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psyclpc/src/gcollect.c

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/*---------------------------------------------------------------------------
* Gamedriver - Garbage Collection
*
*---------------------------------------------------------------------------
* The garbage collection is used in times of memory shortage (or on request)
* to find and deallocate any unused objects, arrays, memory blocks, or
* whatever. The purpose is to detect and get rid of unreachable data (like
* circular array references), but the collector is also a last line of
* defense against bug-introduced memory leaks.
*
* This facility is available currently only when using the 'smalloc'
* memory allocator. When using a different allocator, all garbage_collect()
* does is freeing as much memory as possible.
*
* Additionally this module also offers a couple of functions to 'clean up'
* an object, ie. to scan all data referenced by this object for destructed
* objects and remove those references, and to change all untabled strings
* into tabled strings. These functions are used by the garbage collector
* to deallocate as much memory by normal means as possible; but they
* are also called from the backend as part of the regular reset/swap/cleanup
* handling.
*
#ifdef GC_SUPPORT
* The garbage collector is a simple mark-and-sweep collector. First, all
* references (refcounts and memory block markers) are cleared, then in
* a second pass, all reachable references are recreated (refcounts are
* incremented, memory blocks marked as used). The last pass then looks
* for all allocated but unmarked memory blocks: these are provably
* garbage and can be given back to the allocator. For debugging purposes,
* the collected memory blocks can be printed onto a file for closer
* inspection.
*
* In order to do its job, the garbage collector calls functions clear_...
* and count_... in all the other driver modules, where they are supposed
* to perform their clearing and counting operations. To aid the other
* modules in this, the collector offers a set of primitives to clearing
* and marking:
*
* int clear_memory_reference(void *p)
* Clear the memory block marker for <p>.
*
* void note_malloced_block_ref(void *p)
* Note the reference to memory block <p>.
*
* void clear_program_ref(program_t *p, Bool clear_ref)
* Clear the refcounts of all inherited programs and other
* data of <p>. If <clear_ref> is TRUE, the refcounts of
* <p> itself and of <p>->name are cleared, too.
*
* void clear_object_ref(object_t *p)
* Make sure that the refcounts in object <p> are cleared.
*
* void mark_program_ref(program_t *p);
* Set the marker of program <p> and of all data referenced by <p>.
*
* void reference_destructed_object(object_t *ob)
* Note the reference to a destructed object <ob>.
*
* void clear_string_ref(string_t *p)
* Clear the refcount in string <p>.
*
* void count_ref_from_string(string_t *p);
* Count the reference to string <p>.
*
* void clear_ref_in_vector(svalue_t *svp, size_t num);
* Clear the refs of the <num> elements of vector <svp>.
*
* void count_ref_in_vector(svalue_t *svp, size_t num)
* Count the references the <num> elements of vector <p>.
*
* The referencing code for dynamic data should mirror the destructor code,
* thus, memory leaks can show up as soon as the memory is allocated.
*
* TODO: Allow to deactivate the dump of unreferenced memory on freeing.
#endif
*---------------------------------------------------------------------------
*/
#include "driver.h"
#include "typedefs.h"
#include <sys/types.h>
#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#endif
#include <time.h>
#include <stdio.h>
#include "gcollect.h"
#include "actions.h"
#include "array.h"
#include "backend.h"
#include "call_out.h"
#include "closure.h"
#include "comm.h"
#include "ed.h"
#include "efuns.h"
#include "filestat.h"
#include "heartbeat.h"
#include "interpret.h"
#if defined(GC_SUPPORT) && defined(MALLOC_TRACE)
#include "instrs.h" /* Need F_ALLOCATE for setting up print dispatcher */
#endif
#include "lex.h"
#include "main.h"
#include "mapping.h"
#include "mempools.h"
#include "mregex.h"
#include "mstrings.h"
#include "object.h"
#include "otable.h"
#include "parse.h"
#include "pkg-pgsql.h"
#include "prolang.h"
#include "ptrtable.h"
#include "random.h"
#include "sent.h"
#include "simulate.h"
#include "simul_efun.h"
#include "stdstrings.h"
#ifdef USE_STRUCTS
#include "structs.h"
#endif /* USE_STRUCTS */
#include "swap.h"
#include "wiz_list.h"
#include "xalloc.h"
#include "i-eval_cost.h"
#include "../mudlib/sys/driver_hook.h"
/*-------------------------------------------------------------------------*/
time_t time_last_gc = 0;
/* Time of last gc, used by the backend to avoid repeated collections
* when the memory usage is at the edge of a shortage.
*/
#if defined(GC_SUPPORT)
int default_gcollect_outfd = 2;
/* The default file (default is stderr) to dump the reclaimed blocks on.
*/
int gcollect_outfd = 2;
#define gout gcollect_outfd
/* The current file (default is stderr) to dump the reclaimed blocks on.
* After the GC, this will be reset to <default_gcollect_outfd>.
*/
gc_status_t gc_status = gcInactive;
/* The current state of the garbage collection.
* swap uses this information when swapping in objects.
*/
object_t *gc_obj_list_destructed;
/* List of referenced but destructed objects.
* Scope is global so that the GC support functions in mapping.c can
* add their share of information.
*/
lambda_t *stale_misc_closures;
/* List of non-lambda closures bound to a destructed object.
* The now irrelevant .ob pointer is used to link the list elements.
* Scope is global so that the GC support functions in mapping.c can
* add their share of information.
*/
static lambda_t *stale_lambda_closures;
/* List of lambda closures bound to a destructed object.
* The now irrelevant .ob pointer is used to link the list elements.
*/
#endif /* GC_SUPPORT */
/*-------------------------------------------------------------------------*/
/*=========================================================================*/
/* Object clean up
*/
#ifdef NEW_CLEANUP
typedef struct cleanup_s cleanup_t;
typedef struct cleanup_map_extra_s cleanup_map_extra_t;
/* --- struct cleanup: The cleanup context information
*
* The controlling instance of this struct is passed to all cleanup functions.
*/
struct cleanup_s
{
ptrtable_t * ptable;
/* Pointertable to catch loops in the variable values.
* This table is re-allocated whenever the object cleant up is
* swapped, as the swapper can re-use the already listed memory
* blocks.
*/
unsigned long numValues; /* Number of values examined. */
Bool mcompact; /* TRUE: mappings are forcibly compacted */
ptrtable_t * mtable;
/* Pointertable of mappings to compact.
* This table holds all mappings listed in mlist so that multiple
* encounters of the same dirty mapping are easily recognized.
*/
mapping_t * mlist;
/* List of mappings to compact. The list is linked through
* the map->next field.
* The references are counted to prevent premature freeing.
*/
};
/* --- struct cleanup_map_extra: Info needed to clean up a mapping.
*
* A pointer to an instance of this structure is passed to the
* cleanup_mapping_filter() callback function.
*/
struct cleanup_map_extra_s
{
p_int width; /* Width of the mapping */
cleanup_t *context; /* The cleanup context */
};
/* Forward declarations */
static void cleanup_vector (svalue_t *svp, size_t num, cleanup_t * context);
/*-------------------------------------------------------------------------*/
static cleanup_t *
cleanup_new (Bool mcompact)
/* Create a new cleanup_t context and return it. <mcompact> is the
* .mcompact setting.
*/
{
cleanup_t * rc;
rc = xalloc(sizeof(*rc));
if (rc == NULL)
{
outofmemory("object cleanup context");
return NULL;
}
rc->ptable = new_pointer_table();
if (rc->ptable == NULL)
{
xfree(rc);
outofmemory("object cleanup pointertable");
return NULL;
}
rc->mtable = new_pointer_table();
if (rc->mtable == NULL)
{
free_pointer_table(rc->ptable);
xfree(rc);
outofmemory("object cleanup pointertable");
return NULL;
}
rc->mcompact = mcompact;
rc->mlist = NULL;
rc->numValues = 0;
return rc;
} /* cleanup_new() */
/*-------------------------------------------------------------------------*/
static Bool
cleanup_reset (cleanup_t * context)
/* Reallocate the pointertable in the context.
* Return TRUE if successful, and FALSE when out of memory.
*/
{
if (context->ptable)
free_pointer_table(context->ptable);
context->ptable = new_pointer_table();
if (context->ptable == NULL)
{
outofmemory("object cleanup pointertable");
return MY_FALSE;
}
return MY_TRUE;
} /* cleanup_reset() */
/*-------------------------------------------------------------------------*/
static void
cleanup_free (cleanup_t * context)
/* Deallocate the cleanup context <context>.
*/
{
if (context->ptable)
free_pointer_table(context->ptable);
free_pointer_table(context->mtable);
xfree(context);
} /* cleanup_free() */
/*-------------------------------------------------------------------------*/
static void
cleanup_mapping_filter (svalue_t *key, svalue_t *data, void *extra)
/* Clean up a single mapping element, <extra> points to
* a cleanup_map_extra_t instance.
*/
{
cleanup_map_extra_t * pData = (cleanup_map_extra_t*)extra;
cleanup_vector(key, 1, pData->context);
cleanup_vector(data, pData->width, pData->context);
} /* cleanup_mapping_filter() */
/*-------------------------------------------------------------------------*/
static void
cleanup_closure (svalue_t *csvp, cleanup_t * context)
/* Cleanup the closure <csvp>, using <context> as cleanup context.
* This may change *<csvp> to svalue-0.
*/
{
ph_int type = csvp->x.closure_type;
lambda_t *l = csvp->u.lambda;
/* If this closure is bound to or defined in a destructed object, zero it
* out.
*/
if (destructed_object_ref(csvp))
{
free_closure(csvp);
put_number(csvp, 0);
return;
}
if (!CLOSURE_MALLOCED(type)
|| register_pointer(context->ptable, l) == NULL
)
return;
/* If the creating program has been destructed, zero out the reference.
