#include "config.h"
#include "system.h"
#include "coretypes.h"
#include "hashtab.h"
#include "ggc.h"
#include "toplev.h"
#include "params.h"
#include "hosthooks.h"
#include "hosthooks-def.h"
#ifdef HAVE_SYS_RESOURCE_H
# include <sys/resource.h>
#endif
#ifdef HAVE_MMAP_FILE
# include <sys/mman.h>
# ifdef HAVE_MINCORE
# include <sys/types.h>
# endif
#endif
#ifndef MAP_FAILED
# define MAP_FAILED ((void *)-1)
#endif
#ifdef ENABLE_VALGRIND_CHECKING
# ifdef HAVE_VALGRIND_MEMCHECK_H
# include <valgrind/memcheck.h>
# elif defined HAVE_MEMCHECK_H
# include <memcheck.h>
# else
# include <valgrind.h>
# endif
#else
#define VALGRIND_DISCARD(x)
#endif
bool ggc_force_collect;
static ggc_statistics *ggc_stats;
struct traversal_state;
static int ggc_htab_delete (void **, void *);
static hashval_t saving_htab_hash (const void *);
static int saving_htab_eq (const void *, const void *);
static int call_count (void **, void *);
static int call_alloc (void **, void *);
static int compare_ptr_data (const void *, const void *);
static void relocate_ptrs (void *, void *);
static void write_pch_globals (const struct ggc_root_tab * const *tab,
struct traversal_state *state);
static double ggc_rlimit_bound (double);
static int
ggc_htab_delete (void **slot, void *info)
{
const struct ggc_cache_tab *r = (const struct ggc_cache_tab *) info;
if (! (*r->marked_p) (*slot))
htab_clear_slot (*r->base, slot);
else
(*r->cb) (*slot);
return 1;
}
void
ggc_mark_roots (void)
{
const struct ggc_root_tab *const *rt;
const struct ggc_root_tab *rti;
const struct ggc_cache_tab *const *ct;
const struct ggc_cache_tab *cti;
size_t i;
for (rt = gt_ggc_deletable_rtab; *rt; rt++)
for (rti = *rt; rti->base != NULL; rti++)
memset (rti->base, 0, rti->stride);
for (rt = gt_ggc_rtab; *rt; rt++)
for (rti = *rt; rti->base != NULL; rti++)
for (i = 0; i < rti->nelt; i++)
(*rti->cb)(*(void **)((char *)rti->base + rti->stride * i));
ggc_mark_stringpool ();
for (ct = gt_ggc_cache_rtab; *ct; ct++)
for (cti = *ct; cti->base != NULL; cti++)
if (*cti->base)
{
ggc_set_mark (*cti->base);
htab_traverse_noresize (*cti->base, ggc_htab_delete, (void *) cti);
ggc_set_mark ((*cti->base)->entries);
}
}
void *
ggc_alloc_cleared_stat (size_t size MEM_STAT_DECL)
{
void *buf = ggc_alloc_stat (size PASS_MEM_STAT);
memset (buf, 0, size);
return buf;
}
void *
ggc_realloc_stat (void *x, size_t size MEM_STAT_DECL)
{
void *r;
size_t old_size;
if (x == NULL)
return ggc_alloc_stat (size PASS_MEM_STAT);
old_size = ggc_get_size (x);
if (size <= old_size)
{
VALGRIND_DISCARD (VALGRIND_MAKE_NOACCESS ((char *) x + size,
old_size - size));
VALGRIND_DISCARD (VALGRIND_MAKE_READABLE (x, size));
return x;
}
r = ggc_alloc_stat (size PASS_MEM_STAT);
VALGRIND_DISCARD (VALGRIND_MAKE_READABLE (x, old_size));
memcpy (r, x, old_size);
ggc_free (x);
return r;
}
void *
ggc_calloc (size_t s1, size_t s2)
{
return ggc_alloc_cleared (s1 * s2);
}
void *
ggc_splay_alloc (int sz, void *nl)
{
gcc_assert (!nl);
return ggc_alloc (sz);
}
void
ggc_splay_dont_free (void * x ATTRIBUTE_UNUSED, void *nl)
{
gcc_assert (!nl);
}
#define SCALE(x) ((unsigned long) ((x) < 1024*10 \
