old-cross-binutils/gdb/fork-child.c

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/* Fork a Unix child process, and set up to debug it, for GDB.
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Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000,
2001, 2004, 2005, 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
Contributed by Cygnus Support.
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This file is part of GDB.
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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 3 of the License, or
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(at your option) any later version.
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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.
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You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "gdb_string.h"
#include "frame.h" /* required by inferior.h */
#include "inferior.h"
#include "target.h"
#include "gdb_wait.h"
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#include "gdb_vfork.h"
#include "gdbcore.h"
#include "terminal.h"
#include "gdbthread.h"
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#include "command.h" /* for dont_repeat () */
#include "gdbcmd.h"
* solib.h (CLEAR_SOLIB, SOLIB_ADD) (SOLIB_CREATE_INFERIOR_HOOK, SOLIB_REMOVE_INFERIOR_HOOK) (SOLIB_IN_DYNAMIC_LINKER, SOLIB_RESTART) (DISABLE_UNSETTABLE_BREAK, PC_SOLIB) (IN_SOLIB_DYNSYM_RESOLVE_CODE): Remove defines and orphaned comments. * breakpoint.c: Include "solib.h". (insert_bp_location) [!DISABLE_UNSETTABLE_BREAK]: Call solib_address. (remove_solib_event_breakpoints, create_solib_event_breakpoint) (disable_breakpoints_in_shlibs) (disable_breakpoints_in_unloaded_shlib) (re_enable_breakpoints_in_shlibs): Compile if SOLIB_ADD isn't defined. If PC_SOLIB isn't defined, call solib_address. (_initialize_breakpoint): Unconditionally install observer. * corelow.c: Include "solib.h". [SOLIB_ADD] (solib_add_stub): Remove prototype. (core_close) [!CLEAR_SOLIB]: Call clear_solib. (solib_add_stub) [!SOLIB_ADD] Call solib_add. (core_open): Unconditionally call solib_add_stub. * fork-child.c: Include "solib.h". (fork_inferior) [!SOLIB_CREATE_INFERIOR_HOOK]: Call solib_create_inferior_hook. * infcmd.c: Include "solib.h". (attach_command) [!SOLIB_ADD]: Call shlib_rescan. Unconditionally call re_enable_breakpoints_in_shlibs. * infrun.c: Include "solib.h". (SOLIB_IN_SYNSYM_RESOLVE_CODE): Don't define if not already defined. (stop_on_solib_events, show_stop_on_solib_events): Include unconditionally. (follow_exec) [!SOLIB_CREATE_INFERIOR_HOOK]: Call solib_create_inferior_hook. (handle_inferior_event) [!SOLIB_ADD]: Call shlib_add. [!IN_SOLIB_DYNSYM_RESOLVE_CODE]: Call in_solib_dynsym_resolve_code. (_initialize_infrun): Unconditionally add "stop_on_solib-events" command. * remote.c: Include "solib.h". (remote_open_1): Unconditionally call no_shared_libraries. [!SOLIB_CREATE_INFERIOR_HOOK] Call solib_create_inferior_hook. * stack.c: Include "solib.h". (print_frame) [!PC_SOLIB] Call shlib_for_pc. * xcoffsolib.c (no_shared_libraries): Remove function. * Makefile.in (SFILES): Add solib.c. (ALLDEPFILES): Remove solib.c. (COMMON_OBS): Add solib.o. (breakpoint.o, corelow.o, fork-chiled.o, infcmd.o, infrun.o) (remote.o, stack.o): Update dependencies.
