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 /* A wrapper for WaitForDebugEvent that sets "last_wait_event"
1501 wait_for_debug_event (DEBUG_EVENT
*event
, DWORD timeout
)
1503 BOOL result
= WaitForDebugEvent (event
, timeout
);
1505 last_wait_event
= *event
;
1509 /* Get the next event from the child. Returns a non-zero thread id if the event
1510 requires handling by WFI (or whatever). */
1513 windows_nat_target::get_windows_debug_event (int pid
,
1514 struct target_waitstatus
*ourstatus
)
1517 DWORD continue_status
, event_code
;
1518 windows_thread_info
*th
;
1519 static windows_thread_info
dummy_thread_info (0, 0, 0);
1520 DWORD thread_id
= 0;
1522 /* If there is a relevant pending stop, report it now. See the
1523 comment by the definition of "pending_stops" for details on why
1525 gdb::optional
<pending_stop
> stop
= fetch_pending_stop (debug_events
);
1526 if (stop
.has_value ())
1528 thread_id
= stop
->thread_id
;
1529 *ourstatus
= stop
->status
;
1531 inferior_ptid
= ptid_t (current_event
.dwProcessId
, thread_id
, 0);
1532 current_windows_thread
= thread_rec (inferior_ptid
,
1533 INVALIDATE_CONTEXT
);
1534 current_windows_thread
->reload_context
= 1;
1539 last_sig
= GDB_SIGNAL_0
;
1541 if (!(debug_event
= wait_for_debug_event (¤t_event
, 1000)))
1544 continue_status
= DBG_CONTINUE
;
1546 event_code
= current_event
.dwDebugEventCode
;
1547 ourstatus
->kind
= TARGET_WAITKIND_SPURIOUS
;
1549 have_saved_context
= 0;
1553 case CREATE_THREAD_DEBUG_EVENT
:
1554 DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=0x%x code=%s)\n",
1555 (unsigned) current_event
.dwProcessId
,
1556 (unsigned) current_event
.dwThreadId
,
1557 "CREATE_THREAD_DEBUG_EVENT"));
1558 if (saw_create
!= 1)
1560 inferior
*inf
= find_inferior_pid (this, current_event
.dwProcessId
);
1561 if (!saw_create
&& inf
->attach_flag
)
1563 /* Kludge around a Windows bug where first event is a create
1564 thread event. Caused when attached process does not have
1566 thread_id
= fake_create_process ();
1572 /* Record the existence of this thread. */
1573 thread_id
= current_event
.dwThreadId
;
1574 th
= windows_add_thread
1575 (ptid_t (current_event
.dwProcessId
, current_event
.dwThreadId
, 0),
1576 current_event
.u
.CreateThread
.hThread
,
1577 current_event
.u
.CreateThread
.lpThreadLocalBase
,
1578 false /* main_thread_p */);
1582 case EXIT_THREAD_DEBUG_EVENT
:
1583 DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=0x%x code=%s)\n",
1584 (unsigned) current_event
.dwProcessId
,
1585 (unsigned) current_event
.dwThreadId
,
1586 "EXIT_THREAD_DEBUG_EVENT"));
1587 windows_delete_thread (ptid_t (current_event
.dwProcessId
,
1588 current_event
.dwThreadId
, 0),
1589 current_event
.u
.ExitThread
.dwExitCode
,
1590 false /* main_thread_p */);
1591 th
= &dummy_thread_info
;
1594 case CREATE_PROCESS_DEBUG_EVENT
:
1595 DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=0x%x code=%s)\n",
1596 (unsigned) current_event
.dwProcessId
,
1597 (unsigned) current_event
.dwThreadId
,
1598 "CREATE_PROCESS_DEBUG_EVENT"));
1599 CloseHandle (current_event
.u
.CreateProcessInfo
.hFile
);
1600 if (++saw_create
!= 1)
1603 current_process_handle
= current_event
.u
.CreateProcessInfo
.hProcess
;
1604 /* Add the main thread. */
1605 th
= windows_add_thread
1606 (ptid_t (current_event
.dwProcessId
,
1607 current_event
.dwThreadId
, 0),
1608 current_event
.u
.CreateProcessInfo
.hThread
,
1609 current_event
.u
.CreateProcessInfo
.lpThreadLocalBase
,
1610 true /* main_thread_p */);
1611 thread_id
= current_event
.dwThreadId
;
1614 case EXIT_PROCESS_DEBUG_EVENT
:
1615 DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=0x%x code=%s)\n",
1616 (unsigned) current_event
.dwProcessId
,
1617 (unsigned) current_event
.dwThreadId
,
1618 "EXIT_PROCESS_DEBUG_EVENT"));
1619 if (!windows_initialization_done
)
1621 target_terminal::ours ();
1622 target_mourn_inferior (inferior_ptid
);
1623 error (_("During startup program exited with code 0x%x."),
1624 (unsigned int) current_event
.u
.ExitProcess
.dwExitCode
);
1626 else if (saw_create
== 1)
1628 windows_delete_thread (ptid_t (current_event
.dwProcessId
,
1629 current_event
.dwThreadId
, 0),
1630 0, true /* main_thread_p */);
1631 DWORD exit_status
= current_event
.u
.ExitProcess
.dwExitCode
;
1632 /* If the exit status looks like a fatal exception, but we
1633 don't recognize the exception's code, make the original
1634 exit status value available, to avoid losing
1637 = WIFSIGNALED (exit_status
) ? WTERMSIG (exit_status
) : -1;
1638 if (exit_signal
== -1)
1640 ourstatus
->kind
= TARGET_WAITKIND_EXITED
;
1641 ourstatus
->value
.integer
= exit_status
;
1645 ourstatus
->kind
= TARGET_WAITKIND_SIGNALLED
;
1646 ourstatus
->value
.sig
= gdb_signal_from_host (exit_signal
);
1648 thread_id
= current_event
.dwThreadId
;
1652 case LOAD_DLL_DEBUG_EVENT
:
1653 DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=0x%x code=%s)\n",
1654 (unsigned) current_event
.dwProcessId
,
1655 (unsigned) current_event
.dwThreadId
,
1656 "LOAD_DLL_DEBUG_EVENT"));
1657 CloseHandle (current_event
.u
.LoadDll
.hFile
);
1658 if (saw_create
!= 1 || ! windows_initialization_done
)
1660 catch_errors (handle_load_dll
);
1661 ourstatus
->kind
= TARGET_WAITKIND_LOADED
;
1662 ourstatus
->value
.integer
= 0;
1663 thread_id
= current_event
.dwThreadId
;
1666 case UNLOAD_DLL_DEBUG_EVENT
:
1667 DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=0x%x code=%s)\n",
1668 (unsigned) current_event
.dwProcessId
,
1669 (unsigned) current_event
.dwThreadId
,
1670 "UNLOAD_DLL_DEBUG_EVENT"));
1671 if (saw_create
!= 1 || ! windows_initialization_done
)
1673 catch_errors (handle_unload_dll
);
1674 ourstatus
->kind
= TARGET_WAITKIND_LOADED
;
1675 ourstatus
->value
.integer
= 0;
1676 thread_id
= current_event
.dwThreadId
;
1679 case EXCEPTION_DEBUG_EVENT
:
1680 DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=0x%x code=%s)\n",
1681 (unsigned) current_event
.dwProcessId
,
1682 (unsigned) current_event
.dwThreadId
,
1683 "EXCEPTION_DEBUG_EVENT"));
1684 if (saw_create
!= 1)
1686 switch (handle_exception (ourstatus
, debug_exceptions
))
1688 case HANDLE_EXCEPTION_UNHANDLED
:
1690 continue_status
= DBG_EXCEPTION_NOT_HANDLED
;
1692 case HANDLE_EXCEPTION_HANDLED
:
1693 thread_id
= current_event
.dwThreadId
;
1695 case HANDLE_EXCEPTION_IGNORED
:
1696 continue_status
= DBG_CONTINUE
;
1701 case OUTPUT_DEBUG_STRING_EVENT
: /* Message from the kernel. */
1702 DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=0x%x code=%s)\n",
1703 (unsigned) current_event
.dwProcessId
,
1704 (unsigned) current_event
.dwThreadId
,
1705 "OUTPUT_DEBUG_STRING_EVENT"));
1706 if (saw_create
!= 1)
1708 thread_id
= handle_output_debug_string (ourstatus
);
1712 if (saw_create
!= 1)
1714 printf_unfiltered ("gdb: kernel event for pid=%u tid=0x%x\n",
1715 (unsigned) current_event
.dwProcessId
,
1716 (unsigned) current_event
.dwThreadId
);
1717 printf_unfiltered (" unknown event code %u\n",
1718 (unsigned) current_event
.dwDebugEventCode
);
1722 if (!thread_id
|| saw_create
!= 1)
1724 CHECK (windows_continue (continue_status
, desired_stop_thread_id
, 0));
1726 else if (desired_stop_thread_id
!= -1 && desired_stop_thread_id
!= thread_id
)
1728 /* Pending stop. See the comment by the definition of
1729 "pending_stops" for details on why this is needed. */
1730 DEBUG_EVENTS (("get_windows_debug_event - "
1731 "unexpected stop in 0x%x (expecting 0x%x)\n",
1732 thread_id
, desired_stop_thread_id
));
1734 if (current_event
.dwDebugEventCode
== EXCEPTION_DEBUG_EVENT
1735 && (current_event
.u
.Exception
.ExceptionRecord
.ExceptionCode
1736 == EXCEPTION_BREAKPOINT
)
1737 && windows_initialization_done
)
1739 ptid_t ptid
= ptid_t (current_event
.dwProcessId
, thread_id
, 0);
1740 th
= thread_rec (ptid
, INVALIDATE_CONTEXT
);
1741 th
->stopped_at_software_breakpoint
= true;
1743 pending_stops
.push_back ({thread_id
, *ourstatus
, current_event
});
1745 CHECK (windows_continue (continue_status
, desired_stop_thread_id
, 0));
1749 inferior_ptid
= ptid_t (current_event
.dwProcessId
, thread_id
, 0);
1750 current_windows_thread
= th
;
1751 if (!current_windows_thread
)
1752 current_windows_thread
= thread_rec (inferior_ptid
,
1753 INVALIDATE_CONTEXT
);
1760 /* Wait for interesting events to occur in the target process. */
1762 windows_nat_target::wait (ptid_t ptid
, struct target_waitstatus
*ourstatus
,
1767 /* We loop when we get a non-standard exception rather than return
1768 with a SPURIOUS because resume can try and step or modify things,
1769 which needs a current_thread->h. But some of these exceptions mark
1770 the birth or death of threads, which mean that the current thread
1771 isn't necessarily what you think it is. */
1777 /* If the user presses Ctrl-c while the debugger is waiting
1778 for an event, he expects the debugger to interrupt his program
1779 and to get the prompt back. There are two possible situations:
1781 - The debugger and the program do not share the console, in
1782 which case the Ctrl-c event only reached the debugger.
