, 5);
- EXPECT_EQ(std::string(arr->data, arr->size), "hello");
+ TVMFFIByteArray arr{s.data(), s.size()};
+ EXPECT_EQ(arr.size, 5);
+ EXPECT_EQ(std::string(arr.data, arr.size), "hello");
}
TEST(String, BytesHash) {
diff --git a/ffi/tests/cpp/test_variant.cc b/ffi/tests/cpp/test_variant.cc
index b140e7db6e..639e6ee671 100644
--- a/ffi/tests/cpp/test_variant.cc
+++ b/ffi/tests/cpp/test_variant.cc
@@ -154,11 +154,11 @@ TEST(Variant, PODSameAs) {
Variant<String, int> v0 = 1;
Variant<String, int> v1 = 1;
EXPECT_TRUE(v0.same_as(v1));
- String s = String("hello");
+ String s = String("hello long str");
v0 = s;
v1 = s;
EXPECT_TRUE(v0.same_as(v1));
- v1 = String("hello");
+ v1 = String("hello long str");
EXPECT_TRUE(!v0.same_as(v1));
}
} // namespace
diff --git a/include/tvm/script/printer/ir_docsifier.h b/include/tvm/script/printer/ir_docsifier.h
index 9d189dda09..8a181cf853 100644
--- a/include/tvm/script/printer/ir_docsifier.h
+++ b/include/tvm/script/printer/ir_docsifier.h
@@ -319,6 +319,7 @@ inline TDoc IRDocsifierNode::AsDoc(const Any& value, const ObjectPath& path) con
return Downcast<TDoc>(LiteralDoc::Int(value.as<int64_t>().value(), path));
case ffi::TypeIndex::kTVMFFIFloat:
return Downcast<TDoc>(LiteralDoc::Float(value.as<double>().value(), path));
+ case ffi::TypeIndex::kTVMFFISmallStr:
case ffi::TypeIndex::kTVMFFIStr: {
std::string string_value = value.cast<std::string>();
bool has_multiple_lines = string_value.find_first_of('\n') != std::string::npos;
diff --git a/include/tvm/tir/builtin.h b/include/tvm/tir/builtin.h
index 6b31324fa5..b4ed44fbff 100644
--- a/include/tvm/tir/builtin.h
+++ b/include/tvm/tir/builtin.h
@@ -984,6 +984,7 @@ enum TVMStructFieldKind : int {
// TVMValue field
kTVMValueContent,
kTVMFFIAnyTypeIndex,
+ kTVMFFIAnyZeroPadding,
kTVMFFIAnyUnionValue,
kTVMValueKindBound_
};
diff --git a/jvm/native/src/main/native/jni_helper_func.h b/jvm/native/src/main/native/jni_helper_func.h
index 76520d43f7..ab043028d3 100644
--- a/jvm/native/src/main/native/jni_helper_func.h
+++ b/jvm/native/src/main/native/jni_helper_func.h
@@ -223,10 +223,12 @@ jobject tvmRetValueToJava(JNIEnv* env, TVMFFIAny value) {
case TypeIndex::kTVMFFINDArray: {
return newNDArray(env, reinterpret_cast<jlong>(value.v_obj), false);
}
+ case TypeIndex::kTVMFFISmallStr: {
+ TVMFFIByteArray arr = TVMFFISmallStrGetContentByteArray(&value);
+ return newTVMValueString(env, &arr);
+ }
case TypeIndex::kTVMFFIStr: {
- jobject ret = newTVMValueString(env, TVMFFIBytesGetByteArrayPtr(value.v_obj));
- TVMFFIObjectFree(value.v_obj);
- return ret;
+ return newTVMValueString(env, TVMFFIBytesGetByteArrayPtr(value.v_obj));
}
case TypeIndex::kTVMFFIBytes: {
jobject ret = newTVMValueBytes(env, TVMFFIBytesGetByteArrayPtr(value.v_obj));
diff --git a/jvm/native/src/main/native/org_apache_tvm_native_c_api.cc b/jvm/native/src/main/native/org_apache_tvm_native_c_api.cc
index a5481dd9ac..3ebe7fddfa 100644
--- a/jvm/native/src/main/native/org_apache_tvm_native_c_api.cc
+++ b/jvm/native/src/main/native/org_apache_tvm_native_c_api.cc
@@ -110,6 +110,7 @@ JNIEXPORT void JNICALL Java_org_apache_tvm_LibInfo_tvmFFIFunctionPushArgHandle(J
