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) debug_printf x
221 #define DEBUG_EVENTS(x) if (debug_events) debug_printf x
222 #define DEBUG_MEM(x) if (debug_memory) debug_printf x
223 #define DEBUG_EXCEPT(x) if (debug_exceptions) debug_printf 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;
241 static bool new_console
= false;
243 static bool cygwin_exceptions
= false;
245 static bool new_group
= true;
246 static bool debug_exec
= false; /* show execution */
247 static bool debug_events
= false; /* show events from kernel */
248 static bool debug_memory
= false; /* show target memory accesses */
249 static bool debug_exceptions
= false; /* show target exceptions */
250 static bool useshell
= false; /* use shell for subprocesses */
252 /* This vector maps GDB's idea of a register's number into an offset
253 in the windows exception context vector.
255 It also contains the bit mask needed to load the register in question.
257 The contents of this table can only be computed by the units
258 that provide CPU-specific support for Windows native debugging.
259 These units should set the table by calling
260 windows_set_context_register_offsets.
262 One day we could read a reg, we could inspect the context we
263 already have loaded, if it doesn't have the bit set that we need,
264 we read that set of registers in using GetThreadContext. If the
265 context already contains what we need, we just unpack it. Then to
266 write a register, first we have to ensure that the context contains
267 the other regs of the group, and then we copy the info in and set
270 static const int *mappings
;
272 /* The function to use in order to determine whether a register is
273 a segment register or not. */
274 static segment_register_p_ftype
*segment_register_p
;
276 /* See windows_nat_target::resume to understand why this is commented
279 /* This vector maps the target's idea of an exception (extracted
280 from the DEBUG_EVENT structure) to GDB's idea. */
282 struct xlate_exception
288 static const struct xlate_exception xlate
[] =
290 {EXCEPTION_ACCESS_VIOLATION
, GDB_SIGNAL_SEGV
},
291 {STATUS_STACK_OVERFLOW
, GDB_SIGNAL_SEGV
},
292 {EXCEPTION_BREAKPOINT
, GDB_SIGNAL_TRAP
},
293 {DBG_CONTROL_C
, GDB_SIGNAL_INT
},
294 {EXCEPTION_SINGLE_STEP
, GDB_SIGNAL_TRAP
},
295 {STATUS_FLOAT_DIVIDE_BY_ZERO
, GDB_SIGNAL_FPE
}
300 struct windows_nat_target final
: public x86_nat_target
<inf_child_target
>
302 void close () override
;
304 void attach (const char *, int) override
;
306 bool attach_no_wait () override
309 void detach (inferior
*, int) override
;
311 void resume (ptid_t
, int , enum gdb_signal
) override
;
313 ptid_t
wait (ptid_t
, struct target_waitstatus
*, int) override
;
315 void fetch_registers (struct regcache
*, int) override
;
316 void store_registers (struct regcache
*, int) override
;
318 bool stopped_by_sw_breakpoint () override
320 return current_windows_thread
->stopped_at_software_breakpoint
;
323 bool supports_stopped_by_sw_breakpoint () override
328 enum target_xfer_status
xfer_partial (enum target_object object
,
331 const gdb_byte
*writebuf
,
332 ULONGEST offset
, ULONGEST len
,
333 ULONGEST
*xfered_len
) override
;
335 void files_info () override
;
337 void kill () override
;
339 void create_inferior (const char *, const std::string
&,
340 char **, int) override
;
342 void mourn_inferior () override
;
344 bool thread_alive (ptid_t ptid
) override
;
346 std::string
pid_to_str (ptid_t
) override
;
348 void interrupt () override
;
350 char *pid_to_exec_file (int pid
) override
;
352 ptid_t
get_ada_task_ptid (long lwp
, long thread
) override
;
354 bool get_tib_address (ptid_t ptid
, CORE_ADDR
*addr
) override
;
356 const char *thread_name (struct thread_info
*) override
;
358 int get_windows_debug_event (int pid
, struct target_waitstatus
*ourstatus
);
361 static windows_nat_target the_windows_nat_target
;
363 /* Set the MAPPINGS static global to OFFSETS.
364 See the description of MAPPINGS for more details. */
367 windows_set_context_register_offsets (const int *offsets
)
372 /* Set the function that should be used by this module to determine
373 whether a given register is a segment register or not. */
376 windows_set_segment_register_p (segment_register_p_ftype
*fun
)
378 segment_register_p
= fun
;
382 check (BOOL ok
, const char *file
, int line
)
385 printf_filtered ("error return %s:%d was %u\n", file
, line
,
386 (unsigned) GetLastError ());
389 /* See nat/windows-nat.h. */
391 windows_thread_info
*
392 windows_nat::thread_rec (ptid_t ptid
, thread_disposition_type disposition
)
394 for (windows_thread_info
*th
: thread_list
)
395 if (th
->tid
== ptid
.lwp ())
401 case DONT_INVALIDATE_CONTEXT
:
404 case INVALIDATE_CONTEXT
:
405 if (ptid
.lwp () != current_event
.dwThreadId
)
407 th
->reload_context
= true;
410 th
->reload_context
= true;
421 /* Add a thread to the thread list.
423 PTID is the ptid of the thread to be added.
424 H is its Windows handle.
425 TLB is its thread local base.
426 MAIN_THREAD_P should be true if the thread to be added is
427 the main thread, false otherwise. */
429 static windows_thread_info
*
430 windows_add_thread (ptid_t ptid
, HANDLE h
, void *tlb
, bool main_thread_p
)
432 windows_thread_info
*th
;
434 gdb_assert (ptid
.lwp () != 0);
436 if ((th
= thread_rec (ptid
, DONT_INVALIDATE_CONTEXT
)))
439 CORE_ADDR base
= (CORE_ADDR
) (uintptr_t) tlb
;
441 /* For WOW64 processes, this is actually the pointer to the 64bit TIB,
442 and the 32bit TIB is exactly 2 pages after it. */
446 th
= new windows_thread_info (ptid
.lwp (), h
, base
);
447 thread_list
.push_back (th
);
449 /* Add this new thread to the list of threads.
451 To be consistent with what's done on other platforms, we add
452 the main thread silently (in reality, this thread is really
453 more of a process to the user than a thread). */
455 add_thread_silent (&the_windows_nat_target
, ptid
);
457 add_thread (&the_windows_nat_target
, ptid
);
459 /* Set the debug registers for the new thread if they are used. */
460 if (debug_registers_used
)
465 /* Only change the value of the debug registers. */
466 th
->wow64_context
.ContextFlags
= CONTEXT_DEBUG_REGISTERS
;
467 CHECK (Wow64GetThreadContext (th
->h
, &th
->wow64_context
));
468 th
->wow64_context
.Dr0
= dr
[0];
469 th
->wow64_context
.Dr1
= dr
[1];
470 th
->wow64_context
.Dr2
= dr
[2];
471 th
->wow64_context
.Dr3
= dr
[3];
472 th
->wow64_context
.Dr6
= DR6_CLEAR_VALUE
;
473 th
->wow64_context
.Dr7
= dr
[7];
474 CHECK (Wow64SetThreadContext (th
->h
, &th
->wow64_context
));
475 th
->wow64_context
.ContextFlags
= 0;
480 /* Only change the value of the debug registers. */
481 th
->context
.ContextFlags
= CONTEXT_DEBUG_REGISTERS
;
482 CHECK (GetThreadContext (th
->h
, &th
->context
));
483 th
->context
.Dr0
= dr
[0];
484 th
->context
.Dr1
= dr
[1];
485 th
->context
.Dr2
= dr
[2];
486 th
->context
.Dr3
= dr
[3];
487 th
->context
.Dr6
= DR6_CLEAR_VALUE
;
488 th
->context
.Dr7
= dr
[7];
489 CHECK (SetThreadContext (th
->h
, &th
->context
));
490 th
->context
.ContextFlags
= 0;
496 /* Clear out any old thread list and reinitialize it to a
499 windows_init_thread_list (void)
501 DEBUG_EVENTS (("gdb: windows_init_thread_list\n"));
504 for (windows_thread_info
*here
: thread_list
)
507 thread_list
.clear ();
510 /* Delete a thread from the list of threads.
512 PTID is the ptid of the thread to be deleted.
513 EXIT_CODE is the thread's exit code.
514 MAIN_THREAD_P should be true if the thread to be deleted is
515 the main thread, false otherwise. */
518 windows_delete_thread (ptid_t ptid
, DWORD exit_code
, bool main_thread_p
)
522 gdb_assert (ptid
.lwp () != 0);
526 /* Emit a notification about the thread being deleted.
528 Note that no notification was printed when the main thread
529 was created, and thus, unless in verbose mode, we should be
530 symmetrical, and avoid that notification for the main thread
534 printf_unfiltered ("[Deleting %s]\n", target_pid_to_str (ptid
).c_str ());
535 else if (print_thread_events
&& !main_thread_p
)
536 printf_unfiltered (_("[%s exited with code %u]\n"),
537 target_pid_to_str (ptid
).c_str (),
538 (unsigned) exit_code
);
540 delete_thread (find_thread_ptid (&the_windows_nat_target
, ptid
));
542 auto iter
= std::find_if (thread_list
.begin (), thread_list
.end (),
543 [=] (windows_thread_info
*th
)
545 return th
->tid
== id
;
548 if (iter
!= thread_list
.end ())
551 thread_list
.erase (iter
);
555 /* Fetches register number R from the given windows_thread_info,
556 and supplies its value to the given regcache.
558 This function assumes that R is non-negative. A failed assertion
559 is raised if that is not true.
561 This function assumes that TH->RELOAD_CONTEXT is not set, meaning
562 that the windows_thread_info has an up-to-date context. A failed
563 assertion is raised if that assumption is violated. */
566 windows_fetch_one_register (struct regcache
*regcache
,
567 windows_thread_info
*th
, int r
)
570 gdb_assert (!th
->reload_context
);
572 char *context_ptr
= (char *) &th
->context
;
575 context_ptr
= (char *) &th
->wow64_context
;
578 char *context_offset
= context_ptr
+ mappings
[r
];
579 struct gdbarch
*gdbarch
= regcache
->arch ();
580 struct gdbarch_tdep
*tdep
= gdbarch_tdep (gdbarch
);
582 gdb_assert (!gdbarch_read_pc_p (gdbarch
));
583 gdb_assert (gdbarch_pc_regnum (gdbarch
) >= 0);
584 gdb_assert (!gdbarch_write_pc_p (gdbarch
));
586 if (r
== I387_FISEG_REGNUM (tdep
))
588 long l
= *((long *) context_offset
) & 0xffff;
589 regcache
->raw_supply (r
, (char *) &l
);
591 else if (r
== I387_FOP_REGNUM (tdep
))
593 long l
= (*((long *) context_offset
) >> 16) & ((1 << 11) - 1);
594 regcache
->raw_supply (r
, (char *) &l
);
596 else if (segment_register_p (r
))
598 /* GDB treats segment registers as 32bit registers, but they are
599 in fact only 16 bits long. Make sure we do not read extra
600 bits from our source buffer. */
601 long l
= *((long *) context_offset
) & 0xffff;
602 regcache
->raw_supply (r
, (char *) &l
);
606 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
);
626 /* Make sure we only rewrite the PC a single time. */
627 th
->pc_adjusted
= true;
629 regcache
->raw_supply (r
, context_offset
);
634 windows_nat_target::fetch_registers (struct regcache
*regcache
, int r
)
636 windows_thread_info
*th
= thread_rec (regcache
->ptid (), INVALIDATE_CONTEXT
);
638 /* Check if TH exists. Windows sometimes uses a non-existent
639 thread id in its events. */
643 if (th
->reload_context
)
646 if (have_saved_context
)
648 /* Lie about where the program actually is stopped since
649 cygwin has informed us that we should consider the signal
650 to have occurred at another location which is stored in
652 memcpy (&th
->context
, &saved_context
,
653 __COPY_CONTEXT_SIZE
);
654 have_saved_context
= 0;
661 th
->wow64_context
.ContextFlags
= CONTEXT_DEBUGGER_DR
;
662 CHECK (Wow64GetThreadContext (th
->h
, &th
->wow64_context
));
663 /* Copy dr values from that thread.
664 But only if there were not modified since last stop.
666 if (!debug_registers_changed
)
668 dr
[0] = th
->wow64_context
.Dr0
;
669 dr
[1] = th
->wow64_context
.Dr1
;
670 dr
[2] = th
->wow64_context
.Dr2
;
671 dr
[3] = th
->wow64_context
.Dr3
;
672 dr
[6] = th
->wow64_context
.Dr6
;
673 dr
[7] = th
->wow64_context
.Dr7
;
679 th
->context
.ContextFlags
= CONTEXT_DEBUGGER_DR
;
680 CHECK (GetThreadContext (th
->h
, &th
->context
));
681 /* Copy dr values from that thread.
682 But only if there were not modified since last stop.
684 if (!debug_registers_changed
)
686 dr
[0] = th
->context
.Dr0
;
687 dr
[1] = th
->context
.Dr1
;
688 dr
[2] = th
->context
.Dr2
;
689 dr
[3] = th
->context
.Dr3
;
690 dr
[6] = th
->context
.Dr6
;
691 dr
[7] = th
->context
.Dr7
;
694 th
->reload_context
= false;
698 for (r
= 0; r
< gdbarch_num_regs (regcache
->arch()); r
++)
699 windows_fetch_one_register (regcache
, th
, r
);
701 windows_fetch_one_register (regcache
, th
, r
);
704 /* Collect the register number R from the given regcache, and store
705 its value into the corresponding area of the given thread's context.
