Fix asan false-positive errors: (#15563)

- Call __asan_handle_no_return in RtlRestoreContext if it doesn't return
  and in ThrowExceptionFromContextInternal function;

- Increase alternate signal stack size and use it also for asan.

1 files changed, 4 insertions, 3 deletions

diff --git a/enablesanitizers.sh b/enablesanitizers.sh
index 2937b0b2f4..aedb95d0d6 100755
--- a/enablesanitizers.sh
+++ b/enablesanitizers.sh
@@ -83,8 +83,9 @@ else
         unset DEBUG_SANITIZERS
         echo "Setting DEBUG_SANITIZERS="
     else
-        # for now, specify alloc_dealloc_mismatch=0 as there are too many error reports that are not an issue
-        ASAN_OPTIONS="symbolize=1 alloc_dealloc_mismatch=0"
+        # for now, specify alloc_dealloc_mismatch=0 as there are too many error reports that are not an issue.
+        # Also specify use_sigaltstack=0 as coreclr uses own alternate stack for signal handlers
+        ASAN_OPTIONS="symbolize=1 alloc_dealloc_mismatch=0 use_sigaltstack=0"
         # when Clang 3.8 available, add: suppressions=$(readlink -f sanitizersuppressions.txt)
         UBSAN_OPTIONS="print_stacktrace=1"
 
@@ -132,4 +133,4 @@ else
     unset __EnableLSan
     unset __TurnOff
     unset __Options
-fi
\ No newline at end of file
+fi