Fri Sep 25 12:09:33 1992 K. Richard Pixley (rich@sendai.cygnus.com)
+ * inftarg.c (child_create_inferior, child_attach,
+ child_mourn_inferior): collect unix child process stratum
+ functions which live below the target vector into this file to
+ facilitate host/target/native split. Also, make them static.
+ * inflow.c (child_mourn_inferior): removed.
+ * infrun.c (child_create_inferior, child_attach): removed.
+ (resume): becomes global so that functions below the
+ target vector can find it.
+ * inferior.h (resume): add prototype.
+ (child_mourn_inferior, child_create_inferior, child_attach):
+ remove prototypes.
+
* xcoffexec.c (exec_ops): child_attach and child_create_inferior
replaced with find_default_attach and
find_default_create_inferior.
extern char registers[];
+/* Array of validity bits (one per register). Nonzero at position XXX_REGNUM
+ means that `registers' contains a valid copy of inferior register XXX. */
+
+extern char register_valid[NUM_REGS];
+
extern void
clear_proceed_status PARAMS ((void));
kill_inferior PARAMS ((void));
extern void
-kill_inferior_fast PARAMS ((void));
-
-extern void
generic_mourn_inferior PARAMS ((void));
extern void
extern void
reopen_exec_file PARAMS ((void));
+extern void
+resume PARAMS ((int, int));
+
/* From misc files */
extern void
solib_create_inferior_hook PARAMS ((void));
extern void
-child_mourn_inferior PARAMS ((void));
-
-extern void
child_terminal_info PARAMS ((char *, int));
extern void
extern void
child_resume PARAMS ((int, int));
+#ifndef PTRACE_ARG3_TYPE
+#define PTRACE_ARG3_TYPE int /* Correct definition for most systems. */
+#endif
+
+extern int
+call_ptrace PARAMS ((int, int, PTRACE_ARG3_TYPE, int));
+
/* From procfs.c */
#ifdef USE_PROC_FS
start_remote PARAMS ((void));
extern void
-child_create_inferior PARAMS ((char *, char *, char **));
-
-extern void
-child_attach PARAMS ((char *, int));
-
-extern void
normal_stop PARAMS ((void));
extern int
-/* Start (run) and stop the inferior process, for GDB.
+/* Target independent code for starting (run) and stoping an inferior
+ process.
+
Copyright 1986, 1987, 1988, 1989, 1991, 1992 Free Software Foundation, Inc.
This file is part of GDB.
#include "wait.h"
#include "gdbcore.h"
#include "command.h"
-#include "terminal.h" /* For #ifdef TIOCGPGRP and new_tty */
#include "target.h"
#include <signal.h>
#include <sys/file.h>
#endif
-#ifdef SET_STACK_LIMIT_HUGE
-#include <sys/time.h>
-#include <sys/resource.h>
-
-extern int original_stack_limit;
-#endif /* SET_STACK_LIMIT_HUGE */
-
/* Prototypes for local functions */
static void
insert_step_breakpoint PARAMS ((void));
static void
-resume PARAMS ((int, int));
-
-static void
resume_cleanups PARAMS ((int));
-extern char **environ;
-
extern struct target_ops child_ops; /* In inftarg.c */
/* Sigtramp is a routine that the kernel calls (which then calls the
STEP nonzero if we should step (zero to continue instead).
SIG is the signal to give the inferior (zero for none). */
-static void
+void
resume (step, sig)
int step;
int sig;
static char *prev_func_name;
\f
-/* 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(). */
-
-#ifndef SHELL_FILE
-#define SHELL_FILE "/bin/sh"
-#endif
-
-void
-child_create_inferior (exec_file, allargs, env)
- char *exec_file;
- char *allargs;
- char **env;
-{
- int pid;
- char *shell_command;
- char *shell_file;
- static char default_shell_file[] = SHELL_FILE;
- int len;
- int pending_execs;
- /* Set debug_fork then attach to the child while it sleeps, to debug. */
- static int debug_fork = 0;
- /* This is set to the result of setpgrp, which if vforked, will be visible
- to you in the parent process. It's only used by humans for debugging. */
- static int debug_setpgrp = 657473;
- char **save_our_env;
-
- /* The user might want tilde-expansion, and in general probably wants
- the program to behave the same way as if run from
- his/her favorite shell. So we let the shell run it for us.
