diff options
Diffstat (limited to 'gcc/ggc.h')
| -rw-r--r-- | gcc/ggc.h | 292 |
1 files changed, 158 insertions, 134 deletions
@@ -1,7 +1,7 @@ /* Garbage collection for the GNU compiler. Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007, - 2008, 2009 Free Software Foundation, Inc. + 2008, 2009, 2010 Free Software Foundation, Inc. This file is part of GCC. @@ -28,11 +28,9 @@ along with GCC; see the file COPYING3. If not see /* 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)) /* Internal functions and data structures used by the GTY - machinery. */ + machinery, including the generated gt*.[hc] files. */ /* The first parameter is a pointer to a pointer, the second a cookie. */ typedef void (*gt_pointer_operator) (void *, void *); @@ -118,112 +116,48 @@ extern int ggc_set_mark (const void *); static objects, stack variables, or memory allocated with malloc. */ extern int ggc_marked_p (const void *); -/* Mark the entries in the string pool. */ -extern void ggc_mark_stringpool (void); - -/* Purge the entries in the string pool. */ -extern void ggc_purge_stringpool (void); - -/* Call ggc_set_mark on all the roots. */ - -extern void ggc_mark_roots (void); - -/* Save and restore the string pool entries for PCH. */ - -extern void gt_pch_save_stringpool (void); -extern void gt_pch_fixup_stringpool (void); -extern void gt_pch_restore_stringpool (void); - /* PCH and GGC handling for strings, mostly trivial. */ - -extern void gt_pch_p_S (void *, void *, gt_pointer_operator, void *); extern void gt_pch_n_S (const void *); extern void gt_ggc_m_S (const void *); -/* Initialize the string pool. */ -extern void init_stringpool (void); +/* End of GTY machinery API. */ -/* 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 string pool. */ +extern void init_stringpool (void); + /* 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 *); - -struct ggc_pch_data; - -/* Return a new ggc_pch_data structure. */ -extern struct ggc_pch_data *init_ggc_pch (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. The bool argument should be true - if the object is a string. */ -extern void ggc_pch_count_object (struct ggc_pch_data *, void *, size_t, bool, - enum gt_types_enum); - -/* Return the total size of the data to be written to hold all - the objects previously passed to ggc_pch_count_object. */ -extern size_t ggc_pch_total_size (struct ggc_pch_data *); - -/* The objects, when read, will most likely be at the address - in the second parameter. */ -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. - The bool argument should be true if the object is a string. */ -extern char *ggc_pch_alloc_object (struct ggc_pch_data *, void *, size_t, bool, - enum gt_types_enum); - -/* Write out any initial information required. */ -extern void ggc_pch_prepare_write (struct ggc_pch_data *, FILE *); -/* 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, bool); -/* All objects have been written, write out any final information - required. */ -extern void ggc_pch_finish (struct ggc_pch_data *, FILE *); - -/* A PCH file has just been read in at the address specified second - parameter. Set up the GC implementation for the new objects. */ -extern void ggc_pch_read (FILE *, void *); - - -/* Allocation. */ - -/* When set, ggc_collect will do collection. */ -extern bool ggc_force_collect; - /* 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_alloc_stat (size_t MEM_STAT_DECL); -#define ggc_alloc(s) ggc_alloc_stat (s MEM_STAT_INFO) +extern void *ggc_internal_alloc_stat (size_t MEM_STAT_DECL); + +#define ggc_internal_alloc(s) ggc_internal_alloc_stat (s 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_stat (size_t MEM_STAT_DECL); -#define ggc_alloc_cleared(s) ggc_alloc_cleared_stat (s MEM_STAT_INFO) + +#define ggc_alloc_typed(s, z) ggc_alloc_typed_stat (s, z MEM_STAT_INFO) + +/* Allocates cleared memory. */ +extern void *ggc_internal_cleared_alloc_stat (size_t MEM_STAT_DECL); + /* Resize a block. */ 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); + /* Free a block. To be used when known for certain it's not reachable. */ extern void ggc_free (void *); @@ -233,39 +167,67 @@ extern void ggc_prune_overhead_list (void); extern void dump_ggc_loc_statistics (bool); -/* 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_RESIZEVEC(T, P, N) ((T *) ggc_realloc ((P), (N) * sizeof (T))) -#define GGC_NEWVAR(T, S) ((T *) ggc_alloc ((S))) -#define GGC_CNEWVAR(T, S) ((T *) ggc_alloc_cleared ((S))) -#define GGC_RESIZEVAR(T, P, N) ((T *) ggc_realloc ((P), (N))) +/* Reallocators. */ +#define GGC_RESIZEVEC(T, P, N) \ + ((T *) ggc_realloc_stat ((P), (N) * sizeof (T) MEM_STAT_INFO)) + +#define GGC_RESIZEVAR(T, P, N) \ + ((T *) ggc_realloc_stat ((P), (N) MEM_STAT_INFO)) + +static inline void * +ggc_internal_vec_alloc_stat (size_t s, size_t c MEM_STAT_DECL) +{ + return ggc_internal_alloc_stat (c * s PASS_MEM_STAT); +} + +static inline void * +ggc_internal_cleared_vec_alloc_stat (size_t s, size_t c MEM_STAT_DECL) +{ + return ggc_internal_cleared_alloc_stat (c * s PASS_MEM_STAT); +} + +#define ggc_internal_cleared_vec_alloc(s, c) \ + (ggc_internal_cleared_vec_alloc_stat ((s), (c) MEM_STAT_INFO)) + +static inline void * +ggc_alloc_atomic_stat (size_t s MEM_STAT_DECL) +{ + return ggc_internal_alloc_stat (s PASS_MEM_STAT); +} + +#define ggc_alloc_atomic(S) (ggc_alloc_atomic_stat ((S) MEM_STAT_INFO)) + +#define ggc_alloc_cleared_atomic(S) \ + (ggc_internal_cleared_alloc_stat ((S) MEM_STAT_INFO)) -#define ggc_alloc_rtvec(NELT) \ - ((rtvec) ggc_alloc_zone (sizeof (struct rtvec_def) + ((NELT) - 1) \ - * sizeof (rtx), &rtl_zone)) +extern void * ggc_cleared_alloc_htab_ignore_args (size_t, size_t); -#define ggc_alloc_tree(LENGTH) ((tree) ggc_alloc_zone (LENGTH, &tree_zone)) +extern void * ggc_cleared_alloc_ptr_array_two_args (size_t, size_t); #define htab_create_ggc(SIZE, HASH, EQ, DEL) \ - htab_create_alloc (SIZE, HASH, EQ, DEL, ggc_calloc, ggc_free) + htab_create_typed_alloc (SIZE, HASH, EQ, DEL, \ + ggc_cleared_alloc_htab_ignore_args, \ + ggc_cleared_alloc_ptr_array_two_args, \ + ggc_free) + +#define splay_tree_new_ggc(COMPARE, ALLOC_TREE, ALLOC_NODE) \ + splay_tree_new_typed_alloc (COMPARE, NULL, NULL, &ALLOC_TREE, &ALLOC_NODE, \ + &ggc_splay_dont_free, NULL) + +extern void *ggc_splay_alloc (enum gt_types_enum, int, void *); -#define splay_tree_new_ggc(COMPARE) \ - splay_tree_new_with_allocator (COMPARE, NULL, NULL, \ - &ggc_splay_alloc, &ggc_splay_dont_free, \ - NULL) -extern void *ggc_splay_alloc (int, void *); extern void ggc_splay_dont_free (void *, void *); /* 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); +extern const char *ggc_alloc_string_stat (const char *contents, int length + MEM_STAT_DECL); + +#define ggc_alloc_string(c, l) ggc_alloc_string_stat (c, l MEM_STAT_INFO) /* Make a copy of S, in GC-able memory. */ -#define ggc_strdup(S) ggc_alloc_string((S), -1) +#define ggc_strdup(S) ggc_alloc_string_stat ((S), -1 MEM_STAT_INFO) /* Invoke the collector. Garbage collection occurs only when this function is called, not during allocations. */ @@ -279,55 +241,117 @@ extern void ggc_register_root_tab (const struct ggc_root_tab *); plugins. Does nothing if the passed pointer is NULL. */ extern void ggc_register_cache_tab (const struct ggc_cache_tab *); -/* Return the number of bytes allocated at the indicated address. */ -extern size_t ggc_get_size (const void *); - -/* Write out all GCed objects to F. */ -extern void gt_pch_save (FILE *f); - /* Read objects previously saved with gt_pch_save from F. */ extern void gt_pch_restore (FILE *f); /* Statistics. */ -/* This structure contains the statistics common to all collectors. - Particular collectors can extend this structure. */ -typedef struct ggc_statistics -{ - /* At present, we don't really gather any interesting statistics. */ - int unused; -} ggc_statistics; - -/* Used by the various collectors to gather and print statistics that - do not depend on the collector in use. */ -extern void ggc_print_common_statistics (FILE *, ggc_statistics *); - /* Print allocation statistics. */ extern void ggc_print_statistics (void); + extern void stringpool_statistics (void); /* Heuristics. */ extern void init_ggc_heuristics (void); /* Zone collection. */ -#if defined (GGC_ZONE) && !defined (GENERATOR_FILE) /* For regular rtl allocations. */ extern struct alloc_zone rtl_zone; + /* For regular tree allocations. */ extern struct alloc_zone tree_zone; + /* For IDENTIFIER_NODE allocations. */ extern struct alloc_zone tree_id_zone; +#define ggc_alloc_rtvec_sized(NELT) \ + (ggc_alloc_zone_vec_rtvec_def (sizeof (rtx), \ + sizeof (struct rtvec_def) + ((NELT) - 1), \ + &rtl_zone)) + +#if defined (GGC_ZONE) && !defined (GENERATOR_FILE) + /* 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) -# define ggc_alloc_zone_pass_stat(s,z) ggc_alloc_zone_stat (s,z PASS_MEM_STAT) +extern void *ggc_internal_alloc_zone_stat (size_t, + struct alloc_zone * MEM_STAT_DECL); + +extern void *ggc_internal_cleared_alloc_zone_stat (size_t, + struct alloc_zone * MEM_STAT_DECL); + +static inline void * +ggc_internal_zone_alloc_stat (struct alloc_zone * z, size_t s MEM_STAT_DECL) +{ + return ggc_internal_alloc_zone_stat (s, z PASS_MEM_STAT); +} + +static inline void * +ggc_internal_zone_cleared_alloc_stat (struct alloc_zone * z, size_t s + MEM_STAT_DECL) +{ + return ggc_internal_cleared_alloc_zone_stat (s, z PASS_MEM_STAT); +} + +static inline void * +ggc_internal_zone_vec_alloc_stat (struct alloc_zone * z, size_t s, size_t n + MEM_STAT_DECL) +{ + return ggc_internal_alloc_zone_stat (s * n, z PASS_MEM_STAT); +} + + #else -# define ggc_alloc_zone(s, z) ggc_alloc (s) -# define ggc_alloc_zone_pass_stat(s, z) ggc_alloc_stat (s PASS_MEM_STAT) +static inline void * +ggc_internal_zone_alloc_stat (struct alloc_zone * z ATTRIBUTE_UNUSED, + size_t s MEM_STAT_DECL) +{ + return ggc_internal_alloc_stat (s PASS_MEM_STAT); +} + +static inline void * +ggc_internal_zone_cleared_alloc_stat (struct alloc_zone * z ATTRIBUTE_UNUSED, + size_t s MEM_STAT_DECL) +{ + return ggc_internal_cleared_alloc_stat (s PASS_MEM_STAT); +} + +static inline void * +ggc_internal_zone_vec_alloc_stat (struct alloc_zone * z ATTRIBUTE_UNUSED, + size_t s, size_t n MEM_STAT_DECL) +{ + return ggc_internal_vec_alloc_stat (s, n PASS_MEM_STAT); +} #endif +/* 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_zone_rtx_def_stat (struct alloc_zone * z, size_t s MEM_STAT_DECL) +{ + return (struct rtx_def *) ggc_internal_zone_alloc_stat (z, s PASS_MEM_STAT); +} + +static inline union tree_node * +ggc_alloc_zone_tree_node_stat (struct alloc_zone * z, size_t s MEM_STAT_DECL) +{ + return (union tree_node *) ggc_internal_zone_alloc_stat (z, s PASS_MEM_STAT); +} + +static inline union tree_node * +ggc_alloc_zone_cleared_tree_node_stat (struct alloc_zone * z, size_t s + MEM_STAT_DECL) +{ + return (union tree_node *) + ggc_internal_zone_cleared_alloc_stat (z, s PASS_MEM_STAT); +} + +static inline union gimple_statement_d * +ggc_alloc_cleared_gimple_statement_d_stat (size_t s MEM_STAT_DECL) +{ + return (union gimple_statement_d *) + ggc_internal_cleared_alloc_stat (s PASS_MEM_STAT); +} + #endif |