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//===-- llvm-bcanalyzer.cpp - Byte Code Analyzer --------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file was developed by Reid Spencer and is distributed under the
// University of Illinois Open Source License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This tool may be invoked in the following manner:
// llvm-bcanalyzer [options] - Read LLVM bytecode from stdin
// llvm-bcanalyzer [options] x.bc - Read LLVM bytecode from the x.bc file
//
// Options:
// --help - Output information about command line switches
// --nodetails - Don't print out detailed informaton about individual
// blocks and functions
// --dump - Dump low-level bytecode structure in readable format
//
// This tool provides analytical information about a bytecode file. It is
// intended as an aid to developers of bytecode reading and writing software. It
// produces on std::out a summary of the bytecode file that shows various
// statistics about the contents of the file. By default this information is
// detailed and contains information about individual bytecode blocks and the
// functions in the module. To avoid this more detailed output, use the
// -nodetails option to limit the output to just module level information.
// The tool is also able to print a bytecode file in a straight forward text
// format that shows the containment and relationships of the information in
// the bytecode file (-dump option).
//===----------------------------------------------------------------------===//
#include "llvm/Analysis/Verifier.h"
#include "llvm/Bytecode/Analyzer.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/System/Signals.h"
#include <fstream>
#include <iostream>
using namespace llvm;
static cl::opt<std::string>
InputFilename(cl::Positional, cl::desc("<input bytecode>"), cl::init("-"));
static cl::opt<std::string>
OutputFilename("-o", cl::init("-"), cl::desc("<output file>"));
static cl::opt<bool> NoDetails ("nodetails", cl::desc("Skip detailed output"));
static cl::opt<bool> Dump ("dump", cl::desc("Dump low level bytecode trace"));
static cl::opt<bool> Verify ("verify", cl::desc("Progressively verify module"));
int
main(int argc, char **argv)
{
cl::ParseCommandLineOptions(argc, argv,
" llvm-bcanalyzer Analysis of ByteCode Dumper\n");
sys::PrintStackTraceOnErrorSignal();
std::ostream* Out = &std::cout; // Default to printing to stdout...
std::istream* In = &std::cin; // Default to reading stdin
std::string ErrorMessage;
BytecodeAnalysis bca;
/// Determine what to generate
bca.detailedResults = !NoDetails;
bca.progressiveVerify = Verify;
/// Analyze the bytecode file
Module* M = AnalyzeBytecodeFile(InputFilename, bca, &ErrorMessage, (Dump?Out:0));
// All that bcanalyzer does is write the gathered statistics to the output
PrintBytecodeAnalysis(bca,*Out);
if ( M && Verify ) {
std::string verificationMsg;
try {
verifyModule( *M, ThrowExceptionAction );
} catch (std::string& errmsg ) {
verificationMsg = errmsg;
}
if ( verificationMsg.length() > 0 )
std::cerr << "Final Verification Message: " << verificationMsg << "\n";
}
// If there was an error, print it and stop.
if ( ErrorMessage.size() ) {
std::cerr << argv[0] << ": " << ErrorMessage << "\n";
return 1;
}
if (Out != &std::cout) {
((std::ofstream*)Out)->close();
delete Out;
}
return 0;
}
// vim: sw=2
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