/* Fork a Unix child process, and set up to debug it, for GDB.
Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000,
- 2001, 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
+ 2001, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
+ Free Software Foundation, Inc.
Contributed by Cygnus Support.
#include "defs.h"
#include "gdb_string.h"
-#include "frame.h" /* required by inferior.h */
#include "inferior.h"
+#include "terminal.h"
#include "target.h"
#include "gdb_wait.h"
#include "gdb_vfork.h"
static void
breakup_args (char *scratch, char **argv)
{
- char *cp = scratch;
+ char *cp = scratch, *tmp;
for (;;)
{
*argv++ = cp;
/* Scan for next arg separator. */
- cp = strchr (cp, ' ');
- if (cp == NULL)
- cp = strchr (cp, '\t');
- if (cp == NULL)
- cp = strchr (cp, '\n');
+ tmp = strchr (cp, ' ');
+ if (tmp == NULL)
+ tmp = strchr (cp, '\t');
+ if (tmp == NULL)
+ tmp = strchr (cp, '\n');
/* No separators => end of string => break. */
- if (cp == NULL)
+ if (tmp == NULL)
break;
+ cp = tmp;
/* Replace the separator with a terminator. */
*cp++ = '\0';
/* This function is NOT reentrant. Some of the variables have been
made static to ensure that they survive the vfork call. */
-void
+int
fork_inferior (char *exec_file_arg, char *allargs, char **env,
void (*traceme_fun) (void), void (*init_trace_fun) (int),
void (*pre_trace_fun) (void), char *shell_file_arg)
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. */
+ /* 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. */
int shell = 0;
static char **argv;
const char *inferior_io_terminal = get_inferior_io_terminal ();
+ struct inferior *inf;
/* If no exec file handed to us, get it from the exec-file command
-- with a good, common error message if none is specified. */
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]);
/* 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. */
+ the parent and child flushing the same data after the fork. */
gdb_flush (gdb_stdout);
gdb_flush (gdb_stderr);
in a separate process group. */
debug_setpgrp = gdb_setpgid ();
if (debug_setpgrp == -1)
- perror ("setpgrp failed in child");
+ perror (_("setpgrp failed in child"));
}
/* Ask the tty subsystem to switch to the one we specified
initialize_signals for how we get the right signal handlers
for the inferior. */
- /* "Trace me, Dr. Memory!" */
+ /* "Trace me, Dr. Memory!" */
(*traceme_fun) ();
/* The call above set this process (the "child") as debuggable
/* Otherwise, we directly exec the target program with
execvp. */
int i;
- char *errstring;
execvp (exec_file, argv);
/* If we get here, it's an error. */
- errstring = safe_strerror (errno);
+ safe_strerror (errno);
fprintf_unfiltered (gdb_stderr, "Cannot exec %s ", exec_file);
i = 1;
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 ();
+ if (!have_inferiors ())
+ init_thread_list ();
- add_inferior (pid);
+ inf = current_inferior ();
+
+ inferior_appeared (inf, pid);
/* Needed for wait_for_inferior stuff below. */
inferior_ptid = pid_to_ptid (pid);
+ new_tty_postfork ();
+
/* 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
/* Now that we have a child process, make it our target, and
initialize anything target-vector-specific that needs
initializing. */
- (*init_trace_fun) (pid);
+ 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. */
+ return pid;
}
/* Accept NTRAPS traps from the inferior. */
{
int pending_execs = ntraps;
int terminal_initted = 0;
+ ptid_t resume_ptid;
+
+ if (target_supports_multi_process ())
+ resume_ptid = pid_to_ptid (ptid_get_pid (inferior_ptid));
+ else
+ resume_ptid = minus_one_ptid;
/* The process was started by the fork that created it, but it will
have stopped one instruction after execing the shell. Here we
while (1)
{
- int resume_signal = TARGET_SIGNAL_0;
- ptid_t resume_ptid;
+ enum target_signal resume_signal = TARGET_SIGNAL_0;
ptid_t event_ptid;
struct target_waitstatus ws;
memset (&ws, 0, sizeof (ws));
- event_ptid = target_wait (pid_to_ptid (-1), &ws);
+ event_ptid = target_wait (resume_ptid, &ws, 0);
if (ws.kind == TARGET_WAITKIND_IGNORE)
/* The inferior didn't really stop, keep waiting. */
break;
}
- /* 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. */
}
/* Mark all threads non-executing. */
- set_executing (pid_to_ptid (-1), 0);
-
- stop_pc = read_pc ();
+ set_executing (resume_ptid, 0);
}
/* Implement the "unset exec-wrapper" command. */
exec_wrapper = NULL;
}
+/* Provide a prototype to silence -Wmissing-prototypes. */
+extern initialize_file_ftype _initialize_fork_child;
+
void
_initialize_fork_child (void)
{
projects / deliverable / binutils-gdb.git / blobdiff