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Always zero all elements of siginfo_t throughout. 

* cygtls.h (_cygtls::thread_context): Declare new field.
(_cygtls::thread_id): Ditto.
(_cygtls::signal_exit): Move into this class.
(_cygtls::copy_context): Declare new function.
(_cygtls::signal_debugger): Ditto.
* cygtls.cc (_cygtls::init_thread): Fill out thread id field.
* exceptions.cc (exception): Change message when exception info is unknown.
Copy context to thread local storage.
(_cygtls::handle_exceptions): Avoid double test for fault_guarded.  Reflect
move of signal_exit to _cygtls class.
(sigpacket::process): Copy context to thread local storage.
(_cygtls::signal_exit): Move to _cygtls class.  Call signal_debugger to notify
debugger of exiting signal (WIP).  Call stackdump here (WIP).
(_cygtls::copy_context): Define new function.
(_cygtls::signal_debugger): Ditto.
* tlsoffsets.h: Regenerate.
* include/cygwin.h (_fpstate): New internal structure.
(ucontext): Declare new structure (WIP).
(__COPY_CONTEXT_SIZE): New define.
* exceptions.cc (_cygtls::interrupt_setup): Clear "threadkill" field when there
is no sigwaiting thread.
(setup_handler): Move event handling into interrupt_setup.
This commit is contained in:
Christopher Faylor 2006-02-06 18:24:11 +00:00
parent 125ff9be63
commit 985d0e68c5
13 changed files with 201 additions and 118 deletions
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27
winsup/cygwin/ChangeLog
View File

@ -1,3 +1,30 @@
2006-02-06 Christopher Faylor <cgf@timesys.com>
Always zero all elements of siginfo_t throughout.
* cygtls.h (_cygtls::thread_context): Declare new field.
(_cygtls::thread_id): Ditto.
(_cygtls::signal_exit): Move into this class.
(_cygtls::copy_context): Declare new function.
(_cygtls::signal_debugger): Ditto.
* cygtls.cc (_cygtls::init_thread): Fill out thread id field.
* exceptions.cc (exception): Change message when exception info is
unknown. Copy context to thread local storage.
(_cygtls::handle_exceptions): Avoid double test for fault_guarded.
Reflect move of signal_exit to _cygtls class.
(sigpacket::process): Copy context to thread local storage.
(_cygtls::signal_exit): Move to _cygtls class. Call signal_debugger to
notify debugger of exiting signal (WIP). Call stackdump here (WIP).
(_cygtls::copy_context): Define new function.
(_cygtls::signal_debugger): Ditto.
* tlsoffsets.h: Regenerate.
* include/cygwin.h (_fpstate): New internal structure.
(ucontext): Declare new structure (WIP).
(__COPY_CONTEXT_SIZE): New define.
* exceptions.cc (_cygtls::interrupt_setup): Clear "threadkill" field
when there is no sigwaiting thread.
(setup_handler): Move event handling into interrupt_setup.
2006-02-06 Corinna Vinschen <corinna@vinschen.de>
* fhandler_socket.cc (fhandler_socket::connect): Fix formatting.

1
winsup/cygwin/cygtls.cc
View File

@ -100,6 +100,7 @@ _cygtls::init_thread (void *x, DWORD (*func) (void *, void *))
init_exception_handler (handle_exceptions);
}
thread_id = GetCurrentThreadId ();
initialized = CYGTLS_INITIALIZED;
locals.exitsock = INVALID_SOCKET;
errno_addr = &(local_clib._errno);

5
winsup/cygwin/cygtls.h
View File

@ -149,6 +149,8 @@ struct _cygtls
sigset_t sigmask;
sigset_t sigwait_mask;
siginfo_t *sigwait_info;
struct ucontext thread_context;
DWORD thread_id;
unsigned threadkill;
siginfo_t infodata;
struct pthread *tid;
@ -193,6 +195,9 @@ struct _cygtls
static int handle_threadlist_exception (EXCEPTION_RECORD *e, exception_list *frame, CONTEXT *c, void *);
void init_exception_handler (int (*) (EXCEPTION_RECORD *, exception_list *, CONTEXT *, void*));
void init_threadlist_exceptions ();
void signal_exit (int) __attribute__ ((noreturn, regparm(2)));
void copy_context (CONTEXT *) __attribute__ ((regparm(2)));
void signal_debugger (int) __attribute__ ((regparm(2)));
#ifdef _THREAD_H
operator HANDLE () const {return tid->win32_obj_id;}

