a8a05998de
* ggc.h: Delete ggc_add_string_root and ggc_mark_string. Add
digit_vector and digit_string.
* stringpool.c (digit_vector): New.
(ggc_alloc_string): Use digit_string.
* stmt.c (digit_strings): Delete.
(init_stmt): Do not initialize digit_strings.
(expand_asm_operands): Use ggc.h's digit_string macro.
* toplev.c (mark_file_stack): Delete.
(compile_file): Don't call init_tree_codes.
(main): No need to make the file stack a GC root.
* tree.c (init_tree_codes): Delete.
* tree.h (init_tree_codes): Delete.
* c-lex.c: Don't include ggc.h.
(mark_splay_tree_node, mark_splay_tree): Delete.
(init_c_lex): No need to ggc_strdup string constant. Don't add
file_info_tree to GGC roots.
(cb_enter_file, cb_rename_file): No need to ggc_strdup
ip->nominal_fname.
* Makefile.in (c-lex.o): No longer depends on $(GGC_H).
* dbxout.c (dbxout_init),
dwarf2out.c (dwarf2out_line),
ggc-common.c (ggc_mark_rtx_children, ggc_mark_trees),
varasm.c (mark_const_hash_entry, mark_pool_constant, init_varasm_once),
xcoffout.c (xcoffout_source_file),
i386.c (load_pic_register):
Delete call(s) to ggc_add_string_root and/or ggc_mark_string.
* except.c (create_rethrow_ref),
profile.c (init_edge_profiler),
toplev.c (compile_file),
varasm.c (named_section, assemble_static_space,
assemble_trampoline_template, output_constant_def, force_const_mem),
i386.c (load_pic_register),
ia64.c (ia64_encode_section_info),
rs6000.c (rs6000_emit_load_toc_table, create_TOC_reference,
rs6000_emit_prologue, rs6000_emit_epilogue),
rs6000.md (load_toc_aix_si, load_toc_aix_di):
Change ggc_alloc_string (var, -1) to ggc_strdup (var).
* profile.c (output_func_start_profiler),
tree.c (make_node),
i386.c (load_pic_register): No need to ggc_strdup string constant.
cp:
* lex.c (mark_impl_file_chain): Delete.
(init_parse): Remove call to ggc_add_string_root. No need to
ggc_strdup a string constant. Do not add impl_file_chain to GC
roots.
(handle_pragma_implementation): No need to ggc_strdup main_filename.
f:
* lex.c (ffelex_hash_): Change ggc_alloc_string (var, -1) to
ggc_strdup (var).
java:
* parse.y (goal): Remove call to ggc_add_string_root.
From-SVN: r37522
212 lines
7.9 KiB
C
212 lines
7.9 KiB
C
/* Garbage collection for the GNU compiler.
|
|
Copyright (C) 1998, 1999, 2000 Free Software Foundation, Inc.
|
|
|
|
This file is part of GNU CC.
|
|
|
|
GNU CC 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 2, or (at your option) any
|
|
later version.
