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/* Routines required for instrumenting a program. */
/* Compile this one with gcc. */
/* Copyright (C) 1989-2014 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.
Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.
You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
<http://www.gnu.org/licenses/>. */
/* A utility function for outputing errors. */
static int __attribute__((format(printf, 1, 2)))
gcov_error (const char *fmt, ...)
{
int ret;
va_list argp;
va_start (argp, fmt);
ret = vfprintf (stderr, fmt, argp);
va_end (argp);
return ret;
}
/* Make sure path component of the given FILENAME exists, create
missing directories. FILENAME must be writable.
Returns zero on success, or -1 if an error occurred. */
static int
create_file_directory (char *filename)
{
#if !defined(TARGET_POSIX_IO) && !defined(_WIN32)
(void) filename;
return -1;
#else
char *s;
s = filename;
if (HAS_DRIVE_SPEC(s))
s += 2;
if (IS_DIR_SEPARATOR(*s))
++s;
for (; *s != '\0'; s++)
if (IS_DIR_SEPARATOR(*s))
{
char sep = *s;
*s = '\0';
/* Try to make directory if it doesn't already exist. */
if (access (filename, F_OK) == -1
#ifdef TARGET_POSIX_IO
&& mkdir (filename, 0755) == -1
#else
&& mkdir (filename) == -1
#endif
/* The directory might have been made by another process. */
&& errno != EEXIST)
{
gcov_error ("profiling:%s:Cannot create directory\n", filename);
*s = sep;
return -1;
};
*s = sep;
};
return 0;
#endif
}
static void
allocate_filename_struct (struct gcov_filename_aux *gf)
{
const char *gcov_prefix;
int gcov_prefix_strip = 0;
size_t prefix_length;
char *gi_filename_up;
gcc_assert (gf);
{
/* Check if the level of dirs to strip off specified. */
char *tmp = getenv("GCOV_PREFIX_STRIP");
if (tmp)
{
gcov_prefix_strip = atoi (tmp);
/* Do not consider negative values. */
if (gcov_prefix_strip < 0)
gcov_prefix_strip = 0;
}
}
/* Get file name relocation prefix. Non-absolute values are ignored. */
gcov_prefix = getenv("GCOV_PREFIX");
if (gcov_prefix)
{
prefix_length = strlen(gcov_prefix);
/* Remove an unnecessary trailing '/' */
if (IS_DIR_SEPARATOR (gcov_prefix[prefix_length - 1]))
prefix_length--;
}
else
prefix_length = 0;
/* If no prefix was specified and a prefix stip, then we assume
relative. */
if (gcov_prefix_strip != 0 && prefix_length == 0)
{
gcov_prefix = ".";
prefix_length = 1;
}
/* Allocate and initialize the filename scratch space plus one. */
gi_filename = (char *) xmalloc (prefix_length + gcov_max_filename + 2);
if (prefix_length)
memcpy (gi_filename, gcov_prefix, prefix_length);
gi_filename_up = gi_filename + prefix_length;
gf->gi_filename_up = gi_filename_up;
gf->prefix_length = prefix_length;
gf->gcov_prefix_strip = gcov_prefix_strip;
}
/* Open a gcda file specified by GI_FILENAME.
Return -1 on error. Return 0 on success. */
static int
gcov_exit_open_gcda_file (struct gcov_info *gi_ptr, struct gcov_filename_aux *gf)
{
int gcov_prefix_strip;
size_t prefix_length;
char *gi_filename_up;
const char *fname, *s;
gcov_prefix_strip = gf->gcov_prefix_strip;
gi_filename_up = gf->gi_filename_up;
prefix_length = gf->prefix_length;
fname = gi_ptr->filename;
/* Avoid to add multiple drive letters into combined path. */
if (prefix_length != 0 && HAS_DRIVE_SPEC(fname))
fname += 2;
/* Build relocated filename, stripping off leading
directories from the initial filename if requested. */
if (gcov_prefix_strip > 0)
{
int level = 0;
s = fname;
if (IS_DIR_SEPARATOR(*s))
++s;
/* Skip selected directory levels. */
for (; (*s != '\0') && (level < gcov_prefix_strip); s++)
if (IS_DIR_SEPARATOR(*s))
{
fname = s;
level++;
}
}
/* Update complete filename with stripped original. */
if (prefix_length != 0 && !IS_DIR_SEPARATOR (*fname))
{
/* If prefix is given, add directory separator. */
strcpy (gi_filename_up, "/");
strcpy (gi_filename_up + 1, fname);
}
else
strcpy (gi_filename_up, fname);
if (!gcov_open (gi_filename))
{
/* Open failed likely due to missed directory.
Create directory and retry to open file. */
if (create_file_directory (gi_filename))
{
fprintf (stderr, "profiling:%s:Skip\n", gi_filename);
return -1;
}
if (!gcov_open (gi_filename))
{
fprintf (stderr, "profiling:%s:Cannot open\n", gi_filename);
return -1;
}
}
return 0;
}
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