1 /* Target-vector operations for controlling windows child processes, for GDB.
3 Copyright (C) 1995-2016 Free Software Foundation, Inc.
5 Contributed by Cygnus Solutions, A Red Hat Company.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
22 /* Originally by Steve Chamberlain, sac@cygnus.com */
25 #include "frame.h" /* required by inferior.h */
31 #include "completer.h"
35 #include <sys/types.h>
42 #include <sys/cygwin.h>
43 #include <cygwin/version.h>
47 #include "filenames.h"
51 #include "gdb_obstack.h"
52 #include "gdbthread.h"
58 #include "xml-support.h"
60 #include "i386-tdep.h"
61 #include "i387-tdep.h"
63 #include "windows-tdep.h"
64 #include "windows-nat.h"
66 #include "complaints.h"
67 #include "inf-child.h"
69 #define AdjustTokenPrivileges dyn_AdjustTokenPrivileges
70 #define DebugActiveProcessStop dyn_DebugActiveProcessStop
71 #define DebugBreakProcess dyn_DebugBreakProcess
72 #define DebugSetProcessKillOnExit dyn_DebugSetProcessKillOnExit
73 #define EnumProcessModules dyn_EnumProcessModules
74 #define GetModuleInformation dyn_GetModuleInformation
75 #define LookupPrivilegeValueA dyn_LookupPrivilegeValueA
76 #define OpenProcessToken dyn_OpenProcessToken
77 #define GetConsoleFontSize dyn_GetConsoleFontSize
78 #define GetCurrentConsoleFont dyn_GetCurrentConsoleFont
80 typedef BOOL
WINAPI (AdjustTokenPrivileges_ftype
) (HANDLE
, BOOL
,
82 DWORD
, PTOKEN_PRIVILEGES
,
84 static AdjustTokenPrivileges_ftype
*AdjustTokenPrivileges
;
86 typedef BOOL
WINAPI (DebugActiveProcessStop_ftype
) (DWORD
);
87 static DebugActiveProcessStop_ftype
*DebugActiveProcessStop
;
89 typedef BOOL
WINAPI (DebugBreakProcess_ftype
) (HANDLE
);
90 static DebugBreakProcess_ftype
*DebugBreakProcess
;
92 typedef BOOL
WINAPI (DebugSetProcessKillOnExit_ftype
) (BOOL
);
93 static DebugSetProcessKillOnExit_ftype
*DebugSetProcessKillOnExit
;
95 typedef BOOL
WINAPI (EnumProcessModules_ftype
) (HANDLE
, HMODULE
*, DWORD
,
97 static EnumProcessModules_ftype
*EnumProcessModules
;
99 typedef BOOL
WINAPI (GetModuleInformation_ftype
) (HANDLE
, HMODULE
,
100 LPMODULEINFO
, DWORD
);
101 static GetModuleInformation_ftype
*GetModuleInformation
;
103 typedef BOOL
WINAPI (LookupPrivilegeValueA_ftype
) (LPCSTR
, LPCSTR
, PLUID
);
104 static LookupPrivilegeValueA_ftype
*LookupPrivilegeValueA
;
106 typedef BOOL
WINAPI (OpenProcessToken_ftype
) (HANDLE
, DWORD
, PHANDLE
);
107 static OpenProcessToken_ftype
*OpenProcessToken
;
109 typedef BOOL
WINAPI (GetCurrentConsoleFont_ftype
) (HANDLE
, BOOL
,
110 CONSOLE_FONT_INFO
*);
111 static GetCurrentConsoleFont_ftype
*GetCurrentConsoleFont
;
113 typedef COORD
WINAPI (GetConsoleFontSize_ftype
) (HANDLE
, DWORD
);
114 static GetConsoleFontSize_ftype
*GetConsoleFontSize
;
118 #undef GetModuleFileNameEx
121 # define __PMAX (MAX_PATH + 1)
122 typedef DWORD
WINAPI (GetModuleFileNameEx_ftype
) (HANDLE
, HMODULE
, LPSTR
, DWORD
);
123 static GetModuleFileNameEx_ftype
*GetModuleFileNameEx
;
124 # define STARTUPINFO STARTUPINFOA
125 # define CreateProcess CreateProcessA
126 # define GetModuleFileNameEx_name "GetModuleFileNameExA"
127 # define bad_GetModuleFileNameEx bad_GetModuleFileNameExA
129 # define __PMAX PATH_MAX
130 /* The starting and ending address of the cygwin1.dll text segment. */
131 static CORE_ADDR cygwin_load_start
;
132 static CORE_ADDR cygwin_load_end
;
134 typedef wchar_t cygwin_buf_t
;
135 typedef DWORD
WINAPI (GetModuleFileNameEx_ftype
) (HANDLE
, HMODULE
,
137 static GetModuleFileNameEx_ftype
*GetModuleFileNameEx
;
138 # define STARTUPINFO STARTUPINFOW
139 # define CreateProcess CreateProcessW
140 # define GetModuleFileNameEx_name "GetModuleFileNameExW"
141 # define bad_GetModuleFileNameEx bad_GetModuleFileNameExW
144 static int have_saved_context
; /* True if we've saved context from a
146 static CONTEXT saved_context
; /* Containes the saved context from a
149 /* If we're not using the old Cygwin header file set, define the
150 following which never should have been in the generic Win32 API
151 headers in the first place since they were our own invention... */
152 #ifndef _GNU_H_WINDOWS_H
155 FLAG_TRACE_BIT
= 0x100,
159 #ifndef CONTEXT_EXTENDED_REGISTERS
160 /* This macro is only defined on ia32. It only makes sense on this target,
161 so define it as zero if not already defined. */
162 #define CONTEXT_EXTENDED_REGISTERS 0
165 #define CONTEXT_DEBUGGER_DR CONTEXT_FULL | CONTEXT_FLOATING_POINT \
166 | CONTEXT_SEGMENTS | CONTEXT_DEBUG_REGISTERS \
167 | CONTEXT_EXTENDED_REGISTERS
169 static uintptr_t dr
[8];
170 static int debug_registers_changed
;
171 static int debug_registers_used
;
173 static int windows_initialization_done
;
174 #define DR6_CLEAR_VALUE 0xffff0ff0
176 /* The string sent by cygwin when it processes a signal.
177 FIXME: This should be in a cygwin include file. */
178 #ifndef _CYGWIN_SIGNAL_STRING
179 #define _CYGWIN_SIGNAL_STRING "cYgSiGw00f"
182 #define CHECK(x) check (x, __FILE__,__LINE__)
183 #define DEBUG_EXEC(x) if (debug_exec) printf_unfiltered x
184 #define DEBUG_EVENTS(x) if (debug_events) printf_unfiltered x
185 #define DEBUG_MEM(x) if (debug_memory) printf_unfiltered x
186 #define DEBUG_EXCEPT(x) if (debug_exceptions) printf_unfiltered x
188 static void windows_interrupt (struct target_ops
*self
, ptid_t
);
189 static int windows_thread_alive (struct target_ops
*, ptid_t
);
190 static void windows_kill_inferior (struct target_ops
*);
192 static void cygwin_set_dr (int i
, CORE_ADDR addr
);
193 static void cygwin_set_dr7 (unsigned long val
);
194 static CORE_ADDR
cygwin_get_dr (int i
);
195 static unsigned long cygwin_get_dr6 (void);
196 static unsigned long cygwin_get_dr7 (void);
198 static enum gdb_signal last_sig
= GDB_SIGNAL_0
;
199 /* Set if a signal was received from the debugged process. */
201 /* Thread information structure used to track information that is
202 not available in gdb's thread structure. */
203 typedef struct windows_thread_info_struct
205 struct windows_thread_info_struct
*next
;
208 CORE_ADDR thread_local_base
;
217 static windows_thread_info thread_head
;
219 /* The process and thread handles for the above context. */
221 static DEBUG_EVENT current_event
; /* The current debug event from
223 static HANDLE current_process_handle
; /* Currently executing process */
224 static windows_thread_info
*current_thread
; /* Info on currently selected thread */
225 static DWORD main_thread_id
; /* Thread ID of the main thread */
227 /* Counts of things. */
228 static int exception_count
= 0;
229 static int event_count
= 0;
230 static int saw_create
;
231 static int open_process_used
= 0;
234 static int new_console
= 0;
236 static int cygwin_exceptions
= 0;
238 static int new_group
= 1;
239 static int debug_exec
= 0; /* show execution */
240 static int debug_events
= 0; /* show events from kernel */
241 static int debug_memory
= 0; /* show target memory accesses */
242 static int debug_exceptions
= 0; /* show target exceptions */
243 static int useshell
= 0; /* use shell for subprocesses */
245 /* This vector maps GDB's idea of a register's number into an offset
246 in the windows exception context vector.
248 It also contains the bit mask needed to load the register in question.
250 The contents of this table can only be computed by the units
251 that provide CPU-specific support for Windows native debugging.
252 These units should set the table by calling
253 windows_set_context_register_offsets.
255 One day we could read a reg, we could inspect the context we
256 already have loaded, if it doesn't have the bit set that we need,
257 we read that set of registers in using GetThreadContext. If the
258 context already contains what we need, we just unpack it. Then to
259 write a register, first we have to ensure that the context contains
260 the other regs of the group, and then we copy the info in and set
263 static const int *mappings
;
265 /* The function to use in order to determine whether a register is
266 a segment register or not. */
267 static segment_register_p_ftype
*segment_register_p
;
269 /* This vector maps the target's idea of an exception (extracted
270 from the DEBUG_EVENT structure) to GDB's idea. */
272 struct xlate_exception
278 static const struct xlate_exception
281 {EXCEPTION_ACCESS_VIOLATION
, GDB_SIGNAL_SEGV
},
282 {STATUS_STACK_OVERFLOW
, GDB_SIGNAL_SEGV
},
283 {EXCEPTION_BREAKPOINT
, GDB_SIGNAL_TRAP
},
284 {DBG_CONTROL_C
, GDB_SIGNAL_INT
},
285 {EXCEPTION_SINGLE_STEP
, GDB_SIGNAL_TRAP
},
286 {STATUS_FLOAT_DIVIDE_BY_ZERO
, GDB_SIGNAL_FPE
},
287 {-1, GDB_SIGNAL_UNKNOWN
}};
289 /* Set the MAPPINGS static global to OFFSETS.
290 See the description of MAPPINGS for more details. */
293 windows_set_context_register_offsets (const int *offsets
)
298 /* See windows-nat.h. */
301 windows_set_segment_register_p (segment_register_p_ftype
*fun
)
303 segment_register_p
= fun
;
307 check (BOOL ok
, const char *file
, int line
)
310 printf_filtered ("error return %s:%d was %u\n", file
, line
,
311 (unsigned) GetLastError ());
314 /* Find a thread record given a thread id. If GET_CONTEXT is not 0,
315 then also retrieve the context for this thread. If GET_CONTEXT is
316 negative, then don't suspend the thread. */
317 static windows_thread_info
*
318 thread_rec (DWORD id
, int get_context
)
320 windows_thread_info
*th
;
322 for (th
= &thread_head
; (th
= th
->next
) != NULL
;)
325 if (!th
->suspended
&& get_context
)
327 if (get_context
> 0 && id
!= current_event
.dwThreadId
)
329 if (SuspendThread (th
->h
) == (DWORD
) -1)
331 DWORD err
= GetLastError ();
333 /* We get Access Denied (5) when trying to suspend
334 threads that Windows started on behalf of the
335 debuggee, usually when those threads are just
337 We can get Invalid Handle (6) if the main thread
339 if (err
!= ERROR_INVALID_HANDLE
340 && err
!= ERROR_ACCESS_DENIED
)
341 warning (_("SuspendThread (tid=0x%x) failed."
