1220 lines
35 KiB
C
1220 lines
35 KiB
C
/* Read and write coverage files, and associated functionality.
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Copyright (C) 1990-2013 Free Software Foundation, Inc.
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Contributed by James E. Wilson, UC Berkeley/Cygnus Support;
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based on some ideas from Dain Samples of UC Berkeley.
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Further mangling by Bob Manson, Cygnus Support.
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Further mangled by Nathan Sidwell, CodeSourcery
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 3, or (at your option) any later
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version.
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GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING3. If not see
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<http://www.gnu.org/licenses/>. */
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#define GCOV_LINKAGE
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#include "config.h"
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#include "system.h"
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#include "coretypes.h"
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#include "tm.h"
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#include "rtl.h"
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#include "tree.h"
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#include "flags.h"
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#include "output.h"
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#include "regs.h"
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#include "expr.h"
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#include "function.h"
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#include "basic-block.h"
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#include "toplev.h"
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#include "tm_p.h"
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#include "ggc.h"
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#include "coverage.h"
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#include "langhooks.h"
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#include "hash-table.h"
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#include "tree-iterator.h"
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#include "context.h"
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#include "pass_manager.h"
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#include "tree-pass.h"
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#include "cgraph.h"
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#include "dumpfile.h"
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#include "diagnostic-core.h"
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#include "intl.h"
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#include "filenames.h"
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#include "target.h"
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#include "gcov-io.h"
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#include "gcov-io.c"
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struct GTY((chain_next ("%h.next"))) coverage_data
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{
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struct coverage_data *next; /* next function */
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unsigned ident; /* function ident */
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unsigned lineno_checksum; /* function lineno checksum */
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unsigned cfg_checksum; /* function cfg checksum */
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tree fn_decl; /* the function decl */
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tree ctr_vars[GCOV_COUNTERS]; /* counter variables. */
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};
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/* Counts information for a function. */
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typedef struct counts_entry
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{
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/* We hash by */
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unsigned ident;
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unsigned ctr;
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/* Store */
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unsigned lineno_checksum;
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unsigned cfg_checksum;
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gcov_type *counts;
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struct gcov_ctr_summary summary;
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/* hash_table support. */
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typedef counts_entry value_type;
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typedef counts_entry compare_type;
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static inline hashval_t hash (const value_type *);
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static int equal (const value_type *, const compare_type *);
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static void remove (value_type *);
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} counts_entry_t;
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static GTY(()) struct coverage_data *functions_head = 0;
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static struct coverage_data **functions_tail = &functions_head;
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static unsigned no_coverage = 0;
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/* Cumulative counter information for whole program. */
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static unsigned prg_ctr_mask; /* Mask of counter types generated. */
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/* Counter information for current function. */
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static unsigned fn_ctr_mask; /* Mask of counters used. */
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static GTY(()) tree fn_v_ctrs[GCOV_COUNTERS]; /* counter variables. */
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static unsigned fn_n_ctrs[GCOV_COUNTERS]; /* Counters allocated. */
