--- /dev/null
+/* Read and write coverage files, and associated functionality.
+ Copyright (C) 1990, 1991, 1992, 1993, 1994, 1996, 1997, 1998, 1999,
+ 2000, 2001, 2003, 2004, 2005, 2007, 2008 Free Software Foundation,
+ Inc.
+ Contributed by James E. Wilson, UC Berkeley/Cygnus Support;
+ based on some ideas from Dain Samples of UC Berkeley.
+ Further mangling by Bob Manson, Cygnus Support.
+ Further mangled by Nathan Sidwell, CodeSourcery
+
+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.
+
+You should have received a copy of the GNU General Public License
+along with GCC; see the file COPYING3. If not see
+<http://www.gnu.org/licenses/>. */
+
+
+#define GCOV_LINKAGE
+
+#include "config.h"
+#include "system.h"
+#include "coretypes.h"
+#include "tm.h"
+#include "rtl.h"
+#include "tree.h"
+#include "flags.h"
+#include "output.h"
+#include "regs.h"
+#include "expr.h"
+#include "function.h"
+#include "toplev.h"
+#include "tm_p.h"
+#include "ggc.h"
+#include "coverage.h"
+#include "langhooks.h"
+#include "hashtab.h"
+#include "tree-iterator.h"
+#include "cgraph.h"
+#include "tree-pass.h"
+
+#include "gcov-io.c"
+
+struct function_list
+{
+ struct function_list *next; /* next function */
+ unsigned ident; /* function ident */
+ unsigned checksum; /* function checksum */
+ unsigned n_ctrs[GCOV_COUNTERS];/* number of counters. */
+};
+
+/* Counts information for a function. */
+typedef struct counts_entry
+{
+ /* We hash by */
+ unsigned ident;
+ unsigned ctr;
+
+ /* Store */
+ unsigned checksum;
+ gcov_type *counts;
+ struct gcov_ctr_summary summary;
+
+ /* Workspace */
+ struct counts_entry *chain;
+
+} counts_entry_t;
+
+static struct function_list *functions_head = 0;
+static struct function_list **functions_tail = &functions_head;
+static unsigned no_coverage = 0;
+
+/* Cumulative counter information for whole program. */
+static unsigned prg_ctr_mask; /* Mask of counter types generated. */
+static unsigned prg_n_ctrs[GCOV_COUNTERS]; /* Total counters allocated. */
+
+/* Counter information for current function. */
+static unsigned fn_ctr_mask; /* Mask of counters used. */
+static unsigned fn_n_ctrs[GCOV_COUNTERS]; /* Counters allocated. */
+static unsigned fn_b_ctrs[GCOV_COUNTERS]; /* Allocation base. */
+
+/* Name of the output file for coverage output file. */
+static char *bbg_file_name;
+static unsigned bbg_file_opened;
+static int bbg_function_announced;
+
+/* Name of the count data file. */
+static char *da_file_name;
+
+/* Hash table of count data. */
+static htab_t counts_hash = NULL;
+
+/* Trees representing the counter table arrays. */
+static GTY(()) tree tree_ctr_tables[GCOV_COUNTERS];
+
+/* The names of the counter tables. Not used if we're
+ generating counters at tree level. */
+static GTY(()) rtx ctr_labels[GCOV_COUNTERS];
+
+/* The names of merge functions for counters. */
+static const char *const ctr_merge_functions[GCOV_COUNTERS] = GCOV_MERGE_FUNCTIONS;
+static const char *const ctr_names[GCOV_COUNTERS] = GCOV_COUNTER_NAMES;
+
+/* Forward declarations. */
+static hashval_t htab_counts_entry_hash (const void *);
+static int htab_counts_entry_eq (const void *, const void *);