1783 In that case, the ctrl_c handler will take care of interrupting
1784 the inferior. Note that this case is working starting with
1785 Windows XP. For Windows 2000, Ctrl-C should be pressed in the
1788 - The debugger and the program share the same console, in which
1789 case both debugger and inferior will receive the Ctrl-c event.
1790 In that case the ctrl_c handler will ignore the event, as the
1791 Ctrl-c event generated inside the inferior will trigger the
1792 expected debug event.
1794 FIXME: brobecker/2008-05-20: If the inferior receives the
1795 signal first and the delay until GDB receives that signal
1796 is sufficiently long, GDB can sometimes receive the SIGINT
1797 after we have unblocked the CTRL+C handler. This would
1798 lead to the debugger stopping prematurely while handling
1799 the new-thread event that comes with the handling of the SIGINT
1800 inside the inferior, and then stop again immediately when
1801 the user tries to resume the execution in the inferior.
1802 This is a classic race that we should try to fix one day. */
1803 SetConsoleCtrlHandler (&ctrl_c_handler
, TRUE
);
1804 retval
= get_windows_debug_event (pid
, ourstatus
);
1805 SetConsoleCtrlHandler (&ctrl_c_handler
, FALSE
);
1809 ptid_t result
= ptid_t (current_event
.dwProcessId
, retval
, 0);
1811 if (current_windows_thread
!= nullptr)
1813 current_windows_thread
->stopped_at_software_breakpoint
= false;
1814 if (current_event
.dwDebugEventCode
== EXCEPTION_DEBUG_EVENT
1815 && (current_event
.u
.Exception
.ExceptionRecord
.ExceptionCode
1816 == EXCEPTION_BREAKPOINT
)
1817 && windows_initialization_done
)
1818 current_windows_thread
->stopped_at_software_breakpoint
= true;
1827 if (deprecated_ui_loop_hook
!= NULL
)
1828 detach
= deprecated_ui_loop_hook (0);
1836 /* Iterate over all DLLs currently mapped by our inferior, and
1837 add them to our list of solibs. */
1840 windows_add_all_dlls (void)
1842 HMODULE dummy_hmodule
;
1850 if (EnumProcessModulesEx (current_process_handle
, &dummy_hmodule
,
1851 sizeof (HMODULE
), &cb_needed
,
1852 LIST_MODULES_32BIT
) == 0)
1858 if (EnumProcessModules (current_process_handle
, &dummy_hmodule
,
1859 sizeof (HMODULE
), &cb_needed
) == 0)
1866 hmodules
= (HMODULE
*) alloca (cb_needed
);
1870 if (EnumProcessModulesEx (current_process_handle
, hmodules
,
1871 cb_needed
, &cb_needed
,
1872 LIST_MODULES_32BIT
) == 0)
1878 if (EnumProcessModules (current_process_handle
, hmodules
,
1879 cb_needed
, &cb_needed
) == 0)
1883 char system_dir
[__PMAX
];
1884 char syswow_dir
[__PMAX
];
1885 size_t system_dir_len
= 0;
1886 bool convert_syswow_dir
= false;
1891 /* This fails on 32bit Windows because it has no SysWOW64 directory,
1892 and in this case a path conversion isn't necessary. */
1893 UINT len
= GetSystemWow64DirectoryA (syswow_dir
, sizeof (syswow_dir
));
1896 /* Check that we have passed a large enough buffer. */
1897 gdb_assert (len
< sizeof (syswow_dir
));
1899 len
= GetSystemDirectoryA (system_dir
, sizeof (system_dir
));
1901 gdb_assert (len
!= 0);
1902 /* Check that we have passed a large enough buffer. */
1903 gdb_assert (len
< sizeof (system_dir
));
1905 strcat (system_dir
, "\\");
1906 strcat (syswow_dir
, "\\");
1907 system_dir_len
= strlen (system_dir
);
1909 convert_syswow_dir
= true;
1913 for (i
= 1; i
< (int) (cb_needed
/ sizeof (HMODULE
)); i
++)
1917 wchar_t dll_name
[__PMAX
];
1918 char dll_name_mb
[__PMAX
];
1920 char dll_name
[__PMAX
];
1923 if (GetModuleInformation (current_process_handle
, hmodules
[i
],
1924 &mi
, sizeof (mi
)) == 0)
1926 if (GetModuleFileNameEx (current_process_handle
, hmodules
[i
],
1927 dll_name
, sizeof (dll_name
)) == 0)
1930 wcstombs (dll_name_mb
, dll_name
, __PMAX
);
1935 /* Convert the DLL path of 32bit processes returned by
1936 GetModuleFileNameEx from the 64bit system directory to the
1937 32bit syswow64 directory if necessary. */
1938 std::string syswow_dll_path
;
1939 if (convert_syswow_dir
1940 && strncasecmp (name
, system_dir
, system_dir_len
) == 0
1941 && strchr (name
+ system_dir_len
, '\\') == nullptr)
1943 syswow_dll_path
= syswow_dir
;
1944 syswow_dll_path
+= name
+ system_dir_len
;
1945 name
= syswow_dll_path
.c_str();
1948 solib_end
->next
= windows_make_so (name
, mi
.lpBaseOfDll
);
1949 solib_end
= solib_end
->next
;
1954 do_initial_windows_stuff (struct target_ops
*ops
, DWORD pid
, int attaching
)
1957 struct inferior
*inf
;
1959 last_sig
= GDB_SIGNAL_0
;
1960 open_process_used
= 0;
1961 debug_registers_changed
= 0;
1962 debug_registers_used
= 0;
1963 for (i
= 0; i
< sizeof (dr
) / sizeof (dr
[0]); i
++)
1966 cygwin_load_start
= cygwin_load_end
= 0;
1968 current_event
.dwProcessId
= pid
;
1969 memset (¤t_event
, 0, sizeof (current_event
));
1970 if (!target_is_pushed (ops
))
1972 disable_breakpoints_in_shlibs ();
1973 windows_clear_solib ();
1974 clear_proceed_status (0);
1975 init_wait_for_inferior ();
1978 ignore_first_breakpoint
= !attaching
&& wow64_process
;
1982 windows_set_context_register_offsets (amd64_mappings
);
1983 windows_set_segment_register_p (amd64_windows_segment_register_p
);
1988 windows_set_context_register_offsets (i386_mappings
);
1989 windows_set_segment_register_p (i386_windows_segment_register_p
);
1992 inf
= current_inferior ();
1993 inferior_appeared (inf
, pid
);
1994 inf
->attach_flag
= attaching
;
1996 /* Make the new process the current inferior, so terminal handling
1997 can rely on it. When attaching, we don't know about any thread
1998 id here, but that's OK --- nothing should be referencing the
1999 current thread until we report an event out of windows_wait. */
2000 inferior_ptid
= ptid_t (pid
);
2002 target_terminal::init ();
2003 target_terminal::inferior ();
2005 windows_initialization_done
= 0;
2009 struct target_waitstatus status
;
2011 ops
->wait (minus_one_ptid
, &status
, 0);
2013 /* Note windows_wait returns TARGET_WAITKIND_SPURIOUS for thread
2015 if (status
.kind
!= TARGET_WAITKIND_LOADED
2016 && status
.kind
!= TARGET_WAITKIND_SPURIOUS
)
2019 ops
->resume (minus_one_ptid
, 0, GDB_SIGNAL_0
);
2022 /* Now that the inferior has been started and all DLLs have been mapped,
2023 we can iterate over all DLLs and load them in.
