diff --git a/libc/bionic/malloc_common.cpp b/libc/bionic/malloc_common.cpp
new file mode 100644
index 0000000..56f1c10
--- /dev/null
+++ b/libc/bionic/malloc_common.cpp
@@ -0,0 +1,387 @@
+/*
+ * Copyright (C) 2009 The Android Open Source Project
+ * 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.
+ *
+ * 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.
+ */
+
+// Contains a thin layer that calls whatever real native allocator
+// has been defined. For the libc shared library, this allows the
+// implementation of a debug malloc that can intercept all of the allocation
+// calls and add special debugging code to attempt to catch allocation
+// errors. All of the debugging code is implemented in a separate shared
+// library that is only loaded when the property "libc.debug.malloc.options"
+// is set to a non-zero value. There are two functions exported to
+// allow ddms, or other external users to get information from the debug
+// allocation.
+//   get_malloc_leak_info: Returns information about all of the known native
+//                         allocations that are currently in use.
+//   free_malloc_leak_info: Frees the data allocated by the call to
+//                          get_malloc_leak_info.
+
+#include <private/bionic_config.h>
+#include <private/bionic_globals.h>
+#include <private/bionic_malloc_dispatch.h>
+
+#include "jemalloc.h"
+#define Malloc(function)  je_ ## function
+
+static constexpr MallocDispatch __libc_malloc_default_dispatch
+  __attribute__((unused)) = {
+    Malloc(calloc),
+    Malloc(free),
+    Malloc(mallinfo),
+    Malloc(malloc),
+    Malloc(malloc_usable_size),
+    Malloc(memalign),
+    Malloc(posix_memalign),
+#if defined(HAVE_DEPRECATED_MALLOC_FUNCS)
+    Malloc(pvalloc),
+#endif
+    Malloc(realloc),
+#if defined(HAVE_DEPRECATED_MALLOC_FUNCS)
+    Malloc(valloc),
+#endif
+  };
+
+// In a VM process, this is set to 1 after fork()ing out of zygote.
+int gMallocLeakZygoteChild = 0;
+
+// =============================================================================
+// Allocation functions
+// =============================================================================
+extern "C" void* calloc(size_t n_elements, size_t elem_size) {
+  auto _calloc = __libc_globals->malloc_dispatch.calloc;
+  if (__predict_false(_calloc != nullptr)) {
+    return _calloc(n_elements, elem_size);
+  }
+  return Malloc(calloc)(n_elements, elem_size);
+}
+
+extern "C" void free(void* mem) {
+  auto _free = __libc_globals->malloc_dispatch.free;
+  if (__predict_false(_free != nullptr)) {
+    _free(mem);
+  } else {
+    Malloc(free)(mem);
+  }
+}
+
+extern "C" struct mallinfo mallinfo() {
+  auto _mallinfo = __libc_globals->malloc_dispatch.mallinfo;
+  if (__predict_false(_mallinfo != nullptr)) {
+    return _mallinfo();
+  }
+  return Malloc(mallinfo)();
+}
+
+extern "C" void* malloc(size_t bytes) {
+  auto _malloc = __libc_globals->malloc_dispatch.malloc;
+  if (__predict_false(_malloc != nullptr)) {
+    return _malloc(bytes);
+  }
+  return Malloc(malloc)(bytes);
+}
+
+extern "C" size_t malloc_usable_size(const void* mem) {
+  auto _malloc_usable_size = __libc_globals->malloc_dispatch.malloc_usable_size;
+  if (__predict_false(_malloc_usable_size != nullptr)) {
