/* 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, 2009, 2010
+ 2000, 2001, 2003, 2004, 2005, 2007, 2008, 2009, 2010, 2011, 2012
Free Software Foundation, Inc.
Contributed by James E. Wilson, UC Berkeley/Cygnus Support;
based on some ideas from Dain Samples of UC Berkeley.
#include "diagnostic-core.h"
#include "intl.h"
#include "filenames.h"
+#include "target.h"
#include "gcov-io.h"
#include "gcov-io.c"
-struct function_list
+struct GTY((chain_next ("%h.next"))) coverage_data
{
- struct function_list *next; /* next function */
+ struct coverage_data *next; /* next function */
unsigned ident; /* function ident */
unsigned lineno_checksum; /* function lineno checksum */
unsigned cfg_checksum; /* function cfg checksum */
- unsigned n_ctrs[GCOV_COUNTERS];/* number of counters. */
+ tree fn_decl; /* the function decl */
+ tree ctr_vars[GCOV_COUNTERS]; /* counter variables. */
};
/* Counts information for a function. */
unsigned cfg_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 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. */
-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 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. */
-/* Name of the output file for coverage output file. */
+/* 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 output file for coverage output file. If this is NULL
+ we're not writing to the notes 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 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;
static int htab_counts_entry_eq (const void *, const void *);
static void htab_counts_entry_del (void *);
static void read_counts_file (void);
-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);
+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(constructor_elt,gc) *coverage_obj_fn
+(VEC(constructor_elt,gc) *, tree, struct coverage_data const *);
+static void coverage_obj_finish (VEC(constructor_elt,gc) *);
\f
/* Return the type node for gcov_type. */
read_counts_file (void)
{
gcov_unsigned_t fn_ident = 0;
- counts_entry_t *summaried = NULL;
- unsigned seen_summary = 0;
+ struct gcov_summary summary;
+ unsigned new_summary = 1;
gcov_unsigned_t tag;
int is_error = 0;
unsigned lineno_checksum = 0;
offset = gcov_position ();
if (tag == GCOV_TAG_FUNCTION)
{
- fn_ident = gcov_read_unsigned ();
- lineno_checksum = gcov_read_unsigned ();
- cfg_checksum = gcov_read_unsigned ();
- if (seen_summary)
+ if (length)
{
- /* 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;
+ 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)
{
- counts_entry_t *entry;
- struct gcov_summary summary;
+ struct gcov_summary sum;
+ unsigned ix;
- gcov_read_summary (&summary);
- seen_summary = 1;
- for (entry = summaried; entry; entry = entry->chain)
- {
- struct gcov_ctr_summary *csum = &summary.ctrs[entry->ctr];
+ if (new_summary)
+ memset (&summary, 0, sizeof (summary));
- 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;
+ 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;
}
+ new_summary = 0;
}
else if (GCOV_TAG_IS_COUNTER (tag) && fn_ident)
{
entry->ctr = elt.ctr;
entry->lineno_checksum = lineno_checksum;
entry->cfg_checksum = cfg_checksum;
+ entry->summary = summary.ctrs[elt.ctr];
entry->summary.num = n_counts;
entry->counts = XCNEWVEC (gcov_type, n_counts);
}
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))
+ else
{
- entry->chain = summaried;
- summaried = entry;
+ 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 ();
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 %qE found",
- DECL_ASSEMBLER_NAME (current_function_decl));
- return NULL;
- }
-
+ 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)
{
warning_printed =
warning_at (input_location, OPT_Wcoverage_mismatch,
- "The control flow of function %qE does not match "
+ "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 "
+ inform (input_location, "use -Wno-error=coverage-mismatch to tolerate "
"the mismatch but performance may drop if the function is hot");
if (!seen_error ()
return NULL;
}
- else if (entry->lineno_checksum != lineno_checksum)
- {
- warning (0, "Source location for function %qE have changed,"
- " the profile data may be out of date",
- DECL_ASSEMBLER_NAME (current_function_decl));
- }
+ 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;
if (!num)
return 1;
- if (!tree_ctr_tables[counter])
+ if (!fn_v_ctrs[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 (BUILTINS_LOCATION,
