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Revert accidental commit. 

From-SVN: r76675
This commit is contained in:
Richard Henderson 2004-01-26 14:59:40 -08:00
parent 6d4b0a5d57
commit 242d879216
3 changed files with 30 additions and 158 deletions
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8
gcc/ggc-common.c
View File

@ -147,11 +147,6 @@ ggc_realloc (void *x, size_t size)
return ggc_alloc (size);
old_size = ggc_get_size (x);
#ifndef ENABLE_GC_ALWAYS_COLLECT
/* In completely-anal-checking mode, never re-use memory. This maximizes
the chance of catching the user retaining a pointer to the old block.
Otherwise, we get to consume the power-of-two overhead we had before. */
if (size <= old_size)
{
/* Mark the unwanted memory as unaccessible. We also need to make
@ -169,7 +164,6 @@ ggc_realloc (void *x, size_t size)
VALGRIND_DISCARD (VALGRIND_MAKE_READABLE (x, size));
return x;
}
#endif
r = ggc_alloc (size);
@ -182,7 +176,7 @@ ggc_realloc (void *x, size_t size)
memcpy (r, x, old_size);
/* The old object is not supposed to be used anymore. */
ggc_free (x);
VALGRIND_DISCARD (VALGRIND_MAKE_NOACCESS (x, old_size));
return r;
}

