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diff --git a/gdb/windows-nat.c b/gdb/windows-nat.c
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+/* Target-vector operations for controlling win32 child processes, for GDB.
+ Copyright 1995, 1996, 1997, 1998 Free Software Foundation, Inc.
+ Contributed by Cygnus Support.
+
+ This file is part of GDB.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without eve nthe implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+*/
+
+/* by Steve Chamberlain, sac@cygnus.com */
+
+/* We assume we're being built with and will be used for cygwin. */
+
+#include "defs.h"
+#include "frame.h" /* required by inferior.h */
+#include "inferior.h"
+#include "target.h"
+#include "wait.h"
+#include "gdbcore.h"
+#include "command.h"
+#include <signal.h>
+#include <sys/types.h>
+#include <fcntl.h>
+#include <stdlib.h>
+
+#ifdef _MSC_VER
+#include "windefs.h"
+#else /* other WIN32 compiler */
+#include <windows.h>
+#endif
+
+#include "buildsym.h"
+#include "symfile.h"
+#include "objfiles.h"
+#include "gdb_string.h"
+#include "gdbthread.h"
+#include "gdbcmd.h"
+#include <sys/param.h>
+#include <unistd.h>
+
+/* The string sent by cygwin when it processes a signal.
+ FIXME: This should be in a cygwin include file. */
+#define CYGWIN_SIGNAL_STRING "cygwin: signal"
+
+#define CHECK(x) check (x, __FILE__,__LINE__)
+#define DEBUG_EXEC(x) if (debug_exec) printf x
+#define DEBUG_EVENTS(x) if (debug_events) printf x
+#define DEBUG_MEM(x) if (debug_memory) printf x
+#define DEBUG_EXCEPT(x) if (debug_exceptions) printf x
+
+/* Forward declaration */
+extern struct target_ops child_ops;
+
+static void child_stop PARAMS ((void));
+static int win32_child_thread_alive PARAMS ((int));
+
+static int last_sig = 0; /* Set if a signal was received from the
+ debugged process */
+
+/* Thread information structure used to track information that is
+ not available in gdb's thread structure. */
+typedef struct thread_info_struct
+{
+ struct thread_info_struct *next;
+ DWORD id;
+ HANDLE h;
+ char *name;
+ int suspend_count;
+ CONTEXT context;
+} thread_info;
+
+static thread_info thread_head = {NULL};
+
+/* The process and thread handles for the above context. */
+
+static DEBUG_EVENT current_event; /* The current debug event from
+ WaitForDebugEvent */
+static HANDLE current_process_handle; /* Currently executing process */
+static thread_info *current_thread; /* Info on currently selected thread */
+static DWORD main_thread_id; /* Thread ID of the main thread */
+
+/* Counts of things. */
+static int exception_count = 0;
+static int event_count = 0;
+
+/* User options. */
+static int new_console = 0;
+static int new_group = 0;
+static int debug_exec = 0; /* show execution */
+static int debug_events = 0; /* show events from kernel */
+static int debug_memory = 0; /* show target memory accesses */
+static int debug_exceptions = 0; /* show target exceptions */
+
+/* This vector maps GDB's idea of a register's number into an address
+ in the win32 exception context vector.
+
+ It also contains the bit mask needed to load the register in question.
+
+ One day we could read a reg, we could inspect the context we
+ already have loaded, if it doesn't have the bit set that we need,
+ we read that set of registers in using GetThreadContext. If the
+ context already contains what we need, we just unpack it. Then to
+ write a register, first we have to ensure that the context contains
+ the other regs of the group, and then we copy the info in and set
+ out bit. */
+
+#define context_offset(x) ((int)&(((CONTEXT *)NULL)->x))
+static const int mappings[] =
+{
+ context_offset(Eax),
+ context_offset(Ecx),
+ context_offset(Edx),
+ context_offset(Ebx),
+ context_offset(Esp),
+ context_offset(Ebp),
+ context_offset(Esi),
+ context_offset(Edi),
+ context_offset(Eip),
+ context_offset(EFlags),
+ context_offset(SegCs),
+ context_offset(SegSs),
+ context_offset(SegDs),
+ context_offset(SegEs),
+ context_offset(SegFs),
+ context_offset(SegGs),
+ context_offset(FloatSave.RegisterArea[0 * 10]),
+ context_offset(FloatSave.RegisterArea[1 * 10]),
+ context_offset(FloatSave.RegisterArea[2 * 10]),
+ context_offset(FloatSave.RegisterArea[3 * 10]),
+ context_offset(FloatSave.RegisterArea[4 * 10]),
+ context_offset(FloatSave.RegisterArea[5 * 10]),
+ context_offset(FloatSave.RegisterArea[6 * 10]),
+ context_offset(FloatSave.RegisterArea[7 * 10]),
+};
+
+/* This vector maps the target's idea of an exception (extracted
+ from the DEBUG_EVENT structure) to GDB's idea. */
+
+struct xlate_exception
+ {
+ int them;
+ enum target_signal us;
+ };
+
+static const struct xlate_exception
+ xlate[] =
+{
+ {EXCEPTION_ACCESS_VIOLATION, TARGET_SIGNAL_SEGV},
+ {STATUS_STACK_OVERFLOW, TARGET_SIGNAL_SEGV},
+ {EXCEPTION_BREAKPOINT, TARGET_SIGNAL_TRAP},
+ {DBG_CONTROL_C, TARGET_SIGNAL_INT},
+ {EXCEPTION_SINGLE_STEP, TARGET_SIGNAL_TRAP},
+ {-1, -1}};
+
+/* Find a thread record given a thread id.