343 (unsigned) id
, (unsigned) err
);
349 else if (get_context
< 0)
351 th
->reload_context
= 1;
359 /* Add a thread to the thread list. */
360 static windows_thread_info
*
361 windows_add_thread (ptid_t ptid
, HANDLE h
, void *tlb
)
363 windows_thread_info
*th
;
366 gdb_assert (ptid_get_tid (ptid
) != 0);
368 id
= ptid_get_tid (ptid
);
370 if ((th
= thread_rec (id
, FALSE
)))
373 th
= XCNEW (windows_thread_info
);
376 th
->thread_local_base
= (CORE_ADDR
) (uintptr_t) tlb
;
377 th
->next
= thread_head
.next
;
378 thread_head
.next
= th
;
380 /* Set the debug registers for the new thread if they are used. */
381 if (debug_registers_used
)
383 /* Only change the value of the debug registers. */
384 th
->context
.ContextFlags
= CONTEXT_DEBUG_REGISTERS
;
385 CHECK (GetThreadContext (th
->h
, &th
->context
));
386 th
->context
.Dr0
= dr
[0];
387 th
->context
.Dr1
= dr
[1];
388 th
->context
.Dr2
= dr
[2];
389 th
->context
.Dr3
= dr
[3];
390 th
->context
.Dr6
= DR6_CLEAR_VALUE
;
391 th
->context
.Dr7
= dr
[7];
392 CHECK (SetThreadContext (th
->h
, &th
->context
));
393 th
->context
.ContextFlags
= 0;
398 /* Clear out any old thread list and reintialize it to a
401 windows_init_thread_list (void)
403 windows_thread_info
*th
= &thread_head
;
405 DEBUG_EVENTS (("gdb: windows_init_thread_list\n"));
407 while (th
->next
!= NULL
)
409 windows_thread_info
*here
= th
->next
;
410 th
->next
= here
->next
;
413 thread_head
.next
= NULL
;
416 /* Delete a thread from the list of threads. */
418 windows_delete_thread (ptid_t ptid
, DWORD exit_code
)
420 windows_thread_info
*th
;
423 gdb_assert (ptid_get_tid (ptid
) != 0);
425 id
= ptid_get_tid (ptid
);
428 printf_unfiltered ("[Deleting %s]\n", target_pid_to_str (ptid
));
429 else if (print_thread_events
&& id
!= main_thread_id
)
430 printf_unfiltered (_("[%s exited with code %u]\n"),
431 target_pid_to_str (ptid
), (unsigned) exit_code
);
432 delete_thread (ptid
);
434 for (th
= &thread_head
;
435 th
->next
!= NULL
&& th
->next
->id
!= id
;
439 if (th
->next
!= NULL
)
441 windows_thread_info
*here
= th
->next
;
442 th
->next
= here
->next
;
448 do_windows_fetch_inferior_registers (struct regcache
*regcache
, int r
)
450 char *context_offset
= ((char *) ¤t_thread
->context
) + mappings
[r
];
451 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
452 struct gdbarch_tdep
*tdep
= gdbarch_tdep (gdbarch
);
456 return; /* Windows sometimes uses a non-existent thread id in its
459 if (current_thread
->reload_context
)
462 if (have_saved_context
)
464 /* Lie about where the program actually is stopped since
465 cygwin has informed us that we should consider the signal
466 to have occurred at another location which is stored in
468 memcpy (¤t_thread
->context
, &saved_context
,
469 __COPY_CONTEXT_SIZE
);
470 have_saved_context
= 0;
475 windows_thread_info
*th
= current_thread
;
476 th
->context
.ContextFlags
= CONTEXT_DEBUGGER_DR
;
477 CHECK (GetThreadContext (th
->h
, &th
->context
));
478 /* Copy dr values from that thread.
479 But only if there were not modified since last stop.
481 if (!debug_registers_changed
)
483 dr
[0] = th
->context
.Dr0
;
484 dr
[1] = th
->context
.Dr1
;
485 dr
[2] = th
->context
.Dr2
;
486 dr
[3] = th
->context
.Dr3
;
487 dr
[6] = th
->context
.Dr6
;
488 dr
[7] = th
->context
.Dr7
;
491 current_thread
->reload_context
= 0;
494 if (r
== I387_FISEG_REGNUM (tdep
))
496 l
= *((long *) context_offset
) & 0xffff;
497 regcache_raw_supply (regcache
, r
, (char *) &l
);
499 else if (r
== I387_FOP_REGNUM (tdep
))
501 l
= (*((long *) context_offset
) >> 16) & ((1 << 11) - 1);
502 regcache_raw_supply (regcache
, r
, (char *) &l
);
504 else if (segment_register_p (r
))
506 /* GDB treats segment registers as 32bit registers, but they are
507 in fact only 16 bits long. Make sure we do not read extra
508 bits from our source buffer. */
509 l
= *((long *) context_offset
) & 0xffff;
510 regcache_raw_supply (regcache
, r
, (char *) &l
);
513 regcache_raw_supply (regcache
, r
, context_offset
);
516 for (r
= 0; r
< gdbarch_num_regs (gdbarch
); r
++)
517 do_windows_fetch_inferior_registers (regcache
, r
);
522 windows_fetch_inferior_registers (struct target_ops
*ops
,
523 struct regcache
*regcache
, int r
)
525 current_thread
= thread_rec (ptid_get_tid (inferior_ptid
), TRUE
);
526 /* Check if current_thread exists. Windows sometimes uses a non-existent
527 thread id in its events. */
529 do_windows_fetch_inferior_registers (regcache
, r
);
533 do_windows_store_inferior_registers (const struct regcache
*regcache
, int r
)
536 /* Windows sometimes uses a non-existent thread id in its events. */;
538 regcache_raw_collect (regcache
, r
,
539 ((char *) ¤t_thread
->context
) + mappings
[r
]);
542 for (r
= 0; r
< gdbarch_num_regs (get_regcache_arch (regcache
)); r
++)
543 do_windows_store_inferior_registers (regcache
, r
);
547 /* Store a new register value into the current thread context. */
549 windows_store_inferior_registers (struct target_ops
*ops
,
550 struct regcache
*regcache
, int r
)
552 current_thread
= thread_rec (ptid_get_tid (inferior_ptid
), TRUE
);
553 /* Check if current_thread exists. Windows sometimes uses a non-existent
554 thread id in its events. */
556 do_windows_store_inferior_registers (regcache
, r
);
559 /* Encapsulate the information required in a call to
560 symbol_file_add_args. */
561 struct safe_symbol_file_add_args
565 struct section_addr_info
*addrs
;
568 struct ui_file
*err
, *out
;
572 /* Maintain a linked list of "so" information. */
578 static struct so_list solib_start
, *solib_end
;
580 static struct so_list
*
581 windows_make_so (const char *name
, LPVOID load_addr
)
588 WIN32_FIND_DATA w32_fd
;
589 HANDLE h
= FindFirstFile(name
, &w32_fd
);
591 if (h
== INVALID_HANDLE_VALUE
)
597 if (GetCurrentDirectory (MAX_PATH
+ 1, cwd
))
599 p
= strrchr (buf
, '\\');
602 SetCurrentDirectory (buf
);
603 GetFullPathName (w32_fd
.cFileName
, MAX_PATH
, buf
, &p
);
604 SetCurrentDirectory (cwd
);
607 if (strcasecmp (buf
, "ntdll.dll") == 0)
609 GetSystemDirectory (buf
, sizeof (buf
));
610 strcat (buf
, "\\ntdll.dll");
613 cygwin_buf_t buf
[__PMAX
];
616 if (access (name
, F_OK
) != 0)
618 if (strcasecmp (name
, "ntdll.dll") == 0)
621 GetSystemDirectoryW (buf
, sizeof (buf
) / sizeof (wchar_t));
622 wcscat (buf
, L
"\\ntdll.dll");
626 GetSystemDirectoryA (buf
, sizeof (buf
) / sizeof (wchar_t));
627 strcat (buf
, "\\ntdll.dll");
632 so
= XCNEW (struct so_list
);
633 so
->lm_info
= XNEW (struct lm_info
);
634 so
->lm_info
->load_addr
= load_addr
;
635 strcpy (so
->so_original_name
, name
);
637 strcpy (so
->so_name
, buf
);
640 cygwin_conv_path (CCP_WIN_W_TO_POSIX
, buf
, so
->so_name
,
641 SO_NAME_MAX_PATH_SIZE
);
644 char *rname
= realpath (name
, NULL
);
645 if (rname
&& strlen (rname
) < SO_NAME_MAX_PATH_SIZE
)
647 strcpy (so
->so_name
, rname
);
651 error (_("dll path too long"));
653 /* Record cygwin1.dll .text start/end. */
654 p
= strchr (so
->so_name
, '\0') - (sizeof ("/cygwin1.dll") - 1);
655 if (p
>= so
->so_name
&& strcasecmp (p
, "/cygwin1.dll") == 0)
658 asection
*text
= NULL
;
661 abfd
= gdb_bfd_open (so
->so_name
, "pei-i386", -1);
666 if (bfd_check_format (abfd
, bfd_object
))
667 text
= bfd_get_section_by_name (abfd
, ".text");
671 gdb_bfd_unref (abfd
);
675 /* The symbols in a dll are offset by 0x1000, which is the
676 offset from 0 of the first byte in an image - because of the
677 file header and the section alignment. */
678 cygwin_load_start
= (CORE_ADDR
) (uintptr_t) ((char *)
680 cygwin_load_end
= cygwin_load_start
+ bfd_section_size (abfd
, text
);
682 gdb_bfd_unref (abfd
);
690 get_image_name (HANDLE h
, void *address
, int unicode
)
693 static char buf
[__PMAX
];
695 static char buf
[(2 * __PMAX
) + 1];
697 DWORD size
= unicode
? sizeof (WCHAR
) : sizeof (char);
703 /* Attempt to read the name of the dll that was detected.
704 This is documented to work only when actively debugging
705 a program. It will not work for attached processes. */
709 /* See if we could read the address of a string, and that the
710 address isn't null. */
711 if (!ReadProcessMemory (h
, address
, &address_ptr
,
712 sizeof (address_ptr
), &done
)
713 || done
!= sizeof (address_ptr
) || !address_ptr
)
716 /* Find the length of the string. */
717 while (ReadProcessMemory (h
, address_ptr
+ len
++ * size
, &b
, size
, &done
)
718 && (b
[0] != 0 || b
[size
- 1] != 0) && done
== size
)
722 ReadProcessMemory (h
, address_ptr
, buf
, len
, &done
);
725 WCHAR
*unicode_address
= (WCHAR
*) alloca (len
* sizeof (WCHAR
));
726 ReadProcessMemory (h
, address_ptr
, unicode_address
, len
* sizeof (WCHAR
),
729 wcstombs (buf
, unicode_address
, __PMAX
);
731 WideCharToMultiByte (CP_ACP
, 0, unicode_address
, len
, buf
, sizeof buf
,
739 /* Handle a DLL load event, and return 1.
741 This function assumes that this event did not occur during inferior
742 initialization, where their event info may be incomplete (see
743 do_initial_windows_stuff and windows_add_all_dlls for more info
744 on how we handle DLL loading during that phase). */
747 handle_load_dll (void *dummy
)
749 LOAD_DLL_DEBUG_INFO
*event
= ¤t_event
.u
.LoadDll
;
752 /* Try getting the DLL name via the lpImageName field of the event.
753 Note that Microsoft documents this fields as strictly optional,
754 in the sense that it might be NULL. And the first DLL event in
755 particular is explicitly documented as "likely not pass[ed]"
756 (source: MSDN LOAD_DLL_DEBUG_INFO structure). */
757 dll_name
= get_image_name (current_process_handle
,
758 event
->lpImageName
, event
->fUnicode
);
762 solib_end
->next
= windows_make_so (dll_name
, event
->lpBaseOfDll
);
763 solib_end
= solib_end
->next
;
765 DEBUG_EVENTS (("gdb: Loading dll \"%s\" at %s.\n", solib_end
->so_name
,
766 host_address_to_string (solib_end
->lm_info
->load_addr
)));
772 windows_free_so (struct so_list
*so
)
779 /* Handle a DLL unload event.