- FIXME, this should probably search the local environment (as
- modified by the setenv command), not the env gdb inherited. */
- shell_file = getenv ("SHELL");
- if (shell_file == NULL)
- shell_file = default_shell_file;
-
- len = 5 + strlen (exec_file) + 1 + strlen (allargs) + 1 + /*slop*/ 10;
- /* If desired, concat something onto the front of ALLARGS.
- SHELL_COMMAND is the result. */
-#ifdef SHELL_COMMAND_CONCAT
- shell_command = (char *) alloca (strlen (SHELL_COMMAND_CONCAT) + len);
- strcpy (shell_command, SHELL_COMMAND_CONCAT);
-#else
- shell_command = (char *) alloca (len);
- shell_command[0] = '\0';
-#endif
- strcat (shell_command, "exec ");
- strcat (shell_command, exec_file);
- strcat (shell_command, " ");
- strcat (shell_command, allargs);
-
- /* exec is said to fail if the executable is open. */
- close_exec_file ();
-
- /* Retain a copy of our environment variables, since the child will
- replace the value of environ and if we're vforked, we have to
- restore it. */
- save_our_env = environ;
-
- /* Tell the terminal handling subsystem what tty we plan to run on;
- it will just record the information for later. */
-
- new_tty_prefork (inferior_io_terminal);
-
- /* It is generally good practice to flush any possible pending stdio
- output prior to doing a fork, to avoid the possibility of both the
- parent and child flushing the same data after the fork. */
-
- fflush (stdout);
- fflush (stderr);
-
-#if defined(USG) && !defined(HAVE_VFORK)
- pid = fork ();
-#else
- if (debug_fork)
- pid = fork ();
- else
- pid = vfork ();
-#endif
-
- if (pid < 0)
- perror_with_name ("vfork");
-
- if (pid == 0)
- {
- if (debug_fork)
- sleep (debug_fork);
-
-#ifdef TIOCGPGRP
- /* Run inferior in a separate process group. */
-#ifdef NEED_POSIX_SETPGID
- debug_setpgrp = setpgid (0, 0);
-#else
-#if defined(USG) && !defined(SETPGRP_ARGS)
- debug_setpgrp = setpgrp ();
-#else
- debug_setpgrp = setpgrp (getpid (), getpid ());
-#endif /* USG */
-#endif /* NEED_POSIX_SETPGID */
- if (debug_setpgrp == -1)
- perror("setpgrp failed in child");
-#endif /* TIOCGPGRP */
-
-#ifdef SET_STACK_LIMIT_HUGE
- /* Reset the stack limit back to what it was. */
- {
- struct rlimit rlim;
-
- getrlimit (RLIMIT_STACK, &rlim);
- rlim.rlim_cur = original_stack_limit;
- setrlimit (RLIMIT_STACK, &rlim);
- }
-#endif /* SET_STACK_LIMIT_HUGE */
-
- /* Ask the tty subsystem to switch to the one we specified earlier
- (or to share the current terminal, if none was specified). */
-
- new_tty ();
-
- /* Changing the signal handlers for the inferior after
- a vfork can also change them for the superior, so we don't mess
- with signals here. See comments in
- initialize_signals for how we get the right signal handlers
- for the inferior. */
-
-#ifdef USE_PROC_FS
- /* Use SVR4 /proc interface */
- proc_set_exec_trap ();
-#else
- /* "Trace me, Dr. Memory!" */
- call_ptrace (0, 0, (PTRACE_ARG3_TYPE) 0, 0);
-#endif
-
- /* There is no execlpe call, so we have to set the environment
- for our child in the global variable. If we've vforked, this
- clobbers the parent, but environ is restored a few lines down
- in the parent. By the way, yes we do need to look down the
- path to find $SHELL. Rich Pixley says so, and I agree. */
- environ = env;
- execlp (shell_file, shell_file, "-c", shell_command, (char *)0);
-
- fprintf (stderr, "Cannot exec %s: %s.\n", shell_file,
- safe_strerror (errno));
- fflush (stderr);
- _exit (0177);
- }
-
- /* Restore our environment in case a vforked child clob'd it. */
- environ = save_our_env;
-
- /* Now that we have a child process, make it our target. */
- push_target (&child_ops);
-
-#ifdef CREATE_INFERIOR_HOOK
- CREATE_INFERIOR_HOOK (pid);
-#endif
-
-/* The process was started by the fork that created it,
- but it will have stopped one instruction after execing the shell.
