0,0 → 1,1408 |
/* Utility functions for reading gcda files into in-memory |
gcov_info structures and offline profile processing. */ |
/* Copyright (C) 2014-2015 Free Software Foundation, Inc. |
Contributed by Rong Xu <xur@google.com>. |
|
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. |
|
Under Section 7 of GPL version 3, you are granted additional |
permissions described in the GCC Runtime Library Exception, version |
3.1, as published by the Free Software Foundation. |
|
You should have received a copy of the GNU General Public License and |
a copy of the GCC Runtime Library Exception along with this program; |
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see |
<http://www.gnu.org/licenses/>. */ |
|
|
#define IN_GCOV_TOOL 1 |
|
#include "libgcov.h" |
#include "intl.h" |
#include "diagnostic.h" |
#include "version.h" |
#include "demangle.h" |
|
/* Borrowed from basic-block.h. */ |
#define RDIV(X,Y) (((X) + (Y) / 2) / (Y)) |
|
extern gcov_position_t gcov_position(); |
extern int gcov_is_error(); |
|
/* Verbose mode for debug. */ |
static int verbose; |
|
/* Set verbose flag. */ |
void gcov_set_verbose (void) |
{ |
verbose = 1; |
} |
|
/* The following part is to read Gcda and reconstruct GCOV_INFO. */ |
|
#include "obstack.h" |
#include <unistd.h> |
#ifdef HAVE_FTW_H |
#include <ftw.h> |
#endif |
|
static void tag_function (unsigned, unsigned); |
static void tag_blocks (unsigned, unsigned); |
static void tag_arcs (unsigned, unsigned); |
static void tag_lines (unsigned, unsigned); |
static void tag_counters (unsigned, unsigned); |
static void tag_summary (unsigned, unsigned); |
|
/* The gcov_info for the first module. */ |
static struct gcov_info *curr_gcov_info; |
/* The gcov_info being processed. */ |
static struct gcov_info *gcov_info_head; |
/* This variable contains all the functions in current module. */ |
static struct obstack fn_info; |
/* The function being processed. */ |
static struct gcov_fn_info *curr_fn_info; |
/* The number of functions seen so far. */ |
static unsigned num_fn_info; |
/* This variable contains all the counters for current module. */ |
static int k_ctrs_mask[GCOV_COUNTERS]; |
/* The kind of counters that have been seen. */ |
static struct gcov_ctr_info k_ctrs[GCOV_COUNTERS]; |
/* Number of kind of counters that have been seen. */ |
static int k_ctrs_types; |
|
/* Merge functions for counters. */ |
#define DEF_GCOV_COUNTER(COUNTER, NAME, FN_TYPE) __gcov_merge ## FN_TYPE, |
static gcov_merge_fn ctr_merge_functions[GCOV_COUNTERS] = { |
#include "gcov-counter.def" |
}; |
#undef DEF_GCOV_COUNTER |
|
/* Set the ctrs field in gcov_fn_info object FN_INFO. */ |
|
static void |
set_fn_ctrs (struct gcov_fn_info *fn_info) |
{ |
int j = 0, i; |
|
for (i = 0; i < GCOV_COUNTERS; i++) |
{ |
if (k_ctrs_mask[i] == 0) |
continue; |
fn_info->ctrs[j].num = k_ctrs[i].num; |
fn_info->ctrs[j].values = k_ctrs[i].values; |
j++; |
} |
if (k_ctrs_types == 0) |
k_ctrs_types = j; |
else |
gcc_assert (j == k_ctrs_types); |
} |
|
/* For each tag in gcda file, we have an entry here. |
TAG is the tag value; NAME is the tag name; and |
PROC is the handler function. */ |
|
typedef struct tag_format |
{ |
unsigned tag; |
char const *name; |
void (*proc) (unsigned, unsigned); |
} tag_format_t; |
|
/* Handler table for various Tags. */ |
|
static const tag_format_t tag_table[] = |
{ |
{0, "NOP", NULL}, |
{0, "UNKNOWN", NULL}, |
{0, "COUNTERS", tag_counters}, |
{GCOV_TAG_FUNCTION, "FUNCTION", tag_function}, |
{GCOV_TAG_BLOCKS, "BLOCKS", tag_blocks}, |
{GCOV_TAG_ARCS, "ARCS", tag_arcs}, |
{GCOV_TAG_LINES, "LINES", tag_lines}, |
{GCOV_TAG_OBJECT_SUMMARY, "OBJECT_SUMMARY", tag_summary}, |
{GCOV_TAG_PROGRAM_SUMMARY, "PROGRAM_SUMMARY", tag_summary}, |
{0, NULL, NULL} |
}; |
|
/* Handler for reading function tag. */ |
|
static void |
tag_function (unsigned tag ATTRIBUTE_UNUSED, unsigned length ATTRIBUTE_UNUSED) |
{ |
int i; |
|
/* write out previous fn_info. */ |
if (num_fn_info) |
{ |
set_fn_ctrs (curr_fn_info); |
obstack_ptr_grow (&fn_info, curr_fn_info); |
} |
|
/* Here we over allocate a bit, using GCOV_COUNTERS instead of the actual active |
counter types. */ |
curr_fn_info = (struct gcov_fn_info *) xcalloc (sizeof (struct gcov_fn_info) |
+ GCOV_COUNTERS * sizeof (struct gcov_ctr_info), 1); |
|
for (i = 0; i < GCOV_COUNTERS; i++) |
k_ctrs[i].num = 0; |
k_ctrs_types = 0; |
|
curr_fn_info->key = curr_gcov_info; |
curr_fn_info->ident = gcov_read_unsigned (); |
