1 /* Low level interface to Windows debugging, for gdbserver.
2 Copyright (C) 2006-2020 Free Software Foundation, Inc.
4 Contributed by Leo Zayas. Based on "win32-nat.c" from GDB.
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>. */
23 #include "gdb/fileio.h"
24 #include "mem-break.h"
25 #include "win32-low.h"
26 #include "gdbthread.h"
35 #include "gdbsupport/gdb_tilde_expand.h"
36 #include "gdbsupport/common-inferior.h"
37 #include "gdbsupport/gdb_wait.h"
39 using namespace windows_nat
;
42 #include <sys/cygwin.h>
45 #define OUTMSG(X) do { printf X; fflush (stderr); } while (0)
58 #define _T(x) TEXT (x)
62 #define COUNTOF(STR) (sizeof (STR) / sizeof ((STR)[0]))
66 # define GETPROCADDRESS(DLL, PROC) \
67 ((winapi_ ## PROC) GetProcAddress (DLL, TEXT (#PROC)))
69 # define GETPROCADDRESS(DLL, PROC) \
70 ((winapi_ ## PROC) GetProcAddress (DLL, #PROC))
73 int using_threads
= 1;
76 static int attaching
= 0;
78 /* A status that hasn't been reported to the core yet, and so
79 win32_wait should return it next, instead of fetching the next
80 debug event off the win32 API. */
81 static struct target_waitstatus cached_status
;
83 /* Non zero if an interrupt request is to be satisfied by suspending
85 static int soft_interrupt_requested
= 0;
87 /* Non zero if the inferior is stopped in a simulated breakpoint done
88 by suspending all the threads. */
89 static int faked_breakpoint
= 0;
91 const struct target_desc
*win32_tdesc
;
93 #define NUM_REGS (the_low_target.num_regs)
95 typedef BOOL (WINAPI
*winapi_DebugActiveProcessStop
) (DWORD dwProcessId
);
96 typedef BOOL (WINAPI
*winapi_DebugSetProcessKillOnExit
) (BOOL KillOnExit
);
97 typedef BOOL (WINAPI
*winapi_DebugBreakProcess
) (HANDLE
);
98 typedef BOOL (WINAPI
*winapi_GenerateConsoleCtrlEvent
) (DWORD
, DWORD
);
101 static void win32_add_all_dlls (void);
104 /* Get the thread ID from the current selected inferior (the current
107 current_thread_ptid (void)
112 /* The current debug event from WaitForDebugEvent. */
114 debug_event_ptid (DEBUG_EVENT
*event
)
116 return ptid_t (event
->dwProcessId
, event
->dwThreadId
, 0);
119 /* Get the thread context of the thread associated with TH. */
122 win32_get_thread_context (windows_thread_info
*th
)
124 memset (&th
->context
, 0, sizeof (CONTEXT
));
125 (*the_low_target
.get_thread_context
) (th
);
127 memcpy (&th
->base_context
, &th
->context
, sizeof (CONTEXT
));
131 /* Set the thread context of the thread associated with TH. */
134 win32_set_thread_context (windows_thread_info
*th
)
137 /* Calling SuspendThread on a thread that is running kernel code
138 will report that the suspending was successful, but in fact, that
139 will often not be true. In those cases, the context returned by
140 GetThreadContext will not be correct by the time the thread
141 stops, hence we can't set that context back into the thread when
142 resuming - it will most likely crash the inferior.
143 Unfortunately, there is no way to know when the thread will
144 really stop. To work around it, we'll only write the context
145 back to the thread when either the user or GDB explicitly change
146 it between stopping and resuming. */
147 if (memcmp (&th
->context
, &th
->base_context
, sizeof (CONTEXT
)) != 0)
149 SetThreadContext (th
->h
, &th
->context
);
152 /* Set the thread context of the thread associated with TH. */
155 win32_prepare_to_resume (windows_thread_info
*th
)
157 if (the_low_target
.prepare_to_resume
!= NULL
)
158 (*the_low_target
.prepare_to_resume
) (th
);
161 /* See win32-low.h. */
164 win32_require_context (windows_thread_info
*th
)
166 if (th
->context
.ContextFlags
== 0)
169 win32_get_thread_context (th
);
173 /* See nat/windows-nat.h. */
175 windows_thread_info
*
176 windows_nat::thread_rec (ptid_t ptid
, thread_disposition_type disposition
)
178 thread_info
*thread
= find_thread_ptid (ptid
);
182 windows_thread_info
*th
= (windows_thread_info
*) thread_target_data (thread
);
183 if (disposition
!= DONT_INVALIDATE_CONTEXT
)
184 win32_require_context (th
);
188 /* Add a thread to the thread list. */
189 static windows_thread_info
*
190 child_add_thread (DWORD pid
, DWORD tid
, HANDLE h
, void *tlb
)
192 windows_thread_info
*th
;
193 ptid_t ptid
= ptid_t (pid
, tid
, 0);
195 if ((th
= thread_rec (ptid
, DONT_INVALIDATE_CONTEXT
)))
198 th
= new windows_thread_info (tid
, h
, (CORE_ADDR
) (uintptr_t) tlb
);
200 add_thread (ptid
, th
);
202 if (the_low_target
.thread_added
!= NULL
)
203 (*the_low_target
.thread_added
) (th
);
208 /* Delete a thread from the list of threads. */
210 delete_thread_info (thread_info
*thread
)
212 windows_thread_info
*th
= (windows_thread_info
*) thread_target_data (thread
);
214 remove_thread (thread
);
218 /* Delete a thread from the list of threads. */
220 child_delete_thread (DWORD pid
, DWORD tid
)
222 /* If the last thread is exiting, just return. */
223 if (all_threads
.size () == 1)
226 thread_info
*thread
= find_thread_ptid (ptid_t (pid
, tid
));
230 delete_thread_info (thread
);
233 /* These watchpoint related wrapper functions simply pass on the function call
234 if the low target has registered a corresponding function. */
237 win32_process_target::supports_z_point_type (char z_type
)
239 return (the_low_target
.supports_z_point_type
!= NULL
240 && the_low_target
.supports_z_point_type (z_type
));
244 win32_process_target::insert_point (enum raw_bkpt_type type
, CORE_ADDR addr
,
245 int size
, raw_breakpoint
*bp
)
247 if (the_low_target
.insert_point
!= NULL
