llvm-6502/lib/Support
2011-12-01 20:58:30 +00:00
..
Unix rename getHostTriple into getDefaultTargetTriple 2011-11-01 21:32:20 +00:00
Windows [Win32] Catch exceptions (eg. segfault) on waiting for invoked clang from the driver. 2011-11-29 07:47:04 +00:00
Allocator.cpp
APFloat.cpp Add back a line I deleted by accident in r145141. Fixes uninitialized variable warnings and runtime failures. 2011-11-28 18:50:37 +00:00
APInt.cpp Fix unreachable return & simplify some branches. 2011-12-01 20:58:30 +00:00
APSInt.cpp
Atomic.cpp
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
CommandLine.cpp Add some missing anchors. 2011-12-01 08:00:17 +00:00
ConstantRange.cpp Make ConstantRange::truncate a bit more efficient. 2011-11-24 17:24:33 +00:00
COPYRIGHT.regex
CrashRecoveryContext.cpp
DAGDeltaAlgorithm.cpp
DataExtractor.cpp
Debug.cpp
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
DynamicLibrary.cpp
Errno.cpp
ErrorHandling.cpp
FileUtilities.cpp
FoldingSet.cpp
FormattedStream.cpp
GraphWriter.cpp
Host.cpp Autodetect bulldozers. 2011-12-01 18:24:17 +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
IsInf.cpp
IsNAN.cpp
LLVMBuild.txt build: Add initial cut at LLVMBuild.txt files. 2011-11-03 18:53:17 +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 The Mips specific function for instruction cache invalidation cannot be 2011-10-10 18:41:02 +00:00
MemoryBuffer.cpp Add configure checking for pread(2) and use it to save a syscall when reading files. 2011-11-22 12:31:53 +00:00
MemoryObject.cpp
Mutex.cpp rename ENABLE_THREADS to LLVM_ENABLE_THREADS 2011-11-28 00:48:58 +00:00
Path.cpp Remove a couple unused methods. PR11201. 2011-11-01 05:11:01 +00:00
PathV2.cpp
PluginLoader.cpp
PrettyStackTrace.cpp Add more initializers to quiet a clang warning. 2011-10-05 05:00:26 +00:00
Process.cpp
Program.cpp
raw_os_ostream.cpp
raw_ostream.cpp Avoid undefined behavior in signed integer negation. Patch by Ahmed Charles. 2011-10-13 22:49:56 +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 rename ENABLE_THREADS to LLVM_ENABLE_THREADS 2011-11-28 00:48:58 +00:00
SearchForAddressOfSpecialSymbol.cpp
Signals.cpp
SmallPtrSet.cpp
SmallVector.cpp
SourceMgr.cpp remove the dead 'ShowLine' argument from SMDiagnostic. 2011-10-16 05:47:55 +00:00
Statistic.cpp Let printf do the formatting instead aligning strings ourselves. 2011-10-16 16:30:34 +00:00
StringExtras.cpp
StringMap.cpp
StringPool.cpp
StringRef.cpp Fix a typo. 2011-11-06 20:36:50 +00:00
system_error.cpp
SystemUtils.cpp
TargetRegistry.cpp rename getHostTriple into getDefaultTargetTriple 2011-11-01 21:32:20 +00:00
Threading.cpp rename ENABLE_THREADS to LLVM_ENABLE_THREADS 2011-11-28 00:48:58 +00:00
ThreadLocal.cpp rename ENABLE_THREADS to LLVM_ENABLE_THREADS 2011-11-28 00:48:58 +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 Remove the Alpha backend. 2011-10-27 22:56:32 +00:00
Twine.cpp
Valgrind.cpp Don't define these unless we plan to use them. 2011-11-28 22:14:02 +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