[sanitizer] allow to reset the bb/edge coverage data inside the process while it is running (single-threaded). Also expose the current coverage set to the process.

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@227387 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 8 insertions, 0 deletions

diff --git a/include/sanitizer/common_interface_defs.h b/include/sanitizer/common_interface_defs.h
index 4c715c66b..cfb06eac0 100644
--- a/include/sanitizer/common_interface_defs.h
+++ b/include/sanitizer/common_interface_defs.h
@@ -74,6 +74,14 @@ extern "C" {
   // This can be useful for coverage-directed in-process fuzzers.
   uintptr_t __sanitizer_get_total_unique_coverage();
 
+  // Reset the basic-block (edge) coverage to the initial state.
+  // Useful for in-process fuzzing to start collecting coverage from scratch.
+  // Experimental, will likely not work for multi-threaded process.
+  void __sanitizer_reset_coverage();
+  // Set *data to the array of covered PCs and return the size of that array.
+  // Some of the entries in *data will be zero.
+  uintptr_t __sanitizer_get_coverage_guards(uintptr_t **data);
+
   // Annotate the current state of a contiguous container, such as
   // std::vector, std::string or similar.
   // A contiguous container is a container that keeps all of its elements