diff options
Diffstat (limited to 'nptl/sysdeps/pthread/unwind-forcedunwind.c')
-rw-r--r-- | nptl/sysdeps/pthread/unwind-forcedunwind.c | 61 |
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); } |