? (x) \
: ((x) < 1024*1024*10 \
? (x) / 1024 \
: (x) / (1024*1024))))
#define LABEL(x) ((x) < 1024*10 ? ' ' : ((x) < 1024*1024*10 ? 'k' : 'M'))
void
ggc_print_common_statistics (FILE *stream ATTRIBUTE_UNUSED,
ggc_statistics *stats)
{
ggc_stats = stats;
ggc_collect ();
ggc_stats = NULL;
}
static htab_t saving_htab;
struct ptr_data
{
void *obj;
void *note_ptr_cookie;
gt_note_pointers note_ptr_fn;
gt_handle_reorder reorder_fn;
size_t size;
void *new_addr;
};
#define POINTER_HASH(x) (hashval_t)((long)x >> 3)
int
gt_pch_note_object (void *obj, void *note_ptr_cookie,
gt_note_pointers note_ptr_fn)
{
struct ptr_data **slot;
if (obj == NULL || obj == (void *) 1)
return 0;
slot = (struct ptr_data **)
htab_find_slot_with_hash (saving_htab, obj, POINTER_HASH (obj),
INSERT);
if (*slot != NULL)
{
gcc_assert ((*slot)->note_ptr_fn == note_ptr_fn
&& (*slot)->note_ptr_cookie == note_ptr_cookie);
return 0;
}
*slot = xcalloc (sizeof (struct ptr_data), 1);
(*slot)->obj = obj;
(*slot)->note_ptr_fn = note_ptr_fn;
(*slot)->note_ptr_cookie = note_ptr_cookie;
if (note_ptr_fn == gt_pch_p_S)
(*slot)->size = strlen (obj) + 1;
else
(*slot)->size = ggc_get_size (obj);
return 1;
}
void
gt_pch_note_reorder (void *obj, void *note_ptr_cookie,
gt_handle_reorder reorder_fn)
{
struct ptr_data *data;
if (obj == NULL || obj == (void *) 1)
return;
data = htab_find_with_hash (saving_htab, obj, POINTER_HASH (obj));
gcc_assert (data && data->note_ptr_cookie == note_ptr_cookie);
data->reorder_fn = reorder_fn;
}
static hashval_t
saving_htab_hash (const void *p)
{
return POINTER_HASH (((struct ptr_data *)p)->obj);
}
static int
saving_htab_eq (const void *p1, const void *p2)
{
return ((struct ptr_data *)p1)->obj == p2;
}
struct traversal_state
{
FILE *f;
struct ggc_pch_data *d;
size_t count;
struct ptr_data **ptrs;
size_t ptrs_i;
};
static int
call_count (void **slot, void *state_p)
{
struct ptr_data *d = (struct ptr_data *)*slot;
struct traversal_state *state = (struct traversal_state *)state_p;
ggc_pch_count_object (state->d, d->obj, d->size, d->note_ptr_fn == gt_pch_p_S);
state->count++;
return 1;
}
static int
call_alloc (void **slot, void *state_p)
{
struct ptr_data *d = (struct ptr_data *)*slot;
struct traversal_state *state = (struct traversal_state *)state_p;
d->new_addr = ggc_pch_alloc_object (state->d, d->obj, d->size, d->note_ptr_fn == gt_pch_p_S);
state->ptrs[state->ptrs_i++] = d;
return 1;
}
static int
compare_ptr_data (const void *p1_p, const void *p2_p)
{
struct ptr_data *p1 = *(struct ptr_data *const *)p1_p;
struct ptr_data *p2 = *(struct ptr_data *const *)p2_p;
return (((size_t)p1->new_addr > (size_t)p2->new_addr)
- ((size_t)p1->new_addr < (size_t)p2->new_addr));
}
static void
relocate_ptrs (void *ptr_p, void *state_p)
{
void **ptr = (void **)ptr_p;
struct traversal_state *state ATTRIBUTE_UNUSED
= (struct traversal_state *)state_p;
struct ptr_data *result;
if (*ptr == NULL || *ptr == (void *)1)
return;
result = htab_find_with_hash (saving_htab, *ptr, POINTER_HASH (*ptr));
gcc_assert (result);
*ptr = result->new_addr;
}
static void
write_pch_globals (const struct ggc_root_tab * const *tab,