+ If get_context then also retrieve the context for this
+ thread. */
+static thread_info *
+thread_rec (DWORD id, int get_context)
+{
+ thread_info *th;
+
+ for (th = &thread_head; (th = th->next) != NULL; )
+ if (th->id == id)
+ {
+ if (!th->suspend_count && get_context)
+ {
+ if (get_context > 0)
+ th->suspend_count = SuspendThread (th->h) + 1;
+ else if (get_context < 0)
+ th->suspend_count = -1;
+
+ th->context.ContextFlags = CONTEXT_DEBUGGER;
+ GetThreadContext (th->h, &th->context);
+ }
+ return th;
+ }
+
+ return NULL;
+}
+
+/* Add a thread to the thread list */
+static thread_info *
+child_add_thread(DWORD id, HANDLE h)
+{
+ thread_info *th;
+
+ if ((th = thread_rec (id, FALSE)))
+ return th;
+
+ th = (thread_info *) xmalloc (sizeof (*th));
+ memset(th, 0, sizeof (*th));
+ th->id = id;
+ th->h = h;
+ th->next = thread_head.next;
+ thread_head.next = th;
+ add_thread (id);
+ return th;
+}
+
+/* Clear out any old thread list and reintialize it to a
+ pristine state. */
+static void
+child_init_thread_list ()
+{
+ thread_info *th = &thread_head;
+
+ DEBUG_EVENTS (("gdb: child_init_thread_list\n"));
+ init_thread_list ();
+ while (th->next != NULL)
+ {
+ thread_info *here = th->next;
+ th->next = here->next;
+ (void) CloseHandle (here->h);
+ free (here);
+ }
+}
+
+/* Delete a thread from the list of threads */
+static void
+child_delete_thread (DWORD id)
+{
+ thread_info *th;
+
+ if (info_verbose)
+ printf_unfiltered ("[Deleting %s]\n", target_pid_to_str (id));
+ delete_thread (id);
+
+ for (th = &thread_head;
+ th->next != NULL && th->next->id != id;
+ th = th->next)
+ continue;
+
+ if (th->next != NULL)
+ {
+ thread_info *here = th->next;
+ th->next = here->next;
+ CloseHandle (here->h);
+ free (here);
+ }
+}
+
+static void
+check (BOOL ok, const char *file, int line)
+{
+ if (!ok)
+ printf_filtered ("error return %s:%d was %d\n", file, line, GetLastError ());
+}
+
+static void
+do_child_fetch_inferior_registers (int r)
+{
+ if (r >= 0)
+ supply_register (r, ((char *) &current_thread->context) + mappings[r]);
+ else
+ {
+ for (r = 0; r < NUM_REGS; r++)
+ do_child_fetch_inferior_registers (r);
+ }
+}
+
+static void
+child_fetch_inferior_registers (int r)
+{
+ current_thread = thread_rec (inferior_pid, TRUE);
+ do_child_fetch_inferior_registers (r);
+}
+
+static void
+do_child_store_inferior_registers (int r)
+{
+ if (r >= 0)
+ read_register_gen (r, ((char *) &current_thread->context) + mappings[r]);
+ else
+ {
+ for (r = 0; r < NUM_REGS; r++)
+ do_child_store_inferior_registers (r);
+ }
+}
+
+/* Store a new register value into the current thread context */
+static void
+child_store_inferior_registers (int r)
+{
+ current_thread = thread_rec (inferior_pid, TRUE);
+ do_child_store_inferior_registers (r);
+}
+
+/* Wait for child to do something. Return pid of child, or -1 in case
+ of error; store status through argument pointer OURSTATUS. */
+
+static int
+handle_load_dll (PTR dummy)
+{
+ LOAD_DLL_DEBUG_INFO * event = &current_event.u.LoadDll;
+ DWORD dll_name_ptr;
+ DWORD done;
+ char dll_buf[MAX_PATH + 1];
+ char *p, *dll_name = NULL, *dll_basename;
+ struct objfile *objfile;
+ MEMORY_BASIC_INFORMATION minfo;
+
+ dll_buf[0] = dll_buf[sizeof(dll_buf) - 1] = '\0';
+
+ /* The following code attempts to find the name of the dll by reading the
+ name from the processes memory. Unfortunately it doesn't work right.
