1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
|
//===- WriterUtils.cpp ----------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "WriterUtils.h"
#include "lld/Common/ErrorHandler.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/EndianStream.h"
#include "llvm/Support/LEB128.h"
#define DEBUG_TYPE "lld"
using namespace llvm;
using namespace llvm::wasm;
namespace lld {
std::string toString(ValType type) {
switch (type) {
case ValType::I32:
return "i32";
case ValType::I64:
return "i64";
case ValType::F32:
return "f32";
case ValType::F64:
return "f64";
case ValType::V128:
return "v128";
case ValType::EXNREF:
return "exnref";
case ValType::EXTERNREF:
return "externref";
}
llvm_unreachable("Invalid wasm::ValType");
}
std::string toString(const WasmSignature &sig) {
SmallString<128> s("(");
for (ValType type : sig.Params) {
if (s.size() != 1)
s += ", ";
s += toString(type);
}
s += ") -> ";
if (sig.Returns.empty())
s += "void";
else
s += toString(sig.Returns[0]);
return std::string(s.str());
}
std::string toString(const WasmGlobalType &type) {
return (type.Mutable ? "var " : "const ") +
toString(static_cast<ValType>(type.Type));
}
std::string toString(const WasmEventType &type) {
if (type.Attribute == WASM_EVENT_ATTRIBUTE_EXCEPTION)
return "exception";
return "unknown";
}
namespace wasm {
void debugWrite(uint64_t offset, const Twine &msg) {
LLVM_DEBUG(dbgs() << format(" | %08lld: ", offset) << msg << "\n");
}
void writeUleb128(raw_ostream &os, uint64_t number, const Twine &msg) {
debugWrite(os.tell(), msg + "[" + utohexstr(number) + "]");
encodeULEB128(number, os);
}
void writeSleb128(raw_ostream &os, int64_t number, const Twine &msg) {
debugWrite(os.tell(), msg + "[" + utohexstr(number) + "]");
encodeSLEB128(number, os);
}
void writeBytes(raw_ostream &os, const char *bytes, size_t count,
const Twine &msg) {
debugWrite(os.tell(), msg + " [data[" + Twine(count) + "]]");
os.write(bytes, count);
}
void writeStr(raw_ostream &os, StringRef string, const Twine &msg) {
debugWrite(os.tell(),
msg + " [str[" + Twine(string.size()) + "]: " + string + "]");
encodeULEB128(string.size(), os);
os.write(string.data(), string.size());
}
void writeU8(raw_ostream &os, uint8_t byte, const Twine &msg) {
debugWrite(os.tell(), msg + " [0x" + utohexstr(byte) + "]");
os << byte;
}
void writeU32(raw_ostream &os, uint32_t number, const Twine &msg) {
debugWrite(os.tell(), msg + "[0x" + utohexstr(number) + "]");
support::endian::write(os, number, support::little);
}
void writeU64(raw_ostream &os, uint64_t number, const Twine &msg) {
debugWrite(os.tell(), msg + "[0x" + utohexstr(number) + "]");
support::endian::write(os, number, support::little);
}
void writeValueType(raw_ostream &os, ValType type, const Twine &msg) {
writeU8(os, static_cast<uint8_t>(type),
msg + "[type: " + toString(type) + "]");
}
void writeSig(raw_ostream &os, const WasmSignature &sig) {
writeU8(os, WASM_TYPE_FUNC, "signature type");
writeUleb128(os, sig.Params.size(), "param Count");
for (ValType paramType : sig.Params) {
writeValueType(os, paramType, "param type");
}
writeUleb128(os, sig.Returns.size(), "result Count");
if (sig.Returns.size()) {
writeValueType(os, sig.Returns[0], "result type");
}
}
void writeI32Const(raw_ostream &os, int32_t number, const Twine &msg) {
writeU8(os, WASM_OPCODE_I32_CONST, "i32.const");
writeSleb128(os, number, msg);
}
void writeI64Const(raw_ostream &os, int64_t number, const Twine &msg) {
