[PATCH] make msandr access tls directly

[Evgeniy Stepanov]

================
Comment at: msandr.cc:373
@@ -368,1 +372,3 @@
 #else  /* !MSANDR_STANDALONE_TEST */
+# ifdef MSANDR_NATIVE_EXEC
+  /* For optimized native exec, -mangle_app_seg and -private_loader are turned off,
----------------
In fact, since we control all transitions between instrumented and uninstrumented code, we can do this cleanup exactly once per transition.

This memory is only ever written non-zero values in instrumented code.

If I understand correctly, this is a correctness rather then optimization change. If so, LGTM, and the above can be addressed later.

================
Comment at: msandr.cc:420
@@ -405,1 +419,3 @@
 #else  /* !MSANDR_STANDALONE_TEST */
+# ifdef MSANDR_NATIVE_EXEC
+  for (int i = 0; i < NUM_TLS_PARAM; ++i) {
----------------
The same as retval_tls.


http://llvm-reviews.chandlerc.com/D2568