Andreas Gampe | 5a4fa82 | 2014-03-31 16:50:12 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (C) 2014 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #ifndef ART_COMPILER_UTILS_ASSEMBLER_TEST_H_ |
| 18 | #define ART_COMPILER_UTILS_ASSEMBLER_TEST_H_ |
| 19 | |
| 20 | #include "assembler.h" |
| 21 | |
| 22 | #include "gtest/gtest.h" |
| 23 | |
| 24 | #include <cstdio> |
| 25 | #include <cstdlib> |
| 26 | #include <fstream> |
| 27 | #include <iostream> |
| 28 | #include <iterator> |
| 29 | #include <sys/stat.h> |
| 30 | |
| 31 | namespace art { |
| 32 | |
| 33 | template<typename Ass, typename Reg, typename Imm> |
| 34 | class AssemblerTest : public testing::Test { |
| 35 | public: |
| 36 | Ass* GetAssembler() { |
| 37 | return assembler_.get(); |
| 38 | } |
| 39 | |
| 40 | typedef std::string (*TestFn)(Ass* assembler); |
| 41 | |
| 42 | void DriverFn(TestFn f, std::string test_name) { |
| 43 | Driver(f(assembler_.get()), test_name); |
| 44 | } |
| 45 | |
| 46 | // This driver assumes the assembler has already been called. |
| 47 | void DriverStr(std::string assembly_string, std::string test_name) { |
| 48 | Driver(assembly_string, test_name); |
| 49 | } |
| 50 | |
| 51 | std::string RepeatR(void (Ass::*f)(Reg), std::string fmt) { |
| 52 | const std::vector<Reg*> registers = GetRegisters(); |
| 53 | std::string str; |
| 54 | for (auto reg : registers) { |
| 55 | (assembler_.get()->*f)(*reg); |
| 56 | std::string base = fmt; |
| 57 | |
| 58 | size_t reg_index = base.find("{reg}"); |
| 59 | if (reg_index != std::string::npos) { |
| 60 | std::ostringstream sreg; |
| 61 | sreg << *reg; |
| 62 | std::string reg_string = sreg.str(); |
| 63 | base.replace(reg_index, 5, reg_string); |
| 64 | } |
| 65 | |
| 66 | if (str.size() > 0) { |
| 67 | str += "\n"; |
| 68 | } |
| 69 | str += base; |
| 70 | } |
| 71 | // Add a newline at the end. |
| 72 | str += "\n"; |
| 73 | return str; |
| 74 | } |
| 75 | |
| 76 | std::string RepeatRR(void (Ass::*f)(Reg, Reg), std::string fmt) { |
| 77 | const std::vector<Reg*> registers = GetRegisters(); |
| 78 | std::string str; |
| 79 | for (auto reg1 : registers) { |
| 80 | for (auto reg2 : registers) { |
| 81 | (assembler_.get()->*f)(*reg1, *reg2); |
| 82 | std::string base = fmt; |
| 83 | |
| 84 | size_t reg1_index = base.find("{reg1}"); |
| 85 | if (reg1_index != std::string::npos) { |
| 86 | std::ostringstream sreg; |
| 87 | sreg << *reg1; |
| 88 | std::string reg_string = sreg.str(); |
| 89 | base.replace(reg1_index, 6, reg_string); |
| 90 | } |
| 91 | |
| 92 | size_t reg2_index = base.find("{reg2}"); |
| 93 | if (reg2_index != std::string::npos) { |
| 94 | std::ostringstream sreg; |
| 95 | sreg << *reg2; |
| 96 | std::string reg_string = sreg.str(); |
| 97 | base.replace(reg2_index, 6, reg_string); |
| 98 | } |
| 99 | |
| 100 | if (str.size() > 0) { |
| 101 | str += "\n"; |
| 102 | } |
| 103 | str += base; |
| 104 | } |
| 105 | } |
| 106 | // Add a newline at the end. |
| 107 | str += "\n"; |
| 108 | return str; |
| 109 | } |
| 110 | |
| 111 | std::string RepeatRI(void (Ass::*f)(Reg, const Imm&), size_t imm_bytes, std::string fmt) { |
| 112 | const std::vector<Reg*> registers = GetRegisters(); |
| 113 | std::string str; |
| 114 | std::vector<int64_t> imms = CreateImmediateValues(imm_bytes); |