2025 We avoid doing it any earlier because, on certain versions of Windows,
2026 LOAD_DLL_DEBUG_EVENTs are sometimes not complete. In particular,
2027 we have seen on Windows 8.1 that the ntdll.dll load event does not
2028 include the DLL name, preventing us from creating an associated SO.
2029 A possible explanation is that ntdll.dll might be mapped before
2030 the SO info gets created by the Windows system -- ntdll.dll is
2031 the first DLL to be reported via LOAD_DLL_DEBUG_EVENT and other DLLs
2032 do not seem to suffer from that problem.
2034 Rather than try to work around this sort of issue, it is much
2035 simpler to just ignore DLL load/unload events during the startup
2036 phase, and then process them all in one batch now. */
2037 windows_add_all_dlls ();
2039 windows_initialization_done
= 1;
2043 /* Try to set or remove a user privilege to the current process. Return -1
2044 if that fails, the previous setting of that privilege otherwise.
2046 This code is copied from the Cygwin source code and rearranged to allow
2047 dynamically loading of the needed symbols from advapi32 which is only
2048 available on NT/2K/XP. */
2050 set_process_privilege (const char *privilege
, BOOL enable
)
2052 HANDLE token_hdl
= NULL
;
2054 TOKEN_PRIVILEGES new_priv
, orig_priv
;
2058 if (!OpenProcessToken (GetCurrentProcess (),
2059 TOKEN_QUERY
| TOKEN_ADJUST_PRIVILEGES
,
2063 if (!LookupPrivilegeValueA (NULL
, privilege
, &restore_priv
))
2066 new_priv
.PrivilegeCount
= 1;
2067 new_priv
.Privileges
[0].Luid
= restore_priv
;
2068 new_priv
.Privileges
[0].Attributes
= enable
? SE_PRIVILEGE_ENABLED
: 0;
2070 if (!AdjustTokenPrivileges (token_hdl
, FALSE
, &new_priv
,
2071 sizeof orig_priv
, &orig_priv
, &size
))
2074 /* Disabled, otherwise every `attach' in an unprivileged user session
2075 would raise the "Failed to get SE_DEBUG_NAME privilege" warning in
2076 windows_attach(). */
2077 /* AdjustTokenPrivileges returns TRUE even if the privilege could not
2078 be enabled. GetLastError () returns an correct error code, though. */
2079 if (enable
&& GetLastError () == ERROR_NOT_ALL_ASSIGNED
)
2083 ret
= orig_priv
.Privileges
[0].Attributes
== SE_PRIVILEGE_ENABLED
? 1 : 0;
2087 CloseHandle (token_hdl
);
2092 /* Attach to process PID, then initialize for debugging it. */
2095 windows_nat_target::attach (const char *args
, int from_tty
)
2100 pid
= parse_pid_to_attach (args
);
2102 if (set_process_privilege (SE_DEBUG_NAME
, TRUE
) < 0)
2104 printf_unfiltered ("Warning: Failed to get SE_DEBUG_NAME privilege\n");
2105 printf_unfiltered ("This can cause attach to "
2106 "fail on Windows NT/2K/XP\n");
2109 windows_init_thread_list ();
2110 ok
= DebugActiveProcess (pid
);
2116 /* Try fall back to Cygwin pid. */
2117 pid
= cygwin_internal (CW_CYGWIN_PID_TO_WINPID
, pid
);
2120 ok
= DebugActiveProcess (pid
);
2125 error (_("Can't attach to process %u (error %u)"),
2126 (unsigned) pid
, (unsigned) GetLastError ());
2128 DebugSetProcessKillOnExit (FALSE
);
2132 const char *exec_file
= get_exec_file (0);
2135 printf_unfiltered ("Attaching to program `%s', %s\n", exec_file
,
2136 target_pid_to_str (ptid_t (pid
)).c_str ());
2138 printf_unfiltered ("Attaching to %s\n",
2139 target_pid_to_str (ptid_t (pid
)).c_str ());
2143 HANDLE h
= OpenProcess (PROCESS_QUERY_INFORMATION
, FALSE
, pid
);
2147 if (IsWow64Process (h
, &wow64
))
2148 wow64_process
= wow64
;
2153 do_initial_windows_stuff (this, pid
, 1);
2154 target_terminal::ours ();
2158 windows_nat_target::detach (inferior
*inf
, int from_tty
)
2162 ptid_t ptid
= minus_one_ptid
;
2163 resume (ptid
, 0, GDB_SIGNAL_0
);
2165 if (!DebugActiveProcessStop (current_event
.dwProcessId
))
2167 error (_("Can't detach process %u (error %u)"),
2168 (unsigned) current_event
.dwProcessId
, (unsigned) GetLastError ());
2171 DebugSetProcessKillOnExit (FALSE
);
2173 if (detached
&& from_tty
)
2175 const char *exec_file
= get_exec_file (0);
2178 printf_unfiltered ("Detaching from program: %s, Pid %u\n", exec_file
,
2179 (unsigned) current_event
.dwProcessId
);
2182 x86_cleanup_dregs ();
2183 inferior_ptid
= null_ptid
;
2184 detach_inferior (inf
);
2186 maybe_unpush_target ();
2189 /* Try to determine the executable filename.
2191 EXE_NAME_RET is a pointer to a buffer whose size is EXE_NAME_MAX_LEN.
2193 Upon success, the filename is stored inside EXE_NAME_RET, and
2194 this function returns nonzero.
2196 Otherwise, this function returns zero and the contents of
2197 EXE_NAME_RET is undefined. */
2200 windows_get_exec_module_filename (char *exe_name_ret
, size_t exe_name_max_len
)
2210 if (!EnumProcessModulesEx (current_process_handle
, &dh_buf
,
2211 sizeof (HMODULE
), &cbNeeded
,
2212 LIST_MODULES_32BIT
) || !cbNeeded
)
2218 if (!EnumProcessModules (current_process_handle
, &dh_buf
,
2219 sizeof (HMODULE
), &cbNeeded
) || !cbNeeded
)
2223 /* We know the executable is always first in the list of modules,
2224 which we just fetched. So no need to fetch more. */
2228 /* Cygwin prefers that the path be in /x/y/z format, so extract
2229 the filename into a temporary buffer first, and then convert it
2230 to POSIX format into the destination buffer. */
2231 cygwin_buf_t
*pathbuf
= (cygwin_buf_t
*) alloca (exe_name_max_len
* sizeof (cygwin_buf_t
));
2233 len
= GetModuleFileNameEx (current_process_handle
,
2234 dh_buf
, pathbuf
, exe_name_max_len
);
2236 error (_("Error getting executable filename: %u."),
2237 (unsigned) GetLastError ());
2238 if (cygwin_conv_path (CCP_WIN_W_TO_POSIX
, pathbuf
, exe_name_ret
,
2239 exe_name_max_len
) < 0)
2240 error (_("Error converting executable filename to POSIX: %d."), errno
);
2243 len
= GetModuleFileNameEx (current_process_handle
,
2244 dh_buf
, exe_name_ret
, exe_name_max_len
);
2246 error (_("Error getting executable filename: %u."),
2247 (unsigned) GetLastError ());
2250 return 1; /* success */
2253 /* The pid_to_exec_file target_ops method for this platform. */
2256 windows_nat_target::pid_to_exec_file (int pid
)
2258 static char path
[__PMAX
];
2260 /* Try to find exe name as symlink target of /proc/<pid>/exe. */
2262 char procexe
[sizeof ("/proc/4294967295/exe")];
2264 xsnprintf (procexe
, sizeof (procexe
), "/proc/%u/exe", pid
);
2265 nchars
= readlink (procexe
, path
, sizeof(path
));
2266 if (nchars
> 0 && nchars
< sizeof (path
))
2268 path
[nchars
] = '\0'; /* Got it */
2273 /* If we get here then either Cygwin is hosed, this isn't a Cygwin version
2274 of gdb, or we're trying to debug a non-Cygwin windows executable. */
2275 if (!windows_get_exec_module_filename (path
, sizeof (path
)))
2281 /* Print status information about what we're accessing. */
2284 windows_nat_target::files_info ()
2286 struct inferior
*inf
= current_inferior ();
2288 printf_unfiltered ("\tUsing the running image of %s %s.\n",
2289 inf
->attach_flag
? "attached" : "child",
2290 target_pid_to_str (inferior_ptid
).c_str ());
2293 /* Modify CreateProcess parameters for use of a new separate console.
