[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

4 files changed, 5 insertions, 5 deletions

diff --git a/lib/tsan/rtl/tsan_mman.cc b/lib/tsan/rtl/tsan_mman.cc
index f99ddb35b..555fa11c2 100644
--- a/lib/tsan/rtl/tsan_mman.cc
+++ b/lib/tsan/rtl/tsan_mman.cc
@@ -54,7 +54,7 @@ struct MapUnmapCallback {
     diff = p + size - RoundDown(p + size, kPageSize);
     if (diff != 0)
       size -= diff;
-    FlushUnneededShadowMemory((uptr)MemToMeta(p), size / kMetaRatio);
+    ReleaseMemoryToOS((uptr)MemToMeta(p), size / kMetaRatio);
   }
 };
 
diff --git a/lib/tsan/rtl/tsan_platform_linux.cc b/lib/tsan/rtl/tsan_platform_linux.cc
index cd80e17fc..6c78a3b08 100644
--- a/lib/tsan/rtl/tsan_platform_linux.cc
+++ b/lib/tsan/rtl/tsan_platform_linux.cc
@@ -134,7 +134,7 @@ void WriteMemoryProfile(char *buf, uptr buf_size, uptr nthread, uptr nlive) {
 void FlushShadowMemoryCallback(
     const SuspendedThreadsList &suspended_threads_list,
     void *argument) {
-  FlushUnneededShadowMemory(ShadowBeg(), ShadowEnd() - ShadowBeg());
+  ReleaseMemoryToOS(ShadowBeg(), ShadowEnd() - ShadowBeg());
 }
 #endif
 
diff --git a/lib/tsan/rtl/tsan_rtl.cc b/lib/tsan/rtl/tsan_rtl.cc
index bda75d156..8fe9bf8d1 100644
--- a/lib/tsan/rtl/tsan_rtl.cc
+++ b/lib/tsan/rtl/tsan_rtl.cc
@@ -235,7 +235,7 @@ static void StopBackgroundThread() {
 void DontNeedShadowFor(uptr addr, uptr size) {
   uptr shadow_beg = MemToShadow(addr);
   uptr shadow_end = MemToShadow(addr + size);
-  FlushUnneededShadowMemory(shadow_beg, shadow_end - shadow_beg);
+  ReleaseMemoryToOS(shadow_beg, shadow_end - shadow_beg);
 }
 
 void MapShadow(uptr addr, uptr size) {
diff --git a/lib/tsan/rtl/tsan_rtl_thread.cc b/lib/tsan/rtl/tsan_rtl_thread.cc
index 13528ae98..fbe6111f6 100644
--- a/lib/tsan/rtl/tsan_rtl_thread.cc
+++ b/lib/tsan/rtl/tsan_rtl_thread.cc
@@ -68,8 +68,8 @@ void ThreadContext::OnCreated(void *arg) {
 
 void ThreadContext::OnReset() {
   CHECK_EQ(sync.size(), 0);
-  FlushUnneededShadowMemory(GetThreadTrace(tid), TraceSize() * sizeof(Event));
-  //!!! FlushUnneededShadowMemory(GetThreadTraceHeader(tid), sizeof(Trace));
+  ReleaseMemoryToOS(GetThreadTrace(tid), TraceSize() * sizeof(Event));
+  //!!! ReleaseMemoryToOS(GetThreadTraceHeader(tid), sizeof(Trace));
 }
 
 void ThreadContext::OnDetached(void *arg) {