- Here we must get it up to actual execution of the real program. */
-
- inferior_pid = pid; /* Needed for wait_for_inferior stuff below */
-
- clear_proceed_status ();
-
- /* We will get a trace trap after one instruction.
- Continue it automatically. Eventually (after shell does an exec)
- it will get another trace trap. Then insert breakpoints and continue. */
-
-#ifdef START_INFERIOR_TRAPS_EXPECTED
- pending_execs = START_INFERIOR_TRAPS_EXPECTED;
-#else
- pending_execs = 2;
-#endif
-
- init_wait_for_inferior ();
-
- /* Set up the "saved terminal modes" of the inferior
- based on what modes we are starting it with. */
- target_terminal_init ();
-
- /* Install inferior's terminal modes. */
- target_terminal_inferior ();
-
- while (1)
- {
- stop_soon_quietly = 1; /* Make wait_for_inferior be quiet */
- wait_for_inferior ();
- if (stop_signal != SIGTRAP)
- {
- /* Let shell child handle its own signals in its own way */
- /* FIXME, what if child has exit()ed? Must exit loop somehow */
- resume (0, stop_signal);
- }
- else
- {
- /* We handle SIGTRAP, however; it means child did an exec. */
- if (0 == --pending_execs)
- break;
- resume (0, 0); /* Just make it go on */
- }
- }
- stop_soon_quietly = 0;
-
- /* We are now in the child process of interest, having exec'd the
- correct program, and are poised at the first instruction of the
- new program. */
-#ifdef SOLIB_CREATE_INFERIOR_HOOK
- SOLIB_CREATE_INFERIOR_HOOK (pid);
-#endif
-
- /* Pedal to the metal. Away we go. */
- proceed ((CORE_ADDR) -1, 0, 0);
-}
-
/* Start remote-debugging of a machine over a serial link. */
void
}
-/* Attach to process PID, then initialize for debugging it
- and wait for the trace-trap that results from attaching. */
-
-void
-child_attach (args, from_tty)
- char *args;
- int from_tty;
-{
- char *exec_file;
- int pid;
-
- dont_repeat();
-
- if (!args)
- error_no_arg ("process-id to attach");
-
-#ifndef ATTACH_DETACH
- error ("Can't attach to a process on this machine.");
-#else
- pid = atoi (args);
-
- if (pid == getpid()) /* Trying to masturbate? */
- error ("I refuse to debug myself!");
-
- if (target_has_execution)
- {
- if (query ("A program is being debugged already. Kill it? "))
- target_kill ();
- else
- error ("Inferior not killed.");
- }
-
- exec_file = (char *) get_exec_file (1);
-
- if (from_tty)
- {
- printf ("Attaching program: %s pid %d\n",
- exec_file, pid);
- fflush (stdout);
- }
-
- attach (pid);
- inferior_pid = pid;
- push_target (&child_ops);
-
- mark_breakpoints_out ();
- target_terminal_init ();
- clear_proceed_status ();
- stop_soon_quietly = 1;
- /*proceed (-1, 0, -2);*/
- target_terminal_inferior ();
- wait_for_inferior ();
-#ifdef SOLIB_ADD
- SOLIB_ADD ((char *)0, from_tty, (struct target_ops *)0);
-#endif
- normal_stop ();
-#endif /* ATTACH_DETACH */
-}
\f
/* Wait for control to return from inferior to debugger.
