/src/WasmEdge/lib/loader/ast/segment.cpp

Source (jump to first uncovered line)
// SPDX-License-Identifier: Apache-2.0
// SPDX-FileCopyrightText: 2019-2024 Second State INC

#include "loader/loader.h"

namespace WasmEdge {
namespace Loader {

// Load binary of TableSegment node. See "include/loader/loader.h".
Expect<void> Loader::loadSegment(AST::TableSegment &TabSeg) {
  // Check the first byte is the reftype in table type or not.
  EXPECTED_TRY(uint8_t CheckByte, FMgr.peekByte().map_error([this](auto E) {
    return logLoadError(E, FMgr.getLastOffset(), ASTNodeAttr::Seg_Table);
  }));

  if (CheckByte == 0x40U) {
    // Table segment case is for FunctionReferences proposal.
    if (!Conf.hasProposal(Proposal::FunctionReferences)) {
      return logNeedProposal(ErrCode::Value::MalformedTable,
                             Proposal::FunctionReferences, FMgr.getLastOffset(),
                             ASTNodeAttr::Seg_Table);
    }
    FMgr.readByte();

    // Check the second byte.
    EXPECTED_TRY(uint8_t B, FMgr.readByte().map_error([this](auto E) {
      return logLoadError(E, FMgr.getLastOffset(), ASTNodeAttr::Seg_Table);
    }));
    if (B != 0x00U) {
      return logLoadError(ErrCode::Value::MalformedTable, FMgr.getLastOffset(),
                          ASTNodeAttr::Seg_Table);
    }

    // Read the table type.
    EXPECTED_TRY(loadType(TabSeg.getTableType()).map_error([](auto E) {
      spdlog::error(ErrInfo::InfoAST(ASTNodeAttr::Seg_Table));
      return E;
    }));

    // Read the expression.
    EXPECTED_TRY(loadExpression(TabSeg.getExpr()).map_error([](auto E) {
      spdlog::error(ErrInfo::InfoAST(ASTNodeAttr::Seg_Table));
      return E;
    }));
  } else {
    // The table type case.
    EXPECTED_TRY(loadType(TabSeg.getTableType()).map_error([](auto E) {
      spdlog::error(ErrInfo::InfoAST(ASTNodeAttr::Seg_Table));
      return E;
    }));
  }

  return {};
}

// Load binary of GlobalSegment node. See "include/loader/loader.h".
Expect<void> Loader::loadSegment(AST::GlobalSegment &GlobSeg) {
  return Expect<void>{}
      .and_then([this, &GlobSeg]() {
        // Read global type node.
        return loadType(GlobSeg.getGlobalType());
      })
      .and_then([this, &GlobSeg]() {
        // Read the expression.
        return loadExpression(GlobSeg.getExpr());
      })
      .map_error([](auto E) {
        spdlog::error(ErrInfo::InfoAST(ASTNodeAttr::Seg_Global));
        return E;
      });
}

// Load binary of ElementSegment node. See "include/loader/loader.h".
Expect<void> Loader::loadSegment(AST::ElementSegment &ElemSeg) {
  auto ReportError = [this](auto E) {
    return logLoadError(E, FMgr.getLastOffset(), ASTNodeAttr::Seg_Element);
  };

  // Element segment binary format:
  // ---------------------------------------------------------------------------
  //  Mode | TableIdx | OffExpr | ElemKind | RefType | vec(FuncIdx) | vec(expr)
  // ------|----------|---------|----------|---------|--------------|-----------
  //    0  |          |    v    |          |         |       v      |
  //    1  |          |         |    v     |         |       v      |
  //    2  |    v     |    v    |    v     |         |       v      |
  //    3  |          |         |    v     |         |       v      |
  //    4  |          |    v    |          |         |              |     v
  //    5  |          |         |          |    v    |              |     v
  //    6  |    v     |    v    |          |    v    |              |     v
  //    7  |          |         |          |    v    |              |     v
  // ---------------------------------------------------------------------------
  // Mode: element initial integer, u32
  // TableIdx: target table index, u32
  // OffExpr: init offset expression, expr
  // ElemKind: byte 0x00, ref.func
  // RefType: reference type, RefType
  // vec(FuncIdx): function index vector, vec(u32)
  // vec(expr): reference init list, vec(expr)

