1 /* Target-vector operations for controlling win32 child processes, for GDB.
2 Copyright 1995, 1996, 1997, 1998, 1999, 2000, 2001
3 Free Software Foundation, Inc.
4 Contributed by Cygnus Solutions, A Red Hat Company.
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without eve nthe implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
23 /* by Steve Chamberlain, sac@cygnus.com */
25 /* We assume we're being built with and will be used for cygwin. */
28 #include "frame.h" /* required by inferior.h */
33 #include "completer.h"
36 #include <sys/types.h>
41 #include <sys/cygwin.h>
46 #include "gdb_string.h"
47 #include "gdbthread.h"
49 #include <sys/param.h>
52 /* The ui's event loop. */
53 extern int (*ui_loop_hook) (int signo);
55 /* If we're not using the old Cygwin header file set, define the
56 following which never should have been in the generic Win32 API
57 headers in the first place since they were our own invention... */
58 #ifndef _GNU_H_WINDOWS_H
61 FLAG_TRACE_BIT = 0x100,
62 CONTEXT_DEBUGGER = (CONTEXT_FULL | CONTEXT_FLOATING_POINT)
65 #include <sys/procfs.h>
68 /* The string sent by cygwin when it processes a signal.
69 FIXME: This should be in a cygwin include file. */
70 #define CYGWIN_SIGNAL_STRING "cygwin: signal"
72 #define CHECK(x) check (x, __FILE__,__LINE__)
73 #define DEBUG_EXEC(x) if (debug_exec) printf x
74 #define DEBUG_EVENTS(x) if (debug_events) printf x
75 #define DEBUG_MEM(x) if (debug_memory) printf x
76 #define DEBUG_EXCEPT(x) if (debug_exceptions) printf x
78 /* Forward declaration */
79 extern struct target_ops child_ops;
81 static void child_stop (void);
82 static int win32_child_thread_alive (ptid_t);
83 void child_kill_inferior (void);
85 static int last_sig = 0; /* Set if a signal was received from the
87 /* Thread information structure used to track information that is
88 not available in gdb's thread structure. */
89 typedef struct thread_info_struct
91 struct thread_info_struct *next;
101 static thread_info thread_head;
103 /* The process and thread handles for the above context. */
105 static DEBUG_EVENT current_event; /* The current debug event from
107 static HANDLE current_process_handle; /* Currently executing process */
108 static thread_info *current_thread; /* Info on currently selected thread */
109 static DWORD main_thread_id; /* Thread ID of the main thread */
111 /* Counts of things. */
112 static int exception_count = 0;
113 static int event_count = 0;
116 static int new_console = 0;
117 static int new_group = 1;
118 static int debug_exec = 0; /* show execution */
119 static int debug_events = 0; /* show events from kernel */
120 static int debug_memory = 0; /* show target memory accesses */
121 static int debug_exceptions = 0; /* show target exceptions */
123 /* This vector maps GDB's idea of a register's number into an address
124 in the win32 exception context vector.
126 It also contains the bit mask needed to load the register in question.
128 One day we could read a reg, we could inspect the context we
129 already have loaded, if it doesn't have the bit set that we need,
130 we read that set of registers in using GetThreadContext. If the
131 context already contains what we need, we just unpack it. Then to
132 write a register, first we have to ensure that the context contains
133 the other regs of the group, and then we copy the info in and set
136 #define context_offset(x) ((int)&(((CONTEXT *)NULL)->x))
137 static const int mappings[] =
139 context_offset (Eax),
140 context_offset (Ecx),
141 context_offset (Edx),
142 context_offset (Ebx),
143 context_offset (Esp),
144 context_offset (Ebp),
145 context_offset (Esi),
146 context_offset (Edi),
147 context_offset (Eip),
148 context_offset (EFlags),
149 context_offset (SegCs),
150 context_offset (SegSs),
151 context_offset (SegDs),
152 context_offset (SegEs),
153 context_offset (SegFs),
154 context_offset (SegGs),
155 context_offset (FloatSave.RegisterArea[0 * 10]),
156 context_offset (FloatSave.RegisterArea[1 * 10]),
157 context_offset (FloatSave.RegisterArea[2 * 10]),
158 context_offset (FloatSave.RegisterArea[3 * 10]),
159 context_offset (FloatSave.RegisterArea[4 * 10]),
160 context_offset (FloatSave.RegisterArea[5 * 10]),
161 context_offset (FloatSave.RegisterArea[6 * 10]),
162 context_offset (FloatSave.RegisterArea[7 * 10]),
163 context_offset (FloatSave.ControlWord),
164 context_offset (FloatSave.StatusWord),
165 context_offset (FloatSave.TagWord),
166 context_offset (FloatSave.ErrorSelector),
167 context_offset (FloatSave.ErrorOffset),
168 context_offset (FloatSave.DataSelector),
169 context_offset (FloatSave.DataOffset),
170 context_offset (FloatSave.ErrorSelector)
173 #undef context_offset
175 /* This vector maps the target's idea of an exception (extracted
176 from the DEBUG_EVENT structure) to GDB's idea. */
178 struct xlate_exception
181 enum target_signal us;
184 static const struct xlate_exception
187 {EXCEPTION_ACCESS_VIOLATION, TARGET_SIGNAL_SEGV},
188 {STATUS_STACK_OVERFLOW, TARGET_SIGNAL_SEGV},
189 {EXCEPTION_BREAKPOINT, TARGET_SIGNAL_TRAP},
190 {DBG_CONTROL_C, TARGET_SIGNAL_INT},
191 {EXCEPTION_SINGLE_STEP, TARGET_SIGNAL_TRAP},
194 /* Find a thread record given a thread id.
