1 /* Target-vector operations for controlling windows child processes, for GDB.
3 Copyright (C) 1995-2020 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>
48 #include "filenames.h"
52 #include "gdb_obstack.h"
53 #include "gdbthread.h"
59 #include "xml-support.h"
62 #include "i386-tdep.h"
63 #include "i387-tdep.h"
65 #include "windows-tdep.h"
66 #include "windows-nat.h"
68 #include "complaints.h"
69 #include "inf-child.h"
70 #include "gdbsupport/gdb_tilde_expand.h"
71 #include "gdbsupport/pathstuff.h"
72 #include "gdbsupport/gdb_wait.h"
73 #include "nat/windows-nat.h"
75 using namespace windows_nat
;
77 #define AdjustTokenPrivileges dyn_AdjustTokenPrivileges
78 #define DebugActiveProcessStop dyn_DebugActiveProcessStop
79 #define DebugBreakProcess dyn_DebugBreakProcess
80 #define DebugSetProcessKillOnExit dyn_DebugSetProcessKillOnExit
81 #define EnumProcessModules dyn_EnumProcessModules
82 #define EnumProcessModulesEx dyn_EnumProcessModulesEx
83 #define GetModuleInformation dyn_GetModuleInformation
84 #define LookupPrivilegeValueA dyn_LookupPrivilegeValueA
85 #define OpenProcessToken dyn_OpenProcessToken
86 #define GetConsoleFontSize dyn_GetConsoleFontSize
87 #define GetCurrentConsoleFont dyn_GetCurrentConsoleFont
88 #define Wow64SuspendThread dyn_Wow64SuspendThread
89 #define Wow64GetThreadContext dyn_Wow64GetThreadContext
90 #define Wow64SetThreadContext dyn_Wow64SetThreadContext
91 #define Wow64GetThreadSelectorEntry dyn_Wow64GetThreadSelectorEntry
93 typedef BOOL
WINAPI (AdjustTokenPrivileges_ftype
) (HANDLE
, BOOL
,
95 DWORD
, PTOKEN_PRIVILEGES
,
97 static AdjustTokenPrivileges_ftype
*AdjustTokenPrivileges
;
99 typedef BOOL
WINAPI (DebugActiveProcessStop_ftype
) (DWORD
);
100 static DebugActiveProcessStop_ftype
*DebugActiveProcessStop
;
102 typedef BOOL
WINAPI (DebugBreakProcess_ftype
) (HANDLE
);
103 static DebugBreakProcess_ftype
*DebugBreakProcess
;
105 typedef BOOL
WINAPI (DebugSetProcessKillOnExit_ftype
) (BOOL
);
106 static DebugSetProcessKillOnExit_ftype
*DebugSetProcessKillOnExit
;
108 typedef BOOL
WINAPI (EnumProcessModules_ftype
) (HANDLE
, HMODULE
*, DWORD
,
110 static EnumProcessModules_ftype
*EnumProcessModules
;
113 typedef BOOL
WINAPI (EnumProcessModulesEx_ftype
) (HANDLE
, HMODULE
*, DWORD
,
115 static EnumProcessModulesEx_ftype
*EnumProcessModulesEx
;
118 typedef BOOL
WINAPI (GetModuleInformation_ftype
) (HANDLE
, HMODULE
,
119 LPMODULEINFO
, DWORD
);
120 static GetModuleInformation_ftype
*GetModuleInformation
;
122 typedef BOOL
WINAPI (LookupPrivilegeValueA_ftype
) (LPCSTR
, LPCSTR
, PLUID
);
123 static LookupPrivilegeValueA_ftype
*LookupPrivilegeValueA
;
125 typedef BOOL
WINAPI (OpenProcessToken_ftype
) (HANDLE
, DWORD
, PHANDLE
);
126 static OpenProcessToken_ftype
*OpenProcessToken
;
128 typedef BOOL
WINAPI (GetCurrentConsoleFont_ftype
) (HANDLE
, BOOL
,
129 CONSOLE_FONT_INFO
*);
130 static GetCurrentConsoleFont_ftype
*GetCurrentConsoleFont
;
132 typedef COORD
WINAPI (GetConsoleFontSize_ftype
) (HANDLE
, DWORD
);
133 static GetConsoleFontSize_ftype
*GetConsoleFontSize
;
136 typedef DWORD
WINAPI (Wow64SuspendThread_ftype
) (HANDLE
);
137 static Wow64SuspendThread_ftype
*Wow64SuspendThread
;
139 typedef BOOL
WINAPI (Wow64GetThreadContext_ftype
) (HANDLE
, PWOW64_CONTEXT
);
140 static Wow64GetThreadContext_ftype
*Wow64GetThreadContext
;
142 typedef BOOL
WINAPI (Wow64SetThreadContext_ftype
) (HANDLE
,
143 const WOW64_CONTEXT
*);
144 static Wow64SetThreadContext_ftype
*Wow64SetThreadContext
;
146 typedef BOOL
WINAPI (Wow64GetThreadSelectorEntry_ftype
) (HANDLE
, DWORD
,
148 static Wow64GetThreadSelectorEntry_ftype
*Wow64GetThreadSelectorEntry
;
153 #undef GetModuleFileNameEx
156 # define __PMAX (MAX_PATH + 1)
157 typedef DWORD
WINAPI (GetModuleFileNameEx_ftype
) (HANDLE
, HMODULE
, LPSTR
, DWORD
);
158 static GetModuleFileNameEx_ftype
*GetModuleFileNameEx
;
159 # define STARTUPINFO STARTUPINFOA
160 # define CreateProcess CreateProcessA
161 # define GetModuleFileNameEx_name "GetModuleFileNameExA"
162 # define bad_GetModuleFileNameEx bad_GetModuleFileNameExA
164 # define __PMAX PATH_MAX
165 /* The starting and ending address of the cygwin1.dll text segment. */
166 static CORE_ADDR cygwin_load_start
;
167 static CORE_ADDR cygwin_load_end
;
169 typedef wchar_t cygwin_buf_t
;
170 typedef DWORD
WINAPI (GetModuleFileNameEx_ftype
) (HANDLE
, HMODULE
,
172 static GetModuleFileNameEx_ftype
*GetModuleFileNameEx
;
173 # define STARTUPINFO STARTUPINFOW
174 # define CreateProcess CreateProcessW
175 # define GetModuleFileNameEx_name "GetModuleFileNameExW"
176 # define bad_GetModuleFileNameEx bad_GetModuleFileNameExW
179 static int have_saved_context
; /* True if we've saved context from a
182 static CONTEXT saved_context
; /* Contains the saved context from a
186 /* If we're not using the old Cygwin header file set, define the
187 following which never should have been in the generic Win32 API
188 headers in the first place since they were our own invention... */
189 #ifndef _GNU_H_WINDOWS_H
192 FLAG_TRACE_BIT
= 0x100,
196 #ifndef CONTEXT_EXTENDED_REGISTERS
197 /* This macro is only defined on ia32. It only makes sense on this target,
198 so define it as zero if not already defined. */
199 #define CONTEXT_EXTENDED_REGISTERS 0
202 #define CONTEXT_DEBUGGER_DR CONTEXT_FULL | CONTEXT_FLOATING_POINT \
203 | CONTEXT_SEGMENTS | CONTEXT_DEBUG_REGISTERS \
204 | CONTEXT_EXTENDED_REGISTERS
206 static uintptr_t dr
[8];
207 static int debug_registers_changed
;
208 static int debug_registers_used
;
210 static int windows_initialization_done
;
211 #define DR6_CLEAR_VALUE 0xffff0ff0
213 /* The string sent by cygwin when it processes a signal.
214 FIXME: This should be in a cygwin include file. */
215 #ifndef _CYGWIN_SIGNAL_STRING
216 #define _CYGWIN_SIGNAL_STRING "cYgSiGw00f"
219 #define CHECK(x) check (x, __FILE__,__LINE__)
220 #define DEBUG_EXEC(x) if (debug_exec) printf_unfiltered x
221 #define DEBUG_EVENTS(x) if (debug_events) printf_unfiltered x
222 #define DEBUG_MEM(x) if (debug_memory) printf_unfiltered x
223 #define DEBUG_EXCEPT(x) if (debug_exceptions) printf_unfiltered x
225 static void cygwin_set_dr (int i
, CORE_ADDR addr
);
226 static void cygwin_set_dr7 (unsigned long val
);
227 static CORE_ADDR
cygwin_get_dr (int i
);
228 static unsigned long cygwin_get_dr6 (void);
229 static unsigned long cygwin_get_dr7 (void);
231 static std::vector
<windows_thread_info
*> thread_list
;
233 /* Counts of things. */
234 static int saw_create
;
235 static int open_process_used
= 0;
237 static bool wow64_process
= false;
238 static bool ignore_first_breakpoint
= false;
242 static bool new_console
= false;
244 static bool cygwin_exceptions
= false;
246 static bool new_group
= true;
247 static bool debug_exec
= false; /* show execution */
248 static bool debug_events
= false; /* show events from kernel */
249 static bool debug_memory
= false; /* show target memory accesses */
250 static bool debug_exceptions
= false; /* show target exceptions */
251 static bool useshell
= false; /* use shell for subprocesses */
253 /* This vector maps GDB's idea of a register's number into an offset
254 in the windows exception context vector.
256 It also contains the bit mask needed to load the register in question.
258 The contents of this table can only be computed by the units
259 that provide CPU-specific support for Windows native debugging.
260 These units should set the table by calling
261 windows_set_context_register_offsets.
263 One day we could read a reg, we could inspect the context we
264 already have loaded, if it doesn't have the bit set that we need,
265 we read that set of registers in using GetThreadContext. If the
266 context already contains what we need, we just unpack it. Then to
267 write a register, first we have to ensure that the context contains
268 the other regs of the group, and then we copy the info in and set
271 static const int *mappings
;
273 /* The function to use in order to determine whether a register is
274 a segment register or not. */
275 static segment_register_p_ftype
*segment_register_p
;
277 /* See windows_nat_target::resume to understand why this is commented
280 /* This vector maps the target's idea of an exception (extracted
281 from the DEBUG_EVENT structure) to GDB's idea. */
283 struct xlate_exception
289 static const struct xlate_exception xlate
[] =
291 {EXCEPTION_ACCESS_VIOLATION
, GDB_SIGNAL_SEGV
},
292 {STATUS_STACK_OVERFLOW
, GDB_SIGNAL_SEGV
},
293 {EXCEPTION_BREAKPOINT
, GDB_SIGNAL_TRAP
},
294 {DBG_CONTROL_C
, GDB_SIGNAL_INT
},
295 {EXCEPTION_SINGLE_STEP
, GDB_SIGNAL_TRAP
},
296 {STATUS_FLOAT_DIVIDE_BY_ZERO
, GDB_SIGNAL_FPE
}
301 struct windows_nat_target final
: public x86_nat_target
<inf_child_target
>
303 void close () override
;
305 void attach (const char *, int) override
;
307 bool attach_no_wait () override
310 void detach (inferior
*, int) override
;
312 void resume (ptid_t
, int , enum gdb_signal
) override
;
314 ptid_t
wait (ptid_t
, struct target_waitstatus
*, int) override
;
316 void fetch_registers (struct regcache
*, int) override
;
317 void store_registers (struct regcache
*, int) override
;
319 bool stopped_by_sw_breakpoint () override
321 return current_windows_thread
->stopped_at_software_breakpoint
;
324 bool supports_stopped_by_sw_breakpoint () override
329 enum target_xfer_status
xfer_partial (enum target_object object
,
332 const gdb_byte
*writebuf
,
333 ULONGEST offset
, ULONGEST len
,
334 ULONGEST
*xfered_len
) override
;
336 void files_info () override
;
338 void kill () override
;
340 void create_inferior (const char *, const std::string
&,
341 char **, int) override
;
343 void mourn_inferior () override
;
345 bool thread_alive (ptid_t ptid
) override
;
347 std::string
pid_to_str (ptid_t
) override
;
349 void interrupt () override
;
351 char *pid_to_exec_file (int pid
) override
;
353 ptid_t
get_ada_task_ptid (long lwp
, long thread
) override
;
355 bool get_tib_address (ptid_t ptid
, CORE_ADDR
*addr
) override
;
357 const char *thread_name (struct thread_info
*) override
;
359 int get_windows_debug_event (int pid
, struct target_waitstatus
*ourstatus
);
362 static windows_nat_target the_windows_nat_target
;
364 /* Set the MAPPINGS static global to OFFSETS.
365 See the description of MAPPINGS for more details. */
368 windows_set_context_register_offsets (const int *offsets
)
373 /* Set the function that should be used by this module to determine
374 whether a given register is a segment register or not. */
377 windows_set_segment_register_p (segment_register_p_ftype
*fun
)
379 segment_register_p
= fun
;
383 check (BOOL ok
, const char *file
, int line
)
386 printf_filtered ("error return %s:%d was %u\n", file
, line
,
387 (unsigned) GetLastError ());
390 /* See nat/windows-nat.h. */
392 windows_thread_info
*
393 windows_nat::thread_rec (ptid_t ptid
, thread_disposition_type disposition
)
395 for (windows_thread_info
*th
: thread_list
)
396 if (th
->tid
== ptid
.lwp ())
402 case DONT_INVALIDATE_CONTEXT
:
405 case INVALIDATE_CONTEXT
:
406 if (ptid
.lwp () != current_event
.dwThreadId
)
408 th
->reload_context
= true;
411 th
->reload_context
= true;
422 /* Add a thread to the thread list.
424 PTID is the ptid of the thread to be added.
425 H is its Windows handle.
426 TLB is its thread local base.
427 MAIN_THREAD_P should be true if the thread to be added is
428 the main thread, false otherwise. */
430 static windows_thread_info
*
431 windows_add_thread (ptid_t ptid
, HANDLE h
, void *tlb
, bool main_thread_p
)
433 windows_thread_info
*th
;
435 gdb_assert (ptid
.lwp () != 0);
437 if ((th
= thread_rec (ptid
, DONT_INVALIDATE_CONTEXT
)))
440 CORE_ADDR base
= (CORE_ADDR
) (uintptr_t) tlb
;
442 /* For WOW64 processes, this is actually the pointer to the 64bit TIB,
443 and the 32bit TIB is exactly 2 pages after it. */
447 th
= new windows_thread_info (ptid
.lwp (), h
, base
);
448 thread_list
.push_back (th
);
450 /* Add this new thread to the list of threads.