curr_fn_info->lineno_checksum = gcov_read_unsigned (); |
curr_fn_info->cfg_checksum = gcov_read_unsigned (); |
num_fn_info++; |
|
if (verbose) |
fnotice (stdout, "tag one function id=%d\n", curr_fn_info->ident); |
} |
|
/* Handler for reading block tag. */ |
|
static void |
tag_blocks (unsigned tag ATTRIBUTE_UNUSED, unsigned length ATTRIBUTE_UNUSED) |
{ |
/* TBD: gcov-tool currently does not handle gcno files. Assert here. */ |
gcc_unreachable (); |
} |
|
/* Handler for reading flow arc tag. */ |
|
static void |
tag_arcs (unsigned tag ATTRIBUTE_UNUSED, unsigned length ATTRIBUTE_UNUSED) |
{ |
/* TBD: gcov-tool currently does not handle gcno files. Assert here. */ |
gcc_unreachable (); |
} |
|
/* Handler for reading line tag. */ |
|
static void |
tag_lines (unsigned tag ATTRIBUTE_UNUSED, unsigned length ATTRIBUTE_UNUSED) |
{ |
/* TBD: gcov-tool currently does not handle gcno files. Assert here. */ |
gcc_unreachable (); |
} |
|
/* Handler for reading counters array tag with value as TAG and length of LENGTH. */ |
|
static void |
tag_counters (unsigned tag, unsigned length) |
{ |
unsigned n_counts = GCOV_TAG_COUNTER_NUM (length); |
gcov_type *values; |
unsigned ix; |
unsigned tag_ix; |
|
tag_ix = GCOV_COUNTER_FOR_TAG (tag); |
gcc_assert (tag_ix < GCOV_COUNTERS); |
k_ctrs_mask [tag_ix] = 1; |
gcc_assert (k_ctrs[tag_ix].num == 0); |
k_ctrs[tag_ix].num = n_counts; |
|
k_ctrs[tag_ix].values = values = (gcov_type *) xmalloc (n_counts * sizeof (gcov_type)); |
gcc_assert (values); |
|
for (ix = 0; ix != n_counts; ix++) |
values[ix] = gcov_read_counter (); |
} |
|
/* Handler for reading summary tag. */ |
|
static void |
tag_summary (unsigned tag ATTRIBUTE_UNUSED, unsigned length ATTRIBUTE_UNUSED) |
{ |
struct gcov_summary summary; |
|
gcov_read_summary (&summary); |
} |
|
/* This function is called at the end of reading a gcda file. |
It flushes the contents in curr_fn_info to gcov_info object OBJ_INFO. */ |
|
static void |
read_gcda_finalize (struct gcov_info *obj_info) |
{ |
int i; |
|
set_fn_ctrs (curr_fn_info); |
obstack_ptr_grow (&fn_info, curr_fn_info); |
|
/* We set the following fields: merge, n_functions, and functions. */ |
obj_info->n_functions = num_fn_info; |
obj_info->functions = (const struct gcov_fn_info**) obstack_finish (&fn_info); |
|
/* wrap all the counter array. */ |
for (i=0; i< GCOV_COUNTERS; i++) |
{ |
if (k_ctrs_mask[i]) |
obj_info->merge[i] = ctr_merge_functions[i]; |
} |
} |
|
/* Read the content of a gcda file FILENAME, and return a gcov_info data structure. |
Program level summary CURRENT_SUMMARY will also be updated. */ |
|
static struct gcov_info * |
read_gcda_file (const char *filename) |
{ |
unsigned tags[4]; |
unsigned depth = 0; |
unsigned magic, version; |
struct gcov_info *obj_info; |
int i; |
|
for (i=0; i< GCOV_COUNTERS; i++) |
k_ctrs_mask[i] = 0; |
k_ctrs_types = 0; |
|
if (!gcov_open (filename)) |
{ |
fnotice (stderr, "%s:cannot open\n", filename); |
return NULL; |
} |
|
/* Read magic. */ |
magic = gcov_read_unsigned (); |
if (magic != GCOV_DATA_MAGIC) |
{ |
fnotice (stderr, "%s:not a gcov data file\n", filename); |
gcov_close (); |
return NULL; |
} |
|
/* Read version. */ |
version = gcov_read_unsigned (); |
if (version != GCOV_VERSION) |
{ |
fnotice (stderr, "%s:incorrect gcov version %d vs %d \n", filename, version, GCOV_VERSION); |
gcov_close (); |
return NULL; |
} |
|
/* Instantiate a gcov_info object. */ |
curr_gcov_info = obj_info = (struct gcov_info *) xcalloc (sizeof (struct gcov_info) + |
sizeof (struct gcov_ctr_info) * GCOV_COUNTERS, 1); |
|
obj_info->version = version; |
obstack_init (&fn_info); |
num_fn_info = 0; |
curr_fn_info = 0; |
{ |
size_t len = strlen (filename) + 1; |
char *str_dup = (char*) xmalloc (len); |
|
memcpy (str_dup, filename, len); |
obj_info->filename = str_dup; |
} |
|
/* Read stamp. */ |
obj_info->stamp = gcov_read_unsigned (); |
|
while (1) |
{ |
gcov_position_t base; |
unsigned tag, length; |
tag_format_t const *format; |
unsigned tag_depth; |
int error; |
unsigned mask; |
|
tag = gcov_read_unsigned (); |
if (!tag) |
break; |
length = gcov_read_unsigned (); |
base = gcov_position (); |
mask = GCOV_TAG_MASK (tag) >> 1; |
for (tag_depth = 4; mask; mask >>= 8) |
{ |
if (((mask & 0xff) != 0xff)) |
{ |
warning (0, "%s:tag `%x' is invalid\n", filename, tag); |
break; |
} |
tag_depth--; |
} |
for (format = tag_table; format->name; format++) |
if (format->tag == tag) |
goto found; |
