2 * Copyright (c) 2015 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
16 #include <vppinfra/format.h>
17 #include <vppinfra/dlmalloc.h>
18 #include <vppinfra/os.h>
19 #include <vppinfra/lock.h>
20 #include <vppinfra/hash.h>
21 #include <vppinfra/elf_clib.h>
22 #include <vppinfra/sanitizer.h>
26 /* Address of callers: outer first, inner last. */
29 /* Count of allocations with this traceback. */
32 /* Count of bytes allocated with this traceback. */
35 /* Offset of this item */
44 mheap_trace_t *traces;
46 /* Indices of free traces. */
49 /* Hash table mapping callers to trace index. */
50 uword *trace_by_callers;
52 /* Hash table mapping mheap offset to trace index. */
53 uword *trace_index_by_offset;
55 /* So we can easily shut off current segment trace, if any */
56 void *current_traced_mheap;
60 mheap_trace_main_t mheap_trace_main;
63 mheap_get_trace (uword offset, uword size)
65 mheap_trace_main_t *tm = &mheap_trace_main;
67 uword i, n_callers, trace_index, *p;
71 if (tm->enabled == 0 || (clib_mem_get_heap () != tm->current_traced_mheap))
74 /* Spurious Coverity warnings be gone. */
75 clib_memset (&trace, 0, sizeof (trace));
77 /* Skip our frame and mspace_get_aligned's frame */
78 n_callers = clib_backtrace (trace.callers, ARRAY_LEN (trace.callers), 2);
82 clib_spinlock_lock (&tm->lock);
84 /* Turn off tracing to avoid embarrassment... */
85 save_enabled = tm->enabled;
88 if (!tm->trace_by_callers)
89 tm->trace_by_callers =
90 hash_create_shmem (0, sizeof (trace.callers), sizeof (uword));
92 p = hash_get_mem (tm->trace_by_callers, &trace.callers);
96 t = tm->traces + trace_index;
100 i = vec_len (tm->trace_free_list);
103 trace_index = tm->trace_free_list[i - 1];
104 _vec_len (tm->trace_free_list) = i - 1;
108 mheap_trace_t *old_start = tm->traces;
109 mheap_trace_t *old_end = vec_end (tm->traces);
111 vec_add2 (tm->traces, t, 1);
113 if (tm->traces != old_start)
118 hash_foreach_pair (p, tm->trace_by_callers,
120 q = uword_to_pointer (p->key, mheap_trace_t *);
121 ASSERT (q >= old_start && q < old_end);
122 p->key = pointer_to_uword (tm->traces + (q - old_start));
126 trace_index = t - tm->traces;
129 t = tm->traces + trace_index;
131 t->n_allocations = 0;
133 hash_set_mem (tm->trace_by_callers, t->callers, trace_index);
136 t->n_allocations += 1;
138 t->offset = offset; /* keep a sample to autopsy */
139 hash_set (tm->trace_index_by_offset, offset, t - tm->traces);
140 tm->enabled = save_enabled;
141 clib_spinlock_unlock (&tm->lock);
145 mheap_put_trace (uword offset, uword size)
148 uword trace_index, *p;
149 mheap_trace_main_t *tm = &mheap_trace_main;
152 if (tm->enabled == 0)
155 clib_spinlock_lock (&tm->lock);
157 /* Turn off tracing for a moment */
158 save_enabled = tm->enabled;
161 p = hash_get (tm->trace_index_by_offset, offset);
164 tm->enabled = save_enabled;
165 clib_spinlock_unlock (&tm->lock);
170 hash_unset (tm->trace_index_by_offset, offset);
171 ASSERT (trace_index < vec_len (tm->traces));
173 t = tm->traces + trace_index;
174 ASSERT (t->n_allocations > 0);
175 ASSERT (t->n_bytes >= size);
176 t->n_allocations -= 1;
178 if (t->n_allocations == 0)
180 hash_unset_mem (tm->trace_by_callers, t->callers);
181 vec_add1 (tm->trace_free_list, trace_index);
182 clib_memset (t, 0, sizeof (t[0]));
184 tm->enabled = save_enabled;
185 clib_spinlock_unlock (&tm->lock);
189 mheap_trace_main_free (mheap_trace_main_t * tm)
191 vec_free (tm->traces);
192 vec_free (tm->trace_free_list);
193 hash_free (tm->trace_by_callers);
194 hash_free (tm->trace_index_by_offset);
197 /* Initialize CLIB heap based on memory/size given by user.
