#include "ggc.h"
#include "toplev.h"
#include "params.h"
+#include "hosthooks.h"
#ifdef HAVE_SYS_RESOURCE_H
# include <sys/resource.h>
#ifdef HAVE_MMAP_FILE
# include <sys/mman.h>
+# ifdef HAVE_MINCORE
+/* This is on Solaris. */
+# include <sys/types.h>
+# endif
+#endif
+
+#ifndef MAP_FAILED
+# define MAP_FAILED ((void *)-1)
#endif
#ifdef ENABLE_VALGRIND_CHECKING
struct traversal_state;
-static int ggc_htab_delete PARAMS ((void **, void *));
-static hashval_t saving_htab_hash PARAMS ((const PTR));
-static int saving_htab_eq PARAMS ((const PTR, const PTR));
-static int call_count PARAMS ((void **, void *));
-static int call_alloc PARAMS ((void **, void *));
-static int compare_ptr_data PARAMS ((const void *, const void *));
-static void relocate_ptrs PARAMS ((void *, void *));
-static void write_pch_globals PARAMS ((const struct ggc_root_tab * const *tab,
- struct traversal_state *state));
-static double ggc_rlimit_bound PARAMS ((double));
+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);
/* Maintain global roots that are preserved during GC. */
/* Process a slot of an htab by deleting it if it has not been marked. */
static int
-ggc_htab_delete (slot, info)
- void **slot;
- void *info;
+ggc_htab_delete (void **slot, void *info)
{
const struct ggc_cache_tab *r = (const struct ggc_cache_tab *) info;
/* Iterate through all registered roots and mark each element. */
void
-ggc_mark_roots ()
+ggc_mark_roots (void)
{
const struct ggc_root_tab *const *rt;
const struct ggc_root_tab *rti;
if (*cti->base)
{
ggc_set_mark (*cti->base);
- htab_traverse_noresize (*cti->base, ggc_htab_delete, (PTR) cti);
+ htab_traverse_noresize (*cti->base, ggc_htab_delete, (void *) cti);
ggc_set_mark ((*cti->base)->entries);
}
}
/* Allocate a block of memory, then clear it. */
void *
-ggc_alloc_cleared (size)
- size_t size;
+ggc_alloc_cleared (size_t size)
{
void *buf = ggc_alloc (size);
memset (buf, 0, size);
/* Resize a block of memory, possibly re-allocating it. */
void *
-ggc_realloc (x, size)
- void *x;
- size_t size;
+ggc_realloc (void *x, size_t size)
{
void *r;
size_t old_size;
don't know that previously allocated size. Without that
knowledge we have to lose some initialization-tracking for the
old parts of the object. An alternative is to mark the whole
- old_size as reachable, but that would lose tracking of writes
+ old_size as reachable, but that would lose tracking of writes
after the end of the object (by small offsets). Discard the
handle to avoid handle leak. */
VALGRIND_DISCARD (VALGRIND_MAKE_NOACCESS ((char *) x + size,
/* Like ggc_alloc_cleared, but performs a multiplication. */
void *
-ggc_calloc (s1, s2)
- size_t s1, s2;
+ggc_calloc (size_t s1, size_t s2)
{
return ggc_alloc_cleared (s1 * s2);
}
/* These are for splay_tree_new_ggc. */
-PTR
-ggc_splay_alloc (sz, nl)
- int sz;
- PTR nl;
+void *
+ggc_splay_alloc (int sz, void *nl)
{
if (nl != NULL)
abort ();
}
void
-ggc_splay_dont_free (x, nl)
- PTR x ATTRIBUTE_UNUSED;
- PTR nl;
+ggc_splay_dont_free (void * x ATTRIBUTE_UNUSED, void *nl)
{
if (nl != NULL)
abort ();
#define LABEL(x) ((x) < 1024*10 ? ' ' : ((x) < 1024*1024*10 ? 'k' : 'M'))
void
-ggc_print_common_statistics (stream, stats)
- FILE *stream ATTRIBUTE_UNUSED;
- ggc_statistics *stats;
+ggc_print_common_statistics (FILE *stream ATTRIBUTE_UNUSED,
+ ggc_statistics *stats)
{
/* Set the pointer so that during collection we will actually gather
the statistics. */
static htab_t saving_htab;
-struct ptr_data
+struct ptr_data
{
void *obj;
void *note_ptr_cookie;
/* Register an object in the hash table. */
int
-gt_pch_note_object (obj, note_ptr_cookie, note_ptr_fn)
- void *obj;
- void *note_ptr_cookie;
- gt_note_pointers note_ptr_fn;
+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;
abort ();
return 0;
}
-
+
*slot = xcalloc (sizeof (struct ptr_data), 1);
(*slot)->obj = obj;
(*slot)->note_ptr_fn = note_ptr_fn;
/* Register an object in the hash table. */
void
-gt_pch_note_reorder (obj, note_ptr_cookie, reorder_fn)
- void *obj;
- void *note_ptr_cookie;
- gt_handle_reorder reorder_fn;
