blob: bfaf735d2ffb9f17ab846eaecbcd85c1efa34138 [file] [log] [blame]
/* Dump a gcov file, for debugging use.
Copyright (C) 2002-2021 Free Software Foundation, Inc.
Contributed by Nathan Sidwell <nathan@codesourcery.com>
Gcov 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.
Gcov 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 Gcov; see the file COPYING3. If not see
<http://www.gnu.org/licenses/>. */
#include "config.h"
#include "system.h"
#include "coretypes.h"
#include "tm.h"
#include "version.h"
#include "intl.h"
#include "diagnostic.h"
#include <getopt.h>
#define IN_GCOV (-1)
#include "gcov-io.h"
#include "gcov-io.c"
static void dump_gcov_file (const char *);
static void print_prefix (const char *, unsigned, gcov_position_t);
static void print_usage (void);
static void print_version (void);
static void tag_function (const char *, unsigned, int, unsigned);
static void tag_blocks (const char *, unsigned, int, unsigned);
static void tag_arcs (const char *, unsigned, int, unsigned);
static void tag_lines (const char *, unsigned, int, unsigned);
static void tag_counters (const char *, unsigned, int, unsigned);
static void tag_summary (const char *, unsigned, int, unsigned);
extern int main (int, char **);
typedef struct tag_format
{
unsigned tag;
char const *name;
void (*proc) (const char *, unsigned, int, unsigned);
} tag_format_t;
static int flag_dump_contents = 0;
static int flag_dump_positions = 0;
static int flag_dump_raw = 0;
static const struct option options[] =
{
{ "help", no_argument, NULL, 'h' },
{ "version", no_argument, NULL, 'v' },
{ "long", no_argument, NULL, 'l' },
{ "positions", no_argument, NULL, 'o' },
{ 0, 0, 0, 0 }
};
#define VALUE_PADDING_PREFIX " "
#define VALUE_PREFIX "%2d: "
static const tag_format_t tag_table[] =
{
{0, "NOP", NULL},
{0, "UNKNOWN", NULL},
{0, "COUNTERS", tag_counters},
{GCOV_TAG_FUNCTION, "FUNCTION", tag_function},
{GCOV_TAG_BLOCKS, "BLOCKS", tag_blocks},
{GCOV_TAG_ARCS, "ARCS", tag_arcs},
{GCOV_TAG_LINES, "LINES", tag_lines},
{GCOV_TAG_OBJECT_SUMMARY, "OBJECT_SUMMARY", tag_summary},
{0, NULL, NULL}
};
int
main (int argc ATTRIBUTE_UNUSED, char **argv)
{
int opt;
const char *p;
p = argv[0] + strlen (argv[0]);
while (p != argv[0] && !IS_DIR_SEPARATOR (p[-1]))
--p;
progname = p;
xmalloc_set_program_name (progname);
/* Unlock the stdio streams. */
unlock_std_streams ();
gcc_init_libintl ();
diagnostic_initialize (global_dc, 0);
while ((opt = getopt_long (argc, argv, "hlprvw", options, NULL)) != -1)
{
switch (opt)
{
case 'h':
print_usage ();
break;
case 'v':
print_version ();
break;
case 'l':
flag_dump_contents = 1;
break;
case 'p':
flag_dump_positions = 1;
break;
case 'r':
flag_dump_raw = 1;
break;
default:
fprintf (stderr, "unknown flag `%c'\n", opt);
}
}
while (argv[optind])
dump_gcov_file (argv[optind++]);
return 0;
}
static void
print_usage (void)
{
printf ("Usage: gcov-dump [OPTION] ... gcovfiles\n");
printf ("Print coverage file contents\n");
printf (" -h, --help Print this help\n");
printf (" -l, --long Dump record contents too\n");
printf (" -p, --positions Dump record positions\n");
printf (" -r, --raw Print content records in raw format\n");
printf (" -v, --version Print version number\n");
printf ("\nFor bug reporting instructions, please see:\n%s.\n",
bug_report_url);
}
static void
print_version (void)
{
printf ("gcov-dump %s%s\n", pkgversion_string, version_string);
printf ("Copyright (C) 2021 Free Software Foundation, Inc.\n");
printf ("This is free software; see the source for copying conditions. There is NO\n\
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n\n");