+ Doing this the "right way" for Windows is very difficult. FIXME */
+#ifdef DOESNT_WORK
+ memset (&minfo, 0, sizeof minfo);
+ if (VirtualQueryEx (current_process_handle, (LPCVOID) event->lpBaseOfDll,
+ &minfo, sizeof(minfo)) && minfo.BaseAddress) {
+ DWORD len;
+ IMAGE_DOS_HEADER *hmm0 = (IMAGE_DOS_HEADER *) minfo.BaseAddress;
+ HMODULE hmm = (HMODULE) (((DWORD) hmm0) + hmm0->e_lfanew);
+
+ if ((len = GetModuleFileName (hmm, dll_buf, MAX_PATH)))
+ {
+ dll_name = dll_buf;
+ dll_name[len] = '\0';
+ }
+ }
+#endif
+
+ /* Attempt to read the name of the dll that was detected.
+ This is documented to work only when actively debugging
+ a program. It will not work for attached processes. */
+ if (dll_name == NULL || *dll_name == '\0')
+ {
+ int size = event->fUnicode ? sizeof (WCHAR) : sizeof (char);
+ int len = 0;
+ char b[2];
+
+ ReadProcessMemory (current_process_handle,
+ (LPCVOID) event->lpImageName,
+ (char *) &dll_name_ptr,
+ sizeof (dll_name_ptr), &done);
+
+ /* See if we could read the address of a string, and that the
+ address isn't null. */
+
+ if (done != sizeof (dll_name_ptr) || !dll_name_ptr)
+ return 1;
+
+ do
+ {
+ ReadProcessMemory (current_process_handle,
+ (LPCVOID) (dll_name_ptr + len * size),
+ &b,
+ size,
+ &done);
+ len++;
+ }
+ while ((b[0] != 0 || b[size - 1] != 0) && done == size);
+
+ dll_name = alloca (len);
+
+ if (event->fUnicode)
+ {
+ WCHAR *unicode_dll_name = (WCHAR *) alloca (len * sizeof (WCHAR));
+ ReadProcessMemory (current_process_handle,
+ (LPCVOID) dll_name_ptr,
+ unicode_dll_name,
+ len * sizeof (WCHAR),
+ &done);
+
+ WideCharToMultiByte (CP_ACP, 0,
+ unicode_dll_name, len,
+ dll_name, len, 0, 0);
+ }
+ else
+ {
+ ReadProcessMemory (current_process_handle,
+ (LPCVOID) dll_name_ptr,
+ dll_name,
+ len,
+ &done);
+ }
+ }
+
+ if (!dll_name)
+ return 1;
+
+ while ((p = strchr (dll_name, '\\')))
+ *p = '/';
+
+ /* FIXME!! It would be nice to define one symbol which pointed to the
+ front of the dll if we can't find any symbols. */
+
+ if (!(dll_basename = strrchr(dll_name, '/')))
+ dll_basename = dll_name;
+ else
+ dll_basename++;
+
+ ALL_OBJFILES(objfile)
+ {
+ char *objfile_basename;
+ objfile_basename = strrchr(objfile->name, '/');
+
+ if (objfile_basename &&
+ strcmp(dll_basename, objfile_basename + 1) == 0)
+ {
+ printf_unfiltered ("%x:%s (symbols previously loaded)\n",
+ event->lpBaseOfDll, dll_name);
+ goto out;
+ }
+ }
+
+ /* The symbols in a dll are offset by 0x1000, which is the
+ the offset from 0 of the first byte in an image - because
+ of the file header and the section alignment.
+
+ FIXME: Is this the real reason that we need the 0x1000 ? */
+
+ printf_unfiltered ("%x:%s", event->lpBaseOfDll, dll_name);
+ symbol_file_add (dll_name, 0, (int) event->lpBaseOfDll + 0x1000, 0, 0, 0, 0, 1);
+ printf_unfiltered ("\n");
+
+out:
+ return 1;
+}
+
+/* Handle DEBUG_STRING output from child process.
