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[llvm-cov] Get rid of all invalid filename references

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We used to append filenames into a vector of std::string, and then
append a reference to each string into a separate vector. This made it
easier to work with the getUniqueSourceFiles API. But it's buggy.

std::string has a small-string optimization, so you can't expect to
capture a reference to one if you're copying it into a growing vector.
Add a test that triggers this invalid reference to std::string scenario,
and kill the issue with fire by just using ArrayRef<std::string>
everywhere.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@282281 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Vedant Kumar 2016-09-23 18:57:32 +00:00
parent c36f315edc
commit fd066351a5
10 changed files with 43 additions and 33 deletions
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18
test/tools/llvm-cov/scan-directory.test
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@ -2,8 +2,18 @@ RUN: mkdir -p %t/a/b/
RUN: echo "" > %t/a/b/c.tmp
RUN: echo "" > %t/a/d.tmp
RUN: llvm-cov show /dev/null -instr-profile /dev/null -dump-collected-paths %t | FileCheck %s
RUN: llvm-cov show /dev/null -instr-profile /dev/null -dump-collected-paths %t/a/b/c.tmp %t/a/d.tmp | FileCheck %s
RUN: llvm-cov show /dev/null -instr-profile /dev/null -dump-collected-paths %t | FileCheck %s --check-prefix=REAL
RUN: llvm-cov show /dev/null -instr-profile /dev/null -dump-collected-paths %t/a/b/c.tmp %t/a/d.tmp | FileCheck %s --check-prefix=REAL
CHECK-DAG: {{.*}}c.tmp
CHECK-DAG: {{.*}}d.tmp
REAL-DAG: {{.*}}c.tmp
REAL-DAG: {{.*}}d.tmp
RUN: llvm-cov show /dev/null -instr-profile /dev/null -dump-collected-paths -filename-equivalence %t a b c d e f | FileCheck %s --check-prefix=EQUIV
EQUIV-DAG: {{.*}}c.tmp
EQUIV-DAG: {{.*}}d.tmp
EQUIV-DAG: a
EQUIV-DAG: b
EQUIV-DAG: c
EQUIV-DAG: d
EQUIV-DAG: e
EQUIV-DAG: f

22
tools/llvm-cov/CodeCoverage.cpp
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@ -64,7 +64,8 @@ private:
/// \brief Print the warning message to the error output stream.
void warning(const Twine &Message, StringRef Whence = "");
/// \brief Copy \p Path into the list of input source files.
/// \brief Convert \p Path into an absolute path and append it to the list
/// of collected paths.
void addCollectedPath(const std::string &Path);
/// \brief If \p Path is a regular file, collect the path. If it's a
@ -116,7 +117,7 @@ private:
std::string PGOFilename;
/// A list of input source files.
std::vector<StringRef> SourceFiles;
std::vector<std::string> SourceFiles;
/// Whether or not we're in -filename-equivalence mode.
bool CompareFilenamesOnly;
@ -131,9 +132,6 @@ private:
/// A cache for demangled symbol names.
StringMap<std::string> DemangledNames;
/// File paths (absolute, or otherwise) to input source files.
std::vector<std::string> CollectedPaths;
/// Errors and warnings which have not been printed.
std::mutex ErrsLock;
@ -168,7 +166,7 @@ void CodeCoverageTool::warning(const Twine &Message, StringRef Whence) {
void CodeCoverageTool::addCollectedPath(const std::string &Path) {
if (CompareFilenamesOnly) {
CollectedPaths.push_back(Path);
SourceFiles.emplace_back(Path);
} else {
SmallString<128> EffectivePath(Path);
if (std::error_code EC = sys::fs::make_absolute(EffectivePath)) {
@ -176,10 +174,8 @@ void CodeCoverageTool::addCollectedPath(const std::string &Path) {
return;
}
sys::path::remove_dots(EffectivePath, /*remove_dot_dots=*/true);
CollectedPaths.push_back(EffectivePath.str());
SourceFiles.emplace_back(EffectivePath.str());
}
SourceFiles.emplace_back(CollectedPaths.back());
}
void CodeCoverageTool::collectPaths(const std::string &Path) {
@ -597,7 +593,7 @@ int CodeCoverageTool::run(Command Cmd, int argc, const char **argv) {
collectPaths(File);
if (DebugDumpCollectedPaths) {
for (StringRef SF : SourceFiles)
for (const std::string &SF : SourceFiles)
outs() << SF << '\n';
::exit(0);
}
@ -751,11 +747,11 @@ int CodeCoverageTool::show(int argc, const char **argv,
ThreadCount = std::thread::hardware_concurrency();
ThreadPool Pool(ThreadCount);
for (StringRef SourceFile : SourceFiles) {
Pool.async([this, SourceFile, &Coverage, &Printer, ShowFilenames] {
for (const std::string &SourceFile : SourceFiles) {
Pool.async([this, &SourceFile, &Coverage, &Printer, ShowFilenames] {
auto View = createSourceFileView(SourceFile, *Coverage);
if (!View) {
warning("The file '" + SourceFile.str() + "' isn't covered.");
warning("The file '" + SourceFile + "' isn't covered.");
return;
}

