disasm-regex-helper.cc 9.21 KB
Newer Older
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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291
// Copyright 2019 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "test/cctest/disasm-regex-helper.h"

#include "src/api/api-inl.h"
#include "src/diagnostics/disassembler.h"
#include "src/objects/objects-inl.h"
#include "test/cctest/cctest.h"

namespace v8 {
namespace internal {

namespace {
std::string DisassembleFunction(const char* function) {
  v8::Local<v8::Context> context = CcTest::isolate()->GetCurrentContext();
  Handle<JSFunction> f = Handle<JSFunction>::cast(
      v8::Utils::OpenHandle(*v8::Local<v8::Function>::Cast(
          CcTest::global()->Get(context, v8_str(function)).ToLocalChecked())));

  Address begin = f->code().raw_instruction_start();
  Address end = f->code().raw_instruction_end();
  Isolate* isolate = CcTest::i_isolate();
  std::ostringstream os;
  Disassembler::Decode(isolate, &os, reinterpret_cast<byte*>(begin),
                       reinterpret_cast<byte*>(end),
                       CodeReference(handle(f->code(), isolate)));
  return os.str();
}

}  // namespace

bool CheckDisassemblyRegexPatterns(
    const char* function_name, const std::vector<std::string>& patterns_array) {
  std::istringstream reader(DisassembleFunction(function_name));
  size_t size = patterns_array.size();
  DCHECK_GT(size, 0);

  std::smatch match;
  std::string line;
  RegexParser parser;
  const std::string& first_pattern = patterns_array[0];
  while (std::getline(reader, line)) {
    RegexParser::Status status = parser.ProcessPattern(line, first_pattern);
    if (status == RegexParser::Status::kSuccess) {
      CHECK(std::getline(reader, line));
      for (size_t i = 1; i < size; i++) {
        const std::string& pattern = patterns_array[i];
        status = parser.ProcessPattern(line, pattern);
        if (status != RegexParser::Status::kSuccess) {
          std::cout << "Pattern \"" << pattern << "\" not found" << std::endl;
          std::cout << "Line: \"" << line << "\":" << std::endl;
          parser.PrintSymbols(std::cout);
          return false;
        }
        CHECK(std::getline(reader, line));
      }

      return true;
    }
  }
  return false;
}

namespace {
void RegexCheck(
    const std::vector<std::string>& inputs,
    const std::vector<std::string>& patterns,
    RegexParser::Status expected_status,
    std::function<void(const RegexParser&)> func = [](const RegexParser&) {}) {
  size_t size = patterns.size();
  CHECK_EQ(size, inputs.size());
  RegexParser parser;
  RegexParser::Status status;
  size_t i = 0;
  for (; i < size - 1; i++) {
    const std::string& line = inputs[i];
    const std::string& pattern = patterns[i];
    status = parser.ProcessPattern(line, pattern);
    CHECK_EQ(status, RegexParser::Status::kSuccess);
  }
  const std::string& line = inputs[i];
  const std::string& pattern = patterns[i];
  status = parser.ProcessPattern(line, pattern);

  if (status != expected_status) {
    parser.PrintSymbols(std::cout);
  }
  CHECK_EQ(status, expected_status);
  func(parser);
}

// Check a line against a pattern.
void RegexCheckOne(
    const std::string& line, const std::string& pattern,
    RegexParser::Status expected_status,
    std::function<void(const RegexParser&)> func = [](const RegexParser&) {}) {
  RegexParser parser;
  RegexParser::Status status = parser.ProcessPattern(line, pattern);
  CHECK_EQ(status, expected_status);
  func(parser);
}

void TestSymbolValue(const std::string& sym_name, const std::string& value,
                     const RegexParser& p) {
  CHECK(p.IsSymbolDefined(sym_name));
  CHECK_EQ(p.GetSymbolMatchedValue(sym_name).compare(value), 0);
}

}  // namespace

// clang-format off
TEST(RegexParserSingleLines) {
  //
  // Simple one-liners for found/not found.
  //
  RegexCheckOne(" a b a b c a",
                "a b c",
                RegexParser::Status::kSuccess);

  RegexCheckOne(" a b a bc a",
                "a b c",
                RegexParser::Status::kNotMatched);

  RegexCheckOne("aaabbaaa",
                "ab.*?a",
                RegexParser::Status::kSuccess);

  RegexCheckOne("aaabbaa",
                "^(?:aa+|b)+$",
                RegexParser::Status::kSuccess);

  RegexCheckOne("aaabba",
                "^(?:aa+|b)+$",
                RegexParser::Status::kNotMatched);

  RegexCheckOne("(aaa)",
                "\\(a+\\)",
                RegexParser::Status::kSuccess);

  RegexCheckOne("r19 qwerty",
                "r<<Def:[0-9]+>>",
                RegexParser::Status::kSuccess,
                [] (const RegexParser& p) {
                  TestSymbolValue("Def", "19", p);
                });

  RegexCheckOne("r19 qwerty",
                "r<<Def:[a-z]+>>",
                RegexParser::Status::kSuccess,
                [] (const RegexParser& p) {
                  TestSymbolValue("Def", "ty", p);
                });