| 115 | for (auto reg : registers) { |
| 116 | for (int64_t imm : imms) { |
| 117 | Imm* new_imm = CreateImmediate(imm); |
| 118 | (assembler_.get()->*f)(*reg, *new_imm); |
| 119 | delete new_imm; |
| 120 | std::string base = fmt; |
| 121 | |
| 122 | size_t reg_index = base.find("{reg}"); |
| 123 | if (reg_index != std::string::npos) { |
| 124 | std::ostringstream sreg; |
| 125 | sreg << *reg; |
| 126 | std::string reg_string = sreg.str(); |
| 127 | base.replace(reg_index, 5, reg_string); |
| 128 | } |
| 129 | |
| 130 | size_t imm_index = base.find("{imm}"); |
| 131 | if (imm_index != std::string::npos) { |
| 132 | std::ostringstream sreg; |
| 133 | sreg << imm; |
| 134 | std::string imm_string = sreg.str(); |
| 135 | base.replace(imm_index, 5, imm_string); |
| 136 | } |
| 137 | |
| 138 | if (str.size() > 0) { |
| 139 | str += "\n"; |
| 140 | } |
| 141 | str += base; |
| 142 | } |
| 143 | } |
| 144 | // Add a newline at the end. |
| 145 | str += "\n"; |
| 146 | return str; |
| 147 | } |
| 148 | |
| 149 | std::string RepeatI(void (Ass::*f)(const Imm&), size_t imm_bytes, std::string fmt) { |
| 150 | std::string str; |
| 151 | std::vector<int64_t> imms = CreateImmediateValues(imm_bytes); |
| 152 | for (int64_t imm : imms) { |
| 153 | Imm* new_imm = CreateImmediate(imm); |
| 154 | (assembler_.get()->*f)(*new_imm); |
| 155 | delete new_imm; |
| 156 | std::string base = fmt; |
| 157 | |
| 158 | size_t imm_index = base.find("{imm}"); |
| 159 | if (imm_index != std::string::npos) { |
| 160 | std::ostringstream sreg; |
| 161 | sreg << imm; |
| 162 | std::string imm_string = sreg.str(); |
| 163 | base.replace(imm_index, 5, imm_string); |
| 164 | } |
| 165 | |
| 166 | if (str.size() > 0) { |
| 167 | str += "\n"; |
| 168 | } |
| 169 | str += base; |
| 170 | } |
| 171 | // Add a newline at the end. |
| 172 | str += "\n"; |
| 173 | return str; |
| 174 | } |
| 175 | |
| 176 | // This is intended to be run as a test. |
| 177 | bool CheckTools() { |
| 178 | if (!FileExists(GetAssemblerCommand())) { |
| 179 | return false; |
| 180 | } |
| 181 | LOG(INFO) << "Chosen assembler command: " << GetAssemblerCommand(); |
| 182 | |
| 183 | if (!FileExists(GetObjdumpCommand())) { |
| 184 | return false; |
| 185 | } |
| 186 | LOG(INFO) << "Chosen objdump command: " << GetObjdumpCommand(); |
| 187 | |
| 188 | // Disassembly is optional. |
| 189 | std::string disassembler = GetDisassembleCommand(); |
| 190 | if (disassembler.length() != 0) { |
| 191 | if (!FileExists(disassembler)) { |
| 192 | return false; |
| 193 | } |
| 194 | LOG(INFO) << "Chosen disassemble command: " << GetDisassembleCommand(); |
| 195 | } else { |
| 196 | LOG(INFO) << "No disassembler given."; |
| 197 | } |
| 198 | |
| 199 | return true; |
| 200 | } |
| 201 | |
| 202 | protected: |
| 203 | void SetUp() OVERRIDE { |
| 204 | assembler_.reset(new Ass()); |
| 205 | |
| 206 | SetUpHelpers(); |
| 207 | } |
| 208 | |
| 209 | // Override this to set up any architecture-specific things, e.g., register vectors. |
| 210 | virtual void SetUpHelpers() {} |
| 211 | |
| 212 | virtual std::vector<Reg*> GetRegisters() = 0; |
| 213 | |
| 214 | // Get the typically used name for this architecture, e.g., aarch64, x86_64, ... |
| 215 | virtual std::string GetArchitectureString() = 0; |
| 216 | |
| 217 | // Get the name of the assembler, e.g., "as" by default. |
