Remove deprecated WITH_HOST_DALVIK.

Bug: 13751317
Fix the Mac build:
 - disable x86 selector removal that causes OS/X 10.9 kernel panics,
 - madvise don't need does zero memory on the Mac, factor into MemMap
   routine,
 - switch to the elf.h in elfutils to avoid Linux kernel dependencies,
 - we can't rely on exclusive_owner_ being available from other pthread
   libraries so maintain our own when futexes aren't available (we
   can't rely on the OS/X 10.8 hack any more),
 - fix symbol naming in assembly code,
 - work around C library differences,
 - disable backtrace in DumpNativeStack to avoid a broken libbacktrace
   dependency,
 - disable main thread signal handling logic,
 - align the stack in stub_test,
 - use $(HOST_SHLIB_SUFFIX) rather than .so in host make file variables.

Not all host tests are passing on the Mac with this change. dex2oat
works as does running HelloWorld.
Change-Id: I5a232aedfb2028524d49daa6397a8e60f3ee40d3

1 files changed, 12 insertions, 0 deletions

diff --git a/runtime/mem_map.cc b/runtime/mem_map.cc
index 22a61a21c0..81a86235ec 100644
--- a/runtime/mem_map.cc
+++ b/runtime/mem_map.cc
@@ -473,6 +473,18 @@ MemMap* MemMap::RemapAtEnd(byte* new_end, const char* tail_name, int tail_prot,
   return new MemMap(tail_name, actual, tail_size, actual, tail_base_size, tail_prot);
 }
 
+void MemMap::MadviseDontNeedAndZero() {
+  if (base_begin_ != nullptr || base_size_ != 0) {
+    if (!kMadviseZeroes) {
+      memset(base_begin_, 0, base_size_);
+    }
+    int result = madvise(base_begin_, base_size_, MADV_DONTNEED);
+    if (result == -1) {
+      PLOG(WARNING) << "madvise failed";
+    }
+  }
+}
+
 bool MemMap::Protect(int prot) {
   if (base_begin_ == nullptr && base_size_ == 0) {
     prot_ = prot;