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#include "solib.h"
#include <signal.h>
/* This just gets used as a default if we can't find SHELL. */
#define SHELL_FILE "/bin/sh"
extern char **environ;
static char *exec_wrapper;
/* Break up SCRATCH into an argument vector suitable for passing to
execvp and store it in ARGV. E.g., on "run a b c d" this routine
would get as input the string "a b c d", and as output it would
fill in ARGV with the four arguments "a", "b", "c", "d". */
static void
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breakup_args (char *scratch, char **argv)
{
char *cp = scratch;
for (;;)
{
/* Scan past leading separators */
while (*cp == ' ' || *cp == '\t' || *cp == '\n')
cp++;
/* Break if at end of string. */
if (*cp == '\0')
break;
/* Take an arg. */
*argv++ = cp;
/* Scan for next arg separator. */
cp = strchr (cp, ' ');
if (cp == NULL)
cp = strchr (cp, '\t');
if (cp == NULL)
cp = strchr (cp, '\n');
/* No separators => end of string => break. */
if (cp == NULL)
break;
/* Replace the separator with a terminator. */
*cp++ = '\0';
}
/* Null-terminate the vector. */
*argv = NULL;
}
/* When executing a command under the given shell, return non-zero if
the '!' character should be escaped when embedded in a quoted
command-line argument. */
static int
escape_bang_in_quoted_argument (const char *shell_file)
{
const int shell_file_len = strlen (shell_file);
/* Bang should be escaped only in C Shells. For now, simply check
that the shell name ends with 'csh', which covers at least csh
and tcsh. This should be good enough for now. */
if (shell_file_len < 3)
return 0;
if (shell_file[shell_file_len - 3] == 'c'
&& shell_file[shell_file_len - 2] == 's'
&& shell_file[shell_file_len - 1] == 'h')
return 1;
return 0;
}
/* 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. SHELL_FILE is the shell file, or NULL if we should pick
one. */
/* This function is NOT reentrant. Some of the variables have been
made static to ensure that they survive the vfork call. */
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Kill pthread_ops_hack * target.h (struct target_ops): Make to_attach, to_detach, to_create_inferior and to_mourn_inferior accept a pointer to struct target_ops. (target_attach, target_create_inferior, target_create_inferior): Convert from macros to function. Find the right target to invoke a method of. (find_default_attach, find_default_create_inferior): New parameter ops. * corefile.c (core_file_command): Pass target to to_detach. * corelow.c (core_detach): Add 'ops' parameter. * fork-child.c (fork_inferior): Return the pid. Allow init_trace_fun to be NULL. * inf-ptrace (ptrace_ops_hack): Remove. (inf_ptrace_him): Remove, moving all logic into.... (inf_ptrace_create_inferior): ... here. Push the target passed as parameter. (inf_ptrace_mourn_inferior, inf_ptrace_attach, inf_ptrace_detach): Push/pop target passed as parameter, no ptrace_ops_hack. (inf_ptrace_target): Don't remember result. * inferior.h (fork_inferior): Adjust prototype. * linux-nat.c (linux_nat_create_inferior, linux_nat_attach) (linux_nat_detach, linux_nat_mourn_inferior): New parameter ops. Pass it to linux_ops target. * linux-thread-db.c (thread_db_detach, thread_db_mourn_inferior): New parameter ops. Pass it to the target beneath. * remote.c (remote_mourn, extended_remote_mourn, remote_detach) (extended_remote_create_inferior): New parameter ops. Pass it further. * target.c (debug_to_attach, debug_to_detach) (debug_to_mourn_inferior): New parameter ops. (target_create_inferior): New. (update_current_target): Do not inherit to_attach, to_detach, to_create_inferiour, to_mourn_inferior. Do not default to_detach and to_mourn_inferior. (target_detach): Find the right target to use. (target_mourn_inferior): New. (find_default_attach, find_default_create_inferior): New parameter ops. Pass the found target when calling its method. (init_dummy_target): Provide fallback definition of to_detach. (target_attach): New. (debug_to_attach, debug_to_detach, debug_to_create_inferior) (debug_to_mourn_inferiour): New parameter ops. * aix-thread.c: Adjust. * bsd-uthread.c: Adjust. * gnu-nat.c: Adjust. * go32-nat.c: Adjust. * hpux-thread.c: Adjust. * inf-ttrace.c: Ajust. * monitor.c: Adjust. * nto-procfs.c: Adjust. * procfs.c: Adjust. * remote-m32r-sdi.c: Adjust. * remote-mips.c: Adjust. * remote-sim.c: Adjust. * rs6000-nat.c: Adjust. * sol-thread.c: Adjust. * win32-nat.c: Adjust. * dec-thread.c: Adjust.