707 This function assumes that R is non-negative. A failed assertion
708 assertion is raised if that is not true. */
711 windows_store_one_register (const struct regcache
*regcache
,
712 windows_thread_info
*th
, int r
)
716 char *context_ptr
= (char *) &th
->context
;
719 context_ptr
= (char *) &th
->wow64_context
;
722 regcache
->raw_collect (r
, context_ptr
+ mappings
[r
]);
725 /* Store a new register value into the context of the thread tied to
729 windows_nat_target::store_registers (struct regcache
*regcache
, int r
)
731 windows_thread_info
*th
= thread_rec (regcache
->ptid (), INVALIDATE_CONTEXT
);
733 /* Check if TH exists. Windows sometimes uses a non-existent
734 thread id in its events. */
739 for (r
= 0; r
< gdbarch_num_regs (regcache
->arch ()); r
++)
740 windows_store_one_register (regcache
, th
, r
);
742 windows_store_one_register (regcache
, th
, r
);
745 /* Maintain a linked list of "so" information. */
746 struct lm_info_windows
: public lm_info_base
748 LPVOID load_addr
= 0;
749 CORE_ADDR text_offset
= 0;
752 static struct so_list solib_start
, *solib_end
;
754 static struct so_list
*
755 windows_make_so (const char *name
, LPVOID load_addr
)
762 WIN32_FIND_DATA w32_fd
;
763 HANDLE h
= FindFirstFile(name
, &w32_fd
);
765 if (h
== INVALID_HANDLE_VALUE
)
771 if (GetCurrentDirectory (MAX_PATH
+ 1, cwd
))
773 p
= strrchr (buf
, '\\');
776 SetCurrentDirectory (buf
);
777 GetFullPathName (w32_fd
.cFileName
, MAX_PATH
, buf
, &p
);
778 SetCurrentDirectory (cwd
);
781 if (strcasecmp (buf
, "ntdll.dll") == 0)
783 GetSystemDirectory (buf
, sizeof (buf
));
784 strcat (buf
, "\\ntdll.dll");
787 cygwin_buf_t buf
[__PMAX
];
790 if (access (name
, F_OK
) != 0)
792 if (strcasecmp (name
, "ntdll.dll") == 0)
795 GetSystemDirectoryW (buf
, sizeof (buf
) / sizeof (wchar_t));
796 wcscat (buf
, L
"\\ntdll.dll");
800 GetSystemDirectoryA (buf
, sizeof (buf
) / sizeof (wchar_t));
801 strcat (buf
, "\\ntdll.dll");
806 so
= XCNEW (struct so_list
);
807 lm_info_windows
*li
= new lm_info_windows
;
809 li
->load_addr
= load_addr
;
810 strcpy (so
->so_original_name
, name
);
812 strcpy (so
->so_name
, buf
);
815 cygwin_conv_path (CCP_WIN_W_TO_POSIX
, buf
, so
->so_name
,
816 SO_NAME_MAX_PATH_SIZE
);
819 char *rname
= realpath (name
, NULL
);
820 if (rname
&& strlen (rname
) < SO_NAME_MAX_PATH_SIZE
)
822 strcpy (so
->so_name
, rname
);
827 warning (_("dll path for \"%s\" too long or inaccessible"), name
);
828 strcpy (so
->so_name
, so
->so_original_name
);
831 /* Record cygwin1.dll .text start/end. */
832 p
= strchr (so
->so_name
, '\0') - (sizeof ("/cygwin1.dll") - 1);
833 if (p
>= so
->so_name
&& strcasecmp (p
, "/cygwin1.dll") == 0)
835 asection
*text
= NULL
;
837 gdb_bfd_ref_ptr
abfd (gdb_bfd_open (so
->so_name
, "pei-i386"));
842 if (bfd_check_format (abfd
.get (), bfd_object
))
843 text
= bfd_get_section_by_name (abfd
.get (), ".text");
848 /* The symbols in a dll are offset by 0x1000, which is the
849 offset from 0 of the first byte in an image - because of the
850 file header and the section alignment. */
851 cygwin_load_start
= (CORE_ADDR
) (uintptr_t) ((char *)
853 cygwin_load_end
= cygwin_load_start
+ bfd_section_size (text
);
860 /* See nat/windows-nat.h. */
863 windows_nat::handle_load_dll ()
865 LOAD_DLL_DEBUG_INFO
*event
= ¤t_event
.u
.LoadDll
;
866 const char *dll_name
;
868 /* Try getting the DLL name via the lpImageName field of the event.
869 Note that Microsoft documents this fields as strictly optional,
870 in the sense that it might be NULL. And the first DLL event in
871 particular is explicitly documented as "likely not pass[ed]"
872 (source: MSDN LOAD_DLL_DEBUG_INFO structure). */
873 dll_name
= get_image_name (current_process_handle
,
874 event
->lpImageName
, event
->fUnicode
);
878 solib_end
->next
= windows_make_so (dll_name
, event
->lpBaseOfDll
);
879 solib_end
= solib_end
->next
;
881 lm_info_windows
*li
= (lm_info_windows
*) solib_end
->lm_info
;
883 DEBUG_EVENTS (("gdb: Loading dll \"%s\" at %s.\n", solib_end
->so_name
,
884 host_address_to_string (li
->load_addr
)));
888 windows_free_so (struct so_list
*so
)
890 lm_info_windows
*li
= (lm_info_windows
*) so
->lm_info
;
896 /* See nat/windows-nat.h. */
899 windows_nat::handle_unload_dll ()
901 LPVOID lpBaseOfDll
= current_event
.u
.UnloadDll
.lpBaseOfDll
;
904 for (so
= &solib_start
; so
->next
!= NULL
; so
= so
->next
)
906 lm_info_windows
*li_next
= (lm_info_windows
*) so
->next
->lm_info
;
908 if (li_next
->load_addr
== lpBaseOfDll
)
910 struct so_list
*sodel
= so
->next
;
912 so
->next
= sodel
->next
;
915 DEBUG_EVENTS (("gdb: Unloading dll \"%s\".\n", sodel
->so_name
));
917 windows_free_so (sodel
);
922 /* We did not find any DLL that was previously loaded at this address,
923 so register a complaint. We do not report an error, because we have
924 observed that this may be happening under some circumstances. For
925 instance, running 32bit applications on x64 Windows causes us to receive
926 4 mysterious UNLOAD_DLL_DEBUG_EVENTs during the startup phase (these
927 events are apparently caused by the WOW layer, the interface between
928 32bit and 64bit worlds). */
929 complaint (_("dll starting at %s not found."),
930 host_address_to_string (lpBaseOfDll
));
933 /* Call FUNC wrapped in a TRY/CATCH that swallows all GDB
937 catch_errors (void (*func
) ())
943 catch (const gdb_exception
&ex
)
945 exception_print (gdb_stderr
, ex
);
949 /* Clear list of loaded DLLs. */
951 windows_clear_solib (void)
955 for (so
= solib_start
.next
; so
; so
= solib_start
.next
)
957 solib_start
.next
= so
->next
;
958 windows_free_so (so
);
961 solib_end
= &solib_start
;
965 signal_event_command (const char *args
, int from_tty
)
967 uintptr_t event_id
= 0;
968 char *endargs
= NULL
;
971 error (_("signal-event requires an argument (integer event id)"));
973 event_id
= strtoumax (args
, &endargs
, 10);
975 if ((errno
== ERANGE
) || (event_id
== 0) || (event_id
> UINTPTR_MAX
) ||
976 ((HANDLE
) event_id
== INVALID_HANDLE_VALUE
))
977 error (_("Failed to convert `%s' to event id"), args
);
979 SetEvent ((HANDLE
) event_id
);
980 CloseHandle ((HANDLE
) event_id
);
983 /* See nat/windows-nat.h. */
986 windows_nat::handle_output_debug_string (struct target_waitstatus
*ourstatus
)
990 gdb::unique_xmalloc_ptr
<char> s
991 = (target_read_string
992 ((CORE_ADDR
) (uintptr_t) current_event
.u
.DebugString
.lpDebugStringData
,
994 if (s
== nullptr || !*(s
.get ()))
996 else if (!startswith (s
.get (), _CYGWIN_SIGNAL_STRING
))
999 if (!startswith (s
.get (), "cYg"))
1002 char *p
= strchr (s
.get (), '\0');
1004 if (p
> s
.get () && *--p
== '\n')
1006 warning (("%s"), s
.get ());
1012 /* Got a cygwin signal marker. A cygwin signal is followed by
1013 the signal number itself and then optionally followed by the
1014 thread id and address to saved context within the DLL. If
1015 these are supplied, then the given thread is assumed to have
1016 issued the signal and the context from the thread is assumed
1017 to be stored at the given address in the inferior. Tell gdb
1018 to treat this like a real signal. */
1020 int sig
= strtol (s
.get () + sizeof (_CYGWIN_SIGNAL_STRING
) - 1, &p
, 0);
1021 gdb_signal gotasig
= gdb_signal_from_host (sig
);
1023 ourstatus
->value
.sig
= gotasig
;
1029 ourstatus
->kind
= TARGET_WAITKIND_STOPPED
;
1030 retval
= strtoul (p
, &p
, 0);
1032 retval
= current_event
.dwThreadId
;
1033 else if ((x
= (LPCVOID
) (uintptr_t) strtoull (p
, NULL
, 0))
1034 && ReadProcessMemory (current_process_handle
, x
,
1036 __COPY_CONTEXT_SIZE
, &n
)
1037 && n
== __COPY_CONTEXT_SIZE
)
1038 have_saved_context
= 1;
1047 display_selector (HANDLE thread
, DWORD sel
)
1053 ret
= Wow64GetThreadSelectorEntry (thread
, sel
, &info
);
1056 ret
= GetThreadSelectorEntry (thread
, sel
, &info
);
1060 printf_filtered ("0x%03x: ", (unsigned) sel
);
1061 if (!info
.HighWord
.Bits
.Pres
)
1063 puts_filtered ("Segment not present\n");
1066 base
= (info
.HighWord
.Bits
.BaseHi
<< 24) +
1067 (info
.HighWord
.Bits
.BaseMid
<< 16)
1069 limit
= (info
.HighWord
.Bits
.LimitHi
<< 16) + info
.LimitLow
;
1070 if (info
.HighWord
.Bits
.Granularity
)
1071 limit
= (limit
<< 12) | 0xfff;
1072 printf_filtered ("base=0x%08x limit=0x%08x", base
, limit
);
1073 if (info
.HighWord
.Bits
.Default_Big
)
1074 puts_filtered(" 32-bit ");
1076 puts_filtered(" 16-bit ");
1077 switch ((info
.HighWord
.Bits
.Type
& 0xf) >> 1)
1080 puts_filtered ("Data (Read-Only, Exp-up");
1083 puts_filtered ("Data (Read/Write, Exp-up");
1086 puts_filtered ("Unused segment (");
1089 puts_filtered ("Data (Read/Write, Exp-down");
1092 puts_filtered ("Code (Exec-Only, N.Conf");
1095 puts_filtered ("Code (Exec/Read, N.Conf");
1098 puts_filtered ("Code (Exec-Only, Conf");
1101 puts_filtered ("Code (Exec/Read, Conf");
1104 printf_filtered ("Unknown type 0x%lx",
1105 (unsigned long) info
.HighWord
.Bits
.Type
);
1107 if ((info
.HighWord
.Bits
.Type
& 0x1) == 0)
1108 puts_filtered(", N.Acc");
1109 puts_filtered (")\n");
1110 if ((info
.HighWord
.Bits
.Type
& 0x10) == 0)
1111 puts_filtered("System selector ");
1112 printf_filtered ("Priviledge level = %ld. ",
1113 (unsigned long) info
.HighWord
.Bits
.Dpl
);
1114 if (info
.HighWord
.Bits
.Granularity
)
1115 puts_filtered ("Page granular.\n");
1117 puts_filtered ("Byte granular.\n");
1122 DWORD err
= GetLastError ();
1123 if (err
== ERROR_NOT_SUPPORTED
)
1124 printf_filtered ("Function not supported\n");
1126 printf_filtered ("Invalid selector 0x%x.\n", (unsigned) sel
);
1132 display_selectors (const char * args
, int from_tty
)
1134 if (!current_windows_thread
)
1136 puts_filtered ("Impossible to display selectors now.\n");