writeU8(os, WASM_OPCODE_I64_CONST, "i64.const");
writeSleb128(os, number, msg);
}
void writeMemArg(raw_ostream &os, uint32_t alignment, uint64_t offset) {
writeUleb128(os, alignment, "alignment");
writeUleb128(os, offset, "offset");
}
void writeInitExpr(raw_ostream &os, const WasmInitExpr &initExpr) {
writeU8(os, initExpr.Opcode, "opcode");
switch (initExpr.Opcode) {
case WASM_OPCODE_I32_CONST:
writeSleb128(os, initExpr.Value.Int32, "literal (i32)");
break;
case WASM_OPCODE_I64_CONST:
writeSleb128(os, initExpr.Value.Int64, "literal (i64)");
break;
case WASM_OPCODE_F32_CONST:
writeU32(os, initExpr.Value.Float32, "literal (f32)");
break;
case WASM_OPCODE_F64_CONST:
writeU64(os, initExpr.Value.Float64, "literal (f64)");
break;
case WASM_OPCODE_GLOBAL_GET:
writeUleb128(os, initExpr.Value.Global, "literal (global index)");
break;
case WASM_OPCODE_REF_NULL:
writeValueType(os, ValType::EXTERNREF, "literal (externref type)");
break;
default:
fatal("unknown opcode in init expr: " + Twine(initExpr.Opcode));
}
writeU8(os, WASM_OPCODE_END, "opcode:end");
}
void writeLimits(raw_ostream &os, const WasmLimits &limits) {
writeU8(os, limits.Flags, "limits flags");
writeUleb128(os, limits.Initial, "limits initial");
if (limits.Flags & WASM_LIMITS_FLAG_HAS_MAX)
writeUleb128(os, limits.Maximum, "limits max");
}
void writeGlobalType(raw_ostream &os, const WasmGlobalType &type) {
// TODO: Update WasmGlobalType to use ValType and remove this cast.
writeValueType(os, ValType(type.Type), "global type");
writeU8(os, type.Mutable, "global mutable");
}
void writeGlobal(raw_ostream &os, const WasmGlobal &global) {
writeGlobalType(os, global.Type);
writeInitExpr(os, global.InitExpr);
}
void writeEventType(raw_ostream &os, const WasmEventType &type) {
writeUleb128(os, type.Attribute, "event attribute");
writeUleb128(os, type.SigIndex, "sig index");
}
void writeEvent(raw_ostream &os, const WasmEvent &event) {
writeEventType(os, event.Type);
}
void writeTableType(raw_ostream &os, const llvm::wasm::WasmTable &type) {
writeU8(os, WASM_TYPE_FUNCREF, "table type");
writeLimits(os, type.Limits);
}
void writeImport(raw_ostream &os, const WasmImport &import) {
writeStr(os, import.Module, "import module name");
writeStr(os, import.Field, "import field name");
writeU8(os, import.Kind, "import kind");
switch (import.Kind) {
case WASM_EXTERNAL_FUNCTION:
writeUleb128(os, import.SigIndex, "import sig index");
break;
case WASM_EXTERNAL_GLOBAL:
writeGlobalType(os, import.Global);
break;
case WASM_EXTERNAL_EVENT:
writeEventType(os, import.Event);
break;
case WASM_EXTERNAL_MEMORY:
writeLimits(os, import.Memory);
break;
case WASM_EXTERNAL_TABLE:
writeTableType(os, import.Table);
break;
default:
fatal("unsupported import type: " + Twine(import.Kind));
}
}
void writeExport(raw_ostream &os, const WasmExport &export_) {
writeStr(os, export_.Name, "export name");
writeU8(os, export_.Kind, "export kind");
switch (export_.Kind) {
case WASM_EXTERNAL_FUNCTION:
writeUleb128(os, export_.Index, "function index");
break;
case WASM_EXTERNAL_GLOBAL:
writeUleb128(os, export_.Index, "global index");
break;
case WASM_EXTERNAL_EVENT:
writeUleb128(os, export_.Index, "event index");
break;
case WASM_EXTERNAL_MEMORY:
writeUleb128(os, export_.Index, "memory index");
break;
case WASM_EXTERNAL_TABLE:
writeUleb128(os, export_.Index, "table index");
break;
default:
fatal("unsupported export type: " + Twine(export_.Kind));
}
}
} // namespace wasm
} // namespace lld
|