198 Set memory to 0 and CLIB will try to allocate its own heap. */
200 clib_mem_init_internal (void *memory, uword memory_size,
201 clib_mem_page_sz_t log2_page_sz, int set_heap)
205 clib_mem_main_init ();
209 heap = create_mspace_with_base (memory, memory_size, 1 /* locked */ );
210 mspace_disable_expand (heap);
214 memory_size = round_pow2 (memory_size,
215 clib_mem_page_bytes (log2_page_sz));
216 memory = clib_mem_vm_map_internal (0, log2_page_sz, memory_size, -1, 0,
219 if (memory == CLIB_MEM_VM_MAP_FAILED)
222 heap = create_mspace_with_base (memory, memory_size, 1 /* locked */ );
223 mspace_disable_expand (heap);
226 CLIB_MEM_POISON (mspace_least_addr (heap), mspace_footprint (heap));
229 clib_mem_set_heap (heap);
231 if (mheap_trace_main.lock == 0)
232 clib_spinlock_init (&mheap_trace_main.lock);
238 clib_mem_init (void *memory, uword memory_size)
240 return clib_mem_init_internal (memory, memory_size,
241 CLIB_MEM_PAGE_SZ_DEFAULT,
242 1 /* do clib_mem_set_heap */ );
246 clib_mem_init_with_page_size (uword memory_size,
247 clib_mem_page_sz_t log2_page_sz)
249 return clib_mem_init_internal (0, memory_size, log2_page_sz,
250 1 /* do clib_mem_set_heap */ );
254 clib_mem_init_thread_safe (void *memory, uword memory_size)
256 return clib_mem_init_internal (memory, memory_size,
257 CLIB_MEM_PAGE_SZ_DEFAULT,
258 1 /* do clib_mem_set_heap */ );
262 clib_mem_destroy_mspace (void *mspace)
264 mheap_trace_main_t *tm = &mheap_trace_main;
266 if (tm->enabled && mspace == tm->current_traced_mheap)
269 destroy_mspace (mspace);
273 clib_mem_destroy (void)
275 void *heap = clib_mem_get_heap ();
276 void *base = mspace_least_addr (heap);
277 clib_mem_destroy_mspace (clib_mem_get_heap ());
278 clib_mem_vm_unmap (base);
282 clib_mem_init_thread_safe_numa (void *memory, uword memory_size, u8 numa)
284 clib_mem_vm_alloc_t alloc = { 0 };
288 alloc.size = memory_size;
289 alloc.flags = CLIB_MEM_VM_F_NUMA_FORCE;
290 alloc.numa_node = numa;
291 if ((err = clib_mem_vm_ext_alloc (&alloc)))
293 clib_error_report (err);
297 heap = clib_mem_init_internal (memory, memory_size,
298 CLIB_MEM_PAGE_SZ_DEFAULT,
299 0 /* do NOT clib_mem_set_heap */ );
307 format_clib_mem_usage (u8 * s, va_list * va)
309 int verbose = va_arg (*va, int);
310 return format (s, "$$$$ heap at %llx verbose %d", clib_mem_get_heap (),
315 * Magic decoder ring for mallinfo stats (ala dlmalloc):
317 * size_t arena; / * Non-mmapped space allocated (bytes) * /
318 * size_t ordblks; / * Number of free chunks * /
319 * size_t smblks; / * Number of free fastbin blocks * /
320 * size_t hblks; / * Number of mmapped regions * /
321 * size_t hblkhd; / * Space allocated in mmapped regions (bytes) * /
322 * size_t usmblks; / * Maximum total allocated space (bytes) * /
323 * size_t fsmblks; / * Space in freed fastbin blocks (bytes) * /
324 * size_t uordblks; / * Total allocated space (bytes) * /
325 * size_t fordblks; / * Total free space (bytes) * /
326 * size_t keepcost; / * Top-most, releasable space (bytes) * /
331 format_msize (u8 * s, va_list * va)
333 uword a = va_arg (*va, uword);
336 s = format (s, "%.2fG", (((f64) a) / ((f64) (1ULL << 30))));
337 else if (a >= 1ULL << 20)
338 s = format (s, "%.2fM", (((f64) a) / ((f64) (1ULL << 20))));
339 else if (a >= 1ULL << 10)
340 s = format (s, "%.2fK", (((f64) a) / ((f64) (1ULL << 10))));
342 s = format (s, "%lld", a);
347 mheap_trace_sort (const void *_t1, const void *_t2)
349 const mheap_trace_t *t1 = _t1;
350 const mheap_trace_t *t2 = _t2;
353 cmp = (word) t2->n_bytes - (word) t1->n_bytes;
355 cmp = (word) t2->n_allocations - (word) t1->n_allocations;
360 format_mheap_trace (u8 * s, va_list * va)
362 mheap_trace_main_t *tm = va_arg (*va, mheap_trace_main_t *);
363 int verbose = va_arg (*va, int);
