/* Low level interface to Windows debugging, for gdbserver.
- Copyright (C) 2006, 2007 Free Software Foundation, Inc.
+ Copyright (C) 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
Contributed by Leo Zayas. Based on "win32-nat.c" from GDB.
#include "server.h"
#include "regcache.h"
#include "gdb/signals.h"
+#include "gdb/fileio.h"
#include "mem-break.h"
#include "win32-low.h"
int using_threads = 1;
/* Globals. */
+static int attaching = 0;
static HANDLE current_process_handle = NULL;
static DWORD current_process_id = 0;
+static DWORD main_thread_id = 0;
static enum target_signal last_sig = TARGET_SIGNAL_0;
/* The current debug event from WaitForDebugEvent. */
static DEBUG_EVENT current_event;
+/* Non zero if an interrupt request is to be satisfied by suspending
+ all threads. */
+static int soft_interrupt_requested = 0;
+
+/* Non zero if the inferior is stopped in a simulated breakpoint done
+ by suspending all the threads. */
+static int faked_breakpoint = 0;
+
#define NUM_REGS (the_low_target.num_regs)
typedef BOOL WINAPI (*winapi_DebugActiveProcessStop) (DWORD dwProcessId);
typedef BOOL WINAPI (*winapi_DebugBreakProcess) (HANDLE);
typedef BOOL WINAPI (*winapi_GenerateConsoleCtrlEvent) (DWORD, DWORD);
-static DWORD main_thread_id = 0;
-
-static void win32_resume (struct thread_resume *resume_info);
+static void win32_resume (struct thread_resume *resume_info, size_t n);
/* Get the thread ID from the current selected inferior (the current
thread). */
return th->tid;
}
+/* Get the thread context of the thread associated with TH. */
+
+static void
+win32_get_thread_context (win32_thread_info *th)
+{
+ memset (&th->context, 0, sizeof (CONTEXT));
+ (*the_low_target.get_thread_context) (th, ¤t_event);
+#ifdef _WIN32_WCE
+ memcpy (&th->base_context, &th->context, sizeof (CONTEXT));
+#endif
+}
+
+/* Set the thread context of the thread associated with TH. */
+
+static void
+win32_set_thread_context (win32_thread_info *th)
+{
+#ifdef _WIN32_WCE
+ /* Calling SuspendThread on a thread that is running kernel code
+ will report that the suspending was successful, but in fact, that
+ will often not be true. In those cases, the context returned by
+ GetThreadContext will not be correct by the time the thread
+ stops, hence we can't set that context back into the thread when
+ resuming - it will most likelly crash the inferior.
+ Unfortunately, there is no way to know when the thread will
+ really stop. To work around it, we'll only write the context
+ back to the thread when either the user or GDB explicitly change
+ it between stopping and resuming. */
+ if (memcmp (&th->context, &th->base_context, sizeof (CONTEXT)) != 0)
+#endif
+ (*the_low_target.set_thread_context) (th, ¤t_event);
+}
+
/* Find a thread record given a thread id. If GET_CONTEXT is set then
also retrieve the context for this thread. */
static win32_thread_info *
return NULL;
th = inferior_target_data (thread);
- if (!th->suspend_count && get_context)
+ if (get_context && th->context.ContextFlags == 0)
{
- if (id != current_event.dwThreadId)
- th->suspend_count = SuspendThread (th->h) + 1;
+ if (!th->suspended)
+ {
+ if (SuspendThread (th->h) == (DWORD) -1)
+ {
+ DWORD err = GetLastError ();
+ OUTMSG (("warning: SuspendThread failed in thread_rec, "
+ "(error %d): %s\n", (int) err, strwinerror (err)));
+ }
+ else
+ th->suspended = 1;
+ }
- (*the_low_target.get_thread_context) (th, ¤t_event);
+ win32_get_thread_context (th);
}
return th;