2295 *FLAGS: DWORD parameter for general process creation flags.
2296 *SI: STARTUPINFO structure, for which the console window size and
2297 console buffer size is filled in if GDB is running in a console.
2298 to create the new console.
2299 The size of the used font is not available on all versions of
2300 Windows OS. Furthermore, the current font might not be the default
2301 font, but this is still better than before.
2302 If the windows and buffer sizes are computed,
2303 SI->DWFLAGS is changed so that this information is used
2304 by CreateProcess function. */
2307 windows_set_console_info (STARTUPINFO
*si
, DWORD
*flags
)
2309 HANDLE hconsole
= CreateFile ("CONOUT$", GENERIC_READ
| GENERIC_WRITE
,
2310 FILE_SHARE_READ
, NULL
, OPEN_EXISTING
, 0, 0);
2312 if (hconsole
!= INVALID_HANDLE_VALUE
)
2314 CONSOLE_SCREEN_BUFFER_INFO sbinfo
;
2316 CONSOLE_FONT_INFO cfi
;
2318 GetCurrentConsoleFont (hconsole
, FALSE
, &cfi
);
2319 font_size
= GetConsoleFontSize (hconsole
, cfi
.nFont
);
2320 GetConsoleScreenBufferInfo(hconsole
, &sbinfo
);
2321 si
->dwXSize
= sbinfo
.srWindow
.Right
- sbinfo
.srWindow
.Left
+ 1;
2322 si
->dwYSize
= sbinfo
.srWindow
.Bottom
- sbinfo
.srWindow
.Top
+ 1;
2324 si
->dwXSize
*= font_size
.X
;
2328 si
->dwYSize
*= font_size
.Y
;
2331 si
->dwXCountChars
= sbinfo
.dwSize
.X
;
2332 si
->dwYCountChars
= sbinfo
.dwSize
.Y
;
2333 si
->dwFlags
|= STARTF_USESIZE
| STARTF_USECOUNTCHARS
;
2335 *flags
|= CREATE_NEW_CONSOLE
;
2339 /* Function called by qsort to sort environment strings. */
2342 envvar_cmp (const void *a
, const void *b
)
2344 const char **p
= (const char **) a
;
2345 const char **q
= (const char **) b
;
2346 return strcasecmp (*p
, *q
);
2352 clear_win32_environment (char **env
)
2356 wchar_t *copy
= NULL
, *equalpos
;
2358 for (i
= 0; env
[i
] && *env
[i
]; i
++)
2360 len
= mbstowcs (NULL
, env
[i
], 0) + 1;
2361 copy
= (wchar_t *) xrealloc (copy
, len
* sizeof (wchar_t));
2362 mbstowcs (copy
, env
[i
], len
);
2363 equalpos
= wcschr (copy
, L
'=');
2366 SetEnvironmentVariableW (copy
, NULL
);
2374 /* Redirection of inferior I/O streams for native MS-Windows programs.
2375 Unlike on Unix, where this is handled by invoking the inferior via
2376 the shell, on MS-Windows we need to emulate the cmd.exe shell.
2378 The official documentation of the cmd.exe redirection features is here:
2380 http://www.microsoft.com/resources/documentation/windows/xp/all/proddocs/en-us/redirection.mspx
2382 (That page talks about Windows XP, but there's no newer
2383 documentation, so we assume later versions of cmd.exe didn't change
2386 Caveat: the documentation on that page seems to include a few lies.
2387 For example, it describes strange constructs 1<&2 and 2<&1, which
2388 seem to work only when 1>&2 resp. 2>&1 would make sense, and so I
2389 think the cmd.exe parser of the redirection symbols simply doesn't
2390 care about the < vs > distinction in these cases. Therefore, the
2391 supported features are explicitly documented below.
2393 The emulation below aims at supporting all the valid use cases
2394 supported by cmd.exe, which include:
2396 < FILE redirect standard input from FILE
2397 0< FILE redirect standard input from FILE
2398 <&N redirect standard input from file descriptor N
2399 0<&N redirect standard input from file descriptor N
2400 > FILE redirect standard output to FILE
2401 >> FILE append standard output to FILE
2402 1>> FILE append standard output to FILE
2403 >&N redirect standard output to file descriptor N
2404 1>&N redirect standard output to file descriptor N
2405 >>&N append standard output to file descriptor N
2406 1>>&N append standard output to file descriptor N
2407 2> FILE redirect standard error to FILE
2408 2>> FILE append standard error to FILE
2409 2>&N redirect standard error to file descriptor N
2410 2>>&N append standard error to file descriptor N
2412 Note that using N > 2 in the above construct is supported, but
2413 requires that the corresponding file descriptor be open by some
2414 means elsewhere or outside GDB. Also note that using ">&0" or
2415 "<&2" will generally fail, because the file descriptor redirected
2416 from is normally open in an incompatible mode (e.g., FD 0 is open
2417 for reading only). IOW, use of such tricks is not recommended;
2418 you are on your own.
2420 We do NOT support redirection of file descriptors above 2, as in
2421 "3>SOME-FILE", because MinGW compiled programs don't (supporting
2422 that needs special handling in the startup code that MinGW
2423 doesn't have). Pipes are also not supported.
2425 As for invalid use cases, where the redirection contains some
2426 error, the emulation below will detect that and produce some
2427 error and/or failure. But the behavior in those cases is not
2428 bug-for-bug compatible with what cmd.exe does in those cases.
2429 That's because what cmd.exe does then is not well defined, and
2430 seems to be a side effect of the cmd.exe parsing of the command
2431 line more than anything else. For example, try redirecting to an
2432 invalid file name, as in "> foo:bar".
2434 There are also minor syntactic deviations from what cmd.exe does
2435 in some corner cases. For example, it doesn't support the likes
2436 of "> &foo" to mean redirect to file named literally "&foo"; we
2437 do support that here, because that, too, sounds like some issue
2438 with the cmd.exe parser. Another nicety is that we support
2439 redirection targets that use file names with forward slashes,
2440 something cmd.exe doesn't -- this comes in handy since GDB
2441 file-name completion can be used when typing the command line for
2444 /* Support routines for redirecting standard handles of the inferior. */
2446 /* Parse a single redirection spec, open/duplicate the specified
2447 file/fd, and assign the appropriate value to one of the 3 standard
2448 file descriptors. */
2450 redir_open (const char *redir_string
, int *inp
, int *out
, int *err
)
2452 int *fd
, ref_fd
= -2;
2454 const char *fname
= redir_string
+ 1;
2455 int rc
= *redir_string
;
2470 fd
= (rc
== '2') ? err
: out
;
2471 mode
= O_WRONLY
| O_CREAT
;
2484 if (*fname
== '&' && '0' <= fname
[1] && fname
[1] <= '9')
2486 /* A reference to a file descriptor. */
2488 ref_fd
= (int) strtol (fname
+ 1, &fdtail
, 10);
2489 if (fdtail
> fname
+ 1 && *fdtail
== '\0')
2491 /* Don't allow redirection when open modes are incompatible. */
2492 if ((ref_fd
== 0 && (fd
== out
|| fd
== err
))
2493 || ((ref_fd
== 1 || ref_fd
== 2) && fd
== inp
))
2500 else if (ref_fd
== 1)
2502 else if (ref_fd
== 2)
2512 fname
++; /* skip the separator space */
2513 /* If the descriptor is already open, close it. This allows
2514 multiple specs of redirections for the same stream, which is
2515 somewhat nonsensical, but still valid and supported by cmd.exe.