)
248 return the_low_target
.insert_point (type
, addr
, size
, bp
);
250 /* Unsupported (see target.h). */
255 win32_process_target::remove_point (enum raw_bkpt_type type
, CORE_ADDR addr
,
256 int size
, raw_breakpoint
*bp
)
258 if (the_low_target
.remove_point
!= NULL
)
259 return the_low_target
.remove_point (type
, addr
, size
, bp
);
261 /* Unsupported (see target.h). */
266 win32_process_target::stopped_by_watchpoint ()
268 if (the_low_target
.stopped_by_watchpoint
!= NULL
)
269 return the_low_target
.stopped_by_watchpoint ();
275 win32_process_target::stopped_data_address ()
277 if (the_low_target
.stopped_data_address
!= NULL
)
278 return the_low_target
.stopped_data_address ();
284 /* Transfer memory from/to the debugged process. */
286 child_xfer_memory (CORE_ADDR memaddr
, char *our
, int len
,
287 int write
, process_stratum_target
*target
)
292 uintptr_t addr
= (uintptr_t) memaddr
;
296 success
= WriteProcessMemory (current_process_handle
, (LPVOID
) addr
,
297 (LPCVOID
) our
, len
, &done
);
299 lasterror
= GetLastError ();
300 FlushInstructionCache (current_process_handle
, (LPCVOID
) addr
, len
);
304 success
= ReadProcessMemory (current_process_handle
, (LPCVOID
) addr
,
305 (LPVOID
) our
, len
, &done
);
307 lasterror
= GetLastError ();
309 if (!success
&& lasterror
== ERROR_PARTIAL_COPY
&& done
> 0)
312 return success
? done
: -1;
315 /* Clear out any old thread list and reinitialize it to a pristine
318 child_init_thread_list (void)
320 for_each_thread (delete_thread_info
);
323 /* Zero during the child initialization phase, and nonzero otherwise. */
325 static int child_initialization_done
= 0;
328 do_initial_child_stuff (HANDLE proch
, DWORD pid
, int attached
)
330 struct process_info
*proc
;
332 last_sig
= GDB_SIGNAL_0
;
334 current_process_handle
= proch
;
335 current_process_id
= pid
;
338 soft_interrupt_requested
= 0;
339 faked_breakpoint
= 0;
341 memset (¤t_event
, 0, sizeof (current_event
));
343 proc
= add_process (pid
, attached
);
344 proc
->tdesc
= win32_tdesc
;
345 child_init_thread_list ();
346 child_initialization_done
= 0;
348 if (the_low_target
.initial_stuff
!= NULL
)
349 (*the_low_target
.initial_stuff
) ();
351 cached_status
.kind
= TARGET_WAITKIND_IGNORE
;
353 /* Flush all currently pending debug events (thread and dll list) up
354 to the initial breakpoint. */
357 struct target_waitstatus status
;
359 the_target
->wait (minus_one_ptid
, &status
, 0);
361 /* Note win32_wait doesn't return thread events. */
362 if (status
.kind
!= TARGET_WAITKIND_LOADED
)
364 cached_status
= status
;
369 struct thread_resume resume
;
371 resume
.thread
= minus_one_ptid
;
372 resume
.kind
= resume_continue
;
375 the_target
->resume (&resume
, 1);
380 /* Now that the inferior has been started and all DLLs have been mapped,
381 we can iterate over all DLLs and load them in.
383 We avoid doing it any earlier because, on certain versions of Windows,
384 LOAD_DLL_DEBUG_EVENTs are sometimes not complete. In particular,
385 we have seen on Windows 8.1 that the ntdll.dll load event does not
386 include the DLL name, preventing us from creating an associated SO.
387 A possible explanation is that ntdll.dll might be mapped before
388 the SO info gets created by the Windows system -- ntdll.dll is
389 the first DLL to be reported via LOAD_DLL_DEBUG_EVENT and other DLLs
390 do not seem to suffer from that problem.
392 Rather than try to work around this sort of issue, it is much
393 simpler to just ignore DLL load/unload events during the startup
394 phase, and then process them all in one batch now. */
395 win32_add_all_dlls ();
398 child_initialization_done
= 1;
401 /* Resume all artificially suspended threads if we are continuing
404 continue_one_thread (thread_info
*thread
, int thread_id
)
406 windows_thread_info
*th
= (windows_thread_info
*) thread_target_data (thread
);
408 if (thread_id
== -1 || thread_id
== th
->tid
)
410 win32_prepare_to_resume (th
);
414 if (th
->context
.ContextFlags
)
416 win32_set_thread_context (th
);
417 th
->context
.ContextFlags
= 0;
426 child_continue (DWORD continue_status
, int thread_id
)
428 /* The inferior will only continue after the ContinueDebugEvent
430 for_each_thread ([&] (thread_info
*thread
)
432 continue_one_thread (thread
, thread_id
);
434 faked_breakpoint
= 0;
436 if (!ContinueDebugEvent (current_event
.dwProcessId
,
437 current_event
.dwThreadId
,
444 /* Fetch register(s) from the current thread context. */
446 child_fetch_inferior_registers (struct regcache
*regcache
, int r
)
449 windows_thread_info
*th
= thread_rec (current_thread_ptid (),
451 if (r
== -1 || r
> NUM_REGS
)
452 child_fetch_inferior_registers (regcache
, NUM_REGS
);
454 for (regno
= 0; regno
< r
; regno
++)
455 (*the_low_target
.fetch_inferior_register
) (regcache
, th
, regno
);
458 /* Store a new register value into the current thread context. We don't
459 change the program's context until later, when we resume it. */
461 child_store_inferior_registers (struct regcache
*regcache
, int r
)
464 windows_thread_info
*th
= thread_rec (current_thread_ptid (),
466 if (r
== -1 || r
== 0 || r
> NUM_REGS
)
467 child_store_inferior_registers (regcache
, NUM_REGS
);
469 for (regno
= 0; regno
< r
; regno
++)
470 (*the_low_target
.store_inferior_register
) (regcache
, th
, regno
);
473 /* Map the Windows error number in ERROR to a locale-dependent error
474 message string and return a pointer to it. Typically, the values
475 for ERROR come from GetLastError.
