Bug 962262 - Profiler - Use float instead of double to pack circular buffer. r=benwa

--HG--
extra : rebase_source : 4faee1a306c6b9d31f7d070d33d7269f1e0c1885

tools/profiler/BreakpadSampler.cpp

@@ -239,12 +239,12 @@ void populateBuffer(UnwinderThreadBuffer* utb, TickSample* sample,
   // Add any extras
   if (!sLastTracerEvent.IsNull() && sample) {
     TimeDuration delta = sample->timestamp - sLastTracerEvent;
-    utb__addEntry( utb, ProfileEntry('r', delta.ToMilliseconds()) );
+    utb__addEntry( utb, ProfileEntry('r', static_cast<float>(delta.ToMilliseconds())) );
   }
 
   if (sample) {
     TimeDuration delta = sample->timestamp - sStartTime;
-    utb__addEntry( utb, ProfileEntry('t', delta.ToMilliseconds()) );
+    utb__addEntry( utb, ProfileEntry('t', static_cast<float>(delta.ToMilliseconds())) );
   }
 
   if (sLastFrameNumber != sFrameNumber) {

tools/profiler/ProfileEntry.cpp

@@ -43,7 +43,7 @@ ProfileEntry::ProfileEntry(char aTagName, void *aTagPtr)
   , mTagName(aTagName)
 { }
 
-ProfileEntry::ProfileEntry(char aTagName, double aTagFloat)
+ProfileEntry::ProfileEntry(char aTagName, float aTagFloat)
   : mTagFloat(aTagFloat)
   , mTagName(aTagName)
 { }

tools/profiler/ProfileEntry.h

@@ -26,7 +26,7 @@ public:
   ProfileEntry(char aTagName, const char *aTagData);
   ProfileEntry(char aTagName, void *aTagPtr);
   ProfileEntry(char aTagName, ProfilerMarker *aTagMarker);
-  ProfileEntry(char aTagName, double aTagFloat);
+  ProfileEntry(char aTagName, float aTagFloat);
   ProfileEntry(char aTagName, uintptr_t aTagOffset);
   ProfileEntry(char aTagName, Address aTagAddress);
   ProfileEntry(char aTagName, int aTagLine);
@@ -51,7 +51,7 @@ private:
     char        mTagChars[sizeof(void*)];
     void*       mTagPtr;
     ProfilerMarker* mTagMarker;
-    double      mTagFloat;
+    float       mTagFloat;
     Address     mTagAddress;
     uintptr_t   mTagOffset;
     int         mTagLine;

tools/profiler/TableTicker.cpp

@@ -117,7 +117,7 @@ typename Builder::Object TableTicker::GetMetaJSCustomObject(Builder& b)
   b.DefineProperty(meta, "processType", XRE_GetProcessType());
 
   TimeDuration delta = TimeStamp::Now() - sStartTime;
-  b.DefineProperty(meta, "startTime", PR_Now()/1000.0 - delta.ToMilliseconds());
+  b.DefineProperty(meta, "startTime", static_cast<float>(PR_Now()/1000.0 - delta.ToMilliseconds()));
 
   nsresult res;
   nsCOMPtr<nsIHttpProtocolHandler> http = do_GetService(NS_NETWORK_PROTOCOL_CONTRACTID_PREFIX "http", &res);
@@ -639,17 +639,17 @@ void TableTicker::InplaceTick(TickSample* sample)
 
   if (!sLastTracerEvent.IsNull() && sample && currThreadProfile.IsMainThread()) {
     TimeDuration delta = sample->timestamp - sLastTracerEvent;
-    currThreadProfile.addTag(ProfileEntry('r', delta.ToMilliseconds()));
+    currThreadProfile.addTag(ProfileEntry('r', static_cast<float>(delta.ToMilliseconds())));
   }
 
   if (sample) {
     TimeDuration delta = sample->timestamp - sStartTime;
-    currThreadProfile.addTag(ProfileEntry('t', delta.ToMilliseconds()));
+    currThreadProfile.addTag(ProfileEntry('t', static_cast<float>(delta.ToMilliseconds())));
   }
 
 #if defined(XP_WIN)
   if (powerSample) {
-    currThreadProfile.addTag(ProfileEntry('p', mIntelPowerGadget->GetTotalPackagePowerInWatts()));
+    currThreadProfile.addTag(ProfileEntry('p', static_cast<float>(mIntelPowerGadget->GetTotalPackagePowerInWatts())));
   }
 #endif