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When HAVE_MALLOC_SIZE is false, each call to zrealloc causes used_memory to increase by PREFIX_SIZE more than it should, due to mis-matched accounting between the original zmalloc (which includes PREFIX size in its increment) and zrealloc (which misses it from its decrement). I've also supplied a command-line test to easily demonstrate the problem. It's not wired into the test framework, because I don't know TCL so I'm not sure how to automate it.
111 lines
4.0 KiB
C
111 lines
4.0 KiB
C
/* zmalloc - total amount of allocated memory aware version of malloc()
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*
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* Copyright (c) 2009-2010, Salvatore Sanfilippo <antirez at gmail dot com>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* * Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* * Neither the name of Redis nor the names of its contributors may be used
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* to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef __ZMALLOC_H
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#define __ZMALLOC_H
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/* Double expansion needed for stringification of macro values. */
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#define __xstr(s) __str(s)
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#define __str(s) #s
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#if defined(USE_TCMALLOC)
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#define ZMALLOC_LIB ("tcmalloc-" __xstr(TC_VERSION_MAJOR) "." __xstr(TC_VERSION_MINOR))
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#include <google/tcmalloc.h>
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#if (TC_VERSION_MAJOR == 1 && TC_VERSION_MINOR >= 6) || (TC_VERSION_MAJOR > 1)
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#define HAVE_MALLOC_SIZE 1
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#define zmalloc_size(p) tc_malloc_size(p)
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#else
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#error "Newer version of tcmalloc required"
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#endif
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#elif defined(USE_JEMALLOC)
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#define ZMALLOC_LIB ("jemalloc-" __xstr(JEMALLOC_VERSION_MAJOR) "." __xstr(JEMALLOC_VERSION_MINOR) "." __xstr(JEMALLOC_VERSION_BUGFIX))
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#include <jemalloc/jemalloc.h>
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#if (JEMALLOC_VERSION_MAJOR == 2 && JEMALLOC_VERSION_MINOR >= 1) || (JEMALLOC_VERSION_MAJOR > 2)
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#define HAVE_MALLOC_SIZE 1
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#define zmalloc_size(p) je_malloc_usable_size(p)
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#else
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#error "Newer version of jemalloc required"
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#endif
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#elif defined(__APPLE__)
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#include <malloc/malloc.h>
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#define HAVE_MALLOC_SIZE 1
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#define zmalloc_size(p) malloc_size(p)
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#endif
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#ifndef ZMALLOC_LIB
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#define ZMALLOC_LIB "libc"
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#ifdef __GLIBC__
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#include <malloc.h>
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#define HAVE_MALLOC_SIZE 1
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#define zmalloc_size(p) malloc_usable_size(p)
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#endif
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#endif
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/* We can enable the Redis defrag capabilities only if we are using Jemalloc
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* and the version used is our special version modified for Redis having
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* the ability to return per-allocation fragmentation hints. */
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#if defined(USE_JEMALLOC) && defined(JEMALLOC_FRAG_HINT)
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#define HAVE_DEFRAG
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#endif
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void *zmalloc(size_t size);
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void *zcalloc(size_t size);
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void *zrealloc(void *ptr, size_t size);
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void zfree(void *ptr);
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char *zstrdup(const char *s);
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size_t zmalloc_used_memory(void);
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void zmalloc_set_oom_handler(void (*oom_handler)(size_t));
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size_t zmalloc_get_rss(void);
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int zmalloc_get_allocator_info(size_t *allocated, size_t *active, size_t *resident);
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size_t zmalloc_get_private_dirty(long pid);
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size_t zmalloc_get_smap_bytes_by_field(char *field, long pid);
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size_t zmalloc_get_memory_size(void);
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void zlibc_free(void *ptr);
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#ifdef HAVE_DEFRAG
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void zfree_no_tcache(void *ptr);
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void *zmalloc_no_tcache(size_t size);
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#endif
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#ifndef HAVE_MALLOC_SIZE
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size_t zmalloc_size(void *ptr);
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size_t zmalloc_usable(void *ptr);
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#else
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#define zmalloc_usable(p) zmalloc_size(p)
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#endif
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#ifdef REDIS_TEST
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int zmalloc_test(int argc, char **argv);
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#endif
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#endif /* __ZMALLOC_H */
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