Bug 716619 - Simplify GC probes (r=sfink)

js/src/ETWProvider.man

@@ -79,29 +79,29 @@
           <!-- GC -->
           <event symbol="EvtGCStart" value="1012" version="1"
                  channel="MozillaChannel" level="win:Informational"
-                 template="CompartmentTemplate" task="Allocation" opcode="GCStart"
+                 template="VoidTemplate" task="Allocation" opcode="GCStart"
                  keywords="SampleKeyword" message="$(string.SampleProvider.SampleEvent.message)"/>
           <event symbol="EvtGCEnd" value="1013" version="1"
                  channel="MozillaChannel" level="win:Informational"
-                 template="CompartmentTemplate" task="Allocation" opcode="GCEnd"
+                 template="VoidTemplate" task="Allocation" opcode="GCEnd"
                  keywords="SampleKeyword" message="$(string.SampleProvider.SampleEvent.message)"/>
 
           <event symbol="EvtGCStartMarkPhase" value="1014" version="1"
                  channel="MozillaChannel" level="win:Informational"
-                 template="CompartmentTemplate" task="Allocation" opcode="GCMarkStart"
+                 template="VoidTemplate" task="Allocation" opcode="GCMarkStart"
                  keywords="SampleKeyword" message="$(string.SampleProvider.SampleEvent.message)"/>
           <event symbol="EvtGCEndMarkPhase" value="1015" version="1"
                  channel="MozillaChannel" level="win:Informational"
-                 template="CompartmentTemplate" task="Allocation" opcode="GCMarkEnd"
+                 template="VoidTemplate" task="Allocation" opcode="GCMarkEnd"
                  keywords="SampleKeyword" message="$(string.SampleProvider.SampleEvent.message)"/>
                     
           <event symbol="EvtGCStartSweepPhase" value="1016" version="1"
                  channel="MozillaChannel" level="win:Informational"
-                 template="CompartmentTemplate" task="Allocation" opcode="GCSweepStart"
+                 template="VoidTemplate" task="Allocation" opcode="GCSweepStart"
                  keywords="SampleKeyword" message="$(string.SampleProvider.SampleEvent.message)"/>
           <event symbol="EvtGCEndSweepPhase" value="1017" version="1"
                  channel="MozillaChannel" level="win:Informational"
-                 template="CompartmentTemplate" task="Allocation" opcode="GCSweepEnd"
+                 template="VoidTemplate" task="Allocation" opcode="GCSweepEnd"
                  keywords="SampleKeyword" message="$(string.SampleProvider.SampleEvent.message)"/>
 
           <event symbol="EvtMemoryAcquire" value="1018" version="1"
@@ -231,10 +231,6 @@
             <data name="Size" inType="win:Int64" outType="xs:long"/>
           </template>
 
-          <template tid="CompartmentTemplate">
-            <data name="Compartment" inType="win:Int64" outType="xs:long"/>
-          </template>
-
           <template tid="MemoryLocationTemplate">
             <data name="Compartment" inType="win:Int64" outType="xs:long"/>
             <data name="Address" inType="win:Int64" outType="xs:long"/>
@@ -259,6 +255,9 @@
             <data name="Int" inType="win:Int32" outType="xs:int"/>
           </template>
 
+          <template tid="VoidTemplate">
+          </template>
+
         </templates>
       </provider>
     </events>

js/src/gc/Statistics.cpp

@@ -206,7 +206,7 @@ Statistics::beginGC(JSCompartment *comp, gcreason::Reason reason)
     triggerReason = reason;
 
     beginPhase(PHASE_GC);
-    Probes::GCStart(compartment);
+    Probes::GCStart();
 
     GCCrashData crashData;
     crashData.isCompartment = !!compartment;
@@ -283,7 +283,7 @@ Statistics::printStats()
 void
 Statistics::endGC()
 {
-    Probes::GCEnd(compartment);
+    Probes::GCEnd();
     endPhase(PHASE_GC);
     crash::SnapshotGCStack();
 
@@ -315,16 +315,10 @@ Statistics::beginPhase(Phase phase)
 {
     phaseStarts[phase] = PRMJ_Now();
 
-    if (phase == gcstats::PHASE_SWEEP) {
+    if (phase == gcstats::PHASE_MARK)
-        Probes::GCStartSweepPhase(NULL);
+        Probes::GCStartMarkPhase();
-        if (!compartment) {
+    else if (phase == gcstats::PHASE_SWEEP)
-            for (JSCompartment **c = runtime->compartments.begin();
+        Probes::GCStartSweepPhase();
-                 c != runtime->compartments.end(); ++c)
-            {
-                Probes::GCStartSweepPhase(*c);
-            }
-        }
-    }
 }
 
 void
@@ -333,16 +327,10 @@ Statistics::endPhase(Phase phase)
     phaseEnds[phase] = PRMJ_Now();
     phaseTimes[phase] += phaseEnds[phase] - phaseStarts[phase];
 
-    if (phase == gcstats::PHASE_SWEEP) {
+    if (phase == gcstats::PHASE_MARK)
-        if (!compartment) {
+        Probes::GCEndMarkPhase();
-            for (JSCompartment **c = runtime->compartments.begin();
+    else if (phase == gcstats::PHASE_SWEEP)
-                 c != runtime->compartments.end(); ++c)
+        Probes::GCEndSweepPhase();
-            {
-                Probes::GCEndSweepPhase(*c);
-            }
-        }
-        Probes::GCEndSweepPhase(NULL);
-    }
 }
 