+    return _malloc_usable_size(mem);
+  }
+  return Malloc(malloc_usable_size)(mem);
+}
+
+extern "C" void* memalign(size_t alignment, size_t bytes) {
+  auto _memalign = __libc_globals->malloc_dispatch.memalign;
+  if (__predict_false(_memalign != nullptr)) {
+    return _memalign(alignment, bytes);
+  }
+  return Malloc(memalign)(alignment, bytes);
+}
+
+extern "C" int posix_memalign(void** memptr, size_t alignment, size_t size) {
+  auto _posix_memalign = __libc_globals->malloc_dispatch.posix_memalign;
+  if (__predict_false(_posix_memalign != nullptr)) {
+    return _posix_memalign(memptr, alignment, size);
+  }
+  return Malloc(posix_memalign)(memptr, alignment, size);
+}
+
+extern "C" void* realloc(void* old_mem, size_t bytes) {
+  auto _realloc = __libc_globals->malloc_dispatch.realloc;
+  if (__predict_false(_realloc != nullptr)) {
+    return _realloc(old_mem, bytes);
+  }
+  return Malloc(realloc)(old_mem, bytes);
+}
+
+#if defined(HAVE_DEPRECATED_MALLOC_FUNCS)
+extern "C" void* pvalloc(size_t bytes) {
+  auto _pvalloc = __libc_globals->malloc_dispatch.pvalloc;
+  if (__predict_false(_pvalloc != nullptr)) {
+    return _pvalloc(bytes);
+  }
+  return Malloc(pvalloc)(bytes);
+}
+
+extern "C" void* valloc(size_t bytes) {
+  auto _valloc = __libc_globals->malloc_dispatch.valloc;
+  if (__predict_false(_valloc != nullptr)) {
+    return _valloc(bytes);
+  }
+  return Malloc(valloc)(bytes);
+}
+#endif
+
+// We implement malloc debugging only in libc.so, so the code below
+// must be excluded if we compile this file for static libc.a
+#if !defined(LIBC_STATIC)
+
+#include <dlfcn.h>
+#include <pthread.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include <private/libc_logging.h>
+#include <sys/system_properties.h>
+
+extern "C" int __cxa_atexit(void (*func)(void *), void *arg, void *dso);
+
+static const char* DEBUG_SHARED_LIB = "libc_malloc_debug.so";
+static const char* DEBUG_MALLOC_PROPERTY_OPTIONS = "libc.debug.malloc.options";
+static const char* DEBUG_MALLOC_PROPERTY_PROGRAM = "libc.debug.malloc.program";
+static const char* DEBUG_MALLOC_PROPERTY_ENV_ENABLED = "libc.debug.malloc.env_enabled";
+static const char* DEBUG_MALLOC_ENV_ENABLE = "LIBC_DEBUG_MALLOC_ENABLE";
+
+static void* libc_malloc_impl_handle = nullptr;
+
+static void (*g_debug_finalize_func)();
+static void (*g_debug_get_malloc_leak_info_func)(uint8_t**, size_t*, size_t*, size_t*, size_t*);
+static void (*g_debug_free_malloc_leak_info_func)(uint8_t*);
+
+// =============================================================================
+// Log functions
+// =============================================================================
+#define error_log(format, ...)  \
+    __libc_format_log(ANDROID_LOG_ERROR, "libc", (format), ##__VA_ARGS__ )
+#define info_log(format, ...)  \
+    __libc_format_log(ANDROID_LOG_INFO, "libc", (format), ##__VA_ARGS__ )
+// =============================================================================
+
+// =============================================================================
+// Exported for use by ddms.
+// =============================================================================
+
+// Retrieve native heap information.