452 To be consistent with what's done on other platforms, we add
453 the main thread silently (in reality, this thread is really
454 more of a process to the user than a thread). */
456 add_thread_silent (&the_windows_nat_target
, ptid
);
458 add_thread (&the_windows_nat_target
, ptid
);
460 /* Set the debug registers for the new thread if they are used. */
461 if (debug_registers_used
)
466 /* Only change the value of the debug registers. */
467 th
->wow64_context
.ContextFlags
= CONTEXT_DEBUG_REGISTERS
;
468 CHECK (Wow64GetThreadContext (th
->h
, &th
->wow64_context
));
469 th
->wow64_context
.Dr0
= dr
[0];
470 th
->wow64_context
.Dr1
= dr
[1];
471 th
->wow64_context
.Dr2
= dr
[2];
472 th
->wow64_context
.Dr3
= dr
[3];
473 th
->wow64_context
.Dr6
= DR6_CLEAR_VALUE
;
474 th
->wow64_context
.Dr7
= dr
[7];
475 CHECK (Wow64SetThreadContext (th
->h
, &th
->wow64_context
));
476 th
->wow64_context
.ContextFlags
= 0;
481 /* Only change the value of the debug registers. */
482 th
->context
.ContextFlags
= CONTEXT_DEBUG_REGISTERS
;
483 CHECK (GetThreadContext (th
->h
, &th
->context
));
484 th
->context
.Dr0
= dr
[0];
485 th
->context
.Dr1
= dr
[1];
486 th
->context
.Dr2
= dr
[2];
487 th
->context
.Dr3
= dr
[3];
488 th
->context
.Dr6
= DR6_CLEAR_VALUE
;
489 th
->context
.Dr7
= dr
[7];
490 CHECK (SetThreadContext (th
->h
, &th
->context
));
491 th
->context
.ContextFlags
= 0;
497 /* Clear out any old thread list and reinitialize it to a
500 windows_init_thread_list (void)
502 DEBUG_EVENTS (("gdb: windows_init_thread_list\n"));
505 for (windows_thread_info
*here
: thread_list
)
508 thread_list
.clear ();
511 /* Delete a thread from the list of threads.
513 PTID is the ptid of the thread to be deleted.
514 EXIT_CODE is the thread's exit code.
515 MAIN_THREAD_P should be true if the thread to be deleted is
516 the main thread, false otherwise. */
519 windows_delete_thread (ptid_t ptid
, DWORD exit_code
, bool main_thread_p
)
523 gdb_assert (ptid
.lwp () != 0);
527 /* Emit a notification about the thread being deleted.
529 Note that no notification was printed when the main thread
530 was created, and thus, unless in verbose mode, we should be
531 symmetrical, and avoid that notification for the main thread
535 printf_unfiltered ("[Deleting %s]\n", target_pid_to_str (ptid
).c_str ());
536 else if (print_thread_events
&& !main_thread_p
)
537 printf_unfiltered (_("[%s exited with code %u]\n"),
538 target_pid_to_str (ptid
).c_str (),
539 (unsigned) exit_code
);
541 delete_thread (find_thread_ptid (&the_windows_nat_target
, ptid
));
543 auto iter
= std::find_if (thread_list
.begin (), thread_list
.end (),
544 [=] (windows_thread_info
*th
)
546 return th
->tid
== id
;
549 if (iter
!= thread_list
.end ())
552 thread_list
.erase (iter
);
556 /* Fetches register number R from the given windows_thread_info,
557 and supplies its value to the given regcache.
559 This function assumes that R is non-negative. A failed assertion
560 is raised if that is not true.
562 This function assumes that TH->RELOAD_CONTEXT is not set, meaning
563 that the windows_thread_info has an up-to-date context. A failed
564 assertion is raised if that assumption is violated. */
567 windows_fetch_one_register (struct regcache
*regcache
,
568 windows_thread_info
*th
, int r
)
571 gdb_assert (!th
->reload_context
);
573 char *context_ptr
= (char *) &th
->context
;
576 context_ptr
= (char *) &th
->wow64_context
;
579 char *context_offset
= context_ptr
+ mappings
[r
];
580 struct gdbarch
*gdbarch
= regcache
->arch ();
581 struct gdbarch_tdep
*tdep
= gdbarch_tdep (gdbarch
);
583 gdb_assert (!gdbarch_read_pc_p (gdbarch
));
584 gdb_assert (gdbarch_pc_regnum (gdbarch
) >= 0);
585 gdb_assert (!gdbarch_write_pc_p (gdbarch
));
587 if (r
== I387_FISEG_REGNUM (tdep
))
589 long l
= *((long *) context_offset
) & 0xffff;
590 regcache
->raw_supply (r
, (char *) &l
);
592 else if (r
== I387_FOP_REGNUM (tdep
))
594 long l
= (*((long *) context_offset
) >> 16) & ((1 << 11) - 1);
595 regcache
->raw_supply (r
, (char *) &l
);
597 else if (segment_register_p (r
))
599 /* GDB treats segment registers as 32bit registers, but they are
600 in fact only 16 bits long. Make sure we do not read extra
601 bits from our source buffer. */
602 long l
= *((long *) context_offset
) & 0xffff;
603 regcache
->raw_supply (r
, (char *) &l
);
607 if (th
->stopped_at_software_breakpoint
608 && r
== gdbarch_pc_regnum (gdbarch
))
610 int size
= register_size (gdbarch
, r
);
614 memcpy (&value
, context_offset
, size
);
615 value
-= gdbarch_decr_pc_after_break (gdbarch
);
616 memcpy (context_offset
, &value
, size
);
620 gdb_assert (size
== 8);
622 memcpy (&value
, context_offset
, size
);
623 value
-= gdbarch_decr_pc_after_break (gdbarch
);
624 memcpy (context_offset
, &value
, size
);
627 regcache
->raw_supply (r
, context_offset
);
632 windows_nat_target::fetch_registers (struct regcache
*regcache
, int r
)
634 windows_thread_info
*th
= thread_rec (regcache
->ptid (), INVALIDATE_CONTEXT
);
636 /* Check if TH exists. Windows sometimes uses a non-existent
637 thread id in its events. */
641 if (th
->reload_context
)
644 if (have_saved_context
)
646 /* Lie about where the program actually is stopped since
647 cygwin has informed us that we should consider the signal
648 to have occurred at another location which is stored in
650 memcpy (&th
->context
, &saved_context
,
651 __COPY_CONTEXT_SIZE
);
652 have_saved_context
= 0;
659 th
->wow64_context
.ContextFlags
= CONTEXT_DEBUGGER_DR
;
660 CHECK (Wow64GetThreadContext (th
->h
, &th
->wow64_context
));
661 /* Copy dr values from that thread.
662 But only if there were not modified since last stop.
664 if (!debug_registers_changed
)
666 dr
[0] = th
->wow64_context
.Dr0
;
667 dr
[1] = th
->wow64_context
.Dr1
;
668 dr
[2] = th
->wow64_context
.Dr2
;
669 dr
[3] = th
->wow64_context
.Dr3
;
670 dr
[6] = th
->wow64_context
.Dr6
;
671 dr
[7] = th
->wow64_context
.Dr7
;
677 th
->context
.ContextFlags
= CONTEXT_DEBUGGER_DR
;
678 CHECK (GetThreadContext (th
->h
, &th
->context
));
679 /* Copy dr values from that thread.
680 But only if there were not modified since last stop.
682 if (!debug_registers_changed
)
684 dr
[0] = th
->context
.Dr0
;
685 dr
[1] = th
->context
.Dr1
;
686 dr
[2] = th
->context
.Dr2
;
687 dr
[3] = th
->context
.Dr3
;
688 dr
[6] = th
->context
.Dr6
;
689 dr
[7] = th
->context
.Dr7
;
692 th
->reload_context
= false;
696 for (r
= 0; r
< gdbarch_num_regs (regcache
->arch()); r
++)
697 windows_fetch_one_register (regcache
, th
, r
);
699 windows_fetch_one_register (regcache
, th
, r
);
702 /* Collect the register number R from the given regcache, and store
703 its value into the corresponding area of the given thread's context.
705 This function assumes that R is non-negative. A failed assertion
706 assertion is raised if that is not true. */
709 windows_store_one_register (const struct regcache
*regcache
,
710 windows_thread_info
*th
, int r
)
714 char *context_ptr
= (char *) &th
->context
;
717 context_ptr
= (char *) &th
->wow64_context
;
720 regcache
->raw_collect (r
, context_ptr
+ mappings
[r
]);
723 /* Store a new register value into the context of the thread tied to
727 windows_nat_target::store_registers (struct regcache
*regcache
, int r
)
729 windows_thread_info
*th
= thread_rec (regcache
->ptid (), INVALIDATE_CONTEXT
);
731 /* Check if TH exists. Windows sometimes uses a non-existent
732 thread id in its events. */
737 for (r
= 0; r
< gdbarch_num_regs (regcache
->arch ()); r
++)
738 windows_store_one_register (regcache
, th
, r
);
740 windows_store_one_register (regcache
, th
, r
);
743 /* Maintain a linked list of "so" information. */
744 struct lm_info_windows
: public lm_info_base
746 LPVOID load_addr
= 0;
747 CORE_ADDR text_offset
= 0;
750 static struct so_list solib_start
, *solib_end
;
752 static struct so_list
*
753 windows_make_so (const char *name
, LPVOID load_addr
)
760 WIN32_FIND_DATA w32_fd
;
761 HANDLE h
= FindFirstFile(name
, &w32_fd
);
763 if (h
== INVALID_HANDLE_VALUE
)
769 if (GetCurrentDirectory (MAX_PATH
+ 1, cwd
))
771 p
= strrchr (buf
, '\\');
774 SetCurrentDirectory (buf
);
775 GetFullPathName (w32_fd
.cFileName
, MAX_PATH
, buf
, &p
);
776 SetCurrentDirectory (cwd
);
779 if (strcasecmp (buf
, "ntdll.dll") == 0)
781 GetSystemDirectory (buf
, sizeof (buf
));
782 strcat (buf
, "\\ntdll.dll");
785 cygwin_buf_t buf
[__PMAX
];
788 if (access (name
, F_OK
) != 0)
790 if (strcasecmp (name
, "ntdll.dll") == 0)
793 GetSystemDirectoryW (buf
, sizeof (buf
) / sizeof (wchar_t));
794 wcscat (buf
, L
"\\ntdll.dll");
798 GetSystemDirectoryA (buf
, sizeof (buf
) / sizeof (wchar_t));
799 strcat (buf
, "\\ntdll.dll");
804 so
= XCNEW (struct so_list
);
805 lm_info_windows
*li
= new lm_info_windows
;
807 li
->load_addr
= load_addr
;
808 strcpy (so
->so_original_name
, name
);
810 strcpy (so
->so_name
, buf
);
813 cygwin_conv_path (CCP_WIN_W_TO_POSIX
, buf
, so
->so_name
,
814 SO_NAME_MAX_PATH_SIZE
);
817 char *rname
= realpath (name
, NULL
);
818 if (rname
&& strlen (rname
) < SO_NAME_MAX_PATH_SIZE
)
820 strcpy (so
->so_name
, rname
);
824 error (_("dll path too long"));
826 /* Record cygwin1.dll .text start/end. */
827 p
= strchr (so
->so_name
, '\0') - (sizeof ("/cygwin1.dll") - 1);
828 if (p
>= so
->so_name
&& strcasecmp (p
, "/cygwin1.dll") == 0)
830 asection
*text
= NULL
;
832 gdb_bfd_ref_ptr
abfd (gdb_bfd_open (so
->so_name
, "pei-i386", -1));
837 if (bfd_check_format (abfd
.get (), bfd_object
))
838 text
= bfd_get_section_by_name (abfd
.get (), ".text");
843 /* The symbols in a dll are offset by 0x1000, which is the
844 offset from 0 of the first byte in an image - because of the
845 file header and the section alignment. */
846 cygwin_load_start
= (CORE_ADDR
) (uintptr_t) ((char *)
848 cygwin_load_end
= cygwin_load_start
+ bfd_section_size (text
);
855 /* See nat/windows-nat.h. */
858 windows_nat::handle_load_dll ()
860 LOAD_DLL_DEBUG_INFO
*event
= ¤t_event
.u
.LoadDll
;
861 const char *dll_name
;
863 /* Try getting the DLL name via the lpImageName field of the event.