3
winsup/cygwin/dcrt0.cc
View File

@ -1075,10 +1075,9 @@ do_exit (int status)
/* Kill orphaned children on group leader exit */
if (myself->has_pgid_children && myself->pid == myself->pgid)
{
siginfo_t si;
siginfo_t si = {0};
si.si_signo = -SIGHUP;
si.si_code = SI_KERNEL;
si.si_pid = si.si_uid = si.si_errno = 0;
sigproc_printf ("%d == pgrp %d, send SIG{HUP,CONT} to stopped children",
myself->pid, myself->pgid);
kill_pgrp (myself->pgid, si);

72
winsup/cygwin/exceptions.cc
View File

@ -44,7 +44,6 @@ extern NO_COPY DWORD dwExeced;
int NO_COPY sigExeced;
static BOOL WINAPI ctrl_c_handler (DWORD);
static void signal_exit (int) __attribute__ ((noreturn));
char windows_system_directory[1024];
static size_t windows_system_directory_length;
@ -184,7 +183,7 @@ exception (EXCEPTION_RECORD *e, CONTEXT *in)
if (exception_name)
small_printf ("Exception: %s at eip=%08x\r\n", exception_name, in->Eip);
else
small_printf ("Exception %d at eip=%08x\r\n", e->ExceptionCode, in->Eip);
small_printf ("Signal %d at eip=%08x\r\n", e->ExceptionCode, in->Eip);
small_printf ("eax=%08x ebx=%08x ecx=%08x edx=%08x esi=%08x edi=%08x\r\n",
in->Eax, in->Ebx, in->Ecx, in->Edx, in->Esi, in->Edi);
small_printf ("ebp=%08x esp=%08x program=%s, pid %u, thread %s\r\n",
@ -454,7 +453,7 @@ _cygtls::handle_exceptions (EXCEPTION_RECORD *e, exception_list *frame, CONTEXT
if (exit_already || e->ExceptionFlags)
return 1;
siginfo_t si;
siginfo_t si = {0};
si.si_code = SI_KERNEL;
/* Coerce win32 value to posix value. */
switch (e->ExceptionCode)
@ -579,12 +578,15 @@ _cygtls::handle_exceptions (EXCEPTION_RECORD *e, exception_list *frame, CONTEXT
break;
}
if (!me.fault_guarded ()
&& (!cygwin_finished_initializing
|| &me == _sig_tls
|| (void *) global_sigs[si.si_signo].sa_handler == (void *) SIG_DFL
|| (void *) global_sigs[si.si_signo].sa_handler == (void *) SIG_IGN
|| (void *) global_sigs[si.si_signo].sa_handler == (void *) SIG_ERR))
if (me.fault_guarded ())
me.return_from_fault ();
me.copy_context (in);
if (!cygwin_finished_initializing
|| &me == _sig_tls
|| (void *) global_sigs[si.si_signo].sa_handler == (void *) SIG_DFL
|| (void *) global_sigs[si.si_signo].sa_handler == (void *) SIG_IGN
|| (void *) global_sigs[si.si_signo].sa_handler == (void *) SIG_ERR)
{
/* Print the exception to the console */
if (!myself->cygstarted)
@ -613,7 +615,7 @@ _cygtls::handle_exceptions (EXCEPTION_RECORD *e, exception_list *frame, CONTEXT
}
if (e->ExceptionCode == STATUS_ACCESS_VIOLATION)
{
{
int error_code = 0;
if (si.si_code == SEGV_ACCERR) /* Address present */
error_code |= 1;
