diff options
Diffstat (limited to 'REORG.TODO/nptl/pt-cleanup.c')
| -rw-r--r-- | REORG.TODO/nptl/pt-cleanup.c | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/REORG.TODO/nptl/pt-cleanup.c b/REORG.TODO/nptl/pt-cleanup.c new file mode 100644 index 0000000000..ce2889df0a --- /dev/null +++ b/REORG.TODO/nptl/pt-cleanup.c @@ -0,0 +1,62 @@ +/* Copyright (C) 2002-2017 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper <drepper@redhat.com>, 2002. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 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 + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#include <setjmp.h> +#include <stdlib.h> +#include "pthreadP.h" +#include <jmpbuf-unwind.h> + +void +__pthread_cleanup_upto (__jmp_buf target, char *targetframe) +{ + struct pthread *self = THREAD_SELF; + struct _pthread_cleanup_buffer *cbuf; + + /* Adjust all pointers used in comparisons, so that top of thread's + stack is at the top of address space. Without that, things break + if stack is allocated above the main stack. */ + uintptr_t adj = (uintptr_t) self->stackblock + self->stackblock_size; + uintptr_t targetframe_adj = (uintptr_t) targetframe - adj; + + for (cbuf = THREAD_GETMEM (self, cleanup); + cbuf != NULL && _JMPBUF_UNWINDS_ADJ (target, cbuf, adj); + cbuf = cbuf->__prev) + { +#if _STACK_GROWS_DOWN + if ((uintptr_t) cbuf - adj <= targetframe_adj) + { + cbuf = NULL; + break; + } +#elif _STACK_GROWS_UP + if ((uintptr_t) cbuf - adj >= targetframe_adj) + { + cbuf = NULL; + break; + } +#else +# error "Define either _STACK_GROWS_DOWN or _STACK_GROWS_UP" +#endif + + /* Call the cleanup code. */ + cbuf->__routine (cbuf->__arg); + } + + THREAD_SETMEM (self, cleanup, cbuf); +} +hidden_def (__pthread_cleanup_upto) |