  // Read the checking byte.
  uint32_t Check = 0;
  if (unlikely(!Conf.hasProposal(Proposal::BulkMemoryOperations) &&
               !Conf.hasProposal(Proposal::ReferenceTypes))) {
    // Legacy for BulkMemoryOperations and ReferenceTypes proposals turned off.
    // Element segment binary format: TableIdx + OffExpr + vec(FuncIdx)
    EXPECTED_TRY(FMgr.readU32().map_error(ReportError).map([&](auto Idx) {
      ElemSeg.setIdx(Idx);
    }));
  } else {
    EXPECTED_TRY(Check, FMgr.readU32().map_error(ReportError));
  }

  // Check the prefix byte.
  switch (Check) {
  case 0x00:
  case 0x02:
  case 0x04:
  case 0x06:
    ElemSeg.setMode(AST::ElementSegment::ElemMode::Active);
    break;

  case 0x01:
  case 0x05:
    ElemSeg.setMode(AST::ElementSegment::ElemMode::Passive);
    break;

  case 0x03:
  case 0x07:
    ElemSeg.setMode(AST::ElementSegment::ElemMode::Declarative);
    break;

  default:
    // TODO: Correctness the error code once there's spec test.
    return logLoadError(ErrCode::Value::IllegalGrammar, FMgr.getLastOffset(),
                        ASTNodeAttr::Seg_Element);
  }

  // Read the table index.
  ElemSeg.setIdx(0);
  switch (Check) {
  case 0x02:
  case 0x06:
    EXPECTED_TRY(FMgr.readU32().map_error(ReportError).map([&](auto Idx) {
      ElemSeg.setIdx(Idx);
    }));
    break;

  default:
    break;
  }

  // Read the expression.
  switch (Check) {
  case 0x00:
  case 0x02:
  case 0x04:
  case 0x06:
    EXPECTED_TRY(loadExpression(ElemSeg.getExpr()).map_error([](auto E) {
      spdlog::error(ErrInfo::InfoAST(ASTNodeAttr::Seg_Element));
      return E;
    }));
    break;

  default:
    break;
  }

  // Read element kind and init function indices.
  switch (Check) {
  case 0x01:
  case 0x02:
  case 0x03:
    EXPECTED_TRY(FMgr.readByte()
                     .and_then([&](auto B) -> Expect<void> {
                       if (B != 0x00U) {
                         return Unexpect(ErrCode::Value::ExpectedZeroByte);
                       };
                       return {};
                     })
                     .map_error(ReportError));
    [[fallthrough]];

  case 0x00: {
    EXPECTED_TRY(uint32_t VecCnt, loadVecCnt().map_error(ReportError));
    for (uint32_t I = 0; I < VecCnt; ++I) {
      // For each element in vec(funcidx), make expr(ref.func idx end).
      ElemSeg.getInitExprs().emplace_back();
      AST::Instruction RefFunc(OpCode::Ref__func);
      AST::Instruction End(OpCode::End);
      EXPECTED_TRY(loadInstruction(RefFunc).map_error([](auto E) {
        spdlog::error(ErrInfo::InfoAST(ASTNodeAttr::Seg_Element));
        return E;
      }));
      ElemSeg.getInitExprs().back().getInstrs().emplace_back(
          std::move(RefFunc));
      ElemSeg.getInitExprs().back().getInstrs().emplace_back(std::move(End));
    }
    break;
  }
  default:
    break;
  }

  // Set the default reference type.
  if (Check == 0x04) {
    ElemSeg.setRefType(TypeCode::FuncRef);
  } else {
    ElemSeg.setRefType(ValType(TypeCode::Ref, TypeCode::FuncRef));
  }

  // Read the reference type and init expressions.
  switch (Check) {
  case 0x05:
  case 0x06:
  case 0x07: {
    // The AST node information is handled.
    EXPECTED_TRY(auto Type, loadRefType(ASTNodeAttr::Seg_Element));
    ElemSeg.setRefType(Type);
    [[fallthrough]];
  }
  case 0x04: {
    return loadVec<AST::ElementSegment>(
        ElemSeg.getInitExprs(), [this](AST::Expression &Expr) -> Expect<void> {
          return loadExpression(Expr);
        });
  }

  default:
    break;
  }

  return {};
}

// Load binary of CodeSegment node. See "include/loader/loader.h".
Expect<void> Loader::loadSegment(AST::CodeSegment &CodeSeg) {
  auto ReportError = [this](auto E) {
    return logLoadError(E, FMgr.getLastOffset(), ASTNodeAttr::Seg_Code);
  };