+static void htab_counts_entry_del (void *);
+static void read_counts_file (void);
+static unsigned compute_checksum (void);
+static unsigned coverage_checksum_string (unsigned, const char *);
+static tree build_fn_info_type (unsigned);
+static tree build_fn_info_value (const struct function_list *, tree);
+static tree build_ctr_info_type (void);
+static tree build_ctr_info_value (unsigned, tree);
+static tree build_gcov_info (void);
+static void create_coverage (void);
+\f
+/* Return the type node for gcov_type. */
+
+tree
+get_gcov_type (void)
+{
+ return lang_hooks.types.type_for_size (GCOV_TYPE_SIZE, false);
+}
+
+/* Return the type node for gcov_unsigned_t. */
+
+static tree
+get_gcov_unsigned_t (void)
+{
+ return lang_hooks.types.type_for_size (32, true);
+}
+\f
+static hashval_t
+htab_counts_entry_hash (const void *of)
+{
+ const counts_entry_t *const entry = (const counts_entry_t *) of;
+
+ return entry->ident * GCOV_COUNTERS + entry->ctr;
+}
+
+static int
+htab_counts_entry_eq (const void *of1, const void *of2)
+{
+ const counts_entry_t *const entry1 = (const counts_entry_t *) of1;
+ const counts_entry_t *const entry2 = (const counts_entry_t *) of2;
+
+ return entry1->ident == entry2->ident && entry1->ctr == entry2->ctr;
+}
+
+static void
+htab_counts_entry_del (void *of)
+{
+ counts_entry_t *const entry = (counts_entry_t *) of;
+
+ free (entry->counts);
+ free (entry);
+}
+
+/* Read in the counts file, if available. */
+
+static void
+read_counts_file (void)
+{
+ gcov_unsigned_t fn_ident = 0;
+ gcov_unsigned_t checksum = -1;
+ counts_entry_t *summaried = NULL;
+ unsigned seen_summary = 0;
+ gcov_unsigned_t tag;
+ int is_error = 0;
+
+ if (!gcov_open (da_file_name, 1))
+ return;
+
+ if (!gcov_magic (gcov_read_unsigned (), GCOV_DATA_MAGIC))
+ {
+ warning (0, "%qs is not a gcov data file", da_file_name);
+ gcov_close ();
+ return;
+ }
+ else if ((tag = gcov_read_unsigned ()) != GCOV_VERSION)
+ {
+ char v[4], e[4];
+
+ GCOV_UNSIGNED2STRING (v, tag);
+ GCOV_UNSIGNED2STRING (e, GCOV_VERSION);
+
+ warning (0, "%qs is version %q.*s, expected version %q.*s",
+ da_file_name, 4, v, 4, e);
+ gcov_close ();
+ return;
+ }
+
+ /* Read and discard the stamp. */
+ gcov_read_unsigned ();
+
+ counts_hash = htab_create (10,
+ htab_counts_entry_hash, htab_counts_entry_eq,
+ htab_counts_entry_del);
+ while ((tag = gcov_read_unsigned ()))
+ {
+ gcov_unsigned_t length;
+ gcov_position_t offset;
+
+ length = gcov_read_unsigned ();
+ offset = gcov_position ();
+ if (tag == GCOV_TAG_FUNCTION)
+ {
+ fn_ident = gcov_read_unsigned ();
+ checksum = gcov_read_unsigned ();
+ if (seen_summary)
+ {
+ /* We have already seen a summary, this means that this
+ new function begins a new set of program runs. We
+ must unlink the summaried chain. */
+ counts_entry_t *entry, *chain;
+
+ for (entry = summaried; entry; entry = chain)
+ {
+ chain = entry->chain;
+ entry->chain = NULL;
+ }
+ summaried = NULL;
+ seen_summary = 0;
+ }
+ }
+ else if (tag == GCOV_TAG_PROGRAM_SUMMARY)
+ {
+ counts_entry_t *entry;
+ struct gcov_summary summary;
+
+ gcov_read_summary (&summary);
+ seen_summary = 1;
+ for (entry = summaried; entry; entry = entry->chain)
