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Data Structures
struct	ggc_statistics

Functions
void	ggc_mark_roots (void)
void	ggc_mark_stringpool (void)
void	ggc_purge_stringpool (void)
void	gt_pch_save_stringpool (void)
void	gt_pch_fixup_stringpool (void)
void	gt_pch_restore_stringpool (void)
void	gt_pch_p_S (void , void , gt_pointer_operator, void *)
struct ggc_pch_data *	init_ggc_pch (void)
void	ggc_pch_count_object (struct ggc_pch_data , void , size_t)
size_t	ggc_pch_total_size (struct ggc_pch_data *)
void	ggc_pch_this_base (struct ggc_pch_data , void )
char *	ggc_pch_alloc_object (struct ggc_pch_data , void , size_t)
void	ggc_pch_prepare_write (struct ggc_pch_data , FILE )
void	ggc_pch_write_object (struct ggc_pch_data , FILE , void , void , size_t)
void	ggc_pch_finish (struct ggc_pch_data , FILE )
void	ggc_pch_read (FILE , void )
void	ggc_record_overhead (size_t, size_t, void *FINAL_MEM_STAT_DECL)
void	ggc_free_overhead (void *)
void	ggc_prune_overhead_list (void)
size_t	ggc_get_size (const void *)
void	ggc_print_common_statistics (FILE , ggc_statistics )

Function Documentation

◆ ggc_free_overhead()

void ggc_free_overhead ( void * ptr )

extern

Notice that the pointer has been freed.

References ggc_free_overhead(), and ggc_mem_desc().

Referenced by ggc_free(), ggc_free_overhead(), and ggc_record_overhead().

◆ ggc_get_size()

size_t ggc_get_size ( const void * p )

extern

Return the number of bytes allocated at the indicated address.

Return the size of the gc-able object P.

References ggc_get_size(), lookup_page_table_entry(), OBJECT_SIZE, and page_entry::order.

Referenced by ggc_get_size(), ggc_realloc(), ggc_record_overhead(), and gt_pch_note_object().

◆ ggc_mark_roots()

void ggc_mark_roots ( void )

extern

Garbage collection for the GNU compiler.  Internal definitions
   for ggc-*.c and stringpool.cc.

   Copyright (C) 2009-2026 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/>.

Call ggc_set_mark on all the roots.

Iterate through all registered roots and mark each element.

References ggc_root_tab::base, extra_root_vec, FOR_EACH_VEC_ELT, ggc_mark_root_tab(), ggc_mark_roots(), ggc_mark_stringpool(), ggc_protect_identifiers, ggc_purge_stringpool(), gt_clear_caches(), gt_ggc_deletable_rtab, gt_ggc_rtab, i, invoke_plugin_callbacks(), ggc_root_tab::nelt, NULL, and ggc_root_tab::stride.

Referenced by ggc_collect(), and ggc_mark_roots().

◆ ggc_mark_stringpool()

void ggc_mark_stringpool ( void )

extern

Stringpool.

Mark the entries in the string pool.

Mark the trees hanging off the identifier node for GGC.  These are
handled specially (not using gengtype) because identifiers are only
roots during one part of compilation.

References ggc_mark_stringpool(), ident_hash, ident_hash_extra, mark_ident(), and NULL.

Referenced by ggc_mark_roots(), and ggc_mark_stringpool().

◆ ggc_pch_alloc_object()

char * ggc_pch_alloc_object	(	struct ggc_pch_data *	d,
		void *	x,
		size_t	size )

extern

Assuming that the objects really do end up at the address
passed to ggc_pch_this_base, return the address of this object.

References ggc_pch_data::d, ggc_pch_alloc_object(), NUM_SIZE_LOOKUP, OBJECT_SIZE, and size_lookup.

Referenced by ggc_call_alloc(), and ggc_pch_alloc_object().