+//
+// "*info" is set to a buffer we allocate
+// "*overall_size" is set to the size of the "info" buffer
+// "*info_size" is set to the size of a single entry
+// "*total_memory" is set to the sum of all allocations we're tracking; does
+//   not include heap overhead
+// "*backtrace_size" is set to the maximum number of entries in the back trace
+extern "C" void get_malloc_leak_info(uint8_t** info, size_t* overall_size,
+    size_t* info_size, size_t* total_memory, size_t* backtrace_size) {
+  if (g_debug_get_malloc_leak_info_func == nullptr) {
+    return;
+  }
+  g_debug_get_malloc_leak_info_func(info, overall_size, info_size, total_memory, backtrace_size);
+}
+
+extern "C" void free_malloc_leak_info(uint8_t* info) {
+  if (g_debug_free_malloc_leak_info_func == nullptr) {
+    return;
+  }
+  g_debug_free_malloc_leak_info_func(info);
+}
+// =============================================================================
+
+template<typename FunctionType>
+static bool InitMallocFunction(void* malloc_impl_handler, FunctionType* func, const char* prefix, const char* suffix) {
+  char symbol[128];
+  snprintf(symbol, sizeof(symbol), "%s_%s", prefix, suffix);
+  *func = reinterpret_cast<FunctionType>(dlsym(malloc_impl_handler, symbol));
+  if (*func == nullptr) {
+    error_log("%s: dlsym(\"%s\") failed", getprogname(), symbol);
+    return false;
+  }
+  return true;
+}
+
+static bool InitMalloc(void* malloc_impl_handler, MallocDispatch* table, const char* prefix) {
+  if (!InitMallocFunction<MallocCalloc>(malloc_impl_handler, &table->calloc,
+                                        prefix, "calloc")) {
+    return false;
+  }
+  if (!InitMallocFunction<MallocFree>(malloc_impl_handler, &table->free,
+                                      prefix, "free")) {
+    return false;
+  }
+  if (!InitMallocFunction<MallocMallinfo>(malloc_impl_handler, &table->mallinfo,
+                                          prefix, "mallinfo")) {
+    return false;
+  }
+  if (!InitMallocFunction<MallocMalloc>(malloc_impl_handler, &table->malloc,
+                                        prefix, "malloc")) {
+    return false;
+  }
+  if (!InitMallocFunction<MallocMallocUsableSize>(
+      malloc_impl_handler, &table->malloc_usable_size, prefix, "malloc_usable_size")) {
+    return false;
+  }
+  if (!InitMallocFunction<MallocMemalign>(malloc_impl_handler, &table->memalign,
+                                          prefix, "memalign")) {
+    return false;
+  }
+  if (!InitMallocFunction<MallocPosixMemalign>(malloc_impl_handler, &table->posix_memalign,
+                                               prefix, "posix_memalign")) {
+    return false;
+  }
+  if (!InitMallocFunction<MallocRealloc>(malloc_impl_handler, &table->realloc,
+                                         prefix, "realloc")) {
+    return false;
+  }
+#if defined(HAVE_DEPRECATED_MALLOC_FUNCS)
+  if (!InitMallocFunction<MallocPvalloc>(malloc_impl_handler, &table->pvalloc,
+                                         prefix, "pvalloc")) {
+    return false;
+  }
+  if (!InitMallocFunction<MallocValloc>(malloc_impl_handler, &table->valloc,
+                                        prefix, "valloc")) {
+    return false;
+  }
+#endif
+
+  return true;
+}
+
+static void malloc_fini_impl(void*) {
+  // Our BSD stdio implementation doesn't close the standard streams,
+  // it only flushes them. Other unclosed FILE*s will show up as
+  // malloc leaks, but to avoid the standard streams showing up in
+  // leak reports, close them here.
+  fclose(stdin);
+  fclose(stdout);
+  fclose(stderr);
+
+  g_debug_finalize_func();
+}
+
+// Initializes memory allocation framework once per process.
+static void malloc_init_impl(libc_globals* globals) {
+  char value[PROP_VALUE_MAX];
+  if (__system_property_get(DEBUG_MALLOC_PROPERTY_OPTIONS, value) == 0 || value[0] == '\0') {
+    return;
+  }
+
+  // Check to see if only a specific program should have debug malloc enabled.
+  if (__system_property_get(DEBUG_MALLOC_PROPERTY_PROGRAM, value) != 0 &&
+      strstr(getprogname(), value) == nullptr) {
+    return;
+  }
+
+  // Check for the special environment variable instead.