If inferior gets a signal, we may decide to start it up again
-/* Subroutines for handling an "inferior" (child) process as a target
- for debugging, in GDB.
- Copyright 1990, 1991 Free Software Foundation, Inc.
+/* This file inplements the host independent child process statum.
+
+ Copyright 1990, 1991, 1992 Free Software Foundation, Inc.
Contributed by Cygnus Support.
This file is part of GDB.
#include "wait.h"
#include "gdbcore.h"
#include "ieee-float.h" /* Required by REGISTER_CONVERT_TO_XXX */
+#include "terminal.h" /* For #ifdef TIOCGPGRP and new_tty */
+
+#include <signal.h>
+
+#ifdef SET_STACK_LIMIT_HUGE
+#include <sys/time.h>
+#include <sys/resource.h>
+
+extern int original_stack_limit;
+#endif /* SET_STACK_LIMIT_HUGE */
static void
child_prepare_to_store PARAMS ((void));
static void
child_detach PARAMS ((char *, int));
+static void
+child_attach PARAMS ((char *, int));
+
+static void
+child_create_inferior PARAMS ((char *, char *, char **));
+
+static void
+child_mourn_inferior PARAMS ((void));
+
+extern char **environ;
+
/* Forward declaration */
extern struct target_ops child_ops;
}
+/* Attach to process PID, then initialize for debugging it
+ and wait for the trace-trap that results from attaching. */
+
+static void
+child_attach (args, from_tty)
+ char *args;
+ int from_tty;
+{
+ char *exec_file;
+ int pid;
+
+ dont_repeat();
+
+ if (!args)
+ error_no_arg ("process-id to attach");
+
+#ifndef ATTACH_DETACH
+ error ("Can't attach to a process on this machine.");
+#else
+ pid = atoi (args);
+
+ if (pid == getpid()) /* Trying to masturbate? */
+ error ("I refuse to debug myself!");
+
+ if (target_has_execution)
+ {
+ if (query ("A program is being debugged already. Kill it? "))
+ target_kill ();
+ else
+ error ("Inferior not killed.");
+ }
+
+ if (from_tty)
+ {
+ exec_file = (char *) get_exec_file (0);
+
+ if (exec_file)
+ printf ("Attaching program `%s', pid %d\n", exec_file, pid);
+ else
+ printf ("Attaching pid %d\n", pid);
+
+ fflush (stdout);
+ }
+
+ attach (pid);
+ inferior_pid = pid;
+ push_target (&child_ops);
+
+ mark_breakpoints_out ();
+ target_terminal_init ();
+ clear_proceed_status ();
+ stop_soon_quietly = 1;
+ /*proceed (-1, 0, -2);*/
+ target_terminal_inferior ();
+ wait_for_inferior ();
+#ifdef SOLIB_ADD
+ SOLIB_ADD ((char *)0, from_tty, (struct target_ops *)0);
+#endif
+ normal_stop ();
+#endif /* ATTACH_DETACH */
+}
+
/*
* child_detach()
* takes a program previously attached to and detaches it.
