1 /* Target-vector operations for controlling windows child processes, for GDB.
3 Copyright (C) 1995-2022 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>
41 #include <sys/cygwin.h>
42 #include <cygwin/version.h>
47 #include "filenames.h"
51 #include "gdbsupport/gdb_obstack.h"
52 #include "gdbthread.h"
58 #include "xml-support.h"
61 #include "i386-tdep.h"
62 #include "i387-tdep.h"
64 #include "windows-tdep.h"
65 #include "windows-nat.h"
67 #include "complaints.h"
68 #include "inf-child.h"
69 #include "gdbsupport/gdb_tilde_expand.h"
70 #include "gdbsupport/pathstuff.h"
71 #include "gdbsupport/gdb_wait.h"
72 #include "nat/windows-nat.h"
73 #include "gdbsupport/symbol.h"
75 using namespace windows_nat
;
79 #undef GetModuleFileNameEx
82 # define __PMAX (MAX_PATH + 1)
83 # define GetModuleFileNameEx GetModuleFileNameExA
84 # define STARTUPINFO STARTUPINFOA
85 # define CreateProcess CreateProcessA
87 # define __PMAX PATH_MAX
88 /* The starting and ending address of the cygwin1.dll text segment. */
89 static CORE_ADDR cygwin_load_start
;
90 static CORE_ADDR cygwin_load_end
;
92 typedef wchar_t cygwin_buf_t
;
93 # define GetModuleFileNameEx GetModuleFileNameExW
94 # define STARTUPINFO STARTUPINFOW
95 # define CreateProcess CreateProcessW
98 static int have_saved_context
; /* True if we've saved context from a
101 static CONTEXT saved_context
; /* Contains the saved context from a
105 /* If we're not using the old Cygwin header file set, define the
106 following which never should have been in the generic Win32 API
107 headers in the first place since they were our own invention... */
108 #ifndef _GNU_H_WINDOWS_H
111 FLAG_TRACE_BIT
= 0x100,
115 #ifndef CONTEXT_EXTENDED_REGISTERS
116 /* This macro is only defined on ia32. It only makes sense on this target,
117 so define it as zero if not already defined. */
118 #define CONTEXT_EXTENDED_REGISTERS 0
121 #define CONTEXT_DEBUGGER_DR CONTEXT_FULL | CONTEXT_FLOATING_POINT \
122 | CONTEXT_SEGMENTS | CONTEXT_DEBUG_REGISTERS \
123 | CONTEXT_EXTENDED_REGISTERS
125 static uintptr_t dr
[8];
127 static int windows_initialization_done
;
128 #define DR6_CLEAR_VALUE 0xffff0ff0
130 /* The string sent by cygwin when it processes a signal.
131 FIXME: This should be in a cygwin include file. */
132 #ifndef _CYGWIN_SIGNAL_STRING
133 #define _CYGWIN_SIGNAL_STRING "cYgSiGw00f"
136 #define CHECK(x) check (x, __FILE__,__LINE__)
137 #define DEBUG_EXEC(fmt, ...) \
138 debug_prefixed_printf_cond (debug_exec, "windows exec", fmt, ## __VA_ARGS__)
139 #define DEBUG_EVENTS(fmt, ...) \
140 debug_prefixed_printf_cond (debug_events, "windows events", fmt, \
142 #define DEBUG_MEM(fmt, ...) \
143 debug_prefixed_printf_cond (debug_memory, "windows mem", fmt, \
145 #define DEBUG_EXCEPT(fmt, ...) \
146 debug_prefixed_printf_cond (debug_exceptions, "windows except", fmt, \
149 static void cygwin_set_dr (int i
, CORE_ADDR addr
);
150 static void cygwin_set_dr7 (unsigned long val
);
151 static CORE_ADDR
cygwin_get_dr (int i
);
152 static unsigned long cygwin_get_dr6 (void);
153 static unsigned long cygwin_get_dr7 (void);
155 static std::vector
<windows_thread_info
*> thread_list
;
157 /* Counts of things. */
158 static int saw_create
;
159 static int open_process_used
= 0;
161 static void *wow64_dbgbreak
;
165 static bool new_console
= false;
167 static bool cygwin_exceptions
= false;
169 static bool new_group
= true;
170 static bool debug_exec
= false; /* show execution */
171 static bool debug_events
= false; /* show events from kernel */
172 static bool debug_memory
= false; /* show target memory accesses */
173 static bool debug_exceptions
= false; /* show target exceptions */
174 static bool useshell
= false; /* use shell for subprocesses */
176 /* This vector maps GDB's idea of a register's number into an offset
177 in the windows exception context vector.
179 It also contains the bit mask needed to load the register in question.
181 The contents of this table can only be computed by the units
182 that provide CPU-specific support for Windows native debugging.
183 These units should set the table by calling
184 windows_set_context_register_offsets.
186 One day we could read a reg, we could inspect the context we
187 already have loaded, if it doesn't have the bit set that we need,
188 we read that set of registers in using GetThreadContext. If the
189 context already contains what we need, we just unpack it. Then to
190 write a register, first we have to ensure that the context contains
191 the other regs of the group, and then we copy the info in and set
194 static const int *mappings
;
196 /* The function to use in order to determine whether a register is
197 a segment register or not. */
198 static segment_register_p_ftype
*segment_register_p
;
200 /* See windows_nat_target::resume to understand why this is commented
203 /* This vector maps the target's idea of an exception (extracted
204 from the DEBUG_EVENT structure) to GDB's idea. */
206 struct xlate_exception
212 static const struct xlate_exception xlate
[] =
214 {EXCEPTION_ACCESS_VIOLATION
, GDB_SIGNAL_SEGV
},
215 {STATUS_STACK_OVERFLOW
, GDB_SIGNAL_SEGV
},
216 {EXCEPTION_BREAKPOINT
, GDB_SIGNAL_TRAP
},
217 {DBG_CONTROL_C
, GDB_SIGNAL_INT
},
218 {EXCEPTION_SINGLE_STEP
, GDB_SIGNAL_TRAP
},
219 {STATUS_FLOAT_DIVIDE_BY_ZERO
, GDB_SIGNAL_FPE
}
224 struct windows_nat_target final
: public x86_nat_target
<inf_child_target
>
226 void close () override
;
228 void attach (const char *, int) override
;
230 bool attach_no_wait () override
233 void detach (inferior
*, int) override
;
235 void resume (ptid_t
, int , enum gdb_signal
) override
;
237 ptid_t
wait (ptid_t
, struct target_waitstatus
*, target_wait_flags
) override
;
239 void fetch_registers (struct regcache
*, int) override
;
240 void store_registers (struct regcache
*, int) override
;
242 bool stopped_by_sw_breakpoint () override
244 windows_thread_info
*th
245 = thread_rec (inferior_ptid
, DONT_INVALIDATE_CONTEXT
);
246 return th
->stopped_at_software_breakpoint
;
249 bool supports_stopped_by_sw_breakpoint () override
254 enum target_xfer_status
xfer_partial (enum target_object object
,
257 const gdb_byte
*writebuf
,
258 ULONGEST offset
, ULONGEST len
,
259 ULONGEST
*xfered_len
) override
;
261 void files_info () override
;
263 void kill () override
;
265 void create_inferior (const char *, const std::string
&,
266 char **, int) override
;
268 void mourn_inferior () override
;
270 bool thread_alive (ptid_t ptid
) override
;
272 std::string
pid_to_str (ptid_t
) override
;
274 void interrupt () override
;
276 char *pid_to_exec_file (int pid
) override
;
278 ptid_t
get_ada_task_ptid (long lwp
, ULONGEST thread
) override
;
280 bool get_tib_address (ptid_t ptid
, CORE_ADDR
*addr
) override
;
282 const char *thread_name (struct thread_info
*) override
;
284 int get_windows_debug_event (int pid
, struct target_waitstatus
*ourstatus
);
286 void do_initial_windows_stuff (DWORD pid
, bool attaching
);
289 static windows_nat_target the_windows_nat_target
;
291 /* Set the MAPPINGS static global to OFFSETS.
292 See the description of MAPPINGS for more details. */
295 windows_set_context_register_offsets (const int *offsets
)
300 /* Set the function that should be used by this module to determine
301 whether a given register is a segment register or not. */
304 windows_set_segment_register_p (segment_register_p_ftype
*fun
)
306 segment_register_p
= fun
;
310 check (BOOL ok
, const char *file
, int line
)
313 printf_filtered ("error return %s:%d was %u\n", file
, line
,
314 (unsigned) GetLastError ());
317 /* See nat/windows-nat.h. */
319 windows_thread_info
*
320 windows_nat::thread_rec (ptid_t ptid
, thread_disposition_type disposition
)
322 for (windows_thread_info
*th
: thread_list
)
323 if (th
->tid
== ptid
.lwp ())
329 case DONT_INVALIDATE_CONTEXT
:
332 case INVALIDATE_CONTEXT
:
333 if (ptid
.lwp () != current_event
.dwThreadId
)
335 th
->reload_context
= true;
338 th
->reload_context
= true;
349 /* Add a thread to the thread list.
351 PTID is the ptid of the thread to be added.
352 H is its Windows handle.
353 TLB is its thread local base.
354 MAIN_THREAD_P should be true if the thread to be added is
355 the main thread, false otherwise. */
357 static windows_thread_info
*
358 windows_add_thread (ptid_t ptid
, HANDLE h
, void *tlb
, bool main_thread_p
)
360 windows_thread_info
*th
;
362 gdb_assert (ptid
.lwp () != 0);
364 if ((th
= thread_rec (ptid
, DONT_INVALIDATE_CONTEXT
)))
367 CORE_ADDR base
= (CORE_ADDR
) (uintptr_t) tlb
;
369 /* For WOW64 processes, this is actually the pointer to the 64bit TIB,
370 and the 32bit TIB is exactly 2 pages after it. */
374 th
= new windows_thread_info (ptid
.lwp (), h
, base
);
375 thread_list
.push_back (th
);
377 /* Add this new thread to the list of threads.
379 To be consistent with what's done on other platforms, we add
380 the main thread silently (in reality, this thread is really
381 more of a process to the user than a thread). */
383 add_thread_silent (&the_windows_nat_target
, ptid
);
385 add_thread (&the_windows_nat_target
, ptid
);
387 /* It's simplest to always set this and update the debug
389 th
->debug_registers_changed
= true;
394 /* Clear out any old thread list and reinitialize it to a
397 windows_init_thread_list (void)
399 DEBUG_EVENTS ("called");
402 for (windows_thread_info
*here
: thread_list
)
405 thread_list
.clear ();
408 /* Delete a thread from the list of threads.
410 PTID is the ptid of the thread to be deleted.
411 EXIT_CODE is the thread's exit code.
412 MAIN_THREAD_P should be true if the thread to be deleted is
413 the main thread, false otherwise. */
416 windows_delete_thread (ptid_t ptid
, DWORD exit_code
, bool main_thread_p
)
420 gdb_assert (ptid
.lwp () != 0);
424 /* Emit a notification about the thread being deleted.
426 Note that no notification was printed when the main thread
427 was created, and thus, unless in verbose mode, we should be
428 symmetrical, and avoid that notification for the main thread
432 printf_unfiltered ("[Deleting %s]\n", target_pid_to_str (ptid
).c_str ());
433 else if (print_thread_events
&& !main_thread_p
)
434 printf_unfiltered (_("[%s exited with code %u]\n"),
435 target_pid_to_str (ptid
).c_str (),
436 (unsigned) exit_code
);
438 delete_thread (find_thread_ptid (&the_windows_nat_target
, ptid
));
440 auto iter
= std::find_if (thread_list
.begin (), thread_list
.end (),
441 [=] (windows_thread_info
*th
)
443 return th
->tid
== id
;
446 if (iter
!= thread_list
.end ())
449 thread_list
.erase (iter
);
453 /* Fetches register number R from the given windows_thread_info,
454 and supplies its value to the given regcache.
456 This function assumes that R is non-negative. A failed assertion
457 is raised if that is not true.