+ {
+ struct gcov_ctr_summary *csum = &summary.ctrs[entry->ctr];
+
+ entry->summary.runs += csum->runs;
+ entry->summary.sum_all += csum->sum_all;
+ if (entry->summary.run_max < csum->run_max)
+ entry->summary.run_max = csum->run_max;
+ entry->summary.sum_max += csum->sum_max;
+ }
+ }
+ else if (GCOV_TAG_IS_COUNTER (tag) && fn_ident)
+ {
+ counts_entry_t **slot, *entry, elt;
+ unsigned n_counts = GCOV_TAG_COUNTER_NUM (length);
+ unsigned ix;
+
+ elt.ident = fn_ident;
+ elt.ctr = GCOV_COUNTER_FOR_TAG (tag);
+
+ slot = (counts_entry_t **) htab_find_slot
+ (counts_hash, &elt, INSERT);
+ entry = *slot;
+ if (!entry)
+ {
+ *slot = entry = XCNEW (counts_entry_t);
+ entry->ident = elt.ident;
+ entry->ctr = elt.ctr;
+ entry->checksum = checksum;
+ entry->summary.num = n_counts;
+ entry->counts = XCNEWVEC (gcov_type, n_counts);
+ }
+ else if (entry->checksum != checksum)
+ {
+ error ("coverage mismatch for function %u while reading execution counters",
+ fn_ident);
+ error ("checksum is %x instead of %x", entry->checksum, checksum);
+ htab_delete (counts_hash);
+ break;
+ }
+ else if (entry->summary.num != n_counts)
+ {
+ error ("coverage mismatch for function %u while reading execution counters",
+ fn_ident);
+ error ("number of counters is %d instead of %d", entry->summary.num, n_counts);
+ htab_delete (counts_hash);
+ break;
+ }
+ else if (elt.ctr >= GCOV_COUNTERS_SUMMABLE)
+ {
+ error ("cannot merge separate %s counters for function %u",
+ ctr_names[elt.ctr], fn_ident);
+ goto skip_merge;
+ }
+
+ if (elt.ctr < GCOV_COUNTERS_SUMMABLE
+ /* This should always be true for a just allocated entry,
+ and always false for an existing one. Check this way, in
+ case the gcov file is corrupt. */
+ && (!entry->chain || summaried != entry))
+ {
+ entry->chain = summaried;
+ summaried = entry;
+ }
+ for (ix = 0; ix != n_counts; ix++)
+ entry->counts[ix] += gcov_read_counter ();
+ skip_merge:;
+ }
+ gcov_sync (offset, length);
+ if ((is_error = gcov_is_error ()))
+ {
+ error (is_error < 0 ? "%qs has overflowed" : "%qs is corrupted",
+ da_file_name);
+ htab_delete (counts_hash);
+ break;
+ }
+ }
+
+ gcov_close ();
+}
+
+/* Returns the counters for a particular tag. */
+
+gcov_type *
+get_coverage_counts (unsigned counter, unsigned expected,
+ const struct gcov_ctr_summary **summary)
+{
+ counts_entry_t *entry, elt;
+ gcov_unsigned_t checksum = -1;
+
+ /* No hash table, no counts. */
+ if (!counts_hash)
+ {
+ static int warned = 0;
+
+ if (!warned++)
+ inform (input_location, (flag_guess_branch_prob
+ ? "file %s not found, execution counts estimated"
+ : "file %s not found, execution counts assumed to be zero"),
+ da_file_name);
+ return NULL;
+ }
+
+ elt.ident = current_function_funcdef_no + 1;
+ elt.ctr = counter;
+ entry = (counts_entry_t *) htab_find (counts_hash, &elt);
+ if (!entry)
+ {
+ warning (0, "no coverage for function %qs found", IDENTIFIER_POINTER
+ (DECL_ASSEMBLER_NAME (current_function_decl)));
+ return NULL;
+ }
+
+ checksum = compute_checksum ();
+ if (entry->checksum != checksum
+ || entry->summary.num != expected)
+ {
+ static int warned = 0;
+ const char *id = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME
+ (current_function_decl));
+
+ if (warn_coverage_mismatch)
+ warning (OPT_Wcoverage_mismatch, "coverage mismatch for function "
+ "%qs while reading counter %qs", id, ctr_names[counter]);
+ else
+ error ("coverage mismatch for function %qs while reading counter %qs",
+ id, ctr_names[counter]);
+
+ if (!inhibit_warnings)
+ {
+ if (entry->checksum != checksum)
+ inform (input_location, "checksum is %x instead of %x", entry->checksum, checksum);
+ else
+ inform (input_location, "number of counters is %d instead of %d",
+ entry->summary.num, expected);
+ }
+
+ if (warn_coverage_mismatch
+ && !inhibit_warnings
+ && !warned++)
+ {
+ inform (input_location, "coverage mismatch ignored due to -Wcoverage-mismatch");
+ inform (input_location, flag_guess_branch_prob
+ ? "execution counts estimated"
+ : "execution counts assumed to be zero");
+ if (!flag_guess_branch_prob)
+ inform (input_location, "this can result in poorly optimized code");
+ }
+
+ return NULL;
+ }
+
+ 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 (!tree_ctr_tables[counter])
+ {
+ /* Generate and save a copy of this so it can be shared. Leave
+ the index type unspecified for now; it will be set after all
+ functions have been compiled. */
+ char buf[20];
+ tree gcov_type_node = get_gcov_type ();
+ tree gcov_type_array_type
+ = build_array_type (gcov_type_node, NULL_TREE);
+ tree_ctr_tables[counter]
+ = build_decl (VAR_DECL, NULL_TREE, gcov_type_array_type);
+ TREE_STATIC (tree_ctr_tables[counter]) = 1;
+ ASM_GENERATE_INTERNAL_LABEL (buf, "LPBX", counter + 1);
+ DECL_NAME (tree_ctr_tables[counter]) = get_identifier (buf);
+ DECL_ALIGN (tree_ctr_tables[counter]) = TYPE_ALIGN (gcov_type_node);
+
+ if (dump_file)
+ fprintf (dump_file, "Using data file %s\n", da_file_name);
+ }
+ 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 += prg_n_ctrs[counter] + fn_b_ctrs[counter];
+
+ /* "no" here is an array index, scaled to bytes later. */
+ return build4 (ARRAY_REF, gcov_type_node, tree_ctr_tables[counter],
+ build_int_cst (NULL_TREE, 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 += prg_n_ctrs[counter] + 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,
+ tree_ctr_tables[counter],
+ build_int_cst (NULL_TREE, no),
+ NULL, NULL));
+}
+\f
+/* 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);
+ if (dup)
+ free (dup);
+
+ return chksum;
+}
+
+/* Compute checksum for the current function. We generate a CRC32. */
+
+static unsigned
+compute_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;
+}
+\f
+/* Begin output to the graph file for the current function.
+ Opens the output file, if not already done. Writes the
+ function header, if not already done. Returns nonzero if data
+ should be output. */
+
+int
+coverage_begin_output (void)
+{
+ /* 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 || !flag_test_coverage)
+ return 0;
+
+ if (!bbg_function_announced)
+ {
+ expanded_location xloc
+ = expand_location (DECL_SOURCE_LOCATION (current_function_decl));
+ unsigned long offset;
+
+ if (!bbg_file_opened)
+ {
+ if (!gcov_open (bbg_file_name, -1))
+ error ("cannot open %s", bbg_file_name);
+ else
+ {
