winsup/ChangeLog:

* Makefile.common (COMPILE_CXX): Add support for per-file overrides
	to exclude $(nostdinc) and $(nostdincxx) from compiler flags.
	(COMPILE_CC): Likewise for $(nostdinc).

winsup/cygwin/ChangeLog:

	* Makefile.in (DLL_OFILES): Add libstdcxx_wrapper.o
	(libstdcxx_wrapper_CFLAGS): Add flags for new module.
	(_cygwin_crt0_common_STDINCFLAGS): Define per-file override.
	(libstdcxx_wrapper_STDINCFLAGS, cxx_STDINCFLAGS): Likewise.
	* cxx.cc: Include "cygwin-cxx.h".
	(operator new): Tweak prototype for full standards compliance.
	(operator new[]): Likewise.
	(operator new (nothrow)): New fallback function.
	(operator new[] (nothrow), operator delete (nothrow),
	operator delete[] (nothrow)): Likewise.
	(default_cygwin_cxx_malloc): New struct of pointers to the above,
	for final last-resort fallback default.
	* cygwin-cxx.h: New file.
	(struct per_process_cxx_malloc): Define.
	(default_cygwin_cxx_malloc): Declare extern.
	* cygwin.din (__wrap__ZdaPv): Export new wrapper.
	(__wrap__ZdaPvRKSt9nothrow_t, __wrap__ZdlPv,
	__wrap__ZdlPvRKSt9nothrow_t, __wrap__Znaj,
	__wrap__ZnajRKSt9nothrow_t, __wrap__Znwj,
	__wrap__ZnwjRKSt9nothrow_t): Likewise.
	* globals.cc (__cygwin_user_data): Init newly-repurposed 'forkee'
	field (now 'cxx_malloc') to point to default_cygwin_cxx_malloc.
	* libstdcxx_wrapper.cc: New file.
	(__wrap__ZdaPv, __wrap__ZdaPvRKSt9nothrow_t, __wrap__ZdlPv,
	__wrap__ZdlPvRKSt9nothrow_t, __wrap__Znaj,
	__wrap__ZnajRKSt9nothrow_t, __wrap__Znwj,
	__wrap__ZnwjRKSt9nothrow_t): Define wrapper functions for libstdc++
	malloc operators and their overrides.
	* winsup.h (default_cygwin_cxx_malloc): Declare extern.
	* include/cygwin/version.h (CYGWIN_VERSION_API_MINOR): Bump.
	* include/sys/cygwin.h (struct per_process_cxx_malloc): Forward
	declare here.
	(struct per_process::forkee): Rename and repurpose from this ...
	(struct per_process::cxx_malloc): ... to this.
	* lib/_cygwin_crt0_common.cc: Include cygwin-cxx.h.
	(WEAK): Define shorthand helper macro.
	(__cygwin_cxx_malloc): Define and populate with weak references
	to whatever libstdc++ malloc operators will be visible at final
	link time for Cygwin apps and dlls.
	(_cygwin_crt0_common): Always look up cygwin DLL's internal
	per_process data, and don't test for (impossible) failure.  Inherit
	any members of __cygwin_cxx_malloc that we don't have overrides
	for from the DLL's default and store the resulting overall set of
	overrides back into the DLL's global per_process data.
This commit is contained in:
Dave Korn 2009-07-07 20:12:44 +00:00
parent 6499c6e07b
commit b602bb90e2
13 changed files with 322 additions and 23 deletions

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@ -1,3 +1,9 @@
2009-07-07 Dave Korn <dave.korn.cygwin@gmail.com>
* Makefile.common (COMPILE_CXX): Add support for per-file overrides
to exclude $(nostdinc) and $(nostdincxx) from compiler flags.
(COMPILE_CC): Likewise for $(nostdinc).
2009-02-23 Sjors Gielen <mailinglist@dazjorz.com>
* Makefile.in: Add DESTDIR functionality.

