2014-02-18 07:22:49 +08:00
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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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#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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using namespace llvm;
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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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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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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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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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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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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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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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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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return true;
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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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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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cl::ParseCommandLineOptions(argc, argv, "LLVM profile data merger\n");
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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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if (OutputFilename.empty())
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OutputFilename = "-";
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std::string ErrorInfo;
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2014-02-24 23:07:20 +08:00
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raw_fd_ostream Output(OutputFilename.data(), ErrorInfo, sys::fs::F_None);
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2014-02-18 07:22:49 +08:00
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if (!ErrorInfo.empty())
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exitWithError(ErrorInfo, OutputFilename);
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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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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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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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if (Words1.size() > 2)
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exitWithError("invalid data", Filename1, Num);
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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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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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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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if (N1 != N2)
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exitWithError("function count mismatch", Filename2, Num);
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Output << Line1 << "\n";
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continue;
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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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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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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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return 0;
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}
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