780 Return 1 if successful, or zero otherwise.
782 This function assumes that this event did not occur during inferior
783 initialization, where their event info may be incomplete (see
784 do_initial_windows_stuff and windows_add_all_dlls for more info
785 on how we handle DLL loading during that phase). */
788 handle_unload_dll (void *dummy
)
790 LPVOID lpBaseOfDll
= current_event
.u
.UnloadDll
.lpBaseOfDll
;
793 for (so
= &solib_start
; so
->next
!= NULL
; so
= so
->next
)
794 if (so
->next
->lm_info
->load_addr
== lpBaseOfDll
)
796 struct so_list
*sodel
= so
->next
;
798 so
->next
= sodel
->next
;
801 DEBUG_EVENTS (("gdb: Unloading dll \"%s\".\n", sodel
->so_name
));
803 windows_free_so (sodel
);
807 /* We did not find any DLL that was previously loaded at this address,
808 so register a complaint. We do not report an error, because we have
809 observed that this may be happening under some circumstances. For
810 instance, running 32bit applications on x64 Windows causes us to receive
811 4 mysterious UNLOAD_DLL_DEBUG_EVENTs during the startup phase (these
812 events are apparently caused by the WOW layer, the interface between
813 32bit and 64bit worlds). */
814 complaint (&symfile_complaints
, _("dll starting at %s not found."),
815 host_address_to_string (lpBaseOfDll
));
820 /* Clear list of loaded DLLs. */
822 windows_clear_solib (void)
824 solib_start
.next
= NULL
;
825 solib_end
= &solib_start
;
828 /* Handle DEBUG_STRING output from child process.
829 Cygwin prepends its messages with a "cygwin:". Interpret this as
830 a Cygwin signal. Otherwise just print the string as a warning. */
832 handle_output_debug_string (struct target_waitstatus
*ourstatus
)
837 if (!target_read_string
838 ((CORE_ADDR
) (uintptr_t) current_event
.u
.DebugString
.lpDebugStringData
,
842 else if (!startswith (s
, _CYGWIN_SIGNAL_STRING
))
845 if (!startswith (s
, "cYg"))
848 char *p
= strchr (s
, '\0');
850 if (p
> s
&& *--p
== '\n')
858 /* Got a cygwin signal marker. A cygwin signal is followed by
859 the signal number itself and then optionally followed by the
860 thread id and address to saved context within the DLL. If
861 these are supplied, then the given thread is assumed to have
862 issued the signal and the context from the thread is assumed
863 to be stored at the given address in the inferior. Tell gdb
864 to treat this like a real signal. */
866 int sig
= strtol (s
+ sizeof (_CYGWIN_SIGNAL_STRING
) - 1, &p
, 0);
867 gdb_signal gotasig
= gdb_signal_from_host (sig
);
869 ourstatus
->value
.sig
= gotasig
;
875 ourstatus
->kind
= TARGET_WAITKIND_STOPPED
;
876 retval
= strtoul (p
, &p
, 0);
878 retval
= main_thread_id
;
879 else if ((x
= (LPCVOID
) (uintptr_t) strtoull (p
, NULL
, 0))
880 && ReadProcessMemory (current_process_handle
, x
,
882 __COPY_CONTEXT_SIZE
, &n
)
883 && n
== __COPY_CONTEXT_SIZE
)
884 have_saved_context
= 1;
895 display_selector (HANDLE thread
, DWORD sel
)
898 if (GetThreadSelectorEntry (thread
, sel
, &info
))
901 printf_filtered ("0x%03x: ", (unsigned) sel
);
902 if (!info
.HighWord
.Bits
.Pres
)
904 puts_filtered ("Segment not present\n");
907 base
= (info
.HighWord
.Bits
.BaseHi
<< 24) +
908 (info
.HighWord
.Bits
.BaseMid
<< 16)
910 limit
= (info
.HighWord
.Bits
.LimitHi
<< 16) + info
.LimitLow
;
911 if (info
.HighWord
.Bits
.Granularity
)
912 limit
= (limit
<< 12) | 0xfff;
913 printf_filtered ("base=0x%08x limit=0x%08x", base
, limit
);
914 if (info
.HighWord
.Bits
.Default_Big
)
915 puts_filtered(" 32-bit ");
917 puts_filtered(" 16-bit ");
918 switch ((info
.HighWord
.Bits
.Type
& 0xf) >> 1)
921 puts_filtered ("Data (Read-Only, Exp-up");
924 puts_filtered ("Data (Read/Write, Exp-up");
927 puts_filtered ("Unused segment (");
930 puts_filtered ("Data (Read/Write, Exp-down");
933 puts_filtered ("Code (Exec-Only, N.Conf");
936 puts_filtered ("Code (Exec/Read, N.Conf");
939 puts_filtered ("Code (Exec-Only, Conf");
942 puts_filtered ("Code (Exec/Read, Conf");
945 printf_filtered ("Unknown type 0x%x",info
.HighWord
.Bits
.Type
);
947 if ((info
.HighWord
.Bits
.Type
& 0x1) == 0)
948 puts_filtered(", N.Acc");
949 puts_filtered (")\n");
950 if ((info
.HighWord
.Bits
.Type
& 0x10) == 0)
951 puts_filtered("System selector ");
952 printf_filtered ("Priviledge level = %d. ", info
.HighWord
.Bits
.Dpl
);
953 if (info
.HighWord
.Bits
.Granularity
)
954 puts_filtered ("Page granular.\n");
956 puts_filtered ("Byte granular.\n");
961 DWORD err
= GetLastError ();
962 if (err
== ERROR_NOT_SUPPORTED
)
963 printf_filtered ("Function not supported\n");
965 printf_filtered ("Invalid selector 0x%x.\n", (unsigned) sel
);
971 display_selectors (char * args
, int from_tty
)
975 puts_filtered ("Impossible to display selectors now.\n");
981 puts_filtered ("Selector $cs\n");
982 display_selector (current_thread
->h
,
983 current_thread
->context
.SegCs
);
984 puts_filtered ("Selector $ds\n");
985 display_selector (current_thread
->h
,
986 current_thread
->context
.SegDs
);
987 puts_filtered ("Selector $es\n");
988 display_selector (current_thread
->h
,
989 current_thread
->context
.SegEs
);
990 puts_filtered ("Selector $ss\n");
991 display_selector (current_thread
->h
,
992 current_thread
->context
.SegSs
);
993 puts_filtered ("Selector $fs\n");
994 display_selector (current_thread
->h
,
995 current_thread
->context
.SegFs
);
996 puts_filtered ("Selector $gs\n");
997 display_selector (current_thread
->h
,
998 current_thread
->context
.SegGs
);
1003 sel
= parse_and_eval_long (args
);
1004 printf_filtered ("Selector \"%s\"\n",args
);
1005 display_selector (current_thread
->h
, sel
);
1009 #define DEBUG_EXCEPTION_SIMPLE(x) if (debug_exceptions) \
1010 printf_unfiltered ("gdb: Target exception %s at %s\n", x, \
1011 host_address_to_string (\
1012 current_event.u.Exception.ExceptionRecord.ExceptionAddress))
1015 handle_exception (struct target_waitstatus
*ourstatus
)
1017 DWORD code
= current_event
.u
.Exception
.ExceptionRecord
.ExceptionCode
;
1019 ourstatus
->kind
= TARGET_WAITKIND_STOPPED
;
1021 /* Record the context of the current thread. */
1022 thread_rec (current_event
.dwThreadId
, -1);
1026 case EXCEPTION_ACCESS_VIOLATION
:
1027 DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_ACCESS_VIOLATION");
1028 ourstatus
->value
.sig
= GDB_SIGNAL_SEGV
;
1031 /* See if the access violation happened within the cygwin DLL
1032 itself. Cygwin uses a kind of exception handling to deal
1033 with passed-in invalid addresses. gdb should not treat
1034 these as real SEGVs since they will be silently handled by
1035 cygwin. A real SEGV will (theoretically) be caught by
1036 cygwin later in the process and will be sent as a
1037 cygwin-specific-signal. So, ignore SEGVs if they show up
1038 within the text segment of the DLL itself. */
1040 CORE_ADDR addr
= (CORE_ADDR
) (uintptr_t)
1041 current_event
.u
.Exception
.ExceptionRecord
.ExceptionAddress
;
1043 if ((!cygwin_exceptions
&& (addr
>= cygwin_load_start
1044 && addr
< cygwin_load_end
))
1045 || (find_pc_partial_function (addr
, &fn
, NULL
, NULL
)
1046 && startswith (fn
, "KERNEL32!IsBad")))
1051 case STATUS_STACK_OVERFLOW
:
1052 DEBUG_EXCEPTION_SIMPLE ("STATUS_STACK_OVERFLOW");
1053 ourstatus
->value
.sig
= GDB_SIGNAL_SEGV
;
1055 case STATUS_FLOAT_DENORMAL_OPERAND
:
1056 DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_DENORMAL_OPERAND");
1057 ourstatus
->value
.sig
= GDB_SIGNAL_FPE
;
1059 case EXCEPTION_ARRAY_BOUNDS_EXCEEDED
:
1060 DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_ARRAY_BOUNDS_EXCEEDED");
1061 ourstatus
->value
.sig
= GDB_SIGNAL_FPE
;
1063 case STATUS_FLOAT_INEXACT_RESULT
:
1064 DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_INEXACT_RESULT");
1065 ourstatus
->value
.sig
= GDB_SIGNAL_FPE
;
1067 case STATUS_FLOAT_INVALID_OPERATION
:
1068 DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_INVALID_OPERATION");
1069 ourstatus
->value
.sig
= GDB_SIGNAL_FPE
;
1071 case STATUS_FLOAT_OVERFLOW
:
1072 DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_OVERFLOW");
1073 ourstatus
->value
.sig
= GDB_SIGNAL_FPE
;
1075 case STATUS_FLOAT_STACK_CHECK
:
1076 DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_STACK_CHECK");
1077 ourstatus
->value
.sig
= GDB_SIGNAL_FPE
;
1079 case STATUS_FLOAT_UNDERFLOW
:
1080 DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_UNDERFLOW");
1081 ourstatus
->value
.sig
= GDB_SIGNAL_FPE
;
1083 case STATUS_FLOAT_DIVIDE_BY_ZERO
:
1084 DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_DIVIDE_BY_ZERO");
1085 ourstatus
->value
.sig
= GDB_SIGNAL_FPE
;
1087 case STATUS_INTEGER_DIVIDE_BY_ZERO
:
1088 DEBUG_EXCEPTION_SIMPLE ("STATUS_INTEGER_DIVIDE_BY_ZERO");
1089 ourstatus
->value
.sig
= GDB_SIGNAL_FPE
;
1091 case STATUS_INTEGER_OVERFLOW
:
1092 DEBUG_EXCEPTION_SIMPLE ("STATUS_INTEGER_OVERFLOW");
1093 ourstatus
->value
.sig
= GDB_SIGNAL_FPE
;
1095 case EXCEPTION_BREAKPOINT
:
1096 DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_BREAKPOINT");
1097 ourstatus
->value
.sig
= GDB_SIGNAL_TRAP
;
1100 DEBUG_EXCEPTION_SIMPLE ("DBG_CONTROL_C");
1101 ourstatus
->value
.sig
= GDB_SIGNAL_INT
;
1103 case DBG_CONTROL_BREAK
:
1104 DEBUG_EXCEPTION_SIMPLE ("DBG_CONTROL_BREAK");
1105 ourstatus
->value
.sig
= GDB_SIGNAL_INT
;
1107 case EXCEPTION_SINGLE_STEP
:
1108 DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_SINGLE_STEP");
1109 ourstatus
->value
.sig
= GDB_SIGNAL_TRAP
;
1111 case EXCEPTION_ILLEGAL_INSTRUCTION
:
1112 DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_ILLEGAL_INSTRUCTION");
1113 ourstatus
->value
.sig
= GDB_SIGNAL_ILL
;
1115 case EXCEPTION_PRIV_INSTRUCTION
:
1116 DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_PRIV_INSTRUCTION");
1117 ourstatus
->value
.sig
= GDB_SIGNAL_ILL
;
1119 case EXCEPTION_NONCONTINUABLE_EXCEPTION
:
1120 DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_NONCONTINUABLE_EXCEPTION");
1121 ourstatus
->value
.sig
= GDB_SIGNAL_ILL
;
1124 /* Treat unhandled first chance exceptions specially. */
1125 if (current_event
.u
.Exception
.dwFirstChance
)
1127 printf_unfiltered ("gdb: unknown target exception 0x%08x at %s\n",
1128 (unsigned) current_event
.u
.Exception
.ExceptionRecord
.ExceptionCode
,
1129 host_address_to_string (
1130 current_event
.u
.Exception
.ExceptionRecord
.ExceptionAddress
));
1131 ourstatus
->value
.sig
= GDB_SIGNAL_UNKNOWN
;
1135 last_sig
= ourstatus
->value
.sig
;
1139 /* Resume thread specified by ID, or all artificially suspended
1140 threads, if we are continuing execution. KILLED non-zero means we
1141 have killed the inferior, so we should ignore weird errors due to
1142 threads shutting down. */
1144 windows_continue (DWORD continue_status
, int id
, int killed
)
1147 windows_thread_info
*th
;
1150 DEBUG_EVENTS (("ContinueDebugEvent (cpid=%d, ctid=0x%x, %s);\n",
1151 (unsigned) current_event
.dwProcessId
,
1152 (unsigned) current_event
.dwThreadId
,
1153 continue_status
== DBG_CONTINUE
?