2516 (But cmd.exe only opens a single file in this case, the one
2517 specified by the last redirection spec on the command line.) */
2522 *fd
= _open (fname
, mode
, _S_IREAD
| _S_IWRITE
);
2526 else if (ref_fd
== -1)
2527 *fd
= -1; /* reset to default destination */
2530 *fd
= _dup (ref_fd
);
2534 /* _open just sets a flag for O_APPEND, which won't be passed to the
2535 inferior, so we need to actually move the file pointer. */
2536 if ((mode
& O_APPEND
) != 0)
2537 _lseek (*fd
, 0L, SEEK_END
);
2541 /* Canonicalize a single redirection spec and set up the corresponding
2542 file descriptor as specified. */
2544 redir_set_redirection (const char *s
, int *inp
, int *out
, int *err
)
2546 char buf
[__PMAX
+ 2 + 5]; /* extra space for quotes & redirection string */
2548 const char *start
= s
;
2551 *d
++ = *s
++; /* copy the 1st character, < or > or a digit */
2552 if ((*start
== '>' || *start
== '1' || *start
== '2')
2556 if (*s
== '>' && *start
!= '>')
2559 else if (*start
== '0' && *s
== '<')
2561 /* cmd.exe recognizes "&N" only immediately after the redirection symbol. */
2564 while (isspace (*s
)) /* skip whitespace before file name */
2566 *d
++ = ' '; /* separate file name with a single space */
2569 /* Copy the file name. */
2572 /* Remove quoting characters from the file name in buf[]. */
2573 if (*s
== '"') /* could support '..' quoting here */
2577 else if (*s
== quote
)
2585 else if (*s
== '\\')
2587 if (s
[1] == '"') /* could support '..' here */
2591 else if (isspace (*s
) && !quote
)
2595 if (d
- buf
>= sizeof (buf
) - 1)
2597 errno
= ENAMETOOLONG
;
2603 /* Windows doesn't allow redirection characters in file names, so we
2604 can bail out early if they use them, or if there's no target file
2605 name after the redirection symbol. */
2606 if (d
[-1] == '>' || d
[-1] == '<')
2611 if (redir_open (buf
, inp
, out
, err
) == 0)
2616 /* Parse the command line for redirection specs and prepare the file
2617 descriptors for the 3 standard streams accordingly. */
2619 redirect_inferior_handles (const char *cmd_orig
, char *cmd
,
2620 int *inp
, int *out
, int *err
)
2622 const char *s
= cmd_orig
;
2625 bool retval
= false;
2627 while (isspace (*s
))
2632 if (*s
== '"') /* could also support '..' quoting here */
2636 else if (*s
== quote
)
2639 else if (*s
== '\\')
2641 if (s
[1] == '"') /* escaped quote char */
2646 /* Process a single redirection candidate. */
2647 if (*s
== '<' || *s
== '>'
2648 || ((*s
== '1' || *s
== '2') && s
[1] == '>')
2649 || (*s
== '0' && s
[1] == '<'))
2651 int skip
= redir_set_redirection (s
, inp
, out
, err
);
2665 #endif /* !__CYGWIN__ */
2667 /* Start an inferior windows child process and sets inferior_ptid to its pid.
2668 EXEC_FILE is the file to run.
2669 ALLARGS is a string containing the arguments to the program.
2670 ENV is the environment vector to pass. Errors reported with error(). */
2673 windows_nat_target::create_inferior (const char *exec_file
,
2674 const std::string
&origallargs
,
2675 char **in_env
, int from_tty
)
2679 cygwin_buf_t real_path
[__PMAX
];
2680 cygwin_buf_t shell
[__PMAX
]; /* Path to shell */
2681 cygwin_buf_t infcwd
[__PMAX
];
2683 cygwin_buf_t
*toexec
;
2684 cygwin_buf_t
*cygallargs
;
2686 char **old_env
= NULL
;
2690 int ostdin
, ostdout
, ostderr
;
2691 #else /* !__CYGWIN__ */
2692 char shell
[__PMAX
]; /* Path to shell */
2694 char *args
, *allargs_copy
;
2695 size_t args_len
, allargs_len
;
2696 int fd_inp
= -1, fd_out
= -1, fd_err
= -1;
2697 HANDLE tty
= INVALID_HANDLE_VALUE
;
2698 bool redirected
= false;
2705 #endif /* !__CYGWIN__ */
2706 const char *allargs
= origallargs
.c_str ();
2707 PROCESS_INFORMATION pi
;
2710 const char *inferior_io_terminal
= get_inferior_io_terminal ();
2713 error (_("No executable specified, use `target exec'."));
2715 const char *inferior_cwd
= get_inferior_cwd ();
2716 std::string expanded_infcwd
;
2717 if (inferior_cwd
!= NULL
)
2719 expanded_infcwd
= gdb_tilde_expand (inferior_cwd
);
2720 /* Mirror slashes on inferior's cwd. */
2721 std::replace (expanded_infcwd
.begin (), expanded_infcwd
.end (),
2723 inferior_cwd
= expanded_infcwd
.c_str ();
2726 memset (&si
, 0, sizeof (si
));
2727 si
.cb
= sizeof (si
);
2730 flags
|= CREATE_NEW_PROCESS_GROUP
;
2733 windows_set_console_info (&si
, &flags
);
2738 flags
|= DEBUG_ONLY_THIS_PROCESS
;
2739 if (cygwin_conv_path (CCP_POSIX_TO_WIN_W
, exec_file
, real_path
,
2740 __PMAX
* sizeof (cygwin_buf_t
)) < 0)
2741 error (_("Error starting executable: %d"), errno
);
2744 len
= mbstowcs (NULL
, allargs
, 0) + 1;
2745 if (len
== (size_t) -1)
2746 error (_("Error starting executable: %d"), errno
);
2747 cygallargs
= (wchar_t *) alloca (len
* sizeof (wchar_t));
2748 mbstowcs (cygallargs
, allargs
, len
);
2749 #else /* !__USEWIDE */
2750 cygallargs
= allargs
;
2756 if (cygwin_conv_path (CCP_POSIX_TO_WIN_W
, sh
, shell
, __PMAX
) < 0)
2757 error (_("Error starting executable via shell: %d"), errno
);
2759 len
= sizeof (L
" -c 'exec '") + mbstowcs (NULL
, exec_file
, 0)
2760 + mbstowcs (NULL
, allargs
, 0) + 2;
2761 cygallargs
= (wchar_t *) alloca (len
* sizeof (wchar_t));
2762 swprintf (cygallargs
, len
, L
" -c 'exec %s %s'", exec_file
, allargs
);
2763 #else /* !__USEWIDE */
2764 len
= (sizeof (" -c 'exec '") + strlen (exec_file
)
2765 + strlen (allargs
) + 2);
2766 cygallargs
= (char *) alloca (len
);
2767 xsnprintf (cygallargs
, len
, " -c 'exec %s %s'", exec_file
, allargs
);
2768 #endif /* __USEWIDE */
2770 flags
|= DEBUG_PROCESS
;
2773 if (inferior_cwd
!= NULL
2774 && cygwin_conv_path (CCP_POSIX_TO_WIN_W
, inferior_cwd
,
2775 infcwd
, strlen (inferior_cwd
)) < 0)
2776 error (_("Error converting inferior cwd: %d"), errno
);
2779 args
= (cygwin_buf_t
*) alloca ((wcslen (toexec
) + wcslen (cygallargs
) + 2)
2780 * sizeof (wchar_t));
2781 wcscpy (args
, toexec
);
2782 wcscat (args
, L
" ");
2783 wcscat (args
, cygallargs
);
2784 #else /* !__USEWIDE */