format = &tag_table[GCOV_TAG_IS_COUNTER (tag) ? 2 : 1]; |
found:; |
if (tag) |
{ |
if (depth && depth < tag_depth) |
{ |
if (!GCOV_TAG_IS_SUBTAG (tags[depth - 1], tag)) |
warning (0, "%s:tag `%x' is incorrectly nested\n", |
filename, tag); |
} |
depth = tag_depth; |
tags[depth - 1] = tag; |
} |
|
if (format->proc) |
{ |
unsigned long actual_length; |
|
(*format->proc) (tag, length); |
|
actual_length = gcov_position () - base; |
if (actual_length > length) |
warning (0, "%s:record size mismatch %lu bytes overread\n", |
filename, actual_length - length); |
else if (length > actual_length) |
warning (0, "%s:record size mismatch %lu bytes unread\n", |
filename, length - actual_length); |
} |
|
gcov_sync (base, length); |
if ((error = gcov_is_error ())) |
{ |
warning (0, error < 0 ? "%s:counter overflow at %lu\n" : |
"%s:read error at %lu\n", filename, |
(long unsigned) gcov_position ()); |
break; |
} |
} |
|
read_gcda_finalize (obj_info); |
gcov_close (); |
|
return obj_info; |
} |
|
#ifdef HAVE_FTW_H |
/* This will be called by ftw(). It opens and read a gcda file FILENAME. |
Return a non-zero value to stop the tree walk. */ |
|
static int |
ftw_read_file (const char *filename, |
const struct stat *status ATTRIBUTE_UNUSED, |
int type) |
{ |
int filename_len; |
int suffix_len; |
struct gcov_info *obj_info; |
|
/* Only read regular files. */ |
if (type != FTW_F) |
return 0; |
|
filename_len = strlen (filename); |
suffix_len = strlen (GCOV_DATA_SUFFIX); |
|
if (filename_len <= suffix_len) |
return 0; |
|
if (strcmp(filename + filename_len - suffix_len, GCOV_DATA_SUFFIX)) |
return 0; |
|
if (verbose) |
fnotice (stderr, "reading file: %s\n", filename); |
|
obj_info = read_gcda_file (filename); |
if (!obj_info) |
return 0; |
|
obj_info->next = gcov_info_head; |
gcov_info_head = obj_info; |
|
return 0; |
} |
#endif |
|
/* Initializer for reading a profile dir. */ |
|
static inline void |
read_profile_dir_init (void) |
{ |
gcov_info_head = 0; |
} |
|
/* Driver for read a profile directory and convert into gcov_info list in memory. |
Return NULL on error, |
Return the head of gcov_info list on success. */ |
|
struct gcov_info * |
gcov_read_profile_dir (const char* dir_name, int recompute_summary ATTRIBUTE_UNUSED) |
{ |
char *pwd; |
int ret; |
|
read_profile_dir_init (); |
|
if (access (dir_name, R_OK) != 0) |
{ |
fnotice (stderr, "cannot access directory %s\n", dir_name); |
return NULL; |
} |
pwd = getcwd (NULL, 0); |
gcc_assert (pwd); |
ret = chdir (dir_name); |
if (ret !=0) |
{ |
fnotice (stderr, "%s is not a directory\n", dir_name); |
return NULL; |
} |
#ifdef HAVE_FTW_H |
ftw (".", ftw_read_file, 50); |
#endif |
ret = chdir (pwd); |
free (pwd); |
|
|
return gcov_info_head;; |
} |
|
/* This part of the code is to merge profile counters. These |
variables are set in merge_wrapper and to be used by |
global function gcov_read_counter_mem() and gcov_get_merge_weight. */ |
|
/* We save the counter value address to this variable. */ |
static gcov_type *gcov_value_buf; |
|
/* The number of counter values to be read by current merging. */ |
static gcov_unsigned_t gcov_value_buf_size; |
|
/* The index of counter values being read. */ |
static gcov_unsigned_t gcov_value_buf_pos; |
|
/* The weight of current merging. */ |
static unsigned gcov_merge_weight; |
|
/* Read a counter value from gcov_value_buf array. */ |
|
gcov_type |
gcov_read_counter_mem (void) |
{ |
gcov_type ret; |
gcc_assert (gcov_value_buf_pos < gcov_value_buf_size); |
ret = *(gcov_value_buf + gcov_value_buf_pos); |
++gcov_value_buf_pos; |
return ret; |
} |
|
/* Return the recorded merge weight. */ |
|
unsigned |
gcov_get_merge_weight (void) |
{ |
return gcov_merge_weight; |
} |
|
/* A wrapper function for merge functions. It sets up the |
value buffer and weights and then calls the merge function. */ |
|
static void |
merge_wrapper (gcov_merge_fn f, gcov_type *v1, gcov_unsigned_t n, |
gcov_type *v2, unsigned w) |
{ |
gcov_value_buf = v2; |
gcov_value_buf_pos = 0; |
gcov_value_buf_size = n; |
gcov_merge_weight = w; |
(*f) (v1, n); |
} |
|
/* Offline tool to manipulate profile data. |
This tool targets on matched profiles. But it has some tolerance on |
unmatched profiles. |
When merging p1 to p2 (p2 is the dst), |
* m.gcda in p1 but not in p2: append m.gcda to p2 with specified weight; |
emit warning |
* m.gcda in p2 but not in p1: keep m.gcda in p2 and multiply by |
specified weight; emit warning. |
* m.gcda in both p1 and p2: |
