/* Top level stuff for GDB, the GNU debugger.
- Copyright (C) 1999-2019 Free Software Foundation, Inc.
+ Copyright (C) 1999-2020 Free Software Foundation, Inc.
Written by Elena Zannoni <ezannoni@cygnus.com> of Cygnus Solutions.
#include "gdbcmd.h" /* for dont_repeat() */
#include "annotate.h"
#include "maint.h"
-#include "common/buffer.h"
+#include "gdbsupport/buffer.h"
#include "ser-event.h"
#include "gdb_select.h"
+#include "gdbsupport/gdb-sigmask.h"
/* readline include files. */
#include "readline/readline.h"
ezannoni: as of 1999-04-29 I expect that this
variable will not be used after gdb is changed to use the event
loop as default engine, and event-top.c is merged into top.c. */
-int set_editing_cmd_var;
+bool set_editing_cmd_var;
/* This is used to display the notification of the completion of an
asynchronous execution command. */
-int exec_done_display_p = 0;
+bool exec_done_display_p = false;
/* Used by the stdin event handler to compensate for missed stdin events.
Setting this to a non-zero value inside an stdin callback makes the callback
}
/* Return the top level prompt, as specified by "set prompt", possibly
- overriden by the python gdb.prompt_hook hook, and then composed
+ overridden by the python gdb.prompt_hook hook, and then composed
with the prompt prefix and suffix (annotations). */
static std::string
}
\f
+/* See event-top.h. */
+
+thread_local void (*thread_local_segv_handler) (int);
+
+static void handle_sigsegv (int sig);
+
+/* Install the SIGSEGV handler. */
+static void
+install_handle_sigsegv ()
+{
+#if defined (HAVE_SIGACTION)
+ struct sigaction sa;
+ sa.sa_handler = handle_sigsegv;
+ sigemptyset (&sa.sa_mask);
+#ifdef HAVE_SIGALTSTACK
+ sa.sa_flags = SA_ONSTACK;
+#else
+ sa.sa_flags = 0;
+#endif
+ sigaction (SIGSEGV, &sa, nullptr);
+#else
+ signal (SIGSEGV, handle_sigsegv);
+#endif
+}
+
+/* Handler for SIGSEGV. */
+
+static void
+handle_sigsegv (int sig)
+{
+ install_handle_sigsegv ();
+
+ if (thread_local_segv_handler == nullptr)
+ abort (); /* ARI: abort */
+ thread_local_segv_handler (sig);
+}
+
+\f
+
/* The serial event associated with the QUIT flag. set_quit_flag sets
this, and check_quit_flag clears it. Used by interruptible_select
to be able to do interruptible I/O with no race with the SIGINT
sigtstp_token =
create_async_signal_handler (async_sigtstp_handler, NULL);
#endif
+
+ install_handle_sigsegv ();
}
/* See defs.h. */
sigset_t zero;
sigemptyset (&zero);
- sigprocmask (SIG_SETMASK, &zero, 0);
+ gdb_sigmask (SIG_SETMASK, &zero, 0);
}
#elif HAVE_SIGSETMASK
sigsetmask (0);
signal (sig, handle_sigfpe);
}
-/* Event loop will call this functin to process a SIGFPE. */
+/* Event loop will call this function to process a SIGFPE. */
static void
async_float_handler (gdb_client_data arg)
{