*/
if (CLOSURE_MALLOCED(type)
&& l->prog_ob
&& (l->prog_ob->flags & O_DESTRUCTED))
{
free_object(l->prog_ob, "cleanup_closure");
l->prog_ob = NULL;
l->prog_pc = 0;
}
if (CLOSURE_HAS_CODE(type))
{
mp_int num_values;
svalue_t *svp;
svp = (svalue_t *)l;
if ( (num_values = EXTRACT_UCHAR(l->function.code)) == 0xff)
num_values = svp[-0x100].u.number;
svp -= num_values;
cleanup_vector(svp, (size_t)num_values, context);
}
else if (type == CLOSURE_BOUND_LAMBDA)
{
svalue_t dummy;
dummy.type = T_CLOSURE;
dummy.x.closure_type = CLOSURE_UNBOUND_LAMBDA;
dummy.u.lambda = l->function.lambda;
cleanup_closure(&dummy, context);
}
#ifdef USE_NEW_INLINES
if (type == CLOSURE_LFUN && l->function.lfun.context_size != 0)
{
unsigned short size = l->function.lfun.context_size;
cleanup_vector(l->context, size, context);
}
#endif /* USE_NEW_INLINES */
} /* cleanup_closure() */
/*-------------------------------------------------------------------------*/
static void
cleanup_vector (svalue_t *svp, size_t num, cleanup_t * context)
/* Cleanup the <num> svalues in vector/svalue block <svp>.
* <context> is used to keep track which complex values we already
* cleaned up.
*/
{
svalue_t *p;
if (!svp) /* e.g. when called for obj->variables */
return;
if (register_pointer(context->ptable, svp) == NULL) /* already cleaned up */
return;
for (p = svp; p < svp+num; p++)
{
context->numValues++;
switch(p->type)
{
case T_OBJECT:
{
if (p->u.ob->flags & O_DESTRUCTED)
{
free_object(p->u.ob, "cleanup svalues");
put_number(p, 0);
}
break;
}
case T_POINTER:
case T_QUOTED_ARRAY:
/* Don't clean the null vector */
if (p->u.vec != &null_vector)
{
cleanup_vector(&p->u.vec->item[0], VEC_SIZE(p->u.vec), context);
}
break;
#ifdef USE_STRUCTS
case T_STRUCT:
cleanup_vector(&p->u.strct->member[0], struct_size(p->u.strct), context);
break;
#endif /* USE_STRUCTS */
case T_MAPPING:
if (register_pointer(context->ptable, p->u.map) != NULL)
{
cleanup_map_extra_t extra;
extra.width = p->u.map->num_values;
extra.context = context;
check_map_for_destr(p->u.map);
walk_mapping(p->u.map, cleanup_mapping_filter, &extra);
/* Remember the mapping for later compaction (unless
* we have it already).
* Only 'dirty' mappings need to be listed, as the cleanup
* can't cause a mapping to add a hash part.
*/
if (p->u.map->hash
&& NULL != register_pointer(context->mtable, p->u.map)
)
{
p->u.map->next = context->mlist;
context->mlist = ref_mapping(p->u.map);
}
}
break;
case T_STRING:
if (!mstr_tabled(p->u.str))
p->u.str = make_tabled(p->u.str);
break;
case T_CLOSURE:
cleanup_closure(p, context);
break;
}
} /* for */
} /* cleanup_vector() */
/*-------------------------------------------------------------------------*/
static Bool
cleanup_single_object (object_t * obj, cleanup_t * context)
/* Cleanup object <ob> using context <context>.
*
* If the object is on the swap, it will be swapped in for the time
* of the function.
*
* Return FALSE if the objects was present in memory, and TRUE if it
* had to be swapped in.
*
* The function checks all variables of this object for references
* to destructed objects and removes them. Also, untabled strings
* are made tabled.
*/
{
#ifdef USE_SWAP
int was_swapped = 0;
/* Swap in the object if necessary */
if ((obj->flags & O_SWAPPED)
&& (was_swapped = load_ob_from_swap(obj)) < 0)
{
errorf("(%s:%d) Out of memory swapping in %s\n", __FILE__, __LINE__
, get_txt(obj->name));
return MY_FALSE;
}
#endif
/* If the object's program blueprint is destructed, remove that
* reference.
*/
if (obj->prog->blueprint
&& (obj->prog->blueprint->flags & O_DESTRUCTED)
)
{
free_object(obj->prog->blueprint, "cleanup object");
obj->prog->blueprint = NULL;
#ifdef USE_SWAP
remove_prog_swap(obj->prog, MY_TRUE);
#endif
}
/* Clean up all the variables */
cleanup_vector(obj->variables, obj->prog->num_variables, context);
#ifdef USE_SWAP
/* Clean up */
if (was_swapped)
{
swap(obj, was_swapped);
}
return was_swapped != 0;
#else
return 0 != 0;
#endif
} /* cleanup_single_object() */
/*-------------------------------------------------------------------------*/
static void
cleanup_structures (cleanup_t * context)
/* Cleanup the value holding structures of the driver, using context
* <context>.
*
* The structures are:
* - driver hooks
* - wizlist extra entries
*/
{
/* Cleanup the wizlist */
{
wiz_list_t * wiz;
for (wiz = all_wiz; wiz != NULL; wiz = wiz->next)
cleanup_vector(&wiz->extra, 1, context);
cleanup_vector(&default_wizlist_entry.extra, 1, context);
}
/* Cleanup the driver hooks.
* We have to be careful here to not free the lambda-closure hooks even
* if they are bound to destructed objects.
*/
{
int i;
for (i = 0; i < NUM_DRIVER_HOOKS; i++)
{
if (driver_hook[i].type == T_CLOSURE
&& ( driver_hook[i].x.closure_type == CLOSURE_LAMBDA
|| driver_hook[i].x.closure_type == CLOSURE_BOUND_LAMBDA
)
)
{
if (destructed_object_ref(&driver_hook[i]))
{
lambda_t * l = driver_hook[i].u.lambda;
free_object(l->ob, "cleanup_structures");
l->ob = ref_object(master_ob, "cleanup_structures");
}
}
else
cleanup_vector(&driver_hook[i], 1, context);
}
}
} /* cleanup_structures() */
/*-------------------------------------------------------------------------*/
static void
cleanup_compact_mappings (cleanup_t * context)
/* Compact all mappings listed in the <context>.
* This must be the very last action in the cleanup process.
*/
{
mapping_t * m;
for (m = context->mlist; m != NULL; m = context->mlist)
{
context->mlist = m->next;
if (m->ref > 1)
compact_mapping(m, context->mcompact);
free_mapping(m); /* Might deallocate it fully */
}
} /* cleanup_compact_mappings() */
#endif /* NEW_CLEANUP */
/*-------------------------------------------------------------------------*/
void
cleanup_object (object_t * obj)
/* Cleanup object <ob>, but don't force the mapping compaction.
*
* If the object is on the swap, it will be swapped in for the time
* of the function.
*
* The function checks all variables of this object for references
* to destructed objects and removes them. Also, untabled strings
* are made tabled. The time for the next cleanup is set to
* a time in the interval [0.9*time_to_cleanup .. 1.1 * time_to_cleanup]
* from now (if time_to_cleanup is 0, DEFAULT_CLEANUP_TIME is assumed).
*
* This function is called by the backend.
*/
{
#ifndef NEW_CLEANUP
return;
#else
cleanup_t * context = NULL;
#ifdef LOG_NEW_CLEANUP
struct timeval t_begin, t_end;
#endif /* LOG_NEW_CLEANUP */
Bool didSwap = MY_FALSE;
unsigned long numValues = 0;
#ifdef LOG_NEW_CLEANUP
if (gettimeofday(&t_begin, NULL))
{
t_begin.tv_sec = t_begin.tv_usec = 0;
}
#endif /* LOG_NEW_CLEANUP */
context = cleanup_new(MY_FALSE);
if (context != NULL)
{
didSwap = cleanup_single_object(obj, context);
cleanup_compact_mappings(context);
numValues = context->numValues;
cleanup_free(context);
}
obj->time_cleanup = current_time + (9*time_to_data_cleanup)/10
+ random_number((2*time_to_data_cleanup)/10);
#ifdef LOG_NEW_CLEANUP
if (t_begin.tv_sec == 0
|| gettimeofday(&t_end, NULL))
{
debug_message("%s Data-Clean: %6lu values: /%s %s\n"
, time_stamp(), numValues, get_txt(obj->name)
, didSwap ? "(swapped)" : "");
#if defined(USE_LDMUD_COMPATIBILITY) && defined(VERBOSE)
printf("%s Data-Clean: %6lu values: /%s %s\n"
, time_stamp(), numValues, get_txt(obj->name)
, didSwap ? "(swapped)" : "");
#endif
}
else
{
t_end.tv_sec -= t_begin.tv_sec;
t_end.tv_usec -= t_begin.tv_usec;
if (t_end.tv_usec < 0)
{
t_end.tv_sec--;
t_end.tv_usec += 1000000;
}
debug_message("%s Data-Clean: %3ld.%06ld s, %6lu values: /%s%s\n"
, time_stamp()
, (long)t_end.tv_sec, (long)t_end.tv_usec
, numValues
, get_txt(obj->name)
, didSwap ? " (swapped)" : ""
);
#if defined(USE_LDMUD_COMPATIBILITY) && defined(VERBOSE)
printf("%s Data-Clean: %3ld.%06ld s, %6lu values: /%s%s\n"
, time_stamp()
, (long)t_end.tv_sec, (long)t_end.tv_usec
, numValues
, get_txt(obj->name)
, didSwap ? " (swapped)" : ""
);
#endif
}
#endif /* LOG_NEW_CLEANUP */
#endif /* NEW_CLEANUP */
} /* cleanup_object() */
/*-------------------------------------------------------------------------*/
void
cleanup_driver_structures (void)
/* Cleanup the fixed driver structures if it is time.
*
* The time for the next cleanup is set to a time in the interval
* [0.9*time_to_cleanup .. 1.1 * time_to_cleanup] from now (if time_to_cleanup
* is 0, DEFAULT_CLEANUP_TIME is assumed).
*
* This function is called by the backend.