** p1->m.gcda->f checksum matches p2->m.gcda->f: simple merge. |
** p1->m.gcda->f checksum does not matches p2->m.gcda->f: keep |
p2->m.gcda->f and |
drop p1->m.gcda->f. A warning is emitted. */ |
|
/* Add INFO2's counter to INFO1, multiplying by weight W. */ |
|
static int |
gcov_merge (struct gcov_info *info1, struct gcov_info *info2, int w) |
{ |
unsigned f_ix; |
unsigned n_functions = info1->n_functions; |
int has_mismatch = 0; |
|
gcc_assert (info2->n_functions == n_functions); |
for (f_ix = 0; f_ix < n_functions; f_ix++) |
{ |
unsigned t_ix; |
const struct gcov_fn_info *gfi_ptr1 = info1->functions[f_ix]; |
const struct gcov_fn_info *gfi_ptr2 = info2->functions[f_ix]; |
const struct gcov_ctr_info *ci_ptr1, *ci_ptr2; |
|
if (!gfi_ptr1 || gfi_ptr1->key != info1) |
continue; |
if (!gfi_ptr2 || gfi_ptr2->key != info2) |
continue; |
|
if (gfi_ptr1->cfg_checksum != gfi_ptr2->cfg_checksum) |
{ |
fnotice (stderr, "in %s, cfg_checksum mismatch, skipping\n", |
info1->filename); |
has_mismatch = 1; |
continue; |
} |
ci_ptr1 = gfi_ptr1->ctrs; |
ci_ptr2 = gfi_ptr2->ctrs; |
for (t_ix = 0; t_ix != GCOV_COUNTERS; t_ix++) |
{ |
gcov_merge_fn merge1 = info1->merge[t_ix]; |
gcov_merge_fn merge2 = info2->merge[t_ix]; |
|
gcc_assert (merge1 == merge2); |
if (!merge1) |
continue; |
gcc_assert (ci_ptr1->num == ci_ptr2->num); |
merge_wrapper (merge1, ci_ptr1->values, ci_ptr1->num, ci_ptr2->values, w); |
ci_ptr1++; |
ci_ptr2++; |
} |
} |
|
return has_mismatch; |
} |
|
/* Find and return the match gcov_info object for INFO from ARRAY. |
SIZE is the length of ARRAY. |
Return NULL if there is no match. */ |
|
static struct gcov_info * |
find_match_gcov_info (struct gcov_info **array, int size, |
struct gcov_info *info) |
{ |
struct gcov_info *gi_ptr; |
struct gcov_info *ret = NULL; |
int i; |
|
for (i = 0; i < size; i++) |
{ |
gi_ptr = array[i]; |
if (gi_ptr == 0) |
continue; |
if (!strcmp (gi_ptr->filename, info->filename)) |
{ |
ret = gi_ptr; |
array[i] = 0; |
break; |
} |
} |
|
if (ret && ret->n_functions != info->n_functions) |
{ |
fnotice (stderr, "mismatched profiles in %s (%d functions" |
" vs %d functions)\n", |
ret->filename, |
ret->n_functions, |
info->n_functions); |
ret = NULL; |
} |
return ret; |
} |
|
/* Merge the list of gcov_info objects from SRC_PROFILE to TGT_PROFILE. |
Return 0 on success: without mismatch. |
Reutrn 1 on error. */ |
|
int |
gcov_profile_merge (struct gcov_info *tgt_profile, struct gcov_info *src_profile, |
int w1, int w2) |
{ |
struct gcov_info *gi_ptr; |
struct gcov_info **tgt_infos; |
struct gcov_info *tgt_tail; |
struct gcov_info **in_src_not_tgt; |
unsigned tgt_cnt = 0, src_cnt = 0; |
unsigned unmatch_info_cnt = 0; |
unsigned int i; |
|
for (gi_ptr = tgt_profile; gi_ptr; gi_ptr = gi_ptr->next) |
tgt_cnt++; |
for (gi_ptr = src_profile; gi_ptr; gi_ptr = gi_ptr->next) |
src_cnt++; |
tgt_infos = (struct gcov_info **) xmalloc (sizeof (struct gcov_info *) |
* tgt_cnt); |
gcc_assert (tgt_infos); |
in_src_not_tgt = (struct gcov_info **) xmalloc (sizeof (struct gcov_info *) |
* src_cnt); |
gcc_assert (in_src_not_tgt); |
|
for (gi_ptr = tgt_profile, i = 0; gi_ptr; gi_ptr = gi_ptr->next, i++) |
tgt_infos[i] = gi_ptr; |
|
tgt_tail = tgt_infos[tgt_cnt - 1]; |
|
/* First pass on tgt_profile, we multiply w1 to all counters. */ |
if (w1 > 1) |
{ |
for (i = 0; i < tgt_cnt; i++) |
gcov_merge (tgt_infos[i], tgt_infos[i], w1-1); |
} |
|
/* Second pass, add src_profile to the tgt_profile. */ |
for (gi_ptr = src_profile; gi_ptr; gi_ptr = gi_ptr->next) |
{ |
struct gcov_info *gi_ptr1; |
|
gi_ptr1 = find_match_gcov_info (tgt_infos, tgt_cnt, gi_ptr); |
if (gi_ptr1 == NULL) |
{ |
in_src_not_tgt[unmatch_info_cnt++] = gi_ptr; |
continue; |
} |
gcov_merge (gi_ptr1, gi_ptr, w2); |
} |
|
/* For modules in src but not in tgt. We adjust the counter and append. */ |
for (i = 0; i < unmatch_info_cnt; i++) |
{ |
gi_ptr = in_src_not_tgt[i]; |
gcov_merge (gi_ptr, gi_ptr, w2 - 1); |
tgt_tail->next = gi_ptr; |
tgt_tail = gi_ptr; |
} |
|
return 0; |
} |
|
typedef gcov_type (*counter_op_fn) (gcov_type, void*, void*); |
|
/* Performing FN upon arc counters. */ |
|
static void |
__gcov_add_counter_op (gcov_type *counters, unsigned n_counters, |
counter_op_fn fn, void *data1, void *data2) |
{ |
for (; n_counters; counters++, n_counters--) |
{ |
gcov_type val = *counters; |
*counters = fn(val, data1, data2); |
} |
} |
|
/* Performing FN upon ior counters. */ |
|
static void |