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int
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fork_inferior (char *exec_file_arg, char *allargs, char **env,
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void (*traceme_fun) (void), void (*init_trace_fun) (int),
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void (*pre_trace_fun) (void), char *shell_file_arg)
{
int pid;
char *shell_command;
static char default_shell_file[] = SHELL_FILE;
int len;
/* 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;
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static char *shell_file;
static char *exec_file;
char **save_our_env;
int shell = 0;
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static char **argv;
Index: gdb/ChangeLog +2005-07-06 Bob Rossi <bob@brasko.net> + + * fork-child.c (fork-inferior): Use accessor function for + inferior_io_terminal. + * infcmd.c (inferior_io_terminal): Make static. + (set_inferior_io_terminal): New function. + (get_inferior_io_terminal): Ditto. + (tty_command): Use accessor function. + (_initialize_infcmd): Add inferior_tty setshow variable. + (_initialize_infcmd): Remove tty command. + (_initialize_infcmd): Add a tty command that is an alias. + * inferior.h (set_inferior_io_terminal): New prototype. + (get_inferior_io_terminal): Ditto. + (new_tty_prefork): Add const qualifier to parameter. + * inflow.c (inferior_thisrun_terminal): Add const qualifier. + (new_tty_prefork): Add const qualifier to parameter. + * nto-procfs (procfs_create_inferior): Use accessor function. + (procfs_create_inferior): Add const qualifier to locals. + * win32-nat.c (child_create_inferior): Ditto. + * mi/mi-cmd-env.c (mi_cmd_inferior_tty_set): New function. + (mi_cmd_inferior_tty_set): Ditto. + * mi/mi-cmds.c (mi_cmds): Add inferior-tty-set and inferior-tty-show + * mi/mi-cmds.h (mi_cmd_inferior_tty_set): Add prototype. + (mi_cmd_inferior_tty_show): Ditto. Index: gdb/doc/ChangeLog +2005-07-06 Bob Rossi <bob@brasko.net> + + * gdb.texinfo (GDB/MI Miscellaneous Commands): Add -inferior-tty-set + and -inferior-tty-show. + (Input/Output): Document "set/show inferior-tty" and tty alias. Index: gdb/testsuite/ChangeLog +2005-07-06 Bob Rossi <bob@brasko.net> + + * gdb.mi/mi-basics.exp (test_setshow_inferior_tty): Test MI tty + command. + (Copyright): Update copyright.
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const char *inferior_io_terminal = get_inferior_io_terminal ();
/* If no exec file handed to us, get it from the exec-file command
-- with a good, common error message if none is specified. */
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exec_file = exec_file_arg;
if (exec_file == 0)
exec_file = get_exec_file (1);
/* STARTUP_WITH_SHELL is defined in inferior.h. If 0,e we'll just
do a fork/exec, no shell, so don't bother figuring out what
shell. */
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shell_file = shell_file_arg;
if (STARTUP_WITH_SHELL)
{
/* Figure out what shell to start up the user program under. */
if (shell_file == NULL)
shell_file = getenv ("SHELL");
if (shell_file == NULL)
shell_file = default_shell_file;
shell = 1;
}
/* Multiplying the length of exec_file by 4 is to account for the
fact that it may expand when quoted; it is a worst-case number
based on every character being '. */
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len = 5 + 4 * strlen (exec_file) + 1 + strlen (allargs) + 1 + /*slop */ 12;
if (exec_wrapper)
len += strlen (exec_wrapper) + 1;
shell_command = (char *) alloca (len);
shell_command[0] = '\0';
if (!shell)
{
/* We're going to call execvp. Create argument vector.