6
tools/llvm-cov/CoverageExporterJson.cpp
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@ -175,7 +175,9 @@ class CoverageExporterJson {
emitDictKey("files");
FileCoverageSummary Totals = FileCoverageSummary("Totals");
std::vector<StringRef> SourceFiles = Coverage.getUniqueSourceFiles();
std::vector<std::string> SourceFiles;
for (StringRef SF : Coverage.getUniqueSourceFiles())
SourceFiles.emplace_back(SF);
auto FileReports =
CoverageReport::prepareFileReports(Coverage, Totals, SourceFiles);
renderFiles(SourceFiles, FileReports);
@ -235,7 +237,7 @@ class CoverageExporterJson {
}
/// \brief Render an array of all the source files, also pass back a Summary.
void renderFiles(ArrayRef<StringRef> SourceFiles,
void renderFiles(ArrayRef<std::string> SourceFiles,
ArrayRef<FileCoverageSummary> FileReports) {
// Start List of Files.
emitArrayStart();

12
tools/llvm-cov/CoverageReport.cpp
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@ -120,7 +120,7 @@ raw_ostream::Colors determineCoveragePercentageColor(const T &Info) {
/// \brief Determine the length of the longest common prefix of the strings in
/// \p Strings.
unsigned getLongestCommonPrefixLen(ArrayRef<StringRef> Strings) {
unsigned getLongestCommonPrefixLen(ArrayRef<std::string> Strings) {
unsigned LCP = Strings[0].size();
for (unsigned I = 1, E = Strings.size(); LCP > 0 && I < E; ++I) {
auto Mismatch =
@ -215,7 +215,7 @@ void CoverageReport::render(const FunctionCoverageSummary &Function,
OS << "\n";
}
void CoverageReport::renderFunctionReports(ArrayRef<StringRef> Files,
void CoverageReport::renderFunctionReports(ArrayRef<std::string> Files,
raw_ostream &OS) {
bool isFirst = true;
for (StringRef Filename : Files) {
@ -261,7 +261,7 @@ void CoverageReport::renderFunctionReports(ArrayRef<StringRef> Files,
std::vector<FileCoverageSummary>
CoverageReport::prepareFileReports(const coverage::CoverageMapping &Coverage,
FileCoverageSummary &Totals,
ArrayRef<StringRef> Files) {
ArrayRef<std::string> Files) {
std::vector<FileCoverageSummary> FileReports;
unsigned LCP = 0;
if (Files.size() > 1)
@ -298,12 +298,14 @@ CoverageReport::prepareFileReports(const coverage::CoverageMapping &Coverage,
}
void CoverageReport::renderFileReports(raw_ostream &OS) const {
std::vector<StringRef> UniqueSourceFiles = Coverage.getUniqueSourceFiles();
std::vector<std::string> UniqueSourceFiles;
for (StringRef SF : Coverage.getUniqueSourceFiles())
UniqueSourceFiles.emplace_back(SF.str());
renderFileReports(OS, UniqueSourceFiles);
}
void CoverageReport::renderFileReports(raw_ostream &OS,
ArrayRef<StringRef> Files) const {
ArrayRef<std::string> Files) const {
FileCoverageSummary Totals("TOTAL");
auto FileReports = prepareFileReports(Coverage, Totals, Files);

