/* Garbage collection for the GNU compiler.
- Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003
+ Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004
Free Software Foundation, Inc.
This file is part of GCC.
Software Foundation, 59 Temple Place - Suite 330, Boston, MA
02111-1307, USA. */
+#ifndef GCC_GGC_H
+#define GCC_GGC_H
+#include "statistics.h"
+
/* Symbols are marked with `ggc' for `gcc gc' so as not to interfere with
an external gc library that might be linked in. */
typedef void (*gt_pointer_walker) (void *);
/* Structures for the easy way to mark roots.
- In an array, terminated by having base == NULL.*/
+ In an array, terminated by having base == NULL. */
struct ggc_root_tab {
void *base;
size_t nelt;
extern void gt_pch_n_S (const void *);
extern void gt_ggc_m_S (void *);
-/* Initialise the string pool. */
+/* Initialize the string pool. */
extern void init_stringpool (void);
/* A GC implementation must provide these functions. They are internal
to the GC system. */
+/* Forward declare the zone structure. Only ggc_zone implements this. */
+struct alloc_zone;
+
/* Initialize the garbage collector. */
extern void init_ggc (void);
+/* Start a new GGC zone. */
+extern struct alloc_zone *new_ggc_zone (const char *);
+
+/* Free a complete GGC zone, destroying everything in it. */
+extern void destroy_ggc_zone (struct alloc_zone *);
+
/* 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 (void);
/* 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. */
-extern void ggc_pch_count_object (struct ggc_pch_data *, void *, size_t);
+ that information as is necessary. The last argument should be true
+ if the object is a string. */
+extern void ggc_pch_count_object (struct ggc_pch_data *, void *, size_t, bool);
/* Return the total size of the data to be written to hold all
the objects previously passed to ggc_pch_count_object. */
extern void ggc_pch_this_base (struct ggc_pch_data *, void *);
/* Assuming that the objects really do end up at the address
- passed to ggc_pch_this_base, return the address of this object. */
-extern char *ggc_pch_alloc_object (struct ggc_pch_data *, void *, size_t);
+ passed to ggc_pch_this_base, return the address of this object.
+ The last argument should be true if the object is a string. */
+extern char *ggc_pch_alloc_object (struct ggc_pch_data *, void *, size_t, bool);
/* Write out any initial information required. */
extern void ggc_pch_prepare_write (struct ggc_pch_data *, FILE *);
-/* Write out this object, including any padding. */
+/* Write out this object, including any padding. The last argument should be
+ true if the object is a string. */
extern void ggc_pch_write_object (struct ggc_pch_data *, FILE *, void *,
- void *, size_t);
+ void *, size_t, bool);
/* All objects have been written, write out any final information
required. */
extern void ggc_pch_finish (struct ggc_pch_data *, FILE *);
\f
/* Allocation. */
+/* For single pass garbage. */
+extern struct alloc_zone *garbage_zone;
+/* For regular rtl allocations. */
+extern struct alloc_zone *rtl_zone;
+/* For regular tree allocations. */
+extern struct alloc_zone *tree_zone;
+/* When set, ggc_collect will do collection. */
+extern bool ggc_force_collect;
+
/* The internal primitive. */
-extern void *ggc_alloc (size_t);
+extern void *ggc_alloc_stat (size_t MEM_STAT_DECL);
+#define ggc_alloc(s) ggc_alloc_stat (s MEM_STAT_INFO)
+/* Allocate an object into the specified allocation zone. */
+extern void *ggc_alloc_zone_stat (size_t, struct alloc_zone * MEM_STAT_DECL);
+#define ggc_alloc_zone(s,z) ggc_alloc_zone_stat (s,z MEM_STAT_INFO)
+/* Allocate an object of the specified type and size. */
+extern void *ggc_alloc_typed_stat (enum gt_types_enum, size_t MEM_STAT_DECL);
+#define ggc_alloc_typed(s,z) ggc_alloc_typed_stat (s,z MEM_STAT_INFO)
/* Like ggc_alloc, but allocates cleared memory. */
-extern void *ggc_alloc_cleared (size_t);
+extern void *ggc_alloc_cleared_stat (size_t MEM_STAT_DECL);
+#define ggc_alloc_cleared(s) ggc_alloc_cleared_stat (s MEM_STAT_INFO)
+/* Like ggc_alloc_zone, but allocates cleared memory. */
+extern void *ggc_alloc_cleared_zone (size_t, struct alloc_zone * MEM_STAT_DECL);
+#define ggc_alloc_cleared_zone(s,z) ggc_alloc_cleared_stat (s,z MEM_STAT_INFO)
/* Resize a block. */
-extern void *ggc_realloc (void *, size_t);
+extern void *ggc_realloc_stat (void *, size_t MEM_STAT_DECL);
+#define ggc_realloc(s,z) ggc_realloc_stat (s,z MEM_STAT_INFO)
/* Like ggc_alloc_cleared, but performs a multiplication. */
extern void *ggc_calloc (size_t, size_t);
-
-#define ggc_alloc_rtx(NSLOTS) \
- ((struct rtx_def *) ggc_alloc (sizeof (struct rtx_def) \
- + ((NSLOTS) - 1) * sizeof (rtunion)))
+/* Free a block. To be used when known for certain it's not reachable. */
+extern void ggc_free (void *);
+
+extern void ggc_record_overhead (size_t, size_t, void * MEM_STAT_DECL);
+extern void ggc_free_overhead (void *);
+extern void ggc_prune_overhead_list (void);
+
+extern void dump_ggc_loc_statistics (void);
+
+/* Type-safe, C++-friendly versions of ggc_alloc() and gcc_calloc(). */
+#define GGC_NEW(T) ((T *) ggc_alloc (sizeof (T)))
+#define GGC_CNEW(T) ((T *) ggc_alloc_cleared (sizeof (T)))
+#define GGC_NEWVEC(T, N) ((T *) ggc_alloc ((N) * sizeof(T)))
+#define GGC_CNEWVEC(T, N) ((T *) ggc_alloc_cleared ((N) * sizeof(T)))
+#define GGC_NEWVAR(T, S) ((T *) ggc_alloc ((S)))
+#define GGC_CNEWVAR(T, S) ((T *) ggc_alloc_cleared ((S)))
#define ggc_alloc_rtvec(NELT) \
- ((struct rtvec_def *) ggc_alloc (sizeof (struct rtvec_def) \
- + ((NELT) - 1) * sizeof (rtx)))
+ ((rtvec) ggc_alloc_typed (gt_ggc_e_9rtvec_def, sizeof (struct rtvec_def) \
+ + ((NELT) - 1) * sizeof (rtx)))
-#define ggc_alloc_tree(LENGTH) ((union tree_node *) ggc_alloc (LENGTH))
+#define ggc_alloc_tree(LENGTH) ((tree) ggc_alloc_zone (LENGTH, tree_zone))
#define htab_create_ggc(SIZE, HASH, EQ, DEL) \
htab_create_alloc (SIZE, HASH, EQ, DEL, ggc_calloc, NULL)
/* 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 PARAMS ((const char *contents,
- int length));
+extern const char *ggc_alloc_string (const char *contents, int length);
/* Make a copy of S, in GC-able memory. */
#define ggc_strdup(S) ggc_alloc_string((S), -1)
extern int ggc_min_expand_heuristic (void);
extern int ggc_min_heapsize_heuristic (void);
extern void init_ggc_heuristics (void);
+
+#endif
OSDN Git Service
