using namespace llvm;
/// \brief Write samples to a text file.
-bool SampleProfileWriterText::write(StringRef FName, const FunctionSamples &S) {
- if (S.empty())
- return true;
-
- OS << FName << ":" << S.getTotalSamples() << ":" << S.getHeadSamples()
- << "\n";
-
- for (const auto &I : S.getBodySamples()) {
- LineLocation Loc = I.first;
- const SampleRecord &Sample = I.second;
+///
+/// Note: it may be tempting to implement this in terms of
+/// FunctionSamples::print(). Please don't. The dump functionality is intended
+/// for debugging and has no specified form.
+///
+/// The format used here is more structured and deliberate because
+/// it needs to be parsed by the SampleProfileReaderText class.
+std::error_code SampleProfileWriterText::write(StringRef FName,
+ const FunctionSamples &S) {
+ auto &OS = *OutputStream;
+
+ OS << FName << ":" << S.getTotalSamples();
+ if (Indent == 0)
+ OS << ":" << S.getHeadSamples();
+ OS << "\n";
+
+ SampleSorter<LineLocation, SampleRecord> SortedSamples(S.getBodySamples());
+ for (const auto &I : SortedSamples.get()) {
+ LineLocation Loc = I->first;
+ const SampleRecord &Sample = I->second;
+ OS.indent(Indent + 1);
if (Loc.Discriminator == 0)
OS << Loc.LineOffset << ": ";
else
OS << "\n";
}
- return true;
+ SampleSorter<CallsiteLocation, FunctionSamples> SortedCallsiteSamples(
+ S.getCallsiteSamples());
+ Indent += 1;
+ for (const auto &I : SortedCallsiteSamples.get()) {
+ CallsiteLocation Loc = I->first;
+ const FunctionSamples &CalleeSamples = I->second;
+ OS.indent(Indent);
+ if (Loc.Discriminator == 0)
+ OS << Loc.LineOffset << ": ";
+ else
+ OS << Loc.LineOffset << "." << Loc.Discriminator << ": ";
+ if (std::error_code EC = write(Loc.CalleeName, CalleeSamples))
+ return EC;
+ }
+ Indent -= 1;
+
+ return sampleprof_error::success;
}
-SampleProfileWriterBinary::SampleProfileWriterBinary(StringRef F,
- std::error_code &EC)
- : SampleProfileWriter(F, EC, sys::fs::F_None) {
- if (EC)
- return;
+std::error_code SampleProfileWriterBinary::writeNameIdx(StringRef FName) {
+ const auto &ret = NameTable.find(FName);
+ if (ret == NameTable.end())
+ return sampleprof_error::truncated_name_table;
+ encodeULEB128(ret->second, *OutputStream);
+ return sampleprof_error::success;
+}
- // Write the file header.
+void SampleProfileWriterBinary::addName(StringRef FName) {
+ auto NextIdx = NameTable.size();
+ NameTable.insert(std::make_pair(FName, NextIdx));
+}
+
+void SampleProfileWriterBinary::addNames(const FunctionSamples &S) {
+ // Add all the names in indirect call targets.
+ for (const auto &I : S.getBodySamples()) {
+ const SampleRecord &Sample = I.second;
+ for (const auto &J : Sample.getCallTargets())
+ addName(J.first());
+ }
+
+ // Recursively add all the names for inlined callsites.
+ for (const auto &J : S.getCallsiteSamples()) {
+ CallsiteLocation Loc = J.first;
+ const FunctionSamples &CalleeSamples = J.second;
+ addName(Loc.CalleeName);
+ addNames(CalleeSamples);
+ }
+}
+
+std::error_code SampleProfileWriterBinary::writeHeader(
+ const StringMap<FunctionSamples> &ProfileMap) {
+ auto &OS = *OutputStream;
+
+ // Write file magic identifier.
encodeULEB128(SPMagic(), OS);
encodeULEB128(SPVersion(), OS);
+
+ // Generate the name table for all the functions referenced in the profile.
+ for (const auto &I : ProfileMap) {
+ addName(I.first());
+ addNames(I.second);
+ }
+
+ // Write out the name table.