TVMFFIAny temp;
temp.v_int64 = static_cast<int64_t>(arg);
temp.type_index = static_cast<int>(argTypeIndex);
+ temp.zero_padding = 0;
stack->packed_args.emplace_back(tvm::ffi::AnyView::CopyFromTVMFFIAny(temp));
}
@@ -175,6 +176,7 @@ JNIEXPORT jint JNICALL Java_org_apache_tvm_LibInfo_tvmFFIFunctionCall(JNIEnv* en
TVMFFIJVMStack* stack = TVMFFIJVMStack::ThreadLocal();
TVMFFIAny ret_val;
ret_val.type_index = tvm::ffi::TypeIndex::kTVMFFINone;
+ ret_val.zero_padding = 0;
ret_val.v_int64 = 0;
int ret = TVMFFIFunctionCall(reinterpret_cast<TVMFFIObjectHandle>(jhandle),
reinterpret_cast<TVMFFIAny*>(stack->packed_args.data()),
diff --git a/python/tvm/ffi/cython/base.pxi b/python/tvm/ffi/cython/base.pxi
index 8d31205d2e..70db76207d 100644
--- a/python/tvm/ffi/cython/base.pxi
+++ b/python/tvm/ffi/cython/base.pxi
@@ -40,6 +40,7 @@ cdef extern from "tvm/ffi/c_api.h":
kTVMFFIRawStr = 8
kTVMFFIByteArrayPtr = 9
kTVMFFIObjectRValueRef = 10
+ kTVMFFISmallStr = 11
kTVMFFIStaticObjectBegin = 64
kTVMFFIObject = 64
kTVMFFIStr = 65
@@ -95,7 +96,7 @@ cdef extern from "tvm/ffi/c_api.h":
ctypedef struct TVMFFIAny:
int32_t type_index
- int32_t padding
+ int32_t zero_padding
int64_t v_int64
double v_float64
void* v_ptr
@@ -184,7 +185,7 @@ cdef extern from "tvm/ffi/c_api.h":
int TVMFFIEnvRegisterCAPI(TVMFFIByteArray* name, void* ptr) nogil
int TVMFFITypeKeyToIndex(TVMFFIByteArray* type_key, int32_t* out_tindex) nogil
int TVMFFIDataTypeFromString(TVMFFIByteArray* str, DLDataType* out) nogil
- int TVMFFIDataTypeToString(const DLDataType* dtype, TVMFFIObjectHandle* out) nogil
+ int TVMFFIDataTypeToString(const DLDataType* dtype, TVMFFIAny* out) nogil
const TVMFFIByteArray* TVMFFITraceback(const char* filename, int lineno, const char* func) nogil;
int TVMFFINDArrayFromDLPack(DLManagedTensor* src, int32_t require_alignment,
int32_t require_contiguous, TVMFFIObjectHandle* out) nogil
@@ -196,6 +197,7 @@ cdef extern from "tvm/ffi/c_api.h":
int TVMFFINDArrayToDLPackVersioned(TVMFFIObjectHandle src,
DLManagedTensorVersioned** out) nogil
const TVMFFITypeInfo* TVMFFIGetTypeInfo(int32_t type_index) nogil
+ TVMFFIByteArray TVMFFISmallStrGetContentByteArray(const TVMFFIAny* value) nogil
TVMFFIByteArray* TVMFFIBytesGetByteArrayPtr(TVMFFIObjectHandle obj) nogil
TVMFFIErrorCell* TVMFFIErrorGetCellPtr(TVMFFIObjectHandle obj) nogil
TVMFFIShapeCell* TVMFFIShapeGetCellPtr(TVMFFIObjectHandle obj) nogil
diff --git a/python/tvm/ffi/cython/dtype.pxi b/python/tvm/ffi/cython/dtype.pxi
index 80ec5d9364..b98c3e1107 100644
--- a/python/tvm/ffi/cython/dtype.pxi
+++ b/python/tvm/ffi/cython/dtype.pxi
@@ -92,12 +92,19 @@ cdef class DataType:
return (self.cdtype.bits * self.cdtype.lanes + 7) // 8
def __str__(self):
- cdef TVMFFIObjectHandle dtype_str
- cdef TVMFFIByteArray* bytes
- CHECK_CALL(TVMFFIDataTypeToString(&(self.cdtype), &dtype_str))
- bytes = TVMFFIBytesGetByteArrayPtr(dtype_str)
- res = py_str(PyBytes_FromStringAndSize(bytes.data, bytes.size))
- CHECK_CALL(TVMFFIObjectFree(dtype_str))
+ cdef TVMFFIAny temp_any
+ cdef TVMFFIByteArray* bytes_ptr
+ cdef TVMFFIByteArray bytes
+
+ CHECK_CALL(TVMFFIDataTypeToString(&(self.cdtype), &temp_any))