error ("Use the \"run\" command to start a Unix child 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(). */
+
+#ifndef SHELL_FILE
+#define SHELL_FILE "/bin/sh"
+#endif
+
+static void
+child_create_inferior (exec_file, allargs, env)
+ char *exec_file;
+ char *allargs;
+ char **env;
+{
+ int pid;
+ char *shell_command;
+ char *shell_file;
+ static char default_shell_file[] = SHELL_FILE;
+ int len;
+ int pending_execs;
+ /* Set debug_fork then attach to the child while it sleeps, to debug. */
+ static int debug_fork = 0;
+ /* This is set to the result of setpgrp, which if vforked, will be visible
+ to you in the parent process. It's only used by humans for debugging. */
+ static int debug_setpgrp = 657473;
+ char **save_our_env;
+
+ /* If no exec file handed to us, get it from the exec-file command -- with
+ a good, common error message if none is specified. */
+ if (exec_file == 0)
+ exec_file = get_exec_file(1);
+
+ /* The user might want tilde-expansion, and in general probably wants
+ the program to behave the same way as if run from
+ his/her favorite shell. So we let the shell run it for us.
+ FIXME, this should probably search the local environment (as
+ modified by the setenv command), not the env gdb inherited. */
+ shell_file = getenv ("SHELL");
+ if (shell_file == NULL)
+ shell_file = default_shell_file;
+
+ len = 5 + strlen (exec_file) + 1 + strlen (allargs) + 1 + /*slop*/ 10;
+ /* If desired, concat something onto the front of ALLARGS.
+ SHELL_COMMAND is the result. */
+#ifdef SHELL_COMMAND_CONCAT
+ shell_command = (char *) alloca (strlen (SHELL_COMMAND_CONCAT) + len);
+ strcpy (shell_command, SHELL_COMMAND_CONCAT);
+#else
+ shell_command = (char *) alloca (len);
+ shell_command[0] = '\0';
+#endif
+ strcat (shell_command, "exec ");
+ strcat (shell_command, exec_file);
+ strcat (shell_command, " ");
+ strcat (shell_command, allargs);
+
+ /* exec is said to fail if the executable is open. */
+ close_exec_file ();
+
+ /* Retain a copy of our environment variables, since the child will
+ replace the value of environ and if we're vforked, we have to
+ restore it. */
+ save_our_env = environ;
+
+ /* Tell the terminal handling subsystem what tty we plan to run on;
+ it will just record the information for later. */
+
+ new_tty_prefork (inferior_io_terminal);
+
+ /* It is generally good practice to flush any possible pending stdio
+ output prior to doing a fork, to avoid the possibility of both the
+ parent and child flushing the same data after the fork. */
+
+ fflush (stdout);
+ fflush (stderr);
+
+#if defined(USG) && !defined(HAVE_VFORK)
+ pid = fork ();
+#else
+ if (debug_fork)
+ pid = fork ();
+ else
+ pid = vfork ();
+#endif
+
+ if (pid < 0)
+ perror_with_name ("vfork");
+
+ if (pid == 0)
+ {
+ if (debug_fork)
+ sleep (debug_fork);
+
+#ifdef TIOCGPGRP
+ /* Run inferior in a separate process group. */
+#ifdef NEED_POSIX_SETPGID
+ debug_setpgrp = setpgid (0, 0);
+#else
+#if defined(USG) && !defined(SETPGRP_ARGS)
+ debug_setpgrp = setpgrp ();
+#else
+ debug_setpgrp = setpgrp (getpid (), getpid ());
+#endif /* USG */
+#endif /* NEED_POSIX_SETPGID */
+ if (debug_setpgrp == -1)
+ perror("setpgrp failed in child");
+#endif /* TIOCGPGRP */
+
+#ifdef SET_STACK_LIMIT_HUGE
+ /* Reset the stack limit back to what it was. */
+ {
+ struct rlimit rlim;
+
+ getrlimit (RLIMIT_STACK, &rlim);
+ rlim.rlim_cur = original_stack_limit;
+ setrlimit (RLIMIT_STACK, &rlim);
+ }
+#endif /* SET_STACK_LIMIT_HUGE */
+
+ /* Ask the tty subsystem to switch to the one we specified earlier