*/
{
#ifndef NEW_CLEANUP
return;
#else
cleanup_t * context = NULL;
#ifdef LOG_NEW_CLEANUP
struct timeval t_begin, t_end;
#endif /* LOG_NEW_CLEANUP */
unsigned long numValues = 0;
static mp_int time_cleanup = 0;
/* Time of the next regular cleanup. */
/* Is it time for the cleanup yet? */
if (time_cleanup != 0 && time_cleanup >= current_time)
return;
time_cleanup = current_time + (9*time_to_data_cleanup)/10
+ random_number((2*time_to_data_cleanup)/10);
#ifdef LOG_NEW_CLEANUP
if (gettimeofday(&t_begin, NULL))
{
t_begin.tv_sec = t_begin.tv_usec = 0;
}
#endif /* LOG_NEW_CLEANUP */
context = cleanup_new(MY_FALSE);
if (context != NULL)
{
cleanup_structures(context);
cleanup_compact_mappings(context);
numValues = context->numValues;
cleanup_free(context);
}
#ifdef LOG_NEW_CLEANUP
if (t_begin.tv_sec == 0
|| gettimeofday(&t_end, NULL))
{
debug_message("%s Data-Clean: %6lu values: Fixed structures\n"
, time_stamp(), numValues);
#if defined(USE_LDMUD_COMPATIBILITY) && defined(VERBOSE)
printf("%s Data-Clean: %6lu values: Fixed structures\n"
, time_stamp(), numValues);
#endif
}
else
{
t_end.tv_sec -= t_begin.tv_sec;
t_end.tv_usec -= t_begin.tv_usec;
if (t_end.tv_usec < 0)
{
t_end.tv_sec--;
t_end.tv_usec += 1000000;
}
debug_message("%s Data-Clean: %3ld.%06ld s, %6lu values: Fixed structures\n"
, time_stamp()
, (long)t_end.tv_sec, (long)t_end.tv_usec
, numValues
);
#if defined(USE_LDMUD_COMPATIBILITY) && defined(VERBOSE)
printf("%s Data-Clean: %3ld.%06ld s, %6lu values: Fixed structures\n"
, time_stamp()
, (long)t_end.tv_sec, (long)t_end.tv_usec
, numValues
);
#endif
}
#endif /* LOG_NEW_CLEANUP */
#endif /* NEW_CLEANUP */
} /* cleanup_driver_structures() */
/*-------------------------------------------------------------------------*/
void
cleanup_all_objects (void)
/* Cleanup all objects in the game, and force the mapping compaction.
* This function is called by the garbage-collector right at the start,
* and also by the backend.
*/
{
#ifndef NEW_CLEANUP
return;
#else
cleanup_t * context = NULL;
#ifdef LOG_NEW_CLEANUP_ALL
struct timeval t_begin, t_end;
#endif /* LOG_NEW_CLEANUP_ALL */
long numObjects = 0;
unsigned long numValues = 0;
#ifdef LOG_NEW_CLEANUP_ALL
if (gettimeofday(&t_begin, NULL))
{
t_begin.tv_sec = t_begin.tv_usec = 0;
}
debug_message("%s Data-Clean: All Objects\n"
, time_stamp()
);
#if defined(USE_LDMUD_COMPATIBILITY) && defined(VERBOSE)
printf("%s Data-Clean: All Objects\n"
, time_stamp()
);
#endif
#endif /* LOG_NEW_CLEANUP_ALL */
context = cleanup_new(MY_TRUE);
if (context != NULL)
{
object_t * ob;
for (ob = obj_list; ob; ob = ob->next_all)
{
/* If the object is swapped for the cleanup, throw away
* the pointertable afterwards as the memory locations
* are no longer unique.
*/
if ( cleanup_single_object(ob, context)
&& !cleanup_reset(context))
{
cleanup_free(context);
return;
}
numObjects++;
}
cleanup_structures(context);
cleanup_compact_mappings(context);
numValues = context->numValues;
cleanup_free(context);
}
#ifdef LOG_NEW_CLEANUP_ALL
if (t_begin.tv_sec == 0
|| gettimeofday(&t_end, NULL))
{
debug_message("%s Data-Cleaned %ld objects: %lu values.\n", time_stamp(), numObjects, numValues);
#if defined(USE_LDMUD_COMPATIBILITY) && defined(VERBOSE)
printf("%s Data-Cleaned %ld objects: %lu values.\n", time_stamp(), numObjects, numValues);
#endif
}
else
{
t_end.tv_sec -= t_begin.tv_sec;
t_end.tv_usec -= t_begin.tv_usec;
if (t_end.tv_usec < 0)
{
t_end.tv_sec--;
t_end.tv_usec += 1000000;
}
debug_message("%s Data-Cleaned %ld objects in %ld.%06ld s, %6lu values.\n"
, time_stamp(), numObjects
, (long)t_end.tv_sec, (long)t_end.tv_usec
, numValues
);
#if defined(USE_LDMUD_COMPATIBILITY) && defined(VERBOSE)
printf("%s Data-Cleaned %ld objects in %ld.%06ld s, %6lu values.\n"
, time_stamp(), numObjects
, (long)t_end.tv_sec, (long)t_end.tv_usec
, numValues
);
#endif
}
#endif /* LOG_NEW_CLEANUP_ALL */
#endif /* NEW_CLEANUP */
} /* cleanup_all_objects() */
/*=========================================================================*/
/* The real collector - only if the allocator allows it.
*/
#if defined(GC_SUPPORT)
#if defined(CHECK_OBJECT_GC_REF) && defined(DUMP_GC_REFS)
# error Must define either CHECK_OBJECT_GC_REF or DUMP_GC_REFS.
# undef DUMP_GC_REFS
#endif
#define CLEAR_REF(p) x_clear_ref(p)
/* Clear the memory block marker for <p>
*/
#ifdef CHECK_OBJECT_GC_REF
unsigned long gc_mark_ref(void * p, const char * file, int line)
{
if (is_object_allocation(p))
{
dprintf3(gout, "DEBUG: Object %x referenced as something else from %s:%d\n"
, (p_int)p, (p_int)file, (p_int)line);
}
if (is_program_allocation(p))
{
dprintf3(gout, "DEBUG: Program %x referenced as something else from %s:%d\n"
, (p_int)p, (p_int)file, (p_int)line);
}
return x_mark_ref(p);
}
#define MARK_REF(p) gc_mark_ref(p, __FILE__, __LINE__)
#define MARK_PLAIN_REF(p) x_mark_ref(p)
#else
#define MARK_REF(p) x_mark_ref(p)
/* Set the memory block marker for <p>
*/
#define MARK_PLAIN_REF(p) MARK_REF(p)
#endif
#define TEST_REF(p) x_test_ref(p)
/* Check the memory block marker for <p>, return TRUE if _not_ set.
*/
#define CHECK_REF(p) ( TEST_REF(p) && ( MARK_REF(p),MY_TRUE ) )
/* Check the memory block marker for <p> and set it if necessary.
* Return TRUE if the marker was not set, FALSE else.
*/
#define MSTRING_REFS(str) ((str)->info.ref)
/* Return the refcount of mstring <str>
*/
/* Forward declarations */
static void clear_map_ref_filter (svalue_t *, svalue_t *, void *);
static void clear_ref_in_closure (lambda_t *l, ph_int type);
static void gc_count_ref_in_closure (svalue_t *csvp);
static void gc_MARK_MSTRING_REF (string_t * str);
#define count_ref_in_closure(p) \
GC_REF_DUMP(svalue_t*, p, "Count ref in closure", gc_count_ref_in_closure)
#define MARK_MSTRING_REF(str) \
GC_REF_DUMP(string_t*, str, "Mark string", gc_MARK_MSTRING_REF)
/*-------------------------------------------------------------------------*/
#if defined(MALLOC_TRACE)
#define WRITES(d, s) writes(d, s)
/*-------------------------------------------------------------------------*/
static INLINE void
write_malloc_trace (void * p)
/* Dump the allocation information for <p>, if any.
*/
{
WRITES(gout, ((char **)(p))[-2]);
WRITES(gout, " ");
writed(gout, (int)((p_uint *)(p))[-1]);
WRITES(gout, "\n");
} /* write_malloc_trace() */
#else
#define write_malloc_trace(p)
#define WRITES(d, s)
#endif /* MALLOC_TRACE */
/*-------------------------------------------------------------------------*/
void
clear_memory_reference (void *p)
/* Clear the memory block marker for block <p>.
*/
{
CLEAR_REF(p);
} /* clear_memory_reference() */
/*-------------------------------------------------------------------------*/
Bool
test_memory_reference (void *p)
/* Test if the memory block <p> is marked as referenced.
* Return TRUE if it is NOT referenced, and FALSE it it is.
*/
{
return TEST_REF(p);
} /* test_memory_reference() */
/*-------------------------------------------------------------------------*/
static INLINE void
gc_note_ref (void *p
#ifdef CHECK_OBJECT_GC_REF
, const char * file, int line
#endif
)
/* Note the reference to memory block <p>.
*
* It is no use to write a diagnostic on the second or higher reference
* to the memory block, as this can happen when an object is swapped in,
* marked, swapped out, and the next swapped-in object reuses the memory block
* released from the one before.
*/
{
if (TEST_REF(p))
{
#ifdef CHECK_OBJECT_GC_REF
gc_mark_ref(p, file, line);
#else
MARK_REF(p);
#endif
return;
}
} /* gc_note_ref() */
#ifdef CHECK_OBJECT_GC_REF
void gc_note_malloced_block_ref (void *p, const char * file, int line) { gc_note_ref(p, file, line); }
#define note_ref(p) gc_note_ref(p, __FILE__, __LINE__)
#define passed_note_ref(p) gc_note_ref(p, file, line)
#else
void gc_note_malloced_block_ref (void *p) { gc_note_ref(p); }
#define note_ref(p) GC_REF_DUMP(void*, p, "Note ref", gc_note_ref)
#define passed_note_ref(p) note_ref(p)
#endif
/*-------------------------------------------------------------------------*/
void
clear_string_ref (string_t *p)
/* Clear the references in string <p>
*/
{
p->info.ref = 0;
} /* clear_string_ref() */
/*-------------------------------------------------------------------------*/
void
clear_program_ref (program_t *p, Bool clear_ref)
/* Clear the refcounts of all inherited programs and other associated
* data of of <p> .