Calculate an upper bound on the length of the vector by
assuming that every other character is a separate
argument. */
int argc = (strlen (allargs) + 1) / 2 + 2;
argv = (char **) xmalloc (argc * sizeof (*argv));
argv[0] = exec_file;
breakup_args (allargs, &argv[1]);
}
else
{
/* We're going to call a shell. */
char *p;
int need_to_quote;
const int escape_bang = escape_bang_in_quoted_argument (shell_file);
strcat (shell_command, "exec ");
/* Add any exec wrapper. That may be a program name with arguments, so
the user must handle quoting. */
if (exec_wrapper)
{
strcat (shell_command, exec_wrapper);
strcat (shell_command, " ");
}
/* Now add exec_file, quoting as necessary. */
/* Quoting in this style is said to work with all shells. But
csh on IRIX 4.0.1 can't deal with it. So we only quote it if
we need to. */
p = exec_file;
while (1)
{
switch (*p)
{
case '\'':
case '!':
case '"':
case '(':
case ')':
case '$':
case '&':
case ';':
case '<':
case '>':
case ' ':
case '\n':
case '\t':
need_to_quote = 1;
goto end_scan;
case '\0':
need_to_quote = 0;
goto end_scan;
default:
break;
}
++p;
}
end_scan:
if (need_to_quote)
{
strcat (shell_command, "'");
for (p = exec_file; *p != '\0'; ++p)
{
if (*p == '\'')
strcat (shell_command, "'\\''");
else if (*p == '!' && escape_bang)
strcat (shell_command, "\\!");
else
strncat (shell_command, p, 1);
}
strcat (shell_command, "'");
}
else
strcat (shell_command, exec_file);
strcat (shell_command, " ");
strcat (shell_command, allargs);
}
/* On some systems an exec will 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. */
gdb_flush (gdb_stdout);
gdb_flush (gdb_stderr);
/* If there's any initialization of the target layers that must
happen to prepare to handle the child we're about fork, do it
now... */
if (pre_trace_fun != NULL)
(*pre_trace_fun) ();
/* Create the child process. Since the child process is going to
exec(3) shortly afterwards, try to reduce the overhead by
calling vfork(2). However, if PRE_TRACE_FUN is non-null, it's
likely that this optimization won't work since there's too much
work to do between the vfork(2) and the exec(3). This is known
to be the case on ttrace(2)-based HP-UX, where some handshaking
between parent and child needs to happen between fork(2) and
exec(2). However, since the parent is suspended in the vforked
state, this doesn't work. Also note that the vfork(2) call might
actually be a call to fork(2) due to the fact that autoconf will
``#define vfork fork'' on certain platforms. */
if (pre_trace_fun || debug_fork)
pid = fork ();
else
pid = vfork ();
if (pid < 0)
2005-02-11 Andrew Cagney <cagney@gnu.org> Mark up error_no_arg, query, perror_with_name, complaint, and internal_error. * breakpoint.c, cp-abi.c, cp-namespace.c, cp-support.c: Update. * cris-tdep.c, dbxread.c, dictionary.c, dsrec.c: Update. * dummy-frame.c, dve3900-rom.c, dwarf2-frame.c, dwarf2expr.c: Update. * dwarf2read.c, dwarfread.c, elfread.c, event-loop.c: Update. * exceptions.c, exec.c, f-lang.c, findvar.c, fork-child.c: Update. * frame-unwind.c, frame.c, frv-linux-tdep.c, frv-tdep.c: Update. * gdb_assert.h, gdbarch.c, gdbtypes.c, gnu-nat.c: Update. * go32-nat.c, hppa-tdep.c, hppabsd-nat.c, hpread.c: Update. * i386-linux-nat.c, i386-nat.c, i386-tdep.c, i386bsd-nat.c: Update. * i386fbsd-nat.c, inf-ptrace.c, inf-ttrace.c, infcall.c: Update. * infcmd.c, inflow.c, infptrace.c, infrun.c, inftarg.c: Update. * interps.c, language.c, linespec.c, linux-nat.c: Update. * m32r-linux-nat.c, m68k-tdep.c, m68kbsd-nat.c: Update. * m68klinux-nat.c, m88kbsd-nat.c, macroexp.c, macroscope.c: Update. * macrotab.c, maint.c, mdebugread.c, memattr.c: Update. * mips-linux-tdep.c, mips-tdep.c, mips64obsd-nat.c: Update. * mipsnbsd-nat.c, mn10300-tdep.c, monitor.c, nto-procfs.c: Update. * objc-lang.c, objfiles.c, objfiles.h, ocd.c, osabi.c: Update. * parse.c, ppc-bdm.c, ppc-linux-nat.c, ppc-sysv-tdep.c: Update. * ppcnbsd-nat.c, ppcobsd-nat.c, printcmd.c, procfs.c: Update. * regcache.c, reggroups.c, remote-e7000.c, remote-mips.c: Update. * remote-rdp.c, remote-sds.c, remote-sim.c, remote-st.c: Update. * remote-utils.c, remote.c, rs6000-nat.c, rs6000-tdep.c: Update. * s390-nat.c, s390-tdep.c, sentinel-frame.c, serial.c: Update. * sh-tdep.c, sh3-rom.c, sh64-tdep.c, shnbsd-nat.c: Update. * solib-aix5.c, solib-svr4.c, solib.c, source.c: Update. * sparc-nat.c, stabsread.c, stack.c, symfile.c, symtab.c: Update. * symtab.h, target.c, tracepoint.c, ui-file.c, ui-out.c: Update. * utils.c, valops.c, valprint.c, vax-nat.c, vaxbsd-nat.c: Update. * win32-nat.c, xcoffread.c, xstormy16-tdep.c: Update. * cli/cli-cmds.c, cli/cli-logging.c, cli/cli-script.c: Update. * cli/cli-setshow.c, mi/mi-cmd-break.c, mi/mi-cmds.c: Update. * mi/mi-console.c, mi/mi-getopt.c, mi/mi-out.c: Update. * tui/tui-file.c, tui/tui-interp.c: Update.
