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//===- llvm-profdata.cpp - LLVM profile data tool -------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// llvm-profdata merges .profdata files.
//
//===----------------------------------------------------------------------===//
#include "llvm/ADT/StringRef.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/LineIterator.h"
#include "llvm/Support/ManagedStatic.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/PrettyStackTrace.h"
#include "llvm/Support/Signals.h"
#include "llvm/Support/raw_ostream.h"
using namespace llvm;
static cl::opt<std::string> Filename1(cl::Positional, cl::Required,
cl::desc("file1"));
static cl::opt<std::string> Filename2(cl::Positional, cl::Required,
cl::desc("file2"));
static cl::opt<std::string> OutputFilename("output", cl::value_desc("output"),
cl::init("-"),
cl::desc("Output file"));
static cl::alias OutputFilenameA("o", cl::desc("Alias for --output"),
cl::aliasopt(OutputFilename));
static void exitWithError(const std::string &Message,
const std::string &Filename, int64_t Line = -1) {
errs() << "error: " << Filename;
if (Line >= 0)
errs() << ":" << Line;
errs() << ": " << Message << "\n";
::exit(1);
}
//===----------------------------------------------------------------------===//
int main(int argc, char **argv) {
// Print a stack trace if we signal out.
sys::PrintStackTraceOnErrorSignal();
PrettyStackTraceProgram X(argc, argv);
llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
cl::ParseCommandLineOptions(argc, argv, "LLVM profile data merger\n");
std::unique_ptr<MemoryBuffer> File1;
std::unique_ptr<MemoryBuffer> File2;
if (error_code ec = MemoryBuffer::getFile(Filename1, File1))
exitWithError(ec.message(), Filename1);
if (error_code ec = MemoryBuffer::getFile(Filename2, File2))
exitWithError(ec.message(), Filename2);
if (OutputFilename.empty())
OutputFilename = "-";
std::string ErrorInfo;
raw_fd_ostream Output(OutputFilename.data(), ErrorInfo, sys::fs::F_Text);
if (!ErrorInfo.empty())
exitWithError(ErrorInfo, OutputFilename);
enum {ReadName, ReadHash, ReadCount, ReadCounters} State = ReadName;
uint64_t N1, N2, NumCounters;
line_iterator I1(*File1, '#'), I2(*File2, '#');
for (; !I1.is_at_end() && !I2.is_at_end(); ++I1, ++I2) {
if (I1->empty()) {
if (!I2->empty())
exitWithError("data mismatch", Filename2, I2.line_number());
Output << "\n";
continue;
}
switch (State) {
case ReadName:
if (*I1 != *I2)
exitWithError("function name mismatch", Filename2, I2.line_number());
Output << *I1 << "\n";
State = ReadHash;
break;
case ReadHash:
if (I1->getAsInteger(10, N1))
exitWithError("bad function hash", Filename1, I1.line_number());
if (I2->getAsInteger(10, N2))
exitWithError("bad function hash", Filename2, I2.line_number());
if (N1 != N2)
exitWithError("function hash mismatch", Filename2, I2.line_number());
Output << N1 << "\n";
State = ReadCount;
break;
case ReadCount:
if (I1->getAsInteger(10, N1))
exitWithError("bad function count", Filename1, I1.line_number());
if (I2->getAsInteger(10, N2))
exitWithError("bad function count", Filename2, I2.line_number());
if (N1 != N2)
exitWithError("function count mismatch", Filename2, I2.line_number());
Output << N1 << "\n";
NumCounters = N1;
State = ReadCounters;
break;
case ReadCounters:
if (I1->getAsInteger(10, N1))
exitWithError("invalid counter", Filename1, I1.line_number());
if (I2->getAsInteger(10, N2))
exitWithError("invalid counter", Filename2, I2.line_number());
uint64_t Sum = N1 + N2;
if (Sum < N1)
exitWithError("counter overflow", Filename2, I2.line_number());
Output << N1 + N2 << "\n";
if (--NumCounters == 0)
State = ReadName;
break;
}
}
if (!I1.is_at_end())
exitWithError("truncated file", Filename1, I1.line_number());
if (!I2.is_at_end())
exitWithError("truncated file", Filename2, I2.line_number());
if (State != ReadName)
exitWithError("truncated file", Filename1, I1.line_number());
return 0;
}
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