Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 1 | // Copyright 2016 the V8 project authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | #include "test/unittests/test-utils.h" |
| 6 | #include "testing/gmock/include/gmock/gmock.h" |
| 7 | |
| 8 | #include "src/v8.h" |
| 9 | |
| 10 | #include "src/wasm/wasm-interpreter.h" |
| 11 | #include "src/wasm/wasm-macro-gen.h" |
| 12 | |
| 13 | using testing::MakeMatcher; |
| 14 | using testing::Matcher; |
| 15 | using testing::MatcherInterface; |
| 16 | using testing::MatchResultListener; |
| 17 | using testing::StringMatchResultListener; |
| 18 | |
| 19 | namespace v8 { |
| 20 | namespace internal { |
| 21 | namespace wasm { |
| 22 | |
| 23 | #define B1(a) kExprBlock, a, kExprEnd |
| 24 | #define B2(a, b) kExprBlock, a, b, kExprEnd |
| 25 | #define B3(a, b, c) kExprBlock, a, b, c, kExprEnd |
| 26 | |
| 27 | struct ExpectedTarget { |
| 28 | pc_t pc; |
| 29 | ControlTransfer expected; |
| 30 | }; |
| 31 | |
| 32 | // For nicer error messages. |
| 33 | class ControlTransferMatcher : public MatcherInterface<const ControlTransfer&> { |
| 34 | public: |
| 35 | explicit ControlTransferMatcher(pc_t pc, const ControlTransfer& expected) |
| 36 | : pc_(pc), expected_(expected) {} |
| 37 | |
| 38 | void DescribeTo(std::ostream* os) const override { |
| 39 | *os << "@" << pc_ << " {pcdiff = " << expected_.pcdiff |
| 40 | << ", spdiff = " << expected_.spdiff |
| 41 | << ", action = " << expected_.action << "}"; |
| 42 | } |
| 43 | |
| 44 | bool MatchAndExplain(const ControlTransfer& input, |
| 45 | MatchResultListener* listener) const override { |
| 46 | if (input.pcdiff != expected_.pcdiff || input.spdiff != expected_.spdiff || |
| 47 | input.action != expected_.action) { |
| 48 | *listener << "@" << pc_ << " {pcdiff = " << input.pcdiff |
| 49 | << ", spdiff = " << input.spdiff |
| 50 | << ", action = " << input.action << "}"; |
| 51 | return false; |
| 52 | } |
| 53 | return true; |
| 54 | } |
| 55 | |
| 56 | private: |
| 57 | pc_t pc_; |
| 58 | const ControlTransfer& expected_; |
| 59 | }; |
| 60 | |
| 61 | class ControlTransferTest : public TestWithZone { |
| 62 | public: |
| 63 | void CheckControlTransfers(const byte* start, const byte* end, |
| 64 | ExpectedTarget* expected_targets, |
| 65 | size_t num_targets) { |
| 66 | ControlTransferMap map = |
| 67 | WasmInterpreter::ComputeControlTransfersForTesting(zone(), start, end); |
| 68 | // Check all control targets in the map. |
| 69 | for (size_t i = 0; i < num_targets; i++) { |
| 70 | pc_t pc = expected_targets[i].pc; |