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@ -130,9 +130,9 @@ ifeq (,${findstring $(gcc_libdir),$(CFLAGS) $(CXXFLAGS) $(CXX) $(CC)})
GCC_INCLUDE:=${subst //,/,-I$(gcc_libdir)/include}
endif
COMPILE_CXX=$(CXX) $c $(nostdincxx) $(nostdinc) $(ALL_CXXFLAGS) $(GCC_INCLUDE) \
-fno-rtti -fno-exceptions
COMPILE_CC=$(CC) $c $(nostdinc) $(ALL_CFLAGS) $(GCC_INCLUDE)
COMPILE_CXX=$(CXX) $c $(if $($(*F)_STDINCFLAGS),,$(nostdincxx) $(nostdinc)) \
$(ALL_CXXFLAGS) $(GCC_INCLUDE) -fno-rtti -fno-exceptions
COMPILE_CC=$(CC) $c $(if $($(*F)_STDINCFLAGS),,$(nostdinc)) $(ALL_CFLAGS) $(GCC_INCLUDE)
vpath %.a $(cygwin_build):$(w32api_lib):$(newlib_build)/libc:$(newlib_build)/libm

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@ -1,3 +1,50 @@
2009-07-07 Dave Korn <dave.korn.cygwin@gmail.com>
* Makefile.in (DLL_OFILES): Add libstdcxx_wrapper.o
(libstdcxx_wrapper_CFLAGS): Add flags for new module.
(_cygwin_crt0_common_STDINCFLAGS): Define per-file override.
(libstdcxx_wrapper_STDINCFLAGS, cxx_STDINCFLAGS): Likewise.
* cxx.cc: Include "cygwin-cxx.h".
(operator new): Tweak prototype for full standards compliance.
(operator new[]): Likewise.
(operator new (nothrow)): New fallback function.
(operator new[] (nothrow), operator delete (nothrow),
operator delete[] (nothrow)): Likewise.
(default_cygwin_cxx_malloc): New struct of pointers to the above,
for final last-resort fallback default.
* cygwin-cxx.h: New file.
(struct per_process_cxx_malloc): Define.
(default_cygwin_cxx_malloc): Declare extern.
* cygwin.din (__wrap__ZdaPv): Export new wrapper.
(__wrap__ZdaPvRKSt9nothrow_t, __wrap__ZdlPv,
__wrap__ZdlPvRKSt9nothrow_t, __wrap__Znaj,
__wrap__ZnajRKSt9nothrow_t, __wrap__Znwj,
__wrap__ZnwjRKSt9nothrow_t): Likewise.
* globals.cc (__cygwin_user_data): Init newly-repurposed 'forkee'
field (now 'cxx_malloc') to point to default_cygwin_cxx_malloc.
* libstdcxx_wrapper.cc: New file.
(__wrap__ZdaPv, __wrap__ZdaPvRKSt9nothrow_t, __wrap__ZdlPv,
__wrap__ZdlPvRKSt9nothrow_t, __wrap__Znaj,
__wrap__ZnajRKSt9nothrow_t, __wrap__Znwj,
__wrap__ZnwjRKSt9nothrow_t): Define wrapper functions for libstdc++
malloc operators and their overrides.
* winsup.h (default_cygwin_cxx_malloc): Declare extern.
* include/cygwin/version.h (CYGWIN_VERSION_API_MINOR): Bump.
* include/sys/cygwin.h (struct per_process_cxx_malloc): Forward
declare here.
(struct per_process::forkee): Rename and repurpose from this ...
(struct per_process::cxx_malloc): ... to this.
* lib/_cygwin_crt0_common.cc: Include cygwin-cxx.h.
(WEAK): Define shorthand helper macro.
(__cygwin_cxx_malloc): Define and populate with weak references
to whatever libstdc++ malloc operators will be visible at final
link time for Cygwin apps and dlls.
(_cygwin_crt0_common): Always look up cygwin DLL's internal
per_process data, and don't test for (impossible) failure. Inherit
any members of __cygwin_cxx_malloc that we don't have overrides
for from the DLL's default and store the resulting overall set of
overrides back into the DLL's global per_process data.
2009-07-07 Corinna Vinschen <corinna@vinschen.de>
* cygtls.cc (_cygtls::remove): Fix typo.