| 218 | virtual std::string GetAssemblerCmdName() { |
| 219 | return "as"; |
| 220 | } |
| 221 | |
| 222 | // Switches to the assembler command. Default none. |
| 223 | virtual std::string GetAssemblerParameters() { |
| 224 | return ""; |
| 225 | } |
| 226 | |
| 227 | // Return the host assembler command for this test. |
| 228 | virtual std::string GetAssemblerCommand() { |
| 229 | // Already resolved it once? |
| 230 | if (resolved_assembler_cmd_.length() != 0) { |
| 231 | return resolved_assembler_cmd_; |
| 232 | } |
| 233 | |
| 234 | std::string line = FindTool(GetAssemblerCmdName()); |
| 235 | if (line.length() == 0) { |
| 236 | return line; |
| 237 | } |
| 238 | |
| 239 | resolved_assembler_cmd_ = line + GetAssemblerParameters(); |
| 240 | |
| 241 | return line; |
| 242 | } |
| 243 | |
| 244 | // Get the name of the objdump, e.g., "objdump" by default. |
| 245 | virtual std::string GetObjdumpCmdName() { |
| 246 | return "objdump"; |
| 247 | } |
| 248 | |
| 249 | // Switches to the objdump command. Default is " -h". |
| 250 | virtual std::string GetObjdumpParameters() { |
| 251 | return " -h"; |
| 252 | } |
| 253 | |
| 254 | // Return the host objdump command for this test. |
| 255 | virtual std::string GetObjdumpCommand() { |
| 256 | // Already resolved it once? |
| 257 | if (resolved_objdump_cmd_.length() != 0) { |
| 258 | return resolved_objdump_cmd_; |
| 259 | } |
| 260 | |
| 261 | std::string line = FindTool(GetObjdumpCmdName()); |
| 262 | if (line.length() == 0) { |
| 263 | return line; |
| 264 | } |
| 265 | |
| 266 | resolved_objdump_cmd_ = line + GetObjdumpParameters(); |
| 267 | |
| 268 | return line; |
| 269 | } |
| 270 | |
| 271 | // Get the name of the objdump, e.g., "objdump" by default. |
| 272 | virtual std::string GetDisassembleCmdName() { |
| 273 | return "objdump"; |
| 274 | } |
| 275 | |
| 276 | // Switches to the objdump command. As it's a binary, one needs to push the architecture and |
| 277 | // such to objdump, so it's architecture-specific and there is no default. |
| 278 | virtual std::string GetDisassembleParameters() = 0; |
| 279 | |
| 280 | // Return the host disassembler command for this test. |
| 281 | virtual std::string GetDisassembleCommand() { |
| 282 | // Already resolved it once? |
| 283 | if (resolved_disassemble_cmd_.length() != 0) { |
| 284 | return resolved_disassemble_cmd_; |
| 285 | } |
| 286 | |
| 287 | std::string line = FindTool(GetDisassembleCmdName()); |
| 288 | if (line.length() == 0) { |
| 289 | return line; |
| 290 | } |
| 291 | |
| 292 | resolved_disassemble_cmd_ = line + GetDisassembleParameters(); |
| 293 | |
| 294 | return line; |
| 295 | } |
| 296 | |
| 297 | // Create a couple of immediate values up to the number of bytes given. |
| 298 | virtual std::vector<int64_t> CreateImmediateValues(size_t imm_bytes) { |
| 299 | std::vector<int64_t> res; |
| 300 | res.push_back(0); |
| 301 | res.push_back(-1); |
| 302 | res.push_back(0x12); |
| 303 | if (imm_bytes >= 2) { |
| 304 | res.push_back(0x1234); |
| 305 | res.push_back(-0x1234); |
| 306 | if (imm_bytes >= 4) { |
| 307 | res.push_back(0x12345678); |
| 308 | res.push_back(-0x12345678); |
| 309 | if (imm_bytes >= 6) { |
| 310 | res.push_back(0x123456789ABC); |
| 311 | res.push_back(-0x123456789ABC); |
| 312 | if (imm_bytes >= 8) { |
