diff options
Diffstat (limited to 'vpp/vppinfra/vppinfra/mheap.c')
| -rw-r--r-- | vpp/vppinfra/vppinfra/mheap.c | 1649 |
1 files changed, 1649 insertions, 0 deletions
diff --git a/vpp/vppinfra/vppinfra/mheap.c b/vpp/vppinfra/vppinfra/mheap.c new file mode 100644 index 00000000..b8828f9e --- /dev/null +++ b/vpp/vppinfra/vppinfra/mheap.c @@ -0,0 +1,1649 @@ +/* + * Copyright (c) 2015 Cisco and/or its affiliates. + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at: + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +/* + Copyright (c) 2001, 2002, 2003 Eliot Dresselhaus + + Permission is hereby granted, free of charge, to any person obtaining + a copy of this software and associated documentation files (the + "Software"), to deal in the Software without restriction, including + without limitation the rights to use, copy, modify, merge, publish, + distribute, sublicense, and/or sell copies of the Software, and to + permit persons to whom the Software is furnished to do so, subject to + the following conditions: + + The above copyright notice and this permission notice shall be + included in all copies or substantial portions of the Software. + + THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE + LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION + OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION + WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. +*/ + +#include <vppinfra/bitops.h> +#include <vppinfra/hash.h> +#include <vppinfra/format.h> +#include <vppinfra/mheap.h> +#include <vppinfra/os.h> +#include <vppinfra/time.h> + +#ifdef CLIB_UNIX +#include <vppinfra/elf_clib.h> +#endif + +static void mheap_get_trace (void *v, uword offset, uword size); +static void mheap_put_trace (void *v, uword offset, uword size); +static int mheap_trace_sort (const void *t1, const void *t2); + +always_inline void +mheap_maybe_lock (void *v) +{ + mheap_t *h = mheap_header (v); + if (v && (h->flags & MHEAP_FLAG_THREAD_SAFE)) + { + u32 my_cpu = os_get_cpu_number (); + if (h->owner_cpu == my_cpu) + { + h->recursion_count++; + return; + } + + while (__sync_lock_test_and_set (&h->lock, 1)) + ; + + h->owner_cpu = my_cpu; + h->recursion_count = 1; + } +} + +always_inline void +mheap_maybe_unlock (void *v) +{ + mheap_t *h = mheap_header (v); + if (v && h->flags & MHEAP_FLAG_THREAD_SAFE) + { + ASSERT (os_get_cpu_number () == h->owner_cpu); + if (--h->recursion_count == 0) + { + h->owner_cpu = ~0; + CLIB_MEMORY_BARRIER (); + h->lock = 0; + } + } +} + +/* Find bin for objects with size at least n_user_data_bytes. */ +always_inline uword +user_data_size_to_bin_index (uword n_user_data_bytes) +{ + uword n_user_data_words; + word small_bin, large_bin; + + /* User size must be at least big enough to hold free elt. */ + n_user_data_bytes = clib_max (n_user_data_bytes, MHEAP_MIN_USER_DATA_BYTES); + + /* Round to words. */ + n_user_data_words = + (round_pow2 (n_user_data_bytes, MHEAP_USER_DATA_WORD_BYTES) / + MHEAP_USER_DATA_WORD_BYTES); + + ASSERT (n_user_data_words > 0); + small_bin = + n_user_data_words - + (MHEAP_MIN_USER_DATA_BYTES / MHEAP_USER_DATA_WORD_BYTES); + ASSERT (small_bin >= 0); + + large_bin = + MHEAP_N_SMALL_OBJECT_BINS + max_log2 (n_user_data_bytes) - + MHEAP_LOG2_N_SMALL_OBJECT_BINS; + + return small_bin < MHEAP_N_SMALL_OBJECT_BINS ? small_bin : large_bin; +} + +always_inline uword +mheap_elt_size_to_user_n_bytes (uword n_bytes) +{ + ASSERT (n_bytes >= sizeof (mheap_elt_t)); + return (n_bytes - STRUCT_OFFSET_OF (mheap_elt_t, user_data)); +} + +always_inline uword __attribute__ ((unused)) +mheap_elt_size_to_user_n_words (uword n_bytes) +{ + ASSERT (n_bytes % MHEAP_USER_DATA_WORD_BYTES == 0); + return mheap_elt_size_to_user_n_bytes (n_bytes) / + MHEAP_USER_DATA_WORD_BYTES; +} + +always_inline void +mheap_elt_set_size (void *v, + uword uoffset, uword n_user_data_bytes, uword is_free) +{ + mheap_elt_t *e, *n; + + e = mheap_elt_at_uoffset (v, uoffset); + + ASSERT (n_user_data_bytes % MHEAP_USER_DATA_WORD_BYTES == 0); + + e->n_user_data = n_user_data_bytes / MHEAP_USER_DATA_WORD_BYTES; + e->is_free = is_free; + ASSERT (e->prev_n_user_data * sizeof (e->user_data[0]) >= + MHEAP_MIN_USER_DATA_BYTES); + + n = mheap_next_elt (e); + n->prev_n_user_data = e->n_user_data; + n->prev_is_free = is_free; +} + +always_inline void +set_first_free_elt_offset (mheap_t * h, uword bin, uword uoffset) +{ + uword i0, i1; + + h->first_free_elt_uoffset_by_bin[bin] = uoffset; + + i0 = bin / BITS (h->non_empty_free_elt_heads[0]); + i1 = (uword) 1 << (uword) (bin % BITS (h->non_empty_free_elt_heads[0])); + + ASSERT (i0 < ARRAY_LEN (h->non_empty_free_elt_heads)); + if (h->first_free_elt_uoffset_by_bin[bin] == MHEAP_GROUNDED) + h->non_empty_free_elt_heads[i0] &= ~i1; + else + h->non_empty_free_elt_heads[i0] |= i1; +} + +always_inline void +set_free_elt (void *v, uword uoffset, uword n_user_data_bytes) +{ + mheap_t *h = mheap_header (v); + mheap_elt_t *e = mheap_elt_at_uoffset (v, uoffset); + mheap_elt_t *n = mheap_next_elt (e); + uword bin = user_data_size_to_bin_index (n_user_data_bytes); + + ASSERT (n->prev_is_free); + ASSERT (e->is_free); + + e->free_elt.prev_uoffset = MHEAP_GROUNDED; + e->free_elt.next_uoffset = h->first_free_elt_uoffset_by_bin[bin]; + + /* Fill in next free elt's previous pointer. */ + if (e->free_elt.next_uoffset != MHEAP_GROUNDED) + { + mheap_elt_t *nf = mheap_elt_at_uoffset (v, e->free_elt.next_uoffset); + ASSERT (nf->is_free); + nf->free_elt.prev_uoffset = uoffset; + } + + set_first_free_elt_offset (h, bin, uoffset); +} + +always_inline void +new_free_elt (void *v, uword uoffset, uword n_user_data_bytes) +{ + mheap_elt_set_size (v, uoffset, n_user_data_bytes, /* is_free */ 1); + set_free_elt (v, uoffset, n_user_data_bytes); +} + +always_inline void +remove_free_elt (void *v, mheap_elt_t * e, uword bin) +{ + mheap_t *h = mheap_header (v); + mheap_elt_t *p, *n; +#if CLIB_VEC64 > 0 + u64 no, po; +#else + u32 no, po; +#endif + + no = e->free_elt.next_uoffset; + + n = no != MHEAP_GROUNDED ? mheap_elt_at_uoffset (v, no) : 0; + po = e->free_elt.prev_uoffset; + p = po != MHEAP_GROUNDED ? mheap_elt_at_uoffset (v, po) : 0; + + if (!p) + set_first_free_elt_offset (h, bin, no); + else + p->free_elt.next_uoffset = no; + + if (n) + n->free_elt.prev_uoffset = po; +} + +always_inline void +remove_free_elt2 (void *v, mheap_elt_t * e) +{ + uword bin; + bin = user_data_size_to_bin_index (mheap_elt_data_bytes (e)); + remove_free_elt (v, e, bin); +} + +#define MHEAP_VM_MAP (1 << 0) +#define MHEAP_VM_UNMAP (1 << 1) +#define MHEAP_VM_NOMAP (0 << 1) +#define MHEAP_VM_ROUND (1 << 2) +#define MHEAP_VM_ROUND_UP MHEAP_VM_ROUND +#define MHEAP_VM_ROUND_DOWN (0 << 2) + +static uword mheap_page_size; + +static_always_inline uword +mheap_page_round (uword addr) +{ + return (addr + mheap_page_size - 1) & ~(mheap_page_size - 1); +} + +static_always_inline uword +mheap_page_truncate (uword addr) +{ + return addr & ~(mheap_page_size - 1); +} + +static_always_inline uword +mheap_vm (void *v, uword flags, clib_address_t start_addr, uword size) +{ + mheap_t *h = mheap_header (v); + clib_address_t start_page, end_page, end_addr; + uword mapped_bytes; + + ASSERT (!(h->flags & MHEAP_FLAG_DISABLE_VM)); + + end_addr = start_addr + size; + + /* Round start/end address up to page boundary. */ + start_page = mheap_page_round (start_addr); + + if ((flags & MHEAP_VM_ROUND) == MHEAP_VM_ROUND_UP) + end_page = mheap_page_round (end_addr); + else + end_page = mheap_page_truncate (end_addr); + + mapped_bytes = 0; + if (end_page > start_page) + { + mapped_bytes = end_page - start_page; + if (flags & MHEAP_VM_MAP) + clib_mem_vm_map ((void *) start_page, end_page - start_page); + else if (flags & MHEAP_VM_UNMAP) + clib_mem_vm_unmap ((void *) start_page, end_page - start_page); + } + + return mapped_bytes; +} + +static_always_inline uword +mheap_vm_elt (void *v, uword flags, uword offset) +{ + mheap_elt_t *e; + clib_address_t start_addr, end_addr; + + e = mheap_elt_at_uoffset (v, offset); + start_addr = (clib_address_t) ((void *) e->user_data); + end_addr = (clib_address_t) mheap_next_elt (e); + return mheap_vm (v, flags, start_addr, end_addr - start_addr); +} + +always_inline uword +mheap_small_object_cache_mask (mheap_small_object_cache_t * c, uword bin) +{ + uword mask; + +/* $$$$ ELIOT FIXME: add Altivec version of this routine */ +#if !defined (CLIB_HAVE_VEC128) || defined (__ALTIVEC__) + mask = 0; +#else + u8x16 b = u8x16_splat (bin); + + ASSERT (bin < 256); + +#define _(i) ((uword) u8x16_compare_byte_mask (u8x16_is_equal (b, c->bins.as_u8x16[i])) << (uword) ((i)*16)) + mask = _(0) | _(1); + if (BITS (uword) > 32) + mask |= _(2) | _(3); +#undef _ + +#endif + return mask; +} + +always_inline uword +mheap_get_small_object (mheap_t * h, uword bin) +{ + mheap_small_object_cache_t *c = &h->small_object_cache; + uword mask = mheap_small_object_cache_mask (c, bin + 1); + uword offset = MHEAP_GROUNDED; + + if (mask) + { + uword i = min_log2 (mask); + uword o = c->offsets[i]; + ASSERT (o != MHEAP_GROUNDED); + c->bins.as_u8[i] = 0; + offset = o; + } + + return offset; +} + +always_inline uword +mheap_put_small_object (mheap_t * h, uword bin, uword offset) +{ + mheap_small_object_cache_t *c = &h->small_object_cache; + uword free_mask = mheap_small_object_cache_mask (c, 0); + uword b = bin + 1; + uword i; + + if (free_mask != 0) + { + i = min_log2 (free_mask); + c->bins.as_u8[i] = b; + c->offsets[i] = offset; + return 0; + } + else + /* Nothing free with right size: cyclic replacement. */ + { + uword old_offset; + + i = c->replacement_index++; + i %= BITS (uword); + c->bins.as_u8[i] = b; + old_offset = c->offsets[i]; + c->offsets[i] = offset; + + /* Return old offset so it can be freed. */ + return old_offset; + } +} + +static uword +mheap_get_search_free_bin (void *v, + uword bin, + uword * n_user_data_bytes_arg, + uword align, uword align_offset) +{ + mheap_t *h = mheap_header (v); + mheap_elt_t *e; + + /* Free