| 71 | auto it = map.find(pc); |
| 72 | if (it == map.end()) { |
| 73 | printf("expected control target @ +%zu\n", pc); |
| 74 | EXPECT_TRUE(false); |
| 75 | } else { |
| 76 | ControlTransfer& expected = expected_targets[i].expected; |
| 77 | ControlTransfer& target = it->second; |
| 78 | EXPECT_THAT(target, |
| 79 | MakeMatcher(new ControlTransferMatcher(pc, expected))); |
| 80 | } |
| 81 | } |
| 82 | |
| 83 | // Check there are no other control targets. |
| 84 | for (pc_t pc = 0; start + pc < end; pc++) { |
| 85 | bool found = false; |
| 86 | for (size_t i = 0; i < num_targets; i++) { |
| 87 | if (expected_targets[i].pc == pc) { |
| 88 | found = true; |
| 89 | break; |
| 90 | } |
| 91 | } |
| 92 | if (found) continue; |
| 93 | if (map.find(pc) != map.end()) { |
| 94 | printf("expected no control @ +%zu\n", pc); |
| 95 | EXPECT_TRUE(false); |
| 96 | } |
| 97 | } |
| 98 | } |
| 99 | }; |
| 100 | |
| 101 | // Macro for simplifying tests below. |
| 102 | #define EXPECT_TARGETS(...) \ |
| 103 | do { \ |
| 104 | ExpectedTarget pairs[] = {__VA_ARGS__}; \ |
| 105 | CheckControlTransfers(code, code + sizeof(code), pairs, arraysize(pairs)); \ |
| 106 | } while (false) |
| 107 | |
| 108 | TEST_F(ControlTransferTest, SimpleIf) { |
| 109 | byte code[] = { |
| 110 | kExprI32Const, // @0 |
| 111 | 0, // +1 |
| 112 | kExprIf, // @2 |
| 113 | kExprEnd // @3 |
| 114 | }; |
| 115 | EXPECT_TARGETS({2, {2, 0, ControlTransfer::kPushVoid}}, // -- |
| 116 | {3, {1, 0, ControlTransfer::kPushVoid}}); |
| 117 | } |
| 118 | |
| 119 | TEST_F(ControlTransferTest, SimpleIf1) { |
| 120 | byte code[] = { |
| 121 | kExprI32Const, // @0 |
| 122 | 0, // +1 |
| 123 | kExprIf, // @2 |
| 124 | kExprNop, // @3 |
| 125 | kExprEnd // @4 |
| 126 | }; |
| 127 | EXPECT_TARGETS({2, {3, 0, ControlTransfer::kPushVoid}}, // -- |
| 128 | {4, {1, 1, ControlTransfer::kPopAndRepush}}); |
| 129 | } |
| 130 | |
| 131 | TEST_F(ControlTransferTest, SimpleIf2) { |
| 132 | byte code[] = { |
| 133 | kExprI32Const, // @0 |
| 134 | 0, // +1 |
| 135 | kExprIf, // @2 |
| 136 | kExprNop, // @3 |
| 137 | kExprNop, // @4 |
| 138 | kExprEnd // @5 |
| 139 | }; |
| 140 | EXPECT_TARGETS({2, {4, 0, ControlTransfer::kPushVoid}}, // -- |
| 141 | {5, {1, 2, ControlTransfer::kPopAndRepush}}); |
| 142 | } |
| 143 | |
| 144 | TEST_F(ControlTransferTest, SimpleIfElse) { |
| 145 | byte code[] = { |
| 146 | kExprI32Const, // @0 |
| 147 | 0, // +1 |
| 148 | kExprIf, // @2 |
| 149 | kExprElse, // @3 |
| 150 | kExprEnd // @4 |
| 151 | }; |
| 152 | EXPECT_TARGETS({2, {2, 0, ControlTransfer::kNoAction}}, // -- |
