/* Host support routines for MinGW, for GDB, the GNU debugger.
- Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011
- Free Software Foundation, Inc.
+ Copyright (C) 2006-2018 Free Software Foundation, Inc.
This file is part of GDB.
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
+#include "main.h"
#include "serial.h"
#include "event-loop.h"
-#include "gdb_assert.h"
#include "gdb_select.h"
-#include "gdb_string.h"
#include "readline/readline.h"
#include <windows.h>
-/* This event is signalled whenever an asynchronous SIGINT handler
- needs to perform an action in the main thread. */
-static HANDLE sigint_event;
-
-/* When SIGINT_EVENT is signalled, gdb_select will call this
- function. */
-struct async_signal_handler *sigint_handler;
-
-/* The strerror() function can return NULL for errno values that are
- out of range. Provide a "safe" version that always returns a
- printable string.
-
- The Windows runtime implementation of strerror never returns NULL,
- but does return a useless string for anything above sys_nerr;
- unfortunately this includes all socket-related error codes.
- This replacement tries to find a system-provided error message. */
+/* Return an absolute file name of the running GDB, if possible, or
+ ARGV0 if not. The return value is in malloc'ed storage. */
char *
-safe_strerror (int errnum)
+windows_get_absolute_argv0 (const char *argv0)
{
- static char *buffer;
- int len;
-
- if (errnum >= 0 && errnum < sys_nerr)
- return strerror (errnum);
-
- if (buffer)
- {
- LocalFree (buffer);
- buffer = NULL;
- }
+ char full_name[PATH_MAX];
- if (FormatMessage (FORMAT_MESSAGE_ALLOCATE_BUFFER
- | FORMAT_MESSAGE_FROM_SYSTEM,
- NULL, errnum,
- MAKELANGID (LANG_NEUTRAL, SUBLANG_DEFAULT),
- (LPTSTR) &buffer, 0, NULL) == 0)
- {
- static char buf[32];
- xsnprintf (buf, sizeof buf, "(undocumented errno %d)", errnum);
- return buf;
- }
-
- /* Windows error messages end with a period and a CR-LF; strip that
- out. */
- len = strlen (buffer);
- if (len > 3 && strcmp (buffer + len - 3, ".\r\n") == 0)
- buffer[len - 3] = '\0';
-
- return buffer;
+ if (GetModuleFileName (NULL, full_name, PATH_MAX))
+ return xstrdup (full_name);
+ return xstrdup (argv0);
}
/* Wrapper for select. On Windows systems, where the select interface
}
}
- gdb_assert (num_handles < MAXIMUM_WAIT_OBJECTS);
- handles[num_handles++] = sigint_event;
+ gdb_assert (num_handles <= MAXIMUM_WAIT_OBJECTS);
event = WaitForMultipleObjects (num_handles,
handles,
while (RL_ISSTATE (RL_STATE_SIGHANDLER))
Sleep (1);
- if (h == sigint_event
- || WaitForSingleObject (sigint_event, 0) == WAIT_OBJECT_0)
- {
- if (sigint_handler != NULL)
- call_async_signal_handler (sigint_handler);
-
- if (num_ready == 0)
- {
- errno = EINTR;
- return -1;
- }
- }
-
return num_ready;
}
-
-/* Wrapper for the body of signal handlers. On Windows systems, a
- SIGINT handler runs in its own thread. We can't longjmp from
- there, and we shouldn't even prompt the user. Delay HANDLER
- until the main thread is next in gdb_select. */
-
-void
-gdb_call_async_signal_handler (struct async_signal_handler *handler,
- int immediate_p)
-{
- if (immediate_p)
- sigint_handler = handler;
- else
- {
- mark_async_signal_handler (handler);
- sigint_handler = NULL;
- }
- SetEvent (sigint_event);
-}
-
-void
-_initialize_mingw_hdep (void)
-{
- sigint_event = CreateEvent (0, FALSE, FALSE, 0);
-}