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AsmParser: Generalize location comment parsing to make it easier to add support for more tags

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This commit is contained in:
Kamil Śliwak 2021-09-08 16:08:05 +02:00
parent aa156ab6c7
commit 14396c207c
3 changed files with 70 additions and 34 deletions
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48
libyul/AsmParser.cpp
View File

@ -131,31 +131,53 @@ void Parser::fetchSourceLocationFromComment()
return;
static regex const tagRegex = regex(
R"~~(\s*@src\s+)~~" // tag: @src
R"~~((-1|\d+):(-1|\d+):(-1|\d+)(?:\s+|$))~~", // index and location, e.g.: 1:234:-1
R"~~(\s*(@[a-zA-Z0-9\-_]+)(?:\s+|$))~~", // tag, e.g: @src
regex_constants::ECMAScript | regex_constants::optimize
);
static regex const srcTagArgsRegex = regex(
R"~~(^(-1|\d+):(-1|\d+):(-1|\d+)(?:\s+|$))~~", // index and location, e.g.: 1:234:-1
regex_constants::ECMAScript | regex_constants::optimize
);
string const commentLiteral = m_scanner->currentCommentLiteral();
SourceLocation const commentLocation = m_scanner->currentCommentLocation();
auto from = sregex_iterator(commentLiteral.begin(), commentLiteral.end(), tagRegex);
auto to = sregex_iterator();
smatch tagMatch;
string::const_iterator position = commentLiteral.begin();
for (auto const& tagMatch: ranges::make_subrange(from, to))
while (regex_search(position, commentLiteral.end(), tagMatch, tagRegex))
{
solAssert(tagMatch.size() == 4, "");
solAssert(tagMatch.size() == 2, "");
position += tagMatch.position() + tagMatch.length();
optional<int> const sourceIndex = toInt(tagMatch[1].str());
optional<int> const start = toInt(tagMatch[2].str());
optional<int> const end = toInt(tagMatch[3].str());
if (tagMatch[1] == "@src")
{
smatch srcTagArgsMatch;
if (!regex_search(position, commentLiteral.end(), srcTagArgsMatch, srcTagArgsRegex))
{
m_errorReporter.syntaxError(
8387_error,
commentLocation,
"Invalid values in source location mapping. Could not parse location specification."
);
// If the arguments to @src are malformed, we don't know where they end so we can't continue.
return;
}
solAssert(srcTagArgsMatch.size() == 4, "");
position += srcTagArgsMatch.position() + srcTagArgsMatch.length();
optional<int> const sourceIndex = toInt(srcTagArgsMatch[1].str());
optional<int> const start = toInt(srcTagArgsMatch[2].str());
optional<int> const end = toInt(srcTagArgsMatch[3].str());
auto const commentLocation = m_scanner->currentCommentLocation();
m_debugDataOverride = DebugData::create();
if (!sourceIndex.has_value() || !start.has_value() || !end.has_value())
m_errorReporter.syntaxError(
6367_error,
commentLocation,
"Invalid value in source location mapping. Could not parse location specification."
"Invalid value in source location mapping. "
"Expected non-negative integer values or -1 for source index and location."
);
else if (sourceIndex == -1)
m_debugDataOverride = DebugData::create(SourceLocation{start.value(), end.value(), nullptr});
@ -172,6 +194,10 @@ void Parser::fetchSourceLocationFromComment()
m_debugDataOverride = DebugData::create(SourceLocation{start.value(), end.value(), move(sourceName)});
}
}
else
// Ignore unrecognized tags.
continue;
}
}
Block Parser::parseBlock()

1
scripts/error_codes.py
View File

@ -194,6 +194,7 @@ def examine_id_coverage(top_dir, source_id_to_file_names, new_ids_only=False):
"9804", # Tested in test/libyul/ObjectParser.cpp.
"2674",
"6367",
"8387",
"3805", # "This is a pre-release compiler version, please do not use it in production."
# The warning may or may not exist in a compiler build.
"4591", # "There are more than 256 warnings. Ignoring the rest."

17
test/libyul/Parser.cpp
View File

@ -516,7 +516,10 @@ BOOST_AUTO_TEST_CASE(customSourceLocations_invalid_suffix)
)";
EVMDialectTyped const& dialect = EVMDialectTyped::instance(EVMVersion{});
shared_ptr<Block> result = parse(sourceText, dialect, reporter);
BOOST_REQUIRE(!!result && errorList.size() == 0);
BOOST_REQUIRE(!!result);
BOOST_REQUIRE(errorList.size() == 1);
BOOST_TEST(errorList[0]->type() == Error::Type::SyntaxError);
BOOST_TEST(errorList[0]->errorId() == 8387_error);
CHECK_LOCATION(result->debugData->location, "", -1, -1);
}
@ -558,7 +561,10 @@ BOOST_AUTO_TEST_CASE(customSourceLocations_non_integer)
)";
EVMDialectTyped const& dialect = EVMDialectTyped::instance(EVMVersion{});
shared_ptr<Block> result = parse(sourceText, dialect, reporter);
BOOST_REQUIRE(!!result && errorList.size() == 0);
BOOST_REQUIRE(!!result);
BOOST_REQUIRE(errorList.size() == 1);
BOOST_TEST(errorList[0]->type() == Error::Type::SyntaxError);
BOOST_TEST(errorList[0]->errorId() == 8387_error);
CHECK_LOCATION(result->debugData->location, "", -1, -1);
}
@ -611,8 +617,11 @@ BOOST_AUTO_TEST_CASE(customSourceLocations_two_locations_no_whitespace)
)";
EVMDialectTyped const& dialect = EVMDialectTyped::instance(EVMVersion{});
shared_ptr<Block> result = parse(sourceText, dialect, reporter);
BOOST_REQUIRE(!!result && errorList.size() == 0);
CHECK_LOCATION(result->debugData->location, "source1", 333, 444);
BOOST_REQUIRE(!!result);
BOOST_REQUIRE(errorList.size() == 1);
BOOST_TEST(errorList[0]->type() == Error::Type::SyntaxError);
BOOST_TEST(errorList[0]->errorId() == 8387_error);
CHECK_LOCATION(result->debugData->location, "", -1, -1);
}
BOOST_AUTO_TEST_CASE(customSourceLocations_leading_trailing_whitespace)