477 The string pointed to shall not be modified by the application,
478 but may be overwritten by a subsequent call to strwinerror
480 The strwinerror function does not change the current setting
484 strwinerror (DWORD error
)
486 static char buf
[1024];
488 DWORD lasterr
= GetLastError ();
489 DWORD chars
= FormatMessage (FORMAT_MESSAGE_FROM_SYSTEM
490 | FORMAT_MESSAGE_ALLOCATE_BUFFER
,
493 0, /* Default language */
499 /* If there is an \r\n appended, zap it. */
501 && msgbuf
[chars
- 2] == '\r'
502 && msgbuf
[chars
- 1] == '\n')
508 if (chars
> ((COUNTOF (buf
)) - 1))
510 chars
= COUNTOF (buf
) - 1;
515 wcstombs (buf
, msgbuf
, chars
+ 1);
517 strncpy (buf
, msgbuf
, chars
+ 1);
522 sprintf (buf
, "unknown win32 error (%u)", (unsigned) error
);
524 SetLastError (lasterr
);
529 create_process (const char *program
, char *args
,
530 DWORD flags
, PROCESS_INFORMATION
*pi
)
532 const char *inferior_cwd
= get_inferior_cwd ();
534 size_t argslen
, proglen
;
536 proglen
= strlen (program
) + 1;
537 argslen
= strlen (args
) + proglen
;
540 wchar_t *p
, *wprogram
, *wargs
, *wcwd
= NULL
;
542 wprogram
= (wchar_t *) alloca (proglen
* sizeof (wchar_t));
543 mbstowcs (wprogram
, program
, proglen
);
545 for (p
= wprogram
; *p
; ++p
)
549 wargs
= alloca ((argslen
+ 1) * sizeof (wchar_t));
550 wcscpy (wargs
, wprogram
);
551 wcscat (wargs
, L
" ");
552 mbstowcs (wargs
+ proglen
, args
, argslen
+ 1 - proglen
);
554 if (inferior_cwd
!= NULL
)
556 std::string expanded_infcwd
= gdb_tilde_expand (inferior_cwd
);
557 std::replace (expanded_infcwd
.begin (), expanded_infcwd
.end (),
559 wcwd
= alloca ((expanded_infcwd
.size () + 1) * sizeof (wchar_t));
560 if (mbstowcs (wcwd
, expanded_infcwd
.c_str (),
561 expanded_infcwd
.size () + 1) == NULL
)
564 Could not convert the expanded inferior cwd to wide-char."));
568 ret
= CreateProcessW (wprogram
, /* image name */
569 wargs
, /* command line */
570 NULL
, /* security, not supported */
571 NULL
, /* thread, not supported */
572 FALSE
, /* inherit handles, not supported */
573 flags
, /* start flags */
574 NULL
, /* environment, not supported */
575 wcwd
, /* current directory */
576 NULL
, /* start info, not supported */
579 STARTUPINFOA si
= { sizeof (STARTUPINFOA
) };
580 char *program_and_args
= (char *) alloca (argslen
+ 1);
582 strcpy (program_and_args
, program
);
583 strcat (program_and_args
, " ");
584 strcat (program_and_args
, args
);
585 ret
= CreateProcessA (program
, /* image name */
586 program_and_args
, /* command line */
589 TRUE
, /* inherit handles */
590 flags
, /* start flags */
591 NULL
, /* environment */
592 /* current directory */
593 (inferior_cwd
== NULL
595 : gdb_tilde_expand (inferior_cwd
).c_str()),
596 &si
, /* start info */
603 /* Start a new process.
604 PROGRAM is the program name.
605 PROGRAM_ARGS is the vector containing the inferior's args.
606 Returns the new PID on success, -1 on failure. Registers the new
607 process with the process list. */
609 win32_process_target::create_inferior (const char *program
,
610 const std::vector
<char *> &program_args
)
612 client_state
&cs
= get_client_state ();
614 char real_path
[PATH_MAX
];
615 char *orig_path
, *new_path
, *path_ptr
;
619 PROCESS_INFORMATION pi
;
621 std::string str_program_args
= stringify_argv (program_args
);
622 char *args
= (char *) str_program_args
.c_str ();
624 /* win32_wait needs to know we're not attaching. */
628 error ("No executable specified, specify executable to debug.\n");
630 flags
= DEBUG_PROCESS
| DEBUG_ONLY_THIS_PROCESS
;
634 path_ptr
= getenv ("PATH");
637 int size
= cygwin_conv_path_list (CCP_POSIX_TO_WIN_A
, path_ptr
, NULL
, 0);
638 orig_path
= (char *) alloca (strlen (path_ptr
) + 1);
639 new_path
= (char *) alloca (size
);
640 strcpy (orig_path
, path_ptr
);
641 cygwin_conv_path_list (CCP_POSIX_TO_WIN_A
, path_ptr
, new_path
, size
);
642 setenv ("PATH", new_path
, 1);
644 cygwin_conv_path (CCP_POSIX_TO_WIN_A
, program
, real_path
, PATH_MAX
);
648 OUTMSG2 (("Command line is \"%s %s\"\n", program
, args
));
650 #ifdef CREATE_NEW_PROCESS_GROUP
651 flags
|= CREATE_NEW_PROCESS_GROUP
;
654 ret
= create_process (program
, args
, flags
, &pi
);
655 err
= GetLastError ();
656 if (!ret
&& err
== ERROR_FILE_NOT_FOUND
)
658 char *exename
= (char *) alloca (strlen (program
) + 5);
659 strcat (strcpy (exename
, program
), ".exe");
660 ret
= create_process (exename
, args
, flags
, &pi
);
661 err
= GetLastError ();
666 setenv ("PATH", orig_path
, 1);
671 error ("Error creating process \"%s %s\", (error %d): %s\n",
672 program
, args
, (int) err
, strwinerror (err
));
676 OUTMSG2 (("Process created: %s %s\n", program
, (char *) args
));
680 /* On Windows CE this handle can't be closed. The OS reuses
681 it in the debug events, while the 9x/NT versions of Windows
682 probably use a DuplicateHandle'd one. */
683 CloseHandle (pi
.hThread
);
686 do_initial_child_stuff (pi
.hProcess
, pi
.dwProcessId
, 0);
688 /* Wait till we are at 1st instruction in program, return new pid
689 (assuming success). */
690 cs
.last_ptid
= wait (ptid_t (current_process_id
), &cs
.last_status
, 0);
692 /* Necessary for handle_v_kill. */
693 signal_pid
= current_process_id
;
695 return current_process_id
;
698 /* Attach to a running process.
