forked from OSchip/llvm-project
121 lines
3.9 KiB
C++
121 lines
3.9 KiB
C++
//===-- llvm-strings.cpp - Printable String dumping utility ---------------===//
|
|
//
|
|
// 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 program is a utility that works like binutils "strings", that is, it
|
|
// prints out printable strings in a binary, objdump, or archive file.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/Object/Binary.h"
|
|
#include "llvm/Support/CommandLine.h"
|
|
#include "llvm/Support/Error.h"
|
|
#include "llvm/Support/Format.h"
|
|
#include "llvm/Support/InitLLVM.h"
|
|
#include "llvm/Support/MemoryBuffer.h"
|
|
#include "llvm/Support/Program.h"
|
|
#include <cctype>
|
|
#include <string>
|
|
|
|
using namespace llvm;
|
|
using namespace llvm::object;
|
|
|
|
static cl::list<std::string> InputFileNames(cl::Positional,
|
|
cl::desc("<input object files>"),
|
|
cl::ZeroOrMore);
|
|
|
|
static cl::opt<bool>
|
|
PrintFileName("print-file-name",
|
|
cl::desc("Print the name of the file before each string"));
|
|
static cl::alias PrintFileNameShort("f", cl::desc(""),
|
|
cl::aliasopt(PrintFileName));
|
|
|
|
static cl::opt<int>
|
|
MinLength("bytes", cl::desc("Print sequences of the specified length"),
|
|
cl::init(4));
|
|
static cl::alias MinLengthShort("n", cl::desc(""), cl::aliasopt(MinLength));
|
|
|
|
static cl::opt<bool>
|
|
AllSections("all",
|
|
cl::desc("Check all sections, not just the data section"));
|
|
static cl::alias AllSectionsShort("a", cl::desc(""),
|
|
cl::aliasopt(AllSections));
|
|
|
|
enum radix { none, octal, hexadecimal, decimal };
|
|
static cl::opt<radix>
|
|
Radix("radix", cl::desc("print the offset within the file"),
|
|
cl::values(clEnumValN(octal, "o", "octal"),
|
|
clEnumValN(hexadecimal, "x", "hexadecimal"),
|
|
clEnumValN(decimal, "d", "decimal")),
|
|
cl::init(none));
|
|
static cl::alias RadixShort("t", cl::desc(""), cl::aliasopt(Radix));
|
|
|
|
static cl::extrahelp
|
|
HelpResponse("\nPass @FILE as argument to read options from FILE.\n");
|
|
|
|
static void strings(raw_ostream &OS, StringRef FileName, StringRef Contents) {
|
|
auto print = [&OS, FileName](unsigned Offset, StringRef L) {
|
|
if (L.size() < static_cast<size_t>(MinLength))
|
|
return;
|
|
if (PrintFileName)
|
|
OS << FileName << ": ";
|
|
switch (Radix) {
|
|
case none:
|
|
break;
|
|
case octal:
|
|
OS << format("%7o ", Offset);
|
|
break;
|
|
case hexadecimal:
|
|
OS << format("%7x ", Offset);
|
|
break;
|
|
case decimal:
|
|
OS << format("%7u ", Offset);
|
|
break;
|
|
}
|
|
OS << L << '\n';
|
|
};
|
|
|
|
const char *B = Contents.begin();
|
|
const char *P = nullptr, *E = nullptr, *S = nullptr;
|
|
for (P = Contents.begin(), E = Contents.end(); P < E; ++P) {
|
|
if (isPrint(*P) || *P == '\t') {
|
|
if (S == nullptr)
|
|
S = P;
|
|
} else if (S) {
|
|
print(S - B, StringRef(S, P - S));
|
|
S = nullptr;
|
|
}
|
|
}
|
|
if (S)
|
|
print(S - B, StringRef(S, E - S));
|
|
}
|
|
|
|
int main(int argc, char **argv) {
|
|
InitLLVM X(argc, argv);
|
|
|
|
cl::ParseCommandLineOptions(argc, argv, "llvm string dumper\n");
|
|
if (MinLength == 0) {
|
|
errs() << "invalid minimum string length 0\n";
|
|
return EXIT_FAILURE;
|
|
}
|
|
|
|
if (InputFileNames.empty())
|
|
InputFileNames.push_back("-");
|
|
|
|
for (const auto &File : InputFileNames) {
|
|
ErrorOr<std::unique_ptr<MemoryBuffer>> Buffer =
|
|
MemoryBuffer::getFileOrSTDIN(File);
|
|
if (std::error_code EC = Buffer.getError())
|
|
errs() << File << ": " << EC.message() << '\n';
|
|
else
|
|
strings(llvm::outs(), File == "-" ? "{standard input}" : File,
|
|
Buffer.get()->getMemBufferRef().getBuffer());
|
|
}
|
|
|
|
return EXIT_SUCCESS;
|
|
}
|