object is at offset f0 ... f1; + Allocatted object is at offset o0 ... o1. */ + word o0, o1, f0, f1, search_n_user_data_bytes; + word lo_free_usize, hi_free_usize; + + ASSERT (h->first_free_elt_uoffset_by_bin[bin] != MHEAP_GROUNDED); + e = mheap_elt_at_uoffset (v, h->first_free_elt_uoffset_by_bin[bin]); + + search_n_user_data_bytes = *n_user_data_bytes_arg; + + /* Silence compiler warning. */ + o0 = o1 = f0 = f1 = 0; + + h->stats.free_list.n_search_attempts += 1; + + /* Find an object that is large enough with correct alignment at given alignment offset. */ + while (1) + { + uword this_object_n_user_data_bytes = mheap_elt_data_bytes (e); + + ASSERT (e->is_free); + if (bin < MHEAP_N_SMALL_OBJECT_BINS) + ASSERT (this_object_n_user_data_bytes >= search_n_user_data_bytes); + + h->stats.free_list.n_objects_searched += 1; + + if (this_object_n_user_data_bytes < search_n_user_data_bytes) + goto next; + + /* Bounds of free object: from f0 to f1. */ + f0 = ((void *) e->user_data - v); + f1 = f0 + this_object_n_user_data_bytes; + + /* Place candidate object at end of free block and align as requested. */ + o0 = ((f1 - search_n_user_data_bytes) & ~(align - 1)) - align_offset; + while (o0 < f0) + o0 += align; + + /* Make sure that first free fragment is either empty or + large enough to be valid. */ + while (1) + { + lo_free_usize = o0 != f0 ? o0 - f0 - MHEAP_ELT_OVERHEAD_BYTES : 0; + if (o0 <= f0 || lo_free_usize >= (word) MHEAP_MIN_USER_DATA_BYTES) + break; + o0 -= align; + } + + o1 = o0 + search_n_user_data_bytes; + + /* Does it fit? */ + if (o0 >= f0 && o1 <= f1) + goto found; + + next: + /* Reached end of free list without finding large enough object. */ + if (e->free_elt.next_uoffset == MHEAP_GROUNDED) + return MHEAP_GROUNDED; + + /* Otherwise keep searching for large enough object. */ + e = mheap_elt_at_uoffset (v, e->free_elt.next_uoffset); + } + +found: + /* Free fragment at end. */ + hi_free_usize = f1 != o1 ? f1 - o1 - MHEAP_ELT_OVERHEAD_BYTES : 0; + + /* If fragment at end is too small to be a new object, + give user's object a bit more space than requested. */ + if (hi_free_usize < (word) MHEAP_MIN_USER_DATA_BYTES) + { + search_n_user_data_bytes += f1 - o1; + o1 = f1; + hi_free_usize = 0; + } + + /* Need to make sure that relevant memory areas are mapped. */ + if (!(h->flags & MHEAP_FLAG_DISABLE_VM)) + { + mheap_elt_t *f0_elt = mheap_elt_at_uoffset (v, f0); + mheap_elt_t *f1_elt = mheap_elt_at_uoffset (v, f1); + mheap_elt_t *o0_elt = mheap_elt_at_uoffset (v, o0); + mheap_elt_t *o1_elt = mheap_elt_at_uoffset (v, o1); + + uword f0_page_start, f0_page_end; + uword o0_page_start, o0_page_end; + + /* Free elt is mapped. Addresses after that may not be mapped. */ + f0_page_start = mheap_page_round (pointer_to_uword (f0_elt->user_data)); + f0_page_end = mheap_page_truncate (pointer_to_uword (f1_elt)); + + o0_page_start = mheap_page_truncate (pointer_to_uword (o0_elt)); + o0_page_end = mheap_page_round (pointer_to_uword (o1_elt->user_data)); + + if (o0_page_start < f0_page_start) + o0_page_start = f0_page_start; + if (o0_page_end > f0_page_end) + o0_page_end = f0_page_end; + + if (o0_page_end > o0_page_start) + clib_mem_vm_map (uword_to_pointer (o0_page_start, void *), + o0_page_end - o0_page_start); + } + + /* Remove free object from free list. */ + remove_free_elt (v, e, bin); + + /* Free fragment at begining. */ + if (lo_free_usize > 0) + { + ASSERT (lo_free_usize >= (word) MHEAP_MIN_USER_DATA_BYTES); + mheap_elt_set_size (v, f0, lo_free_usize, /* is_free */ 1); + new_free_elt (v, f0, lo_free_usize); + } + + mheap_elt_set_size (v, o0, search_n_user_data_bytes, /* is_free */ 0); + + if (hi_free_usize > 0) + { + uword uo = o1 + MHEAP_ELT_OVERHEAD_BYTES; + mheap_elt_set_size (v, uo, hi_free_usize, /* is_free */ 1); + new_free_elt (v, uo, hi_free_usize); + } + + /* Return actual size of block. */ + *n_user_data_bytes_arg = search_n_user_data_bytes; + + h->stats.free_list.n_objects_found += 1; + + return o0; +} + +/* Search free lists for object with given size and alignment. */ +static uword +mheap_get_search_free_list (void *v, + uword * n_user_bytes_arg, + uword align, uword align_offset) +{ + mheap_t *h = mheap_header (v); + uword bin, n_user_bytes, i, bi; + + n_user_bytes = *n_user_bytes_arg; + bin = user_data_size_to_bin_index (n_user_bytes); + + if (MHEAP_HAVE_SMALL_OBJECT_CACHE + && (h->flags & MHEAP_FLAG_SMALL_OBJECT_CACHE) + && bin < 255 + && align == STRUCT_SIZE_OF (mheap_elt_t, user_data[0]) + && align_offset == 0) + { + uword r = mheap_get_small_object (h, bin); + h->stats.n_small_object_cache_attempts += 1; + if (r != MHEAP_GROUNDED) + { + h->stats.n_small_object_cache_hits += 1; + return r; + } + } + + for (i = bin / BITS (uword); i < ARRAY_LEN (h->non_empty_free_elt_heads); + i++) + { + uword non_empty_bin_mask = h->non_empty_free_elt_heads[i]; + + /* No need to search smaller bins. */ + if (i == bin / BITS (uword)) + non_empty_bin_mask &= ~pow2_mask (bin % BITS (uword)); + + /* Search each occupied free bin which is large enough. */ + foreach_set_bit (bi, non_empty_bin_mask, ( + { + uword r = + mheap_get_search_free_bin (v, + bi + + + i + * + BITS + (uword), + n_user_bytes_arg, + align, + align_offset); + if (r != + MHEAP_GROUNDED) return + r;} + )); + } + + return MHEAP_GROUNDED; +} + +static never_inline void * +mheap_get_extend_vector (void *v, + uword n_user_data_bytes, + uword align, + uword align_offset, uword * offset_return) +{ + /* Bounds of free and allocated objects (as above). */ + uword f0, f1, o0, o1; + word free_size; + mheap_t *h = mheap_header (v); + mheap_elt_t *e; + + if (_vec_len (v) == 0) + { + _vec_len (v) = MHEAP_ELT_OVERHEAD_BYTES; + + /* Create first element of heap. */ + e = mheap_elt_at_uoffset (v, _vec_len (v)); + e->prev_n_user_data = MHEAP_N_USER_DATA_INVALID; + } + + f0 = _vec_len (v); + + o0 = round_pow2 (f0, align) - align_offset; + while (1) + { + free_size = o0 - f0 - MHEAP_ELT_OVERHEAD_BYTES; + if (o0 == f0 || free_size >= (word) sizeof (mheap_elt_t)) + break; + + o0 += align; + } + + o1 = o0 + n_user_data_bytes; + f1 = o1 + MHEAP_ELT_OVERHEAD_BYTES; + + ASSERT (v != 0); + h = mheap_header (v); + + /* Make sure we have space for object plus overhead. */ + if (f1 > h->max_size) + { + *offset_return = MHEAP_GROUNDED; + return v; + } + + _vec_len (v) = f1; + + if (!(h->flags & MHEAP_FLAG_DISABLE_VM)) + { + mheap_elt_t *f0_elt = mheap_elt_at_uoffset (v, f0); + mheap_elt_t *f1_elt = mheap_elt_at_uoffset (v, f1); + + uword f0_page = mheap_page_round (pointer_to_uword (f0_elt->user_data)); + uword f1_page = mheap_page_round (pointer_to_uword (f1_elt->user_data)); + + if (f1_page > f0_page) + mheap_vm (v, MHEAP_VM_MAP, f0_page, f1_page - f0_page); + } + + if (free_size > 0) + new_free_elt (v, f0, free_size); + + mheap_elt_set_size (v, o0, n_user_data_bytes, /* is_free */ 0); + + /* Mark last element. */ + e = mheap_elt_at_uoffset (v, f1); + e->n_user_data = MHEAP_N_USER_DATA_INVALID; + + *offset_return = o0; + + return v; +} + +void * +mheap_get_aligned (void *v, + uword n_user_data_bytes, + uword align, uword align_offset, uword * offset_return) +{ + mheap_t *h; + uword offset; + u64 cpu_times[2]; + + cpu_times[0] = clib_cpu_time_now (); + + align = clib_max (align, STRUCT_SIZE_OF (mheap_elt_t, user_data[0])); + align = max_pow2 (align); + + /* Correct align offset to be smaller than alignment. */ + align_offset &= (align - 1); + + /* Align offset must be multiple of minimum object size. */ + if (align_offset % STRUCT_SIZE_OF (mheap_elt_t, user_data[0]) != 0) + { + *offset_return = MHEAP_GROUNDED; + return v; + } + + /* Round requested size. */ + n_user_data_bytes = clib_max (n_user_data_bytes, MHEAP_MIN_USER_DATA_BYTES); + n_user_data_bytes = + round_pow2 (n_user_data_bytes, + STRUCT_SIZE_OF (mheap_elt_t, user_data[0])); + + if (!v) + v = mheap_alloc (0, 64 << 20); + + mheap_maybe_lock (v); + + h = mheap_header (v); + + if (h->flags & MHEAP_FLAG_VALIDATE) + mheap_validate (v); + + /* First search free lists for object. */ + offset = + mheap_get_search_free_list (v, &n_user_data_bytes, align, align_offset); + + h = mheap_header (v); + + /* If that fails allocate object at end of heap by extending vector. */ + if (offset == MHEAP_GROUNDED && _vec_len (v) < h->max_size) + { + v = + mheap_get_extend_vector (v, n_user_data_bytes, align, align_offset, + &offset); + h = mheap_header (v); + h->stats.n_vector_expands += offset != MHEAP_GROUNDED; + } + + *offset_return = offset; + if (offset != MHEAP_GROUNDED) + { + h->n_elts += 1; + + if (h->flags & MHEAP_FLAG_TRACE) + { + /* Recursion block for case when we are traceing main clib heap. */ + h->flags &= ~MHEAP_FLAG_TRACE; + + mheap_get_trace (v, offset, n_user_data_bytes); + + h->flags |= MHEAP_FLAG_TRACE; + } + } + + if (h->flags & MHEAP_FLAG_VALIDATE) + mheap_validate (v); + + mheap_maybe_unlock (v); + + cpu_times[1] = clib_cpu_time_now (); + h->stats.n_clocks_get += cpu_times[1] - cpu_times[0]; + h->stats.n_gets += 1; + + return v; +} + +static void +free_last_elt (void *v, mheap_elt_t * e) +{ + mheap_t *h = mheap_header (v); + + /* Possibly delete preceeding free element also. */ + if (e->prev_is_free) + { + e = mheap_prev_elt (e); + remove_free_elt2 (v, e); + } + + if (e->prev_n_user_data == MHEAP_N_USER_DATA_INVALID) + { + if (!(h->flags & MHEAP_FLAG_DISABLE_VM)) + mheap_vm_elt (v, MHEAP_VM_UNMAP, mheap_elt_uoffset (v, e)); + _vec_len (v) = 0; + } + else + { + uword uo = mheap_elt_uoffset (v, e); + if (!