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] use Scudo on 32-bit and hardened_malloc on 64-bit

Co-authored-by: anupritaisno1 <www.anuprita804@gmail.com>
Signed-off-by: anupritaisno1 <www.anuprita804@gmail.com>
[tad@spotco.us]: kept Lineage's scudo 32-bit workaround
---
 libc/Android.bp                  | 37 ++++++++++++++---------
 libc/bionic/h_malloc_wrapper.cpp | 51 ++++++++++++++++++++++++++++++++
 libc/bionic/malloc_common.h      |  8 +++++
 3 files changed, 82 insertions(+), 14 deletions(-)
 create mode 100644 libc/bionic/h_malloc_wrapper.cpp

diff --git a/libc/Android.bp b/libc/Android.bp
index ce714054a..1599d5ed9 100644
--- a/libc/Android.bp
+++ b/libc/Android.bp
@@ -50,6 +50,8 @@ libc_common_flags = [
 
     // GWP-ASan requires platform TLS.
     "-fno-emulated-tls",
+
+    "-DH_MALLOC_PREFIX",
 ]
 
 // Define some common cflags
@@ -122,20 +124,19 @@ libc32_scudo_product_variables = {
 // ========================================================
 cc_defaults {
     name: "libc_native_allocator_defaults",
-
-    whole_static_libs: [
-        "libjemalloc5",
-        "libc_jemalloc_wrapper",
-    ],
-    header_libs: ["gwp_asan_headers"],
+    whole_static_libs: ["libc_jemalloc_wrapper"],
     multilib: {
-        lib64: {
-            product_variables: libc_scudo_product_variables,
-        },
         lib32: {
+            whole_static_libs: ["libjemalloc5"],
             product_variables: libc32_scudo_product_variables,
-        }
+        },
+        lib64: {
+            cflags: ["-DH_MALLOC_PREFIX"],
+            whole_static_libs: ["libhardened_malloc"],
+        },
     },
+
+    header_libs: ["gwp_asan_headers"],
 }
 
 // Functions not implemented by jemalloc directly, or that need to
@@ -143,12 +144,20 @@ cc_defaults {
 cc_library_static {
     name: "libc_jemalloc_wrapper",
     defaults: ["libc_defaults"],
-    srcs: ["bionic/jemalloc_wrapper.cpp"],
+    multilib: {
+        lib32: {
+            // Used to pull in the jemalloc/hardened_malloc include directory so that if the
+            // library is removed, the include directory is also removed.
+            srcs: ["bionic/jemalloc_wrapper.cpp"],
+            static_libs: ["libjemalloc5"],
+        },
+        lib64: {
+            srcs: ["bionic/h_malloc_wrapper.cpp"],
+            static_libs: ["libhardened_malloc"],
+        },
+    },
     cflags: ["-fvisibility=hidden"],
 
-    // Used to pull in the jemalloc include directory so that if the
-    // library is removed, the include directory is also removed.
-    static_libs: ["libjemalloc5"],
 }
 
 // ========================================================
diff --git a/libc/bionic/h_malloc_wrapper.cpp b/libc/bionic/h_malloc_wrapper.cpp
new file mode 100644
index 000000000..5fb0968c2
--- /dev/null
+++ b/libc/bionic/h_malloc_wrapper.cpp
@@ -0,0 +1,51 @@
+#include <errno.h>
+#include <malloc.h>
+#include <sys/param.h>
+#include <unistd.h>
+
+#include <private/MallocXmlElem.h>
+
+#include "h_malloc.h"
+
+__BEGIN_DECLS
+int h_malloc_info(int options, FILE* fp);
+__END_DECLS
+
+int h_malloc_info(int options, FILE* fp) {
+  if (options != 0) {
+    errno = EINVAL;
+    return -1;
+  }
+
+  fflush(fp);
+  int fd = fileno(fp);
+  MallocXmlElem root(fd, "malloc", "version=\"jemalloc-1\"");
+
+  // Dump all of the large allocations in the arenas.
+  for (size_t i = 0; i < h_mallinfo_narenas(); i++) {
+    struct mallinfo mi = h_mallinfo_arena_info(i);
+    if (mi.hblkhd != 0) {
+      MallocXmlElem arena_elem(fd, "heap", "nr=\"%d\"", i);
+      {
+        MallocXmlElem(fd, "allocated-large").Contents("%zu", mi.ordblks);
+        MallocXmlElem(fd, "allocated-huge").Contents("%zu", mi.uordblks);
+        MallocXmlElem(fd, "allocated-bins").Contents("%zu", mi.fsmblks);
+
+        size_t total = 0;
+        for (size_t j = 0; j < h_mallinfo_nbins(); j++) {
+          struct mallinfo mi = h_mallinfo_bin_info(i, j);
+          if (mi.ordblks != 0) {
+            MallocXmlElem bin_elem(fd, "bin", "nr=\"%d\"", j);
+            MallocXmlElem(fd, "allocated").Contents("%zu", mi.ordblks);
+            MallocXmlElem(fd, "nmalloc").Contents("%zu", mi.uordblks);
+            MallocXmlElem(fd, "ndalloc").Contents("%zu", mi.fordblks);
+            total += mi.ordblks;
+          }
+        }
+        MallocXmlElem(fd, "bins-total").Contents("%zu", total);
+      }
+    }
+  }
+
+  return 0;
+}
diff --git a/libc/bionic/malloc_common.h b/libc/bionic/malloc_common.h
index 4afcc4a8d..cca9e5202 100644
--- a/libc/bionic/malloc_common.h
+++ b/libc/bionic/malloc_common.h
@@ -67,8 +67,16 @@ __END_DECLS
 
 #else
 
+#ifdef __LP64__
+#include "h_malloc.h"
+#define Malloc(function)  h_ ## function
+__BEGIN_DECLS
+int h_malloc_info(int options, FILE* fp);
+__END_DECLS
+#else
 #include "jemalloc.h"
 #define Malloc(function)  je_ ## function
+#endif
 
 #endif