Add m-esr52 at 52.6.0

1 files changed, 219 insertions, 0 deletions

diff --git a/memory/build/mozmemory_wrap.h b/memory/build/mozmemory_wrap.h
new file mode 100644
index 000000000..066d57782
--- /dev/null
+++ b/memory/build/mozmemory_wrap.h
@@ -0,0 +1,219 @@
+/* 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/. */
+
+#ifndef mozmemory_wrap_h
+#define mozmemory_wrap_h
+
+/*
+ * This header contains #defines which tweak the names of various memory
+ * allocation functions.
+ *
+ * There are several types of functions related to memory allocation
+ * that are meant to be used publicly by the Gecko codebase:
+ *
+ * - malloc implementation functions:
+ *   - malloc
+ *   - posix_memalign
+ *   - aligned_alloc
+ *   - calloc
+ *   - realloc
+ *   - free
+ *   - memalign
+ *   - valloc
+ *   - malloc_usable_size
+ *   - malloc_good_size
+ *   Some of these functions are specific to some systems, but for
+ *   convenience, they are treated as being cross-platform, and available
+ *   as such.
+ *
+ * - duplication functions:
+ *   - strndup
+ *   - strdup
+ *   - wcsdup (Windows only)
+ *
+ * - jemalloc specific functions:
+ *   - jemalloc_stats
+ *   - jemalloc_purge_freed_pages
+ *   - jemalloc_free_dirty_pages
+ *   (these functions are native to mozjemalloc, and have compatibility
+ *   implementations for jemalloc3)
+ *
+ * These functions are all exported as part of libmozglue (see
+ * $(topsrcdir)/mozglue/build/Makefile.in), with a few implementation
+ * peculiarities:
+ *
+ * - On Windows, the malloc implementation functions are all prefixed with
+ *   "je_", the duplication functions are prefixed with "wrap_", and jemalloc
+ *   specific functions are left unprefixed. All these functions are however
+ *   aliased when exporting them, such that the resulting mozglue.dll exports
+ *   them unprefixed (see $(topsrcdir)/mozglue/build/mozglue.def.in). The
+ *   prefixed malloc implementation and duplication functions are not
+ *   exported.
+ *
+ * - On MacOSX, the system libc has a zone allocator, which allows us to
+ *   hook custom malloc implementation functions without exporting them.
+ *   The malloc implementation functions are all prefixed with "je_" and used
+ *   this way from the custom zone allocator. They are not exported.
+ *   Duplication functions are not included, since they will call the custom
+ *   zone allocator anyways. Jemalloc-specific functions are also left
+ *   unprefixed.
+ *
+ * - On Android and Gonk, all functions are left unprefixed. Additionally,
+ *   C++ allocation functions (operator new/delete) are also exported and
+ *   unprefixed.
+ *
+ * - On other systems (mostly Linux), all functions are left unprefixed.
+ *
+ * Only Android and Gonk add C++ allocation functions.
+ *
+ * Proper exporting of the various functions is done with the MOZ_MEMORY_API
+ * and MOZ_JEMALLOC_API macros. MOZ_MEMORY_API is meant to be used for malloc
+ * implementation and duplication functions, while MOZ_JEMALLOC_API is
+ * dedicated to jemalloc specific functions.
+ *
+ *
+ * All these functions are meant to be called with no prefix from Gecko code.
+ * In most cases, this is because that's how they are available at runtime.
+ * However, on Android, this relies on faulty.lib (the custom dynamic linker)
+ * resolving mozglue symbols before libc symbols, which is guaranteed by the
+ * way faulty.lib works (it respects the DT_NEEDED order, and libc always
+ * appears after mozglue ; which we double check when building anyways)
+ *
+ *
+ * Within libmozglue (when MOZ_MEMORY_IMPL is defined), all the functions
+ * should be suffixed with "_impl" both for declarations and use.
+ * That is, the implementation declaration for e.g. strdup would look like:
+ *   char* strdup_impl(const char *)
+ * That implementation would call malloc by using "malloc_impl".
+ *
+ * While mozjemalloc uses these "_impl" suffixed helpers, jemalloc3, being
+ * third-party code, doesn't, but instead has an elaborate way to mangle
+ * individual functions. See under "Run jemalloc configure script" in
+ * $(topsrcdir)/configure.in.
+ *
+ *
+ * When building with replace-malloc support, the above still holds, but
+ * the malloc implementation and jemalloc specific functions are the
+ * replace-malloc functions from replace_malloc.c.
+ *
+ * The actual jemalloc/mozjemalloc implementation is prefixed with "je_".
+ *
+ * Thus, when MOZ_REPLACE_MALLOC is defined, the "_impl" suffixed macros
+ * expand to "je_" prefixed function when building mozjemalloc or
+ * jemalloc3/mozjemalloc_compat, where MOZ_JEMALLOC_IMPL is defined.
+ *
+ * In other cases, the "_impl" suffixed macros follow the original scheme,
+ * except on Windows and MacOSX, where they would expand to "je_" prefixed
+ * functions. Instead, they are left unmodified (malloc_impl expands to
+ * malloc_impl).
+ */
+
+#ifndef MOZ_MEMORY
+#  error Should only include mozmemory_wrap.h when MOZ_MEMORY is set.