struct traversal_state *state)
{
const struct ggc_root_tab *const *rt;
const struct ggc_root_tab *rti;
size_t i;
for (rt = tab; *rt; rt++)
for (rti = *rt; rti->base != NULL; rti++)
for (i = 0; i < rti->nelt; i++)
{
void *ptr = *(void **)((char *)rti->base + rti->stride * i);
struct ptr_data *new_ptr;
if (ptr == NULL || ptr == (void *)1)
{
if (fwrite (&ptr, sizeof (void *), 1, state->f)
!= 1)
fatal_error ("can't write PCH file: %m");
}
else
{
new_ptr = htab_find_with_hash (saving_htab, ptr,
POINTER_HASH (ptr));
if (fwrite (&new_ptr->new_addr, sizeof (void *), 1, state->f)
!= 1)
fatal_error ("can't write PCH file: %m");
}
}
}
struct mmap_info
{
size_t offset;
size_t size;
void *preferred_base;
};
void
gt_pch_save (FILE *f)
{
const struct ggc_root_tab *const *rt;
const struct ggc_root_tab *rti;
size_t i;
struct traversal_state state;
char *this_object = NULL;
size_t this_object_size = 0;
struct mmap_info mmi;
const size_t mmap_offset_alignment = host_hooks.gt_pch_alloc_granularity();
gt_pch_save_stringpool ();
saving_htab = htab_create (50000, saving_htab_hash, saving_htab_eq, free);
for (rt = gt_ggc_rtab; *rt; rt++)
for (rti = *rt; rti->base != NULL; rti++)
for (i = 0; i < rti->nelt; i++)
(*rti->pchw)(*(void **)((char *)rti->base + rti->stride * i));
for (rt = gt_pch_cache_rtab; *rt; rt++)
for (rti = *rt; rti->base != NULL; rti++)
for (i = 0; i < rti->nelt; i++)
(*rti->pchw)(*(void **)((char *)rti->base + rti->stride * i));
state.f = f;
state.d = init_ggc_pch();
state.count = 0;
htab_traverse (saving_htab, call_count, &state);
mmi.size = ggc_pch_total_size (state.d);
mmi.preferred_base = host_hooks.gt_pch_get_address (mmi.size, fileno (f));
ggc_pch_this_base (state.d, mmi.preferred_base);
state.ptrs = xmalloc (state.count * sizeof (*state.ptrs));
state.ptrs_i = 0;
htab_traverse (saving_htab, call_alloc, &state);
qsort (state.ptrs, state.count, sizeof (*state.ptrs), compare_ptr_data);
for (rt = gt_pch_scalar_rtab; *rt; rt++)
for (rti = *rt; rti->base != NULL; rti++)
if (fwrite (rti->base, rti->stride, 1, f) != 1)
fatal_error ("can't write PCH file: %m");
write_pch_globals (gt_ggc_rtab, &state);
write_pch_globals (gt_pch_cache_rtab, &state);
ggc_pch_prepare_write (state.d, state.f);
{
long o;
o = ftell (state.f) + sizeof (mmi);
if (o == -1)
fatal_error ("can't get position in PCH file: %m");
mmi.offset = mmap_offset_alignment - o % mmap_offset_alignment;
if (mmi.offset == mmap_offset_alignment)
mmi.offset = 0;
mmi.offset += o;
}
if (fwrite (&mmi, sizeof (mmi), 1, state.f) != 1)
fatal_error ("can't write PCH file: %m");
if (mmi.offset != 0
&& fseek (state.f, mmi.offset, SEEK_SET) != 0)
fatal_error ("can't write padding to PCH file: %m");
for (i = 0; i < state.count; i++)
{
if (this_object_size < state.ptrs[i]->size)
{
this_object_size = state.ptrs[i]->size;
this_object = xrealloc (this_object, this_object_size);
}
memcpy (this_object, state.ptrs[i]->obj, state.ptrs[i]->size);
if (state.ptrs[i]->reorder_fn != NULL)
state.ptrs[i]->reorder_fn (state.ptrs[i]->obj,
state.ptrs[i]->note_ptr_cookie,
relocate_ptrs, &state);
state.ptrs[i]->note_ptr_fn (state.ptrs[i]->obj,