@ -628,12 +630,9 @@ _cygtls::handle_exceptions (EXCEPTION_RECORD *e, exception_list *frame, CONTEXT
? 0 : 4) | (e->ExceptionInformation[0] << 1));
}
signal_exit (0x80 | si.si_signo); // Flag signal + core dump
me.signal_exit (0x80 | si.si_signo); // Flag signal + core dump
}
if (me.fault_guarded ())
me.return_from_fault ();
si.si_addr = (void *) in->Eip;
si.si_errno = si.si_pid = si.si_uid = 0;
me.incyg++;
@ -755,6 +754,15 @@ _cygtls::interrupt_setup (int sig, void *handler, struct sigaction& siga)
this->sig = sig; // Should always be last thing set to avoid a race
if (!event)
threadkill = false;
else
{
HANDLE h = event;
event = NULL;
SetEvent (h);
}
/* Clear any waiting threads prior to dispatching to handler function */
int res = SetEvent (signal_arrived); // For an EINTR case
proc_subproc (PROC_CLEARWAIT, 1);
@ -841,12 +849,6 @@ setup_handler (int sig, void *handler, struct sigaction& siga, _cygtls *tls)
}
out:
if (interrupted && tls->event)
{
HANDLE h = tls->event;
tls->event = NULL;
SetEvent (h);
}
sigproc_printf ("signal %d %sdelivered", sig, interrupted ? "" : "not ");
return interrupted;
}
@ -1209,19 +1211,18 @@ exit_sig:
CONTEXT c;
c.ContextFlags = CONTEXT_FULL;
GetThreadContext (hMainThread, &c);
if (!try_to_debug ())
stackdump (c.Ebp, 1, 1);
tls->copy_context (&c);
si.si_signo |= 0x80;
}
sigproc_printf ("signal %d, about to call do_exit", si.si_signo);
signal_exit (si.si_signo); /* never returns */
tls->signal_exit (si.si_signo); /* never returns */
}
/* Cover function to `do_exit' to handle exiting even in presence of more
exceptions. We used to call exit, but a SIGSEGV shouldn't cause atexit
routines to run. */
static void
signal_exit (int rc)
void
_cygtls::signal_exit (int rc)
{
if (hExeced)
{
@ -1229,6 +1230,10 @@ signal_exit (int rc)
TerminateProcess (hExeced, sigExeced = rc);
}
signal_debugger (rc & 0x7f);
if ((rc & 0x80) && !try_to_debug ())
stackdump (thread_context.ebp, 1, 1);
lock_process until_exit (true);
if (hExeced || exit_state)
myself.exit (rc);
@ -1331,3 +1336,20 @@ reset_signal_arrived ()
if (_my_tls.stackptr > _my_tls.stack)
debug_printf ("stackptr[-1] %p", _my_tls.stackptr[-1]);
}
void
_cygtls::copy_context (CONTEXT *c)
{
memcpy (&thread_context, c, (&thread_context._internal - (unsigned char *) &thread_context));
}
void
_cygtls::signal_debugger (int sig)
{
if (being_debugged ())
{
char sigmsg[2 * sizeof (_CYGWIN_SIGNAL_STRING " ffffffff ffffffff")];
__small_sprintf (sigmsg, _CYGWIN_SIGNAL_STRING " %d %p %p", sig, thread_id, &thread_context);
OutputDebugString (sigmsg);
}
}

