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LibWasm: Implement the multi-memory proposal

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This commit is contained in:
Ali Mohammad Pur 2023-10-23 00:19:28 +03:30 • committed by Andreas Kling
parent f4515aae80
commit 22d411345d
5 changed files with 221 additions and 139 deletions
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97
Userland/Libraries/LibWasm/Parser/Parser.cpp
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@ -418,18 +418,28 @@ ParseResult<Vector<Instruction>> Instruction::parse(Stream& stream, InstructionP
case Instructions::i64_store8.value():
case Instructions::i64_store16.value():
case Instructions::i64_store32.value(): {
// op (align offset)
// op (align [multi-memory: memindex] offset)
auto align_or_error = stream.read_value<LEB128<size_t>>();
if (align_or_error.is_error())
return with_eof_check(stream, ParseError::InvalidInput);
size_t align = align_or_error.release_value();
// Proposal "multi-memory", if bit 6 of alignment is set, then a memory index follows the alignment.
size_t memory_index = 0;
if ((align & 0x20) != 0) {
align &= ~0x20;
auto memory_index_or_error = stream.read_value<LEB128<size_t>>();
if (memory_index_or_error.is_error())
return with_eof_check(stream, ParseError::InvalidInput);
memory_index = memory_index_or_error.release_value();
}
auto offset_or_error = stream.read_value<LEB128<size_t>>();
if (offset_or_error.is_error())
return with_eof_check(stream, ParseError::InvalidInput);
size_t offset = offset_or_error.release_value();
resulting_instructions.append(Instruction { opcode, MemoryArgument { static_cast<u32>(align), static_cast<u32>(offset) } });
resulting_instructions.append(Instruction { opcode, MemoryArgument { static_cast<u32>(align), static_cast<u32>(offset), MemoryIndex(memory_index) } });
break;
}
case Instructions::local_get.value():
@ -453,19 +463,15 @@ ParseResult<Vector<Instruction>> Instruction::parse(Stream& stream, InstructionP
}
case Instructions::memory_size.value():
case Instructions::memory_grow.value(): {
// op 0x0
// The zero is currently unused.
auto unused_or_error = stream.read_value<u8>();
if (unused_or_error.is_error())
// op [multi-memory: memindex]|0x00
auto memory_index_or_error = stream.read_value<u8>();
if (memory_index_or_error.is_error())
return with_eof_check(stream, ParseError::ExpectedKindTag);
auto unused = unused_or_error.release_value();
if (unused != 0x00) {
dbgln("Invalid tag in memory_grow {}", unused);
return with_eof_check(stream, ParseError::InvalidTag);
}
auto memory_index = memory_index_or_error.release_value();
resulting_instructions.append(Instruction { opcode });
resulting_instructions.append(Instruction { opcode, MemoryIndexArgument { MemoryIndex(memory_index) } });
break;
}
case Instructions::i32_const.value(): {
@ -704,14 +710,15 @@ ParseResult<Vector<Instruction>> Instruction::parse(Stream& stream, InstructionP
auto index = GenericIndexParser<DataIndex>::parse(stream);
if (index.is_error())
return index.error();
auto unused_or_error = stream.read_value<u8>();
if (unused_or_error.is_error())
// Proposal "multi-memory", literal 0x00 is replaced with a memory index.
auto memory_index_or_error = stream.read_value<u8>();
if (memory_index_or_error.is_error())
return with_eof_check(stream, ParseError::InvalidInput);
auto unused = unused_or_error.release_value();
if (unused != 0x00)
return ParseError::InvalidImmediate;
resulting_instructions.append(Instruction { full_opcode, index.release_value() });
auto memory_index = memory_index_or_error.release_value();
resulting_instructions.append(Instruction { full_opcode, MemoryInitArgs { index.release_value(), MemoryIndex(memory_index) } });
break;
}
case Instructions::data_drop.value(): {
@ -722,27 +729,27 @@ ParseResult<Vector<Instruction>> Instruction::parse(Stream& stream, InstructionP
break;
}
case Instructions::memory_copy.value(): {
// Proposal "multi-memory", literal 0x00 is replaced with two memory indices, destination and source, respectively.