+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;
if (data == NULL
|| data->note_ptr_cookie != note_ptr_cookie)
abort ();
-
+
data->reorder_fn = reorder_fn;
}
/* Hash and equality functions for saving_htab, callbacks for htab_create. */
static hashval_t
-saving_htab_hash (p)
- const PTR p;
+saving_htab_hash (const void *p)
{
return POINTER_HASH (((struct ptr_data *)p)->obj);
}
static int
-saving_htab_eq (p1, p2)
- const PTR p1;
- const PTR p2;
+saving_htab_eq (const void *p1, const void *p2)
{
return ((struct ptr_data *)p1)->obj == p2;
}
/* Handy state for the traversal functions. */
-struct traversal_state
+struct traversal_state
{
FILE *f;
struct ggc_pch_data *d;
/* Callbacks for htab_traverse. */
static int
-call_count (slot, state_p)
- void **slot;
- void *state_p;
+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);
state->count++;
return 1;
}
static int
-call_alloc (slot, state_p)
- void **slot;
- void *state_p;
+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);
state->ptrs[state->ptrs_i++] = d;
return 1;
/* Callback for qsort. */
static int
-compare_ptr_data (p1_p, p2_p)
- const void *p1_p;
- const void *p2_p;
+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;
/* Callbacks for note_ptr_fn. */
static void
-relocate_ptrs (ptr_p, state_p)
- void *ptr_p;
- void *state_p;
+relocate_ptrs (void *ptr_p, void *state_p)
{
void **ptr = (void **)ptr_p;
- struct traversal_state *state ATTRIBUTE_UNUSED
+ 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));
if (result == NULL)
abort ();
/* Write out, after relocation, the pointers in TAB. */
static void
-write_pch_globals (tab, state)
- const struct ggc_root_tab * const *tab;
- struct traversal_state *state;
+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;
struct ptr_data *new_ptr;
if (ptr == NULL || ptr == (void *)1)
{
- if (fwrite (&ptr, sizeof (void *), 1, state->f)
+ 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,
+ new_ptr = htab_find_with_hash (saving_htab, ptr,
POINTER_HASH (ptr));
- if (fwrite (&new_ptr->new_addr, sizeof (void *), 1, state->f)
+ if (fwrite (&new_ptr->new_addr, sizeof (void *), 1, state->f)
!= 1)
fatal_error ("can't write PCH file: %m");
}
/* Hold the information we need to mmap the file back in. */
-struct mmap_info
+struct mmap_info
{
size_t offset;
size_t size;
/* Write out the state of the compiler to F. */
void
-gt_pch_save (f)
- FILE *f;
+gt_pch_save (FILE *f)
{
const struct ggc_root_tab *const *rt;
const struct ggc_root_tab *rti;
mmi.size = ggc_pch_total_size (state.d);
- /* Try to arrange things so that no relocation is necessary,
- but don't try very hard. On most platforms, this will always work,
- and on the rest it's a lot of work to do better. */
+ /* Try to arrange things so that no relocation is necessary, but
+ don't try very hard. On most platforms, this will always work,
+ and on the rest it's a lot of work to do better.
+ (The extra work goes in HOST_HOOKS_GT_PCH_GET_ADDRESS and
+ HOST_HOOKS_GT_PCH_USE_ADDRESS.) */
+ mmi.preferred_base = host_hooks.gt_pch_get_address (mmi.size);
+
#if HAVE_MMAP_FILE
- mmi.preferred_base = mmap (NULL, mmi.size,
- PROT_READ | PROT_WRITE, MAP_PRIVATE,
- fileno (state.f), 0);
- if (mmi.preferred_base == (void *)-1)
- mmi.preferred_base = NULL;
- else
- munmap (mmi.preferred_base, mmi.size);
-#else /* HAVE_MMAP_FILE */
- mmi.preferred_base = NULL;
+ if (mmi.preferred_base == NULL)
+ {
+ mmi.preferred_base = mmap (NULL, mmi.size,
+ PROT_READ | PROT_WRITE, MAP_PRIVATE,
+ fileno (state.f), 0);
+ if (mmi.preferred_base == (void *) MAP_FAILED)
+ mmi.preferred_base = NULL;
+ else
+ munmap (mmi.preferred_base, mmi.size);
+ }
#endif /* HAVE_MMAP_FILE */
ggc_pch_this_base (state.d, mmi.preferred_base);
write_pch_globals (gt_pch_cache_rtab, &state);
ggc_pch_prepare_write (state.d, state.f);
-
- /* Pad the PCH file so that the mmaped area starts on a page boundary. */
+
+ /* Pad the PCH file so that the mmapped area starts on a page boundary. */
{
long o;
o = ftell (state.f) + sizeof (mmi);
}