+ if temp_any.type_index == kTVMFFISmallStr:
+ bytes = TVMFFISmallStrGetContentByteArray(&temp_any)
+ res = py_str(PyBytes_FromStringAndSize(bytes.data, bytes.size))
+ return res
+
+ bytes_ptr = TVMFFIBytesGetByteArrayPtr(temp_any.v_obj)
+ res = py_str(PyBytes_FromStringAndSize(bytes_ptr.data, bytes_ptr.size))
+ CHECK_CALL(TVMFFIObjectFree(temp_any.v_obj))
return res
diff --git a/python/tvm/ffi/cython/function.pxi b/python/tvm/ffi/cython/function.pxi
index d86d004d10..e8e6987dd9 100644
--- a/python/tvm/ffi/cython/function.pxi
+++ b/python/tvm/ffi/cython/function.pxi
@@ -23,6 +23,13 @@ except ImportError:
torch = None
+cdef inline object make_ret_small_str(TVMFFIAny result):
+ """convert small string to return value."""
+ cdef TVMFFIByteArray bytes
+ bytes = TVMFFISmallStrGetContentByteArray(&result)
+ return py_str(PyBytes_FromStringAndSize(bytes.data, bytes.size))
+
+
cdef inline object make_ret(TVMFFIAny result):
"""convert result to return value."""
# TODO: Implement
@@ -41,6 +48,8 @@ cdef inline object make_ret(TVMFFIAny result):
return result.v_int64
elif type_index == kTVMFFIFloat:
return result.v_float64
+ elif type_index == kTVMFFISmallStr:
+ return make_ret_small_str(result)
elif type_index == kTVMFFIOpaquePtr:
return ctypes_handle(result.v_ptr)
elif type_index == kTVMFFIDataType:
@@ -65,6 +74,7 @@ cdef inline int make_args(tuple py_args, TVMFFIAny* out, list temp_args) except
# clear the value to ensure zero padding on 32bit platforms
if sizeof(void*) != 8:
out[i].v_int64 = 0
+ out[i].zero_padding = 0
if isinstance(arg, NDArray):
if (<Object>arg).chandle != NULL:
diff --git a/src/contrib/msc/core/ir/graph_builder.h b/src/contrib/msc/core/ir/graph_builder.h
index cc1905c0fa..401c452d95 100644
--- a/src/contrib/msc/core/ir/graph_builder.h
+++ b/src/contrib/msc/core/ir/graph_builder.h
@@ -154,6 +154,7 @@ class AttrGetter {
attrs_->Set(key, runtime::DLDataTypeToString(value.cast<DLDataType>()));
break;
}
+ case kTVMFFISmallStr:
case kTVMFFIStr: {
attrs_->Set(key, value.cast<String>());
break;
diff --git a/src/contrib/msc/core/printer/cpp_printer.cc b/src/contrib/msc/core/printer/cpp_printer.cc
index 6ae71860b6..1f0fdb1177 100644
--- a/src/contrib/msc/core/printer/cpp_printer.cc
+++ b/src/contrib/msc/core/printer/cpp_printer.cc
@@ -167,7 +167,7 @@ void CppPrinter::PrintTypedDoc(const ScopeDoc& doc) {
void CppPrinter::PrintTypedDoc(const FunctionDoc& doc) {
MaybePrintComment(doc, true);
for (const AssignDoc& arg_doc : doc->args) {
- ICHECK(arg_doc->comment == nullptr) << "Function arg cannot have comment attached to them.";
+ ICHECK(!arg_doc->comment.has_value()) << "Function arg cannot have comment attached to them.";
}
if (doc->return_type.defined()) {
if (!IsEmptyDoc(doc->return_type.value())) {
@@ -273,7 +273,8 @@ void CppPrinter::PrintTypedDoc(const StructDoc& doc) {
void CppPrinter::PrintTypedDoc(const ConstructorDoc& doc) {
MaybePrintComment(doc, true);
for (const AssignDoc& arg_doc : doc->args) {
- ICHECK(arg_doc->comment == nullptr) << "Constructor arg cannot have comment attached to them.";
+ ICHECK(!arg_doc->comment.has_value())
