Asynchronously pre-fault the native library pages.

third_party/android_crazy_linker/src/src/crazy_linker_memory_mapping.h

Index: third_party/android_crazy_linker/src/src/crazy_linker_memory_mapping.h
diff --git a/third_party/android_crazy_linker/src/src/crazy_linker_memory_mapping.h b/third_party/android_crazy_linker/src/src/crazy_linker_memory_mapping.h
index f981d5d8097c577ae7265ef81b4af3cff4eb21d5..7e4dd3f25aa7ae7de4d698927b26b945dff710ef 100644
--- a/third_party/android_crazy_linker/src/src/crazy_linker_memory_mapping.h
+++ b/third_party/android_crazy_linker/src/src/crazy_linker_memory_mapping.h
@@ -33,8 +33,10 @@ class MemoryMapping {
   // |size| is the page-aligned size, must be > 0.
   // |prot| are the desired protection bit flags.
   // |fd| is -1 (for anonymous mappings), or a valid file descriptor.
+  // |offset| offset into the file
   // on failure, return false and sets errno.
-  bool Allocate(void* address, size_t size, Protection prot, int fd) {
+  bool AllocateWithOffset(void* address, size_t size, Protection prot, int fd,
+                          size_t offset) {
     int flags = (fd >= 0) ? MAP_SHARED : MAP_ANONYMOUS;
     if (address)
       flags |= MAP_FIXED;
@@ -49,6 +51,16 @@ class MemoryMapping {
     return true;
   }
 
+  // Allocate a new mapping.
+  // |address| is either NULL or a fixed memory address.
+  // |size| is the page-aligned size, must be > 0.
+  // |prot| are the desired protection bit flags.
+  // |fd| is -1 (for anonymous mappings), or a valid file descriptor.
+  // on failure, return false and sets errno.
+  bool Allocate(void* address, size_t size, Protection prot, int fd) {
+    return AllocateWithOffset(address, size, prot, fd, 0);
+  }
+
   // Change the protection flags of the mapping.
   // On failure, return false and sets errno.
   bool SetProtection(Protection prot) {