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Diffstat (limited to 'gdb/inftarg.c')
| -rw-r--r-- | gdb/inftarg.c | 857 |
1 files changed, 0 insertions, 857 deletions
diff --git a/gdb/inftarg.c b/gdb/inftarg.c deleted file mode 100644 index e496811..0000000 --- a/gdb/inftarg.c +++ /dev/null @@ -1,857 +0,0 @@ -/* Target-vector operations for controlling Unix child processes, for GDB. - Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1998, 1999, - 2000, 2002 - Free Software Foundation, Inc. - Contributed by Cygnus Support. - - ## Contains temporary hacks.. - - 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 even the 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. */ - -#include "defs.h" -#include "frame.h" /* required by inferior.h */ -#include "inferior.h" -#include "target.h" -#include "gdbcore.h" -#include "command.h" -#include "gdb_stat.h" -#include <signal.h> -#include <sys/types.h> -#include <fcntl.h> - -#include "gdb_wait.h" - -extern struct symtab_and_line *child_enable_exception_callback (enum - exception_event_kind, - int); - -extern struct exception_event_record - *child_get_current_exception_event (void); - -extern void _initialize_inftarg (void); - -static void child_prepare_to_store (void); - -#ifndef CHILD_WAIT -static ptid_t child_wait (ptid_t, struct target_waitstatus *); -#endif /* CHILD_WAIT */ - -#if !defined(CHILD_POST_WAIT) -void child_post_wait (ptid_t, int); -#endif - -static void child_open (char *, int); - -static void child_files_info (struct target_ops *); - -static void child_detach (char *, int); - -static void child_detach_from_process (int, char *, int, int); - -static void child_attach (char *, int); - -static void child_attach_to_process (char *, int, int); - -#if !defined(CHILD_POST_ATTACH) -extern void child_post_attach (int); -#endif - -static void child_require_attach (char *, int); - -static void child_require_detach (int, char *, int); - -static void ptrace_me (void); - -static void ptrace_him (int); - -static void child_create_inferior (char *, char *, char **); - -static void child_mourn_inferior (void); - -static int child_can_run (void); - -static void child_stop (void); - -#ifndef CHILD_THREAD_ALIVE -int child_thread_alive (ptid_t); -#endif - -static void init_child_ops (void); - -extern char **environ; - -struct target_ops child_ops; - -int child_suppress_run = 0; /* Non-zero if inftarg should pretend not to - be a runnable target. Used by targets - that can sit atop inftarg, such as HPUX - thread support. */ - -#ifndef CHILD_WAIT - -/*## */ -/* Enable HACK for ttrace work. In - * infttrace.c/require_notification_of_events, - * this is set to 0 so that the loop in child_wait - * won't loop. - */ -int not_same_real_pid = 1; -/*## */ - - -/* Wait for child to do something. Return pid of child, or -1 in case - of error; store status through argument pointer OURSTATUS. */ - -static ptid_t -child_wait (ptid_t ptid, struct target_waitstatus *ourstatus) -{ - int save_errno; - int status; - char *execd_pathname = NULL; - int exit_status; - int related_pid; - int syscall_id; - enum target_waitkind kind; - int pid; - - do - { - set_sigint_trap (); /* Causes SIGINT to be passed on to the - attached process. */ - set_sigio_trap (); - - pid = ptrace_wait (inferior_ptid, &status); - - save_errno = errno; - - clear_sigio_trap (); - - clear_sigint_trap (); - - if (pid == -1) - { - if (save_errno == EINTR) - continue; - - fprintf_unfiltered (gdb_stderr, "Child process unexpectedly missing: %s.\n", - safe_strerror (save_errno)); - - /* Claim it exited with unknown signal. */ - ourstatus->kind = TARGET_WAITKIND_SIGNALLED; - ourstatus->value.sig = TARGET_SIGNAL_UNKNOWN; - return pid_to_ptid (-1); - } - - /* Did it exit? - */ - if (target_has_exited (pid, status, &exit_status)) - { - /* ??rehrauer: For now, ignore this. */ - continue; - } - - if (!target_thread_alive (pid_to_ptid (pid))) - { - ourstatus->kind = TARGET_WAITKIND_SPURIOUS; - return pid_to_ptid (pid); - } - - if (target_has_forked (pid, &related_pid) - && ((pid == PIDGET (inferior_ptid)) - || (related_pid == PIDGET (inferior_ptid)))) - { - ourstatus->kind = TARGET_WAITKIND_FORKED; - ourstatus->value.related_pid = related_pid; - return pid_to_ptid (pid); - } - - if (target_has_vforked (pid, &related_pid) - && ((pid == PIDGET (inferior_ptid)) - || (related_pid == PIDGET (inferior_ptid)))) - { - ourstatus->kind = TARGET_WAITKIND_VFORKED; - ourstatus->value.related_pid = related_pid; - return pid_to_ptid (pid); - } - - if (target_has_execd (pid, &execd_pathname)) - { - /* Are we ignoring initial exec events? (This is likely because - we're in the process of starting up the inferior, and another - (older) mechanism handles those.) If so, we'll report this - as a regular stop, not an exec. - */ - if (inferior_ignoring_startup_exec_events) - { - inferior_ignoring_startup_exec_events--; - } - else - { - ourstatus->kind = TARGET_WAITKIND_EXECD; - ourstatus->value.execd_pathname = execd_pathname; - return pid_to_ptid (pid); - } - } - - /* All we must do with these is communicate their occurrence - to wait_for_inferior... - */ - if (target_has_syscall_event (pid, &kind, &syscall_id)) - { - ourstatus->kind = kind; - ourstatus->value.syscall_id = syscall_id; - return pid_to_ptid (pid); - } - - /*## } while (pid != PIDGET (inferior_ptid)); ## *//* Some other child died or stopped */ -/* hack for thread testing */ - } - while ((pid != PIDGET (inferior_ptid)) && not_same_real_pid); -/*## */ - - store_waitstatus (ourstatus, status); - return pid_to_ptid (pid); -} -#endif /* CHILD_WAIT */ - -#if !defined(CHILD_POST_WAIT) -void -child_post_wait (ptid_t ptid, int wait_status) -{ - /* This version of Unix doesn't require a meaningful "post wait" - operation. - */ -} -#endif - - -#ifndef CHILD_THREAD_ALIVE - -/* Check to see if the given thread is alive. - - FIXME: Is kill() ever the right way to do this? I doubt it, but - for now we're going to try and be compatable with the old thread - code. */ -int -child_thread_alive (ptid_t ptid) -{ - pid_t pid = PIDGET (ptid); - - return (kill (pid, 0) != -1); -} - -#endif - -static void -child_attach_to_process (char *args, int from_tty, int after_fork) -{ - if (!args) - error_no_arg ("process-id to attach"); - -#ifndef ATTACH_DETACH - error ("Can't attach to a process on this machine."); -#else - { - char *exec_file; - int pid; - char *dummy; - - dummy = args; - pid = strtol (args, &dummy, 0); - /* Some targets don't set errno on errors, grrr! */ - if ((pid == 0) && (args == dummy)) - error ("Illegal process-id: %s\n", args); - - if (pid == getpid ()) /* Trying to masturbate? */ - error ("I refuse to debug myself!"); - - if (from_tty) - { - exec_file = (char *) get_exec_file (0); - - if (after_fork) - printf_unfiltered ("Attaching after fork to %s\n", - target_pid_to_str (pid_to_ptid (pid))); - else if (exec_file) - printf_unfiltered ("Attaching to program: %s, %s\n", exec_file, - target_pid_to_str (pid_to_ptid (pid))); - else - printf_unfiltered ("Attaching to %s\n", - target_pid_to_str (pid_to_ptid (pid))); - - gdb_flush (gdb_stdout); - } - - if (!after_fork) - attach (pid); - else - REQUIRE_ATTACH (pid); - - inferior_ptid = pid_to_ptid (pid); - push_target (&child_ops); - } -#endif /* ATTACH_DETACH */ -} - - -/* Attach to process PID, then initialize for debugging it. */ - -static void -child_attach (char *args, int from_tty) -{ - child_attach_to_process (args, from_tty, 0); -} - -#if !defined(CHILD_POST_ATTACH) -void -child_post_attach (int pid) -{ - /* This version of Unix doesn't require a meaningful "post attach" - operation by a debugger. */ -} -#endif - -static void -child_require_attach (char *args, int from_tty) -{ - child_attach_to_process (args, from_tty, 1); -} - -static void -child_detach_from_process (int pid, char *args, int from_tty, int after_fork) -{ -#ifdef ATTACH_DETACH - { - int siggnal = 0; - - if (from_tty) - { - char *exec_file = get_exec_file (0); - if (exec_file == 0) - exec_file = ""; - if (after_fork) - printf_unfiltered ("Detaching after fork from %s\n", - target_pid_to_str (pid_to_ptid (pid))); - else - printf_unfiltered ("Detaching from program: %s, %s\n", exec_file, - target_pid_to_str (pid_to_ptid (pid))); - gdb_flush (gdb_stdout); - } - if (args) - siggnal = atoi (args); - - if (!after_fork) - detach (siggnal); - else - REQUIRE_DETACH (pid, siggnal); - } -#else - error ("This version of Unix does not support detaching a process."); -#endif -} - -/* Take a program previously attached to and detaches it. - The program resumes execution and will no longer stop - on signals, etc. We'd better not have left any breakpoints - in the program or it'll die when it hits one. For this - to work, it may be necessary for the process to have been - previously attached. It *might* work if the program was - started via the normal ptrace (PTRACE_TRACEME). */ - -static void -child_detach (char *args, int from_tty) -{ - child_detach_from_process (PIDGET (inferior_ptid), args, from_tty, 0); - inferior_ptid = null_ptid; - unpush_target (&child_ops); -} - -static void -child_require_detach (int pid, char *args, int from_tty) -{ - child_detach_from_process (pid, args, from_tty, 1); -} - - -/* Get ready to modify the registers array. On machines which store - individual registers, this doesn't need to do anything. On machines - which store all the registers in one fell swoop, this makes sure - that registers contains all the registers from the program being - debugged. */ - -static void -child_prepare_to_store (void) -{ -#ifdef CHILD_PREPARE_TO_STORE - CHILD_PREPARE_TO_STORE (); -#endif -} - -/* Print status information about what we're accessing. */ - -static void -child_files_info (struct target_ops *ignore) -{ - printf_unfiltered ("\tUsing the running image of %s %s.\n", - attach_flag ? "attached" : "child", target_pid_to_str (inferior_ptid)); -} - -/* ARGSUSED */ -static void -child_open (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. */ - -static void -ptrace_me (void) -{ - /* "Trace me, Dr. Memory!" */ - call_ptrace (0, 0, (PTRACE_ARG3_TYPE) 0, 0); -} - -/* Stub function which causes the GDB that runs it, to start ptrace-ing - the child process. */ - -static void -ptrace_him (int pid) -{ - push_target (&child_ops); - - /* On some targets, there must be some explicit synchronization - between the parent and child processes after the debugger - forks, and before the child execs the debuggee program. This - call basically gives permission for the child to exec. - */ - - target_acknowledge_created_inferior (pid); - - /* START_INFERIOR_TRAPS_EXPECTED is defined in inferior.h, - * and will be 1 or 2 depending on whether we're starting - * without or with a shell. - */ - startup_inferior (START_INFERIOR_TRAPS_EXPECTED); - - /* On some targets, there must be some explicit actions taken after - the inferior has been started up. - */ - target_post_startup_inferior (pid_to_ptid (pid)); -} - -/* Start an inferior Unix child process and sets inferior_ptid 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 (char *exec_file, char *allargs, char **env) -{ -#ifdef HPUXHPPA - fork_inferior (exec_file, allargs, env, ptrace_me, ptrace_him, pre_fork_inferior, NULL); -#else - fork_inferior (exec_file, allargs, env, ptrace_me, ptrace_him, NULL, NULL); -#endif - /* We are at the first instruction we care about. */ - /* Pedal to the metal... */ - proceed ((CORE_ADDR) -1, TARGET_SIGNAL_0, 0); -} - -#if !defined(CHILD_POST_STARTUP_INFERIOR) -void -child_post_startup_inferior (ptid_t ptid) -{ - /* This version of Unix doesn't require a meaningful "post startup inferior" - operation by a debugger. - */ -} -#endif - -#if !defined(CHILD_ACKNOWLEDGE_CREATED_INFERIOR) -void -child_acknowledge_created_inferior (int pid) -{ - /* This version of Unix doesn't require a meaningful "acknowledge created inferior" - operation by a debugger. - */ -} -#endif - - -void -child_clone_and_follow_inferior (int child_pid, int *followed_child) -{ - clone_and_follow_inferior (child_pid, followed_child); - - /* Don't resume CHILD_PID; it's stopped where it ought to be, until - the decision gets made elsewhere how to continue it. - */ -} - - -#if !defined(CHILD_POST_FOLLOW_INFERIOR_BY_CLONE) -void -child_post_follow_inferior_by_clone (void) -{ - /* This version of Unix doesn't require a meaningful "post follow inferior" - operation by a clone debugger. - */ -} -#endif - -#if !defined(CHILD_INSERT_FORK_CATCHPOINT) -int -child_insert_fork_catchpoint (int pid) -{ - /* This version of Unix doesn't support notification of