699 PID is the process ID to attach to, specified by the user
700 or a higher layer. */
702 win32_process_target::attach (unsigned long pid
)
705 winapi_DebugSetProcessKillOnExit DebugSetProcessKillOnExit
= NULL
;
708 HMODULE dll
= GetModuleHandle (_T("COREDLL.DLL"));
710 HMODULE dll
= GetModuleHandle (_T("KERNEL32.DLL"));
712 DebugSetProcessKillOnExit
= GETPROCADDRESS (dll
, DebugSetProcessKillOnExit
);
714 h
= OpenProcess (PROCESS_ALL_ACCESS
, FALSE
, pid
);
717 if (DebugActiveProcess (pid
))
719 if (DebugSetProcessKillOnExit
!= NULL
)
720 DebugSetProcessKillOnExit (FALSE
);
722 /* win32_wait needs to know we're attaching. */
724 do_initial_child_stuff (h
, pid
, 1);
731 err
= GetLastError ();
732 error ("Attach to process failed (error %d): %s\n",
733 (int) err
, strwinerror (err
));
736 /* See nat/windows-nat.h. */
739 windows_nat::handle_output_debug_string (struct target_waitstatus
*ourstatus
)
741 #define READ_BUFFER_LEN 1024
743 char s
[READ_BUFFER_LEN
+ 1] = { 0 };
744 DWORD nbytes
= current_event
.u
.DebugString
.nDebugStringLength
;
749 if (nbytes
> READ_BUFFER_LEN
)
750 nbytes
= READ_BUFFER_LEN
;
752 addr
= (CORE_ADDR
) (size_t) current_event
.u
.DebugString
.lpDebugStringData
;
754 if (current_event
.u
.DebugString
.fUnicode
)
756 /* The event tells us how many bytes, not chars, even
758 WCHAR buffer
[(READ_BUFFER_LEN
+ 1) / sizeof (WCHAR
)] = { 0 };
759 if (read_inferior_memory (addr
, (unsigned char *) buffer
, nbytes
) != 0)
761 wcstombs (s
, buffer
, (nbytes
+ 1) / sizeof (WCHAR
));
765 if (read_inferior_memory (addr
, (unsigned char *) s
, nbytes
) != 0)
769 if (!startswith (s
, "cYg"))
779 #undef READ_BUFFER_LEN
785 win32_clear_inferiors (void)
787 if (current_process_handle
!= NULL
)
788 CloseHandle (current_process_handle
);
790 for_each_thread (delete_thread_info
);
791 siginfo_er
.ExceptionCode
= 0;
795 /* Implementation of target_ops::kill. */
798 win32_process_target::kill (process_info
*process
)
800 TerminateProcess (current_process_handle
, 0);
803 if (!child_continue (DBG_CONTINUE
, -1))
805 if (!WaitForDebugEvent (¤t_event
, INFINITE
))
807 if (current_event
.dwDebugEventCode
== EXIT_PROCESS_DEBUG_EVENT
)
809 else if (current_event
.dwDebugEventCode
== OUTPUT_DEBUG_STRING_EVENT
)
810 handle_output_debug_string (nullptr);
813 win32_clear_inferiors ();
815 remove_process (process
);
819 /* Implementation of target_ops::detach. */
822 win32_process_target::detach (process_info
*process
)
824 winapi_DebugActiveProcessStop DebugActiveProcessStop
= NULL
;
825 winapi_DebugSetProcessKillOnExit DebugSetProcessKillOnExit
= NULL
;
827 HMODULE dll
= GetModuleHandle (_T("COREDLL.DLL"));
829 HMODULE dll
= GetModuleHandle (_T("KERNEL32.DLL"));
831 DebugActiveProcessStop
= GETPROCADDRESS (dll
, DebugActiveProcessStop
);
832 DebugSetProcessKillOnExit
= GETPROCADDRESS (dll
, DebugSetProcessKillOnExit
);
834 if (DebugSetProcessKillOnExit
== NULL
835 || DebugActiveProcessStop
== NULL
)
839 struct thread_resume resume
;
840 resume
.thread
= minus_one_ptid
;
841 resume
.kind
= resume_continue
;
843 this->resume (&resume
, 1);
846 if (!DebugActiveProcessStop (current_process_id
))
849 DebugSetProcessKillOnExit (FALSE
);
850 remove_process (process
);
852 win32_clear_inferiors ();
857 win32_process_target::mourn (struct process_info
*process
)
859 remove_process (process
);
862 /* Implementation of target_ops::join. */
865 win32_process_target::join (int pid
)
867 HANDLE h
= OpenProcess (PROCESS_ALL_ACCESS
, FALSE
, pid
);
870 WaitForSingleObject (h
, INFINITE
);
875 /* Return true iff the thread with thread ID TID is alive. */
877 win32_process_target::thread_alive (ptid_t ptid
)
879 /* Our thread list is reliable; don't bother to poll target
881 return find_thread_ptid (ptid
) != NULL
;
884 /* Resume the inferior process. RESUME_INFO describes how we want
887 win32_process_target::resume (thread_resume
*resume_info
, size_t n
)
892 windows_thread_info
*th
;
893 DWORD continue_status
= DBG_CONTINUE
;
896 /* This handles the very limited set of resume packets that GDB can
897 currently produce. */
899 if (n
== 1 && resume_info
[0].thread
== minus_one_ptid
)
904 /* Yes, we're ignoring resume_info[0].thread. It'd be tricky to make
905 the Windows resume code do the right thing for thread switching. */
906 tid
= current_event
.dwThreadId
;
908 if (resume_info
[0].thread
!= minus_one_ptid
)
910 sig
= gdb_signal_from_host (resume_info
[0].sig
);
911 step
= resume_info
[0].kind
== resume_step
;
919 if (sig
!= GDB_SIGNAL_0
)
921 if (current_event
.dwDebugEventCode
!= EXCEPTION_DEBUG_EVENT
)
923 OUTMSG (("Cannot continue with signal %s here.\n",
924 gdb_signal_to_string (sig
)));
926 else if (sig
== last_sig
)
927 continue_status
= DBG_EXCEPTION_NOT_HANDLED
;
929 OUTMSG (("Can only continue with received signal %s.\n",
930 gdb_signal_to_string (last_sig
)));
933 last_sig
= GDB_SIGNAL_0
;
935 /* Get context for the currently selected thread. */
936 ptid
= debug_event_ptid (¤t_event
);
937 th
= thread_rec (ptid
, DONT_INVALIDATE_CONTEXT
);
940 win32_prepare_to_resume (th
);
942 if (th
->context
.ContextFlags
)
944 /* Move register values from the inferior into the thread
945 context structure. */
946 regcache_invalidate ();
950 if (the_low_target
.single_step
!= NULL
)
951 (*the_low_target
.single_step
) (th
);
953 error ("Single stepping is not supported "
954 "in this configuration.\n");
957 win32_set_thread_context (th
);
958 th
->context
.ContextFlags
= 0;
962 /* Allow continuing with the same signal that interrupted us.