+ gcov_write_unsigned (GCOV_NOTE_MAGIC);
+ gcov_write_unsigned (GCOV_VERSION);
+ gcov_write_unsigned (local_tick);
+ }
+ bbg_file_opened = 1;
+ }
+
+ /* Announce function */
+ offset = gcov_write_tag (GCOV_TAG_FUNCTION);
+ gcov_write_unsigned (current_function_funcdef_no + 1);
+ gcov_write_unsigned (compute_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);
+
+ bbg_function_announced = 1;
+ }
+ 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 (void)
+{
+ unsigned i;
+
+ if (bbg_file_opened > 1 && gcov_is_error ())
+ {
+ warning (0, "error writing %qs", bbg_file_name);
+ bbg_file_opened = -1;
+ }
+
+ if (fn_ctr_mask)
+ {
+ struct function_list *item;
+
+ item = XNEW (struct function_list);
+
+ *functions_tail = item;
+ functions_tail = &item->next;
+
+ item->next = 0;
+ item->ident = current_function_funcdef_no + 1;
+ item->checksum = compute_checksum ();
+ for (i = 0; i != GCOV_COUNTERS; i++)
+ {
+ item->n_ctrs[i] = fn_n_ctrs[i];
+ prg_n_ctrs[i] += fn_n_ctrs[i];
+ fn_n_ctrs[i] = fn_b_ctrs[i] = 0;
+ }
+ prg_ctr_mask |= fn_ctr_mask;
+ fn_ctr_mask = 0;
+ }
+ bbg_function_announced = 0;
+}
+
+/* Creates the gcov_fn_info RECORD_TYPE. */
+
+static tree
+build_fn_info_type (unsigned int counters)
+{
+ tree type = lang_hooks.types.make_type (RECORD_TYPE);
+ tree field, fields;
+ tree array_type;
+
+ /* ident */
+ fields = build_decl (FIELD_DECL, NULL_TREE, get_gcov_unsigned_t ());
+
+ /* checksum */
+ field = build_decl (FIELD_DECL, NULL_TREE, get_gcov_unsigned_t ());
+ TREE_CHAIN (field) = fields;
+ fields = field;
+
+ array_type = build_int_cst (NULL_TREE, counters - 1);
+ array_type = build_index_type (array_type);
+ array_type = build_array_type (get_gcov_unsigned_t (), array_type);
+
+ /* counters */
+ field = build_decl (FIELD_DECL, NULL_TREE, array_type);
+ TREE_CHAIN (field) = fields;
+ fields = field;
+
+ finish_builtin_struct (type, "__gcov_fn_info", fields, NULL_TREE);
+
+ return type;
+}
+
+/* Creates a CONSTRUCTOR for a gcov_fn_info. FUNCTION is
+ the function being processed and TYPE is the gcov_fn_info
+ RECORD_TYPE. */
+
+static tree
+build_fn_info_value (const struct function_list *function, tree type)
+{
+ tree value = NULL_TREE;
+ tree fields = TYPE_FIELDS (type);
+ unsigned ix;
+ tree array_value = NULL_TREE;
+
+ /* ident */
+ value = tree_cons (fields, build_int_cstu (get_gcov_unsigned_t (),
+ function->ident), value);
+ fields = TREE_CHAIN (fields);
+
+ /* checksum */
+ value = tree_cons (fields, build_int_cstu (get_gcov_unsigned_t (),
+ function->checksum), value);
+ fields = TREE_CHAIN (fields);
+
+ /* counters */
+ for (ix = 0; ix != GCOV_COUNTERS; ix++)
+ if (prg_ctr_mask & (1 << ix))
+ {
+ tree counters = build_int_cstu (get_gcov_unsigned_t (),
+ function->n_ctrs[ix]);
+
+ array_value = tree_cons (NULL_TREE, counters, array_value);
+ }
+
+ /* FIXME: use build_constructor directly. */
+ array_value = build_constructor_from_list (TREE_TYPE (fields),
+ nreverse (array_value));
+ value = tree_cons (fields, array_value, value);
+
+ /* FIXME: use build_constructor directly. */
+ value = build_constructor_from_list (type, nreverse (value));
+
+ return value;
+}
+
+/* Creates the gcov_ctr_info RECORD_TYPE. */
