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/* Utility functions used by tools like collect2 and lto-wrapper.
Copyright (C) 2009-2014 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;
/* Delete tempfiles. */
void
utils_cleanup (void)
{
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;
if (response_file)
maybe_unlink (response_file);
tool_cleanup ();
}
/* 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 ();
/* Get the same signal again, this time not handled,
so its normal effect occurs. */
kill (getpid (), signum);
}
/* Execute a program, and wait for the reply. ARGV are the arguments. The
last one must be NULL. */
struct pex_obj *
collect_execute (char **argv)
{
struct pex_obj *pex;
const char *errmsg;
int err;
if (verbose)
{
char **p_argv;
const char *str;
for (p_argv = argv; (str = *p_argv) != (char *) 0; p_argv++)
fprintf (stderr, " %s", str);
fprintf (stderr, "\n");
}
fflush (stdout);
fflush (stderr);
pex = pex_init (0, tool_name, NULL);
if (pex == NULL)
fatal_error ("pex_init failed: %m");
/* Do not use PEX_LAST here, we use our stdout for communicating with
collect2 or the linker-plugin. Any output from the sub-process
will confuse that. */
errmsg = pex_run (pex, PEX_SEARCH, argv[0], argv, NULL,
NULL, &err);
if (errmsg != NULL)
{
if (err != 0)
{
errno = err;
fatal_error ("%s: %m", _(errmsg));
}
else
fatal_error (errmsg);
}
return pex;
}
/* Wait for a process to finish, and exit if a nonzero status is found.
PROG is the program name. PEX is the process we should wait for. */
int
collect_wait (const char *prog, struct pex_obj *pex)
{
int status;
if (!pex_get_status (pex, 1, &status))
fatal_error ("can't get program status: %m");
pex_free (pex);
if (status)
{
if (WIFSIGNALED (status))
{
int sig = WTERMSIG (status);
if (WCOREDUMP (status))
fatal_error ("%s terminated with signal %d [%s], core dumped",
prog, sig, strsignal (sig));
else
fatal_error ("%s terminated with signal %d [%s]",
prog, sig, strsignal (sig));
}
if (WIFEXITED (status))
fatal_error ("%s returned %d exit status", prog, 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 ("%s returned %d exit status", prog, ret);
if (response_file && !save_temps)
{
unlink (response_file);
response_file = NULL;
}
}
/* Unlink a temporary LTRANS file unless requested otherwise. */
void
maybe_unlink_file (const char *file)
{
if (!debug)
{
if (unlink_if_ordinary (file)
&& errno != ENOENT)
fatal_error ("deleting file %s: %m", file);
}
else
fprintf (stderr, "[Leaving %s]\n", file);
}
/* Execute program ARGV[0] with arguments ARGV. Wait for it to finish. */
void
fork_execute (char **argv)
{
struct pex_obj *pex;
char *new_argv[3];
char *at_args;
FILE *args;
int status;
response_file = make_temp_file (".args");
at_args = concat ("@", response_file, NULL);
args = fopen (response_file, "w");
if (args == NULL)
fatal_error ("failed to open %s", response_file);
status = writeargv (&argv[1], args);
if (status)
fatal_error ("could not write to temporary file %s", response_file);
fclose (args);
new_argv[0] = argv[0];
new_argv[1] = at_args;
new_argv[2] = NULL;
pex = collect_execute (new_argv);
do_wait (new_argv[0], pex);
free (at_args);
}
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