1144 puts_filtered ("Selector $cs\n");
1145 display_selector (current_windows_thread
->h
,
1146 current_windows_thread
->wow64_context
.SegCs
);
1147 puts_filtered ("Selector $ds\n");
1148 display_selector (current_windows_thread
->h
,
1149 current_windows_thread
->wow64_context
.SegDs
);
1150 puts_filtered ("Selector $es\n");
1151 display_selector (current_windows_thread
->h
,
1152 current_windows_thread
->wow64_context
.SegEs
);
1153 puts_filtered ("Selector $ss\n");
1154 display_selector (current_windows_thread
->h
,
1155 current_windows_thread
->wow64_context
.SegSs
);
1156 puts_filtered ("Selector $fs\n");
1157 display_selector (current_windows_thread
->h
,
1158 current_windows_thread
->wow64_context
.SegFs
);
1159 puts_filtered ("Selector $gs\n");
1160 display_selector (current_windows_thread
->h
,
1161 current_windows_thread
->wow64_context
.SegGs
);
1166 puts_filtered ("Selector $cs\n");
1167 display_selector (current_windows_thread
->h
,
1168 current_windows_thread
->context
.SegCs
);
1169 puts_filtered ("Selector $ds\n");
1170 display_selector (current_windows_thread
->h
,
1171 current_windows_thread
->context
.SegDs
);
1172 puts_filtered ("Selector $es\n");
1173 display_selector (current_windows_thread
->h
,
1174 current_windows_thread
->context
.SegEs
);
1175 puts_filtered ("Selector $ss\n");
1176 display_selector (current_windows_thread
->h
,
1177 current_windows_thread
->context
.SegSs
);
1178 puts_filtered ("Selector $fs\n");
1179 display_selector (current_windows_thread
->h
,
1180 current_windows_thread
->context
.SegFs
);
1181 puts_filtered ("Selector $gs\n");
1182 display_selector (current_windows_thread
->h
,
1183 current_windows_thread
->context
.SegGs
);
1189 sel
= parse_and_eval_long (args
);
1190 printf_filtered ("Selector \"%s\"\n",args
);
1191 display_selector (current_windows_thread
->h
, sel
);
1195 /* See nat/windows-nat.h. */
1198 windows_nat::handle_ms_vc_exception (const EXCEPTION_RECORD
*rec
)
1200 if (rec
->NumberParameters
>= 3
1201 && (rec
->ExceptionInformation
[0] & 0xffffffff) == 0x1000)
1203 DWORD named_thread_id
;
1204 windows_thread_info
*named_thread
;
1205 CORE_ADDR thread_name_target
;
1207 thread_name_target
= rec
->ExceptionInformation
[1];
1208 named_thread_id
= (DWORD
) (0xffffffff & rec
->ExceptionInformation
[2]);
1210 if (named_thread_id
== (DWORD
) -1)
1211 named_thread_id
= current_event
.dwThreadId
;
1213 named_thread
= thread_rec (ptid_t (current_event
.dwProcessId
,
1214 named_thread_id
, 0),
1215 DONT_INVALIDATE_CONTEXT
);
1216 if (named_thread
!= NULL
)
1218 int thread_name_len
;
1219 gdb::unique_xmalloc_ptr
<char> thread_name
1220 = target_read_string (thread_name_target
, 1025, &thread_name_len
);
1221 if (thread_name_len
> 0)
1223 thread_name
.get ()[thread_name_len
- 1] = '\0';
1224 named_thread
->name
= std::move (thread_name
);
1234 /* See nat/windows-nat.h. */
1237 windows_nat::handle_access_violation (const EXCEPTION_RECORD
*rec
)
1240 /* See if the access violation happened within the cygwin DLL
1241 itself. Cygwin uses a kind of exception handling to deal with
1242 passed-in invalid addresses. gdb should not treat these as real
1243 SEGVs since they will be silently handled by cygwin. A real SEGV
1244 will (theoretically) be caught by cygwin later in the process and
1245 will be sent as a cygwin-specific-signal. So, ignore SEGVs if
1246 they show up within the text segment of the DLL itself. */
1248 CORE_ADDR addr
= (CORE_ADDR
) (uintptr_t) rec
->ExceptionAddress
;
1250 if ((!cygwin_exceptions
&& (addr
>= cygwin_load_start
1251 && addr
< cygwin_load_end
))
1252 || (find_pc_partial_function (addr
, &fn
, NULL
, NULL
)
1253 && startswith (fn
, "KERNEL32!IsBad")))
1259 /* Resume thread specified by ID, or all artificially suspended
1260 threads, if we are continuing execution. KILLED non-zero means we
1261 have killed the inferior, so we should ignore weird errors due to
1262 threads shutting down. */
1264 windows_continue (DWORD continue_status
, int id
, int killed
)
1268 desired_stop_thread_id
= id
;
1270 if (matching_pending_stop (debug_events
))
1273 for (windows_thread_info
*th
: thread_list
)
1274 if (id
== -1 || id
== (int) th
->tid
)
1281 if (debug_registers_changed
)
1283 th
->wow64_context
.ContextFlags
|= CONTEXT_DEBUG_REGISTERS
;
1284 th
->wow64_context
.Dr0
= dr
[0];
1285 th
->wow64_context
.Dr1
= dr
[1];
1286 th
->wow64_context
.Dr2
= dr
[2];
1287 th
->wow64_context
.Dr3
= dr
[3];
1288 th
->wow64_context
.Dr6
= DR6_CLEAR_VALUE
;
1289 th
->wow64_context
.Dr7
= dr
[7];
1291 if (th
->wow64_context
.ContextFlags
)
1295 if (GetExitCodeThread (th
->h
, &ec
)
1296 && ec
== STILL_ACTIVE
)
1298 BOOL status
= Wow64SetThreadContext (th
->h
,
1299 &th
->wow64_context
);
1304 th
->wow64_context
.ContextFlags
= 0;
1310 if (debug_registers_changed
)
1312 th
->context
.ContextFlags
|= CONTEXT_DEBUG_REGISTERS
;
1313 th
->context
.Dr0
= dr
[0];
1314 th
->context
.Dr1
= dr
[1];
1315 th
->context
.Dr2
= dr
[2];
1316 th
->context
.Dr3
= dr
[3];
1317 th
->context
.Dr6
= DR6_CLEAR_VALUE
;
1318 th
->context
.Dr7
= dr
[7];
1320 if (th
->context
.ContextFlags
)
1324 if (GetExitCodeThread (th
->h
, &ec
)
1325 && ec
== STILL_ACTIVE
)
1327 BOOL status
= SetThreadContext (th
->h
, &th
->context
);
1332 th
->context
.ContextFlags
= 0;
1339 /* When single-stepping a specific thread, other threads must
1344 res
= continue_last_debug_event (continue_status
, debug_events
);
1347 error (_("Failed to resume program execution"
1348 " (ContinueDebugEvent failed, error %u)"),
1349 (unsigned int) GetLastError ());
1351 debug_registers_changed
= 0;
1355 /* Called in pathological case where Windows fails to send a
1356 CREATE_PROCESS_DEBUG_EVENT after an attach. */
1358 fake_create_process (void)
1360 current_process_handle
= OpenProcess (PROCESS_ALL_ACCESS
, FALSE
,
1361 current_event
.dwProcessId
);
1362 if (current_process_handle
!= NULL
)
1363 open_process_used
= 1;
1366 error (_("OpenProcess call failed, GetLastError = %u"),
1367 (unsigned) GetLastError ());
1368 /* We can not debug anything in that case. */
1370 current_windows_thread
1371 = windows_add_thread (ptid_t (current_event
.dwProcessId
,
1372 current_event
.dwThreadId
, 0),
1373 current_event
.u
.CreateThread
.hThread
,
1374 current_event
.u
.CreateThread
.lpThreadLocalBase
,
1375 true /* main_thread_p */);
1376 return current_event
.dwThreadId
;
1380 windows_nat_target::resume (ptid_t ptid
, int step
, enum gdb_signal sig
)
1382 windows_thread_info
*th
;
1383 DWORD continue_status
= DBG_CONTINUE
;
1385 /* A specific PTID means `step only this thread id'. */
1386 int resume_all
= ptid
== minus_one_ptid
;
1388 /* If we're continuing all threads, it's the current inferior that
1389 should be handled specially. */
1391 ptid
= inferior_ptid
;
1393 if (sig
!= GDB_SIGNAL_0
)
1395 if (current_event
.dwDebugEventCode
!= EXCEPTION_DEBUG_EVENT
)
1397 DEBUG_EXCEPT(("Cannot continue with signal %d here.\n",sig
));
1399 else if (sig
== last_sig
)
1400 continue_status
= DBG_EXCEPTION_NOT_HANDLED
;
1403 /* This code does not seem to work, because
1404 the kernel does probably not consider changes in the ExceptionRecord
1405 structure when passing the exception to the inferior.
1406 Note that this seems possible in the exception handler itself. */
1408 for (const xlate_exception
&x
: xlate
)
1411 current_event
.u
.Exception
.ExceptionRecord
.ExceptionCode
1413 continue_status
= DBG_EXCEPTION_NOT_HANDLED
;
1416 if (continue_status
== DBG_CONTINUE
)
1418 DEBUG_EXCEPT(("Cannot continue with signal %d.\n",sig
));
1422 DEBUG_EXCEPT(("Can only continue with received signal %d.\n",
1426 last_sig
= GDB_SIGNAL_0
;
1428 DEBUG_EXEC (("gdb: windows_resume (pid=%d, tid=0x%x, step=%d, sig=%d);\n",
1429 ptid
.pid (), (unsigned) ptid
.lwp (), step
, sig
));
1431 /* Get context for currently selected thread. */
1432 th
= thread_rec (inferior_ptid
, DONT_INVALIDATE_CONTEXT
);
1440 /* Single step by setting t bit. */
1441 struct regcache
*regcache
= get_current_regcache ();
1442 struct gdbarch
*gdbarch
= regcache
->arch ();
1443 fetch_registers (regcache
, gdbarch_ps_regnum (gdbarch
));
1444 th
->wow64_context
.EFlags
|= FLAG_TRACE_BIT
;
1447 if (th
->wow64_context
.ContextFlags
)
1449 if (debug_registers_changed
)
1451 th
->wow64_context
.Dr0
= dr
[0];
1452 th
->wow64_context
.Dr1
= dr
[1];
1453 th
->wow64_context
.Dr2
= dr
[2];
1454 th
->wow64_context
.Dr3
= dr
[3];
1455 th
->wow64_context
.Dr6
= DR6_CLEAR_VALUE
;
1456 th
->wow64_context
.Dr7
= dr
[7];
1458 CHECK (Wow64SetThreadContext (th
->h
, &th
->wow64_context
));
1459 th
->wow64_context
.ContextFlags
= 0;
1467 /* Single step by setting t bit. */
1468 struct regcache
*regcache
= get_current_regcache ();
1469 struct gdbarch
*gdbarch
= regcache
->arch ();
1470 fetch_registers (regcache
, gdbarch_ps_regnum (gdbarch
));
1471 th
->context
.EFlags
|= FLAG_TRACE_BIT
;
1474 if (th
->context
.ContextFlags
)
1476 if (debug_registers_changed
)
1478 th
->context
.Dr0
= dr
[0];
1479 th
->context
.Dr1
= dr
[1];
1480 th
->context
.Dr2
= dr
[2];
1481 th
->context
.Dr3
= dr
[3];
1482 th
->context
.Dr6
= DR6_CLEAR_VALUE
;
1483 th
->context
.Dr7
= dr
[7];
1485 CHECK (SetThreadContext (th
->h
, &th
->context
));
1486 th
->context
.ContextFlags
= 0;
1491 /* Allow continuing with the same signal that interrupted us.
1492 Otherwise complain. */
1495 windows_continue (continue_status
, -1, 0);
1497 windows_continue (continue_status
, ptid
.lwp (), 0);
1500 /* Ctrl-C handler used when the inferior is not run in the same console. The
1501 handler is in charge of interrupting the inferior using DebugBreakProcess.
