llvm/lib/Support/Unix
Frederich Munch f5d6c7c2d3 Refactor DynamicLibrary so searching for a symbol will have a defined order and
libraries are properly unloaded when llvm_shutdown is called.

Summary:
This was mostly affecting usage of the JIT, where storing the library handles in
a set made iteration unordered/undefined. This lead to disagreement between the
JIT and native code as to what the address and implementation of particularly on
Windows with stdlib functions:

JIT: putenv_s("TEST", "VALUE") // called msvcrt.dll, putenv_s
JIT: getenv("TEST") -> "VALUE" // called msvcrt.dll, getenv
Native: getenv("TEST") -> NULL // called ucrt.dll, getenv

Also fixed is the issue of DynamicLibrary::getPermanentLibrary(0,0) on Windows
not giving priority to the process' symbols as it did on Unix.

Reviewers: chapuni, v.g.vassilev, lhames

Reviewed By: lhames

Subscribers: danalbert, srhines, mgorny, vsk, llvm-commits

Differential Revision: https://reviews.llvm.org/D30107

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@301236 91177308-0d34-0410-b5e6-96231b3b80d8
2017-04-24 19:55:16 +00:00
..
COM.inc
DynamicLibrary.inc Refactor DynamicLibrary so searching for a symbol will have a defined order and 2017-04-24 19:55:16 +00:00
Host.inc
Memory.inc Correct mprotect page boundries to round up end page. Fixes PR30905. 2016-11-05 04:22:15 +00:00
Mutex.inc
Path.inc Make home_directory look in the password database in addition to $HOME. 2017-03-22 15:24:59 +00:00
Process.inc Zero-initialize chrono duration objects 2016-11-09 11:43:57 +00:00
Program.inc Revert "Fix Clang-tidy modernize-deprecated-headers warnings in remaining files; other minor fixes." 2016-04-05 20:45:04 +00:00
README.txt
RWMutex.inc
Signals.inc Fix detection of backtrace() availability on FreeBSD 2017-04-12 13:51:00 +00:00
Threading.inc Try to fix thread name truncation on non-Windows. 2017-03-04 18:53:09 +00:00
ThreadLocal.inc Revert "Fix Clang-tidy modernize-deprecated-headers warnings in remaining files; other minor fixes." 2016-04-05 20:45:04 +00:00
Unix.h Remove TimeValue usage from llvm/Support 2016-10-24 10:59:17 +00:00
Watchdog.inc

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.