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* cygtls.cc (_cygtls::fixup_after_fork): Remove unneeded setting of oldmask.

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* exceptions.cc: Remove some __I386__ conditionals.
(handle_exceptions): Move ppid test to outside of a loop for efficiency.
(setup_handler): Make debugging output more wordy.
(_cygtls::call_signal_handler): To avoid a race, use lock/unlock to synchronize
with signal thread and ensure that signal_arrived event has actually been set.
* gendef (_sigfe): Use ebx for all sigstack manipulations to ensure that the
register is saved.  Move setting of incyg to within stack lock to avoid
setup_handler confusion.
(_sigbe): Use ebx for all sigstack manipulations to ensure that the register is
saved.
(_cygtls::pop): Ditto.
(_cygtls::lock): Ditto.
(stabilize_sig_stack): Ditto.
(setjmp): Ditto.
(longjmp): Ditto.
This commit is contained in:
Christopher Faylor
2004-03-12 02:07:39 +00:00
parent 2c4ef10a55
commit 7ea8e226ee
4 changed files with 93 additions and 100 deletions
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72
winsup/cygwin/exceptions.cc
View File

@@ -187,30 +187,18 @@ exception (EXCEPTION_RECORD *e, CONTEXT *in)
}
}
#ifdef __i386__
#define HAVE_STATUS
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 ("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\r\n",
in->Ebp, in->Esp, myself->progname);
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",
in->Ebp, in->Esp, myself->progname, myself->pid, cygthread::name ());
small_printf ("cs=%04x ds=%04x es=%04x fs=%04x gs=%04x ss=%04x\r\n",
in->SegCs, in->SegDs, in->SegEs, in->SegFs, in->SegGs, in->SegSs);
#endif
#ifndef HAVE_STATUS
system_printf ("Had an exception");
#endif
in->SegCs, in->SegDs, in->SegEs, in->SegFs, in->SegGs, in->SegSs);
}
#ifdef __i386__
/* Print a stack backtrace. */
#define HAVE_STACK_TRACE
/* A class for manipulating the stack. */
class stack_info
{
@@ -300,7 +288,7 @@ stackdump (DWORD ebp, int open_file, bool isexception)
small_printf ("%s%08x", j == 0 ? " (" : ", ", thestack.sf.Params[j]);
small_printf (")\r\n");
}
small_printf ("End of stack trace%s",
small_printf ("End of stack trace%s\n",
i == 16 ? " (more stack frames may be present)" : "");
}
@@ -526,13 +514,13 @@ handle_exceptions (EXCEPTION_RECORD *e0, void *frame, CONTEXT *in0, void *)
|| (void *) global_sigs[si.si_signo].sa_handler == (void *) SIG_ERR)
{
/* Print the exception to the console */
for (int i = 0; status_info[i].name; i++)
if (status_info[i].code == e.ExceptionCode)
{
if (!myself->ppid_handle)
if (!myself->ppid_handle)
for (int i = 0; status_info[i].name; i++)
if (status_info[i].code == e.ExceptionCode)
{
system_printf ("Exception: %s", status_info[i].name);
break;
}
break;
}
/* Another exception could happen while tracing or while exiting.
Only do this once. */
@@ -565,23 +553,11 @@ handle_exceptions (EXCEPTION_RECORD *e0, void *frame, CONTEXT *in0, void *)
sig_send (NULL, si, &_my_tls); // Signal myself
return 1;
}
#endif /* __i386__ */
#ifndef HAVE_STACK_TRACE
void
stack (void)
{
system_printf ("Stack trace not yet supported on this machine.");
}
#endif
/* Utilities to call a user supplied exception handler. */
#define SIG_NONMASKABLE (SIGTOMASK (SIGKILL) | SIGTOMASK (SIGSTOP))
#ifdef __i386__
#define HAVE_CALL_HANDLER
/* Non-raceable sigsuspend
* Note: This implementation is based on the Single UNIX Specification
* man page. This indicates that sigsuspend always returns -1 and that
@@ -692,8 +668,7 @@ interruptible (DWORD pc)
return res;
}
void __stdcall
_cygtls::interrupt_setup (int sig, void *handler,
struct sigaction& siga)
_cygtls::interrupt_setup (int sig, void *handler, struct sigaction& siga)
{
push ((__stack_t) sigdelayed, false);
oldmask = myself->getsigmask ();
@@ -718,7 +693,7 @@ _cygtls::interrupt_setup (int sig, void *handler,
bool
_cygtls::interrupt_now (CONTEXT *ctx, int sig, void *handler,
struct sigaction& siga)
struct sigaction& siga)
{
push ((__stack_t) ctx->Eip, false);
interrupt_setup (sig, handler, siga);
@@ -755,9 +730,10 @@ setup_handler (int sig, void *handler, struct sigaction& siga, _cygtls *tls)
tls->lock ();
if (tls->incyg || tls->in_exception ())
{
sigproc_printf ("controlled interrupt. incyg %d, exception %d, stackptr %p, stack %p, stackptr[-1] %p",
tls->incyg, tls->in_exception (), tls->stackptr, tls->stack, tls->stackptr[-1]);
tls->reset_exception ();
tls->interrupt_setup (sig, handler, siga);
sigproc_printf ("interrupted known cygwin routine");
interrupted = true;
tls->unlock ();
break;
@@ -791,7 +767,10 @@ setup_handler (int sig, void *handler, struct sigaction& siga, _cygtls *tls)
(void) ResumeThread (hth);
break;
}
if (!tls->incyg && !tls->in_exception () && !tls->spinning && !tls->locked ())
if (tls->incyg || tls->in_exception () || tls->spinning || tls->locked ())
sigproc_printf ("incyg %d, in_exception %d, spinning %d, locked %d\n",
tls->incyg, tls->in_exception (), tls->spinning, tls->locked ());
else
{
cx.ContextFlags = CONTEXT_CONTROL | CONTEXT_INTEGER;
if (!GetThreadContext (hth, &cx))
@@ -818,11 +797,6 @@ out:
sigproc_printf ("signal %d %sdelivered", sig, interrupted ? "" : "not ");
return interrupted;
}
#endif /* i386 */
#ifndef HAVE_CALL_HANDLER
#error "Need to supply machine dependent setup_handler"
#endif
/* Keyboard interrupt handler. */
static BOOL WINAPI
@@ -1168,10 +1142,10 @@ int
_cygtls::call_signal_handler ()
{
int this_sa_flags = 0;
/* Call signal handler. No need to set stacklock since sig effectively
implies that. */
/* Call signal handler. */
while (sig)
{
lock (); unlock (); // make sure synchronized
this_sa_flags = sa_flags;
int thissig = sig;
void (*sigfunc) (int) = func;
@@ -1196,7 +1170,9 @@ _cygtls::call_signal_handler ()
extern "C" void __stdcall
reset_signal_arrived ()
{
// NEEDED? WaitForSingleObject (signal_arrived, 10);
(void) ResetEvent (signal_arrived);
sigproc_printf ("reset signal_arrived");
if (_my_tls.stackptr > _my_tls.stack) debug_printf ("stackptr[-1] %p", _my_tls.stackptr[-1]);
if (_my_tls.stackptr > _my_tls.stack)
debug_printf ("stackptr[-1] %p", _my_tls.stackptr[-1]);
}