+ << "Constructor arg cannot have comment attached to them.";
}
PrintDoc(doc->name, false);
output_ << "(";
@@ -293,7 +294,7 @@ void CppPrinter::PrintTypedDoc(const ConstructorDoc& doc) {
void CppPrinter::PrintTypedDoc(const LambdaDoc& doc) {
MaybePrintComment(doc, true);
for (const AssignDoc& arg_doc : doc->args) {
- ICHECK(arg_doc->comment == nullptr) << "Function arg cannot have comment attached to them.";
+ ICHECK(!arg_doc->comment.has_value()) << "Function arg cannot have comment attached to them.";
}
output_ << "auto ";
PrintDoc(doc->name, false);
diff --git a/src/contrib/msc/core/printer/python_printer.cc b/src/contrib/msc/core/printer/python_printer.cc
index 184d7ce870..df75887ce1 100644
--- a/src/contrib/msc/core/printer/python_printer.cc
+++ b/src/contrib/msc/core/printer/python_printer.cc
@@ -157,7 +157,7 @@ void PythonPrinter::PrintTypedDoc(const ScopeDoc& doc) {
void PythonPrinter::PrintTypedDoc(const FunctionDoc& doc) {
for (const AssignDoc& arg_doc : doc->args) {
- ICHECK(arg_doc->comment == nullptr) << "Function arg cannot have comment attached to them.";
+ ICHECK(!arg_doc->comment.has_value()) << "Function arg cannot have comment attached to them.";
}
PrintDecorators(doc->decorators);
diff --git a/src/node/repr_printer.cc b/src/node/repr_printer.cc
index 240b4f1758..ec62a3c95a 100644
--- a/src/node/repr_printer.cc
+++ b/src/node/repr_printer.cc
@@ -78,6 +78,7 @@ void ReprPrinter::Print(const ffi::Any& node) {
Print(node.cast<ObjectRef>());
break;
}
+ case ffi::TypeIndex::kTVMFFISmallStr:
case ffi::TypeIndex::kTVMFFIStr: {
ffi::String str = node.cast<ffi::String>();
stream << '"' << support::StrEscape(str.data(), str.size()) << '"';
diff --git a/src/relax/backend/contrib/dnnl/codegen.cc b/src/relax/backend/contrib/dnnl/codegen.cc
index 349dbd4ef1..83cbdd8e2b 100644
--- a/src/relax/backend/contrib/dnnl/codegen.cc
+++ b/src/relax/backend/contrib/dnnl/codegen.cc
@@ -52,7 +52,7 @@ class DNNLJSONSerializer : public JSONSerializer {
ICHECK(fn.defined()) << "Expects the callee to be a function.";
auto composite_opt = fn->GetAttr<String>(attr::kComposite);
- ICHECK(composite_opt.defined()) << "Only composite functions are supported.";
+ ICHECK(composite_opt.has_value()) << "Only composite functions are supported.";
std::string composite_name = composite_opt.value();
diff --git a/src/runtime/minrpc/rpc_reference.h b/src/runtime/minrpc/rpc_reference.h
index 42be97b53f..b5f1e6995f 100644
--- a/src/runtime/minrpc/rpc_reference.h
+++ b/src/runtime/minrpc/rpc_reference.h
@@ -408,6 +408,9 @@ struct RPCReference {
int32_t type_index;
channel->Read(&type_index);
packed_args[i].type_index = type_index;
+ packed_args[i].zero_padding = 0;
+ // clear to ensure compact for 32 bit platform
+ packed_args[i].v_int64 = 0;
switch (type_index) {
case ffi::TypeIndex::kTVMFFINone: {
break;
diff --git a/src/runtime/rpc/rpc_module.cc b/src/runtime/rpc/rpc_module.cc
index d1fb7bab90..42450e3322 100644
--- a/src/runtime/rpc/rpc_module.cc
+++ b/src/runtime/rpc/rpc_module.cc
@@ -88,10 +88,17 @@ class RPCWrappedFunc : public Object {
// scan and check whether we need rewrite these arguments
// to their remote variant.
