/usr/lib/gcc-cross/powerpc64-linux-gnu/7/plugin/include/ggc.h is in gcc-7-plugin-dev-powerpc64-linux-gnu 7.3.0-16ubuntu3cross1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 | /* Garbage collection for the GNU compiler.
Copyright (C) 1998-2017 Free Software Foundation, Inc.
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/>. */
#ifndef GCC_GGC_H
#define GCC_GGC_H
/* Symbols are marked with `ggc' for `gcc gc' so as not to interfere with
an external gc library that might be linked in. */
/* Constants for general use. */
extern const char empty_string[]; /* empty string */
/* Internal functions and data structures used by the GTY
machinery, including the generated gt*.[hc] files. */
#include "gtype-desc.h"
/* One of these applies its third parameter (with cookie in the fourth
parameter) to each pointer in the object pointed to by the first
parameter, using the second parameter. */
typedef void (*gt_note_pointers) (void *, void *, gt_pointer_operator,
void *);
/* One of these is called before objects are re-ordered in memory.
The first parameter is the original object, the second is the
subobject that has had its pointers reordered, the third parameter
can compute the new values of a pointer when given the cookie in
the fourth parameter. */
typedef void (*gt_handle_reorder) (void *, void *, gt_pointer_operator,
void *);
/* Used by the gt_pch_n_* routines. Register an object in the hash table. */
extern int gt_pch_note_object (void *, void *, gt_note_pointers);
/* Used by the gt_pch_n_* routines. Register that an object has a reorder
function. */
extern void gt_pch_note_reorder (void *, void *, gt_handle_reorder);
/* generated function to clear caches in gc memory. */
extern void gt_clear_caches ();
/* Mark the object in the first parameter and anything it points to. */
typedef void (*gt_pointer_walker) (void *);
/* Structures for the easy way to mark roots.
In an array, terminated by having base == NULL. */
struct ggc_root_tab {
void *base;
size_t nelt;
size_t stride;
gt_pointer_walker cb;
gt_pointer_walker pchw;
};
#define LAST_GGC_ROOT_TAB { NULL, 0, 0, NULL, NULL }
/* Pointers to arrays of ggc_root_tab, terminated by NULL. */
extern const struct ggc_root_tab * const gt_ggc_rtab[];
extern const struct ggc_root_tab * const gt_ggc_deletable_rtab[];
extern const struct ggc_root_tab * const gt_pch_scalar_rtab[];
/* If EXPR is not NULL and previously unmarked, mark it and evaluate
to true. Otherwise evaluate to false. */
#define ggc_test_and_set_mark(EXPR) \
((EXPR) != NULL && ((void *) (EXPR)) != (void *) 1 && ! ggc_set_mark (EXPR))
#define ggc_mark(EXPR) \
do { \
const void *const a__ = (EXPR); \
if (a__ != NULL && a__ != (void *) 1) \
ggc_set_mark (a__); \
} while (0)
/* Actually set the mark on a particular region of memory, but don't
follow pointers. This function is called by ggc_mark_*. It
returns zero if the object was not previously marked; nonzero if
the object was already marked, or if, for any other reason,
pointers in this data structure should not be traversed. */
extern int ggc_set_mark (const void *);
/* Return 1 if P has been marked, zero otherwise.
P must have been allocated by the GC allocator; it mustn't point to
static objects, stack variables, or memory allocated with malloc. */
extern int ggc_marked_p (const void *);
/* PCH and GGC handling for strings, mostly trivial. */
extern void gt_pch_n_S (const void *);
extern void gt_ggc_m_S (const void *);
/* End of GTY machinery API. */
/* Initialize the string pool. */
extern void init_stringpool (void);
/* Initialize the garbage collector. */
extern void init_ggc (void);
/* When true, identifier nodes are considered as GC roots. When
false, identifier nodes are treated like any other GC-allocated
object, and the identifier hash table is treated as a weak
hash. */
extern bool ggc_protect_identifiers;
/* Write out all GCed objects to F. */
extern void gt_pch_save (FILE *f);
/* Allocation. */
/* The internal primitive. */
extern void *ggc_internal_alloc (size_t, void (*)(void *), size_t,
size_t CXX_MEM_STAT_INFO)
ATTRIBUTE_MALLOC;
static inline
void *
ggc_internal_alloc (size_t s CXX_MEM_STAT_INFO)
{
return ggc_internal_alloc (s, NULL, 0, 1 PASS_MEM_STAT);
}
extern size_t ggc_round_alloc_size (size_t requested_size);
/* Allocates cleared memory. */
extern void *ggc_internal_cleared_alloc (size_t, void (*)(void *),
size_t, size_t
CXX_MEM_STAT_INFO) ATTRIBUTE_MALLOC;
static inline
void *
