From af0c51ac87ab2a87caa03fa108f0d164987a2764 Mon Sep 17 00:00:00 2001 From: Ben Cheng Date: Thu, 28 Mar 2013 11:14:20 -0700 Subject: [GCC 4.8] Initial check-in of GCC 4.8.0 Change-Id: I0719d8a6d0f69b367a6ab6f10eb75622dbf12771 --- gcc-4.8/gcc/coverage.c | 1166 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 1166 insertions(+) create mode 100644 gcc-4.8/gcc/coverage.c (limited to 'gcc-4.8/gcc/coverage.c') diff --git a/gcc-4.8/gcc/coverage.c b/gcc-4.8/gcc/coverage.c new file mode 100644 index 000000000..bc6a46f5f --- /dev/null +++ b/gcc-4.8/gcc/coverage.c @@ -0,0 +1,1166 @@ +/* Read and write coverage files, and associated functionality. + Copyright (C) 1990-2013 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 +. */ + + +#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 "basic-block.h" +#include "toplev.h" +#include "tm_p.h" +#include "ggc.h" +#include "coverage.h" +#include "langhooks.h" +#include "hash-table.h" +#include "tree-iterator.h" +#include "cgraph.h" +#include "dumpfile.h" +#include "diagnostic-core.h" +#include "intl.h" +#include "filenames.h" +#include "target.h" + +#include "gcov-io.h" +#include "gcov-io.c" + +struct GTY((chain_next ("%h.next"))) coverage_data +{ + struct coverage_data *next; /* next function */ + unsigned ident; /* function ident */ + unsigned lineno_checksum; /* function lineno checksum */ + unsigned cfg_checksum; /* function cfg checksum */ + tree fn_decl; /* the function decl */ + tree ctr_vars[GCOV_COUNTERS]; /* counter variables. */ +}; + +/* Counts information for a function. */ +typedef struct counts_entry +{ + /* We hash by */ + unsigned ident; + unsigned ctr; + + /* Store */ + unsigned lineno_checksum; + unsigned cfg_checksum; + gcov_type *counts; + struct gcov_ctr_summary summary; + + /* hash_table support. */ + typedef counts_entry value_type; + typedef counts_entry compare_type; + static inline hashval_t hash (const value_type *); + static int equal (const value_type *, const compare_type *); + static void remove (value_type *); +} counts_entry_t; + +static GTY(()) struct coverage_data *functions_head = 0; +static struct coverage_data **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. */ + +/* Counter information for current function. */ +static unsigned fn_ctr_mask; /* Mask of counters used. */ +static GTY(()) tree fn_v_ctrs[GCOV_COUNTERS]; /* counter variables. */ +static unsigned fn_n_ctrs[GCOV_COUNTERS]; /* Counters allocated. */ +static unsigned fn_b_ctrs[GCOV_COUNTERS]; /* Allocation base. */ + +/* Coverage info VAR_DECL and function info type nodes. */ +static GTY(()) tree gcov_info_var; +static GTY(()) tree gcov_fn_info_type; +static GTY(()) tree gcov_fn_info_ptr_type; + +/* Name of the notes (gcno) output file. The "bbg" prefix is for + historical reasons, when the notes file contained only the + basic block graph notes. + If this is NULL we're not writing to the notes file. */ +static char *bbg_file_name; + +/* File stamp for notes file. */ +static unsigned bbg_file_stamp; + +/* Name of the count data (gcda) file. */ +static char *da_file_name; + +/* 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 void read_counts_file (void); +static tree build_var (tree, tree, int); +static void build_fn_info_type (tree, unsigned, tree); +static void build_info_type (tree, tree); +static tree build_fn_info (const struct coverage_data *, tree, tree); +static tree build_info (tree, tree); +static bool coverage_obj_init (void); +static vec *coverage_obj_fn +(vec *, tree, struct coverage_data const *); +static void coverage_obj_finish (vec *); + +/* Return the type node for gcov_type. */ + +tree +get_gcov_type (void) +{ + enum machine_mode mode = smallest_mode_for_size (GCOV_TYPE_SIZE, MODE_INT); + return lang_hooks.types.type_for_mode (mode, false); +} + +/* Return the type node for gcov_unsigned_t. */ + +static tree +get_gcov_unsigned_t (void) +{ + enum machine_mode mode = smallest_mode_for_size (32, MODE_INT); + return lang_hooks.types.type_for_mode (mode, true); +} + +inline hashval_t +counts_entry::hash (const value_type *entry) +{ + return entry->ident * GCOV_COUNTERS + entry->ctr; +} + +inline int +counts_entry::equal (const value_type *entry1, + const compare_type *entry2) +{ + return entry1->ident == entry2->ident && entry1->ctr == entry2->ctr; +} + +inline void +counts_entry::remove (value_type *entry) +{ + free (entry->counts); + free (entry); +} + +/* Hash table of count data. */ +static hash_table counts_hash; + +/* Read in the counts file, if available. */ + +static void +read_counts_file (void) +{ + gcov_unsigned_t fn_ident = 0; + struct gcov_summary summary; + unsigned new_summary = 1; + gcov_unsigned_t tag; + int is_error = 0; + unsigned lineno_checksum = 0; + unsigned cfg_checksum = 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 