-/* Target-vector operations for controlling win32 child processes, for GDB.
- Copyright 1996
- 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 */
-
-#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 <windows.h>
-#include "buildsym.h"
-#include "gdb_string.h"
-#include "thread.h"
-#include "gdbcmd.h"
-
-#define CHECK(x) check (x, __FILE__,__LINE__)
-#define DEBUG(x) if (remote_debug) printf x
-
-
-/* Forward declaration */
-extern struct target_ops child_ops;
-
-/* The most recently read context. Inspect ContextFlags to see what
- bits are valid. */
-
-static CONTEXT context;
-
-/* The process and thread handles for the above context. */
-
-static HANDLE current_process;
-static HANDLE current_thread;
-static int current_process_id;
-static int current_thread_id;
-
-/* 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;
-
-/* 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. */
-
-struct regmappings
- {
- char *incontext;
- int mask;
- };
-
-static const struct regmappings
- mappings[] =
-{
- {(char *) &context.Eax, CONTEXT_INTEGER},
- {(char *) &context.Ecx, CONTEXT_INTEGER},
- {(char *) &context.Edx, CONTEXT_INTEGER},
- {(char *) &context.Ebx, CONTEXT_INTEGER},
- {(char *) &context.Esp, CONTEXT_CONTROL},
- {(char *) &context.Ebp, CONTEXT_CONTROL},
- {(char *) &context.Esi, CONTEXT_INTEGER},
- {(char *) &context.Edi, CONTEXT_INTEGER},
- {(char *) &context.Eip, CONTEXT_CONTROL},
- {(char *) &context.EFlags, CONTEXT_CONTROL},
- {(char *) &context.SegCs, CONTEXT_SEGMENTS},
- {(char *) &context.SegSs, CONTEXT_SEGMENTS},
- {(char *) &context.SegDs, CONTEXT_SEGMENTS},
- {(char *) &context.SegEs, CONTEXT_SEGMENTS},
- {(char *) &context.SegFs, CONTEXT_SEGMENTS},
- {(char *) &context.SegGs, CONTEXT_SEGMENTS},
- {&context.FloatSave.RegisterArea[0 * 10], CONTEXT_FLOATING_POINT},
- {&context.FloatSave.RegisterArea[1 * 10], CONTEXT_FLOATING_POINT},
- {&context.FloatSave.RegisterArea[2 * 10], CONTEXT_FLOATING_POINT},
- {&context.FloatSave.RegisterArea[3 * 10], CONTEXT_FLOATING_POINT},
- {&context.FloatSave.RegisterArea[4 * 10], CONTEXT_FLOATING_POINT},
- {&context.FloatSave.RegisterArea[5 * 10], CONTEXT_FLOATING_POINT},
- {&context.FloatSave.RegisterArea[6 * 10], CONTEXT_FLOATING_POINT},
- {&context.FloatSave.RegisterArea[7 * 10], CONTEXT_FLOATING_POINT},
-};
-
-
-/* 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},
- {EXCEPTION_BREAKPOINT, TARGET_SIGNAL_TRAP},
- {DBG_CONTROL_C, TARGET_SIGNAL_INT},
- {EXCEPTION_SINGLE_STEP, TARGET_SIGNAL_TRAP},
- {-1, -1}};
-
-
-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
-child_fetch_inferior_registers (int r)
-{
- if (r < 0)
- {
- for (r = 0; r < NUM_REGS; r++)
- child_fetch_inferior_registers (r);
- }
- else
- {
- supply_register (r, mappings[r].incontext);
- }
-}
-
-static void
-child_store_inferior_registers (int r)
-{
- if (r < 0)
- {
- for (r = 0; r < NUM_REGS; r++)
- child_store_inferior_registers (r);
- }
- else
- {
- read_register_gen (r, mappings[r].incontext);
- }
-}
-
-
-/* Wait for child to do something. Return pid of child, or -1 in case
- of error; store status through argument pointer OURSTATUS. */
-
-
-static void
-handle_load_dll (DEBUG_EVENT * event)
-{
- DWORD dll_name_ptr;
- DWORD done;
-
- ReadProcessMemory (current_process,
- (DWORD) event->u.LoadDll.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)
- {
- char *dll_name;
- int size = event->u.LoadDll.fUnicode ? sizeof (WCHAR) : sizeof (char);
- int len = 0;
- char b[2];
- do
- {
- ReadProcessMemory (current_process,
- 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->u.LoadDll.fUnicode)
- {
- WCHAR *unicode_dll_name = (WCHAR *) alloca (len * sizeof (WCHAR));