195 If get_context then also retrieve the context for this
198 thread_rec (DWORD id, int get_context)
202 for (th = &thread_head; (th = th->next) != NULL;)
205 if (!th->suspend_count && get_context)
207 if (get_context > 0 && id != current_event.dwThreadId)
208 th->suspend_count = SuspendThread (th->h) + 1;
209 else if (get_context < 0)
210 th->suspend_count = -1;
212 th->context.ContextFlags = CONTEXT_DEBUGGER;
213 GetThreadContext (th->h, &th->context);
221 /* Add a thread to the thread list */
223 child_add_thread (DWORD id, HANDLE h)
227 if ((th = thread_rec (id, FALSE)))
230 th = (thread_info *) xmalloc (sizeof (*th));
231 memset (th, 0, sizeof (*th));
234 th->next = thread_head.next;
235 thread_head.next = th;
236 add_thread (pid_to_ptid (id));
240 /* Clear out any old thread list and reintialize it to a
243 child_init_thread_list (void)
245 thread_info *th = &thread_head;
247 DEBUG_EVENTS (("gdb: child_init_thread_list\n"));
249 while (th->next != NULL)
251 thread_info *here = th->next;
252 th->next = here->next;
253 (void) CloseHandle (here->h);
258 /* Delete a thread from the list of threads */
260 child_delete_thread (DWORD id)
265 printf_unfiltered ("[Deleting %s]\n", target_pid_to_str (pid_to_ptid (id)));
266 delete_thread (pid_to_ptid (id));
268 for (th = &thread_head;
269 th->next != NULL && th->next->id != id;
273 if (th->next != NULL)
275 thread_info *here = th->next;
276 th->next = here->next;
277 CloseHandle (here->h);
283 check (BOOL ok, const char *file, int line)
286 printf_filtered ("error return %s:%d was %lu\n", file, line, GetLastError ());
290 do_child_fetch_inferior_registers (int r)
292 char *context_offset = ((char *) ¤t_thread->context) + mappings[r];
296 l = *((long *) context_offset) & 0xffff;
297 supply_register (r, (char *) &l);
299 else if (r == FOP_REGNUM)
301 l = (*((long *) context_offset) >> 16) & ((1 << 11) - 1);
302 supply_register (r, (char *) &l);
305 supply_register (r, context_offset);
308 for (r = 0; r < NUM_REGS; r++)
309 do_child_fetch_inferior_registers (r);
314 child_fetch_inferior_registers (int r)
316 current_thread = thread_rec (PIDGET (inferior_ptid), TRUE);
317 do_child_fetch_inferior_registers (r);
321 do_child_store_inferior_registers (int r)
324 read_register_gen (r, ((char *) ¤t_thread->context) + mappings[r]);
327 for (r = 0; r < NUM_REGS; r++)
328 do_child_store_inferior_registers (r);
332 /* Store a new register value into the current thread context */
334 child_store_inferior_registers (int r)
336 current_thread = thread_rec (PIDGET (inferior_ptid), TRUE);
337 do_child_store_inferior_registers (r);
340 static int psapi_loaded = 0;
341 static HMODULE psapi_module_handle = NULL;
342 static BOOL WINAPI (*psapi_EnumProcessModules) (HANDLE, HMODULE *, DWORD, LPDWORD) = NULL;
343 static BOOL WINAPI (*psapi_GetModuleInformation) (HANDLE, HMODULE, LPMODULEINFO, DWORD) = NULL;
344 static DWORD WINAPI (*psapi_GetModuleFileNameExA) (HANDLE, HMODULE, LPSTR, DWORD) = NULL;
347 psapi_get_dll_name (DWORD BaseAddress, char *dll_name_ret)
353 HMODULE *DllHandle = dh_buf;
358 psapi_EnumProcessModules == NULL ||
359 psapi_GetModuleInformation == NULL ||
360 psapi_GetModuleFileNameExA == NULL)
365 psapi_module_handle = LoadLibrary ("psapi.dll");
366 if (!psapi_module_handle)
368 /* printf_unfiltered ("error loading psapi.dll: %u", GetLastError ()); */
371 psapi_EnumProcessModules = GetProcAddress (psapi_module_handle, "EnumProcessModules");
372 psapi_GetModuleInformation = GetProcAddress (psapi_module_handle, "GetModuleInformation");
373 psapi_GetModuleFileNameExA = (void *) GetProcAddress (psapi_module_handle,
374 "GetModuleFileNameExA");
375 if (psapi_EnumProcessModules == NULL ||
376 psapi_GetModuleInformation == NULL ||
377 psapi_GetModuleFileNameExA == NULL)
382 ok = (*psapi_EnumProcessModules) (current_process_handle,
387 if (!ok || !cbNeeded)
390 DllHandle = (HMODULE *) alloca (cbNeeded);
394 ok = (*psapi_EnumProcessModules) (current_process_handle,
401 for (i = 0; i < (int) (cbNeeded / sizeof (HMODULE)); i++)
403 if (!(*psapi_GetModuleInformation) (current_process_handle,
407 error ("Can't get module info");
409 len = (*psapi_GetModuleFileNameExA) (current_process_handle,
414 error ("Error getting dll name: %u\n", GetLastError ());
416 if ((DWORD) (mi.lpBaseOfDll) == BaseAddress)
421 dll_name_ret[0] = '\0';
425 /* Encapsulate the information required in a call to
426 symbol_file_add_args */
427 struct safe_symbol_file_add_args
431 struct section_addr_info *addrs;
434 struct ui_file *err, *out;
438 /* Call symbol_file_add with stderr redirected. We don't care if there
441 safe_symbol_file_add_stub (void *argv)
443 #define p ((struct safe_symbol_file_add_args *)argv)
444 p->ret = symbol_file_add (p->name, p->from_tty, p->addrs, p->mainline, p->flags);
449 /* Restore gdb's stderr after calling symbol_file_add */
451 safe_symbol_file_add_cleanup (void *p)
