static void duk__sweep_stringtable(duk_heap *heap, duk_size_t *out_count_keep) {
duk_hstring *h;
duk_uint_fast32_t i;
#ifdef DUK_USE_DEBUG
duk_size_t count_free = 0;
#endif
duk_size_t count_keep = 0;
DUK_DD(DUK_DDPRINT("duk__sweep_stringtable: %p", (void *) heap));
for (i = 0; i < heap->st_size; i++) {
h = heap->st[i];
if (h == NULL || h == DUK_STRTAB_DELETED_MARKER(heap)) {
continue;
} else if (DUK_HEAPHDR_HAS_REACHABLE((duk_heaphdr *) h)) {
DUK_HEAPHDR_CLEAR_REACHABLE((duk_heaphdr *) h);
count_keep++;
continue;
}
#ifdef DUK_USE_DEBUG
count_free++;
#endif
#if defined(DUK_USE_REFERENCE_COUNTING)
/* Non-zero refcounts should not happen for unreachable strings,
* because we refcount finalize all unreachable objects which
* should have decreased unreachable string refcounts to zero
* (even for cycles).
*/
DUK_ASSERT(DUK_HEAPHDR_GET_REFCOUNT((duk_heaphdr *) h) == 0);
#endif
DUK_DDD(DUK_DDDPRINT("sweep string, not reachable: %p", (void *) h));
/* deal with weak references first */
duk_heap_strcache_string_remove(heap, (duk_hstring *) h);
/* remove the string (mark DELETED), could also call
* duk_heap_string_remove() but that would be slow and
* pointless because we already know the slot.
*/
heap->st[i] = DUK_STRTAB_DELETED_MARKER(heap);
/* then free */
#if 1
DUK_FREE(heap, (duk_heaphdr *) h); /* no inner refs/allocs, just free directly */
#else
duk_heap_free_heaphdr_raw(heap, (duk_heaphdr *) h); /* this would be OK but unnecessary */
#endif
}
#ifdef DUK_USE_DEBUG
DUK_D(DUK_DPRINT("mark-and-sweep sweep stringtable: %d freed, %d kept",
(int) count_free, (int) count_keep));
#endif
*out_count_keep = count_keep;
}
static void duk__dump_stringtable(duk_heap *heap) {
duk_uint_fast32_t i;
char buf[64+1];
DUK_D(DUK_DPRINT("stringtable %p, used %ld, size %ld, load %ld%%",
(void *) heap->st,
(long) heap->st_used,
(long) heap->st_size,
(long) (((double) heap->st_used) / ((double) heap->st_size) * 100.0)));
for (i = 0; i < (duk_uint_fast32_t) heap->st_size; i++) {
duk_hstring *e = heap->st[i];
if (!e) {
DUK_D(DUK_DPRINT(" [%ld]: NULL", (long) i));
} else if (e == DUK_STRTAB_DELETED_MARKER(heap)) {
DUK_D(DUK_DPRINT(" [%ld]: DELETED", (long) i));
} else {
duk__sanitize_snippet(buf, sizeof(buf), e);
#ifdef DUK_USE_REFERENCE_COUNTING
DUK_D(DUK_DPRINT(" [%ld]: %p (flags: 0x%08lx, ref: %ld) '%s', strhash=0x%08lx, blen=%ld, clen=%ld, "
"arridx=%ld, internal=%ld, reserved_word=%ld, strict_reserved_word=%ld, eval_or_arguments=%ld",
(long) i,
(void *) e,
(unsigned long) DUK_HEAPHDR_GET_FLAGS((duk_heaphdr *) e),
(long) DUK_HEAPHDR_GET_REFCOUNT((duk_heaphdr *) e),
(const char *) buf,
(unsigned long) e->hash,
(long) e->blen,
(long) e->clen,
(long) (DUK_HSTRING_HAS_ARRIDX(e) ? 1 : 0),
(long) (DUK_HSTRING_HAS_INTERNAL(e) ? 1 : 0),
(long) (DUK_HSTRING_HAS_RESERVED_WORD(e) ? 1 : 0),
(long) (DUK_HSTRING_HAS_STRICT_RESERVED_WORD(e) ? 1 : 0),
(long) (DUK_HSTRING_HAS_EVAL_OR_ARGUMENTS(e) ? 1 : 0)));
#else
DUK_D(DUK_DPRINT(" [%ld]: %p (flags: 0x%08lx) '%s', strhash=0x%08lx, blen=%ld, clen=%ld, "
"arridx=%ld, internal=%ld, reserved_word=%ld, strict_reserved_word=%ld, eval_or_arguments=%ld",
(long) i,
(void *) e,
(unsigned long) DUK_HEAPHDR_GET_FLAGS((duk_heaphdr *) e),
(const char *) buf,
(long) e->hash,
(long) e->blen,
(long) e->clen,
(long) (DUK_HSTRING_HAS_ARRIDX(e) ? 1 : 0),
(long) (DUK_HSTRING_HAS_INTERNAL(e) ? 1 : 0),
(long) (DUK_HSTRING_HAS_RESERVED_WORD(e) ? 1 : 0),
(long) (DUK_HSTRING_HAS_STRICT_RESERVED_WORD(e) ? 1 : 0),
