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* cygtls.h (_cygtls::signal_debugger): Change argument type. 

(_cygtls::copy_context): Delete declaration.
* exceptions.cc (exception::handle): Don't call copy_context() here.  Move
signal_handler call earlier and always call it.
(_cygtls::copy_context): Delete definition.
(_cygtls::signal_debugger): Move copy_context logic here.  Suspend thread
receiving signal before gathering context information.
This commit is contained in:
Christopher Faylor 2013-03-09 21:55:18 +00:00
parent 6a375e0325
commit 56bc657ce4
3 changed files with 42 additions and 24 deletions
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10
winsup/cygwin/ChangeLog
View File

@ -1,3 +1,13 @@
2013-03-09 Christopher Faylor <me.cygwin2013@cgf.cx>
* cygtls.h (_cygtls::signal_debugger): Change argument type.
(_cygtls::copy_context): Delete declaration.
* exceptions.cc (exception::handle): Don't call copy_context() here.
Move signal_handler call earlier and always call it.
(_cygtls::copy_context): Delete definition.
(_cygtls::signal_debugger): Move copy_context logic here. Suspend
thread receiving signal before gathering context information.
2013-03-08 Christopher Faylor <me.cygwin2013@cgf.cx>
* spawn.cc (child_info_spawn::worker): Save and restore my_wr_proc_pipe

3
winsup/cygwin/cygtls.h
View File

@ -219,8 +219,7 @@ public:
void __reg3 interrupt_setup (siginfo_t&, void *, struct sigaction&);
bool inside_kernel (CONTEXT *);
void __reg2 copy_context (CONTEXT *);
void __reg2 signal_debugger (int);
void __reg2 signal_debugger (siginfo_t&);
#ifdef CYGTLS_HANDLE
operator HANDLE () const {return tid ? tid->win32_obj_id : NULL;}

53
winsup/cygwin/exceptions.cc
View File

@ -606,8 +606,6 @@ exception::handle (EXCEPTION_RECORD *e, exception_list *frame, CONTEXT *in, void
break;
}
me.copy_context (in);
/* Temporarily replace windows top level SEH with our own handler.
We don't want any Windows magic kicking in. This top level frame
will be removed automatically after our exception handler returns. */
@ -1162,6 +1160,10 @@ sigpacket::process ()
sigproc_printf ("using tls %p", tls);
}
/* Do stuff for gdb */
if ((HANDLE) *tls)
tls->signal_debugger (si);
void *handler = have_execed ? NULL : (void *) thissig.sa_handler;
if (handler == SIG_IGN)
@ -1233,18 +1235,6 @@ dosig:
}
dispatch_sig:
/* Do stuff for gdb */
if (si.si_code == SI_USER || !si.si_cyg)
{
CONTEXT c;
c.ContextFlags = CONTEXT_FULL;
GetThreadContext (hMainThread, &c);
_my_tls.copy_context (&c);
/* Tell gdb that we got a signal. Presumably, gdb already noticed this
if we hit an exception. */
_my_tls.signal_debugger (si.si_signo);
}
if (have_execed)
{
sigproc_printf ("terminating captive process");
@ -1312,18 +1302,37 @@ _cygtls::call_signal_handler ()
}
void
_cygtls::copy_context (CONTEXT *c)
{
memcpy (&thread_context, c, (&thread_context._internal - (unsigned char *) &thread_context));
}
void
_cygtls::signal_debugger (int sig)
_cygtls::signal_debugger (siginfo_t& si)
{
HANDLE th = NULL;
if (isinitialized () && being_debugged ())
{
CONTEXT c;
CONTEXT *pc;
if (si.si_cyg)
pc = ((cygwin_exception *) si.si_cyg)->context ();
else if (!(th = (HANDLE) *this))
return;
else
{
SuspendThread (th);
c.ContextFlags = CONTEXT_FULL;
if (GetThreadContext (th, &c))
pc = &c;
else
goto out;
if (incyg)
c.Eip = retaddr ();
}
memcpy (&thread_context, pc, (&thread_context._internal -
(unsigned char *) &thread_context));
char sigmsg[2 * sizeof (_CYGWIN_SIGNAL_STRING " ffffffff ffffffff")];
__small_sprintf (sigmsg, _CYGWIN_SIGNAL_STRING " %d %p %p", sig, thread_id, &thread_context);
__small_sprintf (sigmsg, _CYGWIN_SIGNAL_STRING " %d %p %p", si.si_signo,
thread_id, &thread_context);
OutputDebugString (sigmsg);
}
out:
if (th)
ResumeThread (th);
}