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@ -145,9 +145,9 @@ DLL_OFILES:=assert.o autoload.o bsdlib.o ctype.o cxx.o cygheap.o cygthread.o \
fhandler_termios.o fhandler_tty.o fhandler_virtual.o fhandler_windows.o \
fhandler_zero.o flock.o fnmatch.o fork.o fts.o ftw.o getopt.o glob.o \
glob_pattern_p.o globals.o grp.o heap.o hookapi.o inet_addr.o inet_network.o \
init.o ioctl.o ipc.o kernel32.o localtime.o lsearch.o malloc_wrapper.o \
minires-os-if.o minires.o miscfuncs.o mktemp.o mmap.o msg.o mount.o \
net.o netdb.o nfs.o nftw.o ntea.o passwd.o path.o pinfo.o pipe.o \
init.o ioctl.o ipc.o kernel32.o libstdcxx_wrapper.o localtime.o lsearch.o \
malloc_wrapper.o minires-os-if.o minires.o miscfuncs.o mktemp.o mmap.o msg.o \
mount.o net.o netdb.o nfs.o nftw.o ntea.o passwd.o path.o pinfo.o pipe.o \
poll.o posix_ipc.o pthread.o random.o regcomp.o regerror.o regexec.o \
regfree.o registry.o resource.o rexec.o rcmd.o scandir.o sched.o \
sec_acl.o sec_auth.o sec_helper.o security.o select.o sem.o \
@ -268,6 +268,7 @@ fhandler_windows_CFLAGS:=-fomit-frame-pointer
fhandler_zero_CFLAGS:=-fomit-frame-pointer
flock_CFLAGS:=-fomit-frame-pointer
grp_CFLAGS:=-fomit-frame-pointer
libstdcxx_wrapper_CFLAGS:=-fomit-frame-pointer
malloc_CFLAGS:=-fomit-frame-pointer
malloc_wrapper_CFLAGS:=-fomit-frame-pointer
miscfuncs_CFLAGS:=-fomit-frame-pointer
@ -285,6 +286,10 @@ sysconf_CFLAGS:=-fomit-frame-pointer
uinfo_CFLAGS:=-fomit-frame-pointer
endif
_cygwin_crt0_common_STDINCFLAGS:=yes
libstdcxx_wrapper_STDINCFLAGS:=yes
cxx_STDINCFLAGS:=yes
.PHONY: all force dll_ofiles install all_target install_target all_host install_host \
install install-libs install-headers

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@ -11,9 +11,14 @@ details. */
#if (__GNUC__ >= 3)
#include "winsup.h"
#include "cygwin-cxx.h"
/* These implementations of operators new and delete are used internally by
the DLL, and are kept separate from the user's/libstdc++'s versions by
use of LD's --wrap option. */
void *
operator new (size_t s)
operator new (std::size_t s)
{
void *p = calloc (1, s);
return p;
@ -26,7 +31,7 @@ operator delete (void *p)
}
void *
operator new[] (size_t s)
operator new[] (std::size_t s)
{
return ::operator new (s);
}
@ -37,6 +42,34 @@ operator delete[] (void *p)
::operator delete (p);
}
/* Nothrow versions, provided only for completeness in the fallback array. */
void *
operator new (std::size_t s, const std::nothrow_t &)
{
void *p = calloc (1, s);
return p;
}
void
operator delete (void *p, const std::nothrow_t &)
{
free (p);
}
void *
operator new[] (std::size_t s, const std::nothrow_t &nt)
{
return ::operator new (s, nt);
}
void
operator delete[] (void *p, const std::nothrow_t &nt)
{
::operator delete (p, nt);
}
extern "C" void
__cxa_pure_virtual (void)
{
@ -52,4 +85,21 @@ extern "C" void
__cxa_guard_release ()
{
}
/* These routines are made available as last-resort fallbacks
for the application. Should not be used in practice. */
struct per_process_cxx_malloc default_cygwin_cxx_malloc =
{
&(operator new),
&(operator new[]),
&(operator delete),
&(operator delete[]),
&(operator new),
&(operator new[]),
&(operator delete),
&(operator delete[]),
};
#endif