state.ptrs[i]->note_ptr_cookie,
relocate_ptrs, &state);
ggc_pch_write_object (state.d, state.f, state.ptrs[i]->obj,
state.ptrs[i]->new_addr, state.ptrs[i]->size,
state.ptrs[i]->note_ptr_fn == gt_pch_p_S);
if (state.ptrs[i]->note_ptr_fn != gt_pch_p_S)
memcpy (state.ptrs[i]->obj, this_object, state.ptrs[i]->size);
}
ggc_pch_finish (state.d, state.f);
gt_pch_fixup_stringpool ();
free (state.ptrs);
htab_delete (saving_htab);
}
void
gt_pch_restore (FILE *f)
{
const struct ggc_root_tab *const *rt;
const struct ggc_root_tab *rti;
size_t i;
struct mmap_info mmi;
int result;
for (rt = gt_ggc_deletable_rtab; *rt; rt++)
for (rti = *rt; rti->base != NULL; rti++)
memset (rti->base, 0, rti->stride);
for (rt = gt_pch_scalar_rtab; *rt; rt++)
for (rti = *rt; rti->base != NULL; rti++)
if (fread (rti->base, rti->stride, 1, f) != 1)
fatal_error ("can't read PCH file: %m");
for (rt = gt_ggc_rtab; *rt; rt++)
for (rti = *rt; rti->base != NULL; rti++)
for (i = 0; i < rti->nelt; i++)
if (fread ((char *)rti->base + rti->stride * i,
sizeof (void *), 1, f) != 1)
fatal_error ("can't read PCH file: %m");
for (rt = gt_pch_cache_rtab; *rt; rt++)
for (rti = *rt; rti->base != NULL; rti++)
for (i = 0; i < rti->nelt; i++)
if (fread ((char *)rti->base + rti->stride * i,
sizeof (void *), 1, f) != 1)
fatal_error ("can't read PCH file: %m");
if (fread (&mmi, sizeof (mmi), 1, f) != 1)
fatal_error ("can't read PCH file: %m");
result = host_hooks.gt_pch_use_address (mmi.preferred_base, mmi.size,
fileno (f), mmi.offset);
if (result < 0)
fatal_error ("had to relocate PCH");
if (result == 0)
{
if (fseek (f, mmi.offset, SEEK_SET) != 0
|| fread (mmi.preferred_base, mmi.size, 1, f) != 1)
fatal_error ("can't read PCH file: %m");
}
else if (fseek (f, mmi.offset + mmi.size, SEEK_SET) != 0)
fatal_error ("can't read PCH file: %m");
ggc_pch_read (f, mmi.preferred_base);
gt_pch_restore_stringpool ();
}
void *
default_gt_pch_get_address (size_t size ATTRIBUTE_UNUSED,
int fd ATTRIBUTE_UNUSED)
{
return NULL;
}
int
default_gt_pch_use_address (void *base, size_t size, int fd ATTRIBUTE_UNUSED,
size_t offset ATTRIBUTE_UNUSED)
{
void *addr = xmalloc (size);
return (addr == base) - 1;
}
size_t
default_gt_pch_alloc_granularity (void)
{
return getpagesize();
}
#if HAVE_MMAP_FILE
void *
mmap_gt_pch_get_address (size_t size, int fd)
{
void *ret;
ret = mmap (NULL, size, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0);
if (ret == (void *) MAP_FAILED)
ret = NULL;
else
munmap (ret, size);
return ret;
}
int
mmap_gt_pch_use_address (void *base, size_t size, int fd, size_t offset)
{
void *addr;
if (size == 0)
return -1;
addr = mmap (base, size, PROT_READ | PROT_WRITE, MAP_PRIVATE,
fd, offset);
return addr == base ? 1 : -1;
}
#endif
static double
ggc_rlimit_bound (double limit)
{
#if defined(HAVE_GETRLIMIT)
struct rlimit rlim;
# if defined (RLIMIT_AS)
if (getrlimit (RLIMIT_AS, &rlim) == 0
&& rlim.rlim_cur != (rlim_t) RLIM_INFINITY
&& rlim.rlim_cur < limit)
limit = rlim.rlim_cur;
# elif defined (RLIMIT_DATA)
if (getrlimit (RLIMIT_DATA, &rlim) == 0
&& rlim.rlim_cur != (rlim_t) RLIM_INFINITY
&& rlim.rlim_cur < limit