if ((th = thread_rec (tid, FALSE)))
return th;
- th = (win32_thread_info *) malloc (sizeof (*th));
- memset (th, 0, sizeof (*th));
+ th = xcalloc (1, sizeof (*th));
th->tid = tid;
th->h = h;
}
static void
-do_initial_child_stuff (DWORD pid)
+do_initial_child_stuff (HANDLE proch, DWORD pid)
{
last_sig = TARGET_SIGNAL_0;
+ current_process_handle = proch;
+ current_process_id = pid;
+ main_thread_id = 0;
+
+ soft_interrupt_requested = 0;
+ faked_breakpoint = 0;
+
memset (¤t_event, 0, sizeof (current_event));
child_init_thread_list ();
struct thread_info *thread = (struct thread_info *) this_thread;
int thread_id = * (int *) id_ptr;
win32_thread_info *th = inferior_target_data (thread);
- int i;
if ((thread_id == -1 || thread_id == th->tid)
- && th->suspend_count)
+ && th->suspended)
{
if (th->context.ContextFlags)
{
- (*the_low_target.set_thread_context) (th, ¤t_event);
+ win32_set_thread_context (th);
th->context.ContextFlags = 0;
}
- for (i = 0; i < th->suspend_count; i++)
- (void) ResumeThread (th->h);
- th->suspend_count = 0;
+ if (ResumeThread (th->h) == (DWORD) -1)
+ {
+ DWORD err = GetLastError ();
+ OUTMSG (("warning: ResumeThread failed in continue_one_thread, "
+ "(error %d): %s\n", (int) err, strwinerror (err)));
+ }
+ th->suspended = 0;
}
return 0;
static BOOL
child_continue (DWORD continue_status, int thread_id)
{
- BOOL res;
+ /* The inferior will only continue after the ContinueDebugEvent
+ call. */
+ find_inferior (&all_threads, continue_one_thread, &thread_id);
+ faked_breakpoint = 0;
- res = ContinueDebugEvent (current_event.dwProcessId,
- current_event.dwThreadId, continue_status);
- if (res)
- find_inferior (&all_threads, continue_one_thread, &thread_id);
+ if (!ContinueDebugEvent (current_event.dwProcessId,
+ current_event.dwThreadId,
+ continue_status))
+ return FALSE;
- return res;
+ return TRUE;
}
/* Fetch register(s) from the current thread context. */
mbstowcs (wargs, args, argslen + 1);
ret = CreateProcessW (wprogram, /* image name */
- wargs, /* command line */
- NULL, /* security, not supported */
- NULL, /* thread, not supported */
- FALSE, /* inherit handles, not supported */
- flags, /* start flags */
- NULL, /* environment, not supported */
- NULL, /* current directory, not supported */
- NULL, /* start info, not supported */
- pi); /* proc info */
+ wargs, /* command line */
+ NULL, /* security, not supported */
+ NULL, /* thread, not supported */
+ FALSE, /* inherit handles, not supported */
+ flags, /* start flags */
+ NULL, /* environment, not supported */
+ NULL, /* current directory, not supported */
+ NULL, /* start info, not supported */
+ pi); /* proc info */
#else
STARTUPINFOA si = { sizeof (STARTUPINFOA) };
PROCESS_INFORMATION pi;
DWORD err;
+ /* win32_wait needs to know we're not attaching. */
+ attaching = 0;
+
if (!program)
error ("No executable specified, specify executable to debug.\n");
for (argc = 1; program_args[argc]; argc++)
{
/* FIXME: Can we do better about quoting? How does Cygwin
- handle this? */
+ handle this? */
strcat (args, " ");
strcat (args, program_args[argc]);
}
CloseHandle (pi.hThread);
#endif
- current_process_handle = pi.hProcess;
- current_process_id = pi.dwProcessId;
-
- do_initial_child_stuff (current_process_id);
+ do_initial_child_stuff (pi.hProcess, pi.dwProcessId);
return current_process_id;
}
static int
win32_attach (unsigned long pid)
{
- winapi_DebugActiveProcessStop DebugActiveProcessStop = NULL;
+ HANDLE h;