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static unsigned fn_b_ctrs[GCOV_COUNTERS]; /* Allocation base. */
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/* Coverage info VAR_DECL and function info type nodes. */
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static GTY(()) tree gcov_info_var;
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static GTY(()) tree gcov_fn_info_type;
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static GTY(()) tree gcov_fn_info_ptr_type;
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/* Name of the notes (gcno) output file. The "bbg" prefix is for
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historical reasons, when the notes file contained only the
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basic block graph notes.
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If this is NULL we're not writing to the notes file. */
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static char *bbg_file_name;
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/* File stamp for notes file. */
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static unsigned bbg_file_stamp;
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/* Name of the count data (gcda) file. */
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static char *da_file_name;
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/* The names of merge functions for counters. */
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static const char *const ctr_merge_functions[GCOV_COUNTERS] = GCOV_MERGE_FUNCTIONS;
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static const char *const ctr_names[GCOV_COUNTERS] = GCOV_COUNTER_NAMES;
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/* Forward declarations. */
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static void read_counts_file (void);
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static tree build_var (tree, tree, int);
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static void build_fn_info_type (tree, unsigned, tree);
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static void build_info_type (tree, tree);
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static tree build_fn_info (const struct coverage_data *, tree, tree);
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static tree build_info (tree, tree);
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static bool coverage_obj_init (void);
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static vec<constructor_elt, va_gc> *coverage_obj_fn
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(vec<constructor_elt, va_gc> *, tree, struct coverage_data const *);
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static void coverage_obj_finish (vec<constructor_elt, va_gc> *);
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/* Return the type node for gcov_type. */
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tree
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get_gcov_type (void)
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{
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enum machine_mode mode = smallest_mode_for_size (GCOV_TYPE_SIZE, MODE_INT);
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return lang_hooks.types.type_for_mode (mode, false);
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}
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/* Return the type node for gcov_unsigned_t. */
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static tree
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get_gcov_unsigned_t (void)
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{
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enum machine_mode mode = smallest_mode_for_size (32, MODE_INT);
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return lang_hooks.types.type_for_mode (mode, true);
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}
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inline hashval_t
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counts_entry::hash (const value_type *entry)
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{
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return entry->ident * GCOV_COUNTERS + entry->ctr;
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}
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inline int
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counts_entry::equal (const value_type *entry1,
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const compare_type *entry2)
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{
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return entry1->ident == entry2->ident && entry1->ctr == entry2->ctr;
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}
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inline void
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counts_entry::remove (value_type *entry)
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{
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free (entry->counts);
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free (entry);
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}
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/* Hash table of count data. */
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static hash_table <counts_entry> counts_hash;
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/* Read in the counts file, if available. */
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static void
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read_counts_file (void)
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{
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gcov_unsigned_t fn_ident = 0;
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struct gcov_summary summary;
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unsigned new_summary = 1;
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gcov_unsigned_t tag;
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int is_error = 0;
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unsigned lineno_checksum = 0;
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unsigned cfg_checksum = 0;
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if (!gcov_open (da_file_name, 1))
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return;
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if (!gcov_magic (gcov_read_unsigned (), GCOV_DATA_MAGIC))