(long) (DUK_HSTRING_HAS_EVAL_OR_ARGUMENTS(e) ? 1 : 0)));
#endif
}
}
}
static void dump_stringtable(duk_heap *heap) {
duk_uint32_t i;
char buf[64+1];
DUK_DPRINT("stringtable %p, used %d, size %d, load %d%%",
(void *) heap->st,
(int) heap->st_used,
(int) heap->st_size,
(int) (((double) heap->st_used) / ((double) heap->st_size) * 100.0));
for (i = 0; i < heap->st_size; i++) {
duk_hstring *e = heap->st[i];
if (!e) {
DUK_DPRINT(" [%d]: NULL", i);
} else if (e == DUK_STRTAB_DELETED_MARKER(heap)) {
DUK_DPRINT(" [%d]: DELETED", i);
} else {
sanitize_snippet(buf, sizeof(buf), e);
/* FIXME: all string flags not printed now */
#ifdef DUK_USE_REFERENCE_COUNTING
DUK_DPRINT(" [%d]: %p (flags: 0x%08x, ref: %d) '%s', strhash=0x%08x, blen=%d, clen=%d, arridx=%d, internal=%d",
i,
(void *) e,
(int) DUK_HEAPHDR_GET_FLAGS((duk_heaphdr *) e),
(int) DUK_HEAPHDR_GET_REFCOUNT((duk_heaphdr *) e),
buf,
(int) e->hash,
(int) e->blen,
(int) e->clen,
DUK_HSTRING_HAS_ARRIDX(e) ? 1 : 0,
DUK_HSTRING_HAS_INTERNAL(e) ? 1 : 0);
#else
DUK_DPRINT(" [%d]: %p (flags: 0x%08x) '%s', strhash=0x%08x, blen=%d, clen=%d, arridx=%d, internal=%d",
i,
(void *) e,
(int) DUK_HEAPHDR_GET_FLAGS((duk_heaphdr *) e),
buf,
(int) e->hash,
(int) e->blen,
(int) e->clen,
DUK_HSTRING_HAS_ARRIDX(e) ? 1 : 0,
DUK_HSTRING_HAS_INTERNAL(e) ? 1 : 0);
#endif
}
}
}
DUK_INTERNAL void duk_heap_free_strtab(duk_heap *heap) {
duk_uint_fast32_t i;
duk_hstring *h;
#if defined(DUK_USE_HEAPPTR16)
if (heap->strtable16) {
#else
if (heap->strtable) {
#endif
for (i = 0; i < (duk_uint_fast32_t) heap->st_size; i++) {
#if defined(DUK_USE_HEAPPTR16)
h = (duk_hstring *) DUK_USE_HEAPPTR_DEC16(heap->heap_udata, heap->strtable16[i]);
#else
h = heap->strtable[i];
#endif
if (h == NULL || h == DUK_STRTAB_DELETED_MARKER(heap)) {
continue;
}
DUK_ASSERT(h != NULL);
/* strings may have inner refs (extdata) in some cases */
duk_free_hstring_inner(heap, h);
DUK_FREE(heap, h);
#if 0 /* not strictly necessary */
heap->strtable[i] = NULL;
#endif
}
#if defined(DUK_USE_HEAPPTR16)
DUK_FREE(heap, heap->strtable16);
#else
DUK_FREE(heap, heap->strtable);
#endif
#if 0 /* not strictly necessary */
heap->strtable = NULL;
#endif
}
}
static void duk__free_stringtable(duk_heap *heap) {
duk_uint_fast32_t i;
/* strings are only tracked by stringtable */
if (heap->st) {
for (i = 0; i < heap->st_size; i++) {
duk_hstring *e = heap->st[i];
if (e == DUK_STRTAB_DELETED_MARKER(heap)) {
continue;
}
/* strings have no inner allocations so free directly */
DUK_DDD(DUK_DDDPRINT("FINALFREE (string): %!iO", e));
DUK_FREE(heap, e);
#if 0 /* not strictly necessary */
heap->st[i] = NULL;
#endif
}
DUK_FREE(heap, heap->st);
#if 0 /* not strictly necessary */
heap->st = NULL;
#endif
}
}
DUK_INTERNAL
duk_heap *duk_heap_alloc(duk_alloc_function alloc_func,
duk_realloc_function realloc_func,
duk_free_function free_func,
void *alloc_udata,
duk_fatal_function fatal_func) {
duk_heap *res = NULL;
DUK_D(DUK_DPRINT("allocate heap"));
/*
* Debug dump type sizes
*/
#ifdef DUK_USE_DEBUG
duk__dump_type_sizes();
duk__dump_type_limits();
#endif
/*
* If selftests enabled, run them as early as possible
*/
#ifdef DUK_USE_SELF_TESTS
DUK_D(DUK_DPRINT("running self tests"));
duk_selftest_run_tests();
DUK_D(DUK_DPRINT("self tests passed"));
#endif
#ifdef DUK_USE_COMPUTED_NAN
do {
/* Workaround for some exotic platforms where NAN is missing
* and the expression (0.0 / 0.0) does NOT result in a NaN.