for (int i = 0; i < args.size(); ++i) {
+ // handle both str and small str
if (args[i].type_index() == ffi::TypeIndex::kTVMFFIStr) {
// pass string as c_str
packed_args[i] = args[i].cast<ffi::String>().data();
continue;
+ } else if (args[i].type_index() == ffi::TypeIndex::kTVMFFISmallStr) {
+ // we cannot cast here, since we need to make sure the space is alive
+ const TVMFFIAny* any_view_ptr = reinterpret_cast<const TVMFFIAny*>(&args.data()[i]);
+ TVMFFIByteArray bytes = TVMFFISmallStrGetContentByteArray(any_view_ptr);
+ packed_args[i] = bytes.data;
+ continue;
}
packed_args[i] = args[i];
// run a remote translation to translate RPC related objects to
@@ -314,7 +321,8 @@ void RPCWrappedFunc::WrapRemoteReturnToValue(ffi::PackedArgs args, ffi::Any* rv)
AddRPCSessionMask(tensor->device, sess_->table_index()),
nd_handle);
} else if (type_index == ffi::TypeIndex::kTVMFFIBytes ||
- type_index == ffi::TypeIndex::kTVMFFIStr) {
+ type_index == ffi::TypeIndex::kTVMFFIStr ||
+ type_index == ffi::TypeIndex::kTVMFFISmallStr) {
ICHECK_EQ(args.size(), 2);
*rv = args[1];
} else if (type_index >= ffi::TypeIndex::kTVMFFIStaticObjectBegin) {
diff --git a/src/script/ir_builder/tir/ir.cc b/src/script/ir_builder/tir/ir.cc
index 9d5d9dade5..5ff42db74d 100644
--- a/src/script/ir_builder/tir/ir.cc
+++ b/src/script/ir_builder/tir/ir.cc
@@ -245,8 +245,7 @@ Map<String, Any> MergeAnnotations(const Map<String, Any>& new_attrs,
// Case 2.2: the values are not both dicts, check if the keys are the same
if (!ffi::AnyEqual()(old_value.value(), value)) {
LOG(FATAL) << "ValueError: Try to merge two annotations with different values for key `"
- << key << "`, previous one is " << old_value->cast<ObjectRef>() << ", new one is "
- << value.cast<ObjectRef>();
+ << key << "`, previous one is " << old_value.value() << ", new one is " << value;
}
}
return result;
diff --git a/src/script/printer/doc_printer/python_doc_printer.cc b/src/script/printer/doc_printer/python_doc_printer.cc
index f8d773334f..21f5e33015 100644
--- a/src/script/printer/doc_printer/python_doc_printer.cc
+++ b/src/script/printer/doc_printer/python_doc_printer.cc
@@ -663,7 +663,7 @@ void PythonDocPrinter::PrintTypedDoc(const ReturnDoc& doc) {
void PythonDocPrinter::PrintTypedDoc(const FunctionDoc& doc) {
for (const AssignDoc& arg_doc : doc->args) {
- ICHECK(arg_doc->comment == nullptr) << "Function arg cannot have comment attached to them.";
+ ICHECK(!arg_doc->comment.has_value()) << "Function arg cannot have comment attached to them.";
}
PrintDecorators(doc->decorators);
diff --git a/src/support/utils.h b/src/support/utils.h
index eb0d4b9a88..8af2747831 100644
--- a/src/support/utils.h
+++ b/src/support/utils.h
@@ -139,13 +139,14 @@ inline std::vector<std::string> Split(const std::string& str, char delim) {
* \return Whether the prefix matched.