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{
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warning (0, "%qs is not a gcov data file", da_file_name);
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gcov_close ();
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return;
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}
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else if ((tag = gcov_read_unsigned ()) != GCOV_VERSION)
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{
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char v[4], e[4];
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GCOV_UNSIGNED2STRING (v, tag);
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GCOV_UNSIGNED2STRING (e, GCOV_VERSION);
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warning (0, "%qs is version %q.*s, expected version %q.*s",
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da_file_name, 4, v, 4, e);
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gcov_close ();
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return;
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}
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/* Read the stamp, used for creating a generation count. */
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tag = gcov_read_unsigned ();
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bbg_file_stamp = crc32_unsigned (bbg_file_stamp, tag);
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counts_hash.create (10);
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while ((tag = gcov_read_unsigned ()))
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{
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gcov_unsigned_t length;
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gcov_position_t offset;
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length = gcov_read_unsigned ();
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offset = gcov_position ();
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if (tag == GCOV_TAG_FUNCTION)
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{
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if (length)
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{
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fn_ident = gcov_read_unsigned ();
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lineno_checksum = gcov_read_unsigned ();
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cfg_checksum = gcov_read_unsigned ();
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}
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else
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fn_ident = lineno_checksum = cfg_checksum = 0;
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new_summary = 1;
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}
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else if (tag == GCOV_TAG_PROGRAM_SUMMARY)
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{
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struct gcov_summary sum;
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unsigned ix;
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if (new_summary)
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memset (&summary, 0, sizeof (summary));
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gcov_read_summary (&sum);
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for (ix = 0; ix != GCOV_COUNTERS_SUMMABLE; ix++)
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{
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summary.ctrs[ix].runs += sum.ctrs[ix].runs;
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summary.ctrs[ix].sum_all += sum.ctrs[ix].sum_all;
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if (summary.ctrs[ix].run_max < sum.ctrs[ix].run_max)
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summary.ctrs[ix].run_max = sum.ctrs[ix].run_max;
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summary.ctrs[ix].sum_max += sum.ctrs[ix].sum_max;
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}
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if (new_summary)
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memcpy (summary.ctrs[GCOV_COUNTER_ARCS].histogram,
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sum.ctrs[GCOV_COUNTER_ARCS].histogram,
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sizeof (gcov_bucket_type) * GCOV_HISTOGRAM_SIZE);
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else
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gcov_histogram_merge (summary.ctrs[GCOV_COUNTER_ARCS].histogram,
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sum.ctrs[GCOV_COUNTER_ARCS].histogram);
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new_summary = 0;
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}
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else if (GCOV_TAG_IS_COUNTER (tag) && fn_ident)
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{
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counts_entry_t **slot, *entry, elt;
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unsigned n_counts = GCOV_TAG_COUNTER_NUM (length);
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unsigned ix;
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elt.ident = fn_ident;
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elt.ctr = GCOV_COUNTER_FOR_TAG (tag);
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slot = counts_hash.find_slot (&elt, INSERT);
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entry = *slot;
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if (!entry)
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{
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*slot = entry = XCNEW (counts_entry_t);
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entry->ident = fn_ident;
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entry->ctr = elt.ctr;
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entry->lineno_checksum = lineno_checksum;
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entry->cfg_checksum = cfg_checksum;
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if (elt.ctr < GCOV_COUNTERS_SUMMABLE)
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entry->summary = summary.ctrs[elt.ctr];
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entry->summary.num = n_counts;
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entry->counts = XCNEWVEC (gcov_type, n_counts);
