diff options
Diffstat (limited to 'sysdeps/i386/backtrace.c')
| -rw-r--r-- | sysdeps/i386/backtrace.c | 35 |
1 files changed, 27 insertions, 8 deletions
diff --git a/sysdeps/i386/backtrace.c b/sysdeps/i386/backtrace.c index 8b61913dde..cf3b2719b9 100644 --- a/sysdeps/i386/backtrace.c +++ b/sysdeps/i386/backtrace.c @@ -1,5 +1,5 @@ /* Return backtrace of current program state. - Copyright (C) 1998, 2000, 2003, 2004, 2005 Free Software Foundation, Inc. + Copyright (C) 1998, 2000, 2003-2005, 2007 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998. @@ -36,21 +36,26 @@ static _Unwind_Reason_Code (*unwind_backtrace) (_Unwind_Trace_Fn, void *); static _Unwind_Ptr (*unwind_getip) (struct _Unwind_Context *); static _Unwind_Ptr (*unwind_getcfa) (struct _Unwind_Context *); static _Unwind_Ptr (*unwind_getgr) (struct _Unwind_Context *, int); +static void *libgcc_handle; static void init (void) { - void *handle = __libc_dlopen ("libgcc_s.so.1"); + libgcc_handle = __libc_dlopen ("libgcc_s.so.1"); - if (handle == NULL) + if (libgcc_handle == NULL) return; - unwind_backtrace = __libc_dlsym (handle, "_Unwind_Backtrace"); - unwind_getip = __libc_dlsym (handle, "_Unwind_GetIP"); - unwind_getcfa = __libc_dlsym (handle, "_Unwind_GetCFA"); - unwind_getgr = __libc_dlsym (handle, "_Unwind_GetGR"); + unwind_backtrace = __libc_dlsym (libgcc_handle, "_Unwind_Backtrace"); + unwind_getip = __libc_dlsym (libgcc_handle, "_Unwind_GetIP"); + unwind_getcfa = __libc_dlsym (libgcc_handle, "_Unwind_GetCFA"); + unwind_getgr = __libc_dlsym (libgcc_handle, "_Unwind_GetGR"); if (unwind_getip == NULL || unwind_getgr == NULL || unwind_getcfa == NULL) - unwind_backtrace = NULL; + { + unwind_backtrace = NULL; + __libc_dlclose (libgcc_handle); + libgcc_handle = NULL; + } } #else # define unwind_backtrace _Unwind_Backtrace @@ -142,3 +147,17 @@ __backtrace (array, size) } weak_alias (__backtrace, backtrace) libc_hidden_def (__backtrace) + + +#ifdef SHARED +/* Free all resources if necessary. */ +libc_freeres_fn (free_mem) +{ + unwind_backtrace = NULL; + if (libgcc_handle != NULL) + { + __libc_dlclose (libgcc_handle); + libgcc_handle = NULL; + } +} +#endif |