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107 lines
4.0 KiB
C++
107 lines
4.0 KiB
C++
/* Functions and data responsible for forking the inferior process.
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Copyright (C) 1986-2018 Free Software Foundation, Inc.
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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
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it under the terms of the GNU General Public License as published by
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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,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#ifndef FORK_INFERIOR_H
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#define FORK_INFERIOR_H
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#include <string>
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/* Number of traps that happen between exec'ing the shell to run an
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inferior and when we finally get to the inferior code, not counting
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the exec for the shell. This is 1 on all supported
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implementations. */
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#define START_INFERIOR_TRAPS_EXPECTED 1
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/* Start an inferior Unix child process and sets inferior_ptid to its
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pid. EXEC_FILE is the file to run. ALLARGS is a string containing
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the arguments to the program. ENV is the environment vector to
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pass. SHELL_FILE is the shell file, or NULL if we should pick
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one. EXEC_FUN is the exec(2) function to use, or NULL for the default
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one. */
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/* This function is NOT reentrant. Some of the variables have been
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made static to ensure that they survive the vfork call. */
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extern pid_t fork_inferior (const char *exec_file_arg,
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const std::string &allargs,
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char **env, void (*traceme_fun) (),
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void (*init_trace_fun) (int),
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void (*pre_trace_fun) (),
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const char *shell_file_arg,
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void (*exec_fun) (const char *file,
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char * const *argv,
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char * const *env));
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/* Accept NTRAPS traps from the inferior.
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Return the ptid of the inferior being started. */
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extern ptid_t startup_inferior (pid_t pid, int ntraps,
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struct target_waitstatus *mystatus,
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ptid_t *myptid);
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/* Whether to start up the debuggee under a shell.
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If startup-with-shell is set, GDB's "run" will attempt to start up
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the debuggee under a shell. This also happens when using GDBserver
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under extended remote mode.
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This is in order for argument-expansion to occur. E.g.,
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(gdb) run *
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The "*" gets expanded by the shell into a list of files.
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While this is a nice feature, it may be handy to bypass the shell
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in some cases. To disable this feature, do "set startup-with-shell
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false".
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The catch-exec traps expected during start-up will be one more if
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the target is started up with a shell. */
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extern int startup_with_shell;
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/* Perform any necessary tasks before a fork/vfork takes place. ARGS
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is a string containing all the arguments received by the inferior.
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This function is mainly used by fork_inferior. */
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extern void prefork_hook (const char *args);
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/* Perform any necessary tasks after a fork/vfork takes place. This
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function is mainly used by fork_inferior. */
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extern void postfork_hook (pid_t pid);
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/* Perform any necessary tasks *on the child* after a fork/vfork takes
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place. This function is mainly used by fork_inferior. */
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extern void postfork_child_hook ();
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/* Flush both stdout and stderr. This function needs to be
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implemented differently on GDB and GDBserver. */
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extern void gdb_flush_out_err ();
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/* Report an error that happened when starting to trace the inferior
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(i.e., when the "traceme_fun" callback is called on fork_inferior)
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and bail out. This function does not return. */
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extern void trace_start_error (const char *fmt, ...)
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ATTRIBUTE_NORETURN ATTRIBUTE_PRINTF (1, 2);
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/* Like "trace_start_error", but the error message is constructed by
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combining STRING with the system error message for errno. This
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function does not return. */
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extern void trace_start_error_with_name (const char *string)
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ATTRIBUTE_NORETURN;
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#endif /* ! FORK_INFERIOR_H */
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