◆ ggc_pch_count_object()

void ggc_pch_count_object	(	struct ggc_pch_data *	d,
		void *	x,
		size_t	size )

extern

The second parameter and third parameters give the address and size
of an object.  Update the ggc_pch_data structure with as much of
that information as is necessary.

References ggc_pch_data::d, ggc_pch_count_object(), NUM_SIZE_LOOKUP, OBJECT_SIZE, size_lookup, and ggc_pch_ondisk::totals.

Referenced by ggc_call_count(), and ggc_pch_count_object().

◆ ggc_pch_finish()

void ggc_pch_finish	(	struct ggc_pch_data *	d,
		FILE *	f )

extern

All objects have been written, write out any final information
required.

References ggc_pch_data::d, fatal_error(), free(), ggc_pch_finish(), and input_location.

Referenced by ggc_pch_finish(), and gt_pch_save().

◆ ggc_pch_prepare_write()

void ggc_pch_prepare_write	(	struct ggc_pch_data *	d,
		FILE *	f )

extern

Write out any initial information required.

References ggc_pch_prepare_write().

Referenced by ggc_pch_prepare_write(), and gt_pch_save().

◆ ggc_pch_read()

void ggc_pch_read	(	FILE *	f,
		void *	addr )

extern

A PCH file has just been read in at the address specified second
parameter.  Set up the GC implementation for the new objects.

References ggc_globals::allocated, ggc_globals::allocated_last_gc, BITMAP_SIZE, ggc_globals::by_depth_in_use, page_entry::bytes, clear_marks(), ggc_globals::context_depth, page_entry::context_depth, fatal_error(), ggc_globals::finalizers, find_free_list(), page_entry::free_list, G, gcc_assert, ggc_pch_read(), HOST_BITS_PER_LONG, i, page_entry::in_use_p, input_location, move_ptes_to_front(), page_entry::next, NULL, page_entry::num_free_objects, NUM_ORDERS, OBJECT_SIZE, page_entry::order, page_entry::page, PAGE_ALIGN, ggc_globals::page_tails, ggc_globals::pages, ggc_globals::pagesize, poison_pages, push_by_depth(), set_page_table_entry(), ggc_pch_ondisk::totals, validate_free_objects, ggc_globals::vec_finalizers, and vNULL.

Referenced by ggc_pch_read(), and gt_pch_restore().

◆ ggc_pch_this_base()

void ggc_pch_this_base	(	struct ggc_pch_data *	d,
		void *	base )

extern

The objects, when read, will most likely be at the address
in the second parameter.

References a, ggc_pch_data::base, ggc_pch_data::d, ggc_pch_this_base(), i, NUM_ORDERS, OBJECT_SIZE, PAGE_ALIGN, and ggc_pch_ondisk::totals.

Referenced by ggc_pch_this_base(), and gt_pch_save().

◆ ggc_pch_total_size()

size_t ggc_pch_total_size ( struct ggc_pch_data * d )

extern

Return the total size of the data to be written to hold all
the objects previously passed to ggc_pch_count_object.

References a, ggc_pch_data::d, ggc_pch_total_size(), i, NUM_ORDERS, OBJECT_SIZE, PAGE_ALIGN, and ggc_pch_ondisk::totals.

Referenced by ggc_pch_total_size(), and gt_pch_save().

◆ ggc_pch_write_object()

void ggc_pch_write_object	(	struct ggc_pch_data *	d,
		FILE *	f,
		void *	x,
		void *	newx,
		size_t	size )

extern

Write out this object, including any padding.

References ggc_pch_data::d, fatal_error(), G, ggc_pch_write_object(), input_location, NUM_SIZE_LOOKUP, OBJECT_SIZE, ggc_globals::pagesize, ROUND_UP_VALUE, SEEK_CUR, size_lookup, and ggc_pch_ondisk::totals.

Referenced by ggc_pch_write_object(), and gt_pch_save().

◆ ggc_print_common_statistics()

void ggc_print_common_statistics	(	FILE *	stream,
		ggc_statistics *	stats )

extern

Used by the various collectors to gather and print statistics that
do not depend on the collector in use.