178
gcc/ggc-page.c
View File

@ -401,17 +401,6 @@ static struct globals
zero otherwise. We allocate them all together, to enable a
better runtime data access pattern. */
unsigned long **save_in_use;
#ifdef ENABLE_GC_ALWAYS_COLLECT
/* List of free objects to be verified as actually free on the
next collection. */
struct free_object
{
void *object;
struct free_object *next;
} *free_object_list;
#endif
#ifdef GATHER_STATISTICS
struct
{
@ -905,7 +894,7 @@ adjust_depth (void)
/* For a page that is no longer needed, put it on the free page list. */
static void
static inline void
free_page (page_entry *entry)
{
if (GGC_DEBUG_LEVEL >= 2)
@ -1060,19 +1049,16 @@ ggc_alloc_zone (size_t size, struct alloc_zone *zone ATTRIBUTE_UNUSED)
void *
ggc_alloc (size_t size)
{
size_t order, word, bit, object_offset, object_size;
unsigned order, word, bit, object_offset;
struct page_entry *entry;
void *result;
if (size <= 256)
{
order = size_lookup[size];
object_size = OBJECT_SIZE (order);
}
order = size_lookup[size];
else
{
order = 9;
while (size > (object_size = OBJECT_SIZE (order)))
while (size > OBJECT_SIZE (order))
order++;
}
@ -1135,7 +1121,7 @@ ggc_alloc (size_t size)
/* Next time, try the next bit. */
entry->next_bit_hint = hint + 1;
object_offset = hint * object_size;
object_offset = hint * OBJECT_SIZE (order);
}
/* Set the in-use bit. */
@ -1163,16 +1149,16 @@ ggc_alloc (size_t size)
exact same semantics in presence of memory bugs, regardless of
ENABLE_VALGRIND_CHECKING. We override this request below. Drop the
handle to avoid handle leak. */
VALGRIND_DISCARD (VALGRIND_MAKE_WRITABLE (result, object_size));
VALGRIND_DISCARD (VALGRIND_MAKE_WRITABLE (result, OBJECT_SIZE (order)));
/* `Poison' the entire allocated object, including any padding at
the end. */
memset (result, 0xaf, object_size);
memset (result, 0xaf, OBJECT_SIZE (order));
/* Make the bytes after the end of the object unaccessible. Discard the
handle to avoid handle leak. */
VALGRIND_DISCARD (VALGRIND_MAKE_NOACCESS ((char *) result + size,
object_size - size));
OBJECT_SIZE (order) - size));
#endif
/* Tell Valgrind that the memory is there, but its content isn't
@ -1182,39 +1168,37 @@ ggc_alloc (size_t size)
/* Keep track of how many bytes are being allocated. This
information is used in deciding when to collect. */
G.allocated += object_size;
G.allocated += OBJECT_SIZE (order);
#ifdef GATHER_STATISTICS
{
size_t overhead = object_size - size;
G.stats.total_overhead += OBJECT_SIZE (order) - size;
G.stats.total_allocated += OBJECT_SIZE(order);
G.stats.total_overhead_per_order[order] += OBJECT_SIZE (order) - size;
G.stats.total_allocated_per_order[order] += OBJECT_SIZE (order);
G.stats.total_overhead += overhead;
G.stats.total_allocated += object_size;
G.stats.total_overhead_per_order[order] += overhead;
G.stats.total_allocated_per_order[order] += object_size;
if (size <= 32){
G.stats.total_overhead_under32 += OBJECT_SIZE (order) - size;
G.stats.total_allocated_under32 += OBJECT_SIZE(order);
}
if (size <= 64){
G.stats.total_overhead_under64 += OBJECT_SIZE (order) - size;
G.stats.total_allocated_under64 += OBJECT_SIZE(order);
}
if (size <= 128){
G.stats.total_overhead_under128 += OBJECT_SIZE (order) - size;
G.stats.total_allocated_under128 += OBJECT_SIZE(order);
}
if (size <= 32)
{
G.stats.total_overhead_under32 += overhead;
G.stats.total_allocated_under32 += object_size;
}
if (size <= 64)
{
G.stats.total_overhead_under64 += overhead;
G.stats.total_allocated_under64 += object_size;
}
if (size <= 128)
{
G.stats.total_overhead_under128 += overhead;
G.stats.total_allocated_under128 += object_size;
}
}
#endif
if (GGC_DEBUG_LEVEL >= 3)
fprintf (G.debug_file,
"Allocating object, requested size=%lu, actual=%lu at %p on %p\n",
(unsigned long) size, (unsigned long) object_size, result,
(unsigned long) size, (unsigned long) OBJECT_SIZE (order), result,
(void *) entry);
return result;
@ -1295,78 +1279,6 @@ ggc_get_size (const void *p)
page_entry *pe = lookup_page_table_entry (p);
return OBJECT_SIZE (pe->order);
}
/* Release the memory for object P. */
void
ggc_free (void *p)
{
page_entry *pe = lookup_page_table_entry (p);
size_t order = pe->order;
size_t size = OBJECT_SIZE (order);
if (GGC_DEBUG_LEVEL >= 3)
fprintf (G.debug_file,
"Freeing object, actual size=%lu, at %p on %p\n",
(unsigned long) size, p, (void *) pe);
#ifdef ENABLE_GC_CHECKING
/* Poison the data, to indicate the data is garbage. */
VALGRIND_DISCARD (VALGRIND_MAKE_WRITABLE (p, size));
memset (p, 0xa5, size);
#endif
/* Let valgrind know the object is free. */
VALGRIND_DISCARD (VALGRIND_MAKE_NOACCESS (p, size));
#ifdef ENABLE_GC_ALWAYS_COLLECT
/* In the completely-anal-checking mode, we do *not* immediately free
the data, but instead verify that the data is *actually* not
reachable the next time we collect. */
{
struct free_object *fo = xmalloc (sizeof (struct free_object));
fo->object = p;
fo->next = G.free_object_list;
G.free_object_list = fo;
}
#else
{
unsigned int bit_offset, word, bit;
G.allocated -= size;
/* Mark the object not-in-use. */
bit_offset = OFFSET_TO_BIT (((const char *) p) - pe->page, order);
word = bit_offset / HOST_BITS_PER_LONG;
bit = bit_offset % HOST_BITS_PER_LONG;
pe->in_use_p[word] &= ~(1UL << bit);
if (pe->num_free_objects++ == 0)
{
/* If the page is completely full, then it's supposed to
be after all pages that aren't. Since we've freed one
object from a page that was full, we need to move the
page to the head of the list. */
page_entry *p, *q;
for (q = NULL, p = G.pages[order]; ; q = p, p = p->next)
if (p == pe)
break;
if (q && q->num_free_objects == 0)
{
p = pe->next;
q->next = p;
if (!p)
G.page_tails[order] = q;
pe->next = G.pages[order];
G.pages[order] = pe;
}
/* Reset the hint bit to point to the only free object. */
pe->next_bit_hint = bit_offset;
}
}
#endif
}
/* Subroutine of init_ggc which computes the pair of numbers used to
perform division by OBJECT_SIZE (order) and fills in inverse_table[].
@ -1876,8 +1788,6 @@ ggc_collect (void)
timevar_push (TV_GC);
if (!quiet_flag)
fprintf (stderr, " {GC %luk -> ", (unsigned long) G.allocated / 1024);
if (GGC_DEBUG_LEVEL >= 2)
fprintf (G.debug_file, "BEGIN COLLECTING\n");
/* Zero the total allocated bytes. This will be recalculated in the
sweep phase. */
@ -1899,42 +1809,12 @@ ggc_collect (void)
sweep_pages ();
#ifdef ENABLE_GC_ALWAYS_COLLECT
/* Validate that the reportedly free objects actually are. */
{
struct free_object *f, *n;
for (f = G.free_object_list; f ; f = n)
{
page_entry *pe = lookup_page_table_entry (f->object);
/* If the page entry is null, that means the entire page is free.
Otherwise, we have to examine the in-use bit for the object. */
if (pe != NULL)
{
size_t bit, word;
bit = OFFSET_TO_BIT ((char *)f->object - pe->page, pe->order);
word = bit / HOST_BITS_PER_LONG;
bit = bit % HOST_BITS_PER_LONG;
if (pe->in_use_p[word] & (1UL << bit))
abort ();
}
n = f->next;
free (f);
}
G.free_object_list = NULL;
}
#endif
G.allocated_last_gc = G.allocated;
timevar_pop (TV_GC);
if (!quiet_flag)
fprintf (stderr, "%luk}", (unsigned long) G.allocated / 1024);
if (GGC_DEBUG_LEVEL >= 2)
fprintf (G.debug_file, "END COLLECTING\n");
}
/* Print allocation statistics. */

2
gcc/ggc.h
View File

@ -223,8 +223,6 @@ extern void *ggc_alloc_cleared_zone (size_t, struct alloc_zone *);
extern void *ggc_realloc (void *, size_t);
/* Like ggc_alloc_cleared, but performs a multiplication. */
extern void *ggc_calloc (size_t, size_t);
/* Free a block. To be used when known for certain it's not reachable. */
extern void ggc_free (void *);
#define ggc_alloc_rtx(CODE) \
((rtx) ggc_alloc_typed (gt_ggc_e_7rtx_def, RTX_SIZE (CODE)))