* If <clear_ref> is TRUE, the refcount of <p> itself is cleared, too.
*/
{
int i;
if (clear_ref)
{
p->ref = 0;
}
if (p->name)
clear_string_ref(p->name);
/* Variables */
for (i = p->num_variables; --i >= 0;)
{
clear_fulltype_ref(&p->variables[i].type);
}
/* Non-inherited functions */
for (i = p->num_functions; --i >= 0; )
{
if ( !(p->functions[i] & NAME_INHERITED) )
{
vartype_t vt;
memcpy(
&vt,
FUNCTION_TYPEP(p->program + (p->functions[i] & FUNSTART_MASK)),
sizeof vt
);
clear_vartype_ref(&vt);
}
}
#ifdef USE_STRUCTS
/* struct definitions */
for (i = 0; i <p->num_structs; i++)
{
clear_struct_type_ref(p->struct_defs[i].type);
}
#endif /* USE_STRUCTS */
for (i = 0; i < p->num_inherited; i++)
{
/* Inherited programs are never swapped. Only programs with blueprints
* are swapped, and a blueprint and one inheritance makes two refs.
*/
program_t *p2;
p2 = p->inherit[i].prog;
if (p2->ref)
{
clear_program_ref(p2, MY_TRUE);
}
}
} /* clear_program_ref() */
/*-------------------------------------------------------------------------*/
void
clear_object_ref (object_t *p)
/* If <p> is a destructed object, its refcounts are cleared.
* If <p> is a live object, its refcounts are assumed to be cleared
* by the GC main method.
*/
{
if ((p->flags & O_DESTRUCTED) && p->ref)
{
#if defined(CHECK_OBJECT_REF) && defined(DEBUG)
p->extra_ref = p->ref;
#endif
p->ref = 0;
clear_string_ref(p->name);
if (p->prog->blueprint
&& (p->prog->blueprint->flags & O_DESTRUCTED)
&& p->prog->blueprint->ref
)
{
#if defined(CHECK_OBJECT_REF) && defined(DEBUG)
p->prog->blueprint->extra_ref = p->prog->blueprint->ref;
#endif
p->prog->blueprint->ref = 0;
}
clear_program_ref(p->prog, MY_TRUE);
}
} /* clear_object_ref() */
/*-------------------------------------------------------------------------*/
void
gc_mark_program_ref (program_t *p)
/* Set the marker of program <p> and of all data referenced by <p>.
*/
{
#ifdef CHECK_OBJECT_GC_REF
if (TEST_REF(p) && ( MARK_PLAIN_REF(p),MY_TRUE ) )
#else
if (CHECK_REF(p)) /* ...then mark referenced data */
#endif
{
int i;
unsigned char *program = p->program;
uint32 *functions = p->functions;
string_t **strings;
variable_t *variables;
if (p->ref++)
{
dump_malloc_trace(1, p);
fatal("First reference to program %p '%s', but ref count %ld != 0\n"
, p, p->name ? get_txt(p->name) : "<null>", (long)p->ref - 1
);
}
MARK_MSTRING_REF(p->name);
/* Mark the blueprint object, if any */
if (p->blueprint)
{
if (p->blueprint->flags & O_DESTRUCTED)
{
reference_destructed_object(p->blueprint);
p->blueprint = NULL;
#ifdef USE_SWAP
remove_prog_swap(p, MY_TRUE);
#endif
}
else
{
p->blueprint->ref++;
/* No note_ref() necessary: the blueprint is in
* the global object list
*/
}
}
if (p->line_numbers)
note_ref(p->line_numbers);
/* Non-inherited functions */
for (i = p->num_functions; --i >= 0; )
{
if ( !(functions[i] & NAME_INHERITED) )
{
string_t *name;
vartype_t vt;
memcpy(
&name,
FUNCTION_NAMEP(program + (functions[i] & FUNSTART_MASK)),
sizeof name
);
MARK_MSTRING_REF(name);
memcpy(
&vt,
FUNCTION_TYPEP(program + (functions[i] & FUNSTART_MASK)),
sizeof vt
);
count_vartype_ref(&vt);
}
}
/* String literals */
strings = p->strings;
for (i = p->num_strings; --i >= 0; )
{
string_t *str = *strings++;
MARK_MSTRING_REF(str);
}
/* Variable names */
variables = p->variables;
for (i = p->num_variables; --i >= 0; variables++)
{
MARK_MSTRING_REF(variables->name);
count_fulltype_ref(&variables->type);
}
/* Inherited programs */
for (i=0; i< p->num_inherited; i++)
mark_program_ref(p->inherit[i].prog);
#ifdef USE_STRUCTS
/* struct definitions */
for (i = 0; i < p->num_structs; i++)
{
count_struct_type_ref(p->struct_defs[i].type);
}
#endif /* USE_STRUCTS */
/* Included files */
for (i=0; i< p->num_includes; i++)
{
string_t *str;
str = p->includes[i].name; MARK_MSTRING_REF(str);
str = p->includes[i].filename; MARK_MSTRING_REF(str);
}
}
else
{
if (!p->ref++)
{
dump_malloc_trace(1, p);
fatal("Program block %p '%s' referenced as something else\n"
, p, p->name ? get_txt(p->name) : "<null>");
}
}
} /* gc_mark_program_ref() */
/*-------------------------------------------------------------------------*/
static void
mark_object_ref (object_t *ob)
/* Mark the object <ob> as referenced and increase its refcount.
* This method should be called only for destructed objects and
* from the GC main loop for the initial count of live objects.
*/
{
MARK_PLAIN_REF(ob); ob->ref++;
if (ob->prog) mark_program_ref(ob->prog);
if (ob->name) MARK_MSTRING_REF(ob->name);
if (ob->load_name) MARK_MSTRING_REF(ob->load_name);
} /* mark_object_ref() */
/*-------------------------------------------------------------------------*/
void
gc_reference_destructed_object (object_t *ob)
/* Note the reference to a destructed object <ob>. The referee has to
* replace its reference by a svalue.number 0 since all these objects
* will be freed later.
*/
{
if (TEST_REF(ob))
{
if (ob->ref)
{
dump_malloc_trace(1, ob);
fatal("First reference to destructed object %p '%s', "
"but ref count %ld != 0\n"
, ob, ob->name ? get_txt(ob->name) : "<null>", (long)ob->ref
);
}
/* Destructed objects are not swapped */
ob->next_all = gc_obj_list_destructed;
gc_obj_list_destructed = ob;
mark_object_ref(ob);
}
else
{
if (!ob->ref)
{
write_malloc_trace(ob);
dump_malloc_trace(1, ob);
fatal("Destructed object %p '%s' referenced as something else\n"
, ob, ob->name ? get_txt(ob->name) : "<null>");
}
}
} /* gc_reference_destructed_object() */
/*-------------------------------------------------------------------------*/
static void
gc_MARK_MSTRING_REF (string_t * str)
/* Increment the refcount of mstring <str>. How it works:
* If MSTRING_REFS() is 0, the refcount either overflowed or it is
* the first visit to the block. If it's the first visit, CHECK_REF
* will return TRUE, otherwise we have an overflow and the MSTRING_REFS--
* will undo the ++ from earlier.
*/
{
if (CHECK_REF(str))
{
/* First visit to this block */
MSTRING_REFS(str)++;
}
else if (MSTRING_REFS(str))
{
/* Not the first visit, and refcounts didn't overrun either */
MSTRING_REFS(str)++;
if (!MSTRING_REFS(str))
{
/* Refcount overflow */
dprintf2(gout, "DEBUG: mark string: %x '%s' refcount reaches max!\n"
, (p_int)str, (p_int)str->txt);
}
}
} /* gc_MARK_MSTRING_REF(str) */
/*-------------------------------------------------------------------------*/
void
gc_count_ref_from_string (string_t *p)
/* Count the reference to mstring <p>.
*/
{
gc_MARK_MSTRING_REF(p);
} /* gc_count_ref_from_string() */
/*-------------------------------------------------------------------------*/
static void
clear_map_ref_filter (svalue_t *key, svalue_t *data, void *extra)
/* Auxiliary function to clear the refs in a mapping.
* It is called with the <key> and <data> vector, the latter of
* width (p_int)<extra>
*/
{
clear_ref_in_vector(key, 1);
clear_ref_in_vector(data, (size_t)extra);
} /* clear_map_ref_filter() */
/*-------------------------------------------------------------------------*/
void
clear_ref_in_vector (svalue_t *svp, size_t num)
/* Clear the refs of the <num> elements of vector <svp>.
*/
{
svalue_t *p;
if (!svp) /* e.g. when called for obj->variables */
return;
for (p = svp; p < svp+num; p++)
{
switch(p->type)
{
case T_OBJECT:
/* this might be a destructed object, which has it's ref not
* cleared by the obj_list because it is no longer a member
* Alas, swapped objects must not have prog->ref cleared.
*/
clear_object_ref(p->u.ob);
continue;
case T_STRING:
case T_SYMBOL:
clear_string_ref(p->u.str);
break;
case T_POINTER:
case T_QUOTED_ARRAY:
if (!p->u.vec->ref)
continue;
p->u.vec->ref = 0;
clear_ref_in_vector(&p->u.vec->item[0], VEC_SIZE(p->u.vec));
continue;
#ifdef USE_STRUCTS
case T_STRUCT:
clear_struct_ref(p->u.strct);
continue;
#endif /* USE_STRUCTS */
case T_MAPPING:
if (p->u.map->ref)
{
mapping_t *m;
p_int num_values;
#ifdef DEBUG
/* The initial cleanup phase should take care of compacting
* all dirty mappings, however just in case one slips
* through...
