[llvm] r286556 - llvm-strings: introduce basic strings tool

[Michael Spencer via llvm-commits]

Was there a review thread for this? I was at the C++ standards meeting all
last week so I may have missed it.

- Michael Spencer

On Thu, Nov 10, 2016 at 7:44 PM, Saleem Abdulrasool via llvm-commits <
llvm-commits at lists.llvm.org> wrote:

> Author: compnerd
> Date: Thu Nov 10 21:44:12 2016
> New Revision: 286556
>
> URL: http://llvm.org/viewvc/llvm-project?rev=286556&view=rev
> Log:
> llvm-strings: introduce basic strings tool
>
> This is a replacement to binutils' string tool.  It prints strings found
> in a
> binary (object file, executable, or archive library).  It is rather bare
> and
> not functionally equivalent, however, it lays the groundwork necessary for
> the
> strings tool, enabling iterative development of features to reach feature
> parity.
>
> Added:
>     llvm/trunk/tools/llvm-strings/
>     llvm/trunk/tools/llvm-strings/CMakeLists.txt
>     llvm/trunk/tools/llvm-strings/LLVMBuild.txt
>     llvm/trunk/tools/llvm-strings/llvm-strings.cpp
>
> Added: llvm/trunk/tools/llvm-strings/CMakeLists.txt
> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/tools/llvm-
> strings/CMakeLists.txt?rev=286556&view=auto
> ============================================================
> ==================
> --- llvm/trunk/tools/llvm-strings/CMakeLists.txt (added)
> +++ llvm/trunk/tools/llvm-strings/CMakeLists.txt Thu Nov 10 21:44:12 2016
> @@ -0,0 +1,8 @@
> +set(LLVM_LINK_COMPONENTS
> +  Object
> +  )
> +
> +add_llvm_tool(llvm-strings
> +  llvm-strings.cpp
> +  )
> +
>
> Added: llvm/trunk/tools/llvm-strings/LLVMBuild.txt
> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/tools/llvm-
> strings/LLVMBuild.txt?rev=286556&view=auto
> ============================================================
> ==================
> --- llvm/trunk/tools/llvm-strings/LLVMBuild.txt (added)
> +++ llvm/trunk/tools/llvm-strings/LLVMBuild.txt Thu Nov 10 21:44:12 2016
> @@ -0,0 +1,22 @@
> +;===- ./tools/llvm-strings/LLVMBuild.txt -----------------------*- Conf
> -*--===;
> +;
> +;                     The LLVM Compiler Infrastructure
> +;
> +; This file is distributed under the University of Illinois Open Source
> +; License. See LICENSE.TXT for details.
> +;
> +;===-------------------------------------------------------
> -----------------===;
> +;
> +; This is an LLVMBuild description file for the components in this
> subdirectory.
> +;
> +; For more information on the LLVMBuild system, please see:
> +;
> +;   http://llvm.org/docs/LLVMBuild.html
> +;
> +;===-------------------------------------------------------
> -----------------===;
> +
> +[component_0]
> +type = Tool
> +name = llvm-strings
> +parent = Tools
> +required_libraries = Archive Object
>
> Added: llvm/trunk/tools/llvm-strings/llvm-strings.cpp
> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/tools/llvm-
> strings/llvm-strings.cpp?rev=286556&view=auto
> ============================================================
> ==================
> --- llvm/trunk/tools/llvm-strings/llvm-strings.cpp (added)
> +++ llvm/trunk/tools/llvm-strings/llvm-strings.cpp Thu Nov 10 21:44:12
> 2016
> @@ -0,0 +1,120 @@
> +//===-- llvm-strings.cpp - Printable String dumping utility
> ---------------===//
> +//
> +//                     The LLVM Compiler Infrastructure
> +//
> +// This file is distributed under the University of Illinois Open Source
> +// License. See LICENSE.TXT for details.
> +//