__gcov_ior_counter_op (gcov_type *counters ATTRIBUTE_UNUSED, |
unsigned n_counters ATTRIBUTE_UNUSED, |
counter_op_fn fn ATTRIBUTE_UNUSED, |
void *data1 ATTRIBUTE_UNUSED, |
void *data2 ATTRIBUTE_UNUSED) |
{ |
/* Do nothing. */ |
} |
|
/* Performing FN upon time-profile counters. */ |
|
static void |
__gcov_time_profile_counter_op (gcov_type *counters ATTRIBUTE_UNUSED, |
unsigned n_counters ATTRIBUTE_UNUSED, |
counter_op_fn fn ATTRIBUTE_UNUSED, |
void *data1 ATTRIBUTE_UNUSED, |
void *data2 ATTRIBUTE_UNUSED) |
{ |
/* Do nothing. */ |
} |
|
/* Performaing FN upon delta counters. */ |
|
static void |
__gcov_delta_counter_op (gcov_type *counters, unsigned n_counters, |
counter_op_fn fn, void *data1, void *data2) |
{ |
unsigned i, n_measures; |
|
gcc_assert (!(n_counters % 4)); |
n_measures = n_counters / 4; |
for (i = 0; i < n_measures; i++, counters += 4) |
{ |
counters[2] = fn (counters[2], data1, data2); |
counters[3] = fn (counters[3], data1, data2); |
} |
} |
|
/* Performing FN upon single counters. */ |
|
static void |
__gcov_single_counter_op (gcov_type *counters, unsigned n_counters, |
counter_op_fn fn, void *data1, void *data2) |
{ |
unsigned i, n_measures; |
|
gcc_assert (!(n_counters % 3)); |
n_measures = n_counters / 3; |
for (i = 0; i < n_measures; i++, counters += 3) |
{ |
counters[1] = fn (counters[1], data1, data2); |
counters[2] = fn (counters[2], data1, data2); |
} |
} |
|
/* Performing FN upon indirect-call profile counters. */ |
|
static void |
__gcov_icall_topn_counter_op (gcov_type *counters, unsigned n_counters, |
counter_op_fn fn, void *data1, void *data2) |
{ |
unsigned i; |
|
gcc_assert (!(n_counters % GCOV_ICALL_TOPN_NCOUNTS)); |
for (i = 0; i < n_counters; i += GCOV_ICALL_TOPN_NCOUNTS) |
{ |
unsigned j; |
gcov_type *value_array = &counters[i + 1]; |
|
for (j = 0; j < GCOV_ICALL_TOPN_NCOUNTS - 1; j += 2) |
value_array[j + 1] = fn (value_array[j + 1], data1, data2); |
} |
} |
|
/* Scaling the counter value V by multiplying *(float*) DATA1. */ |
|
static gcov_type |
fp_scale (gcov_type v, void *data1, void *data2 ATTRIBUTE_UNUSED) |
{ |
float f = *(float *) data1; |
return (gcov_type) (v * f); |
} |
|
/* Scaling the counter value V by multiplying DATA2/DATA1. */ |
|
static gcov_type |
int_scale (gcov_type v, void *data1, void *data2) |
{ |
int n = *(int *) data1; |
int d = *(int *) data2; |
return (gcov_type) ( RDIV (v,d) * n); |
} |
|
/* Type of function used to process counters. */ |
typedef void (*gcov_counter_fn) (gcov_type *, gcov_unsigned_t, |
counter_op_fn, void *, void *); |
|
/* Function array to process profile counters. */ |
#define DEF_GCOV_COUNTER(COUNTER, NAME, FN_TYPE) \ |
__gcov ## FN_TYPE ## _counter_op, |
static gcov_counter_fn ctr_functions[GCOV_COUNTERS] = { |
#include "gcov-counter.def" |
}; |
#undef DEF_GCOV_COUNTER |
|
/* Driver for scaling profile counters. */ |
|
int |
gcov_profile_scale (struct gcov_info *profile, float scale_factor, int n, int d) |
{ |
struct gcov_info *gi_ptr; |
unsigned f_ix; |
|
if (verbose) |
fnotice (stdout, "scale_factor is %f or %d/%d\n", scale_factor, n, d); |
|
/* Scaling the counters. */ |
for (gi_ptr = profile; gi_ptr; gi_ptr = gi_ptr->next) |
for (f_ix = 0; f_ix < gi_ptr->n_functions; f_ix++) |
{ |
unsigned t_ix; |
const struct gcov_fn_info *gfi_ptr = gi_ptr->functions[f_ix]; |
const struct gcov_ctr_info *ci_ptr; |
|
if (!gfi_ptr || gfi_ptr->key != gi_ptr) |
continue; |
|
ci_ptr = gfi_ptr->ctrs; |
for (t_ix = 0; t_ix != GCOV_COUNTERS; t_ix++) |
{ |
gcov_merge_fn merge = gi_ptr->merge[t_ix]; |
|
if (!merge) |
continue; |
if (d == 0) |
(*ctr_functions[t_ix]) (ci_ptr->values, ci_ptr->num, |
fp_scale, &scale_factor, NULL); |
else |
(*ctr_functions[t_ix]) (ci_ptr->values, ci_ptr->num, |
int_scale, &n, &d); |
ci_ptr++; |
} |
} |
|
return 0; |
} |
|
/* Driver to normalize profile counters. */ |
|
int |
gcov_profile_normalize (struct gcov_info *profile, gcov_type max_val) |
{ |
struct gcov_info *gi_ptr; |
gcov_type curr_max_val = 0; |
unsigned f_ix; |
unsigned int i; |
float scale_factor; |
|
/* Find the largest count value. */ |
for (gi_ptr = profile; gi_ptr; gi_ptr = gi_ptr->next) |
for (f_ix = 0; f_ix < gi_ptr->n_functions; f_ix++) |
{ |
unsigned t_ix; |
const struct gcov_fn_info *gfi_ptr = gi_ptr->functions[f_ix]; |
const struct gcov_ctr_info *ci_ptr; |
|
if (!gfi_ptr || gfi_ptr->key != gi_ptr) |
continue; |
|
ci_ptr = gfi_ptr->ctrs; |
for (t_ix = 0; t_ix < 1; t_ix++) |
{ |
for (i = 0; i < ci_ptr->num; i++) |