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}
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else if (entry->lineno_checksum != lineno_checksum
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|| entry->cfg_checksum != cfg_checksum)
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{
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error ("Profile data for function %u is corrupted", fn_ident);
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error ("checksum is (%x,%x) instead of (%x,%x)",
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entry->lineno_checksum, entry->cfg_checksum,
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lineno_checksum, cfg_checksum);
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counts_hash.dispose ();
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break;
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}
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else if (entry->summary.num != n_counts)
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{
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error ("Profile data for function %u is corrupted", fn_ident);
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error ("number of counters is %d instead of %d", entry->summary.num, n_counts);
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counts_hash.dispose ();
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break;
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}
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else if (elt.ctr >= GCOV_COUNTERS_SUMMABLE)
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{
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error ("cannot merge separate %s counters for function %u",
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ctr_names[elt.ctr], fn_ident);
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goto skip_merge;
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}
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else
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{
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entry->summary.runs += summary.ctrs[elt.ctr].runs;
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entry->summary.sum_all += summary.ctrs[elt.ctr].sum_all;
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if (entry->summary.run_max < summary.ctrs[elt.ctr].run_max)
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entry->summary.run_max = summary.ctrs[elt.ctr].run_max;
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entry->summary.sum_max += summary.ctrs[elt.ctr].sum_max;
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}
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for (ix = 0; ix != n_counts; ix++)
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entry->counts[ix] += gcov_read_counter ();
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skip_merge:;
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}
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gcov_sync (offset, length);
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if ((is_error = gcov_is_error ()))
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{
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error (is_error < 0 ? "%qs has overflowed" : "%qs is corrupted",
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da_file_name);
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counts_hash.dispose ();
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break;
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||
}
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||
}
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||
|
||
gcov_close ();
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||
}
|
||
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/* Returns the counters for a particular tag. */
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||
|
||
gcov_type *
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get_coverage_counts (unsigned counter, unsigned expected,
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unsigned cfg_checksum, unsigned lineno_checksum,
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||
const struct gcov_ctr_summary **summary)
|
||
{
|
||
counts_entry_t *entry, elt;
|
||
|
||
/* No hash table, no counts. */
|
||
if (!counts_hash.is_created ())
|
||
{
|
||
static int warned = 0;
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||
|
||
if (!warned++ && dump_enabled_p ())
|
||
dump_printf_loc (MSG_OPTIMIZED_LOCATIONS, input_location,
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(flag_guess_branch_prob
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? "file %s not found, execution counts estimated\n"
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||
: "file %s not found, execution counts assumed to "
|
||
"be zero\n"),
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||
da_file_name);
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||
return NULL;
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||
}
|
||
|
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elt.ident = current_function_funcdef_no + 1;
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||
elt.ctr = counter;
|
||
entry = counts_hash.find (&elt);
|
||
if (!entry || !entry->summary.num)
|
||
/* The function was not emitted, or is weak and not chosen in the
|
||
final executable. Silently fail, because there's nothing we
|
||
can do about it. */
|
||
return NULL;
|
||
|
||
if (entry->cfg_checksum != cfg_checksum
|
||
|| entry->summary.num != expected)
|
||
{
|
||
static int warned = 0;
|
||
bool warning_printed = false;
|
||
tree id = DECL_ASSEMBLER_NAME (current_function_decl);
|
||
|
||
warning_printed =
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warning_at (input_location, OPT_Wcoverage_mismatch,
|
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"the control flow of function %qE does not match "
|
||
"its profile data (counter %qs)", id, ctr_names[counter]);
|
||
if (warning_printed && dump_enabled_p ())
|
||
{
|
||
dump_printf_loc (MSG_OPTIMIZED_LOCATIONS, input_location,
|
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"use -Wno-error=coverage-mismatch to tolerate "
|
||
"the mismatch but performance may drop if the "
|
||
"function is hot\n");
|
||
|
||
if (!seen_error ()
|
||
&& !warned++)
|
||
{
|
||
dump_printf_loc (MSG_OPTIMIZED_LOCATIONS, input_location,
|
||
"coverage mismatch ignored\n");
|
||
dump_printf (MSG_OPTIMIZED_LOCATIONS,
|
||
flag_guess_branch_prob