winapi_DebugSetProcessKillOnExit DebugSetProcessKillOnExit = NULL;
+ DWORD err;
#ifdef _WIN32_WCE
HMODULE dll = GetModuleHandle (_T("COREDLL.DLL"));
#else
HMODULE dll = GetModuleHandle (_T("KERNEL32.DLL"));
#endif
- DebugActiveProcessStop = GETPROCADDRESS (dll, DebugActiveProcessStop);
DebugSetProcessKillOnExit = GETPROCADDRESS (dll, DebugSetProcessKillOnExit);
- if (DebugActiveProcess (pid))
+ h = OpenProcess (PROCESS_ALL_ACCESS, FALSE, pid);
+ if (h != NULL)
{
- if (DebugSetProcessKillOnExit != NULL)
- DebugSetProcessKillOnExit (FALSE);
-
- current_process_handle = OpenProcess (PROCESS_ALL_ACCESS, FALSE, pid);
-
- if (current_process_handle != NULL)
- {
- current_process_id = pid;
- do_initial_child_stuff (pid);
- return 0;
- }
- if (DebugActiveProcessStop != NULL)
- DebugActiveProcessStop (current_process_id);
+ if (DebugActiveProcess (pid))
+ {
+ if (DebugSetProcessKillOnExit != NULL)
+ DebugSetProcessKillOnExit (FALSE);
+
+ /* win32_wait needs to know we're attaching. */
+ attaching = 1;
+ do_initial_child_stuff (h, pid);
+ return 0;
+ }
+
+ CloseHandle (h);
}
- error ("Attach to process failed.");
+ err = GetLastError ();
+ error ("Attach to process failed (error %d): %s\n",
+ (int) err, strwinerror (err));
}
/* Handle OUTPUT_DEBUG_STRING_EVENT from child process. */
if (current_event.u.DebugString.fUnicode)
{
/* The event tells us how many bytes, not chars, even
- in Unicode. */
+ in Unicode. */
WCHAR buffer[(READ_BUFFER_LEN + 1) / sizeof (WCHAR)] = { 0 };
if (read_inferior_memory (addr, (unsigned char *) buffer, nbytes) != 0)
return;
#undef READ_BUFFER_LEN
}
+static void
+win32_clear_inferiors (void)
+{
+ if (current_process_handle != NULL)
+ CloseHandle (current_process_handle);
+
+ for_each_inferior (&all_threads, delete_thread_info);
+ clear_inferiors ();
+}
+
/* Kill all inferiors. */
static void
win32_kill (void)
{
- win32_thread_info *current_thread;
-
if (current_process_handle == NULL)
return;
break;
else if (current_event.dwDebugEventCode == OUTPUT_DEBUG_STRING_EVENT)
{
- struct target_waitstatus our_status = { 0 };
+ struct target_waitstatus our_status = { 0 };
handle_output_debug_string (&our_status);
- }
+ }
}
- CloseHandle (current_process_handle);
-
- current_thread = inferior_target_data (current_inferior);
- if (current_thread && current_thread->h)
- {
- /* This may fail in an attached process, so don't check. */
- (void) CloseHandle (current_thread->h);
- }
+ win32_clear_inferiors ();
}
/* Detach from all inferiors. */
static int
win32_detach (void)
{
- HANDLE h;
-
winapi_DebugActiveProcessStop DebugActiveProcessStop = NULL;
winapi_DebugSetProcessKillOnExit DebugSetProcessKillOnExit = NULL;
#ifdef _WIN32_WCE
|| DebugActiveProcessStop == NULL)
return -1;
- /* We need a new handle, since DebugActiveProcessStop
- closes all the ones that came through the events. */
- if ((h = OpenProcess (PROCESS_ALL_ACCESS,
- FALSE,
- current_process_id)) == NULL)
- {
- /* The process died. */
- return -1;
- }
-
{
struct thread_resume resume;
resume.thread = -1;
resume.step = 0;
resume.sig = 0;
- resume.leave_stopped = 0;
- win32_resume (&resume);
+ win32_resume (&resume, 1);
}
if (!DebugActiveProcessStop (current_process_id))
- {
- CloseHandle (h);
- return -1;
- }
+ return -1;
+
DebugSetProcessKillOnExit (FALSE);
- current_process_handle = h;
+ win32_clear_inferiors ();
return 0;
}
static void
win32_join (void)
{
- if (current_process_id == 0
- || current_process_handle == NULL)
- return;
-
- WaitForSingleObject (current_process_handle, INFINITE);