1502 Note that this function is not available prior to Windows XP. In this case
1503 we emit a warning. */
1505 ctrl_c_handler (DWORD event_type
)
1507 const int attach_flag
= current_inferior ()->attach_flag
;
1509 /* Only handle Ctrl-C and Ctrl-Break events. Ignore others. */
1510 if (event_type
!= CTRL_C_EVENT
&& event_type
!= CTRL_BREAK_EVENT
)
1513 /* If the inferior and the debugger share the same console, do nothing as
1514 the inferior has also received the Ctrl-C event. */
1515 if (!new_console
&& !attach_flag
)
1518 if (!DebugBreakProcess (current_process_handle
))
1519 warning (_("Could not interrupt program. "
1520 "Press Ctrl-c in the program console."));
1522 /* Return true to tell that Ctrl-C has been handled. */
1526 /* Get the next event from the child. Returns a non-zero thread id if the event
1527 requires handling by WFI (or whatever). */
1530 windows_nat_target::get_windows_debug_event (int pid
,
1531 struct target_waitstatus
*ourstatus
)
1534 DWORD continue_status
, event_code
;
1535 windows_thread_info
*th
;
1536 static windows_thread_info
dummy_thread_info (0, 0, 0);
1537 DWORD thread_id
= 0;
1539 /* If there is a relevant pending stop, report it now. See the
1540 comment by the definition of "pending_stops" for details on why
1542 gdb::optional
<pending_stop
> stop
= fetch_pending_stop (debug_events
);
1543 if (stop
.has_value ())
1545 thread_id
= stop
->thread_id
;
1546 *ourstatus
= stop
->status
;
1548 inferior_ptid
= ptid_t (current_event
.dwProcessId
, thread_id
, 0);
1549 current_windows_thread
= thread_rec (inferior_ptid
,
1550 INVALIDATE_CONTEXT
);
1551 current_windows_thread
->reload_context
= 1;
1556 last_sig
= GDB_SIGNAL_0
;
1558 if (!(debug_event
= wait_for_debug_event (¤t_event
, 1000)))
1561 continue_status
= DBG_CONTINUE
;
1563 event_code
= current_event
.dwDebugEventCode
;
1564 ourstatus
->kind
= TARGET_WAITKIND_SPURIOUS
;
1566 have_saved_context
= 0;
1570 case CREATE_THREAD_DEBUG_EVENT
:
1571 DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=0x%x code=%s)\n",
1572 (unsigned) current_event
.dwProcessId
,
1573 (unsigned) current_event
.dwThreadId
,
1574 "CREATE_THREAD_DEBUG_EVENT"));
1575 if (saw_create
!= 1)
1577 inferior
*inf
= find_inferior_pid (this, current_event
.dwProcessId
);
1578 if (!saw_create
&& inf
->attach_flag
)
1580 /* Kludge around a Windows bug where first event is a create
1581 thread event. Caused when attached process does not have
1583 thread_id
= fake_create_process ();
1589 /* Record the existence of this thread. */
1590 thread_id
= current_event
.dwThreadId
;
1591 th
= windows_add_thread
1592 (ptid_t (current_event
.dwProcessId
, current_event
.dwThreadId
, 0),
1593 current_event
.u
.CreateThread
.hThread
,
1594 current_event
.u
.CreateThread
.lpThreadLocalBase
,
1595 false /* main_thread_p */);
1599 case EXIT_THREAD_DEBUG_EVENT
:
1600 DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=0x%x code=%s)\n",
1601 (unsigned) current_event
.dwProcessId
,
1602 (unsigned) current_event
.dwThreadId
,
1603 "EXIT_THREAD_DEBUG_EVENT"));
1604 windows_delete_thread (ptid_t (current_event
.dwProcessId
,
1605 current_event
.dwThreadId
, 0),
1606 current_event
.u
.ExitThread
.dwExitCode
,
1607 false /* main_thread_p */);
1608 th
= &dummy_thread_info
;
1611 case CREATE_PROCESS_DEBUG_EVENT
:
1612 DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=0x%x code=%s)\n",
1613 (unsigned) current_event
.dwProcessId
,
1614 (unsigned) current_event
.dwThreadId
,
1615 "CREATE_PROCESS_DEBUG_EVENT"));
1616 CloseHandle (current_event
.u
.CreateProcessInfo
.hFile
);
1617 if (++saw_create
!= 1)
1620 current_process_handle
= current_event
.u
.CreateProcessInfo
.hProcess
;
1621 /* Add the main thread. */
1622 th
= windows_add_thread
1623 (ptid_t (current_event
.dwProcessId
,
1624 current_event
.dwThreadId
, 0),
1625 current_event
.u
.CreateProcessInfo
.hThread
,
1626 current_event
.u
.CreateProcessInfo
.lpThreadLocalBase
,
1627 true /* main_thread_p */);
1628 thread_id
= current_event
.dwThreadId
;
1631 case EXIT_PROCESS_DEBUG_EVENT
:
1632 DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=0x%x code=%s)\n",
1633 (unsigned) current_event
.dwProcessId
,
1634 (unsigned) current_event
.dwThreadId
,
1635 "EXIT_PROCESS_DEBUG_EVENT"));
1636 if (!windows_initialization_done
)
1638 target_terminal::ours ();
1639 target_mourn_inferior (inferior_ptid
);
1640 error (_("During startup program exited with code 0x%x."),
1641 (unsigned int) current_event
.u
.ExitProcess
.dwExitCode
);
1643 else if (saw_create
== 1)
1645 windows_delete_thread (ptid_t (current_event
.dwProcessId
,
1646 current_event
.dwThreadId
, 0),
1647 0, true /* main_thread_p */);
1648 DWORD exit_status
= current_event
.u
.ExitProcess
.dwExitCode
;
1649 /* If the exit status looks like a fatal exception, but we
1650 don't recognize the exception's code, make the original
1651 exit status value available, to avoid losing
1654 = WIFSIGNALED (exit_status
) ? WTERMSIG (exit_status
) : -1;
1655 if (exit_signal
== -1)
1657 ourstatus
->kind
= TARGET_WAITKIND_EXITED
;
1658 ourstatus
->value
.integer
= exit_status
;
1662 ourstatus
->kind
= TARGET_WAITKIND_SIGNALLED
;
1663 ourstatus
->value
.sig
= gdb_signal_from_host (exit_signal
);
1665 thread_id
= current_event
.dwThreadId
;
1669 case LOAD_DLL_DEBUG_EVENT
:
1670 DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=0x%x code=%s)\n",
1671 (unsigned) current_event
.dwProcessId
,
1672 (unsigned) current_event
.dwThreadId
,
1673 "LOAD_DLL_DEBUG_EVENT"));
1674 CloseHandle (current_event
.u
.LoadDll
.hFile
);
1675 if (saw_create
!= 1 || ! windows_initialization_done
)
1677 catch_errors (handle_load_dll
);
1678 ourstatus
->kind
= TARGET_WAITKIND_LOADED
;
1679 ourstatus
->value
.integer
= 0;
1680 thread_id
= current_event
.dwThreadId
;
1683 case UNLOAD_DLL_DEBUG_EVENT
:
1684 DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=0x%x code=%s)\n",
1685 (unsigned) current_event
.dwProcessId
,
1686 (unsigned) current_event
.dwThreadId
,
1687 "UNLOAD_DLL_DEBUG_EVENT"));
1688 if (saw_create
!= 1 || ! windows_initialization_done
)
1690 catch_errors (handle_unload_dll
);
1691 ourstatus
->kind
= TARGET_WAITKIND_LOADED
;
1692 ourstatus
->value
.integer
= 0;
1693 thread_id
= current_event
.dwThreadId
;
1696 case EXCEPTION_DEBUG_EVENT
:
1697 DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=0x%x code=%s)\n",
1698 (unsigned) current_event
.dwProcessId
,
1699 (unsigned) current_event
.dwThreadId
,
1700 "EXCEPTION_DEBUG_EVENT"));
1701 if (saw_create
!= 1)
1703 switch (handle_exception (ourstatus
, debug_exceptions
))
1705 case HANDLE_EXCEPTION_UNHANDLED
:
1707 continue_status
= DBG_EXCEPTION_NOT_HANDLED
;
1709 case HANDLE_EXCEPTION_HANDLED
:
1710 thread_id
= current_event
.dwThreadId
;
1712 case HANDLE_EXCEPTION_IGNORED
:
1713 continue_status
= DBG_CONTINUE
;
1718 case OUTPUT_DEBUG_STRING_EVENT
: /* Message from the kernel. */
1719 DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=0x%x code=%s)\n",
1720 (unsigned) current_event
.dwProcessId
,
1721 (unsigned) current_event
.dwThreadId
,
1722 "OUTPUT_DEBUG_STRING_EVENT"));
1723 if (saw_create
!= 1)
1725 thread_id
= handle_output_debug_string (ourstatus
);
1729 if (saw_create
!= 1)
1731 printf_unfiltered ("gdb: kernel event for pid=%u tid=0x%x\n",
1732 (unsigned) current_event
.dwProcessId
,
1733 (unsigned) current_event
.dwThreadId
);
1734 printf_unfiltered (" unknown event code %u\n",
1735 (unsigned) current_event
.dwDebugEventCode
);
1739 if (!thread_id
|| saw_create
!= 1)
1741 CHECK (windows_continue (continue_status
, desired_stop_thread_id
, 0));
1743 else if (desired_stop_thread_id
!= -1 && desired_stop_thread_id
!= thread_id
)
1745 /* Pending stop. See the comment by the definition of
1746 "pending_stops" for details on why this is needed. */
1747 DEBUG_EVENTS (("get_windows_debug_event - "
1748 "unexpected stop in 0x%x (expecting 0x%x)\n",
1749 thread_id
, desired_stop_thread_id
));
1751 if (current_event
.dwDebugEventCode
== EXCEPTION_DEBUG_EVENT
1752 && ((current_event
.u
.Exception
.ExceptionRecord
.ExceptionCode
1753 == EXCEPTION_BREAKPOINT
)
1754 || (current_event
.u
.Exception
.ExceptionRecord
.ExceptionCode
1755 == STATUS_WX86_BREAKPOINT
))
1756 && windows_initialization_done
)
1758 ptid_t ptid
= ptid_t (current_event
.dwProcessId
, thread_id
, 0);
1759 th
= thread_rec (ptid
, INVALIDATE_CONTEXT
);
1760 th
->stopped_at_software_breakpoint
= true;
1761 th
->pc_adjusted
= false;
1763 pending_stops
.push_back ({thread_id
, *ourstatus
, current_event
});
1765 CHECK (windows_continue (continue_status
, desired_stop_thread_id
, 0));
1769 inferior_ptid
= ptid_t (current_event
.dwProcessId
, thread_id
, 0);
1770 current_windows_thread
= th
;
1771 if (!current_windows_thread
)
1772 current_windows_thread
= thread_rec (inferior_ptid
,
1773 INVALIDATE_CONTEXT
);
1780 /* Wait for interesting events to occur in the target process. */
1782 windows_nat_target::wait (ptid_t ptid
, struct target_waitstatus
*ourstatus
,
1787 /* We loop when we get a non-standard exception rather than return
1788 with a SPURIOUS because resume can try and step or modify things,
1789 which needs a current_thread->h. But some of these exceptions mark
1790 the birth or death of threads, which mean that the current thread
1791 isn't necessarily what you think it is. */
1797 /* If the user presses Ctrl-c while the debugger is waiting
1798 for an event, he expects the debugger to interrupt his program
1799 and to get the prompt back. There are two possible situations:
1801 - The debugger and the program do not share the console, in
1802 which case the Ctrl-c event only reached the debugger.
1803 In that case, the ctrl_c handler will take care of interrupting
1804 the inferior. Note that this case is working starting with
1805 Windows XP. For Windows 2000, Ctrl-C should be pressed in the
1808 - The debugger and the program share the same console, in which
1809 case both debugger and inferior will receive the Ctrl-c event.
1810 In that case the ctrl_c handler will ignore the event, as the
1811 Ctrl-c event generated inside the inferior will trigger the
1812 expected debug event.
1814 FIXME: brobecker/2008-05-20: If the inferior receives the
1815 signal first and the delay until GDB receives that signal
1816 is sufficiently long, GDB can sometimes receive the SIGINT
1817 after we have unblocked the CTRL+C handler. This would
1818 lead to the debugger stopping prematurely while handling
1819 the new-thread event that comes with the handling of the SIGINT
1820 inside the inferior, and then stop again immediately when
1821 the user tries to resume the execution in the inferior.
