llvm/lib/AsmParser/Parser.cpp
Alex Lorenz 3f1b2bdf5d AsmParser: Require a terminating null character when creating memory buffer.
This commit modifies the memory buffer creation in the AsmParser library so 
that it requires a terminating null character. The LLLexer in the AsmParser
library checks for EOF only when it sees a null character, thus it would
be best to require it when creating a memory buffer so that the memory
buffer constructor can verify that a terminating null character is indeed
present.

Reviewers: Duncan P. N. Exon Smith, Matthias Braun

Differential Revision: http://reviews.llvm.org/D9883


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@237833 91177308-0d34-0410-b5e6-96231b3b80d8
2015-05-20 20:41:27 +00:00

65 lines
2.3 KiB
C++

//===- Parser.cpp - Main dispatch module for the Parser library -----------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This library implements the functionality defined in llvm/AsmParser/Parser.h
//
//===----------------------------------------------------------------------===//
#include "llvm/AsmParser/Parser.h"
#include "LLParser.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/IR/Module.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/SourceMgr.h"
#include "llvm/Support/raw_ostream.h"
#include <cstring>
#include <system_error>
using namespace llvm;
bool llvm::parseAssemblyInto(MemoryBufferRef F, Module &M, SMDiagnostic &Err) {
SourceMgr SM;
std::unique_ptr<MemoryBuffer> Buf = MemoryBuffer::getMemBuffer(F);
SM.AddNewSourceBuffer(std::move(Buf), SMLoc());
return LLParser(F.getBuffer(), SM, Err, &M).Run();
}
std::unique_ptr<Module> llvm::parseAssembly(MemoryBufferRef F,
SMDiagnostic &Err,
LLVMContext &Context) {
std::unique_ptr<Module> M =
make_unique<Module>(F.getBufferIdentifier(), Context);
if (parseAssemblyInto(F, *M, Err))
return nullptr;
return M;
}
std::unique_ptr<Module> llvm::parseAssemblyFile(StringRef Filename,
SMDiagnostic &Err,
LLVMContext &Context) {
ErrorOr<std::unique_ptr<MemoryBuffer>> FileOrErr =
MemoryBuffer::getFileOrSTDIN(Filename);
if (std::error_code EC = FileOrErr.getError()) {
Err = SMDiagnostic(Filename, SourceMgr::DK_Error,
"Could not open input file: " + EC.message());
return nullptr;
}
return parseAssembly(FileOrErr.get()->getMemBufferRef(), Err, Context);
}
std::unique_ptr<Module> llvm::parseAssemblyString(StringRef AsmString,
SMDiagnostic &Err,
LLVMContext &Context) {
MemoryBufferRef F(AsmString, "<string>");
return parseAssembly(F, Err, Context);
}