1 files changed, 160 insertions, 0 deletions
diff --git a/src/zmalloc.h b/src/zmalloc.h
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+/* zmalloc - total amount of allocated memory aware version of malloc()
+ *
+ * Copyright (c) 2009-2010, Salvatore Sanfilippo <antirez at gmail dot com>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ *   * Redistributions of source code must retain the above copyright notice,
+ *     this list of conditions and the following disclaimer.
+ *   * Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in the
+ *     documentation and/or other materials provided with the distribution.
+ *   * Neither the name of Redis nor the names of its contributors may be used
+ *     to endorse or promote products derived from this software without
+ *     specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef __ZMALLOC_H
+#define __ZMALLOC_H
+
+/* Double expansion needed for stringification of macro values. */
+#define __xstr(s) __str(s)
+#define __str(s) #s
+
+#if defined(USE_TCMALLOC)
+#define ZMALLOC_LIB ("tcmalloc-" __xstr(TC_VERSION_MAJOR) "." __xstr(TC_VERSION_MINOR))
+#include <google/tcmalloc.h>
+#if (TC_VERSION_MAJOR == 1 && TC_VERSION_MINOR >= 6) || (TC_VERSION_MAJOR > 1)
+#define HAVE_MALLOC_SIZE 1
+#define zmalloc_size(p) tc_malloc_size(p)
+#else
+#error "Newer version of tcmalloc required"
+#endif
+
+#elif defined(USE_JEMALLOC)
+#define ZMALLOC_LIB ("jemalloc-" __xstr(JEMALLOC_VERSION_MAJOR) "." __xstr(JEMALLOC_VERSION_MINOR) "." __xstr(JEMALLOC_VERSION_BUGFIX))
+#include <jemalloc/jemalloc.h>
+#if (JEMALLOC_VERSION_MAJOR == 2 && JEMALLOC_VERSION_MINOR >= 1) || (JEMALLOC_VERSION_MAJOR > 2)
+#define HAVE_MALLOC_SIZE 1
+#define zmalloc_size(p) je_malloc_usable_size(p)
+#else
+#error "Newer version of jemalloc required"
+#endif
+
+#elif defined(__APPLE__)
+#include <malloc/malloc.h>
+#define HAVE_MALLOC_SIZE 1
+#define zmalloc_size(p) malloc_size(p)
+#endif
+
+/* On native libc implementations, we should still do our best to provide a
+ * HAVE_MALLOC_SIZE capability. This can be set explicitly as well:
+ *
+ * NO_MALLOC_USABLE_SIZE disables it on all platforms, even if they are
+ *      known to support it.
+ * USE_MALLOC_USABLE_SIZE forces use of malloc_usable_size() regardless
+ *      of platform.
+ */
+#ifndef ZMALLOC_LIB
+#define ZMALLOC_LIB "libc"
+
+#if !defined(NO_MALLOC_USABLE_SIZE) && \
+    (defined(__GLIBC__) || defined(__FreeBSD__) || \
+     defined(USE_MALLOC_USABLE_SIZE))
+
+/* Includes for malloc_usable_size() */
+#ifdef __FreeBSD__
+#include <malloc_np.h>
+#else
+#include <malloc.h>
+#endif
+
+#define HAVE_MALLOC_SIZE 1
+#define zmalloc_size(p) malloc_usable_size(p)
+
+#endif
+#endif
+
+/* We can enable the Redis defrag capabilities only if we are using Jemalloc
+ * and the version used is our special version modified for Redis having
+ * the ability to return per-allocation fragmentation hints. */
+#if defined(USE_JEMALLOC) && defined(JEMALLOC_FRAG_HINT)
+#define HAVE_DEFRAG
+#endif
+
+void *zmalloc(size_t size);
+void *zcalloc(size_t size);
+void *zcalloc_num(size_t num, size_t size);
+void *zrealloc(void *ptr, size_t size);
+void *ztrymalloc(size_t size);
+void *ztrycalloc(size_t size);
+void *ztryrealloc(void *ptr, size_t size);
+void zfree(void *ptr);
+void *zmalloc_usable(size_t size, size_t *usable);
+void *zcalloc_usable(size_t size, size_t *usable);
+void *zrealloc_usable(void *ptr, size_t size, size_t *usable);
+void *ztrymalloc_usable(size_t size, size_t *usable);
+void *ztrycalloc_usable(size_t size, size_t *usable);
+void *ztryrealloc_usable(void *ptr, size_t size, size_t *usable);
+void zfree_usable(void *ptr, size_t *usable);
+char *zstrdup(const char *s);
+size_t zmalloc_used_memory(void);
+void zmalloc_set_oom_handler(void (*oom_handler)(size_t));
+size_t zmalloc_get_rss(void);
+int zmalloc_get_allocator_info(size_t *allocated, size_t *active, size_t *resident);
+void set_jemalloc_bg_thread(int enable);
+int jemalloc_purge();
+size_t zmalloc_get_private_dirty(long pid);
+size_t zmalloc_get_smap_bytes_by_field(char *field, long pid);
+size_t zmalloc_get_memory_size(void);
+void zlibc_free(void *ptr);
+void zmadvise_dontneed(void *ptr);
+
+#ifdef HAVE_DEFRAG
+void zfree_no_tcache(void *ptr);
+void *zmalloc_no_tcache(size_t size);
+#endif
+
+#ifndef HAVE_MALLOC_SIZE
+size_t zmalloc_size(void *ptr);
+size_t zmalloc_usable_size(void *ptr);
+#else
+/* If we use 'zmalloc_usable_size()' to obtain additional available memory size
+ * and manipulate it, we need to call 'extend_to_usable()' afterwards to ensure
+ * the compiler recognizes this extra memory. However, if we use the pointer
+ * obtained from z[*]_usable() family functions, there is no need for this step. */
+#define zmalloc_usable_size(p) zmalloc_size(p)
+
+/* derived from https://github.com/systemd/systemd/pull/25688
+ * We use zmalloc_usable_size() everywhere to use memory blocks, but that is an abuse since the
+ * malloc_usable_size() isn't meant for this kind of use, it is for diagnostics only. That is also why the
+ * behavior is flaky when built with _FORTIFY_SOURCE, the compiler can sense that we reach outside
+ * the allocated block and SIGABRT.
+ * We use a dummy allocator function to tell the compiler that the new size of ptr is newsize.
+ * The implementation returns the pointer as is; the only reason for its existence is as a conduit for the
+ * alloc_size attribute. This cannot be a static inline because gcc then loses the attributes on the function.
+ * See: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96503 */
+__attribute__((alloc_size(2),noinline)) void *extend_to_usable(void *ptr, size_t size);
+#endif
+
+int get_proc_stat_ll(int i, long long *res);
+
+#ifdef REDIS_TEST
+int zmalloc_test(int argc, char **argv, int flags);
+#endif
+
+#endif /* __ZMALLOC_H */