Red Hat's newlib C library with support for Jehanne
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Corinna Vinschen 33297d810d Cygwin: dlfcn: Fix reference counting
The original dll_init code was living under the wrong assumption that
dll_dllcrt0_1 and in turn dll_list::alloc will be called for each
LoadLibrary call.  The same wrong assumption was made for
cygwin_detach_dll/dll_list::detach called via FreeLibrary.

In reality, dll_dllcrt0_1 gets only called once at first LoadLibrary
and cygwin_detach_dll once at last FreeLibrary.

In effect, reference counting for DLLs was completely broken after fork:

  parent:
    l1 = dlopen ("lib1");  // LoadLibrary, LoadCount = 1
    l2 = dlopen ("lib1");  // LoadLibrary, LoadCount = 2

    fork ();               // LoadLibrary in the child, LoadCount = 1!
      child:
        dlclose (l1);      // FreeLibrary actually frees the lib
        x = dlsym (l2);    // SEGV

* Move reference counting to dlopen/dlclose since only those functions
  have to keep track of loading/unloading DLLs in the application context.

* Remove broken accounting code from dll_list::alloc and dll_list::detach.

* Fix error handling in dlclose.

Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
2017-03-21 14:31:03 +01:00
config Sync with upstream gcc. 2016-06-23 15:54:55 -04:00
etc Remove spurious empty line in changelog entry. 2016-03-22 10:29:22 +01:00
include Sync with upstream gcc. 2016-06-23 15:54:55 -04:00
libgloss Fix elf-nano.specs to work without -save-temps 2017-02-15 16:31:16 +01:00
newlib libc/string/strsignal.c: Use of || not && lead to dead code. 2017-03-15 12:04:34 -05:00
texinfo
winsup Cygwin: dlfcn: Fix reference counting 2017-03-21 14:31:03 +01:00
.drone.yml Continuous Integration: Add Tea CI build configuration. 2016-06-28 13:42:59 +02:00
.gitattributes Add .gitattributes 2015-03-09 20:53:11 +01:00
.gitignore Add *.swp (Vim swap files) to .gitignore 2015-03-17 12:03:30 +01:00
COPYING
COPYING.LIB Sync toplevel with upstream GCC. 2016-03-22 10:25:20 +01:00
COPYING.LIBGLOSS Add Synopsys license for newlib and libgloss 2015-11-12 14:16:32 +01:00
COPYING.NEWLIB Add port for Phoenix-RTOS in common configure files. 2016-05-09 15:23:58 -04:00
COPYING3
COPYING3.LIB
ChangeLog Sync with upstream gcc. 2016-06-23 15:54:55 -04:00
MAINTAINERS MAINTAINERS: clarify policy with config/ (and other top level files) 2012-05-12 03:10:17 +00:00
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Makefile.in Add missing OBJCOPY variable to Makefile.in 2016-06-26 17:27:03 +01:00
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README
README-maintainer-mode Cleanups after the update to Autoconf 2.64, Automake 1.11. 2009-08-22 17:08:06 +00:00
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config.rpath Remove freebsd1 from libtool.m4 macros and config.rpath. 2011-02-13 21:00:08 +00:00
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ltsugar.m4
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lt~obsolete.m4 Sync Libtool from GCC. 2010-01-09 21:11:32 +00:00
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setup.com 2009-09-01 Tristan Gingold <gingold@adacore.com> 2009-09-01 13:38:26 +00:00
src-release * src-release (do-proto-toplevel): Support subdir-path-prefixed 2013-10-15 20:45:52 +00:00
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ylwrap Sync toplevel with upstream GCC. 2016-03-22 10:25:20 +01:00

README

		   README for GNU development tools

This directory contains various GNU compilers, assemblers, linkers, 
debuggers, etc., plus their support routines, definitions, and documentation.

If you are receiving this as part of a GDB release, see the file gdb/README.
If with a binutils release, see binutils/README;  if with a libg++ release,
see libg++/README, etc.  That'll give you info about this
package -- supported targets, how to use it, how to report bugs, etc.

It is now possible to automatically configure and build a variety of
tools with one command.  To build all of the tools contained herein,
run the ``configure'' script here, e.g.:

	./configure 
	make

To install them (by default in /usr/local/bin, /usr/local/lib, etc),
then do:
	make install

(If the configure script can't determine your type of computer, give it
the name as an argument, for instance ``./configure sun4''.  You can
use the script ``config.sub'' to test whether a name is recognized; if
it is, config.sub translates it to a triplet specifying CPU, vendor,
and OS.)

If you have more than one compiler on your system, it is often best to
explicitly set CC in the environment before running configure, and to
also set CC when running make.  For example (assuming sh/bash/ksh):

	CC=gcc ./configure
	make

A similar example using csh:

	setenv CC gcc
	./configure
	make

Much of the code and documentation enclosed is copyright by
the Free Software Foundation, Inc.  See the file COPYING or
COPYING.LIB in the various directories, for a description of the
GNU General Public License terms under which you can copy the files.

REPORTING BUGS: Again, see gdb/README, binutils/README, etc., for info
on where and how to report problems.