&& rlim.rlim_cur >= 8 * 1024 * 1024)
limit = rlim.rlim_cur;
# endif
#endif
return limit;
}
int
ggc_min_expand_heuristic (void)
{
double min_expand = physmem_total();
min_expand = ggc_rlimit_bound (min_expand);
min_expand /= 1024*1024*1024;
min_expand *= 70;
min_expand = MIN (min_expand, 70);
min_expand += 30;
return min_expand;
}
int
ggc_min_heapsize_heuristic (void)
{
double phys_kbytes = physmem_total();
double limit_kbytes = ggc_rlimit_bound (phys_kbytes * 2);
phys_kbytes /= 1024;
limit_kbytes /= 1024;
phys_kbytes /= 8;
#if defined(HAVE_GETRLIMIT) && defined (RLIMIT_RSS)
{
struct rlimit rlim;
if (getrlimit (RLIMIT_RSS, &rlim) == 0
&& rlim.rlim_cur != (rlim_t) RLIM_INFINITY)
phys_kbytes = MIN (phys_kbytes, rlim.rlim_cur / 1024);
}
# endif
limit_kbytes = MAX (0, limit_kbytes - 16 * 1024);
limit_kbytes = (limit_kbytes * 100) / (110 + ggc_min_expand_heuristic());
phys_kbytes = MIN (phys_kbytes, limit_kbytes);
phys_kbytes = MAX (phys_kbytes, 4 * 1024);
phys_kbytes = MIN (phys_kbytes, 128 * 1024);
return phys_kbytes;
}
void
init_ggc_heuristics (void)
{
#if !defined ENABLE_GC_CHECKING && !defined ENABLE_GC_ALWAYS_COLLECT
set_param_value ("ggc-min-expand", ggc_min_expand_heuristic());
set_param_value ("ggc-min-heapsize", ggc_min_heapsize_heuristic());
#endif
}
#ifdef GATHER_STATISTICS
struct loc_descriptor
{
const char *file;
int line;
const char *function;
int times;
size_t allocated;
size_t overhead;
size_t freed;
size_t collected;
};
static htab_t loc_hash;
static hashval_t
hash_descriptor (const void *p)
{
const struct loc_descriptor *d = p;
return htab_hash_pointer (d->function) | d->line;
}
static int
eq_descriptor (const void *p1, const void *p2)
{
const struct loc_descriptor *d = p1;
const struct loc_descriptor *d2 = p2;
return (d->file == d2->file && d->line == d2->line
&& d->function == d2->function);
}
static htab_t ptr_hash;
struct ptr_hash_entry
{
void *ptr;
struct loc_descriptor *loc;
size_t size;
};
static hashval_t
hash_ptr (const void *p)
{
const struct ptr_hash_entry *d = p;
return htab_hash_pointer (d->ptr);
}
static int
eq_ptr (const void *p1, const void *p2)
{
const struct ptr_hash_entry *p = p1;
return (p->ptr == p2);
}
static struct loc_descriptor *
loc_descriptor (const char *name, int line, const char *function)
{
struct loc_descriptor loc;
struct loc_descriptor **slot;
loc.file = name;
loc.line = line;
loc.function = function;
if (!loc_hash)
loc_hash = htab_create (10, hash_descriptor, eq_descriptor, NULL);
slot = (struct loc_descriptor **) htab_find_slot (loc_hash, &loc, 1);
if (*slot)
return *slot;
*slot = xcalloc (sizeof (**slot), 1);
(*slot)->file = name;
(*slot)->line = line;
(*slot)->function = function;
return *slot;
}
void
ggc_record_overhead (size_t allocated, size_t overhead, void *ptr,
const char *name, int line, const char *function)
{
struct loc_descriptor *loc = loc_descriptor (name, line, function);
struct ptr_hash_entry *p = xmalloc (sizeof (struct ptr_hash_entry));
PTR *slot;
p->ptr = ptr;
p->loc = loc;
p->size = allocated + overhead;
if (!ptr_hash)
ptr_hash = htab_create (10, hash_ptr, eq_ptr, NULL);
