caio/clang-p2996
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Revert "[clang-format][NFC] Clean up fillRanges() in ClangFormat.cpp (#143236)"

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This reverts commit 897ccddcc3. It
introduced a bug when formatting multiple files in one go. When a
shorter file is passed after a longer one, a stale length from the
previous file seems to be used, triggering an "invalid length (...) is
outside the file" error.
This commit is contained in:
Jorge Gorbe Moya
2025-06-09 14:42:32 -07:00
parent 28b753b185
commit 3c02150f02
1 changed files with 28 additions and 21 deletions
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49
clang/tools/clang-format/ClangFormat.cpp
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@@ -244,17 +244,17 @@ static bool fillRanges(MemoryBuffer *Code,
DiagnosticsEngine Diagnostics(
IntrusiveRefCntPtr<DiagnosticIDs>(new DiagnosticIDs), DiagOpts);
SourceManager Sources(Diagnostics, Files);
const auto ID = createInMemoryFile("<irrelevant>", *Code, Sources, Files,
InMemoryFileSystem.get());
FileID ID = createInMemoryFile("<irrelevant>", *Code, Sources, Files,
InMemoryFileSystem.get());
if (!LineRanges.empty()) {
if (!Offsets.empty() || !Lengths.empty()) {
errs() << "error: cannot use -lines with -offset/-length\n";
return true;
}
for (const auto &LineRange : LineRanges) {
for (unsigned i = 0, e = LineRanges.size(); i < e; ++i) {
unsigned FromLine, ToLine;
if (parseLineRange(LineRange, FromLine, ToLine)) {
if (parseLineRange(LineRanges[i], FromLine, ToLine)) {
errs() << "error: invalid <start line>:<end line> pair\n";
return true;
}
@@ -266,12 +266,12 @@ static bool fillRanges(MemoryBuffer *Code,
errs() << "error: start line should not exceed end line\n";
return true;
}
const auto Start = Sources.translateLineCol(ID, FromLine, 1);
const auto End = Sources.translateLineCol(ID, ToLine, UINT_MAX);
SourceLocation Start = Sources.translateLineCol(ID, FromLine, 1);
SourceLocation End = Sources.translateLineCol(ID, ToLine, UINT_MAX);
if (Start.isInvalid() || End.isInvalid())
return true;
const auto Offset = Sources.getFileOffset(Start);
const auto Length = Sources.getFileOffset(End) - Offset;
unsigned Offset = Sources.getFileOffset(Start);
unsigned Length = Sources.getFileOffset(End) - Offset;
Ranges.push_back(tooling::Range(Offset, Length));
}
return false;
@@ -279,25 +279,32 @@ static bool fillRanges(MemoryBuffer *Code,
if (Offsets.empty())
Offsets.push_back(0);
if (Offsets.size() == 1 && Lengths.empty()) {
Lengths.push_back(Sources.getFileOffset(Sources.getLocForEndOfFile(ID)) -
Offsets[0]);
} else if (Offsets.size() != Lengths.size()) {
if (Offsets.size() != Lengths.size() &&
!(Offsets.size() == 1 && Lengths.empty())) {
errs() << "error: number of -offset and -length arguments must match.\n";
return true;
}
for (unsigned I = 0, E = Offsets.size(); I < E; ++I) {
const auto Offset = Offsets[I];
if (Offset >= Code->getBufferSize()) {
errs() << "error: offset " << Offset << " is outside the file\n";
for (unsigned i = 0, e = Offsets.size(); i != e; ++i) {
if (Offsets[i] >= Code->getBufferSize()) {
errs() << "error: offset " << Offsets[i] << " is outside the file\n";
return true;
}
const auto Length = Lengths[I];
if (Offset + Length > Code->getBufferSize()) {
errs() << "error: invalid length " << Length << ", offset + length ("
<< Offset + Length << ") is outside the file.\n";
return true;
SourceLocation Start =
Sources.getLocForStartOfFile(ID).getLocWithOffset(Offsets[i]);
SourceLocation End;
if (i < Lengths.size()) {
if (Offsets[i] + Lengths[i] > Code->getBufferSize()) {
errs() << "error: invalid length " << Lengths[i]
<< ", offset + length (" << Offsets[i] + Lengths[i]
<< ") is outside the file.\n";
return true;
}
End = Start.getLocWithOffset(Lengths[i]);
} else {
End = Sources.getLocForEndOfFile(ID);
}
unsigned Offset = Sources.getFileOffset(Start);
unsigned Length = Sources.getFileOffset(End) - Offset;
Ranges.push_back(tooling::Range(Offset, Length));
}
return false;