453 #define sp ((struct safe_symbol_file_add_args *)p)
454 gdb_flush (gdb_stderr);
455 gdb_flush (gdb_stdout);
456 ui_file_delete (gdb_stderr);
457 ui_file_delete (gdb_stdout);
458 gdb_stderr = sp->err;
459 gdb_stdout = sp->out;
463 /* symbol_file_add wrapper that prevents errors from being displayed. */
464 static struct objfile *
465 safe_symbol_file_add (char *name, int from_tty,
466 struct section_addr_info *addrs,
467 int mainline, int flags)
469 struct safe_symbol_file_add_args p;
470 struct cleanup *cleanup;
472 cleanup = make_cleanup (safe_symbol_file_add_cleanup, &p);
476 gdb_flush (gdb_stderr);
477 gdb_flush (gdb_stdout);
478 gdb_stderr = ui_file_new ();
479 gdb_stdout = ui_file_new ();
481 p.from_tty = from_tty;
483 p.mainline = mainline;
485 catch_errors (safe_symbol_file_add_stub, &p, "", RETURN_MASK_ERROR);
487 do_cleanups (cleanup);
491 /* Maintain a linked list of "so" information. */
494 struct so_stuff *next, **last;
498 solib_start, *solib_end;
500 /* Remember the maximum DLL length for printing in info dll command. */
501 int max_dll_name_len;
504 register_loaded_dll (const char *name, DWORD load_addr)
507 so = (struct so_stuff *) xmalloc (sizeof (struct so_stuff) + strlen (name) + 8 + 2);
508 so->load_addr = load_addr;
509 strcpy (so->name, name);
511 solib_end->next = so;
516 /* Wait for child to do something. Return pid of child, or -1 in case
517 of error; store status through argument pointer OURSTATUS. */
519 handle_load_dll (void *dummy ATTRIBUTE_UNUSED)
521 LOAD_DLL_DEBUG_INFO *event = ¤t_event.u.LoadDll;
524 char dll_buf[MAX_PATH + 1];
525 char *dll_name = NULL;
529 dll_buf[0] = dll_buf[sizeof (dll_buf) - 1] = '\0';
531 if (!psapi_get_dll_name ((DWORD) (event->lpBaseOfDll), dll_buf))
532 dll_buf[0] = dll_buf[sizeof (dll_buf) - 1] = '\0';
536 /* Attempt to read the name of the dll that was detected.
537 This is documented to work only when actively debugging
538 a program. It will not work for attached processes. */
539 if (dll_name == NULL || *dll_name == '\0')
541 DWORD size = event->fUnicode ? sizeof (WCHAR) : sizeof (char);
545 ReadProcessMemory (current_process_handle,
546 (LPCVOID) event->lpImageName,
547 (char *) &dll_name_ptr,
548 sizeof (dll_name_ptr), &done);
550 /* See if we could read the address of a string, and that the
551 address isn't null. */
553 if (done != sizeof (dll_name_ptr) || !dll_name_ptr)
558 ReadProcessMemory (current_process_handle,
559 (LPCVOID) (dll_name_ptr + len * size),
565 while ((b[0] != 0 || b[size - 1] != 0) && done == size);
567 dll_name = alloca (len);
571 WCHAR *unicode_dll_name = (WCHAR *) alloca (len * sizeof (WCHAR));
572 ReadProcessMemory (current_process_handle,
573 (LPCVOID) dll_name_ptr,
575 len * sizeof (WCHAR),
578 WideCharToMultiByte (CP_ACP, 0,
579 unicode_dll_name, len,
580 dll_name, len, 0, 0);
584 ReadProcessMemory (current_process_handle,
585 (LPCVOID) dll_name_ptr,
595 (void) strlwr (dll_name);
597 while ((p = strchr (dll_name, '\\')))
600 register_loaded_dll (dll_name, (DWORD) event->lpBaseOfDll + 0x1000);
601 len = strlen (dll_name);
602 if (len > max_dll_name_len)
603 max_dll_name_len = len;
608 /* Return name of last loaded DLL. */
610 child_solib_loaded_library_pathname (int pid ATTRIBUTE_UNUSED)
612 return !solib_end || !solib_end->name[0] ? NULL : solib_end->name;
615 /* Clear list of loaded DLLs. */
617 child_clear_solibs (void)
619 struct so_stuff *so, *so1 = solib_start.next;
621 while ((so = so1) != NULL)
627 solib_start.next = NULL;
628 solib_end = &solib_start;
629 max_dll_name_len = sizeof ("DLL Name") - 1;
632 /* Add DLL symbol information. */
634 solib_symbols_add (char *name, CORE_ADDR load_addr)
636 struct section_addr_info section_addrs;
638 /* The symbols in a dll are offset by 0x1000, which is the
639 the offset from 0 of the first byte in an image - because
640 of the file header and the section alignment. */
642 if (!name || !name[0])
645 memset (§ion_addrs, 0, sizeof (section_addrs));
646 section_addrs.other[0].name = ".text";
647 section_addrs.other[0].addr = load_addr;
648 safe_symbol_file_add (name, 0, §ion_addrs, 0, OBJF_SHARED);
653 /* Load DLL symbol info. */
655 dll_symbol_command (char *args, int from_tty ATTRIBUTE_UNUSED)
661 error ("dll-symbols requires a file name");
664 if (n > 4 && strcasecmp (args + n - 4, ".dll") != 0)
666 char *newargs = (char *) alloca (n + 4 + 1);
667 strcpy (newargs, args);
668 strcat (newargs, ".dll");
672 safe_symbol_file_add (args, 0, NULL, 0, OBJF_SHARED | OBJF_USERLOADED);
675 /* List currently loaded DLLs. */
677 info_dll_command (char *ignore ATTRIBUTE_UNUSED, int from_tty ATTRIBUTE_UNUSED)
679 struct so_stuff *so = &solib_start;
684 printf ("%*s Load Address\n", -max_dll_name_len, "DLL Name");
685 while ((so = so->next) != NULL)
686 printf_filtered ("%*s %08lx\n", -max_dll_name_len, so->name, so->load_addr);
691 /* Handle DEBUG_STRING output from child process.