+ Cygwin prepends its messages with a "cygwin:". Interpret this as
+ a Cygwin signal. Otherwise just print the string as a warning. */
+static int
+handle_output_debug_string (struct target_waitstatus *ourstatus)
+{
+ char *s;
+ int gotasig = FALSE;
+
+ if (!target_read_string
+ ((CORE_ADDR) current_event.u.DebugString.lpDebugStringData, &s, 1024, 0)
+ || !s || !*s)
+ return gotasig;
+
+ if (strncmp(s, CYGWIN_SIGNAL_STRING, sizeof(CYGWIN_SIGNAL_STRING) - 1))
+ {
+ warning (s);
+ }
+ else
+ {
+ char *p;
+ /*last_sig = */strtol(s + sizeof(CYGWIN_SIGNAL_STRING) - 1, &p, 0);
+ if (gotasig = (ourstatus->value.sig = target_signal_from_host (last_sig)))
+ ourstatus->kind = TARGET_WAITKIND_STOPPED;
+ }
+
+ free (s);
+ return gotasig;
+}
+
+static int
+handle_exception (struct target_waitstatus *ourstatus)
+{
+ int i;
+ int done = 0;
+ thread_info *th;
+
+ ourstatus->kind = TARGET_WAITKIND_STOPPED;
+
+ /* Record the context of the current thread */
+ th = thread_rec (current_event.dwThreadId, -1);
+
+ switch (current_event.u.Exception.ExceptionRecord.ExceptionCode)
+ {
+ case EXCEPTION_ACCESS_VIOLATION:
+ DEBUG_EXCEPT (("gdb: Target exception ACCESS_VIOLATION at 0x%08x\n",
+ current_event.u.Exception.ExceptionRecord.ExceptionAddress));
+ ourstatus->value.sig = TARGET_SIGNAL_SEGV;
+ break;
+ case STATUS_STACK_OVERFLOW:
+ DEBUG_EXCEPT (("gdb: Target exception STACK_OVERFLOW at 0x%08x\n",
+ current_event.u.Exception.ExceptionRecord.ExceptionAddress));
+ ourstatus->value.sig = TARGET_SIGNAL_SEGV;
+ break;
+ case EXCEPTION_BREAKPOINT:
+ DEBUG_EXCEPT (("gdb: Target exception BREAKPOINT at 0x%08x\n",
+ current_event.u.Exception.ExceptionRecord.ExceptionAddress));
+ ourstatus->value.sig = TARGET_SIGNAL_TRAP;
+ break;
+ case DBG_CONTROL_C:
+ DEBUG_EXCEPT (("gdb: Target exception CONTROL_C at 0x%08x\n",
+ current_event.u.Exception.ExceptionRecord.ExceptionAddress));
+ ourstatus->value.sig = TARGET_SIGNAL_INT;
+ /* User typed CTRL-C. Continue with this status */
+ last_sig = SIGINT; /* FIXME - should check pass state */
+ break;
+ case EXCEPTION_SINGLE_STEP:
+ DEBUG_EXCEPT (("gdb: Target exception SINGLE_STEP at 0x%08x\n",
+ current_event.u.Exception.ExceptionRecord.ExceptionAddress));
+ ourstatus->value.sig = TARGET_SIGNAL_TRAP;
+ break;
+ default:
+ /* This may be a structured exception handling exception. In
+ that case, we want to let the program try to handle it, and
+ only break if we see the exception a second time. */
+ if (current_event.u.Exception.dwFirstChance)
+ return 0;
+
+ printf_unfiltered ("gdb: unknown target exception 0x%08x at 0x%08x\n",
+ current_event.u.Exception.ExceptionRecord.ExceptionCode,
+ current_event.u.Exception.ExceptionRecord.ExceptionAddress);
+ ourstatus->value.sig = TARGET_SIGNAL_UNKNOWN;
+ break;
+ }
+ exception_count++;
+ return 1;
+}
+
+/* Resume all artificially suspended threads if we are continuing
+ execution */
+static BOOL
+child_continue (DWORD continue_status, int id)
+{
+ int i;
+ thread_info *th;
+ BOOL res;
+
+ DEBUG_EVENTS (("ContinueDebugEvent (cpid=%d, ctid=%d, DBG_CONTINUE);\n",
+ current_event.dwProcessId, current_event.dwThreadId));
+ if (res = ContinueDebugEvent (current_event.dwProcessId,
+ current_event.dwThreadId,
+ continue_status))
+ for (th = &thread_head; (th = th->next) != NULL; )
+ if (((id == -1) || (id == th->id)) && th->suspend_count)
+ {
+ for (i = 0; i < th->suspend_count; i++)
+ (void) ResumeThread (th->h);
+ th->suspend_count = 0;
+ }
+
+ return res;
+}
+
+static int
+child_wait (int pid, struct target_waitstatus *ourstatus)
+{
+ /* We loop when we get a non-standard exception rather than return
+ with a SPURIOUS because resume can try and step or modify things,
+ which needs a current_thread->h. But some of these exceptions mark
+ the birth or death of threads, which mean that the current thread
+ isn't necessarily what you think it is. */
+
+ while (1)
+ {
+ DWORD continue_status;
+ BOOL t = WaitForDebugEvent (&current_event, INFINITE);
+ char *p;
+ thread_info *th;
+ int sig;
+
+ event_count++;
+
+ continue_status = DBG_CONTINUE;
+
+ switch (current_event.dwDebugEventCode)
+ {
+ case CREATE_THREAD_DEBUG_EVENT:
+ DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%x code=%s)\n",
+ current_event.dwProcessId, current_event.dwThreadId,
+ "CREATE_THREAD_DEBUG_EVENT"));
+ /* Record the existence of this thread */