  // Backreference/submatch groups are forbidden.
  RegexCheckOne("aaabba",
                "((aa+)|b)+?",
                RegexParser::Status::kWrongPattern);

  // Using passive groups.
  RegexCheckOne("aaabba",
                "(?:(?:aa+)|b)+?",
                RegexParser::Status::kSuccess);

  //
  // Symbol definitions.
  //
  RegexCheckOne("r19 r20",
                "r<<Def:19>>",
                RegexParser::Status::kSuccess,
                [] (const RegexParser& p) {
                  TestSymbolValue("Def", "19", p);
                });

  RegexCheckOne("r19 r20",
                "r<<Def:[0-9]+>>",
                RegexParser::Status::kSuccess,
                [] (const RegexParser& p) {
                  TestSymbolValue("Def", "19", p);
                });

  RegexCheckOne("r19 r20",
                "r<<Def0:[0-9]+>>.*?r<<Def1:[0-9]+>>",
                RegexParser::Status::kSuccess,
                [] (const RegexParser& p) {
                  TestSymbolValue("Def0", "19", p);
                  TestSymbolValue("Def1", "20", p);
                });

  RegexCheckOne("r19 r20",
                "r<<Def0:[0-9]+>>.*?r[0-9]",
                RegexParser::Status::kSuccess,
                [] (const RegexParser& p) {
                  TestSymbolValue("Def0", "19", p);
                });

  // Checks that definitions are not committed unless the pattern is matched.
  RegexCheckOne("r19",
                "r<<Def0:[0-9]+>>.*?r<<Def1:[0-9]+>>",
                RegexParser::Status::kNotMatched,
                [] (const RegexParser& p) {
                  CHECK(!p.IsSymbolDefined("Def0"));
                  CHECK(!p.IsSymbolDefined("Def1"));
                });

  RegexCheckOne("r19 r19 r1",
                "r<<Def0:[0-9]+>>.*?r<<Def0:[0-9]+>> r<<Def1:[0-9]+>>",
                RegexParser::Status::kRedefinition,
                [] (const RegexParser& p) {
                  CHECK(!p.IsSymbolDefined("Def0"));
                  CHECK(!p.IsSymbolDefined("Def1"));
                });

  RegexCheckOne("r19 r1",
                "r<<Def0:[0-9]+>> (r1)",
                RegexParser::Status::kWrongPattern,
                [] (const RegexParser& p) {
                  CHECK(!p.IsSymbolDefined("Def0"));
                });

  //
  // Undefined symbol references.
  //
  RegexCheckOne("r19 r1",
                "r[0-9].*?r<<Undef>>",
                RegexParser::Status::kDefNotFound,
                [] (const RegexParser& p) {
                  CHECK(!p.IsSymbolDefined("Undef"));
                });

  RegexCheckOne("r19 r1",
                "r<<Def0:[0-9]+>>.*?<<Undef>>",
                RegexParser::Status::kDefNotFound,
                [] (const RegexParser& p) {
                  CHECK(!p.IsSymbolDefined("Undef"));
                  CHECK(!p.IsSymbolDefined("Def0"));
                });

  RegexCheckOne("r19 r19",
                "r<<Def0:[0-9]+>>.*?<<Def0>>",
                RegexParser::Status::kDefNotFound,
                [] (const RegexParser& p) {
                  CHECK(!p.IsSymbolDefined("Def0"));
                });
}

TEST(RegexParserMultiLines) {
  RegexCheck({ " a b a b c a",
               " a b a b c a" },
             { "a b c",
               "a b c" },
             RegexParser::Status::kSuccess);

  RegexCheck({ "r16 = r15",
               "r17 = r16" },
             { "<<Def:r[0-9]+>> = r[0-9]+",
               "[0-9]+ = <<Def>>" },
             RegexParser::Status::kSuccess,
             [] (const RegexParser& p) {
               TestSymbolValue("Def", "r16", p);
             });

  RegexCheck({ "r16 = r15 + r13",
               "r17 = r16 + r14",
               "r19 = r14" },
             { "<<Def0:r[0-9]+>> = r[0-9]+",
               "<<Def1:r[0-9]+>> = <<Def0>> \\+ <<Def2:r[0-9]+>>",
               "<<Def3:r[0-9]+>> = <<Def2>>" },
             RegexParser::Status::kSuccess,
             [] (const RegexParser& p) {
               TestSymbolValue("Def0", "r16", p);
               TestSymbolValue("Def1", "r17", p);
               TestSymbolValue("Def2", "r14", p);
               TestSymbolValue("Def3", "r19", p);
             });

  // Constraint is not met for Def (r19 != r16).
  RegexCheck({ "r16 = r15",
               "r17 = r19" },
             { "<<Def:r[0-9]+>> = r[0-9]+",
               "[0-9]+ = <<Def>>" },
             RegexParser::Status::kNotMatched,
             [] (const RegexParser& p) {
               TestSymbolValue("Def", "r16", p);
             });
}
// clang-format on

}  // namespace internal
}  // namespace v8