692 Cygwin prepends its messages with a "cygwin:". Interpret this as
693 a Cygwin signal. Otherwise just print the string as a warning. */
695 handle_output_debug_string (struct target_waitstatus *ourstatus)
700 if (!target_read_string
701 ((CORE_ADDR) current_event.u.DebugString.lpDebugStringData, &s, 1024, 0)
705 if (strncmp (s, CYGWIN_SIGNAL_STRING, sizeof (CYGWIN_SIGNAL_STRING) - 1) != 0)
707 if (strncmp (s, "cYg", 3) != 0)
713 int sig = strtol (s + sizeof (CYGWIN_SIGNAL_STRING) - 1, &p, 0);
714 gotasig = target_signal_from_host (sig);
715 ourstatus->value.sig = gotasig;
717 ourstatus->kind = TARGET_WAITKIND_STOPPED;
725 handle_exception (struct target_waitstatus *ourstatus)
728 DWORD code = current_event.u.Exception.ExceptionRecord.ExceptionCode;
730 ourstatus->kind = TARGET_WAITKIND_STOPPED;
732 /* Record the context of the current thread */
733 th = thread_rec (current_event.dwThreadId, -1);
737 case EXCEPTION_ACCESS_VIOLATION:
738 DEBUG_EXCEPT (("gdb: Target exception ACCESS_VIOLATION at 0x%08lx\n",
739 (DWORD) current_event.u.Exception.ExceptionRecord.ExceptionAddress));
740 ourstatus->value.sig = TARGET_SIGNAL_SEGV;
743 case STATUS_FLOAT_UNDERFLOW:
744 case STATUS_FLOAT_DIVIDE_BY_ZERO:
745 case STATUS_FLOAT_OVERFLOW:
746 case STATUS_INTEGER_DIVIDE_BY_ZERO:
747 DEBUG_EXCEPT (("gdb: Target exception STACK_OVERFLOW at 0x%08lx\n",
748 (DWORD) current_event.u.Exception.ExceptionRecord.ExceptionAddress));
749 ourstatus->value.sig = TARGET_SIGNAL_FPE;
752 case STATUS_STACK_OVERFLOW:
753 DEBUG_EXCEPT (("gdb: Target exception STACK_OVERFLOW at 0x%08lx\n",
754 (DWORD) current_event.u.Exception.ExceptionRecord.ExceptionAddress));
755 ourstatus->value.sig = TARGET_SIGNAL_SEGV;
757 case EXCEPTION_BREAKPOINT:
758 DEBUG_EXCEPT (("gdb: Target exception BREAKPOINT at 0x%08lx\n",
759 (DWORD) current_event.u.Exception.ExceptionRecord.ExceptionAddress));
760 ourstatus->value.sig = TARGET_SIGNAL_TRAP;
763 DEBUG_EXCEPT (("gdb: Target exception CONTROL_C at 0x%08lx\n",
764 (DWORD) current_event.u.Exception.ExceptionRecord.ExceptionAddress));
765 ourstatus->value.sig = TARGET_SIGNAL_INT;
766 last_sig = SIGINT; /* FIXME - should check pass state */
768 case EXCEPTION_SINGLE_STEP:
769 DEBUG_EXCEPT (("gdb: Target exception SINGLE_STEP at 0x%08lx\n",
770 (DWORD) current_event.u.Exception.ExceptionRecord.ExceptionAddress));
771 ourstatus->value.sig = TARGET_SIGNAL_TRAP;
773 case EXCEPTION_ILLEGAL_INSTRUCTION:
774 DEBUG_EXCEPT (("gdb: Target exception SINGLE_ILL at 0x%08lx\n",
775 (DWORD) current_event.u.Exception.ExceptionRecord.ExceptionAddress));
776 ourstatus->value.sig = TARGET_SIGNAL_ILL;
780 printf_unfiltered ("gdb: unknown target exception 0x%08lx at 0x%08lx\n",
781 current_event.u.Exception.ExceptionRecord.ExceptionCode,
782 (DWORD) current_event.u.Exception.ExceptionRecord.ExceptionAddress);
783 ourstatus->value.sig = TARGET_SIGNAL_UNKNOWN;
790 /* Resume all artificially suspended threads if we are continuing
793 child_continue (DWORD continue_status, int id)
799 DEBUG_EVENTS (("ContinueDebugEvent (cpid=%ld, ctid=%ld, DBG_CONTINUE);\n",
800 current_event.dwProcessId, current_event.dwThreadId));
801 res = ContinueDebugEvent (current_event.dwProcessId,
802 current_event.dwThreadId,
806 for (th = &thread_head; (th = th->next) != NULL;)
807 if (((id == -1) || (id == (int) th->id)) && th->suspend_count)
809 for (i = 0; i < th->suspend_count; i++)
810 (void) ResumeThread (th->h);
811 th->suspend_count = 0;
817 /* Get the next event from the child. Return 1 if the event requires
818 handling by WFI (or whatever).