1822 This is a classic race that we should try to fix one day. */
1823 SetConsoleCtrlHandler (&ctrl_c_handler
, TRUE
);
1824 retval
= get_windows_debug_event (pid
, ourstatus
);
1825 SetConsoleCtrlHandler (&ctrl_c_handler
, FALSE
);
1829 ptid_t result
= ptid_t (current_event
.dwProcessId
, retval
, 0);
1831 if (current_windows_thread
!= nullptr)
1833 current_windows_thread
->stopped_at_software_breakpoint
= false;
1834 if (current_event
.dwDebugEventCode
== EXCEPTION_DEBUG_EVENT
1835 && ((current_event
.u
.Exception
.ExceptionRecord
.ExceptionCode
1836 == EXCEPTION_BREAKPOINT
)
1837 || (current_event
.u
.Exception
.ExceptionRecord
.ExceptionCode
1838 == STATUS_WX86_BREAKPOINT
))
1839 && windows_initialization_done
)
1841 current_windows_thread
->stopped_at_software_breakpoint
1843 current_windows_thread
->pc_adjusted
= false;
1853 if (deprecated_ui_loop_hook
!= NULL
)
1854 detach
= deprecated_ui_loop_hook (0);
1862 /* Iterate over all DLLs currently mapped by our inferior, and
1863 add them to our list of solibs. */
1866 windows_add_all_dlls (void)
1868 HMODULE dummy_hmodule
;
1876 if (EnumProcessModulesEx (current_process_handle
, &dummy_hmodule
,
1877 sizeof (HMODULE
), &cb_needed
,
1878 LIST_MODULES_32BIT
) == 0)
1884 if (EnumProcessModules (current_process_handle
, &dummy_hmodule
,
1885 sizeof (HMODULE
), &cb_needed
) == 0)
1892 hmodules
= (HMODULE
*) alloca (cb_needed
);
1896 if (EnumProcessModulesEx (current_process_handle
, hmodules
,
1897 cb_needed
, &cb_needed
,
1898 LIST_MODULES_32BIT
) == 0)
1904 if (EnumProcessModules (current_process_handle
, hmodules
,
1905 cb_needed
, &cb_needed
) == 0)
1909 char system_dir
[__PMAX
];
1910 char syswow_dir
[__PMAX
];
1911 size_t system_dir_len
= 0;
1912 bool convert_syswow_dir
= false;
1917 /* This fails on 32bit Windows because it has no SysWOW64 directory,
1918 and in this case a path conversion isn't necessary. */
1919 UINT len
= GetSystemWow64DirectoryA (syswow_dir
, sizeof (syswow_dir
));
1922 /* Check that we have passed a large enough buffer. */
1923 gdb_assert (len
< sizeof (syswow_dir
));
1925 len
= GetSystemDirectoryA (system_dir
, sizeof (system_dir
));
1927 gdb_assert (len
!= 0);
1928 /* Check that we have passed a large enough buffer. */
1929 gdb_assert (len
< sizeof (system_dir
));
1931 strcat (system_dir
, "\\");
1932 strcat (syswow_dir
, "\\");
1933 system_dir_len
= strlen (system_dir
);
1935 convert_syswow_dir
= true;
1939 for (i
= 1; i
< (int) (cb_needed
/ sizeof (HMODULE
)); i
++)
1943 wchar_t dll_name
[__PMAX
];
1944 char dll_name_mb
[__PMAX
];
1946 char dll_name
[__PMAX
];
1949 if (GetModuleInformation (current_process_handle
, hmodules
[i
],
1950 &mi
, sizeof (mi
)) == 0)
1952 if (GetModuleFileNameEx (current_process_handle
, hmodules
[i
],
1953 dll_name
, sizeof (dll_name
)) == 0)
1956 wcstombs (dll_name_mb
, dll_name
, __PMAX
);
1961 /* Convert the DLL path of 32bit processes returned by
1962 GetModuleFileNameEx from the 64bit system directory to the
1963 32bit syswow64 directory if necessary. */
1964 std::string syswow_dll_path
;
1965 if (convert_syswow_dir
1966 && strncasecmp (name
, system_dir
, system_dir_len
) == 0
1967 && strchr (name
+ system_dir_len
, '\\') == nullptr)
1969 syswow_dll_path
= syswow_dir
;
1970 syswow_dll_path
+= name
+ system_dir_len
;
1971 name
= syswow_dll_path
.c_str();
1974 solib_end
->next
= windows_make_so (name
, mi
.lpBaseOfDll
);
1975 solib_end
= solib_end
->next
;
1980 do_initial_windows_stuff (struct target_ops
*ops
, DWORD pid
, int attaching
)
1983 struct inferior
*inf
;
1985 last_sig
= GDB_SIGNAL_0
;
1986 open_process_used
= 0;
1987 debug_registers_changed
= 0;
1988 debug_registers_used
= 0;
1989 for (i
= 0; i
< sizeof (dr
) / sizeof (dr
[0]); i
++)
1992 cygwin_load_start
= cygwin_load_end
= 0;
1994 current_event
.dwProcessId
= pid
;
1995 memset (¤t_event
, 0, sizeof (current_event
));
1996 if (!target_is_pushed (ops
))
1998 disable_breakpoints_in_shlibs ();
1999 windows_clear_solib ();
2000 clear_proceed_status (0);
2001 init_wait_for_inferior ();
2004 ignore_first_breakpoint
= !attaching
&& wow64_process
;
2008 windows_set_context_register_offsets (amd64_mappings
);
2009 windows_set_segment_register_p (amd64_windows_segment_register_p
);
2014 windows_set_context_register_offsets (i386_mappings
);
2015 windows_set_segment_register_p (i386_windows_segment_register_p
);
2018 inf
= current_inferior ();
2019 inferior_appeared (inf
, pid
);
2020 inf
->attach_flag
= attaching
;
2022 target_terminal::init ();
2023 target_terminal::inferior ();
2025 windows_initialization_done
= 0;
2029 struct target_waitstatus status
;
2031 ops
->wait (minus_one_ptid
, &status
, 0);
2033 /* Note windows_wait returns TARGET_WAITKIND_SPURIOUS for thread
2035 if (status
.kind
!= TARGET_WAITKIND_LOADED
2036 && status
.kind
!= TARGET_WAITKIND_SPURIOUS
)
2039 ops
->resume (minus_one_ptid
, 0, GDB_SIGNAL_0
);
2042 /* Now that the inferior has been started and all DLLs have been mapped,
2043 we can iterate over all DLLs and load them in.
2045 We avoid doing it any earlier because, on certain versions of Windows,
2046 LOAD_DLL_DEBUG_EVENTs are sometimes not complete. In particular,
2047 we have seen on Windows 8.1 that the ntdll.dll load event does not
2048 include the DLL name, preventing us from creating an associated SO.
2049 A possible explanation is that ntdll.dll might be mapped before
2050 the SO info gets created by the Windows system -- ntdll.dll is
2051 the first DLL to be reported via LOAD_DLL_DEBUG_EVENT and other DLLs
2052 do not seem to suffer from that problem.
2054 Rather than try to work around this sort of issue, it is much
2055 simpler to just ignore DLL load/unload events during the startup
2056 phase, and then process them all in one batch now. */
2057 windows_add_all_dlls ();
2059 windows_initialization_done
= 1;
2063 /* Try to set or remove a user privilege to the current process. Return -1
2064 if that fails, the previous setting of that privilege otherwise.
2066 This code is copied from the Cygwin source code and rearranged to allow
2067 dynamically loading of the needed symbols from advapi32 which is only
2068 available on NT/2K/XP. */
2070 set_process_privilege (const char *privilege
, BOOL enable
)
2072 HANDLE token_hdl
= NULL
;
2074 TOKEN_PRIVILEGES new_priv
, orig_priv
;
2078 if (!OpenProcessToken (GetCurrentProcess (),
2079 TOKEN_QUERY
| TOKEN_ADJUST_PRIVILEGES
,
2083 if (!LookupPrivilegeValueA (NULL
, privilege
, &restore_priv
))
2086 new_priv
.PrivilegeCount
= 1;
2087 new_priv
.Privileges
[0].Luid
= restore_priv
;
2088 new_priv
.Privileges
[0].Attributes
= enable
? SE_PRIVILEGE_ENABLED
: 0;
2090 if (!AdjustTokenPrivileges (token_hdl
, FALSE
, &new_priv
,
2091 sizeof orig_priv
, &orig_priv
, &size
))
2094 /* Disabled, otherwise every `attach' in an unprivileged user session
2095 would raise the "Failed to get SE_DEBUG_NAME privilege" warning in
2096 windows_attach(). */
2097 /* AdjustTokenPrivileges returns TRUE even if the privilege could not
2098 be enabled. GetLastError () returns an correct error code, though. */
2099 if (enable
&& GetLastError () == ERROR_NOT_ALL_ASSIGNED
)
2103 ret
= orig_priv
.Privileges
[0].Attributes
== SE_PRIVILEGE_ENABLED
? 1 : 0;
2107 CloseHandle (token_hdl
);
2112 /* Attach to process PID, then initialize for debugging it. */
2115 windows_nat_target::attach (const char *args
, int from_tty
)
2120 pid
= parse_pid_to_attach (args
);
2122 if (set_process_privilege (SE_DEBUG_NAME
, TRUE
) < 0)
2124 printf_unfiltered ("Warning: Failed to get SE_DEBUG_NAME privilege\n");
2125 printf_unfiltered ("This can cause attach to "
2126 "fail on Windows NT/2K/XP\n");
2129 windows_init_thread_list ();
2130 ok
= DebugActiveProcess (pid
);
2136 /* Try fall back to Cygwin pid. */
2137 pid
= cygwin_internal (CW_CYGWIN_PID_TO_WINPID
, pid
);
2140 ok
= DebugActiveProcess (pid
);
2145 error (_("Can't attach to process %u (error %u)"),
2146 (unsigned) pid
, (unsigned) GetLastError ());
2148 DebugSetProcessKillOnExit (FALSE
);
2152 const char *exec_file
= get_exec_file (0);
2155 printf_unfiltered ("Attaching to program `%s', %s\n", exec_file
,
2156 target_pid_to_str (ptid_t (pid
)).c_str ());
2158 printf_unfiltered ("Attaching to %s\n",
2159 target_pid_to_str (ptid_t (pid
)).c_str ());
2163 HANDLE h
= OpenProcess (PROCESS_QUERY_INFORMATION
, FALSE
, pid
);
2167 if (IsWow64Process (h
, &wow64
))
2168 wow64_process
= wow64
;
2173 do_initial_windows_stuff (this, pid
, 1);
2174 target_terminal::ours ();
2178 windows_nat_target::detach (inferior
*inf
, int from_tty
)
2182 ptid_t ptid
= minus_one_ptid
;
2183 resume (ptid
, 0, GDB_SIGNAL_0
);
2185 if (!DebugActiveProcessStop (current_event
.dwProcessId
))
2187 error (_("Can't detach process %u (error %u)"),
2188 (unsigned) current_event
.dwProcessId
, (unsigned) GetLastError ());
2191 DebugSetProcessKillOnExit (FALSE
);
2193 if (detached
&& from_tty
)
2195 const char *exec_file
= get_exec_file (0);
2198 printf_unfiltered ("Detaching from program: %s, Pid %u\n", exec_file
,
2199 (unsigned) current_event
.dwProcessId
);
2202 x86_cleanup_dregs ();
2203 inferior_ptid
= null_ptid
;
2204 detach_inferior (inf
);
2206 maybe_unpush_target ();
2209 /* Try to determine the executable filename.
2211 EXE_NAME_RET is a pointer to a buffer whose size is EXE_NAME_MAX_LEN.
2213 Upon success, the filename is stored inside EXE_NAME_RET, and
2214 this function returns nonzero.
2216 Otherwise, this function returns zero and the contents of
2217 EXE_NAME_RET is undefined. */
2220 windows_get_exec_module_filename (char *exe_name_ret
, size_t exe_name_max_len
)
2230 if (!EnumProcessModulesEx (current_process_handle
, &dh_buf
,
2231 sizeof (HMODULE
), &cbNeeded
,
2232 LIST_MODULES_32BIT
) || !cbNeeded
)
2238 if (!EnumProcessModules (current_process_handle
, &dh_buf
,
2239 sizeof (HMODULE
), &cbNeeded
) || !cbNeeded
)
2243 /* We know the executable is always first in the list of modules,
2244 which we just fetched. So no need to fetch more. */
2248 /* Cygwin prefers that the path be in /x/y/z format, so extract
2249 the filename into a temporary buffer first, and then convert it
2250 to POSIX format into the destination buffer. */
2251 cygwin_buf_t
*pathbuf
= (cygwin_buf_t
*) alloca (exe_name_max_len
* sizeof (cygwin_buf_t
));
2253 len
= GetModuleFileNameEx (current_process_handle
,
2254 dh_buf
, pathbuf
, exe_name_max_len
);
2256 error (_("Error getting executable filename: %u."),
2257 (unsigned) GetLastError ());
2258 if (cygwin_conv_path (CCP_WIN_W_TO_POSIX
, pathbuf
, exe_name_ret
,
2259 exe_name_max_len
) < 0)
2260 error (_("Error converting executable filename to POSIX: %d."), errno
);
2263 len
= GetModuleFileNameEx (current_process_handle
,
2264 dh_buf
, exe_name_ret
, exe_name_max_len
);
2266 error (_("Error getting executable filename: %u."),
2267 (unsigned) GetLastError ());
2270 return 1; /* success */
2273 /* The pid_to_exec_file target_ops method for this platform. */
2276 windows_nat_target::pid_to_exec_file (int pid
)
2278 static char path
[__PMAX
];
2280 /* Try to find exe name as symlink target of /proc/<pid>/exe. */
2282 char procexe
[sizeof ("/proc/4294967295/exe")];
2284 xsnprintf (procexe
, sizeof (procexe
), "/proc/%u/exe", pid
);
2285 nchars
= readlink (procexe
, path
, sizeof(path
));
2286 if (nchars
> 0 && nchars
< sizeof (path
))
2288 path
[nchars
] = '\0'; /* Got it */
2293 /* If we get here then either Cygwin is hosed, this isn't a Cygwin version
2294 of gdb, or we're trying to debug a non-Cygwin windows executable. */
2295 if (!windows_get_exec_module_filename (path
, sizeof (path
)))
2301 /* Print status information about what we're accessing. */
2304 windows_nat_target::files_info ()
2306 struct inferior
*inf
= current_inferior ();
2308 printf_unfiltered ("\tUsing the running image of %s %s.\n",
2309 inf
->attach_flag
? "attached" : "child",
2310 target_pid_to_str (inferior_ptid
).c_str ());
2313 /* Modify CreateProcess parameters for use of a new separate console.
2315 *FLAGS: DWORD parameter for general process creation flags.
2316 *SI: STARTUPINFO structure, for which the console window size and
2317 console buffer size is filled in if GDB is running in a console.
2318 to create the new console.
2319 The size of the used font is not available on all versions of
2320 Windows OS. Furthermore, the current font might not be the default
2321 font, but this is still better than before.