6
winsup/cygwin/fhandler_termios.cc
View File

@ -110,10 +110,9 @@ tty_min::kill_pgrp (int sig)
{
int killself = 0;
winpids pids ((DWORD) PID_MAP_RW);
siginfo_t si;
siginfo_t si = {0};
si.si_signo = sig;
si.si_code = SI_KERNEL;
si.si_pid = si.si_uid = si.si_errno = 0;
for (unsigned i = 0; i < pids.npids; i++)
{
_pinfo *p = pids[i];
@ -172,10 +171,9 @@ fhandler_termios::bg_check (int sig)
by another signal. */
if (WaitForSingleObject (signal_arrived, 0) != WAIT_OBJECT_0)
{
siginfo_t si;
siginfo_t si = {0};
si.si_signo = sig;
si.si_code = SI_KERNEL;
si.si_pid = si.si_uid = si.si_errno = 0;
kill_pgrp (myself->pgid, si);
}
return bg_signalled;

49
winsup/cygwin/include/cygwin/signal.h
View File

@ -1,6 +1,6 @@
/* signal.h
Copyright 2004, 2006 Red Hat, Inc.
Copyright 2004, 2005, 2006 Red Hat, Inc.
This file is part of Cygwin.
@ -14,17 +14,50 @@
#ifdef __cplusplus
extern "C" {
#endif
struct _fpstate
{
unsigned long cw;
unsigned long sw;
unsigned long tag;
unsigned long ipoff;
unsigned long cssel;
unsigned long dataoff;
unsigned long datasel;
unsigned char _st[80];
unsigned long nxst;
};
#if 0
struct ucontext
{
unsigned long uc_flags;
void *uc_link;
stack_t uc_stack;
struct sigcontext uc_mcontext;
sigset_t uc_sigmask;
unsigned long cr2;
unsigned long dr0;
unsigned long dr1;
unsigned long dr2;
unsigned long dr3;
unsigned long dr6;
unsigned long dr7;
struct _fpstate fpstate;
unsigned long gs;
unsigned long fs;
unsigned long es;
unsigned long ds;
unsigned long edi;
unsigned long esi;
unsigned long ebx;
unsigned long edx;
unsigned long ecx;
unsigned long eax;
unsigned long ebp;
unsigned long eip;
unsigned long cs;
unsigned long eflags;
unsigned long esp;
unsigned long ss;
unsigned char _internal;
unsigned long oldmask;
};
#endif
#define __COPY_CONTEXT_SIZE ((unsigned) &((struct ucontext *) 0)->_internal)
typedef union sigval
{

6
winsup/cygwin/pinfo.cc
View File

@ -836,17 +836,13 @@ proc_waiter (void *arg)
pinfo vchild = *(pinfo *) arg;
((pinfo *) arg)->waiter_ready = true;
siginfo_t si;
siginfo_t si = {0};
si.si_signo = SIGCHLD;
si.si_code = CLD_EXITED;
si.si_pid = vchild->pid;
si.si_errno = 0;
#if 0 // FIXME: This is tricky to get right
si.si_utime = pchildren[rc]->rusage_self.ru_utime;
si.si_stime = pchildren[rc].rusage_self.ru_stime;
#else
si.si_utime = 0;
si.si_stime = 0;
#endif
pid_t pid = vchild->pid;

12
winsup/cygwin/signal.cc
View File

@ -209,10 +209,9 @@ _pinfo::kill (siginfo_t& si)
}
else if (sendSIGCONT)
{
siginfo_t si2;
siginfo_t si2 = {0};
si2.si_signo = SIGCONT;
si2.si_code = SI_KERNEL;
si2.si_pid = si2.si_uid = si2.si_errno = 0;
sig_send (this, si2);
}
@ -251,20 +250,18 @@ kill0 (pid_t pid, siginfo_t& si)
int
killsys (pid_t pid, int sig)
{
siginfo_t si;
siginfo_t si = {0};
si.si_signo = sig;
si.si_code = SI_KERNEL;
si.si_pid = si.si_uid = si.si_errno = 0;
return kill0 (pid, si);
}
int
kill (pid_t pid, int sig)
{
siginfo_t si;
siginfo_t si = {0};
si.si_signo = sig;
si.si_code = SI_USER;
si.si_pid = si.si_uid = si.si_errno = 0;
return kill0 (pid, si);
}
@ -538,7 +535,7 @@ sigwaitinfo (const sigset_t *set, siginfo_t *info)
extern "C" int
sigqueue (pid_t pid, int sig, const union sigval value)
{
siginfo_t si;
siginfo_t si = {0};
pinfo dest (pid);
if (!dest)
{
@ -547,7 +544,6 @@ sigqueue (pid_t pid, int sig, const union sigval value)
}
si.si_signo = sig;
si.si_code = SI_QUEUE;
si.si_pid = si.si_uid = si.si_errno = 0;
si.si_value = value;
return sig_send (dest, si);
}

2
winsup/cygwin/sigproc.cc
View File

@ -514,7 +514,7 @@ sig_send (_pinfo *p, int sig)
{
if (sig == __SIGNOHOLD)
SetEvent (sigCONT);
siginfo_t si;
siginfo_t si = {0};
si.si_signo = sig;
si.si_code = SI_KERNEL;
si.si_pid = si.si_uid = si.si_errno = 0;

