llvm-mirror/lib/Support
2011-09-16 18:36:31 +00:00
..
Unix Include limits.h to make sure PATH_MAX is known on Solaris 10. 2011-09-14 21:49:42 +00:00
Windows lib/Support/Windows/Windows.h: Update required IE ver. 0x0600 should be enough for Windows XP. 2011-08-23 03:49:11 +00:00
Allocator.cpp
APFloat.cpp Silence a bunch (but not all) "variable written but not read" warnings 2011-08-12 14:54:45 +00:00
APInt.cpp Add APInt support for converting to/from hexatridecimal strings 2011-09-14 15:54:46 +00:00
APSInt.cpp
Atomic.cpp
BlockFrequency.cpp Optimize 96-bit division a little bit. 2011-07-27 16:00:40 +00:00
BranchProbability.cpp BranchProbability::print returns void now. 2011-07-25 22:27:42 +00:00
circular_raw_ostream.cpp
CMakeLists.txt Add the DataExtractor utility class. 2011-09-13 19:42:16 +00:00
CommandLine.cpp CommandLine: Add support for 64 bit unsigned integer options. 2011-09-15 21:17:37 +00:00
ConstantRange.cpp Trim includes. 2011-07-27 15:20:06 +00:00
COPYRIGHT.regex
CrashRecoveryContext.cpp lib/Support/CrashRecoveryContext.cpp: Add Win32 support to CrashRecoveryContext. Thanks to Aaron Ballman! 2011-08-20 06:35:36 +00:00
DAGDeltaAlgorithm.cpp
DataExtractor.cpp Add the DataExtractor utility class. 2011-09-13 19:42:16 +00:00
Debug.cpp
DeltaAlgorithm.cpp
Disassembler.cpp
Dwarf.cpp Add some more DWARF extensions from: 2011-09-15 05:21:03 +00:00
DynamicLibrary.cpp Make DynamicLibrary thread-safe w/r/t call to dlerror() after dlopen(). PR10718 2011-08-22 19:01:52 +00:00
Errno.cpp
ErrorHandling.cpp
FileUtilities.cpp
FoldingSet.cpp Simplify & microoptimize code. No intended functionality change. 2011-07-18 00:00:20 +00:00
FormattedStream.cpp
GraphWriter.cpp
Host.cpp Intel family 6 model 44 is Gulftown/Westmere-EP and doesn't have AVX. 2011-08-25 18:05:56 +00:00
IncludeFile.cpp
IntEqClasses.cpp
IntervalMap.cpp
IsInf.cpp
IsNAN.cpp
Makefile
ManagedStatic.cpp
Memory.cpp One more patch towards JIT support for Mips. 2011-09-14 03:00:41 +00:00
MemoryBuffer.cpp use 64-bit types instead of off_t/size_t to avoid the issue when 2011-09-15 23:13:00 +00:00
MemoryObject.cpp Report failure if there are less bytes than requested in a MemoryObject. 2011-08-27 07:45:46 +00:00
Mutex.cpp
Path.cpp ObjectFile: Add support for mach-o-style dSYM companion files. 2011-09-14 00:39:22 +00:00
PathV2.cpp Fix a minor bug in fs::create_directories. Patch by Albert Wong. 2011-09-16 18:36:31 +00:00
PluginLoader.cpp
PrettyStackTrace.cpp
Process.cpp
Program.cpp Have Program::Wait return -2 for crashed and timeouts instead of embedding 2011-05-21 00:56:46 +00:00
raw_os_ostream.cpp
raw_ostream.cpp Fix integer overflow bug in raw_ostream::write. This showed up as a 2011-08-28 03:30:02 +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
SearchForAddressOfSpecialSymbol.cpp
Signals.cpp
SmallPtrSet.cpp
SmallVector.cpp
SourceMgr.cpp Add new -d option to tblgen. It writes a make(1)-style dependency file. 2011-06-01 13:10:15 +00:00
Statistic.cpp
StringExtras.cpp move tier out of an anonymous namespace, it doesn't make sense 2011-07-21 06:21:31 +00:00
StringMap.cpp
StringPool.cpp
StringRef.cpp
system_error.cpp
SystemUtils.cpp
TargetRegistry.cpp Move TargetRegistry and TargetSelect from Target to Support where they belong. 2011-08-24 18:08:43 +00:00
Threading.cpp Now to chant the magical incantation that will exorcise the System library 2010-11-29 19:44:50 +00:00
ThreadLocal.cpp
Timer.cpp
TimeValue.cpp
ToolOutputFile.cpp
Triple.cpp Add AMDIL as valid target triple to LLVM. 2011-08-29 15:44:55 +00:00
Twine.cpp Add Twine support for characters, and switch twine to use a union internally 2011-07-24 20:44:30 +00:00
Valgrind.cpp Revert previous commit. It seems that whether casting to void 2011-07-02 13:14:22 +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