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authorUlrich Drepper <drepper@redhat.com>1999-12-27 21:50:29 +0000
committerUlrich Drepper <drepper@redhat.com>1999-12-27 21:50:29 +0000
commitc41041bc2f84eb8f44ff36c3d14e55944185e665 (patch)
treec545add82b7ed403c5494a121f7f56ae724601c7 /stdlib
parent8892c471bf1078c28adb239a4866a01356651843 (diff)
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Update.
1999-12-17 Andreas Jaeger <aj@suse.de> * stdlib/Versions: Export __cxa_atexit and __cxa_finalize. 1999-12-16 Mark Mitchell <mark@codesourcery.com> * stdlib/Makefile (routines): Add cxa_atexit and cxa_finalize. * stdlib/exit.h (flavor): Add ef_cxa. (exit_function): Add cxa variant. * stdlib/exit.c (exit): Handle ef_cxa exit functions. * stdlib/cxa_atexit.c: New file. * stdlib/cxa_finalize.c: New file.
Diffstat (limited to 'stdlib')
-rw-r--r--stdlib/Makefile2
-rw-r--r--stdlib/Versions4
-rw-r--r--stdlib/cxa_atexit.c38
-rw-r--r--stdlib/cxa_finalize.c44
-rw-r--r--stdlib/exit.c3
-rw-r--r--stdlib/exit.h22
6 files changed, 110 insertions, 3 deletions
diff --git a/stdlib/Makefile b/stdlib/Makefile
index ee7039f8c2..29adea4425 100644
--- a/stdlib/Makefile
+++ b/stdlib/Makefile
@@ -29,7 +29,7 @@ routines := \
abort \
bsearch qsort msort \
getenv putenv setenv secure-getenv \
- exit on_exit atexit \
+ exit on_exit atexit cxa_atexit cxa_finalize \
abs labs llabs \
div ldiv lldiv \
mblen mbstowcs mbtowc wcstombs wctomb \
diff --git a/stdlib/Versions b/stdlib/Versions
index 9536e3240e..034125a200 100644
--- a/stdlib/Versions
+++ b/stdlib/Versions
@@ -90,4 +90,8 @@ libc {
# i*
imaxabs; imaxdiv;
}
+ GLIBC_2.1.3 {
+ # used by new G++ ABI
+ __cxa_atexit; __cxa_finalize;
+ }
}
diff --git a/stdlib/cxa_atexit.c b/stdlib/cxa_atexit.c
new file mode 100644
index 0000000000..180d74a54d
--- /dev/null
+++ b/stdlib/cxa_atexit.c
@@ -0,0 +1,38 @@
+/* Copyright (C) 1999 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public License as
+ published by the Free Software Foundation; either version 2 of the
+ License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+#include <stdlib.h>
+#include "exit.h"
+
+/* Register a function to be called by exit or when a shared library
+ is unloaded. This function is only called from code generated by
+ the C++ compiler. */
+int
+__cxa_atexit (void (*func) (void *), void *arg, void *d)
+{
+ struct exit_function *new = __new_exitfn ();
+
+ if (new == NULL)
+ return -1;
+
+ new->flavor = ef_cxa;
+ new->func.cxa.fn = func;
+ new->func.cxa.arg = arg;
+ new->func.cxa.dso_handle = d;
+ return 0;
+}
diff --git a/stdlib/cxa_finalize.c b/stdlib/cxa_finalize.c
new file mode 100644
index 0000000000..da2d91512e
--- /dev/null
+++ b/stdlib/cxa_finalize.c
@@ -0,0 +1,44 @@
+/* Copyright (C) 1999 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public License as
+ published by the Free Software Foundation; either version 2 of the
+ License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+#include <assert.h>
+#include <stdlib.h>
+#include <atomicity.h>
+#include "exit.h"
+
+/* If D is non-NULL, call all functions registered with `__cxa_atexit'
+ with the same dso handle. Otherwise, if D is NULL, do nothing. */
+void
+__cxa_finalize (void *d)
+{
+ struct exit_function_list *funcs;
+
+ if (!d)
+ return;
+
+ for (funcs = __exit_funcs; funcs; funcs = funcs->next)
+ {
+ struct exit_function *f;
+
+ for (f = &funcs->fns[funcs->idx - 1]; f >= &funcs->fns[0]; --f)
+ if (d == f->func.cxa.dso_handle
+ /* We don't want to run this cleanup more than once. */
+ && compare_and_swap (&f->flavor, ef_cxa, ef_free))
+ (*f->func.cxa.fn) (f->func.cxa.arg);
+ }
+}
diff --git a/stdlib/exit.c b/stdlib/exit.c
index f63dc1fdec..904c225336 100644
--- a/stdlib/exit.c
+++ b/stdlib/exit.c
@@ -56,6 +56,9 @@ exit (int status)
case ef_at:
(*f->func.at) ();
break;
+ case ef_cxa:
+ (*f->func.cxa.fn) (f->func.cxa.arg);
+ break;
}
}
diff --git a/stdlib/exit.h b/stdlib/exit.h
index dcaa85a442..9b6c1c3d4e 100644
--- a/stdlib/exit.h
+++ b/stdlib/exit.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 1991, 1996, 1997 Free Software Foundation, Inc.
+/* Copyright (C) 1991, 1996, 1997, 1999 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@@ -19,9 +19,21 @@
#ifndef _EXIT_H
#define _EXIT_H 1
+
+enum
+{
+ ef_free, /* `ef_free' MUST be zero! */
+ ef_us,
+ ef_on,
+ ef_at,
+ ef_cxa
+};
+
struct exit_function
{
- enum { ef_free, ef_us, ef_on, ef_at } flavor; /* `ef_free' MUST be zero! */
+ /* `flavour' should be of type of the `enum' above but since we need
+ this element in an atomic operation we have to use `long int'. */
+ long int flavor;
union
{
void (*at) (void);
@@ -30,6 +42,12 @@ struct exit_function
void (*fn) (int status, void *arg);
void *arg;
} on;
+ struct
+ {
+ void (*fn) (void *arg);
+ void *arg;
+ void *dso_handle;
+ } cxa;
} func;
};
struct exit_function_list