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Diffstat (limited to 'nptl/sysdeps/pthread/unwind-forcedunwind.c')
-rw-r--r--nptl/sysdeps/pthread/unwind-forcedunwind.c61
1 files changed, 47 insertions, 14 deletions
diff --git a/nptl/sysdeps/pthread/unwind-forcedunwind.c b/nptl/sysdeps/pthread/unwind-forcedunwind.c
index 6792d719d3..402591f6e4 100644
--- a/nptl/sysdeps/pthread/unwind-forcedunwind.c
+++ b/nptl/sysdeps/pthread/unwind-forcedunwind.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 2003, 2005, 2006 Free Software Foundation, Inc.
+/* Copyright (C) 2003, 2005, 2006, 2009 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Jakub Jelinek <jakub@redhat.com>.
@@ -21,7 +21,9 @@
#include <stdio.h>
#include <unwind.h>
#include <pthreadP.h>
+#include <sysdep.h>
+static void *libgcc_s_handle;
static void (*libgcc_s_resume) (struct _Unwind_Exception *exc);
static _Unwind_Reason_Code (*libgcc_s_personality)
(int, _Unwind_Action, _Unwind_Exception_Class, struct _Unwind_Exception *,
@@ -34,10 +36,13 @@ void
__attribute_noinline__
pthread_cancel_init (void)
{
- void *resume, *personality, *forcedunwind, *getcfa;
+ void *resume;
+ void *personality;
+ void *forcedunwind;
+ void *getcfa;
void *handle;
- if (__builtin_expect (libgcc_s_getcfa != NULL, 1))
+ if (__builtin_expect (libgcc_s_handle != NULL, 1))
{
/* Force gcc to reload all values. */
asm volatile ("" ::: "memory");
@@ -58,23 +63,42 @@ pthread_cancel_init (void)
)
__libc_fatal ("libgcc_s.so.1 must be installed for pthread_cancel to work\n");
+ PTR_MANGLE (resume);
libgcc_s_resume = resume;
+ PTR_MANGLE (personality);
libgcc_s_personality = personality;
+ PTR_MANGLE (forcedunwind);
libgcc_s_forcedunwind = forcedunwind;
- /* Make sure libgcc_s_getcfa is written last. Otherwise,
+ PTR_MANGLE (getcfa);
+ libgcc_s_getcfa = getcfa;
+ /* Make sure libgcc_s_handle is written last. Otherwise,
pthread_cancel_init might return early even when the pointer the
caller is interested in is not initialized yet. */
atomic_write_barrier ();
- libgcc_s_getcfa = getcfa;
+ libgcc_s_handle = handle;
+}
+
+void
+__libc_freeres_fn_section
+__unwind_freeres (void)
+{
+ void *handle = libgcc_s_handle;
+ if (handle != NULL)
+ {
+ libgcc_s_handle = NULL;
+ __libc_dlclose (handle);
+ }
}
void
_Unwind_Resume (struct _Unwind_Exception *exc)
{
- if (__builtin_expect (libgcc_s_resume == NULL, 0))
+ if (__builtin_expect (libgcc_s_handle == NULL, 0))
pthread_cancel_init ();
- libgcc_s_resume (exc);
+ void (*resume) (struct _Unwind_Exception *exc) = libgcc_s_resume;
+ PTR_DEMANGLE (resume);
+ resume (exc);
}
_Unwind_Reason_Code
@@ -83,28 +107,37 @@ __gcc_personality_v0 (int version, _Unwind_Action actions,
struct _Unwind_Exception *ue_header,
struct _Unwind_Context *context)
{
- if (__builtin_expect (libgcc_s_personality == NULL, 0))
+ if (__builtin_expect (libgcc_s_handle == NULL, 0))
pthread_cancel_init ();
- return libgcc_s_personality (version, actions, exception_class,
- ue_header, context);
+ _Unwind_Reason_Code (*personality)
+ (int, _Unwind_Action, _Unwind_Exception_Class, struct _Unwind_Exception *,
+ struct _Unwind_Context *) = libgcc_s_personality;
+ PTR_DEMANGLE (personality);
+ return personality (version, actions, exception_class, ue_header, context);
}
_Unwind_Reason_Code
_Unwind_ForcedUnwind (struct _Unwind_Exception *exc, _Unwind_Stop_Fn stop,
void *stop_argument)
{
- if (__builtin_expect (libgcc_s_forcedunwind == NULL, 0))
+ if (__builtin_expect (libgcc_s_handle == NULL, 0))
pthread_cancel_init ();
- return libgcc_s_forcedunwind (exc, stop, stop_argument);
+ _Unwind_Reason_Code (*forcedunwind)
+ (struct _Unwind_Exception *, _Unwind_Stop_Fn, void *)
+ = libgcc_s_forcedunwind;
+ PTR_DEMANGLE (forcedunwind);
+ return forcedunwind (exc, stop, stop_argument);
}
_Unwind_Word
_Unwind_GetCFA (struct _Unwind_Context *context)
{
- if (__builtin_expect (libgcc_s_getcfa == NULL, 0))
+ if (__builtin_expect (libgcc_s_handle == NULL, 0))
pthread_cancel_init ();
- return libgcc_s_getcfa (context);
+ _Unwind_Word (*getcfa) (struct _Unwind_Context *) = libgcc_s_getcfa;
+ PTR_DEMANGLE (getcfa);
+ return getcfa (context);
}