[asan] first attempt at releasing free-d memory back to the system using madvise. Requires quite some tuning.

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@279887 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 5 insertions, 0 deletions

diff --git a/lib/sanitizer_common/sanitizer_common.cc b/lib/sanitizer_common/sanitizer_common.cc
index 79fcbb118..de179be5f 100644
--- a/lib/sanitizer_common/sanitizer_common.cc
+++ b/lib/sanitizer_common/sanitizer_common.cc
@@ -157,6 +157,7 @@ bool ReadFileToBuffer(const char *file_name, char **buff, uptr *buff_size,
 }
 
 typedef bool UptrComparisonFunction(const uptr &a, const uptr &b);
+typedef bool U32ComparisonFunction(const u32 &a, const u32 &b);
 
 template<class T>
 static inline bool CompareLess(const T &a, const T &b) {
@@ -167,6 +168,10 @@ void SortArray(uptr *array, uptr size) {
   InternalSort<uptr*, UptrComparisonFunction>(&array, size, CompareLess);
 }
 
+void SortArray(u32 *array, uptr size) {
+  InternalSort<u32*, U32ComparisonFunction>(&array, size, CompareLess);
+}
+
 const char *StripPathPrefix(const char *filepath,
                             const char *strip_path_prefix) {
   if (!filepath) return nullptr;