* Such platforms use the global 'duk_computed_nan' which must
* be initialized at runtime. Use 'volatile' to ensure that
* the compiler will actually do the computation and not try
* to do constant folding which might result in the original
* problem.
*/
volatile double dbl1 = 0.0;
volatile double dbl2 = 0.0;
duk_computed_nan = dbl1 / dbl2;
} while (0);
#endif
/*
* Computed values (e.g. INFINITY)
*/
#ifdef DUK_USE_COMPUTED_INFINITY
do {
/* Similar workaround for INFINITY. */
volatile double dbl1 = 1.0;
volatile double dbl2 = 0.0;
duk_computed_infinity = dbl1 / dbl2;
} while (0);
#endif
/*
* Allocate heap struct
*
* Use a raw call, all macros expect the heap to be initialized
*/
res = (duk_heap *) alloc_func(alloc_udata, sizeof(duk_heap));
if (!res) {
goto error;
}
/*
* Zero the struct, and start initializing roughly in order
*/
DUK_MEMZERO(res, sizeof(*res));
/* explicit NULL inits */
#ifdef DUK_USE_EXPLICIT_NULL_INIT
res->alloc_udata = NULL;
res->heap_allocated = NULL;
#ifdef DUK_USE_REFERENCE_COUNTING
res->refzero_list = NULL;
res->refzero_list_tail = NULL;
#endif
#ifdef DUK_USE_MARK_AND_SWEEP
res->finalize_list = NULL;
#endif
res->heap_thread = NULL;
res->curr_thread = NULL;
res->heap_object = NULL;
res->log_buffer = NULL;
#if defined(DUK_USE_STRTAB_CHAIN)
/* nothing to NULL */
#elif defined(DUK_USE_STRTAB_PROBE)
#if defined(DUK_USE_HEAPPTR16)
res->strtable16 = (duk_uint16_t *) NULL;
#else
res->strtable = (duk_hstring **) NULL;
#endif
#endif
{
duk_small_uint_t i;
for (i = 0; i < DUK_HEAP_NUM_STRINGS; i++) {
res->strs[i] = NULL;
}
}
#endif /* DUK_USE_EXPLICIT_NULL_INIT */
res->alloc_func = alloc_func;
res->realloc_func = realloc_func;
res->free_func = free_func;
res->alloc_udata = alloc_udata;
res->fatal_func = fatal_func;
#if defined(DUK_USE_HEAPPTR16)
res->heapptr_null16 = DUK_USE_HEAPPTR_ENC16((void *) NULL);
res->heapptr_deleted16 = DUK_USE_HEAPPTR_ENC16((void *) DUK_STRTAB_DELETED_MARKER(res));
#endif
/* res->mark_and_sweep_trigger_counter == 0 -> now causes immediate GC; which is OK */
res->call_recursion_depth = 0;
res->call_recursion_limit = DUK_HEAP_DEFAULT_CALL_RECURSION_LIMIT;
/* XXX: use the pointer as a seed for now: mix in time at least */
/* The casts through duk_intr_pt is to avoid the following GCC warning:
*
* warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
*
* This still generates a /Wp64 warning on VS2010 when compiling for x86.