+ child_add_thread (current_event.dwThreadId,
+ current_event.u.CreateThread.hThread);
+ if (info_verbose)
+ printf_unfiltered ("[New %s]\n",
+ target_pid_to_str (current_event.dwThreadId));
+ break;
+
+ case EXIT_THREAD_DEBUG_EVENT:
+ DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n",
+ current_event.dwProcessId, current_event.dwThreadId,
+ "EXIT_THREAD_DEBUG_EVENT"));
+ child_delete_thread (current_event.dwThreadId);
+ break;
+
+ case CREATE_PROCESS_DEBUG_EVENT:
+ DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n",
+ current_event.dwProcessId, current_event.dwThreadId,
+ "CREATE_PROCESS_DEBUG_EVENT"));
+ current_process_handle = current_event.u.CreateProcessInfo.hProcess;
+
+ main_thread_id = inferior_pid = current_event.dwThreadId;
+ /* Add the main thread */
+ current_thread = child_add_thread (inferior_pid,
+ current_event.u.CreateProcessInfo.hThread);
+ break;
+
+ case EXIT_PROCESS_DEBUG_EVENT:
+ DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n",
+ current_event.dwProcessId, current_event.dwThreadId,
+ "EXIT_PROCESS_DEBUG_EVENT"));
+ ourstatus->kind = TARGET_WAITKIND_EXITED;
+ ourstatus->value.integer = current_event.u.ExitProcess.dwExitCode;
+ CloseHandle (current_process_handle);
+ return current_event.dwProcessId;
+ break;
+
+ case LOAD_DLL_DEBUG_EVENT:
+ DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n",
+ current_event.dwProcessId, current_event.dwThreadId,
+ "LOAD_DLL_DEBUG_EVENT"));
+ catch_errors (handle_load_dll, NULL, "", RETURN_MASK_ALL);
+ registers_changed(); /* mark all regs invalid */
+ break;
+
+ case UNLOAD_DLL_DEBUG_EVENT:
+ DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n",
+ current_event.dwProcessId, current_event.dwThreadId,
+ "UNLOAD_DLL_DEBUG_EVENT"));
+ break; /* FIXME: don't know what to do here */
+
+ case EXCEPTION_DEBUG_EVENT:
+ DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n",
+ current_event.dwProcessId, current_event.dwThreadId,
+ "EXCEPTION_DEBUG_EVENT"));
+ if (handle_exception (ourstatus))
+ return current_event.dwThreadId;
+ continue_status = DBG_EXCEPTION_NOT_HANDLED;
+ break;
+
+ case OUTPUT_DEBUG_STRING_EVENT: /* message from the kernel */
+ DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n",
+ current_event.dwProcessId, current_event.dwThreadId,
+ "OUTPUT_DEBUG_STRING_EVENT"));
+ if (handle_output_debug_string (ourstatus))
+ return main_thread_id;
+ break;
+ default:
+ printf_unfiltered ("gdb: kernel event for pid=%d tid=%d\n",
+ current_event.dwProcessId,
+ current_event.dwThreadId);
+ printf_unfiltered (" unknown event code %d\n",
+ current_event.dwDebugEventCode);
+ break;
+ }
+
+ CHECK (child_continue (continue_status, -1));
+ }
+}
+
+/* Attach to process PID, then initialize for debugging it. */
+
+static void
+child_attach (args, from_tty)
+ char *args;
+ int from_tty;
+{
+ BOOL ok;
+
+ if (!args)
+ error_no_arg ("process-id to attach");
+
+ current_event.dwProcessId = strtoul (args, 0, 0);
+
+ ok = DebugActiveProcess (current_event.dwProcessId);
+
+ if (!ok)
+ error ("Can't attach to process.");
+
+ exception_count = 0;
+ event_count = 0;
+
+ if (from_tty)
+ {
+ char *exec_file = (char *) get_exec_file (0);
+
+ if (exec_file)
+ printf_unfiltered ("Attaching to program `%s', %s\n", exec_file,
+ target_pid_to_str (current_event.dwProcessId));
+ else
+ printf_unfiltered ("Attaching to %s\n",
+ target_pid_to_str (current_event.dwProcessId));
+
+ gdb_flush (gdb_stdout);
+ }
+
+ push_target (&child_ops);
+}
+
+static void
+child_detach (args, from_tty)
+ char *args;
+ int from_tty;
+{
+ if (from_tty)
+ {
+ char *exec_file = get_exec_file (0);
+ if (exec_file == 0)
+ exec_file = "";
+ printf_unfiltered ("Detaching from program: %s %s\n", exec_file,
+ target_pid_to_str (inferior_pid));
+ gdb_flush (gdb_stdout);
+ }
+ inferior_pid = 0;
+ unpush_target (&child_ops);
+}
+
+/* Print status information about what we're accessing. */
+
+static void
+child_files_info (ignore)
+ struct target_ops *ignore;
+{
+ printf_unfiltered ("\tUsing the running image of %s %s.\n",
+ attach_flag ? "attached" : "child", target_pid_to_str (inferior_pid));
+}
+
+/* ARGSUSED */
+static void
+child_open (arg, from_tty)
+ char *arg;
+ int from_tty;
+{
+ error ("Use the \"run\" command to start a Unix child process.");
+}
+
+/* Start an inferior win32 child process and sets inferior_pid to its pid.