slot = htab_find_slot_with_hash (ptr_hash, ptr, htab_hash_pointer (ptr), INSERT);
gcc_assert (!*slot);
*slot = p;
loc->times++;
loc->allocated+=allocated;
loc->overhead+=overhead;
}
static int
ggc_prune_ptr (void **slot, void *b ATTRIBUTE_UNUSED)
{
struct ptr_hash_entry *p = *slot;
if (!ggc_marked_p (p->ptr))
{
p->loc->collected += p->size;
htab_clear_slot (ptr_hash, slot);
free (p);
}
return 1;
}
void
ggc_prune_overhead_list (void)
{
htab_traverse (ptr_hash, ggc_prune_ptr, NULL);
}
void ggc_free_overhead (void *ptr)
{
PTR *slot = htab_find_slot_with_hash (ptr_hash, ptr, htab_hash_pointer (ptr),
NO_INSERT);
struct ptr_hash_entry *p = *slot;
p->loc->freed += p->size;
htab_clear_slot (ptr_hash, slot);
free (p);
}
static int
cmp_statistic (const void *loc1, const void *loc2)
{
struct loc_descriptor *l1 = *(struct loc_descriptor **) loc1;
struct loc_descriptor *l2 = *(struct loc_descriptor **) loc2;
return ((l1->allocated + l1->overhead - l1->freed) -
(l2->allocated + l2->overhead - l2->freed));
}
struct loc_descriptor **loc_array;
static int
add_statistics (void **slot, void *b)
{
int *n = (int *)b;
loc_array[*n] = (struct loc_descriptor *) *slot;
(*n)++;
return 1;
}
#endif
void dump_ggc_loc_statistics (void)
{
#ifdef GATHER_STATISTICS
int nentries = 0;
char s[4096];
size_t collected = 0, freed = 0, allocated = 0, overhead = 0, times = 0;
int i;
ggc_force_collect = true;
ggc_collect ();
loc_array = xcalloc (sizeof (*loc_array), loc_hash->n_elements);
fprintf (stderr, "-------------------------------------------------------\n");
fprintf (stderr, "\n%-48s %10s %10s %10s %10s %10s\n",
"source location", "Garbage", "Freed", "Leak", "Overhead", "Times");
fprintf (stderr, "-------------------------------------------------------\n");
htab_traverse (loc_hash, add_statistics, &nentries);
qsort (loc_array, nentries, sizeof (*loc_array), cmp_statistic);
for (i = 0; i < nentries; i++)
{
struct loc_descriptor *d = loc_array[i];
allocated += d->allocated;
times += d->times;
freed += d->freed;
collected += d->collected;
overhead += d->overhead;
}
for (i = 0; i < nentries; i++)
{
struct loc_descriptor *d = loc_array[i];
if (d->allocated)
{
const char *s1 = d->file;
const char *s2;
while ((s2 = strstr (s1, "gcc/")))
s1 = s2 + 4;
sprintf (s, "%s:%i (%s)", s1, d->line, d->function);
s[48] = 0;
fprintf (stderr, "%-48s %10li:%4.1f%% %10li:%4.1f%% %10li:%4.1f%% %10li:%4.1f%% %10li\n", s,
(long)d->collected,
(d->collected) * 100.0 / collected,
(long)d->freed,
(d->freed) * 100.0 / freed,
(long)(d->allocated + d->overhead - d->freed - d->collected),
(d->allocated + d->overhead - d->freed - d->collected) * 100.0
/ (allocated + overhead - freed - collected),
(long)d->overhead,
d->overhead * 100.0 / overhead,
(long)d->times);
}
}
fprintf (stderr, "%-48s %10ld %10ld %10ld %10ld %10ld\n",
"Total", (long)collected, (long)freed,
(long)(allocated + overhead - freed - collected), (long)overhead,
(long)times);
fprintf (stderr, "%-48s %10s %10s %10s %10s %10s\n",
"source location", "Garbage", "Freed", "Leak", "Overhead", "Times");
fprintf (stderr, "-------------------------------------------------------\n");
#endif
}