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perror_with_name (("vfork"));
if (pid == 0)
{
if (debug_fork)
sleep (debug_fork);
/* Create a new session for the inferior process, if necessary.
It will also place the inferior in a separate process group. */
if (create_tty_session () <= 0)
{
/* No session was created, but we still want to run the inferior
in a separate process group. */
debug_setpgrp = gdb_setpgid ();
if (debug_setpgrp == -1)
perror ("setpgrp failed in child");
}
/* 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
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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. */
/* "Trace me, Dr. Memory!" */
(*traceme_fun) ();
/* The call above set this process (the "child") as debuggable
by the original gdb process (the "parent"). Since processes
(unlike people) can have only one parent, if you are debugging
gdb itself (and your debugger is thus _already_ the
controller/parent for this child), code from here on out is
undebuggable. Indeed, you probably got an error message
saying "not parent". Sorry; you'll have to use print
statements! */
/* There is no execlpe call, so we have to set the environment
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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;
/* If we decided above to start up with a shell, we exec the
shell, "-c" says to interpret the next arg as a shell command
to execute, and this command is "exec <target-program>
<args>". */
if (shell)
{
execlp (shell_file, shell_file, "-c", shell_command, (char *) 0);
/* If we get here, it's an error. */
fprintf_unfiltered (gdb_stderr, "Cannot exec %s: %s.\n", shell_file,
safe_strerror (errno));
gdb_flush (gdb_stderr);
_exit (0177);
}
else
{
/* Otherwise, we directly exec the target program with
execvp. */
int i;
char *errstring;
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execvp (exec_file, argv);
/* If we get here, it's an error. */
errstring = safe_strerror (errno);
fprintf_unfiltered (gdb_stderr, "Cannot exec %s ", exec_file);
i = 1;
while (argv[i] != NULL)
{
if (i != 1)
fprintf_unfiltered (gdb_stderr, " ");
fprintf_unfiltered (gdb_stderr, "%s", argv[i]);
i++;
}
fprintf_unfiltered (gdb_stderr, ".\n");
#if 0
/* This extra info seems to be useless. */
fprintf_unfiltered (gdb_stderr, "Got error %s.\n", errstring);
#endif
gdb_flush (gdb_stderr);
_exit (0177);
}
}
/* Restore our environment in case a vforked child clob'd it. */
environ = save_our_env;
init_thread_list ();
* gnu-nat.c (gnu_attach): Add process to inferiors table. (gnu_detach): Remove it. * go32-nat.c (go32_create_inferior): Add process to gdb's inferior table. * inf-ptrace.c (inf_ptrace_follow_fork): Delete and add inferiors to inferior table accordingly. (inf_ptrace_attach): Add new process to inferior table. (inf_ptrace_detach): Remove it. * inf-ttrace.c (inf_ttrace_follow_fork): Delete and add inferiors to inferior table accordingly. (inf_ttrace_attach): Add process to inferior table. (inf_ttrace_detach): Remove it. * linux-fork.c (init_fork_list): Delete any left over inferior. (linux_fork_mourn_inferior, detach_fork_command): Also delete processes from inferior list. * monitor.c (monitor_open): Add process to inferior list. (monitor_close): Remove it. * nto-procfs.c (procfs_attach): Add process to inferior list. Find threads after pushing the target. (procfs_detach): Remove process from inferior list. (procfs_create_inferior): Add process to inferior list. * procfs.c (procfs_detach): Remove process from inferior list. (do_attach): Add process to inferior list. * remote-sim.c (sim_create_inferior): Add process to inferior list. (gdbsim_close): Remove it. * target.c (generic_mourn_inferior): If inferior_ptid is not null_ptid, remove the corresponding inferior from inferior list. * win32-nat.c (do_initial_win32_stuff): Add process to inferior list. (win32_detach): Remove it. * linux-nat.c (linux_child_follow_fork): Delete and add inferiors to inferior list accordingly. * fork-child.c (fork_inferior): Add process to inferior list. * corelow.c (CORELOW_PID): Define. (core_close): Remove core from inferior list. (core_open): Add it.