| 313 | res.push_back(0x123456789ABCDEF0); |
| 314 | res.push_back(-0x123456789ABCDEF0); |
| 315 | } |
| 316 | } |
| 317 | } |
| 318 | } |
| 319 | return res; |
| 320 | } |
| 321 | |
| 322 | // Create an immediate from the specific value. |
| 323 | virtual Imm* CreateImmediate(int64_t imm_value) = 0; |
| 324 | |
| 325 | private: |
| 326 | // Driver() assembles and compares the results. If the results are not equal and we have a |
| 327 | // disassembler, disassemble both and check whether they have the same mnemonics (in which case |
| 328 | // we just warn). |
| 329 | void Driver(std::string assembly_text, std::string test_name) { |
| 330 | EXPECT_NE(assembly_text.length(), 0U) << "Empty assembly"; |
| 331 | |
| 332 | NativeAssemblerResult res; |
| 333 | Compile(assembly_text, &res, test_name); |
| 334 | |
| 335 | EXPECT_TRUE(res.ok) << res.error_msg; |
| 336 | if (!res.ok) { |
| 337 | // No way of continuing. |
| 338 | return; |
| 339 | } |
| 340 | |
| 341 | size_t cs = assembler_->CodeSize(); |
| 342 | UniquePtr<std::vector<uint8_t> > data(new std::vector<uint8_t>(cs)); |
| 343 | MemoryRegion code(&(*data)[0], data->size()); |
| 344 | assembler_->FinalizeInstructions(code); |
| 345 | |
| 346 | if (*data == *res.code) { |
| 347 | Clean(&res); |
| 348 | } else { |
| 349 | if (DisassembleBinaries(*data, *res.code, test_name)) { |
| 350 | if (data->size() > res.code->size()) { |
| 351 | LOG(WARNING) << "Assembly code is not identical, but disassembly of machine code is " |
| 352 | "equal: this implies sub-optimal encoding! Our code size=" << data->size() << |
| 353 | ", gcc size=" << res.code->size(); |
| 354 | } else { |
| 355 | LOG(INFO) << "GCC chose a different encoding than ours, but the overall length is the " |
| 356 | "same."; |
| 357 | } |
| 358 | } else { |
| 359 | // This will output the assembly. |
| 360 | EXPECT_EQ(*data, *res.code) << "Outputs (and disassembly) not identical."; |
| 361 | } |
| 362 | } |
| 363 | } |
| 364 | |
| 365 | // Structure to store intermediates and results. |
| 366 | struct NativeAssemblerResult { |
| 367 | bool ok; |
| 368 | std::string error_msg; |
| 369 | std::string base_name; |
| 370 | UniquePtr<std::vector<uint8_t>> code; |
| 371 | uintptr_t length; |
| 372 | }; |
| 373 | |
| 374 | // Compile the assembly file from_file to a binary file to_file. Returns true on success. |
| 375 | bool Assemble(const char* from_file, const char* to_file, std::string* error_msg) { |
| 376 | bool have_assembler = FileExists(GetAssemblerCommand()); |
| 377 | EXPECT_TRUE(have_assembler) << "Cannot find assembler:" << GetAssemblerCommand(); |
| 378 | if (!have_assembler) { |
| 379 | return false; |
| 380 | } |
| 381 | |
| 382 | std::vector<std::string> args; |
| 383 | |
| 384 | args.push_back(GetAssemblerCommand()); |
| 385 | args.push_back("-o"); |
| 386 | args.push_back(to_file); |
| 387 | args.push_back(from_file); |
| 388 | |
| 389 | return Exec(args, error_msg); |
| 390 | } |
| 391 | |
| 392 | // Runs objdump -h on the binary file and extracts the first line with .text. |
| 393 | // Returns "" on failure. |
| 394 | std::string Objdump(std::string file) { |
| 395 | bool have_objdump = FileExists(GetObjdumpCommand()); |
| 396 | EXPECT_TRUE(have_objdump) << "Cannot find objdump: " << GetObjdumpCommand(); |
