From 077c63084488ac38c1c44e8cdaa9c33086f0a649 Mon Sep 17 00:00:00 2001
From: wolfbeast <mcwerewolf@gmail.com>
Date: Fri, 27 Apr 2018 13:56:47 +0200
Subject: Remove support for making jemalloc4 the default memory allocator.

---
 memory/build/jemalloc_config.cpp | 150 ---------------------------------------
 1 file changed, 150 deletions(-)

(limited to 'memory/build/jemalloc_config.cpp')

diff --git a/memory/build/jemalloc_config.cpp b/memory/build/jemalloc_config.cpp
index 1a83c79e2..0b734d804 100644
--- a/memory/build/jemalloc_config.cpp
+++ b/memory/build/jemalloc_config.cpp
@@ -2,157 +2,7 @@
  * 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/. */
 
-#ifdef MOZ_JEMALLOC4
-
-#define MOZ_JEMALLOC_IMPL
-
-/* mozmemory_wrap.h needs to be included before MFBT headers */
-#include "mozmemory_wrap.h"
-#include <mozilla/Assertions.h>
-#include "mozilla/Types.h"
-
-#define DLLEXPORT
-#include "jemalloc/jemalloc.h"
-
-#ifdef XP_WIN
-#include <windows.h>
-#endif
-#ifdef XP_DARWIN
-#include <sys/mman.h>
-#endif
-
-/* Override some jemalloc defaults */
-#ifdef DEBUG
-#define MOZ_MALLOC_BUILD_OPTIONS ",junk:true"
-#else
-#define MOZ_MALLOC_BUILD_OPTIONS ",junk:free"
-#endif
-
-#define MOZ_MALLOC_OPTIONS "narenas:1,tcache:false"
-MFBT_DATA const char* je_(malloc_conf) =
-  MOZ_MALLOC_OPTIONS MOZ_MALLOC_BUILD_OPTIONS;
-
-#ifdef ANDROID
-#include <android/log.h>
-
-static void
-_je_malloc_message(void* cbopaque, const char* s)
-{
-  __android_log_print(ANDROID_LOG_INFO, "GeckoJemalloc", "%s", s);
-}
-
-void (*je_(malloc_message))(void*, const char* s) = _je_malloc_message;
-#endif
-
-/* Jemalloc supports hooks that are called on chunk
- * allocate/deallocate/commit/decommit/purge/etc.
- *
- * We currently only hook commit, decommit and purge. We do this to tweak
- * the way chunks are handled so that RSS stays lower than it normally
- * would with the default jemalloc uses.
- * This somewhat matches the behavior of mozjemalloc, except it doesn't
- * rely on a double purge on mac, instead purging directly. (Yes, this
- * means we can get rid of jemalloc_purge_freed_pages at some point)
- *
- * The default for jemalloc is to do the following:
- * - commit, decommit: nothing
- * - purge: MEM_RESET on Windows, MADV_FREE on Mac/BSD, MADV_DONTNEED on Linux
- *
- * The hooks we setup do the following:
- * on Windows:
- * - commit: MEM_COMMIT
- * - decommit: MEM_DECOMMIT
- * on Mac:
- * - purge: mmap new anonymous memory on top of the chunk
- *
- * We only set the above hooks, others are left with the default.
- */
-#if defined(XP_WIN) || defined(XP_DARWIN)
-class JemallocInit {
-public:
-  JemallocInit()
-  {
-    chunk_hooks_t hooks;
-    size_t hooks_len;
-    unsigned narenas;
-    size_t mib[3];
-    size_t size;
-
-    size = sizeof(narenas);
-    je_(mallctl)("arenas.narenas", &narenas, &size, nullptr, 0);
-
-    size = sizeof(mib) / sizeof(mib[0]);
-    je_(mallctlnametomib)("arena.0.chunk_hooks", mib, &size);
-
-    /* Set the hooks on all the existing arenas. */
-    for (unsigned arena = 0; arena < narenas; arena++) {
-      mib[1] = arena;
-      hooks_len = sizeof(hooks);
-      je_(mallctlbymib)(mib, size, &hooks, &hooks_len, nullptr, 0);
-
-#ifdef XP_WIN
-      hooks.commit = CommitHook;
-      hooks.decommit = DecommitHook;
-#endif
-#ifdef XP_DARWIN
-      hooks.purge = PurgeHook;
-#endif
-
-      je_(mallctlbymib)(mib, size, nullptr, nullptr, &hooks, hooks_len);
-    }
-  }
-
-private:
-#ifdef XP_WIN
-  static bool
-  CommitHook(void* chunk, size_t size, size_t offset, size_t length,
-             unsigned arena_ind)
-  {
-    void* addr = reinterpret_cast<void*>(
-      reinterpret_cast<uintptr_t>(chunk) + static_cast<uintptr_t>(offset));
-
-    if (!VirtualAlloc(addr, length, MEM_COMMIT, PAGE_READWRITE))
-      return true;
-
-    return false;
-  }
-
-  static bool
-  DecommitHook(void* chunk, size_t size, size_t offset, size_t length,
-               unsigned arena_ind)
-  {
-    void* addr = reinterpret_cast<void*>(
-      reinterpret_cast<uintptr_t>(chunk) + static_cast<uintptr_t>(offset));
-
-    if (!VirtualFree(addr, length, MEM_DECOMMIT))
-      MOZ_CRASH();
-
-    return false;
-  }
-#endif
-
-#ifdef XP_DARWIN
-  static bool
-  PurgeHook(void* chunk, size_t size, size_t offset, size_t length,
-            unsigned arena_ind)
-  {
-    void* addr = reinterpret_cast<void*>(
-      reinterpret_cast<uintptr_t>(chunk) + static_cast<uintptr_t>(offset));
-
-    void* new_addr = mmap(addr, length, PROT_READ | PROT_WRITE,
-                          MAP_FIXED | MAP_PRIVATE | MAP_ANON, -1, 0);
-    return (new_addr != addr);
-  }
-#endif
-};
-
-/* For the static constructor from the class above */
-JemallocInit gJemallocInit;
-#endif
-
-#else
 #include <mozilla/Assertions.h>
-#endif /* MOZ_JEMALLOC4 */
 
 /* Provide an abort function for use in jemalloc code */
 extern "C" void moz_abort() {
-- 
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