963 Otherwise complain. */
965 child_continue (continue_status
, tid
);
969 win32_add_one_solib (const char *name
, CORE_ADDR load_addr
)
971 char buf
[MAX_PATH
+ 1];
972 char buf2
[MAX_PATH
+ 1];
975 WIN32_FIND_DATA w32_fd
;
976 WCHAR wname
[MAX_PATH
+ 1];
977 mbstowcs (wname
, name
, MAX_PATH
);
978 HANDLE h
= FindFirstFile (wname
, &w32_fd
);
980 WIN32_FIND_DATAA w32_fd
;
981 HANDLE h
= FindFirstFileA (name
, &w32_fd
);
984 /* The symbols in a dll are offset by 0x1000, which is the
985 offset from 0 of the first byte in an image - because
986 of the file header and the section alignment. */
989 if (h
== INVALID_HANDLE_VALUE
)
997 char cwd
[MAX_PATH
+ 1];
999 if (GetCurrentDirectoryA (MAX_PATH
+ 1, cwd
))
1001 p
= strrchr (buf
, '\\');
1004 SetCurrentDirectoryA (buf
);
1005 GetFullPathNameA (w32_fd
.cFileName
, MAX_PATH
, buf
, &p
);
1006 SetCurrentDirectoryA (cwd
);
1013 if (strcasecmp (buf
, "ntdll.dll") == 0)
1015 GetSystemDirectoryA (buf
, sizeof (buf
));
1016 strcat (buf
, "\\ntdll.dll");
1021 cygwin_conv_path (CCP_WIN_A_TO_POSIX
, buf
, buf2
, sizeof (buf2
));
1026 loaded_dll (buf2
, load_addr
);
1029 typedef BOOL (WINAPI
*winapi_EnumProcessModules
) (HANDLE
, HMODULE
*,
1031 typedef BOOL (WINAPI
*winapi_GetModuleInformation
) (HANDLE
, HMODULE
,
1032 LPMODULEINFO
, DWORD
);
1033 typedef DWORD (WINAPI
*winapi_GetModuleFileNameExA
) (HANDLE
, HMODULE
,
1036 static winapi_EnumProcessModules win32_EnumProcessModules
;
1037 static winapi_GetModuleInformation win32_GetModuleInformation
;
1038 static winapi_GetModuleFileNameExA win32_GetModuleFileNameExA
;
1043 static int psapi_loaded
= 0;
1044 static HMODULE dll
= NULL
;
1049 dll
= LoadLibrary (TEXT("psapi.dll"));
1052 win32_EnumProcessModules
=
1053 GETPROCADDRESS (dll
, EnumProcessModules
);
1054 win32_GetModuleInformation
=
1055 GETPROCADDRESS (dll
, GetModuleInformation
);
1056 win32_GetModuleFileNameExA
=
1057 GETPROCADDRESS (dll
, GetModuleFileNameExA
);
1060 return (win32_EnumProcessModules
!= NULL
1061 && win32_GetModuleInformation
!= NULL
1062 && win32_GetModuleFileNameExA
!= NULL
);
1067 /* Iterate over all DLLs currently mapped by our inferior, and
1068 add them to our list of solibs. */
1071 win32_add_all_dlls (void)
1075 HMODULE
*DllHandle
= dh_buf
;
1083 ok
= (*win32_EnumProcessModules
) (current_process_handle
,
1088 if (!ok
|| !cbNeeded
)
1091 DllHandle
= (HMODULE
*) alloca (cbNeeded
);
1095 ok
= (*win32_EnumProcessModules
) (current_process_handle
,
1102 for (i
= 1; i
< ((size_t) cbNeeded
/ sizeof (HMODULE
)); i
++)
1105 char dll_name
[MAX_PATH
];
1107 if (!(*win32_GetModuleInformation
) (current_process_handle
,
1112 if ((*win32_GetModuleFileNameExA
) (current_process_handle
,
1117 win32_add_one_solib (dll_name
, (CORE_ADDR
) (uintptr_t) mi
.lpBaseOfDll
);
1122 typedef HANDLE (WINAPI
*winapi_CreateToolhelp32Snapshot
) (DWORD
, DWORD
);
1123 typedef BOOL (WINAPI
*winapi_Module32First
) (HANDLE
, LPMODULEENTRY32
);
1124 typedef BOOL (WINAPI
*winapi_Module32Next
) (HANDLE
, LPMODULEENTRY32
);
1126 /* See nat/windows-nat.h. */
1129 windows_nat::handle_load_dll ()
1131 LOAD_DLL_DEBUG_INFO
*event
= ¤t_event
.u
.LoadDll
;
1132 const char *dll_name
;
1134 dll_name
= get_image_name (current_process_handle
,
1135 event
->lpImageName
, event
->fUnicode
);
1139 win32_add_one_solib (dll_name
, (CORE_ADDR
) (uintptr_t) event
->lpBaseOfDll
);
1142 /* See nat/windows-nat.h. */
1145 windows_nat::handle_unload_dll ()
1147 CORE_ADDR load_addr
=
1148 (CORE_ADDR
) (uintptr_t) current_event
.u
.UnloadDll
.lpBaseOfDll
;
1150 /* The symbols in a dll are offset by 0x1000, which is the
1151 offset from 0 of the first byte in an image - because
1152 of the file header and the section alignment. */
1153 load_addr
+= 0x1000;
1154 unloaded_dll (NULL
, load_addr
);
1158 suspend_one_thread (thread_info
*thread
)
1160 windows_thread_info
*th
= (windows_thread_info
*) thread_target_data (thread
);
1166 fake_breakpoint_event (void)