821 get_child_debug_event (int pid ATTRIBUTE_UNUSED, struct target_waitstatus *ourstatus)
824 DWORD continue_status, event_code;
825 thread_info *th = NULL;
826 static thread_info dummy_thread_info;
831 if (!(debug_event = WaitForDebugEvent (¤t_event, 1000)))
835 continue_status = DBG_CONTINUE;
837 event_code = current_event.dwDebugEventCode;
838 ourstatus->kind = TARGET_WAITKIND_SPURIOUS;
842 case CREATE_THREAD_DEBUG_EVENT:
843 DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%x code=%s)\n",
844 (unsigned) current_event.dwProcessId,
845 (unsigned) current_event.dwThreadId,
846 "CREATE_THREAD_DEBUG_EVENT"));
847 /* Record the existence of this thread */
848 th = child_add_thread (current_event.dwThreadId,
849 current_event.u.CreateThread.hThread);
851 printf_unfiltered ("[New %s]\n",
853 pid_to_ptid (current_event.dwThreadId)));
854 retval = current_event.dwThreadId;
857 case EXIT_THREAD_DEBUG_EVENT:
858 DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n",
859 (unsigned) current_event.dwProcessId,
860 (unsigned) current_event.dwThreadId,
861 "EXIT_THREAD_DEBUG_EVENT"));
862 child_delete_thread (current_event.dwThreadId);
863 th = &dummy_thread_info;
866 case CREATE_PROCESS_DEBUG_EVENT:
867 DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n",
868 (unsigned) current_event.dwProcessId,
869 (unsigned) current_event.dwThreadId,
870 "CREATE_PROCESS_DEBUG_EVENT"));
871 CloseHandle (current_event.u.CreateProcessInfo.hFile);
872 current_process_handle = current_event.u.CreateProcessInfo.hProcess;
874 main_thread_id = current_event.dwThreadId;
875 /* Add the main thread */
877 th = child_add_thread (current_event.dwProcessId,
878 current_event.u.CreateProcessInfo.hProcess);
880 th = child_add_thread (main_thread_id,
881 current_event.u.CreateProcessInfo.hThread);
882 retval = ourstatus->value.related_pid = current_event.dwThreadId;
885 case EXIT_PROCESS_DEBUG_EVENT:
886 DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n",
887 (unsigned) current_event.dwProcessId,
888 (unsigned) current_event.dwThreadId,
889 "EXIT_PROCESS_DEBUG_EVENT"));
890 ourstatus->kind = TARGET_WAITKIND_EXITED;
891 ourstatus->value.integer = current_event.u.ExitProcess.dwExitCode;
892 CloseHandle (current_process_handle);
893 retval = main_thread_id;
896 case LOAD_DLL_DEBUG_EVENT:
897 DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n",
898 (unsigned) current_event.dwProcessId,
899 (unsigned) current_event.dwThreadId,
900 "LOAD_DLL_DEBUG_EVENT"));
901 CloseHandle (current_event.u.LoadDll.hFile);
902 catch_errors (handle_load_dll, NULL, (char *) "", RETURN_MASK_ALL);
903 registers_changed (); /* mark all regs invalid */
904 ourstatus->kind = TARGET_WAITKIND_LOADED;
905 ourstatus->value.integer = 0;
906 retval = main_thread_id;
909 case UNLOAD_DLL_DEBUG_EVENT:
910 DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n",
911 (unsigned) current_event.dwProcessId,
912 (unsigned) current_event.dwThreadId,
913 "UNLOAD_DLL_DEBUG_EVENT"));
914 break; /* FIXME: don't know what to do here */
916 case EXCEPTION_DEBUG_EVENT:
917 DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n",
918 (unsigned) current_event.dwProcessId,
919 (unsigned) current_event.dwThreadId,
920 "EXCEPTION_DEBUG_EVENT"));
921 handle_exception (ourstatus);
922 retval = current_event.dwThreadId;
925 case OUTPUT_DEBUG_STRING_EVENT: /* message from the kernel */
926 DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n",
927 (unsigned) current_event.dwProcessId,
928 (unsigned) current_event.dwThreadId,
929 "OUTPUT_DEBUG_STRING_EVENT"));
930 if (handle_output_debug_string (ourstatus))
931 retval = main_thread_id;
935 printf_unfiltered ("gdb: kernel event for pid=%ld tid=%ld\n",
936 (DWORD) current_event.dwProcessId,
937 (DWORD) current_event.dwThreadId);
938 printf_unfiltered (" unknown event code %ld\n",
939 current_event.dwDebugEventCode);
944 CHECK (child_continue (continue_status, -1));
947 current_thread = th ? : thread_rec (current_event.dwThreadId, TRUE);
948 inferior_ptid = pid_to_ptid (retval);
955 /* Wait for interesting events to occur in the target process. */
957 child_wait (ptid_t ptid, struct target_waitstatus *ourstatus)
959 int pid = PIDGET (ptid);
961 /* We loop when we get a non-standard exception rather than return
962 with a SPURIOUS because resume can try and step or modify things,
963 which needs a current_thread->h. But some of these exceptions mark
964 the birth or death of threads, which mean that the current thread
965 isn't necessarily what you think it is. */
969 int retval = get_child_debug_event (pid, ourstatus);
971 return pid_to_ptid (retval);
976 if (ui_loop_hook != NULL)
977 detach = ui_loop_hook (0);
980 child_kill_inferior ();
986 do_initial_child_stuff (DWORD pid)
988 extern int stop_after_trap;
993 current_event.dwProcessId = pid;
994 memset (¤t_event, 0, sizeof (current_event));
995 push_target (&child_ops);
996 child_init_thread_list ();
997 child_clear_solibs ();
998 clear_proceed_status ();
999 init_wait_for_inferior ();
1001 target_terminal_init ();
1002 target_terminal_inferior ();
1006 stop_after_trap = 1;
1007 wait_for_inferior ();
1008 if (stop_signal != TARGET_SIGNAL_TRAP)
1009 resume (0, stop_signal);
1013 stop_after_trap = 0;
1017 /* Attach to process PID, then initialize for debugging it. */
1020 child_attach (char *args, int from_tty)
1026 error_no_arg ("process-id to attach");
1028 pid = strtoul (args, 0, 0);
1029 ok = DebugActiveProcess (pid);
1032 error ("Can't attach to process.");
1036 char *exec_file = (char *) get_exec_file (0);
1039 printf_unfiltered ("Attaching to program `%s', %s\n", exec_file,
1040 target_pid_to_str (pid_to_ptid (pid)));
1042 printf_unfiltered ("Attaching to %s\n",
1043 target_pid_to_str (pid_to_ptid (pid)));
1045 gdb_flush (gdb_stdout);
1048 do_initial_child_stuff (pid);
1049 target_terminal_ours ();
1053 child_detach (char *args ATTRIBUTE_UNUSED, int from_tty)
1057 char *exec_file = get_exec_file (0);
1060 printf_unfiltered ("Detaching from program: %s %s\n", exec_file,
1061 target_pid_to_str (inferior_ptid));
1062 gdb_flush (gdb_stdout);
1064 inferior_ptid = null_ptid;
1065 unpush_target (&child_ops);
1068 /* Print status information about what we're accessing. */
1071 child_files_info (struct target_ops *ignore ATTRIBUTE_UNUSED)
1073 printf_unfiltered ("\tUsing the running image of %s %s.\n",
1074 attach_flag ? "attached" : "child", target_pid_to_str (inferior_ptid));
1079 child_open (char *arg ATTRIBUTE_UNUSED, int from_tty ATTRIBUTE_UNUSED)
1081 error ("Use the \"run\" command to start a Unix child process.");
1084 /* Start an inferior win32 child process and sets inferior_ptid to its pid.
