llvm-6502

mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2024-10-01 10:57:21 +00:00

History

Benjamin Kramer 1222c5c121 Use access(2) instead of stat(2) to check if a file exists. Apart from being slightly cheaper, this fixes a real bug that hits 32 bit linux systems. When passing a file larger than 2G to be linked (which isn't that uncommon with large projects such as WebKit), clang's driver checks if the file exists but the file size doesn't fit in an off_t and stat(2) fails with EOVERFLOW. Clang then says that the file doesn't exist instead of passing it to the linker. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157891 91177308-0d34-0410-b5e6-96231b3b80d8		2012-06-02 16:28:09 +00:00
..
Unix	Use access(2) instead of stat(2) to check if a file exists.	2012-06-02 16:28:09 +00:00
Windows	Path::GetTemporaryDirectory(): Add an assertion if TempDirectory is alive, to check when someone would remove the tempdir.	2012-05-27 13:02:04 +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	Replace the hashing functions on APInt and APFloat with overloads of the	2012-03-04 12:02:57 +00:00
APInt.cpp	Move APInt::operator[] inline.	2012-03-14 00:38:15 +00:00
APSInt.cpp
Atomic.cpp
BlockFrequency.cpp
BranchProbability.cpp
circular_raw_ostream.cpp
CMakeLists.txt	platform support for counting column widths and checking isprint	2012-04-17 20:03:03 +00:00
CommandLine.cpp	Don't cast away constant qualifier.	2012-03-12 10:51:06 +00:00
ConstantRange.cpp	fix corner case in ConstantRange::intersectWith().	2012-05-18 00:14:36 +00:00
COPYRIGHT.regex
CrashRecoveryContext.cpp	move Signals to .rodata	2012-04-21 14:45:37 +00:00
DAGDeltaAlgorithm.cpp
DataExtractor.cpp
DataStream.cpp
Debug.cpp
DeltaAlgorithm.cpp
Disassembler.cpp
Dwarf.cpp	Lowercase the tag name to match the rest of dwarf.	2012-03-29 21:35:05 +00:00
DynamicLibrary.cpp
Errno.cpp
ErrorHandling.cpp
FileUtilities.cpp
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	Use the cpuid 64 bit flag to pick the default CPU name for an unknown model.	2012-05-09 17:47:03 +00:00
IncludeFile.cpp
IntEqClasses.cpp
IntervalMap.cpp
IntrusiveRefCntPtr.cpp
IsInf.cpp
IsNAN.cpp
LLVMBuild.txt
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
Makefile
ManagedStatic.cpp
Memory.cpp
MemoryBuffer.cpp	In MemoryBuffer::getOpenFile() make sure that the buffer is null-terminated if	2012-04-05 04:23:56 +00:00
MemoryObject.cpp
Mutex.cpp
Path.cpp
PathV2.cpp	[PathV2]: Fix bug in create_directories which caused infinite recursion on	2012-03-21 23:09:14 +00:00
PluginLoader.cpp
PrettyStackTrace.cpp
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
raw_os_ostream.cpp
raw_ostream.cpp	Reapply 'Add reverseColor to raw_ostream'.	2012-04-16 08:56:50 +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	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	Don't assume size_t is unsigned long long.	2012-05-07 18:12:42 +00:00
Statistic.cpp
StreamableMemoryObject.cpp
StringExtras.cpp
StringMap.cpp
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
ThreadLocal.cpp
Timer.cpp
TimeValue.cpp
ToolOutputFile.cpp
Triple.cpp	Remove the PTX back-end and all of its artifacts (triple, etc.)	2012-05-24 21:38:21 +00:00
Twine.cpp
Valgrind.cpp
YAMLParser.cpp	[Support/YAMLParser] Use rtrim on plain scalars.	2012-05-14 22:43:34 +00:00

README.txt.system

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