if (ci_ptr->values[i] > curr_max_val) |
curr_max_val = ci_ptr->values[i]; |
ci_ptr++; |
} |
} |
|
scale_factor = (float)max_val / curr_max_val; |
if (verbose) |
fnotice (stdout, "max_val is %"PRId64"\n", curr_max_val); |
|
return gcov_profile_scale (profile, scale_factor, 0, 0); |
} |
|
/* The following variables are defined in gcc/gcov-tool.c. */ |
extern int overlap_func_level; |
extern int overlap_obj_level; |
extern int overlap_hot_only; |
extern int overlap_use_fullname; |
extern double overlap_hot_threshold; |
|
/* Compute the overlap score of two values. The score is defined as: |
min (V1/SUM_1, V2/SUM_2) */ |
|
static double |
calculate_2_entries (const unsigned long v1, const unsigned long v2, |
const double sum_1, const double sum_2) |
{ |
double val1 = (sum_1 == 0.0 ? 0.0 : v1/sum_1); |
double val2 = (sum_2 == 0.0 ? 0.0 : v2/sum_2); |
|
if (val2 < val1) |
val1 = val2; |
|
return val1; |
} |
|
/* Compute the overlap score between GCOV_INFO1 and GCOV_INFO2. |
SUM_1 is the sum_all for profile1 where GCOV_INFO1 belongs. |
SUM_2 is the sum_all for profile2 where GCOV_INFO2 belongs. |
This function also updates cumulative score CUM_1_RESULT and |
CUM_2_RESULT. */ |
|
static double |
compute_one_gcov (const struct gcov_info *gcov_info1, |
const struct gcov_info *gcov_info2, |
const double sum_1, const double sum_2, |
double *cum_1_result, double *cum_2_result) |
{ |
unsigned f_ix; |
double ret = 0; |
double cum_1 = 0, cum_2 = 0; |
const struct gcov_info *gcov_info = 0; |
double *cum_p; |
double sum; |
|
gcc_assert (gcov_info1 || gcov_info2); |
if (!gcov_info1) |
{ |
gcov_info = gcov_info2; |
cum_p = cum_2_result; |
sum = sum_2; |
*cum_1_result = 0; |
} else |
if (!gcov_info2) |
{ |
gcov_info = gcov_info1; |
cum_p = cum_1_result; |
sum = sum_1; |
*cum_2_result = 0; |
} |
|
if (gcov_info) |
{ |
for (f_ix = 0; f_ix < gcov_info->n_functions; f_ix++) |
{ |
unsigned t_ix; |
const struct gcov_fn_info *gfi_ptr = gcov_info->functions[f_ix]; |
if (!gfi_ptr || gfi_ptr->key != gcov_info) |
continue; |
const struct gcov_ctr_info *ci_ptr = gfi_ptr->ctrs; |
for (t_ix = 0; t_ix < GCOV_COUNTERS_SUMMABLE; t_ix++) |
{ |
unsigned c_num; |
|
if (!gcov_info->merge[t_ix]) |
continue; |
|
for (c_num = 0; c_num < ci_ptr->num; c_num++) |
{ |
cum_1 += ci_ptr->values[c_num] / sum; |
} |
ci_ptr++; |
} |
} |
*cum_p = cum_1; |
return 0.0; |
} |
|
for (f_ix = 0; f_ix < gcov_info1->n_functions; f_ix++) |
{ |
unsigned t_ix; |
double func_cum_1 = 0.0; |
double func_cum_2 = 0.0; |
double func_val = 0.0; |
int nonzero = 0; |
int hot = 0; |
const struct gcov_fn_info *gfi_ptr1 = gcov_info1->functions[f_ix]; |
const struct gcov_fn_info *gfi_ptr2 = gcov_info2->functions[f_ix]; |
|
if (!gfi_ptr1 || gfi_ptr1->key != gcov_info1) |
continue; |
if (!gfi_ptr2 || gfi_ptr2->key != gcov_info2) |
continue; |
|
const struct gcov_ctr_info *ci_ptr1 = gfi_ptr1->ctrs; |
const struct gcov_ctr_info *ci_ptr2 = gfi_ptr2->ctrs; |
for (t_ix = 0; t_ix < GCOV_COUNTERS_SUMMABLE; t_ix++) |
{ |
unsigned c_num; |
|
if (!gcov_info1->merge[t_ix]) |
continue; |
|
for (c_num = 0; c_num < ci_ptr1->num; c_num++) |
{ |
if (ci_ptr1->values[c_num] | ci_ptr2->values[c_num]) |
{ |
func_val += calculate_2_entries (ci_ptr1->values[c_num], |
ci_ptr2->values[c_num], |
sum_1, sum_2); |
|
func_cum_1 += ci_ptr1->values[c_num] / sum_1; |
func_cum_2 += ci_ptr2->values[c_num] / sum_2; |
nonzero = 1; |
if (ci_ptr1->values[c_num] / sum_1 >= overlap_hot_threshold || |
ci_ptr2->values[c_num] / sum_2 >= overlap_hot_threshold) |
hot = 1; |
} |
} |
ci_ptr1++; |
ci_ptr2++; |
} |
ret += func_val; |
cum_1 += func_cum_1; |
cum_2 += func_cum_2; |
if (overlap_func_level && nonzero && (!overlap_hot_only || hot)) |
{ |
printf(" \tfunc_id=%10d \toverlap =%6.5f%% (%5.5f%% %5.5f%%)\n", |
gfi_ptr1->ident, func_val*100, func_cum_1*100, func_cum_2*100); |
} |
} |
*cum_1_result = cum_1; |
*cum_2_result = cum_2; |
return ret; |
} |
|
/* Test if all counter values in this GCOV_INFO are cold. |
"Cold" is defined as the counter value being less than |
or equal to THRESHOLD. */ |
|
static bool |
gcov_info_count_all_cold (const struct gcov_info *gcov_info, |
gcov_type threshold) |
{ |
unsigned f_ix; |
|
for (f_ix = 0; f_ix < gcov_info->n_functions; f_ix++) |
{ |
unsigned t_ix; |
const struct gcov_fn_info *gfi_ptr = gcov_info->functions[f_ix]; |
|
if (!gfi_ptr || gfi_ptr->key != gcov_info) |
continue; |
const struct gcov_ctr_info *ci_ptr = gfi_ptr->ctrs; |
for (t_ix = 0; t_ix < GCOV_COUNTERS_SUMMABLE; t_ix++) |