- ReadProcessMemory (current_process,
- 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,
- dll_name_ptr,
- dll_name,
- len,
- &done);
- }
-
- /* FIXME!! It would be nice to define one symbol which pointed to the
- front of the dll if we can't find any symbols. */
-
- context.ContextFlags = CONTEXT_FULL;
- GetThreadContext (current_thread, &context);
-
- symbol_file_add (dll_name, 0, (int) event->u.LoadDll.lpBaseOfDll, 0, 0, 0);
-
- /* We strip off the path of the dll for tidiness. */
- if (strrchr (dll_name, '\\'))
- dll_name = strrchr (dll_name, '\\') + 1;
- printf_unfiltered ("%x:%s\n", event->u.LoadDll.lpBaseOfDll, dll_name);
- }
-}
-
-
-static void
-handle_exception (DEBUG_EVENT * event, struct target_waitstatus *ourstatus)
-{
- int i;
- int done = 0;
- ourstatus->kind = TARGET_WAITKIND_STOPPED;
-
- for (i = 0; !done && xlate[i].us > 0; i++)
- {
- if (xlate[i].them == event->u.Exception.ExceptionRecord.ExceptionCode)
- {
- ourstatus->value.sig = xlate[i].us;
- done = 1;
- break;
- }
- }
-
- if (!done)
- {
- printf_unfiltered ("Want to know about exception code %08x\n",
- event->u.Exception.ExceptionRecord.ExceptionCode);
- ourstatus->value.sig = TARGET_SIGNAL_UNKNOWN;
- }
- context.ContextFlags = CONTEXT_FULL;
- GetThreadContext (current_thread, &context);
- exception_count++;
-}
-
-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. 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)
- {
- DEBUG_EVENT event;
- BOOL t = WaitForDebugEvent (&event, INFINITE);
-
- DEBUG (("%d = WaitForDebugEvent() code=%d pid=%d tid=%d)\n",
- t,
- event.dwDebugEventCode,
- event.dwProcessId,
- event.dwThreadId));
-
- event_count++;
-
- current_thread_id = event.dwThreadId;
- current_process_id = event.dwProcessId;
-
- switch (event.dwDebugEventCode)
- {
- case CREATE_THREAD_DEBUG_EVENT:
- case EXIT_THREAD_DEBUG_EVENT:
- case CREATE_PROCESS_DEBUG_EVENT:
- break;
-
- case EXIT_PROCESS_DEBUG_EVENT:
- ourstatus->kind = TARGET_WAITKIND_EXITED;
- ourstatus->value.integer = event.u.ExitProcess.dwExitCode;
- CloseHandle (current_process);
- CloseHandle (current_thread);
- return current_process_id;
- break;
-
- case LOAD_DLL_DEBUG_EVENT:
- handle_load_dll (&event);
- break;
- case EXCEPTION_DEBUG_EVENT:
- handle_exception (&event, ourstatus);
- return current_process_id;
- default:
- printf_unfiltered ("waitfor it %d %d %d %d\n", t,
- event.dwDebugEventCode,
- event.dwProcessId,
- event.dwThreadId);
- break;
- }
- CHECK (ContinueDebugEvent (current_process_id,
- current_thread_id,
- DBG_CONTINUE));
- }
-}
-
-
-
-
-/* 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_process_id = strtoul (args, 0, 0);
-
- ok = DebugActiveProcess (current_process_id);
-
- 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_process_id));
- else
- printf_unfiltered ("Attaching to %s\n",
- target_pid_to_str (current_process_id));
-
- gdb_flush (gdb_stdout);
- }
-
- inferior_pid = current_process_id;
- 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.");
-}
-
-/* Stub function which causes the inferior that runs it, to be ptrace-able
- by its parent process. */
-
-
-/* Start an inferior Unix 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;
- STARTUPINFO si;
- PROCESS_INFORMATION pi;
- struct target_waitstatus dummy;
- BOOL ret;
- DWORD flags;
-
- if (!exec_file)
- {
- error ("No executable specified, use `target exec'.\n");
- }
-
- memset (&si, 0, sizeof (si));
- si.cb = sizeof (si);
-
- /* A realpath is always the same size, or a bit shorter than a nice path. */
- real_path = alloca (strlen (exec_file) + 1);
- path_to_real_path (exec_file, real_path);
-
- flags = DEBUG_ONLY_THIS_PROCESS | DEBUG_PROCESS;
-
- if (new_group)
- flags |= CREATE_NEW_PROCESS_GROUP;