1168 OUTMSG2(("fake_breakpoint_event\n"));
1170 faked_breakpoint
= 1;
1172 memset (¤t_event
, 0, sizeof (current_event
));
1173 current_event
.dwThreadId
= main_thread_id
;
1174 current_event
.dwDebugEventCode
= EXCEPTION_DEBUG_EVENT
;
1175 current_event
.u
.Exception
.ExceptionRecord
.ExceptionCode
1176 = EXCEPTION_BREAKPOINT
;
1178 for_each_thread (suspend_one_thread
);
1183 auto_delete_breakpoint (CORE_ADDR stop_pc
)
1189 /* See nat/windows-nat.h. */
1192 windows_nat::handle_ms_vc_exception (const EXCEPTION_RECORD
*rec
)
1197 /* Get the next event from the child. */
1200 get_child_debug_event (DWORD
*continue_status
,
1201 struct target_waitstatus
*ourstatus
)
1205 last_sig
= GDB_SIGNAL_0
;
1206 ourstatus
->kind
= TARGET_WAITKIND_SPURIOUS
;
1207 *continue_status
= DBG_CONTINUE
;
1209 /* Check if GDB sent us an interrupt request. */
1210 check_remote_input_interrupt_request ();
1212 if (soft_interrupt_requested
)
1214 soft_interrupt_requested
= 0;
1215 fake_breakpoint_event ();
1224 /* WinCE doesn't set an initial breakpoint automatically. To
1225 stop the inferior, we flush all currently pending debug
1226 events -- the thread list and the dll list are always
1227 reported immediatelly without delay, then, we suspend all
1228 threads and pretend we saw a trap at the current PC of the
1231 Contrary to desktop Windows, Windows CE *does* report the dll
1232 names on LOAD_DLL_DEBUG_EVENTs resulting from a
1233 DebugActiveProcess call. This limits the way we can detect
1234 if all the dlls have already been reported. If we get a real
1235 debug event before leaving attaching, the worst that will
1236 happen is the user will see a spurious breakpoint. */
1238 current_event
.dwDebugEventCode
= 0;
1239 if (!WaitForDebugEvent (¤t_event
, 0))
1241 OUTMSG2(("no attach events left\n"));
1242 fake_breakpoint_event ();
1246 OUTMSG2(("got attach event\n"));
1251 /* Keep the wait time low enough for comfortable remote
1252 interruption, but high enough so gdbserver doesn't become a
1254 if (!WaitForDebugEvent (¤t_event
, 250))
1256 DWORD e
= GetLastError();
1258 if (e
== ERROR_PIPE_NOT_CONNECTED
)
1260 /* This will happen if the loader fails to succesfully
1261 load the application, e.g., if the main executable
1262 tries to pull in a non-existing export from a
1264 ourstatus
->kind
= TARGET_WAITKIND_EXITED
;
1265 ourstatus
->value
.integer
= 1;
1275 switch (current_event
.dwDebugEventCode
)
1277 case CREATE_THREAD_DEBUG_EVENT
:
1278 OUTMSG2 (("gdbserver: kernel event CREATE_THREAD_DEBUG_EVENT "
1279 "for pid=%u tid=%x)\n",
1280 (unsigned) current_event
.dwProcessId
,
1281 (unsigned) current_event
.dwThreadId
));
1283 /* Record the existence of this thread. */
1284 child_add_thread (current_event
.dwProcessId
,
1285 current_event
.dwThreadId
,
1286 current_event
.u
.CreateThread
.hThread
,
1287 current_event
.u
.CreateThread
.lpThreadLocalBase
);
1290 case EXIT_THREAD_DEBUG_EVENT
:
1291 OUTMSG2 (("gdbserver: kernel event EXIT_THREAD_DEBUG_EVENT "
1292 "for pid=%u tid=%x\n",
1293 (unsigned) current_event
.dwProcessId
,
1294 (unsigned) current_event
.dwThreadId
));
1295 child_delete_thread (current_event
.dwProcessId
,
1296 current_event
.dwThreadId
);
1298 current_thread
= get_first_thread ();
1301 case CREATE_PROCESS_DEBUG_EVENT
:
1302 OUTMSG2 (("gdbserver: kernel event CREATE_PROCESS_DEBUG_EVENT "
1303 "for pid=%u tid=%x\n",
1304 (unsigned) current_event
.dwProcessId
,
1305 (unsigned) current_event
.dwThreadId
));
1306 CloseHandle (current_event
.u
.CreateProcessInfo
.hFile
);
1308 current_process_handle
= current_event
.u
.CreateProcessInfo
.hProcess
;
1309 main_thread_id
= current_event
.dwThreadId
;
1311 /* Add the main thread. */
1312 child_add_thread (current_event
.dwProcessId
,
1314 current_event
.u
.CreateProcessInfo
.hThread
,
1315 current_event
.u
.CreateProcessInfo
.lpThreadLocalBase
);
1320 /* Windows CE doesn't set the initial breakpoint
1321 automatically like the desktop versions of Windows do.