+
+static tree
+build_ctr_info_type (void)
+{
+ tree type = lang_hooks.types.make_type (RECORD_TYPE);
+ tree field, fields = NULL_TREE;
+ tree gcov_ptr_type = build_pointer_type (get_gcov_type ());
+ tree gcov_merge_fn_type;
+
+ /* counters */
+ field = build_decl (FIELD_DECL, NULL_TREE, get_gcov_unsigned_t ());
+ TREE_CHAIN (field) = fields;
+ fields = field;
+
+ /* values */
+ field = build_decl (FIELD_DECL, NULL_TREE, gcov_ptr_type);
+ TREE_CHAIN (field) = fields;
+ fields = field;
+
+ /* merge */
+ gcov_merge_fn_type =
+ build_function_type_list (void_type_node,
+ gcov_ptr_type, get_gcov_unsigned_t (),
+ NULL_TREE);
+ field = build_decl (FIELD_DECL, NULL_TREE,
+ build_pointer_type (gcov_merge_fn_type));
+ TREE_CHAIN (field) = fields;
+ fields = field;
+
+ finish_builtin_struct (type, "__gcov_ctr_info", fields, NULL_TREE);
+
+ return type;
+}
+
+/* Creates a CONSTRUCTOR for a gcov_ctr_info. COUNTER is
+ the counter being processed and TYPE is the gcov_ctr_info
+ RECORD_TYPE. */
+
+static tree
+build_ctr_info_value (unsigned int counter, tree type)
+{
+ tree value = NULL_TREE;
+ tree fields = TYPE_FIELDS (type);
+ tree fn;
+
+ /* counters */
+ value = tree_cons (fields,
+ build_int_cstu (get_gcov_unsigned_t (),
+ prg_n_ctrs[counter]),
+ value);
+ fields = TREE_CHAIN (fields);
+
+ if (prg_n_ctrs[counter])
+ {
+ tree array_type;
+
+ array_type = build_int_cstu (get_gcov_unsigned_t (),
+ prg_n_ctrs[counter] - 1);
+ array_type = build_index_type (array_type);
+ array_type = build_array_type (TREE_TYPE (TREE_TYPE (fields)),
+ array_type);
+
+ TREE_TYPE (tree_ctr_tables[counter]) = array_type;
+ DECL_SIZE (tree_ctr_tables[counter]) = TYPE_SIZE (array_type);
+ DECL_SIZE_UNIT (tree_ctr_tables[counter]) = TYPE_SIZE_UNIT (array_type);
+ assemble_variable (tree_ctr_tables[counter], 0, 0, 0);
+
+ value = tree_cons (fields,
+ build1 (ADDR_EXPR, TREE_TYPE (fields),
+ tree_ctr_tables[counter]),
+ value);
+ }
+ else
+ value = tree_cons (fields, null_pointer_node, value);
+ fields = TREE_CHAIN (fields);
+
+ fn = build_decl (FUNCTION_DECL,
+ get_identifier (ctr_merge_functions[counter]),
+ TREE_TYPE (TREE_TYPE (fields)));
+ DECL_EXTERNAL (fn) = 1;
+ TREE_PUBLIC (fn) = 1;
+ DECL_ARTIFICIAL (fn) = 1;
+ TREE_NOTHROW (fn) = 1;
+ value = tree_cons (fields,
+ build1 (ADDR_EXPR, TREE_TYPE (fields), fn),
+ value);
+
+ /* FIXME: use build_constructor directly. */
+ value = build_constructor_from_list (type, nreverse (value));
+
+ return value;
+}
+
+/* Creates the gcov_info RECORD_TYPE and initializer for it. Returns a
+ CONSTRUCTOR. */
+
+static tree
+build_gcov_info (void)
+{
+ unsigned n_ctr_types, ix;
+ tree type, const_type;
+ tree fn_info_type, fn_info_value = NULL_TREE;
+ tree fn_info_ptr_type;
+ tree ctr_info_type, ctr_info_ary_type, ctr_info_value = NULL_TREE;
+ tree field, fields = NULL_TREE;
+ tree value = NULL_TREE;
+ tree filename_string;
+ int da_file_name_len;
+ unsigned n_fns;
+ const struct function_list *fn;
+ tree string_type;
+
+ /* Count the number of active counters. */
+ for (n_ctr_types = 0, ix = 0; ix != GCOV_COUNTERS; ix++)
+ if (prg_ctr_mask & (1 << ix))
+ n_ctr_types++;
+
