159 lines
3.6 KiB
C++
159 lines
3.6 KiB
C++
/* cygtls.cc
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This software is a copyrighted work licensed under the terms of the
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Cygwin license. Please consult the file "CYGWIN_LICENSE" for
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details. */
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#include "winsup.h"
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#define USE_SYS_TYPES_FD_SET
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#include "cygtls.h"
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#include <syslog.h>
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#include <stdlib.h>
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#include "path.h"
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#include "fhandler.h"
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#include "dtable.h"
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#include "create_posix_thread.h"
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#include "cygheap.h"
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#include "sigproc.h"
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#include "exception.h"
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/* Two calls to get the stack right... */
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void
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_cygtls::call (DWORD (*func) (void *, void *), void *arg)
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{
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char buf[__CYGTLS_PADSIZE__];
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/* Initialize this thread's ability to respond to things like
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SIGSEGV or SIGFPE. */
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exception protect;
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_my_tls.call2 (func, arg, buf);
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}
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void
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_cygtls::call2 (DWORD (*func) (void *, void *), void *arg, void *buf)
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{
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/* If func is pthread_wrapper, the final stack hasn't been set up yet.
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This only happens in pthread_wrapper itself. Thus it doesn't make
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sense to call init_thread or perform BLODA detection. pthread_wrapper
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eventually calls init_thread by itself. */
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if ((void *) func != (void *) pthread_wrapper)
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init_thread (buf, func);
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DWORD res = func (arg, buf);
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remove (INFINITE);
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/* Don't call ExitThread on the main thread since we may have been
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dynamically loaded. */
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if ((void *) func != (void *) dll_crt0_1
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&& (void *) func != (void *) dll_dllcrt0_1)
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ExitThread (res);
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}
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void
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_cygtls::init_thread (void *x, DWORD (*func) (void *, void *))
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{
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if (x)
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{
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memset (this, 0, sizeof (*this));
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_REENT_INIT_PTR (&local_clib);
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stackptr = stack;
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altstack.ss_flags = SS_DISABLE;
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if (_REENT_CLEANUP(_GLOBAL_REENT))
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local_clib.__cleanup = _cygtls::cleanup_early;
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}
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thread_id = GetCurrentThreadId ();
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initialized = CYGTLS_INITIALIZED;
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errno_addr = &(local_clib._errno);
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locals.cw_timer = NULL;
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locals.pathbufs.clear ();
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if ((void *) func == (void *) cygthread::stub
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|| (void *) func == (void *) cygthread::simplestub)
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return;
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cygheap->add_tls (this);
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}
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void
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_cygtls::fixup_after_fork ()
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{
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if (sig)
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{
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pop ();
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sig = 0;
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}
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stacklock = spinning = 0;
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signal_arrived = NULL;
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locals.select.sockevt = NULL;
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locals.cw_timer = NULL;
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locals.pathbufs.clear ();
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wq.thread_ev = NULL;
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}
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#define free_local(x) \
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if (locals.x) \
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{ \
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free (locals.x); \
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locals.x = NULL; \
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}
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void
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_cygtls::remove (DWORD wait)
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{
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initialized = 0;
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if (exit_state >= ES_FINAL)
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return;
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debug_printf ("wait %u", wait);
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HANDLE mutex = cygheap->remove_tls (this);
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remove_wq (wait);
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/* FIXME: Need some sort of atthreadexit function to allow things like
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select to control this themselves. */
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remove_pending_sigs ();
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if (signal_arrived)
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{
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HANDLE h = signal_arrived;
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signal_arrived = NULL;
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CloseHandle (h);
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}
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/* Close handle and free memory used by select. */
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if (locals.select.sockevt)
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{
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CloseHandle (locals.select.sockevt);
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locals.select.sockevt = NULL;
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free_local (select.ser_num);
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free_local (select.w4);
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}
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/* Free memory used by network functions. */
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free_local (ntoa_buf);
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free_local (protoent_buf);
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free_local (servent_buf);
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free_local (hostent_buf);
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/* Free temporary TLS path buffers. */
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locals.pathbufs.destroy ();
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/* Close timer handle. */
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if (locals.cw_timer)
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NtClose (locals.cw_timer);
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if (mutex)
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{
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ReleaseMutex (mutex);
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CloseHandle (mutex);
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}
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}
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void
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_cygtls::cleanup_early (struct _reent *)
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{
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/* Do nothing */
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}
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void san::leave ()
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{
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/* Restore tls_pathbuf counters in case of error. */
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_my_tls.locals.pathbufs._counters = _cnt;
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_my_tls.andreas = _clemente;
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}
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