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]->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_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,
/* Read the state of the compiler back in from F. */
void
-gt_pch_restore (f)
- FILE *f;
+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;
void *addr;
+ bool needs_read;
/* Delete any deletable objects. This makes ggc_pch_read much
faster, as it can be sure that no GCable objects remain other
if (fread (&mmi, sizeof (mmi), 1, f) != 1)
fatal_error ("can't read PCH file: %m");
-
+
+ if (host_hooks.gt_pch_use_address (mmi.preferred_base, mmi.size))
+ {
#if HAVE_MMAP_FILE
- addr = mmap (mmi.preferred_base, mmi.size,
- PROT_READ | PROT_WRITE, MAP_PRIVATE,
- fileno (f), mmi.offset);
+ void *mmap_result;
+
+ mmap_result = mmap (mmi.preferred_base, mmi.size,
+ PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_FIXED,
+ fileno (f), mmi.offset);
+
+ /* The file might not be mmap-able. */
+ needs_read = mmap_result == (void *) MAP_FAILED;
+
+ /* Sanity check for broken MAP_FIXED. */
+ if (! needs_read && mmap_result != mmi.preferred_base)
+ abort ();
#else
- addr = (void *)-1;
+ needs_read = true;
#endif
- if (addr == (void *)-1)
+ addr = mmi.preferred_base;
+ }
+ else
+ {
+#if HAVE_MMAP_FILE
+ addr = mmap (mmi.preferred_base, mmi.size,
+ PROT_READ | PROT_WRITE, MAP_PRIVATE,
+ fileno (f), mmi.offset);
+
+#if HAVE_MINCORE
+ if (addr != mmi.preferred_base)
+ {
+ size_t page_size = getpagesize();
+ char one_byte;
+
+ if (addr != (void *) MAP_FAILED)
+ munmap (addr, mmi.size);
+
+ /* We really want to be mapped at mmi.preferred_base
+ so we're going to resort to MAP_FIXED. But before,
+ make sure that we can do so without destroying a
+ previously mapped area, by looping over all pages
+ that would be affected by the fixed mapping. */
+ errno = 0;
+
+ for (i = 0; i < mmi.size; i+= page_size)
+ if (mincore ((char *)mmi.preferred_base + i, page_size,
+ (void *)&one_byte) == -1
+ && errno == ENOMEM)
+ continue; /* The page is not mapped. */
+ else
+ break;
+
+ if (i >= mmi.size)
+ addr = mmap (mmi.preferred_base, mmi.size,
+ PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_FIXED,
+ fileno (f), mmi.offset);
+ }
+#endif /* HAVE_MINCORE */
+
+ needs_read = addr == (void *) MAP_FAILED;
+
+#else /* HAVE_MMAP_FILE */
+ needs_read = true;
+#endif /* HAVE_MMAP_FILE */
+ if (needs_read)
+ addr = xmalloc (mmi.size);
+ }
+
+ if (needs_read)
{
- addr = xmalloc (mmi.size);
if (fseek (f, mmi.offset, SEEK_SET) != 0
|| fread (&mmi, mmi.size, 1, f) != 1)
fatal_error ("can't read PCH file: %m");
if (*ptr != NULL)
*ptr += (size_t)addr - (size_t)mmi.preferred_base;
}
-
+
for (rt = gt_pch_cache_rtab; *rt; rt++)
for (rti = *rt; rti->base != NULL; rti++)
for (i = 0; i < rti->nelt; i++)
/* Modify the bound based on rlimits. Keep the smallest number found. */
static double
-ggc_rlimit_bound (limit)
- double limit;
+ggc_rlimit_bound (double limit)
{
#if defined(HAVE_GETRLIMIT)
struct rlimit rlim;
/* Heuristic to set a default for GGC_MIN_EXPAND. */
int
-ggc_min_expand_heuristic()
+ggc_min_expand_heuristic (void)
{
double min_expand = physmem_total();
/* Adjust for rlimits. */
min_expand = ggc_rlimit_bound (min_expand);
-
+
/* The heuristic is a percentage equal to 30% + 70%*(RAM/1GB), yielding
a lower bound of 30% and an upper bound of 100% (when RAM >= 1GB). */
min_expand /= 1024*1024*1024;
/* Heuristic to set a default for GGC_MIN_HEAPSIZE. */
int
-ggc_min_heapsize_heuristic()
+ggc_min_heapsize_heuristic (void)
{
double min_heap_kbytes = physmem_total();
/* Adjust for rlimits. */
min_heap_kbytes = ggc_rlimit_bound (min_heap_kbytes);
- min_heap_kbytes /= 1024; /* convert to Kbytes. */
-
+ min_heap_kbytes /= 1024; /* Convert to Kbytes. */
+
/* The heuristic is RAM/8, with a lower bound of 4M and an upper
bound of 128M (when RAM >= 1GB). */
min_heap_kbytes /= 8;
}
void
-init_ggc_heuristics ()
+init_ggc_heuristics (void)
{
-#ifndef ENABLE_GC_ALWAYS_COLLECT
+#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
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