37
winsup/cygwin/cygwin-cxx.h Executable file
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@ -0,0 +1,37 @@
/* cygwin-cxx.h
Copyright 2009 Red Hat, Inc.
This file is part of Cygwin.
This software is a copyrighted work licensed under the terms of the
Cygwin license. Please consult the file "CYGWIN_LICENSE" for
details. */
#ifndef _CYGWIN_CXX_H
#define _CYGWIN_CXX_H
#ifndef __cplusplus
#error This header should not be included by C source files.
#endif
/* Files including this header must override -nostdinc++ */
#include <new>
/* This is an optional struct pointed to by per_process if it exists. */
struct per_process_cxx_malloc
{
void *(*oper_new) (std::size_t);
void *(*oper_new__) (std::size_t);
void (*oper_delete) (void *);
void (*oper_delete__) (void *);
void *(*oper_new_nt) (std::size_t, const std::nothrow_t &);
void *(*oper_new___nt) (std::size_t, const std::nothrow_t &);
void (*oper_delete_nt) (void *, const std::nothrow_t &);
void (*oper_delete___nt) (void *, const std::nothrow_t &);
};
/* Defined in cxx.cc */
extern struct per_process_cxx_malloc default_cygwin_cxx_malloc;
#endif /* _CYGWIN_CXX_H */

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@ -1808,3 +1808,11 @@ y1 NOSIGFE
y1f NOSIGFE
yn NOSIGFE
ynf NOSIGFE
__wrap__ZdaPv NOSIGFE # void operator delete[](void *p) throw()
__wrap__ZdaPvRKSt9nothrow_t NOSIGFE # void operator delete[](void *p, const std::nothrow_t &nt) throw()
__wrap__ZdlPv NOSIGFE # void operator delete(void *p) throw()
__wrap__ZdlPvRKSt9nothrow_t NOSIGFE # void operator delete(void *p, const std::nothrow_t &nt) throw()
__wrap__Znaj NOSIGFE # void *operator new[](std::size_t sz) throw (std::bad_alloc)
__wrap__ZnajRKSt9nothrow_t NOSIGFE # void *operator new[](std::size_t sz, const std::nothrow_t &nt) throw()
__wrap__Znwj NOSIGFE # void *operator new(std::size_t sz) throw (std::bad_alloc)
__wrap__ZnwjRKSt9nothrow_t NOSIGFE # void *operator new(std::size_t sz, const std::nothrow_t &nt) throw()

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@ -98,7 +98,7 @@ extern "C"
/* premain */ {NULL, NULL, NULL, NULL},
/* run_ctors_p */ 0,
/* unused */ {0, 0, 0, 0, 0, 0, 0},
/* UNUSED forkee */ 0,
/* cxx_malloc */ &default_cygwin_cxx_malloc,
/* hmodule */ NULL,
/* api_major */ CYGWIN_VERSION_API_MAJOR,
/* api_minor */ CYGWIN_VERSION_API_MINOR,

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@ -365,12 +365,13 @@ details. */
209: Export wordexp, wordfree.
210: New ctype layout using variable ctype pointer. Export __ctype_ptr__.
211: Export fpurge, mkstemps.
212: Add and export libstdc++ malloc wrappers.
*/
/* Note that we forgot to bump the api for ualarm, strtoll, strtoull */
#define CYGWIN_VERSION_API_MAJOR 0
#define CYGWIN_VERSION_API_MINOR 211
#define CYGWIN_VERSION_API_MINOR 212
/* There is also a compatibity version number associated with the
shared memory regions. It is incremented when incompatible

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@ -194,6 +194,8 @@ enum
class MTinterface;
#endif
struct per_process_cxx_malloc;
struct per_process
{
char *initial_sp;
@ -238,9 +240,8 @@ struct per_process
DWORD unused[7];
/* Non-zero means the task was forked. The value is the pid.
Inherited from parent. */
int forkee;
/* Pointers to real operator new/delete functions for forwarding. */
struct per_process_cxx_malloc *cxx_malloc;
HMODULE hmodule;

