llvm/lib/Support
2014-08-21 20:44:56 +00:00
..
Unix Canonicalize header guards into a common format. 2014-08-13 16:26:38 +00:00
Windows Remove dead code. Fixes pr20544. 2014-08-08 21:35:52 +00:00
Allocator.cpp
APFloat.cpp
APInt.cpp
APSInt.cpp
ARMBuildAttrs.cpp
ARMWinEH.cpp
Atomic.cpp
BlockFrequency.cpp
BranchProbability.cpp
circular_raw_ostream.cpp
CMakeLists.txt Remove Support/IncludeFile.h and its only user. This is actively harmful, since 2014-08-07 20:41:17 +00:00
CommandLine.cpp Revert "[Support] Promote cl::StringSaver to a separate utility" 2014-08-15 23:39:01 +00:00
Compression.cpp
ConvertUTF.c
ConvertUTFWrapper.cpp
COPYRIGHT.regex
CrashRecoveryContext.cpp For CrashRecoveryContext::RunSafelyOnThread, propagate Darwin's PRIO_DARWIN_BG to the new thread if it is 2014-06-25 23:54:50 +00:00
DAGDeltaAlgorithm.cpp
DataExtractor.cpp
DataStream.cpp
Debug.cpp
DeltaAlgorithm.cpp
Dwarf.cpp
DynamicLibrary.cpp
Errno.cpp
ErrorHandling.cpp
FileOutputBuffer.cpp Remove uses of the redundant ".reset(nullptr)" of unique_ptr, in favor of ".reset()" 2014-07-19 01:05:11 +00:00
FileUtilities.cpp Remove some calls to std::move. 2014-08-01 14:31:55 +00:00
FoldingSet.cpp
FormattedStream.cpp
GraphWriter.cpp
Hashing.cpp
Host.cpp Add support for ppc64/power8 as a host 2014-06-26 13:37:03 +00:00
IntEqClasses.cpp
IntervalMap.cpp
IntrusiveRefCntPtr.cpp
IsInf.cpp
IsNAN.cpp
LEB128.cpp
LineIterator.cpp
LLVMBuild.txt
Locale.cpp
LockFileManager.cpp Remove some calls to std::move. 2014-08-01 14:31:55 +00:00
Makefile
ManagedStatic.cpp
MD5.cpp
Memory.cpp
MemoryBuffer.cpp Don't own the buffer in object::Binary. 2014-08-19 18:44:46 +00:00
MemoryObject.cpp
Mutex.cpp
Path.cpp Fix the windows build. 2014-08-08 22:09:31 +00:00
PluginLoader.cpp
PrettyStackTrace.cpp
Process.cpp Refactor the code in clang to find a file in a PATH like environment variable into a helper function 2014-06-30 19:54:20 +00:00
Program.cpp
RandomNumberGenerator.cpp Random Number Generator (llvm) 2014-06-25 15:21:42 +00:00
raw_os_ostream.cpp
raw_ostream.cpp Typo: exists -> exits 2014-07-17 18:33:44 +00:00
README.txt.system
regcclass.h
regcname.h
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 Fix undefined behavior (left shift by 64 bits) in ScaledNumber::toString(). 2014-08-20 18:30:07 +00:00
SearchForAddressOfSpecialSymbol.cpp
Signals.cpp
SmallPtrSet.cpp Fix an off by 1 bug that prevented SmallPtrSet from using all of its 'small' capacity. Then fix the early return in the move constructor that prevented 'small' moves from clearing the NumElements in the moved from object. The directed test missed this because it was always testing large moves due to the off by 1 bug. 2014-08-20 04:41:36 +00:00
SmallVector.cpp
SourceMgr.cpp Explicitly pass ownership of the MemoryBuffer to AddNewSourceBuffer using std::unique_ptr 2014-08-21 20:44:56 +00:00
SpecialCaseList.cpp Remove move assignment operator to appease older GCCs. 2014-07-10 04:39:40 +00:00
Statistic.cpp
StreamableMemoryObject.cpp
StringExtras.cpp
StringMap.cpp
StringPool.cpp
StringRef.cpp Remove custom implementations of max/min in StringRef that was originally added to work an old gcc bug. I believe its been fixed by now. 2014-08-21 04:31:10 +00:00
StringRefMemoryObject.cpp
SystemUtils.cpp
TargetRegistry.cpp Remove obsolete function TargetRegistry::getClosestTargetForJIT() 2014-07-01 10:47:13 +00:00
Threading.cpp Re-apply r211287: Remove support for LLVM runtime multi-threading. 2014-06-27 15:13:01 +00:00
ThreadLocal.cpp
Timer.cpp
TimeValue.cpp Fix 'platform-specific' hyphenations 2014-06-30 18:57:16 +00:00
ToolOutputFile.cpp
Triple.cpp Delete support for AuroraUX. 2014-08-14 15:15:09 +00:00
Twine.cpp
Unicode.cpp
Valgrind.cpp
Watchdog.cpp
YAMLParser.cpp Explicitly pass ownership of the MemoryBuffer to AddNewSourceBuffer using std::unique_ptr 2014-08-21 20:44:56 +00:00
YAMLTraits.cpp Fix bug 20125 - clang-format segfaults on bad config. 2014-08-08 13:58:00 +00:00

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