|
|
|
|
GNU CC 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 GNU CC; see the file COPYING. If not, write to the Free
|
|
Software Foundation, 59 Temple Place - Suite 330, Boston, MA
|
|
02111-1307, USA. */
|
|
|
|
#include "gansidecl.h"
|
|
#include "varray.h"
|
|
|
|
/* Symbols are marked with `ggc' for `gcc gc' so as not to interfere with
|
|
an external gc library that might be linked in. */
|
|
|
|
/* These structures are defined in various headers throughout the
|
|
compiler. However, rather than force everyone who includes this
|
|
header to include all the headers in which they are declared, we
|
|
just forward-declare them here. */
|
|
struct eh_status;
|
|
struct emit_status;
|
|
struct expr_status;
|
|
struct hash_table;
|
|
struct label_node;
|
|
struct rtx_def;
|
|
struct rtvec_def;
|
|
struct stmt_status;
|
|
union tree_node;
|
|
struct varasm_status;
|
|
|
|
/* Constants for general use. */
|
|
extern const char empty_string[]; /* empty string */
|
|
extern const char digit_vector[]; /* "0" .. "9" */
|
|
#define digit_string(d) (digit_vector + ((d) * 2))
|
|
|
|
/* Trees that have been marked, but whose children still need marking. */
|
|
extern varray_type ggc_pending_trees;
|
|
|
|
/* Manipulate global roots that are needed between calls to gc. */
|
|
void ggc_add_root PARAMS ((void *base, int nelt, int size, void (*)(void *)));
|
|
void ggc_add_rtx_root PARAMS ((struct rtx_def **, int nelt));
|
|
void ggc_add_tree_root PARAMS ((union tree_node **, int nelt));
|
|
void ggc_add_rtx_varray_root PARAMS ((struct varray_head_tag **, int nelt));
|
|
void ggc_add_tree_varray_root PARAMS ((struct varray_head_tag **, int nelt));
|
|
void ggc_add_tree_hash_table_root PARAMS ((struct hash_table **, int nelt));
|
|
void ggc_del_root PARAMS ((void *base));
|
|
|
|
/* Mark nodes from the gc_add_root callback. These functions follow
|
|
pointers to mark other objects too. */
|
|
extern void ggc_mark_rtx_varray PARAMS ((struct varray_head_tag *));
|
|
extern void ggc_mark_tree_varray PARAMS ((struct varray_head_tag *));
|
|
extern void ggc_mark_tree_hash_table PARAMS ((struct hash_table *));
|
|
extern void ggc_mark_roots PARAMS ((void));
|
|
|
|
extern void ggc_mark_rtx_children PARAMS ((struct rtx_def *));
|
|
extern void ggc_mark_rtvec_children PARAMS ((struct rtvec_def *));
|
|
|
|
/* 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 && ! ggc_set_mark (EXPR))
|
|
|
|
#define ggc_mark_rtx(EXPR) \
|
|
do { \
|
|
rtx r__ = (EXPR); \
|
|
if (ggc_test_and_set_mark (r__)) \
|
|
ggc_mark_rtx_children (r__); \
|
|
} while (0)
|
|
|
|
#define ggc_mark_tree(EXPR) \
|
|
do { \
|
|
tree t__ = (EXPR); \
|
|
if (ggc_test_and_set_mark (t__)) \
|
|
VARRAY_PUSH_TREE (ggc_pending_trees, t__); \
|
|
} while (0)
|
|
|
|
#define ggc_mark_rtvec(EXPR) \
|
|
do { \
|
|
rtvec v__ = (EXPR); \
|
|
if (ggc_test_and_set_mark (v__)) \
|
|
ggc_mark_rtvec_children (v__); \
|
|
} while (0)
|
|
|
|
#define ggc_mark(EXPR) \
|
|
do { \
|
|
const void *a__ = (EXPR); \
|
|
if (a__ != NULL) \
|
|
ggc_set_mark (a__); \
|
|
} while (0)
|
|
|
|
/* Mark, but only if it was allocated in collectable memory. */
|
|
extern void ggc_mark_if_gcable PARAMS ((const void *));
|
|
|
|
/* A GC implementation must provide these functions. */
|
|
|
|
/* Initialize the garbage collector. */
|
|
extern void init_ggc PARAMS ((void));
|
|
extern void init_stringpool PARAMS ((void));
|
|
|
|
/* Start a new GGC context. Memory allocated in previous contexts
|
|
will not be collected while the new context is active. */
|
|
extern void ggc_push_context PARAMS ((void));
|
|
|
|
/* Finish a GC context. Any uncollected memory in the new context
|
|
will be merged with the old context. */