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add_inferior (pid);
/* Needed for wait_for_inferior stuff below. */
inferior_ptid = pid_to_ptid (pid);
/* We have something that executes now. We'll be running through
the shell at this point, but the pid shouldn't change. Targets
supporting MT should fill this task's ptid with more data as soon
as they can. */
add_thread_silent (inferior_ptid);
/* Now that we have a child process, make it our target, and
initialize anything target-vector-specific that needs
initializing. */
Kill pthread_ops_hack * target.h (struct target_ops): Make to_attach, to_detach, to_create_inferior and to_mourn_inferior accept a pointer to struct target_ops. (target_attach, target_create_inferior, target_create_inferior): Convert from macros to function. Find the right target to invoke a method of. (find_default_attach, find_default_create_inferior): New parameter ops. * corefile.c (core_file_command): Pass target to to_detach. * corelow.c (core_detach): Add 'ops' parameter. * fork-child.c (fork_inferior): Return the pid. Allow init_trace_fun to be NULL. * inf-ptrace (ptrace_ops_hack): Remove. (inf_ptrace_him): Remove, moving all logic into.... (inf_ptrace_create_inferior): ... here. Push the target passed as parameter. (inf_ptrace_mourn_inferior, inf_ptrace_attach, inf_ptrace_detach): Push/pop target passed as parameter, no ptrace_ops_hack. (inf_ptrace_target): Don't remember result. * inferior.h (fork_inferior): Adjust prototype. * linux-nat.c (linux_nat_create_inferior, linux_nat_attach) (linux_nat_detach, linux_nat_mourn_inferior): New parameter ops. Pass it to linux_ops target. * linux-thread-db.c (thread_db_detach, thread_db_mourn_inferior): New parameter ops. Pass it to the target beneath. * remote.c (remote_mourn, extended_remote_mourn, remote_detach) (extended_remote_create_inferior): New parameter ops. Pass it further. * target.c (debug_to_attach, debug_to_detach) (debug_to_mourn_inferior): New parameter ops. (target_create_inferior): New. (update_current_target): Do not inherit to_attach, to_detach, to_create_inferiour, to_mourn_inferior. Do not default to_detach and to_mourn_inferior. (target_detach): Find the right target to use. (target_mourn_inferior): New. (find_default_attach, find_default_create_inferior): New parameter ops. Pass the found target when calling its method. (init_dummy_target): Provide fallback definition of to_detach. (target_attach): New. (debug_to_attach, debug_to_detach, debug_to_create_inferior) (debug_to_mourn_inferiour): New parameter ops. * aix-thread.c: Adjust. * bsd-uthread.c: Adjust. * gnu-nat.c: Adjust. * go32-nat.c: Adjust. * hpux-thread.c: Adjust. * inf-ttrace.c: Ajust. * monitor.c: Adjust. * nto-procfs.c: Adjust. * procfs.c: Adjust. * remote-m32r-sdi.c: Adjust. * remote-mips.c: Adjust. * remote-sim.c: Adjust. * rs6000-nat.c: Adjust. * sol-thread.c: Adjust. * win32-nat.c: Adjust. * dec-thread.c: Adjust.
