-/* Copyright (C) 1995, 96, 97, 98, 99, 2000 Free Software Foundation, Inc.
+/* Copyright (C) 1995,1996,1997,1998,1999,2000,2001 Free Software Foundation, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
/* #define DEBUGINFO */
+/* SECTION: This code is compiled once.
+ */
+
+#ifndef MARK_DEPENDENCIES
+
\f
#include <stdio.h>
+#include <errno.h>
+#include <string.h>
+
#include "libguile/_scm.h"
#include "libguile/eval.h"
#include "libguile/stime.h"
#include "libguile/vectors.h"
#include "libguile/weaks.h"
#include "libguile/hashtab.h"
+#include "libguile/tags.h"
#include "libguile/validate.h"
#include "libguile/gc.h"
#endif
\f
+
+unsigned int scm_gc_running_p = 0;
+
+\f
+
+#if (SCM_DEBUG_CELL_ACCESSES == 1)
+
+scm_bits_t scm_tc16_allocated;
+
+/* Set this to != 0 if every cell that is accessed shall be checked:
+ */
+unsigned int scm_debug_cell_accesses_p = 1;
+
+
+/* Assert that the given object is a valid reference to a valid cell. This
+ * test involves to determine whether the object is a cell pointer, whether
+ * this pointer actually points into a heap segment and whether the cell
+ * pointed to is not a free cell.
+ */
+void
+scm_assert_cell_valid (SCM cell)
+{
+ static unsigned int already_running = 0;
+
+ if (scm_debug_cell_accesses_p && !already_running)
+ {
+ already_running = 1; /* set to avoid recursion */
+
+ if (!scm_cellp (cell))
+ {
+ fprintf (stderr, "scm_assert_cell_valid: Not a cell object: %lx\n", SCM_UNPACK (cell));
+ abort ();
+ }
+ else if (!scm_gc_running_p)
+ {
+ /* Dirk::FIXME:: During garbage collection there occur references to
+ free cells. This is allright during conservative marking, but
+ should not happen otherwise (I think). The case of free cells
+ accessed during conservative marking is handled in function
+ scm_mark_locations. However, there still occur accesses to free
+ cells during gc. I don't understand why this happens. If it is
+ a bug and gets fixed, the following test should also work while
+ gc is running.
+ */
+ if (SCM_FREE_CELL_P (cell))
+ {
+ fprintf (stderr, "scm_assert_cell_valid: Accessing free cell: %lx\n", SCM_UNPACK (cell));
+ abort ();
+ }
+ }
+ already_running = 0; /* re-enable */
+ }
+}
+
+
+SCM_DEFINE (scm_set_debug_cell_accesses_x, "set-debug-cell-accesses!", 1, 0, 0,
+ (SCM flag),
+ "If @var{flag} is @code{#f}, cell access checking is disabled.\n"
+ "If @var{flag} is @code{#t}, cell access checking is enabled.\n"
+ "This procedure only exists when the compile-time flag\n"
+ "@code{SCM_DEBUG_CELL_ACCESSES} was set to 1.")
+#define FUNC_NAME s_scm_set_debug_cell_accesses_x
+{
+ if (SCM_FALSEP (flag)) {
+ scm_debug_cell_accesses_p = 0;
+ } else if (SCM_EQ_P (flag, SCM_BOOL_T)) {
+ scm_debug_cell_accesses_p = 1;
+ } else {
+ SCM_WRONG_TYPE_ARG (1, flag);
+ }
+ return SCM_UNSPECIFIED;
+}
+#undef FUNC_NAME
+
+#endif /* SCM_DEBUG_CELL_ACCESSES == 1 */
+
+\f
+
/* {heap tuning parameters}
*
* These are parameters for controlling memory allocation. The heap
* large heaps, especially if code behaviour is varying its
* maximum consumption between different freelists.
*/
-int scm_default_init_heap_size_1 = (45000L * sizeof (scm_cell));
+
+#define SCM_DATA_CELLS2CARDS(n) (((n) + SCM_GC_CARD_N_DATA_CELLS - 1) / SCM_GC_CARD_N_DATA_CELLS)
+#define SCM_CARDS_PER_CLUSTER SCM_DATA_CELLS2CARDS (2000L)
+#define SCM_CLUSTER_SIZE_1 (SCM_CARDS_PER_CLUSTER * SCM_GC_CARD_N_DATA_CELLS)
+int scm_default_init_heap_size_1 = (((SCM_DATA_CELLS2CARDS (45000L) + SCM_CARDS_PER_CLUSTER - 1)
+ / SCM_CARDS_PER_CLUSTER) * SCM_GC_CARD_SIZE);
int scm_default_min_yield_1 = 40;
-#define SCM_CLUSTER_SIZE_1 2000L
-int scm_default_init_heap_size_2 = (2500L * 2 * sizeof (scm_cell));
+#define SCM_CLUSTER_SIZE_2 (SCM_CARDS_PER_CLUSTER * (SCM_GC_CARD_N_DATA_CELLS / 2))
+int scm_default_init_heap_size_2 = (((SCM_DATA_CELLS2CARDS (2500L * 2) + SCM_CARDS_PER_CLUSTER - 1)
+ / SCM_CARDS_PER_CLUSTER) * SCM_GC_CARD_SIZE);
/* The following value may seem large, but note that if we get to GC at
* all, this means that we have a numerically intensive application
*/
int scm_default_min_yield_2 = 40;
-#define SCM_CLUSTER_SIZE_2 1000L
int scm_default_max_segment_size = 2097000L;/* a little less (adm) than 2 Mb */
-#define SCM_MIN_HEAP_SEG_SIZE (2048L * sizeof (scm_cell))
+#define SCM_MIN_HEAP_SEG_SIZE (8 * SCM_GC_CARD_SIZE)
#ifdef _QC
# define SCM_HEAP_SEG_SIZE 32768L
#else
#define SCM_INIT_MALLOC_LIMIT 100000
#define SCM_MTRIGGER_HYSTERESIS (SCM_INIT_MALLOC_LIMIT/10)
-/* CELL_UP and CELL_DN are used by scm_init_heap_seg to find scm_cell aligned inner
- bounds for allocated storage */
+/* CELL_UP and CELL_DN are used by scm_init_heap_seg to find (scm_cell * span)
+ aligned inner bounds for allocated storage */
#ifdef PROT386
/*in 386 protected mode we must only adjust the offset */
# define CELL_DN(p, span) (SCM_CELLPTR)(~(sizeof(scm_cell)*(span)-1L) & (long)(p))
# endif /* UNICOS */
#endif /* PROT386 */
-#define CLUSTER_SIZE_IN_BYTES(freelist) ((freelist)->cluster_size * (freelist)->span * sizeof(scm_cell))
-#define ALIGNMENT_SLACK(freelist) (sizeof (scm_cell) * (freelist)->span - 1)
-#define SCM_HEAP_SIZE \
- (scm_master_freelist.heap_size + scm_master_freelist2.heap_size)
-#define SCM_MAX(A, B) ((A) > (B) ? (A) : (B))
+#define DOUBLECELL_ALIGNED_P(x) (((2 * sizeof (scm_cell) - 1) & SCM_UNPACK (x)) == 0)
+
+#define ALIGNMENT_SLACK(freelist) (SCM_GC_CARD_SIZE - 1)
+#define CLUSTER_SIZE_IN_BYTES(freelist) \
+ (((freelist)->cluster_size / (SCM_GC_CARD_N_DATA_CELLS / (freelist)->span)) * SCM_GC_CARD_SIZE)
\f
/* scm_freelists
*/
unsigned long scm_mtrigger;
-
/* scm_gc_heap_lock
* If set, don't expand the heap. Set only during gc, during which no allocation
* is supposed to take place anyway.
*/
SCM scm_weak_vectors;
+/* During collection, this accumulates structures which are to be freed.
