6c82695753
Essentially echo "" | yaml2obj crashes. This patch attempts to trim whitespace and determine if the yaml string in the file is empty or not. If the input is empty then it will not properly print out an error message and return an error code. Differential Revision: https://reviews.llvm.org/D59964 A test/tools/yaml2obj/empty.yaml M tools/yaml2obj/yaml2obj.cpp llvm-svn: 357219
101 lines
3.0 KiB
C++
101 lines
3.0 KiB
C++
//===- yaml2obj - Convert YAML to a binary object file --------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This program takes a YAML description of an object file and outputs the
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// binary equivalent.
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//
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// This is used for writing tests that require binary files.
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//
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//===----------------------------------------------------------------------===//
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#include "yaml2obj.h"
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#include "llvm/ADT/StringExtras.h"
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#include "llvm/ObjectYAML/ObjectYAML.h"
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#include "llvm/Support/CommandLine.h"
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#include "llvm/Support/FileSystem.h"
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#include "llvm/Support/InitLLVM.h"
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#include "llvm/Support/MemoryBuffer.h"
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#include "llvm/Support/ToolOutputFile.h"
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#include "llvm/Support/YAMLTraits.h"
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#include "llvm/Support/raw_ostream.h"
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#include <system_error>
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using namespace llvm;
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static cl::opt<std::string>
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Input(cl::Positional, cl::desc("<input>"), cl::init("-"));
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cl::opt<unsigned>
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DocNum("docnum", cl::init(1),
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cl::desc("Read specified document from input (default = 1)"));
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static cl::opt<std::string> OutputFilename("o", cl::desc("Output filename"),
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cl::value_desc("filename"));
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LLVM_ATTRIBUTE_NORETURN static void error(Twine Message) {
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errs() << Message << "\n";
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exit(1);
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}
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static int convertYAML(yaml::Input &YIn, raw_ostream &Out) {
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unsigned CurDocNum = 0;
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do {
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if (++CurDocNum == DocNum) {
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yaml::YamlObjectFile Doc;
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YIn >> Doc;
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if (YIn.error())
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error("yaml2obj: Failed to parse YAML file!");
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if (Doc.Elf)
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return yaml2elf(*Doc.Elf, Out);
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if (Doc.Coff)
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return yaml2coff(*Doc.Coff, Out);
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if (Doc.MachO || Doc.FatMachO)
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return yaml2macho(Doc, Out);
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if (Doc.Minidump)
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return yaml2minidump(*Doc.Minidump, Out);
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if (Doc.Wasm)
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return yaml2wasm(*Doc.Wasm, Out);
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error("yaml2obj: Unknown document type!");
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}
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} while (YIn.nextDocument());
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error("yaml2obj: Cannot find the " + Twine(DocNum) +
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llvm::getOrdinalSuffix(DocNum) + " document");
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}
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int main(int argc, char **argv) {
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InitLLVM X(argc, argv);
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cl::ParseCommandLineOptions(argc, argv);
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if (OutputFilename.empty())
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OutputFilename = "-";
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std::error_code EC;
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std::unique_ptr<ToolOutputFile> Out(
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new ToolOutputFile(OutputFilename, EC, sys::fs::F_None));
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if (EC)
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error("yaml2obj: Error opening '" + OutputFilename + "': " + EC.message());
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ErrorOr<std::unique_ptr<MemoryBuffer>> Buf =
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MemoryBuffer::getFileOrSTDIN(Input);
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if (!Buf)
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return 1;
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StringRef Buffer = Buf.get()->getBuffer();
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if (Buffer.trim().size() == 0)
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error("yaml2obj: Error opening '" + Input + "': Empty File.");
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yaml::Input YIn(Buffer);
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int Res = convertYAML(YIn, Out->os());
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if (Res == 0)
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Out->keep();
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Out->os().flush();
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return Res;
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}
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