llvm-6502/lib/Support
Nick Kledzik adfe2637b8 Initial commit of new FileOutputBuffer support class.
Since the llvm::sys::fs::map_file_pages() support function it relies on
is not yet implemented on Windows, the unit tests for FileOutputBuffer 
are currently conditionalized to run only on unix.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161099 91177308-0d34-0410-b5e6-96231b3b80d8
2012-08-01 02:29:50 +00:00
..
Unix Process: Add sys::Process::FileDescriptorHasColors(). 2012-07-20 18:29:38 +00:00
Windows Try to unbreak the windows build. 2012-07-20 19:49:33 +00:00
Allocator.cpp BumpPtrAllocator: Make sure threshold cannot be initialized with a value smaller than the slab size. 2012-03-01 22:10:16 +00:00
APFloat.cpp Don't add null characters to the end of the APFloat string buffer. 2012-07-25 18:04:24 +00:00
APInt.cpp PR13326: Fix a subtle edge case in the udiv -> magic multiply generator. 2012-07-11 18:31:59 +00:00
APSInt.cpp
Atomic.cpp drop unneeded config.h includes 2011-12-22 23:04:07 +00:00
BlockFrequency.cpp BlockFrequency: Use a smarter overflow check. 2011-10-27 16:38:50 +00:00
BranchProbability.cpp Print branch probabilities as percentages. 2011-10-23 11:32:54 +00:00
circular_raw_ostream.cpp
CMakeLists.txt Initial commit of new FileOutputBuffer support class. 2012-08-01 02:29:50 +00:00
CommandLine.cpp Remove tabs. 2012-07-19 00:15:11 +00:00
ConstantRange.cpp make ConstantRange::zeroExtend() optimal 2012-07-23 20:33:29 +00:00
COPYRIGHT.regex
CrashRecoveryContext.cpp move Signals to .rodata 2012-04-21 14:45:37 +00:00
DAGDeltaAlgorithm.cpp Adding missing anchor to DATDeltaAlgorithm. 2011-12-07 06:44:23 +00:00
DataExtractor.cpp Remove extra semi-colons. 2012-02-22 17:25:00 +00:00
DataStream.cpp Change default error_code ctor to a 'named ctor' so it's more self-documenting. 2012-02-09 19:24:12 +00:00
Debug.cpp Typos. 2012-07-27 21:41:59 +00:00
DeltaAlgorithm.cpp
Disassembler.cpp Clean up a few references to System/. We still have docs/SystemLibrary.html 2011-10-11 20:02:52 +00:00
Dwarf.cpp Lowercase the tag name to match the rest of dwarf. 2012-03-29 21:35:05 +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 llvm/lib/Support/Errno.cpp: [Win32] Fix usage of strerror_s(). 2012-06-24 03:51:04 +00:00
ErrorHandling.cpp
FileOutputBuffer.cpp Initial commit of new FileOutputBuffer support class. 2012-08-01 02:29:50 +00:00
FileUtilities.cpp Change default error_code ctor to a 'named ctor' so it's more self-documenting. 2012-02-09 19:24:12 +00:00
FoldingSet.cpp FoldingSet: Push the hash through FoldingSetTraits::Equals, so clients can use it. 2012-04-11 14:06:47 +00:00
FormattedStream.cpp
GraphWriter.cpp Fix -Wcovered-switch-default warning. 2012-05-24 07:51:46 +00:00
Hashing.cpp Add the source file with trivial definitions in it that was missing from 2012-03-01 18:58:59 +00:00
Host.cpp Adds the family codes for the Midview Atom processors so that the 2012-07-19 19:05:37 +00:00
IncludeFile.cpp Clean up a few references to System/. We still have docs/SystemLibrary.html 2011-10-11 20:02:52 +00:00
IntEqClasses.cpp
IntervalMap.cpp
IntrusiveRefCntPtr.cpp Unweaken vtables as per http://llvm.org/docs/CodingStandards.html#ll_virtual_anch 2011-12-20 02:50:00 +00:00
IsInf.cpp
IsNAN.cpp
LLVMBuild.txt LLVMBuild: Remove trailing newline, which irked me. 2011-12-12 19:48:00 +00:00
Locale.cpp platform support for counting column widths and checking isprint 2012-04-17 20:03:03 +00:00