1154 "DBG_CONTINUE" : "DBG_EXCEPTION_NOT_HANDLED"));
1156 for (th
= &thread_head
; (th
= th
->next
) != NULL
;)
1157 if ((id
== -1 || id
== (int) th
->id
)
1160 if (debug_registers_changed
)
1162 th
->context
.ContextFlags
|= CONTEXT_DEBUG_REGISTERS
;
1163 th
->context
.Dr0
= dr
[0];
1164 th
->context
.Dr1
= dr
[1];
1165 th
->context
.Dr2
= dr
[2];
1166 th
->context
.Dr3
= dr
[3];
1167 th
->context
.Dr6
= DR6_CLEAR_VALUE
;
1168 th
->context
.Dr7
= dr
[7];
1170 if (th
->context
.ContextFlags
)
1174 if (GetExitCodeThread (th
->h
, &ec
)
1175 && ec
== STILL_ACTIVE
)
1177 BOOL status
= SetThreadContext (th
->h
, &th
->context
);
1182 th
->context
.ContextFlags
= 0;
1184 if (th
->suspended
> 0)
1185 (void) ResumeThread (th
->h
);
1189 res
= ContinueDebugEvent (current_event
.dwProcessId
,
1190 current_event
.dwThreadId
,
1194 error (_("Failed to resume program execution"
1195 " (ContinueDebugEvent failed, error %u)"),
1196 (unsigned int) GetLastError ());
1198 debug_registers_changed
= 0;
1202 /* Called in pathological case where Windows fails to send a
1203 CREATE_PROCESS_DEBUG_EVENT after an attach. */
1205 fake_create_process (void)
1207 current_process_handle
= OpenProcess (PROCESS_ALL_ACCESS
, FALSE
,
1208 current_event
.dwProcessId
);
1209 if (current_process_handle
!= NULL
)
1210 open_process_used
= 1;
1213 error (_("OpenProcess call failed, GetLastError = %u"),
1214 (unsigned) GetLastError ());
1215 /* We can not debug anything in that case. */
1217 main_thread_id
= current_event
.dwThreadId
;
1218 current_thread
= windows_add_thread (
1219 ptid_build (current_event
.dwProcessId
, 0,
1220 current_event
.dwThreadId
),
1221 current_event
.u
.CreateThread
.hThread
,
1222 current_event
.u
.CreateThread
.lpThreadLocalBase
);
1223 return main_thread_id
;
1227 windows_resume (struct target_ops
*ops
,
1228 ptid_t ptid
, int step
, enum gdb_signal sig
)
1230 windows_thread_info
*th
;
1231 DWORD continue_status
= DBG_CONTINUE
;
1233 /* A specific PTID means `step only this thread id'. */
1234 int resume_all
= ptid_equal (ptid
, minus_one_ptid
);
1236 /* If we're continuing all threads, it's the current inferior that
1237 should be handled specially. */
1239 ptid
= inferior_ptid
;
1241 if (sig
!= GDB_SIGNAL_0
)
1243 if (current_event
.dwDebugEventCode
!= EXCEPTION_DEBUG_EVENT
)
1245 DEBUG_EXCEPT(("Cannot continue with signal %d here.\n",sig
));
1247 else if (sig
== last_sig
)
1248 continue_status
= DBG_EXCEPTION_NOT_HANDLED
;
1251 /* This code does not seem to work, because
1252 the kernel does probably not consider changes in the ExceptionRecord
1253 structure when passing the exception to the inferior.
1254 Note that this seems possible in the exception handler itself. */
1257 for (i
= 0; xlate
[i
].them
!= -1; i
++)
1258 if (xlate
[i
].us
== sig
)
1260 current_event
.u
.Exception
.ExceptionRecord
.ExceptionCode
1262 continue_status
= DBG_EXCEPTION_NOT_HANDLED
;
1265 if (continue_status
== DBG_CONTINUE
)
1267 DEBUG_EXCEPT(("Cannot continue with signal %d.\n",sig
));
1271 DEBUG_EXCEPT(("Can only continue with received signal %d.\n",
1275 last_sig
= GDB_SIGNAL_0
;
1277 DEBUG_EXEC (("gdb: windows_resume (pid=%d, tid=%ld, step=%d, sig=%d);\n",
1278 ptid_get_pid (ptid
), ptid_get_tid (ptid
), step
, sig
));
1280 /* Get context for currently selected thread. */
1281 th
= thread_rec (ptid_get_tid (inferior_ptid
), FALSE
);
1286 /* Single step by setting t bit. */
1287 struct regcache
*regcache
= get_current_regcache ();
1288 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
1289 windows_fetch_inferior_registers (ops
, regcache
,
1290 gdbarch_ps_regnum (gdbarch
));
1291 th
->context
.EFlags
|= FLAG_TRACE_BIT
;
1294 if (th
->context
.ContextFlags
)
1296 if (debug_registers_changed
)
1298 th
->context
.Dr0
= dr
[0];
1299 th
->context
.Dr1
= dr
[1];
1300 th
->context
.Dr2
= dr
[2];
1301 th
->context
.Dr3
= dr
[3];
1302 th
->context
.Dr6
= DR6_CLEAR_VALUE
;
1303 th
->context
.Dr7
= dr
[7];
1305 CHECK (SetThreadContext (th
->h
, &th
->context
));
1306 th
->context
.ContextFlags
= 0;
1310 /* Allow continuing with the same signal that interrupted us.
1311 Otherwise complain. */
1314 windows_continue (continue_status
, -1, 0);
1316 windows_continue (continue_status
, ptid_get_tid (ptid
), 0);
1319 /* Ctrl-C handler used when the inferior is not run in the same console. The
1320 handler is in charge of interrupting the inferior using DebugBreakProcess.
1321 Note that this function is not available prior to Windows XP. In this case
1322 we emit a warning. */
1324 ctrl_c_handler (DWORD event_type
)
1326 const int attach_flag
= current_inferior ()->attach_flag
;
1328 /* Only handle Ctrl-C and Ctrl-Break events. Ignore others. */
1329 if (event_type
!= CTRL_C_EVENT
&& event_type
!= CTRL_BREAK_EVENT
)
1332 /* If the inferior and the debugger share the same console, do nothing as
1333 the inferior has also received the Ctrl-C event. */
1334 if (!new_console
&& !attach_flag
)
1337 if (!DebugBreakProcess (current_process_handle
))
1338 warning (_("Could not interrupt program. "
1339 "Press Ctrl-c in the program console."));
1341 /* Return true to tell that Ctrl-C has been handled. */
1345 /* Get the next event from the child. Returns a non-zero thread id if the event
1346 requires handling by WFI (or whatever). */
1348 get_windows_debug_event (struct target_ops
*ops
,
1349 int pid
, struct target_waitstatus
*ourstatus
)
1352 DWORD continue_status
, event_code
;
1353 windows_thread_info
*th
;
1354 static windows_thread_info dummy_thread_info
;
1355 DWORD thread_id
= 0;
1357 last_sig
= GDB_SIGNAL_0
;
1359 if (!(debug_event
= WaitForDebugEvent (¤t_event
, 1000)))
1363 continue_status
= DBG_CONTINUE
;
1365 event_code
= current_event
.dwDebugEventCode
;
1366 ourstatus
->kind
= TARGET_WAITKIND_SPURIOUS
;
1368 have_saved_context
= 0;
1372 case CREATE_THREAD_DEBUG_EVENT
:
1373 DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=0x%x code=%s)\n",
1374 (unsigned) current_event
.dwProcessId
,
1375 (unsigned) current_event
.dwThreadId
,
1376 "CREATE_THREAD_DEBUG_EVENT"));
1377 if (saw_create
!= 1)
1379 struct inferior
*inf
;
1380 inf
= find_inferior_pid (current_event
.dwProcessId
);
1381 if (!saw_create
&& inf
->attach_flag
)
1383 /* Kludge around a Windows bug where first event is a create
1384 thread event. Caused when attached process does not have
1386 thread_id
= fake_create_process ();
1392 /* Record the existence of this thread. */
1393 thread_id
= current_event
.dwThreadId
;
1394 th
= windows_add_thread (ptid_build (current_event
.dwProcessId
, 0,
1395 current_event
.dwThreadId
),
1396 current_event
.u
.CreateThread
.hThread
,
1397 current_event
.u
.CreateThread
.lpThreadLocalBase
);
1401 case EXIT_THREAD_DEBUG_EVENT
:
1402 DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=0x%x code=%s)\n",
1403 (unsigned) current_event
.dwProcessId
,
1404 (unsigned) current_event
.dwThreadId
,
1405 "EXIT_THREAD_DEBUG_EVENT"));
1407 if (current_event
.dwThreadId
!= main_thread_id
)
1409 windows_delete_thread (ptid_build (current_event
.dwProcessId
, 0,
1410 current_event
.dwThreadId
),
1411 current_event
.u
.ExitThread
.dwExitCode
);
1412 th
= &dummy_thread_info
;
1416 case CREATE_PROCESS_DEBUG_EVENT
:
1417 DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=0x%x code=%s)\n",
1418 (unsigned) current_event
.dwProcessId
,
1419 (unsigned) current_event
.dwThreadId
,
1420 "CREATE_PROCESS_DEBUG_EVENT"));
1421 CloseHandle (current_event
.u
.CreateProcessInfo
.hFile
);
1422 if (++saw_create
!= 1)
1425 current_process_handle
= current_event
.u
.CreateProcessInfo
.hProcess
;
1427 windows_delete_thread (ptid_build (current_event
.dwProcessId
, 0,
1430 main_thread_id
= current_event
.dwThreadId
;
1431 /* Add the main thread. */
1432 th
= windows_add_thread (ptid_build (current_event
.dwProcessId
, 0,
1433 current_event
.dwThreadId
),
1434 current_event
.u
.CreateProcessInfo
.hThread
,
1435 current_event
.u
.CreateProcessInfo
.lpThreadLocalBase
);
1436 thread_id
= current_event
.dwThreadId
;
1439 case EXIT_PROCESS_DEBUG_EVENT
:
1440 DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=0x%x code=%s)\n",
1441 (unsigned) current_event
.dwProcessId
,
1442 (unsigned) current_event
.dwThreadId
,
1443 "EXIT_PROCESS_DEBUG_EVENT"));
1444 if (!windows_initialization_done
)
1446 target_terminal_ours ();
1447 target_mourn_inferior ();
1448 error (_("During startup program exited with code 0x%x."),