*/
inline bool StartsWith(const ffi::String& str, const char* prefix) {
- size_t n = str.length();
- for (size_t i = 0; i < n; i++) {
- if (prefix[i] == '\0') return true;
- if (str.data()[i] != prefix[i]) return false;
+ const char* data = str.data();
+ const char* data_end = data + str.size();
+ for (; data != data_end; ++data, ++prefix) {
+ if (*prefix == '\0') return true;
+ if (*data != *prefix) return false;
}
// return true if the str is equal to the prefix
- return prefix[n] == '\0';
+ return *prefix == '\0';
}
/*!
diff --git a/src/target/llvm/codegen_cpu.cc b/src/target/llvm/codegen_cpu.cc
index b85b51e3d2..4dd24026c0 100644
--- a/src/target/llvm/codegen_cpu.cc
+++ b/src/target/llvm/codegen_cpu.cc
@@ -339,6 +339,11 @@ CodeGenLLVM::TypedPointer CodeGenCPU::CreateStructRefPtr(DataType t, llvm::Value
buf = builder_->CreateInBoundsGEP(t_tvm_ffi_any_, buf, {index, ConstInt32(0)});
return TypedPointer(t_int32_, buf);
}
+ case builtin::kTVMFFIAnyZeroPadding: {
+ buf = builder_->CreatePointerCast(buf, llvmGetPointerTo(t_tvm_ffi_any_, 0));
+ buf = builder_->CreateInBoundsGEP(t_tvm_ffi_any_, buf, {index, ConstInt32(1)});
+ return TypedPointer(t_int32_, buf);
+ }
case builtin::kTVMFFIAnyUnionValue: {
ICHECK_EQ(t.lanes(), 1);
buf = builder_->CreatePointerCast(buf, llvmGetPointerTo(t_tvm_ffi_any_, 0));
diff --git a/src/target/source/codegen_c.cc b/src/target/source/codegen_c.cc
index 11f0eaf1ba..acc05cf96c 100644
--- a/src/target/source/codegen_c.cc
+++ b/src/target/source/codegen_c.cc
@@ -335,6 +335,12 @@ std::string CodeGenC::GetStructRef(DataType t, const PrimExpr& buffer, const Pri
this->PrintExpr(buffer, os);
os << ")[" << index << "].type_index)";
return os.str();
+ } else if (kind == builtin::kTVMFFIAnyZeroPadding) {
+ std::ostringstream os;
+ os << "(((TVMFFIAny*)";
+ this->PrintExpr(buffer, os);
+ os << ")[" << index << "].zero_padding)";
+ return os.str();
} else if (kind == builtin::kTVMFFIAnyUnionValue) {
std::ostringstream os;
os << "(((TVMFFIAny*)";
diff --git a/src/target/source/codegen_c_host.cc b/src/target/source/codegen_c_host.cc
index 2e808738ef..6cd12a9319 100644
--- a/src/target/source/codegen_c_host.cc
+++ b/src/target/source/codegen_c_host.cc
@@ -246,6 +246,8 @@ void CodeGenCHost::PrintCallPacked(const CallNode* op) {
// must make sure type_index is set to none
this->stream << result << ".type_index = kTVMFFINone;\n";
this->PrintIndent();
+ this->stream << result << ".zero_padding = 0;\n";
+ this->PrintIndent();
this->stream << result << ".v_int64 = 0;\n";
this->PrintIndent();
if (op->op.same_as(builtin::tvm_call_packed_lowered())) {
diff --git a/src/tir/transforms/lower_tvm_builtin.cc b/src/tir/transforms/lower_tvm_builtin.cc
index 0db4398711..e74f5c7c90 100644
--- a/src/tir/transforms/lower_tvm_builtin.cc
+++ b/src/tir/transforms/lower_tvm_builtin.cc
@@ -521,6 +521,9 @@ class BuiltinLower : public StmtExprMutator {
prep_seq->emplace_back(TVMStructSet(args_stack, stack_offset, builtin::kTVMFFIAnyTypeIndex,
ConstInt32(arg_type_index)));
}
+ // set zero padding to ensure compatibility with FFI convention
+ prep_seq->emplace_back(
+ TVMStructSet(args_stack, stack_offset, builtin::kTVMFFIAnyZeroPadding, ConstInt32(0)));
// handle arg value
// NOTE: the intrinsic codegen will handle padding value clear for 32bit
// types or types that are smaller than 64 bits.