459 This function assumes that TH->RELOAD_CONTEXT is not set, meaning
460 that the windows_thread_info has an up-to-date context. A failed
461 assertion is raised if that assumption is violated. */
464 windows_fetch_one_register (struct regcache
*regcache
,
465 windows_thread_info
*th
, int r
)
468 gdb_assert (!th
->reload_context
);
470 char *context_ptr
= (char *) &th
->context
;
473 context_ptr
= (char *) &th
->wow64_context
;
476 char *context_offset
= context_ptr
+ mappings
[r
];
477 struct gdbarch
*gdbarch
= regcache
->arch ();
478 i386_gdbarch_tdep
*tdep
= (i386_gdbarch_tdep
*) gdbarch_tdep (gdbarch
);
480 gdb_assert (!gdbarch_read_pc_p (gdbarch
));
481 gdb_assert (gdbarch_pc_regnum (gdbarch
) >= 0);
482 gdb_assert (!gdbarch_write_pc_p (gdbarch
));
484 if (r
== I387_FISEG_REGNUM (tdep
))
486 long l
= *((long *) context_offset
) & 0xffff;
487 regcache
->raw_supply (r
, (char *) &l
);
489 else if (r
== I387_FOP_REGNUM (tdep
))
491 long l
= (*((long *) context_offset
) >> 16) & ((1 << 11) - 1);
492 regcache
->raw_supply (r
, (char *) &l
);
494 else if (segment_register_p (r
))
496 /* GDB treats segment registers as 32bit registers, but they are
497 in fact only 16 bits long. Make sure we do not read extra
498 bits from our source buffer. */
499 long l
= *((long *) context_offset
) & 0xffff;
500 regcache
->raw_supply (r
, (char *) &l
);
504 if (th
->stopped_at_software_breakpoint
506 && r
== gdbarch_pc_regnum (gdbarch
))
508 int size
= register_size (gdbarch
, r
);
512 memcpy (&value
, context_offset
, size
);
513 value
-= gdbarch_decr_pc_after_break (gdbarch
);
514 memcpy (context_offset
, &value
, size
);
518 gdb_assert (size
== 8);
520 memcpy (&value
, context_offset
, size
);
521 value
-= gdbarch_decr_pc_after_break (gdbarch
);
522 memcpy (context_offset
, &value
, size
);
524 /* Make sure we only rewrite the PC a single time. */
525 th
->pc_adjusted
= true;
527 regcache
->raw_supply (r
, context_offset
);
532 windows_nat_target::fetch_registers (struct regcache
*regcache
, int r
)
534 windows_thread_info
*th
= thread_rec (regcache
->ptid (), INVALIDATE_CONTEXT
);
536 /* Check if TH exists. Windows sometimes uses a non-existent
537 thread id in its events. */
541 if (th
->reload_context
)
544 if (have_saved_context
)
546 /* Lie about where the program actually is stopped since
547 cygwin has informed us that we should consider the signal
548 to have occurred at another location which is stored in
550 memcpy (&th
->context
, &saved_context
,
551 __COPY_CONTEXT_SIZE
);
552 have_saved_context
= 0;
559 th
->wow64_context
.ContextFlags
= CONTEXT_DEBUGGER_DR
;
560 CHECK (Wow64GetThreadContext (th
->h
, &th
->wow64_context
));
561 /* Copy dr values from that thread.
562 But only if there were not modified since last stop.
564 if (!th
->debug_registers_changed
)
566 dr
[0] = th
->wow64_context
.Dr0
;
567 dr
[1] = th
->wow64_context
.Dr1
;
568 dr
[2] = th
->wow64_context
.Dr2
;
569 dr
[3] = th
->wow64_context
.Dr3
;
570 dr
[6] = th
->wow64_context
.Dr6
;
571 dr
[7] = th
->wow64_context
.Dr7
;
577 th
->context
.ContextFlags
= CONTEXT_DEBUGGER_DR
;
578 CHECK (GetThreadContext (th
->h
, &th
->context
));
579 /* Copy dr values from that thread.
580 But only if there were not modified since last stop.
582 if (!th
->debug_registers_changed
)
584 dr
[0] = th
->context
.Dr0
;
585 dr
[1] = th
->context
.Dr1
;
586 dr
[2] = th
->context
.Dr2
;
587 dr
[3] = th
->context
.Dr3
;
588 dr
[6] = th
->context
.Dr6
;
589 dr
[7] = th
->context
.Dr7
;
592 th
->reload_context
= false;
596 for (r
= 0; r
< gdbarch_num_regs (regcache
->arch()); r
++)
597 windows_fetch_one_register (regcache
, th
, r
);
599 windows_fetch_one_register (regcache
, th
, r
);
602 /* Collect the register number R from the given regcache, and store
603 its value into the corresponding area of the given thread's context.
605 This function assumes that R is non-negative. A failed assertion
606 assertion is raised if that is not true. */
609 windows_store_one_register (const struct regcache
*regcache
,
610 windows_thread_info
*th
, int r
)
614 char *context_ptr
= (char *) &th
->context
;
617 context_ptr
= (char *) &th
->wow64_context
;
620 regcache
->raw_collect (r
, context_ptr
+ mappings
[r
]);
623 /* Store a new register value into the context of the thread tied to
627 windows_nat_target::store_registers (struct regcache
*regcache
, int r
)
629 windows_thread_info
*th
= thread_rec (regcache
->ptid (), INVALIDATE_CONTEXT
);
631 /* Check if TH exists. Windows sometimes uses a non-existent
632 thread id in its events. */
637 for (r
= 0; r
< gdbarch_num_regs (regcache
->arch ()); r
++)
638 windows_store_one_register (regcache
, th
, r
);
640 windows_store_one_register (regcache
, th
, r
);
643 /* Maintain a linked list of "so" information. */
644 struct lm_info_windows
: public lm_info_base
646 LPVOID load_addr
= 0;
647 CORE_ADDR text_offset
= 0;
650 static struct so_list solib_start
, *solib_end
;
652 static struct so_list
*
653 windows_make_so (const char *name
, LPVOID load_addr
)
660 WIN32_FIND_DATA w32_fd
;
661 HANDLE h
= FindFirstFile(name
, &w32_fd
);
663 if (h
== INVALID_HANDLE_VALUE
)
669 if (GetCurrentDirectory (MAX_PATH
+ 1, cwd
))
671 p
= strrchr (buf
, '\\');
674 SetCurrentDirectory (buf
);
675 GetFullPathName (w32_fd
.cFileName
, MAX_PATH
, buf
, &p
);
676 SetCurrentDirectory (cwd
);
679 if (strcasecmp (buf
, "ntdll.dll") == 0)
681 GetSystemDirectory (buf
, sizeof (buf
));
682 strcat (buf
, "\\ntdll.dll");
685 cygwin_buf_t buf
[__PMAX
];
688 if (access (name
, F_OK
) != 0)
690 if (strcasecmp (name
, "ntdll.dll") == 0)
693 GetSystemDirectoryW (buf
, sizeof (buf
) / sizeof (wchar_t));
694 wcscat (buf
, L
"\\ntdll.dll");
698 GetSystemDirectoryA (buf
, sizeof (buf
) / sizeof (wchar_t));
699 strcat (buf
, "\\ntdll.dll");
704 so
= XCNEW (struct so_list
);
705 lm_info_windows
*li
= new lm_info_windows
;
707 li
->load_addr
= load_addr
;
708 strcpy (so
->so_original_name
, name
);
710 strcpy (so
->so_name
, buf
);
713 cygwin_conv_path (CCP_WIN_W_TO_POSIX
, buf
, so
->so_name
,
714 SO_NAME_MAX_PATH_SIZE
);
717 char *rname
= realpath (name
, NULL
);
718 if (rname
&& strlen (rname
) < SO_NAME_MAX_PATH_SIZE
)
720 strcpy (so
->so_name
, rname
);
725 warning (_("dll path for \"%s\" too long or inaccessible"), name
);
726 strcpy (so
->so_name
, so
->so_original_name
);
729 /* Record cygwin1.dll .text start/end. */
730 p
= strchr (so
->so_name
, '\0') - (sizeof ("/cygwin1.dll") - 1);
731 if (p
>= so
->so_name
&& strcasecmp (p
, "/cygwin1.dll") == 0)
733 asection
*text
= NULL
;
735 gdb_bfd_ref_ptr
abfd (gdb_bfd_open (so
->so_name
, "pei-i386"));
740 if (bfd_check_format (abfd
.get (), bfd_object
))
741 text
= bfd_get_section_by_name (abfd
.get (), ".text");
746 /* The symbols in a dll are offset by 0x1000, which is the
747 offset from 0 of the first byte in an image - because of the
748 file header and the section alignment. */
749 cygwin_load_start
= (CORE_ADDR
) (uintptr_t) ((char *)
751 cygwin_load_end
= cygwin_load_start
+ bfd_section_size (text
);
758 /* See nat/windows-nat.h. */
761 windows_nat::handle_load_dll (const char *dll_name
, LPVOID base
)
763 solib_end
->next
= windows_make_so (dll_name
, base
);
764 solib_end
= solib_end
->next
;
766 lm_info_windows
*li
= (lm_info_windows
*) solib_end
->lm_info
;
768 DEBUG_EVENTS ("Loading dll \"%s\" at %s.", solib_end
->so_name
,
769 host_address_to_string (li
->load_addr
));
773 windows_free_so (struct so_list
*so
)
775 lm_info_windows
*li
= (lm_info_windows
*) so
->lm_info
;
781 /* See nat/windows-nat.h. */
784 windows_nat::handle_unload_dll ()
786 LPVOID lpBaseOfDll
= current_event
.u
.UnloadDll
.lpBaseOfDll
;
789 for (so
= &solib_start
; so
->next
!= NULL
; so
= so
->next
)
791 lm_info_windows
*li_next
= (lm_info_windows
*) so
->next
->lm_info
;
793 if (li_next
->load_addr
== lpBaseOfDll
)
795 struct so_list
*sodel
= so
->next
;
797 so
->next
= sodel
->next
;
800 DEBUG_EVENTS ("Unloading dll \"%s\".", sodel
->so_name
);
802 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 (_("dll starting at %s not found."),
815 host_address_to_string (lpBaseOfDll
));
818 /* Call FUNC wrapped in a TRY/CATCH that swallows all GDB
822 catch_errors (void (*func
) ())
828 catch (const gdb_exception
&ex
)
830 exception_print (gdb_stderr
, ex
);
834 /* Clear list of loaded DLLs. */
836 windows_clear_solib (void)
840 for (so
= solib_start
.next
; so
; so
= solib_start
.next
)
842 solib_start
.next
= so
->next
;
843 windows_free_so (so
);
846 solib_end
= &solib_start
;
850 signal_event_command (const char *args
, int from_tty
)
852 uintptr_t event_id
= 0;
853 char *endargs
= NULL
;
856 error (_("signal-event requires an argument (integer event id)"));
858 event_id
= strtoumax (args
, &endargs
, 10);
860 if ((errno
== ERANGE
) || (event_id
== 0) || (event_id
> UINTPTR_MAX
) ||
861 ((HANDLE
) event_id
== INVALID_HANDLE_VALUE
))
862 error (_("Failed to convert `%s' to event id"), args
);
864 SetEvent ((HANDLE
) event_id
);
865 CloseHandle ((HANDLE
) event_id
);
868 /* See nat/windows-nat.h. */
871 windows_nat::handle_output_debug_string (struct target_waitstatus
*ourstatus
)
875 gdb::unique_xmalloc_ptr
<char> s
876 = (target_read_string
877 ((CORE_ADDR
) (uintptr_t) current_event
.u
.DebugString
.lpDebugStringData
,
879 if (s
== nullptr || !*(s
.get ()))
881 else if (!startswith (s
.get (), _CYGWIN_SIGNAL_STRING
))
884 if (!startswith (s
.get (), "cYg"))
887 char *p
= strchr (s
.get (), '\0');
889 if (p
> s
.get () && *--p
== '\n')
891 warning (("%s"), s
.get ());
897 /* Got a cygwin signal marker. A cygwin signal is followed by
898 the signal number itself and then optionally followed by the
899 thread id and address to saved context within the DLL. If
900 these are supplied, then the given thread is assumed to have
901 issued the signal and the context from the thread is assumed
902 to be stored at the given address in the inferior. Tell gdb