| 397 | if (!have_objdump) { |
| 398 | return ""; |
| 399 | } |
| 400 | |
| 401 | std::string error_msg; |
| 402 | std::vector<std::string> args; |
| 403 | |
| 404 | args.push_back(GetObjdumpCommand()); |
| 405 | args.push_back(file); |
| 406 | args.push_back(">"); |
| 407 | args.push_back(file+".dump"); |
| 408 | std::string cmd = Join(args, ' '); |
| 409 | |
| 410 | args.clear(); |
| 411 | args.push_back("/bin/sh"); |
| 412 | args.push_back("-c"); |
| 413 | args.push_back(cmd); |
| 414 | |
| 415 | if (!Exec(args, &error_msg)) { |
| 416 | EXPECT_TRUE(false) << error_msg; |
| 417 | } |
| 418 | |
| 419 | std::ifstream dump(file+".dump"); |
| 420 | |
| 421 | std::string line; |
| 422 | bool found = false; |
| 423 | while (std::getline(dump, line)) { |
| 424 | if (line.find(".text") != line.npos) { |
| 425 | found = true; |
| 426 | break; |
| 427 | } |
| 428 | } |
| 429 | |
| 430 | dump.close(); |
| 431 | |
| 432 | if (found) { |
| 433 | return line; |
| 434 | } else { |
| 435 | return ""; |
| 436 | } |
| 437 | } |
| 438 | |
| 439 | // Disassemble both binaries and compare the text. |
| 440 | bool DisassembleBinaries(std::vector<uint8_t>& data, std::vector<uint8_t>& as, |
| 441 | std::string test_name) { |
| 442 | std::string disassembler = GetDisassembleCommand(); |
| 443 | if (disassembler.length() == 0) { |
| 444 | LOG(WARNING) << "No dissassembler command."; |
| 445 | return false; |
| 446 | } |
| 447 | |
| 448 | std::string data_name = WriteToFile(data, test_name + ".ass"); |
| 449 | std::string error_msg; |
| 450 | if (!DisassembleBinary(data_name, &error_msg)) { |
| 451 | LOG(INFO) << "Error disassembling: " << error_msg; |
| 452 | std::remove(data_name.c_str()); |
| 453 | return false; |
| 454 | } |
| 455 | |
| 456 | std::string as_name = WriteToFile(as, test_name + ".gcc"); |
| 457 | if (!DisassembleBinary(as_name, &error_msg)) { |
| 458 | LOG(INFO) << "Error disassembling: " << error_msg; |
| 459 | std::remove(data_name.c_str()); |
| 460 | std::remove((data_name + ".dis").c_str()); |
| 461 | std::remove(as_name.c_str()); |
| 462 | return false; |
| 463 | } |
| 464 | |
| 465 | bool result = CompareFiles(data_name + ".dis", as_name + ".dis"); |
| 466 | |
| 467 | if (result) { |
| 468 | std::remove(data_name.c_str()); |
| 469 | std::remove(as_name.c_str()); |
| 470 | std::remove((data_name + ".dis").c_str()); |
| 471 | std::remove((as_name + ".dis").c_str()); |
| 472 | } |
| 473 | |
| 474 | return result; |
| 475 | } |
| 476 | |
| 477 | bool DisassembleBinary(std::string file, std::string* error_msg) { |
| 478 | std::vector<std::string> args; |
| 479 | |
| 480 | args.push_back(GetDisassembleCommand()); |
| 481 | args.push_back(file); |
| 482 | args.push_back("| sed -n \'/<.data>/,$p\' | sed -e \'s/.*://\'"); |
| 483 | args.push_back(">"); |
| 484 | args.push_back(file+".dis"); |
| 485 | std::string cmd = Join(args, ' '); |
| 486 | |
| 487 | args.clear(); |
| 488 | args.push_back("/bin/sh"); |
| 489 | args.push_back("-c"); |
| 490 | args.push_back(cmd); |
| 491 | |
| 492 | return Exec(args, error_msg); |
| 493 | } |
| 494 | |
| 495 | std::string WriteToFile(std::vector<uint8_t>& buffer, std::string test_name) { |
| 496 | std::string file_name = GetTmpnam() + std::string("---") + test_name; |
| 497 | const char* data = reinterpret_cast<char*>(buffer.data()); |