(h->flags & MHEAP_FLAG_DISABLE_VM)) + mheap_vm_elt (v, MHEAP_VM_UNMAP, uo); + e->n_user_data = MHEAP_N_USER_DATA_INVALID; + _vec_len (v) = uo; + } +} + +void +mheap_put (void *v, uword uoffset) +{ + mheap_t *h; + uword n_user_data_bytes, bin; + mheap_elt_t *e, *n; + uword trace_uoffset, trace_n_user_data_bytes; + u64 cpu_times[2]; + + cpu_times[0] = clib_cpu_time_now (); + + h = mheap_header (v); + + mheap_maybe_lock (v); + + if (h->flags & MHEAP_FLAG_VALIDATE) + mheap_validate (v); + + ASSERT (h->n_elts > 0); + h->n_elts--; + h->stats.n_puts += 1; + + e = mheap_elt_at_uoffset (v, uoffset); + n = mheap_next_elt (e); + n_user_data_bytes = mheap_elt_data_bytes (e); + + trace_uoffset = uoffset; + trace_n_user_data_bytes = n_user_data_bytes; + + bin = user_data_size_to_bin_index (n_user_data_bytes); + if (MHEAP_HAVE_SMALL_OBJECT_CACHE + && bin < 255 && (h->flags & MHEAP_FLAG_SMALL_OBJECT_CACHE)) + { + uoffset = mheap_put_small_object (h, bin, uoffset); + if (uoffset == 0) + goto done; + + e = mheap_elt_at_uoffset (v, uoffset); + n = mheap_next_elt (e); + n_user_data_bytes = mheap_elt_data_bytes (e); + } + + /* Assert that forward and back pointers are equal. */ + if (e->n_user_data != n->prev_n_user_data) + os_panic (); + + /* Forward and backwards is_free must agree. */ + if (e->is_free != n->prev_is_free) + os_panic (); + + /* Object was already freed. */ + if (e->is_free) + os_panic (); + + /* Special case: delete last element in heap. */ + if (n->n_user_data == MHEAP_N_USER_DATA_INVALID) + free_last_elt (v, e); + + else + { + uword f0, f1, n_combine; + + f0 = uoffset; + f1 = f0 + n_user_data_bytes; + n_combine = 0; + + if (e->prev_is_free) + { + mheap_elt_t *p = mheap_prev_elt (e); + f0 = mheap_elt_uoffset (v, p); + remove_free_elt2 (v, p); + n_combine++; + } + + if (n->is_free) + { + mheap_elt_t *m = mheap_next_elt (n); + f1 = (void *) m - v; + remove_free_elt2 (v, n); + n_combine++; + } + + if (n_combine) + mheap_elt_set_size (v, f0, f1 - f0, /* is_free */ 1); + else + e->is_free = n->prev_is_free = 1; + set_free_elt (v, f0, f1 - f0); + + if (!(h->flags & MHEAP_FLAG_DISABLE_VM)) + mheap_vm_elt (v, MHEAP_VM_UNMAP, f0); + } + +done: + h = mheap_header (v); + + if (h->flags & MHEAP_FLAG_TRACE) + { + /* Recursion block for case when we are traceing main clib heap. */ + h->flags &= ~MHEAP_FLAG_TRACE; + + mheap_put_trace (v, trace_uoffset, trace_n_user_data_bytes); + + h->flags |= MHEAP_FLAG_TRACE; + } + + if (h->flags & MHEAP_FLAG_VALIDATE) + mheap_validate (v); + + mheap_maybe_unlock (v); + + cpu_times[1] = clib_cpu_time_now (); + h->stats.n_clocks_put += cpu_times[1] - cpu_times[0]; +} + +void * +mheap_alloc_with_flags (void *memory, uword memory_size, uword flags) +{ + mheap_t *h; + void *v; + uword size; + + if (!mheap_page_size) + mheap_page_size = clib_mem_get_page_size (); + + if (!memory) + { + /* No memory given, try to VM allocate some. */ + memory = clib_mem_vm_alloc (memory_size); + if (!memory) + return 0; + + /* No memory region implies we have virtual memory. */ + flags &= ~MHEAP_FLAG_DISABLE_VM; + } + + /* Make sure that given memory is page aligned. */ + { + uword am, av, ah; + + am = pointer_to_uword (memory); + av = mheap_page_round (am); + v = uword_to_pointer (av, void *); + h = mheap_header (v); + ah = pointer_to_uword (h); + while (ah < am) + ah += mheap_page_size; + + h = uword_to_pointer (ah, void *); + v = mheap_vector (h); + + if (PREDICT_FALSE (memory + memory_size < v)) + { + /* + * This will happen when the requested memory_size is too + * small to cope with the heap header and/or memory alignment. + */ + clib_mem_vm_free (memory, memory_size); + return 0; + } + + size = memory + memory_size - v; + } + + /* VM map header so we can use memory. */ + if (!(flags & MHEAP_FLAG_DISABLE_VM)) + clib_mem_vm_map (h, sizeof (h[0])); + + /* Zero vector header: both heap header and vector length. */ + memset (h, 0, sizeof (h[0])); + _vec_len (v) = 0; + + h->vm_alloc_offset_from_header = (void *) h - memory; + h->vm_alloc_size = memory_size; + + h->max_size = size; + h->owner_cpu = ~0; + + /* Set flags based on those given less builtin-flags. */ + h->flags |= (flags & ~MHEAP_FLAG_TRACE); + + /* Unmap remainder of heap until we will be ready to use it. */ + if (!(h->flags & MHEAP_FLAG_DISABLE_VM)) + mheap_vm (v, MHEAP_VM_UNMAP | MHEAP_VM_ROUND_UP, + (clib_address_t) v, h->max_size); + + /* Initialize free list heads to empty. */ + memset (h->first_free_elt_uoffset_by_bin, 0xFF, + sizeof (h->first_free_elt_uoffset_by_bin)); + + return v; +} + +void * +mheap_alloc (void *memory, uword size) +{ + uword flags = 0; + + if (memory != 0) + flags |= MHEAP_FLAG_DISABLE_VM; + +#ifdef CLIB_HAVE_VEC128 + flags |= MHEAP_FLAG_SMALL_OBJECT_CACHE; +#endif + + return mheap_alloc_with_flags (memory, size, flags); +} + +void * +_mheap_free (void *v) +{ + mheap_t *h = mheap_header (v); + + if (v) + clib_mem_vm_free ((void *) h - h->vm_alloc_offset_from_header, + h->vm_alloc_size); + + return 0; +} + +/* Call user's function with each object in heap. */ +void +mheap_foreach (void *v, + uword (*func) (void *arg, void *v, void *elt_data, + uword elt_size), void *arg) +{ + mheap_elt_t *e; + u8 *stack_heap, *clib_mem_mheap_save; + u8 tmp_heap_memory[16 * 1024]; + + mheap_maybe_lock (v); + + if (vec_len (v) == 0) + goto done; + + clib_mem_mheap_save = 0; + stack_heap = 0; + + /* Allocate a new temporary heap on the stack. + This is so that