- CloseHandle (current_process_handle);
+ extern unsigned long signal_pid;
- current_process_handle = NULL;
- current_process_id = 0;
+ HANDLE h = OpenProcess (PROCESS_ALL_ACCESS, FALSE, signal_pid);
+ if (h != NULL)
+ {
+ WaitForSingleObject (h, INFINITE);
+ CloseHandle (h);
+ }
}
/* Return 1 iff the thread with thread ID TID is alive. */
/* Resume the inferior process. RESUME_INFO describes how we want
to resume. */
static void
-win32_resume (struct thread_resume *resume_info)
+win32_resume (struct thread_resume *resume_info, size_t n)
{
DWORD tid;
enum target_signal sig;
/* This handles the very limited set of resume packets that GDB can
currently produce. */
- if (resume_info[0].thread == -1)
+ if (n == 1 && resume_info[0].thread == -1)
tid = -1;
- else if (resume_info[1].thread == -1 && !resume_info[1].leave_stopped)
+ else if (n > 1)
tid = -1;
else
/* Yes, we're ignoring resume_info[0].thread. It'd be tricky to make
"in this configuration.\n");
}
- (*the_low_target.set_thread_context) (th, ¤t_event);
+ win32_set_thread_context (th);
th->context.ContextFlags = 0;
}
}
#ifdef _WIN32_WCE
/* Remove the initial breakpoint. */
check_breakpoints ((CORE_ADDR) (long) current_event
- .u.Exception.ExceptionRecord.ExceptionAddress);
+ .u.Exception.ExceptionRecord.ExceptionAddress);
#endif
break;
case DBG_CONTROL_C:
last_sig = ourstatus->value.sig;
}
-/* Get the next event from the child. */
+
static void
-get_child_debug_event (struct target_waitstatus *ourstatus)
+suspend_one_thread (struct inferior_list_entry *entry)
+{
+ struct thread_info *thread = (struct thread_info *) entry;
+ win32_thread_info *th = inferior_target_data (thread);
+
+ if (!th->suspended)
+ {
+ if (SuspendThread (th->h) == (DWORD) -1)
+ {
+ DWORD err = GetLastError ();
+ OUTMSG (("warning: SuspendThread failed in suspend_one_thread, "
+ "(error %d): %s\n", (int) err, strwinerror (err)));
+ }
+ else
+ th->suspended = 1;
+ }
+}
+
+static void
+fake_breakpoint_event (void)
{
- BOOL debug_event;
+ OUTMSG2(("fake_breakpoint_event\n"));
+
+ faked_breakpoint = 1;
+ memset (¤t_event, 0, sizeof (current_event));
+ current_event.dwThreadId = main_thread_id;
+ current_event.dwDebugEventCode = EXCEPTION_DEBUG_EVENT;
+ current_event.u.Exception.ExceptionRecord.ExceptionCode
+ = EXCEPTION_BREAKPOINT;
+
+ for_each_inferior (&all_threads, suspend_one_thread);
+}
+
+#ifdef _WIN32_WCE
+static int
+auto_delete_breakpoint (CORE_ADDR stop_pc)
+{
+ return 1;
+}
+#endif
+
+/* Get the next event from the child. */
+
+static int
+get_child_debug_event (struct target_waitstatus *ourstatus)
+{
last_sig = TARGET_SIGNAL_0;
ourstatus->kind = TARGET_WAITKIND_SPURIOUS;
- /* Keep the wait time low enough for confortable remote interruption,
- but high enough so gdbserver doesn't become a bottleneck. */
- if (!(debug_event = WaitForDebugEvent (¤t_event, 250)))
- return;
+ /* Check if GDB sent us an interrupt request. */
+ check_remote_input_interrupt_request ();
+
+ if (soft_interrupt_requested)
+ {
+ soft_interrupt_requested = 0;
+ fake_breakpoint_event ();
+ goto gotevent;
+ }
+
+#ifndef _WIN32_WCE
+ attaching = 0;
+#else
+ if (attaching)
+ {
+ /* WinCE doesn't set an initial breakpoint automatically. To
+ stop the inferior, we flush all currently pending debug
+ events -- the thread list and the dll list are always
+ reported immediatelly without delay, then, we suspend all
+ threads and pretend we saw a trap at the current PC of the
+ main thread.