903 to treat this like a real signal. */
905 int sig
= strtol (s
.get () + sizeof (_CYGWIN_SIGNAL_STRING
) - 1, &p
, 0);
906 gdb_signal gotasig
= gdb_signal_from_host (sig
);
913 ourstatus
->set_stopped (gotasig
);
914 retval
= strtoul (p
, &p
, 0);
916 retval
= current_event
.dwThreadId
;
917 else if ((x
= (LPCVOID
) (uintptr_t) strtoull (p
, NULL
, 0))
918 && ReadProcessMemory (current_process_handle
, x
,
920 __COPY_CONTEXT_SIZE
, &n
)
921 && n
== __COPY_CONTEXT_SIZE
)
922 have_saved_context
= 1;
931 display_selector (HANDLE thread
, DWORD sel
)
937 ret
= Wow64GetThreadSelectorEntry (thread
, sel
, &info
);
940 ret
= GetThreadSelectorEntry (thread
, sel
, &info
);
944 printf_filtered ("0x%03x: ", (unsigned) sel
);
945 if (!info
.HighWord
.Bits
.Pres
)
947 puts_filtered ("Segment not present\n");
950 base
= (info
.HighWord
.Bits
.BaseHi
<< 24) +
951 (info
.HighWord
.Bits
.BaseMid
<< 16)
953 limit
= (info
.HighWord
.Bits
.LimitHi
<< 16) + info
.LimitLow
;
954 if (info
.HighWord
.Bits
.Granularity
)
955 limit
= (limit
<< 12) | 0xfff;
956 printf_filtered ("base=0x%08x limit=0x%08x", base
, limit
);
957 if (info
.HighWord
.Bits
.Default_Big
)
958 puts_filtered(" 32-bit ");
960 puts_filtered(" 16-bit ");
961 switch ((info
.HighWord
.Bits
.Type
& 0xf) >> 1)
964 puts_filtered ("Data (Read-Only, Exp-up");
967 puts_filtered ("Data (Read/Write, Exp-up");
970 puts_filtered ("Unused segment (");
973 puts_filtered ("Data (Read/Write, Exp-down");
976 puts_filtered ("Code (Exec-Only, N.Conf");
979 puts_filtered ("Code (Exec/Read, N.Conf");
982 puts_filtered ("Code (Exec-Only, Conf");
985 puts_filtered ("Code (Exec/Read, Conf");
988 printf_filtered ("Unknown type 0x%lx",
989 (unsigned long) info
.HighWord
.Bits
.Type
);
991 if ((info
.HighWord
.Bits
.Type
& 0x1) == 0)
992 puts_filtered(", N.Acc");
993 puts_filtered (")\n");
994 if ((info
.HighWord
.Bits
.Type
& 0x10) == 0)
995 puts_filtered("System selector ");
996 printf_filtered ("Priviledge level = %ld. ",
997 (unsigned long) info
.HighWord
.Bits
.Dpl
);
998 if (info
.HighWord
.Bits
.Granularity
)
999 puts_filtered ("Page granular.\n");
1001 puts_filtered ("Byte granular.\n");
1006 DWORD err
= GetLastError ();
1007 if (err
== ERROR_NOT_SUPPORTED
)
1008 printf_filtered ("Function not supported\n");
1010 printf_filtered ("Invalid selector 0x%x.\n", (unsigned) sel
);
1016 display_selectors (const char * args
, int from_tty
)
1018 if (inferior_ptid
== null_ptid
)
1020 puts_filtered ("Impossible to display selectors now.\n");
1024 windows_thread_info
*current_windows_thread
1025 = thread_rec (inferior_ptid
, DONT_INVALIDATE_CONTEXT
);
1032 puts_filtered ("Selector $cs\n");
1033 display_selector (current_windows_thread
->h
,
1034 current_windows_thread
->wow64_context
.SegCs
);
1035 puts_filtered ("Selector $ds\n");
1036 display_selector (current_windows_thread
->h
,
1037 current_windows_thread
->wow64_context
.SegDs
);
1038 puts_filtered ("Selector $es\n");
1039 display_selector (current_windows_thread
->h
,
1040 current_windows_thread
->wow64_context
.SegEs
);
1041 puts_filtered ("Selector $ss\n");
1042 display_selector (current_windows_thread
->h
,
1043 current_windows_thread
->wow64_context
.SegSs
);
1044 puts_filtered ("Selector $fs\n");
1045 display_selector (current_windows_thread
->h
,
1046 current_windows_thread
->wow64_context
.SegFs
);
1047 puts_filtered ("Selector $gs\n");
1048 display_selector (current_windows_thread
->h
,
1049 current_windows_thread
->wow64_context
.SegGs
);
1054 puts_filtered ("Selector $cs\n");
1055 display_selector (current_windows_thread
->h
,
1056 current_windows_thread
->context
.SegCs
);
1057 puts_filtered ("Selector $ds\n");
1058 display_selector (current_windows_thread
->h
,
1059 current_windows_thread
->context
.SegDs
);
1060 puts_filtered ("Selector $es\n");
1061 display_selector (current_windows_thread
->h
,
1062 current_windows_thread
->context
.SegEs
);
1063 puts_filtered ("Selector $ss\n");
1064 display_selector (current_windows_thread
->h
,
1065 current_windows_thread
->context
.SegSs
);
1066 puts_filtered ("Selector $fs\n");
1067 display_selector (current_windows_thread
->h
,
1068 current_windows_thread
->context
.SegFs
);
1069 puts_filtered ("Selector $gs\n");
1070 display_selector (current_windows_thread
->h
,
1071 current_windows_thread
->context
.SegGs
);
1077 sel
= parse_and_eval_long (args
);
1078 printf_filtered ("Selector \"%s\"\n",args
);
1079 display_selector (current_windows_thread
->h
, sel
);
1083 /* See nat/windows-nat.h. */
1086 windows_nat::handle_ms_vc_exception (const EXCEPTION_RECORD
*rec
)
1088 if (rec
->NumberParameters
>= 3
1089 && (rec
->ExceptionInformation
[0] & 0xffffffff) == 0x1000)
1091 DWORD named_thread_id
;
1092 windows_thread_info
*named_thread
;
1093 CORE_ADDR thread_name_target
;
1095 thread_name_target
= rec
->ExceptionInformation
[1];
1096 named_thread_id
= (DWORD
) (0xffffffff & rec
->ExceptionInformation
[2]);
1098 if (named_thread_id
== (DWORD
) -1)
1099 named_thread_id
= current_event
.dwThreadId
;
1101 named_thread
= thread_rec (ptid_t (current_event
.dwProcessId
,
1102 named_thread_id
, 0),
1103 DONT_INVALIDATE_CONTEXT
);
1104 if (named_thread
!= NULL
)
1106 int thread_name_len
;
1107 gdb::unique_xmalloc_ptr
<char> thread_name
1108 = target_read_string (thread_name_target
, 1025, &thread_name_len
);
1109 if (thread_name_len
> 0)
1111 thread_name
.get ()[thread_name_len
- 1] = '\0';
1112 named_thread
->name
= std::move (thread_name
);
1122 /* See nat/windows-nat.h. */
1125 windows_nat::handle_access_violation (const EXCEPTION_RECORD
*rec
)
1128 /* See if the access violation happened within the cygwin DLL
1129 itself. Cygwin uses a kind of exception handling to deal with
1130 passed-in invalid addresses. gdb should not treat these as real
1131 SEGVs since they will be silently handled by cygwin. A real SEGV
1132 will (theoretically) be caught by cygwin later in the process and
1133 will be sent as a cygwin-specific-signal. So, ignore SEGVs if
1134 they show up within the text segment of the DLL itself. */
1136 CORE_ADDR addr
= (CORE_ADDR
) (uintptr_t) rec
->ExceptionAddress
;
1138 if ((!cygwin_exceptions
&& (addr
>= cygwin_load_start
1139 && addr
< cygwin_load_end
))
1140 || (find_pc_partial_function (addr
, &fn
, NULL
, NULL
)
1141 && startswith (fn
, "KERNEL32!IsBad")))
1147 /* Resume thread specified by ID, or all artificially suspended
1148 threads, if we are continuing execution. KILLED non-zero means we
1149 have killed the inferior, so we should ignore weird errors due to
1150 threads shutting down. */
1152 windows_continue (DWORD continue_status
, int id
, int killed
)
1156 desired_stop_thread_id
= id
;
1158 if (matching_pending_stop (debug_events
))
1161 for (windows_thread_info
*th
: thread_list
)
1162 if (id
== -1 || id
== (int) th
->tid
)
1167 if (th
->debug_registers_changed
)
1169 th
->wow64_context
.ContextFlags
|= CONTEXT_DEBUG_REGISTERS
;
1170 th
->wow64_context
.Dr0
= dr
[0];
1171 th
->wow64_context
.Dr1
= dr
[1];
1172 th
->wow64_context
.Dr2
= dr
[2];
1173 th
->wow64_context
.Dr3
= dr
[3];
1174 th
->wow64_context
.Dr6
= DR6_CLEAR_VALUE
;
1175 th
->wow64_context
.Dr7
= dr
[7];
1176 th
->debug_registers_changed
= false;
1178 if (th
->wow64_context
.ContextFlags
)
1182 if (GetExitCodeThread (th
->h
, &ec
)
1183 && ec
== STILL_ACTIVE
)
1185 BOOL status
= Wow64SetThreadContext (th
->h
,
1186 &th
->wow64_context
);
1191 th
->wow64_context
.ContextFlags
= 0;
1197 if (th
->debug_registers_changed
)
1199 th
->context
.ContextFlags
|= CONTEXT_DEBUG_REGISTERS
;
1200 th
->context
.Dr0
= dr
[0];
1201 th
->context
.Dr1
= dr
[1];
1202 th
->context
.Dr2
= dr
[2];
1203 th
->context
.Dr3
= dr
[3];
1204 th
->context
.Dr6
= DR6_CLEAR_VALUE
;
1205 th
->context
.Dr7
= dr
[7];
1206 th
->debug_registers_changed
= false;
1208 if (th
->context
.ContextFlags
)
1212 if (GetExitCodeThread (th
->h
, &ec
)
1213 && ec
== STILL_ACTIVE
)
1215 BOOL status
= SetThreadContext (th
->h
, &th
->context
);
1220 th
->context
.ContextFlags
= 0;
1227 /* When single-stepping a specific thread, other threads must
1232 res
= continue_last_debug_event (continue_status
, debug_events
);
1235 error (_("Failed to resume program execution"
1236 " (ContinueDebugEvent failed, error %u)"),
1237 (unsigned int) GetLastError ());
1242 /* Called in pathological case where Windows fails to send a
1243 CREATE_PROCESS_DEBUG_EVENT after an attach. */
1245 fake_create_process (void)
1247 current_process_handle
= OpenProcess (PROCESS_ALL_ACCESS
, FALSE
,
1248 current_event
.dwProcessId
);
1249 if (current_process_handle
!= NULL
)
1250 open_process_used
= 1;
1253 error (_("OpenProcess call failed, GetLastError = %u"),
1254 (unsigned) GetLastError ());
1255 /* We can not debug anything in that case. */
1257 windows_add_thread (ptid_t (current_event
.dwProcessId
, 0,
1258 current_event
.dwThreadId
),
1259 current_event
.u
.CreateThread
.hThread
,
1260 current_event
.u
.CreateThread
.lpThreadLocalBase
,
1261 true /* main_thread_p */);
1262 return current_event
.dwThreadId
;
1266 windows_nat_target::resume (ptid_t ptid
, int step
, enum gdb_signal sig
)
1268 windows_thread_info
*th
;
1269 DWORD continue_status
= DBG_CONTINUE
;
1271 /* A specific PTID means `step only this thread id'. */
1272 int resume_all
= ptid
== minus_one_ptid
;
1274 /* If we're continuing all threads, it's the current inferior that
1275 should be handled specially. */
1277 ptid
= inferior_ptid
;
1279 if (sig
!= GDB_SIGNAL_0
)
1281 if (current_event
.dwDebugEventCode
!= EXCEPTION_DEBUG_EVENT
)
1283 DEBUG_EXCEPT ("Cannot continue with signal %d here.", sig
);
1285 else if (sig
== last_sig
)
1286 continue_status
= DBG_EXCEPTION_NOT_HANDLED
;
1289 /* This code does not seem to work, because
1290 the kernel does probably not consider changes in the ExceptionRecord
1291 structure when passing the exception to the inferior.
