[asancov] Write coverage directly to a memory-mapped file.

This way does not require a __sanitizer_cov_dump() call. That's
important on Android, where apps can be killed at arbitrary time.

We write raw PCs to disk instead of module offsets; we also write
memory layout to a separate file. This increases dump size by the
factor of 2 on 64-bit systems.

llvm-svn: 209653

1 files changed, 1 insertions, 0 deletions

diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_flags.h b/compiler-rt/lib/sanitizer_common/sanitizer_flags.h
index 1d87f5a4bc6..1ad53dc6711 100644
--- a/compiler-rt/lib/sanitizer_common/sanitizer_flags.h
+++ b/compiler-rt/lib/sanitizer_common/sanitizer_flags.h
@@ -54,6 +54,7 @@ struct CommonFlags {
   bool help;
   uptr mmap_limit_mb;
   bool coverage;
+  bool coverage_direct;
   bool full_address_space;
 };