*/
res->hash_seed = (duk_uint32_t) (duk_intptr_t) res;
res->rnd_state = (duk_uint32_t) (duk_intptr_t) res;
#ifdef DUK_USE_INTERRUPT_COUNTER
/* zero value causes an interrupt before executing first instruction */
DUK_ASSERT(res->interrupt_counter == 0);
DUK_ASSERT(res->interrupt_init == 0);
#endif
#ifdef DUK_USE_EXPLICIT_NULL_INIT
res->lj.jmpbuf_ptr = NULL;
#endif
DUK_ASSERT(res->lj.type == DUK_LJ_TYPE_UNKNOWN); /* zero */
DUK_TVAL_SET_UNDEFINED_UNUSED(&res->lj.value1);
DUK_TVAL_SET_UNDEFINED_UNUSED(&res->lj.value2);
#if (DUK_STRTAB_INITIAL_SIZE < DUK_UTIL_MIN_HASH_PRIME)
#error initial heap stringtable size is defined incorrectly
#endif
/*
* Init stringtable: fixed variant
*/
#if defined(DUK_USE_STRTAB_CHAIN)
DUK_MEMZERO(res->strtable, sizeof(duk_strtab_entry) * DUK_STRTAB_CHAIN_SIZE);
#ifdef DUK_USE_EXPLICIT_NULL_INIT
{
duk_small_uint_t i;
for (i = 0; i < DUK_STRTAB_CHAIN_SIZE; i++) {
#if defined(DUK_USE_HEAPPTR16)
res->strtable[i].u.str16 = res->heapptr_null16;
#else
res->strtable[i].u.str = NULL;
#endif
}
}
#endif /* DUK_USE_EXPLICIT_NULL_INIT */
#endif /* DUK_USE_STRTAB_CHAIN */
/*
* Init stringtable: probe variant
*/
#if defined(DUK_USE_STRTAB_PROBE)
#if defined(DUK_USE_HEAPPTR16)
res->strtable16 = (duk_uint16_t *) alloc_func(alloc_udata, sizeof(duk_uint16_t) * DUK_STRTAB_INITIAL_SIZE);
if (!res->strtable16) {
goto error;
}
#else /* DUK_USE_HEAPPTR16 */
res->strtable = (duk_hstring **) alloc_func(alloc_udata, sizeof(duk_hstring *) * DUK_STRTAB_INITIAL_SIZE);
if (!res->strtable) {
goto error;
}
#endif /* DUK_USE_HEAPPTR16 */
res->st_size = DUK_STRTAB_INITIAL_SIZE;
#ifdef DUK_USE_EXPLICIT_NULL_INIT
{
duk_small_uint_t i;
DUK_ASSERT(res->st_size == DUK_STRTAB_INITIAL_SIZE);
for (i = 0; i < DUK_STRTAB_INITIAL_SIZE; i++) {
#if defined(DUK_USE_HEAPPTR16)
res->strtable16[i] = res->heapptr_null16;
#else
res->strtable[i] = NULL;
#endif
}
}
#else /* DUK_USE_EXPLICIT_NULL_INIT */
#if defined(DUK_USE_HEAPPTR16)
DUK_MEMZERO(res->strtable16, sizeof(duk_uint16_t) * DUK_STRTAB_INITIAL_SIZE);
#else
DUK_MEMZERO(res->strtable, sizeof(duk_hstring *) * DUK_STRTAB_INITIAL_SIZE);
#endif
#endif /* DUK_USE_EXPLICIT_NULL_INIT */
#endif /* DUK_USE_STRTAB_PROBE */
/*
* Init stringcache
*/
#ifdef DUK_USE_EXPLICIT_NULL_INIT
{
duk_small_uint_t i;
for (i = 0; i < DUK_HEAP_STRCACHE_SIZE; i++) {
res->strcache[i].h = NULL;
}
}
#endif
/* XXX: error handling is incomplete. It would be cleanest if
* there was a setjmp catchpoint, so that all init code could
* freely throw errors. If that were the case, the return code
* passing here could be removed.