1292 Note that this seems possible in the exception handler itself. */
1294 for (const xlate_exception
&x
: xlate
)
1297 current_event
.u
.Exception
.ExceptionRecord
.ExceptionCode
1299 continue_status
= DBG_EXCEPTION_NOT_HANDLED
;
1302 if (continue_status
== DBG_CONTINUE
)
1304 DEBUG_EXCEPT ("Cannot continue with signal %d.", sig
);
1308 DEBUG_EXCEPT ("Can only continue with received signal %d.",
1312 last_sig
= GDB_SIGNAL_0
;
1314 DEBUG_EXEC ("pid=%d, tid=0x%x, step=%d, sig=%d",
1315 ptid
.pid (), (unsigned) ptid
.lwp (), step
, sig
);
1317 /* Get context for currently selected thread. */
1318 th
= thread_rec (inferior_ptid
, DONT_INVALIDATE_CONTEXT
);
1326 /* Single step by setting t bit. */
1327 struct regcache
*regcache
= get_current_regcache ();
1328 struct gdbarch
*gdbarch
= regcache
->arch ();
1329 fetch_registers (regcache
, gdbarch_ps_regnum (gdbarch
));
1330 th
->wow64_context
.EFlags
|= FLAG_TRACE_BIT
;
1333 if (th
->wow64_context
.ContextFlags
)
1335 if (th
->debug_registers_changed
)
1337 th
->wow64_context
.Dr0
= dr
[0];
1338 th
->wow64_context
.Dr1
= dr
[1];
1339 th
->wow64_context
.Dr2
= dr
[2];
1340 th
->wow64_context
.Dr3
= dr
[3];
1341 th
->wow64_context
.Dr6
= DR6_CLEAR_VALUE
;
1342 th
->wow64_context
.Dr7
= dr
[7];
1343 th
->debug_registers_changed
= false;
1345 CHECK (Wow64SetThreadContext (th
->h
, &th
->wow64_context
));
1346 th
->wow64_context
.ContextFlags
= 0;
1354 /* Single step by setting t bit. */
1355 struct regcache
*regcache
= get_current_regcache ();
1356 struct gdbarch
*gdbarch
= regcache
->arch ();
1357 fetch_registers (regcache
, gdbarch_ps_regnum (gdbarch
));
1358 th
->context
.EFlags
|= FLAG_TRACE_BIT
;
1361 if (th
->context
.ContextFlags
)
1363 if (th
->debug_registers_changed
)
1365 th
->context
.Dr0
= dr
[0];
1366 th
->context
.Dr1
= dr
[1];
1367 th
->context
.Dr2
= dr
[2];
1368 th
->context
.Dr3
= dr
[3];
1369 th
->context
.Dr6
= DR6_CLEAR_VALUE
;
1370 th
->context
.Dr7
= dr
[7];
1371 th
->debug_registers_changed
= false;
1373 CHECK (SetThreadContext (th
->h
, &th
->context
));
1374 th
->context
.ContextFlags
= 0;
1379 /* Allow continuing with the same signal that interrupted us.
1380 Otherwise complain. */
1383 windows_continue (continue_status
, -1, 0);
1385 windows_continue (continue_status
, ptid
.lwp (), 0);
1388 /* Ctrl-C handler used when the inferior is not run in the same console. The
1389 handler is in charge of interrupting the inferior using DebugBreakProcess.
1390 Note that this function is not available prior to Windows XP. In this case
1391 we emit a warning. */
1393 ctrl_c_handler (DWORD event_type
)
1395 const int attach_flag
= current_inferior ()->attach_flag
;
1397 /* Only handle Ctrl-C and Ctrl-Break events. Ignore others. */
1398 if (event_type
!= CTRL_C_EVENT
&& event_type
!= CTRL_BREAK_EVENT
)
1401 /* If the inferior and the debugger share the same console, do nothing as
1402 the inferior has also received the Ctrl-C event. */
1403 if (!new_console
&& !attach_flag
)
1409 /* Call DbgUiRemoteBreakin of the 32bit ntdll.dll in the target process.
1410 DebugBreakProcess would call the one of the 64bit ntdll.dll, which
1411 can't be correctly handled by gdb. */
1412 if (wow64_dbgbreak
== nullptr)
1415 if (!find_minimal_symbol_address ("ntdll!DbgUiRemoteBreakin",
1417 wow64_dbgbreak
= (void *) addr
;
1420 if (wow64_dbgbreak
!= nullptr)
1422 HANDLE thread
= CreateRemoteThread (current_process_handle
, NULL
,
1423 0, (LPTHREAD_START_ROUTINE
)
1424 wow64_dbgbreak
, NULL
, 0, NULL
);
1426 CloseHandle (thread
);
1432 if (!DebugBreakProcess (current_process_handle
))
1433 warning (_("Could not interrupt program. "
1434 "Press Ctrl-c in the program console."));
1437 /* Return true to tell that Ctrl-C has been handled. */
1441 /* Get the next event from the child. Returns a non-zero thread id if the event
1442 requires handling by WFI (or whatever). */
1445 windows_nat_target::get_windows_debug_event (int pid
,
1446 struct target_waitstatus
*ourstatus
)
1449 DWORD continue_status
, event_code
;
1450 DWORD thread_id
= 0;
1452 /* If there is a relevant pending stop, report it now. See the
1453 comment by the definition of "pending_stops" for details on why
1455 gdb::optional
<pending_stop
> stop
= fetch_pending_stop (debug_events
);
1456 if (stop
.has_value ())
1458 thread_id
= stop
->thread_id
;
1459 *ourstatus
= stop
->status
;
1461 ptid_t
ptid (current_event
.dwProcessId
, thread_id
);
1462 windows_thread_info
*th
= thread_rec (ptid
, INVALIDATE_CONTEXT
);
1463 th
->reload_context
= true;
1468 last_sig
= GDB_SIGNAL_0
;
1470 if (!(debug_event
= wait_for_debug_event (¤t_event
, 1000)))
1473 continue_status
= DBG_CONTINUE
;
1475 event_code
= current_event
.dwDebugEventCode
;
1476 ourstatus
->set_spurious ();
1477 have_saved_context
= 0;
1481 case CREATE_THREAD_DEBUG_EVENT
:
1482 DEBUG_EVENTS ("kernel event for pid=%u tid=0x%x code=%s",
1483 (unsigned) current_event
.dwProcessId
,
1484 (unsigned) current_event
.dwThreadId
,
1485 "CREATE_THREAD_DEBUG_EVENT");
1486 if (saw_create
!= 1)
1488 inferior
*inf
= find_inferior_pid (this, current_event
.dwProcessId
);
1489 if (!saw_create
&& inf
->attach_flag
)
1491 /* Kludge around a Windows bug where first event is a create
1492 thread event. Caused when attached process does not have
1494 thread_id
= fake_create_process ();
1500 /* Record the existence of this thread. */
1501 thread_id
= current_event
.dwThreadId
;
1503 (ptid_t (current_event
.dwProcessId
, current_event
.dwThreadId
, 0),
1504 current_event
.u
.CreateThread
.hThread
,
1505 current_event
.u
.CreateThread
.lpThreadLocalBase
,
1506 false /* main_thread_p */);
1510 case EXIT_THREAD_DEBUG_EVENT
:
1511 DEBUG_EVENTS ("kernel event for pid=%u tid=0x%x code=%s",
1512 (unsigned) current_event
.dwProcessId
,
1513 (unsigned) current_event
.dwThreadId
,
1514 "EXIT_THREAD_DEBUG_EVENT");
1515 windows_delete_thread (ptid_t (current_event
.dwProcessId
,
1516 current_event
.dwThreadId
, 0),
1517 current_event
.u
.ExitThread
.dwExitCode
,
1518 false /* main_thread_p */);
1521 case CREATE_PROCESS_DEBUG_EVENT
:
1522 DEBUG_EVENTS ("kernel event for pid=%u tid=0x%x code=%s",
1523 (unsigned) current_event
.dwProcessId
,
1524 (unsigned) current_event
.dwThreadId
,
1525 "CREATE_PROCESS_DEBUG_EVENT");
1526 CloseHandle (current_event
.u
.CreateProcessInfo
.hFile
);
1527 if (++saw_create
!= 1)
1530 current_process_handle
= current_event
.u
.CreateProcessInfo
.hProcess
;
1531 /* Add the main thread. */
1533 (ptid_t (current_event
.dwProcessId
,
1534 current_event
.dwThreadId
, 0),
1535 current_event
.u
.CreateProcessInfo
.hThread
,
1536 current_event
.u
.CreateProcessInfo
.lpThreadLocalBase
,
1537 true /* main_thread_p */);
1538 thread_id
= current_event
.dwThreadId
;
1541 case EXIT_PROCESS_DEBUG_EVENT
:
1542 DEBUG_EVENTS ("kernel event for pid=%u tid=0x%x code=%s",
1543 (unsigned) current_event
.dwProcessId
,
1544 (unsigned) current_event
.dwThreadId
,
1545 "EXIT_PROCESS_DEBUG_EVENT");
1546 if (!windows_initialization_done
)
1548 target_terminal::ours ();
1549 target_mourn_inferior (inferior_ptid
);
1550 error (_("During startup program exited with code 0x%x."),
1551 (unsigned int) current_event
.u
.ExitProcess
.dwExitCode
);
1553 else if (saw_create
== 1)
1555 windows_delete_thread (ptid_t (current_event
.dwProcessId
,
1556 current_event
.dwThreadId
, 0),
1557 0, true /* main_thread_p */);
1558 DWORD exit_status
= current_event
.u
.ExitProcess
.dwExitCode
;
1559 /* If the exit status looks like a fatal exception, but we
1560 don't recognize the exception's code, make the original
1561 exit status value available, to avoid losing
1564 = WIFSIGNALED (exit_status
) ? WTERMSIG (exit_status
) : -1;
1565 if (exit_signal
== -1)
1566 ourstatus
->set_exited (exit_status
);
1568 ourstatus
->set_signalled (gdb_signal_from_host (exit_signal
));
1570 thread_id
= current_event
.dwThreadId
;
1574 case LOAD_DLL_DEBUG_EVENT
:
1575 DEBUG_EVENTS ("kernel event for pid=%u tid=0x%x code=%s",
1576 (unsigned) current_event
.dwProcessId
,
1577 (unsigned) current_event
.dwThreadId
,
1578 "LOAD_DLL_DEBUG_EVENT");
1579 CloseHandle (current_event
.u
.LoadDll
.hFile
);
1580 if (saw_create
!= 1 || ! windows_initialization_done
)
1582 catch_errors (dll_loaded_event
);
1583 ourstatus
->set_loaded ();
1584 thread_id
= current_event
.dwThreadId
;
1587 case UNLOAD_DLL_DEBUG_EVENT
:
1588 DEBUG_EVENTS ("kernel event for pid=%u tid=0x%x code=%s",
1589 (unsigned) current_event
.dwProcessId
,
1590 (unsigned) current_event
.dwThreadId
,
1591 "UNLOAD_DLL_DEBUG_EVENT");
1592 if (saw_create
!= 1 || ! windows_initialization_done
)
1594 catch_errors (handle_unload_dll
);
1595 ourstatus
->set_loaded ();
1596 thread_id
= current_event
.dwThreadId
;
1599 case EXCEPTION_DEBUG_EVENT
:
1600 DEBUG_EVENTS ("kernel event for pid=%u tid=0x%x code=%s",
1601 (unsigned) current_event
.dwProcessId
,
1602 (unsigned) current_event
.dwThreadId
,
1603 "EXCEPTION_DEBUG_EVENT");
1604 if (saw_create
!= 1)
1606 switch (handle_exception (ourstatus
, debug_exceptions
))
1608 case HANDLE_EXCEPTION_UNHANDLED
:
1610 continue_status
= DBG_EXCEPTION_NOT_HANDLED
;
1612 case HANDLE_EXCEPTION_HANDLED
:
1613 thread_id
= current_event
.dwThreadId
;
1615 case HANDLE_EXCEPTION_IGNORED
:
1616 continue_status
= DBG_CONTINUE
;
1621 case OUTPUT_DEBUG_STRING_EVENT
: /* Message from the kernel. */
1622 DEBUG_EVENTS ("kernel event for pid=%u tid=0x%x code=%s",
1623 (unsigned) current_event
.dwProcessId
,
1624 (unsigned) current_event
.dwThreadId
,
1625 "OUTPUT_DEBUG_STRING_EVENT");
1626 if (saw_create
!= 1)
1628 thread_id
= handle_output_debug_string (ourstatus
);
1632 if (saw_create
!= 1)
1634 printf_unfiltered ("gdb: kernel event for pid=%u tid=0x%x\n",
1635 (unsigned) current_event
.dwProcessId
,
1636 (unsigned) current_event
.dwThreadId
);
1637 printf_unfiltered (" unknown event code %u\n",
1638 (unsigned) current_event
.dwDebugEventCode
);
1642 if (!thread_id
|| saw_create
!= 1)
1644 CHECK (windows_continue (continue_status
, desired_stop_thread_id
, 0));
1646 else if (desired_stop_thread_id
!= -1 && desired_stop_thread_id
!= thread_id
)
1648 /* Pending stop. See the comment by the definition of
1649 "pending_stops" for details on why this is needed. */
1650 DEBUG_EVENTS ("get_windows_debug_event - "
1651 "unexpected stop in 0x%x (expecting 0x%x)",
1652 thread_id
, desired_stop_thread_id
);
1654 if (current_event
.dwDebugEventCode
== EXCEPTION_DEBUG_EVENT
1655 && ((current_event
.u
.Exception
.ExceptionRecord
.ExceptionCode
1656 == EXCEPTION_BREAKPOINT
)
1657 || (current_event
.u
.Exception
.ExceptionRecord
.ExceptionCode
1658 == STATUS_WX86_BREAKPOINT
))
1659 && windows_initialization_done
)
1661 ptid_t ptid
= ptid_t (current_event
.dwProcessId
, thread_id
, 0);
1662 windows_thread_info
*th
= thread_rec (ptid
, INVALIDATE_CONTEXT
);
1663 th
->stopped_at_software_breakpoint
= true;
1664 th
->pc_adjusted
= false;
1666 pending_stops
.push_back ({thread_id
, *ourstatus
, current_event
});
1668 CHECK (windows_continue (continue_status
, desired_stop_thread_id
, 0));
1675 /* Wait for interesting events to occur in the target process. */
1677 windows_nat_target::wait (ptid_t ptid
, struct target_waitstatus
*ourstatus
,
1678 target_wait_flags options
)
1682 /* We loop when we get a non-standard exception rather than return
1683 with a SPURIOUS because resume can try and step or modify things,
1684 which needs a current_thread->h. But some of these exceptions mark
1685 the birth or death of threads, which mean that the current thread
1686 isn't necessarily what you think it is. */
1692 /* If the user presses Ctrl-c while the debugger is waiting
1693 for an event, he expects the debugger to interrupt his program
1694 and to get the prompt back. There are two possible situations:
1696 - The debugger and the program do not share the console, in
1697 which case the Ctrl-c event only reached the debugger.