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@ -10,8 +10,34 @@ details. */
#include "winsup.h"
#include "crt0.h"
#include "cygwin-cxx.h"
/* Avoid an info message from linker when linking applications. */
/* Weaken these declarations so the references don't pull in C++ dependencies
unnecessarily. */
#define WEAK __attribute__ ((weak))
/* Use asm names to bypass the --wrap that is being applied to redirect all other
references to these operators toward the redirectors in the Cygwin DLL; this
way we can record what definitions were visible at final link time but still
send all calls to the redirectors. */
extern WEAK void *operator new(std::size_t sz) throw (std::bad_alloc)
__asm__ ("___real__Znwj");
extern WEAK void *operator new[](std::size_t sz) throw (std::bad_alloc)
__asm__ ("___real__Znaj");
extern WEAK void operator delete(void *p) throw()
__asm__ ("___real__ZdlPv ");
extern WEAK void operator delete[](void *p) throw()
__asm__ ("___real__ZdaPv");
extern WEAK void *operator new(std::size_t sz, const std::nothrow_t &nt) throw()
__asm__ ("___real__ZnwjRKSt9nothrow_t");
extern WEAK void *operator new[](std::size_t sz, const std::nothrow_t &nt) throw()
__asm__ ("___real__ZnajRKSt9nothrow_t");
extern WEAK void operator delete(void *p, const std::nothrow_t &nt) throw()
__asm__ ("___real__ZdlPvRKSt9nothrow_t");
extern WEAK void operator delete[](void *p, const std::nothrow_t &nt) throw()
__asm__ ("___real__ZdaPvRKSt9nothrow_t");
/* Avoid an info message from linker when linking applications. */
extern __declspec(dllimport) struct _reent *_impure_ptr;
#undef environ
@ -25,6 +51,14 @@ int main (int, char **, char **);
int _fmode;
void _pei386_runtime_relocator ();
struct per_process_cxx_malloc __cygwin_cxx_malloc =
{
&(operator new), &(operator new[]),
&(operator delete), &(operator delete[]),
&(operator new), &(operator new[]),
&(operator delete), &(operator delete[])
};
/* Set up pointers to various pieces so the dll can then use them,
and then jump to the dll. */
@ -33,17 +67,15 @@ _cygwin_crt0_common (MainFunc f, per_process *u)
{
/* This is used to record what the initial sp was. The value is needed
when copying the parent's stack to the child during a fork. */
DWORD newu;
per_process *newu = (per_process *) cygwin_internal (CW_USER_DATA);
int uwasnull;
if (u != NULL)
uwasnull = 0; /* Caller allocated space for per_process structure */
else if ((newu = cygwin_internal (CW_USER_DATA)) == (DWORD) -1)
return 0;
uwasnull = 0; /* Caller allocated space for per_process structure. */
else
{
u = (per_process *) newu; /* Using DLL built-in per_process */
uwasnull = 1; /* Remember for later */
u = newu; /* Using DLL built-in per_process. */
uwasnull = 1; /* Remember for later. */
}
/* The version numbers are the main source of compatibility checking.
@ -64,8 +96,6 @@ _cygwin_crt0_common (MainFunc f, per_process *u)
else
u->impure_ptr_ptr = &_impure_ptr; /* Older DLLs need this. */
u->forkee = 0; /* This should only be set in dcrt0.cc
when the process is actually forked */
u->main = f;
/* These functions are executed prior to main. They are just stubs unless the
@ -84,7 +114,28 @@ _cygwin_crt0_common (MainFunc f, per_process *u)
u->realloc = &realloc;
u->calloc = &calloc;
/* Setup the module handle so fork can get the path name. */
/* Likewise for the C++ memory operators - if any. */
if (newu && newu->cxx_malloc)
{
/* Inherit what we don't override. */
#define CONDITIONALLY_OVERRIDE(MEMBER) \
if (!__cygwin_cxx_malloc.MEMBER) \
__cygwin_cxx_malloc.MEMBER = newu->cxx_malloc->MEMBER;
CONDITIONALLY_OVERRIDE(oper_new);
CONDITIONALLY_OVERRIDE(oper_new__);
CONDITIONALLY_OVERRIDE(oper_delete);
CONDITIONALLY_OVERRIDE(oper_delete__);
CONDITIONALLY_OVERRIDE(oper_new_nt);
CONDITIONALLY_OVERRIDE(oper_new___nt);
CONDITIONALLY_OVERRIDE(oper_delete_nt);
CONDITIONALLY_OVERRIDE(oper_delete___nt);
}
/* Now update the resulting set into the global redirectors. */
if (newu)
newu->cxx_malloc = &__cygwin_cxx_malloc;
/* Setup the module handle so fork can get the path name. */
u->hmodule = GetModuleHandle (0);
/* variables for fork */