+ */
+SCM scm_structs_to_free;
+
/* GC Statistics Keeping
*/
unsigned long scm_cells_allocated = 0;
static unsigned long scm_gc_yield_1 = 0; /* previous GC yield */
unsigned long scm_gc_malloc_collected;
unsigned long scm_gc_ports_collected;
-unsigned long scm_gc_rt;
unsigned long scm_gc_time_taken = 0;
+static unsigned long t_before_gc;
+static unsigned long t_before_sweep;
+unsigned long scm_gc_mark_time_taken = 0;
+unsigned long scm_gc_sweep_time_taken = 0;
+unsigned long scm_gc_times = 0;
+unsigned long scm_gc_cells_swept = 0;
+double scm_gc_cells_marked_acc = 0.;
+double scm_gc_cells_swept_acc = 0.;
SCM_SYMBOL (sym_cells_allocated, "cells-allocated");
SCM_SYMBOL (sym_heap_size, "cell-heap-size");
SCM_SYMBOL (sym_mtrigger, "gc-malloc-threshold");
SCM_SYMBOL (sym_heap_segments, "cell-heap-segments");
SCM_SYMBOL (sym_gc_time_taken, "gc-time-taken");
+SCM_SYMBOL (sym_gc_mark_time_taken, "gc-mark-time-taken");
+SCM_SYMBOL (sym_gc_sweep_time_taken, "gc-sweep-time-taken");
+SCM_SYMBOL (sym_times, "gc-times");
+SCM_SYMBOL (sym_cells_marked, "cells-marked");
+SCM_SYMBOL (sym_cells_swept, "cells-swept");
typedef struct scm_heap_seg_data_t
{
static void alloc_some_heap (scm_freelist_t *, policy_on_error);
+#define SCM_HEAP_SIZE \
+ (scm_master_freelist.heap_size + scm_master_freelist2.heap_size)
+#define SCM_MAX(A, B) ((A) > (B) ? (A) : (B))
+
+#define BVEC_GROW_SIZE 256
+#define BVEC_GROW_SIZE_IN_LIMBS (SCM_GC_CARD_BVEC_SIZE_IN_LIMBS * BVEC_GROW_SIZE)
+#define BVEC_GROW_SIZE_IN_BYTES (BVEC_GROW_SIZE_IN_LIMBS * sizeof (scm_c_bvec_limb_t))
+
+/* mark space allocation */
+
+typedef struct scm_mark_space_t
+{
+ scm_c_bvec_limb_t *bvec_space;
+ struct scm_mark_space_t *next;
+} scm_mark_space_t;
+
+static scm_mark_space_t *current_mark_space;
+static scm_mark_space_t **mark_space_ptr;
+static int current_mark_space_offset;
+static scm_mark_space_t *mark_space_head;
+
+static scm_c_bvec_limb_t *
+get_bvec ()
+#define FUNC_NAME "get_bvec"
+{
+ scm_c_bvec_limb_t *res;
+
+ if (!current_mark_space)
+ {
+ SCM_SYSCALL (current_mark_space = (scm_mark_space_t *) malloc (sizeof (scm_mark_space_t)));
+ if (!current_mark_space)
+ SCM_MISC_ERROR ("could not grow heap", SCM_EOL);
+
+ current_mark_space->bvec_space = NULL;
+ current_mark_space->next = NULL;
+
+ *mark_space_ptr = current_mark_space;
+ mark_space_ptr = &(current_mark_space->next);
+
+ return get_bvec ();
+ }
+
+ if (!(current_mark_space->bvec_space))
+ {
+ SCM_SYSCALL (current_mark_space->bvec_space =
+ (scm_c_bvec_limb_t *) calloc (BVEC_GROW_SIZE_IN_BYTES, 1));
+ if (!(current_mark_space->bvec_space))
+ SCM_MISC_ERROR ("could not grow heap", SCM_EOL);
+
+ current_mark_space_offset = 0;
+
+ return get_bvec ();
+ }
+
+ if (current_mark_space_offset == BVEC_GROW_SIZE_IN_LIMBS)
+ {
+ current_mark_space = NULL;
+
+ return get_bvec ();
+ }
+
+ res = current_mark_space->bvec_space + current_mark_space_offset;
+ current_mark_space_offset += SCM_GC_CARD_BVEC_SIZE_IN_LIMBS;
+
+ return res;
+}
+#undef FUNC_NAME
+
+
+static void
+clear_mark_space ()
+{
+ scm_mark_space_t *ms;
+
+ for (ms = mark_space_head; ms; ms = ms->next)
+ memset (ms->bvec_space, 0, BVEC_GROW_SIZE_IN_BYTES);
+}
+
+
\f
/* Debugging functions. */
SCM_DEFINE (scm_map_free_list, "map-free-list", 0, 0, 0,
(),
- "Print debugging information about the free-list.\n"
- "`map-free-list' is only included in --enable-guile-debug builds of Guile.")
+ "Print debugging information about the free-list.\n"
+ "@code{map-free-list} is only included in\n"
+ "@code{--enable-guile-debug} builds of Guile.")
#define FUNC_NAME s_scm_map_free_list
{
int i;
SCM_DEFINE (scm_free_list_length, "free-list-length", 0, 0, 0,
(),
- "Print debugging information about the free-list.\n"
- "`free-list-length' is only included in --enable-guile-debug builds of Guile.")
+ "Print debugging information about the free-list.\n"
+ "@code{free-list-length} is only included in\n"
+ "@code{--enable-guile-debug} builds of Guile.")
#define FUNC_NAME s_scm_free_list_length
{
free_list_lengths ("1-cells", &scm_master_freelist, scm_freelist);
#ifdef GUILE_DEBUG_FREELIST
+/* Non-zero if freelist debugging is in effect. Set this via
+ `gc-set-debug-check-freelist!'. */
+static int scm_debug_check_freelist = 0;
+
/* Number of calls to SCM_NEWCELL since startup. */
static unsigned long scm_newcell_count;
static unsigned long scm_newcell2_count;
}
}
-static int scm_debug_check_freelist = 0;
-
SCM_DEFINE (scm_gc_set_debug_check_freelist_x, "gc-set-debug-check-freelist!", 1, 0, 0,
(SCM flag),
- "If FLAG is #t, check the freelist for consistency on each cell allocation.\n"
- "This procedure only exists because the GUILE_DEBUG_FREELIST \n"
- "compile-time flag was selected.\n")
+ "If @var{flag} is @code{#t}, check the freelist for consistency\n"
+ "on each cell allocation. This procedure only exists when the\n"
+ "@code{GUILE_DEBUG_FREELIST} compile-time flag was selected.")
#define FUNC_NAME s_scm_gc_set_debug_check_freelist_x
{
+ /* [cmm] I did a double-take when I read this code the first time.
+ well, FWIW. */
SCM_VALIDATE_BOOL_COPY (1, flag, scm_debug_check_freelist);
return SCM_UNSPECIFIED;
}
{
new = scm_freelist;
scm_freelist = SCM_FREE_CELL_CDR (scm_freelist);
- SCM_SET_FREE_CELL_TYPE (new, scm_tc16_allocated);
}
return new;
{
new = scm_freelist2;
scm_freelist2 = SCM_FREE_CELL_CDR (scm_freelist2);
- SCM_SET_FREE_CELL_TYPE (new, scm_tc16_allocated);
}
return new;
static unsigned long
master_cells_allocated (scm_freelist_t *master)
{
+ /* the '- 1' below is to ignore the cluster spine cells. */
int objects = master->clusters_allocated * (master->cluster_size - 1);
if (SCM_NULLP (master->clusters))
objects -= master->left_to_collect;
SCM_DEFINE (scm_gc_stats, "gc-stats", 0, 0, 0,
(),
- "Returns an association list of statistics about Guile's current use of storage. ")
+ "Return an association list of statistics about Guile's current\n"
+ "use of storage.")