2322 If the windows and buffer sizes are computed,
2323 SI->DWFLAGS is changed so that this information is used
2324 by CreateProcess function. */
2327 windows_set_console_info (STARTUPINFO
*si
, DWORD
*flags
)
2329 HANDLE hconsole
= CreateFile ("CONOUT$", GENERIC_READ
| GENERIC_WRITE
,
2330 FILE_SHARE_READ
, NULL
, OPEN_EXISTING
, 0, 0);
2332 if (hconsole
!= INVALID_HANDLE_VALUE
)
2334 CONSOLE_SCREEN_BUFFER_INFO sbinfo
;
2336 CONSOLE_FONT_INFO cfi
;
2338 GetCurrentConsoleFont (hconsole
, FALSE
, &cfi
);
2339 font_size
= GetConsoleFontSize (hconsole
, cfi
.nFont
);
2340 GetConsoleScreenBufferInfo(hconsole
, &sbinfo
);
2341 si
->dwXSize
= sbinfo
.srWindow
.Right
- sbinfo
.srWindow
.Left
+ 1;
2342 si
->dwYSize
= sbinfo
.srWindow
.Bottom
- sbinfo
.srWindow
.Top
+ 1;
2344 si
->dwXSize
*= font_size
.X
;
2348 si
->dwYSize
*= font_size
.Y
;
2351 si
->dwXCountChars
= sbinfo
.dwSize
.X
;
2352 si
->dwYCountChars
= sbinfo
.dwSize
.Y
;
2353 si
->dwFlags
|= STARTF_USESIZE
| STARTF_USECOUNTCHARS
;
2355 *flags
|= CREATE_NEW_CONSOLE
;
2359 /* Function called by qsort to sort environment strings. */
2362 envvar_cmp (const void *a
, const void *b
)
2364 const char **p
= (const char **) a
;
2365 const char **q
= (const char **) b
;
2366 return strcasecmp (*p
, *q
);
2372 clear_win32_environment (char **env
)
2376 wchar_t *copy
= NULL
, *equalpos
;
2378 for (i
= 0; env
[i
] && *env
[i
]; i
++)
2380 len
= mbstowcs (NULL
, env
[i
], 0) + 1;
2381 copy
= (wchar_t *) xrealloc (copy
, len
* sizeof (wchar_t));
2382 mbstowcs (copy
, env
[i
], len
);
2383 equalpos
= wcschr (copy
, L
'=');
2386 SetEnvironmentVariableW (copy
, NULL
);
2394 /* Redirection of inferior I/O streams for native MS-Windows programs.
2395 Unlike on Unix, where this is handled by invoking the inferior via
2396 the shell, on MS-Windows we need to emulate the cmd.exe shell.
2398 The official documentation of the cmd.exe redirection features is here:
2400 http://www.microsoft.com/resources/documentation/windows/xp/all/proddocs/en-us/redirection.mspx
2402 (That page talks about Windows XP, but there's no newer
2403 documentation, so we assume later versions of cmd.exe didn't change
2406 Caveat: the documentation on that page seems to include a few lies.
2407 For example, it describes strange constructs 1<&2 and 2<&1, which
2408 seem to work only when 1>&2 resp. 2>&1 would make sense, and so I
2409 think the cmd.exe parser of the redirection symbols simply doesn't
2410 care about the < vs > distinction in these cases. Therefore, the
2411 supported features are explicitly documented below.
2413 The emulation below aims at supporting all the valid use cases
2414 supported by cmd.exe, which include:
2416 < FILE redirect standard input from FILE
2417 0< FILE redirect standard input from FILE
2418 <&N redirect standard input from file descriptor N
2419 0<&N redirect standard input from file descriptor N
2420 > FILE redirect standard output to FILE
2421 >> FILE append standard output to FILE
2422 1>> FILE append standard output to FILE
2423 >&N redirect standard output to file descriptor N
2424 1>&N redirect standard output to file descriptor N
2425 >>&N append standard output to file descriptor N
2426 1>>&N append standard output to file descriptor N
2427 2> FILE redirect standard error to FILE
2428 2>> FILE append standard error to FILE
2429 2>&N redirect standard error to file descriptor N
2430 2>>&N append standard error to file descriptor N
2432 Note that using N > 2 in the above construct is supported, but
2433 requires that the corresponding file descriptor be open by some
2434 means elsewhere or outside GDB. Also note that using ">&0" or
2435 "<&2" will generally fail, because the file descriptor redirected
2436 from is normally open in an incompatible mode (e.g., FD 0 is open
2437 for reading only). IOW, use of such tricks is not recommended;
2438 you are on your own.
2440 We do NOT support redirection of file descriptors above 2, as in
2441 "3>SOME-FILE", because MinGW compiled programs don't (supporting
2442 that needs special handling in the startup code that MinGW
2443 doesn't have). Pipes are also not supported.
2445 As for invalid use cases, where the redirection contains some
2446 error, the emulation below will detect that and produce some
2447 error and/or failure. But the behavior in those cases is not
2448 bug-for-bug compatible with what cmd.exe does in those cases.
2449 That's because what cmd.exe does then is not well defined, and
2450 seems to be a side effect of the cmd.exe parsing of the command
2451 line more than anything else. For example, try redirecting to an
2452 invalid file name, as in "> foo:bar".
2454 There are also minor syntactic deviations from what cmd.exe does
2455 in some corner cases. For example, it doesn't support the likes
2456 of "> &foo" to mean redirect to file named literally "&foo"; we
2457 do support that here, because that, too, sounds like some issue
2458 with the cmd.exe parser. Another nicety is that we support
2459 redirection targets that use file names with forward slashes,
2460 something cmd.exe doesn't -- this comes in handy since GDB
2461 file-name completion can be used when typing the command line for
2464 /* Support routines for redirecting standard handles of the inferior. */
2466 /* Parse a single redirection spec, open/duplicate the specified
2467 file/fd, and assign the appropriate value to one of the 3 standard
2468 file descriptors. */
2470 redir_open (const char *redir_string
, int *inp
, int *out
, int *err
)
2472 int *fd
, ref_fd
= -2;
2474 const char *fname
= redir_string
+ 1;
2475 int rc
= *redir_string
;
2490 fd
= (rc
== '2') ? err
: out
;
2491 mode
= O_WRONLY
| O_CREAT
;
2504 if (*fname
== '&' && '0' <= fname
[1] && fname
[1] <= '9')
2506 /* A reference to a file descriptor. */
2508 ref_fd
= (int) strtol (fname
+ 1, &fdtail
, 10);
2509 if (fdtail
> fname
+ 1 && *fdtail
== '\0')
2511 /* Don't allow redirection when open modes are incompatible. */
2512 if ((ref_fd
== 0 && (fd
== out
|| fd
== err
))
2513 || ((ref_fd
== 1 || ref_fd
== 2) && fd
== inp
))
2520 else if (ref_fd
== 1)
2522 else if (ref_fd
== 2)
2532 fname
++; /* skip the separator space */
2533 /* If the descriptor is already open, close it. This allows
2534 multiple specs of redirections for the same stream, which is
2535 somewhat nonsensical, but still valid and supported by cmd.exe.
2536 (But cmd.exe only opens a single file in this case, the one
2537 specified by the last redirection spec on the command line.) */
2542 *fd
= _open (fname
, mode
, _S_IREAD
| _S_IWRITE
);
2546 else if (ref_fd
== -1)
2547 *fd
= -1; /* reset to default destination */
2550 *fd
= _dup (ref_fd
);
2554 /* _open just sets a flag for O_APPEND, which won't be passed to the
2555 inferior, so we need to actually move the file pointer. */
2556 if ((mode
& O_APPEND
) != 0)
2557 _lseek (*fd
, 0L, SEEK_END
);
2561 /* Canonicalize a single redirection spec and set up the corresponding
2562 file descriptor as specified. */
2564 redir_set_redirection (const char *s
, int *inp
, int *out
, int *err
)
2566 char buf
[__PMAX
+ 2 + 5]; /* extra space for quotes & redirection string */
2568 const char *start
= s
;
2571 *d
++ = *s
++; /* copy the 1st character, < or > or a digit */
2572 if ((*start
== '>' || *start
== '1' || *start
== '2')
2576 if (*s
== '>' && *start
!= '>')
2579 else if (*start
== '0' && *s
== '<')
2581 /* cmd.exe recognizes "&N" only immediately after the redirection symbol. */
2584 while (isspace (*s
)) /* skip whitespace before file name */
2586 *d
++ = ' '; /* separate file name with a single space */
2589 /* Copy the file name. */
2592 /* Remove quoting characters from the file name in buf[]. */
2593 if (*s
== '"') /* could support '..' quoting here */
2597 else if (*s
== quote
)
2605 else if (*s
== '\\')
2607 if (s
[1] == '"') /* could support '..' here */
2611 else if (isspace (*s
) && !quote
)
2615 if (d
- buf
>= sizeof (buf
) - 1)
2617 errno
= ENAMETOOLONG
;
2623 /* Windows doesn't allow redirection characters in file names, so we
2624 can bail out early if they use them, or if there's no target file
2625 name after the redirection symbol. */
2626 if (d
[-1] == '>' || d
[-1] == '<')
2631 if (redir_open (buf
, inp
, out
, err
) == 0)
2636 /* Parse the command line for redirection specs and prepare the file
2637 descriptors for the 3 standard streams accordingly. */
2639 redirect_inferior_handles (const char *cmd_orig
, char *cmd
,
2640 int *inp
, int *out
, int *err
)
2642 const char *s
= cmd_orig
;
2645 bool retval
= false;
2647 while (isspace (*s
))
2652 if (*s
== '"') /* could also support '..' quoting here */
2656 else if (*s
== quote
)
2659 else if (*s
== '\\')
2661 if (s
[1] == '"') /* escaped quote char */
2666 /* Process a single redirection candidate. */
2667 if (*s
== '<' || *s
== '>'
2668 || ((*s
== '1' || *s
== '2') && s
[1] == '>')
2669 || (*s
== '0' && s
[1] == '<'))
2671 int skip
= redir_set_redirection (s
, inp
, out
, err
);
2685 #endif /* !__CYGWIN__ */
2687 /* Start an inferior windows child process and sets inferior_ptid to its pid.
2688 EXEC_FILE is the file to run.
2689 ALLARGS is a string containing the arguments to the program.
2690 ENV is the environment vector to pass. Errors reported with error(). */
2693 windows_nat_target::create_inferior (const char *exec_file
,
2694 const std::string
&origallargs
,
2695 char **in_env
, int from_tty
)
2699 cygwin_buf_t real_path
[__PMAX
];
2700 cygwin_buf_t shell
[__PMAX
]; /* Path to shell */
2701 cygwin_buf_t infcwd
[__PMAX
];
2703 cygwin_buf_t
*toexec
;
2704 cygwin_buf_t
*cygallargs
;
2706 char **old_env
= NULL
;
2710 int ostdin
, ostdout
, ostderr
;
2711 #else /* !__CYGWIN__ */
2712 char shell
[__PMAX
]; /* Path to shell */
2714 char *args
, *allargs_copy
;
2715 size_t args_len
, allargs_len
;
2716 int fd_inp
= -1, fd_out
= -1, fd_err
= -1;
2717 HANDLE tty
= INVALID_HANDLE_VALUE
;
2718 bool redirected
= false;
2725 #endif /* !__CYGWIN__ */
2726 const char *allargs
= origallargs
.c_str ();
2727 PROCESS_INFORMATION pi
;
2730 const char *inferior_io_terminal
= get_inferior_io_terminal ();
2733 error (_("No executable specified, use `target exec'."));
2735 const char *inferior_cwd
= get_inferior_cwd ();
2736 std::string expanded_infcwd
;
2737 if (inferior_cwd
!= NULL
)
2739 expanded_infcwd
= gdb_tilde_expand (inferior_cwd
);
2740 /* Mirror slashes on inferior's cwd. */
2741 std::replace (expanded_infcwd
.begin (), expanded_infcwd
.end (),
2743 inferior_cwd
= expanded_infcwd
.c_str ();
2746 memset (&si
, 0, sizeof (si
));
2747 si
.cb
= sizeof (si
);
2750 flags
|= CREATE_NEW_PROCESS_GROUP
;
2753 windows_set_console_info (&si
, &flags
);
2758 flags
|= DEBUG_ONLY_THIS_PROCESS
;
2759 if (cygwin_conv_path (CCP_POSIX_TO_WIN_W
, exec_file
, real_path
,
2760 __PMAX
* sizeof (cygwin_buf_t
)) < 0)
2761 error (_("Error starting executable: %d"), errno
);
2764 len
= mbstowcs (NULL
, allargs
, 0) + 1;
2765 if (len
== (size_t) -1)
2766 error (_("Error starting executable: %d"), errno
);
2767 cygallargs
= (wchar_t *) alloca (len
* sizeof (wchar_t));
2768 mbstowcs (cygallargs
, allargs
, len
);
2769 #else /* !__USEWIDE */
2770 cygallargs
= allargs
;
2776 if (cygwin_conv_path (CCP_POSIX_TO_WIN_W
, sh
, shell
, __PMAX
) < 0)
2777 error (_("Error starting executable via shell: %d"), errno
);
2779 len
= sizeof (L
" -c 'exec '") + mbstowcs (NULL
, exec_file
, 0)
2780 + mbstowcs (NULL
, allargs
, 0) + 2;
2781 cygallargs
= (wchar_t *) alloca (len
* sizeof (wchar_t));
2782 swprintf (cygallargs
, len
, L
" -c 'exec %s %s'", exec_file
, allargs
);
2783 #else /* !__USEWIDE */
2784 len
= (sizeof (" -c 'exec '") + strlen (exec_file
)