864 Note that Microsoft documents this fields as strictly optional,
865 in the sense that it might be NULL. And the first DLL event in
866 particular is explicitly documented as "likely not pass[ed]"
867 (source: MSDN LOAD_DLL_DEBUG_INFO structure). */
868 dll_name
= get_image_name (current_process_handle
,
869 event
->lpImageName
, event
->fUnicode
);
873 solib_end
->next
= windows_make_so (dll_name
, event
->lpBaseOfDll
);
874 solib_end
= solib_end
->next
;
876 lm_info_windows
*li
= (lm_info_windows
*) solib_end
->lm_info
;
878 DEBUG_EVENTS (("gdb: Loading dll \"%s\" at %s.\n", solib_end
->so_name
,
879 host_address_to_string (li
->load_addr
)));
883 windows_free_so (struct so_list
*so
)
885 lm_info_windows
*li
= (lm_info_windows
*) so
->lm_info
;
891 /* See nat/windows-nat.h. */
894 windows_nat::handle_unload_dll ()
896 LPVOID lpBaseOfDll
= current_event
.u
.UnloadDll
.lpBaseOfDll
;
899 for (so
= &solib_start
; so
->next
!= NULL
; so
= so
->next
)
901 lm_info_windows
*li_next
= (lm_info_windows
*) so
->next
->lm_info
;
903 if (li_next
->load_addr
== lpBaseOfDll
)
905 struct so_list
*sodel
= so
->next
;
907 so
->next
= sodel
->next
;
910 DEBUG_EVENTS (("gdb: Unloading dll \"%s\".\n", sodel
->so_name
));
912 windows_free_so (sodel
);
917 /* We did not find any DLL that was previously loaded at this address,
918 so register a complaint. We do not report an error, because we have
919 observed that this may be happening under some circumstances. For
920 instance, running 32bit applications on x64 Windows causes us to receive
921 4 mysterious UNLOAD_DLL_DEBUG_EVENTs during the startup phase (these
922 events are apparently caused by the WOW layer, the interface between
923 32bit and 64bit worlds). */
924 complaint (_("dll starting at %s not found."),
925 host_address_to_string (lpBaseOfDll
));
928 /* Call FUNC wrapped in a TRY/CATCH that swallows all GDB
932 catch_errors (void (*func
) ())
938 catch (const gdb_exception
&ex
)
940 exception_print (gdb_stderr
, ex
);
944 /* Clear list of loaded DLLs. */
946 windows_clear_solib (void)
950 for (so
= solib_start
.next
; so
; so
= solib_start
.next
)
952 solib_start
.next
= so
->next
;
953 windows_free_so (so
);
956 solib_end
= &solib_start
;
960 signal_event_command (const char *args
, int from_tty
)
962 uintptr_t event_id
= 0;
963 char *endargs
= NULL
;
966 error (_("signal-event requires an argument (integer event id)"));
968 event_id
= strtoumax (args
, &endargs
, 10);
970 if ((errno
== ERANGE
) || (event_id
== 0) || (event_id
> UINTPTR_MAX
) ||
971 ((HANDLE
) event_id
== INVALID_HANDLE_VALUE
))
972 error (_("Failed to convert `%s' to event id"), args
);
974 SetEvent ((HANDLE
) event_id
);
975 CloseHandle ((HANDLE
) event_id
);
978 /* See nat/windows-nat.h. */
981 windows_nat::handle_output_debug_string (struct target_waitstatus
*ourstatus
)
983 gdb::unique_xmalloc_ptr
<char> s
;
986 if (!target_read_string
987 ((CORE_ADDR
) (uintptr_t) current_event
.u
.DebugString
.lpDebugStringData
,
989 || !s
|| !*(s
.get ()))
991 else if (!startswith (s
.get (), _CYGWIN_SIGNAL_STRING
))
994 if (!startswith (s
.get (), "cYg"))
997 char *p
= strchr (s
.get (), '\0');
999 if (p
> s
.get () && *--p
== '\n')
1001 warning (("%s"), s
.get ());
1007 /* Got a cygwin signal marker. A cygwin signal is followed by
1008 the signal number itself and then optionally followed by the
1009 thread id and address to saved context within the DLL. If
1010 these are supplied, then the given thread is assumed to have
1011 issued the signal and the context from the thread is assumed
1012 to be stored at the given address in the inferior. Tell gdb
1013 to treat this like a real signal. */
1015 int sig
= strtol (s
.get () + sizeof (_CYGWIN_SIGNAL_STRING
) - 1, &p
, 0);
1016 gdb_signal gotasig
= gdb_signal_from_host (sig
);
1018 ourstatus
->value
.sig
= gotasig
;
1024 ourstatus
->kind
= TARGET_WAITKIND_STOPPED
;
1025 retval
= strtoul (p
, &p
, 0);
1027 retval
= current_event
.dwThreadId
;
1028 else if ((x
= (LPCVOID
) (uintptr_t) strtoull (p
, NULL
, 0))
1029 && ReadProcessMemory (current_process_handle
, x
,
1031 __COPY_CONTEXT_SIZE
, &n
)
1032 && n
== __COPY_CONTEXT_SIZE
)
1033 have_saved_context
= 1;
1042 display_selector (HANDLE thread
, DWORD sel
)
1048 ret
= Wow64GetThreadSelectorEntry (thread
, sel
, &info
);
1051 ret
= GetThreadSelectorEntry (thread
, sel
, &info
);
1055 printf_filtered ("0x%03x: ", (unsigned) sel
);
1056 if (!info
.HighWord
.Bits
.Pres
)
1058 puts_filtered ("Segment not present\n");
1061 base
= (info
.HighWord
.Bits
.BaseHi
<< 24) +
1062 (info
.HighWord
.Bits
.BaseMid
<< 16)
1064 limit
= (info
.HighWord
.Bits
.LimitHi
<< 16) + info
.LimitLow
;
1065 if (info
.HighWord
.Bits
.Granularity
)
1066 limit
= (limit
<< 12) | 0xfff;
1067 printf_filtered ("base=0x%08x limit=0x%08x", base
, limit
);
1068 if (info
.HighWord
.Bits
.Default_Big
)
1069 puts_filtered(" 32-bit ");
1071 puts_filtered(" 16-bit ");
1072 switch ((info
.HighWord
.Bits
.Type
& 0xf) >> 1)
1075 puts_filtered ("Data (Read-Only, Exp-up");
1078 puts_filtered ("Data (Read/Write, Exp-up");
1081 puts_filtered ("Unused segment (");
1084 puts_filtered ("Data (Read/Write, Exp-down");
1087 puts_filtered ("Code (Exec-Only, N.Conf");
1090 puts_filtered ("Code (Exec/Read, N.Conf");
1093 puts_filtered ("Code (Exec-Only, Conf");
1096 puts_filtered ("Code (Exec/Read, Conf");
1099 printf_filtered ("Unknown type 0x%lx",
1100 (unsigned long) info
.HighWord
.Bits
.Type
);
1102 if ((info
.HighWord
.Bits
.Type
& 0x1) == 0)
1103 puts_filtered(", N.Acc");
1104 puts_filtered (")\n");
1105 if ((info
.HighWord
.Bits
.Type
& 0x10) == 0)
1106 puts_filtered("System selector ");
1107 printf_filtered ("Priviledge level = %ld. ",
1108 (unsigned long) info
.HighWord
.Bits
.Dpl
);
1109 if (info
.HighWord
.Bits
.Granularity
)
1110 puts_filtered ("Page granular.\n");
1112 puts_filtered ("Byte granular.\n");
1117 DWORD err
= GetLastError ();
1118 if (err
== ERROR_NOT_SUPPORTED
)
1119 printf_filtered ("Function not supported\n");
1121 printf_filtered ("Invalid selector 0x%x.\n", (unsigned) sel
);
1127 display_selectors (const char * args
, int from_tty
)
1129 if (!current_windows_thread
)
1131 puts_filtered ("Impossible to display selectors now.\n");
1139 puts_filtered ("Selector $cs\n");
1140 display_selector (current_windows_thread
->h
,
1141 current_windows_thread
->wow64_context
.SegCs
);
1142 puts_filtered ("Selector $ds\n");
1143 display_selector (current_windows_thread
->h
,
1144 current_windows_thread
->wow64_context
.SegDs
);
1145 puts_filtered ("Selector $es\n");
1146 display_selector (current_windows_thread
->h
,
1147 current_windows_thread
->wow64_context
.SegEs
);
1148 puts_filtered ("Selector $ss\n");
1149 display_selector (current_windows_thread
->h
,
1150 current_windows_thread
->wow64_context
.SegSs
);
1151 puts_filtered ("Selector $fs\n");
1152 display_selector (current_windows_thread
->h
,
1153 current_windows_thread
->wow64_context
.SegFs
);
1154 puts_filtered ("Selector $gs\n");
1155 display_selector (current_windows_thread
->h
,
1156 current_windows_thread
->wow64_context
.SegGs
);
1161 puts_filtered ("Selector $cs\n");
1162 display_selector (current_windows_thread
->h
,
1163 current_windows_thread
->context
.SegCs
);
1164 puts_filtered ("Selector $ds\n");
1165 display_selector (current_windows_thread
->h
,
1166 current_windows_thread
->context
.SegDs
);
1167 puts_filtered ("Selector $es\n");
1168 display_selector (current_windows_thread
->h
,
1169 current_windows_thread
->context
.SegEs
);
1170 puts_filtered ("Selector $ss\n");
1171 display_selector (current_windows_thread
->h
,
1172 current_windows_thread
->context
.SegSs
);
1173 puts_filtered ("Selector $fs\n");
1174 display_selector (current_windows_thread
->h
,
1175 current_windows_thread
->context
.SegFs
);
1176 puts_filtered ("Selector $gs\n");
1177 display_selector (current_windows_thread
->h
,
1178 current_windows_thread
->context
.SegGs
);
1184 sel
= parse_and_eval_long (args
);
1185 printf_filtered ("Selector \"%s\"\n",args
);
1186 display_selector (current_windows_thread
->h
, sel
);
1190 /* See nat/windows-nat.h. */
1193 windows_nat::handle_ms_vc_exception (const EXCEPTION_RECORD
*rec
)
1195 if (rec
->NumberParameters
>= 3
1196 && (rec
->ExceptionInformation
[0] & 0xffffffff) == 0x1000)
1198 DWORD named_thread_id
;
1199 windows_thread_info
*named_thread
;
1200 CORE_ADDR thread_name_target
;
1202 thread_name_target
= rec
->ExceptionInformation
[1];
1203 named_thread_id
= (DWORD
) (0xffffffff & rec
->ExceptionInformation
[2]);
1205 if (named_thread_id
== (DWORD
) -1)
1206 named_thread_id
= current_event
.dwThreadId
;
1208 named_thread
= thread_rec (ptid_t (current_event
.dwProcessId
,
1209 named_thread_id
, 0),
1210 DONT_INVALIDATE_CONTEXT
);
1211 if (named_thread
!= NULL
)
1213 int thread_name_len
;
1214 gdb::unique_xmalloc_ptr
<char> thread_name
;
1216 thread_name_len
= target_read_string (thread_name_target
,
1217 &thread_name
, 1025, NULL
);
1218 if (thread_name_len
> 0)
1220 thread_name
.get ()[thread_name_len
- 1] = '\0';
1221 named_thread
->name
= std::move (thread_name
);
1231 /* Resume thread specified by ID, or all artificially suspended
1232 threads, if we are continuing execution. KILLED non-zero means we
1233 have killed the inferior, so we should ignore weird errors due to
1234 threads shutting down. */
1236 windows_continue (DWORD continue_status
, int id
, int killed
)
1240 desired_stop_thread_id
= id
;
1242 if (matching_pending_stop (debug_events
))
1245 for (windows_thread_info
*th
: thread_list
)
1246 if (id
== -1 || id
== (int) th
->tid
)
1253 if (debug_registers_changed
)
1255 th
->wow64_context
.ContextFlags
|= CONTEXT_DEBUG_REGISTERS
;
1256 th
->wow64_context
.Dr0
= dr
[0];
1257 th
->wow64_context
.Dr1
= dr
[1];
1258 th
->wow64_context
.Dr2
= dr
[2];
1259 th
->wow64_context
.Dr3
= dr
[3];
1260 th
->wow64_context
.Dr6
= DR6_CLEAR_VALUE
;
1261 th
->wow64_context
.Dr7
= dr
[7];
1263 if (th
->wow64_context
.ContextFlags
)
1267 if (GetExitCodeThread (th
->h
, &ec
)
1268 && ec
== STILL_ACTIVE
)
1270 BOOL status
= Wow64SetThreadContext (th
->h
,
1271 &th
->wow64_context
);
1276 th
->wow64_context
.ContextFlags
= 0;
1282 if (debug_registers_changed
)
1284 th
->context
.ContextFlags
|= CONTEXT_DEBUG_REGISTERS
;
1285 th
->context
.Dr0
= dr
[0];
1286 th
->context
.Dr1
= dr
[1];
1287 th
->context
.Dr2
= dr
[2];
1288 th
->context
.Dr3
= dr
[3];
1289 th
->context
.Dr6
= DR6_CLEAR_VALUE
;
1290 th
->context
.Dr7
= dr
[7];
1292 if (th
->context
.ContextFlags
)
1296 if (GetExitCodeThread (th
->h
, &ec
)
1297 && ec
== STILL_ACTIVE
)
1299 BOOL status
= SetThreadContext (th
->h
, &th
->context
);
1304 th
->context
.ContextFlags
= 0;
1311 /* When single-stepping a specific thread, other threads must
1316 res
= continue_last_debug_event (continue_status
, debug_events
);
1319 error (_("Failed to resume program execution"
1320 " (ContinueDebugEvent failed, error %u)"),
1321 (unsigned int) GetLastError ());
1323 debug_registers_changed
= 0;
1327 /* Called in pathological case where Windows fails to send a
1328 CREATE_PROCESS_DEBUG_EVENT after an attach. */
1330 fake_create_process (void)
1332 current_process_handle
= OpenProcess (PROCESS_ALL_ACCESS
, FALSE
,
1333 current_event
.dwProcessId
);
1334 if (current_process_handle
!= NULL
)
1335 open_process_used
= 1;
1338 error (_("OpenProcess call failed, GetLastError = %u"),
1339 (unsigned) GetLastError ());
1340 /* We can not debug anything in that case. */
1342 current_windows_thread
1343 = windows_add_thread (ptid_t (current_event
.dwProcessId
,
1344 current_event
.dwThreadId
, 0),
1345 current_event
.u
.CreateThread
.hThread
,
1346 current_event
.u
.CreateThread
.lpThreadLocalBase
,
1347 true /* main_thread_p */);
1348 return current_event
.dwThreadId
;
1352 windows_nat_target::resume (ptid_t ptid
, int step
, enum gdb_signal sig
)
1354 windows_thread_info
*th
;
1355 DWORD continue_status
= DBG_CONTINUE
;
1357 /* A specific PTID means `step only this thread id'. */
1358 int resume_all
= ptid
== minus_one_ptid
;
1360 /* If we're continuing all threads, it's the current inferior that
1361 should be handled specially. */
1363 ptid
= inferior_ptid
;
1365 if (sig
!= GDB_SIGNAL_0
)
1367 if (current_event
.dwDebugEventCode
!= EXCEPTION_DEBUG_EVENT
)
1369 DEBUG_EXCEPT(("Cannot continue with signal %d here.\n",sig
));
1371 else if (sig
== last_sig
)
1372 continue_status
= DBG_EXCEPTION_NOT_HANDLED
;
1375 /* This code does not seem to work, because
1376 the kernel does probably not consider changes in the ExceptionRecord
1377 structure when passing the exception to the inferior.