#define FUNC_NAME s_scm_gc_stats
{
int i;
long int local_scm_heap_size;
long int local_scm_cells_allocated;
long int local_scm_gc_time_taken;
+ long int local_scm_gc_times;
+ long int local_scm_gc_mark_time_taken;
+ long int local_scm_gc_sweep_time_taken;
+ double local_scm_gc_cells_swept;
+ double local_scm_gc_cells_marked;
SCM answer;
SCM_DEFER_INTS;
local_scm_heap_size = SCM_HEAP_SIZE;
local_scm_cells_allocated = compute_cells_allocated ();
local_scm_gc_time_taken = scm_gc_time_taken;
+ local_scm_gc_mark_time_taken = scm_gc_mark_time_taken;
+ local_scm_gc_sweep_time_taken = scm_gc_sweep_time_taken;
+ local_scm_gc_times = scm_gc_times;
+ local_scm_gc_cells_swept = scm_gc_cells_swept_acc;
+ local_scm_gc_cells_marked = scm_gc_cells_marked_acc;
answer = scm_listify (scm_cons (sym_gc_time_taken, scm_ulong2num (local_scm_gc_time_taken)),
scm_cons (sym_cells_allocated, scm_ulong2num (local_scm_cells_allocated)),
scm_cons (sym_heap_size, scm_ulong2num (local_scm_heap_size)),
scm_cons (sym_mallocated, scm_ulong2num (local_scm_mallocated)),
scm_cons (sym_mtrigger, scm_ulong2num (local_scm_mtrigger)),
+ scm_cons (sym_times, scm_ulong2num (local_scm_gc_times)),
+ scm_cons (sym_gc_mark_time_taken, scm_ulong2num (local_scm_gc_mark_time_taken)),
+ scm_cons (sym_gc_sweep_time_taken, scm_ulong2num (local_scm_gc_sweep_time_taken)),
+ scm_cons (sym_cells_marked, scm_dbl2big (local_scm_gc_cells_marked)),
+ scm_cons (sym_cells_swept, scm_dbl2big (local_scm_gc_cells_swept)),
scm_cons (sym_heap_segments, heap_segs),
SCM_UNDEFINED);
SCM_ALLOW_INTS;
#undef FUNC_NAME
-void
-scm_gc_start (const char *what)
+static void
+gc_start_stats (const char *what)
{
- scm_gc_rt = SCM_INUM (scm_get_internal_run_time ());
+ t_before_gc = scm_c_get_internal_run_time ();
+ scm_gc_cells_swept = 0;
scm_gc_cells_collected = 0;
scm_gc_yield_1 = scm_gc_yield;
scm_gc_yield = (scm_cells_allocated
}
-void
-scm_gc_end ()
+static void
+gc_end_stats ()
{
- scm_gc_rt = SCM_INUM (scm_get_internal_run_time ()) - scm_gc_rt;
- scm_gc_time_taken += scm_gc_rt;
+ unsigned long t = scm_c_get_internal_run_time ();
+ scm_gc_time_taken += (t - t_before_gc);
+ scm_gc_sweep_time_taken += (t - t_before_sweep);
+ ++scm_gc_times;
+
+ scm_gc_cells_marked_acc += scm_gc_cells_swept - scm_gc_cells_collected;
+ scm_gc_cells_swept_acc += scm_gc_cells_swept;
}
++master->clusters_allocated;
}
while (SCM_NULLP (cell));
+
+#ifdef GUILE_DEBUG_FREELIST
+ scm_check_freelist (cell);
+#endif
+
--scm_ints_disabled;
*freelist = SCM_FREE_CELL_CDR (cell);
- SCM_SET_FREE_CELL_TYPE (cell, scm_tc16_allocated);
return cell;
}
{
int j;
+ ++scm_gc_running_p;
scm_c_hook_run (&scm_before_gc_c_hook, 0);
#ifdef DEBUGINFO
fprintf (stderr,
? "*"
: (SCM_NULLP (scm_freelist2) ? "o" : "m"));
#endif
-#ifdef USE_THREADS
/* During the critical section, only the current thread may run. */
- SCM_THREAD_CRITICAL_SECTION_START;
-#endif
+ SCM_CRITICAL_SECTION_START;
/* fprintf (stderr, "gc: %s\n", what); */
- scm_gc_start (what);
-
if (!scm_stack_base || scm_block_gc)
{
- scm_gc_end ();
+ --scm_gc_running_p;
return;
}
+ gc_start_stats (what);
+
if (scm_mallocated < 0)
/* The byte count of allocated objects has underflowed. This is
probably because you forgot to report the sizes of objects you
int bound;
SCM * elts;
elts = SCM_VELTS (scm_continuation_stack);
- bound = SCM_LENGTH (scm_continuation_stack);
+ bound = SCM_VECTOR_LENGTH (scm_continuation_stack);
x = SCM_INUM (scm_continuation_stack_ptr);
while (x < bound)
{
scm_c_hook_run (&scm_before_mark_c_hook, 0);
+ clear_mark_space ();
+
#ifndef USE_THREADS
- /* Protect from the C stack. This must be the first marking
- * done because it provides information about what objects
- * are "in-use" by the C code. "in-use" objects are those
- * for which the values from SCM_LENGTH and SCM_CHARS must remain
- * usable. This requirement is stricter than a liveness
- * requirement -- in particular, it constrains the implementation
- * of scm_vector_set_length_x.
- */
+ /* Mark objects on the C stack. */
SCM_FLUSH_REGISTER_WINDOWS;
/* This assumes that all registers are saved into the jmp_buf */
setjmp (scm_save_regs_gc_mark);
#endif /* USE_THREADS */
- /* FIXME: insert a phase to un-protect string-data preserved
- * in scm_vector_set_length_x.
- */
-
j = SCM_NUM_PROTECTS;
while (j--)
scm_gc_mark (scm_sys_protects[j]);
scm_gc_mark (scm_root->handle);
#endif
+ t_before_sweep = scm_c_get_internal_run_time ();
+ scm_gc_mark_time_taken += (t_before_sweep - t_before_gc);
+
scm_c_hook_run (&scm_before_sweep_c_hook, 0);
scm_gc_sweep ();
scm_c_hook_run (&scm_after_sweep_c_hook, 0);
--scm_gc_heap_lock;
- scm_gc_end ();
+ gc_end_stats ();
-#ifdef USE_THREADS
- SCM_THREAD_CRITICAL_SECTION_END;
-#endif
+ SCM_CRITICAL_SECTION_END;
scm_c_hook_run (&scm_after_gc_c_hook, 0);
+ --scm_gc_running_p;
}
\f
/* {Mark/Sweep}
*/
+#define MARK scm_gc_mark
+#define FNAME "scm_gc_mark"
+#endif /*!MARK_DEPENDENCIES*/
/* Mark an object precisely.
*/
void
-scm_gc_mark (SCM p)
-#define FUNC_NAME "scm_gc_mark"
+MARK (SCM p)
+#define FUNC_NAME FNAME
{
register long i;
register SCM ptr;
+ scm_bits_t cell_type;
+#ifndef MARK_DEPENDENCIES
+# define RECURSE scm_gc_mark
+#else
+ /* go through the usual marking, but not for self-cycles. */
+# define RECURSE(x) do { if ((x) != p) scm_gc_mark (x); } while (0)
+#endif
ptr = p;
+#ifdef MARK_DEPENDENCIES
+ goto gc_mark_loop_first_time;
+#endif
+
gc_mark_loop:
if (SCM_IMP (ptr))
return;
gc_mark_nimp:
+
+#ifdef MARK_DEPENDENCIES
+ if (SCM_EQ_P (ptr, p))
+ return;
+
+ scm_gc_mark (ptr);
+ return;
+
+gc_mark_loop_first_time:
+#endif
+
+#if (SCM_DEBUG_CELL_ACCESSES == 1) || (defined (GUILE_DEBUG_FREELIST))
+ /* We are in debug mode. Check the ptr exhaustively. */
+ if (!scm_cellp (ptr))
+ SCM_MISC_ERROR ("rogue pointer in heap", SCM_EOL);
+#else
+ /* In non-debug mode, do at least some cheap testing. */
if (!SCM_CELLP (ptr))
SCM_MISC_ERROR ("rogue pointer in heap", SCM_EOL);
+#endif
- switch (SCM_TYP7 (ptr))
+#ifndef MARK_DEPENDENCIES
+
+ if (SCM_GCMARKP (ptr))
+ return;
+
+ SCM_SETGCMARK (ptr);
+
+#endif
+
+ cell_type = SCM_GC_CELL_TYPE (ptr);
+ switch (SCM_ITAG7 (cell_type))
{
case scm_tcs_cons_nimcar:
- if (SCM_GCMARKP (ptr))
- break;
- SCM_SETGCMARK (ptr);
- if (SCM_IMP (SCM_CDR (ptr))) /* SCM_IMP works even with a GC mark */
+ if (SCM_IMP (SCM_CDR (ptr)))
{
ptr = SCM_CAR (ptr);
goto gc_mark_nimp;
}
- scm_gc_mark (SCM_CAR (ptr));
- ptr = SCM_GCCDR (ptr);
+ RECURSE (SCM_CAR (ptr));
+ ptr = SCM_CDR (ptr);
goto gc_mark_nimp;
case scm_tcs_cons_imcar:
- if (SCM_GCMARKP (ptr))
- break;
- SCM_SETGCMARK (ptr);
- ptr = SCM_GCCDR (ptr);
+ ptr = SCM_CDR (ptr);
goto gc_mark_loop;
case scm_tc7_pws:
- if (SCM_GCMARKP (ptr))
- break;
- SCM_SETGCMARK (ptr);
- scm_gc_mark (SCM_CELL_OBJECT_2 (ptr));
- ptr = SCM_GCCDR (ptr);
+ RECURSE (SCM_SETTER (ptr));
+ ptr = SCM_PROCEDURE (ptr);
goto gc_mark_loop;
case scm_tcs_cons_gloc:
- if (SCM_GCMARKP (ptr))
- break;
- SCM_SETGCMARK (ptr);
{
/* Dirk:FIXME:: The following code is super ugly: ptr may be a struct
* or a gloc. If it is a gloc, the cell word #0 of ptr is a pointer
* to a heap cell. If it is a struct, the cell word #0 of ptr is a
* pointer to a struct vtable data region. The fact that these are
* accessed in the same way restricts the possibilites to change the
- * data layout of structs or heap cells.