+
+ Contrary to desktop Windows, Windows CE *does* report the dll
+ names on LOAD_DLL_DEBUG_EVENTs resulting from a
+ DebugActiveProcess call. This limits the way we can detect
+ if all the dlls have already been reported. If we get a real
+ debug event before leaving attaching, the worst that will
+ happen is the user will see a spurious breakpoint. */
+
+ current_event.dwDebugEventCode = 0;
+ if (!WaitForDebugEvent (¤t_event, 0))
+ {
+ OUTMSG2(("no attach events left\n"));
+ fake_breakpoint_event ();
+ attaching = 0;
+ }
+ else
+ OUTMSG2(("got attach event\n"));
+ }
+ else
+#endif
+ {
+ /* Keep the wait time low enough for confortable remote
+ interruption, but high enough so gdbserver doesn't become a
+ bottleneck. */
+ if (!WaitForDebugEvent (¤t_event, 250))
+ return 0;
+ }
+
+ gotevent:
current_inferior =
(struct thread_info *) find_inferior_id (&all_threads,
ourstatus->value.related_pid = current_event.dwThreadId;
#ifdef _WIN32_WCE
- /* Windows CE doesn't set the initial breakpoint automatically
- like the desktop versions of Windows do. We add it explicitly
- here. It will be removed as soon as it is hit. */
- set_breakpoint_at ((CORE_ADDR) (long) current_event.u
- .CreateProcessInfo.lpStartAddress,
- delete_breakpoint_at);
+ if (!attaching)
+ {
+ /* Windows CE doesn't set the initial breakpoint
+ automatically like the desktop versions of Windows do.
+ We add it explicitly here. It will be removed as soon as
+ it is hit. */
+ set_breakpoint_at ((CORE_ADDR) (long) current_event.u
+ .CreateProcessInfo.lpStartAddress,
+ auto_delete_breakpoint);
+ }
#endif
break;
(unsigned) current_event.dwThreadId));
ourstatus->kind = TARGET_WAITKIND_EXITED;
ourstatus->value.integer = current_event.u.ExitProcess.dwExitCode;
+ child_continue (DBG_CONTINUE, -1);
CloseHandle (current_process_handle);
current_process_handle = NULL;
break;
current_inferior =
(struct thread_info *) find_inferior_id (&all_threads,
current_event.dwThreadId);
+ return 1;
}
/* Wait for the inferior process to change state.
