void __pthread_perform_cleanup(char *currentframe)
{
pthread_descr self = thread_self();
struct _pthread_cleanup_buffer *c = THREAD_GETMEM(self, p_cleanup);
struct _pthread_cleanup_buffer *last;
if (c != NULL)
while (FRAME_LEFT (currentframe, c))
{
last = c;
c = c->__prev;
if (c == NULL || FRAME_LEFT (last, c))
{
c = NULL;
break;
}
}
while (c != NULL)
{
c->__routine(c->__arg);
last = c;
c = c->__prev;
if (FRAME_LEFT (last, c))
break;
}
/* And the TSD which needs special help. */
if (THREAD_GETMEM(self, p_libc_specific[_LIBC_TSD_KEY_RPC_VARS]) != NULL)
__rpc_thread_destroy ();
}
static _Unwind_Reason_Code
unwind_stop (int version, _Unwind_Action actions,
_Unwind_Exception_Class exc_class,
struct _Unwind_Exception *exc_obj,
struct _Unwind_Context *context, void *stop_parameter)
{
struct pthread_unwind_buf *buf = stop_parameter;
struct pthread *self = THREAD_SELF;
struct _pthread_cleanup_buffer *curp = THREAD_GETMEM (self, cleanup);
int do_longjump = 0;
/* 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;
/* Do longjmp if we're at "end of stack", aka "end of unwind data".
We assume there are only C frame without unwind data in between
here and the jmp_buf target. Otherwise simply note that the CFA
of a function is NOT within it's stack frame; it's the SP of the
previous frame. */
if ((actions & _UA_END_OF_STACK)
|| ! _JMPBUF_CFA_UNWINDS_ADJ (buf->cancel_jmp_buf[0].jmp_buf, context,
adj))
do_longjump = 1;
if (__builtin_expect (curp != NULL, 0))
{
/* Handle the compatibility stuff. Execute all handlers
registered with the old method which would be unwound by this
step. */
struct _pthread_cleanup_buffer *oldp = buf->priv.data.cleanup;
void *cfa = (void *) (_Unwind_Ptr) _Unwind_GetCFA (context);
if (curp != oldp && (do_longjump || FRAME_LEFT (cfa, curp, adj)))
{
do
{
/* Pointer to the next element. */
struct _pthread_cleanup_buffer *nextp = curp->__prev;
/* Call the handler. */
curp->__routine (curp->__arg);
/* To the next. */
curp = nextp;
}
while (curp != oldp
&& (do_longjump || FRAME_LEFT (cfa, curp, adj)));
/* Mark the current element as handled. */
THREAD_SETMEM (self, cleanup, curp);
}
}
if (do_longjump)
__libc_unwind_longjmp ((struct __jmp_buf_tag *) buf->cancel_jmp_buf, 1);
return _URC_NO_REASON;
}
void _pthread_cleanup_push(struct _pthread_cleanup_buffer * buffer,
void (*routine)(void *), void * arg)
{
pthread_descr self = thread_self();
buffer->__routine = routine;
buffer->__arg = arg;
buffer->__prev = THREAD_GETMEM(self, p_cleanup);
if (buffer->__prev != NULL && FRAME_LEFT (buffer, buffer->__prev))
buffer->__prev = NULL;
THREAD_SETMEM(self, p_cleanup, buffer);
}
void _pthread_cleanup_push_defer(struct _pthread_cleanup_buffer * buffer,
void (*routine)(void *), void * arg)
{
pthread_descr self = thread_self();
buffer->__routine = routine;
buffer->__arg = arg;
buffer->__canceltype = THREAD_GETMEM(self, p_canceltype);
buffer->__prev = THREAD_GETMEM(self, p_cleanup);
if (buffer->__prev != NULL && FRAME_LEFT (buffer, buffer->__prev))
buffer->__prev = NULL;
THREAD_SETMEM(self, p_canceltype, PTHREAD_CANCEL_DEFERRED);
THREAD_SETMEM(self, p_cleanup, buffer);
}