+  if (__system_property_get(DEBUG_MALLOC_PROPERTY_ENV_ENABLED, value) != 0
+      && value[0] != '\0' && getenv(DEBUG_MALLOC_ENV_ENABLE) == nullptr) {
+    return;
+  }
+
+  // Load the debug malloc shared library.
+  void* malloc_impl_handle = dlopen(DEBUG_SHARED_LIB, RTLD_NOW | RTLD_LOCAL);
+  if (malloc_impl_handle == nullptr) {
+    error_log("%s: Unable to open debug malloc shared library %s: %s",
+              getprogname(), DEBUG_SHARED_LIB, dlerror());
+    return;
+  }
+
+  // Initialize malloc debugging in the loaded module.
+  void* sym = dlsym(malloc_impl_handle, "debug_initialize");
+  auto init_func = reinterpret_cast<bool (*)(const MallocDispatch*, int*)>(sym);
+  if (init_func == nullptr) {
+    error_log("%s: debug_initialize routine not found in %s", getprogname(), DEBUG_SHARED_LIB);
+    dlclose(malloc_impl_handle);
+    return;
+  }
+
+  // Get the syms for the external functions.
+  sym = dlsym(malloc_impl_handle, "debug_finalize");
+  if (sym == nullptr) {
+    error_log("%s: debug_finalize routine not found in %s", getprogname(), DEBUG_SHARED_LIB);
+    dlclose(malloc_impl_handle);
+    return;
+  }
+  g_debug_finalize_func = reinterpret_cast<void (*)()>(sym);
+
+  sym = dlsym(malloc_impl_handle, "debug_get_malloc_leak_info");
+  if (sym == nullptr) {
+    error_log("%s: debug_get_malloc_leak_info routine not found in %s", getprogname(),
+              DEBUG_SHARED_LIB);
+    dlclose(malloc_impl_handle);
+    return;
+  }
+  g_debug_get_malloc_leak_info_func = reinterpret_cast<void (*)(uint8_t**, size_t*, size_t*,
+                                                                size_t*, size_t*)>(sym);
+
+  sym = dlsym(malloc_impl_handle, "debug_free_malloc_leak_info");
+  if (sym == nullptr) {
+    error_log("%s: debug_free_malloc_leak_info routine not found in %s", getprogname(),
+              DEBUG_SHARED_LIB);
+    dlclose(malloc_impl_handle);
+    return;
+  }
+  g_debug_free_malloc_leak_info_func = reinterpret_cast<void (*)(uint8_t*)>(sym);
+
+  if (!init_func(&__libc_malloc_default_dispatch, &gMallocLeakZygoteChild)) {
+    dlclose(malloc_impl_handle);
+    return;
+  }
+
+  MallocDispatch malloc_dispatch_table;
+  if (!InitMalloc(malloc_impl_handle, &malloc_dispatch_table, "debug")) {
+    g_debug_finalize_func();
+    dlclose(malloc_impl_handle);
+    return;
+  }
+
+  globals->malloc_dispatch = malloc_dispatch_table;
+  libc_malloc_impl_handle = malloc_impl_handle;
+
+  info_log("%s: malloc debug enabled", getprogname());
+
+  // Use atexit to trigger the cleanup function. This avoids a problem
+  // where another atexit function is used to cleanup allocated memory,
+  // but the finalize function was already called. This particular error
+  // seems to be triggered by a zygote spawned process calling exit.
+  int ret_value = __cxa_atexit(malloc_fini_impl, nullptr, nullptr);
+  if (ret_value != 0) {
+    error_log("failed to set atexit cleanup function: %d", ret_value);
+  }
+}
+
+// Initializes memory allocation framework.
+// This routine is called from __libc_init routines in libc_init_dynamic.cpp.
+__LIBC_HIDDEN__ void __libc_init_malloc(libc_globals* globals) {
+  malloc_init_impl(globals);
+}
+#endif  // !LIBC_STATIC