Bug 895019 - Tracelogger: Add logger for minor gc, r=jandem

js/src/TraceLogging.cpp

@@ -70,6 +70,8 @@ const char* const TraceLogging::type_name[] = {
     "stop,yarr_jit_execute",
     "start,gc",
     "stop,gc",
+    "start,minor_gc",
+    "stop,minor_gc",
     "info,engine,interpreter",
     "info,engine,baseline",
     "info,engine,ionmonkey"

js/src/TraceLogging.h

@@ -23,6 +23,8 @@ class TraceLogging
         YARR_JIT_STOP,
         GC_START,
         GC_STOP,
+        MINOR_GC_START,
+        MINOR_GC_STOP,
         INFO_ENGINE_INTERPRETER,
         INFO_ENGINE_BASELINE,
         INFO_ENGINE_IONMONKEY,

js/src/jsgc.cpp

@@ -4677,6 +4677,11 @@ void
 js::MinorGC(JSRuntime *rt, JS::gcreason::Reason reason)
 {
 #ifdef JSGC_GENERATIONAL
+#if JS_TRACE_LOGGING
+    AutoTraceLog logger(TraceLogging::defaultLogger(),
+                        TraceLogging::MINOR_GC_START,
+                        TraceLogging::MINOR_GC_STOP);
+#endif
     rt->gcNursery.collect(rt, reason);
 #endif
 }