  // Read the code segment size.
  EXPECTED_TRY(FMgr.readU32().map_error(ReportError).map([&](auto S) {
    CodeSeg.setSegSize(S);
  }));
  auto ExprSizeBound = FMgr.getOffset() + CodeSeg.getSegSize();

  // Read the vector of local variable counts and types.
  EXPECTED_TRY(uint32_t VecCnt, loadVecCnt().map_error(ReportError));
  CodeSeg.getLocals().clear();
  CodeSeg.getLocals().reserve(VecCnt);
  uint32_t TotalLocalCnt = 0;
  for (uint32_t I = 0; I < VecCnt; ++I) {
    EXPECTED_TRY(uint32_t LocalCnt, FMgr.readU32().map_error(ReportError));
    // Total local variables should not more than 2^32. Capped at 2^26.
    if (UINT32_C(67108864) - TotalLocalCnt < LocalCnt) {
      return logLoadError(ErrCode::Value::TooManyLocals, FMgr.getLastOffset(),
                          ASTNodeAttr::Seg_Code);
    }
    TotalLocalCnt += LocalCnt;
    // Read the value type.
    // The AST node information is handled.
    EXPECTED_TRY(ValType LocalType, loadValType(ASTNodeAttr::Seg_Code));
    CodeSeg.getLocals().push_back(std::make_pair(LocalCnt, LocalType));
  }

  if (!Conf.getRuntimeConfigure().isForceInterpreter() &&
      WASMType != InputType::WASM) {
    // For the AOT mode and not force interpreter in configure, skip the
    // function body.
    FMgr.seek(ExprSizeBound);
  } else {
    // Read function body with expected expression size.
    EXPECTED_TRY(
        loadExpression(CodeSeg.getExpr(), ExprSizeBound).map_error([](auto E) {
          spdlog::error(ErrInfo::InfoAST(ASTNodeAttr::Seg_Code));
          return E;
        }));
  }

  return {};
}

// Load binary of DataSegment node. See "include/loader/loader.h".
Expect<void> Loader::loadSegment(AST::DataSegment &DataSeg) {
  auto ReportError = [this](auto E) {
    return logLoadError(E, FMgr.getLastOffset(), ASTNodeAttr::Seg_Data);
  };
  DataSeg.setMode(AST::DataSegment::DataMode::Passive);
  DataSeg.setIdx(0);

  // Data segment binary format:
  // ----------------------------------------
  //  Mode | MemoryIdx | OffExpr | vec(byte)
  // ------|-----------|---------|-----------
  //    0  |           |    v    |     v
  //    1  |           |         |     v
  //    2  |     v     |    v    |     v
  // ----------------------------------------
  // Mode: data initial integer, u32
  // MemoryIdx: target memory index, u32
  // OffExpr: init offset expression, expr
  // vec(byte): init data, vec(u8)

  // Read the checking byte.
  EXPECTED_TRY(uint32_t Check, FMgr.readU32().map_error(ReportError));
  // Check > 0 cases are for BulkMemoryOperations or ReferenceTypes proposal.
  if (Check > 0 && !Conf.hasProposal(Proposal::BulkMemoryOperations) &&
      !Conf.hasProposal(Proposal::ReferenceTypes)) {
    return logNeedProposal(ErrCode::Value::ExpectedZeroByte,
                           Proposal::BulkMemoryOperations, FMgr.getLastOffset(),
                           ASTNodeAttr::Seg_Data);
  }

  switch (Check) {
  case 0x02: // 0x02 memidx expr vec(byte) , Active
    // Read target memory index.
    EXPECTED_TRY(FMgr.readU32().map_error(ReportError).map([&](auto Idx) {
      DataSeg.setIdx(Idx);
    }));
    [[fallthrough]];

  case 0x00: // 0x00 expr vec(byte) , Active
    // Read the offset expression.
    EXPECTED_TRY(loadExpression(DataSeg.getExpr()).map_error([](auto E) {
      spdlog::error(ErrInfo::InfoAST(ASTNodeAttr::Seg_Data));
      return E;
    }));
    DataSeg.setMode(AST::DataSegment::DataMode::Active);
    [[fallthrough]];

  case 0x01: // 0x01 vec(byte) , Passive
  {
    // Read initialization data.
    EXPECTED_TRY(uint32_t VecCnt, loadVecCnt().map_error(ReportError));
    EXPECTED_TRY(FMgr.readBytes(VecCnt).map_error(ReportError).map([&](auto V) {
      DataSeg.getData() = std::move(V);
    }));
    break;
  }
  default:
    // TODO: Correctness the error code once there's spec test.
    return logLoadError(ErrCode::Value::IllegalGrammar, FMgr.getLastOffset(),
                        ASTNodeAttr::Seg_Data);
  }
  return {};
}