+ type = lang_hooks.types.make_type (RECORD_TYPE);
+ const_type = build_qualified_type (type, TYPE_QUAL_CONST);
+
+ /* Version ident */
+ field = build_decl (FIELD_DECL, NULL_TREE, get_gcov_unsigned_t ());
+ TREE_CHAIN (field) = fields;
+ fields = field;
+ value = tree_cons (field, build_int_cstu (TREE_TYPE (field), GCOV_VERSION),
+ value);
+
+ /* next -- NULL */
+ field = build_decl (FIELD_DECL, NULL_TREE, build_pointer_type (const_type));
+ TREE_CHAIN (field) = fields;
+ fields = field;
+ value = tree_cons (field, null_pointer_node, value);
+
+ /* stamp */
+ field = build_decl (FIELD_DECL, NULL_TREE, get_gcov_unsigned_t ());
+ TREE_CHAIN (field) = fields;
+ fields = field;
+ value = tree_cons (field, build_int_cstu (TREE_TYPE (field), local_tick),
+ value);
+
+ /* Filename */
+ string_type = build_pointer_type (build_qualified_type (char_type_node,
+ TYPE_QUAL_CONST));
+ field = build_decl (FIELD_DECL, NULL_TREE, string_type);
+ TREE_CHAIN (field) = fields;
+ fields = field;
+ 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
+ (build_int_cst (NULL_TREE, da_file_name_len)));
+ value = tree_cons (field, build1 (ADDR_EXPR, string_type, filename_string),
+ value);
+
+ /* Build the fn_info type and initializer. */
+ fn_info_type = build_fn_info_type (n_ctr_types);
+ fn_info_ptr_type = build_pointer_type (build_qualified_type
+ (fn_info_type, TYPE_QUAL_CONST));
+ for (fn = functions_head, n_fns = 0; fn; fn = fn->next, n_fns++)
+ fn_info_value = tree_cons (NULL_TREE,
+ build_fn_info_value (fn, fn_info_type),
+ fn_info_value);
+ if (n_fns)
+ {
+ tree array_type;
+
+ array_type = build_index_type (build_int_cst (NULL_TREE, n_fns - 1));
+ array_type = build_array_type (fn_info_type, array_type);
+
+ /* FIXME: use build_constructor directly. */
+ fn_info_value = build_constructor_from_list (array_type,
+ nreverse (fn_info_value));
+ fn_info_value = build1 (ADDR_EXPR, fn_info_ptr_type, fn_info_value);
+ }
+ else
+ fn_info_value = null_pointer_node;
+
+ /* number of functions */
+ field = build_decl (FIELD_DECL, NULL_TREE, get_gcov_unsigned_t ());
+ TREE_CHAIN (field) = fields;
+ fields = field;
+ value = tree_cons (field,
+ build_int_cstu (get_gcov_unsigned_t (), n_fns),
+ value);
+
+ /* fn_info table */
+ field = build_decl (FIELD_DECL, NULL_TREE, fn_info_ptr_type);
+ TREE_CHAIN (field) = fields;
+ fields = field;
+ value = tree_cons (field, fn_info_value, value);
+
+ /* counter_mask */
+ field = build_decl (FIELD_DECL, NULL_TREE, get_gcov_unsigned_t ());
+ TREE_CHAIN (field) = fields;
+ fields = field;
+ value = tree_cons (field,
+ build_int_cstu (get_gcov_unsigned_t (), prg_ctr_mask),
+ value);
+
+ /* counters */
+ ctr_info_type = build_ctr_info_type ();
+ ctr_info_ary_type = build_index_type (build_int_cst (NULL_TREE,
+ n_ctr_types));
+ ctr_info_ary_type = build_array_type (ctr_info_type, ctr_info_ary_type);
+ for (ix = 0; ix != GCOV_COUNTERS; ix++)
+ if (prg_ctr_mask & (1 << ix))
+ ctr_info_value = tree_cons (NULL_TREE,
+ build_ctr_info_value (ix, ctr_info_type),
+ ctr_info_value);
+ /* FIXME: use build_constructor directly. */
+ ctr_info_value = build_constructor_from_list (ctr_info_ary_type,
+ nreverse (ctr_info_value));
+