+ * data layout of structs or heap cells.
*/
scm_bits_t word0 = SCM_CELL_WORD_0 (ptr) - scm_tc3_cons_gloc;
scm_bits_t * vtable_data = (scm_bits_t *) word0; /* access as struct */
- switch (vtable_data [scm_vtable_index_vcell])
+ if (vtable_data [scm_vtable_index_vcell] != 0)
{
- default:
- {
- /* ptr is a gloc */
- SCM gloc_car = SCM_PACK (word0);
- scm_gc_mark (gloc_car);
- ptr = SCM_GCCDR (ptr);
- goto gc_mark_loop;
- }
- case 1: /* ! */
- case 0: /* ! */
- {
- /* ptr is a struct */
- SCM layout = SCM_PACK (vtable_data [scm_vtable_index_layout]);
- int len = SCM_LENGTH (layout);
- char * fields_desc = SCM_CHARS (layout);
- /* We're using SCM_GCCDR here like STRUCT_DATA, except
- that it removes the mark */
- scm_bits_t * struct_data = (scm_bits_t *) SCM_UNPACK (SCM_GCCDR (ptr));
-
- if (vtable_data[scm_struct_i_flags] & SCM_STRUCTF_ENTITY)
- {
- scm_gc_mark (SCM_PACK (struct_data[scm_struct_i_procedure]));
- scm_gc_mark (SCM_PACK (struct_data[scm_struct_i_setter]));
- }
- if (len)
- {
- int x;
-
- for (x = 0; x < len - 2; x += 2, ++struct_data)
- if (fields_desc[x] == 'p')
- scm_gc_mark (SCM_PACK (*struct_data));
- if (fields_desc[x] == 'p')
- {
- if (SCM_LAYOUT_TAILP (fields_desc[x + 1]))
- for (x = *struct_data; x; --x)
- scm_gc_mark (SCM_PACK (*++struct_data));
- else
- scm_gc_mark (SCM_PACK (*struct_data));
- }
- }
- if (vtable_data [scm_vtable_index_vcell] == 0)
- {
- vtable_data [scm_vtable_index_vcell] = 1;
- ptr = SCM_PACK (vtable_data [scm_vtable_index_vtable]);
- goto gc_mark_loop;
- }
- }
+ /* ptr is a gloc */
+ SCM gloc_car = SCM_PACK (word0);
+ RECURSE (gloc_car);
+ ptr = SCM_CDR (ptr);
+ goto gc_mark_loop;
+ }
+ else
+ {
+ /* ptr is a struct */
+ SCM layout = SCM_PACK (vtable_data [scm_vtable_index_layout]);
+ int len = SCM_SYMBOL_LENGTH (layout);
+ char * fields_desc = SCM_SYMBOL_CHARS (layout);
+ scm_bits_t * struct_data = (scm_bits_t *) SCM_STRUCT_DATA (ptr);
+
+ if (vtable_data[scm_struct_i_flags] & SCM_STRUCTF_ENTITY)
+ {
+ RECURSE (SCM_PACK (struct_data[scm_struct_i_procedure]));
+ RECURSE (SCM_PACK (struct_data[scm_struct_i_setter]));
+ }
+ if (len)
+ {
+ int x;
+
+ for (x = 0; x < len - 2; x += 2, ++struct_data)
+ if (fields_desc[x] == 'p')
+ RECURSE (SCM_PACK (*struct_data));
+ if (fields_desc[x] == 'p')
+ {
+ if (SCM_LAYOUT_TAILP (fields_desc[x + 1]))
+ for (x = *struct_data++; x; --x, ++struct_data)
+ RECURSE (SCM_PACK (*struct_data));
+ else
+ RECURSE (SCM_PACK (*struct_data));
+ }
+ }
+ /* mark vtable */
+ ptr = SCM_PACK (vtable_data [scm_vtable_index_vtable]);
+ goto gc_mark_loop;
}
}
break;
case scm_tcs_closures:
- if (SCM_GCMARKP (ptr))
- break;
- SCM_SETGCMARK (ptr);
- if (SCM_IMP (SCM_CDR (ptr)))
+ if (SCM_IMP (SCM_ENV (ptr)))
{
ptr = SCM_CLOSCAR (ptr);
goto gc_mark_nimp;
}
- scm_gc_mark (SCM_CLOSCAR (ptr));
- ptr = SCM_GCCDR (ptr);
+ RECURSE (SCM_CLOSCAR (ptr));
+ ptr = SCM_ENV (ptr);
goto gc_mark_nimp;
case scm_tc7_vector:
- case scm_tc7_lvector:
-#ifdef CCLO
- case scm_tc7_cclo:
-#endif
- if (SCM_GC8MARKP (ptr))
- break;
- SCM_SETGC8MARK (ptr);
- i = SCM_LENGTH (ptr);
+ i = SCM_VECTOR_LENGTH (ptr);
if (i == 0)
break;
while (--i > 0)
if (SCM_NIMP (SCM_VELTS (ptr)[i]))
- scm_gc_mark (SCM_VELTS (ptr)[i]);
+ RECURSE (SCM_VELTS (ptr)[i]);
ptr = SCM_VELTS (ptr)[0];
goto gc_mark_loop;
- case scm_tc7_contin:
- if SCM_GC8MARKP
- (ptr) break;
- SCM_SETGC8MARK (ptr);
- if (SCM_VELTS (ptr))
- scm_mark_locations (SCM_VELTS_AS_STACKITEMS (ptr),
- (scm_sizet)
- (SCM_LENGTH (ptr) +
- (sizeof (SCM_STACKITEM) + -1 +
- sizeof (scm_contregs)) /
- sizeof (SCM_STACKITEM)));
- break;
+#ifdef CCLO
+ case scm_tc7_cclo:
+ {
+ unsigned long int i = SCM_CCLO_LENGTH (ptr);
+ unsigned long int j;
+ for (j = 1; j != i; ++j)
+ {
+ SCM obj = SCM_CCLO_REF (ptr, j);
+ if (!SCM_IMP (obj))
+ RECURSE (obj);
+ }
+ ptr = SCM_CCLO_REF (ptr, 0);
+ goto gc_mark_loop;
+ }
+#endif
#ifdef HAVE_ARRAYS
case scm_tc7_bvect:
case scm_tc7_byvect:
#endif
#endif
case scm_tc7_string:
- SCM_SETGC8MARK (ptr);
break;
case scm_tc7_substring:
- if (SCM_GC8MARKP(ptr))
- break;
- SCM_SETGC8MARK (ptr);
ptr = SCM_CDR (ptr);
goto gc_mark_loop;
case scm_tc7_wvect:
- if (SCM_GC8MARKP(ptr))
- break;
SCM_WVECT_GC_CHAIN (ptr) = scm_weak_vectors;
scm_weak_vectors = ptr;
- SCM_SETGC8MARK (ptr);
if (SCM_IS_WHVEC_ANY (ptr))
{
int x;
int weak_keys;
int weak_values;
- len = SCM_LENGTH (ptr);
+ len = SCM_VECTOR_LENGTH (ptr);
weak_keys = SCM_IS_WHVEC (ptr) || SCM_IS_WHVEC_B (ptr);
weak_values = SCM_IS_WHVEC_V (ptr) || SCM_IS_WHVEC_B (ptr);
* won't prematurely drop table entries.