*/
if (p->u.map->hash != NULL)
dprintf1(gcollect_outfd
, "Mapping %x still has a hash part.\n"
, (p_int)p->u.map);
#endif
m = p->u.map;
m->ref = 0;
num_values = m->num_values;
walk_mapping(m, clear_map_ref_filter, (char *)num_values );
}
continue;
case T_CLOSURE:
if (CLOSURE_MALLOCED(p->x.closure_type))
{
lambda_t *l;
l = p->u.lambda;
if (l->ref)
{
l->ref = 0;
clear_ref_in_closure(l, p->x.closure_type);
}
}
else
clear_object_ref(p->u.ob);
continue;
}
}
} /* clear_ref_in_vector() */
/*-------------------------------------------------------------------------*/
void
gc_count_ref_in_vector (svalue_t *svp, size_t num
#ifdef CHECK_OBJECT_GC_REF
, const char * file, int line
#endif
)
/* Count the references the <num> elements of vector <p>.
*/
{
svalue_t *p;
if (!svp) /* e.g. when called for obj->variables */
return;
for (p = svp; p < svp+num; p++) {
switch(p->type)
{
case T_OBJECT:
{
object_t *ob;
ob = p->u.ob;
if (ob->flags & O_DESTRUCTED)
{
put_number(p, 0);
reference_destructed_object(ob);
}
else
{
ob->ref++;
}
continue;
}
case T_POINTER:
case T_QUOTED_ARRAY:
/* Don't use CHECK_REF on the null vector */
if (p->u.vec != &null_vector && CHECK_REF(p->u.vec))
{
count_array_size(p->u.vec);
#ifdef CHECK_OBJECT_GC_REF
gc_count_ref_in_vector(&p->u.vec->item[0], VEC_SIZE(p->u.vec), file, line);
#else
count_ref_in_vector(&p->u.vec->item[0], VEC_SIZE(p->u.vec));
#endif
}
p->u.vec->ref++;
continue;
#ifdef USE_STRUCTS
case T_STRUCT:
count_struct_ref(p->u.strct);
continue;
#endif /* USE_STRUCTS */
case T_MAPPING:
if (CHECK_REF(p->u.map))
{
mapping_t *m;
m = p->u.map;
count_ref_in_mapping(m);
count_mapping_size(m);
}
p->u.map->ref++;
continue;
case T_STRING:
MARK_MSTRING_REF(p->u.str);
continue;
case T_CLOSURE:
if (CLOSURE_MALLOCED(p->x.closure_type))
{
if (p->u.lambda->ref++ <= 0)
{
count_ref_in_closure(p);
}
}
else
{
object_t *ob;
ob = p->u.ob;
if (ob->flags & O_DESTRUCTED)
{
put_number(p, 0);
reference_destructed_object(ob);
}
else
{
ob->ref++;
}
}
continue;
case T_SYMBOL:
MARK_MSTRING_REF(p->u.str);
continue;
}
} /* for */
} /* gc_count_ref_in_vector() */
/*-------------------------------------------------------------------------*/
static void
mark_unreferenced_string (string_t *string)
/* If the shared string <string> stored in the memory block <start> is
* not referenced, it is deallocated.
*/
{
if (TEST_REF(string))
{
dprintf2(gout,
"tabled string %x '%s' was left unreferenced, freeing now.\n",
(p_int) string, (p_int)string->txt
);
MARK_REF(string);
MSTRING_REFS(string) = 0;
}
} /* mark_unreferenced_string() */
/*-------------------------------------------------------------------------*/
static void
gc_note_action_ref (action_t *p)
/* Mark the strings of function and verb of all sentences in list <p>.
*/
{
do {
if (p->function)
MARK_MSTRING_REF(p->function);
if (p->verb)
MARK_MSTRING_REF(p->verb);
note_ref(p);
} while ( NULL != (p = (action_t *)p->sent.next) );
}
#define note_action_ref(p) \
GC_REF_DUMP(action_t*, p, "Note action ref", gc_note_action_ref)
/*-------------------------------------------------------------------------*/
static void
gc_count_ref_in_closure (svalue_t *csvp)
/* Count the reference to closure <csvp> and all referenced data.
* Closures using a destructed object are stored in the stale_ lists
* for later removal (and .ref is set to -1).
*/
{
lambda_t *l = csvp->u.lambda;
ph_int type = csvp->x.closure_type;
if (!l->ref)
{
/* This closure was bound to a destructed object, and has been
* encountered before.
*/
l->ref--; /* Undo ref increment that was done by the caller */
if (type == CLOSURE_BOUND_LAMBDA)
{
csvp->x.closure_type = CLOSURE_UNBOUND_LAMBDA;
(csvp->u.lambda = l->function.lambda)->ref++;
}
else
{
put_number(csvp, 0);
}
return;
}
/* If the closure is bound, make sure that the object it is
* bound to really exists.
*/
if (type != CLOSURE_UNBOUND_LAMBDA)
{
object_t *ob;
ob = l->ob;
if (ob->flags & O_DESTRUCTED
|| ( type == CLOSURE_LFUN
&& l->function.lfun.ob->flags & O_DESTRUCTED) )
{
l->ref = -1;
if (type == CLOSURE_LAMBDA)
{
l->ob = (object_t *)stale_lambda_closures;
stale_lambda_closures = l;
}
else
{
l->ob = (object_t *)stale_misc_closures;
stale_misc_closures = l;
if (type == CLOSURE_LFUN)
{
if (l->function.lfun.ob->flags & O_DESTRUCTED)
{
reference_destructed_object(l->function.lfun.ob);
}
}
}
if (ob->flags & O_DESTRUCTED)
{
reference_destructed_object(ob);
}
if (type == CLOSURE_BOUND_LAMBDA)
{
csvp->x.closure_type = CLOSURE_UNBOUND_LAMBDA;
csvp->u.lambda = l->function.lambda;
}
else
{
put_number(csvp, 0);
}
}
else
{
/* Object exists: count reference */
ob->ref++;
if (type == CLOSURE_LFUN)
{
l->function.lfun.ob->ref++;
if(l->function.lfun.inhProg)
mark_program_ref(l->function.lfun.inhProg);
}
}
}
/* Count the references in the code of the closure */
if (l->prog_ob)
{
if (l->prog_ob->flags & O_DESTRUCTED)
{
reference_destructed_object(l->prog_ob);
l->prog_ob = NULL;
l->prog_pc = 0;
}
else
{
/* Object exists: count reference */
l->prog_ob->ref++;
}
}
if (CLOSURE_HAS_CODE(type))
{
mp_int num_values;
svalue_t *svp;
svp = (svalue_t *)l;
if ( (num_values = EXTRACT_UCHAR(l->function.code)) == 0xff)
num_values = svp[-0x100].u.number;
svp -= num_values;
note_ref(svp);
count_ref_in_vector(svp, (size_t)num_values);
}
else
{
note_ref(l);
if (type == CLOSURE_BOUND_LAMBDA)
{
lambda_t *l2 = l->function.lambda;
if (!l2->ref++) {
svalue_t sv;
sv.type = T_CLOSURE;
sv.x.closure_type = CLOSURE_UNBOUND_LAMBDA;
sv.u.lambda = l2;
count_ref_in_closure(&sv);
}
}
#ifdef USE_NEW_INLINES
if (type == CLOSURE_LFUN && l->function.lfun.context_size != 0)
{
unsigned short size = l->function.lfun.context_size;
l->function.lfun.context_size = 0; /* Prevent recursion */
count_ref_in_vector(l->context, size);
l->function.lfun.context_size = size;
}
#endif /* USE_NEW_INLINES */
}
} /* count_ref_in_closure() */
/*-------------------------------------------------------------------------*/
static void
clear_ref_in_closure (lambda_t *l, ph_int type)
/* Clear the references in closure <l> which is of type <type>.
*/
{
if (l->prog_ob)
clear_object_ref(l->prog_ob);
if (CLOSURE_HAS_CODE(type))
{
mp_int num_values;
svalue_t *svp;
svp = (svalue_t *)l;
if ( (num_values = EXTRACT_UCHAR(l->function.code)) == 0xff)
num_values = svp[-0x100].u.number;
svp -= num_values;
clear_ref_in_vector(svp, (size_t)num_values);
}
else if (type == CLOSURE_BOUND_LAMBDA)
{
lambda_t *l2 = l->function.lambda;
if (l2->ref) {
l2->ref = 0;
clear_ref_in_closure(l2, CLOSURE_UNBOUND_LAMBDA);
}
}
if (type != CLOSURE_UNBOUND_LAMBDA)
clear_object_ref(l->ob);
if (type == CLOSURE_LFUN)
{
clear_object_ref(l->function.lfun.ob);
if (l->function.lfun.inhProg)
clear_program_ref(l->function.lfun.inhProg, MY_TRUE);
}
#ifdef USE_NEW_INLINES
if (type == CLOSURE_LFUN && l->function.lfun.context_size != 0)
{
unsigned short size = l->function.lfun.context_size;
l->function.lfun.context_size = 0; /* Prevent recursion */
clear_ref_in_vector(l->context, size);
l->function.lfun.context_size = size;
}
#endif /* USE_NEW_INLINES */
} /* clear_ref_in_closure() */
/*-------------------------------------------------------------------------*/
void
restore_default_gc_log (void)
/* If gcollect_outfd was redirected to some other file, that file is
* closed and the default log file is restored.
*/
{
if (gcollect_outfd != default_gcollect_outfd)
{
if (gcollect_outfd != 1 && gcollect_outfd != 2)
close(gcollect_outfd);
gcollect_outfd = default_gcollect_outfd;
}
} /* restore_default_gc_log() */
/*-------------------------------------------------------------------------*/
void
new_default_gc_log (int fd)
/* Redirect the default and the current log file to file <fd>. If the
* current log file is identical to the default log file, it is
* redirected, too.
*/
{
if (default_gcollect_outfd != fd)
{
restore_default_gc_log();
if (default_gcollect_outfd != 1 && default_gcollect_outfd != 2)
close(default_gcollect_outfd);
default_gcollect_outfd = gcollect_outfd = fd;
}
} /* new_default_gc_log() */
/*-------------------------------------------------------------------------*/
void
garbage_collection(void)
/* The Mark-Sweep garbage collector.
