/* Garbage collection for the GNU compiler.
- Copyright (C) 1998, 1999, 2000 Free Software Foundation, Inc.
+ Copyright (C) 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
- This file is part of GNU CC.
+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 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.
+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. */
+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. */
-/* Language-specific code defines this variable to be either one (if
- it wants garbage collection), or zero (if it does not). */
-extern int ggc_p;
-
/* 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
struct expr_status;
struct hash_table;
struct label_node;
+struct rtx_def;
struct rtvec_def;
struct stmt_status;
union tree_node;
struct varasm_status;
-struct varray_head_tag;
/* Constants for general use. */
-extern char *empty_string;
+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_string_root PARAMS ((char **, 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));
extern void ggc_mark_rtx_children PARAMS ((struct rtx_def *));
extern void ggc_mark_rtvec_children PARAMS ((struct rtvec_def *));
-extern void ggc_mark_tree_children PARAMS ((union tree_node *));
/* If EXPR is not NULL and previously unmarked, mark it and evaluate
to true. Otherwise evaluate to false. */
ggc_mark_rtx_children (r__); \
} while (0)
-#define ggc_mark_tree(EXPR) \
- do { \
- tree t__ = (EXPR); \
- if (ggc_test_and_set_mark (t__)) \
- ggc_mark_tree_children (t__); \
+#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) \
ggc_mark_rtvec_children (v__); \
} while (0)
-#define ggc_mark_string(EXPR) \
- do { \
- char *s__ = (EXPR); \
- if (s__ != NULL) \
- ggc_set_mark (s__); \
- } while (0)
-
#define ggc_mark(EXPR) \
do { \
- void *a__ = (EXPR); \
+ 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 ((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. */
/* Allocation. */
/* The internal primitive. */
-void *ggc_alloc_obj PARAMS ((size_t, int));
+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_obj (sizeof (struct rtx_def) \
- + ((NSLOTS) - 1) * sizeof (rtunion), 1))
+#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_obj (sizeof (struct rtvec_def) \
- + ((NELT) - 1) * sizeof (rtx), 1))
+ ((struct rtvec_def *) ggc_alloc (sizeof (struct rtvec_def) \
+ + ((NELT) - 1) * sizeof (rtx)))
-#define ggc_alloc_tree(LENGTH) \
- ((union tree_node *) ggc_alloc_obj ((LENGTH), 1))
+#define ggc_alloc_tree(LENGTH) ((union tree_node *) ggc_alloc (LENGTH))
-#define ggc_alloc(SIZE) ggc_alloc_obj((SIZE), 0)
+/* 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));
-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. */
+/* Invoke the collector. Garbage collection occurs only when this
+ function is called, not during allocations. */
void ggc_collect PARAMS ((void));
/* Actually set the mark on a particular region of memory, but don't
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 ((void *));
+int ggc_set_mark PARAMS ((const void *));
/* Callbacks to the languages. */
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. Each front-end should define this
- function appropriately. */
-void lang_mark_false_label_stack PARAMS ((struct label_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. */
} ggc_statistics;
/* Return the number of bytes allocated at the indicated address. */
-size_t ggc_get_size PARAMS ((void *));
+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_statistics PARAMS ((FILE *, ggc_statistics *));
+void ggc_print_common_statistics PARAMS ((FILE *, ggc_statistics *));
/* Print allocation statistics. */
-extern void ggc_page_print_statistics PARAMS ((void));
+extern void ggc_print_statistics PARAMS ((void));
+void stringpool_statistics PARAMS ((void));
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