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/* Utility functions used by tools like collect2 and lto-wrapper.
Copyright (C) 2009-2016 Free Software Foundation, Inc.
This file is part of GCC.
GCC 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, or (at your option) any later
version.
GCC 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 GCC; see the file COPYING3. If not see
<http://www.gnu.org/licenses/>. */
#include "config.h"
#include "system.h"
#include "coretypes.h"
#include "intl.h"
#include "diagnostic.h"
#include "obstack.h"
#include "opts.h"
#include "options.h"
#include "simple-object.h"
#include "lto-section-names.h"
#include "collect-utils.h"
static char *response_file;
bool debug;
bool verbose;
bool save_temps;
/* Notify user of a non-error. */
void
notice (const char *cmsgid, ...)
{
va_list ap;
va_start (ap, cmsgid);
vfprintf (stderr, _(cmsgid), ap);
va_end (ap);
}
void
fatal_signal (int signum)
{
signal (signum, SIG_DFL);
utils_cleanup (true);
/* Get the same signal again, this time not handled,
so its normal effect occurs. */
kill (getpid (), signum);
}
/* Wait for a process to finish, and exit if a nonzero status is found. */
int
collect_wait (const char *prog, struct pex_obj *pex)
{
int status;
if (!pex_get_status (pex, 1, &status))
fatal_error (input_location, "can't get program status: %m");
pex_free (pex);
if (response_file && !save_temps)
{
unlink (response_file);
response_file = NULL;
}
if (status)
{
if (WIFSIGNALED (status))
{
int sig = WTERMSIG (status);
fatal_error (input_location, "%s terminated with signal %d [%s]%s",
prog, sig, strsignal (sig),
WCOREDUMP (status) ? ", core dumped" : "");
}
if (WIFEXITED (status))
return WEXITSTATUS (status);
}
return 0;
}
void
do_wait (const char *prog, struct pex_obj *pex)
{
int ret = collect_wait (prog, pex);
if (ret != 0)
fatal_error (input_location, "%s returned %d exit status", prog, ret);
}
/* Execute a program, and wait for the reply. */
struct pex_obj *
collect_execute (const char *prog, char **argv, const char *outname,
const char *errname, int flags, bool use_atfile)
{
struct pex_obj *pex;
const char *errmsg;
int err;
char *response_arg = NULL;
char *response_argv[3];
if (use_atfile && argv[0] != NULL)
{
/* If using @file arguments, create a temporary file and put the
contents of argv into it. Then change argv to an array corresponding
to a single argument @FILE, where FILE is the temporary filename. */
char **current_argv = argv + 1;
char *argv0 = argv[0];
int status;
FILE *f;
/* Note: we assume argv contains at least one element; this is
checked above. */
response_file = make_temp_file ("");
f = fopen (response_file, "w");
if (f == NULL)
fatal_error (input_location, "could not open response file %s",
response_file);
status = writeargv (current_argv, f);
if (status)
fatal_error (input_location, "could not write to response file %s",
response_file);
status = fclose (f);
if (EOF == status)
fatal_error (input_location, "could not close response file %s",
response_file);
response_arg = concat ("@", response_file, NULL);
response_argv[0] = argv0;
response_argv[1] = response_arg;
response_argv[2] = NULL;
argv = response_argv;
}
if (verbose || debug)
{
char **p_argv;
const char *str;
if (argv[0])
fprintf (stderr, "%s", argv[0]);
else
notice ("[cannot find %s]", prog);
for (p_argv = &argv[1]; (str = *p_argv) != (char *) 0; p_argv++)
fprintf (stderr, " %s", str);
fprintf (stderr, "\n");
}
fflush (stdout);
fflush (stderr);
/* If we cannot find a program we need, complain error. Do this here
since we might not end up needing something that we could not find. */
if (argv[0] == 0)
fatal_error (input_location, "cannot find '%s'", prog);
pex = pex_init (0, "collect2", NULL);
if (pex == NULL)
fatal_error (input_location, "pex_init failed: %m");
errmsg = pex_run (pex, flags, argv[0], argv, outname,
errname, &err);
if (errmsg != NULL)
{
if (err != 0)
{
errno = err;
fatal_error (input_location, "%s: %m", _(errmsg));
}
else
fatal_error (input_location, errmsg);
}
free (response_arg);
return pex;
}
void
fork_execute (const char *prog, char **argv, bool use_atfile)
{
struct pex_obj *pex;
pex = collect_execute (prog, argv, NULL, NULL,
PEX_LAST | PEX_SEARCH, use_atfile);
do_wait (prog, pex);
}
/* Delete tempfiles. */
void
utils_cleanup (bool from_signal)
{
static bool cleanup_done = false;
if (cleanup_done)
return;
/* Setting cleanup_done prevents an infinite loop if one of the
calls to maybe_unlink fails. */
cleanup_done = true;
tool_cleanup (from_signal);
}
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