1085 EXEC_FILE is the file to run.
1086 ALLARGS is a string containing the arguments to the program.
1087 ENV is the environment vector to pass. Errors reported with error(). */
1090 child_create_inferior (char *exec_file, char *allargs, char **env)
1092 char real_path[MAXPATHLEN];
1098 PROCESS_INFORMATION pi;
1104 error ("No executable specified, use `target exec'.\n");
1106 memset (&si, 0, sizeof (si));
1107 si.cb = sizeof (si);
1109 cygwin_conv_to_win32_path (exec_file, real_path);
1111 flags = DEBUG_ONLY_THIS_PROCESS;
1114 flags |= CREATE_NEW_PROCESS_GROUP;
1117 flags |= CREATE_NEW_CONSOLE;
1119 args = alloca (strlen (real_path) + strlen (allargs) + 2);
1121 strcpy (args, real_path);
1124 strcat (args, allargs);
1126 /* Prepare the environment vars for CreateProcess. */
1128 /* This code use to assume all env vars were file names and would
1129 translate them all to win32 style. That obviously doesn't work in the
1130 general case. The current rule is that we only translate PATH.
1131 We need to handle PATH because we're about to call CreateProcess and
1132 it uses PATH to find DLL's. Fortunately PATH has a well-defined value
1133 in both posix and win32 environments. cygwin.dll will change it back
1134 to posix style if necessary. */
1136 static const char *conv_path_names[] =
1142 /* CreateProcess takes the environment list as a null terminated set of
1143 strings (i.e. two nulls terminate the list). */
1145 /* Get total size for env strings. */
1146 for (envlen = 0, i = 0; env[i] && *env[i]; i++)
1150 for (j = 0; conv_path_names[j]; j++)
1152 len = strlen (conv_path_names[j]);
1153 if (strncmp (conv_path_names[j], env[i], len) == 0)
1155 if (cygwin_posix_path_list_p (env[i] + len))
1157 + cygwin_posix_to_win32_path_list_buf_size (env[i] + len);
1159 envlen += strlen (env[i]) + 1;
1163 if (conv_path_names[j] == NULL)
1164 envlen += strlen (env[i]) + 1;
1167 winenv = alloca (envlen + 1);
1169 /* Copy env strings into new buffer. */
1170 for (temp = winenv, i = 0; env[i] && *env[i]; i++)
1174 for (j = 0; conv_path_names[j]; j++)
1176 len = strlen (conv_path_names[j]);
1177 if (strncmp (conv_path_names[j], env[i], len) == 0)
1179 if (cygwin_posix_path_list_p (env[i] + len))
1181 memcpy (temp, env[i], len);
1182 cygwin_posix_to_win32_path_list (env[i] + len, temp + len);
1185 strcpy (temp, env[i]);
1189 if (conv_path_names[j] == NULL)
1190 strcpy (temp, env[i]);
1192 temp += strlen (temp) + 1;
1195 /* Final nil string to terminate new env. */
1199 ret = CreateProcess (0,
1200 args, /* command line */
1201 NULL, /* Security */
1203 TRUE, /* inherit handles */
1204 flags, /* start flags */
1206 NULL, /* current directory */
1210 error ("Error creating process %s, (error %d)\n", exec_file, GetLastError ());
1212 CloseHandle (pi.hThread);
1213 CloseHandle (pi.hProcess);
1214 do_initial_child_stuff (pi.dwProcessId);
1216 /* child_continue (DBG_CONTINUE, -1); */
1217 proceed ((CORE_ADDR) - 1, TARGET_SIGNAL_0, 0);
1221 child_mourn_inferior (void)
1223 (void) child_continue (DBG_CONTINUE, -1);
1224 unpush_target (&child_ops);
1225 generic_mourn_inferior ();
1228 /* Send a SIGINT to the process group. This acts just like the user typed a
1229 ^C on the controlling terminal. */
1234 DEBUG_EVENTS (("gdb: GenerateConsoleCtrlEvent (CTRLC_EVENT, 0)\n"));
1235 CHECK (GenerateConsoleCtrlEvent (CTRL_C_EVENT, current_event.dwProcessId));
1236 registers_changed (); /* refresh register state */
1240 child_xfer_memory (CORE_ADDR memaddr, char *our, int len,
1241 int write, struct mem_attrib *mem ATTRIBUTE_UNUSED,
1242 struct target_ops *target ATTRIBUTE_UNUSED)
1247 DEBUG_MEM (("gdb: write target memory, %d bytes at 0x%08lx\n",
1248 len, (DWORD) memaddr));
1249 WriteProcessMemory (current_process_handle, (LPVOID) memaddr, our,
1251 FlushInstructionCache (current_process_handle, (LPCVOID) memaddr, len);
1255 DEBUG_MEM (("gdb: read target memory, %d bytes at 0x%08lx\n",
1256 len, (DWORD) memaddr));
1257 ReadProcessMemory (current_process_handle, (LPCVOID) memaddr, our, len,
1264 child_kill_inferior (void)
1266 CHECK (TerminateProcess (current_process_handle, 0));
1270 if (!child_continue (DBG_CONTINUE, -1))
1272 if (!WaitForDebugEvent (¤t_event, INFINITE))
1274 if (current_event.dwDebugEventCode == EXIT_PROCESS_DEBUG_EVENT)
1278 CHECK (CloseHandle (current_process_handle));
1280 /* this may fail in an attached process so don't check. */
1281 (void) CloseHandle (current_thread->h);
1282 target_mourn_inferior (); /* or just child_mourn_inferior? */
1286 child_resume (ptid_t ptid, int step, enum target_signal sig)