1449 (unsigned int) current_event
.u
.ExitProcess
.dwExitCode
);
1451 else if (saw_create
== 1)
1453 ourstatus
->kind
= TARGET_WAITKIND_EXITED
;
1454 ourstatus
->value
.integer
= current_event
.u
.ExitProcess
.dwExitCode
;
1455 thread_id
= main_thread_id
;
1459 case LOAD_DLL_DEBUG_EVENT
:
1460 DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=0x%x code=%s)\n",
1461 (unsigned) current_event
.dwProcessId
,
1462 (unsigned) current_event
.dwThreadId
,
1463 "LOAD_DLL_DEBUG_EVENT"));
1464 CloseHandle (current_event
.u
.LoadDll
.hFile
);
1465 if (saw_create
!= 1 || ! windows_initialization_done
)
1467 catch_errors (handle_load_dll
, NULL
, (char *) "", RETURN_MASK_ALL
);
1468 ourstatus
->kind
= TARGET_WAITKIND_LOADED
;
1469 ourstatus
->value
.integer
= 0;
1470 thread_id
= main_thread_id
;
1473 case UNLOAD_DLL_DEBUG_EVENT
:
1474 DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=0x%x code=%s)\n",
1475 (unsigned) current_event
.dwProcessId
,
1476 (unsigned) current_event
.dwThreadId
,
1477 "UNLOAD_DLL_DEBUG_EVENT"));
1478 if (saw_create
!= 1 || ! windows_initialization_done
)
1480 catch_errors (handle_unload_dll
, NULL
, (char *) "", RETURN_MASK_ALL
);
1481 ourstatus
->kind
= TARGET_WAITKIND_LOADED
;
1482 ourstatus
->value
.integer
= 0;
1483 thread_id
= main_thread_id
;
1486 case EXCEPTION_DEBUG_EVENT
:
1487 DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=0x%x code=%s)\n",
1488 (unsigned) current_event
.dwProcessId
,
1489 (unsigned) current_event
.dwThreadId
,
1490 "EXCEPTION_DEBUG_EVENT"));
1491 if (saw_create
!= 1)
1493 if (handle_exception (ourstatus
))
1494 thread_id
= current_event
.dwThreadId
;
1496 continue_status
= DBG_EXCEPTION_NOT_HANDLED
;
1499 case OUTPUT_DEBUG_STRING_EVENT
: /* Message from the kernel. */
1500 DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=0x%x code=%s)\n",
1501 (unsigned) current_event
.dwProcessId
,
1502 (unsigned) current_event
.dwThreadId
,
1503 "OUTPUT_DEBUG_STRING_EVENT"));
1504 if (saw_create
!= 1)
1506 thread_id
= handle_output_debug_string (ourstatus
);
1510 if (saw_create
!= 1)
1512 printf_unfiltered ("gdb: kernel event for pid=%u tid=0x%x\n",
1513 (unsigned) current_event
.dwProcessId
,
1514 (unsigned) current_event
.dwThreadId
);
1515 printf_unfiltered (" unknown event code %u\n",
1516 (unsigned) current_event
.dwDebugEventCode
);
1520 if (!thread_id
|| saw_create
!= 1)
1522 CHECK (windows_continue (continue_status
, -1, 0));
1526 inferior_ptid
= ptid_build (current_event
.dwProcessId
, 0,
1528 current_thread
= th
;
1529 if (!current_thread
)
1530 current_thread
= thread_rec (thread_id
, TRUE
);
1537 /* Wait for interesting events to occur in the target process. */
1539 windows_wait (struct target_ops
*ops
,
1540 ptid_t ptid
, struct target_waitstatus
*ourstatus
, int options
)
1544 target_terminal_ours ();
1546 /* We loop when we get a non-standard exception rather than return
1547 with a SPURIOUS because resume can try and step or modify things,
1548 which needs a current_thread->h. But some of these exceptions mark
1549 the birth or death of threads, which mean that the current thread
1550 isn't necessarily what you think it is. */
1556 /* If the user presses Ctrl-c while the debugger is waiting
1557 for an event, he expects the debugger to interrupt his program
1558 and to get the prompt back. There are two possible situations:
1560 - The debugger and the program do not share the console, in
1561 which case the Ctrl-c event only reached the debugger.
1562 In that case, the ctrl_c handler will take care of interrupting
1563 the inferior. Note that this case is working starting with
1564 Windows XP. For Windows 2000, Ctrl-C should be pressed in the
1567 - The debugger and the program share the same console, in which
1568 case both debugger and inferior will receive the Ctrl-c event.
1569 In that case the ctrl_c handler will ignore the event, as the
1570 Ctrl-c event generated inside the inferior will trigger the
1571 expected debug event.
1573 FIXME: brobecker/2008-05-20: If the inferior receives the
1574 signal first and the delay until GDB receives that signal
1575 is sufficiently long, GDB can sometimes receive the SIGINT
1576 after we have unblocked the CTRL+C handler. This would
1577 lead to the debugger stopping prematurely while handling
1578 the new-thread event that comes with the handling of the SIGINT
1579 inside the inferior, and then stop again immediately when
1580 the user tries to resume the execution in the inferior.
1581 This is a classic race that we should try to fix one day. */
1582 SetConsoleCtrlHandler (&ctrl_c_handler
, TRUE
);
1583 retval
= get_windows_debug_event (ops
, pid
, ourstatus
);
1584 SetConsoleCtrlHandler (&ctrl_c_handler
, FALSE
);
1587 return ptid_build (current_event
.dwProcessId
, 0, retval
);
1592 if (deprecated_ui_loop_hook
!= NULL
)
1593 detach
= deprecated_ui_loop_hook (0);
1596 windows_kill_inferior (ops
);
1601 /* Iterate over all DLLs currently mapped by our inferior, and
1602 add them to our list of solibs. */
1605 windows_add_all_dlls (void)
1608 HMODULE dummy_hmodule
;
1613 if (EnumProcessModules (current_process_handle
, &dummy_hmodule
,
1614 sizeof (HMODULE
), &cb_needed
) == 0)
1620 hmodules
= (HMODULE
*) alloca (cb_needed
);
1621 if (EnumProcessModules (current_process_handle
, hmodules
,
1622 cb_needed
, &cb_needed
) == 0)
1625 for (i
= 1; i
< (int) (cb_needed
/ sizeof (HMODULE
)); i
++)
1629 wchar_t dll_name
[__PMAX
];
1632 char dll_name
[__PMAX
];
1635 if (GetModuleInformation (current_process_handle
, hmodules
[i
],
1636 &mi
, sizeof (mi
)) == 0)
1638 if (GetModuleFileNameEx (current_process_handle
, hmodules
[i
],
1639 dll_name
, sizeof (dll_name
)) == 0)
1642 wcstombs (name
, dll_name
, __PMAX
);
1647 solib_end
->next
= windows_make_so (name
, mi
.lpBaseOfDll
);
1648 solib_end
= solib_end
->next
;
1653 do_initial_windows_stuff (struct target_ops
*ops
, DWORD pid
, int attaching
)
1656 struct inferior
*inf
;
1657 struct thread_info
*tp
;
1659 last_sig
= GDB_SIGNAL_0
;
1661 exception_count
= 0;
1662 open_process_used
= 0;
1663 debug_registers_changed
= 0;
1664 debug_registers_used
= 0;
1665 for (i
= 0; i
< sizeof (dr
) / sizeof (dr
[0]); i
++)
1668 cygwin_load_start
= cygwin_load_end
= 0;
1670 current_event
.dwProcessId
= pid
;
1671 memset (¤t_event
, 0, sizeof (current_event
));
1672 if (!target_is_pushed (ops
))
1674 disable_breakpoints_in_shlibs ();
1675 windows_clear_solib ();
1676 clear_proceed_status (0);
1677 init_wait_for_inferior ();
1679 inf
= current_inferior ();
1680 inferior_appeared (inf
, pid
);
1681 inf
->attach_flag
= attaching
;
1683 /* Make the new process the current inferior, so terminal handling
1684 can rely on it. When attaching, we don't know about any thread
1685 id here, but that's OK --- nothing should be referencing the
1686 current thread until we report an event out of windows_wait. */
1687 inferior_ptid
= pid_to_ptid (pid
);
1689 target_terminal_init ();
1690 target_terminal_inferior ();
1692 windows_initialization_done
= 0;
1696 struct target_waitstatus status
;
1698 windows_wait (ops
, minus_one_ptid
, &status
, 0);
1700 /* Note windows_wait returns TARGET_WAITKIND_SPURIOUS for thread
1702 if (status
.kind
!= TARGET_WAITKIND_LOADED
1703 && status
.kind
!= TARGET_WAITKIND_SPURIOUS
)
1706 windows_resume (ops
, minus_one_ptid
, 0, GDB_SIGNAL_0
);
1709 /* Now that the inferior has been started and all DLLs have been mapped,
1710 we can iterate over all DLLs and load them in.
1712 We avoid doing it any earlier because, on certain versions of Windows,
1713 LOAD_DLL_DEBUG_EVENTs are sometimes not complete. In particular,
1714 we have seen on Windows 8.1 that the ntdll.dll load event does not
1715 include the DLL name, preventing us from creating an associated SO.
1716 A possible explanation is that ntdll.dll might be mapped before
1717 the SO info gets created by the Windows system -- ntdll.dll is
1718 the first DLL to be reported via LOAD_DLL_DEBUG_EVENT and other DLLs
1719 do not seem to suffer from that problem.
1721 Rather than try to work around this sort of issue, it is much
1722 simpler to just ignore DLL load/unload events during the startup
1723 phase, and then process them all in one batch now. */
1724 windows_add_all_dlls ();
1726 windows_initialization_done
= 1;
1730 /* Try to set or remove a user privilege to the current process. Return -1
1731 if that fails, the previous setting of that privilege otherwise.
