Bug 1370734 - Fix hazards ; r=bustage

MozReview-Commit-ID: 1H4VwQ3Jdg6

js/src/devtools/rootAnalysis/analyzeHeapWrites.js

@@ -218,6 +218,7 @@ function treatAsSafeArgument(entry, varName, csuName)
         ["Gecko_CalcStyleDifference", "aAnyStyleChanged", null],
         ["Gecko_nsStyleSVG_CopyContextProperties", "aDst", null],
         ["Gecko_nsStyleFont_PrefillDefaultForGeneric", "aFont", null],
+        ["Gecko_nsStyleSVG_SetContextPropertiesLength", "aSvg", null],
     ];
     for (var [entryMatch, varMatch, csuMatch] of whitelist) {
         assert(entryMatch || varMatch || csuMatch);
@@ -332,7 +333,8 @@ function ignoreCallEdge(entry, callee)
     // We manually lock here
     if (name == "Gecko_nsFont_InitSystem" ||
         name == "Gecko_GetFontMetrics" ||
-        name == "ThreadSafeGetDefaultFontHelper")
+        name == "Gecko_nsStyleFont_FixupMinFontSize" ||
+        /ThreadSafeGetDefaultFontHelper/.test(name))
     {
         return true;
     }

taskcluster/scripts/builder/hazard-analysis.sh

@@ -160,7 +160,7 @@ function check_hazards () {
         exit 1
     fi
 
-    NUM_ALLOWED_WRITE_HAZARDS=6
+    NUM_ALLOWED_WRITE_HAZARDS=3
     if [ $NUM_WRITE_HAZARDS -gt $NUM_ALLOWED_WRITE_HAZARDS ]; then
         echo "TEST-UNEXPECTED-FAIL $NUM_WRITE_HAZARDS heap write hazards detected out of $NUM_ALLOWED_WRITE_HAZARDS allowed" >&2
         echo "TinderboxPrint: documentation<br/><a href='https://wiki.mozilla.org/Javascript:Hazard_Builds#Diagnosing_a_heap_write_hazard_failure'>heap write hazard analysis failures</a>, visit \"Inspect Task\" link for hazard details"