diff options
Diffstat (limited to 'winsup/cygwin/cygtls.cc')
| -rw-r--r-- | winsup/cygwin/cygtls.cc | 251 |
1 files changed, 0 insertions, 251 deletions
diff --git a/winsup/cygwin/cygtls.cc b/winsup/cygwin/cygtls.cc deleted file mode 100644 index 4dcd5df8f..000000000 --- a/winsup/cygwin/cygtls.cc +++ /dev/null @@ -1,251 +0,0 @@ -/* cygtls.cc - - Copyright 2003, 2004 Red Hat, Inc. - -This software is a copyrighted work licensed under the terms of the -Cygwin license. Please consult the file "CYGWIN_LICENSE" for -details. */ - -#include "winsup.h" -#include "thread.h" -#include "cygtls.h" -#include "assert.h" -#include <syslog.h> -#include <signal.h> -#include "exceptions.h" -#include "sync.h" -#include "cygerrno.h" -#include "path.h" -#include "fhandler.h" -#include "dtable.h" -#include "cygheap.h" -#include "cygthread.h" -#include "pinfo.h" -#include "sigproc.h" - -class sentry -{ - static muto *lock; - int destroy; -public: - void init (); - bool acquired () {return lock->acquired ();} - sentry () {destroy = 0;} - sentry (DWORD wait) {destroy = lock->acquire (wait);} - ~sentry () {if (destroy) lock->release ();} - friend void _cygtls::init (); -}; - -muto NO_COPY *sentry::lock; - -static size_t NO_COPY nthreads; - -#define THREADLIST_CHUNK 256 - -void -_cygtls::init () -{ - if (cygheap->threadlist) - memset (cygheap->threadlist, 0, cygheap->sthreads * sizeof (cygheap->threadlist[0])); - else - { - cygheap->sthreads = THREADLIST_CHUNK; - cygheap->threadlist = (_cygtls **) ccalloc (HEAP_TLS, cygheap->sthreads, - sizeof (cygheap->threadlist[0])); - } - new_muto1 (sentry::lock, sentry_lock); -} - -void -_cygtls::set_state (bool is_exception) -{ - initialized = CYGTLS_INITIALIZED + is_exception; -} - -void -_cygtls::reset_exception () -{ - if (initialized == CYGTLS_EXCEPTION) - { -#ifdef DEBUGGING - debug_printf ("resetting stack after an exception stack %p, stackptr %p", stack, stackptr); -#endif - set_state (false); - } -} - -/* Two calls to get the stack right... */ -void -_cygtls::call (DWORD (*func) (void *, void *), void *arg) -{ - char buf[CYGTLS_PADSIZE]; - call2 (func, arg, buf); -} - -void -_cygtls::call2 (DWORD (*func) (void *, void *), void *arg, void *buf) -{ - exception_list except_entry; - /* Initialize this thread's ability to respond to things like - SIGSEGV or SIGFPE. */ - init_exceptions (&except_entry); - _my_tls.init_thread (buf, func); - DWORD res = func (arg, buf); - _my_tls.remove (INFINITE); - // FIXME: Need some sort of atthreadexit function to allow things like - // select to control this themselves - if (_my_tls.locals.exitsock != INVALID_SOCKET) - closesocket (_my_tls.locals.exitsock); - ExitThread (res); -} - -void -_cygtls::init_thread (void *x, DWORD (*func) (void *, void *)) -{ - if (x) - { - memset (this, 0, CYGTLS_PADSIZE); - stackptr = stack; - if (_GLOBAL_REENT) - { - local_clib._stdin = _GLOBAL_REENT->_stdin; - local_clib._stdout = _GLOBAL_REENT->_stdout; - local_clib._stderr = _GLOBAL_REENT->_stderr; - local_clib.__sdidinit = _GLOBAL_REENT->__sdidinit ? -1 : 0; - local_clib.__cleanup = _GLOBAL_REENT->__cleanup; - local_clib.__sglue._niobs = 3; - local_clib.__sglue._iobs = &_GLOBAL_REENT->__sf[0]; - } - local_clib._current_locale = "C"; - locals.process_logmask = LOG_UPTO (LOG_DEBUG); - locals.exitsock = INVALID_SOCKET; - } - - set_state (false); - errno_addr = &(local_clib._errno); - - if ((void *) func == (void *) cygthread::stub - || (void *) func == (void *) cygthread::simplestub) - return; - - sentry here (INFINITE); - if (nthreads >= cygheap->sthreads) - { - cygheap->threadlist = (_cygtls **) - crealloc (cygheap->threadlist, (cygheap->sthreads += THREADLIST_CHUNK) - * sizeof (cygheap->threadlist[0])); - memset (cygheap->threadlist + nthreads, 0, THREADLIST_CHUNK * sizeof (cygheap->threadlist[0])); - } - - cygheap->threadlist[nthreads++] = this; -} - -void -_cygtls::fixup_after_fork () -{ - if (sig) - { - pop (); - sig = 0; - } - stacklock = 0; - wq.thread_ev = NULL; -} - -void -_cygtls::remove (DWORD wait) -{ - debug_printf ("wait %p\n", wait); - do - { - sentry here (wait); - if (here.acquired ()) - { - for (size_t i = 0; i < nthreads; i++) - if (this == cygheap->threadlist[i]) - { - if (i < --nthreads) - cygheap->threadlist[i] = cygheap->threadlist[nthreads]; - debug_printf ("removed %p element %d", this, i); - break; - } - } - } while (0); - remove_wq (wait); -} - -void -_cygtls::push (__stack_t addr, bool exception) -{ - if (exception) - lock (); - *stackptr++ = (__stack_t) addr; - if (exception) - unlock (); - set_state (exception); -} - -#define BAD_IX ((size_t) -1) -static size_t NO_COPY threadlist_ix = BAD_IX; - -_cygtls * -_cygtls::find_tls (int sig) -{ - debug_printf ("sig %d\n", sig); - sentry here (INFINITE); - __asm__ volatile (".equ _threadlist_exception_return,."); - _cygtls *res = NULL; - for (threadlist_ix = 0; threadlist_ix < nthreads; threadlist_ix++) - if (sigismember (&(cygheap->threadlist[threadlist_ix]->sigwait_mask), sig)) - { - res = cygheap->threadlist[threadlist_ix]; - break; - } - threadlist_ix = BAD_IX; - return res; -} - -void -_cygtls::set_siginfo (sigpacket *pack) -{ - infodata = pack->si; -} - -extern "C" DWORD __stdcall RtlUnwind (void *, void *, void *, DWORD); -static int -handle_threadlist_exception (EXCEPTION_RECORD *e, void *frame, CONTEXT *, void *) -{ - if (e->ExceptionCode != STATUS_ACCESS_VIOLATION) - { - system_printf ("handle_threadlist_exception called with exception code %d\n", - e->ExceptionCode); - return 1; - } - - sentry here; - if (threadlist_ix == BAD_IX) - { - system_printf ("handle_threadlist_exception called with threadlist_ix %d\n", - BAD_IX); - return 1; - } - - if (!here.acquired ()) - { - system_printf ("handle_threadlist_exception couldn't aquire muto\n"); - return 1; - } - - extern void *threadlist_exception_return; - cygheap->threadlist[threadlist_ix]->remove (INFINITE); - threadlist_ix = 0; - RtlUnwind (frame, threadlist_exception_return, e, 0); - return 0; -} - -void -_cygtls::init_threadlist_exceptions (exception_list *el) -{ - extern void init_exception_handler (exception_list *, exception_handler *); - init_exception_handler (el, handle_threadlist_exception); -} |