1698 In that case, the ctrl_c handler will take care of interrupting
1699 the inferior. Note that this case is working starting with
1700 Windows XP. For Windows 2000, Ctrl-C should be pressed in the
1703 - The debugger and the program share the same console, in which
1704 case both debugger and inferior will receive the Ctrl-c event.
1705 In that case the ctrl_c handler will ignore the event, as the
1706 Ctrl-c event generated inside the inferior will trigger the
1707 expected debug event.
1709 FIXME: brobecker/2008-05-20: If the inferior receives the
1710 signal first and the delay until GDB receives that signal
1711 is sufficiently long, GDB can sometimes receive the SIGINT
1712 after we have unblocked the CTRL+C handler. This would
1713 lead to the debugger stopping prematurely while handling
1714 the new-thread event that comes with the handling of the SIGINT
1715 inside the inferior, and then stop again immediately when
1716 the user tries to resume the execution in the inferior.
1717 This is a classic race that we should try to fix one day. */
1718 SetConsoleCtrlHandler (&ctrl_c_handler
, TRUE
);
1719 retval
= get_windows_debug_event (pid
, ourstatus
);
1720 SetConsoleCtrlHandler (&ctrl_c_handler
, FALSE
);
1724 ptid_t result
= ptid_t (current_event
.dwProcessId
, retval
, 0);
1726 if (ourstatus
->kind () != TARGET_WAITKIND_EXITED
1727 && ourstatus
->kind () != TARGET_WAITKIND_SIGNALLED
)
1729 windows_thread_info
*th
= thread_rec (result
, INVALIDATE_CONTEXT
);
1733 th
->stopped_at_software_breakpoint
= false;
1734 if (current_event
.dwDebugEventCode
== EXCEPTION_DEBUG_EVENT
1735 && ((current_event
.u
.Exception
.ExceptionRecord
.ExceptionCode
1736 == EXCEPTION_BREAKPOINT
)
1737 || (current_event
.u
.Exception
.ExceptionRecord
.ExceptionCode
1738 == STATUS_WX86_BREAKPOINT
))
1739 && windows_initialization_done
)
1741 th
->stopped_at_software_breakpoint
= true;
1742 th
->pc_adjusted
= false;
1753 if (deprecated_ui_loop_hook
!= NULL
)
1754 detach
= deprecated_ui_loop_hook (0);
1763 windows_nat_target::do_initial_windows_stuff (DWORD pid
, bool attaching
)
1766 struct inferior
*inf
;
1768 last_sig
= GDB_SIGNAL_0
;
1769 open_process_used
= 0;
1770 for (i
= 0; i
< sizeof (dr
) / sizeof (dr
[0]); i
++)
1773 cygwin_load_start
= cygwin_load_end
= 0;
1775 current_event
.dwProcessId
= pid
;
1776 memset (¤t_event
, 0, sizeof (current_event
));
1777 inf
= current_inferior ();
1778 if (!inf
->target_is_pushed (this))
1779 inf
->push_target (this);
1780 disable_breakpoints_in_shlibs ();
1781 windows_clear_solib ();
1782 clear_proceed_status (0);
1783 init_wait_for_inferior ();
1786 ignore_first_breakpoint
= !attaching
&& wow64_process
;
1790 windows_set_context_register_offsets (amd64_mappings
);
1791 windows_set_segment_register_p (amd64_windows_segment_register_p
);
1796 windows_set_context_register_offsets (i386_mappings
);
1797 windows_set_segment_register_p (i386_windows_segment_register_p
);
1800 inferior_appeared (inf
, pid
);
1801 inf
->attach_flag
= attaching
;
1803 target_terminal::init ();
1804 target_terminal::inferior ();
1806 windows_initialization_done
= 0;
1812 struct target_waitstatus status
;
1814 last_ptid
= this->wait (minus_one_ptid
, &status
, 0);
1816 /* Note windows_wait returns TARGET_WAITKIND_SPURIOUS for thread
1818 if (status
.kind () != TARGET_WAITKIND_LOADED
1819 && status
.kind () != TARGET_WAITKIND_SPURIOUS
)
1822 this->resume (minus_one_ptid
, 0, GDB_SIGNAL_0
);
1825 switch_to_thread (find_thread_ptid (this, last_ptid
));
1827 /* Now that the inferior has been started and all DLLs have been mapped,
1828 we can iterate over all DLLs and load them in.
1830 We avoid doing it any earlier because, on certain versions of Windows,
1831 LOAD_DLL_DEBUG_EVENTs are sometimes not complete. In particular,
1832 we have seen on Windows 8.1 that the ntdll.dll load event does not
1833 include the DLL name, preventing us from creating an associated SO.
1834 A possible explanation is that ntdll.dll might be mapped before
1835 the SO info gets created by the Windows system -- ntdll.dll is
1836 the first DLL to be reported via LOAD_DLL_DEBUG_EVENT and other DLLs
1837 do not seem to suffer from that problem.
1839 Rather than try to work around this sort of issue, it is much
1840 simpler to just ignore DLL load/unload events during the startup
1841 phase, and then process them all in one batch now. */
1842 windows_add_all_dlls ();
1844 windows_initialization_done
= 1;
1848 /* Try to set or remove a user privilege to the current process. Return -1
1849 if that fails, the previous setting of that privilege otherwise.
1851 This code is copied from the Cygwin source code and rearranged to allow
1852 dynamically loading of the needed symbols from advapi32 which is only
1853 available on NT/2K/XP. */
1855 set_process_privilege (const char *privilege
, BOOL enable
)
1857 HANDLE token_hdl
= NULL
;
1859 TOKEN_PRIVILEGES new_priv
, orig_priv
;
1863 if (!OpenProcessToken (GetCurrentProcess (),
1864 TOKEN_QUERY
| TOKEN_ADJUST_PRIVILEGES
,
1868 if (!LookupPrivilegeValueA (NULL
, privilege
, &restore_priv
))
1871 new_priv
.PrivilegeCount
= 1;
1872 new_priv
.Privileges
[0].Luid
= restore_priv
;
1873 new_priv
.Privileges
[0].Attributes
= enable
? SE_PRIVILEGE_ENABLED
: 0;
1875 if (!AdjustTokenPrivileges (token_hdl
, FALSE
, &new_priv
,
1876 sizeof orig_priv
, &orig_priv
, &size
))
1879 /* Disabled, otherwise every `attach' in an unprivileged user session
1880 would raise the "Failed to get SE_DEBUG_NAME privilege" warning in
1881 windows_attach(). */
1882 /* AdjustTokenPrivileges returns TRUE even if the privilege could not
1883 be enabled. GetLastError () returns an correct error code, though. */
1884 if (enable
&& GetLastError () == ERROR_NOT_ALL_ASSIGNED
)
1888 ret
= orig_priv
.Privileges
[0].Attributes
== SE_PRIVILEGE_ENABLED
? 1 : 0;
1892 CloseHandle (token_hdl
);
1897 /* Attach to process PID, then initialize for debugging it. */
1900 windows_nat_target::attach (const char *args
, int from_tty
)
1905 pid
= parse_pid_to_attach (args
);
1907 if (set_process_privilege (SE_DEBUG_NAME
, TRUE
) < 0)
1908 warning ("Failed to get SE_DEBUG_NAME privilege\n"
1909 "This can cause attach to fail on Windows NT/2K/XP");
1911 windows_init_thread_list ();
1912 ok
= DebugActiveProcess (pid
);
1918 /* Try fall back to Cygwin pid. */
1919 pid
= cygwin_internal (CW_CYGWIN_PID_TO_WINPID
, pid
);
1922 ok
= DebugActiveProcess (pid
);
1927 error (_("Can't attach to process %u (error %u)"),
1928 (unsigned) pid
, (unsigned) GetLastError ());
1930 DebugSetProcessKillOnExit (FALSE
);
1932 target_announce_attach (from_tty
, pid
);
1935 HANDLE h
= OpenProcess (PROCESS_QUERY_INFORMATION
, FALSE
, pid
);
1939 if (IsWow64Process (h
, &wow64
))
1940 wow64_process
= wow64
;
1945 do_initial_windows_stuff (pid
, 1);
1946 target_terminal::ours ();
1950 windows_nat_target::detach (inferior
*inf
, int from_tty
)
1954 ptid_t ptid
= minus_one_ptid
;
1955 resume (ptid
, 0, GDB_SIGNAL_0
);
1957 if (!DebugActiveProcessStop (current_event
.dwProcessId
))
1959 error (_("Can't detach process %u (error %u)"),
1960 (unsigned) current_event
.dwProcessId
, (unsigned) GetLastError ());
1963 DebugSetProcessKillOnExit (FALSE
);
1966 target_announce_detach (from_tty
);
1968 x86_cleanup_dregs ();
1969 switch_to_no_thread ();
1970 detach_inferior (inf
);
1972 maybe_unpush_target ();
1975 /* Try to determine the executable filename.
1977 EXE_NAME_RET is a pointer to a buffer whose size is EXE_NAME_MAX_LEN.
1979 Upon success, the filename is stored inside EXE_NAME_RET, and
1980 this function returns nonzero.
1982 Otherwise, this function returns zero and the contents of
1983 EXE_NAME_RET is undefined. */
1986 windows_get_exec_module_filename (char *exe_name_ret
, size_t exe_name_max_len
)
1996 if (!EnumProcessModulesEx (current_process_handle
, &dh_buf
,
1997 sizeof (HMODULE
), &cbNeeded
,
1998 LIST_MODULES_32BIT
) || !cbNeeded
)
2004 if (!EnumProcessModules (current_process_handle
, &dh_buf
,
2005 sizeof (HMODULE
), &cbNeeded
) || !cbNeeded
)
2009 /* We know the executable is always first in the list of modules,
2010 which we just fetched. So no need to fetch more. */
2014 /* Cygwin prefers that the path be in /x/y/z format, so extract
2015 the filename into a temporary buffer first, and then convert it
2016 to POSIX format into the destination buffer. */
2017 cygwin_buf_t
*pathbuf
= (cygwin_buf_t
*) alloca (exe_name_max_len
* sizeof (cygwin_buf_t
));
2019 len
= GetModuleFileNameEx (current_process_handle
,
2020 dh_buf
, pathbuf
, exe_name_max_len
);
2022 error (_("Error getting executable filename: %u."),
2023 (unsigned) GetLastError ());
2024 if (cygwin_conv_path (CCP_WIN_W_TO_POSIX
, pathbuf
, exe_name_ret
,
2025 exe_name_max_len
) < 0)
2026 error (_("Error converting executable filename to POSIX: %d."), errno
);
2029 len
= GetModuleFileNameEx (current_process_handle
,
2030 dh_buf
, exe_name_ret
, exe_name_max_len
);
2032 error (_("Error getting executable filename: %u."),
2033 (unsigned) GetLastError ());
2036 return 1; /* success */
2039 /* The pid_to_exec_file target_ops method for this platform. */
2042 windows_nat_target::pid_to_exec_file (int pid
)
2044 static char path
[__PMAX
];
2046 /* Try to find exe name as symlink target of /proc/<pid>/exe. */
2048 char procexe
[sizeof ("/proc/4294967295/exe")];
2050 xsnprintf (procexe
, sizeof (procexe
), "/proc/%u/exe", pid
);
2051 nchars
= readlink (procexe
, path
, sizeof(path
));
2052 if (nchars
> 0 && nchars
< sizeof (path
))
2054 path
[nchars
] = '\0'; /* Got it */
2059 /* If we get here then either Cygwin is hosed, this isn't a Cygwin version
2060 of gdb, or we're trying to debug a non-Cygwin windows executable. */
2061 if (!windows_get_exec_module_filename (path
, sizeof (path
)))
2067 /* Print status information about what we're accessing. */
2070 windows_nat_target::files_info ()
2072 struct inferior
*inf
= current_inferior ();
2074 printf_filtered ("\tUsing the running image of %s %s.\n",
2075 inf
->attach_flag
? "attached" : "child",
2076 target_pid_to_str (inferior_ptid
).c_str ());
2079 /* Modify CreateProcess parameters for use of a new separate console.
