[asan] introduce interface function __sanitizer_verify_contiguous_container to verify annotations in vector-like containers

llvm-svn: 208092

1 files changed, 8 insertions, 0 deletions

diff --git a/compiler-rt/include/sanitizer/common_interface_defs.h b/compiler-rt/include/sanitizer/common_interface_defs.h
index 798f0c52f96..fa3c14d1b53 100644
--- a/compiler-rt/include/sanitizer/common_interface_defs.h
+++ b/compiler-rt/include/sanitizer/common_interface_defs.h
@@ -86,6 +86,14 @@ extern "C" {
                                                  const void *end,
                                                  const void *old_mid,
                                                  const void *new_mid);
+  // Returns true if the contiguous container [beg, end) ir properly poisoned
+  // (e.g. with __sanitizer_annotate_contiguous_container), i.e. if
+  //  - [beg, mid) is addressable,
+  //  - [mid, end) is unaddressable.
+  // Full verification requires O(end-beg) time; this function tries to avoid
+  // such complexity by touching only parts of the container around beg/mid/end.
+  int __sanitizer_verify_contiguous_container(const void *beg, const void *mid,
+                                              const void *end);
 
   // Print the stack trace leading to this call. Useful for debugging user code.
   void __sanitizer_print_stack_trace();