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/* Vector API for GNU compiler.
Copyright (C) 2004-2016 Free Software Foundation, Inc.
Contributed by Nathan Sidwell <nathan@codesourcery.com>
Re-implemented in C++ by Diego Novillo <dnovillo@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/>. */
/* This file is compiled twice: once for the generator programs
once for the compiler. */
#ifdef GENERATOR_FILE
#include "bconfig.h"
#else
#include "config.h"
#endif
#include "system.h"
#include "coretypes.h"
#include "hash-table.h"
/* vNULL is an empty type with a template cast operation that returns
a zero-initialized vec<T, A, L> instance. Use this when you want
to assign nil values to new vec instances or pass a nil vector as
a function call argument.
We use this technique because vec<T, A, L> must be PODs (they are
stored in unions and passed in vararg functions), this means that
they cannot have ctors/dtors. */
vnull vNULL;
/* Vector memory usage. */
struct vec_usage: public mem_usage
{
/* Default constructor. */
vec_usage (): m_items (0), m_items_peak (0) {}
/* Constructor. */
vec_usage (size_t allocated, size_t times, size_t peak,
size_t items, size_t items_peak)
: mem_usage (allocated, times, peak),
m_items (items), m_items_peak (items_peak) {}
/* Comparison operator. */
inline bool
operator< (const vec_usage &second) const
{
return (m_allocated == second.m_allocated ?
(m_peak == second.m_peak ? m_times < second.m_times
: m_peak < second.m_peak) : m_allocated < second.m_allocated);
}
/* Sum the usage with SECOND usage. */
vec_usage
operator+ (const vec_usage &second)
{
return vec_usage (m_allocated + second.m_allocated,
m_times + second.m_times,
m_peak + second.m_peak,
m_items + second.m_items,
m_items_peak + second.m_items_peak);
}
/* Dump usage coupled to LOC location, where TOTAL is sum of all rows. */
inline void
dump (mem_location *loc, mem_usage &total) const
{
char s[4096];
sprintf (s, "%s:%i (%s)", loc->get_trimmed_filename (),
loc->m_line, loc->m_function);
s[48] = '\0';
fprintf (stderr, "%-48s %10li:%4.1f%%%10li%10li:%4.1f%%%11li%11li\n", s,
(long)m_allocated, m_allocated * 100.0 / total.m_allocated,
(long)m_peak, (long)m_times, m_times * 100.0 / total.m_times,
(long)m_items, (long)m_items_peak);
}
/* Dump footer. */
inline void
dump_footer ()
{
print_dash_line ();
fprintf (stderr, "%s%55li%25li%17li\n", "Total", (long)m_allocated,
(long)m_times, (long)m_items);
print_dash_line ();
}
/* Dump header with NAME. */
static inline void
dump_header (const char *name)
{
fprintf (stderr, "%-48s %11s%15s%10s%17s%11s\n", name, "Leak", "Peak",
"Times", "Leak items", "Peak items");
print_dash_line ();
}
/* Compare wrapper used by qsort method. */
static int
compare (const void *first, const void *second)
{
typedef std::pair<mem_location *, vec_usage *> mem_pair_t;
const mem_pair_t f = *(const mem_pair_t *)first;
const mem_pair_t s = *(const mem_pair_t *)second;
return (*f.second) < (*s.second);
}
/* Current number of items allocated. */
size_t m_items;
/* Peak value of number of allocated items. */
size_t m_items_peak;
};
/* Vector memory description. */
static mem_alloc_description <vec_usage> vec_mem_desc;
/* Account the overhead. */
void
vec_prefix::register_overhead (void *ptr, size_t size, size_t elements
MEM_STAT_DECL)
{
vec_mem_desc.register_descriptor (ptr, VEC_ORIGIN, false
FINAL_PASS_MEM_STAT);
vec_usage *usage = vec_mem_desc.register_instance_overhead (size, ptr);
usage->m_items += elements;
if (usage->m_items_peak < usage->m_items)
usage->m_items_peak = usage->m_items;
}
/* Notice that the memory allocated for the vector has been freed. */
void
vec_prefix::release_overhead (void *ptr, size_t size, bool in_dtor
MEM_STAT_DECL)
{
if (!vec_mem_desc.contains_descriptor_for_instance (ptr))
vec_mem_desc.register_descriptor (ptr, VEC_ORIGIN,
false FINAL_PASS_MEM_STAT);
vec_mem_desc.release_instance_overhead (ptr, size, in_dtor);
}
/* Calculate the number of slots to reserve a vector, making sure that
it is of at least DESIRED size by growing ALLOC exponentially. */
unsigned
vec_prefix::calculate_allocation_1 (unsigned alloc, unsigned desired)
{
/* We must have run out of room. */
gcc_assert (alloc < desired);
/* Exponential growth. */
if (!alloc)
alloc = 4;
else if (alloc < 16)
/* Double when small. */
alloc = alloc * 2;
else
/* Grow slower when large. */
alloc = (alloc * 3 / 2);
/* If this is still too small, set it to the right size. */
if (alloc < desired)
alloc = desired;
return alloc;
}
/* Dump per-site memory statistics. */
void
dump_vec_loc_statistics (void)
{
vec_mem_desc.dump (VEC_ORIGIN);
}
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