+ EXEC_FILE is the file to run.
+ ALLARGS is a string containing the arguments to the program.
+ ENV is the environment vector to pass. Errors reported with error(). */
+
+static void
+child_create_inferior (exec_file, allargs, env)
+ char *exec_file;
+ char *allargs;
+ char **env;
+{
+ char real_path[MAXPATHLEN];
+ char *winenv;
+ char *temp;
+ int envlen;
+ int i;
+
+ STARTUPINFO si;
+ PROCESS_INFORMATION pi;
+ struct target_waitstatus dummy;
+ BOOL ret;
+ DWORD flags;
+ char *args;
+
+ if (!exec_file)
+ {
+ error ("No executable specified, use `target exec'.\n");
+ }
+
+ memset (&si, 0, sizeof (si));
+ si.cb = sizeof (si);
+
+ cygwin32_conv_to_win32_path (exec_file, real_path);
+
+ flags = DEBUG_ONLY_THIS_PROCESS;
+
+ if (new_group)
+ flags |= CREATE_NEW_PROCESS_GROUP;
+
+ if (new_console)
+ flags |= CREATE_NEW_CONSOLE;
+
+ args = alloca (strlen (real_path) + strlen (allargs) + 2);
+
+ strcpy (args, real_path);
+
+ strcat (args, " ");
+ strcat (args, allargs);
+
+ /* Prepare the environment vars for CreateProcess. */
+ {
+ /* This code use to assume all env vars were file names and would
+ translate them all to win32 style. That obviously doesn't work in the
+ general case. The current rule is that we only translate PATH.
+ We need to handle PATH because we're about to call CreateProcess and
+ it uses PATH to find DLL's. Fortunately PATH has a well-defined value
+ in both posix and win32 environments. cygwin.dll will change it back
+ to posix style if necessary. */
+
+ static const char *conv_path_names[] =
+ {
+ "PATH=",
+ 0
+ };
+
+ /* CreateProcess takes the environment list as a null terminated set of
+ strings (i.e. two nulls terminate the list). */
+
+ /* Get total size for env strings. */
+ for (envlen = 0, i = 0; env[i] && *env[i]; i++)
+ {
+ int j, len;
+
+ for (j = 0; conv_path_names[j]; j++)
+ {
+ len = strlen (conv_path_names[j]);
+ if (strncmp (conv_path_names[j], env[i], len) == 0)
+ {
+ if (cygwin32_posix_path_list_p (env[i] + len))
+ envlen += len
+ + cygwin32_posix_to_win32_path_list_buf_size (env[i] + len);
+ else
+ envlen += strlen (env[i]) + 1;
+ break;
+ }
+ }
+ if (conv_path_names[j] == NULL)
+ envlen += strlen (env[i]) + 1;
+ }
+
+ winenv = alloca (envlen + 1);
+
+ /* Copy env strings into new buffer. */
+ for (temp = winenv, i = 0; env[i] && *env[i]; i++)
+ {
+ int j, len;
+
+ for (j = 0; conv_path_names[j]; j++)
+ {
+ len = strlen (conv_path_names[j]);
+ if (strncmp (conv_path_names[j], env[i], len) == 0)
+ {
+ if (cygwin32_posix_path_list_p (env[i] + len))
+ {
+ memcpy (temp, env[i], len);
+ cygwin32_posix_to_win32_path_list (env[i] + len, temp + len);
+ }
+ else
+ strcpy (temp, env[i]);
+ break;
+ }
+ }
+ if (conv_path_names[j] == NULL)
+ strcpy (temp, env[i]);
+
+ temp += strlen (temp) + 1;
+ }
+
+ /* Final nil string to terminate new env. */
+ *temp = 0;
+ }
+
+ ret = CreateProcess (0,
+ args, /* command line */
+ NULL, /* Security */
+ NULL, /* thread */
+ TRUE, /* inherit handles */
+ flags, /* start flags */
+ winenv,