+ field = build_decl (FIELD_DECL, NULL_TREE, ctr_info_ary_type);
+ TREE_CHAIN (field) = fields;
+ fields = field;
+ value = tree_cons (field, ctr_info_value, value);
+
+ finish_builtin_struct (type, "__gcov_info", fields, NULL_TREE);
+
+ /* FIXME: use build_constructor directly. */
+ value = build_constructor_from_list (type, nreverse (value));
+
+ return value;
+}
+
+/* Write out the structure which libgcov uses to locate all the
+ counters. The structures used here must match those defined in
+ gcov-io.h. Write out the constructor to call __gcov_init. */
+
+static void
+create_coverage (void)
+{
+ tree gcov_info, gcov_init, body, t;
+ char name_buf[32];
+
+ no_coverage = 1; /* Disable any further coverage. */
+
+ if (!prg_ctr_mask)
+ return;
+
+ t = build_gcov_info ();
+
+ gcov_info = build_decl (VAR_DECL, NULL_TREE, TREE_TYPE (t));
+ TREE_STATIC (gcov_info) = 1;
+ ASM_GENERATE_INTERNAL_LABEL (name_buf, "LPBX", 0);
+ DECL_NAME (gcov_info) = get_identifier (name_buf);
+ DECL_INITIAL (gcov_info) = t;
+
+ /* Build structure. */
+ assemble_variable (gcov_info, 0, 0, 0);
+
+ /* Build a decl for __gcov_init. */
+ t = build_pointer_type (TREE_TYPE (gcov_info));
+ t = build_function_type_list (void_type_node, t, NULL);
+ t = build_decl (FUNCTION_DECL, get_identifier ("__gcov_init"), t);
+ TREE_PUBLIC (t) = 1;
+ DECL_EXTERNAL (t) = 1;
+ gcov_init = t;
+
+ /* Generate a call to __gcov_init(&gcov_info). */
+ body = NULL;
+ t = build_fold_addr_expr (gcov_info);
+ t = build_call_expr (gcov_init, 1, t);
+ append_to_statement_list (t, &body);
+
+ /* Generate a constructor to run it. */
+ cgraph_build_static_cdtor ('I', body, DEFAULT_INIT_PRIORITY);
+}
+\f
+/* Perform file-level initialization. Read in data file, generate name
+ of graph file. */
+
+void
+coverage_init (const char *filename)
+{
+ int len = strlen (filename);
+ /* + 1 for extra '/', in case prefix doesn't end with /. */
+ int prefix_len;
+
+ if (profile_data_prefix == 0 && filename[0] != '/')
+ profile_data_prefix = getpwd ();
+
+ prefix_len = (profile_data_prefix) ? strlen (profile_data_prefix) + 1 : 0;
+
+ /* Name of da file. */
+ da_file_name = XNEWVEC (char, len + strlen (GCOV_DATA_SUFFIX)
+ + prefix_len + 1);
+
+ if (profile_data_prefix)
+ {
+ strcpy (da_file_name, profile_data_prefix);
+ da_file_name[prefix_len - 1] = '/';
+ da_file_name[prefix_len] = 0;
+ }
+ else
+ da_file_name[0] = 0;
+ strcat (da_file_name, filename);
+ strcat (da_file_name, GCOV_DATA_SUFFIX);
+
+ /* Name of bbg file. */
+ bbg_file_name = XNEWVEC (char, len + strlen (GCOV_NOTE_SUFFIX) + 1);
+ strcpy (bbg_file_name, filename);
+ strcat (bbg_file_name, GCOV_NOTE_SUFFIX);
+
+ if (flag_profile_use)
+ read_counts_file ();
+}
+
+/* Performs file-level cleanup. Close graph file, generate coverage
+ variables and constructor. */
+
+void
+coverage_finish (void)
+{
+ create_coverage ();
+ if (bbg_file_opened)
+ {
+ int error = gcov_close ();
+
+ if (error)
+ unlink (bbg_file_name);
+ if (!local_tick)
+ /* Only remove the da file, if we cannot stamp it. If we can
+ stamp it, libgcov will DTRT. */
+ unlink (da_file_name);
+ }
+}
+
+#include "gt-coverage.h"
projects / msp430-gcc.git / blobdiff