*/
/*
* Init built-in strings
*/
DUK_DD(DUK_DDPRINT("HEAP: INIT STRINGS"));
if (!duk__init_heap_strings(res)) {
goto error;
}
/*
* Init the heap thread
*/
DUK_DD(DUK_DDPRINT("HEAP: INIT HEAP THREAD"));
if (!duk__init_heap_thread(res)) {
goto error;
}
/*
* Init the heap object
*/
DUK_DD(DUK_DDPRINT("HEAP: INIT HEAP OBJECT"));
DUK_ASSERT(res->heap_thread != NULL);
res->heap_object = duk_hobject_alloc(res, DUK_HOBJECT_FLAG_EXTENSIBLE |
DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_OBJECT));
if (!res->heap_object) {
goto error;
}
DUK_HOBJECT_INCREF(res->heap_thread, res->heap_object);
/*
* Init log buffer
*/
DUK_DD(DUK_DDPRINT("HEAP: INIT LOG BUFFER"));
res->log_buffer = (duk_hbuffer_dynamic *) duk_hbuffer_alloc(res,
DUK_BI_LOGGER_SHORT_MSG_LIMIT,
1 /*dynamic*/);
if (!res->log_buffer) {
goto error;
}
DUK_HBUFFER_INCREF(res->heap_thread, res->log_buffer);
/*
* All done
*/
DUK_D(DUK_DPRINT("allocated heap: %p", (void *) res));
return res;
error:
DUK_D(DUK_DPRINT("heap allocation failed"));
if (res) {
/* assumes that allocated pointers and alloc funcs are valid
* if res exists
*/
DUK_ASSERT(res->alloc_func != NULL);
DUK_ASSERT(res->realloc_func != NULL);
DUK_ASSERT(res->free_func != NULL);
duk_heap_free(res);
}
return NULL;
}
DUK_LOCAL void duk__free_stringtable(duk_heap *heap) {
duk_uint_fast32_t i;
/* strings are only tracked by stringtable */
#if defined(DUK_USE_HEAPPTR16)
if (heap->strtable16) {
#else
if (heap->strtable) {
#endif
for (i = 0; i < (duk_uint_fast32_t) heap->st_size; i++) {
duk_hstring *e;
#if defined(DUK_USE_HEAPPTR16)
e = (duk_hstring *) DUK_USE_HEAPPTR_DEC16(heap->strtable16[i]);
#else
e = heap->strtable[i];
#endif
if (e == NULL || e == DUK_STRTAB_DELETED_MARKER(heap)) {
continue;
}
DUK_ASSERT(e != NULL);
/* strings may have inner refs (extdata) in some cases */
duk_free_hstring_inner(heap, (duk_hstring *) e);
DUK_DDD(DUK_DDDPRINT("FINALFREE (string): %!iO",
(duk_heaphdr *) e));
DUK_FREE(heap, e);
#if 0 /* not strictly necessary */
heap->strtable[i] = NULL;
#endif
}
#if defined(DUK_USE_HEAPPTR16)
DUK_FREE(heap, heap->strtable16);
#else
DUK_FREE(heap, heap->strtable);
#endif
#if 0 /* not strictly necessary */
heap->strtable = NULL;
#endif
}
}
DUK_LOCAL void duk__free_run_finalizers(duk_heap *heap) {
duk_hthread *thr;
duk_heaphdr *curr;
#ifdef DUK_USE_DEBUG
duk_size_t count_obj = 0;
#endif
DUK_ASSERT(heap != NULL);
DUK_ASSERT(heap->heap_thread != NULL);
#ifdef DUK_USE_REFERENCE_COUNTING
DUK_ASSERT(heap->refzero_list == NULL); /* refzero not running -> must be empty */
#endif
#ifdef DUK_USE_MARK_AND_SWEEP
DUK_ASSERT(heap->finalize_list == NULL); /* mark-and-sweep not running -> must be empty */
#endif
/* XXX: here again finalizer thread is the heap_thread which needs
* to be coordinated with finalizer thread fixes.
*/
thr = heap->heap_thread;
DUK_ASSERT(thr != NULL);
curr = heap->heap_allocated;
while (curr) {
if (DUK_HEAPHDR_GET_TYPE(curr) == DUK_HTYPE_OBJECT) {
/* Only objects in heap_allocated may have finalizers. Check that
* the object itself has a _Finalizer property so that we don't
* execute finalizers for e.g. Proxy objects.
