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/* Header file of sample profile in GCC.
Copyright (C) 2008
Free Software Foundation, Inc.
Contributed by Paul Yuan (yingbo.com@gmail.com)
and Vinodha Ramasamy (vinodha@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.
You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING3. If not see
<http://www.gnu.org/licenses/>. */
/* References:
[1] "Feedback-directed Optimizations in GCC with Estimated Edge Profiles
from Hardware Event Sampling", Vinodha Ramasamy, Paul Yuan, Dehao Chen,
and Robert Hundt; GCC Summit 2008.
*/
#ifndef _SAMPLE_PROFILE_H
#define _SAMPLE_PROFILE_H
#include "input.h"
#define FB_SAMPLE_NIDENT 16
#define FB_SAMPLE_MAJOR_VERSION 1
#define FB_SAMPLE_MINOR_VERSION 1
#define SP_HTAB_INIT_SIZE 2000
#define SP_INLINE_HTAB_INIT_SIZE 2000
#define SP_FUNCNAME_HTAB_INIT_SIZE 2000
/* Organization of sample file is as follows:
fb_sample_hdr
pu_hdr 1
pu_hdr 2
pu_hdr 3 ...
inline_hdr 1
inline_hdr 2 ...
str_table
module_hdr 1
module_hdr 2 ...
Module_Profile_Data
Profile_Data. */
struct fb_sample_hdr
{
/* Identifier. */
char fb_ident[FB_SAMPLE_NIDENT];
/* File version. */
unsigned int fb_version;
/* Total number of inline function hdrs. */
unsigned int fb_func_inline_hdr_num;
/* Function header file offset. */
unsigned long long fb_func_hdr_offset;
/* Module header offset. */
unsigned long long fb_module_hdr_offset;
/* Number of module header. */
unsigned long long fb_num_module_hdr;
/* Module profile size. */
unsigned long long fb_module_profile_size;
/* Function header entry size. */
unsigned int fb_func_hdr_ent_size;
/* Number of function header entries. */
unsigned int fb_func_hdr_num;
unsigned long long fb_str_table_offset;
unsigned long long fb_str_table_size;
/* File offset for profile data. */
unsigned long long fb_profile_offset;
};
/* Header for each function. */
struct func_sample_hdr
{
int func_checksum;
int inline_depth;
unsigned long long sampling_rate;
/* Sum of samples including inlined function samples. */
unsigned long long total_samples;
/* Samples of the entry BB. */
unsigned long long entry_count;
/* Offset into string table. */
unsigned long long func_name_index;
/* Offset into profile section relative to fb_profile_offset. */
unsigned long long func_profile_offset;
/* Offsets into different profile data follows. */
unsigned long long func_freq_offset;
unsigned long long func_num_freq_entries;
/* Used to hold inline stack if inline_depth > 0. */
/* inline_depth number of fb_info_inline_stack entries are stored. */
unsigned long long inline_stack_offset;
/* Offsets into histogram profile section relative to fb_hist_table_offset */
unsigned long long func_hist_table_offset;
unsigned long long func_num_hist_entries;
/* Offset relative to start of inline hdrs section. */
unsigned long long func_inline_hdr_offset;
unsigned long long func_num_inline_entries;
/* Used only for inlined routines. */
unsigned long long func_parent_hdr_offset;
/* For future use. */
unsigned long long reserved1;
unsigned long long reserved2;
};
/* Header for each module. */
struct module_sample_hdr
{
/* Offset into string table. */
unsigned long long module_name_index;
/* Offset into file profile section. */
unsigned long long module_profile_offset;
/* Number of modules related to this file. */
unsigned long long num_aux_modules;
/* Number of quote paths entries. */
unsigned long long num_quote_paths;
/* Number of bracket paths entries. */
unsigned long long num_bracket_paths;
/* Number of cpp define entries. */
unsigned long long num_cpp_defines;
/* Number of cpp include entries. */
unsigned long long num_cpp_includes;
/* Number of cl arg entreis. */
unsigned long long num_cl_args;
/* Flag that represent if the module is exported. */
unsigned exported;
/* Flag that represent if the module has asm. */
unsigned has_asm;
};
struct fb_info_module
{
unsigned long long string_offset;
};
struct fb_info_freq
{
unsigned long long filename_offset;
int line_num;
int discriminator;
int num_instr;
float freq;
unsigned long long num_value;
unsigned long long hist_offset;
};
enum fb_histogram_type
{
CALL_HIST,
STRINGOP_HIST,
DIVMOD_HIST
};
struct fb_info_hist
{
enum fb_histogram_type type;
unsigned long long value;
int count;
};
struct fb_info_inline_stack_entry
{
unsigned long long filename_offset;
int line_num;
int discriminator;
};
struct sample_hist
{
enum fb_histogram_type type;
union
{
char *func_name;
unsigned long long value;
} value;
int count;
};
/* Store line number and it's associated count. */
struct sample_freq_detail
{
const char *filename;
const char *func_name;
int line_num;
int discriminator;
int num_instr;
unsigned long long num_value;
struct sample_hist *values;
float freq;
};
struct expanded_inline_location {
expanded_location loc;
int discriminator;
};
struct sample_inline_freq
{
bool is_first;
int depth;
int line_num;
int discriminator;
struct expanded_inline_location *inline_stack;
const char *func_name;
const char *filename;
int num_instr;
unsigned long long num_value;
struct sample_hist *values;
float freq;
};
#define MAX_IND_FUNCS 1024
struct sample_indirect_call
{
const char *func_name;
unsigned num_values;
const char *targets[MAX_IND_FUNCS];
unsigned long long count[MAX_IND_FUNCS];
};
/* Store profile per feedback data file. */
struct profile
{
struct fb_sample_hdr fb_hdr;
char *str_table;
};
extern void init_sample_profile (void);
extern void end_sample_profile (void);
extern unsigned long long get_total_count (gimple, const char *);
extern unsigned long long get_total_count_edge (struct cgraph_edge *,
const char *);
extern void sp_annotate_bb (basic_block);
extern void sp_smooth_cfg (void);
extern void sp_add_funcname_mapping (const char *, const char *);
extern const char *sp_get_real_funcname (const char *name);
extern void sp_set_sample_profile (gcov_type max_count);
extern void gimple_sample_vpt (gimple, struct sample_hist *, int);
extern struct sample_indirect_call *sp_get_indirect_calls (const char *);
#endif
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