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Diffstat (limited to 'gcc/gcov-dump.cc')
| -rw-r--r-- | gcc/gcov-dump.cc | 479 |
1 files changed, 479 insertions, 0 deletions
diff --git a/gcc/gcov-dump.cc b/gcc/gcov-dump.cc new file mode 100644 index 0000000..1c8c7cd --- /dev/null +++ b/gcc/gcov-dump.cc @@ -0,0 +1,479 @@ +/* Dump a gcov file, for debugging use. + Copyright (C) 2002-2022 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) 2022 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); +} |