*/
DUK_ASSERT(thr != NULL);
DUK_ASSERT(curr != NULL);
if (duk_hobject_hasprop_raw(thr, (duk_hobject *) curr, DUK_HTHREAD_STRING_INT_FINALIZER(thr))) {
duk_hobject_run_finalizer(thr, (duk_hobject *) curr);
}
#ifdef DUK_USE_DEBUG
count_obj++;
#endif
}
curr = DUK_HEAPHDR_GET_NEXT(curr);
}
/* Note: count includes all objects, not only those with an actual finalizer. */
#ifdef DUK_USE_DEBUG
DUK_D(DUK_DPRINT("checked %ld objects for finalizers before freeing heap", (long) count_obj));
#endif
}
DUK_LOCAL void duk__sweep_stringtable_probe(duk_heap *heap, duk_size_t *out_count_keep) {
duk_hstring *h;
duk_uint_fast32_t i;
#ifdef DUK_USE_DEBUG
duk_size_t count_free = 0;
#endif
duk_size_t count_keep = 0;
DUK_DD(DUK_DDPRINT("duk__sweep_stringtable: %p", (void *) heap));
for (i = 0; i < heap->st_size; i++) {
#if defined(DUK_USE_HEAPPTR16)
h = (duk_hstring *) DUK_USE_HEAPPTR_DEC16(heap->heap_udata, heap->strtable16[i]);
#else
h = heap->strtable[i];
#endif
if (h == NULL || h == DUK_STRTAB_DELETED_MARKER(heap)) {
continue;
} else if (DUK_HEAPHDR_HAS_REACHABLE((duk_heaphdr *) h)) {
DUK_HEAPHDR_CLEAR_REACHABLE((duk_heaphdr *) h);
count_keep++;
continue;
}
#ifdef DUK_USE_DEBUG
count_free++;
#endif
#if defined(DUK_USE_REFERENCE_COUNTING)
/* Non-zero refcounts should not happen for unreachable strings,
* because we refcount finalize all unreachable objects which
* should have decreased unreachable string refcounts to zero
* (even for cycles).
*/
DUK_ASSERT(DUK_HEAPHDR_GET_REFCOUNT((duk_heaphdr *) h) == 0);
#endif
DUK_DDD(DUK_DDDPRINT("sweep string, not reachable: %p", (void *) h));
/* deal with weak references first */
duk_heap_strcache_string_remove(heap, (duk_hstring *) h);
/* remove the string (mark DELETED), could also call
* duk_heap_string_remove() but that would be slow and
* pointless because we already know the slot.
*/
#if defined(DUK_USE_HEAPPTR16)
heap->strtable16[i] = heap->heapptr_deleted16;
#else
heap->strtable[i] = DUK_STRTAB_DELETED_MARKER(heap);
#endif
/* free inner references (these exist e.g. when external
* strings are enabled)
*/
duk_free_hstring_inner(heap, (duk_hstring *) h);
/* finally free the struct itself */
DUK_FREE(heap, h);
}
#ifdef DUK_USE_DEBUG
DUK_D(DUK_DPRINT("mark-and-sweep sweep stringtable: %ld freed, %ld kept",
(long) count_free, (long) count_keep));
#endif
*out_count_keep = count_keep;
}
DUK_INTERNAL
duk_heap *duk_heap_alloc(duk_alloc_function alloc_func,
duk_realloc_function realloc_func,
duk_free_function free_func,
void *heap_udata,
duk_fatal_function fatal_func) {
duk_heap *res = NULL;
DUK_D(DUK_DPRINT("allocate heap"));
/*
* Debug dump type sizes
*/
#if defined(DUK_USE_DEBUG)
duk__dump_misc_options();
duk__dump_type_sizes();
duk__dump_type_limits();
#endif
/*
* If selftests enabled, run them as early as possible.
*/
#if defined(DUK_USE_SELF_TESTS)
if (duk_selftest_run_tests(alloc_func, realloc_func, free_func, heap_udata) > 0) {
fatal_func(heap_udata, "self test(s) failed");
}
#endif
/*
* Important assert-like checks that should be enabled even
* when assertions are otherwise not enabled.
*/
#if defined(DUK_USE_EXEC_REGCONST_OPTIMIZE)
/* Can't check sizeof() using preprocessor so explicit check.
* This will be optimized away in practice; unfortunately a
* warning is generated on some compilers as a result.
*/
#if defined(DUK_USE_PACKED_TVAL)
if (sizeof(duk_tval) != 8) {
#else
if (sizeof(duk_tval) != 16) {
#endif
fatal_func(heap_udata, "sizeof(duk_tval) not 8 or 16, cannot use DUK_USE_EXEC_REGCONST_OPTIMIZE option");
}
#endif /* DUK_USE_EXEC_REGCONST_OPTIMIZE */
/*
* Computed values (e.g. INFINITY)
*/
#if defined(DUK_USE_COMPUTED_NAN)
do {
/* Workaround for some exotic platforms where NAN is missing
* and the expression (0.0 / 0.0) does NOT result in a NaN.
* Such platforms use the global 'duk_computed_nan' which must
* be initialized at runtime. Use 'volatile' to ensure that
* the compiler will actually do the computation and not try
* to do constant folding which might result in the original
* problem.
