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llvm-project/llvm/lib/Support/Unix
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Fangrui Song 890e8c8f7e [Support] Add MemoryBuffer::dontNeedIfMmap 
On *NIX systems, this API calls madvise(MADV_DONTNEED) on read-only file mappings.
It should not be used on a writable buffer.
The API is used to implement ld.lld LTO memory saving trick (D116367).

Note: on read-only file mappings, Linux's MADV_DONTNEED semantics match POSIX
POSIX_MADV_DONTNEED and BSD systems' MADV_DONTNEED.

On Windows, VirtualAllocEx MEM_COMMIT/MEM_RESET have similar semantics
but are unfortunately not drop-in replacements. dontNeedIfMmap is currently a no-op.

Reviewed By: aganea

Differential Revision: https://reviews.llvm.org/D116366
2021-12-30 10:42:28 -08:00
..
COM.inc
…
DynamicLibrary.inc
…
Host.inc
…
Memory.inc
[Support][mips] Remove unnecessary includes from Memory.inc
2021-10-13 07:48:36 +03:00
Path.inc
[Support] Add MemoryBuffer::dontNeedIfMmap
2021-12-30 10:42:28 -08:00
Process.inc
[llvm] Replace LLVM_ATTRIBUTE_NORETURN with C++11 [[noreturn]]
2021-07-28 09:31:14 -07:00
Program.inc
[llvm] Use StringRef::contains (NFC)
2021-10-23 08:45:27 -07:00
README.txt
…
Signals.inc
Add LLVM_ATTRIBUTE_USED to fix problems which could be exposed by aggressive global pointer variable removal
2021-04-26 13:31:37 -07:00
Threading.inc
[Support] reorder Threading includes to avoid conflict with FreeBSD headers
2021-07-09 10:39:52 +01:00
ThreadLocal.inc
…
Unix.h
[llvm] Unix.h - Replace report_fatal_error(std::string) with report_fatal_error(Twine)
2021-10-06 12:13:40 +01:00
Watchdog.inc
…

README.txt 

llvm/lib/Support/Unix README
===========================

This directory provides implementations of the lib/System classes that
are common to two or more variants of UNIX. For example, the directory
structure underneath this directory could look like this:

Unix           - only code that is truly generic to all UNIX platforms
  Posix        - code that is specific to Posix variants of UNIX
  SUS          - code that is specific to the Single Unix Specification
  SysV         - code that is specific to System V variants of UNIX

As a rule, only those directories actually needing to be created should be
created. Also, further subdirectories could be created to reflect versions of
the various standards. For example, under SUS there could be v1, v2, and v3
subdirectories to reflect the three major versions of SUS.