- 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);
+ 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;
}
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 += 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);
+ 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 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];
-
- TREE_ADDRESSABLE (tree_ctr_tables[counter]) = 1;
+ 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,
- tree_ctr_tables[counter],
- build_int_cst (NULL_TREE, no),
+ fn_v_ctrs[counter],
+ build_int_cst (integer_type_node, no),
NULL, NULL));
}
\f
}
\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. */
+ Writes the function header. Returns nonzero if data should be output. */
int
-coverage_begin_output (unsigned lineno_checksum, unsigned cfg_checksum)
+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 || !flag_test_coverage || flag_compare_debug)
+ if (no_coverage || !bbg_file_name)
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;
- }
-
+ 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);
+ /* 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);
- bbg_function_announced = 1;
- }
return !gcov_is_error ();
}
{
unsigned i;
- if (bbg_file_opened > 1 && gcov_is_error ())
+ if (bbg_file_name && gcov_is_error ())
{
warning (0, "error writing %qs", bbg_file_name);
- bbg_file_opened = -1;
+ unlink (bbg_file_name);
+ bbg_file_name = NULL;
}
if (fn_ctr_mask)
{
- struct function_list *item;
-
- item = XNEW (struct function_list);
-
- *functions_tail = item;
- functions_tail = &item->next;
+ 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;
+ }
- item->next = 0;
- item->ident = current_function_funcdef_no + 1;
- item->lineno_checksum = lineno_checksum;
- item->cfg_checksum = cfg_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;
+ 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;
}
- bbg_function_announced = 0;
}
-/* Creates the gcov_fn_info RECORD_TYPE. */
+/* 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_fn_info_type (unsigned int counters)
+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 type = lang_hooks.types.make_type (RECORD_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 */
- fields = build_decl (BUILTINS_LOCATION,
- FIELD_DECL, NULL_TREE, get_gcov_unsigned_t ());
+ 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 ());
+ 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 ());
+ field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE,
+ get_gcov_unsigned_t ());
DECL_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);
+ 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);
+ 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);
-
- 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. */
+/* 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_value (const struct function_list *function, tree type)
+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,gc) *v1 = NULL;
VEC(constructor_elt,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 (),
- function->ident));
+ data->ident));
fields = DECL_CHAIN (fields);
/* lineno_checksum */
CONSTRUCTOR_APPEND_ELT (v1, fields,
build_int_cstu (get_gcov_unsigned_t (),
- function->lineno_checksum));
+ data->lineno_checksum));
fields = DECL_CHAIN (fields);
/* cfg_checksum */
CONSTRUCTOR_APPEND_ELT (v1, fields,
build_int_cstu (get_gcov_unsigned_t (),
- function->cfg_checksum));
+ 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))
- CONSTRUCTOR_APPEND_ELT (v2, NULL,
- build_int_cstu (get_gcov_unsigned_t (),
- function->n_ctrs[ix]));
-
+ {
+ VEC(constructor_elt,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);
}
-/* Creates the gcov_ctr_info RECORD_TYPE. */
+/* 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 tree
-build_ctr_info_type (void)
+static void
+build_info_type (tree type, tree fn_info_ptr_type)
{
- 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;
+ tree merge_fn_type;
- /* counters */
- field = build_decl (BUILTINS_LOCATION,
- FIELD_DECL, NULL_TREE, get_gcov_unsigned_t ());
+ /* Version ident */
+ field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE,
+ get_gcov_unsigned_t ());
DECL_CHAIN (field) = fields;
fields = field;
- /* values */
- field = build_decl (BUILTINS_LOCATION,
- FIELD_DECL, NULL_TREE, gcov_ptr_type);
+ /* 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;