2081 *FLAGS: DWORD parameter for general process creation flags.
2082 *SI: STARTUPINFO structure, for which the console window size and
2083 console buffer size is filled in if GDB is running in a console.
2084 to create the new console.
2085 The size of the used font is not available on all versions of
2086 Windows OS. Furthermore, the current font might not be the default
2087 font, but this is still better than before.
2088 If the windows and buffer sizes are computed,
2089 SI->DWFLAGS is changed so that this information is used
2090 by CreateProcess function. */
2093 windows_set_console_info (STARTUPINFO
*si
, DWORD
*flags
)
2095 HANDLE hconsole
= CreateFile ("CONOUT$", GENERIC_READ
| GENERIC_WRITE
,
2096 FILE_SHARE_READ
, NULL
, OPEN_EXISTING
, 0, 0);
2098 if (hconsole
!= INVALID_HANDLE_VALUE
)
2100 CONSOLE_SCREEN_BUFFER_INFO sbinfo
;
2102 CONSOLE_FONT_INFO cfi
;
2104 GetCurrentConsoleFont (hconsole
, FALSE
, &cfi
);
2105 font_size
= GetConsoleFontSize (hconsole
, cfi
.nFont
);
2106 GetConsoleScreenBufferInfo(hconsole
, &sbinfo
);
2107 si
->dwXSize
= sbinfo
.srWindow
.Right
- sbinfo
.srWindow
.Left
+ 1;
2108 si
->dwYSize
= sbinfo
.srWindow
.Bottom
- sbinfo
.srWindow
.Top
+ 1;
2110 si
->dwXSize
*= font_size
.X
;
2114 si
->dwYSize
*= font_size
.Y
;
2117 si
->dwXCountChars
= sbinfo
.dwSize
.X
;
2118 si
->dwYCountChars
= sbinfo
.dwSize
.Y
;
2119 si
->dwFlags
|= STARTF_USESIZE
| STARTF_USECOUNTCHARS
;
2121 *flags
|= CREATE_NEW_CONSOLE
;
2125 /* Function called by qsort to sort environment strings. */
2128 envvar_cmp (const void *a
, const void *b
)
2130 const char **p
= (const char **) a
;
2131 const char **q
= (const char **) b
;
2132 return strcasecmp (*p
, *q
);
2138 clear_win32_environment (char **env
)
2142 wchar_t *copy
= NULL
, *equalpos
;
2144 for (i
= 0; env
[i
] && *env
[i
]; i
++)
2146 len
= mbstowcs (NULL
, env
[i
], 0) + 1;
2147 copy
= (wchar_t *) xrealloc (copy
, len
* sizeof (wchar_t));
2148 mbstowcs (copy
, env
[i
], len
);
2149 equalpos
= wcschr (copy
, L
'=');
2152 SetEnvironmentVariableW (copy
, NULL
);
2160 /* Redirection of inferior I/O streams for native MS-Windows programs.
2161 Unlike on Unix, where this is handled by invoking the inferior via
2162 the shell, on MS-Windows we need to emulate the cmd.exe shell.
2164 The official documentation of the cmd.exe redirection features is here:
2166 http://www.microsoft.com/resources/documentation/windows/xp/all/proddocs/en-us/redirection.mspx
2168 (That page talks about Windows XP, but there's no newer
2169 documentation, so we assume later versions of cmd.exe didn't change
2172 Caveat: the documentation on that page seems to include a few lies.
2173 For example, it describes strange constructs 1<&2 and 2<&1, which
2174 seem to work only when 1>&2 resp. 2>&1 would make sense, and so I
2175 think the cmd.exe parser of the redirection symbols simply doesn't
2176 care about the < vs > distinction in these cases. Therefore, the
2177 supported features are explicitly documented below.
2179 The emulation below aims at supporting all the valid use cases
2180 supported by cmd.exe, which include:
2182 < FILE redirect standard input from FILE
2183 0< FILE redirect standard input from FILE
2184 <&N redirect standard input from file descriptor N
2185 0<&N redirect standard input from file descriptor N
2186 > FILE redirect standard output to FILE
2187 >> FILE append standard output to FILE
2188 1>> FILE append standard output to FILE
2189 >&N redirect standard output to file descriptor N
2190 1>&N redirect standard output to file descriptor N
2191 >>&N append standard output to file descriptor N
2192 1>>&N append standard output to file descriptor N
2193 2> FILE redirect standard error to FILE
2194 2>> FILE append standard error to FILE
2195 2>&N redirect standard error to file descriptor N
2196 2>>&N append standard error to file descriptor N
2198 Note that using N > 2 in the above construct is supported, but
2199 requires that the corresponding file descriptor be open by some
2200 means elsewhere or outside GDB. Also note that using ">&0" or
2201 "<&2" will generally fail, because the file descriptor redirected
2202 from is normally open in an incompatible mode (e.g., FD 0 is open
2203 for reading only). IOW, use of such tricks is not recommended;
2204 you are on your own.
2206 We do NOT support redirection of file descriptors above 2, as in
2207 "3>SOME-FILE", because MinGW compiled programs don't (supporting
2208 that needs special handling in the startup code that MinGW
2209 doesn't have). Pipes are also not supported.
2211 As for invalid use cases, where the redirection contains some
2212 error, the emulation below will detect that and produce some
2213 error and/or failure. But the behavior in those cases is not
2214 bug-for-bug compatible with what cmd.exe does in those cases.
2215 That's because what cmd.exe does then is not well defined, and
2216 seems to be a side effect of the cmd.exe parsing of the command
2217 line more than anything else. For example, try redirecting to an
2218 invalid file name, as in "> foo:bar".
2220 There are also minor syntactic deviations from what cmd.exe does
2221 in some corner cases. For example, it doesn't support the likes
2222 of "> &foo" to mean redirect to file named literally "&foo"; we
2223 do support that here, because that, too, sounds like some issue
2224 with the cmd.exe parser. Another nicety is that we support
2225 redirection targets that use file names with forward slashes,
2226 something cmd.exe doesn't -- this comes in handy since GDB
2227 file-name completion can be used when typing the command line for
2230 /* Support routines for redirecting standard handles of the inferior. */
2232 /* Parse a single redirection spec, open/duplicate the specified
2233 file/fd, and assign the appropriate value to one of the 3 standard
2234 file descriptors. */
2236 redir_open (const char *redir_string
, int *inp
, int *out
, int *err
)
2238 int *fd
, ref_fd
= -2;
2240 const char *fname
= redir_string
+ 1;
2241 int rc
= *redir_string
;
2256 fd
= (rc
== '2') ? err
: out
;
2257 mode
= O_WRONLY
| O_CREAT
;
2270 if (*fname
== '&' && '0' <= fname
[1] && fname
[1] <= '9')
2272 /* A reference to a file descriptor. */
2274 ref_fd
= (int) strtol (fname
+ 1, &fdtail
, 10);
2275 if (fdtail
> fname
+ 1 && *fdtail
== '\0')
2277 /* Don't allow redirection when open modes are incompatible. */
2278 if ((ref_fd
== 0 && (fd
== out
|| fd
== err
))
2279 || ((ref_fd
== 1 || ref_fd
== 2) && fd
== inp
))
2286 else if (ref_fd
== 1)
2288 else if (ref_fd
== 2)
2298 fname
++; /* skip the separator space */
2299 /* If the descriptor is already open, close it. This allows
2300 multiple specs of redirections for the same stream, which is
2301 somewhat nonsensical, but still valid and supported by cmd.exe.
2302 (But cmd.exe only opens a single file in this case, the one
2303 specified by the last redirection spec on the command line.) */
2308 *fd
= _open (fname
, mode
, _S_IREAD
| _S_IWRITE
);
2312 else if (ref_fd
== -1)
2313 *fd
= -1; /* reset to default destination */
2316 *fd
= _dup (ref_fd
);
2320 /* _open just sets a flag for O_APPEND, which won't be passed to the
2321 inferior, so we need to actually move the file pointer. */
2322 if ((mode
& O_APPEND
) != 0)
2323 _lseek (*fd
, 0L, SEEK_END
);
2327 /* Canonicalize a single redirection spec and set up the corresponding
2328 file descriptor as specified. */
2330 redir_set_redirection (const char *s
, int *inp
, int *out
, int *err
)
2332 char buf
[__PMAX
+ 2 + 5]; /* extra space for quotes & redirection string */
2334 const char *start
= s
;
2337 *d
++ = *s
++; /* copy the 1st character, < or > or a digit */
2338 if ((*start
== '>' || *start
== '1' || *start
== '2')
2342 if (*s
== '>' && *start
!= '>')
2345 else if (*start
== '0' && *s
== '<')
2347 /* cmd.exe recognizes "&N" only immediately after the redirection symbol. */
2350 while (isspace (*s
)) /* skip whitespace before file name */
2352 *d
++ = ' '; /* separate file name with a single space */
2355 /* Copy the file name. */
2358 /* Remove quoting characters from the file name in buf[]. */
2359 if (*s
== '"') /* could support '..' quoting here */
2363 else if (*s
== quote
)
2371 else if (*s
== '\\')
2373 if (s
[1] == '"') /* could support '..' here */
2377 else if (isspace (*s
) && !quote
)
2381 if (d
- buf
>= sizeof (buf
) - 1)
2383 errno
= ENAMETOOLONG
;
2389 /* Windows doesn't allow redirection characters in file names, so we
2390 can bail out early if they use them, or if there's no target file
2391 name after the redirection symbol. */
2392 if (d
[-1] == '>' || d
[-1] == '<')
2397 if (redir_open (buf
, inp
, out
, err
) == 0)
2402 /* Parse the command line for redirection specs and prepare the file
2403 descriptors for the 3 standard streams accordingly. */
2405 redirect_inferior_handles (const char *cmd_orig
, char *cmd
,
2406 int *inp
, int *out
, int *err
)
2408 const char *s
= cmd_orig
;
2411 bool retval
= false;
2413 while (isspace (*s
))
2418 if (*s
== '"') /* could also support '..' quoting here */
2422 else if (*s
== quote
)
2425 else if (*s
== '\\')
2427 if (s
[1] == '"') /* escaped quote char */
2432 /* Process a single redirection candidate. */
2433 if (*s
== '<' || *s
== '>'
2434 || ((*s
== '1' || *s
== '2') && s
[1] == '>')
2435 || (*s
== '0' && s
[1] == '<'))
2437 int skip
= redir_set_redirection (s
, inp
, out
, err
);
2451 #endif /* !__CYGWIN__ */
2453 /* Start an inferior windows child process and sets inferior_ptid to its pid.