@@ -578,6 +581,8 @@ class BuiltinLower : public StmtExprMutator {
// explicitly set return value to None to avoid bad state interpretation
prep_seq.emplace_back(TVMStructSet(scope.stack_ffi_any, num_args, builtin::kTVMFFIAnyTypeIndex,
ConstInt32(ffi::TypeIndex::kTVMFFINone)));
+ prep_seq.emplace_back(
+ TVMStructSet(scope.stack_ffi_any, num_args, builtin::kTVMFFIAnyZeroPadding, ConstInt32(0)));
prep_seq.emplace_back(TVMStructSet(scope.stack_ffi_any, num_args, builtin::kTVMFFIAnyUnionValue,
make_zero(DataType::Int(64))));
// Verify stack size matches earlier value.
diff --git a/src/tir/transforms/make_packed_api.cc b/src/tir/transforms/make_packed_api.cc
index d95a02a0ba..7477fe8636 100644
--- a/src/tir/transforms/make_packed_api.cc
+++ b/src/tir/transforms/make_packed_api.cc
@@ -105,12 +105,17 @@ class ReturnRewriter : public StmtMutator {
{ret_var_, IntImm(DataType::Int(32), 0),
IntImm(DataType::Int(32), tir::builtin::kTVMFFIAnyTypeIndex),
IntImm(DataType::Int(32), info.type_index)}));
+ Stmt store_zero_padding =
+ tir::Evaluate(tir::Call(DataType::Int(32), tir::builtin::tvm_struct_set(),
+ {ret_var_, IntImm(DataType::Int(32), 0),
+ IntImm(DataType::Int(32), tir::builtin::kTVMFFIAnyZeroPadding),
+ IntImm(DataType::Int(32), 0)}));
Stmt store_val = tir::Evaluate(
tir::Call(DataType::Int(32), tir::builtin::tvm_struct_set(),
{ret_var_, IntImm(DataType::Int(32), 0),
IntImm(DataType::Int(32), tir::builtin::kTVMFFIAnyUnionValue), info.expr}));
Stmt ret_zero = Evaluate(tvm::ret(0));
- return SeqStmt({store_tindex, store_val, ret_zero});
+ return SeqStmt({store_tindex, store_zero_padding, store_val, ret_zero});
}
Var ret_var_;
diff --git a/web/src/ctypes.ts b/web/src/ctypes.ts
index feee56b81f..50e82e445c 100644
--- a/web/src/ctypes.ts
+++ b/web/src/ctypes.ts
@@ -72,6 +72,8 @@ export const enum TypeIndex {
kTVMFFIByteArrayPtr = 9,
/*! \brief R-value reference to ObjectRef */
kTVMFFIObjectRValueRef = 10,
+ /*! \brief Small string on stack */
+ kTVMFFISmallStr = 11,
/*! \brief Start of statically defined objects. */
kTVMFFIStaticObjectBegin = 64,
/*!
diff --git a/web/src/memory.ts b/web/src/memory.ts
index 850f3bd371..582449def5 100644
--- a/web/src/memory.ts
+++ b/web/src/memory.ts
@@ -186,11 +186,29 @@ export class Memory {
const typeKeyPtr = typeInfoPtr + 2 * SizeOf.I32;
return this.loadByteArrayAsString(typeKeyPtr);
}
+ /**
+ * Load small string from value pointer.