fork events. */ - return 0; -} -#endif - -#if !defined(CHILD_REMOVE_FORK_CATCHPOINT) -int -child_remove_fork_catchpoint (int pid) -{ - /* This version of Unix doesn't support notification of fork events. */ - return 0; -} -#endif - -#if !defined(CHILD_INSERT_VFORK_CATCHPOINT) -int -child_insert_vfork_catchpoint (int pid) -{ - /* This version of Unix doesn't support notification of vfork events. */ - return 0; -} -#endif - -#if !defined(CHILD_REMOVE_VFORK_CATCHPOINT) -int -child_remove_vfork_catchpoint (int pid) -{ - /* This version of Unix doesn't support notification of vfork events. */ - return 0; -} -#endif - -#if !defined(CHILD_HAS_FORKED) -int -child_has_forked (int pid, int *child_pid) -{ - /* This version of Unix doesn't support notification of fork events. */ - return 0; -} -#endif - - -#if !defined(CHILD_HAS_VFORKED) -int -child_has_vforked (int pid, int *child_pid) -{ - /* This version of Unix doesn't support notification of vfork events. - */ - return 0; -} -#endif - - -#if !defined(CHILD_CAN_FOLLOW_VFORK_PRIOR_TO_EXEC) -int -child_can_follow_vfork_prior_to_exec (void) -{ - /* This version of Unix doesn't support notification of vfork events. - However, if it did, it probably wouldn't allow vforks to be followed - before the following exec. - */ - return 0; -} -#endif - - -#if !defined(CHILD_POST_FOLLOW_VFORK) -void -child_post_follow_vfork (int parent_pid, int followed_parent, int child_pid, - int followed_child) -{ - /* This version of Unix doesn't require a meaningful "post follow vfork" - operation by a clone debugger. - */ -} -#endif - -#if !defined(CHILD_INSERT_EXEC_CATCHPOINT) -int -child_insert_exec_catchpoint (int pid) -{ - /* This version of Unix doesn't support notification of exec events. */ - return 0; -} -#endif - -#if !defined(CHILD_REMOVE_EXEC_CATCHPOINT) -int -child_remove_exec_catchpoint (int pid) -{ - /* This version of Unix doesn't support notification of exec events. */ - return 0; -} -#endif - -#if !defined(CHILD_HAS_EXECD) -int -child_has_execd (int pid, char **execd_pathname) -{ - /* This version of Unix doesn't support notification of exec events. - */ - return 0; -} -#endif - - -#if !defined(CHILD_REPORTED_EXEC_EVENTS_PER_EXEC_CALL) -int -child_reported_exec_events_per_exec_call (void) -{ - /* This version of Unix doesn't support notification of exec events. - */ - return 1; -} -#endif - - -#if !defined(CHILD_HAS_SYSCALL_EVENT) -int -child_has_syscall_event (int pid, enum target_waitkind *kind, int *syscall_id) -{ - /* This version of Unix doesn't support notification of syscall events. - */ - return 0; -} -#endif - - -#if !defined(CHILD_HAS_EXITED) -int -child_has_exited (int pid, int wait_status, int *exit_status) -{ - if (WIFEXITED (wait_status)) - { - *exit_status = WEXITSTATUS (wait_status); - return 1; - } - - if (WIFSIGNALED (wait_status)) - { - *exit_status = 0; /* ?? Don't know what else to say here. */ - return 1; - } - - /* ?? Do we really need to consult the event state, too? Assume the - wait_state alone suffices. - */ - return 0; -} -#endif - - -static void -child_mourn_inferior (void) -{ - unpush_target (&child_ops); - generic_mourn_inferior (); -} - -static int -child_can_run (void) -{ - /* This variable is controlled by modules that sit atop inftarg that may layer - their own process structure atop that provided here. hpux-thread.c does - this because of the Hpux user-mode level thread model. */ - - return !child_suppress_run; -} - -/* Send a SIGINT to the process group. This acts just like the user typed a - ^C on the controlling terminal. - - XXX - This may not be correct for all systems. Some may want to use - killpg() instead of kill (-pgrp). */ - -static void -child_stop (void) -{ - extern pid_t inferior_process_group; - - kill (-inferior_process_group, SIGINT); -} - -#if !defined(CHILD_ENABLE_EXCEPTION_CALLBACK) -struct symtab_and_line * -child_enable_exception_callback (enum exception_event_kind kind, int enable) -{ - return (struct symtab_and_line *) NULL; -} -#endif - -#if !defined(CHILD_GET_CURRENT_EXCEPTION_EVENT) -struct exception_event_record * -child_get_current_exception_event (void) -{ - return (struct exception_event_record *) NULL; -} -#endif - - -#if !defined(CHILD_PID_TO_EXEC_FILE) -char * -child_pid_to_exec_file (int pid) -{ - /* This version of Unix doesn't support translation of a process ID - to the filename of the executable file. - */ - return NULL; -} -#endif - -char * -child_core_file_to_sym_file (char *core) -{ - /* The target stratum for a running executable need not support - this operation. - */ - return NULL; -} - - -#if !defined(CHILD_PID_TO_STR) -char * -child_pid_to_str (ptid_t ptid) -{ - return normal_pid_to_str (ptid); -} -#endif - -static void -init_child_ops (void) -{ - child_ops.to_shortname = "child"; - child_ops.to_longname = "Unix child process"; - child_ops.to_doc = "Unix child process (started by the \"run\" command)."; - child_ops.to_open = child_open; - child_ops.to_attach = child_attach; - child_ops.to_post_attach = child_post_attach; - child_ops.to_require_attach = child_require_attach; - child_ops.to_detach = child_detach; - child_ops.to_require_detach = child_require_detach; - child_ops.to_resume = child_resume; - child_ops.to_wait = child_wait; - child_ops.to_post_wait = child_post_wait; - child_ops.to_fetch_registers = fetch_inferior_registers; - child_ops.to_store_registers = 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_save_ours = terminal_save_ours; - child_ops.to_terminal_ours = terminal_ours; - child_ops.to_terminal_info = child_terminal_info; - child_ops.to_kill = kill_inferior; - child_ops.to_create_inferior = child_create_inferior; - child_ops.to_post_startup_inferior = child_post_startup_inferior; - child_ops.to_acknowledge_created_inferior = child_acknowledge_created_inferior; - child_ops.to_clone_and_follow_inferior = child_clone_and_follow_inferior; - child_ops.to_post_follow_inferior_by_clone = child_post_follow_inferior_by_clone; - child_ops.to_insert_fork_catchpoint = child_insert_fork_catchpoint; - child_ops.to_remove_fork_catchpoint = child_remove_fork_catchpoint; - child_ops.to_insert_vfork_catchpoint = child_insert_vfork_catchpoint; - child_ops.to_remove_vfork_catchpoint = child_remove_vfork_catchpoint; - child_ops.to_has_forked = child_has_forked; - child_ops.to_has_vforked = child_has_vforked; - child_ops.to_can_follow_vfork_prior_to_exec = child_can_follow_vfork_prior_to_exec; - child_ops.to_post_follow_vfork = child_post_follow_vfork; - child_ops.to_insert_exec_catchpoint = child_insert_exec_catchpoint; - child_ops.to_remove_exec_catchpoint = child_remove_exec_catchpoint; - child_ops.to_has_execd = child_has_execd; - child_ops.to_reported_exec_events_per_exec_call = child_reported_exec_events_per_exec_call; - child_ops.to_has_syscall_event = child_has_syscall_event; - child_ops.to_has_exited = child_has_exited; - child_ops.to_mourn_inferior = child_mourn_inferior; - child_ops.to_can_run = child_can_run; - child_ops.to_thread_alive = child_thread_alive; - child_ops.to_pid_to_str = child_pid_to_str; - child_ops.to_stop = child_stop; - child_ops.to_enable_exception_callback = child_enable_exception_callback; - child_ops.to_get_current_exception_event = child_get_current_exception_event; - child_ops.to_pid_to_exec_file = child_pid_to_exec_file; - child_ops.to_stratum = process_stratum; - 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_magic = OPS_MAGIC; -} - -/* Take over the 'find_mapped_memory' vector from inftarg.c. */ -extern void -inftarg_set_find_memory_regions (int (*func) (int (*) (CORE_ADDR, - unsigned long, - int, int, int, - void *), - void *)) -{ - child_ops.to_find_memory_regions = func; -} - -/* Take over the 'make_corefile_notes' vector from inftarg.c. */ -extern void -inftarg_set_make_corefile_notes (char * (*func) (bfd *, int *)) -{ - child_ops.to_make_corefile_notes = func; -} - -void -_initialize_inftarg (void) -{ -#ifdef HAVE_OPTIONAL_PROC_FS - char procname[32]; - int fd; - - /* If we have an optional /proc filesystem (e.g. under OSF/1), - don't add ptrace support if we can access the running GDB via /proc. */ -#ifndef PROC_NAME_FMT -#define PROC_NAME_FMT "/proc/%05d" -#endif - sprintf (procname, PROC_NAME_FMT, getpid ()); - if ((fd = open (procname, O_RDONLY)) >= 0) - { - close (fd); - return; - } -#endif - - init_child_ops (); - add_target (&child_ops); -} |