6
tools/llvm-cov/CoverageReport.h
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@ -32,18 +32,18 @@ public:
const coverage::CoverageMapping &Coverage)
: Options(Options), Coverage(Coverage) {}
void renderFunctionReports(ArrayRef<StringRef> Files, raw_ostream &OS);
void renderFunctionReports(ArrayRef<std::string> Files, raw_ostream &OS);
/// Prepare file reports for the files specified in \p Files.
static std::vector<FileCoverageSummary>
prepareFileReports(const coverage::CoverageMapping &Coverage,
FileCoverageSummary &Totals, ArrayRef<StringRef> Files);
FileCoverageSummary &Totals, ArrayRef<std::string> Files);
/// Render file reports for every unique file in the coverage mapping.
void renderFileReports(raw_ostream &OS) const;
/// Render file reports for the files specified in \p Files.
void renderFileReports(raw_ostream &OS, ArrayRef<StringRef> Files) const;
void renderFileReports(raw_ostream &OS, ArrayRef<std::string> Files) const;
};
} // end namespace llvm

2
tools/llvm-cov/SourceCoverageView.h
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@ -142,7 +142,7 @@ public:
virtual void closeViewFile(OwnedStream OS) = 0;
/// \brief Create an index which lists reports for the given source files.
virtual Error createIndexFile(ArrayRef<StringRef> SourceFiles,
virtual Error createIndexFile(ArrayRef<std::string> SourceFiles,
const coverage::CoverageMapping &Coverage) = 0;
/// @}

2
tools/llvm-cov/SourceCoverageViewHTML.cpp
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@ -347,7 +347,7 @@ void CoveragePrinterHTML::emitFileSummary(raw_ostream &OS, StringRef SF,
}
Error CoveragePrinterHTML::createIndexFile(
ArrayRef<StringRef> SourceFiles,
ArrayRef<std::string> SourceFiles,
const coverage::CoverageMapping &Coverage) {
// Emit the default stylesheet.
auto CSSOrErr = createOutputStream("style", "css", /*InToplevel=*/true);

2
tools/llvm-cov/SourceCoverageViewHTML.h
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@ -28,7 +28,7 @@ public:
void closeViewFile(OwnedStream OS) override;
Error createIndexFile(ArrayRef<StringRef> SourceFiles,
Error createIndexFile(ArrayRef<std::string> SourceFiles,
const coverage::CoverageMapping &Coverage) override;
CoveragePrinterHTML(const CoverageViewOptions &Opts)

4
tools/llvm-cov/SourceCoverageViewText.cpp
View File

@ -29,7 +29,7 @@ void CoveragePrinterText::closeViewFile(OwnedStream OS) {
}
Error CoveragePrinterText::createIndexFile(
ArrayRef<StringRef> SourceFiles,
ArrayRef<std::string> SourceFiles,
const coverage::CoverageMapping &Coverage) {
auto OSOrErr = createOutputStream("index", "txt", /*InToplevel=*/true);
if (Error E = OSOrErr.takeError())
@ -38,7 +38,7 @@ Error CoveragePrinterText::createIndexFile(
raw_ostream &OSRef = *OS.get();
CoverageReport Report(Opts, Coverage);
Report.renderFileReports(OSRef);
Report.renderFileReports(OSRef, SourceFiles);
Opts.colored_ostream(OSRef, raw_ostream::CYAN) << "\n"
<< Opts.getLLVMVersionString();

2
tools/llvm-cov/SourceCoverageViewText.h
View File

@ -26,7 +26,7 @@ public:
void closeViewFile(OwnedStream OS) override;
Error createIndexFile(ArrayRef<StringRef> SourceFiles,
Error createIndexFile(ArrayRef<std::string> SourceFiles,
const coverage::CoverageMapping &Coverage) override;
CoveragePrinterText(const CoverageViewOptions &Opts)