|
||
? G_("execution counts estimated\n")
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||
: G_("execution counts assumed to be zero\n"));
|
||
if (!flag_guess_branch_prob)
|
||
dump_printf (MSG_OPTIMIZED_LOCATIONS,
|
||
"this can result in poorly optimized code\n");
|
||
}
|
||
}
|
||
|
||
return NULL;
|
||
}
|
||
else if (entry->lineno_checksum != lineno_checksum)
|
||
{
|
||
warning (0, "source locations for function %qE have changed,"
|
||
" the profile data may be out of date",
|
||
DECL_ASSEMBLER_NAME (current_function_decl));
|
||
}
|
||
|
||
if (summary)
|
||
*summary = &entry->summary;
|
||
|
||
return entry->counts;
|
||
}
|
||
|
||
/* Allocate NUM counters of type COUNTER. Returns nonzero if the
|
||
allocation succeeded. */
|
||
|
||
int
|
||
coverage_counter_alloc (unsigned counter, unsigned num)
|
||
{
|
||
if (no_coverage)
|
||
return 0;
|
||
|
||
if (!num)
|
||
return 1;
|
||
|
||
if (!fn_v_ctrs[counter])
|
||
{
|
||
tree array_type = build_array_type (get_gcov_type (), NULL_TREE);
|
||
|
||
fn_v_ctrs[counter]
|
||
= build_var (current_function_decl, array_type, counter);
|
||
}
|
||
|
||
fn_b_ctrs[counter] = fn_n_ctrs[counter];
|
||
fn_n_ctrs[counter] += num;
|
||
|
||
fn_ctr_mask |= 1 << counter;
|
||
return 1;
|
||
}
|
||
|
||
/* Generate a tree to access COUNTER NO. */
|
||
|
||
tree
|
||
tree_coverage_counter_ref (unsigned counter, unsigned no)
|
||
{
|
||
tree gcov_type_node = get_gcov_type ();
|
||
|
||
gcc_assert (no < fn_n_ctrs[counter] - fn_b_ctrs[counter]);
|
||
|
||
no += fn_b_ctrs[counter];
|
||
|
||
/* "no" here is an array index, scaled to bytes later. */
|
||
return build4 (ARRAY_REF, gcov_type_node, fn_v_ctrs[counter],
|
||
build_int_cst (integer_type_node, no), NULL, NULL);
|
||
}
|
||
|
||
/* Generate a tree to access the address of COUNTER NO. */
|
||
|
||
tree
|
||
tree_coverage_counter_addr (unsigned counter, unsigned no)
|
||
{
|
||
tree gcov_type_node = get_gcov_type ();
|
||
|
||
gcc_assert (no < fn_n_ctrs[counter] - fn_b_ctrs[counter]);
|
||
no += fn_b_ctrs[counter];
|
||
|
||
/* "no" here is an array index, scaled to bytes later. */
|
||
return build_fold_addr_expr (build4 (ARRAY_REF, gcov_type_node,
|
||
fn_v_ctrs[counter],
|
||
build_int_cst (integer_type_node, no),
|
||
NULL, NULL));
|
||
}
|
||
|
||
|
||
/* Generate a checksum for a string. CHKSUM is the current
|
||
checksum. */
|
||
|
||
static unsigned
|
||
coverage_checksum_string (unsigned chksum, const char *string)
|
||
{
|
||
int i;
|
||
char *dup = NULL;
|
||
|
||
/* Look for everything that looks if it were produced by
|
||
get_file_function_name and zero out the second part
|
||
that may result from flag_random_seed. This is not critical
|
||
as the checksums are used only for sanity checking. */
|
||
for (i = 0; string[i]; i++)
|
||
{
|
||
int offset = 0;
|
||
if (!strncmp (string + i, "_GLOBAL__N_", 11))
|
||
offset = 11;
|
||
if (!strncmp (string + i, "_GLOBAL__", 9))
|
||
offset = 9;
|
||
|
||
/* C++ namespaces do have scheme:
|
||
_GLOBAL__N_<filename>_<wrongmagicnumber>_<magicnumber>functionname
|
||
since filename might contain extra underscores there seems
|
||
to be no better chance then walk all possible offsets looking
|
||
for magicnumber. */
|
||
if (offset)
|
||
{
|
||
for (i = i + offset; string[i]; i++)
|
||
if (string[i]=='_')
|
||
{
|
||
int y;
|
||
|
||
for (y = 1; y < 9; y++)
|
||
if (!(string[i + y] >= '0' && string[i + y] <= '9')
|
||
&& !(string[i + y] >= 'A' && string[i + y] <= 'F'))
|
||
break;
|
||
if (y != 9 || string[i + 9] != '_')
|
||
continue;
|
||
for (y = 10; y < 18; y++)
|
||
if (!(string[i + y] >= '0' && string[i + y] <= '9')
|
||
&& !(string[i + y] >= 'A' && string[i + y] <= 'F'))
|
||
break;
|
||
if (y != 18)
|
||
continue;
|
||
if (!dup)
|
||
string = dup = xstrdup (string);
|
||
for (y = 10; y < 18; y++)
|
||
dup[i + y] = '0';
|
||
}
|
||
break;
|
||
}
|
||
}
|
||
|
||
chksum = crc32_string (chksum, string);
|
||
free (dup);
|
||
|
||
return chksum;
|
||
}
|
||
|
||
/* Compute checksum for the current function. We generate a CRC32. */
|
||
|
||
unsigned
|
||
coverage_compute_lineno_checksum (void)
|
||
{
|
||
expanded_location xloc
|
||
= expand_location (DECL_SOURCE_LOCATION (current_function_decl));
|
||
unsigned chksum = xloc.line;
|
||
|
||
chksum = coverage_checksum_string (chksum, xloc.file);
|
||
chksum = coverage_checksum_string
|
||
(chksum, IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (current_function_decl)));
|
||
|
||
return chksum;
|
||
}
|
||
|
||
/* Compute profile ID. This is better to be unique in whole program. */
|
||
|
||
unsigned
|
||
coverage_compute_profile_id (struct cgraph_node *n)
|
||
{
|
||
expanded_location xloc
|
||
= expand_location (DECL_SOURCE_LOCATION (n->decl));
|
||
unsigned chksum = xloc.line;
|
||
|
||
chksum = coverage_checksum_string (chksum, xloc.file);
|
||
chksum = coverage_checksum_string
|
||
(chksum, IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (n->decl)));
|
||
if (first_global_object_name)
|
||
chksum = coverage_checksum_string
|
||
(chksum, first_global_object_name);
|
||
chksum = coverage_checksum_string
|
||
(chksum, aux_base_name);
|
||
|
||
/* Non-negative integers are hopefully small enough to fit in all targets. */
|
||
return chksum & 0x7fffffff;
|
||
}
|
||
|
||
/* Compute cfg checksum for the current function.
|
||
The checksum is calculated carefully so that
|
||
source code changes that doesn't affect the control flow graph
|
||
won't change the checksum.
|
||
This is to make the profile data useable across source code change.
|
||
The downside of this is that the compiler may use potentially
|
||
wrong profile data - that the source code change has non-trivial impact
|
||
on the validity of profile data (e.g. the reversed condition)
|
||
but the compiler won't detect the change and use the wrong profile data. */
|
||
|
||
unsigned
|
||
coverage_compute_cfg_checksum (void)
|
||
{
|
||
basic_block bb;
|
||
unsigned chksum = n_basic_blocks;
|
||
|
||
FOR_EACH_BB (bb)
|
||
{
|
||
edge e;
|
||
edge_iterator ei;
|
||
chksum = crc32_byte (chksum, bb->index);
|
||
FOR_EACH_EDGE (e, ei, bb->succs)
|
||
{
|
||
chksum = crc32_byte (chksum, e->dest->index);
|
||
}
|
||
}
|
||
|
||
return chksum;
|
||
}
|
||
|
||
/* Begin output to the notes file for the current function.
|
||
Writes the function header. Returns nonzero if data should be output. */
|
||
|
||
int
|
||
coverage_begin_function (unsigned lineno_checksum, unsigned cfg_checksum)
|
||
{
|
||
expanded_location xloc;
|
||
unsigned long offset;
|
||
|
||