+ (or to share the current terminal, if none was specified). */
+
+ new_tty ();
+
+ /* Changing the signal handlers for the inferior after
+ a vfork can also change them for the superior, so we don't mess
+ with signals here. See comments in
+ initialize_signals for how we get the right signal handlers
+ for the inferior. */
+
+#ifdef USE_PROC_FS
+ /* Use SVR4 /proc interface */
+ proc_set_exec_trap ();
+#else
+ /* "Trace me, Dr. Memory!" */
+ call_ptrace (0, 0, (PTRACE_ARG3_TYPE) 0, 0);
+#endif
+
+ /* There is no execlpe call, so we have to set the environment
+ for our child in the global variable. If we've vforked, this
+ clobbers the parent, but environ is restored a few lines down
+ in the parent. By the way, yes we do need to look down the
+ path to find $SHELL. Rich Pixley says so, and I agree. */
+ environ = env;
+ execlp (shell_file, shell_file, "-c", shell_command, (char *)0);
+
+ fprintf (stderr, "Cannot exec %s: %s.\n", shell_file,
+ safe_strerror (errno));
+ fflush (stderr);
+ _exit (0177);
+ }
+
+ /* Restore our environment in case a vforked child clob'd it. */
+ environ = save_our_env;
+
+ /* Now that we have a child process, make it our target. */
+ push_target (&child_ops);
+
+#ifdef CREATE_INFERIOR_HOOK
+ CREATE_INFERIOR_HOOK (pid);
+#endif
+
+/* The process was started by the fork that created it,
+ but it will have stopped one instruction after execing the shell.
+ Here we must get it up to actual execution of the real program. */
+
+ inferior_pid = pid; /* Needed for wait_for_inferior stuff below */
+
+ clear_proceed_status ();
+
+ /* We will get a trace trap after one instruction.
+ Continue it automatically. Eventually (after shell does an exec)
+ it will get another trace trap. Then insert breakpoints and continue. */
+
+#ifdef START_INFERIOR_TRAPS_EXPECTED
+ pending_execs = START_INFERIOR_TRAPS_EXPECTED;
+#else
+ pending_execs = 2;
+#endif
+
+ init_wait_for_inferior ();
+
+ /* Set up the "saved terminal modes" of the inferior
+ based on what modes we are starting it with. */
+ target_terminal_init ();
+
+ /* Install inferior's terminal modes. */
+ target_terminal_inferior ();
+
+ while (1)
+ {
+ stop_soon_quietly = 1; /* Make wait_for_inferior be quiet */
+ wait_for_inferior ();
+ if (stop_signal != SIGTRAP)
+ {
+ /* Let shell child handle its own signals in its own way */
+ /* FIXME, what if child has exit()ed? Must exit loop somehow */
+ resume (0, stop_signal);
+ }
+ else
+ {
+ /* We handle SIGTRAP, however; it means child did an exec. */
+ if (0 == --pending_execs)
+ break;
+ resume (0, 0); /* Just make it go on */
+ }
+ }
+ stop_soon_quietly = 0;
+
+ /* We are now in the child process of interest, having exec'd the
+ correct program, and are poised at the first instruction of the
+ new program. */
+#ifdef SOLIB_CREATE_INFERIOR_HOOK
+ SOLIB_CREATE_INFERIOR_HOOK (pid);
+#endif
+
+ /* Pedal to the metal. Away we go. */
+ proceed ((CORE_ADDR) -1, 0, 0);
+}
+
+static void
+child_mourn_inferior ()
+{
+ unpush_target (&child_ops);
+ generic_mourn_inferior ();
+}
+
+static int
+child_can_run ()
+{
+ return(1);
+}
+
struct target_ops child_ops = {
"child", /* to_shortname */
"Unix child process", /* to_longname */
0, /* to_lookup_symbol */
child_create_inferior, /* to_create_inferior */
child_mourn_inferior, /* to_mourn_inferior */
+ child_can_run, /* to_can_run */
process_stratum, /* to_stratum */
0, /* to_next */
1, /* to_has_all_memory */
projects / platform / upstream / binutils.git / commitdiff