ggc_internal_cleared_alloc (size_t s CXX_MEM_STAT_INFO)
{
return ggc_internal_cleared_alloc (s, NULL, 0, 1 PASS_MEM_STAT);
}
/* Resize a block. */
extern void *ggc_realloc (void *, size_t CXX_MEM_STAT_INFO);
/* Free a block. To be used when known for certain it's not reachable. */
extern void ggc_free (void *);
extern void dump_ggc_loc_statistics (bool);
/* Reallocator. */
#define GGC_RESIZEVEC(T, P, N) \
((T *) ggc_realloc ((P), (N) * sizeof (T) MEM_STAT_INFO))
template<typename T>
void
finalize (void *p)
{
static_cast<T *> (p)->~T ();
}
template<typename T>
static inline bool
need_finalization_p ()
{
#if GCC_VERSION >= 4003
return !__has_trivial_destructor (T);
#else
return true;
#endif
}
template<typename T>
static inline T *
ggc_alloc (ALONE_CXX_MEM_STAT_INFO)
{
if (need_finalization_p<T> ())
return static_cast<T *> (ggc_internal_alloc (sizeof (T), finalize<T>, 0, 1
PASS_MEM_STAT));
else
return static_cast<T *> (ggc_internal_alloc (sizeof (T), NULL, 0, 1
PASS_MEM_STAT));
}
template<typename T>
static inline T *
ggc_cleared_alloc (ALONE_CXX_MEM_STAT_INFO)
{
if (need_finalization_p<T> ())
return static_cast<T *> (ggc_internal_cleared_alloc (sizeof (T),
finalize<T>, 0, 1
PASS_MEM_STAT));
else
return static_cast<T *> (ggc_internal_cleared_alloc (sizeof (T), NULL, 0, 1
PASS_MEM_STAT));
}
template<typename T>
static inline T *
ggc_vec_alloc (size_t c CXX_MEM_STAT_INFO)
{
if (need_finalization_p<T> ())
return static_cast<T *> (ggc_internal_alloc (c * sizeof (T), finalize<T>,
sizeof (T), c PASS_MEM_STAT));
else
return static_cast<T *> (ggc_internal_alloc (c * sizeof (T), NULL, 0, 0
PASS_MEM_STAT));
}
template<typename T>
static inline T *
ggc_cleared_vec_alloc (size_t c CXX_MEM_STAT_INFO)
{
if (need_finalization_p<T> ())
return static_cast<T *> (ggc_internal_cleared_alloc (c * sizeof (T),
finalize<T>,
sizeof (T), c
PASS_MEM_STAT));
else
return static_cast<T *> (ggc_internal_cleared_alloc (c * sizeof (T), NULL,
0, 0 PASS_MEM_STAT));
}
static inline void *
ggc_alloc_atomic (size_t s CXX_MEM_STAT_INFO)
{
return ggc_internal_alloc (s PASS_MEM_STAT);
}
/* Allocate a gc-able string, and fill it with LENGTH bytes from CONTENTS.
If LENGTH is -1, then CONTENTS is assumed to be a
null-terminated string and the memory sized accordingly. */
extern const char *ggc_alloc_string (const char *contents, int length
CXX_MEM_STAT_INFO);
/* Make a copy of S, in GC-able memory. */
#define ggc_strdup(S) ggc_alloc_string ((S), -1 MEM_STAT_INFO)
/* Invoke the collector. Garbage collection occurs only when this
function is called, not during allocations. */
extern void ggc_collect (void);
/* Assume that all GGC memory is reachable and grow the limits for next collection. */
extern void ggc_grow (void);
/* Register an additional root table. This can be useful for some
plugins. Does nothing if the passed pointer is NULL. */
extern void ggc_register_root_tab (const struct ggc_root_tab *);
/* Read objects previously saved with gt_pch_save from F. */
extern void gt_pch_restore (FILE *f);
/* Statistics. */
/* Print allocation statistics. */
extern void ggc_print_statistics (void);
extern void stringpool_statistics (void);
/* Heuristics. */
extern void init_ggc_heuristics (void);
#define ggc_alloc_rtvec_sized(NELT) \
(rtvec_def *) ggc_internal_alloc (sizeof (struct rtvec_def) \
+ ((NELT) - 1) * sizeof (rtx)) \
/* Memory statistics passing versions of some allocators. Too few of them to
make gengtype produce them, so just define the needed ones here. */
static inline struct rtx_def *
ggc_alloc_rtx_def_stat (size_t s CXX_MEM_STAT_INFO)
{
return (struct rtx_def *) ggc_internal_alloc (s PASS_MEM_STAT);
}
static inline union tree_node *
ggc_alloc_tree_node_stat (size_t s CXX_MEM_STAT_INFO)
{
return (union tree_node *) ggc_internal_alloc (s PASS_MEM_STAT);
}
static inline union tree_node *
ggc_alloc_cleared_tree_node_stat (size_t s CXX_MEM_STAT_INFO)
{
return (union tree_node *) ggc_internal_cleared_alloc (s PASS_MEM_STAT);
}
static inline gimple *
ggc_alloc_cleared_gimple_statement_stat (size_t s CXX_MEM_STAT_INFO)
{
return (gimple *) ggc_internal_cleared_alloc (s PASS_MEM_STAT);
}
static inline void
gt_ggc_mx (const char *s)
{
ggc_test_and_set_mark (const_cast<char *> (s));
}
static inline void
gt_pch_nx (const char *)
{
}
static inline void
gt_ggc_mx (int)
{
}
static inline void
gt_pch_nx (int)
{
}
static inline void
gt_pch_nx (unsigned int)
{
}
#endif
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