/* We don't need to output .gcno file unless we're under -ftest-coverage
|
||
(e.g. -fprofile-arcs/generate/use don't need .gcno to work). */
|
||
if (no_coverage || !bbg_file_name)
|
||
return 0;
|
||
|
||
xloc = expand_location (DECL_SOURCE_LOCATION (current_function_decl));
|
||
|
||
/* Announce function */
|
||
offset = gcov_write_tag (GCOV_TAG_FUNCTION);
|
||
gcov_write_unsigned (current_function_funcdef_no + 1);
|
||
gcov_write_unsigned (lineno_checksum);
|
||
gcov_write_unsigned (cfg_checksum);
|
||
gcov_write_string (IDENTIFIER_POINTER
|
||
(DECL_ASSEMBLER_NAME (current_function_decl)));
|
||
gcov_write_string (xloc.file);
|
||
gcov_write_unsigned (xloc.line);
|
||
gcov_write_length (offset);
|
||
|
||
return !gcov_is_error ();
|
||
}
|
||
|
||
/* Finish coverage data for the current function. Verify no output
|
||
error has occurred. Save function coverage counts. */
|
||
|
||
void
|
||
coverage_end_function (unsigned lineno_checksum, unsigned cfg_checksum)
|
||
{
|
||
unsigned i;
|
||
|
||
if (bbg_file_name && gcov_is_error ())
|
||
{
|
||
warning (0, "error writing %qs", bbg_file_name);
|
||
unlink (bbg_file_name);
|
||
bbg_file_name = NULL;
|
||
}
|
||
|
||
if (fn_ctr_mask)
|
||
{
|
||
struct coverage_data *item = 0;
|
||
|
||
/* If the function is extern (i.e. extern inline), then we won't
|
||
be outputting it, so don't chain it onto the function
|
||
list. */
|
||
if (!DECL_EXTERNAL (current_function_decl))
|
||
{
|
||
item = ggc_alloc_coverage_data ();
|
||
|
||
item->ident = current_function_funcdef_no + 1;
|
||
item->lineno_checksum = lineno_checksum;
|
||
item->cfg_checksum = cfg_checksum;
|
||
|
||
item->fn_decl = current_function_decl;
|
||
item->next = 0;
|
||
*functions_tail = item;
|
||
functions_tail = &item->next;
|
||
}
|
||
|
||
for (i = 0; i != GCOV_COUNTERS; i++)
|
||
{
|
||
tree var = fn_v_ctrs[i];
|
||
|
||
if (item)
|
||
item->ctr_vars[i] = var;
|
||
if (var)
|
||
{
|
||
tree array_type = build_index_type (size_int (fn_n_ctrs[i] - 1));
|
||
array_type = build_array_type (get_gcov_type (), array_type);
|
||
TREE_TYPE (var) = array_type;
|
||
DECL_SIZE (var) = TYPE_SIZE (array_type);
|
||
DECL_SIZE_UNIT (var) = TYPE_SIZE_UNIT (array_type);
|
||
varpool_finalize_decl (var);
|
||
}
|
||
|
||
fn_b_ctrs[i] = fn_n_ctrs[i] = 0;
|
||
fn_v_ctrs[i] = NULL_TREE;
|
||
}
|
||
prg_ctr_mask |= fn_ctr_mask;
|
||
fn_ctr_mask = 0;
|
||
}
|
||
}
|
||
|
||
/* Build a coverage variable of TYPE for function FN_DECL. If COUNTER
|
||
>= 0 it is a counter array, otherwise it is the function structure. */
|
||
|
||
static tree
|
||
build_var (tree fn_decl, tree type, int counter)
|
||
{
|
||
tree var = build_decl (BUILTINS_LOCATION, VAR_DECL, NULL_TREE, type);
|
||
const char *fn_name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (fn_decl));
|
||
char *buf;
|
||
size_t fn_name_len, len;
|
||
|
||
fn_name = targetm.strip_name_encoding (fn_name);
|
||
fn_name_len = strlen (fn_name);
|
||
buf = XALLOCAVEC (char, fn_name_len + 8 + sizeof (int) * 3);
|
||
|
||
if (counter < 0)
|
||
strcpy (buf, "__gcov__");
|
||
else
|
||
sprintf (buf, "__gcov%u_", counter);
|
||
len = strlen (buf);
|
||
#ifndef NO_DOT_IN_LABEL
|
||
buf[len - 1] = '.';
|
||
#elif !defined NO_DOLLAR_IN_LABEL
|
||
buf[len - 1] = '$';
|
||
#endif
|
||
memcpy (buf + len, fn_name, fn_name_len + 1);
|
||
DECL_NAME (var) = get_identifier (buf);
|
||
TREE_STATIC (var) = 1;
|
||
TREE_ADDRESSABLE (var) = 1;
|
||
DECL_ALIGN (var) = TYPE_ALIGN (type);
|
||
|
||
return var;
|
||
}
|
||
|
||
/* Creates the gcov_fn_info RECORD_TYPE. */
|
||
|
||
static void
|
||
build_fn_info_type (tree type, unsigned counters, tree gcov_info_type)
|
||
{
|
||
tree ctr_info = lang_hooks.types.make_type (RECORD_TYPE);
|
||
tree field, fields;
|
||
tree array_type;
|
||
|
||
gcc_assert (counters);
|
||
|
||
/* ctr_info::num */
|
||
field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE,
|
||
get_gcov_unsigned_t ());
|
||
fields = field;
|
||
|
||
/* ctr_info::values */
|
||
field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE,
|
||
build_pointer_type (get_gcov_type ()));
|
||
DECL_CHAIN (field) = fields;
|
||
fields = field;
|
||
|
||
finish_builtin_struct (ctr_info, "__gcov_ctr_info", fields, NULL_TREE);
|
||
|
||
/* key */
|
||
field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE,
|
||
build_pointer_type (build_qualified_type
|
||
(gcov_info_type, TYPE_QUAL_CONST)));
|
||
fields = field;
|
||
|
||
/* ident */
|
||
field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE,
|
||
get_gcov_unsigned_t ());
|
||
DECL_CHAIN (field) = fields;
|
||
fields = field;
|
||
|
||
/* lineno_checksum */
|
||
field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE,
|
||
get_gcov_unsigned_t ());
|
||
DECL_CHAIN (field) = fields;
|
||
fields = field;
|
||
|
||
/* cfg checksum */
|
||
field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE,
|
||
get_gcov_unsigned_t ());
|
||
DECL_CHAIN (field) = fields;
|
||
fields = field;
|
||
|
||
array_type = build_index_type (size_int (counters - 1));
|
||
array_type = build_array_type (ctr_info, array_type);
|
||
|
||
/* counters */
|
||
field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, array_type);
|
||
DECL_CHAIN (field) = fields;
|
||
fields = field;
|
||
|
||
finish_builtin_struct (type, "__gcov_fn_info", fields, NULL_TREE);
|
||
}
|
||
|
||
/* Returns a CONSTRUCTOR for a gcov_fn_info. DATA is
|
||
the coverage data for the function and TYPE is the gcov_fn_info
|
||
RECORD_TYPE. KEY is the object file key. */
|
||
|
||
static tree
|
||
build_fn_info (const struct coverage_data *data, tree type, tree key)
|
||
{
|
||
tree fields = TYPE_FIELDS (type);
|
||
tree ctr_type;
|
||
unsigned ix;
|
||
vec<constructor_elt, va_gc> *v1 = NULL;
|
||
vec<constructor_elt, va_gc> *v2 = NULL;
|
||
|
||
/* key */
|
||
CONSTRUCTOR_APPEND_ELT (v1, fields,
|
||
build1 (ADDR_EXPR, TREE_TYPE (fields), key));
|
||
fields = DECL_CHAIN (fields);
|
||
|
||
/* ident */
|
||
CONSTRUCTOR_APPEND_ELT (v1, fields,
|
||
build_int_cstu (get_gcov_unsigned_t (),
|
||
data->ident));
|
||
fields = DECL_CHAIN (fields);
|
||
|
||
/* lineno_checksum */
|
||
CONSTRUCTOR_APPEND_ELT (v1, fields,
|
||
build_int_cstu (get_gcov_unsigned_t (),
|
||
data->lineno_checksum));
|
||
fields = DECL_CHAIN (fields);
|
||
|
||
/* cfg_checksum */
|
||
CONSTRUCTOR_APPEND_ELT (v1, fields,
|
||
build_int_cstu (get_gcov_unsigned_t (),
|
||
data->cfg_checksum));
|
||
fields = DECL_CHAIN (fields);
|
||
|
||
/* counters */
|
||
ctr_type = TREE_TYPE (TREE_TYPE (fields));
|
||