1378 Note that this seems possible in the exception handler itself. */
1380 for (const xlate_exception
&x
: xlate
)
1383 current_event
.u
.Exception
.ExceptionRecord
.ExceptionCode
1385 continue_status
= DBG_EXCEPTION_NOT_HANDLED
;
1388 if (continue_status
== DBG_CONTINUE
)
1390 DEBUG_EXCEPT(("Cannot continue with signal %d.\n",sig
));
1394 DEBUG_EXCEPT(("Can only continue with received signal %d.\n",
1398 last_sig
= GDB_SIGNAL_0
;
1400 DEBUG_EXEC (("gdb: windows_resume (pid=%d, tid=0x%x, step=%d, sig=%d);\n",
1401 ptid
.pid (), (unsigned) ptid
.lwp (), step
, sig
));
1403 /* Get context for currently selected thread. */
1404 th
= thread_rec (inferior_ptid
, DONT_INVALIDATE_CONTEXT
);
1412 /* Single step by setting t bit. */
1413 struct regcache
*regcache
= get_current_regcache ();
1414 struct gdbarch
*gdbarch
= regcache
->arch ();
1415 fetch_registers (regcache
, gdbarch_ps_regnum (gdbarch
));
1416 th
->wow64_context
.EFlags
|= FLAG_TRACE_BIT
;
1419 if (th
->wow64_context
.ContextFlags
)
1421 if (debug_registers_changed
)
1423 th
->wow64_context
.Dr0
= dr
[0];
1424 th
->wow64_context
.Dr1
= dr
[1];
1425 th
->wow64_context
.Dr2
= dr
[2];
1426 th
->wow64_context
.Dr3
= dr
[3];
1427 th
->wow64_context
.Dr6
= DR6_CLEAR_VALUE
;
1428 th
->wow64_context
.Dr7
= dr
[7];
1430 CHECK (Wow64SetThreadContext (th
->h
, &th
->wow64_context
));
1431 th
->wow64_context
.ContextFlags
= 0;
1439 /* Single step by setting t bit. */
1440 struct regcache
*regcache
= get_current_regcache ();
1441 struct gdbarch
*gdbarch
= regcache
->arch ();
1442 fetch_registers (regcache
, gdbarch_ps_regnum (gdbarch
));
1443 th
->context
.EFlags
|= FLAG_TRACE_BIT
;
1446 if (th
->context
.ContextFlags
)
1448 if (debug_registers_changed
)
1450 th
->context
.Dr0
= dr
[0];
1451 th
->context
.Dr1
= dr
[1];
1452 th
->context
.Dr2
= dr
[2];
1453 th
->context
.Dr3
= dr
[3];
1454 th
->context
.Dr6
= DR6_CLEAR_VALUE
;
1455 th
->context
.Dr7
= dr
[7];
1457 CHECK (SetThreadContext (th
->h
, &th
->context
));
1458 th
->context
.ContextFlags
= 0;
1463 /* Allow continuing with the same signal that interrupted us.
1464 Otherwise complain. */
1467 windows_continue (continue_status
, -1, 0);
1469 windows_continue (continue_status
, ptid
.lwp (), 0);
1472 /* Ctrl-C handler used when the inferior is not run in the same console. The
1473 handler is in charge of interrupting the inferior using DebugBreakProcess.
1474 Note that this function is not available prior to Windows XP. In this case
1475 we emit a warning. */
1477 ctrl_c_handler (DWORD event_type
)
1479 const int attach_flag
= current_inferior ()->attach_flag
;
1481 /* Only handle Ctrl-C and Ctrl-Break events. Ignore others. */
1482 if (event_type
!= CTRL_C_EVENT
&& event_type
!= CTRL_BREAK_EVENT
)
1485 /* If the inferior and the debugger share the same console, do nothing as
1486 the inferior has also received the Ctrl-C event. */
1487 if (!new_console
&& !attach_flag
)
1490 if (!DebugBreakProcess (current_process_handle
))
1491 warning (_("Could not interrupt program. "
1492 "Press Ctrl-c in the program console."));
1494 /* Return true to tell that Ctrl-C has been handled. */
1498 /* Get the next event from the child. Returns a non-zero thread id if the event
1499 requires handling by WFI (or whatever). */
1502 windows_nat_target::get_windows_debug_event (int pid
,
1503 struct target_waitstatus
*ourstatus
)
1506 DWORD continue_status
, event_code
;
1507 windows_thread_info
*th
;
1508 static windows_thread_info
dummy_thread_info (0, 0, 0);
1509 DWORD thread_id
= 0;
1511 /* If there is a relevant pending stop, report it now. See the
1512 comment by the definition of "pending_stops" for details on why
1514 gdb::optional
<pending_stop
> stop
= fetch_pending_stop (debug_events
);
1515 if (stop
.has_value ())
1517 thread_id
= stop
->thread_id
;
1518 *ourstatus
= stop
->status
;
1520 inferior_ptid
= ptid_t (current_event
.dwProcessId
, thread_id
, 0);
1521 current_windows_thread
= thread_rec (inferior_ptid
,
1522 INVALIDATE_CONTEXT
);
1523 current_windows_thread
->reload_context
= 1;
1528 last_sig
= GDB_SIGNAL_0
;
1530 if (!(debug_event
= wait_for_debug_event (¤t_event
, 1000)))
1533 continue_status
= DBG_CONTINUE
;
1535 event_code
= current_event
.dwDebugEventCode
;
1536 ourstatus
->kind
= TARGET_WAITKIND_SPURIOUS
;
1538 have_saved_context
= 0;
1542 case CREATE_THREAD_DEBUG_EVENT
:
1543 DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=0x%x code=%s)\n",
1544 (unsigned) current_event
.dwProcessId
,
1545 (unsigned) current_event
.dwThreadId
,
1546 "CREATE_THREAD_DEBUG_EVENT"));
1547 if (saw_create
!= 1)
1549 inferior
*inf
= find_inferior_pid (this, current_event
.dwProcessId
);
1550 if (!saw_create
&& inf
->attach_flag
)
1552 /* Kludge around a Windows bug where first event is a create
1553 thread event. Caused when attached process does not have
1555 thread_id
= fake_create_process ();
1561 /* Record the existence of this thread. */
1562 thread_id
= current_event
.dwThreadId
;
1563 th
= windows_add_thread
1564 (ptid_t (current_event
.dwProcessId
, current_event
.dwThreadId
, 0),
1565 current_event
.u
.CreateThread
.hThread
,
1566 current_event
.u
.CreateThread
.lpThreadLocalBase
,
1567 false /* main_thread_p */);
1571 case EXIT_THREAD_DEBUG_EVENT
:
1572 DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=0x%x code=%s)\n",
1573 (unsigned) current_event
.dwProcessId
,
1574 (unsigned) current_event
.dwThreadId
,
1575 "EXIT_THREAD_DEBUG_EVENT"));
1576 windows_delete_thread (ptid_t (current_event
.dwProcessId
,
1577 current_event
.dwThreadId
, 0),
1578 current_event
.u
.ExitThread
.dwExitCode
,
1579 false /* main_thread_p */);
1580 th
= &dummy_thread_info
;
1583 case CREATE_PROCESS_DEBUG_EVENT
:
1584 DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=0x%x code=%s)\n",
1585 (unsigned) current_event
.dwProcessId
,
1586 (unsigned) current_event
.dwThreadId
,
1587 "CREATE_PROCESS_DEBUG_EVENT"));
1588 CloseHandle (current_event
.u
.CreateProcessInfo
.hFile
);
1589 if (++saw_create
!= 1)
1592 current_process_handle
= current_event
.u
.CreateProcessInfo
.hProcess
;
1593 /* Add the main thread. */
1594 th
= windows_add_thread
1595 (ptid_t (current_event
.dwProcessId
,
1596 current_event
.dwThreadId
, 0),
1597 current_event
.u
.CreateProcessInfo
.hThread
,
1598 current_event
.u
.CreateProcessInfo
.lpThreadLocalBase
,
1599 true /* main_thread_p */);
1600 thread_id
= current_event
.dwThreadId
;
1603 case EXIT_PROCESS_DEBUG_EVENT
:
1604 DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=0x%x code=%s)\n",
1605 (unsigned) current_event
.dwProcessId
,
1606 (unsigned) current_event
.dwThreadId
,
1607 "EXIT_PROCESS_DEBUG_EVENT"));
1608 if (!windows_initialization_done
)
1610 target_terminal::ours ();
1611 target_mourn_inferior (inferior_ptid
);
1612 error (_("During startup program exited with code 0x%x."),
1613 (unsigned int) current_event
.u
.ExitProcess
.dwExitCode
);
1615 else if (saw_create
== 1)
1617 windows_delete_thread (ptid_t (current_event
.dwProcessId
,
1618 current_event
.dwThreadId
, 0),
1619 0, true /* main_thread_p */);
1620 DWORD exit_status
= current_event
.u
.ExitProcess
.dwExitCode
;
1621 /* If the exit status looks like a fatal exception, but we
1622 don't recognize the exception's code, make the original
1623 exit status value available, to avoid losing
1626 = WIFSIGNALED (exit_status
) ? WTERMSIG (exit_status
) : -1;
1627 if (exit_signal
== -1)
1629 ourstatus
->kind
= TARGET_WAITKIND_EXITED
;
1630 ourstatus
->value
.integer
= exit_status
;
1634 ourstatus
->kind
= TARGET_WAITKIND_SIGNALLED
;
1635 ourstatus
->value
.sig
= gdb_signal_from_host (exit_signal
);
1637 thread_id
= current_event
.dwThreadId
;
1641 case LOAD_DLL_DEBUG_EVENT
:
1642 DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=0x%x code=%s)\n",
1643 (unsigned) current_event
.dwProcessId
,
1644 (unsigned) current_event
.dwThreadId
,
1645 "LOAD_DLL_DEBUG_EVENT"));
1646 CloseHandle (current_event
.u
.LoadDll
.hFile
);
1647 if (saw_create
!= 1 || ! windows_initialization_done
)
1649 catch_errors (handle_load_dll
);
1650 ourstatus
->kind
= TARGET_WAITKIND_LOADED
;
1651 ourstatus
->value
.integer
= 0;
1652 thread_id
= current_event
.dwThreadId
;
1655 case UNLOAD_DLL_DEBUG_EVENT
:
1656 DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=0x%x code=%s)\n",
1657 (unsigned) current_event
.dwProcessId
,
1658 (unsigned) current_event
.dwThreadId
,
1659 "UNLOAD_DLL_DEBUG_EVENT"));
1660 if (saw_create
!= 1 || ! windows_initialization_done
)
1662 catch_errors (handle_unload_dll
);
1663 ourstatus
->kind
= TARGET_WAITKIND_LOADED
;
1664 ourstatus
->value
.integer
= 0;
1665 thread_id
= current_event
.dwThreadId
;
1668 case EXCEPTION_DEBUG_EVENT
:
1669 DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=0x%x code=%s)\n",
1670 (unsigned) current_event
.dwProcessId
,
1671 (unsigned) current_event
.dwThreadId
,
1672 "EXCEPTION_DEBUG_EVENT"));
1673 if (saw_create
!= 1)
1675 switch (handle_exception (ourstatus
, debug_exceptions
))
1677 case HANDLE_EXCEPTION_UNHANDLED
:
1679 continue_status
= DBG_EXCEPTION_NOT_HANDLED
;
1681 case HANDLE_EXCEPTION_HANDLED
:
1682 thread_id
= current_event
.dwThreadId
;
1684 case HANDLE_EXCEPTION_IGNORED
:
1685 continue_status
= DBG_CONTINUE
;
1690 case OUTPUT_DEBUG_STRING_EVENT
: /* Message from the kernel. */
1691 DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=0x%x code=%s)\n",
1692 (unsigned) current_event
.dwProcessId
,
1693 (unsigned) current_event
.dwThreadId
,
1694 "OUTPUT_DEBUG_STRING_EVENT"));
1695 if (saw_create
!= 1)
1697 thread_id
= handle_output_debug_string (ourstatus
);
1701 if (saw_create
!= 1)
1703 printf_unfiltered ("gdb: kernel event for pid=%u tid=0x%x\n",
1704 (unsigned) current_event
.dwProcessId
,
1705 (unsigned) current_event
.dwThreadId
);
1706 printf_unfiltered (" unknown event code %u\n",
1707 (unsigned) current_event
.dwDebugEventCode
);
1711 if (!thread_id
|| saw_create
!= 1)
1713 CHECK (windows_continue (continue_status
, desired_stop_thread_id
, 0));
1715 else if (desired_stop_thread_id
!= -1 && desired_stop_thread_id
!= thread_id
)
1717 /* Pending stop. See the comment by the definition of
1718 "pending_stops" for details on why this is needed. */
1719 DEBUG_EVENTS (("get_windows_debug_event - "
1720 "unexpected stop in 0x%x (expecting 0x%x)\n",
1721 thread_id
, desired_stop_thread_id
));
1723 if (current_event
.dwDebugEventCode
== EXCEPTION_DEBUG_EVENT
1724 && (current_event
.u
.Exception
.ExceptionRecord
.ExceptionCode
1725 == EXCEPTION_BREAKPOINT
)
1726 && windows_initialization_done
)
1728 ptid_t ptid
= ptid_t (current_event
.dwProcessId
, thread_id
, 0);
1729 th
= thread_rec (ptid
, INVALIDATE_CONTEXT
);
1730 th
->stopped_at_software_breakpoint
= true;
1732 pending_stops
.push_back ({thread_id
, *ourstatus
, current_event
});
1734 CHECK (windows_continue (continue_status
, desired_stop_thread_id
, 0));
1738 inferior_ptid
= ptid_t (current_event
.dwProcessId
, thread_id
, 0);
1739 current_windows_thread
= th
;
1740 if (!current_windows_thread
)
1741 current_windows_thread
= thread_rec (inferior_ptid
,
1742 INVALIDATE_CONTEXT
);
1749 /* Wait for interesting events to occur in the target process. */
1751 windows_nat_target::wait (ptid_t ptid
, struct target_waitstatus
*ourstatus
,
1756 /* We loop when we get a non-standard exception rather than return
1757 with a SPURIOUS because resume can try and step or modify things,
1758 which needs a current_thread->h. But some of these exceptions mark
1759 the birth or death of threads, which mean that the current thread
1760 isn't necessarily what you think it is. */
1766 /* If the user presses Ctrl-c while the debugger is waiting
1767 for an event, he expects the debugger to interrupt his program
1768 and to get the prompt back. There are two possible situations:
1770 - The debugger and the program do not share the console, in
1771 which case the Ctrl-c event only reached the debugger.