| 498 | std::ofstream s_out(file_name + ".o"); |
| 499 | s_out.write(data, buffer.size()); |
| 500 | s_out.close(); |
| 501 | return file_name + ".o"; |
| 502 | } |
| 503 | |
| 504 | bool CompareFiles(std::string f1, std::string f2) { |
| 505 | std::ifstream f1_in(f1); |
| 506 | std::ifstream f2_in(f2); |
| 507 | |
| 508 | bool result = std::equal(std::istreambuf_iterator<char>(f1_in), |
| 509 | std::istreambuf_iterator<char>(), |
| 510 | std::istreambuf_iterator<char>(f2_in)); |
| 511 | |
| 512 | f1_in.close(); |
| 513 | f2_in.close(); |
| 514 | |
| 515 | return result; |
| 516 | } |
| 517 | |
| 518 | // Compile the given assembly code and extract the binary, if possible. Put result into res. |
| 519 | bool Compile(std::string assembly_code, NativeAssemblerResult* res, std::string test_name) { |
| 520 | res->ok = false; |
| 521 | res->code.reset(nullptr); |
| 522 | |
| 523 | res->base_name = GetTmpnam() + std::string("---") + test_name; |
| 524 | |
| 525 | // TODO: Lots of error checking. |
| 526 | |
| 527 | std::ofstream s_out(res->base_name + ".S"); |
| 528 | s_out << assembly_code; |
| 529 | s_out.close(); |
| 530 | |
| 531 | if (!Assemble((res->base_name + ".S").c_str(), (res->base_name + ".o").c_str(), |
| 532 | &res->error_msg)) { |
| 533 | res->error_msg = "Could not compile."; |
| 534 | return false; |
| 535 | } |
| 536 | |
| 537 | std::string odump = Objdump(res->base_name + ".o"); |
| 538 | if (odump.length() == 0) { |
| 539 | res->error_msg = "Objdump failed."; |
| 540 | return false; |
| 541 | } |
| 542 | |
| 543 | std::istringstream iss(odump); |
| 544 | std::istream_iterator<std::string> start(iss); |
| 545 | std::istream_iterator<std::string> end; |
| 546 | std::vector<std::string> tokens(start, end); |
| 547 | |
| 548 | if (tokens.size() < OBJDUMP_SECTION_LINE_MIN_TOKENS) { |
| 549 | res->error_msg = "Objdump output not recognized: too few tokens."; |
| 550 | return false; |
| 551 | } |
| 552 | |
| 553 | if (tokens[1] != ".text") { |
| 554 | res->error_msg = "Objdump output not recognized: .text not second token."; |
| 555 | return false; |
| 556 | } |
| 557 | |
| 558 | std::string lengthToken = "0x" + tokens[2]; |
| 559 | std::istringstream(lengthToken) >> std::hex >> res->length; |
| 560 | |
| 561 | std::string offsetToken = "0x" + tokens[5]; |
| 562 | uintptr_t offset; |
| 563 | std::istringstream(offsetToken) >> std::hex >> offset; |
| 564 | |
| 565 | std::ifstream obj(res->base_name + ".o"); |
| 566 | obj.seekg(offset); |
| 567 | res->code.reset(new std::vector<uint8_t>(res->length)); |
| 568 | obj.read(reinterpret_cast<char*>(&(*res->code)[0]), res->length); |
| 569 | obj.close(); |
| 570 | |
| 571 | res->ok = true; |
| 572 | return true; |
| 573 | } |
| 574 | |
| 575 | // Remove temporary files. |
| 576 | void Clean(const NativeAssemblerResult* res) { |
| 577 | std::remove((res->base_name + ".S").c_str()); |
| 578 | std::remove((res->base_name + ".o").c_str()); |
| 579 | std::remove((res->base_name + ".o.dump").c_str()); |
| 580 | } |
| 581 | |
| 582 | // Check whether file exists. Is used for commands, so strips off any parameters: anything after |
| 583 | // the first space. We skip to the last slash for this, so it should work with directories with |
| 584 | // spaces. |
| 585 | static bool FileExists(std::string file) { |