*/
volatile double dbl1 = 0.0;
volatile double dbl2 = 0.0;
duk_computed_nan = dbl1 / dbl2;
} while (0);
#endif
#if defined(DUK_USE_COMPUTED_INFINITY)
do {
/* Similar workaround for INFINITY. */
volatile double dbl1 = 1.0;
volatile double dbl2 = 0.0;
duk_computed_infinity = dbl1 / dbl2;
} while (0);
#endif
/*
* Allocate heap struct
*
* Use a raw call, all macros expect the heap to be initialized
*/
res = (duk_heap *) alloc_func(heap_udata, sizeof(duk_heap));
if (!res) {
goto error;
}
/*
* Zero the struct, and start initializing roughly in order
*/
DUK_MEMZERO(res, sizeof(*res));
/* explicit NULL inits */
#if defined(DUK_USE_EXPLICIT_NULL_INIT)
res->heap_udata = NULL;
res->heap_allocated = NULL;
#if defined(DUK_USE_REFERENCE_COUNTING)
res->refzero_list = NULL;
res->refzero_list_tail = NULL;
#endif
#if defined(DUK_USE_MARK_AND_SWEEP)
res->finalize_list = NULL;
#endif
res->heap_thread = NULL;
res->curr_thread = NULL;
res->heap_object = NULL;
#if defined(DUK_USE_STRTAB_CHAIN)
/* nothing to NULL */
#elif defined(DUK_USE_STRTAB_PROBE)
#if defined(DUK_USE_HEAPPTR16)
res->strtable16 = (duk_uint16_t *) NULL;
#else
res->strtable = (duk_hstring **) NULL;
#endif
#endif
#if defined(DUK_USE_ROM_STRINGS)
/* no res->strs[] */
#else /* DUK_USE_ROM_STRINGS */
#if defined(DUK_USE_HEAPPTR16)
/* res->strs16[] is zeroed and zero decodes to NULL, so no NULL inits. */
#else
{
duk_small_uint_t i;
for (i = 0; i < DUK_HEAP_NUM_STRINGS; i++) {
res->strs[i] = NULL;
}
}
#endif
#endif /* DUK_USE_ROM_STRINGS */
#if defined(DUK_USE_DEBUGGER_SUPPORT)
res->dbg_read_cb = NULL;
res->dbg_write_cb = NULL;
res->dbg_peek_cb = NULL;
res->dbg_read_flush_cb = NULL;
res->dbg_write_flush_cb = NULL;
res->dbg_request_cb = NULL;
res->dbg_udata = NULL;
res->dbg_step_thread = NULL;
#endif
#endif /* DUK_USE_EXPLICIT_NULL_INIT */
res->alloc_func = alloc_func;
res->realloc_func = realloc_func;
res->free_func = free_func;
res->heap_udata = heap_udata;
res->fatal_func = fatal_func;
#if defined(DUK_USE_HEAPPTR16)
/* XXX: zero assumption */
res->heapptr_null16 = DUK_USE_HEAPPTR_ENC16(res->heap_udata, (void *) NULL);
res->heapptr_deleted16 = DUK_USE_HEAPPTR_ENC16(res->heap_udata, (void *) DUK_STRTAB_DELETED_MARKER(res));
#endif
/* res->mark_and_sweep_trigger_counter == 0 -> now causes immediate GC; which is OK */
res->call_recursion_depth = 0;
res->call_recursion_limit = DUK_USE_NATIVE_CALL_RECLIMIT;
/* XXX: use the pointer as a seed for now: mix in time at least */
/* The casts through duk_intr_pt is to avoid the following GCC warning:
*
* warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
*
* This still generates a /Wp64 warning on VS2010 when compiling for x86.