|
|
extern void ggc_pop_context PARAMS ((void));
|
|
|
|
/* Allocation. */
|
|
|
|
/* The internal primitive. */
|
|
void *ggc_alloc PARAMS ((size_t));
|
|
/* Like ggc_alloc, but allocates cleared memory. */
|
|
void *ggc_alloc_cleared PARAMS ((size_t));
|
|
|
|
#define ggc_alloc_rtx(NSLOTS) \
|
|
((struct rtx_def *) ggc_alloc (sizeof (struct rtx_def) \
|
|
+ ((NSLOTS) - 1) * sizeof (rtunion)))
|
|
|
|
#define ggc_alloc_rtvec(NELT) \
|
|
((struct rtvec_def *) ggc_alloc (sizeof (struct rtvec_def) \
|
|
+ ((NELT) - 1) * sizeof (rtx)))
|
|
|
|
#define ggc_alloc_tree(LENGTH) ((union tree_node *) ggc_alloc (LENGTH))
|
|
|
|
/* 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. */
|
|
const char *ggc_alloc_string PARAMS ((const char *contents, int length));
|
|
|
|
/* Make a copy of S, in GC-able memory. */
|
|
#define ggc_strdup(S) ggc_alloc_string((S), -1)
|
|
|
|
/* Invoke the collector. This is really just a hint, but in the case of
|
|
the simple collector, the only time it will happen. */
|
|
void ggc_collect PARAMS ((void));
|
|
|
|
/* 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; non-zero if
|
|
the object was already marked, or if, for any other reason,
|
|
pointers in this data structure should not be traversed. */
|
|
int ggc_set_mark PARAMS ((const void *));
|
|
|
|
/* Callbacks to the languages. */
|
|
|
|
/* This is the language's opportunity to mark nodes held through
|
|
the lang_specific hooks in the tree. */
|
|
void lang_mark_tree PARAMS ((union tree_node *));
|
|
|
|
/* The FALSE_LABEL_STACK, declared in except.h, has language-dependent
|
|
semantics. If a front-end needs to mark the false label stack, it
|
|
should set this pointer to a non-NULL value. Otherwise, no marking
|
|
will be done. */
|
|
extern void (*lang_mark_false_label_stack) PARAMS ((struct label_node *));
|
|
|
|
/* Mark functions for various structs scattered about. */
|
|
|
|
void mark_eh_status PARAMS ((struct eh_status *));
|
|
void mark_emit_status PARAMS ((struct emit_status *));
|
|
void mark_expr_status PARAMS ((struct expr_status *));
|
|
void mark_stmt_status PARAMS ((struct stmt_status *));
|
|
void mark_varasm_status PARAMS ((struct varasm_status *));
|
|
void mark_optab PARAMS ((void *));
|
|
|
|
/* Statistics. */
|
|
|
|
/* This structure contains the statistics common to all collectors.
|
|
Particular collectors can extend this structure. */
|
|
typedef struct ggc_statistics
|
|
{
|
|
/* The Ith element is the number of nodes allocated with code I. */
|
|
unsigned num_trees[256];
|
|
/* The Ith element is the number of bytes allocated by nodes with
|
|
code I. */
|
|
size_t size_trees[256];
|
|
/* The Ith element is the number of nodes allocated with code I. */
|
|
unsigned num_rtxs[256];
|
|
/* The Ith element is the number of bytes allocated by nodes with
|
|
code I. */
|
|
size_t size_rtxs[256];
|
|
/* The total size of the tree nodes allocated. */
|
|
size_t total_size_trees;
|
|
/* The total size of the RTL nodes allocated. */
|
|
size_t total_size_rtxs;
|
|
/* The total number of tree nodes allocated. */
|
|
unsigned total_num_trees;
|
|
/* The total number of RTL nodes allocated. */
|
|
unsigned total_num_rtxs;
|
|
} ggc_statistics;
|
|
|
|
/* Return the number of bytes allocated at the indicated address. */
|
|
size_t ggc_get_size PARAMS ((const void *));
|
|
|
|
/* Used by the various collectors to gather and print statistics that
|
|
do not depend on the collector in use. */
|
|
void ggc_print_common_statistics PARAMS ((FILE *, ggc_statistics *));
|
|
|
|
/* Print allocation statistics. */
|
|
extern void ggc_print_statistics PARAMS ((void));
|
|
void stringpool_statistics PARAMS ((void));
|