} // namespace Loader
} // namespace WasmEdge

Coverage Report

Created: 2025-07-18 06:13

Line	Count	Source (jump to first uncovered line)
1		// SPDX-License-Identifier: Apache-2.0
2		// SPDX-FileCopyrightText: 2019-2024 Second State INC
3
4		#include "loader/loader.h"
5
6		namespace WasmEdge {
7		namespace Loader {
8
9		// Load binary of TableSegment node. See "include/loader/loader.h".
10	501	Expect<void> Loader::loadSegment(AST::TableSegment &TabSeg) {
11		// Check the first byte is the reftype in table type or not.
12	501	EXPECTED_TRY(uint8_t CheckByte, FMgr.peekByte().map_error([this](auto E) {
13	494	return logLoadError(E, FMgr.getLastOffset(), ASTNodeAttr::Seg_Table);
14	494	}));
15
16	494	if (CheckByte == 0x40U) {
17		// Table segment case is for FunctionReferences proposal.
18	1	if (!Conf.hasProposal(Proposal::FunctionReferences)) {
19	1	return logNeedProposal(ErrCode::Value::MalformedTable,
20	1	Proposal::FunctionReferences, FMgr.getLastOffset(),
21	1	ASTNodeAttr::Seg_Table);
22	1	}
23	0	FMgr.readByte();
24
25		// Check the second byte.
26	0	EXPECTED_TRY(uint8_t B, FMgr.readByte().map_error([this](auto E) {
27	0	return logLoadError(E, FMgr.getLastOffset(), ASTNodeAttr::Seg_Table);
28	0	}));
29	0	if (B != 0x00U) {
30	0	return logLoadError(ErrCode::Value::MalformedTable, FMgr.getLastOffset(),
31	0	ASTNodeAttr::Seg_Table);
32	0	}
33
34		// Read the table type.
35	0	EXPECTED_TRY(loadType(TabSeg.getTableType()).map_error([](auto E) {
36	0	spdlog::error(ErrInfo::InfoAST(ASTNodeAttr::Seg_Table));
37	0	return E;
38	0	}));
39
40		// Read the expression.
41	0	EXPECTED_TRY(loadExpression(TabSeg.getExpr()).map_error([](auto E) {
42	0	spdlog::error(ErrInfo::InfoAST(ASTNodeAttr::Seg_Table));
43	0	return E;
44	0	}));
45	493	} else {
46		// The table type case.
47	493	EXPECTED_TRY(loadType(TabSeg.getTableType()).map_error([](auto E) {
48	493	spdlog::error(ErrInfo::InfoAST(ASTNodeAttr::Seg_Table));
49	493	return E;
50	493	}));
51	493	}
52
53	458	return {};
54	494	}
55
56		// Load binary of GlobalSegment node. See "include/loader/loader.h".
57	738	Expect<void> Loader::loadSegment(AST::GlobalSegment &GlobSeg) {
58	738	return Expect<void>{}
59	738	.and_then([this, &GlobSeg]() {
60		// Read global type node.
61	738	return loadType(GlobSeg.getGlobalType());
62	738	})
63	738	.and_then([this, &GlobSeg]() {
64		// Read the expression.
65	710	return loadExpression(GlobSeg.getExpr());
66	710	})
67	738	.map_error([](auto E) {
68	280	spdlog::error(ErrInfo::InfoAST(ASTNodeAttr::Seg_Global));
69	280	return E;
70	280	});
71	738	}
72
73		// Load binary of ElementSegment node. See "include/loader/loader.h".
74	5.73k	Expect<void> Loader::loadSegment(AST::ElementSegment &ElemSeg) {
75	5.73k	auto ReportError = [this](auto E) {
76	70	return logLoadError(E, FMgr.getLastOffset(), ASTNodeAttr::Seg_Element);
77	70	};
78
79		// Element segment binary format:
80		// ---------------------------------------------------------------------------
81		// Mode \| TableIdx \| OffExpr \| ElemKind \| RefType \| vec(FuncIdx) \| vec(expr)
82		// ------\|----------\|---------\|----------\|---------\|--------------\|-----------
