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+//===- llvm-profdata.cpp - LLVM profile data tool -------------------------===//
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+//
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+// The LLVM Compiler Infrastructure
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+//
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+// This file is distributed under the University of Illinois Open Source
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+// License. See LICENSE.TXT for details.
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+//
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+//===----------------------------------------------------------------------===//
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+//
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+// llvm-profdata merges .profdata files.
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+//
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+//===----------------------------------------------------------------------===//
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+
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+#include "llvm/ADT/OwningPtr.h"
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+#include "llvm/ADT/StringRef.h"
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+#include "llvm/Support/CommandLine.h"
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+#include "llvm/Support/ManagedStatic.h"
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+#include "llvm/Support/MemoryBuffer.h"
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+#include "llvm/Support/PrettyStackTrace.h"
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+#include "llvm/Support/Signals.h"
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+#include "llvm/Support/raw_ostream.h"
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+
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+using namespace llvm;
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+
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+static cl::opt<std::string> Filename1(cl::Positional, cl::Required,
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+ cl::desc("file1"));
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+static cl::opt<std::string> Filename2(cl::Positional, cl::Required,
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+ cl::desc("file2"));
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+
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+static cl::opt<std::string> OutputFilename("output", cl::value_desc("output"),
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+ cl::init("-"),
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+ cl::desc("Output file"));
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+static cl::alias OutputFilenameA("o", cl::desc("Alias for --output"),
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+ cl::aliasopt(OutputFilename));
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+
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+static bool readLine(const char *&Start, const char *End, StringRef &S) {
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+ if (Start == End)
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+ return false;
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+
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+ for (const char *I = Start; I != End; ++I) {
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+ assert(*I && "unexpected binary data");
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+ if (*I == '\n') {
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+ S = StringRef(Start, I - Start);
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+ Start = I + 1;
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+ return true;
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+ }
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+ }
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+
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+ S = StringRef(Start, End - Start);
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+ Start = End;
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+ return true;
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+}
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+
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+static StringRef getWord(const char *&Start, const char *End) {
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+ for (const char *I = Start; I != End; ++I)
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+ if (*I == ' ') {
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+ StringRef S(Start, I - Start);
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+ Start = I + 1;
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+ return S;
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+ }
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+ StringRef S(Start, End - Start);
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+ Start = End;
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+ return S;
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+}
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+
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+static size_t splitWords(const StringRef &Line, std::vector<StringRef> &Words) {
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+ const char *Start = Line.data();
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+ const char *End = Line.data() + Line.size();
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+ Words.clear();
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+ while (Start != End)
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+ Words.push_back(getWord(Start, End));
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+ return Words.size();
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+}
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+
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+static bool getNumber(const StringRef &S, uint64_t &N) {
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+ N = 0;
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+ for (StringRef::iterator I = S.begin(), E = S.end(); I != E; ++I)
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+ if (*I >= '0' && *I <= '9')
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+ N = N * 10 + (*I - '0');
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+ else
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+ return false;
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+
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+ return true;
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+}
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+
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+static void exitWithError(const std::string &Message,
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+ const std::string &Filename, int64_t Line = -1) {
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+ errs() << "error: " << Filename;
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+ if (Line >= 0)
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+ errs() << ":" << Line;
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+ errs() << ": " << Message << "\n";
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+ ::exit(1);
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+}
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+
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+//===----------------------------------------------------------------------===//
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+int main(int argc, char **argv) {
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+ // Print a stack trace if we signal out.
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+ sys::PrintStackTraceOnErrorSignal();
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+ PrettyStackTraceProgram X(argc, argv);
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+ llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
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+
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+ cl::ParseCommandLineOptions(argc, argv, "LLVM profile data merger\n");
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+
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+ OwningPtr<MemoryBuffer> File1;
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+ OwningPtr<MemoryBuffer> File2;
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+ if (error_code ec = MemoryBuffer::getFile(Filename1, File1))
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+ exitWithError(ec.message(), Filename1);
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+ if (error_code ec = MemoryBuffer::getFile(Filename2, File2))
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+ exitWithError(ec.message(), Filename2);
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+
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+ if (OutputFilename.empty())
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+ OutputFilename = "-";
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+
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+ std::string ErrorInfo;
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+ raw_fd_ostream Output(OutputFilename.data(), ErrorInfo);
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+ if (!ErrorInfo.empty())
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+ exitWithError(ErrorInfo, OutputFilename);
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+
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+ const char *Start1 = File1->getBufferStart();
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+ const char *Start2 = File2->getBufferStart();
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+ const char *End1 = File1->getBufferEnd();
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+ const char *End2 = File2->getBufferEnd();
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+ const char *P1 = Start1;
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+ const char *P2 = Start2;
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+
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+ StringRef Line1, Line2;
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+ int64_t Num = 0;
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+ while (readLine(P1, End1, Line1)) {
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+ ++Num;
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+ if (!readLine(P2, End2, Line2))
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+ exitWithError("truncated file", Filename2, Num);
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+
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+ std::vector<StringRef> Words1, Words2;
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+ if (splitWords(Line1, Words1) != splitWords(Line2, Words2))
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+ exitWithError("data mismatch", Filename2, Num);
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+
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+ if (Words1.size() > 2)
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+ exitWithError("invalid data", Filename1, Num);
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+
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+ if (Words1.empty()) {
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+ Output << "\n";
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+ continue;
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+ }
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+
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+ if (Words1.size() == 2) {
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+ if (Words1[0] != Words2[0])
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+ exitWithError("function name mismatch", Filename2, Num);
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+
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+ uint64_t N1, N2;
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+ if (!getNumber(Words1[1], N1))
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+ exitWithError("bad function count", Filename1, Num);
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+ if (!getNumber(Words2[1], N2))
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+ exitWithError("bad function count", Filename2, Num);
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+
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+ if (N1 != N2)
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+ exitWithError("function count mismatch", Filename2, Num);
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+
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+ Output << Line1 << "\n";
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+ continue;
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+ }
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+
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+ uint64_t N1, N2;
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+ if (!getNumber(Words1[0], N1))
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+ exitWithError("invalid counter", Filename1, Num);
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+ if (!getNumber(Words2[0], N2))
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+ exitWithError("invalid counter", Filename2, Num);
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+
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+ uint64_t Sum = N1 + N2;
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+ if (Sum < N1)
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+ exitWithError("counter overflow", Filename2, Num);
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+
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+ Output << N1 + N2 << "\n";
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+ }
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+ if (readLine(P2, End2, Line2))
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+ exitWithError("truncated file", Filename1, Num + 1);
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+
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+ return 0;
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+}
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Duncan P. N. Exon Smith