| 586 | if (file.length() == 0) { |
| 587 | return false; |
| 588 | } |
| 589 | |
| 590 | // Need to strip any options. |
| 591 | size_t last_slash = file.find_last_of('/'); |
| 592 | if (last_slash == std::string::npos) { |
| 593 | // No slash, start looking at the start. |
| 594 | last_slash = 0; |
| 595 | } |
| 596 | size_t space_index = file.find(' ', last_slash); |
| 597 | |
| 598 | if (space_index == std::string::npos) { |
| 599 | std::ifstream infile(file.c_str()); |
| 600 | return infile.good(); |
| 601 | } else { |
| 602 | std::string copy = file.substr(0, space_index - 1); |
| 603 | |
| 604 | struct stat buf; |
| 605 | return stat(copy.c_str(), &buf) == 0; |
| 606 | } |
| 607 | } |
| 608 | |
| 609 | static std::string GetGCCRootPath() { |
| 610 | return "prebuilts/gcc/linux-x86"; |
| 611 | } |
| 612 | |
| 613 | static std::string GetRootPath() { |
| 614 | // 1) Check ANDROID_BUILD_TOP |
| 615 | char* build_top = getenv("ANDROID_BUILD_TOP"); |
| 616 | if (build_top != nullptr) { |
| 617 | return std::string(build_top) + "/"; |
| 618 | } |
| 619 | |
| 620 | // 2) Do cwd |
| 621 | char temp[1024]; |
| 622 | return getcwd(temp, 1024) ? std::string(temp) + "/" : std::string(""); |
| 623 | } |
| 624 | |
| 625 | std::string FindTool(std::string tool_name) { |
| 626 | // Find the current tool. Wild-card pattern is "arch-string*tool-name". |
| 627 | std::string gcc_path = GetRootPath() + GetGCCRootPath(); |
| 628 | std::vector<std::string> args; |
| 629 | args.push_back("find"); |
| 630 | args.push_back(gcc_path); |
| 631 | args.push_back("-name"); |
| 632 | args.push_back(GetArchitectureString() + "*" + tool_name); |
| 633 | args.push_back("|"); |
| 634 | args.push_back("sort"); |
| 635 | args.push_back("|"); |
| 636 | args.push_back("tail"); |
| 637 | args.push_back("-n"); |
| 638 | args.push_back("1"); |
| 639 | std::string tmp_file = GetTmpnam(); |
| 640 | args.push_back(">"); |
| 641 | args.push_back(tmp_file); |
| 642 | std::string sh_args = Join(args, ' '); |
| 643 | |
| 644 | args.clear(); |
| 645 | args.push_back("/bin/sh"); |
| 646 | args.push_back("-c"); |
| 647 | args.push_back(sh_args); |
| 648 | |
| 649 | std::string error_msg; |
| 650 | if (!Exec(args, &error_msg)) { |
| 651 | EXPECT_TRUE(false) << error_msg; |
| 652 | return ""; |
| 653 | } |
| 654 | |
| 655 | std::ifstream in(tmp_file.c_str()); |
| 656 | std::string line; |
| 657 | if (!std::getline(in, line)) { |
| 658 | in.close(); |
| 659 | std::remove(tmp_file.c_str()); |
| 660 | return ""; |
| 661 | } |
| 662 | in.close(); |
| 663 | std::remove(tmp_file.c_str()); |
| 664 | return line; |
| 665 | } |
| 666 | |
| 667 | // Use a consistent tmpnam, so store it. |
| 668 | std::string GetTmpnam() { |
| 669 | if (tmpnam_.length() == 0) { |
| 670 | tmpnam_ = std::string(tmpnam(nullptr)); |
| 671 | } |
| 672 | return tmpnam_; |
| 673 | } |
| 674 | |
| 675 | UniquePtr<Ass> assembler_; |
| 676 | |
| 677 | std::string resolved_assembler_cmd_; |
| 678 | std::string resolved_objdump_cmd_; |
| 679 | std::string resolved_disassemble_cmd_; |
| 680 | std::string tmpnam_; |
| 681 | |
| 682 | static constexpr size_t OBJDUMP_SECTION_LINE_MIN_TOKENS = 6; |
| 683 | }; |
| 684 | |
| 685 | } // namespace art |
| 686 | |
| 687 | #endif // ART_COMPILER_UTILS_ASSEMBLER_TEST_H_ |