1772 In that case, the ctrl_c handler will take care of interrupting
1773 the inferior. Note that this case is working starting with
1774 Windows XP. For Windows 2000, Ctrl-C should be pressed in the
1777 - The debugger and the program share the same console, in which
1778 case both debugger and inferior will receive the Ctrl-c event.
1779 In that case the ctrl_c handler will ignore the event, as the
1780 Ctrl-c event generated inside the inferior will trigger the
1781 expected debug event.
1783 FIXME: brobecker/2008-05-20: If the inferior receives the
1784 signal first and the delay until GDB receives that signal
1785 is sufficiently long, GDB can sometimes receive the SIGINT
1786 after we have unblocked the CTRL+C handler. This would
1787 lead to the debugger stopping prematurely while handling
1788 the new-thread event that comes with the handling of the SIGINT
1789 inside the inferior, and then stop again immediately when
1790 the user tries to resume the execution in the inferior.
1791 This is a classic race that we should try to fix one day. */
1792 SetConsoleCtrlHandler (&ctrl_c_handler
, TRUE
);
1793 retval
= get_windows_debug_event (pid
, ourstatus
);
1794 SetConsoleCtrlHandler (&ctrl_c_handler
, FALSE
);
1798 ptid_t result
= ptid_t (current_event
.dwProcessId
, retval
, 0);
1800 if (current_windows_thread
!= nullptr)
1802 current_windows_thread
->stopped_at_software_breakpoint
= false;
1803 if (current_event
.dwDebugEventCode
== EXCEPTION_DEBUG_EVENT
1804 && (current_event
.u
.Exception
.ExceptionRecord
.ExceptionCode
1805 == EXCEPTION_BREAKPOINT
)
1806 && windows_initialization_done
)
1807 current_windows_thread
->stopped_at_software_breakpoint
= true;
1816 if (deprecated_ui_loop_hook
!= NULL
)
1817 detach
= deprecated_ui_loop_hook (0);
1825 /* Iterate over all DLLs currently mapped by our inferior, and
1826 add them to our list of solibs. */
1829 windows_add_all_dlls (void)
1831 HMODULE dummy_hmodule
;
1839 if (EnumProcessModulesEx (current_process_handle
, &dummy_hmodule
,
1840 sizeof (HMODULE
), &cb_needed
,
1841 LIST_MODULES_32BIT
) == 0)
1847 if (EnumProcessModules (current_process_handle
, &dummy_hmodule
,
1848 sizeof (HMODULE
), &cb_needed
) == 0)
1855 hmodules
= (HMODULE
*) alloca (cb_needed
);
1859 if (EnumProcessModulesEx (current_process_handle
, hmodules
,
1860 cb_needed
, &cb_needed
,
1861 LIST_MODULES_32BIT
) == 0)
1867 if (EnumProcessModules (current_process_handle
, hmodules
,
1868 cb_needed
, &cb_needed
) == 0)
1872 char system_dir
[__PMAX
];
1873 char syswow_dir
[__PMAX
];
1874 size_t system_dir_len
= 0;
1875 bool convert_syswow_dir
= false;
1880 /* This fails on 32bit Windows because it has no SysWOW64 directory,
1881 and in this case a path conversion isn't necessary. */
1882 UINT len
= GetSystemWow64DirectoryA (syswow_dir
, sizeof (syswow_dir
));
1885 /* Check that we have passed a large enough buffer. */
1886 gdb_assert (len
< sizeof (syswow_dir
));
1888 len
= GetSystemDirectoryA (system_dir
, sizeof (system_dir
));
1890 gdb_assert (len
!= 0);
1891 /* Check that we have passed a large enough buffer. */
1892 gdb_assert (len
< sizeof (system_dir
));
1894 strcat (system_dir
, "\\");
1895 strcat (syswow_dir
, "\\");
1896 system_dir_len
= strlen (system_dir
);
1898 convert_syswow_dir
= true;
1902 for (i
= 1; i
< (int) (cb_needed
/ sizeof (HMODULE
)); i
++)
1906 wchar_t dll_name
[__PMAX
];
1907 char dll_name_mb
[__PMAX
];
1909 char dll_name
[__PMAX
];
1912 if (GetModuleInformation (current_process_handle
, hmodules
[i
],
1913 &mi
, sizeof (mi
)) == 0)
1915 if (GetModuleFileNameEx (current_process_handle
, hmodules
[i
],
1916 dll_name
, sizeof (dll_name
)) == 0)
1919 wcstombs (dll_name_mb
, dll_name
, __PMAX
);
1924 /* Convert the DLL path of 32bit processes returned by
1925 GetModuleFileNameEx from the 64bit system directory to the
1926 32bit syswow64 directory if necessary. */
1927 std::string syswow_dll_path
;
1928 if (convert_syswow_dir
1929 && strncasecmp (name
, system_dir
, system_dir_len
) == 0
1930 && strchr (name
+ system_dir_len
, '\\') == nullptr)
1932 syswow_dll_path
= syswow_dir
;
1933 syswow_dll_path
+= name
+ system_dir_len
;
1934 name
= syswow_dll_path
.c_str();
1937 solib_end
->next
= windows_make_so (name
, mi
.lpBaseOfDll
);
1938 solib_end
= solib_end
->next
;
1943 do_initial_windows_stuff (struct target_ops
*ops
, DWORD pid
, int attaching
)
1946 struct inferior
*inf
;
1948 last_sig
= GDB_SIGNAL_0
;
1949 open_process_used
= 0;
1950 debug_registers_changed
= 0;
1951 debug_registers_used
= 0;
1952 for (i
= 0; i
< sizeof (dr
) / sizeof (dr
[0]); i
++)
1955 cygwin_load_start
= cygwin_load_end
= 0;
1957 current_event
.dwProcessId
= pid
;
1958 memset (¤t_event
, 0, sizeof (current_event
));
1959 if (!target_is_pushed (ops
))
1961 disable_breakpoints_in_shlibs ();
1962 windows_clear_solib ();
1963 clear_proceed_status (0);
1964 init_wait_for_inferior ();
1967 ignore_first_breakpoint
= !attaching
&& wow64_process
;
1971 windows_set_context_register_offsets (amd64_mappings
);
1972 windows_set_segment_register_p (amd64_windows_segment_register_p
);
1977 windows_set_context_register_offsets (i386_mappings
);
1978 windows_set_segment_register_p (i386_windows_segment_register_p
);
1981 inf
= current_inferior ();
1982 inferior_appeared (inf
, pid
);
1983 inf
->attach_flag
= attaching
;
1985 /* Make the new process the current inferior, so terminal handling
1986 can rely on it. When attaching, we don't know about any thread
1987 id here, but that's OK --- nothing should be referencing the
1988 current thread until we report an event out of windows_wait. */
1989 inferior_ptid
= ptid_t (pid
);
1991 target_terminal::init ();
1992 target_terminal::inferior ();
1994 windows_initialization_done
= 0;
1998 struct target_waitstatus status
;
2000 ops
->wait (minus_one_ptid
, &status
, 0);
2002 /* Note windows_wait returns TARGET_WAITKIND_SPURIOUS for thread
2004 if (status
.kind
!= TARGET_WAITKIND_LOADED
2005 && status
.kind
!= TARGET_WAITKIND_SPURIOUS
)
2008 ops
->resume (minus_one_ptid
, 0, GDB_SIGNAL_0
);
2011 /* Now that the inferior has been started and all DLLs have been mapped,
2012 we can iterate over all DLLs and load them in.
2014 We avoid doing it any earlier because, on certain versions of Windows,
2015 LOAD_DLL_DEBUG_EVENTs are sometimes not complete. In particular,
2016 we have seen on Windows 8.1 that the ntdll.dll load event does not
2017 include the DLL name, preventing us from creating an associated SO.
2018 A possible explanation is that ntdll.dll might be mapped before
2019 the SO info gets created by the Windows system -- ntdll.dll is
2020 the first DLL to be reported via LOAD_DLL_DEBUG_EVENT and other DLLs
2021 do not seem to suffer from that problem.
2023 Rather than try to work around this sort of issue, it is much
2024 simpler to just ignore DLL load/unload events during the startup
2025 phase, and then process them all in one batch now. */
2026 windows_add_all_dlls ();
2028 windows_initialization_done
= 1;
2032 /* Try to set or remove a user privilege to the current process. Return -1
2033 if that fails, the previous setting of that privilege otherwise.
2035 This code is copied from the Cygwin source code and rearranged to allow
2036 dynamically loading of the needed symbols from advapi32 which is only
2037 available on NT/2K/XP. */
2039 set_process_privilege (const char *privilege
, BOOL enable
)
2041 HANDLE token_hdl
= NULL
;
2043 TOKEN_PRIVILEGES new_priv
, orig_priv
;
2047 if (!OpenProcessToken (GetCurrentProcess (),
2048 TOKEN_QUERY
| TOKEN_ADJUST_PRIVILEGES
,
2052 if (!LookupPrivilegeValueA (NULL
, privilege
, &restore_priv
))
2055 new_priv
.PrivilegeCount
= 1;
2056 new_priv
.Privileges
[0].Luid
= restore_priv
;
2057 new_priv
.Privileges
[0].Attributes
= enable
? SE_PRIVILEGE_ENABLED
: 0;
2059 if (!AdjustTokenPrivileges (token_hdl
, FALSE
, &new_priv
,
2060 sizeof orig_priv
, &orig_priv
, &size
))
2063 /* Disabled, otherwise every `attach' in an unprivileged user session
2064 would raise the "Failed to get SE_DEBUG_NAME privilege" warning in
2065 windows_attach(). */
2066 /* AdjustTokenPrivileges returns TRUE even if the privilege could not
2067 be enabled. GetLastError () returns an correct error code, though. */
2068 if (enable
&& GetLastError () == ERROR_NOT_ALL_ASSIGNED
)
2072 ret
= orig_priv
.Privileges
[0].Attributes
== SE_PRIVILEGE_ENABLED
? 1 : 0;
2076 CloseHandle (token_hdl
);
2081 /* Attach to process PID, then initialize for debugging it. */
2084 windows_nat_target::attach (const char *args
, int from_tty
)
2089 pid
= parse_pid_to_attach (args
);
2091 if (set_process_privilege (SE_DEBUG_NAME
, TRUE
) < 0)
2093 printf_unfiltered ("Warning: Failed to get SE_DEBUG_NAME privilege\n");
2094 printf_unfiltered ("This can cause attach to "
2095 "fail on Windows NT/2K/XP\n");
2098 windows_init_thread_list ();
2099 ok
= DebugActiveProcess (pid
);
2105 /* Try fall back to Cygwin pid. */
2106 pid
= cygwin_internal (CW_CYGWIN_PID_TO_WINPID
, pid
);
2109 ok
= DebugActiveProcess (pid
);
2114 error (_("Can't attach to process %u (error %u)"),
2115 (unsigned) pid
, (unsigned) GetLastError ());
2117 DebugSetProcessKillOnExit (FALSE
);
2121 const char *exec_file
= get_exec_file (0);
2124 printf_unfiltered ("Attaching to program `%s', %s\n", exec_file
,
2125 target_pid_to_str (ptid_t (pid
)).c_str ());
2127 printf_unfiltered ("Attaching to %s\n",
2128 target_pid_to_str (ptid_t (pid
)).c_str ());
2132 HANDLE h
= OpenProcess (PROCESS_QUERY_INFORMATION
, FALSE
, pid
);
2136 if (IsWow64Process (h
, &wow64
))
2137 wow64_process
= wow64
;
2142 do_initial_windows_stuff (this, pid
, 1);
2143 target_terminal::ours ();
2147 windows_nat_target::detach (inferior
*inf
, int from_tty
)
2151 ptid_t ptid
= minus_one_ptid
;
2152 resume (ptid
, 0, GDB_SIGNAL_0
);
2154 if (!DebugActiveProcessStop (current_event
.dwProcessId
))
2156 error (_("Can't detach process %u (error %u)"),
2157 (unsigned) current_event
.dwProcessId
, (unsigned) GetLastError ());
2160 DebugSetProcessKillOnExit (FALSE
);
2162 if (detached
&& from_tty
)
2164 const char *exec_file
= get_exec_file (0);
2167 printf_unfiltered ("Detaching from program: %s, Pid %u\n", exec_file
,
2168 (unsigned) current_event
.dwProcessId
);
2171 x86_cleanup_dregs ();
2172 inferior_ptid
= null_ptid
;
2173 detach_inferior (inf
);
2175 maybe_unpush_target ();
2178 /* Try to determine the executable filename.
2180 EXE_NAME_RET is a pointer to a buffer whose size is EXE_NAME_MAX_LEN.
2182 Upon success, the filename is stored inside EXE_NAME_RET, and
2183 this function returns nonzero.
2185 Otherwise, this function returns zero and the contents of
2186 EXE_NAME_RET is undefined. */
2189 windows_get_exec_module_filename (char *exe_name_ret
, size_t exe_name_max_len
)
2199 if (!EnumProcessModulesEx (current_process_handle
, &dh_buf
,
2200 sizeof (HMODULE
), &cbNeeded
,
2201 LIST_MODULES_32BIT
) || !cbNeeded
)
2207 if (!EnumProcessModules (current_process_handle
, &dh_buf
,
2208 sizeof (HMODULE
), &cbNeeded
) || !cbNeeded
)
2212 /* We know the executable is always first in the list of modules,
2213 which we just fetched. So no need to fetch more. */
2217 /* Cygwin prefers that the path be in /x/y/z format, so extract
2218 the filename into a temporary buffer first, and then convert it
2219 to POSIX format into the destination buffer. */
2220 cygwin_buf_t
*pathbuf
= (cygwin_buf_t
*) alloca (exe_name_max_len
* sizeof (cygwin_buf_t
));
2222 len
= GetModuleFileNameEx (current_process_handle
,
2223 dh_buf
, pathbuf
, exe_name_max_len
);
2225 error (_("Error getting executable filename: %u."),
2226 (unsigned) GetLastError ());
2227 if (cygwin_conv_path (CCP_WIN_W_TO_POSIX
, pathbuf
, exe_name_ret
,
2228 exe_name_max_len
) < 0)
2229 error (_("Error converting executable filename to POSIX: %d."), errno
);
2232 len
= GetModuleFileNameEx (current_process_handle
,
2233 dh_buf
, exe_name_ret
, exe_name_max_len
);
2235 error (_("Error getting executable filename: %u."),
2236 (unsigned) GetLastError ());
2239 return 1; /* success */
2242 /* The pid_to_exec_file target_ops method for this platform. */
2245 windows_nat_target::pid_to_exec_file (int pid
)
2247 static char path
[__PMAX
];
2249 /* Try to find exe name as symlink target of /proc/<pid>/exe. */
2251 char procexe
[sizeof ("/proc/4294967295/exe")];
2253 xsnprintf (procexe
, sizeof (procexe
), "/proc/%u/exe", pid
);
2254 nchars
= readlink (procexe
, path
, sizeof(path
));
2255 if (nchars
> 0 && nchars
< sizeof (path
))
2257 path
[nchars
] = '\0'; /* Got it */
2262 /* If we get here then either Cygwin is hosed, this isn't a Cygwin version
2263 of gdb, or we're trying to debug a non-Cygwin windows executable. */
2264 if (!windows_get_exec_module_filename (path
, sizeof (path
)))
2270 /* Print status information about what we're accessing. */
2273 windows_nat_target::files_info ()
2275 struct inferior
*inf
= current_inferior ();
2277 printf_unfiltered ("\tUsing the running image of %s %s.\n",
2278 inf
->attach_flag
? "attached" : "child",
2279 target_pid_to_str (inferior_ptid
).c_str ());
2282 /* Modify CreateProcess parameters for use of a new separate console.