-
- if (new_console)
- flags |= CREATE_NEW_CONSOLE;
-
- ret = CreateProcess (real_path,
- allargs,
- NULL, /* Security */
- NULL, /* thread */
- TRUE, /* inherit handles */
- flags, /* start flags */
- env,
- NULL, /* current directory */
- &si,
- &pi);
- if (!ret)
- error ("Error creating process %s\n", exec_file);
-
- exception_count = 0;
- event_count = 0;
-
- inferior_pid = pi.dwProcessId;
- current_process = pi.hProcess;
- current_thread = pi.hThread;
- current_process_id = pi.dwProcessId;
- current_thread_id = pi.dwThreadId;
- push_target (&child_ops);
- 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 ()
-{
- 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. */
-
-void
-child_stop ()
-{
- CHECK (GenerateConsoleCtrlEvent (CTRL_C_EVENT, 0));
-}
-
-int
-child_xfer_memory (CORE_ADDR memaddr, char *our, int len, int write, struct target_ops *target)
-{
- DWORD done;
- if (write)
- {
- WriteProcessMemory (current_process, memaddr, our, len, &done);
- FlushInstructionCache (current_process, memaddr, len);
- }
- else
- {
- ReadProcessMemory (current_process, memaddr, our, len, &done);
- }
- return done;
-}
-
-void
-child_kill_inferior (void)
-{
- CHECK (TerminateProcess (current_process, 0));
- CHECK (CloseHandle (current_process));
- CHECK (CloseHandle (current_thread));
-}
-
-void
-child_resume (int pid, int step, enum target_signal signal)
-{
- DEBUG (("child_resume (%d, %d, %d);\n", pid, step, signal));
-
- if (step)
- {
- /* Single step by setting t bit */
- child_fetch_inferior_registers (PS_REGNUM);
- context.EFlags |= FLAG_TRACE_BIT;
- }
-
- if (context.ContextFlags)
- {
- CHECK (SetThreadContext (current_thread, &context));
- context.ContextFlags = 0;
- }
-
- if (signal)
- {
- fprintf_unfiltered (gdb_stderr, "Can't send signals to the child.\n");
- }
-
- CHECK (ContinueDebugEvent (current_process_id,
- current_thread_id,
- DBG_CONTINUE));
-}
-
-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 ()
-{
-
-}
-struct target_ops child_ops =
-{
- "child", /* to_shortname */
- "Win32 child process", /* to_longname */
- "Win32 child process (started by the \"run\" command).", /* to_doc */
- child_open, /* to_open */
- child_close, /* to_close */
- child_attach, /* to_attach */
- child_detach, /* to_detach */
- child_resume, /* to_resume */
- child_wait, /* to_wait */
- child_fetch_inferior_registers,/* to_fetch_registers */
- child_store_inferior_registers,/* to_store_registers */
- child_prepare_to_store, /* to_child_prepare_to_store */
- child_xfer_memory, /* to_xfer_memory */
- child_files_info, /* to_files_info */
- memory_insert_breakpoint, /* to_insert_breakpoint */
- memory_remove_breakpoint, /* to_remove_breakpoint */
- terminal_init_inferior, /* to_terminal_init */
- terminal_inferior, /* to_terminal_inferior */
- terminal_ours_for_output, /* to_terminal_ours_for_output */
- terminal_ours, /* to_terminal_ours */
- child_terminal_info, /* to_terminal_info */
- child_kill_inferior, /* to_kill */
- 0, /* to_load */
- 0, /* to_lookup_symbol */
- child_create_inferior, /* to_create_inferior */
- child_mourn_inferior, /* to_mourn_inferior */
- child_can_run, /* to_can_run */
- 0, /* to_notice_signals */
- 0, /* to_thread_alive */
- child_stop, /* to_stop */
- process_stratum, /* to_stratum */
- 0, /* to_next */
- 1, /* to_has_all_memory */
- 1, /* to_has_memory */
- 1, /* to_has_stack */
- 1, /* to_has_registers */
- 1, /* to_has_execution */
- 0, /* to_sections */
- 0, /* to_sections_end */
- OPS_MAGIC /* to_magic */
-};
-
-void
-_initialize_inftarg ()
-{
- 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_target (&child_ops);
-}
projects / deliverable / binutils-gdb.git / blobdiff