while (1)
{
- /* Check if GDB sent us an interrupt request. */
- check_remote_input_interrupt_request ();
-
- get_child_debug_event (&our_status);
+ if (!get_child_debug_event (&our_status))
+ continue;
switch (our_status.kind)
{
our_status.value.integer));
*status = 'W';
+ win32_clear_inferiors ();
return our_status.value.integer;
case TARGET_WAITKIND_STOPPED:
- case TARGET_WAITKIND_LOADED:
+ case TARGET_WAITKIND_LOADED:
OUTMSG2 (("Child Stopped with signal = %d \n",
our_status.value.sig));
}
return our_status.value.sig;
- default:
+ default:
OUTMSG (("Ignoring unknown internal event, %d\n", our_status.kind));
- /* fall-through */
- case TARGET_WAITKIND_SPURIOUS:
- case TARGET_WAITKIND_EXECD:
+ /* fall-through */
+ case TARGET_WAITKIND_SPURIOUS:
+ case TARGET_WAITKIND_EXECD:
/* do nothing, just continue */
child_continue (DBG_CONTINUE, -1);
break;
&& DebugBreakProcess (current_process_handle))
return;
- OUTMSG (("Could not interrupt process.\n"));
+ /* Last resort, suspend all threads manually. */
+ soft_interrupt_requested = 1;
+}
+
+#ifdef _WIN32_WCE
+int
+win32_error_to_fileio_error (DWORD err)
+{
+ switch (err)
+ {
+ case ERROR_BAD_PATHNAME:
+ case ERROR_FILE_NOT_FOUND:
+ case ERROR_INVALID_NAME:
+ case ERROR_PATH_NOT_FOUND:
+ return FILEIO_ENOENT;
+ case ERROR_CRC:
+ case ERROR_IO_DEVICE:
+ case ERROR_OPEN_FAILED:
+ return FILEIO_EIO;
+ case ERROR_INVALID_HANDLE:
+ return FILEIO_EBADF;
+ case ERROR_ACCESS_DENIED:
+ case ERROR_SHARING_VIOLATION:
+ return FILEIO_EACCES;
+ case ERROR_NOACCESS:
+ return FILEIO_EFAULT;
+ case ERROR_BUSY:
+ return FILEIO_EBUSY;
+ case ERROR_ALREADY_EXISTS:
+ case ERROR_FILE_EXISTS:
+ return FILEIO_EEXIST;
+ case ERROR_BAD_DEVICE:
+ return FILEIO_ENODEV;
+ case ERROR_DIRECTORY:
+ return FILEIO_ENOTDIR;
+ case ERROR_FILENAME_EXCED_RANGE:
+ case ERROR_INVALID_DATA:
+ case ERROR_INVALID_PARAMETER:
+ case ERROR_NEGATIVE_SEEK:
+ return FILEIO_EINVAL;
+ case ERROR_TOO_MANY_OPEN_FILES:
+ return FILEIO_EMFILE;
+ case ERROR_HANDLE_DISK_FULL:
+ case ERROR_DISK_FULL:
+ return FILEIO_ENOSPC;
+ case ERROR_WRITE_PROTECT:
+ return FILEIO_EROFS;
+ case ERROR_NOT_SUPPORTED:
+ return FILEIO_ENOSYS;
+ }
+
+ return FILEIO_EUNKNOWN;
}
-static const char *
-win32_arch_string (void)
+static void
+wince_hostio_last_error (char *buf)
{
- return the_low_target.arch_string;
+ DWORD winerr = GetLastError ();
+ int fileio_err = win32_error_to_fileio_error (winerr);
+ sprintf (buf, "F-1,%x", fileio_err);
}
+#endif
static struct target_ops win32_target_ops = {
win32_create_inferior,
NULL,
NULL,
NULL,
- win32_arch_string
+ NULL,
+#ifdef _WIN32_WCE
+ wince_hostio_last_error,
+#else
+ hostio_last_error_from_errno,
+#endif
};
/* Initialize the Win32 backend. */
if (the_low_target.breakpoint != NULL)
set_breakpoint_data (the_low_target.breakpoint,
the_low_target.breakpoint_len);
- init_registers ();
+ the_low_target.arch_setup ();
}
projects / deliverable / binutils-gdb.git / blobdiff