MemoryIndex indices[] = { 0, 0 };
for (size_t i = 0; i < 2; ++i) {
auto unused_or_error = stream.read_value<u8>();
if (unused_or_error.is_error())
auto memory_index_or_error = stream.read_value<u8>();
if (memory_index_or_error.is_error())
return with_eof_check(stream, ParseError::InvalidInput);
auto unused = unused_or_error.release_value();
if (unused != 0x00)
return ParseError::InvalidImmediate;
indices[i] = memory_index_or_error.release_value();
}
resulting_instructions.append(Instruction { full_opcode });
resulting_instructions.append(Instruction { full_opcode, MemoryCopyArgs { indices[1], indices[0] } });
break;
}
case Instructions::memory_fill.value(): {
auto unused_or_error = stream.read_value<u8>();
if (unused_or_error.is_error())
// Proposal "multi-memory", literal 0x00 is replaced with a memory index.
auto memory_index_or_error = stream.read_value<u8>();
if (memory_index_or_error.is_error())
return with_eof_check(stream, ParseError::InvalidInput);
auto unused = unused_or_error.release_value();
if (unused != 0x00)
return ParseError::InvalidImmediate;
resulting_instructions.append(Instruction { full_opcode });
auto memory_index = memory_index_or_error.release_value();
resulting_instructions.append(Instruction { full_opcode, MemoryIndexArgument { MemoryIndex { memory_index } } });
break;
}
case Instructions::table_init.value(): {
@ -793,17 +800,28 @@ ParseResult<Vector<Instruction>> Instruction::parse(Stream& stream, InstructionP
case Instructions::v128_load32_splat.value():
case Instructions::v128_load64_splat.value():
case Instructions::v128_store.value(): {
// op (align offset)
// op (align [multi-memory memindex] offset)
auto align_or_error = stream.read_value<LEB128<size_t>>();
if (align_or_error.is_error())
return with_eof_check(stream, ParseError::ExpectedIndex);
size_t align = align_or_error.release_value();
// Proposal "multi-memory", if bit 6 of alignment is set, then a memory index follows the alignment.
size_t memory_index = 0;
if ((align & 0x20) != 0) {
align &= ~0x20;
auto memory_index_or_error = stream.read_value<LEB128<size_t>>();
if (memory_index_or_error.is_error())
return with_eof_check(stream, ParseError::InvalidInput);
memory_index = memory_index_or_error.release_value();
}
auto offset_or_error = stream.read_value<LEB128<size_t>>();
if (offset_or_error.is_error())
return with_eof_check(stream, ParseError::ExpectedIndex);
size_t offset = offset_or_error.release_value();
resulting_instructions.append(Instruction { full_opcode, MemoryArgument { static_cast<u32>(align), static_cast<u32>(offset) } });
resulting_instructions.append(Instruction { full_opcode, MemoryArgument { static_cast<u32>(align), static_cast<u32>(offset), MemoryIndex(memory_index) } });
break;
}
case Instructions::v128_load8_lane.value():
@ -814,11 +832,22 @@ ParseResult<Vector<Instruction>> Instruction::parse(Stream& stream, InstructionP
case Instructions::v128_store16_lane.value():
case Instructions::v128_store32_lane.value():
case Instructions::v128_store64_lane.value(): {
// op (align offset) (index)
// op (align [multi-memory: memindex] offset) (index)
auto align_or_error = stream.read_value<LEB128<size_t>>();
if (align_or_error.is_error())
return with_eof_check(stream, ParseError::ExpectedIndex);
size_t align = align_or_error.release_value();
// Proposal "multi-memory", if bit 6 of alignment is set, then a memory index follows the alignment.
size_t memory_index = 0;
if ((align & 0x20) != 0) {
align &= ~0x20;
auto memory_index_or_error = stream.read_value<LEB128<size_t>>();
if (memory_index_or_error.is_error())
return with_eof_check(stream, ParseError::InvalidInput);
memory_index = memory_index_or_error.release_value();
}
auto offset_or_error = stream.read_value<LEB128<size_t>>();
if (offset_or_error.is_error())
return with_eof_check(stream, ParseError::ExpectedIndex);
@ -829,7 +858,7 @@ ParseResult<Vector<Instruction>> Instruction::parse(Stream& stream, InstructionP
return with_eof_check(stream, ParseError::InvalidInput);
auto index = index_or_error.release_value();
resulting_instructions.append(Instruction { full_opcode, MemoryAndLaneArgument { { static_cast<u32>(align), static_cast<u32>(offset) }, index } });
resulting_instructions.append(Instruction { full_opcode, MemoryAndLaneArgument { { static_cast<u32>(align), static_cast<u32>(offset), MemoryIndex(memory_index) }, index } });
break;
}
case Instructions::v128_const.value(): {