[PATCH] D39624: [Sanitizers] Call NanoTime() conditionally.

[Aleksey Shlyapnikov via Phabricator via llvm-commits]

This revision was automatically updated to reflect the committed changes.
Closed by commit rL317386: [Sanitizers] Call NanoTime() conditionally. (authored by alekseyshl).

Repository:
  rL LLVM

https://reviews.llvm.org/D39624

Files:
  compiler-rt/trunk/lib/sanitizer_common/sanitizer_allocator_primary64.h


Index: compiler-rt/trunk/lib/sanitizer_common/sanitizer_allocator_primary64.h
===================================================================
--- compiler-rt/trunk/lib/sanitizer_common/sanitizer_allocator_primary64.h
+++ compiler-rt/trunk/lib/sanitizer_common/sanitizer_allocator_primary64.h
@@ -677,7 +677,10 @@
         // preventing just allocated memory from being released sooner than
         // necessary and also preventing extraneous ReleaseMemoryPagesToOS calls
         // for short lived processes.
-        region->rtoi.last_release_at_ns = NanoTime();
+        // Do it only when the feature is turned on, to avoid a potentially
+        // extraneous syscall.
+        if (ReleaseToOSIntervalMs() >= 0)
+          region->rtoi.last_release_at_ns = NanoTime();
       }
       // Do the mmap for the user memory.
       uptr map_size = kUserMapSize;


-------------- next part --------------
A non-text attachment was scrubbed...
Name: D39624.121566.patch
Type: text/x-patch
Size: 868 bytes
Desc: not available
URL: <http://lists.llvm.org/pipermail/llvm-commits/attachments/20171103/b33b88d9/attachment.bin>