1733 This code is copied from the Cygwin source code and rearranged to allow
1734 dynamically loading of the needed symbols from advapi32 which is only
1735 available on NT/2K/XP. */
1737 set_process_privilege (const char *privilege
, BOOL enable
)
1739 HANDLE token_hdl
= NULL
;
1741 TOKEN_PRIVILEGES new_priv
, orig_priv
;
1745 if (!OpenProcessToken (GetCurrentProcess (),
1746 TOKEN_QUERY
| TOKEN_ADJUST_PRIVILEGES
,
1750 if (!LookupPrivilegeValueA (NULL
, privilege
, &restore_priv
))
1753 new_priv
.PrivilegeCount
= 1;
1754 new_priv
.Privileges
[0].Luid
= restore_priv
;
1755 new_priv
.Privileges
[0].Attributes
= enable
? SE_PRIVILEGE_ENABLED
: 0;
1757 if (!AdjustTokenPrivileges (token_hdl
, FALSE
, &new_priv
,
1758 sizeof orig_priv
, &orig_priv
, &size
))
1761 /* Disabled, otherwise every `attach' in an unprivileged user session
1762 would raise the "Failed to get SE_DEBUG_NAME privilege" warning in
1763 windows_attach(). */
1764 /* AdjustTokenPrivileges returns TRUE even if the privilege could not
1765 be enabled. GetLastError () returns an correct error code, though. */
1766 if (enable
&& GetLastError () == ERROR_NOT_ALL_ASSIGNED
)
1770 ret
= orig_priv
.Privileges
[0].Attributes
== SE_PRIVILEGE_ENABLED
? 1 : 0;
1774 CloseHandle (token_hdl
);
1779 /* Attach to process PID, then initialize for debugging it. */
1781 windows_attach (struct target_ops
*ops
, const char *args
, int from_tty
)
1786 pid
= parse_pid_to_attach (args
);
1788 if (set_process_privilege (SE_DEBUG_NAME
, TRUE
) < 0)
1790 printf_unfiltered ("Warning: Failed to get SE_DEBUG_NAME privilege\n");
1791 printf_unfiltered ("This can cause attach to "
1792 "fail on Windows NT/2K/XP\n");
1795 windows_init_thread_list ();
1796 ok
= DebugActiveProcess (pid
);
1802 /* Try fall back to Cygwin pid. */
1803 pid
= cygwin_internal (CW_CYGWIN_PID_TO_WINPID
, pid
);
1806 ok
= DebugActiveProcess (pid
);
1811 error (_("Can't attach to process."));
1813 DebugSetProcessKillOnExit (FALSE
);
1817 char *exec_file
= (char *) get_exec_file (0);
1820 printf_unfiltered ("Attaching to program `%s', %s\n", exec_file
,
1821 target_pid_to_str (pid_to_ptid (pid
)));
1823 printf_unfiltered ("Attaching to %s\n",
1824 target_pid_to_str (pid_to_ptid (pid
)));
1826 gdb_flush (gdb_stdout
);
1829 do_initial_windows_stuff (ops
, pid
, 1);
1830 target_terminal_ours ();
1834 windows_detach (struct target_ops
*ops
, const char *args
, int from_tty
)
1839 windows_resume (ops
, ptid
, 0, GDB_SIGNAL_0
);
1841 if (!DebugActiveProcessStop (current_event
.dwProcessId
))
1843 error (_("Can't detach process %u (error %u)"),
1844 (unsigned) current_event
.dwProcessId
, (unsigned) GetLastError ());
1847 DebugSetProcessKillOnExit (FALSE
);
1849 if (detached
&& from_tty
)
1851 char *exec_file
= get_exec_file (0);
1854 printf_unfiltered ("Detaching from program: %s, Pid %u\n", exec_file
,
1855 (unsigned) current_event
.dwProcessId
);
1856 gdb_flush (gdb_stdout
);
1859 x86_cleanup_dregs ();
1860 inferior_ptid
= null_ptid
;
1861 detach_inferior (current_event
.dwProcessId
);
1863 inf_child_maybe_unpush_target (ops
);
1866 /* Try to determine the executable filename.
1868 EXE_NAME_RET is a pointer to a buffer whose size is EXE_NAME_MAX_LEN.
1870 Upon success, the filename is stored inside EXE_NAME_RET, and
1871 this function returns nonzero.
1873 Otherwise, this function returns zero and the contents of
1874 EXE_NAME_RET is undefined. */
1877 windows_get_exec_module_filename (char *exe_name_ret
, size_t exe_name_max_len
)
1884 if (!EnumProcessModules (current_process_handle
, &dh_buf
,
1885 sizeof (HMODULE
), &cbNeeded
) || !cbNeeded
)
1888 /* We know the executable is always first in the list of modules,
1889 which we just fetched. So no need to fetch more. */
1893 /* Cygwin prefers that the path be in /x/y/z format, so extract
1894 the filename into a temporary buffer first, and then convert it
1895 to POSIX format into the destination buffer. */
1896 cygwin_buf_t
*pathbuf
= (cygwin_buf_t
*) alloca (exe_name_max_len
* sizeof (cygwin_buf_t
));
1898 len
= GetModuleFileNameEx (current_process_handle
,
1899 dh_buf
, pathbuf
, exe_name_max_len
);
1901 error (_("Error getting executable filename: %u."),
1902 (unsigned) GetLastError ());
1903 if (cygwin_conv_path (CCP_WIN_W_TO_POSIX
, pathbuf
, exe_name_ret
,
1904 exe_name_max_len
) < 0)
1905 error (_("Error converting executable filename to POSIX: %d."), errno
);
1908 len
= GetModuleFileNameEx (current_process_handle
,
1909 dh_buf
, exe_name_ret
, exe_name_max_len
);
1911 error (_("Error getting executable filename: %u."),
1912 (unsigned) GetLastError ());
1915 return 1; /* success */
1918 /* The pid_to_exec_file target_ops method for this platform. */
1921 windows_pid_to_exec_file (struct target_ops
*self
, int pid
)
1923 static char path
[__PMAX
];
1925 /* Try to find exe name as symlink target of /proc/<pid>/exe. */
1927 char procexe
[sizeof ("/proc/4294967295/exe")];
1929 xsnprintf (procexe
, sizeof (procexe
), "/proc/%u/exe", pid
);
1930 nchars
= readlink (procexe
, path
, sizeof(path
));
1931 if (nchars
> 0 && nchars
< sizeof (path
))
1933 path
[nchars
] = '\0'; /* Got it */
1938 /* If we get here then either Cygwin is hosed, this isn't a Cygwin version
1939 of gdb, or we're trying to debug a non-Cygwin windows executable. */
1940 if (!windows_get_exec_module_filename (path
, sizeof (path
)))
1946 /* Print status information about what we're accessing. */
1949 windows_files_info (struct target_ops
*ignore
)
1951 struct inferior
*inf
= current_inferior ();
1953 printf_unfiltered ("\tUsing the running image of %s %s.\n",
1954 inf
->attach_flag
? "attached" : "child",
1955 target_pid_to_str (inferior_ptid
));
1958 /* Modify CreateProcess parameters for use of a new separate console.
1960 *FLAGS: DWORD parameter for general process creation flags.
1961 *SI: STARTUPINFO structure, for which the console window size and
1962 console buffer size is filled in if GDB is running in a console.
1963 to create the new console.
1964 The size of the used font is not available on all versions of
1965 Windows OS. Furthermore, the current font might not be the default
1966 font, but this is still better than before.
1967 If the windows and buffer sizes are computed,
1968 SI->DWFLAGS is changed so that this information is used
1969 by CreateProcess function. */
1972 windows_set_console_info (STARTUPINFO
*si
, DWORD
*flags
)
1974 HANDLE hconsole
= CreateFile ("CONOUT$", GENERIC_READ
| GENERIC_WRITE
,
1975 FILE_SHARE_READ
, NULL
, OPEN_EXISTING
, 0, 0);
1977 if (hconsole
!= INVALID_HANDLE_VALUE
)
1979 CONSOLE_SCREEN_BUFFER_INFO sbinfo
;
1981 CONSOLE_FONT_INFO cfi
;
1983 GetCurrentConsoleFont (hconsole
, FALSE
, &cfi
);
1984 font_size
= GetConsoleFontSize (hconsole
, cfi
.nFont
);
1985 GetConsoleScreenBufferInfo(hconsole
, &sbinfo
);
1986 si
->dwXSize
= sbinfo
.srWindow
.Right
- sbinfo
.srWindow
.Left
+ 1;
1987 si
->dwYSize
= sbinfo
.srWindow
.Bottom
- sbinfo
.srWindow
.Top
+ 1;
1989 si
->dwXSize
*= font_size
.X
;
1993 si
->dwYSize
*= font_size
.Y
;
1996 si
->dwXCountChars
= sbinfo
.dwSize
.X
;
1997 si
->dwYCountChars
= sbinfo
.dwSize
.Y
;
1998 si
->dwFlags
|= STARTF_USESIZE
| STARTF_USECOUNTCHARS
;
2000 *flags
|= CREATE_NEW_CONSOLE
;
2004 /* Function called by qsort to sort environment strings. */
2007 envvar_cmp (const void *a
, const void *b
)
2009 const char **p
= (const char **) a
;
2010 const char **q
= (const char **) b
;
2011 return strcasecmp (*p
, *q
);
2017 clear_win32_environment (char **env
)
2021 wchar_t *copy
= NULL
, *equalpos
;
2023 for (i
= 0; env
[i
] && *env
[i
]; i
++)
2025 len
= mbstowcs (NULL
, env
[i
], 0) + 1;
2026 copy
= (wchar_t *) xrealloc (copy
, len
* sizeof (wchar_t));
2027 mbstowcs (copy
, env
[i
], len
);
2028 equalpos
= wcschr (copy
, L
'=');
2031 SetEnvironmentVariableW (copy
, NULL
);
2037 /* Start an inferior windows child process and sets inferior_ptid to its pid.
2038 EXEC_FILE is the file to run.
2039 ALLARGS is a string containing the arguments to the program.
2040 ENV is the environment vector to pass. Errors reported with error(). */
2043 windows_create_inferior (struct target_ops
*ops
, char *exec_file
,
2044 char *allargs
, char **in_env
, int from_tty
)
2048 cygwin_buf_t real_path
[__PMAX
];
2049 cygwin_buf_t shell
[__PMAX
]; /* Path to shell */
2051 cygwin_buf_t
*toexec
;
2052 cygwin_buf_t
*cygallargs
;
2054 char **old_env
= NULL
;
2058 int ostdin
, ostdout
, ostderr
;
2060 char real_path
[__PMAX
];
2061 char shell
[__PMAX
]; /* Path to shell */
2073 PROCESS_INFORMATION pi
;
2076 const char *inferior_io_terminal
= get_inferior_io_terminal ();
2079 error (_("No executable specified, use `target exec'."));
2081 memset (&si
, 0, sizeof (si
));
2082 si
.cb
= sizeof (si
);
2085 flags
|= CREATE_NEW_PROCESS_GROUP
;
2088 windows_set_console_info (&si
, &flags
);
2093 flags
|= DEBUG_ONLY_THIS_PROCESS
;
2094 if (cygwin_conv_path (CCP_POSIX_TO_WIN_W
, exec_file
, real_path
,
2095 __PMAX
* sizeof (cygwin_buf_t
)) < 0)
2096 error (_("Error starting executable: %d"), errno
);
2099 len
= mbstowcs (NULL
, allargs
, 0) + 1;
2100 if (len
== (size_t) -1)
2101 error (_("Error starting executable: %d"), errno
);
2102 cygallargs
= (wchar_t *) alloca (len
* sizeof (wchar_t));
2103 mbstowcs (cygallargs
, allargs
, len
);
2105 cygallargs
= allargs
;
2110 sh
= getenv ("SHELL");
2113 if (cygwin_conv_path (CCP_POSIX_TO_WIN_W
, sh
, shell
, __PMAX
) < 0)
2114 error (_("Error starting executable via shell: %d"), errno
);
2116 len
= sizeof (L
" -c 'exec '") + mbstowcs (NULL
, exec_file
, 0)
2117 + mbstowcs (NULL
, allargs
, 0) + 2;
2118 cygallargs
= (wchar_t *) alloca (len
* sizeof (wchar_t));
2119 swprintf (cygallargs
, len
, L
" -c 'exec %s %s'", exec_file
, allargs
);
2121 len
= (sizeof (" -c 'exec '") + strlen (exec_file
)
2122 + strlen (allargs
) + 2);
2123 cygallargs
= (char *) alloca (len
);
2124 xsnprintf (cygallargs
, len
, " -c 'exec %s %s'", exec_file
, allargs
);
2127 flags
|= DEBUG_PROCESS
;
2131 args
= (cygwin_buf_t
*) alloca ((wcslen (toexec
) + wcslen (cygallargs
) + 2)
2132 * sizeof (wchar_t));
2133 wcscpy (args
, toexec
);
2134 wcscat (args
, L
" ");
2135 wcscat (args
, cygallargs
);
2137 args
= (cygwin_buf_t
*) alloca (strlen (toexec
) + strlen (cygallargs
) + 2);
2138 strcpy (args
, toexec
);
2140 strcat (args
, cygallargs
);
2143 #ifdef CW_CVT_ENV_TO_WINENV
2144 /* First try to create a direct Win32 copy of the POSIX environment. */
2145 w32_env
= (PWCHAR
) cygwin_internal (CW_CVT_ENV_TO_WINENV
, in_env
);
2146 if (w32_env
!= (PWCHAR
) -1)
2147 flags
|= CREATE_UNICODE_ENVIRONMENT
;
2149 /* If that fails, fall back to old method tweaking GDB's environment. */
2152 /* Reset all Win32 environment variables to avoid leftover on next run. */
2153 clear_win32_environment (environ
);
2154 /* Prepare the environment vars for CreateProcess. */
2157 cygwin_internal (CW_SYNC_WINENV
);
2161 if (!inferior_io_terminal
)
2162 tty
= ostdin
= ostdout
= ostderr
= -1;
2165 tty
= open (inferior_io_terminal
, O_RDWR
| O_NOCTTY
);
2168 print_sys_errmsg (inferior_io_terminal
, errno
);
2169 ostdin
= ostdout
= ostderr
= -1;
2182 windows_init_thread_list ();
2183 ret
= CreateProcess (0,
2184 args
, /* command line */
2185 NULL
, /* Security */
2187 TRUE
, /* inherit handles */
2188 flags
, /* start flags */
2189 w32_env
, /* environment */
2190 NULL
, /* current directory */
2194 /* Just free the Win32 environment, if it could be created. */
2198 /* Reset all environment variables to avoid leftover on next run. */
2199 clear_win32_environment (in_env
);
2200 /* Restore normal GDB environment variables. */
2202 cygwin_internal (CW_SYNC_WINENV
);
2217 /* Build the command line, a space-separated list of tokens where
2218 the first token is the name of the module to be executed.