- /* merge */
- gcov_merge_fn_type =
- build_function_type_list (void_type_node,
- gcov_ptr_type, get_gcov_unsigned_t (),
- NULL_TREE);
- field = build_decl (BUILTINS_LOCATION,
- FIELD_DECL, NULL_TREE,
- build_pointer_type (gcov_merge_fn_type));
+ /* stamp */
+ field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE,
+ get_gcov_unsigned_t ());
DECL_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 fields = TYPE_FIELDS (type);
- tree fn;
- VEC(constructor_elt,gc) *v = NULL;
-
- /* counters */
- CONSTRUCTOR_APPEND_ELT (v, fields,
- build_int_cstu (get_gcov_unsigned_t (),
- prg_n_ctrs[counter]));
- fields = DECL_CHAIN (fields);
+ /* 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;
- 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);
- varpool_finalize_decl (tree_ctr_tables[counter]);
-
- CONSTRUCTOR_APPEND_ELT (v, fields,
- build1 (ADDR_EXPR, TREE_TYPE (fields),
- tree_ctr_tables[counter]));
- }
- else
- CONSTRUCTOR_APPEND_ELT (v, fields, null_pointer_node);
- fields = DECL_CHAIN (fields);
+ /* 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;
- fn = build_decl (BUILTINS_LOCATION,
- 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;
- DECL_ASSEMBLER_NAME (fn); /* Initialize assembler name so we can stream out. */
- CONSTRUCTOR_APPEND_ELT (v, fields, build1 (ADDR_EXPR, TREE_TYPE (fields), fn));
-
- return build_constructor (type, v);
+ finish_builtin_struct (type, "__gcov_info", fields, NULL_TREE);
}
-/* Creates the gcov_info RECORD_TYPE and initializer for it. Returns a
- CONSTRUCTOR. */
+/* 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_gcov_info (void)
+build_info (tree info_type, tree fn_ary)
{
- 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 info_fields = TYPE_FIELDS (info_type);
+ tree merge_fn_type, n_funcs;
+ unsigned ix;
tree filename_string;
int da_file_name_len;
- unsigned n_fns;
- const struct function_list *fn;
- tree string_type;
VEC(constructor_elt,gc) *v1 = NULL;
VEC(constructor_elt,gc) *v2 = NULL;
- /* 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 (BUILTINS_LOCATION,
- FIELD_DECL, NULL_TREE, get_gcov_unsigned_t ());
- DECL_CHAIN (field) = fields;
- fields = field;
- CONSTRUCTOR_APPEND_ELT (v1, field,
- build_int_cstu (TREE_TYPE (field), GCOV_VERSION));
+ CONSTRUCTOR_APPEND_ELT (v1, info_fields,
+ build_int_cstu (TREE_TYPE (info_fields),
+ GCOV_VERSION));
+ info_fields = DECL_CHAIN (info_fields);
/* next -- NULL */
- field = build_decl (BUILTINS_LOCATION,
- FIELD_DECL, NULL_TREE, build_pointer_type (const_type));
- DECL_CHAIN (field) = fields;
- fields = field;
- CONSTRUCTOR_APPEND_ELT (v1, field, null_pointer_node);
-
+ CONSTRUCTOR_APPEND_ELT (v1, info_fields, null_pointer_node);
+ info_fields = DECL_CHAIN (info_fields);
+
/* stamp */
- field = build_decl (BUILTINS_LOCATION,
- FIELD_DECL, NULL_TREE, get_gcov_unsigned_t ());
- DECL_CHAIN (field) = fields;
- fields = field;
- CONSTRUCTOR_APPEND_ELT (v1, field,
- build_int_cstu (TREE_TYPE (field), local_tick));
+ CONSTRUCTOR_APPEND_ELT (v1, info_fields,
+ build_int_cstu (TREE_TYPE (info_fields),
+ local_tick));
+ info_fields = DECL_CHAIN (info_fields);
/* Filename */
- string_type = build_pointer_type (build_qualified_type (char_type_node,
- TYPE_QUAL_CONST));
- field = build_decl (BUILTINS_LOCATION,
- FIELD_DECL, NULL_TREE, string_type);
- DECL_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)));
- CONSTRUCTOR_APPEND_ELT (v1, field,
- build1 (ADDR_EXPR, string_type, filename_string));
-
- /* 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++)
- CONSTRUCTOR_APPEND_ELT (v2, NULL_TREE,
- build_fn_info_value (fn, fn_info_type));
-
- if (n_fns)
+ (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 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);
+ tree ptr = null_pointer_node;
- fn_info_value = build_constructor (array_type, v2);
- fn_info_value = build1 (ADDR_EXPR, fn_info_ptr_type, fn_info_value);
+ 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);
}
- else
- fn_info_value = null_pointer_node;
-
- /* number of functions */
- field = build_decl (BUILTINS_LOCATION,
- FIELD_DECL, NULL_TREE, get_gcov_unsigned_t ());
- DECL_CHAIN (field) = fields;
- fields = field;
- CONSTRUCTOR_APPEND_ELT (v1, field,
- build_int_cstu (get_gcov_unsigned_t (), n_fns));
-
- /* fn_info table */
- field = build_decl (BUILTINS_LOCATION,
- FIELD_DECL, NULL_TREE, fn_info_ptr_type);