 } /* namespace gcstats */

js/src/jsprobes.h

@@ -190,21 +190,21 @@ bool releaseMemory(JSContext *cx, void *address, size_t nbytes);
  * Garbage collection probes
  *
  * GC timing is tricky and at the time of this writing is changing frequently.
- * GCStart(NULL)/GCEnd(NULL) are intended to bracket the entire garbage
+ * GCStart/GCEnd are intended to bracket the entire garbage collection (either
- * collection (either global or single-compartment), but a separate thread may
+ * global or single-compartment), but a separate thread may continue doing work
- * continue doing work after GCEnd.
+ * after GCEnd.
  *
  * Multiple compartments' GC will be interleaved during a global collection
  * (eg, compartment 1 starts, compartment 2 starts, compartment 1 ends, ...)
  */
-bool GCStart(JSCompartment *compartment);
+bool GCStart();
-bool GCEnd(JSCompartment *compartment);
+bool GCEnd();
 
-bool GCStartMarkPhase(JSCompartment *compartment);
+bool GCStartMarkPhase();
-bool GCEndMarkPhase(JSCompartment *compartment);
+bool GCEndMarkPhase();
 
-bool GCStartSweepPhase(JSCompartment *compartment);
+bool GCStartSweepPhase();
-bool GCEndSweepPhase(JSCompartment *compartment);
+bool GCEndSweepPhase();
 
 /*
  * Various APIs for inserting custom probe points. These might be used to mark
@@ -363,12 +363,12 @@ bool ETWCalloutBegin(JSContext *cx, JSFunction *fun);
 bool ETWCalloutEnd(JSContext *cx, JSFunction *fun);
 bool ETWAcquireMemory(JSContext *cx, void *address, size_t nbytes);
 bool ETWReleaseMemory(JSContext *cx, void *address, size_t nbytes);
-bool ETWGCStart(JSCompartment *compartment);
+bool ETWGCStart();
-bool ETWGCEnd(JSCompartment *compartment);
+bool ETWGCEnd();
-bool ETWGCStartMarkPhase(JSCompartment *compartment);
+bool ETWGCStartMarkPhase();
-bool ETWGCEndMarkPhase(JSCompartment *compartment);
+bool ETWGCEndMarkPhase();
-bool ETWGCStartSweepPhase(JSCompartment *compartment);
+bool ETWGCStartSweepPhase();
-bool ETWGCEndSweepPhase(JSCompartment *compartment);
+bool ETWGCEndSweepPhase();
 bool ETWCustomMark(JSString *string);
 bool ETWCustomMark(const char *string);
 bool ETWCustomMark(int marker);
@@ -644,12 +644,12 @@ Probes::releaseMemory(JSContext *cx, void *address, size_t nbytes)
 }
 
 inline bool
-Probes::GCStart(JSCompartment *compartment)
+Probes::GCStart()
 {
     bool ok = true;
 
 #ifdef MOZ_ETW
-    if (ProfilingActive && !ETWGCStart(compartment))
+    if (ProfilingActive && !ETWGCStart())
         ok = false;
 #endif
 
@@ -657,12 +657,12 @@ Probes::GCStart(JSCompartment *compartment)
 }
 
 inline bool
-Probes::GCEnd(JSCompartment *compartment)
+Probes::GCEnd()
 {
     bool ok = true;
 
 #ifdef MOZ_ETW
-    if (ProfilingActive && !ETWGCEnd(compartment))
+    if (ProfilingActive && !ETWGCEnd())
         ok = false;
 #endif
 
@@ -670,12 +670,12 @@ Probes::GCEnd(JSCompartment *compartment)
 }
 
 inline bool
-Probes::GCStartMarkPhase(JSCompartment *compartment)
+Probes::GCStartMarkPhase()
 {
     bool ok = true;
 
 #ifdef MOZ_ETW
-    if (ProfilingActive && !ETWGCStartMarkPhase(compartment))
+    if (ProfilingActive && !ETWGCStartMarkPhase())
         ok = false;
 #endif
 
@@ -683,12 +683,12 @@ Probes::GCStartMarkPhase(JSCompartment *compartment)
 }
 
 inline bool
-Probes::GCEndMarkPhase(JSCompartment *compartment)
+Probes::GCEndMarkPhase()
 {
     bool ok = true;
 
 #ifdef MOZ_ETW
-    if (ProfilingActive && !ETWGCEndMarkPhase(compartment))
+    if (ProfilingActive && !ETWGCEndMarkPhase())
         ok = false;
 #endif
 
@@ -696,12 +696,12 @@ Probes::GCEndMarkPhase(JSCompartment *compartment)
 }
 
 inline bool
-Probes::GCStartSweepPhase(JSCompartment *compartment)
+Probes::GCStartSweepPhase()
 {
     bool ok = true;
 
 #ifdef MOZ_ETW
-    if (ProfilingActive && !ETWGCStartSweepPhase(compartment))
+    if (ProfilingActive && !ETWGCStartSweepPhase())
         ok = false;
 #endif
 
@@ -709,12 +709,12 @@ Probes::GCStartSweepPhase(JSCompartment *compartment)
 }
 
 inline bool
-Probes::GCEndSweepPhase(JSCompartment *compartment)
+Probes::GCEndSweepPhase()
 {
     bool ok = true;
 
 #ifdef MOZ_ETW
-    if (ProfilingActive && !ETWGCEndSweepPhase(compartment))
+    if (ProfilingActive && !ETWGCEndSweepPhase())
         ok = false;
 #endif