*/
if (!weak_keys)
- scm_gc_mark (SCM_CAR (kvpair));
+ RECURSE (SCM_CAR (kvpair));
if (!weak_values)
- scm_gc_mark (SCM_GCCDR (kvpair));
+ RECURSE (SCM_CDR (kvpair));
alist = next_alist;
}
if (SCM_NIMP (alist))
- scm_gc_mark (alist);
+ RECURSE (alist);
}
}
break;
- case scm_tc7_msymbol:
- if (SCM_GC8MARKP(ptr))
- break;
- SCM_SETGC8MARK (ptr);
- scm_gc_mark (SCM_SYMBOL_FUNC (ptr));
- ptr = SCM_SYMBOL_PROPS (ptr);
+ case scm_tc7_symbol:
+ ptr = SCM_PROP_SLOTS (ptr);
goto gc_mark_loop;
- case scm_tc7_ssymbol:
- if (SCM_GC8MARKP(ptr))
- break;
- SCM_SETGC8MARK (ptr);
- break;
case scm_tcs_subrs:
break;
case scm_tc7_port:
i = SCM_PTOBNUM (ptr);
+#if (SCM_DEBUG_CELL_ACCESSES == 1) || (defined (GUILE_DEBUG_FREELIST))
if (!(i < scm_numptob))
- goto def;
- if (SCM_GC8MARKP (ptr))
- break;
- SCM_SETGC8MARK (ptr);
+ SCM_MISC_ERROR ("undefined port type", SCM_EOL);
+#endif
if (SCM_PTAB_ENTRY(ptr))
- scm_gc_mark (SCM_PTAB_ENTRY(ptr)->file_name);
+ RECURSE (SCM_FILENAME (ptr));
if (scm_ptobs[i].mark)
{
ptr = (scm_ptobs[i].mark) (ptr);
return;
break;
case scm_tc7_smob:
- if (SCM_GC8MARKP (ptr))
- break;
- SCM_SETGC8MARK (ptr);
- switch (SCM_GCTYP16 (ptr))
+ switch (SCM_TYP16 (ptr))
{ /* should be faster than going through scm_smobs */
case scm_tc_free_cell:
/* printf("found free_cell %X ", ptr); fflush(stdout); */
- case scm_tc16_allocated:
case scm_tc16_big:
case scm_tc16_real:
case scm_tc16_complex:
break;
default:
i = SCM_SMOBNUM (ptr);
+#if (SCM_DEBUG_CELL_ACCESSES == 1) || (defined (GUILE_DEBUG_FREELIST))
if (!(i < scm_numsmob))
- goto def;
+ SCM_MISC_ERROR ("undefined smob type", SCM_EOL);
+#endif
if (scm_smobs[i].mark)
{
ptr = (scm_smobs[i].mark) (ptr);
}
break;
default:
- def:
SCM_MISC_ERROR ("unknown type", SCM_EOL);
}
+#undef RECURSE
}
#undef FUNC_NAME
+#ifndef MARK_DEPENDENCIES
+
+#undef MARK
+#undef FNAME
+
+/* And here we define `scm_gc_mark_dependencies', by including this
+ * same file in itself.
+ */
+#define MARK scm_gc_mark_dependencies
+#define FNAME "scm_gc_mark_dependencies"
+#define MARK_DEPENDENCIES
+#include "gc.c"
+#undef MARK_DEPENDENCIES
+#undef MARK
+#undef FNAME
+
/* Mark a Region Conservatively
*/
break;
}
}
+
+ if (SCM_GC_IN_CARD_HEADERP (ptr))
+ break;
+
if (scm_heap_table[seg_id].span == 1
- || SCM_DOUBLE_CELLP (obj))
- scm_gc_mark (obj);
+ || DOUBLECELL_ALIGNED_P (obj))
+ scm_gc_mark (obj);
+
break;
}
}
unsigned int i = 0;
unsigned int j = scm_n_heap_segs - 1;
+ if (SCM_GC_IN_CARD_HEADERP (ptr))
+ return 0;
+
while (i < j) {
int k = (i + j) / 2;
if (SCM_PTR_GT (scm_heap_table[k].bounds[1], ptr)) {
}
}
- if (SCM_PTR_LE (scm_heap_table[i].bounds[0], ptr)
+ if (SCM_PTR_LE (scm_heap_table[i].bounds[0], ptr)
&& SCM_PTR_GT (scm_heap_table[i].bounds[1], ptr)
- && (scm_heap_table[i].span == 1 || SCM_DOUBLE_CELLP (value))) {
+ && (scm_heap_table[i].span == 1 || DOUBLECELL_ALIGNED_P (value))
+ && !SCM_GC_IN_CARD_HEADERP (ptr)
+ )
return 1;
- } else {
+ else
return 0;
- }
- } else {
+ } else
return 0;
- }
}
if (!SCM_NULLP (freelist->cells))
{
SCM c = freelist->cells;
- SCM_SETCAR (c, SCM_CDR (c));
- SCM_SETCDR (c, SCM_EOL);
+ SCM_SET_CELL_WORD_0 (c, SCM_FREE_CELL_CDR (c));
+ SCM_SET_CELL_WORD_1 (c, SCM_EOL);
freelist->collected +=
freelist->span * (freelist->cluster_size - freelist->left_to_collect);
}
freelist->grow_heap_p = (collected < freelist->min_yield);
}
+#define NEXT_DATA_CELL(ptr, span) \
+ do { \
+ scm_cell *nxt__ = CELL_UP ((char *) (ptr) + 1, (span)); \
+ (ptr) = (SCM_GC_IN_CARD_HEADERP (nxt__) ? \
+ CELL_UP (SCM_GC_CELL_CARD (nxt__) + SCM_GC_CARD_N_HEADER_CELLS, span) \
+ : nxt__); \
+ } while (0)
+
void
scm_gc_sweep ()
#define FUNC_NAME "scm_gc_sweep"
ptr = CELL_UP (scm_heap_table[i].bounds[0], span);
seg_size = CELL_DN (scm_heap_table[i].bounds[1], span) - ptr;
+
+ /* use only data cells in seg_size */
+ seg_size = (seg_size / SCM_GC_CARD_N_CELLS) * (SCM_GC_CARD_N_DATA_CELLS / span) * span;
+
+ scm_gc_cells_swept += seg_size;
+
for (j = seg_size + span; j -= span; ptr += span)
{
- SCM scmptr = PTR2SCM (ptr);
+ SCM scmptr;
- switch SCM_TYP7 (scmptr)
+ if (SCM_GC_IN_CARD_HEADERP (ptr))
{
+ SCM_CELLPTR nxt;
+
+ /* cheat here */
+ nxt = ptr;
+ NEXT_DATA_CELL (nxt, span);
+ j += span;
+
+ ptr = nxt - span;
+ continue;
+ }
+
+ scmptr = PTR2SCM (ptr);
+
+ if (SCM_GCMARKP (scmptr))
+ continue;
+
+ switch SCM_TYP7 (scmptr)
+ {
case scm_tcs_cons_gloc:
{
/* Dirk:FIXME:: Again, super ugly code: scmptr may be a
* struct or a gloc. See the corresponding comment in
* scm_gc_mark.
*/
- scm_bits_t word0 = SCM_CELL_WORD_0 (scmptr) - scm_tc3_cons_gloc;
- scm_bits_t * vtable_data = (scm_bits_t *) word0; /* access as struct */
- if (SCM_GCMARKP (scmptr))
+ scm_bits_t word0 = (SCM_CELL_WORD_0 (scmptr)
+ - scm_tc3_cons_gloc);
+ /* access as struct */
+ scm_bits_t * vtable_data = (scm_bits_t *) word0;
+ if (vtable_data[scm_vtable_index_vcell] == 0)
{
- if (vtable_data [scm_vtable_index_vcell] == 1)
- vtable_data [scm_vtable_index_vcell] = 0;
- goto cmrkcontinue;
- }
- else
- {
- if (vtable_data [scm_vtable_index_vcell] == 0
- || vtable_data [scm_vtable_index_vcell] == 1)
- {
- scm_struct_free_t free
- = (scm_struct_free_t) vtable_data[scm_struct_i_free];
- m += free (vtable_data, (scm_bits_t *) SCM_UNPACK (SCM_GCCDR (scmptr)));
- }
+ /* Structs need to be freed in a special order.
+ * This is handled by GC C hooks in struct.c.