+ NULL, /* current directory */
+ &si,
+ &pi);
+ if (!ret)
+ error ("Error creating process %s, (error %d)\n", exec_file, GetLastError());
+
+ exception_count = 0;
+ event_count = 0;
+
+ current_process_handle = pi.hProcess;
+ current_event.dwProcessId = pi.dwProcessId;
+ memset (&current_event, 0, sizeof (current_event));
+ inferior_pid = current_event.dwThreadId = pi.dwThreadId;
+ push_target (&child_ops);
+ child_init_thread_list ();
+ init_wait_for_inferior ();
+ clear_proceed_status ();
+ target_terminal_init ();
+ target_terminal_inferior ();
+
+ /* Ignore the first trap */
+ child_wait (inferior_pid, &dummy);
+
+ proceed ((CORE_ADDR) - 1, TARGET_SIGNAL_0, 0);
+}
+
+static void
+child_mourn_inferior ()
+{
+ (void) child_continue (DBG_CONTINUE, -1);
+ unpush_target (&child_ops);
+ generic_mourn_inferior ();
+}
+
+/* Send a SIGINT to the process group. This acts just like the user typed a
+ ^C on the controlling terminal. */
+
+static void
+child_stop ()
+{
+ DEBUG_EVENTS (("gdb: GenerateConsoleCtrlEvent (CTRLC_EVENT, 0)\n"));
+ CHECK (GenerateConsoleCtrlEvent (CTRL_C_EVENT, 0));
+ registers_changed(); /* refresh register state */
+}
+
+int
+child_xfer_memory (CORE_ADDR memaddr, char *our, int len,
+ int write, struct target_ops *target)
+{
+ DWORD done;
+ if (write)
+ {
+ DEBUG_MEM (("gdb: write target memory, %d bytes at 0x%08x\n",
+ len, memaddr));
+ WriteProcessMemory (current_process_handle, (LPVOID) memaddr, our,
+ len, &done);
+ FlushInstructionCache (current_process_handle, (LPCVOID) memaddr, len);
+ }
+ else
+ {
+ DEBUG_MEM (("gdb: read target memory, %d bytes at 0x%08x\n",
+ len, memaddr));
+ ReadProcessMemory (current_process_handle, (LPCVOID) memaddr, our, len,
+ &done);
+ }
+ return done;
+}
+
+void
+child_kill_inferior (void)
+{
+ CHECK (TerminateProcess (current_process_handle, 0));
+
+ for (;;)
+ {
+ if (!child_continue (DBG_CONTINUE, -1))
+ break;
+ if (!WaitForDebugEvent (&current_event, INFINITE))
+ break;
+ if (current_event.dwDebugEventCode == EXIT_PROCESS_DEBUG_EVENT)
+ break;
+ }
+
+ CHECK (CloseHandle (current_process_handle));
+
+ /* this may fail in an attached process so don't check. */
+ (void) CloseHandle (current_thread->h);
+ target_mourn_inferior(); /* or just child_mourn_inferior? */
+}
+
+void
+child_resume (int pid, int step, enum target_signal sig)
+{
+ int i;
+ thread_info *th;
+ DWORD continue_status = last_sig > 0 && last_sig < NSIG ?
+ DBG_EXCEPTION_NOT_HANDLED : DBG_CONTINUE;
+
+ DEBUG_EXEC (("gdb: child_resume (pid=%d, step=%d, sig=%d);\n",
+ pid, step, sig));
+
+ /* Get context for currently selected thread */
+ th = thread_rec (current_event.dwThreadId, FALSE);
+ if (step)
+ {
+#ifdef i386
+ /* Single step by setting t bit */
+ child_fetch_inferior_registers (PS_REGNUM);
+ th->context.EFlags |= FLAG_TRACE_BIT;
+#endif
+ }
+
+ if (th->context.ContextFlags)
+ {
+ CHECK (SetThreadContext (th->h, &th->context));
+ th->context.ContextFlags = 0;
+ }
+
+ /* Allow continuing with the same signal that interrupted us.