83		// 0 \| \| v \| \| \| v \|
84		// 1 \| \| \| v \| \| v \|
85		// 2 \| v \| v \| v \| \| v \|
86		// 3 \| \| \| v \| \| v \|
87		// 4 \| \| v \| \| \| \| v
88		// 5 \| \| \| \| v \| \| v
89		// 6 \| v \| v \| \| v \| \| v
90		// 7 \| \| \| \| v \| \| v
91		// ---------------------------------------------------------------------------
92		// Mode: element initial integer, u32
93		// TableIdx: target table index, u32
94		// OffExpr: init offset expression, expr
95		// ElemKind: byte 0x00, ref.func
96		// RefType: reference type, RefType
97		// vec(FuncIdx): function index vector, vec(u32)
98		// vec(expr): reference init list, vec(expr)
99
100		// Read the checking byte.
101	5.73k	uint32_t Check = 0;
102	5.73k	if (unlikely(!Conf.hasProposal(Proposal::BulkMemoryOperations) &&
103	5.73k	!Conf.hasProposal(Proposal::ReferenceTypes))) {
104		// Legacy for BulkMemoryOperations and ReferenceTypes proposals turned off.
105		// Element segment binary format: TableIdx + OffExpr + vec(FuncIdx)
106	0	EXPECTED_TRY(FMgr.readU32().map_error(ReportError).map([&](auto Idx) {
107	0	ElemSeg.setIdx(Idx);
108	0	}));
109	5.73k	} else {
110	5.73k	EXPECTED_TRY(Check, FMgr.readU32().map_error(ReportError));
111	5.72k	}
112
113		// Check the prefix byte.
114	5.72k	switch (Check) {
115	2.39k	case 0x00:
116	3.35k	case 0x02:
117	4.39k	case 0x04:
118	4.54k	case 0x06:
119	4.54k	ElemSeg.setMode(AST::ElementSegment::ElemMode::Active);
120	4.54k	break;
121
122	760	case 0x01:
123	834	case 0x05:
124	834	ElemSeg.setMode(AST::ElementSegment::ElemMode::Passive);
125	834	break;
126
127	201	case 0x03:
128	307	case 0x07:
129	307	ElemSeg.setMode(AST::ElementSegment::ElemMode::Declarative);
130	307	break;
131
132	40	default:
133		// TODO: Correctness the error code once there's spec test.
134	40	return logLoadError(ErrCode::Value::IllegalGrammar, FMgr.getLastOffset(),
135	40	ASTNodeAttr::Seg_Element);
136	5.72k	}
137
138		// Read the table index.
139	5.68k	ElemSeg.setIdx(0);
140	5.68k	switch (Check) {
141	955	case 0x02:
142	1.10k	case 0x06:
143	1.10k	EXPECTED_TRY(FMgr.readU32().map_error(ReportError).map([&](auto Idx) {
144	1.09k	ElemSeg.setIdx(Idx);
145	1.09k	}));
146	1.09k	break;
147
148	4.57k	default:
149	4.57k	break;
150	5.68k	}
151
152		// Read the expression.
153	5.67k	switch (Check) {
154	2.39k	case 0x00:
155	3.35k	case 0x02:
156	4.39k	case 0x04:
157	4.53k	case 0x06:
158	4.53k	EXPECTED_TRY(loadExpression(ElemSeg.getExpr()).map_error([](auto E) {
159	3.70k	spdlog::error(ErrInfo::InfoAST(ASTNodeAttr::Seg_Element));
160	3.70k	return E;
161	3.70k	}));
162	3.70k	break;
163
164	3.70k	default:
165	1.14k	break;
166	5.67k	}
167
168		// Read element kind and init function indices.
169	4.84k	switch (Check) {
170	760	case 0x01:
171	1.69k	case 0x02:
172	1.89k	case 0x03:
173	1.89k	EXPECTED_TRY(FMgr.readByte()
174	1.88k	.and_then([&](auto B) -> Expect<void> {
175	1.88k	if (B != 0x00U) {
176	1.88k	return Unexpect(ErrCode::Value::ExpectedZeroByte);
177	1.88k	};
178	1.88k	return {};
179	1.88k	})
180	1.88k	.map_error(ReportError));
181	1.88k	[[fallthrough]];
182
183	3.71k	case 0x00: {