}
static void
print_prefix (const char *filename, unsigned depth, gcov_position_t position)
{
static const char prefix[] = " ";
printf ("%s:", filename);
if (flag_dump_positions)
printf ("%5lu:", (unsigned long) position);
printf ("%.*s", (int) 2 * depth, prefix);
}
static void
dump_gcov_file (const char *filename)
{
unsigned tags[4];
unsigned depth = 0;
bool is_data_type;
if (!gcov_open (filename, 1))
{
fprintf (stderr, "%s:cannot open\n", filename);
return;
}
/* magic */
{
unsigned magic = gcov_read_unsigned ();
unsigned version;
int endianness = 0;
char m[4], v[4];
if ((endianness = gcov_magic (magic, GCOV_DATA_MAGIC)))
is_data_type = true;
else if ((endianness = gcov_magic (magic, GCOV_NOTE_MAGIC)))
is_data_type = false;
else
{
printf ("%s:not a gcov file\n", filename);
gcov_close ();
return;
}
version = gcov_read_unsigned ();
GCOV_UNSIGNED2STRING (v, version);
GCOV_UNSIGNED2STRING (m, magic);
printf ("%s:%s:magic `%.4s':version `%.4s'%s\n", filename,
is_data_type ? "data" : "note",
m, v, endianness < 0 ? " (swapped endianness)" : "");
if (version != GCOV_VERSION)
{
char e[4];
GCOV_UNSIGNED2STRING (e, GCOV_VERSION);
printf ("%s:warning:current version is `%.4s'\n", filename, e);
}
}
/* stamp */
unsigned stamp = gcov_read_unsigned ();
printf ("%s:stamp %lu\n", filename, (unsigned long)stamp);
/* Checksum */
unsigned checksum = gcov_read_unsigned ();
printf ("%s:checksum %lu\n", filename, (unsigned long)checksum);
if (!is_data_type)
{
printf ("%s:cwd: %s\n", filename, gcov_read_string ());
/* Support for unexecuted basic blocks. */
unsigned support_unexecuted_blocks = gcov_read_unsigned ();
if (!support_unexecuted_blocks)
printf ("%s: has_unexecuted_block is not supported\n", filename);
}
while (1)
{
gcov_position_t base, position = gcov_position ();
int read_length;
unsigned tag, length;
tag_format_t const *format;
unsigned tag_depth;
int error;
unsigned mask;
tag = gcov_read_unsigned ();
if (!tag)
break;
read_length = (int)gcov_read_unsigned ();
length = read_length > 0 ? read_length : 0;
base = gcov_position ();
mask = GCOV_TAG_MASK (tag) >> 1;
for (tag_depth = 4; mask; mask >>= 8)
{
if ((mask & 0xff) != 0xff)
{
printf ("%s:tag `%08x' is invalid\n", filename, tag);
break;
}
tag_depth--;
}
for (format = tag_table; format->name; format++)
if (format->tag == tag)
goto found;
format = &tag_table[GCOV_TAG_IS_COUNTER (tag) ? 2 : 1];
found:;
if (tag)
{
if (depth && depth < tag_depth)
{
if (!GCOV_TAG_IS_SUBTAG (tags[depth - 1], tag))
printf ("%s:tag `%08x' is incorrectly nested\n",
filename, tag);
}
depth = tag_depth;
tags[depth - 1] = tag;
}
print_prefix (filename, tag_depth, position);
printf ("%08x:%4u:%s", tag, abs (read_length), format->name);
if (format->proc)
(*format->proc) (filename, tag, read_length, depth);
printf ("\n");
if (flag_dump_contents && format->proc)
{
unsigned long actual_length = gcov_position () - base;
if (actual_length > length)
printf ("%s:record size mismatch %lu bytes overread\n",
filename, actual_length - length);
else if (length > actual_length)
printf ("%s:record size mismatch %lu bytes unread\n",
filename, length - actual_length);
}
gcov_sync (base, length);
if ((error = gcov_is_error ()))
{
printf (error < 0 ? "%s:counter overflow at %lu\n" :
"%s:read error at %lu\n", filename,
(long unsigned) gcov_position ());
break;
}
}
gcov_close ();
}
static void
tag_function (const char *filename ATTRIBUTE_UNUSED,
unsigned tag ATTRIBUTE_UNUSED, int length,
unsigned depth ATTRIBUTE_UNUSED)
{
gcov_position_t pos = gcov_position ();
if (!length)
printf (" placeholder");
else