References ggc_print_common_statistics(), ggc_stats, and NULL.

Referenced by ggc_print_common_statistics(), and ggc_print_statistics().

◆ ggc_prune_overhead_list()

void ggc_prune_overhead_list ( void )

extern

After live values has been marked, walk all recorded pointers and see if
they are still live.

References ggc_marked_p(), ggc_mem_desc(), and ggc_prune_overhead_list().

Referenced by ggc_collect(), ggc_prune_overhead_list(), and ggc_record_overhead().

◆ ggc_purge_stringpool()

void ggc_purge_stringpool ( void )

extern

Purge the entries in the string pool.

Purge the identifier hash of identifiers which are no longer
referenced.

References ggc_marked_p(), ggc_purge_stringpool(), ident_hash, ident_hash_extra, maybe_delete_ident(), and NULL.

Referenced by ggc_mark_roots(), and ggc_purge_stringpool().

◆ ggc_record_overhead()

void ggc_record_overhead	(	size_t	,
		size_t	,
		void *	FINAL_MEM_STAT_DECL )

extern

Allocation and collection.

References FINAL_MEM_STAT_DECL, ggc_free_overhead(), ggc_get_size(), ggc_prune_overhead_list(), and ggc_record_overhead().

◆ gt_pch_fixup_stringpool()

void gt_pch_fixup_stringpool ( void )

extern

Return the stringpool to its state before gt_pch_save_stringpool
was called.

Referenced by gt_pch_save().

◆ gt_pch_p_S()

void gt_pch_p_S	(	void *	obj,
		void *	x,
		gt_pointer_operator	op,
		void *	cookie )

extern

PCH and GGC handling for strings, mostly trivial.

Pointer-walking routine for strings (not very interesting, since
strings don't contain pointers).

References gcc_unreachable, and gt_pch_p_S().

Referenced by gt_pch_n_S(), gt_pch_n_S2(), gt_pch_note_object(), gt_pch_note_reorder(), gt_pch_p_S(), and gt_pch_save().

◆ gt_pch_restore_stringpool()

void gt_pch_restore_stringpool ( void )

extern

A PCH file has been restored, which loaded SPD; fill the real hash table
from SPD.

Referenced by gt_pch_restore().

◆ gt_pch_save_stringpool()

void gt_pch_save_stringpool ( void )

extern

Save and restore the string pool entries for PCH.

Save the stringpool data in SPD.

References string_pool_data::entries, string_pool_data_extra::entries, ggc_alloc(), ggc_vec_alloc(), gt_pch_save_stringpool(), GTY, ident_hash, ident_hash_extra, string_pool_data::nelements, string_pool_data_extra::nelements, string_pool_data::nslots, string_pool_data_extra::nslots, spd, and spd2.

Referenced by gt_pch_save(), and gt_pch_save_stringpool().

◆ init_ggc_pch()

struct ggc_pch_data * init_ggc_pch ( void )

extern

Return a new ggc_pch_data structure.

References init_ggc_pch().

Referenced by gt_pch_save(), and init_ggc_pch().

Data Structures

Functions

Function Documentation

◆ ggc_free_overhead()

◆ ggc_get_size()

◆ ggc_mark_roots()

◆ ggc_mark_stringpool()

◆ ggc_pch_alloc_object()

◆ ggc_pch_count_object()

◆ ggc_pch_finish()

◆ ggc_pch_prepare_write()

◆ ggc_pch_read()

◆ ggc_pch_this_base()

◆ ggc_pch_total_size()

◆ ggc_pch_write_object()

◆ ggc_print_common_statistics()

◆ ggc_prune_overhead_list()

◆ ggc_purge_stringpool()

◆ ggc_record_overhead()

◆ gt_pch_fixup_stringpool()

◆ gt_pch_p_S()

◆ gt_pch_restore_stringpool()

◆ gt_pch_save_stringpool()

◆ init_ggc_pch()