Introduce allocator shim for Android

base/allocator/BUILD.gn

 # Copyright (c) 2013 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//build/buildflag_header.gni")
 import("//build/config/allocator.gni")
 import("//build/config/compiler/compiler.gni")
 
 declare_args() {
   # Provide a way to force disable debugallocation in Debug builds,
@@ skipping 249 matching lines @@
     deps += [ "//base/third_party/dynamic_annotations" ]
   }
 }  # use_allocator == "tcmalloc"
 
 buildflag_header("features") {
   header = "features.h"
   flags = [ "USE_EXPERIMENTAL_ALLOCATOR_SHIM=$use_experimental_allocator_shim" ]
 }
 
 if (use_experimental_allocator_shim) {
+  # Used to shim malloc symbols on Android. see //base/allocator/README.md.
+  config("wrap_malloc_symbols") {
+    ldflags = [
+      "-Wl,-wrap,calloc",
+      "-Wl,-wrap,free",
+      "-Wl,-wrap,malloc",
+      "-Wl,-wrap,memalign",
+      "-Wl,-wrap,posix_memalign",
+      "-Wl,-wrap,pvalloc",
+      "-Wl,-wrap,realloc",
+      "-Wl,-wrap,valloc",
+    ]
+  }
+
   source_set("unified_allocator_shim") {
     # TODO(primiano): support other platforms, currently this works only on
-    # Linux/CrOS. http://crbug.com/550886 .
+    # Linux/CrOS/Android. http://crbug.com/550886 .
     configs += [ "//base:base_implementation" ]  # for BASE_EXPORT
     visibility = [ "//base:base" ]
     sources = [
       "allocator_shim.cc",
       "allocator_shim.h",
       "allocator_shim_internals.h",
       "allocator_shim_override_cpp_symbols.h",
       "allocator_shim_override_libc_symbols.h",
     ]
     if (is_linux && use_allocator == "tcmalloc") {
       sources += [
         "allocator_shim_default_dispatch_to_tcmalloc.cc",
         "allocator_shim_override_glibc_weak_symbols.h",
       ]
       deps = [
         ":tcmalloc",
       ]
     } else if (is_linux && use_allocator == "none") {
       sources += [ "allocator_shim_default_dispatch_to_glibc.cc" ]
+    } else if (is_android && use_allocator == "none") {
+      sources += [
+        "allocator_shim_default_dispatch_to_linker_wrapped_symbols.cc",
+        "allocator_shim_override_linker_wrapped_symbols.h",
+      ]
+      all_dependent_configs = [ ":wrap_malloc_symbols" ]
     }
   }
 }