[scudo] Allow options to be defined at compile time

Summary:
Allow for options to be defined at compile time, like is already the case for
other sanitizers, via `SCUDO_DEFAULT_OPTIONS`.

Reviewers: alekseyshl, dberris

Reviewed By: alekseyshl, dberris

Subscribers: kubamracek, delcypher, llvm-commits, #sanitizers

Differential Revision: https://reviews.llvm.org/D42980

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@324620 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 11 insertions, 0 deletions

diff --git a/lib/scudo/scudo_flags.cpp b/lib/scudo/scudo_flags.cpp
index ad50800c4..c012471a8 100644
--- a/lib/scudo/scudo_flags.cpp
+++ b/lib/scudo/scudo_flags.cpp
@@ -35,6 +35,14 @@ static void RegisterScudoFlags(FlagParser *parser, Flags *f) {
 #undef SCUDO_FLAG
 }
 
+static const char *getCompileDefinitionScudoDefaultOptions() {
+#ifdef SCUDO_DEFAULT_OPTIONS
+  return SANITIZER_STRINGIFY(SCUDO_DEFAULT_OPTIONS);
+#else
+  return "";
+#endif
+}
+
 static const char *getScudoDefaultOptions() {
   return (&__scudo_default_options) ? __scudo_default_options() : "";
 }
@@ -54,6 +62,9 @@ void initFlags() {
   RegisterScudoFlags(&ScudoParser, f);
   RegisterCommonFlags(&ScudoParser);
 
+  // Override from compile definition.
+  ScudoParser.ParseString(getCompileDefinitionScudoDefaultOptions());
+
   // Override from user-specified string.
   ScudoParser.ParseString(getScudoDefaultOptions());