{ |
unsigned c_num; |
|
if (!gcov_info->merge[t_ix]) |
continue; |
|
for (c_num = 0; c_num < ci_ptr->num; c_num++) |
{ |
if (ci_ptr->values[c_num] > threshold) |
return false; |
} |
ci_ptr++; |
} |
} |
|
return true; |
} |
|
/* Test if all counter values in this GCOV_INFO are 0. */ |
|
static bool |
gcov_info_count_all_zero (const struct gcov_info *gcov_info) |
{ |
return gcov_info_count_all_cold (gcov_info, 0); |
} |
|
/* A pair of matched GCOV_INFO. |
The flag is a bitvector: |
b0: obj1's all counts are 0; |
b1: obj1's all counts are cold (but no 0); |
b2: obj1 is hot; |
b3: no obj1 to match obj2; |
b4: obj2's all counts are 0; |
b5: obj2's all counts are cold (but no 0); |
b6: obj2 is hot; |
b7: no obj2 to match obj1; |
*/ |
struct overlap_t { |
const struct gcov_info *obj1; |
const struct gcov_info *obj2; |
char flag; |
}; |
|
#define FLAG_BOTH_ZERO(flag) ((flag & 0x1) && (flag & 0x10)) |
#define FLAG_BOTH_COLD(flag) ((flag & 0x2) && (flag & 0x20)) |
#define FLAG_ONE_HOT(flag) ((flag & 0x4) || (flag & 0x40)) |
|
/* Cumlative overlap dscore for profile1 and profile2. */ |
static double overlap_sum_1, overlap_sum_2; |
|
/* sum_all for profile1 and profile2. */ |
static gcov_type p1_sum_all, p2_sum_all; |
|
/* run_max for profile1 and profile2. */ |
static gcov_type p1_run_max, p2_run_max; |
|
/* The number of gcda files in the profiles. */ |
static unsigned gcda_files[2]; |
|
/* The number of unique gcda files in the profiles |
(not existing in the other profile). */ |
static unsigned unique_gcda_files[2]; |
|
/* The number of gcda files that all counter values are 0. */ |
static unsigned zero_gcda_files[2]; |
|
/* The number of gcda files that all counter values are cold (but not 0). */ |
static unsigned cold_gcda_files[2]; |
|
/* The number of gcda files that includes hot counter values. */ |
static unsigned hot_gcda_files[2]; |
|
/* The number of gcda files with hot count value in either profiles. */ |
static unsigned both_hot_cnt; |
|
/* The number of gcda files with all counts cold (but not 0) in |
both profiles. */ |
static unsigned both_cold_cnt; |
|
/* The number of gcda files with all counts 0 in both profiles. */ |
static unsigned both_zero_cnt; |
|
/* Extract the basename of the filename NAME. */ |
|
static char * |
extract_file_basename (const char *name) |
{ |
char *str; |
int len = 0; |
char *path = xstrdup (name); |
char sep_str[2]; |
|
sep_str[0] = DIR_SEPARATOR; |
sep_str[1] = 0; |
str = strstr(path, sep_str); |
do{ |
len = strlen(str) + 1; |
path = &path[strlen(path) - len + 2]; |
str = strstr(path, sep_str); |
} while(str); |
|
return path; |
} |
|
/* Utility function to get the filename. */ |
|
static const char * |
get_file_basename (const char *name) |
{ |
if (overlap_use_fullname) |
return name; |
return extract_file_basename (name); |
} |
|
/* A utility function to set the flag for the gcda files. */ |
|
static void |
set_flag (struct overlap_t *e) |
{ |
char flag = 0; |
|
if (!e->obj1) |
{ |
unique_gcda_files[1]++; |
flag = 0x8; |
} |
else |
{ |
gcda_files[0]++; |
if (gcov_info_count_all_zero (e->obj1)) |
{ |
zero_gcda_files[0]++; |
flag = 0x1; |
} |
else |
if (gcov_info_count_all_cold (e->obj1, overlap_sum_1 |
* overlap_hot_threshold)) |
{ |
cold_gcda_files[0]++; |
flag = 0x2; |
} |
else |
{ |
hot_gcda_files[0]++; |
flag = 0x4; |
} |
} |
|
if (!e->obj2) |
{ |
unique_gcda_files[0]++; |
flag |= (0x8 << 4); |
} |
else |
{ |
gcda_files[1]++; |
if (gcov_info_count_all_zero (e->obj2)) |
{ |
zero_gcda_files[1]++; |
flag |= (0x1 << 4); |
} |
else |
if (gcov_info_count_all_cold (e->obj2, overlap_sum_2 |
* overlap_hot_threshold)) |
{ |
cold_gcda_files[1]++; |
flag |= (0x2 << 4); |
} |
else |
{ |
hot_gcda_files[1]++; |
flag |= (0x4 << 4); |
} |
} |
|
gcc_assert (flag); |
e->flag = flag; |
} |
|
/* Test if INFO1 and INFO2 are from the matched source file. |
Return 1 if they match; return 0 otherwise. */ |
|
static int |
matched_gcov_info (const struct gcov_info *info1, const struct gcov_info *info2) |
{ |
/* For FDO, we have to match the name. This can be expensive. |
Maybe we should use hash here. */ |
if (strcmp (info1->filename, info2->filename)) |
return 0; |
|
if (info1->n_functions != info2->n_functions) |
{ |
fnotice (stderr, "mismatched profiles in %s (%d functions" |
" vs %d functions)\n", |
info1->filename, |
info1->n_functions, |
info2->n_functions); |
return 0; |
} |
return 1; |
} |
|
/* Defined in libgcov-driver.c. */ |