*
* Free all possible memory, then loop through every object and variable
* in the game, check the reference counts and deallocate unused memory.
* This takes time and should not be used lightheartedly.
*
* The function must be called outside of LPC evaluations.
*/
{
object_t *ob, *next_ob;
lambda_t *l, *next_l;
int i;
long dobj_count;
if (gcollect_outfd != 1 && gcollect_outfd != 2)
{
dprintf1(gcollect_outfd, "\n%s --- Garbage Collection ---\n"
, (long)time_stamp());
}
/* --- Pass 0: dispose of some unnecessary stuff ---
*/
dobj_count = tot_alloc_object;
malloc_privilege = MALLOC_MASTER;
RESET_LIMITS;
CLEAR_EVAL_COST;
out_of_memory = MY_FALSE;
assert_master_ob_loaded();
malloc_privilege = MALLOC_SYSTEM;
/* Recover as much memory from temporaries as possible.
* However, don't call mb_release() yet as the swap buffer
* is still needed.
*/
if (obj_list_replace)
replace_programs();
handle_newly_destructed_objects();
free_save_object_buffers();
free_interpreter_temporaries();
#ifdef USE_ACTIONS
free_action_temporaries();
#endif
#ifdef USE_PGSQL
pg_purge_connections();
#endif /* USE_PGSQL */
remove_stale_player_data();
remove_stale_call_outs();
free_defines();
free_all_local_names();
remove_unknown_identifier();
check_wizlist_for_destr();
cleanup_all_objects();
if (current_error_trace)
{
free_array(current_error_trace);
current_error_trace = NULL;
}
if (uncaught_error_trace)
{
free_array(uncaught_error_trace);
uncaught_error_trace = NULL;
}
/* Lock all interactive structures (in case we're using threads)
* and dispose of the written buffers.
*/
for (i = 0 ; i < MAX_PLAYERS; i++)
{
if (all_players[i] == NULL)
continue;
interactive_lock(all_players[i]);
interactive_cleanup(all_players[i]);
}
remove_destructed_objects(MY_TRUE); /* After reducing all object references! */
if (dobj_count != tot_alloc_object)
{
dprintf2(gcollect_outfd, "%s GC pass 1: Freed %d objects.\n"
, (long)time_stamp(), dobj_count - tot_alloc_object);
}
#ifdef CHECK_OBJECT_REF
while (newly_destructed_obj_shadows != NULL)
{
object_shadow_t *sh = newly_destructed_obj_shadows;
newly_destructed_obj_shadows = sh->next;
xfree(sh);
}
while (destructed_obj_shadows != NULL)
{
object_shadow_t *sh = destructed_obj_shadows;
destructed_obj_shadows = sh->next;
xfree(sh);
}
#endif /* CHECK_OBJECT_REF */
/* --- Pass 1: clear the 'referenced' flag in all malloced blocks ---
*/
mem_clear_ref_flags();
/* --- Pass 2: clear the ref counts ---
*/
gc_status = gcClearRefs;
if (d_flag > 3)
{
debug_message("%s start of garbage_collection\n", time_stamp());
}
clear_array_size();
clear_mapping_size();
/* Process the list of all objects */
for (ob = obj_list; ob; ob = ob->next_all) {
int was_swapped;
Bool clear_prog_ref;
if (d_flag > 4)
{
debug_message("%s clearing refs for object '%s'\n"
, time_stamp(), get_txt(ob->name));
}
was_swapped = 0;
#if defined(CHECK_OBJECT_REF) && defined(DEBUG)
ob->extra_ref = ob->ref;
#endif
#ifdef USE_SWAP
if (ob->flags & O_SWAPPED
&& (was_swapped = load_ob_from_swap(ob)) & 1)
{
/* don't clear the program ref count. It is 1 */
clear_prog_ref = MY_FALSE;
}
else
#endif
{
/* Take special care of inherited programs, the associated
* objects might be destructed.
*/
clear_prog_ref = MY_TRUE;
}
#ifdef USE_SWAP
if (was_swapped < 0)
fatal("Totally out of MEMORY in GC: (swapping in '%s')\n"
, get_txt(ob->name));
#endif
clear_program_ref(ob->prog, clear_prog_ref);
ob->ref = 0;
clear_string_ref(ob->name);
clear_ref_in_vector(ob->variables, ob->prog->num_variables);
#ifdef USE_BUILTIN_EDITOR
# ifdef USE_PARANOIA
if (ob->flags & O_SHADOW)
{
ed_buffer_t *buf;
if ( NULL != (buf = O_GET_EDBUFFER(ob)) )
{
clear_ed_buffer_refs(buf);
} /* end of ed-buffer processing */
}
# endif
#endif
#ifdef USE_SWAP
if (was_swapped)
{
swap(ob, was_swapped);
}
#endif
}
if (d_flag > 3)
{
debug_message("%s ref counts referenced by obj_list cleared\n"
, time_stamp());
}
/* Process the interactives */
for(i = 0 ; i < MAX_PLAYERS; i++)
{
input_to_t * it;
if (all_players[i] == NULL)
continue;
#ifdef USE_PTHREADS
/* The threaded write buffers are allocated with malloc() and are
* thus out of our view.
*/
#endif /* USE_PTHREADS */
for ( it = all_players[i]->input_to; it != NULL; it = it->next)
{
clear_memory_reference(it);
clear_ref_in_callback(&(it->fun));
clear_ref_in_vector(&(it->prompt), 1);
}
#ifdef USE_TLS
if (all_players[i]->tls_cb != NULL)
{
clear_memory_reference(all_players[i]->tls_cb);
clear_ref_in_callback(all_players[i]->tls_cb);
}
#endif
clear_ref_in_vector(&all_players[i]->prompt, 1);
/* snoop_by and modify_command are known to be NULL or non-destructed
* objects.
*/
}
/* Process the driver hooks */
clear_ref_in_vector(driver_hook, NUM_DRIVER_HOOKS);
/* Let the modules process their data */
mstring_clear_refs();
clear_ref_from_wiz_list();
clear_ref_from_call_outs();
clear_ref_from_efuns();
#if defined(USE_PARSE_COMMAND)
clear_parse_refs();
#endif
clear_simul_efun_refs();
clear_interpreter_refs();
clear_comm_refs();
clear_rxcache_refs();
#ifdef USE_STRUCTS
clear_tabled_struct_refs();
#endif
#ifdef USE_PGSQL
pg_clear_refs();
#endif /* USE_PGSQL */
mb_clear_refs();
/* As this call also covers the swap buffer, it MUST come after
* processing (and potentially swapping) the objects.
*/
null_vector.ref = 0;
/* Finally, walk the list of destructed objects and clear all references
* in them.
*/
for (ob = destructed_objs; ob; ob = ob->next_all)
{
if (d_flag > 4)
{
debug_message("%s clearing refs for destructed object '%s'\n"
, time_stamp(), get_txt(ob->name));
}
if (ob->name)
clear_string_ref(ob->name);
if (ob->load_name)
clear_string_ref(ob->load_name);
ob->prog->ref = 0;
clear_program_ref(ob->prog, MY_TRUE);
ob->ref = 0;
}
/* --- Pass 3: Compute the ref counts, and set the 'referenced' flag where
* appropriate ---
*/
gc_status = gcCountRefs;
gc_obj_list_destructed = NULL;
stale_lambda_closures = NULL;
stale_misc_closures = NULL;
stale_mappings = NULL;
/* Handle the known destructed objects first, as later calls to
* reference_destructed_object() will clobber the list.
*/
for (ob = destructed_objs; ob; )
{
object_t *next = ob->next_all;
dprintf1(gcollect_outfd
, "Freeing destructed object '%s'\n"
, (p_int)get_txt(ob->name)
);
reference_destructed_object(ob); /* Clobbers .next_all */
ob = next;
}
num_destructed = 0;
destructed_objs = NULL;
/* Process the list of all objects.
*/
for (ob = obj_list; ob; ob = ob->next_all)
{
#ifdef USE_SWAP
int was_swapped;
was_swapped = 0;
if (ob->flags & O_SWAPPED)
{
was_swapped = load_ob_from_swap(ob);
if (was_swapped & 1)
{
#ifdef DUMP_GC_REFS
dprintf1(gcollect_outfd, "Clear ref of swapped-in program %x\n", (long)ob->prog);
#endif
CLEAR_REF(ob->prog);
ob->prog->ref = 0;
}
}
#endif
mark_object_ref(ob);
if (ob->prog->num_variables)
{
note_ref(ob->variables);
}
count_ref_in_vector(ob->variables, ob->prog->num_variables);
if (ob->sent)
{
sentence_t *sent;
#ifdef USE_BUILTIN_EDITOR
# ifdef USE_PARANOIA
ed_buffer_t *buf;
# endif
#endif
sent = ob->sent;
if (ob->flags & O_SHADOW)
{
note_ref(sent);
#ifdef USE_BUILTIN_EDITOR
# ifdef USE_PARANOIA
if ( NULL != (buf = ((shadow_t *)sent)->ed_buffer) )
{
note_ref(buf);
count_ed_buffer_refs(buf);
} /* end of ed-buffer processing */
# endif
#endif
/* If there is a ->ip, it will be processed as
* part of the player object handling below.
*/
sent = sent->next;
}
if (sent)
note_action_ref((action_t *)sent);
}
#ifdef USE_SWAP
if (was_swapped)
{
swap(ob, was_swapped);
}
#endif
}
if (d_flag > 3)
{
debug_message("%s obj_list evaluated\n", time_stamp());
}
/* Process the interactives. */
for(i = 0 ; i < MAX_PLAYERS; i++)
{
input_to_t * it;
if (all_players[i] == NULL)
continue;
note_ref(all_players[i]);
#ifdef USE_PTHREADS
/* The thread write buffers are allocated with malloc() and are
* thus out of our view.
