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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 = vprintk (fmt, argp);
va_end (argp);
return ret;
}
static void
allocate_filename_struct (struct gcov_filename_aux *gf)
{
const char *gcov_prefix;
int gcov_prefix_strip = 0;
size_t prefix_length = 0;
char *gi_filename_up;
/* 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;
}
static int
gcov_open_by_filename (char *gi_filename)
{
gcov_open (gi_filename);
return 0;
}
/* Strip GCOV_PREFIX_STRIP levels of leading '/' from FILENAME and
put the result into GI_FILENAME_UP. */
static void
gcov_strip_leading_dirs (int prefix_length, int gcov_prefix_strip,
const char *filename, char *gi_filename_up)
{
strcpy (gi_filename_up, filename);
}
/* Current virual gcda file. This is for kernel use only. */
gcov_kernel_vfile *gcov_current_file;
/* Set current virutal gcda file. It needs to be set before dumping
profile data. */
void
gcov_set_vfile (gcov_kernel_vfile *file)
{
gcov_current_file = file;
}
/* File fclose operation in kernel mode. */
int
kernel_file_fclose (gcov_kernel_vfile *fp)
{
return 0;
}
/* File ftell operation in kernel mode. It currently should not
be called. */
long
kernel_file_ftell (gcov_kernel_vfile *fp)
{
return 0;
}
/* File fseek operation in kernel mode. It should only be called
with OFFSET==0 and WHENCE==0 to a freshly opened file. */
int
kernel_file_fseek (gcov_kernel_vfile *fp, long offset, int whence)
{
gcc_assert (offset == 0 && whence == 0 && fp->count == 0);
return 0;
}
/* File ftruncate operation in kernel mode. It currently should not
be called. */
int
kernel_file_ftruncate (gcov_kernel_vfile *fp, off_t value)
{
gcc_assert (0); /* should not reach here */
return 0;
}
/* File fread operation in kernel mode. It currently should not
be called. */
int
kernel_file_fread (void *ptr, size_t size, size_t nitems,
gcov_kernel_vfile *fp)
{
gcc_assert (0); /* should not reach here */
return 0;
}
/* File fwrite operation in kernel mode. It outputs the data
to a buffer in the virual file. */
int
kernel_file_fwrite (const void *ptr, size_t size,
size_t nitems, gcov_kernel_vfile *fp)
{
char *vbuf;
unsigned vsize, vpos;
unsigned len;
if (!fp) return 0;
vbuf = fp->buf;
vsize = fp->size;
vpos = fp->count;
if (vsize < vpos)
{
printk (KERN_ERR
"GCOV_KERNEL: something wrong in file %s: vbuf=%p vsize=%u"
" vpos=%u\n",
fp->info->filename, vbuf, vsize, vpos);
return 0;
}
len = vsize - vpos;
len /= size;
/* Increase the virtual file size if it is not suffcient. */
while (len < nitems)
{
vsize *= 2;
len = vsize - vpos;
len /= size;
}
if (vsize != fp->size)
{
vbuf = fp->buf = (char *) gcov_realloc_file_buf(vsize, vpos);
fp->size = vsize;
}
if (len > nitems)
len = nitems;
memcpy (vbuf+vpos, ptr, size*len);
fp->count += len*size;
if (len != nitems)
printk (KERN_ERR
"GCOV_KERNEL: something wrong in file %s: size=%lu nitems=%lu"
" len=%d vsize=%u vpos=%u \n",
fp->info->filename, size, nitems, len, vsize, vpos);
return len;
}
/* File fileno operation in kernel mode. It currently should not
be called. */
int
kernel_file_fileno (gcov_kernel_vfile *fp)
{
gcc_assert (0); /* should not reach here */
return 0;
}
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