the stamp, used for creating a generation count. */ + tag = gcov_read_unsigned (); + bbg_file_stamp = crc32_unsigned (bbg_file_stamp, tag); + + counts_hash.create (10); + 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) + { + if (length) + { + fn_ident = gcov_read_unsigned (); + lineno_checksum = gcov_read_unsigned (); + cfg_checksum = gcov_read_unsigned (); + } + else + fn_ident = lineno_checksum = cfg_checksum = 0; + new_summary = 1; + } + else if (tag == GCOV_TAG_PROGRAM_SUMMARY) + { + struct gcov_summary sum; + unsigned ix; + + if (new_summary) + memset (&summary, 0, sizeof (summary)); + + gcov_read_summary (&sum); + for (ix = 0; ix != GCOV_COUNTERS_SUMMABLE; ix++) + { + summary.ctrs[ix].runs += sum.ctrs[ix].runs; + summary.ctrs[ix].sum_all += sum.ctrs[ix].sum_all; + if (summary.ctrs[ix].run_max < sum.ctrs[ix].run_max) + summary.ctrs[ix].run_max = sum.ctrs[ix].run_max; + summary.ctrs[ix].sum_max += sum.ctrs[ix].sum_max; + } + if (new_summary) + memcpy (summary.ctrs[GCOV_COUNTER_ARCS].histogram, + sum.ctrs[GCOV_COUNTER_ARCS].histogram, + sizeof (gcov_bucket_type) * GCOV_HISTOGRAM_SIZE); + else + gcov_histogram_merge (summary.ctrs[GCOV_COUNTER_ARCS].histogram, + sum.ctrs[GCOV_COUNTER_ARCS].histogram); + new_summary = 0; + } + 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_hash.find_slot (&elt, INSERT); + entry = *slot; + if (!entry) + { + *slot = entry = XCNEW (counts_entry_t); + entry->ident = fn_ident; + entry->ctr = elt.ctr; + entry->lineno_checksum = lineno_checksum; + entry->cfg_checksum = cfg_checksum; + if (elt.ctr < GCOV_COUNTERS_SUMMABLE) + entry->summary = summary.ctrs[elt.ctr]; + entry->summary.num = n_counts; + entry->counts = XCNEWVEC (gcov_type, n_counts); + } + else if (entry->lineno_checksum != lineno_checksum + || entry->cfg_checksum != cfg_checksum) + { + error ("Profile data for function %u is corrupted", fn_ident); + error ("checksum is (%x,%x) instead of (%x,%x)", + entry->lineno_checksum, entry->cfg_checksum, + lineno_checksum, cfg_checksum); + counts_hash.dispose (); + break; + } + else if (entry->summary.num != n_counts) + { + error ("Profile data for function %u is corrupted", fn_ident); + error ("number of counters is %d instead of %d", entry->summary.num, n_counts); + counts_hash.dispose (); + 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; + } + else + { + entry->summary.runs += summary.ctrs[elt.ctr].runs; + entry->summary.sum_all += summary.ctrs[elt.ctr].sum_all; + if (entry->summary.run_max < summary.ctrs[elt.ctr].run_max) + entry->summary.run_max = summary.ctrs[elt.ctr].run_max; + entry->summary.sum_max += summary.ctrs[elt.ctr].sum_max; + } + 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); + counts_hash.dispose (); + break; + } + } + + gcov_close (); +} + +/* Returns the counters for a particular tag. */ + +gcov_type * +get_coverage_counts (unsigned counter, unsigned expected, + unsigned cfg_checksum, unsigned lineno_checksum, + 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; + + 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_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 = + warning_at (input_location, OPT_Wcoverage_mismatch, + "the control flow of function %qE does not match " + "its profile data (counter %qs)", id, ctr_names[counter]); + if (warning_printed) + { + inform (input_location, "use -Wno-error=coverage-mismatch to tolerate " + "the mismatch but performance may drop if the function is hot"); + + if (!seen_error () + && !warned++) + { + inform (input_location, "coverage mismatch ignored"); + inform (input_location, flag_guess_branch_prob + ? G_("execution counts estimated") + : G_("execution counts assumed to be zero")); + if (!flag_guess_branch_prob) + inform (input_location, + "this can result in poorly optimized code"); + } + } + + 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___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 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 *v1 = NULL; + vec *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 *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 *v1 = NULL; + vec *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); +} + +/* 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, ctor, stmt, init_fn; + 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 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); + + 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 * +coverage_obj_fn (vec *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 *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; + + 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); + } + } +} + +/* 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 *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); + } +} + +#include "gt-coverage.h" -- cgit v1.2.3