forked from OSchip/llvm-project
114 lines
4.3 KiB
C++
114 lines
4.3 KiB
C++
//===-- llvm-bcanalyzer.cpp - Bitcode Analyzer --------------------------===//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This tool may be invoked in the following manner:
|
|
// llvm-bcanalyzer [options] - Read LLVM bitcode from stdin
|
|
// llvm-bcanalyzer [options] x.bc - Read LLVM bitcode from the x.bc file
|
|
//
|
|
// Options:
|
|
// --help - Output information about command line switches
|
|
// --dump - Dump low-level bitcode structure in readable format
|
|
//
|
|
// This tool provides analytical information about a bitcode file. It is
|
|
// intended as an aid to developers of bitcode reading and writing software. It
|
|
// produces on std::out a summary of the bitcode file that shows various
|
|
// statistics about the contents of the file. By default this information is
|
|
// detailed and contains information about individual bitcode blocks and the
|
|
// functions in the module.
|
|
// The tool is also able to print a bitcode file in a straight forward text
|
|
// format that shows the containment and relationships of the information in
|
|
// the bitcode file (-dump option).
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/ADT/Optional.h"
|
|
#include "llvm/Bitcode/BitcodeAnalyzer.h"
|
|
#include "llvm/Support/CommandLine.h"
|
|
#include "llvm/Support/Error.h"
|
|
#include "llvm/Support/InitLLVM.h"
|
|
#include "llvm/Support/MemoryBuffer.h"
|
|
#include "llvm/Support/raw_ostream.h"
|
|
#include <memory>
|
|
using namespace llvm;
|
|
|
|
static cl::opt<std::string>
|
|
InputFilename(cl::Positional, cl::desc("<input bitcode>"), cl::init("-"));
|
|
|
|
static cl::opt<bool> Dump("dump", cl::desc("Dump low level bitcode trace"));
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// Bitcode specific analysis.
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
static cl::opt<bool> NoHistogram("disable-histogram",
|
|
cl::desc("Do not print per-code histogram"));
|
|
|
|
static cl::opt<bool> NonSymbolic("non-symbolic",
|
|
cl::desc("Emit numeric info in dump even if"
|
|
" symbolic info is available"));
|
|
|
|
static cl::opt<std::string>
|
|
BlockInfoFilename("block-info",
|
|
cl::desc("Use the BLOCK_INFO from the given file"));
|
|
|
|
static cl::opt<bool>
|
|
ShowBinaryBlobs("show-binary-blobs",
|
|
cl::desc("Print binary blobs using hex escapes"));
|
|
|
|
static cl::opt<std::string> CheckHash(
|
|
"check-hash",
|
|
cl::desc("Check module hash using the argument as a string table"));
|
|
|
|
static Error reportError(StringRef Message) {
|
|
return createStringError(std::errc::illegal_byte_sequence, Message.data());
|
|
}
|
|
|
|
static Expected<std::unique_ptr<MemoryBuffer>> openBitcodeFile(StringRef Path) {
|
|
// Read the input file.
|
|
Expected<std::unique_ptr<MemoryBuffer>> MemBufOrErr =
|
|
errorOrToExpected(MemoryBuffer::getFileOrSTDIN(Path));
|
|
if (Error E = MemBufOrErr.takeError())
|
|
return std::move(E);
|
|
|
|
std::unique_ptr<MemoryBuffer> MemBuf = std::move(*MemBufOrErr);
|
|
|
|
if (MemBuf->getBufferSize() & 3)
|
|
return reportError(
|
|
"Bitcode stream should be a multiple of 4 bytes in length");
|
|
return std::move(MemBuf);
|
|
}
|
|
|
|
int main(int argc, char **argv) {
|
|
InitLLVM X(argc, argv);
|
|
cl::ParseCommandLineOptions(argc, argv, "llvm-bcanalyzer file analyzer\n");
|
|
ExitOnError ExitOnErr("llvm-bcanalyzer: ");
|
|
|
|
std::unique_ptr<MemoryBuffer> MB = ExitOnErr(openBitcodeFile(InputFilename));
|
|
std::unique_ptr<MemoryBuffer> BlockInfoMB = nullptr;
|
|
if (!BlockInfoFilename.empty())
|
|
BlockInfoMB = ExitOnErr(openBitcodeFile(BlockInfoFilename));
|
|
|
|
BitcodeAnalyzer BA(MB->getBuffer(),
|
|
BlockInfoMB ? Optional<StringRef>(BlockInfoMB->getBuffer())
|
|
: None);
|
|
|
|
BCDumpOptions O(outs());
|
|
O.Histogram = !NoHistogram;
|
|
O.Symbolic = !NonSymbolic;
|
|
O.ShowBinaryBlobs = ShowBinaryBlobs;
|
|
|
|
ExitOnErr(
|
|
BA.analyze(O, CheckHash.empty() ? None : Optional<StringRef>(CheckHash)));
|
|
|
|
if (Dump)
|
|
outs() << "\n\n";
|
|
|
|
BA.printStats(O, StringRef(InputFilename.getValue()));
|
|
return 0;
|
|
}
|