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Summary: This change fixes a bug where `obj2yaml` can in some cases produce YAML that causes `yaml2obj` to error. The ELF YAML document structure has a `Sections` mapping, which contains three mappings, all of which are optional: `Local`, `Global`, and `Weak.` Any one of these can be missing, but if all three are missing, then `yaml2obj` errors. This change allows YAML input for cases like this one. I have tested this with check-llvm and check-lld, and all tests passed. This change is the result of test failures while working on D39582, which introduces a `DynamicSymbols` mapping, which will be empty at times. Reviewers: compnerd, jakehehrlich, silvas, kledzik, mehdi_amini, pcc Reviewed By: compnerd Subscribers: silvas, llvm-commits Differential Revision: https://reviews.llvm.org/D39908 llvm-svn: 318428 |
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.. | ||
Unix | ||
Windows | ||
Allocator.cpp | ||
AMDGPUMetadata.cpp | ||
APFloat.cpp | ||
APInt.cpp | ||
APSInt.cpp | ||
ARMAttributeParser.cpp | ||
ARMBuildAttrs.cpp | ||
ARMWinEH.cpp | ||
Atomic.cpp | ||
BinaryStreamError.cpp | ||
BinaryStreamReader.cpp | ||
BinaryStreamRef.cpp | ||
BinaryStreamWriter.cpp | ||
BlockFrequency.cpp | ||
BranchProbability.cpp | ||
CachePruning.cpp | ||
Chrono.cpp | ||
circular_raw_ostream.cpp | ||
CMakeLists.txt | ||
CodeGenCoverage.cpp | ||
COM.cpp | ||
CommandLine.cpp | ||
Compression.cpp | ||
ConvertUTF.cpp | ||
ConvertUTFWrapper.cpp | ||
COPYRIGHT.regex | ||
CrashRecoveryContext.cpp | ||
DAGDeltaAlgorithm.cpp | ||
DataExtractor.cpp | ||
Debug.cpp | ||
DebugCounter.cpp | ||
DeltaAlgorithm.cpp | ||
DynamicLibrary.cpp | ||
Errno.cpp | ||
Error.cpp | ||
ErrorHandling.cpp | ||
FileOutputBuffer.cpp | ||
FileUtilities.cpp | ||
FoldingSet.cpp | ||
FormattedStream.cpp | ||
FormatVariadic.cpp | ||
GlobPattern.cpp | ||
GraphWriter.cpp | ||
Hashing.cpp | ||
Host.cpp | ||
IntEqClasses.cpp | ||
IntervalMap.cpp | ||
JamCRC.cpp | ||
KnownBits.cpp | ||
LEB128.cpp | ||
LineIterator.cpp | ||
LLVMBuild.txt | ||
Locale.cpp | ||
LockFileManager.cpp | ||
LowLevelType.cpp | ||
ManagedStatic.cpp | ||
MathExtras.cpp | ||
MD5.cpp | ||
Memory.cpp | ||
MemoryBuffer.cpp | ||
Mutex.cpp | ||
NativeFormatting.cpp | ||
Options.cpp | ||
Parallel.cpp | ||
Path.cpp | ||
PluginLoader.cpp | ||
PrettyStackTrace.cpp | ||
Process.cpp | ||
Program.cpp | ||
RandomNumberGenerator.cpp | ||
raw_os_ostream.cpp | ||
raw_ostream.cpp | ||
README.txt.system | ||
regcomp.c | ||
regengine.inc | ||
regerror.c | ||
regex2.h | ||
regex_impl.h | ||
Regex.cpp | ||
regexec.c | ||
regfree.c | ||
regstrlcpy.c | ||
regutils.h | ||
RWMutex.cpp | ||
ScaledNumber.cpp | ||
ScopedPrinter.cpp | ||
SHA1.cpp | ||
Signals.cpp | ||
SmallPtrSet.cpp | ||
SmallVector.cpp | ||
SourceMgr.cpp | ||
SpecialCaseList.cpp | ||
Statistic.cpp | ||
StringExtras.cpp | ||
StringMap.cpp | ||
StringPool.cpp | ||
StringRef.cpp | ||
StringSaver.cpp | ||
SystemUtils.cpp | ||
TargetParser.cpp | ||
TargetRegistry.cpp | ||
TarWriter.cpp | ||
Threading.cpp | ||
ThreadLocal.cpp | ||
ThreadPool.cpp | ||
Timer.cpp | ||
ToolOutputFile.cpp | ||
TrigramIndex.cpp | ||
Triple.cpp | ||
Twine.cpp | ||
Unicode.cpp | ||
Valgrind.cpp | ||
Watchdog.cpp | ||
xxhash.cpp | ||
YAMLParser.cpp | ||
YAMLTraits.cpp |
Design Of lib/System ==================== The software in this directory is designed to completely shield LLVM from any and all operating system specific functionality. It is not intended to be a complete operating system wrapper (such as ACE), but only to provide the functionality necessary to support LLVM. The software located here, of necessity, has very specific and stringent design rules. Violation of these rules means that cracks in the shield could form and the primary goal of the library is defeated. By consistently using this library, LLVM becomes more easily ported to new platforms since the only thing requiring porting is this library. Complete documentation for the library can be found in the file: llvm/docs/SystemLibrary.html or at this URL: http://llvm.org/docs/SystemLibrary.html While we recommend that you read the more detailed documentation, for the impatient, here's a high level summary of the library's requirements. 1. No system header files are to be exposed through the interface. 2. Std C++ and Std C header files are okay to be exposed through the interface. 3. No exposed system-specific functions. 4. No exposed system-specific data. 5. Data in lib/System classes must use only simple C++ intrinsic types. 6. Errors are handled by returning "true" and setting an optional std::string 7. Library must not throw any exceptions, period. 8. Interface functions must not have throw() specifications. 9. No duplicate function impementations are permitted within an operating system class. To accomplish these requirements, the library has numerous design criteria that must be satisfied. Here's a high level summary of the library's design criteria: 1. No unused functionality (only what LLVM needs) 2. High-Level Interfaces 3. Use Opaque Classes 4. Common Implementations 5. Multiple Implementations 6. Minimize Memory Allocation 7. No Virtual Methods