2219 To avoid ambiguities introduced by spaces in the module name,
2221 args_len
= strlen (toexec
) + 2 /* quotes */ + strlen (allargs
) + 2;
2222 args
= (char *) alloca (args_len
);
2223 xsnprintf (args
, args_len
, "\"%s\" %s", toexec
, allargs
);
2225 flags
|= DEBUG_ONLY_THIS_PROCESS
;
2227 if (!inferior_io_terminal
)
2228 tty
= INVALID_HANDLE_VALUE
;
2231 SECURITY_ATTRIBUTES sa
;
2232 sa
.nLength
= sizeof(sa
);
2233 sa
.lpSecurityDescriptor
= 0;
2234 sa
.bInheritHandle
= TRUE
;
2235 tty
= CreateFileA (inferior_io_terminal
, GENERIC_READ
| GENERIC_WRITE
,
2236 0, &sa
, OPEN_EXISTING
, FILE_ATTRIBUTE_NORMAL
, 0);
2237 if (tty
== INVALID_HANDLE_VALUE
)
2238 warning (_("Warning: Failed to open TTY %s, error %#x."),
2239 inferior_io_terminal
, (unsigned) GetLastError ());
2243 si
.hStdOutput
= tty
;
2245 si
.dwFlags
|= STARTF_USESTDHANDLES
;
2249 /* CreateProcess takes the environment list as a null terminated set of
2250 strings (i.e. two nulls terminate the list). */
2252 /* Get total size for env strings. */
2253 for (envlen
= 0, i
= 0; in_env
[i
] && *in_env
[i
]; i
++)
2254 envlen
+= strlen (in_env
[i
]) + 1;
2256 envsize
= sizeof (in_env
[0]) * (i
+ 1);
2257 env
= (char **) alloca (envsize
);
2258 memcpy (env
, in_env
, envsize
);
2259 /* Windows programs expect the environment block to be sorted. */
2260 qsort (env
, i
, sizeof (char *), envvar_cmp
);
2262 w32env
= (char *) alloca (envlen
+ 1);
2264 /* Copy env strings into new buffer. */
2265 for (temp
= w32env
, i
= 0; env
[i
] && *env
[i
]; i
++)
2267 strcpy (temp
, env
[i
]);
2268 temp
+= strlen (temp
) + 1;
2271 /* Final nil string to terminate new env. */
2274 windows_init_thread_list ();
2275 ret
= CreateProcessA (0,
2276 args
, /* command line */
2277 NULL
, /* Security */
2279 TRUE
, /* inherit handles */
2280 flags
, /* start flags */
2281 w32env
, /* environment */
2282 NULL
, /* current directory */
2285 if (tty
!= INVALID_HANDLE_VALUE
)
2290 error (_("Error creating process %s, (error %u)."),
2291 exec_file
, (unsigned) GetLastError ());
2293 CloseHandle (pi
.hThread
);
2294 CloseHandle (pi
.hProcess
);
2296 if (useshell
&& shell
[0] != '\0')
2301 do_initial_windows_stuff (ops
, pi
.dwProcessId
, 0);
2303 /* windows_continue (DBG_CONTINUE, -1, 0); */
2307 windows_mourn_inferior (struct target_ops
*ops
)
2309 (void) windows_continue (DBG_CONTINUE
, -1, 0);
2310 x86_cleanup_dregs();
2311 if (open_process_used
)
2313 CHECK (CloseHandle (current_process_handle
));
2314 open_process_used
= 0;
2316 inf_child_mourn_inferior (ops
);
2319 /* Send a SIGINT to the process group. This acts just like the user typed a
2320 ^C on the controlling terminal. */
2323 windows_interrupt (struct target_ops
*self
, ptid_t ptid
)
2325 DEBUG_EVENTS (("gdb: GenerateConsoleCtrlEvent (CTRLC_EVENT, 0)\n"));
2326 CHECK (GenerateConsoleCtrlEvent (CTRL_C_EVENT
, current_event
.dwProcessId
));
2327 registers_changed (); /* refresh register state */
2330 /* Helper for windows_xfer_partial that handles memory transfers.
2331 Arguments are like target_xfer_partial. */
2333 static enum target_xfer_status
2334 windows_xfer_memory (gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
2335 ULONGEST memaddr
, ULONGEST len
, ULONGEST
*xfered_len
)
2339 DWORD lasterror
= 0;
2341 if (writebuf
!= NULL
)
2343 DEBUG_MEM (("gdb: write target memory, %s bytes at %s\n",
2344 pulongest (len
), core_addr_to_string (memaddr
)));
2345 success
= WriteProcessMemory (current_process_handle
,
2346 (LPVOID
) (uintptr_t) memaddr
, writebuf
,
2349 lasterror
= GetLastError ();
2350 FlushInstructionCache (current_process_handle
,
2351 (LPCVOID
) (uintptr_t) memaddr
, len
);
2355 DEBUG_MEM (("gdb: read target memory, %s bytes at %s\n",
2356 pulongest (len
), core_addr_to_string (memaddr
)));
2357 success
= ReadProcessMemory (current_process_handle
,
2358 (LPCVOID
) (uintptr_t) memaddr
, readbuf
,
2361 lasterror
= GetLastError ();
2363 *xfered_len
= (ULONGEST
) done
;
2364 if (!success
&& lasterror
== ERROR_PARTIAL_COPY
&& done
> 0)
2365 return TARGET_XFER_OK
;
2367 return success
? TARGET_XFER_OK
: TARGET_XFER_E_IO
;
2371 windows_kill_inferior (struct target_ops
*ops
)
2373 CHECK (TerminateProcess (current_process_handle
, 0));
2377 if (!windows_continue (DBG_CONTINUE
, -1, 1))
2379 if (!WaitForDebugEvent (¤t_event
, INFINITE
))
2381 if (current_event
.dwDebugEventCode
== EXIT_PROCESS_DEBUG_EVENT
)
2385 target_mourn_inferior (); /* Or just windows_mourn_inferior? */
2389 windows_close (struct target_ops
*self
)
2391 DEBUG_EVENTS (("gdb: windows_close, inferior_ptid=%d\n",
2392 ptid_get_pid (inferior_ptid
)));
2395 /* Convert pid to printable format. */
2397 windows_pid_to_str (struct target_ops
*ops
, ptid_t ptid
)
2399 static char buf
[80];
2401 if (ptid_get_tid (ptid
) != 0)
2403 snprintf (buf
, sizeof (buf
), "Thread %d.0x%lx",
2404 ptid_get_pid (ptid
), ptid_get_tid (ptid
));
2408 return normal_pid_to_str (ptid
);
2411 static enum target_xfer_status
2412 windows_xfer_shared_libraries (struct target_ops
*ops
,
2413 enum target_object object
, const char *annex
,
2414 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
2415 ULONGEST offset
, ULONGEST len
,
2416 ULONGEST
*xfered_len
)
2418 struct obstack obstack
;
2424 return TARGET_XFER_E_IO
;
2426 obstack_init (&obstack
);
2427 obstack_grow_str (&obstack
, "<library-list>\n");
2428 for (so
= solib_start
.next
; so
; so
= so
->next
)
2429 windows_xfer_shared_library (so
->so_name
, (CORE_ADDR
)
2430 (uintptr_t) so
->lm_info
->load_addr
,
2431 target_gdbarch (), &obstack
);
2432 obstack_grow_str0 (&obstack
, "</library-list>\n");
2434 buf
= (const char *) obstack_finish (&obstack
);
2435 len_avail
= strlen (buf
);
2436 if (offset
>= len_avail
)
2440 if (len
> len_avail
- offset
)
2441 len
= len_avail
- offset
;
2442 memcpy (readbuf
, buf
+ offset
, len
);
2445 obstack_free (&obstack
, NULL
);
2446 *xfered_len
= (ULONGEST
) len
;
2447 return len
!= 0 ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
2450 static enum target_xfer_status
2451 windows_xfer_partial (struct target_ops
*ops
, enum target_object object
,
2452 const char *annex
, gdb_byte
*readbuf
,
2453 const gdb_byte
*writebuf
, ULONGEST offset
, ULONGEST len
,
2454 ULONGEST
*xfered_len
)
2458 case TARGET_OBJECT_MEMORY
:
2459 return windows_xfer_memory (readbuf
, writebuf
, offset
, len
, xfered_len
);
2461 case TARGET_OBJECT_LIBRARIES
:
2462 return windows_xfer_shared_libraries (ops
, object
, annex
, readbuf
,
2463 writebuf
, offset
, len
, xfered_len
);
2466 return ops
->beneath
->to_xfer_partial (ops
->beneath
, object
, annex
,
2467 readbuf
, writebuf
, offset
, len
,
2472 /* Provide thread local base, i.e. Thread Information Block address.