2454 EXEC_FILE is the file to run.
2455 ALLARGS is a string containing the arguments to the program.
2456 ENV is the environment vector to pass. Errors reported with error(). */
2459 windows_nat_target::create_inferior (const char *exec_file
,
2460 const std::string
&origallargs
,
2461 char **in_env
, int from_tty
)
2465 cygwin_buf_t real_path
[__PMAX
];
2466 cygwin_buf_t shell
[__PMAX
]; /* Path to shell */
2467 cygwin_buf_t infcwd
[__PMAX
];
2469 cygwin_buf_t
*toexec
;
2470 cygwin_buf_t
*cygallargs
;
2472 char **old_env
= NULL
;
2476 int ostdin
, ostdout
, ostderr
;
2477 #else /* !__CYGWIN__ */
2478 char shell
[__PMAX
]; /* Path to shell */
2480 char *args
, *allargs_copy
;
2481 size_t args_len
, allargs_len
;
2482 int fd_inp
= -1, fd_out
= -1, fd_err
= -1;
2483 HANDLE tty
= INVALID_HANDLE_VALUE
;
2484 bool redirected
= false;
2491 #endif /* !__CYGWIN__ */
2492 const char *allargs
= origallargs
.c_str ();
2493 PROCESS_INFORMATION pi
;
2496 const std::string
&inferior_tty
= current_inferior ()->tty ();
2499 error (_("No executable specified, use `target exec'."));
2501 const char *inferior_cwd
= current_inferior ()->cwd ().c_str ();
2502 std::string expanded_infcwd
;
2503 if (*inferior_cwd
== '\0')
2504 inferior_cwd
= nullptr;
2507 expanded_infcwd
= gdb_tilde_expand (inferior_cwd
);
2508 /* Mirror slashes on inferior's cwd. */
2509 std::replace (expanded_infcwd
.begin (), expanded_infcwd
.end (),
2511 inferior_cwd
= expanded_infcwd
.c_str ();
2514 memset (&si
, 0, sizeof (si
));
2515 si
.cb
= sizeof (si
);
2518 flags
|= CREATE_NEW_PROCESS_GROUP
;
2521 windows_set_console_info (&si
, &flags
);
2526 flags
|= DEBUG_ONLY_THIS_PROCESS
;
2527 if (cygwin_conv_path (CCP_POSIX_TO_WIN_W
, exec_file
, real_path
,
2528 __PMAX
* sizeof (cygwin_buf_t
)) < 0)
2529 error (_("Error starting executable: %d"), errno
);
2532 len
= mbstowcs (NULL
, allargs
, 0) + 1;
2533 if (len
== (size_t) -1)
2534 error (_("Error starting executable: %d"), errno
);
2535 cygallargs
= (wchar_t *) alloca (len
* sizeof (wchar_t));
2536 mbstowcs (cygallargs
, allargs
, len
);
2537 #else /* !__USEWIDE */
2538 cygallargs
= allargs
;
2544 if (cygwin_conv_path (CCP_POSIX_TO_WIN_W
, sh
, shell
, __PMAX
) < 0)
2545 error (_("Error starting executable via shell: %d"), errno
);
2547 len
= sizeof (L
" -c 'exec '") + mbstowcs (NULL
, exec_file
, 0)
2548 + mbstowcs (NULL
, allargs
, 0) + 2;
2549 cygallargs
= (wchar_t *) alloca (len
* sizeof (wchar_t));
2550 swprintf (cygallargs
, len
, L
" -c 'exec %s %s'", exec_file
, allargs
);
2551 #else /* !__USEWIDE */
2552 len
= (sizeof (" -c 'exec '") + strlen (exec_file
)
2553 + strlen (allargs
) + 2);
2554 cygallargs
= (char *) alloca (len
);
2555 xsnprintf (cygallargs
, len
, " -c 'exec %s %s'", exec_file
, allargs
);
2556 #endif /* __USEWIDE */
2558 flags
|= DEBUG_PROCESS
;
2561 if (inferior_cwd
!= NULL
2562 && cygwin_conv_path (CCP_POSIX_TO_WIN_W
, inferior_cwd
,
2563 infcwd
, strlen (inferior_cwd
)) < 0)
2564 error (_("Error converting inferior cwd: %d"), errno
);
2567 args
= (cygwin_buf_t
*) alloca ((wcslen (toexec
) + wcslen (cygallargs
) + 2)
2568 * sizeof (wchar_t));
2569 wcscpy (args
, toexec
);
2570 wcscat (args
, L
" ");
2571 wcscat (args
, cygallargs
);
2572 #else /* !__USEWIDE */
2573 args
= (cygwin_buf_t
*) alloca (strlen (toexec
) + strlen (cygallargs
) + 2);
2574 strcpy (args
, toexec
);
2576 strcat (args
, cygallargs
);
2577 #endif /* !__USEWIDE */
2579 #ifdef CW_CVT_ENV_TO_WINENV
2580 /* First try to create a direct Win32 copy of the POSIX environment. */
2581 w32_env
= (PWCHAR
) cygwin_internal (CW_CVT_ENV_TO_WINENV
, in_env
);
2582 if (w32_env
!= (PWCHAR
) -1)
2583 flags
|= CREATE_UNICODE_ENVIRONMENT
;
2585 /* If that fails, fall back to old method tweaking GDB's environment. */
2586 #endif /* CW_CVT_ENV_TO_WINENV */
2588 /* Reset all Win32 environment variables to avoid leftover on next run. */
2589 clear_win32_environment (environ
);
2590 /* Prepare the environment vars for CreateProcess. */
2593 cygwin_internal (CW_SYNC_WINENV
);
2597 if (inferior_tty
.empty ())
2598 tty
= ostdin
= ostdout
= ostderr
= -1;
2601 tty
= open (inferior_tty
.c_str (), O_RDWR
| O_NOCTTY
);
2604 print_sys_errmsg (inferior_tty
.c_str (), errno
);
2605 ostdin
= ostdout
= ostderr
= -1;
2618 windows_init_thread_list ();
2619 ret
= CreateProcess (0,
2620 args
, /* command line */
2621 NULL
, /* Security */
2623 TRUE
, /* inherit handles */
2624 flags
, /* start flags */
2625 w32_env
, /* environment */
2626 inferior_cwd
!= NULL
? infcwd
: NULL
, /* current
2631 /* Just free the Win32 environment, if it could be created. */
2635 /* Reset all environment variables to avoid leftover on next run. */
2636 clear_win32_environment (in_env
);
2637 /* Restore normal GDB environment variables. */
2639 cygwin_internal (CW_SYNC_WINENV
);
2652 #else /* !__CYGWIN__ */
2653 allargs_len
= strlen (allargs
);
2654 allargs_copy
= strcpy ((char *) alloca (allargs_len
+ 1), allargs
);
2655 if (strpbrk (allargs_copy
, "<>") != NULL
)
2660 redirect_inferior_handles (allargs
, allargs_copy
,
2661 &fd_inp
, &fd_out
, &fd_err
);
2663 warning (_("Error in redirection: %s."), safe_strerror (errno
));
2666 allargs_len
= strlen (allargs_copy
);
2668 /* If not all the standard streams are redirected by the command
2669 line, use INFERIOR_TTY for those which aren't. */
2670 if (!inferior_tty
.empty ()
2671 && !(fd_inp
>= 0 && fd_out
>= 0 && fd_err
>= 0))
2673 SECURITY_ATTRIBUTES sa
;
2674 sa
.nLength
= sizeof(sa
);
2675 sa
.lpSecurityDescriptor
= 0;
2676 sa
.bInheritHandle
= TRUE
;
2677 tty
= CreateFileA (inferior_tty
.c_str (), GENERIC_READ
| GENERIC_WRITE
,
2678 0, &sa
, OPEN_EXISTING
, FILE_ATTRIBUTE_NORMAL
, 0);
2679 if (tty
== INVALID_HANDLE_VALUE
)
2680 warning (_("Warning: Failed to open TTY %s, error %#x."),
2681 inferior_tty
.c_str (), (unsigned) GetLastError ());
2683 if (redirected
|| tty
!= INVALID_HANDLE_VALUE
)
2686 si
.hStdInput
= (HANDLE
) _get_osfhandle (fd_inp
);
2687 else if (tty
!= INVALID_HANDLE_VALUE
)
2690 si
.hStdInput
= GetStdHandle (STD_INPUT_HANDLE
);
2692 si
.hStdOutput
= (HANDLE
) _get_osfhandle (fd_out
);
2693 else if (tty
!= INVALID_HANDLE_VALUE
)
2694 si
.hStdOutput
= tty
;
2696 si
.hStdOutput
= GetStdHandle (STD_OUTPUT_HANDLE
);
2698 si
.hStdError
= (HANDLE
) _get_osfhandle (fd_err
);
2699 else if (tty
!= INVALID_HANDLE_VALUE
)
2702 si
.hStdError
= GetStdHandle (STD_ERROR_HANDLE
);
2703 si
.dwFlags
|= STARTF_USESTDHANDLES
;
2707 /* Build the command line, a space-separated list of tokens where
2708 the first token is the name of the module to be executed.
2709 To avoid ambiguities introduced by spaces in the module name,
2711 args_len
= strlen (toexec
) + 2 /* quotes */ + allargs_len
+ 2;
2712 args
= (char *) alloca (args_len
);
2713 xsnprintf (args
, args_len
, "\"%s\" %s", toexec
, allargs_copy
);
2715 flags
|= DEBUG_ONLY_THIS_PROCESS
;
2717 /* CreateProcess takes the environment list as a null terminated set of
2718 strings (i.e. two nulls terminate the list). */
2720 /* Get total size for env strings. */
2721 for (envlen
= 0, i
= 0; in_env
[i
] && *in_env
[i
]; i
++)
2722 envlen
+= strlen (in_env
[i
]) + 1;
2724 envsize
= sizeof (in_env
[0]) * (i
+ 1);
2725 env
= (char **) alloca (envsize
);
2726 memcpy (env
, in_env
, envsize
);
2727 /* Windows programs expect the environment block to be sorted. */
2728 qsort (env
, i
, sizeof (char *), envvar_cmp
);
2730 w32env
= (char *) alloca (envlen
+ 1);
2732 /* Copy env strings into new buffer. */
2733 for (temp
= w32env
, i
= 0; env
[i
] && *env
[i
]; i
++)
2735 strcpy (temp
, env
[i
]);
2736 temp
+= strlen (temp
) + 1;
2739 /* Final nil string to terminate new env. */
2742 windows_init_thread_list ();
2743 ret
= CreateProcessA (0,
2744 args
, /* command line */
2745 NULL
, /* Security */
2747 TRUE
, /* inherit handles */
2748 flags
, /* start flags */
2749 w32env
, /* environment */
2750 inferior_cwd
, /* current directory */
2753 if (tty
!= INVALID_HANDLE_VALUE
)
2761 #endif /* !__CYGWIN__ */
2764 error (_("Error creating process %s, (error %u)."),
2765 exec_file
, (unsigned) GetLastError ());
2769 if (IsWow64Process (pi
.hProcess
, &wow64
))
2770 wow64_process
= wow64
;
2773 CloseHandle (pi
.hThread
);
2774 CloseHandle (pi
.hProcess
);
2776 if (useshell
&& shell
[0] != '\0')
2781 do_initial_windows_stuff (pi
.dwProcessId
, 0);
2783 /* windows_continue (DBG_CONTINUE, -1, 0); */
2787 windows_nat_target::mourn_inferior ()
2789 (void) windows_continue (DBG_CONTINUE
, -1, 0);
2790 x86_cleanup_dregs();
2791 if (open_process_used
)
2793 CHECK (CloseHandle (current_process_handle
));
2794 open_process_used
= 0;
2796 siginfo_er
.ExceptionCode
= 0;
2797 inf_child_target::mourn_inferior ();
2800 /* Send a SIGINT to the process group. This acts just like the user typed a
2801 ^C on the controlling terminal. */
2804 windows_nat_target::interrupt ()
2806 DEBUG_EVENTS ("GenerateConsoleCtrlEvent (CTRLC_EVENT, 0)");
2807 CHECK (GenerateConsoleCtrlEvent (CTRL_C_EVENT
, current_event
.dwProcessId
));
2808 registers_changed (); /* refresh register state */
2811 /* Helper for windows_xfer_partial that handles memory transfers.
2812 Arguments are like target_xfer_partial. */
2814 static enum target_xfer_status
2815 windows_xfer_memory (gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
2816 ULONGEST memaddr
, ULONGEST len
, ULONGEST
*xfered_len
)
2820 DWORD lasterror
= 0;
2822 if (writebuf
!= NULL
)
2824 DEBUG_MEM ("write target memory, %s bytes at %s",
2825 pulongest (len
), core_addr_to_string (memaddr
));
2826 success
= WriteProcessMemory (current_process_handle
,
2827 (LPVOID
) (uintptr_t) memaddr
, writebuf
,
2830 lasterror
= GetLastError ();
2831 FlushInstructionCache (current_process_handle
,
2832 (LPCVOID
) (uintptr_t) memaddr
, len
);
2836 DEBUG_MEM ("read target memory, %s bytes at %s",
2837 pulongest (len
), core_addr_to_string (memaddr
));
2838 success
= ReadProcessMemory (current_process_handle
,
2839 (LPCVOID
) (uintptr_t) memaddr
, readbuf
,
2842 lasterror
= GetLastError ();
2844 *xfered_len
= (ULONGEST
) done
;
2845 if (!success
&& lasterror
== ERROR_PARTIAL_COPY
&& done
> 0)
2846 return TARGET_XFER_OK
;
2848 return success
? TARGET_XFER_OK
: TARGET_XFER_E_IO
;
2852 windows_nat_target::kill ()
2854 CHECK (TerminateProcess (current_process_handle
, 0));
2858 if (!windows_continue (DBG_CONTINUE
, -1, 1))
2860 if (!wait_for_debug_event (¤t_event
, INFINITE
))
2862 if (current_event
.dwDebugEventCode
== EXIT_PROCESS_DEBUG_EVENT
)
2866 target_mourn_inferior (inferior_ptid
); /* Or just windows_mourn_inferior? */
2870 windows_nat_target::close ()
2872 DEBUG_EVENTS ("inferior_ptid=%d\n", inferior_ptid
.pid ());
2875 /* Convert pid to printable format. */
2877 windows_nat_target::pid_to_str (ptid_t ptid
)
2879 if (ptid
.lwp () != 0)
2880 return string_printf ("Thread %d.0x%lx", ptid
.pid (), ptid
.lwp ());
2882 return normal_pid_to_str (ptid
);
2885 static enum target_xfer_status
2886 windows_xfer_shared_libraries (struct target_ops
*ops
,
2887 enum target_object object
, const char *annex
,
2888 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
2889 ULONGEST offset
, ULONGEST len
,
2890 ULONGEST
*xfered_len
)
2892 struct obstack obstack
;
2898 return TARGET_XFER_E_IO
;
2900 obstack_init (&obstack
);
2901 obstack_grow_str (&obstack
, "<library-list>\n");
2902 for (so
= solib_start
.next
; so
; so
= so
->next
)
2904 lm_info_windows
*li
= (lm_info_windows
*) so
->lm_info
;
2906 windows_xfer_shared_library (so
->so_name
, (CORE_ADDR
)
2907 (uintptr_t) li
->load_addr
,
2909 target_gdbarch (), &obstack
);
2911 obstack_grow_str0 (&obstack
, "</library-list>\n");
2913 buf
= (const char *) obstack_finish (&obstack
);
2914 len_avail
= strlen (buf
);
2915 if (offset
>= len_avail
)
2919 if (len
> len_avail
- offset
)
2920 len
= len_avail
- offset
;
2921 memcpy (readbuf
, buf
+ offset
, len
);
2924 obstack_free (&obstack
, NULL
);
2925 *xfered_len
= (ULONGEST
) len
;
2926 return len
!= 0 ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
2929 /* Helper for windows_nat_target::xfer_partial that handles signal info. */
2931 static enum target_xfer_status
2932 windows_xfer_siginfo (gdb_byte
*readbuf
, ULONGEST offset
, ULONGEST len
,
2933 ULONGEST
*xfered_len
)
2935 char *buf
= (char *) &siginfo_er
;
2936 size_t bufsize
= sizeof (siginfo_er
);
2939 EXCEPTION_RECORD32 er32
;
2942 buf
= (char *) &er32
;
2943 bufsize
= sizeof (er32
);
2945 er32
.ExceptionCode
= siginfo_er
.ExceptionCode
;
2946 er32
.ExceptionFlags
= siginfo_er
.ExceptionFlags
;
2947 er32
.ExceptionRecord
= (uintptr_t) siginfo_er
.ExceptionRecord
;
2948 er32
.ExceptionAddress
= (uintptr_t) siginfo_er
.ExceptionAddress
;
2949 er32
.NumberParameters
= siginfo_er
.NumberParameters
;
2951 for (i
= 0; i
< EXCEPTION_MAXIMUM_PARAMETERS
; i
++)
2952 er32
.ExceptionInformation
[i
] = siginfo_er
.ExceptionInformation
[i
];
2956 if (siginfo_er
.ExceptionCode
== 0)
2957 return TARGET_XFER_E_IO
;
2959 if (readbuf
== nullptr)
2960 return TARGET_XFER_E_IO
;
2962 if (offset
> bufsize
)
2963 return TARGET_XFER_E_IO
;
2965 if (offset
+ len
> bufsize
)
2966 len
= bufsize
- offset
;
2968 memcpy (readbuf
, buf
+ offset
, len
);
2971 return TARGET_XFER_OK
;
2974 enum target_xfer_status
2975 windows_nat_target::xfer_partial (enum target_object object
,
2976 const char *annex
, gdb_byte
*readbuf
,
2977 const gdb_byte
*writebuf
, ULONGEST offset
,
2978 ULONGEST len
, ULONGEST
*xfered_len
)
2982 case TARGET_OBJECT_MEMORY
:
2983 return windows_xfer_memory (readbuf
, writebuf
, offset
, len
, xfered_len
);
2985 case TARGET_OBJECT_LIBRARIES
:
2986 return windows_xfer_shared_libraries (this, object
, annex
, readbuf
,
2987 writebuf
, offset
, len
, xfered_len
);
2989 case TARGET_OBJECT_SIGNAL_INFO
:
2990 return windows_xfer_siginfo (readbuf
, offset
, len
, xfered_len
);
2993 if (beneath () == NULL
)
2995 /* This can happen when requesting the transfer of unsupported
2996 objects before a program has been started (and therefore
2997 with the current_target having no target beneath). */
2998 return TARGET_XFER_E_IO
;
3000 return beneath ()->xfer_partial (object
, annex
,
3001 readbuf
, writebuf
, offset
, len
,
3006 /* Provide thread local base, i.e. Thread Information Block address.
3007 Returns 1 if ptid is found and sets *ADDR to thread_local_base. */
3010 windows_nat_target::get_tib_address (ptid_t ptid
, CORE_ADDR
*addr
)
3012 windows_thread_info
*th
;
3014 th
= thread_rec (ptid
, DONT_INVALIDATE_CONTEXT
);
3019 *addr
= th
->thread_local_base
;
3025 windows_nat_target::get_ada_task_ptid (long lwp
, ULONGEST thread
)
3027 return ptid_t (inferior_ptid
.pid (), lwp
, 0);
3030 /* Implementation of the to_thread_name method. */
3033 windows_nat_target::thread_name (struct thread_info
*thr
)
3035 return thread_rec (thr
->ptid
, DONT_INVALIDATE_CONTEXT
)->name
.get ();
3039 void _initialize_windows_nat ();
3041 _initialize_windows_nat ()
3043 x86_dr_low
.set_control
= cygwin_set_dr7
;
3044 x86_dr_low
.set_addr
= cygwin_set_dr
;
3045 x86_dr_low
.get_addr
= cygwin_get_dr
;
3046 x86_dr_low
.get_status
= cygwin_get_dr6
;
3047 x86_dr_low
.get_control
= cygwin_get_dr7
;
3049 /* x86_dr_low.debug_register_length field is set by
3050 calling x86_set_debug_register_length function
3051 in processor windows specific native file. */
3053 add_inf_child_target (&the_windows_nat_target
);
3056 cygwin_internal (CW_SET_DOS_FILE_WARNING
, 0);
3059 add_com ("signal-event", class_run
, signal_event_command
, _("\
3060 Signal a crashed process with event ID, to allow its debugging.\n\
3061 This command is needed in support of setting up GDB as JIT debugger on \
3062 MS-Windows. The command should be invoked from the GDB command line using \
3063 the '-ex' command-line option. The ID of the event that blocks the \
3064 crashed process will be supplied by the Windows JIT debugging mechanism."));
3067 add_setshow_boolean_cmd ("shell", class_support
, &useshell
, _("\
3068 Set use of shell to start subprocess."), _("\
3069 Show use of shell to start subprocess."), NULL
,
3071 NULL
, /* FIXME: i18n: */
3072 &setlist
, &showlist
);
3074 add_setshow_boolean_cmd ("cygwin-exceptions", class_support
,
3075 &cygwin_exceptions
, _("\
3076 Break when an exception is detected in the Cygwin DLL itself."), _("\
3077 Show whether gdb breaks on exceptions in the Cygwin DLL itself."), NULL
,
3079 NULL
, /* FIXME: i18n: */
3080 &setlist
, &showlist
);
3083 add_setshow_boolean_cmd ("new-console", class_support
, &new_console
, _("\
3084 Set creation of new console when creating child process."), _("\
3085 Show creation of new console when creating child process."), NULL
,
3087 NULL
, /* FIXME: i18n: */
3088 &setlist
, &showlist
);
3090 add_setshow_boolean_cmd ("new-group", class_support
, &new_group
, _("\
3091 Set creation of new group when creating child process."), _("\
3092 Show creation of new group when creating child process."), NULL
,
3094 NULL
, /* FIXME: i18n: */
3095 &setlist
, &showlist
);
3097 add_setshow_boolean_cmd ("debugexec", class_support
, &debug_exec
, _("\
3098 Set whether to display execution in child process."), _("\
3099 Show whether to display execution in child process."), NULL
,
3101 NULL
, /* FIXME: i18n: */
3102 &setlist
, &showlist
);
3104 add_setshow_boolean_cmd ("debugevents", class_support
, &debug_events
, _("\
3105 Set whether to display kernel events in child process."), _("\
3106 Show whether to display kernel events in child process."), NULL
,
3108 NULL
, /* FIXME: i18n: */
3109 &setlist
, &showlist
);
3111 add_setshow_boolean_cmd ("debugmemory", class_support
, &debug_memory
, _("\
3112 Set whether to display memory accesses in child process."), _("\
3113 Show whether to display memory accesses in child process."), NULL
,
3115 NULL
, /* FIXME: i18n: */
3116 &setlist
, &showlist
);
3118 add_setshow_boolean_cmd ("debugexceptions", class_support
,
3119 &debug_exceptions
, _("\
3120 Set whether to display kernel exceptions in child process."), _("\
3121 Show whether to display kernel exceptions in child process."), NULL
,
3123 NULL
, /* FIXME: i18n: */
3124 &setlist
, &showlist
);
3126 init_w32_command_list ();
3128 add_cmd ("selector", class_info
, display_selectors
,
3129 _("Display selectors infos."),
3132 if (!initialize_loadable ())
3134 /* This will probably fail on Windows 9x/Me. Let the user know
3135 that we're missing some functionality. */
3137 cannot automatically find executable file or library to read symbols.\n\
3138 Use \"file\" or \"dll\" command to load executable/libraries directly."));
3142 /* Hardware watchpoint support, adapted from go32-nat.c code. */
3144 /* Pass the address ADDR to the inferior in the I'th debug register.
3145 Here we just store the address in dr array, the registers will be
3146 actually set up when windows_continue is called. */
3148 cygwin_set_dr (int i
, CORE_ADDR addr
)
3151 internal_error (__FILE__
, __LINE__
,
3152 _("Invalid register %d in cygwin_set_dr.\n"), i
);
3155 for (windows_thread_info
*th
: thread_list
)
3156 th
->debug_registers_changed
= true;
3159 /* Pass the value VAL to the inferior in the DR7 debug control
3160 register. Here we just store the address in D_REGS, the watchpoint
3161 will be actually set up in windows_wait. */
3163 cygwin_set_dr7 (unsigned long val
)
3165 dr
[7] = (CORE_ADDR
) val
;
3167 for (windows_thread_info
*th
: thread_list
)
3168 th
->debug_registers_changed
= true;
3171 /* Get the value of debug register I from the inferior. */
3174 cygwin_get_dr (int i
)
3179 /* Get the value of the DR6 debug status register from the inferior.
3180 Here we just return the value stored in dr[6]
3181 by the last call to thread_rec for current_event.dwThreadId id. */
3182 static unsigned long
3183 cygwin_get_dr6 (void)
3185 return (unsigned long) dr
[6];
3188 /* Get the value of the DR7 debug status register from the inferior.
3189 Here we just return the value stored in dr[7] by the last call to
3190 thread_rec for current_event.dwThreadId id. */
3192 static unsigned long
3193 cygwin_get_dr7 (void)
3195 return (unsigned long) dr
[7];
3198 /* Determine if the thread referenced by "ptid" is alive
3199 by "polling" it. If WaitForSingleObject returns WAIT_OBJECT_0
3200 it means that the thread has died. Otherwise it is assumed to be alive. */
3203 windows_nat_target::thread_alive (ptid_t ptid
)
3205 gdb_assert (ptid
.lwp () != 0);
3207 return (WaitForSingleObject (thread_rec (ptid
, DONT_INVALIDATE_CONTEXT
)->h
, 0)
3211 void _initialize_check_for_gdb_ini ();
3213 _initialize_check_for_gdb_ini ()
3216 if (inhibit_gdbinit
)
3219 homedir
= getenv ("HOME");
3223 char *oldini
= (char *) alloca (strlen (homedir
) +
3224 sizeof ("gdb.ini") + 1);
3225 strcpy (oldini
, homedir
);
3226 p
= strchr (oldini
, '\0');
3227 if (p
> oldini
&& !IS_DIR_SEPARATOR (p
[-1]))
3229 strcpy (p
, "gdb.ini");
3230 if (access (oldini
, 0) == 0)
3232 int len
= strlen (oldini
);
3233 char *newini
= (char *) alloca (len
+ 2);
3235 xsnprintf (newini
, len
+ 2, "%.*s.gdbinit",
3236 (int) (len
- (sizeof ("gdb.ini") - 1)), oldini
);
3237 warning (_("obsolete '%s' found. Rename to '%s'."), oldini
, newini
);