3
winsup/cygwin/thread.cc
View File

@ -2870,12 +2870,11 @@ pthread_kill (pthread_t thread, int sig)
if (!pthread::is_good_object (&thread))
return EINVAL;
siginfo_t si;
siginfo_t si = {0};
si.si_signo = sig;
si.si_code = SI_USER;
si.si_pid = myself->pid;
si.si_uid = myself->uid;
si.si_errno = 0;
thread->cygtls->set_threadkill ();
int rval = sig ? sig_send (NULL, si, thread->cygtls) : 0;

3
winsup/cygwin/timer.cc
View File

@ -164,8 +164,7 @@ timer_thread (VOID *x)
{
case SIGEV_SIGNAL:
{
siginfo_t si;
memset (&si, 0, sizeof (si));
siginfo_t si = {0};
si.si_signo = tt->evp.sigev_signo;
si.si_sigval.sival_ptr = tt->evp.sigev_value.sival_ptr;
si.si_code = SI_TIMER;

130
winsup/cygwin/tlsoffsets.h
View File

@ -1,125 +1,133 @@
//;# autogenerated: Do not edit.
//; $tls::sizeof__cygtls = 3996;
//; $tls::func = -3996;
//; $tls::sizeof__cygtls = 4212;
//; $tls::func = -4212;
//; $tls::pfunc = 0;
//; $tls::saved_errno = -3992;
//; $tls::saved_errno = -4208;
//; $tls::psaved_errno = 4;
//; $tls::sa_flags = -3988;
//; $tls::sa_flags = -4204;
//; $tls::psa_flags = 8;
//; $tls::oldmask = -3984;
//; $tls::oldmask = -4200;
//; $tls::poldmask = 12;
//; $tls::deltamask = -3980;
//; $tls::deltamask = -4196;
//; $tls::pdeltamask = 16;
//; $tls::event = -3976;
//; $tls::event = -4192;
//; $tls::pevent = 20;
//; $tls::errno_addr = -3972;
//; $tls::errno_addr = -4188;
//; $tls::perrno_addr = 24;
//; $tls::initialized = -3968;
//; $tls::initialized = -4184;
//; $tls::pinitialized = 28;
//; $tls::sigmask = -3964;
//; $tls::sigmask = -4180;
//; $tls::psigmask = 32;
//; $tls::sigwait_mask = -3960;
//; $tls::sigwait_mask = -4176;
//; $tls::psigwait_mask = 36;
//; $tls::sigwait_info = -3956;
//; $tls::sigwait_info = -4172;
//; $tls::psigwait_info = 40;
//; $tls::thread_context = -4168;
//; $tls::pthread_context = 44;
//; $tls::thread_id = -3956;
//; $tls::pthread_id = 256;
//; $tls::threadkill = -3952;
//; $tls::pthreadkill = 44;
//; $tls::pthreadkill = 260;
//; $tls::infodata = -3948;
//; $tls::pinfodata = 48;
//; $tls::pinfodata = 264;
//; $tls::tid = -3800;
//; $tls::ptid = 196;
//; $tls::ptid = 412;
//; $tls::local_clib = -3796;
//; $tls::plocal_clib = 200;
//; $tls::plocal_clib = 416;
//; $tls::__dontuse = -3796;
//; $tls::p__dontuse = 200;
//; $tls::p__dontuse = 416;
//; $tls::locals = -2732;
//; $tls::plocals = 1264;
//; $tls::plocals = 1480;
//; $tls::_ctinfo = -1100;
//; $tls::p_ctinfo = 2896;
//; $tls::p_ctinfo = 3112;
//; $tls::el = -1096;
//; $tls::pel = 2900;
//; $tls::pel = 3116;
//; $tls::andreas = -1088;
//; $tls::pandreas = 2908;
//; $tls::pandreas = 3124;
//; $tls::wq = -1080;
//; $tls::pwq = 2916;
//; $tls::pwq = 3132;
//; $tls::prev = -1052;
//; $tls::pprev = 2944;
//; $tls::pprev = 3160;
//; $tls::next = -1048;
//; $tls::pnext = 2948;
//; $tls::pnext = 3164;
//; $tls::sig = -1044;
//; $tls::psig = 2952;
//; $tls::psig = 3168;
//; $tls::incyg = -1040;
//; $tls::pincyg = 2956;
//; $tls::pincyg = 3172;
//; $tls::spinning = -1036;
//; $tls::pspinning = 2960;
