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HPCC-29914 Add embedded wasm support
Fixed Cx20 compile issues Removed securEnclave.so (no longer needed) Removed "callbacks" (no longer needed) Various fixes per review comments Signed-off-by: Gordon Smith <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,268 @@ | ||
| /* | ||
| See: https://github.com/WebAssembly/component-model/blob/main/design/mvp/CanonicalABI.md | ||
| https://github.com/WebAssembly/component-model/blob/main/design/mvp/canonical-abi/definitions.py | ||
| */ | ||
|
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| #include "abi.hpp" | ||
| #include "jexcept.hpp" | ||
|
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| #include <cmath> | ||
| #include <fstream> | ||
| #include <iostream> | ||
| #include <sstream> | ||
| #include <vector> | ||
|
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| auto UTF16_TAG = 1 << 31; | ||
|
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| // | ||
| /* canonical despecialize (python) ------------------------------------------------------------- | ||
| def despecialize(t): | ||
| match t: | ||
| case Tuple(ts) : return Record([ Field(str(i), t) for i,t in enumerate(ts) ]) | ||
| case Union(ts) : return Variant([ Case(str(i), t) for i,t in enumerate(ts) ]) | ||
| case Enum(labels) : return Variant([ Case(l, None) for l in labels ]) | ||
| case Option(t) : return Variant([ Case("none", None), Case("some", t) ]) | ||
| case Result(ok, error) : return Variant([ Case("ok", ok), Case("error", error) ]) | ||
| case _ : return t | ||
| */ | ||
|
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| // template <typename T> | ||
| // wasmtime::ValType despecialize(const T<wasmtime::Val> &t) | ||
| // { | ||
| // switch (t.kind()) | ||
| // { | ||
| // case wasmtime::ValKind::I32: | ||
| // case wasmtime::ValKind::I64: | ||
| // case wasmtime::ValKind::F32: | ||
| // case wasmtime::ValKind::F64: | ||
| // case wasmtime::ValKind::V128: | ||
| // return t.kind(); | ||
| // default: | ||
| // return wasmtime::ValType::i32(); | ||
| // } | ||
| // } | ||
|
|
||
| /* canonical alignment (python) ------------------------------------------------------------- | ||
| def alignment(t): | ||
| match despecialize(t): | ||
| case Bool() : return 1 | ||
| case S8() | U8() : return 1 | ||
| case S16() | U16() : return 2 | ||
| case S32() | U32() : return 4 | ||
| case S64() | U64() : return 8 | ||
| case Float32() : return 4 | ||
| case Float64() : return 8 | ||
| case Char() : return 4 | ||
| case String() | List(_) : return 4 | ||
| case Record(fields) : return alignment_record(fields) | ||
| case Variant(cases) : return alignment_variant(cases) | ||
| case Flags(labels) : return alignment_flags(labels) | ||
| case Own(_) | Borrow(_) : return 4 | ||
| */ | ||
|
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||
| // int alignment(const wasmtime::ValType &t) | ||
| // { | ||
| // switch (t.kind()) | ||
| // { | ||
| // case wasmtime::ValKind::I32: | ||
| // case wasmtime::ValKind::F32: | ||
| // return 4; | ||
| // case wasmtime::ValKind::I64: | ||
| // case wasmtime::ValKind::F64: | ||
| // return 8; | ||
| // case wasmtime::ValKind::V128: | ||
| // return 16; | ||
| // default: | ||
| // return 1; | ||
| // } | ||
| // } | ||
|
|
||
| /* canonical align_to (python) ------------------------------------------------------------- | ||
| def align_to(ptr, alignment): | ||
| return math.ceil(ptr / alignment) * alignment | ||
| */ | ||
|
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| uint32_t align_to(uint32_t ptr, uint32_t alignment) | ||
| { | ||
| return std::ceil(ptr / alignment) * alignment; | ||
| } | ||
|
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| // loading --- | ||
|
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| /* canonical load_int (python) ------------------------------------------------------------- | ||
| def load_int(cx, ptr, nbytes, signed = False): | ||
| return int.from_bytes(cx.opts.memory[ptr : ptr+nbytes], 'little', signed=signed) | ||
| */ | ||
|
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| #include <stdio.h> | ||
| #include <stdint.h> | ||
|
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| // int load_int(const wasmtime::Span<uint8_t> &cx, int32_t *ptr, int nbytes, int signed) | ||
| // { | ||
| // int result = 0; | ||
| // for (int i = 0; i < nbytes; i++) { | ||
| // result += ptr[i] << (8*i); | ||
| // } | ||
| // if (signed) { | ||
| // result += (ptr[nbytes-1] & 0x80) ? -1 << (8*nbytes) : 0; | ||
| // } | ||
| // return result; | ||
| // } | ||
|
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| template <typename T> | ||
| T load_int(const wasmtime::Span<uint8_t> &data, int32_t ptr) | ||
| { | ||
| T retVal = 0; | ||
| auto nbytes = sizeof(retVal); | ||
| for (int i = 0; i < nbytes; ++i) | ||
| { | ||
| uint8_t b = data[ptr + i]; | ||
| retVal += b << (i * 8); | ||