1289 DWORD continue_status = last_sig > 0 && last_sig < NSIG ?
1290 DBG_EXCEPTION_NOT_HANDLED : DBG_CONTINUE;
1291 int pid = PIDGET (ptid);
1295 DEBUG_EXEC (("gdb: child_resume (pid=%d, step=%d, sig=%d);\n",
1298 /* Get context for currently selected thread */
1299 th = thread_rec (current_event.dwThreadId, FALSE);
1304 /* Single step by setting t bit */
1305 child_fetch_inferior_registers (PS_REGNUM);
1306 th->context.EFlags |= FLAG_TRACE_BIT;
1309 if (th->context.ContextFlags)
1311 CHECK (SetThreadContext (th->h, &th->context));
1312 th->context.ContextFlags = 0;
1316 /* Allow continuing with the same signal that interrupted us.
1317 Otherwise complain. */
1319 child_continue (continue_status, pid);
1323 child_prepare_to_store (void)
1325 /* Do nothing, since we can store individual regs */
1329 child_can_run (void)
1335 child_close (int x ATTRIBUTE_UNUSED)
1337 DEBUG_EVENTS (("gdb: child_close, inferior_ptid=%d\n",
1338 PIDGET (inferior_ptid)));
1341 struct target_ops child_ops;
1344 init_child_ops (void)
1346 child_ops.to_shortname = "child";
1347 child_ops.to_longname = "Win32 child process";
1348 child_ops.to_doc = "Win32 child process (started by the \"run\" command).";
1349 child_ops.to_open = child_open;
1350 child_ops.to_close = child_close;
1351 child_ops.to_attach = child_attach;
1352 child_ops.to_detach = child_detach;
1353 child_ops.to_resume = child_resume;
1354 child_ops.to_wait = child_wait;
1355 child_ops.to_fetch_registers = child_fetch_inferior_registers;
1356 child_ops.to_store_registers = child_store_inferior_registers;
1357 child_ops.to_prepare_to_store = child_prepare_to_store;
1358 child_ops.to_xfer_memory = child_xfer_memory;
1359 child_ops.to_files_info = child_files_info;
1360 child_ops.to_insert_breakpoint = memory_insert_breakpoint;
1361 child_ops.to_remove_breakpoint = memory_remove_breakpoint;
1362 child_ops.to_terminal_init = terminal_init_inferior;
1363 child_ops.to_terminal_inferior = terminal_inferior;
1364 child_ops.to_terminal_ours_for_output = terminal_ours_for_output;
1365 child_ops.to_terminal_ours = terminal_ours;
1366 child_ops.to_terminal_info = child_terminal_info;
1367 child_ops.to_kill = child_kill_inferior;
1368 child_ops.to_load = 0;
1369 child_ops.to_lookup_symbol = 0;
1370 child_ops.to_create_inferior = child_create_inferior;
1371 child_ops.to_mourn_inferior = child_mourn_inferior;
1372 child_ops.to_can_run = child_can_run;
1373 child_ops.to_notice_signals = 0;
1374 child_ops.to_thread_alive = win32_child_thread_alive;
1375 child_ops.to_pid_to_str = cygwin_pid_to_str;
1376 child_ops.to_stop = child_stop;
1377 child_ops.to_stratum = process_stratum;
1378 child_ops.DONT_USE = 0;
1379 child_ops.to_has_all_memory = 1;
1380 child_ops.to_has_memory = 1;
1381 child_ops.to_has_stack = 1;
1382 child_ops.to_has_registers = 1;
1383 child_ops.to_has_execution = 1;
1384 child_ops.to_sections = 0;
1385 child_ops.to_sections_end = 0;
1386 child_ops.to_magic = OPS_MAGIC;
1390 _initialize_inftarg (void)
1392 struct cmd_list_element *c;
1396 c = add_com ("dll-symbols", class_files, dll_symbol_command,
1397 "Load dll library symbols from FILE.");
1398 c->completer = filename_completer;
1401 add_com_alias ("sharedlibrary", "dll-symbols", class_alias, 1);
1403 add_show_from_set (add_set_cmd ("new-console", class_support, var_boolean,
1404 (char *) &new_console,
1405 "Set creation of new console when creating child process.",
1409 add_show_from_set (add_set_cmd ("new-group", class_support, var_boolean,
1410 (char *) &new_group,
1411 "Set creation of new group when creating child process.",
1415 add_show_from_set (add_set_cmd ("debugexec", class_support, var_boolean,
1416 (char *) &debug_exec,
1417 "Set whether to display execution in child process.",
1421 add_show_from_set (add_set_cmd ("debugevents", class_support, var_boolean,
1422 (char *) &debug_events,
1423 "Set whether to display kernel events in child process.",
1427 add_show_from_set (add_set_cmd ("debugmemory", class_support, var_boolean,
1428 (char *) &debug_memory,
1429 "Set whether to display memory accesses in child process.",
1433 add_show_from_set (add_set_cmd ("debugexceptions", class_support, var_boolean,
1434 (char *) &debug_exceptions,
1435 "Set whether to display kernel exceptions in child process.",
1439 add_info ("dll", info_dll_command, "Status of loaded DLLs.");
1440 add_info_alias ("sharedlibrary", "dll", 1);
1442 add_target (&child_ops);
1445 /* Determine if the thread referenced by "pid" is alive
1446 by "polling" it. If WaitForSingleObject returns WAIT_OBJECT_0
1447 it means that the pid has died. Otherwise it is assumed to be alive. */
1449 win32_child_thread_alive (ptid_t ptid)
1451 int pid = PIDGET (ptid);
1453 return WaitForSingleObject (thread_rec (pid, FALSE)->h, 0) == WAIT_OBJECT_0 ?