for (ix = 0; ix != GCOV_COUNTERS; ix++)
|
||
if (prg_ctr_mask & (1 << ix))
|
||
{
|
||
vec<constructor_elt, va_gc> *ctr = NULL;
|
||
tree var = data->ctr_vars[ix];
|
||
unsigned count = 0;
|
||
|
||
if (var)
|
||
count
|
||
= tree_low_cst (TYPE_MAX_VALUE (TYPE_DOMAIN (TREE_TYPE (var))), 0)
|
||
+ 1;
|
||
|
||
CONSTRUCTOR_APPEND_ELT (ctr, TYPE_FIELDS (ctr_type),
|
||
build_int_cstu (get_gcov_unsigned_t (),
|
||
count));
|
||
|
||
if (var)
|
||
CONSTRUCTOR_APPEND_ELT (ctr, DECL_CHAIN (TYPE_FIELDS (ctr_type)),
|
||
build_fold_addr_expr (var));
|
||
|
||
CONSTRUCTOR_APPEND_ELT (v2, NULL, build_constructor (ctr_type, ctr));
|
||
}
|
||
|
||
CONSTRUCTOR_APPEND_ELT (v1, fields,
|
||
build_constructor (TREE_TYPE (fields), v2));
|
||
|
||
return build_constructor (type, v1);
|
||
}
|
||
|
||
/* Create gcov_info struct. TYPE is the incomplete RECORD_TYPE to be
|
||
completed, and FN_INFO_PTR_TYPE is a pointer to the function info type. */
|
||
|
||
static void
|
||
build_info_type (tree type, tree fn_info_ptr_type)
|
||
{
|
||
tree field, fields = NULL_TREE;
|
||
tree merge_fn_type;
|
||
|
||
/* Version ident */
|
||
field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE,
|
||
get_gcov_unsigned_t ());
|
||
DECL_CHAIN (field) = fields;
|
||
fields = field;
|
||
|
||
/* next pointer */
|
||
field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE,
|
||
build_pointer_type (build_qualified_type
|
||
(type, TYPE_QUAL_CONST)));
|
||
DECL_CHAIN (field) = fields;
|
||
fields = field;
|
||
|
||
/* stamp */
|
||
field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE,
|
||
get_gcov_unsigned_t ());
|
||
DECL_CHAIN (field) = fields;
|
||
fields = field;
|
||
|
||
/* Filename */
|
||
field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE,
|
||
build_pointer_type (build_qualified_type
|
||
(char_type_node, TYPE_QUAL_CONST)));
|
||
DECL_CHAIN (field) = fields;
|
||
fields = field;
|
||
|
||
/* merge fn array */
|
||
merge_fn_type
|
||
= build_function_type_list (void_type_node,
|
||
build_pointer_type (get_gcov_type ()),
|
||
get_gcov_unsigned_t (), NULL_TREE);
|
||
merge_fn_type
|
||
= build_array_type (build_pointer_type (merge_fn_type),
|
||
build_index_type (size_int (GCOV_COUNTERS - 1)));
|
||
field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE,
|
||
merge_fn_type);
|
||
DECL_CHAIN (field) = fields;
|
||
fields = field;
|
||
|
||
/* n_functions */
|
||
field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE,
|
||
get_gcov_unsigned_t ());
|
||
DECL_CHAIN (field) = fields;
|
||
fields = field;
|
||
|
||
/* function_info pointer pointer */
|
||
fn_info_ptr_type = build_pointer_type
|
||
(build_qualified_type (fn_info_ptr_type, TYPE_QUAL_CONST));
|
||
field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE,
|
||
fn_info_ptr_type);
|
||
DECL_CHAIN (field) = fields;
|
||
fields = field;
|
||
|
||
finish_builtin_struct (type, "__gcov_info", fields, NULL_TREE);
|
||
}
|
||
|
||
/* Returns a CONSTRUCTOR for the gcov_info object. INFO_TYPE is the
|
||
gcov_info structure type, FN_ARY is the array of pointers to
|
||
function info objects. */
|
||
|
||
static tree
|
||
build_info (tree info_type, tree fn_ary)
|
||
{
|
||
tree info_fields = TYPE_FIELDS (info_type);
|
||
tree merge_fn_type, n_funcs;
|
||
unsigned ix;
|
||
tree filename_string;
|
||
int da_file_name_len;
|
||
vec<constructor_elt, va_gc> *v1 = NULL;
|
||
vec<constructor_elt, va_gc> *v2 = NULL;
|
||
|
||
/* Version ident */
|
||
CONSTRUCTOR_APPEND_ELT (v1, info_fields,
|
||
build_int_cstu (TREE_TYPE (info_fields),
|
||
GCOV_VERSION));
|
||
info_fields = DECL_CHAIN (info_fields);
|
||
|
||
/* next -- NULL */
|
||
CONSTRUCTOR_APPEND_ELT (v1, info_fields, null_pointer_node);
|
||
info_fields = DECL_CHAIN (info_fields);
|
||
|
||
/* stamp */
|
||
CONSTRUCTOR_APPEND_ELT (v1, info_fields,
|
||
build_int_cstu (TREE_TYPE (info_fields),
|
||
bbg_file_stamp));
|
||
info_fields = DECL_CHAIN (info_fields);
|
||
|
||
/* Filename */
|
||
da_file_name_len = strlen (da_file_name);
|
||
filename_string = build_string (da_file_name_len + 1, da_file_name);
|
||
TREE_TYPE (filename_string) = build_array_type
|
||
(char_type_node, build_index_type (size_int (da_file_name_len)));
|
||
CONSTRUCTOR_APPEND_ELT (v1, info_fields,
|
||
build1 (ADDR_EXPR, TREE_TYPE (info_fields),
|
||
filename_string));
|
||
info_fields = DECL_CHAIN (info_fields);
|
||
|
||
/* merge fn array -- NULL slots indicate unmeasured counters */
|
||
merge_fn_type = TREE_TYPE (TREE_TYPE (info_fields));
|
||
for (ix = 0; ix != GCOV_COUNTERS; ix++)
|
||
{
|
||
tree ptr = null_pointer_node;
|
||
|
||
if ((1u << ix) & prg_ctr_mask)
|
||
{
|
||
tree merge_fn = build_decl (BUILTINS_LOCATION,
|
||
FUNCTION_DECL,
|
||
get_identifier (ctr_merge_functions[ix]),
|
||
TREE_TYPE (merge_fn_type));
|
||
DECL_EXTERNAL (merge_fn) = 1;
|
||
TREE_PUBLIC (merge_fn) = 1;
|
||
DECL_ARTIFICIAL (merge_fn) = 1;
|
||
TREE_NOTHROW (merge_fn) = 1;
|
||
/* Initialize assembler name so we can stream out. */
|
||
DECL_ASSEMBLER_NAME (merge_fn);
|
||
ptr = build1 (ADDR_EXPR, merge_fn_type, merge_fn);
|
||
}
|
||
CONSTRUCTOR_APPEND_ELT (v2, NULL, ptr);
|
||
}
|
||
CONSTRUCTOR_APPEND_ELT (v1, info_fields,
|
||
build_constructor (TREE_TYPE (info_fields), v2));
|
||
info_fields = DECL_CHAIN (info_fields);
|
||
|
||
/* n_functions */
|
||
n_funcs = TYPE_MAX_VALUE (TYPE_DOMAIN (TREE_TYPE (fn_ary)));
|
||
n_funcs = fold_build2 (PLUS_EXPR, TREE_TYPE (info_fields),
|
||
n_funcs, size_one_node);
|
||
CONSTRUCTOR_APPEND_ELT (v1, info_fields, n_funcs);
|
||
info_fields = DECL_CHAIN (info_fields);
|
||
|
||
/* functions */
|
||
CONSTRUCTOR_APPEND_ELT (v1, info_fields,
|
||
build1 (ADDR_EXPR, TREE_TYPE (info_fields), fn_ary));
|
||
info_fields = DECL_CHAIN (info_fields);
|
||
|
||
gcc_assert (!info_fields);
|
||
return build_constructor (info_type, v1);
|
||
}
|
||
|
||
/* Generate the constructor function to call __gcov_init. */
|
||
|
||
static void
|
||
build_init_ctor (tree gcov_info_type)
|
||
{
|
||
tree ctor, stmt, init_fn;
|
||
|
||
/* Build a decl for __gcov_init. */
|
||
init_fn = build_pointer_type (gcov_info_type);
|
||
init_fn = build_function_type_list (void_type_node, init_fn, NULL);
|
||
init_fn = build_decl (BUILTINS_LOCATION, FUNCTION_DECL,
|
||
get_identifier ("__gcov_init"), init_fn);
|
||
TREE_PUBLIC (init_fn) = 1;
|
||
DECL_EXTERNAL (init_fn) = 1;
|
||
DECL_ASSEMBLER_NAME (init_fn);
|
||
|
||
/* Generate a call to __gcov_init(&gcov_info). */
|
||
ctor = NULL;
|
||
stmt = build_fold_addr_expr (gcov_info_var);
|
||
stmt = build_call_expr (init_fn, 1, stmt);
|
||