| 153 | {3, {2, 0, ControlTransfer::kPushVoid}}, // -- |
| 154 | {4, {1, 0, ControlTransfer::kPushVoid}}); |
| 155 | } |
| 156 | |
| 157 | TEST_F(ControlTransferTest, SimpleIfElse1) { |
| 158 | byte code[] = { |
| 159 | kExprI32Const, // @0 |
| 160 | 0, // +1 |
| 161 | kExprIf, // @2 |
| 162 | kExprNop, // @3 |
| 163 | kExprElse, // @4 |
| 164 | kExprNop, // @5 |
| 165 | kExprEnd // @6 |
| 166 | }; |
| 167 | EXPECT_TARGETS({2, {3, 0, ControlTransfer::kNoAction}}, // -- |
| 168 | {4, {3, 1, ControlTransfer::kPopAndRepush}}, // -- |
| 169 | {6, {1, 1, ControlTransfer::kPopAndRepush}}); |
| 170 | } |
| 171 | |
| 172 | TEST_F(ControlTransferTest, IfBr) { |
| 173 | byte code[] = { |
| 174 | kExprI32Const, // @0 |
| 175 | 0, // +1 |
| 176 | kExprIf, // @2 |
| 177 | kExprBr, // @3 |
| 178 | ARITY_0, // +1 |
| 179 | 0, // +1 |
| 180 | kExprEnd // @6 |
| 181 | }; |
| 182 | EXPECT_TARGETS({2, {5, 0, ControlTransfer::kPushVoid}}, // -- |
| 183 | {3, {4, 0, ControlTransfer::kPushVoid}}, // -- |
| 184 | {6, {1, 1, ControlTransfer::kPopAndRepush}}); |
| 185 | } |
| 186 | |
| 187 | TEST_F(ControlTransferTest, IfBrElse) { |
| 188 | byte code[] = { |
| 189 | kExprI32Const, // @0 |
| 190 | 0, // +1 |
| 191 | kExprIf, // @2 |
| 192 | kExprBr, // @3 |
| 193 | ARITY_0, // +1 |
| 194 | 0, // +1 |
| 195 | kExprElse, // @6 |
| 196 | kExprEnd // @7 |
| 197 | }; |
| 198 | EXPECT_TARGETS({2, {5, 0, ControlTransfer::kNoAction}}, // -- |
| 199 | {3, {5, 0, ControlTransfer::kPushVoid}}, // -- |
| 200 | {6, {2, 1, ControlTransfer::kPopAndRepush}}, // -- |
| 201 | {7, {1, 0, ControlTransfer::kPushVoid}}); |
| 202 | } |
| 203 | |
| 204 | TEST_F(ControlTransferTest, IfElseBr) { |
| 205 | byte code[] = { |
| 206 | kExprI32Const, // @0 |
| 207 | 0, // +1 |
| 208 | kExprIf, // @2 |
| 209 | kExprNop, // @3 |
| 210 | kExprElse, // @4 |
| 211 | kExprBr, // @5 |
| 212 | ARITY_0, // +1 |
| 213 | 0, // +1 |
| 214 | kExprEnd // @8 |
| 215 | }; |
| 216 | EXPECT_TARGETS({2, {3, 0, ControlTransfer::kNoAction}}, // -- |
| 217 | {4, {5, 1, ControlTransfer::kPopAndRepush}}, // -- |
| 218 | {5, {4, 0, ControlTransfer::kPushVoid}}, // -- |
| 219 | {8, {1, 1, ControlTransfer::kPopAndRepush}}); |
| 220 | } |
| 221 | |
| 222 | TEST_F(ControlTransferTest, BlockEmpty) { |
| 223 | byte code[] = { |
| 224 | kExprBlock, // @0 |
| 225 | kExprEnd // @1 |
| 226 | }; |
| 227 | EXPECT_TARGETS({1, {1, 0, ControlTransfer::kPushVoid}}); |
| 228 | } |
| 229 | |
| 230 | TEST_F(ControlTransferTest, Br0) { |
| 231 | byte code[] = { |
| 232 | kExprBlock, // @0 |
| 233 | kExprBr, // @1 |