*/
#if defined(DUK_USE_ROM_STRINGS)
/* XXX: make a common DUK_USE_ option, and allow custom fixed seed? */
DUK_D(DUK_DPRINT("using rom strings, force heap hash_seed to fixed value 0x%08lx", (long) DUK__FIXED_HASH_SEED));
res->hash_seed = (duk_uint32_t) DUK__FIXED_HASH_SEED;
#else /* DUK_USE_ROM_STRINGS */
res->hash_seed = (duk_uint32_t) (duk_intptr_t) res;
res->rnd_state = (duk_uint32_t) (duk_intptr_t) res;
#if !defined(DUK_USE_STRHASH_DENSE)
res->hash_seed ^= 5381; /* Bernstein hash init value is normally 5381; XOR it in in case pointer low bits are 0 */
#endif
#endif /* DUK_USE_ROM_STRINGS */
#if defined(DUK_USE_EXPLICIT_NULL_INIT)
res->lj.jmpbuf_ptr = NULL;
#endif
DUK_ASSERT(res->lj.type == DUK_LJ_TYPE_UNKNOWN); /* zero */
DUK_TVAL_SET_UNDEFINED(&res->lj.value1);
DUK_TVAL_SET_UNDEFINED(&res->lj.value2);
#if (DUK_STRTAB_INITIAL_SIZE < DUK_UTIL_MIN_HASH_PRIME)
#error initial heap stringtable size is defined incorrectly
#endif
/*
* Init stringtable: fixed variant
*/
#if defined(DUK_USE_STRTAB_CHAIN)
DUK_MEMZERO(res->strtable, sizeof(duk_strtab_entry) * DUK_STRTAB_CHAIN_SIZE);
#if defined(DUK_USE_EXPLICIT_NULL_INIT)
{
duk_small_uint_t i;
for (i = 0; i < DUK_STRTAB_CHAIN_SIZE; i++) {
#if defined(DUK_USE_HEAPPTR16)
res->strtable[i].u.str16 = res->heapptr_null16;
#else
res->strtable[i].u.str = NULL;
#endif
}
}
#endif /* DUK_USE_EXPLICIT_NULL_INIT */
#endif /* DUK_USE_STRTAB_CHAIN */
/*
* Init stringtable: probe variant
*/
#if defined(DUK_USE_STRTAB_PROBE)
#if defined(DUK_USE_HEAPPTR16)
res->strtable16 = (duk_uint16_t *) alloc_func(heap_udata, sizeof(duk_uint16_t) * DUK_STRTAB_INITIAL_SIZE);
if (!res->strtable16) {
goto error;
}
#else /* DUK_USE_HEAPPTR16 */
res->strtable = (duk_hstring **) alloc_func(heap_udata, sizeof(duk_hstring *) * DUK_STRTAB_INITIAL_SIZE);
if (!res->strtable) {
goto error;
}
#endif /* DUK_USE_HEAPPTR16 */
res->st_size = DUK_STRTAB_INITIAL_SIZE;
#if defined(DUK_USE_EXPLICIT_NULL_INIT)
{
duk_small_uint_t i;
DUK_ASSERT(res->st_size == DUK_STRTAB_INITIAL_SIZE);
for (i = 0; i < DUK_STRTAB_INITIAL_SIZE; i++) {
#if defined(DUK_USE_HEAPPTR16)
res->strtable16[i] = res->heapptr_null16;
#else
res->strtable[i] = NULL;
#endif
}
}
#else /* DUK_USE_EXPLICIT_NULL_INIT */
#if defined(DUK_USE_HEAPPTR16)
DUK_MEMZERO(res->strtable16, sizeof(duk_uint16_t) * DUK_STRTAB_INITIAL_SIZE);
#else
DUK_MEMZERO(res->strtable, sizeof(duk_hstring *) * DUK_STRTAB_INITIAL_SIZE);
#endif
#endif /* DUK_USE_EXPLICIT_NULL_INIT */
#endif /* DUK_USE_STRTAB_PROBE */
/*
* Init stringcache
*/
#if defined(DUK_USE_EXPLICIT_NULL_INIT)
{
duk_small_uint_t i;
for (i = 0; i < DUK_HEAP_STRCACHE_SIZE; i++) {
res->strcache[i].h = NULL;
}
}
#endif
/* XXX: error handling is incomplete. It would be cleanest if
* there was a setjmp catchpoint, so that all init code could
* freely throw errors. If that were the case, the return code
* passing here could be removed.
*/
/*
* Init built-in strings
*/
DUK_DD(DUK_DDPRINT("HEAP: INIT STRINGS"));
if (!duk__init_heap_strings(res)) {
goto error;
}
/*
* Init the heap thread
*/
DUK_DD(DUK_DDPRINT("HEAP: INIT HEAP THREAD"));
if (!duk__init_heap_thread(res)) {
goto error;
}
/*
* Init the heap object
*/
DUK_DD(DUK_DDPRINT("HEAP: INIT HEAP OBJECT"));
DUK_ASSERT(res->heap_thread != NULL);
res->heap_object = duk_hobject_alloc(res, DUK_HOBJECT_FLAG_EXTENSIBLE |
DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_OBJECT));
if (!res->heap_object) {
goto error;
}
DUK_HOBJECT_INCREF(res->heap_thread, res->heap_object);
/*
* All done
*/
DUK_D(DUK_DPRINT("allocated heap: %p", (void *) res));
return res;
error:
DUK_D(DUK_DPRINT("heap allocation failed"));
if (res) {
/* assumes that allocated pointers and alloc funcs are valid
* if res exists
*/
DUK_ASSERT(res->alloc_func != NULL);
DUK_ASSERT(res->realloc_func != NULL);
DUK_ASSERT(res->free_func != NULL);
duk_heap_free(res);
}
return NULL;
}
