Bug 1000621 - Check if DMD is enabled before dumping. r=njn. DONTBUILD

memory/replace/dmd/DMD.cpp

@@ -2095,6 +2095,12 @@ ClearReports()
   ClearReportsInternal();
 }
 
+MOZ_EXPORT bool
+IsEnabled()
+{
+  return gIsDMDRunning;
+}
+
 MOZ_EXPORT void
 Dump(Writer aWriter)
 {

memory/replace/dmd/DMD.h

@@ -78,6 +78,10 @@ struct Sizes
 MOZ_EXPORT void
 SizeOf(Sizes* aSizes);
 
+// Indicates whether or not DMD is enabled.
+MOZ_EXPORT bool
+IsEnabled();
+
 } // namespace mozilla
 } // namespace dmd
 

xpcom/base/nsMemoryInfoDumper.cpp

@@ -516,6 +516,10 @@ nsMemoryInfoDumper::DumpMemoryInfoToTempDir(const nsAString& aIdentifier,
 nsresult
 nsMemoryInfoDumper::DumpDMD(const nsAString &aIdentifier)
 {
+  if (!dmd::IsEnabled()) {
+    return NS_OK;
+  }
+
   nsresult rv;
 
   // Create a filename like dmd-<identifier>-<pid>.txt.gz, which will be used