+ */
+ SCM_SET_STRUCT_GC_CHAIN (scmptr, scm_structs_to_free);
+ scm_structs_to_free = scmptr;
+ continue;
}
+ /* fall through so that scmptr gets collected */
}
break;
case scm_tcs_cons_imcar:
case scm_tcs_cons_nimcar:
case scm_tcs_closures:
case scm_tc7_pws:
- if (SCM_GCMARKP (scmptr))
- goto cmrkcontinue;
break;
case scm_tc7_wvect:
- if (SCM_GC8MARKP (scmptr))
- {
- goto c8mrkcontinue;
- }
- else
- {
- m += (2 + SCM_LENGTH (scmptr)) * sizeof (SCM);
- scm_must_free ((char *)(SCM_VELTS (scmptr) - 2));
- break;
- }
-
+ m += (2 + SCM_VECTOR_LENGTH (scmptr)) * sizeof (SCM);
+ scm_must_free (SCM_VECTOR_BASE (scmptr) - 2);
+ break;
case scm_tc7_vector:
- case scm_tc7_lvector:
+ {
+ unsigned long int length = SCM_VECTOR_LENGTH (scmptr);
+ if (length > 0)
+ {
+ m += length * sizeof (scm_bits_t);
+ scm_must_free (SCM_VECTOR_BASE (scmptr));
+ }
+ break;
+ }
#ifdef CCLO
case scm_tc7_cclo:
-#endif
- if (SCM_GC8MARKP (scmptr))
- goto c8mrkcontinue;
-
- m += (SCM_LENGTH (scmptr) * sizeof (SCM));
- freechars:
- scm_must_free (SCM_CHARS (scmptr));
- /* SCM_SETCHARS(scmptr, 0);*/
+ m += (SCM_CCLO_LENGTH (scmptr) * sizeof (SCM));
+ scm_must_free (SCM_CCLO_BASE (scmptr));
break;
+#endif
#ifdef HAVE_ARRAYS
case scm_tc7_bvect:
- if SCM_GC8MARKP (scmptr)
- goto c8mrkcontinue;
- m += sizeof (long) * ((SCM_HUGE_LENGTH (scmptr) + SCM_LONG_BIT - 1) / SCM_LONG_BIT);
- goto freechars;
+ {
+ unsigned long int length = SCM_BITVECTOR_LENGTH (scmptr);
+ if (length > 0)
+ {
+ m += sizeof (long) * ((length + SCM_LONG_BIT - 1) / SCM_LONG_BIT);
+ scm_must_free (SCM_BITVECTOR_BASE (scmptr));
+ }
+ }
+ break;
case scm_tc7_byvect:
- if SCM_GC8MARKP (scmptr)
- goto c8mrkcontinue;
- m += SCM_HUGE_LENGTH (scmptr) * sizeof (char);
- goto freechars;
case scm_tc7_ivect:
case scm_tc7_uvect:
- if SCM_GC8MARKP (scmptr)
- goto c8mrkcontinue;
- m += SCM_HUGE_LENGTH (scmptr) * sizeof (long);
- goto freechars;
case scm_tc7_svect:
- if SCM_GC8MARKP (scmptr)
- goto c8mrkcontinue;
- m += SCM_HUGE_LENGTH (scmptr) * sizeof (short);
- goto freechars;
#ifdef HAVE_LONG_LONGS
case scm_tc7_llvect:
- if SCM_GC8MARKP (scmptr)
- goto c8mrkcontinue;
- m += SCM_HUGE_LENGTH (scmptr) * sizeof (long_long);
- goto freechars;
#endif
case scm_tc7_fvect:
- if SCM_GC8MARKP (scmptr)
- goto c8mrkcontinue;
- m += SCM_HUGE_LENGTH (scmptr) * sizeof (float);
- goto freechars;
case scm_tc7_dvect:
- if SCM_GC8MARKP (scmptr)
- goto c8mrkcontinue;
- m += SCM_HUGE_LENGTH (scmptr) * sizeof (double);
- goto freechars;
case scm_tc7_cvect:
- if SCM_GC8MARKP (scmptr)
- goto c8mrkcontinue;
- m += SCM_HUGE_LENGTH (scmptr) * 2 * sizeof (double);
- goto freechars;
+ m += SCM_UVECTOR_LENGTH (scmptr) * scm_uniform_element_size (scmptr);
+ scm_must_free (SCM_UVECTOR_BASE (scmptr));
+ break;
#endif
case scm_tc7_substring:
- if (SCM_GC8MARKP (scmptr))
- goto c8mrkcontinue;
break;
case scm_tc7_string:
- if (SCM_GC8MARKP (scmptr))
- goto c8mrkcontinue;
- m += SCM_HUGE_LENGTH (scmptr) + 1;
- goto freechars;
- case scm_tc7_msymbol:
- if (SCM_GC8MARKP (scmptr))
- goto c8mrkcontinue;
- m += (SCM_LENGTH (scmptr) + 1
- + (SCM_CHARS (scmptr) - (char *) SCM_SLOTS (scmptr)));
- scm_must_free ((char *)SCM_SLOTS (scmptr));
+ m += SCM_STRING_LENGTH (scmptr) + 1;
+ scm_must_free (SCM_STRING_CHARS (scmptr));
break;
- case scm_tc7_contin:
- if SCM_GC8MARKP (scmptr)
- goto c8mrkcontinue;
- m += SCM_LENGTH (scmptr) * sizeof (SCM_STACKITEM) + sizeof (scm_contregs);
- if (SCM_VELTS (scmptr))
- goto freechars;
- case scm_tc7_ssymbol:
- if SCM_GC8MARKP(scmptr)
- goto c8mrkcontinue;
+ case scm_tc7_symbol:
+ m += SCM_SYMBOL_LENGTH (scmptr) + 1;
+ scm_must_free (SCM_SYMBOL_CHARS (scmptr));
break;
case scm_tcs_subrs:
+ /* the various "subrs" (primitives) are never freed */
continue;
case scm_tc7_port:
- if SCM_GC8MARKP (scmptr)
- goto c8mrkcontinue;
if SCM_OPENP (scmptr)
{
int k = SCM_PTOBNUM (scmptr);
+#if (SCM_DEBUG_CELL_ACCESSES == 1) || (defined (GUILE_DEBUG_FREELIST))
if (!(k < scm_numptob))
- goto sweeperr;
+ SCM_MISC_ERROR ("undefined port type", SCM_EOL);
+#endif
/* Keep "revealed" ports alive. */
if (scm_revealed_count (scmptr) > 0)
continue;
SCM_SETSTREAM (scmptr, 0);
scm_remove_from_port_table (scmptr);
scm_gc_ports_collected++;
- SCM_SETAND_CAR (scmptr, ~SCM_OPN);
+ SCM_CLR_PORT_OPEN_FLAG (scmptr);
}
break;
case scm_tc7_smob:
- switch SCM_GCTYP16 (scmptr)
+ switch SCM_TYP16 (scmptr)
{
case scm_tc_free_cell:
case scm_tc16_real:
- if SCM_GC8MARKP (scmptr)
- goto c8mrkcontinue;
break;
#ifdef SCM_BIGDIG
case scm_tc16_big:
- if SCM_GC8MARKP (scmptr)
- goto c8mrkcontinue;
m += (SCM_NUMDIGS (scmptr) * SCM_BITSPERDIG / SCM_CHAR_BIT);
- goto freechars;
+ scm_must_free (SCM_BDIGITS (scmptr));
+ break;
#endif /* def SCM_BIGDIG */
case scm_tc16_complex:
- if SCM_GC8MARKP (scmptr)
- goto c8mrkcontinue;
- m += 2 * sizeof (double);
- goto freechars;
+ m += sizeof (scm_complex_t);
+ scm_must_free (SCM_COMPLEX_MEM (scmptr));
+ break;
default:
- if SCM_GC8MARKP (scmptr)
- goto c8mrkcontinue;
-
{
int k;
k = SCM_SMOBNUM (scmptr);
+#if (SCM_DEBUG_CELL_ACCESSES == 1) || (defined (GUILE_DEBUG_FREELIST))
if (!(k < scm_numsmob))
- goto sweeperr;
- m += (scm_smobs[k].free) (scmptr);
+ SCM_MISC_ERROR ("undefined smob type", SCM_EOL);
+#endif
+ if (scm_smobs[k].free)
+ m += (scm_smobs[k].free) (scmptr);
break;
}
}
break;
default:
- sweeperr:
SCM_MISC_ERROR ("unknown type", SCM_EOL);
}
-#if 0
- if (SCM_FREE_CELL_P (scmptr))
- exit (2);
-#endif
+
if (!--left_to_collect)
{
- SCM_SETCAR (scmptr, nfreelist);
+ SCM_SET_CELL_WORD_0 (scmptr, nfreelist);
*freelist->clustertail = scmptr;
freelist->clustertail = SCM_CDRLOC (scmptr);
SCM_SET_FREE_CELL_CDR (scmptr, nfreelist);
nfreelist = scmptr;
}
-
- continue;
- c8mrkcontinue:
- SCM_CLRGC8MARK (scmptr);
- continue;
- cmrkcontinue:
- SCM_CLRGCMARK (scmptr);
}
+
#ifdef GC_FREE_SEGMENTS
if (n == seg_size)
{
}
#ifdef GUILE_DEBUG_FREELIST
- scm_check_freelist (freelist == &scm_master_freelist
- ? scm_freelist
- : scm_freelist2);
scm_map_free_list ();
#endif
}
\f
-
/* {Front end to malloc}
*
- * scm_must_malloc, scm_must_realloc, scm_must_free, scm_done_malloc
+ * scm_must_malloc, scm_must_realloc, scm_must_free, scm_done_malloc,
+ * scm_done_free
*
- * These functions provide services comperable to malloc, realloc, and
- * free. They are for allocating malloced parts of scheme objects.