184	3.71k	EXPECTED_TRY(uint32_t VecCnt, loadVecCnt().map_error(ReportError));
185	14.8k	for (uint32_t I = 0; I < VecCnt; ++I) {
186		// For each element in vec(funcidx), make expr(ref.func idx end).
187	11.1k	ElemSeg.getInitExprs().emplace_back();
188	11.1k	AST::Instruction RefFunc(OpCode::Ref__func);
189	11.1k	AST::Instruction End(OpCode::End);
190	11.1k	EXPECTED_TRY(loadInstruction(RefFunc).map_error([](auto E) {
191	11.1k	spdlog::error(ErrInfo::InfoAST(ASTNodeAttr::Seg_Element));
192	11.1k	return E;
193	11.1k	}));
194	11.1k	ElemSeg.getInitExprs().back().getInstrs().emplace_back(
195	11.1k	std::move(RefFunc));
196	11.1k	ElemSeg.getInitExprs().back().getInstrs().emplace_back(std::move(End));
197	11.1k	}
198	3.65k	break;
199	3.66k	}
200	3.65k	default:
201	1.11k	break;
202	4.84k	}
203
204		// Set the default reference type.
205	4.77k	if (Check == 0x04) {
206	828	ElemSeg.setRefType(TypeCode::FuncRef);
207	3.94k	} else {
208	3.94k	ElemSeg.setRefType(ValType(TypeCode::Ref, TypeCode::FuncRef));
209	3.94k	}
210
211		// Read the reference type and init expressions.
212	4.77k	switch (Check) {
213	74	case 0x05:
214	184	case 0x06:
215	290	case 0x07: {
216		// The AST node information is handled.
217	290	EXPECTED_TRY(auto Type, loadRefType(ASTNodeAttr::Seg_Element));
218	283	ElemSeg.setRefType(Type);
219	283	[[fallthrough]];
220	283	}
221	1.11k	case 0x04: {
222	1.11k	return loadVec<AST::ElementSegment>(
223	2.99k	ElemSeg.getInitExprs(), [this](AST::Expression &Expr) -> Expect<void> {
224	2.99k	return loadExpression(Expr);
225	2.99k	});
226	283	}
227
228	3.65k	default:
229	3.65k	break;
230	4.77k	}
231
232	3.65k	return {};
233	4.77k	}
234
235		// Load binary of CodeSegment node. See "include/loader/loader.h".
236	17.5k	Expect<void> Loader::loadSegment(AST::CodeSegment &CodeSeg) {
237	17.5k	auto ReportError = [this](auto E) {
238	26	return logLoadError(E, FMgr.getLastOffset(), ASTNodeAttr::Seg_Code);
239	26	};
240
241		// Read the code segment size.
242	17.5k	EXPECTED_TRY(FMgr.readU32().map_error(ReportError).map([&](auto S) {
243	17.5k	CodeSeg.setSegSize(S);
244	17.5k	}));
245	17.5k	auto ExprSizeBound = FMgr.getOffset() + CodeSeg.getSegSize();
246
247		// Read the vector of local variable counts and types.
248	17.5k	EXPECTED_TRY(uint32_t VecCnt, loadVecCnt().map_error(ReportError));
249	17.5k	CodeSeg.getLocals().clear();
250	17.5k	CodeSeg.getLocals().reserve(VecCnt);
251	17.5k	uint32_t TotalLocalCnt = 0;
252	19.9k	for (uint32_t I = 0; I < VecCnt; ++I) {
253	2.39k	EXPECTED_TRY(uint32_t LocalCnt, FMgr.readU32().map_error(ReportError));
254		// Total local variables should not more than 2^32. Capped at 2^26.
255	2.39k	if (UINT32_C(67108864) - TotalLocalCnt < LocalCnt) {
256	7	return logLoadError(ErrCode::Value::TooManyLocals, FMgr.getLastOffset(),
257	7	ASTNodeAttr::Seg_Code);
258	7	}
259	2.38k	TotalLocalCnt += LocalCnt;
260		// Read the value type.
261		// The AST node information is handled.
262	2.38k	EXPECTED_TRY(ValType LocalType, loadValType(ASTNodeAttr::Seg_Code));
263	2.35k	CodeSeg.getLocals().push_back(std::make_pair(LocalCnt, LocalType));
264	2.35k	}
265
266	17.5k	if (!Conf.getRuntimeConfigure().isForceInterpreter() &&