1322 We add it explicitly here. It will be removed as soon as
1324 set_breakpoint_at ((CORE_ADDR
) (long) current_event
.u
1325 .CreateProcessInfo
.lpStartAddress
,
1326 auto_delete_breakpoint
);
1331 case EXIT_PROCESS_DEBUG_EVENT
:
1332 OUTMSG2 (("gdbserver: kernel event EXIT_PROCESS_DEBUG_EVENT "
1333 "for pid=%u tid=%x\n",
1334 (unsigned) current_event
.dwProcessId
,
1335 (unsigned) current_event
.dwThreadId
));
1337 DWORD exit_status
= current_event
.u
.ExitProcess
.dwExitCode
;
1338 /* If the exit status looks like a fatal exception, but we
1339 don't recognize the exception's code, make the original
1340 exit status value available, to avoid losing information. */
1342 = WIFSIGNALED (exit_status
) ? WTERMSIG (exit_status
) : -1;
1343 if (exit_signal
== -1)
1345 ourstatus
->kind
= TARGET_WAITKIND_EXITED
;
1346 ourstatus
->value
.integer
= exit_status
;
1350 ourstatus
->kind
= TARGET_WAITKIND_SIGNALLED
;
1351 ourstatus
->value
.sig
= gdb_signal_from_host (exit_signal
);
1354 child_continue (DBG_CONTINUE
, -1);
1355 CloseHandle (current_process_handle
);
1356 current_process_handle
= NULL
;
1359 case LOAD_DLL_DEBUG_EVENT
:
1360 OUTMSG2 (("gdbserver: kernel event LOAD_DLL_DEBUG_EVENT "
1361 "for pid=%u tid=%x\n",
1362 (unsigned) current_event
.dwProcessId
,
1363 (unsigned) current_event
.dwThreadId
));
1364 CloseHandle (current_event
.u
.LoadDll
.hFile
);
1365 if (! child_initialization_done
)
1369 ourstatus
->kind
= TARGET_WAITKIND_LOADED
;
1370 ourstatus
->value
.sig
= GDB_SIGNAL_TRAP
;
1373 case UNLOAD_DLL_DEBUG_EVENT
:
1374 OUTMSG2 (("gdbserver: kernel event UNLOAD_DLL_DEBUG_EVENT "
1375 "for pid=%u tid=%x\n",
1376 (unsigned) current_event
.dwProcessId
,
1377 (unsigned) current_event
.dwThreadId
));
1378 if (! child_initialization_done
)
1380 handle_unload_dll ();
1381 ourstatus
->kind
= TARGET_WAITKIND_LOADED
;
1382 ourstatus
->value
.sig
= GDB_SIGNAL_TRAP
;
1385 case EXCEPTION_DEBUG_EVENT
:
1386 OUTMSG2 (("gdbserver: kernel event EXCEPTION_DEBUG_EVENT "
1387 "for pid=%u tid=%x\n",
1388 (unsigned) current_event
.dwProcessId
,
1389 (unsigned) current_event
.dwThreadId
));
1390 if (handle_exception (ourstatus
, debug_threads
)
1391 == HANDLE_EXCEPTION_UNHANDLED
)
1392 *continue_status
= DBG_EXCEPTION_NOT_HANDLED
;
1395 case OUTPUT_DEBUG_STRING_EVENT
:
1396 /* A message from the kernel (or Cygwin). */
1397 OUTMSG2 (("gdbserver: kernel event OUTPUT_DEBUG_STRING_EVENT "
1398 "for pid=%u tid=%x\n",
1399 (unsigned) current_event
.dwProcessId
,
1400 (unsigned) current_event
.dwThreadId
));
1401 handle_output_debug_string (nullptr);
1405 OUTMSG2 (("gdbserver: kernel event unknown "
1406 "for pid=%u tid=%x code=%x\n",
1407 (unsigned) current_event
.dwProcessId
,
1408 (unsigned) current_event
.dwThreadId
,
1409 (unsigned) current_event
.dwDebugEventCode
));
1413 ptid
= debug_event_ptid (¤t_event
);
1414 current_thread
= find_thread_ptid (ptid
);
1418 /* Wait for the inferior process to change state.
1419 STATUS will be filled in with a response code to send to GDB.
1420 Returns the signal which caused the process to stop. */
1422 win32_process_target::wait (ptid_t ptid
, target_waitstatus
*ourstatus
,
1425 struct regcache
*regcache
;
1427 if (cached_status
.kind
!= TARGET_WAITKIND_IGNORE
)
1429 /* The core always does a wait after creating the inferior, and
1430 do_initial_child_stuff already ran the inferior to the
1431 initial breakpoint (or an exit, if creating the process
1432 fails). Report it now. */
1433 *ourstatus
= cached_status
;
1434 cached_status
.kind
= TARGET_WAITKIND_IGNORE
;
1435 return debug_event_ptid (¤t_event
);
1440 DWORD continue_status
;
1441 if (!get_child_debug_event (&continue_status
, ourstatus
))
1444 switch (ourstatus
->kind
)
1446 case TARGET_WAITKIND_EXITED
:
1447 OUTMSG2 (("Child exited with retcode = %x\n",
1448 ourstatus
->value
.integer
));
1449 win32_clear_inferiors ();
1450 return ptid_t (current_event
.dwProcessId
);
1451 case TARGET_WAITKIND_STOPPED
:
1452 case TARGET_WAITKIND_SIGNALLED
:
1453 case TARGET_WAITKIND_LOADED
:
1454 OUTMSG2 (("Child Stopped with signal = %d \n",
1455 ourstatus
->value
.sig
));
1457 regcache
= get_thread_regcache (current_thread
, 1);
1458 child_fetch_inferior_registers (regcache
, -1);
1459 return debug_event_ptid (¤t_event
);
1461 OUTMSG (("Ignoring unknown internal event, %d\n", ourstatus
->kind
));
1463 case TARGET_WAITKIND_SPURIOUS
:
1464 /* do nothing, just continue */
1465 child_continue (continue_status
, -1);
1471 /* Fetch registers from the inferior process.
1472 If REGNO is -1, fetch all registers; otherwise, fetch at least REGNO. */
1474 win32_process_target::fetch_registers (regcache
*regcache
, int regno
)
1476 child_fetch_inferior_registers (regcache
, regno
);
1479 /* Store registers to the inferior process.