2473 Returns 1 if ptid is found and sets *ADDR to thread_local_base. */
2476 windows_get_tib_address (struct target_ops
*self
,
2477 ptid_t ptid
, CORE_ADDR
*addr
)
2479 windows_thread_info
*th
;
2481 th
= thread_rec (ptid_get_tid (ptid
), 0);
2486 *addr
= th
->thread_local_base
;
2492 windows_get_ada_task_ptid (struct target_ops
*self
, long lwp
, long thread
)
2494 return ptid_build (ptid_get_pid (inferior_ptid
), 0, lwp
);
2497 static struct target_ops
*
2498 windows_target (void)
2500 struct target_ops
*t
= inf_child_target ();
2502 t
->to_close
= windows_close
;
2503 t
->to_attach
= windows_attach
;
2504 t
->to_attach_no_wait
= 1;
2505 t
->to_detach
= windows_detach
;
2506 t
->to_resume
= windows_resume
;
2507 t
->to_wait
= windows_wait
;
2508 t
->to_fetch_registers
= windows_fetch_inferior_registers
;
2509 t
->to_store_registers
= windows_store_inferior_registers
;
2510 t
->to_xfer_partial
= windows_xfer_partial
;
2511 t
->to_files_info
= windows_files_info
;
2512 t
->to_kill
= windows_kill_inferior
;
2513 t
->to_create_inferior
= windows_create_inferior
;
2514 t
->to_mourn_inferior
= windows_mourn_inferior
;
2515 t
->to_thread_alive
= windows_thread_alive
;
2516 t
->to_pid_to_str
= windows_pid_to_str
;
2517 t
->to_interrupt
= windows_interrupt
;
2518 t
->to_pid_to_exec_file
= windows_pid_to_exec_file
;
2519 t
->to_get_ada_task_ptid
= windows_get_ada_task_ptid
;
2520 t
->to_get_tib_address
= windows_get_tib_address
;
2525 /* -Wmissing-prototypes */
2526 extern initialize_file_ftype _initialize_windows_nat
;
2529 _initialize_windows_nat (void)
2531 struct target_ops
*t
;
2533 t
= windows_target ();
2535 x86_use_watchpoints (t
);
2537 x86_dr_low
.set_control
= cygwin_set_dr7
;
2538 x86_dr_low
.set_addr
= cygwin_set_dr
;
2539 x86_dr_low
.get_addr
= cygwin_get_dr
;
2540 x86_dr_low
.get_status
= cygwin_get_dr6
;
2541 x86_dr_low
.get_control
= cygwin_get_dr7
;
2543 /* x86_dr_low.debug_register_length field is set by
2544 calling x86_set_debug_register_length function
2545 in processor windows specific native file. */
2550 cygwin_internal (CW_SET_DOS_FILE_WARNING
, 0);
2554 add_setshow_boolean_cmd ("shell", class_support
, &useshell
, _("\
2555 Set use of shell to start subprocess."), _("\
2556 Show use of shell to start subprocess."), NULL
,
2558 NULL
, /* FIXME: i18n: */
2559 &setlist
, &showlist
);
2561 add_setshow_boolean_cmd ("cygwin-exceptions", class_support
,
2562 &cygwin_exceptions
, _("\
2563 Break when an exception is detected in the Cygwin DLL itself."), _("\
2564 Show whether gdb breaks on exceptions in the Cygwin DLL itself."), NULL
,
2566 NULL
, /* FIXME: i18n: */
2567 &setlist
, &showlist
);
2570 add_setshow_boolean_cmd ("new-console", class_support
, &new_console
, _("\
2571 Set creation of new console when creating child process."), _("\
2572 Show creation of new console when creating child process."), NULL
,
2574 NULL
, /* FIXME: i18n: */
2575 &setlist
, &showlist
);
2577 add_setshow_boolean_cmd ("new-group", class_support
, &new_group
, _("\
2578 Set creation of new group when creating child process."), _("\
2579 Show creation of new group when creating child process."), NULL
,
2581 NULL
, /* FIXME: i18n: */
2582 &setlist
, &showlist
);
2584 add_setshow_boolean_cmd ("debugexec", class_support
, &debug_exec
, _("\
2585 Set whether to display execution in child process."), _("\
2586 Show whether to display execution in child process."), NULL
,
2588 NULL
, /* FIXME: i18n: */
2589 &setlist
, &showlist
);
2591 add_setshow_boolean_cmd ("debugevents", class_support
, &debug_events
, _("\
2592 Set whether to display kernel events in child process."), _("\
2593 Show whether to display kernel events in child process."), NULL
,
2595 NULL
, /* FIXME: i18n: */
2596 &setlist
, &showlist
);
2598 add_setshow_boolean_cmd ("debugmemory", class_support
, &debug_memory
, _("\
2599 Set whether to display memory accesses in child process."), _("\
2600 Show whether to display memory accesses in child process."), NULL
,
2602 NULL
, /* FIXME: i18n: */
2603 &setlist
, &showlist
);
2605 add_setshow_boolean_cmd ("debugexceptions", class_support
,
2606 &debug_exceptions
, _("\
2607 Set whether to display kernel exceptions in child process."), _("\
2608 Show whether to display kernel exceptions in child process."), NULL
,
2610 NULL
, /* FIXME: i18n: */
2611 &setlist
, &showlist
);
2613 init_w32_command_list ();
2615 add_cmd ("selector", class_info
, display_selectors
,
2616 _("Display selectors infos."),
2620 /* Hardware watchpoint support, adapted from go32-nat.c code. */
2622 /* Pass the address ADDR to the inferior in the I'th debug register.
2623 Here we just store the address in dr array, the registers will be
2624 actually set up when windows_continue is called. */
2626 cygwin_set_dr (int i
, CORE_ADDR addr
)
2629 internal_error (__FILE__
, __LINE__
,
2630 _("Invalid register %d in cygwin_set_dr.\n"), i
);
2632 debug_registers_changed
= 1;
2633 debug_registers_used
= 1;
2636 /* Pass the value VAL to the inferior in the DR7 debug control
2637 register. Here we just store the address in D_REGS, the watchpoint
2638 will be actually set up in windows_wait. */
2640 cygwin_set_dr7 (unsigned long val
)
2642 dr
[7] = (CORE_ADDR
) val
;
2643 debug_registers_changed
= 1;
2644 debug_registers_used
= 1;
2647 /* Get the value of debug register I from the inferior. */
2650 cygwin_get_dr (int i
)
2655 /* Get the value of the DR6 debug status register from the inferior.
2656 Here we just return the value stored in dr[6]
2657 by the last call to thread_rec for current_event.dwThreadId id. */
2658 static unsigned long
2659 cygwin_get_dr6 (void)
2661 return (unsigned long) dr
[6];
2664 /* Get the value of the DR7 debug status register from the inferior.
2665 Here we just return the value stored in dr[7] by the last call to
2666 thread_rec for current_event.dwThreadId id. */
2668 static unsigned long
2669 cygwin_get_dr7 (void)
2671 return (unsigned long) dr
[7];
2674 /* Determine if the thread referenced by "ptid" is alive
2675 by "polling" it. If WaitForSingleObject returns WAIT_OBJECT_0
2676 it means that the thread has died. Otherwise it is assumed to be alive. */
2678 windows_thread_alive (struct target_ops
*ops
, ptid_t ptid
)
2682 gdb_assert (ptid_get_tid (ptid
) != 0);
2683 tid
= ptid_get_tid (ptid
);
2685 return WaitForSingleObject (thread_rec (tid
, FALSE
)->h
, 0) == WAIT_OBJECT_0
2689 /* -Wmissing-prototypes */
2690 extern initialize_file_ftype _initialize_check_for_gdb_ini
;
2693 _initialize_check_for_gdb_ini (void)
2696 if (inhibit_gdbinit
)
2699 homedir
= getenv ("HOME");
2703 char *oldini
= (char *) alloca (strlen (homedir
) +
2704 sizeof ("gdb.ini") + 1);
2705 strcpy (oldini
, homedir
);
2706 p
= strchr (oldini
, '\0');
2707 if (p
> oldini
&& !IS_DIR_SEPARATOR (p
[-1]))
2709 strcpy (p
, "gdb.ini");
2710 if (access (oldini
, 0) == 0)
2712 int len
= strlen (oldini
);
2713 char *newini
= (char *) alloca (len
+ 2);
2715 xsnprintf (newini
, len
+ 2, "%.*s.gdbinit",
2716 (int) (len
- (sizeof ("gdb.ini") - 1)), oldini
);
2717 warning (_("obsolete '%s' found. Rename to '%s'."), oldini
, newini
);
2722 /* Define dummy functions which always return error for the rare cases where
2723 these functions could not be found. */
2725 bad_DebugActiveProcessStop (DWORD w
)
2730 bad_DebugBreakProcess (HANDLE w
)
2735 bad_DebugSetProcessKillOnExit (BOOL w
)
2740 bad_EnumProcessModules (HANDLE w
, HMODULE
*x
, DWORD y
, LPDWORD z
)
2747 bad_GetModuleFileNameExW (HANDLE w
, HMODULE x
, LPWSTR y
, DWORD z
)
2753 bad_GetModuleFileNameExA (HANDLE w
, HMODULE x
, LPSTR y
, DWORD z
)
2760 bad_GetModuleInformation (HANDLE w
, HMODULE x
, LPMODULEINFO y
, DWORD z
)
2766 bad_OpenProcessToken (HANDLE w
, DWORD x
, PHANDLE y
)
2772 bad_GetCurrentConsoleFont (HANDLE w
, BOOL bMaxWindow
, CONSOLE_FONT_INFO
*f
)
2778 bad_GetConsoleFontSize (HANDLE w
, DWORD nFont
)
2786 /* -Wmissing-prototypes */
2787 extern initialize_file_ftype _initialize_loadable
;
2789 /* Load any functions which may not be available in ancient versions
2793 _initialize_loadable (void)
2797 #define GPA(m, func) \
2798 func = (func ## _ftype *) GetProcAddress (m, #func)
2800 hm
= LoadLibrary ("kernel32.dll");
2803 GPA (hm
, DebugActiveProcessStop
);
2804 GPA (hm
, DebugBreakProcess
);
2805 GPA (hm
, DebugSetProcessKillOnExit
);
2806 GPA (hm
, GetConsoleFontSize
);
2807 GPA (hm
, DebugActiveProcessStop
);
2808 GPA (hm
, GetCurrentConsoleFont
);
2811 /* Set variables to dummy versions of these processes if the function
2812 wasn't found in kernel32.dll. */
2813 if (!DebugBreakProcess
)
2814 DebugBreakProcess
= bad_DebugBreakProcess
;
2815 if (!DebugActiveProcessStop
|| !DebugSetProcessKillOnExit
)
2817 DebugActiveProcessStop
= bad_DebugActiveProcessStop
;
2818 DebugSetProcessKillOnExit
= bad_DebugSetProcessKillOnExit
;
2820 if (!GetConsoleFontSize
)
2821 GetConsoleFontSize
= bad_GetConsoleFontSize
;
2822 if (!GetCurrentConsoleFont
)
2823 GetCurrentConsoleFont
= bad_GetCurrentConsoleFont
;
2825 /* Load optional functions used for retrieving filename information
2826 associated with the currently debugged process or its dlls. */
2827 hm
= LoadLibrary ("psapi.dll");
2830 GPA (hm
, EnumProcessModules
);
2831 GPA (hm
, GetModuleInformation
);
2832 GetModuleFileNameEx
= (GetModuleFileNameEx_ftype
*)
2833 GetProcAddress (hm
, GetModuleFileNameEx_name
);
2836 if (!EnumProcessModules
|| !GetModuleInformation
|| !GetModuleFileNameEx
)
2838 /* Set variables to dummy versions of these processes if the function
2839 wasn't found in psapi.dll. */
2840 EnumProcessModules
= bad_EnumProcessModules
;
2841 GetModuleInformation
= bad_GetModuleInformation
;
2842 GetModuleFileNameEx
= bad_GetModuleFileNameEx
;
2843 /* This will probably fail on Windows 9x/Me. Let the user know
2844 that we're missing some functionality. */
2846 cannot automatically find executable file or library to read symbols.\n\
2847 Use \"file\" or \"dll\" command to load executable/libraries directly."));
2850 hm
= LoadLibrary ("advapi32.dll");
2853 GPA (hm
, OpenProcessToken
);
2854 GPA (hm
, LookupPrivilegeValueA
);
2855 GPA (hm
, AdjustTokenPrivileges
);
2856 /* Only need to set one of these since if OpenProcessToken fails nothing
2858 if (!OpenProcessToken
|| !LookupPrivilegeValueA
2859 || !AdjustTokenPrivileges
)
2860 OpenProcessToken
= bad_OpenProcessToken
;