our hash table & user's callback function can + themselves allocate memory somewhere without getting in the way + of the heap we are looking at. */ + if (v == clib_mem_get_heap ()) + { + stack_heap = mheap_alloc (tmp_heap_memory, sizeof (tmp_heap_memory)); + clib_mem_mheap_save = v; + clib_mem_set_heap (stack_heap); + } + + for (e = v; + e->n_user_data != MHEAP_N_USER_DATA_INVALID; e = mheap_next_elt (e)) + { + void *p = mheap_elt_data (v, e); + if (e->is_free) + continue; + if ((*func) (arg, v, p, mheap_elt_data_bytes (e))) + break; + } + + /* Restore main CLIB heap. */ + if (clib_mem_mheap_save) + clib_mem_set_heap (clib_mem_mheap_save); + +done: + mheap_maybe_unlock (v); +} + +/* Bytes in mheap header overhead not including data bytes. */ +always_inline uword +mheap_bytes_overhead (void *v) +{ + mheap_t *h = mheap_header (v); + return v ? sizeof (h[0]) + h->n_elts * sizeof (mheap_elt_t) : 0; +} + +/* Total number of bytes including both data and overhead. */ +uword +mheap_bytes (void *v) +{ + return mheap_bytes_overhead (v) + vec_bytes (v); +} + +static void +mheap_usage_no_lock (void *v, clib_mem_usage_t * usage) +{ + mheap_t *h = mheap_header (v); + uword used = 0, free = 0, free_vm_unmapped = 0; + + if (vec_len (v) > 0) + { + mheap_elt_t *e; + + for (e = v; + e->n_user_data != MHEAP_N_USER_DATA_INVALID; + e = mheap_next_elt (e)) + { + uword size = mheap_elt_data_bytes (e); + if (e->is_free) + { + free += size; + if (!(h->flags & MHEAP_FLAG_DISABLE_VM)) + free_vm_unmapped += + mheap_vm_elt (v, MHEAP_VM_NOMAP, mheap_elt_uoffset (v, e)); + } + else + used += size; + } + } + + usage->object_count = mheap_elts (v); + usage->bytes_total = mheap_bytes (v); + usage->bytes_overhead = mheap_bytes_overhead (v); + usage->bytes_max = mheap_max_size (v); + usage->bytes_used = used; + usage->bytes_free = free; + usage->bytes_free_reclaimed = free_vm_unmapped; +} + +void +mheap_usage (void *v, clib_mem_usage_t * usage) +{ + mheap_maybe_lock (v); + mheap_usage_no_lock (v, usage); + mheap_maybe_unlock (v); +} + +static u8 * +format_mheap_byte_count (u8 * s, va_list * va) +{ + uword n_bytes = va_arg (*va, uword); + if (n_bytes < 1024) + return format (s, "%wd", n_bytes); + else + return format (s, "%wdk", n_bytes / 1024); +} + +/* Returns first corrupt heap element. */ +static mheap_elt_t * +mheap_first_corrupt (void *v) +{ + mheap_elt_t *e, *n; + + if (vec_len (v) == 0) + return 0; + + e = v; + while (1) + { + if (e->n_user_data == MHEAP_N_USER_DATA_INVALID) + break; + + n = mheap_next_elt (e); + + if (e->n_user_data != n->prev_n_user_data) + return e; + + if (e->is_free != n->prev_is_free) + return e; + + e = n; + } + + return 0; +} + +static u8 * +format_mheap_stats (u8 * s, va_list * va) +{ + mheap_t *h = va_arg (*va, mheap_t *); + mheap_stats_t *st = &h->stats; + uword indent = format_get_indent (s); + + s = + format (s, + "alloc. from small object cache: %Ld hits %Ld attempts (%.2f%%) replacements %d", + st->n_small_object_cache_hits, st->n_small_object_cache_attempts, + (st->n_small_object_cache_attempts != + 0 ? 100. * (f64) st->n_small_object_cache_hits / + (f64) st->n_small_object_cache_attempts : 0.), + h->small_object_cache.replacement_index); + + s = + format (s, + "\n%Ualloc. from free-list: %Ld attempts, %Ld hits (%.2f%%), %Ld considered (per-attempt %.2f)", + format_white_space, indent, st->free_list.n_search_attempts, + st->free_list.n_objects_found, + (st->free_list.n_search_attempts != + 0 ? 100. * (f64) st->free_list.n_objects_found / + (f64) st->free_list.n_search_attempts : 0.), + st->free_list.n_objects_searched, + (st->free_list.n_search_attempts != + 0 ? (f64) st->free_list.n_objects_searched / + (f64) st->free_list.n_search_attempts : 0.)); + + s = format (s, "\n%Ualloc. from vector-expand: %Ld", + format_white_space, indent, st->n_vector_expands); + + s = format (s, "\n%Uallocs: %Ld %.2f clocks/call", + format_white_space, indent, + st->n_gets, (f64) st->n_clocks_get / (f64) st->n_gets); + + s = format (s, "\n%Ufrees: %Ld %.2f clocks/call", + format_white_space, indent, + st->n_puts, (f64) st->n_clocks_put / (f64) st->n_puts); + + return s; +} + +u8 * +format_mheap (u8 * s, va_list * va) +{ + void *v = va_arg (*va, u8 *); + int verbose = va_arg (*va, int); + + mheap_t *h; + uword i, size, indent; + clib_mem_usage_t usage; + mheap_elt_t *first_corrupt; + + mheap_maybe_lock (v); + + h = mheap_header (v); + + mheap_usage_no_lock (v, &usage); + + indent = format_get_indent (s); + + s = + format (s, + "%d objects, %U of %U used, %U free, %U reclaimed, %U overhead", + usage.object_count, format_mheap_byte_count, usage.bytes_used, + format_mheap_byte_count, usage.bytes_total, + format_mheap_byte_count, usage.bytes_free, + format_mheap_byte_count, usage.bytes_free_reclaimed, + format_mheap_byte_count, usage.bytes_overhead); + + if (usage.bytes_max != ~0) + s = format (s, ", %U capacity", format_mheap_byte_count, usage.bytes_max); + + /* Show histogram of sizes. */ + if (verbose > 1) + { + uword hist[MHEAP_N_BINS]; + mheap_elt_t *e; + uword i, n_hist; + + memset (hist, 0, sizeof (hist)); + + n_hist = 0; + for (e = v; + e->n_user_data != MHEAP_N_USER_DATA_INVALID; + e = mheap_next_elt (e)) + { + uword n_user_data_bytes = mheap_elt_data_bytes (e); + uword bin = user_data_size_to_bin_index (n_user_data_bytes); + if (!e->is_free) + { + hist[bin] += 1; + n_hist += 1; + } + } + + s = format (s, "\n%U%=12s%=12s%=16s", + format_white_space, indent + 2, + "Size", "Count", "Fraction"); + + for (i = 0; i < ARRAY_LEN (hist); i++) + { + if (hist[i] == 0) + continue; + s = format (s, "\n%U%12d%12wd%16.4f", + format_white_space, indent + 2, + MHEAP_MIN_USER_DATA_BYTES + + i * MHEAP_USER_DATA_WORD_BYTES, hist[i], + (f64) hist[i] / (f64) n_hist); + } + } + + if (verbose) + s = format (s, "\n%U%U", + format_white_space, indent + 2, format_mheap_stats, h); + + if ((h->flags & MHEAP_FLAG_TRACE) && vec_len (h->trace_main.traces) > 0) + { + /* Make a copy of traces since we'll be sorting them. */ + mheap_trace_t *t, *traces_copy; + uword indent, total_objects_traced; + + traces_copy = vec_dup (h->trace_main.traces); + qsort (traces_copy, vec_len (traces_copy), sizeof (traces_copy[0]), + mheap_trace_sort); + + total_objects_traced = 0; + s = format (s, "\n"); + vec_foreach (t, traces_copy) + { + /* Skip over free elements. */ + if (t->n_allocations == 0) + continue; + + total_objects_traced += t->n_allocations; + + /* When not verbose only report allocations of more than 1k. */ + if (!verbose && t->n_bytes < 1024) + continue; + + if (t == traces_copy) + s = format (s, "%=9s%=9s %=10s Traceback\n", "Bytes", "Count", + "Sample"); + s = format (s, "%9d%9d %p", t->n_bytes, t->n_allocations, + t->offset + v); + indent = format_get_indent (s); + for (i = 0; i < ARRAY_LEN (t->callers) && t->callers[i]; i++) + { + if (i > 0) + s = format (s, "%U", format_white_space, indent); +#ifdef CLIB_UNIX + s = + format (s, " %U\n", format_clib_elf_symbol_with_address, + t->callers[i]); +#else + s = format (s, " %p\n", t->callers[i]); +#endif + } + } + + s = format (s, "%d total traced objects\n", total_objects_traced); + + vec_free (traces_copy); + } + + first_corrupt = mheap_first_corrupt (v); + if (first_corrupt) + { + size = mheap_elt_data_bytes (first_corrupt); + s = format (s, "\n first corrupt object: %p, size %wd\n %U", + first_corrupt, size, format_hex_bytes, first_corrupt, size); + } + + /* FIXME. This output could be wrong in the unlikely case that format + uses the same mheap as we are currently inspecting. */ + if (verbose > 1) + { + mheap_elt_t *e; + uword i, o; + + s = format (s, "\n"); + + e = mheap_elt_at_uoffset (v, 0); + i = 0; + while (1) + { + if ((i % 8) == 0) + s = format (s, "%8d: ", i); + + o = mheap_elt_uoffset (v, e); + + if (e->is_free) + s = format (s, "(%8d) ", o); + else + s = format (s, " %8d ", o); + + if ((i % 8) == 7 || (i + 1) >= h->n_elts) + s = format (s, "\n"); + } + } + + mheap_maybe_unlock (v); + + return s; +} + +void +dmh (void *v) +{ + fformat (stderr, "%U", format_mheap, v, 1); +} + +static void +mheap_validate_breakpoint () +{ + os_panic (); +} + +void +mheap_validate (void *v) +{ + mheap_t *h = mheap_header (v); + uword i, s; + + uword elt_count, elt_size; + uword free_count_from_free_lists, free_size_from_free_lists; + uword small_elt_free_count, small_elt_free_size; + +#define CHECK(x) if (! (x)) { mheap_validate_breakpoint (); os_panic (); } + + if (vec_len (v) == 0) + return; + + mheap_maybe_lock (v); + + /* Validate number of elements and size. */ + free_size_from_free_lists = free_count_from_free_lists = 0; + for (i = 0; i < ARRAY_LEN (h->first_free_elt_uoffset_by_bin); i++) + { + mheap_elt_t *e, *n; + uword is_first; + + CHECK ((h->first_free_elt_uoffset_by_bin[i] != MHEAP_GROUNDED) + == + ((h->non_empty_free_elt_heads[i / + BITS (uword)] & ((uword) 1 << + (uword) (i % + BITS + (uword)))) + != 0)); + + if (h->first_free_elt_uoffset_by_bin[i] == MHEAP_GROUNDED) + continue; + + e = mheap_elt_at_uoffset (v, h->first_free_elt_uoffset_by_bin[i]); + is_first = 1; + while (1) + { + uword s; + + n = mheap_next_elt (e); + + /* Object must be marked free. */ + CHECK (e->is_free); + + /* Next object's previous free bit must also be set. */ + CHECK (n->prev_is_free); + + if (is_first) + CHECK (e->free_elt.prev_uoffset == MHEAP_GROUNDED); + is_first = 0; + + s = mheap_elt_data_bytes (e); + CHECK (user_data_size_to_bin_index (s) == i); + + free_count_from_free_lists += 1; + free_size_from_free_lists += s; + + if (e->free_elt.next_uoffset == MHEAP_GROUNDED) + break; + + n = mheap_elt_at_uoffset (v, e->free_elt.next_uoffset); + + /* Check free element linkages. */ + CHECK (n->free_elt.prev_uoffset == mheap_elt_uoffset (v, e)); + + e = n; + } + } + + /* Go through small object cache. */ + small_elt_free_count = small_elt_free_size = 0; + for (i = 0; i < ARRAY_LEN (h->small_object_cache.bins.as_u8); i++) + { + if (h->small_object_cache.bins.as_u8[i] != 