+ Otherwise complain. */
+ if (sig && sig != last_sig)
+ fprintf_unfiltered (gdb_stderr, "Can't send signals to the child. signal %d\n", sig);
+
+ last_sig = 0;
+ child_continue (continue_status, pid);
+}
+
+static void
+child_prepare_to_store ()
+{
+ /* Do nothing, since we can store individual regs */
+}
+
+static int
+child_can_run ()
+{
+ return 1;
+}
+
+static void
+child_close ()
+{
+ DEBUG_EVENTS (("gdb: child_close, inferior_pid=%d\n", inferior_pid));
+}
+
+struct target_ops child_ops ;
+
+static void
+init_child_ops(void)
+{
+ child_ops.to_shortname = "child";
+ child_ops.to_longname = "Win32 child process";
+ child_ops.to_doc = "Win32 child process (started by the \"run\" command).";
+ child_ops.to_open = child_open;
+ child_ops.to_close = child_close;
+ child_ops.to_attach = child_attach;
+ child_ops.to_detach = child_detach;
+ child_ops.to_resume = child_resume;
+ child_ops.to_wait = child_wait;
+ child_ops.to_fetch_registers = child_fetch_inferior_registers;
+ child_ops.to_store_registers = child_store_inferior_registers;
+ child_ops.to_prepare_to_store = child_prepare_to_store;
+ child_ops.to_xfer_memory = child_xfer_memory;
+ child_ops.to_files_info = child_files_info;
+ child_ops.to_insert_breakpoint = memory_insert_breakpoint;
+ child_ops.to_remove_breakpoint = memory_remove_breakpoint;
+ child_ops.to_terminal_init = terminal_init_inferior;
+ child_ops.to_terminal_inferior = terminal_inferior;
+ child_ops.to_terminal_ours_for_output = terminal_ours_for_output;
+ child_ops.to_terminal_ours = terminal_ours;
+ child_ops.to_terminal_info = child_terminal_info;
+ child_ops.to_kill = child_kill_inferior;
+ child_ops.to_load = 0;
+ child_ops.to_lookup_symbol = 0;
+ child_ops.to_create_inferior = child_create_inferior;
+ child_ops.to_mourn_inferior = child_mourn_inferior;
+ child_ops.to_can_run = child_can_run;
+ child_ops.to_notice_signals = 0;
+ child_ops.to_thread_alive = win32_child_thread_alive;
+ child_ops.to_stop = child_stop;
+ child_ops.to_stratum = process_stratum;
+ child_ops.DONT_USE = 0;
+ child_ops.to_has_all_memory = 1;
+ child_ops.to_has_memory = 1;
+ child_ops.to_has_stack = 1;
+ child_ops.to_has_registers = 1;
+ child_ops.to_has_execution = 1;
+ child_ops.to_sections = 0;
+ child_ops.to_sections_end = 0;
+ child_ops.to_magic = OPS_MAGIC;
+}
+
+void
+_initialize_inftarg ()
+{
+ struct cmd_list_element *c;
+ init_child_ops() ;
+
+ add_show_from_set
+ (add_set_cmd ("new-console", class_support, var_boolean,
+ (char *) &new_console,
+ "Set creation of new console when creating child process.",
+ &setlist),
+ &showlist);
+
+ add_show_from_set
+ (add_set_cmd ("new-group", class_support, var_boolean,
+ (char *) &new_group,
+ "Set creation of new group when creating child process.",
+ &setlist),
+ &showlist);
+
+ add_show_from_set
+ (add_set_cmd ("debugexec", class_support, var_boolean,
+ (char *) &debug_exec,
+ "Set whether to display execution in child process.",
+ &setlist),
+ &showlist);
+
+ add_show_from_set
+ (add_set_cmd ("debugevents", class_support, var_boolean,
+ (char *) &debug_events,
+ "Set whether to display kernel events in child process.",
+ &setlist),
+ &showlist);
+
+ add_show_from_set
+ (add_set_cmd ("debugmemory", class_support, var_boolean,
+ (char *) &debug_memory,
+ "Set whether to display memory accesses in child process.",
+ &setlist),
+ &showlist);
+
+ add_show_from_set
+ (add_set_cmd ("debugexceptions", class_support, var_boolean,
+ (char *) &debug_exceptions,
+ "Set whether to display kernel exceptions in child process.",
+ &setlist),
+ &showlist);
+
+ add_target (&child_ops);
+}
+
+/* Determine if the thread referenced by "pid" is alive
+ by "polling" it. If WaitForSingleObject returns WAIT_OBJECT_0
+ it means that the pid has died. Otherwise it is assumed to be alive. */
+static int
+win32_child_thread_alive (int pid)
+{
+ return WaitForSingleObject(thread_rec (pid, FALSE)->h, 0) == WAIT_OBJECT_0 ?
+ FALSE : TRUE;
+}
+
+/* Convert pid to printable format. */
+char *
+cygwin_pid_to_str (int pid)
+{
+ static char buf[80];
+ if (pid == current_event.dwProcessId)
+ sprintf (buf, "process %d", pid);
+ else
+ sprintf (buf, "thread %d.0x%x", current_event.dwProcessId, pid);
+ return buf;
+}