[PATCH] D49152: SafeStack: Add builtins to read unsafe stack top/bottom

[Vlad Tsyrklevich via Phabricator via llvm-commits]

This revision was automatically updated to reflect the committed changes.
Closed by commit rCRT337037: SafeStack: Add builtins to read unsafe stack top/bottom (authored by vlad.tsyrklevich, committed by ).
Herald added a subscriber: Sanitizers.

Changed prior to commit:
  https://reviews.llvm.org/D49152?vs=154874&id=155463#toc

Repository:
  rCRT Compiler Runtime

https://reviews.llvm.org/D49152

Files:
  lib/safestack/safestack.cc


Index: lib/safestack/safestack.cc
===================================================================
--- lib/safestack/safestack.cc
+++ lib/safestack/safestack.cc
@@ -257,11 +257,20 @@
 #endif
 
 extern "C"
-    __attribute__((visibility("default"))) void *__get_unsafe_stack_start() {
+    __attribute__((visibility("default"))) void *__get_unsafe_stack_bottom() {
   return unsafe_stack_start;
 }
 
 extern "C"
+    __attribute__((visibility("default"))) void *__get_unsafe_stack_top() {
+  return (char*)unsafe_stack_start + unsafe_stack_size;
+}
+
+extern "C"
+    __attribute__((visibility("default"), alias("__get_unsafe_stack_bottom")))
+    void *__get_unsafe_stack_start();
+
+extern "C"
     __attribute__((visibility("default"))) void *__get_unsafe_stack_ptr() {
   return __safestack_unsafe_stack_ptr;
 }


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