1480 If REGNO is -1, store all registers; otherwise, store at least REGNO. */
1482 win32_process_target::store_registers (regcache
*regcache
, int regno
)
1484 child_store_inferior_registers (regcache
, regno
);
1487 /* Read memory from the inferior process. This should generally be
1488 called through read_inferior_memory, which handles breakpoint shadowing.
1489 Read LEN bytes at MEMADDR into a buffer at MYADDR. */
1491 win32_process_target::read_memory (CORE_ADDR memaddr
, unsigned char *myaddr
,
1494 return child_xfer_memory (memaddr
, (char *) myaddr
, len
, 0, 0) != len
;
1497 /* Write memory to the inferior process. This should generally be
1498 called through write_inferior_memory, which handles breakpoint shadowing.
1499 Write LEN bytes from the buffer at MYADDR to MEMADDR.
1500 Returns 0 on success and errno on failure. */
1502 win32_process_target::write_memory (CORE_ADDR memaddr
,
1503 const unsigned char *myaddr
, int len
)
1505 return child_xfer_memory (memaddr
, (char *) myaddr
, len
, 1, 0) != len
;
1508 /* Send an interrupt request to the inferior process. */
1510 win32_process_target::request_interrupt ()
1512 winapi_DebugBreakProcess DebugBreakProcess
;
1513 winapi_GenerateConsoleCtrlEvent GenerateConsoleCtrlEvent
;
1516 HMODULE dll
= GetModuleHandle (_T("COREDLL.DLL"));
1518 HMODULE dll
= GetModuleHandle (_T("KERNEL32.DLL"));
1521 GenerateConsoleCtrlEvent
= GETPROCADDRESS (dll
, GenerateConsoleCtrlEvent
);
1523 if (GenerateConsoleCtrlEvent
!= NULL
1524 && GenerateConsoleCtrlEvent (CTRL_BREAK_EVENT
, current_process_id
))
1527 /* GenerateConsoleCtrlEvent can fail if process id being debugged is
1528 not a process group id.
1529 Fallback to XP/Vista 'DebugBreakProcess', which generates a
1530 breakpoint exception in the interior process. */
1532 DebugBreakProcess
= GETPROCADDRESS (dll
, DebugBreakProcess
);
1534 if (DebugBreakProcess
!= NULL
1535 && DebugBreakProcess (current_process_handle
))
1538 /* Last resort, suspend all threads manually. */
1539 soft_interrupt_requested
= 1;
1543 win32_process_target::supports_hardware_single_step ()
1550 win32_error_to_fileio_error (DWORD err
)
1554 case ERROR_BAD_PATHNAME
:
1555 case ERROR_FILE_NOT_FOUND
:
1556 case ERROR_INVALID_NAME
:
1557 case ERROR_PATH_NOT_FOUND
:
1558 return FILEIO_ENOENT
;
1560 case ERROR_IO_DEVICE
:
1561 case ERROR_OPEN_FAILED
:
1563 case ERROR_INVALID_HANDLE
:
1564 return FILEIO_EBADF
;
1565 case ERROR_ACCESS_DENIED
:
1566 case ERROR_SHARING_VIOLATION
:
1567 return FILEIO_EACCES
;
1568 case ERROR_NOACCESS
:
1569 return FILEIO_EFAULT
;
1571 return FILEIO_EBUSY
;
1572 case ERROR_ALREADY_EXISTS
:
1573 case ERROR_FILE_EXISTS
:
1574 return FILEIO_EEXIST
;
1575 case ERROR_BAD_DEVICE
:
1576 return FILEIO_ENODEV
;
1577 case ERROR_DIRECTORY
:
1578 return FILEIO_ENOTDIR
;
1579 case ERROR_FILENAME_EXCED_RANGE
:
1580 case ERROR_INVALID_DATA
:
1581 case ERROR_INVALID_PARAMETER
:
1582 case ERROR_NEGATIVE_SEEK
:
1583 return FILEIO_EINVAL
;
1584 case ERROR_TOO_MANY_OPEN_FILES
:
1585 return FILEIO_EMFILE
;
1586 case ERROR_HANDLE_DISK_FULL
:
1587 case ERROR_DISK_FULL
:
1588 return FILEIO_ENOSPC
;
1589 case ERROR_WRITE_PROTECT
:
1590 return FILEIO_EROFS
;
1591 case ERROR_NOT_SUPPORTED
:
1592 return FILEIO_ENOSYS
;
1595 return FILEIO_EUNKNOWN
;
1599 win32_process_target::hostio_last_error (char *buf
)
1601 DWORD winerr
= GetLastError ();
1602 int fileio_err
= win32_error_to_fileio_error (winerr
);
1603 sprintf (buf
, "F-1,%x", fileio_err
);
1608 win32_process_target::supports_qxfer_siginfo ()
1613 /* Write Windows signal info. */
1616 win32_process_target::qxfer_siginfo (const char *annex
,
1617 unsigned char *readbuf
,
1618 unsigned const char *writebuf
,
1619 CORE_ADDR offset
, int len
)
1621 if (siginfo_er
.ExceptionCode
== 0)
1624 if (readbuf
== nullptr)
1627 if (offset
> sizeof (siginfo_er
))
1630 if (offset
+ len
> sizeof (siginfo_er
))
1631 len
= sizeof (siginfo_er
) - offset
;
1633 memcpy (readbuf
, (char *) &siginfo_er
+ offset
, len
);
1639 win32_process_target::supports_get_tib_address ()
1644 /* Write Windows OS Thread Information Block address. */
1647 win32_process_target::get_tib_address (ptid_t ptid
, CORE_ADDR
*addr
)
1649 windows_thread_info
*th
;
1650 th
= thread_rec (ptid
, DONT_INVALIDATE_CONTEXT
);
1654 *addr
= th
->thread_local_base
;
1658 /* Implementation of the target_ops method "sw_breakpoint_from_kind". */
1661 win32_process_target::sw_breakpoint_from_kind (int kind
, int *size
)
1663 *size
= the_low_target
.breakpoint_len
;
1664 return the_low_target
.breakpoint
;
1667 /* The win32 target ops object. */
1669 static win32_process_target the_win32_target
;
1671 /* Initialize the Win32 backend. */
1673 initialize_low (void)
1675 set_target_ops (&the_win32_target
);
1676 the_low_target
.arch_setup ();