267	17.5k	WASMType != InputType::WASM) {
268		// For the AOT mode and not force interpreter in configure, skip the
269		// function body.
270	0	FMgr.seek(ExprSizeBound);
271	17.5k	} else {
272		// Read function body with expected expression size.
273	17.5k	EXPECTED_TRY(
274	17.5k	loadExpression(CodeSeg.getExpr(), ExprSizeBound).map_error([](auto E) {
275	17.5k	spdlog::error(ErrInfo::InfoAST(ASTNodeAttr::Seg_Code));
276	17.5k	return E;
277	17.5k	}));
278	17.5k	}
279
280	16.7k	return {};
281	17.5k	}
282
283		// Load binary of DataSegment node. See "include/loader/loader.h".
284	4.15k	Expect<void> Loader::loadSegment(AST::DataSegment &DataSeg) {
285	4.15k	auto ReportError = [this](auto E) {
286	27	return logLoadError(E, FMgr.getLastOffset(), ASTNodeAttr::Seg_Data);
287	27	};
288	4.15k	DataSeg.setMode(AST::DataSegment::DataMode::Passive);
289	4.15k	DataSeg.setIdx(0);
290
291		// Data segment binary format:
292		// ----------------------------------------
293		// Mode \| MemoryIdx \| OffExpr \| vec(byte)
294		// ------\|-----------\|---------\|-----------
295		// 0 \| \| v \| v
296		// 1 \| \| \| v
297		// 2 \| v \| v \| v
298		// ----------------------------------------
299		// Mode: data initial integer, u32
300		// MemoryIdx: target memory index, u32
301		// OffExpr: init offset expression, expr
302		// vec(byte): init data, vec(u8)
303
304		// Read the checking byte.
305	4.15k	EXPECTED_TRY(uint32_t Check, FMgr.readU32().map_error(ReportError));
306		// Check > 0 cases are for BulkMemoryOperations or ReferenceTypes proposal.
307	4.14k	if (Check > 0 && !Conf.hasProposal(Proposal::BulkMemoryOperations) &&
308	4.14k	!Conf.hasProposal(Proposal::ReferenceTypes)) {
309	0	return logNeedProposal(ErrCode::Value::ExpectedZeroByte,
310	0	Proposal::BulkMemoryOperations, FMgr.getLastOffset(),
311	0	ASTNodeAttr::Seg_Data);
312	0	}
313
314	4.14k	switch (Check) {
315	842	case 0x02: // 0x02 memidx expr vec(byte) , Active
316		// Read target memory index.
317	842	EXPECTED_TRY(FMgr.readU32().map_error(ReportError).map([&](auto Idx) {
318	840	DataSeg.setIdx(Idx);
319	840	}));
320	840	[[fallthrough]];
321
322	2.96k	case 0x00: // 0x00 expr vec(byte) , Active
323		// Read the offset expression.
324	2.96k	EXPECTED_TRY(loadExpression(DataSeg.getExpr()).map_error([](auto E) {
325	1.73k	spdlog::error(ErrInfo::InfoAST(ASTNodeAttr::Seg_Data));
326	1.73k	return E;
327	1.73k	}));
328	1.73k	DataSeg.setMode(AST::DataSegment::DataMode::Active);
329	1.73k	[[fallthrough]];
330
331	2.88k	case 0x01: // 0x01 vec(byte) , Passive
332	2.88k	{
333		// Read initialization data.
334	2.88k	EXPECTED_TRY(uint32_t VecCnt, loadVecCnt().map_error(ReportError));
335	2.87k	EXPECTED_TRY(FMgr.readBytes(VecCnt).map_error(ReportError).map([&](auto V) {
336	2.86k	DataSeg.getData() = std::move(V);
337	2.86k	}));
338	2.86k	break;
339	2.87k	}
340	2.86k	default:
341		// TODO: Correctness the error code once there's spec test.
342	30	return logLoadError(ErrCode::Value::IllegalGrammar, FMgr.getLastOffset(),
343	30	ASTNodeAttr::Seg_Data);
344	4.14k	}
345	2.86k	return {};
346	4.14k	}
347
348		} // namespace Loader
349		} // namespace WasmEdge