From 92915e31e988c1b89a07c035029dc2f289afb789 Mon Sep 17 00:00:00 2001 From: Owen Anderson Date: Tue, 23 Jun 2009 21:19:38 +0000 Subject: Use atomic operations when accessing statistics, and make the lazy initialization of statistics actually threadsafe. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@74005 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/Support/Statistic.cpp | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-) (limited to 'lib/Support/Statistic.cpp') diff --git a/lib/Support/Statistic.cpp b/lib/Support/Statistic.cpp index 6c652f8d3f..33570b0ee5 100644 --- a/lib/Support/Statistic.cpp +++ b/lib/Support/Statistic.cpp @@ -66,10 +66,14 @@ void Statistic::RegisterStatistic() { // If stats are enabled, inform StatInfo that this statistic should be // printed. sys::ScopedLock Writer(&*StatLock); - if (Enabled) - StatInfo->addStatistic(this); - // Remember we have been registered. - Initialized = true; + if (!Initialized) { + if (Enabled) + StatInfo->addStatistic(this); + + sys::MemoryFence(); + // Remember we have been registered. + Initialized = true; + } } namespace { -- cgit v1.2.3-18-g5258