extern gcov_unsigned_t compute_summary (struct gcov_info *, |
struct gcov_summary *, size_t *); |
|
/* Compute the overlap score of two profiles with the head of GCOV_LIST1 and |
GCOV_LIST1. Return a number ranging from [0.0, 1.0], with 0.0 meaning no |
match and 1.0 meaning a perfect match. */ |
|
static double |
calculate_overlap (struct gcov_info *gcov_list1, |
struct gcov_info *gcov_list2) |
{ |
struct gcov_summary this_prg; |
unsigned list1_cnt = 0, list2_cnt= 0, all_cnt; |
unsigned int i, j; |
size_t max_length; |
const struct gcov_info *gi_ptr; |
struct overlap_t *all_infos; |
|
compute_summary (gcov_list1, &this_prg, &max_length); |
overlap_sum_1 = (double) (this_prg.ctrs[0].sum_all); |
p1_sum_all = this_prg.ctrs[0].sum_all; |
p1_run_max = this_prg.ctrs[0].run_max; |
compute_summary (gcov_list2, &this_prg, &max_length); |
overlap_sum_2 = (double) (this_prg.ctrs[0].sum_all); |
p2_sum_all = this_prg.ctrs[0].sum_all; |
p2_run_max = this_prg.ctrs[0].run_max; |
|
for (gi_ptr = gcov_list1; gi_ptr; gi_ptr = gi_ptr->next) |
list1_cnt++; |
for (gi_ptr = gcov_list2; gi_ptr; gi_ptr = gi_ptr->next) |
list2_cnt++; |
all_cnt = list1_cnt + list2_cnt; |
all_infos = (struct overlap_t *) xmalloc (sizeof (struct overlap_t) |
* all_cnt * 2); |
gcc_assert (all_infos); |
|
i = 0; |
for (gi_ptr = gcov_list1; gi_ptr; gi_ptr = gi_ptr->next, i++) |
{ |
all_infos[i].obj1 = gi_ptr; |
all_infos[i].obj2 = 0; |
} |
|
for (gi_ptr = gcov_list2; gi_ptr; gi_ptr = gi_ptr->next, i++) |
{ |
all_infos[i].obj1 = 0; |
all_infos[i].obj2 = gi_ptr; |
} |
|
for (i = list1_cnt; i < all_cnt; i++) |
{ |
if (all_infos[i].obj2 == 0) |
continue; |
for (j = 0; j < list1_cnt; j++) |
{ |
if (all_infos[j].obj2 != 0) |
continue; |
if (matched_gcov_info (all_infos[i].obj2, all_infos[j].obj1)) |
{ |
all_infos[j].obj2 = all_infos[i].obj2; |
all_infos[i].obj2 = 0; |
break; |
} |
} |
} |
|
for (i = 0; i < all_cnt; i++) |
if (all_infos[i].obj1 || all_infos[i].obj2) |
{ |
set_flag (all_infos + i); |
if (FLAG_ONE_HOT (all_infos[i].flag)) |
both_hot_cnt++; |
if (FLAG_BOTH_COLD(all_infos[i].flag)) |
both_cold_cnt++; |
if (FLAG_BOTH_ZERO(all_infos[i].flag)) |
both_zero_cnt++; |
} |
|
double prg_val = 0; |
double sum_val = 0; |
double sum_cum_1 = 0; |
double sum_cum_2 = 0; |
|
for (i = 0; i < all_cnt; i++) |
{ |
double val; |
double cum_1, cum_2; |
const char *filename; |
|
if (all_infos[i].obj1 == 0 && all_infos[i].obj2 == 0) |
continue; |
if (FLAG_BOTH_ZERO (all_infos[i].flag)) |
continue; |
|
if (all_infos[i].obj1) |
filename = get_file_basename (all_infos[i].obj1->filename); |
else |
filename = get_file_basename (all_infos[i].obj2->filename); |
|
if (overlap_func_level) |
printf("\n processing %36s:\n", filename); |
|
val = compute_one_gcov (all_infos[i].obj1, all_infos[i].obj2, |
overlap_sum_1, overlap_sum_2, &cum_1, &cum_2); |
|
if (overlap_obj_level && (!overlap_hot_only || FLAG_ONE_HOT (all_infos[i].flag))) |
{ |
printf(" obj=%36s overlap = %6.2f%% (%5.2f%% %5.2f%%)\n", |
filename, val*100, cum_1*100, cum_2*100); |
sum_val += val; |
sum_cum_1 += cum_1; |
sum_cum_2 += cum_2; |
} |
|
prg_val += val; |
|
} |
|
if (overlap_obj_level) |
printf(" SUM:%36s overlap = %6.2f%% (%5.2f%% %5.2f%%)\n", |
"", sum_val*100, sum_cum_1*100, sum_cum_2*100); |
|
printf (" Statistics:\n" |
" profile1_# profile2_# overlap_#\n"); |
printf (" gcda files: %12u\t%12u\t%12u\n", gcda_files[0], gcda_files[1], |
gcda_files[0]-unique_gcda_files[0]); |
printf (" unique files: %12u\t%12u\n", unique_gcda_files[0], |
unique_gcda_files[1]); |
printf (" hot files: %12u\t%12u\t%12u\n", hot_gcda_files[0], |
hot_gcda_files[1], both_hot_cnt); |
printf (" cold files: %12u\t%12u\t%12u\n", cold_gcda_files[0], |
cold_gcda_files[1], both_cold_cnt); |
printf (" zero files: %12u\t%12u\t%12u\n", zero_gcda_files[0], |
zero_gcda_files[1], both_zero_cnt); |
printf (" sum_all: %12"PRId64"\t%12"PRId64"\n", p1_sum_all, p2_sum_all); |
printf (" run_max: %12"PRId64"\t%12"PRId64"\n", p1_run_max, p2_run_max); |
|
return prg_val; |
} |
|
/* Computer the overlap score of two lists of gcov_info objects PROFILE1 and PROFILE2. |
Return 0 on success: without mismatch. Reutrn 1 on error. */ |
|
int |
gcov_profile_overlap (struct gcov_info *profile1, struct gcov_info *profile2) |
{ |
double result; |
|
result = calculate_overlap (profile1, profile2); |
|
if (result > 0) |
{ |
printf("\nProgram level overlap result is %3.2f%%\n\n", result*100); |
return 0; |
} |
return 1; |
} |