2785 + strlen (allargs
) + 2);
2786 cygallargs
= (char *) alloca (len
);
2787 xsnprintf (cygallargs
, len
, " -c 'exec %s %s'", exec_file
, allargs
);
2788 #endif /* __USEWIDE */
2790 flags
|= DEBUG_PROCESS
;
2793 if (inferior_cwd
!= NULL
2794 && cygwin_conv_path (CCP_POSIX_TO_WIN_W
, inferior_cwd
,
2795 infcwd
, strlen (inferior_cwd
)) < 0)
2796 error (_("Error converting inferior cwd: %d"), errno
);
2799 args
= (cygwin_buf_t
*) alloca ((wcslen (toexec
) + wcslen (cygallargs
) + 2)
2800 * sizeof (wchar_t));
2801 wcscpy (args
, toexec
);
2802 wcscat (args
, L
" ");
2803 wcscat (args
, cygallargs
);
2804 #else /* !__USEWIDE */
2805 args
= (cygwin_buf_t
*) alloca (strlen (toexec
) + strlen (cygallargs
) + 2);
2806 strcpy (args
, toexec
);
2808 strcat (args
, cygallargs
);
2809 #endif /* !__USEWIDE */
2811 #ifdef CW_CVT_ENV_TO_WINENV
2812 /* First try to create a direct Win32 copy of the POSIX environment. */
2813 w32_env
= (PWCHAR
) cygwin_internal (CW_CVT_ENV_TO_WINENV
, in_env
);
2814 if (w32_env
!= (PWCHAR
) -1)
2815 flags
|= CREATE_UNICODE_ENVIRONMENT
;
2817 /* If that fails, fall back to old method tweaking GDB's environment. */
2818 #endif /* CW_CVT_ENV_TO_WINENV */
2820 /* Reset all Win32 environment variables to avoid leftover on next run. */
2821 clear_win32_environment (environ
);
2822 /* Prepare the environment vars for CreateProcess. */
2825 cygwin_internal (CW_SYNC_WINENV
);
2829 if (!inferior_io_terminal
)
2830 tty
= ostdin
= ostdout
= ostderr
= -1;
2833 tty
= open (inferior_io_terminal
, O_RDWR
| O_NOCTTY
);
2836 print_sys_errmsg (inferior_io_terminal
, errno
);
2837 ostdin
= ostdout
= ostderr
= -1;
2850 windows_init_thread_list ();
2851 ret
= CreateProcess (0,
2852 args
, /* command line */
2853 NULL
, /* Security */
2855 TRUE
, /* inherit handles */
2856 flags
, /* start flags */
2857 w32_env
, /* environment */
2858 inferior_cwd
!= NULL
? infcwd
: NULL
, /* current
2863 /* Just free the Win32 environment, if it could be created. */
2867 /* Reset all environment variables to avoid leftover on next run. */
2868 clear_win32_environment (in_env
);
2869 /* Restore normal GDB environment variables. */
2871 cygwin_internal (CW_SYNC_WINENV
);
2884 #else /* !__CYGWIN__ */
2885 allargs_len
= strlen (allargs
);
2886 allargs_copy
= strcpy ((char *) alloca (allargs_len
+ 1), allargs
);
2887 if (strpbrk (allargs_copy
, "<>") != NULL
)
2892 redirect_inferior_handles (allargs
, allargs_copy
,
2893 &fd_inp
, &fd_out
, &fd_err
);
2895 warning (_("Error in redirection: %s."), safe_strerror (errno
));
2898 allargs_len
= strlen (allargs_copy
);
2900 /* If not all the standard streams are redirected by the command
2901 line, use inferior_io_terminal for those which aren't. */
2902 if (inferior_io_terminal
2903 && !(fd_inp
>= 0 && fd_out
>= 0 && fd_err
>= 0))
2905 SECURITY_ATTRIBUTES sa
;
2906 sa
.nLength
= sizeof(sa
);
2907 sa
.lpSecurityDescriptor
= 0;
2908 sa
.bInheritHandle
= TRUE
;
2909 tty
= CreateFileA (inferior_io_terminal
, GENERIC_READ
| GENERIC_WRITE
,
2910 0, &sa
, OPEN_EXISTING
, FILE_ATTRIBUTE_NORMAL
, 0);
2911 if (tty
== INVALID_HANDLE_VALUE
)
2912 warning (_("Warning: Failed to open TTY %s, error %#x."),
2913 inferior_io_terminal
, (unsigned) GetLastError ());
2915 if (redirected
|| tty
!= INVALID_HANDLE_VALUE
)
2918 si
.hStdInput
= (HANDLE
) _get_osfhandle (fd_inp
);
2919 else if (tty
!= INVALID_HANDLE_VALUE
)
2922 si
.hStdInput
= GetStdHandle (STD_INPUT_HANDLE
);
2924 si
.hStdOutput
= (HANDLE
) _get_osfhandle (fd_out
);
2925 else if (tty
!= INVALID_HANDLE_VALUE
)
2926 si
.hStdOutput
= tty
;
2928 si
.hStdOutput
= GetStdHandle (STD_OUTPUT_HANDLE
);
2930 si
.hStdError
= (HANDLE
) _get_osfhandle (fd_err
);
2931 else if (tty
!= INVALID_HANDLE_VALUE
)
2934 si
.hStdError
= GetStdHandle (STD_ERROR_HANDLE
);
2935 si
.dwFlags
|= STARTF_USESTDHANDLES
;
2939 /* Build the command line, a space-separated list of tokens where
2940 the first token is the name of the module to be executed.
2941 To avoid ambiguities introduced by spaces in the module name,
2943 args_len
= strlen (toexec
) + 2 /* quotes */ + allargs_len
+ 2;
2944 args
= (char *) alloca (args_len
);
2945 xsnprintf (args
, args_len
, "\"%s\" %s", toexec
, allargs_copy
);
2947 flags
|= DEBUG_ONLY_THIS_PROCESS
;
2949 /* CreateProcess takes the environment list as a null terminated set of
2950 strings (i.e. two nulls terminate the list). */
2952 /* Get total size for env strings. */
2953 for (envlen
= 0, i
= 0; in_env
[i
] && *in_env
[i
]; i
++)
2954 envlen
+= strlen (in_env
[i
]) + 1;
2956 envsize
= sizeof (in_env
[0]) * (i
+ 1);
2957 env
= (char **) alloca (envsize
);
2958 memcpy (env
, in_env
, envsize
);
2959 /* Windows programs expect the environment block to be sorted. */
2960 qsort (env
, i
, sizeof (char *), envvar_cmp
);
2962 w32env
= (char *) alloca (envlen
+ 1);
2964 /* Copy env strings into new buffer. */
2965 for (temp
= w32env
, i
= 0; env
[i
] && *env
[i
]; i
++)
2967 strcpy (temp
, env
[i
]);
2968 temp
+= strlen (temp
) + 1;
2971 /* Final nil string to terminate new env. */
2974 windows_init_thread_list ();
2975 ret
= CreateProcessA (0,
2976 args
, /* command line */
2977 NULL
, /* Security */
2979 TRUE
, /* inherit handles */
2980 flags
, /* start flags */
2981 w32env
, /* environment */
2982 inferior_cwd
, /* current directory */
2985 if (tty
!= INVALID_HANDLE_VALUE
)
2993 #endif /* !__CYGWIN__ */
2996 error (_("Error creating process %s, (error %u)."),
2997 exec_file
, (unsigned) GetLastError ());
3001 if (IsWow64Process (pi
.hProcess
, &wow64
))
3002 wow64_process
= wow64
;
3005 CloseHandle (pi
.hThread
);
3006 CloseHandle (pi
.hProcess
);
3008 if (useshell
&& shell
[0] != '\0')
3013 do_initial_windows_stuff (this, pi
.dwProcessId
, 0);
3015 /* windows_continue (DBG_CONTINUE, -1, 0); */
3019 windows_nat_target::mourn_inferior ()
3021 (void) windows_continue (DBG_CONTINUE
, -1, 0);
3022 x86_cleanup_dregs();
3023 if (open_process_used
)
3025 CHECK (CloseHandle (current_process_handle
));
3026 open_process_used
= 0;
3028 siginfo_er
.ExceptionCode
= 0;
3029 inf_child_target::mourn_inferior ();
3032 /* Send a SIGINT to the process group. This acts just like the user typed a
3033 ^C on the controlling terminal. */
3036 windows_nat_target::interrupt ()
3038 DEBUG_EVENTS (("gdb: GenerateConsoleCtrlEvent (CTRLC_EVENT, 0)\n"));
3039 CHECK (GenerateConsoleCtrlEvent (CTRL_C_EVENT
, current_event
.dwProcessId
));
3040 registers_changed (); /* refresh register state */
3043 /* Helper for windows_xfer_partial that handles memory transfers.
3044 Arguments are like target_xfer_partial. */
3046 static enum target_xfer_status
3047 windows_xfer_memory (gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
3048 ULONGEST memaddr
, ULONGEST len
, ULONGEST
*xfered_len
)
3052 DWORD lasterror
= 0;
3054 if (writebuf
!= NULL
)
3056 DEBUG_MEM (("gdb: write target memory, %s bytes at %s\n",
3057 pulongest (len
), core_addr_to_string (memaddr
)));
3058 success
= WriteProcessMemory (current_process_handle
,
3059 (LPVOID
) (uintptr_t) memaddr
, writebuf
,
3062 lasterror
= GetLastError ();
3063 FlushInstructionCache (current_process_handle
,
3064 (LPCVOID
) (uintptr_t) memaddr
, len
);
3068 DEBUG_MEM (("gdb: read target memory, %s bytes at %s\n",
3069 pulongest (len
), core_addr_to_string (memaddr
)));
3070 success
= ReadProcessMemory (current_process_handle
,
3071 (LPCVOID
) (uintptr_t) memaddr
, readbuf
,
3074 lasterror
= GetLastError ();
3076 *xfered_len
= (ULONGEST
) done
;
3077 if (!success
&& lasterror
== ERROR_PARTIAL_COPY
&& done
> 0)
3078 return TARGET_XFER_OK
;
3080 return success
? TARGET_XFER_OK
: TARGET_XFER_E_IO
;
3084 windows_nat_target::kill ()
3086 CHECK (TerminateProcess (current_process_handle
, 0));
3090 if (!windows_continue (DBG_CONTINUE
, -1, 1))
3092 if (!wait_for_debug_event (¤t_event
, INFINITE
))
3094 if (current_event
.dwDebugEventCode
== EXIT_PROCESS_DEBUG_EVENT
)
3098 target_mourn_inferior (inferior_ptid
); /* Or just windows_mourn_inferior? */
3102 windows_nat_target::close ()
3104 DEBUG_EVENTS (("gdb: windows_close, inferior_ptid=%d\n",
3105 inferior_ptid
.pid ()));
3108 /* Convert pid to printable format. */
3110 windows_nat_target::pid_to_str (ptid_t ptid
)
3112 if (ptid
.lwp () != 0)
3113 return string_printf ("Thread %d.0x%lx", ptid
.pid (), ptid
.lwp ());
3115 return normal_pid_to_str (ptid
);
3118 static enum target_xfer_status
3119 windows_xfer_shared_libraries (struct target_ops
*ops
,
3120 enum target_object object
, const char *annex
,
3121 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
3122 ULONGEST offset
, ULONGEST len
,
3123 ULONGEST
*xfered_len
)
3125 struct obstack obstack
;
3131 return TARGET_XFER_E_IO
;
3133 obstack_init (&obstack
);
3134 obstack_grow_str (&obstack
, "<library-list>\n");
3135 for (so
= solib_start
.next
; so
; so
= so
->next
)
3137 lm_info_windows
*li
= (lm_info_windows
*) so
->lm_info
;
3139 windows_xfer_shared_library (so
->so_name
, (CORE_ADDR
)
3140 (uintptr_t) li
->load_addr
,
3142 target_gdbarch (), &obstack
);
3144 obstack_grow_str0 (&obstack
, "</library-list>\n");
3146 buf
= (const char *) obstack_finish (&obstack
);
3147 len_avail
= strlen (buf
);
3148 if (offset
>= len_avail
)
3152 if (len
> len_avail
- offset
)
3153 len
= len_avail
- offset
;
3154 memcpy (readbuf
, buf
+ offset
, len
);
3157 obstack_free (&obstack
, NULL
);
3158 *xfered_len
= (ULONGEST
) len
;
3159 return len
!= 0 ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
3162 /* Helper for windows_nat_target::xfer_partial that handles signal info. */
3164 static enum target_xfer_status
3165 windows_xfer_siginfo (gdb_byte
*readbuf
, ULONGEST offset
, ULONGEST len
,
3166 ULONGEST
*xfered_len
)
3168 char *buf
= (char *) &siginfo_er
;
3169 size_t bufsize
= sizeof (siginfo_er
);
3172 EXCEPTION_RECORD32 er32
;
3175 buf
= (char *) &er32
;
3176 bufsize
= sizeof (er32
);
3178 er32
.ExceptionCode
= siginfo_er
.ExceptionCode
;
3179 er32
.ExceptionFlags
= siginfo_er
.ExceptionFlags
;
3180 er32
.ExceptionRecord
= (uintptr_t) siginfo_er
.ExceptionRecord
;
3181 er32
.ExceptionAddress
= (uintptr_t) siginfo_er
.ExceptionAddress
;
3182 er32
.NumberParameters
= siginfo_er
.NumberParameters
;
3184 for (i
= 0; i
< EXCEPTION_MAXIMUM_PARAMETERS
; i
++)
3185 er32
.ExceptionInformation
[i
] = siginfo_er
.ExceptionInformation
[i
];
3189 if (siginfo_er
.ExceptionCode
== 0)
3190 return TARGET_XFER_E_IO
;
3192 if (readbuf
== nullptr)
3193 return TARGET_XFER_E_IO
;
3195 if (offset
> bufsize
)
3196 return TARGET_XFER_E_IO
;
3198 if (offset
+ len
> bufsize
)
3199 len
= bufsize
- offset
;
3201 memcpy (readbuf
, buf
+ offset
, len
);
3204 return TARGET_XFER_OK
;
3207 enum target_xfer_status
3208 windows_nat_target::xfer_partial (enum target_object object
,
3209 const char *annex
, gdb_byte
*readbuf
,
3210 const gdb_byte
*writebuf
, ULONGEST offset
,
3211 ULONGEST len
, ULONGEST
*xfered_len
)
3215 case TARGET_OBJECT_MEMORY
:
3216 return windows_xfer_memory (readbuf
, writebuf
, offset
, len
, xfered_len
);
3218 case TARGET_OBJECT_LIBRARIES
:
3219 return windows_xfer_shared_libraries (this, object
, annex
, readbuf
,
3220 writebuf
, offset
, len
, xfered_len
);
3222 case TARGET_OBJECT_SIGNAL_INFO
:
3223 return windows_xfer_siginfo (readbuf
, offset
, len
, xfered_len
);
3226 if (beneath () == NULL
)
3228 /* This can happen when requesting the transfer of unsupported
3229 objects before a program has been started (and therefore
3230 with the current_target having no target beneath). */
3231 return TARGET_XFER_E_IO
;
3233 return beneath ()->xfer_partial (object
, annex
,
3234 readbuf
, writebuf
, offset
, len
,
3239 /* Provide thread local base, i.e. Thread Information Block address.