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@ -0,0 +1,90 @@
/* libstdcxx_wrapper.cc
Copyright 2009 Red Hat, Inc.
This file is part of Cygwin.
This software is a copyrighted work licensed under the terms of the
Cygwin license. Please consult the file "CYGWIN_LICENSE" for
details. */
/* We provide these stubs to call into a user's
provided ONDEE replacement if there is one - otherwise
it must fall back to the standard libstdc++ version. */
#include "winsup.h"
#include "cygwin-cxx.h"
#include "perprocess.h"
/* We are declaring asm names for the functions we define here, as we want
to define the wrappers in this file. GCC links everything with wrappers
around the standard C++ memory management operators; these are the wrappers,
but we want the compiler to know they are the malloc operators and not have
it think they're just any old function matching 'extern "C" _wrap_*'. */
extern void *operator new(std::size_t sz) throw (std::bad_alloc)
__asm__ ("___wrap__Znwj");
extern void *operator new[](std::size_t sz) throw (std::bad_alloc)
__asm__ ("___wrap__Znaj");
extern void operator delete(void *p) throw()
__asm__ ("___wrap__ZdlPv ");
extern void operator delete[](void *p) throw()
__asm__ ("___wrap__ZdaPv");
extern void *operator new(std::size_t sz, const std::nothrow_t &nt) throw()
__asm__ ("___wrap__ZnwjRKSt9nothrow_t");
extern void *operator new[](std::size_t sz, const std::nothrow_t &nt) throw()
__asm__ ("___wrap__ZnajRKSt9nothrow_t");
extern void operator delete(void *p, const std::nothrow_t &nt) throw()
__asm__ ("___wrap__ZdlPvRKSt9nothrow_t");
extern void operator delete[](void *p, const std::nothrow_t &nt) throw()
__asm__ ("___wrap__ZdaPvRKSt9nothrow_t");
extern void *
operator new(std::size_t sz) throw (std::bad_alloc)
{
return (*user_data->cxx_malloc->oper_new) (sz);
}
extern void *
operator new[](std::size_t sz) throw (std::bad_alloc)
{
return (*user_data->cxx_malloc->oper_new__) (sz);
}
extern void
operator delete(void *p) throw()
{
(*user_data->cxx_malloc->oper_delete) (p);
}
extern void
operator delete[](void *p) throw()
{
(*user_data->cxx_malloc->oper_delete__) (p);
}
extern void *
operator new(std::size_t sz, const std::nothrow_t &nt) throw()
{
return (*user_data->cxx_malloc->oper_new_nt) (sz, nt);
}
extern void *
operator new[](std::size_t sz, const std::nothrow_t &nt) throw()
{
return (*user_data->cxx_malloc->oper_new___nt) (sz, nt);
}
extern void
operator delete(void *p, const std::nothrow_t &nt) throw()
{
(*user_data->cxx_malloc->oper_delete_nt) (p, nt);
}
extern void
operator delete[](void *p, const std::nothrow_t &nt) throw()
{
(*user_data->cxx_malloc->oper_delete___nt) (p, nt);
}

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@ -183,6 +183,9 @@ extern "C" int dll_dllcrt0 (HMODULE, per_process *);
extern "C" int dll_noncygwin_dllcrt0 (HMODULE, per_process *);
void __stdcall do_exit (int) __attribute__ ((regparm (1), noreturn));
/* libstdc++ malloc operator wrapper support. */
extern struct per_process_cxx_malloc default_cygwin_cxx_malloc;
/* UID/GID */
void uinfo_init ();