+#endif
+
+#if defined(MOZ_JEMALLOC_IMPL) && !defined(MOZ_MEMORY_IMPL)
+#  define MOZ_MEMORY_IMPL
+#endif
+#if defined(MOZ_MEMORY_IMPL) && !defined(IMPL_MFBT)
+#  ifdef MFBT_API /* mozilla/Types.h was already included */
+#    error mozmemory_wrap.h has to be included before mozilla/Types.h when MOZ_MEMORY_IMPL is set and IMPL_MFBT is not.
+#  endif
+#  define IMPL_MFBT
+#endif
+
+#include "mozilla/Types.h"
+
+#if !defined(MOZ_SYSTEM_JEMALLOC)
+#  ifdef MOZ_MEMORY_IMPL
+#    if defined(MOZ_JEMALLOC_IMPL) && defined(MOZ_REPLACE_MALLOC) && !defined(MOZ_REPLACE_JEMALLOC)
+#      define mozmem_malloc_impl(a)     je_ ## a
+#      define mozmem_jemalloc_impl(a)   je_ ## a
+#    else
+#      define MOZ_JEMALLOC_API MFBT_API
+#      ifdef MOZ_REPLACE_JEMALLOC
+#        define MOZ_MEMORY_API MFBT_API
+#        define mozmem_malloc_impl(a)     replace_ ## a
+#        define mozmem_jemalloc_impl(a)   replace_ ## a
+#      elif (defined(XP_WIN) || defined(XP_DARWIN))
+#        if defined(MOZ_REPLACE_MALLOC)
+#          define mozmem_malloc_impl(a)   a ## _impl
+#        else
+#          define mozmem_malloc_impl(a)   je_ ## a
+#        endif
+#      else
+#        define MOZ_MEMORY_API MFBT_API
+#        if defined(MOZ_WIDGET_ANDROID) || defined(MOZ_WIDGET_GONK)
+#          define MOZ_WRAP_NEW_DELETE
+#        endif
+#      endif
+#    endif
+#    ifdef XP_WIN
+#      define mozmem_dup_impl(a)      wrap_ ## a
+#    endif
+#  endif
+
+/* All other jemalloc3 functions are prefixed with "je_", except when
+ * building against an unprefixed system jemalloc library */
+#  define je_(a) je_ ## a
+#else /* defined(MOZ_SYSTEM_JEMALLOC) */
+#  define je_(a) a
+#endif
+
+#if !defined(MOZ_MEMORY_IMPL) || defined(MOZ_SYSTEM_JEMALLOC)
+#  define MOZ_MEMORY_API MFBT_API
+#  define MOZ_JEMALLOC_API MFBT_API
+#endif
+
+#ifndef MOZ_MEMORY_API
+#  define MOZ_MEMORY_API
+#endif
+#ifndef MOZ_JEMALLOC_API
+#  define MOZ_JEMALLOC_API
+#endif
+
+#ifndef mozmem_malloc_impl
+#  define mozmem_malloc_impl(a)   a
+#endif
+#ifndef mozmem_dup_impl
+#  define mozmem_dup_impl(a)      a
+#endif
+#ifndef mozmem_jemalloc_impl
+#  define mozmem_jemalloc_impl(a) a
+#endif
+
+/* Malloc implementation functions */
+#define malloc_impl              mozmem_malloc_impl(malloc)
+#define posix_memalign_impl      mozmem_malloc_impl(posix_memalign)
+#define aligned_alloc_impl       mozmem_malloc_impl(aligned_alloc)
+#define calloc_impl              mozmem_malloc_impl(calloc)
+#define realloc_impl             mozmem_malloc_impl(realloc)
+#define free_impl                mozmem_malloc_impl(free)
+#define memalign_impl            mozmem_malloc_impl(memalign)
+#define valloc_impl              mozmem_malloc_impl(valloc)
+#define malloc_usable_size_impl  mozmem_malloc_impl(malloc_usable_size)
+#define malloc_good_size_impl    mozmem_malloc_impl(malloc_good_size)
+
+/* Duplication functions */
+#define strndup_impl   mozmem_dup_impl(strndup)
+#define strdup_impl    mozmem_dup_impl(strdup)
+#ifdef XP_WIN
+#  define wcsdup_impl  mozmem_dup_impl(wcsdup)
+#endif
+
+/* String functions */
+#ifdef ANDROID
+/* Bug 801571 and Bug 879668, libstagefright uses vasprintf, causing malloc()/
+ * free() to be mismatched between bionic and mozglue implementation.
+ */
+#define vasprintf_impl  mozmem_dup_impl(vasprintf)
+#define asprintf_impl   mozmem_dup_impl(asprintf)
+#endif
+
+/* Jemalloc specific function */
+#define jemalloc_stats_impl              mozmem_jemalloc_impl(jemalloc_stats)
+#define jemalloc_purge_freed_pages_impl  mozmem_jemalloc_impl(jemalloc_purge_freed_pages)
+#define jemalloc_free_dirty_pages_impl   mozmem_jemalloc_impl(jemalloc_free_dirty_pages)
+
+#endif /* mozmemory_wrap_h */