*/
#endif /* USE_PTHREADS */
#ifdef USE_MCCP
if (all_players[i]->out_compress != NULL)
note_ref(all_players[i]->out_compress);
if (all_players[i]->out_compress_buf != NULL)
note_ref(all_players[i]->out_compress_buf);
#endif /* USE_MCCP */
/* There are no destructed interactives, or interactives
* referencing destructed objects.
*/
all_players[i]->ob->ref++;
#ifdef USE_SNOOPING
if ( NULL != (ob = all_players[i]->snoop_by) )
{
if (!O_IS_INTERACTIVE(ob))
{
ob->ref++;
}
} /* end of snoop-processing */
#endif
for ( it = all_players[i]->input_to; it != NULL; it = it->next)
{
note_ref(it);
count_ref_in_callback(&(it->fun));
count_ref_in_vector(&(it->prompt), 1);
} /* end of input_to processing */
#ifdef USE_TLS
if (all_players[i]->tls_cb != NULL)
{
note_ref(all_players[i]->tls_cb);
count_ref_in_callback(all_players[i]->tls_cb);
}
#endif
if ( NULL != (ob = all_players[i]->modify_command) )
{
ob->ref++;
}
count_ref_in_vector(&all_players[i]->prompt, 1);
if (all_players[i]->trace_prefix)
{
count_ref_from_string(all_players[i]->trace_prefix);
}
}
/* Let the modules process their data */
count_ref_from_wiz_list();
count_ref_from_call_outs();
count_ref_from_efuns();
if (master_ob)
master_ob->ref++;
else
fatal("No master object\n");
MARK_MSTRING_REF(master_name_str);
count_lex_refs();
count_compiler_refs();
count_simul_efun_refs();
#if defined(SUPPLY_PARSE_COMMAND)
count_old_parse_refs();
#endif
mstring_note_refs();
note_otable_ref();
count_comm_refs();
count_interpreter_refs();
count_heart_beat_refs();
count_rxcache_refs();
#ifdef USE_PGSQL
pg_count_refs();
#endif /* USE_PGSQL */
mb_note_refs();
if (reserved_user_area)
note_ref(reserved_user_area);
if (reserved_master_area)
note_ref(reserved_master_area);
if (reserved_system_area)
note_ref(reserved_system_area);
note_ref(mud_lib);
null_vector.ref++;
/* Process the driver hooks */
count_ref_in_vector(driver_hook, NUM_DRIVER_HOOKS);
gc_status = gcInactive;
/* --- Pass 4: remove unreferenced strings and struct types ---
*/
#ifdef USE_STRUCTS
remove_unreferenced_structs();
#endif
mstring_walk_table(mark_unreferenced_string);
mstring_gc_table();
/* --- Pass 5: Release all destructed objects ---
*
* It is vital that all information freed here is already known
* as referenced, so we won't free it a second time in pass 6.
*/
dobj_count = 0;
for (ob = gc_obj_list_destructed; ob; ob = next_ob)
{
next_ob = ob->next_all;
free_object(ob, "garbage collection");
dobj_count++;
}
for (l = stale_lambda_closures; l; )
{
svalue_t sv;
next_l = (lambda_t *)l->ob;
l->ref = 1;
sv.type = T_CLOSURE;
sv.x.closure_type = CLOSURE_UNBOUND_LAMBDA;
sv.u.lambda = l;
l = (lambda_t *)l->ob;
free_closure(&sv);
}
for (l = stale_misc_closures; l; l = next_l)
{
next_l = (lambda_t *)l->ob;
xfree((char *)l);
}
clean_stale_mappings();
/* --- Pass 6: Release all unused memory ---
*/
mem_free_unrefed_memory();
reallocate_reserved_areas();
if (!reserved_user_area)
{
svalue_t *res = NULL;
if (reserved_system_area)
{
RESET_LIMITS;
CLEAR_EVAL_COST;
malloc_privilege = MALLOC_MASTER;
res = callback_master(STR_QUOTA_DEMON, 0);
}
/* Once: remove_uids(res && (res->type != T_NUMBER || res->u.number) );
* but that function was never implemented.
*/
}
/* Release the memory from the buffers. Eventually it will be
* allocated again, but for now the point is to reduce the amount
* of allocated memory.
*/
mb_release();
/* Allow the memory manager to do some consolidation */
mem_consolidate(MY_TRUE);
/* Finally, try to reclaim the reserved areas */
reallocate_reserved_areas();
time_last_gc = time(NULL);
dprintf2(gcollect_outfd, "%s GC freed %d destructed objects.\n"
, (long)time_stamp(), dobj_count);
#if defined(CHECK_OBJECT_REF) && defined(DEBUG)
for (ob = obj_list; ob; ob = ob->next_all) {
if (ob->extra_ref != ob->ref
&& strchr(get_txt(ob->name), '#') == NULL
)
{
dprintf4(2, "DEBUG: GC object %x '%s': refs %d, extra_refs %d\n"
, (p_int)ob, (p_int)get_txt(ob->name), (p_int)ob->ref
, (p_int)ob->extra_ref);
}
}
#endif
/* Lock all interactive structures (in case we're using threads)
* and dispose of the written buffers.
*/
for (i = 0 ; i < MAX_PLAYERS; i++)
{
if (all_players[i] == NULL)
continue;
interactive_unlock(all_players[i]);
}
/* If the GC log was redirected, close that file and set the
* logging back to the default file.
*/
restore_default_gc_log();
} /* garbage_collection() */
#if defined(MALLOC_TRACE)
/* Some functions to print the tracing data from the memory blocks.
* The show_ functions are called from xmalloc directly.
*/
#ifdef USE_STRUCTS
static void show_struct(int d, void *block, int depth);
#endif /* USE_STRUCTS */
/*-------------------------------------------------------------------------*/
static void
show_string (int d, char *block, int depth UNUSED)
/* Print the string from memory <block> on filedescriptor <d>.
*/
{
#ifdef __MWERKS__
# pragma unused(depth)
#endif
size_t len;
if (block == NULL)
{
WRITES(d, "<null>");
}
else
{
WRITES(d, "\"");
if ((len = strlen(block)) < 70)
{
write(d, block, len);
WRITES(d, "\"");
}
else
{
write(d, block, 50);
WRITES(d, "\" (truncated, length ");writed(d, len);WRITES(d, ")");
}
}
} /* show_string() */
/*-------------------------------------------------------------------------*/
static void
show_mstring_data (int d, void *block, int depth UNUSED)
/* Print the stringdata from memory <block> on filedescriptor <d>.
*/
{
#ifdef __MWERKS__
# pragma unused(depth)
#endif
string_t *str;
str = (string_t *)block;
WRITES(d, "(");
writed(d, (p_uint)str->size);
WRITES(d, ")\"");
if (str->size < 50)
{
write(d, block, str->size);
WRITES(d, "\"");
}
else
{
write(d, block, 50);
WRITES(d, "\" (truncated)");
}
} /* show_mstring_data() */
/*-------------------------------------------------------------------------*/
static void
show_mstring (int d, void *block, int depth)
/* Print the mstring from memory <block> on filedescriptor <d>.
*/
{
if (block == NULL)
{
WRITES(d, "<null>");
}
else
{
string_t *str;
str = (string_t *)block;
if (str->info.tabled)
{
WRITES(d, "Tabled string: ");
show_mstring_data(d, str, depth);
}
else
{
WRITES(d, "Untabled string: ");
show_mstring_data(d, str, depth);
}
/* TODO: This is how it should be
* TODO:: show_mstring_data(d, str->str, depth);
* TODO:: alas it crashes the driver when destructed leaked objects
* TODO:: are found 'cause their name is no langer value (though
* TODO:: the reason for that is yet unknown). See 3.3.168 mails/bugs.
*/
}
} /* show_mstring() */
/*-------------------------------------------------------------------------*/
static void
show_object (int d, void *block, int depth)
/* Print the data about object <block> on filedescriptor <d>.
*/
{
object_t *ob;
ob = (object_t *)block;
if (depth) {
object_t *o;
for (o = obj_list; o && o != ob; o = o->next_all) NOOP;
if (!o || o->flags & O_DESTRUCTED) {
WRITES(d, "Destructed object in block 0x");
write_x(d, (p_uint)((unsigned *)block - xalloc_overhead()));
WRITES(d, "\n");
return;
}
}
WRITES(d, "Object: ");
if (ob->flags & O_DESTRUCTED)
WRITES(d, "(destructed) ");
show_mstring(d, ob->name, 0);
WRITES(d, " from ");
show_mstring(d, ob->load_name, 0);
WRITES(d, ", uid: ");
show_string(d, ob->user->name ? get_txt(ob->user->name) : "0", 0);
WRITES(d, "\n");
} /* show_object() */
/*-------------------------------------------------------------------------*/
static void
show_cl_literal (int d, void *block, int depth UNUSED)
/* Print the data about literal closure <block> on filedescriptor <d>.
*/
{
#ifdef __MWERKS__
# pragma unused(depth)
#endif
lambda_t *l;
object_t *obj;
l = (lambda_t *)block;
WRITES(d, "Closure literal: Object ");
obj = l->ob;
if (obj)
{
if (obj->name)
show_mstring(d, obj->name, 0);
else
WRITES(d, "(no name)");
if (obj->flags & O_DESTRUCTED)
WRITES(d, " (destructed)");
}
else
WRITES(d, "<null>");
WRITES(d, ", index ");
writed(d, l->function.var_index);
WRITES(d, ", ref ");
writed(d, l->ref);
WRITES(d, "\n");
} /* show_cl_literal() */
/*-------------------------------------------------------------------------*/
static void
show_array(int d, void *block, int depth)
/* Print the array at recursion <depth> from memory <block> on
* filedescriptor <d>. Recursive printing stops at <depth> == 2.
*/
{
vector_t *a;
mp_int i, j;
svalue_t *svp;
wiz_list_t *user = NULL;
mp_int a_size;
a = (vector_t *)block;
/* Can't use VEC_SIZE() here, as the memory block may have been
* partly overwritten by the malloc pointers already.
