From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Daniel Micay <danielmicay@gmail.com>
Date: Wed, 5 Dec 2018 01:51:56 -0500
Subject: [PATCH] add hardened_malloc library

---
 libc/Android.bp               | 45 ++++++++++++++++++++++++++++-------
 libc/bionic/malloc_common.cpp |  5 ++++
 2 files changed, 41 insertions(+), 9 deletions(-)

diff --git a/libc/Android.bp b/libc/Android.bp
index c339b0451..6b3066e07 100644
--- a/libc/Android.bp
+++ b/libc/Android.bp
@@ -48,6 +48,8 @@ libc_common_flags = [
     "-Werror=int-to-pointer-cast",
     "-Werror=type-limits",
     "-Werror",
+
+    "-DH_MALLOC_PREFIX",
 ]
 
 // Define some common cflags
@@ -61,9 +63,17 @@ cc_defaults {
     cppflags: [],
     include_dirs: [
         "bionic/libc/async_safe/include",
-        "external/jemalloc/include",
     ],
 
+    multilib: {
+        lib32: {
+            include_dirs: ["external/jemalloc/include"],
+        },
+        lib64: {
+            include_dirs: ["external/hardened_malloc/"],
+        },
+    },
+
     stl: "none",
     system_shared_libs: [],
     sanitize: {
@@ -1641,11 +1651,6 @@ cc_library_static {
     name: "libc_ndk",
     defaults: ["libc_defaults"],
     srcs: libc_common_src_files + ["bionic/malloc_common.cpp"],
-    multilib: {
-        lib32: {
-            srcs: libc_common_src_files_32,
-        },
-    },
     arch: {
         arm: {
             srcs: [
@@ -1676,9 +1681,18 @@ cc_library_static {
         "libc_syscalls",
         "libc_tzcode",
         "libm",
-        "libjemalloc",
         "libstdc++",
     ],
+
+    multilib: {
+        lib32: {
+            srcs: libc_common_src_files_32,
+            whole_static_libs: ["libjemalloc"],
+        },
+        lib64: {
+            whole_static_libs: ["libhardened_malloc"],
+        },
+    },
 }
 
 // ========================================================
@@ -1755,7 +1769,11 @@ cc_library_static {
 // ========================================================
 cc_library_static {
     defaults: ["libc_defaults"],
-    srcs: ["bionic/jemalloc_wrapper.cpp"],
+    multilib: {
+        lib32: {
+            srcs: ["bionic/jemalloc_wrapper.cpp"],
+        },
+    },
     cflags: ["-fvisibility=hidden"],
 
     name: "libc_malloc",
@@ -1814,7 +1832,16 @@ cc_library {
     // you wanted!
 
     shared_libs: ["libdl"],
-    whole_static_libs: ["libc_common", "libjemalloc"],
+    whole_static_libs: ["libc_common"],
+
+    multilib: {
+        lib32: {
+            whole_static_libs: ["libjemalloc"],
+        },
+        lib64: {
+            whole_static_libs: ["libhardened_malloc"],
+        },
+    },
 
     nocrt: true,
 
diff --git a/libc/bionic/malloc_common.cpp b/libc/bionic/malloc_common.cpp
index 1f201d1ca..06f85b40d 100644
--- a/libc/bionic/malloc_common.cpp
+++ b/libc/bionic/malloc_common.cpp
@@ -46,8 +46,13 @@
 #include <private/bionic_globals.h>
 #include <private/bionic_malloc_dispatch.h>
 
+#ifdef __LP64__
+#include "h_malloc.h"
+#define Malloc(function)  h_ ## function
+#else
 #include "jemalloc.h"
 #define Malloc(function)  je_ ## function
+#endif
 
 static constexpr MallocDispatch __libc_malloc_default_dispatch
   __attribute__((unused)) = {