1457 /* Convert pid to printable format. */
1459 cygwin_pid_to_str (ptid_t ptid)
1461 static char buf[80];
1462 int pid = PIDGET (ptid);
1464 if ((DWORD) pid == current_event.dwProcessId)
1465 sprintf (buf, "process %d", pid);
1467 sprintf (buf, "thread %ld.0x%x", current_event.dwProcessId, pid);
1472 core_dll_symbols_add (char *dll_name, DWORD base_addr)
1474 struct objfile *objfile;
1475 char *objfile_basename;
1476 const char *dll_basename;
1478 if (!(dll_basename = strrchr (dll_name, '/')))
1479 dll_basename = dll_name;
1483 ALL_OBJFILES (objfile)
1485 objfile_basename = strrchr (objfile->name, '/');
1487 if (objfile_basename &&
1488 strcmp (dll_basename, objfile_basename + 1) == 0)
1490 printf_unfiltered ("%08lx:%s (symbols previously loaded)\n",
1491 base_addr, dll_name);
1496 register_loaded_dll (dll_name, base_addr + 0x1000);
1497 solib_symbols_add (dll_name, (CORE_ADDR) base_addr + 0x1000);
1505 struct target_ops *target;
1508 map_code_section_args;
1511 map_single_dll_code_section (bfd * abfd, asection * sect, void *obj)
1515 struct section_table *new_target_sect_ptr;
1517 map_code_section_args *args = (map_code_section_args *) obj;
1518 struct target_ops *target = args->target;
1519 if (sect->flags & SEC_CODE)
1521 update_coreops = core_ops.to_sections == target->to_sections;
1523 if (target->to_sections)
1525 old = target->to_sections_end - target->to_sections;
1526 target->to_sections = (struct section_table *)
1527 xrealloc ((char *) target->to_sections,
1528 (sizeof (struct section_table)) * (1 + old));
1533 target->to_sections = (struct section_table *)
1534 xmalloc ((sizeof (struct section_table)));
1536 target->to_sections_end = target->to_sections + (1 + old);
1538 /* Update the to_sections field in the core_ops structure
1542 core_ops.to_sections = target->to_sections;
1543 core_ops.to_sections_end = target->to_sections_end;
1545 new_target_sect_ptr = target->to_sections + old;
1546 new_target_sect_ptr->addr = args->addr + bfd_section_vma (abfd, sect);
1547 new_target_sect_ptr->endaddr = args->addr + bfd_section_vma (abfd, sect) +
1548 bfd_section_size (abfd, sect);;
1549 new_target_sect_ptr->the_bfd_section = sect;
1550 new_target_sect_ptr->bfd = abfd;
1555 dll_code_sections_add (const char *dll_name, int base_addr, struct target_ops *target)
1558 map_code_section_args map_args;
1559 asection *lowest_sect;
1561 if (dll_name == NULL || target == NULL)
1563 name = xstrdup (dll_name);
1564 dll_bfd = bfd_openr (name, "pei-i386");
1565 if (dll_bfd == NULL)
1568 if (bfd_check_format (dll_bfd, bfd_object))
1570 lowest_sect = bfd_get_section_by_name (dll_bfd, ".text");
1571 if (lowest_sect == NULL)
1573 map_args.target = target;
1574 map_args.addr = base_addr - bfd_section_vma (dll_bfd, lowest_sect);
1576 bfd_map_over_sections (dll_bfd, &map_single_dll_code_section, (void *) (&map_args));
1583 core_section_load_dll_symbols (bfd * abfd, asection * sect, void *obj)
1585 struct target_ops *target = (struct target_ops *) obj;
1590 char *dll_name = NULL;
1592 struct win32_pstatus *pstatus;
1595 if (strncmp (sect->name, ".module", 7))
1598 buf = (char *) xmalloc (sect->_raw_size + 1);
1601 printf_unfiltered ("memory allocation failed for %s\n", sect->name);
1604 if (!bfd_get_section_contents (abfd, sect, buf, 0, sect->_raw_size))
1607 pstatus = (struct win32_pstatus *) buf;
1609 memmove (&base_addr, &(pstatus->data.module_info.base_address), sizeof (base_addr));
1610 dll_name_size = pstatus->data.module_info.module_name_size;
1611 if (offsetof (struct win32_pstatus, data.module_info.module_name) + dll_name_size > sect->_raw_size)
1614 dll_name = (char *) xmalloc (dll_name_size + 1);
1617 printf_unfiltered ("memory allocation failed for %s\n", sect->name);
1620 strncpy (dll_name, pstatus->data.module_info.module_name, dll_name_size);
1622 while ((p = strchr (dll_name, '\\')))
1625 if (!core_dll_symbols_add (dll_name, (DWORD) base_addr))
1626 printf_unfiltered ("%s: Failed to load dll symbols.\n", dll_name);
1628 if (!dll_code_sections_add (dll_name, (DWORD) base_addr + 0x1000, target))
1629 printf_unfiltered ("%s: Failed to map dll code sections.\n", dll_name);
1640 child_solib_add (char *filename ATTRIBUTE_UNUSED, int from_tty ATTRIBUTE_UNUSED, struct target_ops *target)
1644 child_clear_solibs ();
1645 bfd_map_over_sections (core_bfd, &core_section_load_dll_symbols, target);
1649 if (solib_end && solib_end->name)
1650 solib_symbols_add (solib_end->name, solib_end->load_addr);
1655 fetch_elf_core_registers (char *core_reg_sect,
1656 unsigned core_reg_size,
1661 if (core_reg_size < sizeof (CONTEXT))
1663 error ("Core file register section too small (%u bytes).", core_reg_size);
1666 for (r = 0; r < NUM_REGS; r++)
1667 supply_register (r, core_reg_sect + mappings[r]);
1670 static struct core_fns win32_elf_core_fns =
1672 bfd_target_elf_flavour,
1673 default_check_format,
1674 default_core_sniffer,
1675 fetch_elf_core_registers,
1680 _initialize_core_win32 (void)
1682 add_core_fns (&win32_elf_core_fns);