LocaleGeneric.inc C++ has newlines at the end of files (including include files). 2012-04-17 23:46:51 +00:00
LocaleWindows.inc platform support for counting column widths and checking isprint 2012-04-17 20:03:03 +00:00
LocaleXlocale.inc fix error check in assert 2012-04-18 00:40:23 +00:00
LockFileManager.cpp Move Clang's file-level locking facility over to LLVM's support 2012-01-29 20:15:10 +00:00
Makefile
ManagedStatic.cpp Add support for tsan annotations (thread sanitizer, a valgrind-based tool). 2011-11-14 20:50:16 +00:00
Memory.cpp Fixed few warnings. 2012-07-12 20:45:36 +00:00
MemoryBuffer.cpp In MemoryBuffer::getOpenFile() don't verify that the mmap'ed 2012-07-11 20:59:20 +00:00
MemoryObject.cpp Make MemoryObject accessor members const again 2012-02-29 01:09:06 +00:00
Mutex.cpp Persuade GCC that there is nothing worth warning about here (there isn't). 2012-02-05 14:20:11 +00:00
Path.cpp PR13013: ELF Type identification fails for MSB type ELF files. 2012-06-25 14:48:43 +00:00
PathV2.cpp [Support/PathV2] Fix out of bounds access in identify_magic when the file is empty. 2012-06-19 05:29:57 +00:00
PluginLoader.cpp
PrettyStackTrace.cpp Add more initializers to quiet a clang warning. 2011-10-05 05:00:26 +00:00
Process.cpp Support/Process: Move llvm::sys::Process::GetRandomNumber() from Process.cpp to Unix/Process.inc. 2012-05-06 08:24:18 +00:00
Program.cpp Support/Program: Make Change<stream>ToBinary return error_code. 2011-12-13 23:16:49 +00:00
raw_os_ostream.cpp
raw_ostream.cpp raw_ostream: Add a has_colors() method. 2012-07-20 18:29:41 +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 Remove dead code. 2012-01-15 01:09:13 +00:00
SearchForAddressOfSpecialSymbol.cpp These symbols appear to be visible by SearchForAddressOfSymbol and no longer 2011-09-27 20:01:41 +00:00
Signals.cpp
SmallPtrSet.cpp SmallPtrSet: Reuse DenseMapInfo's pointer hash function instead of inventing a bad one ourselves. 2012-04-18 10:37:32 +00:00
SmallVector.cpp
SourceMgr.cpp SourceMgr: Use has_colors() instead of just is_displayed() before trying to use 2012-07-20 18:29:44 +00:00
Statistic.cpp Silence tsan false-positives (tsan can't track things which are only safe due to 2011-12-05 23:07:05 +00:00
StreamableMemoryObject.cpp Don't assert when given an empty range. 2012-06-20 00:16:40 +00:00
StringExtras.cpp Move the implementation of StringRef::split out of StringExtras.cpp 2012-02-21 12:00:25 +00:00
StringMap.cpp Fix PR13148, an inf-loop in StringMap. 2012-06-19 17:40:35 +00:00
StringPool.cpp
StringRef.cpp [Support/StringRef] Add find_last_not_of and {r,l,}trim. 2012-05-11 22:08:50 +00:00
system_error.cpp
SystemUtils.cpp
TargetRegistry.cpp Fix it so llvm-objdump -arch does accept x86 and x86-64 as valid arch names. 2012-05-08 23:38:45 +00:00
Threading.cpp rename ENABLE_THREADS to LLVM_ENABLE_THREADS 2011-11-28 00:48:58 +00:00
ThreadLocal.cpp Fix ThreadLocalImpl::getInstance for --disable-threads. 2012-06-26 17:13:58 +00:00
Timer.cpp Add more PRI.64 macros for MSVC and use them throughout the codebase. 2011-11-05 08:57:40 +00:00
TimeValue.cpp
ToolOutputFile.cpp
Triple.cpp Enable automatic GCC<->LLVM intrinsic translation for mips. 2012-06-28 19:09:53 +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 Don't define these unless we plan to use them. 2011-11-28 22:14:02 +00:00
YAMLParser.cpp Remove unused private member variables uncovered by the recent changes to clang's -Wunused-private-field. 2012-07-20 22:05:57 +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