2008-11-09 11:27:18 +00:00
if (init_trace_fun)
(*init_trace_fun) (pid);
/* 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. */
Kill pthread_ops_hack * target.h (struct target_ops): Make to_attach, to_detach, to_create_inferior and to_mourn_inferior accept a pointer to struct target_ops. (target_attach, target_create_inferior, target_create_inferior): Convert from macros to function. Find the right target to invoke a method of. (find_default_attach, find_default_create_inferior): New parameter ops. * corefile.c (core_file_command): Pass target to to_detach. * corelow.c (core_detach): Add 'ops' parameter. * fork-child.c (fork_inferior): Return the pid. Allow init_trace_fun to be NULL. * inf-ptrace (ptrace_ops_hack): Remove. (inf_ptrace_him): Remove, moving all logic into.... (inf_ptrace_create_inferior): ... here. Push the target passed as parameter. (inf_ptrace_mourn_inferior, inf_ptrace_attach, inf_ptrace_detach): Push/pop target passed as parameter, no ptrace_ops_hack. (inf_ptrace_target): Don't remember result. * inferior.h (fork_inferior): Adjust prototype. * linux-nat.c (linux_nat_create_inferior, linux_nat_attach) (linux_nat_detach, linux_nat_mourn_inferior): New parameter ops. Pass it to linux_ops target. * linux-thread-db.c (thread_db_detach, thread_db_mourn_inferior): New parameter ops. Pass it to the target beneath. * remote.c (remote_mourn, extended_remote_mourn, remote_detach) (extended_remote_create_inferior): New parameter ops. Pass it further. * target.c (debug_to_attach, debug_to_detach) (debug_to_mourn_inferior): New parameter ops. (target_create_inferior): New. (update_current_target): Do not inherit to_attach, to_detach, to_create_inferiour, to_mourn_inferior. Do not default to_detach and to_mourn_inferior. (target_detach): Find the right target to use. (target_mourn_inferior): New. (find_default_attach, find_default_create_inferior): New parameter ops. Pass the found target when calling its method. (init_dummy_target): Provide fallback definition of to_detach. (target_attach): New. (debug_to_attach, debug_to_detach, debug_to_create_inferior) (debug_to_mourn_inferiour): New parameter ops. * aix-thread.c: Adjust. * bsd-uthread.c: Adjust. * gnu-nat.c: Adjust. * go32-nat.c: Adjust. * hpux-thread.c: Adjust. * inf-ttrace.c: Ajust. * monitor.c: Adjust. * nto-procfs.c: Adjust. * procfs.c: Adjust. * remote-m32r-sdi.c: Adjust. * remote-mips.c: Adjust. * remote-sim.c: Adjust. * rs6000-nat.c: Adjust. * sol-thread.c: Adjust. * win32-nat.c: Adjust. * dec-thread.c: Adjust.
2008-11-09 11:27:18 +00:00
return pid;
}
/* Accept NTRAPS traps from the inferior. */
void
2000-07-30 01:48:28 +00:00
startup_inferior (int ntraps)
{
int pending_execs = ntraps;
int terminal_initted = 0;
/* 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. */
if (exec_wrapper)
pending_execs++;
while (1)
{
int resume_signal = TARGET_SIGNAL_0;
ptid_t resume_ptid;
ptid_t event_ptid;
struct target_waitstatus ws;
memset (&ws, 0, sizeof (ws));
event_ptid = target_wait (pid_to_ptid (-1), &ws);
if (ws.kind == TARGET_WAITKIND_IGNORE)
/* The inferior didn't really stop, keep waiting. */
continue;
switch (ws.kind)
{
case TARGET_WAITKIND_SPURIOUS:
case TARGET_WAITKIND_LOADED:
case TARGET_WAITKIND_FORKED:
case TARGET_WAITKIND_VFORKED:
case TARGET_WAITKIND_SYSCALL_ENTRY:
case TARGET_WAITKIND_SYSCALL_RETURN:
/* Ignore gracefully during startup of the inferior. */
switch_to_thread (event_ptid);
break;
case TARGET_WAITKIND_SIGNALLED:
target_terminal_ours ();
target_mourn_inferior ();
error (_("During startup program terminated with signal %s, %s."),
target_signal_to_name (ws.value.sig),
target_signal_to_string (ws.value.sig));
return;
case TARGET_WAITKIND_EXITED:
target_terminal_ours ();
target_mourn_inferior ();
if (ws.value.integer)
error (_("During startup program exited with code %d."),
ws.value.integer);
else