2284 *FLAGS: DWORD parameter for general process creation flags.
2285 *SI: STARTUPINFO structure, for which the console window size and
2286 console buffer size is filled in if GDB is running in a console.
2287 to create the new console.
2288 The size of the used font is not available on all versions of
2289 Windows OS. Furthermore, the current font might not be the default
2290 font, but this is still better than before.
2291 If the windows and buffer sizes are computed,
2292 SI->DWFLAGS is changed so that this information is used
2293 by CreateProcess function. */
2296 windows_set_console_info (STARTUPINFO
*si
, DWORD
*flags
)
2298 HANDLE hconsole
= CreateFile ("CONOUT$", GENERIC_READ
| GENERIC_WRITE
,
2299 FILE_SHARE_READ
, NULL
, OPEN_EXISTING
, 0, 0);
2301 if (hconsole
!= INVALID_HANDLE_VALUE
)
2303 CONSOLE_SCREEN_BUFFER_INFO sbinfo
;
2305 CONSOLE_FONT_INFO cfi
;
2307 GetCurrentConsoleFont (hconsole
, FALSE
, &cfi
);
2308 font_size
= GetConsoleFontSize (hconsole
, cfi
.nFont
);
2309 GetConsoleScreenBufferInfo(hconsole
, &sbinfo
);
2310 si
->dwXSize
= sbinfo
.srWindow
.Right
- sbinfo
.srWindow
.Left
+ 1;
2311 si
->dwYSize
= sbinfo
.srWindow
.Bottom
- sbinfo
.srWindow
.Top
+ 1;
2313 si
->dwXSize
*= font_size
.X
;
2317 si
->dwYSize
*= font_size
.Y
;
2320 si
->dwXCountChars
= sbinfo
.dwSize
.X
;
2321 si
->dwYCountChars
= sbinfo
.dwSize
.Y
;
2322 si
->dwFlags
|= STARTF_USESIZE
| STARTF_USECOUNTCHARS
;
2324 *flags
|= CREATE_NEW_CONSOLE
;
2328 /* Function called by qsort to sort environment strings. */
2331 envvar_cmp (const void *a
, const void *b
)
2333 const char **p
= (const char **) a
;
2334 const char **q
= (const char **) b
;
2335 return strcasecmp (*p
, *q
);
2341 clear_win32_environment (char **env
)
2345 wchar_t *copy
= NULL
, *equalpos
;
2347 for (i
= 0; env
[i
] && *env
[i
]; i
++)
2349 len
= mbstowcs (NULL
, env
[i
], 0) + 1;
2350 copy
= (wchar_t *) xrealloc (copy
, len
* sizeof (wchar_t));
2351 mbstowcs (copy
, env
[i
], len
);
2352 equalpos
= wcschr (copy
, L
'=');
2355 SetEnvironmentVariableW (copy
, NULL
);
2363 /* Redirection of inferior I/O streams for native MS-Windows programs.
2364 Unlike on Unix, where this is handled by invoking the inferior via
2365 the shell, on MS-Windows we need to emulate the cmd.exe shell.
2367 The official documentation of the cmd.exe redirection features is here:
2369 http://www.microsoft.com/resources/documentation/windows/xp/all/proddocs/en-us/redirection.mspx
2371 (That page talks about Windows XP, but there's no newer
2372 documentation, so we assume later versions of cmd.exe didn't change
2375 Caveat: the documentation on that page seems to include a few lies.
2376 For example, it describes strange constructs 1<&2 and 2<&1, which
2377 seem to work only when 1>&2 resp. 2>&1 would make sense, and so I
2378 think the cmd.exe parser of the redirection symbols simply doesn't
2379 care about the < vs > distinction in these cases. Therefore, the
2380 supported features are explicitly documented below.
2382 The emulation below aims at supporting all the valid use cases
2383 supported by cmd.exe, which include:
2385 < FILE redirect standard input from FILE
2386 0< FILE redirect standard input from FILE
2387 <&N redirect standard input from file descriptor N
2388 0<&N redirect standard input from file descriptor N
2389 > FILE redirect standard output to FILE
2390 >> FILE append standard output to FILE
2391 1>> FILE append standard output to FILE
2392 >&N redirect standard output to file descriptor N
2393 1>&N redirect standard output to file descriptor N
2394 >>&N append standard output to file descriptor N
2395 1>>&N append standard output to file descriptor N
2396 2> FILE redirect standard error to FILE
2397 2>> FILE append standard error to FILE
2398 2>&N redirect standard error to file descriptor N
2399 2>>&N append standard error to file descriptor N
2401 Note that using N > 2 in the above construct is supported, but
2402 requires that the corresponding file descriptor be open by some
2403 means elsewhere or outside GDB. Also note that using ">&0" or
2404 "<&2" will generally fail, because the file descriptor redirected
2405 from is normally open in an incompatible mode (e.g., FD 0 is open
2406 for reading only). IOW, use of such tricks is not recommended;
2407 you are on your own.
2409 We do NOT support redirection of file descriptors above 2, as in
2410 "3>SOME-FILE", because MinGW compiled programs don't (supporting
2411 that needs special handling in the startup code that MinGW
2412 doesn't have). Pipes are also not supported.
2414 As for invalid use cases, where the redirection contains some
2415 error, the emulation below will detect that and produce some
2416 error and/or failure. But the behavior in those cases is not
2417 bug-for-bug compatible with what cmd.exe does in those cases.
2418 That's because what cmd.exe does then is not well defined, and
2419 seems to be a side effect of the cmd.exe parsing of the command
2420 line more than anything else. For example, try redirecting to an
2421 invalid file name, as in "> foo:bar".
2423 There are also minor syntactic deviations from what cmd.exe does
2424 in some corner cases. For example, it doesn't support the likes
2425 of "> &foo" to mean redirect to file named literally "&foo"; we
2426 do support that here, because that, too, sounds like some issue
2427 with the cmd.exe parser. Another nicety is that we support
2428 redirection targets that use file names with forward slashes,
2429 something cmd.exe doesn't -- this comes in handy since GDB
2430 file-name completion can be used when typing the command line for
2433 /* Support routines for redirecting standard handles of the inferior. */
2435 /* Parse a single redirection spec, open/duplicate the specified
2436 file/fd, and assign the appropriate value to one of the 3 standard
2437 file descriptors. */
2439 redir_open (const char *redir_string
, int *inp
, int *out
, int *err
)
2441 int *fd
, ref_fd
= -2;
2443 const char *fname
= redir_string
+ 1;
2444 int rc
= *redir_string
;
2459 fd
= (rc
== '2') ? err
: out
;
2460 mode
= O_WRONLY
| O_CREAT
;
2473 if (*fname
== '&' && '0' <= fname
[1] && fname
[1] <= '9')
2475 /* A reference to a file descriptor. */
2477 ref_fd
= (int) strtol (fname
+ 1, &fdtail
, 10);
2478 if (fdtail
> fname
+ 1 && *fdtail
== '\0')
2480 /* Don't allow redirection when open modes are incompatible. */
2481 if ((ref_fd
== 0 && (fd
== out
|| fd
== err
))
2482 || ((ref_fd
== 1 || ref_fd
== 2) && fd
== inp
))
2489 else if (ref_fd
== 1)
2491 else if (ref_fd
== 2)
2501 fname
++; /* skip the separator space */
2502 /* If the descriptor is already open, close it. This allows
2503 multiple specs of redirections for the same stream, which is
2504 somewhat nonsensical, but still valid and supported by cmd.exe.
2505 (But cmd.exe only opens a single file in this case, the one
2506 specified by the last redirection spec on the command line.) */
2511 *fd
= _open (fname
, mode
, _S_IREAD
| _S_IWRITE
);
2515 else if (ref_fd
== -1)
2516 *fd
= -1; /* reset to default destination */
2519 *fd
= _dup (ref_fd
);
2523 /* _open just sets a flag for O_APPEND, which won't be passed to the
2524 inferior, so we need to actually move the file pointer. */
2525 if ((mode
& O_APPEND
) != 0)
2526 _lseek (*fd
, 0L, SEEK_END
);
2530 /* Canonicalize a single redirection spec and set up the corresponding
2531 file descriptor as specified. */
2533 redir_set_redirection (const char *s
, int *inp
, int *out
, int *err
)
2535 char buf
[__PMAX
+ 2 + 5]; /* extra space for quotes & redirection string */
2537 const char *start
= s
;
2540 *d
++ = *s
++; /* copy the 1st character, < or > or a digit */
2541 if ((*start
== '>' || *start
== '1' || *start
== '2')
2545 if (*s
== '>' && *start
!= '>')
2548 else if (*start
== '0' && *s
== '<')
2550 /* cmd.exe recognizes "&N" only immediately after the redirection symbol. */
2553 while (isspace (*s
)) /* skip whitespace before file name */
2555 *d
++ = ' '; /* separate file name with a single space */
2558 /* Copy the file name. */
2561 /* Remove quoting characters from the file name in buf[]. */
2562 if (*s
== '"') /* could support '..' quoting here */
2566 else if (*s
== quote
)
2574 else if (*s
== '\\')
2576 if (s
[1] == '"') /* could support '..' here */
2580 else if (isspace (*s
) && !quote
)
2584 if (d
- buf
>= sizeof (buf
) - 1)
2586 errno
= ENAMETOOLONG
;
2592 /* Windows doesn't allow redirection characters in file names, so we
2593 can bail out early if they use them, or if there's no target file
2594 name after the redirection symbol. */
2595 if (d
[-1] == '>' || d
[-1] == '<')
2600 if (redir_open (buf
, inp
, out
, err
) == 0)
2605 /* Parse the command line for redirection specs and prepare the file
2606 descriptors for the 3 standard streams accordingly. */
2608 redirect_inferior_handles (const char *cmd_orig
, char *cmd
,
2609 int *inp
, int *out
, int *err
)
2611 const char *s
= cmd_orig
;
2614 bool retval
= false;
2616 while (isspace (*s
))
2621 if (*s
== '"') /* could also support '..' quoting here */
2625 else if (*s
== quote
)
2628 else if (*s
== '\\')
2630 if (s
[1] == '"') /* escaped quote char */
2635 /* Process a single redirection candidate. */
2636 if (*s
== '<' || *s
== '>'
2637 || ((*s
== '1' || *s
== '2') && s
[1] == '>')
2638 || (*s
== '0' && s
[1] == '<'))
2640 int skip
= redir_set_redirection (s
, inp
, out
, err
);
2654 #endif /* !__CYGWIN__ */
2656 /* Start an inferior windows child process and sets inferior_ptid to its pid.