3240 Returns 1 if ptid is found and sets *ADDR to thread_local_base. */
3243 windows_nat_target::get_tib_address (ptid_t ptid
, CORE_ADDR
*addr
)
3245 windows_thread_info
*th
;
3247 th
= thread_rec (ptid
, DONT_INVALIDATE_CONTEXT
);
3252 *addr
= th
->thread_local_base
;
3258 windows_nat_target::get_ada_task_ptid (long lwp
, long thread
)
3260 return ptid_t (inferior_ptid
.pid (), lwp
, 0);
3263 /* Implementation of the to_thread_name method. */
3266 windows_nat_target::thread_name (struct thread_info
*thr
)
3268 return thread_rec (thr
->ptid
, DONT_INVALIDATE_CONTEXT
)->name
.get ();
3272 void _initialize_windows_nat ();
3274 _initialize_windows_nat ()
3276 x86_dr_low
.set_control
= cygwin_set_dr7
;
3277 x86_dr_low
.set_addr
= cygwin_set_dr
;
3278 x86_dr_low
.get_addr
= cygwin_get_dr
;
3279 x86_dr_low
.get_status
= cygwin_get_dr6
;
3280 x86_dr_low
.get_control
= cygwin_get_dr7
;
3282 /* x86_dr_low.debug_register_length field is set by
3283 calling x86_set_debug_register_length function
3284 in processor windows specific native file. */
3286 add_inf_child_target (&the_windows_nat_target
);
3289 cygwin_internal (CW_SET_DOS_FILE_WARNING
, 0);
3292 add_com ("signal-event", class_run
, signal_event_command
, _("\
3293 Signal a crashed process with event ID, to allow its debugging.\n\
3294 This command is needed in support of setting up GDB as JIT debugger on \
3295 MS-Windows. The command should be invoked from the GDB command line using \
3296 the '-ex' command-line option. The ID of the event that blocks the \
3297 crashed process will be supplied by the Windows JIT debugging mechanism."));
3300 add_setshow_boolean_cmd ("shell", class_support
, &useshell
, _("\
3301 Set use of shell to start subprocess."), _("\
3302 Show use of shell to start subprocess."), NULL
,
3304 NULL
, /* FIXME: i18n: */
3305 &setlist
, &showlist
);
3307 add_setshow_boolean_cmd ("cygwin-exceptions", class_support
,
3308 &cygwin_exceptions
, _("\
3309 Break when an exception is detected in the Cygwin DLL itself."), _("\
3310 Show whether gdb breaks on exceptions in the Cygwin DLL itself."), NULL
,
3312 NULL
, /* FIXME: i18n: */
3313 &setlist
, &showlist
);
3316 add_setshow_boolean_cmd ("new-console", class_support
, &new_console
, _("\
3317 Set creation of new console when creating child process."), _("\
3318 Show creation of new console when creating child process."), NULL
,
3320 NULL
, /* FIXME: i18n: */
3321 &setlist
, &showlist
);
3323 add_setshow_boolean_cmd ("new-group", class_support
, &new_group
, _("\
3324 Set creation of new group when creating child process."), _("\
3325 Show creation of new group when creating child process."), NULL
,
3327 NULL
, /* FIXME: i18n: */
3328 &setlist
, &showlist
);
3330 add_setshow_boolean_cmd ("debugexec", class_support
, &debug_exec
, _("\
3331 Set whether to display execution in child process."), _("\
3332 Show whether to display execution in child process."), NULL
,
3334 NULL
, /* FIXME: i18n: */
3335 &setlist
, &showlist
);
3337 add_setshow_boolean_cmd ("debugevents", class_support
, &debug_events
, _("\
3338 Set whether to display kernel events in child process."), _("\
3339 Show whether to display kernel events in child process."), NULL
,
3341 NULL
, /* FIXME: i18n: */
3342 &setlist
, &showlist
);
3344 add_setshow_boolean_cmd ("debugmemory", class_support
, &debug_memory
, _("\
3345 Set whether to display memory accesses in child process."), _("\
3346 Show whether to display memory accesses in child process."), NULL
,
3348 NULL
, /* FIXME: i18n: */
3349 &setlist
, &showlist
);
3351 add_setshow_boolean_cmd ("debugexceptions", class_support
,
3352 &debug_exceptions
, _("\
3353 Set whether to display kernel exceptions in child process."), _("\
3354 Show whether to display kernel exceptions in child process."), NULL
,
3356 NULL
, /* FIXME: i18n: */
3357 &setlist
, &showlist
);
3359 init_w32_command_list ();
3361 add_cmd ("selector", class_info
, display_selectors
,
3362 _("Display selectors infos."),
3366 /* Hardware watchpoint support, adapted from go32-nat.c code. */
3368 /* Pass the address ADDR to the inferior in the I'th debug register.
3369 Here we just store the address in dr array, the registers will be
3370 actually set up when windows_continue is called. */
3372 cygwin_set_dr (int i
, CORE_ADDR addr
)
3375 internal_error (__FILE__
, __LINE__
,
3376 _("Invalid register %d in cygwin_set_dr.\n"), i
);
3378 debug_registers_changed
= 1;
3379 debug_registers_used
= 1;
3382 /* Pass the value VAL to the inferior in the DR7 debug control
3383 register. Here we just store the address in D_REGS, the watchpoint
3384 will be actually set up in windows_wait. */
3386 cygwin_set_dr7 (unsigned long val
)
3388 dr
[7] = (CORE_ADDR
) val
;
3389 debug_registers_changed
= 1;
3390 debug_registers_used
= 1;
3393 /* Get the value of debug register I from the inferior. */
3396 cygwin_get_dr (int i
)
3401 /* Get the value of the DR6 debug status register from the inferior.
3402 Here we just return the value stored in dr[6]
3403 by the last call to thread_rec for current_event.dwThreadId id. */
3404 static unsigned long
3405 cygwin_get_dr6 (void)
3407 return (unsigned long) dr
[6];
3410 /* Get the value of the DR7 debug status register from the inferior.
3411 Here we just return the value stored in dr[7] by the last call to
3412 thread_rec for current_event.dwThreadId id. */
3414 static unsigned long
3415 cygwin_get_dr7 (void)
3417 return (unsigned long) dr
[7];
3420 /* Determine if the thread referenced by "ptid" is alive
3421 by "polling" it. If WaitForSingleObject returns WAIT_OBJECT_0
3422 it means that the thread has died. Otherwise it is assumed to be alive. */
3425 windows_nat_target::thread_alive (ptid_t ptid
)
3427 gdb_assert (ptid
.lwp () != 0);
3429 return (WaitForSingleObject (thread_rec (ptid
, DONT_INVALIDATE_CONTEXT
)->h
, 0)
3433 void _initialize_check_for_gdb_ini ();
3435 _initialize_check_for_gdb_ini ()
3438 if (inhibit_gdbinit
)
3441 homedir
= getenv ("HOME");
3445 char *oldini
= (char *) alloca (strlen (homedir
) +
3446 sizeof ("gdb.ini") + 1);
3447 strcpy (oldini
, homedir
);
3448 p
= strchr (oldini
, '\0');
3449 if (p
> oldini
&& !IS_DIR_SEPARATOR (p
[-1]))
3451 strcpy (p
, "gdb.ini");
3452 if (access (oldini
, 0) == 0)
3454 int len
= strlen (oldini
);
3455 char *newini
= (char *) alloca (len
+ 2);
3457 xsnprintf (newini
, len
+ 2, "%.*s.gdbinit",
3458 (int) (len
- (sizeof ("gdb.ini") - 1)), oldini
);
3459 warning (_("obsolete '%s' found. Rename to '%s'."), oldini
, newini
);
3464 /* Define dummy functions which always return error for the rare cases where
3465 these functions could not be found. */
3467 bad_DebugActiveProcessStop (DWORD w
)
3472 bad_DebugBreakProcess (HANDLE w
)
3477 bad_DebugSetProcessKillOnExit (BOOL w
)
3482 bad_EnumProcessModules (HANDLE w
, HMODULE
*x
, DWORD y
, LPDWORD z
)
3489 bad_GetModuleFileNameExW (HANDLE w
, HMODULE x
, LPWSTR y
, DWORD z
)
3495 bad_GetModuleFileNameExA (HANDLE w
, HMODULE x
, LPSTR y
, DWORD z
)
3502 bad_GetModuleInformation (HANDLE w
, HMODULE x
, LPMODULEINFO y
, DWORD z
)
3508 bad_OpenProcessToken (HANDLE w
, DWORD x
, PHANDLE y
)
3514 bad_GetCurrentConsoleFont (HANDLE w
, BOOL bMaxWindow
, CONSOLE_FONT_INFO
*f
)
3520 bad_GetConsoleFontSize (HANDLE w
, DWORD nFont
)
3528 /* Load any functions which may not be available in ancient versions
3531 void _initialize_loadable ();
3533 _initialize_loadable ()
3537 #define GPA(m, func) \
3538 func = (func ## _ftype *) GetProcAddress (m, #func)
3540 hm
= LoadLibrary ("kernel32.dll");
3543 GPA (hm
, DebugActiveProcessStop
);
3544 GPA (hm
, DebugBreakProcess
);
3545 GPA (hm
, DebugSetProcessKillOnExit
);
3546 GPA (hm
, GetConsoleFontSize
);
3547 GPA (hm
, DebugActiveProcessStop
);
3548 GPA (hm
, GetCurrentConsoleFont
);
3550 GPA (hm
, Wow64SuspendThread
);
3551 GPA (hm
, Wow64GetThreadContext
);
3552 GPA (hm
, Wow64SetThreadContext
);
3553 GPA (hm
, Wow64GetThreadSelectorEntry
);
3557 /* Set variables to dummy versions of these processes if the function
3558 wasn't found in kernel32.dll. */
3559 if (!DebugBreakProcess
)
3560 DebugBreakProcess
= bad_DebugBreakProcess
;
3561 if (!DebugActiveProcessStop
|| !DebugSetProcessKillOnExit
)
3563 DebugActiveProcessStop
= bad_DebugActiveProcessStop
;
3564 DebugSetProcessKillOnExit
= bad_DebugSetProcessKillOnExit
;
3566 if (!GetConsoleFontSize
)
3567 GetConsoleFontSize
= bad_GetConsoleFontSize
;
3568 if (!GetCurrentConsoleFont
)
3569 GetCurrentConsoleFont
= bad_GetCurrentConsoleFont
;
3571 /* Load optional functions used for retrieving filename information
3572 associated with the currently debugged process or its dlls. */
3573 hm
= LoadLibrary ("psapi.dll");
3576 GPA (hm
, EnumProcessModules
);
3578 GPA (hm
, EnumProcessModulesEx
);
3580 GPA (hm
, GetModuleInformation
);
3581 GetModuleFileNameEx
= (GetModuleFileNameEx_ftype
*)
3582 GetProcAddress (hm
, GetModuleFileNameEx_name
);
3585 if (!EnumProcessModules
|| !GetModuleInformation
|| !GetModuleFileNameEx
)
3587 /* Set variables to dummy versions of these processes if the function
3588 wasn't found in psapi.dll. */
3589 EnumProcessModules
= bad_EnumProcessModules
;
3590 GetModuleInformation
= bad_GetModuleInformation
;
3591 GetModuleFileNameEx
= bad_GetModuleFileNameEx
;
3592 /* This will probably fail on Windows 9x/Me. Let the user know
3593 that we're missing some functionality. */
3595 cannot automatically find executable file or library to read symbols.\n\
3596 Use \"file\" or \"dll\" command to load executable/libraries directly."));
3599 hm
= LoadLibrary ("advapi32.dll");
3602 GPA (hm
, OpenProcessToken
);
3603 GPA (hm
, LookupPrivilegeValueA
);
3604 GPA (hm
, AdjustTokenPrivileges
);
3605 /* Only need to set one of these since if OpenProcessToken fails nothing
3607 if (!OpenProcessToken
|| !LookupPrivilegeValueA
3608 || !AdjustTokenPrivileges
)
3609 OpenProcessToken
= bad_OpenProcessToken
;