error (_("During startup program exited normally."));
return;
case TARGET_WAITKIND_EXECD:
/* Handle EXEC signals as if they were SIGTRAP signals. */
xfree (ws.value.execd_pathname);
resume_signal = TARGET_SIGNAL_TRAP;
switch_to_thread (event_ptid);
break;
case TARGET_WAITKIND_STOPPED:
resume_signal = ws.value.sig;
switch_to_thread (event_ptid);
break;
}
Remove the global stop_signal in favour of a per-thread stop_signal. * inferior.h (stop_signal): Delete. * gdbthread.h (save_infrun_state, load_infrun_state): Remove stop_signal argument. * thread.c (load_infrun_state, save_infrun_state): Remove stop_signal argument. Don't reference it. * infcmd.c (stop_signal): Delete. (program_info): Adjust. * infrun.c (resume): Clear stop_signal. (proceed): Adjust. Pass the last stop_signal to the thread we're resuming. (context_switch): Don't context-switch stop_signal. (handle_inferior_event, keep_going): Adjust. (save_inferior_status, restore_inferior_status): Adjust. * fbsd-nat.c: Include "gdbthread.h". (find_signalled_thread, find_stop_signal): New. (fbsd_make_corefile_notes): Use it. * fork-child.c (startup_inferior): Adjust. * linux-nat.c (get_pending_status): Adjust. (linux_nat_do_thread_registers): Adjust. (find_signalled_thread, find_stop_signal): New. (linux_nat_do_thread_registers): Add stop_signal parameter. (struct linux_nat_corefile_thread_data): Add stop_signal member. (linux_nat_corefile_thread_callback): Pass stop_signal. (linux_nat_do_registers): Delete. (linux_nat_make_corefile_notes): Use find_stop_signal. Assume there's always a thread. * procfs.c (find_signalled_thread, find_stop_signal): New. (find_stop_signal): New. (procfs_do_thread_registers): Add stop_signal parameter. (struct procfs_corefile_thread_data): Add stop_signal member. (procfs_corefile_thread_callback): Pass args->stop_signal. (procfs_make_note_section): Find the last stop_signal. * solib-irix.c: Include gdbthread.h. (irix_solib_create_inferior_hook): Adjust. * solib-osf.c: Include gdbthread.h. (osf_solib_create_inferior_hook): Adjust. * solib-sunos.c: Include gdbthread.h. (sunos_solib_create_inferior_hook): Adjust. * solib-svr4.c: Include gdbthread.h. (svr4_solib_create_inferior_hook): Adjust. * win32-nat.c (do_initial_win32_stuff): Adjust.
2008-09-08 21:51:18 +00:00
/* In all-stop mode, resume all threads. */
if (!non_stop)
resume_ptid = pid_to_ptid (-1);
else
resume_ptid = event_ptid;
if (resume_signal != TARGET_SIGNAL_TRAP)
{
/* Let shell child handle its own signals in its own way. */
target_resume (resume_ptid, 0, resume_signal);
}
else
{
/* We handle SIGTRAP, however; it means child did an exec. */
if (!terminal_initted)
{
/* Now that the child has exec'd we know it has already
set its process group. On POSIX systems, tcsetpgrp
will fail with EPERM if we try it before the child's
setpgid. */
/* Set up the "saved terminal modes" of the inferior
1999-07-07 20:19:36 +00:00
based on what modes we are starting it with. */
target_terminal_init ();
/* Install inferior's terminal modes. */
target_terminal_inferior ();
terminal_initted = 1;
}
if (--pending_execs == 0)
break;
/* Just make it go on. */
target_resume (resume_ptid, 0, TARGET_SIGNAL_0);
}
}
/* Mark all threads non-executing. */
set_executing (pid_to_ptid (-1), 0);
stop_pc = read_pc ();
}
/* Implement the "unset exec-wrapper" command. */
static void
unset_exec_wrapper_command (char *args, int from_tty)
{
xfree (exec_wrapper);
exec_wrapper = NULL;
}
void
_initialize_fork_child (void)
{
add_setshow_filename_cmd ("exec-wrapper", class_run, &exec_wrapper, _("\
Set a wrapper for running programs.\n\
The wrapper prepares the system and environment for the new program."),
_("\
Show the wrapper for running programs."), NULL,
NULL, NULL,
&setlist, &showlist);
add_cmd ("exec-wrapper", class_run, unset_exec_wrapper_command,
_("Disable use of an execution wrapper."),
&unsetlist);
}