{
printf (" ident=%u", gcov_read_unsigned ());
printf (", lineno_checksum=0x%08x", gcov_read_unsigned ());
printf (", cfg_checksum=0x%08x", gcov_read_unsigned ());
if (gcov_position () - pos < (gcov_position_t) length)
{
const char *name;
name = gcov_read_string ();
printf (", `%s'", name ? name : "NULL");
unsigned artificial = gcov_read_unsigned ();
name = gcov_read_string ();
printf (" %s", name ? name : "NULL");
unsigned line_start = gcov_read_unsigned ();
unsigned column_start = gcov_read_unsigned ();
unsigned line_end = gcov_read_unsigned ();
unsigned column_end = gcov_read_unsigned ();
printf (":%u:%u-%u:%u", line_start, column_start,
line_end, column_end);
if (artificial)
printf (", artificial");
}
}
}
static void
tag_blocks (const char *filename ATTRIBUTE_UNUSED,
unsigned tag ATTRIBUTE_UNUSED, int length ATTRIBUTE_UNUSED,
unsigned depth ATTRIBUTE_UNUSED)
{
printf (" %u blocks", gcov_read_unsigned ());
}
static void
tag_arcs (const char *filename ATTRIBUTE_UNUSED,
unsigned tag ATTRIBUTE_UNUSED, int length ATTRIBUTE_UNUSED,
unsigned depth)
{
unsigned n_arcs = GCOV_TAG_ARCS_NUM (length);
printf (" %u arcs", n_arcs);
if (flag_dump_contents)
{
unsigned ix;
unsigned blockno = gcov_read_unsigned ();
for (ix = 0; ix != n_arcs; ix++)
{
unsigned dst, flags;
if (!(ix & 3))
{
printf ("\n");
print_prefix (filename, depth, gcov_position ());
printf (VALUE_PADDING_PREFIX "block %u:", blockno);
}
dst = gcov_read_unsigned ();
flags = gcov_read_unsigned ();
printf (" %u:%04x", dst, flags);
if (flags)
{
char c = '(';
if (flags & GCOV_ARC_ON_TREE)
printf ("%ctree", c), c = ',';
if (flags & GCOV_ARC_FAKE)
printf ("%cfake", c), c = ',';
if (flags & GCOV_ARC_FALLTHROUGH)
printf ("%cfall", c), c = ',';
printf (")");
}
}
}
}
static void
tag_lines (const char *filename ATTRIBUTE_UNUSED,
unsigned tag ATTRIBUTE_UNUSED, int length ATTRIBUTE_UNUSED,
unsigned depth)
{
if (flag_dump_contents)
{
unsigned blockno = gcov_read_unsigned ();
char const *sep = NULL;
while (1)
{
gcov_position_t position = gcov_position ();
const char *source = NULL;
unsigned lineno = gcov_read_unsigned ();
if (!lineno)
{
source = gcov_read_string ();
if (!source)
break;
sep = NULL;
}
if (!sep)
{
printf ("\n");
print_prefix (filename, depth, position);
printf (VALUE_PADDING_PREFIX "block %u:", blockno);
sep = "";
}
if (lineno)
{
printf ("%s%u", sep, lineno);
sep = ", ";
}
else
{
printf ("%s`%s'", sep, source);
sep = ":";
}
}
}
}
static void
tag_counters (const char *filename ATTRIBUTE_UNUSED,
unsigned tag ATTRIBUTE_UNUSED, int length ATTRIBUTE_UNUSED,
unsigned depth)
{
#define DEF_GCOV_COUNTER(COUNTER, NAME, MERGE_FN) NAME,
static const char *const counter_names[] = {
#include "gcov-counter.def"
};
#undef DEF_GCOV_COUNTER
int n_counts = GCOV_TAG_COUNTER_NUM (length);
bool has_zeros = n_counts < 0;
n_counts = abs (n_counts);
printf (" %s %u counts%s",
counter_names[GCOV_COUNTER_FOR_TAG (tag)], n_counts,
has_zeros ? " (all zero)" : "");
if (flag_dump_contents)
{
for (int ix = 0; ix != n_counts; ix++)
{
gcov_type count;
if (flag_dump_raw)
{
if (ix == 0)
printf (": ");
}
else if (!(ix & 7))
{
printf ("\n");
print_prefix (filename, depth, gcov_position ());
printf (VALUE_PADDING_PREFIX VALUE_PREFIX, ix);
}
count = has_zeros ? 0 : gcov_read_counter ();
printf ("%" PRId64 " ", count);
}
}
}
static void
tag_summary (const char *filename ATTRIBUTE_UNUSED,
unsigned tag ATTRIBUTE_UNUSED, int length ATTRIBUTE_UNUSED,
unsigned depth ATTRIBUTE_UNUSED)
{
gcov_summary summary;
gcov_read_summary (&summary);
printf (" runs=%d, sum_max=%" PRId64,
summary.runs, summary.sum_max);
}