2785 args
= (cygwin_buf_t
*) alloca (strlen (toexec
) + strlen (cygallargs
) + 2);
2786 strcpy (args
, toexec
);
2788 strcat (args
, cygallargs
);
2789 #endif /* !__USEWIDE */
2791 #ifdef CW_CVT_ENV_TO_WINENV
2792 /* First try to create a direct Win32 copy of the POSIX environment. */
2793 w32_env
= (PWCHAR
) cygwin_internal (CW_CVT_ENV_TO_WINENV
, in_env
);
2794 if (w32_env
!= (PWCHAR
) -1)
2795 flags
|= CREATE_UNICODE_ENVIRONMENT
;
2797 /* If that fails, fall back to old method tweaking GDB's environment. */
2798 #endif /* CW_CVT_ENV_TO_WINENV */
2800 /* Reset all Win32 environment variables to avoid leftover on next run. */
2801 clear_win32_environment (environ
);
2802 /* Prepare the environment vars for CreateProcess. */
2805 cygwin_internal (CW_SYNC_WINENV
);
2809 if (!inferior_io_terminal
)
2810 tty
= ostdin
= ostdout
= ostderr
= -1;
2813 tty
= open (inferior_io_terminal
, O_RDWR
| O_NOCTTY
);
2816 print_sys_errmsg (inferior_io_terminal
, errno
);
2817 ostdin
= ostdout
= ostderr
= -1;
2830 windows_init_thread_list ();
2831 ret
= CreateProcess (0,
2832 args
, /* command line */
2833 NULL
, /* Security */
2835 TRUE
, /* inherit handles */
2836 flags
, /* start flags */
2837 w32_env
, /* environment */
2838 inferior_cwd
!= NULL
? infcwd
: NULL
, /* current
2843 /* Just free the Win32 environment, if it could be created. */
2847 /* Reset all environment variables to avoid leftover on next run. */
2848 clear_win32_environment (in_env
);
2849 /* Restore normal GDB environment variables. */
2851 cygwin_internal (CW_SYNC_WINENV
);
2864 #else /* !__CYGWIN__ */
2865 allargs_len
= strlen (allargs
);
2866 allargs_copy
= strcpy ((char *) alloca (allargs_len
+ 1), allargs
);
2867 if (strpbrk (allargs_copy
, "<>") != NULL
)
2872 redirect_inferior_handles (allargs
, allargs_copy
,
2873 &fd_inp
, &fd_out
, &fd_err
);
2875 warning (_("Error in redirection: %s."), safe_strerror (errno
));
2878 allargs_len
= strlen (allargs_copy
);
2880 /* If not all the standard streams are redirected by the command
2881 line, use inferior_io_terminal for those which aren't. */
2882 if (inferior_io_terminal
2883 && !(fd_inp
>= 0 && fd_out
>= 0 && fd_err
>= 0))
2885 SECURITY_ATTRIBUTES sa
;
2886 sa
.nLength
= sizeof(sa
);
2887 sa
.lpSecurityDescriptor
= 0;
2888 sa
.bInheritHandle
= TRUE
;
2889 tty
= CreateFileA (inferior_io_terminal
, GENERIC_READ
| GENERIC_WRITE
,
2890 0, &sa
, OPEN_EXISTING
, FILE_ATTRIBUTE_NORMAL
, 0);
2891 if (tty
== INVALID_HANDLE_VALUE
)
2892 warning (_("Warning: Failed to open TTY %s, error %#x."),
2893 inferior_io_terminal
, (unsigned) GetLastError ());
2895 if (redirected
|| tty
!= INVALID_HANDLE_VALUE
)
2898 si
.hStdInput
= (HANDLE
) _get_osfhandle (fd_inp
);
2899 else if (tty
!= INVALID_HANDLE_VALUE
)
2902 si
.hStdInput
= GetStdHandle (STD_INPUT_HANDLE
);
2904 si
.hStdOutput
= (HANDLE
) _get_osfhandle (fd_out
);
2905 else if (tty
!= INVALID_HANDLE_VALUE
)
2906 si
.hStdOutput
= tty
;
2908 si
.hStdOutput
= GetStdHandle (STD_OUTPUT_HANDLE
);
2910 si
.hStdError
= (HANDLE
) _get_osfhandle (fd_err
);
2911 else if (tty
!= INVALID_HANDLE_VALUE
)
2914 si
.hStdError
= GetStdHandle (STD_ERROR_HANDLE
);
2915 si
.dwFlags
|= STARTF_USESTDHANDLES
;
2919 /* Build the command line, a space-separated list of tokens where
2920 the first token is the name of the module to be executed.
2921 To avoid ambiguities introduced by spaces in the module name,
2923 args_len
= strlen (toexec
) + 2 /* quotes */ + allargs_len
+ 2;
2924 args
= (char *) alloca (args_len
);
2925 xsnprintf (args
, args_len
, "\"%s\" %s", toexec
, allargs_copy
);
2927 flags
|= DEBUG_ONLY_THIS_PROCESS
;
2929 /* CreateProcess takes the environment list as a null terminated set of
2930 strings (i.e. two nulls terminate the list). */
2932 /* Get total size for env strings. */
2933 for (envlen
= 0, i
= 0; in_env
[i
] && *in_env
[i
]; i
++)
2934 envlen
+= strlen (in_env
[i
]) + 1;
2936 envsize
= sizeof (in_env
[0]) * (i
+ 1);
2937 env
= (char **) alloca (envsize
);
2938 memcpy (env
, in_env
, envsize
);
2939 /* Windows programs expect the environment block to be sorted. */
2940 qsort (env
, i
, sizeof (char *), envvar_cmp
);
2942 w32env
= (char *) alloca (envlen
+ 1);
2944 /* Copy env strings into new buffer. */
2945 for (temp
= w32env
, i
= 0; env
[i
] && *env
[i
]; i
++)
2947 strcpy (temp
, env
[i
]);
2948 temp
+= strlen (temp
) + 1;
2951 /* Final nil string to terminate new env. */
2954 windows_init_thread_list ();
2955 ret
= CreateProcessA (0,
2956 args
, /* command line */
2957 NULL
, /* Security */
2959 TRUE
, /* inherit handles */
2960 flags
, /* start flags */
2961 w32env
, /* environment */
2962 inferior_cwd
, /* current directory */
2965 if (tty
!= INVALID_HANDLE_VALUE
)
2973 #endif /* !__CYGWIN__ */
2976 error (_("Error creating process %s, (error %u)."),
2977 exec_file
, (unsigned) GetLastError ());
2981 if (IsWow64Process (pi
.hProcess
, &wow64
))
2982 wow64_process
= wow64
;
2985 CloseHandle (pi
.hThread
);
2986 CloseHandle (pi
.hProcess
);
2988 if (useshell
&& shell
[0] != '\0')
2993 do_initial_windows_stuff (this, pi
.dwProcessId
, 0);
2995 /* windows_continue (DBG_CONTINUE, -1, 0); */
2999 windows_nat_target::mourn_inferior ()
3001 (void) windows_continue (DBG_CONTINUE
, -1, 0);
3002 x86_cleanup_dregs();
3003 if (open_process_used
)
3005 CHECK (CloseHandle (current_process_handle
));
3006 open_process_used
= 0;
3008 siginfo_er
.ExceptionCode
= 0;
3009 inf_child_target::mourn_inferior ();
3012 /* Send a SIGINT to the process group. This acts just like the user typed a
3013 ^C on the controlling terminal. */
3016 windows_nat_target::interrupt ()
3018 DEBUG_EVENTS (("gdb: GenerateConsoleCtrlEvent (CTRLC_EVENT, 0)\n"));
3019 CHECK (GenerateConsoleCtrlEvent (CTRL_C_EVENT
, current_event
.dwProcessId
));
3020 registers_changed (); /* refresh register state */
3023 /* Helper for windows_xfer_partial that handles memory transfers.
