[compiler-rt] 7590c00 - [dfsan] Turn off THP at dfsan_flush

[Jianzhou Zhao via llvm-commits]

Author: Jianzhou Zhao
Date: 2021-02-12T17:10:09Z
New Revision: 7590c0078dd53d9ad508725fc27d96705ac3a206

URL: https://github.com/llvm/llvm-project/commit/7590c0078dd53d9ad508725fc27d96705ac3a206
DIFF: https://github.com/llvm/llvm-project/commit/7590c0078dd53d9ad508725fc27d96705ac3a206.diff

LOG: [dfsan] Turn off THP at dfsan_flush

https://reviews.llvm.org/D89662 turned this off at dfsan_init.
dfsan_flush also needs to turn it off.
W/o this a program may get more and more memory usage after hours.

Reviewed-by: morehouse

Differential Revision: https://reviews.llvm.org/D96569

Added: 
    

Modified: 
    compiler-rt/lib/dfsan/dfsan.cpp

Removed: 
    


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diff  --git a/compiler-rt/lib/dfsan/dfsan.cpp b/compiler-rt/lib/dfsan/dfsan.cpp
index 43a5fe9e62a8..7abdf68e48b9 100644
--- a/compiler-rt/lib/dfsan/dfsan.cpp
+++ b/compiler-rt/lib/dfsan/dfsan.cpp
@@ -551,7 +551,7 @@ static void dfsan_fini() {
 }
 
 extern "C" void dfsan_flush() {
-  if (!MmapFixedNoReserve(ShadowAddr(), UnusedAddr() - ShadowAddr()))
+  if (!MmapFixedSuperNoReserve(ShadowAddr(), UnusedAddr() - ShadowAddr()))
     Die();
 }
 
@@ -560,8 +560,7 @@ static void dfsan_init(int argc, char **argv, char **envp) {
 
   ::InitializePlatformEarly();
 
-  if (!MmapFixedSuperNoReserve(ShadowAddr(), UnusedAddr() - ShadowAddr()))
-    Die();
+  dfsan_flush();
   if (common_flags()->use_madv_dontdump)
     DontDumpShadowMemory(ShadowAddr(), UnusedAddr() - ShadowAddr());