[msan] Add __msan_check_mem_is_initialized.

An assert()-like function that checks that a memory range is fully initialized.


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@205413 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 4 insertions, 0 deletions

diff --git a/include/sanitizer/msan_interface.h b/include/sanitizer/msan_interface.h
index 41750d586..aae1a5b16 100644
--- a/include/sanitizer/msan_interface.h
+++ b/include/sanitizer/msan_interface.h
@@ -54,6 +54,10 @@ extern "C" {
      memory range, or -1 if the whole range is good. */
   intptr_t __msan_test_shadow(const volatile void *x, size_t size);
 
+  /* Checks that memory range is fully initialized, and reports an error if it
+   * is not. */
+  void __msan_check_mem_is_initialized(const volatile void *x, size_t size);
+
   /* Set exit code when error(s) were detected.
      Value of 0 means don't change the program exit code. */
   void __msan_set_exit_code(int exit_code);