0) + { + mheap_elt_t *e; + uword b = h->small_object_cache.bins.as_u8[i] - 1; + uword o = h->small_object_cache.offsets[i]; + uword s; + + e = mheap_elt_at_uoffset (v, o); + + /* Object must be allocated. */ + CHECK (!e->is_free); + + s = mheap_elt_data_bytes (e); + CHECK (user_data_size_to_bin_index (s) == b); + + small_elt_free_count += 1; + small_elt_free_size += s; + } + } + + { + mheap_elt_t *e, *n; + uword elt_free_size, elt_free_count; + + elt_count = elt_size = elt_free_size = elt_free_count = 0; + for (e = v; e->n_user_data != MHEAP_N_USER_DATA_INVALID; e = n) + { + if (e->prev_n_user_data != MHEAP_N_USER_DATA_INVALID) + CHECK (e->prev_n_user_data * sizeof (e->user_data[0]) >= + MHEAP_MIN_USER_DATA_BYTES); + + CHECK (e->n_user_data * sizeof (e->user_data[0]) >= + MHEAP_MIN_USER_DATA_BYTES); + + n = mheap_next_elt (e); + + CHECK (e->is_free == n->prev_is_free); + + elt_count++; + s = mheap_elt_data_bytes (e); + elt_size += s; + + if (e->is_free) + { + elt_free_count++; + elt_free_size += s; + } + + /* Consecutive free objects should have been combined. */ + CHECK (!(e->prev_is_free && n->prev_is_free)); + } + + CHECK (free_count_from_free_lists == elt_free_count); + CHECK (free_size_from_free_lists == elt_free_size); + CHECK (elt_count == h->n_elts + elt_free_count + small_elt_free_count); + CHECK (elt_size + (elt_count + 1) * MHEAP_ELT_OVERHEAD_BYTES == + vec_len (v)); + } + + { + mheap_elt_t *e, *n; + + for (e = v; e->n_user_data == MHEAP_N_USER_DATA_INVALID; e = n) + { + n = mheap_next_elt (e); + CHECK (e->n_user_data == n->prev_n_user_data); + } + } + +#undef CHECK + + mheap_maybe_unlock (v); + + h->validate_serial += 1; +} + +static void +mheap_get_trace (void *v, uword offset, uword size) +{ + mheap_t *h; + mheap_trace_main_t *tm; + mheap_trace_t *t; + uword i, n_callers, trace_index, *p; + mheap_trace_t trace; + + /* Spurious Coverity warnings be gone. */ + memset (&trace, 0, sizeof (trace)); + + n_callers = clib_backtrace (trace.callers, ARRAY_LEN (trace.callers), + /* Skip mheap_get_aligned's frame */ 1); + if (n_callers == 0) + return; + + for (i = n_callers; i < ARRAY_LEN (trace.callers); i++) + trace.callers[i] = 0; + + h = mheap_header (v); + tm = &h->trace_main; + + if (!tm->trace_by_callers) + tm->trace_by_callers = + hash_create_mem (0, sizeof (trace.callers), sizeof (uword)); + + p = hash_get_mem (tm->trace_by_callers, &trace.callers); + if (p) + { + trace_index = p[0]; + t = tm->traces + trace_index; + } + else + { + i = vec_len (tm->trace_free_list); + if (i > 0) + { + trace_index = tm->trace_free_list[i - 1]; + _vec_len (tm->trace_free_list) = i - 1; + } + else + { + mheap_trace_t *old_start = tm->traces; + mheap_trace_t *old_end = vec_end (tm->traces); + + vec_add2 (tm->traces, t, 1); + + if (tm->traces != old_start) + { + hash_pair_t *p; + mheap_trace_t *q; + /* *INDENT-OFF* */ + hash_foreach_pair (p, tm->trace_by_callers, + ({ + q = uword_to_pointer (p->key, mheap_trace_t *); + ASSERT (q >= old_start && q < old_end); + p->key = pointer_to_uword (tm->traces + (q - old_start)); + })); + /* *INDENT-ON* */ + } + trace_index = t - tm->traces; + } + + t = tm->traces + trace_index; + t[0] = trace; + t->n_allocations = 0; + t->n_bytes = 0; + hash_set_mem (tm->trace_by_callers, t->callers, trace_index); + } + + t->n_allocations += 1; + t->n_bytes += size; + t->offset = offset; /* keep a sample to autopsy */ + hash_set (tm->trace_index_by_offset, offset, t - tm->traces); +} + +static void +mheap_put_trace (void *v, uword offset, uword size) +{ + mheap_t *h; + mheap_trace_main_t *tm; + mheap_trace_t *t; + uword trace_index, *p; + + h = mheap_header (v); + tm = &h->trace_main; + p = hash_get (tm->trace_index_by_offset, offset); + if (!p) + return; + + trace_index = p[0]; + hash_unset (tm->trace_index_by_offset, offset); + ASSERT (trace_index < vec_len (tm->traces)); + + t = tm->traces + trace_index; + ASSERT (t->n_allocations > 0); + ASSERT (t->n_bytes >= size); + t->n_allocations -= 1; + t->n_bytes -= size; + if (t->n_allocations == 0) + { + hash_unset_mem (tm->trace_by_callers, t->callers); + vec_add1 (tm->trace_free_list, trace_index); + memset (t, 0, sizeof (t[0])); + } +} + +static int +mheap_trace_sort (const void *_t1, const void *_t2) +{ + const mheap_trace_t *t1 = _t1; + const mheap_trace_t *t2 = _t2; + word cmp; + + cmp = (word) t2->n_bytes - (word) t1->n_bytes; + if (!cmp) + cmp = (word) t2->n_allocations - (word) t1->n_allocations; + return cmp; +} + +always_inline void +mheap_trace_main_free (mheap_trace_main_t * tm) +{ + vec_free (tm->traces); + vec_free (tm->trace_free_list); + hash_free (tm->trace_by_callers); + hash_free (tm->trace_index_by_offset); +} + +void +mheap_trace (void *v, int enable) +{ + mheap_t *h; + + h = mheap_header (v); + + if (enable) + { + h->flags |= MHEAP_FLAG_TRACE; + } + else + { + mheap_trace_main_free (&h->trace_main); + h->flags &= ~MHEAP_FLAG_TRACE; + } +} + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ |