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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* vim: sw=2 ts=4 et :
*/
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
#include <stddef.h> // for size_t
#if defined(MALLOC_H)
# include MALLOC_H // for memalign, malloc_size, malloc_us
#endif // if defined(MALLOC_H)
#if !defined(MOZ_MEMORY)
// When jemalloc is disabled, or when building the static runtime variant,
// we need not to use the suffixes.
# include <stdlib.h> // for malloc, free
# if defined(XP_UNIX)
# include <unistd.h>
# endif // if defined(XP_UNIX)
# define malloc_impl malloc
# define calloc_impl calloc
# define realloc_impl realloc
# define free_impl free
# define memalign_impl memalign
# define malloc_usable_size_impl malloc_usable_size
# define strdup_impl strdup
# define strndup_impl strndup
#endif
#include <errno.h>
#include <new> // for std::bad_alloc
#include <cstring>
#include <sys/types.h>
#include "mozilla/Assertions.h"
#include "mozilla/CheckedInt.h"
#include "mozilla/Likely.h"
#include "mozilla/mozalloc.h"
#include "mozilla/mozalloc_oom.h" // for mozalloc_handle_oom
#if defined(MOZ_MEMORY)
MOZ_MEMORY_API char* strdup_impl(const char*);
MOZ_MEMORY_API char* strndup_impl(const char*, size_t);
#endif
void* moz_xmalloc(size_t size) {
void* ptr = malloc_impl(size);
if (MOZ_UNLIKELY(!ptr && size)) {
mozalloc_handle_oom(size);
return moz_xmalloc(size);
}
return ptr;
}
void* moz_xcalloc(size_t nmemb, size_t size) {
void* ptr = calloc_impl(nmemb, size);
if (MOZ_UNLIKELY(!ptr && nmemb && size)) {
mozilla::CheckedInt<size_t> totalSize =
mozilla::CheckedInt<size_t>(nmemb) * size;
mozalloc_handle_oom(totalSize.isValid() ? totalSize.value() : SIZE_MAX);
return moz_xcalloc(nmemb, size);
}
return ptr;
}
void* moz_xrealloc(void* ptr, size_t size) {
void* newptr = realloc_impl(ptr, size);
if (MOZ_UNLIKELY(!newptr && size)) {
mozalloc_handle_oom(size);
return moz_xrealloc(ptr, size);
}
return newptr;
}
char* moz_xstrdup(const char* str) {
char* dup = strdup_impl(str);
if (MOZ_UNLIKELY(!dup)) {
mozalloc_handle_oom(0);
return moz_xstrdup(str);
}
return dup;
}
#if defined(HAVE_STRNDUP)
char* moz_xstrndup(const char* str, size_t strsize) {
char* dup = strndup_impl(str, strsize);
if (MOZ_UNLIKELY(!dup)) {
mozalloc_handle_oom(strsize);
return moz_xstrndup(str, strsize);
}
return dup;
}
#endif // if defined(HAVE_STRNDUP)
void* moz_xmemdup(const void* ptr, size_t size) {
void* newPtr = moz_xmalloc(size);
memcpy(newPtr, ptr, size);
return newPtr;
}
#ifndef __wasm__
# ifndef HAVE_MEMALIGN
// We always have a definition of memalign, but system headers don't
// necessarily come with a declaration.
extern "C" void* memalign(size_t, size_t);
# endif
void* moz_xmemalign(size_t boundary, size_t size) {
void* ptr = memalign_impl(boundary, size);
if (MOZ_UNLIKELY(!ptr && EINVAL != errno)) {
mozalloc_handle_oom(size);
return moz_xmemalign(boundary, size);
}
// non-NULL ptr or errno == EINVAL
return ptr;
}
#endif
size_t moz_malloc_usable_size(void* ptr) {
if (!ptr) return 0;
#if defined(XP_DARWIN)
return malloc_size(ptr);
#elif defined(HAVE_MALLOC_USABLE_SIZE) || defined(MOZ_MEMORY)
return malloc_usable_size_impl(ptr);
#elif defined(XP_WIN)
return _msize(ptr);
#else
return 0;
#endif
}
size_t moz_malloc_size_of(const void* ptr) {
return moz_malloc_usable_size((void*)ptr);
}
#if defined(MOZ_MEMORY)
# include "mozjemalloc_types.h"
// mozmemory.h declares jemalloc_ptr_info(), but including that header in this
// file is complicated. So we just redeclare it here instead, and include
// mozjemalloc_types.h for jemalloc_ptr_info_t.
MOZ_JEMALLOC_API void jemalloc_ptr_info(const void* ptr,
jemalloc_ptr_info_t* info);
#endif
size_t moz_malloc_enclosing_size_of(const void* ptr) {
#if defined(MOZ_MEMORY)
jemalloc_ptr_info_t info;
jemalloc_ptr_info(ptr, &info);
return jemalloc_ptr_is_live(&info) ? info.size : 0;
#else
return 0;
#endif
}