1 files changed, 159 insertions, 0 deletions
diff --git a/memory/mozalloc/mozalloc.cpp b/memory/mozalloc/mozalloc.cpp
new file mode 100644
index 0000000000..aef8ab943a
--- /dev/null
+++ b/memory/mozalloc/mozalloc.cpp
@@ -0,0 +1,159 @@
+/* -*- 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
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#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
+}