- * The primary purpose of the front end is to impose calls to gc.
+ * These functions provide services comparable to malloc, realloc, and
+ * free. They should be used when allocating memory that will be under
+ * control of the garbage collector, i.e., if the memory may be freed
+ * during garbage collection.
*/
-
/* scm_must_malloc
* Return newly malloced storage or throw an error.
*
* reason). When a new object of this smob is created you call
* scm_done_malloc with the size of the object. When your smob free
* function is called, be sure to include this size in the return
- * value. */
+ * value.
+ *
+ * If you can't actually free the memory in the smob free function,
+ * for whatever reason (like reference counting), you still can (and
+ * should) report the amount of memory freed when you actually free it.
+ * Do it by calling scm_done_malloc with the _negated_ size. Clever,
+ * eh? Or even better, call scm_done_free. */
void
scm_done_malloc (long size)
}
}
+void
+scm_done_free (long size)
+{
+ scm_mallocated -= size;
+}
-\f
+\f
/* {Heap Segments}
*
* Each heap segment is an array of objects of a particular size.
int scm_n_heap_segs = 0;
/* init_heap_seg
- * initializes a new heap segment and return the number of objects it contains.
+ * initializes a new heap segment and returns the number of objects it contains.
*
- * The segment origin, segment size in bytes, and the span of objects
- * in cells are input parameters. The freelist is both input and output.
+ * The segment origin and segment size in bytes are input parameters.
+ * The freelist is both input and output.
*
- * This function presume that the scm_heap_table has already been expanded
- * to accomodate a new segment record.
+ * This function presumes that the scm_heap_table has already been expanded
+ * to accomodate a new segment record and that the markbit space was reserved
+ * for all the cards in this segment.
*/
+#define INIT_CARD(card, span) \
+ do { \
+ SCM_GC_SET_CARD_BVEC (card, get_bvec ()); \
+ if ((span) == 2) \
+ SCM_GC_SET_CARD_DOUBLECELL (card); \
+ } while (0)
static scm_sizet
init_heap_seg (SCM_CELLPTR seg_org, scm_sizet size, scm_freelist_t *freelist)
if (seg_org == NULL)
return 0;
- ptr = CELL_UP (seg_org, span);
+ /* Align the begin ptr up.
+ */
+ ptr = SCM_GC_CARD_UP (seg_org);
/* Compute the ceiling on valid object pointers w/in this segment.
*/
- seg_end = CELL_DN ((char *) seg_org + size, span);
+ seg_end = SCM_GC_CARD_DOWN ((char *)seg_org + size);
/* Find the right place and insert the segment record.
*
scm_heap_table[new_seg_index].bounds[0] = ptr;
scm_heap_table[new_seg_index].bounds[1] = seg_end;
-
- /* Compute the least valid object pointer w/in this segment
- */
- ptr = CELL_UP (ptr, span);
-
-
/*n_new_cells*/
n_new_cells = seg_end - ptr;
{
SCM clusters;
SCM *clusterp = &clusters;
- int n_cluster_cells = span * freelist->cluster_size;
- while (n_new_cells > span) /* at least one spine + one freecell */
+ NEXT_DATA_CELL (ptr, span);
+ while (ptr < seg_end)
{
- /* Determine end of cluster
- */
- if (n_new_cells >= n_cluster_cells)
- {
- seg_end = ptr + n_cluster_cells;
- n_new_cells -= n_cluster_cells;
- }
- else
- /* [cmm] looks like the segment size doesn't divide cleanly by
- cluster size. bad cmm! */
- abort();
+ scm_cell *nxt = ptr;
+ scm_cell *prv = NULL;
+ scm_cell *last_card = NULL;
+ int n_data_cells = (SCM_GC_CARD_N_DATA_CELLS / span) * SCM_CARDS_PER_CLUSTER - 1;
+ NEXT_DATA_CELL(nxt, span);
/* Allocate cluster spine
*/
*clusterp = PTR2SCM (ptr);
- SCM_SETCAR (*clusterp, PTR2SCM (ptr + span));
+ SCM_SETCAR (*clusterp, PTR2SCM (nxt));
clusterp = SCM_CDRLOC (*clusterp);
- ptr += span;
+ ptr = nxt;
- while (ptr < seg_end)
+ while (n_data_cells--)
{
+ scm_cell *card = SCM_GC_CELL_CARD (ptr);
SCM scmptr = PTR2SCM (ptr);
+ nxt = ptr;
+ NEXT_DATA_CELL (nxt, span);
+ prv = ptr;
+
+ if (card != last_card)
+ {
+ INIT_CARD (card, span);
+ last_card = card;
+ }
SCM_SET_CELL_TYPE (scmptr, scm_tc_free_cell);
- SCM_SET_FREE_CELL_CDR (scmptr, PTR2SCM (ptr + span));
- ptr += span;
+ SCM_SET_FREE_CELL_CDR (scmptr, PTR2SCM (nxt));
+
+ ptr = nxt;
}
- SCM_SET_FREE_CELL_CDR (PTR2SCM (ptr - span), SCM_EOL);
+ SCM_SET_FREE_CELL_CDR (PTR2SCM (prv), SCM_EOL);
}
+ /* sanity check */
+ {
+ scm_cell *ref = seg_end;
+ NEXT_DATA_CELL (ref, span);
+ if (ref != ptr)
+ /* [cmm] looks like the segment size doesn't divide cleanly by
+ cluster size. bad cmm! */
+ abort();
+ }
+
/* Patch up the last cluster pointer in the segment
* to join it to the input freelist.
*/
SCM_CELLPTR ptr;
long len;
- if (scm_gc_heap_lock)
+ if (scm_gc_heap_lock)
{
/* Critical code sections (such as the garbage collector) aren't
* supposed to add heap segments.
abort ();
}
- if (scm_n_heap_segs == heap_segment_table_size)
+ if (scm_n_heap_segs == heap_segment_table_size)
{
/* We have to expand the heap segment table to have room for the new
* segment. Do not yet increment scm_n_heap_segs -- that is done by
}
}
-
/* Pick a size for the new heap segment.
* The rule for picking the size of a segment is explained in
* gc.h
SCM_DEFINE (scm_unhash_name, "unhash-name", 1, 0, 0,
(SCM name),
- "")
+ "Flushes the glocs for @var{name}, or all glocs if @var{name}\n"
+ "is @code{#t}.")
#define FUNC_NAME s_scm_unhash_name
{
int x;
*/
+/*
+ * If within a function you need to protect one or more scheme objects from
+ * garbage collection, pass them as parameters to one of the
+ * scm_remember_upto_here* functions below. These functions don't do
+ * anything, but since the compiler does not know that they are actually
+ * no-ops, it will generate code that calls these functions with the given
+ * parameters. Therefore, you can be sure that the compiler will keep those
+ * scheme values alive (on the stack or in a register) up to the point where
+ * scm_remember_upto_here* is called. In other words, place the call to
+ * scm_remember_upt_here* _behind_ the last code in your function, that
+ * depends on the scheme object to exist.
+ *
+ * Example: We want to make sure, that the string object str does not get
+ * garbage collected during the execution of 'some_function', because
+ * otherwise the characters belonging to str would be freed and
+ * 'some_function' might access freed memory. To make sure that the compiler
+ * keeps str alive on the stack or in a register such that it is visible to
+ * the conservative gc we add the call to scm_remember_upto_here_1 _after_ the
+ * call to 'some_function'. Note that this would not be necessary if str was
+ * used anyway after the call to 'some_function'.
+ * char *chars = SCM_STRING_CHARS (str);
+ * some_function (chars);
+ * scm_remember_upto_here_1 (str); // str will be alive up to this point.
+ */
+
+void
+scm_remember_upto_here_1 (SCM obj)
+{
+ /* Empty. Protects a single object from garbage collection. */
+}
+
+void
+scm_remember_upto_here_2 (SCM obj1, SCM obj2)
+{
+ /* Empty. Protects two objects from garbage collection. */
+}
+
+void
+scm_remember_upto_here (SCM obj, ...)