//; $tls::pspinning = 3176;
//; $tls::stacklock = -1032;
//; $tls::pstacklock = 2964;
//; $tls::pstacklock = 3180;
//; $tls::stackptr = -1028;
//; $tls::pstackptr = 2968;
//; $tls::pstackptr = 3184;
//; $tls::stack = -1024;
//; $tls::pstack = 2972;
//; $tls::pstack = 3188;
//; $tls::padding = 0;
//; $tls::ppadding = 3996;
//; $tls::ppadding = 4212;
//; __DATA__
#define tls_func (-3996)
#define tls_func (-4212)
#define tls_pfunc (0)
#define tls_saved_errno (-3992)
#define tls_saved_errno (-4208)
#define tls_psaved_errno (4)
#define tls_sa_flags (-3988)
#define tls_sa_flags (-4204)
#define tls_psa_flags (8)
#define tls_oldmask (-3984)
#define tls_oldmask (-4200)
#define tls_poldmask (12)
#define tls_deltamask (-3980)
#define tls_deltamask (-4196)
#define tls_pdeltamask (16)
#define tls_event (-3976)
#define tls_event (-4192)
#define tls_pevent (20)
#define tls_errno_addr (-3972)
#define tls_errno_addr (-4188)
#define tls_perrno_addr (24)
#define tls_initialized (-3968)
#define tls_initialized (-4184)
#define tls_pinitialized (28)
#define tls_sigmask (-3964)
#define tls_sigmask (-4180)
#define tls_psigmask (32)
#define tls_sigwait_mask (-3960)
#define tls_sigwait_mask (-4176)
#define tls_psigwait_mask (36)
#define tls_sigwait_info (-3956)
#define tls_sigwait_info (-4172)
#define tls_psigwait_info (40)
#define tls_thread_context (-4168)
#define tls_pthread_context (44)
#define tls_thread_id (-3956)
#define tls_pthread_id (256)
#define tls_threadkill (-3952)
#define tls_pthreadkill (44)
#define tls_pthreadkill (260)
#define tls_infodata (-3948)
#define tls_pinfodata (48)
#define tls_pinfodata (264)
#define tls_tid (-3800)
#define tls_ptid (196)
#define tls_ptid (412)
#define tls_local_clib (-3796)
#define tls_plocal_clib (200)
#define tls_plocal_clib (416)
#define tls___dontuse (-3796)
#define tls_p__dontuse (200)
#define tls_p__dontuse (416)
#define tls_locals (-2732)
#define tls_plocals (1264)
#define tls_plocals (1480)
#define tls__ctinfo (-1100)
#define tls_p_ctinfo (2896)
#define tls_p_ctinfo (3112)
#define tls_el (-1096)
#define tls_pel (2900)
#define tls_pel (3116)
#define tls_andreas (-1088)
#define tls_pandreas (2908)
#define tls_pandreas (3124)
#define tls_wq (-1080)
#define tls_pwq (2916)
#define tls_pwq (3132)
#define tls_prev (-1052)
#define tls_pprev (2944)
#define tls_pprev (3160)
#define tls_next (-1048)
#define tls_pnext (2948)
#define tls_pnext (3164)
#define tls_sig (-1044)
#define tls_psig (2952)
#define tls_psig (3168)
#define tls_incyg (-1040)
#define tls_pincyg (2956)
#define tls_pincyg (3172)
#define tls_spinning (-1036)
#define tls_pspinning (2960)
#define tls_pspinning (3176)
#define tls_stacklock (-1032)
#define tls_pstacklock (2964)
#define tls_pstacklock (3180)
#define tls_stackptr (-1028)
#define tls_pstackptr (2968)
#define tls_pstackptr (3184)
#define tls_stack (-1024)
#define tls_pstack (2972)
#define tls_pstack (3188)
#define tls_padding (0)
#define tls_ppadding (3996)
#define tls_ppadding (4212)