| 234 | ARITY_0, // +1 |
| 235 | 0, // +1 |
| 236 | kExprEnd // @4 |
| 237 | }; |
| 238 | EXPECT_TARGETS({1, {4, 0, ControlTransfer::kPushVoid}}, |
| 239 | {4, {1, 1, ControlTransfer::kPopAndRepush}}); |
| 240 | } |
| 241 | |
| 242 | TEST_F(ControlTransferTest, Br1) { |
| 243 | byte code[] = { |
| 244 | kExprBlock, // @0 |
| 245 | kExprNop, // @1 |
| 246 | kExprBr, // @2 |
| 247 | ARITY_0, // +1 |
| 248 | 0, // +1 |
| 249 | kExprEnd // @5 |
| 250 | }; |
| 251 | EXPECT_TARGETS({2, {4, 1, ControlTransfer::kPopAndRepush}}, // -- |
| 252 | {5, {1, 2, ControlTransfer::kPopAndRepush}}); |
| 253 | } |
| 254 | |
| 255 | TEST_F(ControlTransferTest, Br2) { |
| 256 | byte code[] = { |
| 257 | kExprBlock, // @0 |
| 258 | kExprNop, // @1 |
| 259 | kExprNop, // @2 |
| 260 | kExprBr, // @3 |
| 261 | ARITY_0, // +1 |
| 262 | 0, // +1 |
| 263 | kExprEnd // @6 |
| 264 | }; |
| 265 | EXPECT_TARGETS({3, {4, 2, ControlTransfer::kPopAndRepush}}, // -- |
| 266 | {6, {1, 3, ControlTransfer::kPopAndRepush}}); |
| 267 | } |
| 268 | |
| 269 | TEST_F(ControlTransferTest, Br0b) { |
| 270 | byte code[] = { |
| 271 | kExprBlock, // @0 |
| 272 | kExprBr, // @1 |
| 273 | ARITY_0, // +1 |
| 274 | 0, // +1 |
| 275 | kExprNop, // @4 |
| 276 | kExprEnd // @5 |
| 277 | }; |
| 278 | EXPECT_TARGETS({1, {5, 0, ControlTransfer::kPushVoid}}, // -- |
| 279 | {5, {1, 2, ControlTransfer::kPopAndRepush}}); |
| 280 | } |
| 281 | |
| 282 | TEST_F(ControlTransferTest, Br0c) { |
| 283 | byte code[] = { |
| 284 | kExprBlock, // @0 |
| 285 | kExprBr, // @1 |
| 286 | ARITY_0, // +1 |
| 287 | 0, // +1 |
| 288 | kExprNop, // @4 |
| 289 | kExprNop, // @5 |
| 290 | kExprEnd // @6 |
| 291 | }; |
| 292 | EXPECT_TARGETS({1, {6, 0, ControlTransfer::kPushVoid}}, // -- |
| 293 | {6, {1, 3, ControlTransfer::kPopAndRepush}}); |
| 294 | } |
| 295 | |
| 296 | TEST_F(ControlTransferTest, SimpleLoop1) { |
| 297 | byte code[] = { |
| 298 | kExprLoop, // @0 |
| 299 | kExprBr, // @1 |
| 300 | ARITY_0, // +1 |
| 301 | 0, // +1 |
| 302 | kExprEnd // @4 |
| 303 | }; |
| 304 | EXPECT_TARGETS({1, {-1, 0, ControlTransfer::kNoAction}}, // -- |
| 305 | {4, {1, 1, ControlTransfer::kPopAndRepush}}); |
| 306 | } |
| 307 | |
| 308 | TEST_F(ControlTransferTest, SimpleLoop2) { |
| 309 | byte code[] = { |
| 310 | kExprLoop, // @0 |
| 311 | kExprNop, // @1 |
| 312 | kExprBr, // @2 |
| 313 | ARITY_0, // +1 |
| 314 | 0, // +1 |
| 315 | kExprEnd // @5 |
| 316 | }; |
| 317 | EXPECT_TARGETS({2, {-2, 1, ControlTransfer::kNoAction}}, // -- |
| 318 | {5, {1, 2, ControlTransfer::kPopAndRepush}}); |
| 319 | } |