367 clib_spinlock_lock (&tm->lock);
368 if (vec_len (tm->traces) > 0 &&
369 clib_mem_get_heap () == tm->current_traced_mheap)
373 /* Make a copy of traces since we'll be sorting them. */
374 mheap_trace_t *t, *traces_copy;
375 u32 indent, total_objects_traced;
377 traces_copy = vec_dup (tm->traces);
379 qsort (traces_copy, vec_len (traces_copy), sizeof (traces_copy[0]),
382 total_objects_traced = 0;
383 s = format (s, "\n");
384 vec_foreach (t, traces_copy)
386 /* Skip over free elements. */
387 if (t->n_allocations == 0)
390 total_objects_traced += t->n_allocations;
392 /* When not verbose only report allocations of more than 1k. */
393 if (!verbose && t->n_bytes < 1024)
396 if (t == traces_copy)
397 s = format (s, "%=9s%=9s %=10s Traceback\n", "Bytes", "Count",
399 s = format (s, "%9d%9d %p", t->n_bytes, t->n_allocations, t->offset);
400 indent = format_get_indent (s);
401 for (i = 0; i < ARRAY_LEN (t->callers) && t->callers[i]; i++)
404 s = format (s, "%U", format_white_space, indent);
405 #if defined(CLIB_UNIX) && !defined(__APPLE__)
406 /* $$$$ does this actually work? */
408 format (s, " %U\n", format_clib_elf_symbol_with_address,
411 s = format (s, " %p\n", t->callers[i]);
416 s = format (s, "%d total traced objects\n", total_objects_traced);
418 vec_free (traces_copy);
420 clib_spinlock_unlock (&tm->lock);
421 if (have_traces == 0)
422 s = format (s, "no traced allocations\n");
429 format_mheap (u8 * s, va_list * va)
431 void *heap = va_arg (*va, u8 *);
432 int verbose = va_arg (*va, int);
433 struct dlmallinfo mi;
434 mheap_trace_main_t *tm = &mheap_trace_main;
436 mi = mspace_mallinfo (heap);
438 s = format (s, "total: %U, used: %U, free: %U, trimmable: %U",
439 format_msize, mi.arena,
440 format_msize, mi.uordblks,
441 format_msize, mi.fordblks, format_msize, mi.keepcost);
444 s = format (s, "\n free chunks %llu free fastbin blks %llu",
445 mi.ordblks, mi.smblks);
447 format (s, "\n max total allocated %U", format_msize, mi.usmblks);
450 if (mspace_is_traced (heap))
451 s = format (s, "\n%U", format_mheap_trace, tm, verbose);
456 clib_mem_usage (clib_mem_usage_t * u)
458 clib_warning ("unimp");
462 mheap_usage (void *heap, clib_mem_usage_t * usage)
464 struct dlmallinfo mi = mspace_mallinfo (heap);
466 /* TODO: Fill in some more values */
467 usage->object_count = 0;
468 usage->bytes_total = mi.arena;
469 usage->bytes_overhead = 0;
470 usage->bytes_max = 0;
471 usage->bytes_used = mi.uordblks;
472 usage->bytes_free = mi.fordblks;
473 usage->bytes_free_reclaimed = 0;
476 /* Call serial number for debugger breakpoints. */
477 uword clib_mem_validate_serial = 0;
480 clib_mem_validate (void)
482 clib_warning ("unimp");
486 mheap_trace (void *v, int enable)
488 (void) mspace_enable_disable_trace (v, enable);
491 mheap_trace_main_free (&mheap_trace_main);
495 clib_mem_trace (int enable)
497 mheap_trace_main_t *tm = &mheap_trace_main;
498 void *current_heap = clib_mem_get_heap ();
500 tm->enabled = enable;
501 mheap_trace (current_heap, enable);
504 tm->current_traced_mheap = current_heap;
506 tm->current_traced_mheap = 0;
510 clib_mem_is_traced (void)
512 return mspace_is_traced (clib_mem_get_heap ());
516 clib_mem_trace_enable_disable (uword enable)
519 mheap_trace_main_t *tm = &mheap_trace_main;
522 tm->enabled = enable;
527 * These API functions seem like layering violations, but
528 * by introducing them we greatly reduce the number
529 * of code changes required to use dlmalloc spaces
532 mheap_alloc_with_lock (void *memory, uword size, int locked)
536 return create_mspace (size, locked);
539 rv = create_mspace_with_base (memory, size, locked);
541 mspace_disable_expand (rv);
547 * fd.io coding-style-patch-verification: ON
550 * eval: (c-set-style "gnu")