3024 Arguments are like target_xfer_partial. */
3026 static enum target_xfer_status
3027 windows_xfer_memory (gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
3028 ULONGEST memaddr
, ULONGEST len
, ULONGEST
*xfered_len
)
3032 DWORD lasterror
= 0;
3034 if (writebuf
!= NULL
)
3036 DEBUG_MEM (("gdb: write target memory, %s bytes at %s\n",
3037 pulongest (len
), core_addr_to_string (memaddr
)));
3038 success
= WriteProcessMemory (current_process_handle
,
3039 (LPVOID
) (uintptr_t) memaddr
, writebuf
,
3042 lasterror
= GetLastError ();
3043 FlushInstructionCache (current_process_handle
,
3044 (LPCVOID
) (uintptr_t) memaddr
, len
);
3048 DEBUG_MEM (("gdb: read target memory, %s bytes at %s\n",
3049 pulongest (len
), core_addr_to_string (memaddr
)));
3050 success
= ReadProcessMemory (current_process_handle
,
3051 (LPCVOID
) (uintptr_t) memaddr
, readbuf
,
3054 lasterror
= GetLastError ();
3056 *xfered_len
= (ULONGEST
) done
;
3057 if (!success
&& lasterror
== ERROR_PARTIAL_COPY
&& done
> 0)
3058 return TARGET_XFER_OK
;
3060 return success
? TARGET_XFER_OK
: TARGET_XFER_E_IO
;
3064 windows_nat_target::kill ()
3066 CHECK (TerminateProcess (current_process_handle
, 0));
3070 if (!windows_continue (DBG_CONTINUE
, -1, 1))
3072 if (!wait_for_debug_event (¤t_event
, INFINITE
))
3074 if (current_event
.dwDebugEventCode
== EXIT_PROCESS_DEBUG_EVENT
)
3078 target_mourn_inferior (inferior_ptid
); /* Or just windows_mourn_inferior? */
3082 windows_nat_target::close ()
3084 DEBUG_EVENTS (("gdb: windows_close, inferior_ptid=%d\n",
3085 inferior_ptid
.pid ()));
3088 /* Convert pid to printable format. */
3090 windows_nat_target::pid_to_str (ptid_t ptid
)
3092 if (ptid
.lwp () != 0)
3093 return string_printf ("Thread %d.0x%lx", ptid
.pid (), ptid
.lwp ());
3095 return normal_pid_to_str (ptid
);
3098 static enum target_xfer_status
3099 windows_xfer_shared_libraries (struct target_ops
*ops
,
3100 enum target_object object
, const char *annex
,
3101 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
3102 ULONGEST offset
, ULONGEST len
,
3103 ULONGEST
*xfered_len
)
3105 struct obstack obstack
;
3111 return TARGET_XFER_E_IO
;
3113 obstack_init (&obstack
);
3114 obstack_grow_str (&obstack
, "<library-list>\n");
3115 for (so
= solib_start
.next
; so
; so
= so
->next
)
3117 lm_info_windows
*li
= (lm_info_windows
*) so
->lm_info
;
3119 windows_xfer_shared_library (so
->so_name
, (CORE_ADDR
)
3120 (uintptr_t) li
->load_addr
,
3122 target_gdbarch (), &obstack
);
3124 obstack_grow_str0 (&obstack
, "</library-list>\n");
3126 buf
= (const char *) obstack_finish (&obstack
);
3127 len_avail
= strlen (buf
);
3128 if (offset
>= len_avail
)
3132 if (len
> len_avail
- offset
)
3133 len
= len_avail
- offset
;
3134 memcpy (readbuf
, buf
+ offset
, len
);
3137 obstack_free (&obstack
, NULL
);
3138 *xfered_len
= (ULONGEST
) len
;
3139 return len
!= 0 ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
3142 /* Helper for windows_nat_target::xfer_partial that handles signal info. */
3144 static enum target_xfer_status
3145 windows_xfer_siginfo (gdb_byte
*readbuf
, ULONGEST offset
, ULONGEST len
,
3146 ULONGEST
*xfered_len
)
3148 char *buf
= (char *) &siginfo_er
;
3149 size_t bufsize
= sizeof (siginfo_er
);
3152 EXCEPTION_RECORD32 er32
;
3155 buf
= (char *) &er32
;
3156 bufsize
= sizeof (er32
);
3158 er32
.ExceptionCode
= siginfo_er
.ExceptionCode
;
3159 er32
.ExceptionFlags
= siginfo_er
.ExceptionFlags
;
3160 er32
.ExceptionRecord
= (uintptr_t) siginfo_er
.ExceptionRecord
;
3161 er32
.ExceptionAddress
= (uintptr_t) siginfo_er
.ExceptionAddress
;
3162 er32
.NumberParameters
= siginfo_er
.NumberParameters
;
3164 for (i
= 0; i
< EXCEPTION_MAXIMUM_PARAMETERS
; i
++)
3165 er32
.ExceptionInformation
[i
] = siginfo_er
.ExceptionInformation
[i
];
3169 if (siginfo_er
.ExceptionCode
== 0)
3170 return TARGET_XFER_E_IO
;
3172 if (readbuf
== nullptr)
3173 return TARGET_XFER_E_IO
;
3175 if (offset
> bufsize
)
3176 return TARGET_XFER_E_IO
;
3178 if (offset
+ len
> bufsize
)
3179 len
= bufsize
- offset
;
3181 memcpy (readbuf
, buf
+ offset
, len
);
3184 return TARGET_XFER_OK
;
3187 enum target_xfer_status
3188 windows_nat_target::xfer_partial (enum target_object object
,
3189 const char *annex
, gdb_byte
*readbuf
,
3190 const gdb_byte
*writebuf
, ULONGEST offset
,
3191 ULONGEST len
, ULONGEST
*xfered_len
)
3195 case TARGET_OBJECT_MEMORY
:
3196 return windows_xfer_memory (readbuf
, writebuf
, offset
, len
, xfered_len
);
3198 case TARGET_OBJECT_LIBRARIES
:
3199 return windows_xfer_shared_libraries (this, object
, annex
, readbuf
,
3200 writebuf
, offset
, len
, xfered_len
);
3202 case TARGET_OBJECT_SIGNAL_INFO
:
3203 return windows_xfer_siginfo (readbuf
, offset
, len
, xfered_len
);
3206 if (beneath () == NULL
)
3208 /* This can happen when requesting the transfer of unsupported
3209 objects before a program has been started (and therefore
3210 with the current_target having no target beneath). */
3211 return TARGET_XFER_E_IO
;
3213 return beneath ()->xfer_partial (object
, annex
,
3214 readbuf
, writebuf
, offset
, len
,
3219 /* Provide thread local base, i.e. Thread Information Block address.
3220 Returns 1 if ptid is found and sets *ADDR to thread_local_base. */
3223 windows_nat_target::get_tib_address (ptid_t ptid
, CORE_ADDR
*addr
)
3225 windows_thread_info
*th
;
3227 th
= thread_rec (ptid
, DONT_INVALIDATE_CONTEXT
);
3232 *addr
= th
->thread_local_base
;
3238 windows_nat_target::get_ada_task_ptid (long lwp
, long thread
)
3240 return ptid_t (inferior_ptid
.pid (), lwp
, 0);
3243 /* Implementation of the to_thread_name method. */
3246 windows_nat_target::thread_name (struct thread_info
*thr
)
3248 return thread_rec (thr
->ptid
, DONT_INVALIDATE_CONTEXT
)->name
.get ();
3252 void _initialize_windows_nat ();
3254 _initialize_windows_nat ()
3256 x86_dr_low
.set_control
= cygwin_set_dr7
;
3257 x86_dr_low
.set_addr
= cygwin_set_dr
;
3258 x86_dr_low
.get_addr
= cygwin_get_dr
;
3259 x86_dr_low
.get_status
= cygwin_get_dr6
;
3260 x86_dr_low
.get_control
= cygwin_get_dr7
;
3262 /* x86_dr_low.debug_register_length field is set by
3263 calling x86_set_debug_register_length function
3264 in processor windows specific native file. */
3266 add_inf_child_target (&the_windows_nat_target
);
3269 cygwin_internal (CW_SET_DOS_FILE_WARNING
, 0);
3272 add_com ("signal-event", class_run
, signal_event_command
, _("\
3273 Signal a crashed process with event ID, to allow its debugging.\n\
3274 This command is needed in support of setting up GDB as JIT debugger on \
3275 MS-Windows. The command should be invoked from the GDB command line using \
3276 the '-ex' command-line option. The ID of the event that blocks the \
3277 crashed process will be supplied by the Windows JIT debugging mechanism."));
3280 add_setshow_boolean_cmd ("shell", class_support
, &useshell
, _("\
3281 Set use of shell to start subprocess."), _("\
3282 Show use of shell to start subprocess."), NULL
,
3284 NULL
, /* FIXME: i18n: */
3285 &setlist
, &showlist
);
3287 add_setshow_boolean_cmd ("cygwin-exceptions", class_support
,
3288 &cygwin_exceptions
, _("\
3289 Break when an exception is detected in the Cygwin DLL itself."), _("\
3290 Show whether gdb breaks on exceptions in the Cygwin DLL itself."), NULL
,
3292 NULL
, /* FIXME: i18n: */
3293 &setlist
, &showlist
);
3296 add_setshow_boolean_cmd ("new-console", class_support
, &new_console
, _("\
3297 Set creation of new console when creating child process."), _("\
3298 Show creation of new console when creating child process."), NULL
,
3300 NULL
, /* FIXME: i18n: */
3301 &setlist
, &showlist
);
3303 add_setshow_boolean_cmd ("new-group", class_support
, &new_group
, _("\
3304 Set creation of new group when creating child process."), _("\
3305 Show creation of new group when creating child process."), NULL
,
3307 NULL
, /* FIXME: i18n: */
3308 &setlist
, &showlist
);
3310 add_setshow_boolean_cmd ("debugexec", class_support
, &debug_exec
, _("\
3311 Set whether to display execution in child process."), _("\
3312 Show whether to display execution in child process."), NULL
,
3314 NULL
, /* FIXME: i18n: */
3315 &setlist
, &showlist
);
3317 add_setshow_boolean_cmd ("debugevents", class_support
, &debug_events
, _("\
3318 Set whether to display kernel events in child process."), _("\
3319 Show whether to display kernel events in child process."), NULL
,
3321 NULL
, /* FIXME: i18n: */
3322 &setlist
, &showlist
);
3324 add_setshow_boolean_cmd ("debugmemory", class_support
, &debug_memory
, _("\
3325 Set whether to display memory accesses in child process."), _("\
3326 Show whether to display memory accesses in child process."), NULL
,
3328 NULL
, /* FIXME: i18n: */
3329 &setlist
, &showlist
);
3331 add_setshow_boolean_cmd ("debugexceptions", class_support
,
3332 &debug_exceptions
, _("\
3333 Set whether to display kernel exceptions in child process."), _("\
3334 Show whether to display kernel exceptions in child process."), NULL
,
3336 NULL
, /* FIXME: i18n: */
3337 &setlist
, &showlist
);
3339 init_w32_command_list ();
3341 add_cmd ("selector", class_info
, display_selectors
,
3342 _("Display selectors infos."),
3346 /* Hardware watchpoint support, adapted from go32-nat.c code. */
3348 /* Pass the address ADDR to the inferior in the I'th debug register.