2657 EXEC_FILE is the file to run.
2658 ALLARGS is a string containing the arguments to the program.
2659 ENV is the environment vector to pass. Errors reported with error(). */
2662 windows_nat_target::create_inferior (const char *exec_file
,
2663 const std::string
&origallargs
,
2664 char **in_env
, int from_tty
)
2668 cygwin_buf_t real_path
[__PMAX
];
2669 cygwin_buf_t shell
[__PMAX
]; /* Path to shell */
2670 cygwin_buf_t infcwd
[__PMAX
];
2672 cygwin_buf_t
*toexec
;
2673 cygwin_buf_t
*cygallargs
;
2675 char **old_env
= NULL
;
2679 int ostdin
, ostdout
, ostderr
;
2680 #else /* !__CYGWIN__ */
2681 char shell
[__PMAX
]; /* Path to shell */
2683 char *args
, *allargs_copy
;
2684 size_t args_len
, allargs_len
;
2685 int fd_inp
= -1, fd_out
= -1, fd_err
= -1;
2686 HANDLE tty
= INVALID_HANDLE_VALUE
;
2687 bool redirected
= false;
2694 #endif /* !__CYGWIN__ */
2695 const char *allargs
= origallargs
.c_str ();
2696 PROCESS_INFORMATION pi
;
2699 const char *inferior_io_terminal
= get_inferior_io_terminal ();
2702 error (_("No executable specified, use `target exec'."));
2704 const char *inferior_cwd
= get_inferior_cwd ();
2705 std::string expanded_infcwd
;
2706 if (inferior_cwd
!= NULL
)
2708 expanded_infcwd
= gdb_tilde_expand (inferior_cwd
);
2709 /* Mirror slashes on inferior's cwd. */
2710 std::replace (expanded_infcwd
.begin (), expanded_infcwd
.end (),
2712 inferior_cwd
= expanded_infcwd
.c_str ();
2715 memset (&si
, 0, sizeof (si
));
2716 si
.cb
= sizeof (si
);
2719 flags
|= CREATE_NEW_PROCESS_GROUP
;
2722 windows_set_console_info (&si
, &flags
);
2727 flags
|= DEBUG_ONLY_THIS_PROCESS
;
2728 if (cygwin_conv_path (CCP_POSIX_TO_WIN_W
, exec_file
, real_path
,
2729 __PMAX
* sizeof (cygwin_buf_t
)) < 0)
2730 error (_("Error starting executable: %d"), errno
);
2733 len
= mbstowcs (NULL
, allargs
, 0) + 1;
2734 if (len
== (size_t) -1)
2735 error (_("Error starting executable: %d"), errno
);
2736 cygallargs
= (wchar_t *) alloca (len
* sizeof (wchar_t));
2737 mbstowcs (cygallargs
, allargs
, len
);
2738 #else /* !__USEWIDE */
2739 cygallargs
= allargs
;
2745 if (cygwin_conv_path (CCP_POSIX_TO_WIN_W
, sh
, shell
, __PMAX
) < 0)
2746 error (_("Error starting executable via shell: %d"), errno
);
2748 len
= sizeof (L
" -c 'exec '") + mbstowcs (NULL
, exec_file
, 0)
2749 + mbstowcs (NULL
, allargs
, 0) + 2;
2750 cygallargs
= (wchar_t *) alloca (len
* sizeof (wchar_t));
2751 swprintf (cygallargs
, len
, L
" -c 'exec %s %s'", exec_file
, allargs
);
2752 #else /* !__USEWIDE */
2753 len
= (sizeof (" -c 'exec '") + strlen (exec_file
)
2754 + strlen (allargs
) + 2);
2755 cygallargs
= (char *) alloca (len
);
2756 xsnprintf (cygallargs
, len
, " -c 'exec %s %s'", exec_file
, allargs
);
2757 #endif /* __USEWIDE */
2759 flags
|= DEBUG_PROCESS
;
2762 if (inferior_cwd
!= NULL
2763 && cygwin_conv_path (CCP_POSIX_TO_WIN_W
, inferior_cwd
,
2764 infcwd
, strlen (inferior_cwd
)) < 0)
2765 error (_("Error converting inferior cwd: %d"), errno
);
2768 args
= (cygwin_buf_t
*) alloca ((wcslen (toexec
) + wcslen (cygallargs
) + 2)
2769 * sizeof (wchar_t));
2770 wcscpy (args
, toexec
);
2771 wcscat (args
, L
" ");
2772 wcscat (args
, cygallargs
);
2773 #else /* !__USEWIDE */
2774 args
= (cygwin_buf_t
*) alloca (strlen (toexec
) + strlen (cygallargs
) + 2);
2775 strcpy (args
, toexec
);
2777 strcat (args
, cygallargs
);
2778 #endif /* !__USEWIDE */
2780 #ifdef CW_CVT_ENV_TO_WINENV
2781 /* First try to create a direct Win32 copy of the POSIX environment. */
2782 w32_env
= (PWCHAR
) cygwin_internal (CW_CVT_ENV_TO_WINENV
, in_env
);
2783 if (w32_env
!= (PWCHAR
) -1)
2784 flags
|= CREATE_UNICODE_ENVIRONMENT
;
2786 /* If that fails, fall back to old method tweaking GDB's environment. */
2787 #endif /* CW_CVT_ENV_TO_WINENV */
2789 /* Reset all Win32 environment variables to avoid leftover on next run. */
2790 clear_win32_environment (environ
);
2791 /* Prepare the environment vars for CreateProcess. */
2794 cygwin_internal (CW_SYNC_WINENV
);
2798 if (!inferior_io_terminal
)
2799 tty
= ostdin
= ostdout
= ostderr
= -1;
2802 tty
= open (inferior_io_terminal
, O_RDWR
| O_NOCTTY
);
2805 print_sys_errmsg (inferior_io_terminal
, errno
);
2806 ostdin
= ostdout
= ostderr
= -1;
2819 windows_init_thread_list ();
2820 ret
= CreateProcess (0,
2821 args
, /* command line */
2822 NULL
, /* Security */
2824 TRUE
, /* inherit handles */
2825 flags
, /* start flags */
2826 w32_env
, /* environment */
2827 inferior_cwd
!= NULL
? infcwd
: NULL
, /* current
2832 /* Just free the Win32 environment, if it could be created. */
2836 /* Reset all environment variables to avoid leftover on next run. */
2837 clear_win32_environment (in_env
);
2838 /* Restore normal GDB environment variables. */
2840 cygwin_internal (CW_SYNC_WINENV
);
2853 #else /* !__CYGWIN__ */
2854 allargs_len
= strlen (allargs
);
2855 allargs_copy
= strcpy ((char *) alloca (allargs_len
+ 1), allargs
);
2856 if (strpbrk (allargs_copy
, "<>") != NULL
)
2861 redirect_inferior_handles (allargs
, allargs_copy
,
2862 &fd_inp
, &fd_out
, &fd_err
);
2864 warning (_("Error in redirection: %s."), safe_strerror (errno
));
2867 allargs_len
= strlen (allargs_copy
);
2869 /* If not all the standard streams are redirected by the command
2870 line, use inferior_io_terminal for those which aren't. */
2871 if (inferior_io_terminal
2872 && !(fd_inp
>= 0 && fd_out
>= 0 && fd_err
>= 0))
2874 SECURITY_ATTRIBUTES sa
;
2875 sa
.nLength
= sizeof(sa
);
2876 sa
.lpSecurityDescriptor
= 0;
2877 sa
.bInheritHandle
= TRUE
;
2878 tty
= CreateFileA (inferior_io_terminal
, GENERIC_READ
| GENERIC_WRITE
,
2879 0, &sa
, OPEN_EXISTING
, FILE_ATTRIBUTE_NORMAL
, 0);
2880 if (tty
== INVALID_HANDLE_VALUE
)
2881 warning (_("Warning: Failed to open TTY %s, error %#x."),
2882 inferior_io_terminal
, (unsigned) GetLastError ());
2884 if (redirected
|| tty
!= INVALID_HANDLE_VALUE
)
2887 si
.hStdInput
= (HANDLE
) _get_osfhandle (fd_inp
);
2888 else if (tty
!= INVALID_HANDLE_VALUE
)
2891 si
.hStdInput
= GetStdHandle (STD_INPUT_HANDLE
);
2893 si
.hStdOutput
= (HANDLE
) _get_osfhandle (fd_out
);
2894 else if (tty
!= INVALID_HANDLE_VALUE
)
2895 si
.hStdOutput
= tty
;
2897 si
.hStdOutput
= GetStdHandle (STD_OUTPUT_HANDLE
);
2899 si
.hStdError
= (HANDLE
) _get_osfhandle (fd_err
);
2900 else if (tty
!= INVALID_HANDLE_VALUE
)
2903 si
.hStdError
= GetStdHandle (STD_ERROR_HANDLE
);
2904 si
.dwFlags
|= STARTF_USESTDHANDLES
;
2908 /* Build the command line, a space-separated list of tokens where
2909 the first token is the name of the module to be executed.
2910 To avoid ambiguities introduced by spaces in the module name,
2912 args_len
= strlen (toexec
) + 2 /* quotes */ + allargs_len
+ 2;
2913 args
= (char *) alloca (args_len
);
2914 xsnprintf (args
, args_len
, "\"%s\" %s", toexec
, allargs_copy
);
2916 flags
|= DEBUG_ONLY_THIS_PROCESS
;
2918 /* CreateProcess takes the environment list as a null terminated set of
2919 strings (i.e. two nulls terminate the list). */
2921 /* Get total size for env strings. */
2922 for (envlen
= 0, i
= 0; in_env
[i
] && *in_env
[i
]; i
++)
2923 envlen
+= strlen (in_env
[i
]) + 1;
2925 envsize
= sizeof (in_env
[0]) * (i
+ 1);
2926 env
= (char **) alloca (envsize
);
2927 memcpy (env
, in_env
, envsize
);
2928 /* Windows programs expect the environment block to be sorted. */
2929 qsort (env
, i
, sizeof (char *), envvar_cmp
);
2931 w32env
= (char *) alloca (envlen
+ 1);
2933 /* Copy env strings into new buffer. */
2934 for (temp
= w32env
, i
= 0; env
[i
] && *env
[i
]; i
++)
2936 strcpy (temp
, env
[i
]);
2937 temp
+= strlen (temp
) + 1;
2940 /* Final nil string to terminate new env. */
2943 windows_init_thread_list ();
2944 ret
= CreateProcessA (0,
2945 args
, /* command line */
2946 NULL
, /* Security */
2948 TRUE
, /* inherit handles */
2949 flags
, /* start flags */
2950 w32env
, /* environment */
2951 inferior_cwd
, /* current directory */
2954 if (tty
!= INVALID_HANDLE_VALUE
)
2962 #endif /* !__CYGWIN__ */
2965 error (_("Error creating process %s, (error %u)."),
2966 exec_file
, (unsigned) GetLastError ());
2970 if (IsWow64Process (pi
.hProcess
, &wow64
))
2971 wow64_process
= wow64
;
2974 CloseHandle (pi
.hThread
);
2975 CloseHandle (pi
.hProcess
);
2977 if (useshell
&& shell
[0] != '\0')
2982 do_initial_windows_stuff (this, pi
.dwProcessId
, 0);
2984 /* windows_continue (DBG_CONTINUE, -1, 0); */
2988 windows_nat_target::mourn_inferior ()
2990 (void) windows_continue (DBG_CONTINUE
, -1, 0);
2991 x86_cleanup_dregs();
2992 if (open_process_used
)
2994 CHECK (CloseHandle (current_process_handle
));
2995 open_process_used
= 0;
2997 siginfo_er
.ExceptionCode
= 0;
2998 inf_child_target::mourn_inferior ();
3001 /* Send a SIGINT to the process group. This acts just like the user typed a
3002 ^C on the controlling terminal. */
3005 windows_nat_target::interrupt ()
3007 DEBUG_EVENTS (("gdb: GenerateConsoleCtrlEvent (CTRLC_EVENT, 0)\n"));
3008 CHECK (GenerateConsoleCtrlEvent (CTRL_C_EVENT
, current_event
.dwProcessId
));
3009 registers_changed (); /* refresh register state */
3012 /* Helper for windows_xfer_partial that handles memory transfers.
3013 Arguments are like target_xfer_partial. */
3015 static enum target_xfer_status
3016 windows_xfer_memory (gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
3017 ULONGEST memaddr
, ULONGEST len
, ULONGEST
*xfered_len
)
3021 DWORD lasterror
= 0;
3023 if (writebuf
!= NULL
)
3025 DEBUG_MEM (("gdb: write target memory, %s bytes at %s\n",
3026 pulongest (len
), core_addr_to_string (memaddr
)));
3027 success
= WriteProcessMemory (current_process_handle
,
3028 (LPVOID
) (uintptr_t) memaddr
, writebuf
,
3031 lasterror
= GetLastError ();
3032 FlushInstructionCache (current_process_handle
,
3033 (LPCVOID
) (uintptr_t) memaddr
, len
);
3037 DEBUG_MEM (("gdb: read target memory, %s bytes at %s\n",
3038 pulongest (len
), core_addr_to_string (memaddr
)));
3039 success
= ReadProcessMemory (current_process_handle
,
3040 (LPCVOID
) (uintptr_t) memaddr
, readbuf
,
3043 lasterror
= GetLastError ();
3045 *xfered_len
= (ULONGEST
) done
;
3046 if (!success
&& lasterror
== ERROR_PARTIAL_COPY
&& done
> 0)
3047 return TARGET_XFER_OK
;
3049 return success
? TARGET_XFER_OK
: TARGET_XFER_E_IO
;
3053 windows_nat_target::kill ()
3055 CHECK (TerminateProcess (current_process_handle
, 0));
3059 if (!windows_continue (DBG_CONTINUE
, -1, 1))
3061 if (!wait_for_debug_event (¤t_event
, INFINITE
))
3063 if (current_event
.dwDebugEventCode
== EXIT_PROCESS_DEBUG_EVENT
)
3067 target_mourn_inferior (inferior_ptid
); /* Or just windows_mourn_inferior? */
3071 windows_nat_target::close ()
3073 DEBUG_EVENTS (("gdb: windows_close, inferior_ptid=%d\n",
3074 inferior_ptid
.pid ()));
3077 /* Convert pid to printable format. */
3079 windows_nat_target::pid_to_str (ptid_t ptid
)
3081 if (ptid
.lwp () != 0)
3082 return string_printf ("Thread %d.0x%lx", ptid
.pid (), ptid
.lwp ());
3084 return normal_pid_to_str (ptid
);
3087 static enum target_xfer_status
3088 windows_xfer_shared_libraries (struct target_ops
*ops
,
3089 enum target_object object
, const char *annex
,
3090 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
3091 ULONGEST offset
, ULONGEST len
,
3092 ULONGEST
*xfered_len
)
3094 struct obstack obstack
;
3100 return TARGET_XFER_E_IO
;
3102 obstack_init (&obstack
);
3103 obstack_grow_str (&obstack
, "<library-list>\n");
3104 for (so
= solib_start
.next
; so
; so
= so
->next
)
3106 lm_info_windows
*li
= (lm_info_windows
*) so
->lm_info
;
3108 windows_xfer_shared_library (so
->so_name
, (CORE_ADDR
)
3109 (uintptr_t) li
->load_addr
,
3111 target_gdbarch (), &obstack
);
3113 obstack_grow_str0 (&obstack
, "</library-list>\n");
3115 buf
= (const char *) obstack_finish (&obstack
);
3116 len_avail
= strlen (buf
);
3117 if (offset
>= len_avail
)
3121 if (len
> len_avail
- offset
)
3122 len
= len_avail
- offset
;
3123 memcpy (readbuf
, buf
+ offset
, len
);
3126 obstack_free (&obstack
, NULL
);
3127 *xfered_len
= (ULONGEST
) len
;
3128 return len
!= 0 ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
3131 /* Helper for windows_nat_target::xfer_partial that handles signal info. */
3133 static enum target_xfer_status
3134 windows_xfer_siginfo (gdb_byte
*readbuf
, ULONGEST offset
, ULONGEST len
,
3135 ULONGEST
*xfered_len
)
3137 char *buf
= (char *) &siginfo_er
;
3138 size_t bufsize
= sizeof (siginfo_er
);
3141 EXCEPTION_RECORD32 er32
;
3144 buf
= (char *) &er32
;
3145 bufsize
= sizeof (er32
);
3147 er32
.ExceptionCode
= siginfo_er
.ExceptionCode
;
3148 er32
.ExceptionFlags
= siginfo_er
.ExceptionFlags
;
3149 er32
.ExceptionRecord
= (uintptr_t) siginfo_er
.ExceptionRecord
;
3150 er32
.ExceptionAddress
= (uintptr_t) siginfo_er
.ExceptionAddress
;
3151 er32
.NumberParameters
= siginfo_er
.NumberParameters
;
3153 for (i
= 0; i
< EXCEPTION_MAXIMUM_PARAMETERS
; i
++)
3154 er32
.ExceptionInformation
[i
] = siginfo_er
.ExceptionInformation
[i
];
3158 if (siginfo_er
.ExceptionCode
== 0)
3159 return TARGET_XFER_E_IO
;
3161 if (readbuf
== nullptr)
3162 return TARGET_XFER_E_IO
;
3164 if (offset
> bufsize
)
3165 return TARGET_XFER_E_IO
;
3167 if (offset
+ len
> bufsize
)
3168 len
= bufsize
- offset
;
3170 memcpy (readbuf
, buf
+ offset
, len
);
3173 return TARGET_XFER_OK
;
3176 enum target_xfer_status
3177 windows_nat_target::xfer_partial (enum target_object object
,
3178 const char *annex
, gdb_byte
*readbuf
,
3179 const gdb_byte
*writebuf
, ULONGEST offset
,
3180 ULONGEST len
, ULONGEST
*xfered_len
)
3184 case TARGET_OBJECT_MEMORY
:
3185 return windows_xfer_memory (readbuf
, writebuf
, offset
, len
, xfered_len
);
3187 case TARGET_OBJECT_LIBRARIES
:
3188 return windows_xfer_shared_libraries (this, object
, annex
, readbuf
,
3189 writebuf
, offset
, len
, xfered_len
);
3191 case TARGET_OBJECT_SIGNAL_INFO
:
3192 return windows_xfer_siginfo (readbuf
, offset
, len
, xfered_len
);
3195 if (beneath () == NULL
)
3197 /* This can happen when requesting the transfer of unsupported
3198 objects before a program has been started (and therefore
3199 with the current_target having no target beneath). */
3200 return TARGET_XFER_E_IO
;
3202 return beneath ()->xfer_partial (object
, annex
,
3203 readbuf
, writebuf
, offset
, len
,
3208 /* Provide thread local base, i.e. Thread Information Block address.
