diff options
author | Christopher Faylor <me@cgf.cx> | 2003-11-28 23:55:59 +0300 |
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committer | Christopher Faylor <me@cgf.cx> | 2003-11-28 23:55:59 +0300 |
commit | 9a4d574b8d4550f53036dced342022b64e508abf (patch) | |
tree | 79d7ab65654ff5cb2fd2c0c035ac2b98deb1fcc2 /winsup/cygwin/fork.cc | |
parent | ffe006384344b5d2a86e6bedad96725391cfe88e (diff) |
Eliminate use of sigframe and sigthread throughout.
* Makefile.in (DLL_OFILES): Add sigfe.o. Remove reliance on cygwin.def from
cygwin0.dll dependency since dependence on sigfe.o implies that. Generate def
file on the fly using 'gendef'.
* configure.in: Don't auto-generate cygwin.def.
* configure: Regenerate.
* cygwin.din: Add SIGFE stuff where appropriate.
* dcrt0.cc (dll_crt0_1): Initialize cygwin tls early in process startup. Set
_main_tls to address of the main thread's cygwin tls.
* debug.h: Remove now unneeded WFSO and WFMO declarations.
* exceptions.cc (_last_thread): Define.
(set_thread_state_for_signals): New function.
(reset_thread_exception_for_signals): Ditto.
(init_thread_for_signals): Ditto.
(delete_thread_for_signals): Ditto.
(capture_thread_for_signals): Ditto.
(handle_exceptions): Set return address explicitly for exceptions prior to
calling sig_send.
(interrupt_on_return): Eliminate.
(setup_handler): Add preliminary implementation for dealing with
thread-specific signals by querying _main_tls.
(signal_exit): Use cygthread::main_thread_id instead of mainthread.id.
(call_signal_handler_now): For now, just handle the main thread.
* fork.cc (vfork): Save and restore main _my_tls.
* gendef: New file. Generates def file and sigfe.s file.
* gentls_offsets: New file. Generates offsets for perl to use in sigfe.s.
* how-signals-work.txt: Mention that info is obsolete.
* init.cc (dll_entry): Initialize cygwin tls storage here.
* miscfuncs.cc (low_priority_sleep): Make a C function for easier calling from
asm.
* perthread.h (vfork_save::tls): New element.
* signal.cc (nanosleep): Replace previous use of
sigframe.call_signal_handler_now with straight call to call_signal_handler_now.
(abort): Ditto.
* syscalls.cc (readv): Ditto.
* termios.cc (tcsetattr): Ditto.
* wait.cc (wait4): Ditto.
* sigproc.cc (sig_dispatch_pending): Ditto.
(sig_send): Ditto.
* sigproc.h: Declare call_signal_handler_now.
* thread.cc (pthread::thread_init_wrapper): Initialize cygwin tls. Remove
obsolete and unworking signal stuff.
* thread.h (verifyable_object::sigs): Eliminate.
(verifyable_object::sigmask): Eliminate.
(verifyable_object::sigtodo): Eliminate.
(verifyable_object::exit): Make attribute noreturn.
(verifyable_object::thread_init_wrapper): Ditto.
(pthread_null::exit): Ditto.
* winbase.h (__stackbase): Always define.
* winsup.h (low_priority_sleep): Declare as a "C" function.
* include/cygwin/version.h: Bump API version to reflect sigwait export.
* include/sys/queue.h: Protect SLIST_ENTRY from previous declaration.
* signal.cc (sigwait): Implement.
* select.cc (fhandler_base::ready_for_read): Add debugging output.
* devices.h: Define more device pointers via their storage.
* devices.in: Don't parse things like /dev/inet/tcp, as they really have no
meaning.
* devices.cc: Regenerate.
* gendevices: Set proper protection for output file.
* cygtls.h: New file.
* gendef: New file.
* gentls_offsets: New file.
* tlsoffsets.h: New file. Autogenerated.
* config/i386/longjmp.c: Remove. File subsumed by gendef output.
* config/i386/makefrag: Remove obsolete file.
* fhandler.cc: Remove spurious access_worker declaration.
* spawn.cc (spawnve): Make debugging output more accurate.
* cygwin-gperf: Remove.
* devices.cc: Remove.
Diffstat (limited to 'winsup/cygwin/fork.cc')
-rw-r--r-- | winsup/cygwin/fork.cc | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/winsup/cygwin/fork.cc b/winsup/cygwin/fork.cc index 00f296bae..309f3df47 100644 --- a/winsup/cygwin/fork.cc +++ b/winsup/cygwin/fork.cc @@ -634,7 +634,6 @@ fork () } grouped; MALLOC_CHECK; - sigframe thisframe (mainthread); debug_printf ("entering"); grouped.hParent = grouped.first_dll = NULL; @@ -688,7 +687,6 @@ vfork () #ifndef NEWVFORK return fork (); #else - sigframe thisframe; vfork_save *vf = get_vfork_val (); char **esp, **pp; @@ -697,12 +695,14 @@ vfork () else if (vf->pid) return fork (); + // FIXME the tls stuff could introduce a signal race if a child process + // exits quickly. if (!setjmp (vf->j)) { vf->pid = -1; __asm__ volatile ("movl %%esp,%0": "=r" (vf->vfork_esp):); __asm__ volatile ("movl %%ebp,%0": "=r" (vf->vfork_ebp):); - for (pp = (char **)vf->frame, esp = vf->vfork_esp; + for (pp = (char **) vf->frame, esp = vf->vfork_esp; esp <= vf->vfork_ebp + 2; pp++, esp++) *pp = *esp; vf->ctty = myself->ctty; @@ -710,16 +710,17 @@ vfork () vf->pgid = myself->pgid; int res = cygheap->fdtab.vfork_child_dup () ? 0 : -1; debug_printf ("%d = vfork()", res); + call_signal_handler_now (); // FIXME: racy + vf->tls = _my_tls; return res; } vf = get_vfork_val (); - for (pp = (char **)vf->frame, esp = vf->vfork_esp; + for (pp = (char **) vf->frame, esp = vf->vfork_esp; esp <= vf->vfork_ebp + 2; pp++, esp++) *esp = *pp; - thisframe.init (mainthread); cygheap->fdtab.vfork_parent_restore (); myself->ctty = vf->ctty; @@ -738,6 +739,9 @@ vfork () vf->pid = 0; debug_printf ("exiting vfork, pid %d", pid); sig_dispatch_pending (); + + call_signal_handler_now (); // FIXME: racy + _my_tls = vf->tls; return pid; #endif } |