- DECL_CHAIN (field) = fields;
- fields = field;
- CONSTRUCTOR_APPEND_ELT (v1, field, fn_info_value);
-
- /* counter_mask */
- field = build_decl (BUILTINS_LOCATION,
- FIELD_DECL, NULL_TREE, get_gcov_unsigned_t ());
- DECL_CHAIN (field) = fields;
- fields = field;
- CONSTRUCTOR_APPEND_ELT (v1, field,
- build_int_cstu (get_gcov_unsigned_t (),
- prg_ctr_mask));
-
- /* 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);
- v2 = NULL;
- for (ix = 0; ix != GCOV_COUNTERS; ix++)
- if (prg_ctr_mask & (1 << ix))
- CONSTRUCTOR_APPEND_ELT (v2, NULL_TREE,
- build_ctr_info_value (ix, ctr_info_type));
- ctr_info_value = build_constructor (ctr_info_ary_type, v2);
-
- field = build_decl (BUILTINS_LOCATION,
- FIELD_DECL, NULL_TREE, ctr_info_ary_type);
- DECL_CHAIN (field) = fields;
- fields = field;
- CONSTRUCTOR_APPEND_ELT (v1, field, ctr_info_value);
-
- finish_builtin_struct (type, "__gcov_info", fields, NULL_TREE);
-
- return build_constructor (type, v1);
+ 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);
}
-/* 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. */
+/* 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 void
-create_coverage (void)
+static bool
+coverage_obj_init (void)
{
- tree gcov_info, gcov_init, body, t;
+ 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;
+ return false;
- t = build_gcov_info ();
+ if (cgraph_dump_file)
+ fprintf (cgraph_dump_file, "Using data file %s\n", da_file_name);
- gcov_info = build_decl (BUILTINS_LOCATION,
- 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;
+ /* 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;
- /* Build structure. */
- varpool_finalize_decl (gcov_info);
+ 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. */
- t = build_pointer_type (TREE_TYPE (gcov_info));
- t = build_function_type_list (void_type_node, t, NULL);
- t = build_decl (BUILTINS_LOCATION,
- FUNCTION_DECL, get_identifier ("__gcov_init"), t);
- TREE_PUBLIC (t) = 1;
- DECL_EXTERNAL (t) = 1;
- DECL_ASSEMBLER_NAME (t); /* Initialize assembler name so we can stream out. */
- gcov_init = t;
+ 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). */
- body = NULL;
- t = build_fold_addr_expr (gcov_info);
- t = build_call_expr (gcov_init, 1, t);
- append_to_statement_list (t, &body);
+ 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', body, DEFAULT_INIT_PRIORITY);
+ cgraph_build_static_cdtor ('I', ctor, DEFAULT_INIT_PRIORITY);
+
+ return true;
}
-\f
+
+/* 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,gc) *
+coverage_obj_fn (VEC(constructor_elt,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,gc) *ctor)
+{
+ unsigned n_functions = VEC_length(constructor_elt, 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 graph file. */
coverage_init (const char *filename)
{
int len = strlen (filename);
- /* + 1 for extra '/', in case prefix doesn't end with /. */
- int prefix_len;
+ int prefix_len = 0;
- if (profile_data_prefix == 0 && !IS_ABSOLUTE_PATH(&filename[0]))
+ if (!profile_data_prefix && !IS_ABSOLUTE_PATH (filename))
profile_data_prefix = getpwd ();
- prefix_len = (profile_data_prefix) ? strlen (profile_data_prefix) + 1 : 0;
+ 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 + 1);
+ + prefix_len + 2);
if (profile_data_prefix)
{
- strcpy (da_file_name, profile_data_prefix);
- da_file_name[prefix_len - 1] = '/';
- da_file_name[prefix_len] = 0;
+ memcpy (da_file_name, profile_data_prefix, prefix_len);
+ da_file_name[prefix_len++] = '/';
}
- else
- da_file_name[0] = 0;
- strcat (da_file_name, filename);
- strcat (da_file_name, GCOV_DATA_SUFFIX);
+ memcpy (da_file_name + prefix_len, filename, len);
+ strcpy (da_file_name + prefix_len + len, 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_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 (local_tick);
+ }
+ }
- if (flag_profile_use)
+ if (flag_branch_probabilities)
read_counts_file ();
}
void
coverage_finish (void)
{
- create_coverage ();
- if (bbg_file_opened)
+ if (bbg_file_name && gcov_close ())
+ unlink (bbg_file_name);
+
+ if (!local_tick || local_tick == (unsigned)-1)
+ /* Only remove the da file, if we cannot stamp it. If we can
+ stamp it, libgcov will DTRT. */
+ unlink (da_file_name);
+
+ if (coverage_obj_init ())
{
- 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);
+ VEC(constructor_elt,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);
}
}