+{
+ /* Empty. Protects any number of objects from garbage collection. */
+}
+
+
+#if (SCM_DEBUG_DEPRECATED == 0)
+
void
scm_remember (SCM *ptr)
-{ /* empty */ }
+{
+ /* empty */
+}
+#endif /* SCM_DEBUG_DEPRECATED == 0 */
/*
These crazy functions prevent garbage collection
scm_protect_object (SCM obj)
{
SCM handle;
-
+
/* This critical section barrier will be replaced by a mutex. */
SCM_REDEFER_INTS;
-
+
handle = scm_hashq_create_handle_x (scm_protects, obj, SCM_MAKINUM (0));
SCM_SETCDR (handle, SCM_MAKINUM (SCM_INUM (SCM_CDR (handle)) + 1));
-
+
SCM_REALLOW_INTS;
-
+
return obj;
}
scm_unprotect_object (SCM obj)
{
SCM handle;
-
+
/* This critical section barrier will be replaced by a mutex. */
SCM_REDEFER_INTS;
-
+
handle = scm_hashq_get_handle (scm_protects, obj);
-
- if (SCM_IMP (handle))
+
+ if (SCM_FALSEP (handle))
{
fprintf (stderr, "scm_unprotect_object called on unprotected object\n");
abort ();
make_initial_segment (scm_sizet init_heap_size, scm_freelist_t *freelist)
{
scm_sizet rounded_size = round_to_cluster_size (freelist, init_heap_size);
+
if (!init_heap_seg ((SCM_CELLPTR) malloc (rounded_size),
rounded_size,
freelist))
freelist->heap_size = 0;
}
+
+/* Get an integer from an environment variable. */
+static int
+scm_i_getenv_int (const char *var, int def)
+{
+ char *end, *val = getenv (var);
+ long res;
+ if (!val)
+ return def;
+ res = strtol (val, &end, 10);
+ if (end == val)
+ return def;
+ return res;
+}
+
+
int
-scm_init_storage (scm_sizet init_heap_size_1, int gc_trigger_1,
- scm_sizet init_heap_size_2, int gc_trigger_2,
- scm_sizet max_segment_size)
+scm_init_storage ()
{
+ scm_sizet gc_trigger_1;
+ scm_sizet gc_trigger_2;
+ scm_sizet init_heap_size_1;
+ scm_sizet init_heap_size_2;
scm_sizet j;
- if (!init_heap_size_1)
- init_heap_size_1 = scm_default_init_heap_size_1;
- if (!init_heap_size_2)
- init_heap_size_2 = scm_default_init_heap_size_2;
-
j = SCM_NUM_PROTECTS;
while (j)
scm_sys_protects[--j] = SCM_BOOL_F;
scm_freelist = SCM_EOL;
scm_freelist2 = SCM_EOL;
- init_freelist (&scm_master_freelist,
- 1, SCM_CLUSTER_SIZE_1,
- gc_trigger_1 ? gc_trigger_1 : scm_default_min_yield_1);
- init_freelist (&scm_master_freelist2,
- 2, SCM_CLUSTER_SIZE_2,
- gc_trigger_2 ? gc_trigger_2 : scm_default_min_yield_2);
- scm_max_segment_size
- = max_segment_size ? max_segment_size : scm_default_max_segment_size;
+ gc_trigger_1 = scm_i_getenv_int ("GUILE_MIN_YIELD_1", scm_default_min_yield_1);
+ init_freelist (&scm_master_freelist, 1, SCM_CLUSTER_SIZE_1, gc_trigger_1);
+ gc_trigger_2 = scm_i_getenv_int ("GUILE_MIN_YIELD_2", scm_default_min_yield_2);
+ init_freelist (&scm_master_freelist2, 2, SCM_CLUSTER_SIZE_2, gc_trigger_2);
+ scm_max_segment_size = scm_i_getenv_int ("GUILE_MAX_SEGMENT_SIZE", scm_default_max_segment_size);
scm_expmem = 0;
scm_must_malloc (sizeof (scm_heap_seg_data_t) * 2, "hplims"));
heap_segment_table_size = 2;
+ mark_space_ptr = &mark_space_head;
+
+ init_heap_size_1 = scm_i_getenv_int ("GUILE_INIT_SEGMENT_SIZE_1", scm_default_init_heap_size_1);
+ init_heap_size_2 = scm_i_getenv_int ("GUILE_INIT_SEGMENT_SIZE_2", scm_default_init_heap_size_2);
if (make_initial_segment (init_heap_size_1, &scm_master_freelist) ||
make_initial_segment (init_heap_size_2, &scm_master_freelist2))
return 1;
SCM_SETCDR (scm_undefineds, scm_undefineds);
scm_listofnull = scm_cons (SCM_EOL, SCM_EOL);
- scm_nullstr = scm_makstr (0L, 0);
- scm_nullvect = scm_make_vector (SCM_INUM0, SCM_UNDEFINED);
- scm_symhash = scm_make_vector (SCM_MAKINUM (scm_symhash_dim), SCM_EOL);
- scm_weak_symhash = scm_make_weak_key_hash_table (SCM_MAKINUM (scm_symhash_dim));
- scm_symhash_vars = scm_make_vector (SCM_MAKINUM (scm_symhash_dim), SCM_EOL);
+ scm_nullstr = scm_allocate_string (0);
+ scm_nullvect = scm_c_make_vector (0, SCM_UNDEFINED);
+
+#define DEFAULT_SYMHASH_SIZE 277
+ scm_symhash = scm_c_make_hash_table (DEFAULT_SYMHASH_SIZE);
+ scm_symhash_vars = scm_c_make_hash_table (DEFAULT_SYMHASH_SIZE);
+
scm_stand_in_procs = SCM_EOL;
scm_permobjs = SCM_EOL;
- scm_protects = scm_make_vector (SCM_MAKINUM (31), SCM_EOL);
- scm_sysintern ("most-positive-fixnum", SCM_MAKINUM (SCM_MOST_POSITIVE_FIXNUM));
- scm_sysintern ("most-negative-fixnum", SCM_MAKINUM (SCM_MOST_NEGATIVE_FIXNUM));
-#ifdef SCM_BIGDIG
- scm_sysintern ("bignum-radix", SCM_MAKINUM (SCM_BIGRAD));
-#endif
+ scm_protects = scm_c_make_hash_table (31);
+
return 0;
}
SCM scm_after_gc_hook;
-#if (SCM_DEBUG_DEPRECATED == 0)
-static SCM scm_gc_vcell; /* the vcell for gc-thunk. */
-#endif /* SCM_DEBUG_DEPRECATED == 0 */
static SCM gc_async;
-
/* The function gc_async_thunk causes the execution of the after-gc-hook. It
* is run after the gc, as soon as the asynchronous events are handled by the
* evaluator.
gc_async_thunk (void)
{
scm_c_run_hook (scm_after_gc_hook, SCM_EOL);
-
-#if (SCM_DEBUG_DEPRECATED == 0)
-
- /* The following code will be removed in Guile 1.5. */
- if (SCM_NFALSEP (scm_gc_vcell))
- {
- SCM proc = SCM_CDR (scm_gc_vcell);
-
- if (SCM_NFALSEP (proc) && !SCM_UNBNDP (proc))
- scm_apply (proc, SCM_EOL, SCM_EOL);
- }
-
-#endif /* SCM_DEBUG_DEPRECATED == 0 */
-
return SCM_UNSPECIFIED;
}
{
SCM after_gc_thunk;
+#if (SCM_DEBUG_CELL_ACCESSES == 1)
+ scm_tc16_allocated = scm_make_smob_type ("allocated cell", 0);
+#endif /* SCM_DEBUG_CELL_ACCESSES == 1 */
+
scm_after_gc_hook = scm_create_hook ("after-gc-hook", 0);
-#if (SCM_DEBUG_DEPRECATED == 0)
- scm_gc_vcell = scm_sysintern ("gc-thunk", SCM_BOOL_F);
-#endif /* SCM_DEBUG_DEPRECATED == 0 */
- /* Dirk:FIXME:: We don't really want a binding here. */
- after_gc_thunk = scm_make_gsubr ("%gc-thunk", 0, 0, 0, gc_async_thunk);
- gc_async = scm_system_async (after_gc_thunk);
+ after_gc_thunk = scm_make_subr_opt ("%gc-thunk", scm_tc7_subr_0, gc_async_thunk, 0);
+ gc_async = scm_system_async (after_gc_thunk); /* protected via scm_asyncs */
scm_c_hook_add (&scm_after_gc_c_hook, mark_gc_async, NULL, 0);
+#ifndef SCM_MAGIC_SNARFER
#include "libguile/gc.x"
+#endif
}
+#endif /*MARK_DEPENDENCIES*/
+
/*
Local Variables:
c-file-style: "gnu"
HCoop / bpt / guile.git / blobdiff