*/
a_size = (mp_int)( xalloced_size(a)
- ( xalloc_overhead() +
( sizeof(vector_t) - sizeof(svalue_t) )
)
) / (sizeof(svalue_t));
if (depth && a != &null_vector)
{
int freed;
wiz_list_t *wl;
wl = NULL;
freed = is_freed(block, sizeof(vector_t) );
if (!freed)
{
user = a->user;
wl = all_wiz;
if (user)
for ( ; wl && wl != user; wl = wl->next) NOOP;
}
if (freed || !wl || a_size <= 0 || a_size > MAX_ARRAY_SIZE
|| xalloced_size((char *)a) - xalloc_overhead() !=
sizeof(vector_t) + sizeof(svalue_t) * (a_size - 1) )
{
WRITES(d, "Array in freed block 0x");
write_x(d, (p_uint)((unsigned *)block - xalloc_overhead()));
WRITES(d, "\n");
return;
}
}
else
{
user = a->user;
}
WRITES(d, "Array ");
write_x(d, (p_int)a);
WRITES(d, " size ");
writed(d, (p_uint)a_size);
WRITES(d, ", uid: ");
show_string(d, user ? (user->name ? get_txt(user->name) : "<null>")
:"0", 0);
WRITES(d, "\n");
if (depth > 2)
return;
i = 32 >> depth;
if (i > a_size)
i = a_size;
for (svp = a->item; --i >= 0; svp++)
{
for (j = depth + 1; --j >= 0;) WRITES(d, " ");
switch(svp->type)
{
case T_POINTER:
show_array(d, (char *)svp->u.vec, depth+1);
break;
#ifdef USE_STRUCTS
case T_STRUCT:
show_struct(d, (char *)svp->u.strct, depth+1);
break;
#endif /* USE_STRUCTS */
case T_NUMBER:
writed(d, (p_uint)svp->u.number);
WRITES(d, "\n");
break;
case T_STRING:
if (is_freed(svp->u.str, 1) )
{
WRITES(d, "String in freed block 0x");
write_x(d, (p_uint)((unsigned *)block - xalloc_overhead()));
WRITES(d, "\n");
break;
}
WRITES(d, "String: ");
show_mstring(d, svp->u.str, 0);
WRITES(d, "\n");
break;
case T_CLOSURE:
if (svp->x.closure_type == CLOSURE_LFUN
|| svp->x.closure_type == CLOSURE_IDENTIFIER)
show_cl_literal(d, (char *)svp->u.lambda, depth);
else
{
WRITES(d, "Closure type ");
writed(d, svp->x.closure_type);
WRITES(d, "\n");
}
break;
case T_OBJECT:
show_object(d, (char *)svp->u.ob, 1);
break;
default:
WRITES(d, "Svalue type ");writed(d, svp->type);WRITES(d, "\n");
break;
}
}
} /* show_array() */
#ifdef USE_STRUCTS
/*-------------------------------------------------------------------------*/
static void
show_struct(int d, void *block, int depth)
/* Print the struct at recursion <depth> from memory <block> on
* filedescriptor <d>. Recursive printing stops at <depth> == 2.
*/
{
struct_t *a;
mp_int i, j;
svalue_t *svp;
wiz_list_t *user;
mp_int a_size;
user = NULL;
a = (struct_t *)block;
/* Can't use struct_size() here, as the memory block may have been
* partly overwritten by the smalloc pointers already.
*/
a_size = (mp_int)( xalloced_size(a)
- ( xalloc_overhead() +
( sizeof(struct_t) - sizeof(svalue_t) ) / SIZEOF_CHAR_P
)
) / (sizeof(svalue_t)/SIZEOF_CHAR_P);
if (depth)
{
int freed;
wiz_list_t *wl;
wl = NULL;
freed = is_freed(block, sizeof(vector_t) );
if (!freed)
{
user = a->user;
wl = all_wiz;
if (user)
for ( ; wl && wl != user; wl = wl->next) NOOP;
}
if (freed || !wl || a_size <= 0
|| (xalloced_size((char *)a) - xalloc_overhead()) << 2 !=
sizeof(struct_t) + sizeof(svalue_t) * (a_size - 1) )
{
WRITES(d, "struct in freed block 0x");
write_x(d, (p_uint)((unsigned *)block - xalloc_overhead()));
WRITES(d, "\n");
return;
}
}
else
{
user = a->user;
}
WRITES(d, "struct ");
write_x(d, (p_int)a);
WRITES(d, " size ");writed(d, (p_uint)a_size);
WRITES(d, ", uid: ");
show_string(d, user ? (user->name ? get_txt(user->name) : "<null>")
: "0", 0);
WRITES(d, "\n");
if (depth > 2)
return;
i = 32 >> depth;
if (i > a_size)
i = a_size;
for (svp = a->member; --i >= 0; svp++)
{
for (j = depth + 1; --j >= 0;) WRITES(d, " ");
switch(svp->type)
{
case T_POINTER:
show_array(d, (char *)svp->u.vec, depth+1);
break;
case T_STRUCT:
show_struct(d, (char *)svp->u.strct, depth+1);
break;
case T_NUMBER:
writed(d, (p_uint)svp->u.number);
WRITES(d, "\n");
break;
case T_STRING:
if (is_freed(svp->u.str, 1) )
{
WRITES(d, "String in freed block 0x");
write_x(d, (p_uint)((unsigned *)block - xalloc_overhead()));
WRITES(d, "\n");
break;
}
WRITES(d, "String: ");
show_mstring(d, svp->u.str, 0);
WRITES(d, "\n");
break;
case T_CLOSURE:
if (svp->x.closure_type == CLOSURE_IDENTIFIER)
show_cl_literal(d, (char *)svp->u.lambda, depth);
else
{
WRITES(d, "Closure type ");
writed(d, svp->x.closure_type);
WRITES(d, "\n");
}
break;
case T_OBJECT:
show_object(d, (char *)svp->u.ob, 1);
break;
default:
WRITES(d, "Svalue type ");writed(d, svp->type);WRITES(d, "\n");
break;
}
}
} /* show_struct() */
#endif /* USE_STRUCTS */
/*-------------------------------------------------------------------------*/
void
setup_print_block_dispatcher (void)
/* Setup the tracing data dispatcher in xmalloc with the show_ functions
* above. Remember that the data dispatcher works by storing the file
* and line information of sample allocations. We just have to make sure
* to cover all possible allocation locations (with the string module and
* its pervasive inlining this is not easy).
*
* This is here because I like to avoid xmalloc calling closures, and
* gcollect.c is already notorious for including almost every header file
* anyway.
*/
{
svalue_t tmp_closure;
vector_t *a, *b;
assert_master_ob_loaded();
#if 0
/* Since the strings store the location of the call to the function
* which in turn called the string module function, the print
* block dispatcher won't be able to recognize them.
*/
store_print_block_dispatch_info(STR_EMPTY, show_mstring);
store_print_block_dispatch_info(STR_EMPTY->str, show_mstring_data);
str = mstring_alloc_string(1);
store_print_block_dispatch_info(str, show_mstring);
store_print_block_dispatch_info(str->str, show_mstring_data);
mstring_free(str);
str = mstring_new_string("\t");
store_print_block_dispatch_info(str, show_mstring);
store_print_block_dispatch_info(str->str, show_mstring_data);
str = mstring_table_inplace(str);
store_print_block_dispatch_info(str->link, show_mstring);
mstring_free(str);
#endif
a = allocate_array(1);
store_print_block_dispatch_info((char *)a, show_array);
b = slice_array(a, 0, 0);
store_print_block_dispatch_info((char *)b, show_array);
free_array(a);
free_array(b);
store_print_block_dispatch_info((char *)master_ob, show_object);
#ifdef CHECK_OBJECT_GC_REF
note_object_allocation_info((char*)master_ob);
note_program_allocation_info((char*)(master_ob->prog));
#endif
tmp_closure.type = T_CLOSURE;
tmp_closure.x.closure_type = CLOSURE_EFUN + F_ALLOCATE;
tmp_closure.u.ob = master_ob;
push_number(inter_sp, 1);
call_lambda(&tmp_closure, 1);
store_print_block_dispatch_info(inter_sp->u.vec, show_array);
free_svalue(inter_sp--);
current_object = master_ob;
#ifdef USE_NEW_INLINES
closure_literal(&tmp_closure, 0, 0, 0);
#else
closure_literal(&tmp_closure, 0, 0);
#endif /* USE_NEW_INLINES */
store_print_block_dispatch_info(tmp_closure.u.lambda, show_cl_literal);
free_svalue(&tmp_closure);
}
#endif /* MALLOC_TRACE */
#endif /* GC_SUPPORT */
/*=========================================================================*/
/* Default functions when the allocator doesn't support GC.
*/
#if !defined(GC_SUPPORT)
void
garbage_collection (void)
/* Free as much memory as possible and try to reallocate the
* reserved areas - that's all we can do.
*/
{
assert_master_ob_loaded();
handle_newly_destructed_objects();
free_save_object_buffers();
free_interpreter_temporaries();
#ifdef USE_ACTIONS
free_action_temporaries();
#endif
#ifdef USE_PGSQL
pg_purge_connections();
#endif /* USE_PGSQL */
remove_stale_player_data();
remove_stale_call_outs();
mb_release();
free_defines();
free_all_local_names();
remove_unknown_identifier();
check_wizlist_for_destr();
cleanup_all_objects();
if (current_error_trace)
{
free_array(current_error_trace);
current_error_trace = NULL;
}
if (uncaught_error_trace)
{
free_array(uncaught_error_trace);
uncaught_error_trace = NULL;
}
remove_destructed_objects(MY_TRUE);
reallocate_reserved_areas();
time_last_gc = time(NULL);
}
#endif /* GC_SUPPORT */
#if !defined(MALLOC_TRACE) || !defined(GC_SUPPORT)
void setup_print_block_dispatcher (void) { NOOP }
#endif
/***************************************************************************/
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