+ encodeULEB128(NameTable.size(), OS);
+ for (auto N : NameTable) {
+ OS << N.first;
+ encodeULEB128(0, OS);
+ }
+
+ return sampleprof_error::success;
}
-/// \brief Write samples to a binary file.
-///
-/// \returns true if the samples were written successfully, false otherwise.
-bool SampleProfileWriterBinary::write(StringRef FName,
- const FunctionSamples &S) {
- if (S.empty())
- return true;
+std::error_code SampleProfileWriterBinary::writeBody(StringRef FName,
+ const FunctionSamples &S) {
+ auto &OS = *OutputStream;
+
+ if (std::error_code EC = writeNameIdx(FName))
+ return EC;
- OS << FName;
- encodeULEB128(0, OS);
encodeULEB128(S.getTotalSamples(), OS);
- encodeULEB128(S.getHeadSamples(), OS);
+
+ // Emit all the body samples.
encodeULEB128(S.getBodySamples().size(), OS);
for (const auto &I : S.getBodySamples()) {
LineLocation Loc = I.first;
encodeULEB128(Sample.getSamples(), OS);
encodeULEB128(Sample.getCallTargets().size(), OS);
for (const auto &J : Sample.getCallTargets()) {
- std::string Callee = J.first();
- unsigned CalleeSamples = J.second;
- OS << Callee;
- encodeULEB128(0, OS);
+ StringRef Callee = J.first();
+ uint64_t CalleeSamples = J.second;
+ if (std::error_code EC = writeNameIdx(Callee))
+ return EC;
encodeULEB128(CalleeSamples, OS);
}
}
- return true;
+ // Recursively emit all the callsite samples.
+ encodeULEB128(S.getCallsiteSamples().size(), OS);
+ for (const auto &J : S.getCallsiteSamples()) {
+ CallsiteLocation Loc = J.first;
+ const FunctionSamples &CalleeSamples = J.second;
+ encodeULEB128(Loc.LineOffset, OS);
+ encodeULEB128(Loc.Discriminator, OS);
+ if (std::error_code EC = writeBody(Loc.CalleeName, CalleeSamples))
+ return EC;
+ }
+
+ return sampleprof_error::success;
}
-/// \brief Create a sample profile writer based on the specified format.
+/// \brief Write samples of a top-level function to a binary file.
+///
+/// \returns true if the samples were written successfully, false otherwise.
+std::error_code SampleProfileWriterBinary::write(StringRef FName,
+ const FunctionSamples &S) {
+ encodeULEB128(S.getHeadSamples(), *OutputStream);
+ return writeBody(FName, S);
+}
+
+/// \brief Create a sample profile file writer based on the specified format.
///
/// \param Filename The file to create.
///
ErrorOr<std::unique_ptr<SampleProfileWriter>>
SampleProfileWriter::create(StringRef Filename, SampleProfileFormat Format) {
std::error_code EC;
+ std::unique_ptr<raw_ostream> OS;
+ if (Format == SPF_Binary)
+ OS.reset(new raw_fd_ostream(Filename, EC, sys::fs::F_None));
+ else
+ OS.reset(new raw_fd_ostream(Filename, EC, sys::fs::F_Text));
+ if (EC)
+ return EC;
+
+ return create(OS, Format);
+}
+
+/// \brief Create a sample profile stream writer based on the specified format.
+///
+/// \param OS The output stream to store the profile data to.
+///
+/// \param Writer The writer to instantiate according to the specified format.
+///
+/// \param Format Encoding format for the profile file.
+///
+/// \returns an error code indicating the status of the created writer.
+ErrorOr<std::unique_ptr<SampleProfileWriter>>
+SampleProfileWriter::create(std::unique_ptr<raw_ostream> &OS,
+ SampleProfileFormat Format) {
+ std::error_code EC;
std::unique_ptr<SampleProfileWriter> Writer;
if (Format == SPF_Binary)
- Writer.reset(new SampleProfileWriterBinary(Filename, EC));
+ Writer.reset(new SampleProfileWriterBinary(OS));
else if (Format == SPF_Text)
- Writer.reset(new SampleProfileWriterText(Filename, EC));
+ Writer.reset(new SampleProfileWriterText(OS));
+ else if (Format == SPF_GCC)
+ EC = sampleprof_error::unsupported_writing_format;
else
EC = sampleprof_error::unrecognized_format;
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