3349 Here we just store the address in dr array, the registers will be
3350 actually set up when windows_continue is called. */
3352 cygwin_set_dr (int i
, CORE_ADDR addr
)
3355 internal_error (__FILE__
, __LINE__
,
3356 _("Invalid register %d in cygwin_set_dr.\n"), i
);
3358 debug_registers_changed
= 1;
3359 debug_registers_used
= 1;
3362 /* Pass the value VAL to the inferior in the DR7 debug control
3363 register. Here we just store the address in D_REGS, the watchpoint
3364 will be actually set up in windows_wait. */
3366 cygwin_set_dr7 (unsigned long val
)
3368 dr
[7] = (CORE_ADDR
) val
;
3369 debug_registers_changed
= 1;
3370 debug_registers_used
= 1;
3373 /* Get the value of debug register I from the inferior. */
3376 cygwin_get_dr (int i
)
3381 /* Get the value of the DR6 debug status register from the inferior.
3382 Here we just return the value stored in dr[6]
3383 by the last call to thread_rec for current_event.dwThreadId id. */
3384 static unsigned long
3385 cygwin_get_dr6 (void)
3387 return (unsigned long) dr
[6];
3390 /* Get the value of the DR7 debug status register from the inferior.
3391 Here we just return the value stored in dr[7] by the last call to
3392 thread_rec for current_event.dwThreadId id. */
3394 static unsigned long
3395 cygwin_get_dr7 (void)
3397 return (unsigned long) dr
[7];
3400 /* Determine if the thread referenced by "ptid" is alive
3401 by "polling" it. If WaitForSingleObject returns WAIT_OBJECT_0
3402 it means that the thread has died. Otherwise it is assumed to be alive. */
3405 windows_nat_target::thread_alive (ptid_t ptid
)
3407 gdb_assert (ptid
.lwp () != 0);
3409 return (WaitForSingleObject (thread_rec (ptid
, DONT_INVALIDATE_CONTEXT
)->h
, 0)
3413 void _initialize_check_for_gdb_ini ();
3415 _initialize_check_for_gdb_ini ()
3418 if (inhibit_gdbinit
)
3421 homedir
= getenv ("HOME");
3425 char *oldini
= (char *) alloca (strlen (homedir
) +
3426 sizeof ("gdb.ini") + 1);
3427 strcpy (oldini
, homedir
);
3428 p
= strchr (oldini
, '\0');
3429 if (p
> oldini
&& !IS_DIR_SEPARATOR (p
[-1]))
3431 strcpy (p
, "gdb.ini");
3432 if (access (oldini
, 0) == 0)
3434 int len
= strlen (oldini
);
3435 char *newini
= (char *) alloca (len
+ 2);
3437 xsnprintf (newini
, len
+ 2, "%.*s.gdbinit",
3438 (int) (len
- (sizeof ("gdb.ini") - 1)), oldini
);
3439 warning (_("obsolete '%s' found. Rename to '%s'."), oldini
, newini
);
3444 /* Define dummy functions which always return error for the rare cases where
3445 these functions could not be found. */
3447 bad_DebugActiveProcessStop (DWORD w
)
3452 bad_DebugBreakProcess (HANDLE w
)
3457 bad_DebugSetProcessKillOnExit (BOOL w
)
3462 bad_EnumProcessModules (HANDLE w
, HMODULE
*x
, DWORD y
, LPDWORD z
)
3469 bad_GetModuleFileNameExW (HANDLE w
, HMODULE x
, LPWSTR y
, DWORD z
)
3475 bad_GetModuleFileNameExA (HANDLE w
, HMODULE x
, LPSTR y
, DWORD z
)
3482 bad_GetModuleInformation (HANDLE w
, HMODULE x
, LPMODULEINFO y
, DWORD z
)
3488 bad_OpenProcessToken (HANDLE w
, DWORD x
, PHANDLE y
)
3494 bad_GetCurrentConsoleFont (HANDLE w
, BOOL bMaxWindow
, CONSOLE_FONT_INFO
*f
)
3500 bad_GetConsoleFontSize (HANDLE w
, DWORD nFont
)
3508 /* Load any functions which may not be available in ancient versions
3511 void _initialize_loadable ();
3513 _initialize_loadable ()
3517 #define GPA(m, func) \
3518 func = (func ## _ftype *) GetProcAddress (m, #func)
3520 hm
= LoadLibrary ("kernel32.dll");
3523 GPA (hm
, DebugActiveProcessStop
);
3524 GPA (hm
, DebugBreakProcess
);
3525 GPA (hm
, DebugSetProcessKillOnExit
);
3526 GPA (hm
, GetConsoleFontSize
);
3527 GPA (hm
, DebugActiveProcessStop
);
3528 GPA (hm
, GetCurrentConsoleFont
);
3530 GPA (hm
, Wow64SuspendThread
);
3531 GPA (hm
, Wow64GetThreadContext
);
3532 GPA (hm
, Wow64SetThreadContext
);
3533 GPA (hm
, Wow64GetThreadSelectorEntry
);
3537 /* Set variables to dummy versions of these processes if the function
3538 wasn't found in kernel32.dll. */
3539 if (!DebugBreakProcess
)
3540 DebugBreakProcess
= bad_DebugBreakProcess
;
3541 if (!DebugActiveProcessStop
|| !DebugSetProcessKillOnExit
)
3543 DebugActiveProcessStop
= bad_DebugActiveProcessStop
;
3544 DebugSetProcessKillOnExit
= bad_DebugSetProcessKillOnExit
;
3546 if (!GetConsoleFontSize
)
3547 GetConsoleFontSize
= bad_GetConsoleFontSize
;
3548 if (!GetCurrentConsoleFont
)
3549 GetCurrentConsoleFont
= bad_GetCurrentConsoleFont
;
3551 /* Load optional functions used for retrieving filename information
3552 associated with the currently debugged process or its dlls. */
3553 hm
= LoadLibrary ("psapi.dll");
3556 GPA (hm
, EnumProcessModules
);
3558 GPA (hm
, EnumProcessModulesEx
);
3560 GPA (hm
, GetModuleInformation
);
3561 GetModuleFileNameEx
= (GetModuleFileNameEx_ftype
*)
3562 GetProcAddress (hm
, GetModuleFileNameEx_name
);
3565 if (!EnumProcessModules
|| !GetModuleInformation
|| !GetModuleFileNameEx
)
3567 /* Set variables to dummy versions of these processes if the function
3568 wasn't found in psapi.dll. */
3569 EnumProcessModules
= bad_EnumProcessModules
;
3570 GetModuleInformation
= bad_GetModuleInformation
;
3571 GetModuleFileNameEx
= bad_GetModuleFileNameEx
;
3572 /* This will probably fail on Windows 9x/Me. Let the user know
3573 that we're missing some functionality. */
3575 cannot automatically find executable file or library to read symbols.\n\
3576 Use \"file\" or \"dll\" command to load executable/libraries directly."));
3579 hm
= LoadLibrary ("advapi32.dll");
3582 GPA (hm
, OpenProcessToken
);
3583 GPA (hm
, LookupPrivilegeValueA
);
3584 GPA (hm
, AdjustTokenPrivileges
);
3585 /* Only need to set one of these since if OpenProcessToken fails nothing
3587 if (!OpenProcessToken
|| !LookupPrivilegeValueA
3588 || !AdjustTokenPrivileges
)
3589 OpenProcessToken
= bad_OpenProcessToken
;