| 320 | |
| 321 | TEST_F(ControlTransferTest, SimpleLoopExit1) { |
| 322 | byte code[] = { |
| 323 | kExprLoop, // @0 |
| 324 | kExprBr, // @1 |
| 325 | ARITY_0, // +1 |
| 326 | 1, // +1 |
| 327 | kExprEnd // @4 |
| 328 | }; |
| 329 | EXPECT_TARGETS({1, {4, 0, ControlTransfer::kPushVoid}}, // -- |
| 330 | {4, {1, 1, ControlTransfer::kPopAndRepush}}); |
| 331 | } |
| 332 | |
| 333 | TEST_F(ControlTransferTest, SimpleLoopExit2) { |
| 334 | byte code[] = { |
| 335 | kExprLoop, // @0 |
| 336 | kExprNop, // @1 |
| 337 | kExprBr, // @2 |
| 338 | ARITY_0, // +1 |
| 339 | 1, // +1 |
| 340 | kExprEnd // @5 |
| 341 | }; |
| 342 | EXPECT_TARGETS({2, {4, 1, ControlTransfer::kPopAndRepush}}, // -- |
| 343 | {5, {1, 2, ControlTransfer::kPopAndRepush}}); |
| 344 | } |
| 345 | |
| 346 | TEST_F(ControlTransferTest, BrTable0) { |
| 347 | byte code[] = { |
| 348 | kExprBlock, // @0 |
| 349 | kExprI8Const, // @1 |
| 350 | 0, // +1 |
| 351 | kExprBrTable, // @3 |
| 352 | ARITY_0, // +1 |
| 353 | 0, // +1 |
| 354 | U32_LE(0), // +4 |
| 355 | kExprEnd // @10 |
| 356 | }; |
| 357 | EXPECT_TARGETS({3, {8, 0, ControlTransfer::kPushVoid}}, // -- |
| 358 | {10, {1, 1, ControlTransfer::kPopAndRepush}}); |
| 359 | } |
| 360 | |
| 361 | TEST_F(ControlTransferTest, BrTable1) { |
| 362 | byte code[] = { |
| 363 | kExprBlock, // @0 |
| 364 | kExprI8Const, // @1 |
| 365 | 0, // +1 |
| 366 | kExprBrTable, // @3 |
| 367 | ARITY_0, // +1 |
| 368 | 1, // +1 |
| 369 | U32_LE(0), // +4 |
| 370 | U32_LE(0), // +4 |
| 371 | kExprEnd // @14 |
| 372 | }; |
| 373 | EXPECT_TARGETS({3, {12, 0, ControlTransfer::kPushVoid}}, // -- |
| 374 | {4, {11, 0, ControlTransfer::kPushVoid}}, // -- |
| 375 | {14, {1, 1, ControlTransfer::kPopAndRepush}}); |
| 376 | } |
| 377 | |
| 378 | TEST_F(ControlTransferTest, BrTable2) { |
| 379 | byte code[] = { |
| 380 | kExprBlock, // @0 |
| 381 | kExprBlock, // @1 |
| 382 | kExprI8Const, // @2 |
| 383 | 0, // +1 |
| 384 | kExprBrTable, // @4 |
| 385 | ARITY_0, // +1 |
| 386 | 2, // +1 |
| 387 | U32_LE(0), // +4 |
| 388 | U32_LE(0), // +4 |
| 389 | U32_LE(1), // +4 |
| 390 | kExprEnd, // @19 |
| 391 | kExprEnd // @19 |
| 392 | }; |
| 393 | EXPECT_TARGETS({4, {16, 0, ControlTransfer::kPushVoid}}, // -- |
| 394 | {5, {15, 0, ControlTransfer::kPushVoid}}, // -- |
| 395 | {6, {15, 0, ControlTransfer::kPushVoid}}, // -- |
| 396 | {19, {1, 1, ControlTransfer::kPopAndRepush}}, // -- |
| 397 | {20, {1, 1, ControlTransfer::kPopAndRepush}}); |
| 398 | } |
| 399 | |
| 400 | } // namespace wasm |
| 401 | } // namespace internal |
| 402 | } // namespace v8 |