+ * @param ffiAnyPtr The pointer to the value.
+ * @returns The small string.
+ */
+ loadSmallStr(ffiAnyPtr: Pointer): string {
+ if (this.buffer != this.memory.buffer) {
+ this.updateViews();
+ }
+ const sizePtr = ffiAnyPtr + SizeOf.I32;
+ const length = this.loadU8(sizePtr);
+ const strPtr = ffiAnyPtr + SizeOf.I32 + SizeOf.U8;
+ const ret = [];
+ for (let i = 0; i < length; i++) {
+ ret.push(String.fromCharCode(this.viewU8[strPtr + i]));
+ }
+ return ret.join("");
+ }
/**
* Load bytearray as string from ptr.
* @param byteArrayPtr The head address of the bytearray.
*/
- loadByteArrayAsString(byteArrayPtr: Pointer): string {
+ loadByteArrayAsString(byteArrayPtr: Pointer): string {
if (this.buffer != this.memory.buffer) {
this.updateViews();
}
diff --git a/web/src/runtime.ts b/web/src/runtime.ts
index 162052d41b..423f2a070d 100644
--- a/web/src/runtime.ts
+++ b/web/src/runtime.ts
@@ -2019,6 +2019,7 @@ export class Instance implements Disposable {
const tp = typeof val;
const argOffset = packedArgs + i * SizeOf.TVMFFIAny;
const argTypeIndexOffset = argOffset;
+ const argZeroPaddingOffset = argOffset + SizeOf.I32;
const argValueOffset = argOffset + SizeOf.I32 * 2;
// Convert string[] to a TVMArray of, hence treated as a TVMObject
@@ -2028,8 +2029,9 @@ export class Instance implements Disposable {
val = this.makeTVMArray(tvmStringArray);
}
- // clear off the extra padding valuesbefore ptr storage
- stack.storeI32(argTypeIndexOffset + SizeOf.I32, 0);
+ // clear off the extra zero padding before ptr storage
+ stack.storeI32(argZeroPaddingOffset, 0);
+ // clear off the extra zero padding after ptr storage
stack.storeI32(argValueOffset + SizeOf.I32, 0);
if (val instanceof NDArray) {
if (!val.isView) {
@@ -2177,6 +2179,8 @@ export class Instance implements Disposable {
const retOffset = stack.allocRawBytes(SizeOf.TVMFFIAny);
// pre-store the result to be null
stack.storeI32(retOffset, TypeIndex.kTVMFFINone);
+ // clear off the extra zero padding before ptr storage
+ stack.storeI32(retOffset + SizeOf.I32, 0);
stack.commitToWasmMemory();
this.lib.checkCall(
(this.exports.TVMFFIFunctionCall as ctypes.FTVMFFIFunctionCall)(
@@ -2253,6 +2257,9 @@ export class Instance implements Disposable {
);
return result;
}
+ case TypeIndex.kTVMFFISmallStr: {
+ return this.memory.loadSmallStr(resultAnyPtr);
+ }
case TypeIndex.kTVMFFIStr: {
const strObjPtr = this.memory.loadPointer(valuePtr);
const result = this.memory.loadByteArrayAsString(strObjPtr + SizeOf.ObjectHeader);
diff --git a/web/tests/node/test_packed_func.js b/web/tests/node/test_packed_func.js
index e2b6c7b7c9..341110d235 100644
--- a/web/tests/node/test_packed_func.js
+++ b/web/tests/node/test_packed_func.js
@@ -46,7 +46,9 @@ test("GetGlobal", () => {
// check function argument with different types.
assert(fecho(1123) == 1123);
assert(fecho("xyz") == "xyz");
-
+ // test long string as the abi can be different from small str
+ const long_str = "1234567890123456789abcdefghijklmnopqrstuvwxyz";
+ assert(fecho(long_str) == long_str);
let bytes = new Uint8Array([1, 2, 3]);
let rbytes = fecho(bytes);
assert(rbytes.length == bytes.length);