| } | ||
| if (std::is_signed<T>::value) | ||
| { | ||
| retVal += (data[ptr + nbytes - 1] & 0x80) ? -1 << (8 * nbytes) : 0; | ||
| } | ||
| return retVal; | ||
| } | ||
|
|
||
| /* canonical load_string_from_range (python) ------------------------------------------------------------- | ||
| def load_string_from_range(cx, ptr, tagged_code_units): | ||
| match cx.opts.string_encoding: | ||
| case 'utf8': | ||
| alignment = 1 | ||
| byte_length = tagged_code_units | ||
| encoding = 'utf-8' | ||
| case 'utf16': | ||
| alignment = 2 | ||
| byte_length = 2 * tagged_code_units | ||
| encoding = 'utf-16-le' | ||
| case 'latin1+utf16': | ||
| alignment = 2 | ||
| if bool(tagged_code_units & UTF16_TAG): | ||
| byte_length = 2 * (tagged_code_units ^ UTF16_TAG) | ||
| encoding = 'utf-16-le' | ||
| else: | ||
| byte_length = tagged_code_units | ||
| encoding = 'latin-1' | ||
| trap_if(ptr != align_to(ptr, alignment)) | ||
| trap_if(ptr + byte_length > len(cx.opts.memory)) | ||
| try: | ||
| s = cx.opts.memory[ptr : ptr+byte_length].decode(encoding) | ||
| except UnicodeError: | ||
| trap() | ||
| return (s, cx.opts.string_encoding, tagged_code_units) | ||
| */ | ||
|
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| // More: Not currently available from the wasmtime::context object, see https://github.com/bytecodealliance/wasmtime/issues/6719 | ||
| std::string global_encoding = "utf8"; | ||
|
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| std::pair<uint32_t /*ptr*/, uint32_t /*byte length*/> load_string_from_range(const wasmtime::Span<uint8_t> &data, uint32_t ptr, uint32_t tagged_code_units) | ||
| { | ||
| std::string encoding = "utf-8"; | ||
| uint32_t byte_length = tagged_code_units; | ||
| uint32_t alignment = 1; | ||
| if (global_encoding.compare("utf8") == 0) | ||
| { | ||
| alignment = 1; | ||
| byte_length = tagged_code_units; | ||
| encoding = "utf-8"; | ||
| } | ||
| else if (global_encoding.compare("utf16") == 0) | ||
| { | ||
| alignment = 2; | ||
| byte_length = 2 * tagged_code_units; | ||
| encoding = "utf-16-le"; | ||
| } | ||
| else if (global_encoding.compare("latin1+utf16") == 0) | ||
| { | ||
| alignment = 2; | ||
| if (tagged_code_units & UTF16_TAG) | ||
| { | ||
| byte_length = 2 * (tagged_code_units ^ UTF16_TAG); | ||
| encoding = "utf-16-le"; | ||
| } | ||
| else | ||
| { | ||
| byte_length = tagged_code_units; | ||
| encoding = "latin-1"; | ||
| } | ||
| } | ||
|
|
||
| if (ptr != align_to(ptr, alignment)) | ||
| { | ||
| throw makeStringException(3, "Invalid alignment"); | ||
| } | ||
|
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||
| if (ptr + byte_length > data.size()) | ||
| { | ||
| throw makeStringException(1, "Out of bounds"); | ||
| } | ||
|
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||
| return std::make_pair(ptr, byte_length); | ||
| } | ||
|
|
||
| /* canonical load_string (python) ------------------------------------------------------------- | ||
| def load_string(cx, ptr): | ||
| begin = load_int(cx, ptr, 4) | ||
| tagged_code_units = load_int(cx, ptr + 4, 4) | ||
| return load_string_from_range(cx, begin, tagged_code_units) | ||
| */ | ||
| std::pair<uint32_t /*ptr*/, uint32_t /*byte length*/> load_string(const wasmtime::Span<uint8_t> &data, uint32_t ptr) | ||
| { | ||
| uint32_t begin = load_int<uint32_t>(data, ptr); | ||
| uint32_t tagged_code_units = load_int<uint32_t>(data, ptr + 4); | ||
| return load_string_from_range(data, begin, tagged_code_units); | ||
| } | ||
|
|
||
| /* canonical load_list_from_range (python) ------------------------------------------------------------- | ||
| def load_list_from_range(cx, ptr, length, elem_type): | ||
| trap_if(ptr != align_to(ptr, alignment(elem_type))) | ||
| trap_if(ptr + length * size(elem_type) > len(cx.opts.memory)) | ||
| a = [] | ||
| for i in range(length): | ||
| a.append(load(cx, ptr + i * size(elem_type), elem_type)) | ||
| return a | ||
| */ | ||
|
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| template <typename T> | ||
| std::vector<T> load_list_from_range(const wasmtime::Span<uint8_t> &data, uint32_t ptr, uint32_t length) | ||
| { | ||
| if (ptr != align_to(ptr, alignment(T{}))) | ||
| throw makeStringException(2, "Pointer is not aligned"); | ||
| if (ptr + length * sizeof(T) > data.size()) | ||
| throw makeStringException(1, "Out of bounds access"); | ||
| std::vector<T> a; | ||
| for (uint32_t i = 0; i < length; i++) | ||
| { | ||
| a.push_back(load<T>(data, ptr + i * sizeof(T))); | ||
| } | ||
| return a; | ||
| } | ||
|
|
||
| /* canonical load_list (python) ------------------------------------------------------------- | ||
| def load_list(cx, ptr, elem_type): | ||
| begin = load_int(cx, ptr, 4) | ||
| length = load_int(cx, ptr + 4, 4) | ||
| return load_list_from_range(cx, begin, length, elem_type) | ||
| */ | ||
|
|
||
| // Storing --- |
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