Fix initialization of OptimizingCompilerStats.

This is a follow-up to
    https://android-review.googlesource.com/343265
where we replaced Atomic<> with std::atomic<> because
Atomic<> was hiding std::atomic<>::operator=(). However,
while the default constructor of Atomic<> initializes the
value, the default constructor of std::atomic<> does not.

Test: m valgrind-test-art-host
Bug: 34053922
Change-Id: Iff2b38a7b28ee2d114991b60e3c40a33425bfc48

1 files changed, 4 insertions, 1 deletions

diff --git a/compiler/optimizing/optimizing_compiler_stats.h b/compiler/optimizing/optimizing_compiler_stats.h
index f7f6a14e9d..7240d40d7f 100644
--- a/compiler/optimizing/optimizing_compiler_stats.h
+++ b/compiler/optimizing/optimizing_compiler_stats.h
@@ -73,7 +73,10 @@ enum MethodCompilationStat {
 
 class OptimizingCompilerStats {
  public:
-  OptimizingCompilerStats() {}
+  OptimizingCompilerStats() {
+    // The std::atomic<> default constructor leaves values uninitialized, so initialize them now.
+    Reset();
+  }
 
   void RecordStat(MethodCompilationStat stat, uint32_t count = 1) {
     compile_stats_[stat] += count;