append_to_statement_list (stmt, &ctor);
|
||
|
||
/* Generate a constructor to run it. */
|
||
cgraph_build_static_cdtor ('I', ctor, DEFAULT_INIT_PRIORITY);
|
||
}
|
||
|
||
/* Create the gcov_info types and object. Generate the constructor
|
||
function to call __gcov_init. Does not generate the initializer
|
||
for the object. Returns TRUE if coverage data is being emitted. */
|
||
|
||
static bool
|
||
coverage_obj_init (void)
|
||
{
|
||
tree gcov_info_type;
|
||
unsigned n_counters = 0;
|
||
unsigned ix;
|
||
struct coverage_data *fn;
|
||
struct coverage_data **fn_prev;
|
||
char name_buf[32];
|
||
|
||
no_coverage = 1; /* Disable any further coverage. */
|
||
|
||
if (!prg_ctr_mask)
|
||
return false;
|
||
|
||
if (cgraph_dump_file)
|
||
fprintf (cgraph_dump_file, "Using data file %s\n", da_file_name);
|
||
|
||
/* Prune functions. */
|
||
for (fn_prev = &functions_head; (fn = *fn_prev);)
|
||
if (DECL_STRUCT_FUNCTION (fn->fn_decl))
|
||
fn_prev = &fn->next;
|
||
else
|
||
/* The function is not being emitted, remove from list. */
|
||
*fn_prev = fn->next;
|
||
|
||
if (functions_head == NULL)
|
||
return false;
|
||
|
||
for (ix = 0; ix != GCOV_COUNTERS; ix++)
|
||
if ((1u << ix) & prg_ctr_mask)
|
||
n_counters++;
|
||
|
||
/* Build the info and fn_info types. These are mutually recursive. */
|
||
gcov_info_type = lang_hooks.types.make_type (RECORD_TYPE);
|
||
gcov_fn_info_type = lang_hooks.types.make_type (RECORD_TYPE);
|
||
gcov_fn_info_ptr_type = build_pointer_type
|
||
(build_qualified_type (gcov_fn_info_type, TYPE_QUAL_CONST));
|
||
build_fn_info_type (gcov_fn_info_type, n_counters, gcov_info_type);
|
||
build_info_type (gcov_info_type, gcov_fn_info_ptr_type);
|
||
|
||
/* Build the gcov info var, this is referred to in its own
|
||
initializer. */
|
||
gcov_info_var = build_decl (BUILTINS_LOCATION,
|
||
VAR_DECL, NULL_TREE, gcov_info_type);
|
||
TREE_STATIC (gcov_info_var) = 1;
|
||
ASM_GENERATE_INTERNAL_LABEL (name_buf, "LPBX", 0);
|
||
DECL_NAME (gcov_info_var) = get_identifier (name_buf);
|
||
|
||
build_init_ctor (gcov_info_type);
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Generate the coverage function info for FN and DATA. Append a
|
||
pointer to that object to CTOR and return the appended CTOR. */
|
||
|
||
static vec<constructor_elt, va_gc> *
|
||
coverage_obj_fn (vec<constructor_elt, va_gc> *ctor, tree fn,
|
||
struct coverage_data const *data)
|
||
{
|
||
tree init = build_fn_info (data, gcov_fn_info_type, gcov_info_var);
|
||
tree var = build_var (fn, gcov_fn_info_type, -1);
|
||
|
||
DECL_INITIAL (var) = init;
|
||
varpool_finalize_decl (var);
|
||
|
||
CONSTRUCTOR_APPEND_ELT (ctor, NULL,
|
||
build1 (ADDR_EXPR, gcov_fn_info_ptr_type, var));
|
||
return ctor;
|
||
}
|
||
|
||
/* Finalize the coverage data. Generates the array of pointers to
|
||
function objects from CTOR. Generate the gcov_info initializer. */
|
||
|
||
static void
|
||
coverage_obj_finish (vec<constructor_elt, va_gc> *ctor)
|
||
{
|
||
unsigned n_functions = vec_safe_length (ctor);
|
||
tree fn_info_ary_type = build_array_type
|
||
(build_qualified_type (gcov_fn_info_ptr_type, TYPE_QUAL_CONST),
|
||
build_index_type (size_int (n_functions - 1)));
|
||
tree fn_info_ary = build_decl (BUILTINS_LOCATION, VAR_DECL, NULL_TREE,
|
||
fn_info_ary_type);
|
||
char name_buf[32];
|
||
|
||
TREE_STATIC (fn_info_ary) = 1;
|
||
ASM_GENERATE_INTERNAL_LABEL (name_buf, "LPBX", 1);
|
||
DECL_NAME (fn_info_ary) = get_identifier (name_buf);
|
||
DECL_INITIAL (fn_info_ary) = build_constructor (fn_info_ary_type, ctor);
|
||
varpool_finalize_decl (fn_info_ary);
|
||
|
||
DECL_INITIAL (gcov_info_var)
|
||
= build_info (TREE_TYPE (gcov_info_var), fn_info_ary);
|
||
varpool_finalize_decl (gcov_info_var);
|
||
}
|
||
|
||
/* Perform file-level initialization. Read in data file, generate name
|
||
of notes file. */
|
||
|
||
void
|
||
coverage_init (const char *filename)
|
||
{
|
||
int len = strlen (filename);
|
||
int prefix_len = 0;
|
||
|
||
/* Since coverage_init is invoked very early, before the pass
|
||
manager, we need to set up the dumping explicitly. This is
|
||
similar to the handling in finish_optimization_passes. */
|
||
int profile_pass_num =
|
||
g->get_passes ()->get_pass_profile ()->static_pass_number;
|
||
g->get_dumps ()->dump_start (profile_pass_num, NULL);
|
||
|
||
if (!profile_data_prefix && !IS_ABSOLUTE_PATH (filename))
|
||
profile_data_prefix = getpwd ();
|
||
|
||
if (profile_data_prefix)
|
||
prefix_len = strlen (profile_data_prefix);
|
||
|
||
/* Name of da file. */
|
||
da_file_name = XNEWVEC (char, len + strlen (GCOV_DATA_SUFFIX)
|
||
+ prefix_len + 2);
|
||
|
||
if (profile_data_prefix)
|
||
{
|
||
memcpy (da_file_name, profile_data_prefix, prefix_len);
|
||
da_file_name[prefix_len++] = '/';
|
||
}
|
||
memcpy (da_file_name + prefix_len, filename, len);
|
||
strcpy (da_file_name + prefix_len + len, GCOV_DATA_SUFFIX);
|
||
|
||
bbg_file_stamp = local_tick;
|
||
|
||
if (flag_branch_probabilities)
|
||
read_counts_file ();
|
||
|
||
/* Name of bbg file. */
|
||
if (flag_test_coverage && !flag_compare_debug)
|
||
{
|
||
bbg_file_name = XNEWVEC (char, len + strlen (GCOV_NOTE_SUFFIX) + 1);
|
||
memcpy (bbg_file_name, filename, len);
|
||
strcpy (bbg_file_name + len, GCOV_NOTE_SUFFIX);
|
||
|
||
if (!gcov_open (bbg_file_name, -1))
|
||
{
|
||
error ("cannot open %s", bbg_file_name);
|
||
bbg_file_name = NULL;
|
||
}
|
||
else
|
||
{
|
||
gcov_write_unsigned (GCOV_NOTE_MAGIC);
|
||
gcov_write_unsigned (GCOV_VERSION);
|
||
gcov_write_unsigned (bbg_file_stamp);
|
||
}
|
||
}
|
||
|
||
g->get_dumps ()->dump_finish (profile_pass_num);
|
||
}
|
||
|
||
/* Performs file-level cleanup. Close notes file, generate coverage
|
||
variables and constructor. */
|
||
|
||
void
|
||
coverage_finish (void)
|
||
{
|
||
if (bbg_file_name && gcov_close ())
|
||
unlink (bbg_file_name);
|
||
|
||
if (!flag_branch_probabilities && flag_test_coverage
|
||
&& (!local_tick || local_tick == (unsigned)-1))
|
||
/* Only remove the da file, if we're emitting coverage code and
|
||
cannot uniquely stamp it. If we can stamp it, libgcov will DTRT. */
|
||
unlink (da_file_name);
|
||
|
||
if (coverage_obj_init ())
|
||
{
|
||
vec<constructor_elt, va_gc> *fn_ctor = NULL;
|
||
struct coverage_data *fn;
|
||
|
||
for (fn = functions_head; fn; fn = fn->next)
|
||
fn_ctor = coverage_obj_fn (fn_ctor, fn->fn_decl, fn);
|
||
coverage_obj_finish (fn_ctor);
|
||
}
|
||
|
||
XDELETEVEC (da_file_name);
|
||
da_file_name = NULL;
|
||
}
|
||
|
||
#include "gt-coverage.h"
|