> +//===------------------------------------------------------
> ----------------===//
> +//
> +// 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/IR/LLVMContext.h"
> +#include "llvm/Object/Archive.h"
> +#include "llvm/Object/Binary.h"
> +#include "llvm/Object/ObjectFile.h"
> +#include "llvm/Support/CommandLine.h"
> +#include "llvm/Support/Error.h"
> +#include "llvm/Support/MemoryBuffer.h"
> +#include "llvm/Support/PrettyStackTrace.h"
> +#include "llvm/Support/Program.h"
> +#include "llvm/Support/Signals.h"
> +#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 void dump(raw_ostream &OS, StringRef Contents) {
> +  const char *S = nullptr;
> +  for (const char *P = Contents.begin(), *E = Contents.end(); P < E; ++P)
> {
> +    if (std::isgraph(*P) || std::isblank(*P)) {
> +      if (S == nullptr)
> +        S = P;
> +    } else if (S) {
> +      if (P - S > 3)
> +        OS << StringRef(S, P - S) << '\n';
> +      S = nullptr;
> +    }
> +  }
> +}
> +
> +namespace {
> +class Strings {
> +  LLVMContext Context;
> +  raw_ostream &OS;
> +
> +  void dump(const ObjectFile *O) {
> +    for (const auto &S : O->sections()) {
> +      StringRef Contents;
> +      if (!S.getContents(Contents))
> +        ::dump(OS, Contents);
> +    }
> +  }
> +
> +  void dump(const Archive *A) {
> +    Error E;
> +    for (auto &Element : A->children(E)) {
> +      if (Expected<std::unique_ptr<Binary>> Child =
> +              Element.getAsBinary(&Context)) {
> +        dump(dyn_cast<ObjectFile>(&**Child));
> +      } else {
> +        if (auto E = isNotObjectErrorInvalidFileType(Child.takeError()))
> {
> +          errs() << A->getFileName();
> +          if (Expected<StringRef> Name = Element.getName())
> +            errs() << '(' << *Name << ')';
> +          logAllUnhandledErrors(std::move(E), errs(), "");
> +          errs() << '\n';
> +        }
> +      }
> +    }
> +    static_cast<bool>(E);
> +  }
> +
> +public:
> +  Strings(raw_ostream &S) : OS(S) {}
> +
> +  void scan(StringRef File) {
> +    ErrorOr<std::unique_ptr<MemoryBuffer>> Buffer =
> +        MemoryBuffer::getFileOrSTDIN(File);
> +    if (std::error_code EC = Buffer.getError()) {
> +      errs() << File << ": " << EC.message() << '\n';
> +      return;
> +    }
> +
> +    if (Expected<std::unique_ptr<Binary>> B =
> +            createBinary(Buffer.get()->getMemBufferRef(), &Context)) {
> +      if (auto *A = dyn_cast<Archive>(&**B))
> +        return dump(A);
> +      if (auto *O = dyn_cast<ObjectFile>(&**B))
> +        return dump(O);
> +      ::dump(OS, Buffer.get()->getMemBufferRef().getBuffer());
> +    } else {
> +      consumeError(B.takeError());
> +      ::dump(OS, Buffer.get()->getMemBufferRef().getBuffer());
> +    }
> +  }
> +};
> +}
> +
> +int main(int argc, char **argv) {
> +  sys::PrintStackTraceOnErrorSignal(argv[0]);
> +  PrettyStackTraceProgram X(argc, argv);
> +
> +  cl::ParseCommandLineOptions(argc, argv, "llvm string dumper\n");
> +
> +  if (InputFileNames.empty())
> +    InputFileNames.push_back("-");
> +
> +  Strings S(llvm::outs());
> +  std::for_each(InputFileNames.begin(), InputFileNames.end(),
> +                [&S](StringRef F) { S.scan(F); });
> +  return EXIT_SUCCESS;
> +}
> +
>
>
> _______________________________________________
> llvm-commits mailing list
> llvm-commits at lists.llvm.org
> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-commits
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.llvm.org/pipermail/llvm-commits/attachments/20161114/56266de0/attachment.html>