3209 Returns 1 if ptid is found and sets *ADDR to thread_local_base. */
3212 windows_nat_target::get_tib_address (ptid_t ptid
, CORE_ADDR
*addr
)
3214 windows_thread_info
*th
;
3216 th
= thread_rec (ptid
, DONT_INVALIDATE_CONTEXT
);
3221 *addr
= th
->thread_local_base
;
3227 windows_nat_target::get_ada_task_ptid (long lwp
, long thread
)
3229 return ptid_t (inferior_ptid
.pid (), lwp
, 0);
3232 /* Implementation of the to_thread_name method. */
3235 windows_nat_target::thread_name (struct thread_info
*thr
)
3237 return thread_rec (thr
->ptid
, DONT_INVALIDATE_CONTEXT
)->name
.get ();
3241 void _initialize_windows_nat ();
3243 _initialize_windows_nat ()
3245 x86_dr_low
.set_control
= cygwin_set_dr7
;
3246 x86_dr_low
.set_addr
= cygwin_set_dr
;
3247 x86_dr_low
.get_addr
= cygwin_get_dr
;
3248 x86_dr_low
.get_status
= cygwin_get_dr6
;
3249 x86_dr_low
.get_control
= cygwin_get_dr7
;
3251 /* x86_dr_low.debug_register_length field is set by
3252 calling x86_set_debug_register_length function
3253 in processor windows specific native file. */
3255 add_inf_child_target (&the_windows_nat_target
);
3258 cygwin_internal (CW_SET_DOS_FILE_WARNING
, 0);
3261 add_com ("signal-event", class_run
, signal_event_command
, _("\
3262 Signal a crashed process with event ID, to allow its debugging.\n\
3263 This command is needed in support of setting up GDB as JIT debugger on \
3264 MS-Windows. The command should be invoked from the GDB command line using \
3265 the '-ex' command-line option. The ID of the event that blocks the \
3266 crashed process will be supplied by the Windows JIT debugging mechanism."));
3269 add_setshow_boolean_cmd ("shell", class_support
, &useshell
, _("\
3270 Set use of shell to start subprocess."), _("\
3271 Show use of shell to start subprocess."), NULL
,
3273 NULL
, /* FIXME: i18n: */
3274 &setlist
, &showlist
);
3276 add_setshow_boolean_cmd ("cygwin-exceptions", class_support
,
3277 &cygwin_exceptions
, _("\
3278 Break when an exception is detected in the Cygwin DLL itself."), _("\
3279 Show whether gdb breaks on exceptions in the Cygwin DLL itself."), NULL
,
3281 NULL
, /* FIXME: i18n: */
3282 &setlist
, &showlist
);
3285 add_setshow_boolean_cmd ("new-console", class_support
, &new_console
, _("\
3286 Set creation of new console when creating child process."), _("\
3287 Show creation of new console when creating child process."), NULL
,
3289 NULL
, /* FIXME: i18n: */
3290 &setlist
, &showlist
);
3292 add_setshow_boolean_cmd ("new-group", class_support
, &new_group
, _("\
3293 Set creation of new group when creating child process."), _("\
3294 Show creation of new group when creating child process."), NULL
,
3296 NULL
, /* FIXME: i18n: */
3297 &setlist
, &showlist
);
3299 add_setshow_boolean_cmd ("debugexec", class_support
, &debug_exec
, _("\
3300 Set whether to display execution in child process."), _("\
3301 Show whether to display execution in child process."), NULL
,
3303 NULL
, /* FIXME: i18n: */
3304 &setlist
, &showlist
);
3306 add_setshow_boolean_cmd ("debugevents", class_support
, &debug_events
, _("\
3307 Set whether to display kernel events in child process."), _("\
3308 Show whether to display kernel events in child process."), NULL
,
3310 NULL
, /* FIXME: i18n: */
3311 &setlist
, &showlist
);
3313 add_setshow_boolean_cmd ("debugmemory", class_support
, &debug_memory
, _("\
3314 Set whether to display memory accesses in child process."), _("\
3315 Show whether to display memory accesses in child process."), NULL
,
3317 NULL
, /* FIXME: i18n: */
3318 &setlist
, &showlist
);
3320 add_setshow_boolean_cmd ("debugexceptions", class_support
,
3321 &debug_exceptions
, _("\
3322 Set whether to display kernel exceptions in child process."), _("\
3323 Show whether to display kernel exceptions in child process."), NULL
,
3325 NULL
, /* FIXME: i18n: */
3326 &setlist
, &showlist
);
3328 init_w32_command_list ();
3330 add_cmd ("selector", class_info
, display_selectors
,
3331 _("Display selectors infos."),
3335 /* Hardware watchpoint support, adapted from go32-nat.c code. */
3337 /* Pass the address ADDR to the inferior in the I'th debug register.
3338 Here we just store the address in dr array, the registers will be
3339 actually set up when windows_continue is called. */
3341 cygwin_set_dr (int i
, CORE_ADDR addr
)
3344 internal_error (__FILE__
, __LINE__
,
3345 _("Invalid register %d in cygwin_set_dr.\n"), i
);
3347 debug_registers_changed
= 1;
3348 debug_registers_used
= 1;
3351 /* Pass the value VAL to the inferior in the DR7 debug control
3352 register. Here we just store the address in D_REGS, the watchpoint
3353 will be actually set up in windows_wait. */
3355 cygwin_set_dr7 (unsigned long val
)
3357 dr
[7] = (CORE_ADDR
) val
;
3358 debug_registers_changed
= 1;
3359 debug_registers_used
= 1;
3362 /* Get the value of debug register I from the inferior. */
3365 cygwin_get_dr (int i
)
3370 /* Get the value of the DR6 debug status register from the inferior.
3371 Here we just return the value stored in dr[6]
3372 by the last call to thread_rec for current_event.dwThreadId id. */
3373 static unsigned long
3374 cygwin_get_dr6 (void)
3376 return (unsigned long) dr
[6];
3379 /* Get the value of the DR7 debug status register from the inferior.
3380 Here we just return the value stored in dr[7] by the last call to
3381 thread_rec for current_event.dwThreadId id. */
3383 static unsigned long
3384 cygwin_get_dr7 (void)
3386 return (unsigned long) dr
[7];
3389 /* Determine if the thread referenced by "ptid" is alive
3390 by "polling" it. If WaitForSingleObject returns WAIT_OBJECT_0
3391 it means that the thread has died. Otherwise it is assumed to be alive. */
3394 windows_nat_target::thread_alive (ptid_t ptid
)
3396 gdb_assert (ptid
.lwp () != 0);
3398 return (WaitForSingleObject (thread_rec (ptid
, DONT_INVALIDATE_CONTEXT
)->h
, 0)
3402 void _initialize_check_for_gdb_ini ();
3404 _initialize_check_for_gdb_ini ()
3407 if (inhibit_gdbinit
)
3410 homedir
= getenv ("HOME");
3414 char *oldini
= (char *) alloca (strlen (homedir
) +
3415 sizeof ("gdb.ini") + 1);
3416 strcpy (oldini
, homedir
);
3417 p
= strchr (oldini
, '\0');
3418 if (p
> oldini
&& !IS_DIR_SEPARATOR (p
[-1]))
3420 strcpy (p
, "gdb.ini");
3421 if (access (oldini
, 0) == 0)
3423 int len
= strlen (oldini
);
3424 char *newini
= (char *) alloca (len
+ 2);
3426 xsnprintf (newini
, len
+ 2, "%.*s.gdbinit",
3427 (int) (len
- (sizeof ("gdb.ini") - 1)), oldini
);
3428 warning (_("obsolete '%s' found. Rename to '%s'."), oldini
, newini
);
3433 /* Define dummy functions which always return error for the rare cases where
3434 these functions could not be found. */
3436 bad_DebugActiveProcessStop (DWORD w
)
3441 bad_DebugBreakProcess (HANDLE w
)
3446 bad_DebugSetProcessKillOnExit (BOOL w
)
3451 bad_EnumProcessModules (HANDLE w
, HMODULE
*x
, DWORD y
, LPDWORD z
)
3458 bad_GetModuleFileNameExW (HANDLE w
, HMODULE x
, LPWSTR y
, DWORD z
)
3464 bad_GetModuleFileNameExA (HANDLE w
, HMODULE x
, LPSTR y
, DWORD z
)
3471 bad_GetModuleInformation (HANDLE w
, HMODULE x
, LPMODULEINFO y
, DWORD z
)
3477 bad_OpenProcessToken (HANDLE w
, DWORD x
, PHANDLE y
)
3483 bad_GetCurrentConsoleFont (HANDLE w
, BOOL bMaxWindow
, CONSOLE_FONT_INFO
*f
)
3489 bad_GetConsoleFontSize (HANDLE w
, DWORD nFont
)
3497 /* Load any functions which may not be available in ancient versions
3500 void _initialize_loadable ();
3502 _initialize_loadable ()
3506 #define GPA(m, func) \
3507 func = (func ## _ftype *) GetProcAddress (m, #func)
3509 hm
= LoadLibrary ("kernel32.dll");
3512 GPA (hm
, DebugActiveProcessStop
);
3513 GPA (hm
, DebugBreakProcess
);
3514 GPA (hm
, DebugSetProcessKillOnExit
);
3515 GPA (hm
, GetConsoleFontSize
);
3516 GPA (hm
, DebugActiveProcessStop
);
3517 GPA (hm
, GetCurrentConsoleFont
);
3519 GPA (hm
, Wow64SuspendThread
);
3520 GPA (hm
, Wow64GetThreadContext
);
3521 GPA (hm
, Wow64SetThreadContext
);
3522 GPA (hm
, Wow64GetThreadSelectorEntry
);
3526 /* Set variables to dummy versions of these processes if the function
3527 wasn't found in kernel32.dll. */
3528 if (!DebugBreakProcess
)
3529 DebugBreakProcess
= bad_DebugBreakProcess
;
3530 if (!DebugActiveProcessStop
|| !DebugSetProcessKillOnExit
)
3532 DebugActiveProcessStop
= bad_DebugActiveProcessStop
;
3533 DebugSetProcessKillOnExit
= bad_DebugSetProcessKillOnExit
;
3535 if (!GetConsoleFontSize
)
3536 GetConsoleFontSize
= bad_GetConsoleFontSize
;
3537 if (!GetCurrentConsoleFont
)
3538 GetCurrentConsoleFont
= bad_GetCurrentConsoleFont
;
3540 /* Load optional functions used for retrieving filename information
3541 associated with the currently debugged process or its dlls. */
3542 hm
= LoadLibrary ("psapi.dll");
3545 GPA (hm
, EnumProcessModules
);
3547 GPA (hm
, EnumProcessModulesEx
);
3549 GPA (hm
, GetModuleInformation
);
3550 GetModuleFileNameEx
= (GetModuleFileNameEx_ftype
*)
3551 GetProcAddress (hm
, GetModuleFileNameEx_name
);
3554 if (!EnumProcessModules
|| !GetModuleInformation
|| !GetModuleFileNameEx
)
3556 /* Set variables to dummy versions of these processes if the function
3557 wasn't found in psapi.dll. */
3558 EnumProcessModules
= bad_EnumProcessModules
;
3559 GetModuleInformation
= bad_GetModuleInformation
;
3560 GetModuleFileNameEx
= bad_GetModuleFileNameEx
;
3561 /* This will probably fail on Windows 9x/Me. Let the user know
3562 that we're missing some functionality. */
3564 cannot automatically find executable file or library to read symbols.\n\
3565 Use \"file\" or \"dll\" command to load executable/libraries directly."));
3568 hm
= LoadLibrary ("advapi32.dll");
3571 GPA (hm
, OpenProcessToken
);
3572 GPA (hm
, LookupPrivilegeValueA
);
3573 GPA (hm
, AdjustTokenPrivileges
);
3574 /* Only need to set one of these since if OpenProcessToken fails nothing
3576 if (!OpenProcessToken
|| !LookupPrivilegeValueA
3577 || !AdjustTokenPrivileges
)
3578 OpenProcessToken
= bad_OpenProcessToken
;