Skip over __restore_rt frames when generating profile analysis results. Bug

243483, r=shaver, sr=dbaron

tools/jprof/leaky.cpp

@@ -495,8 +495,19 @@ void leaky::analyze()
     int idx=-1, parrentIdx=-1;  // Init idx incase n==0
     for(int i=n-1; i>=0; --i, --pcp, parrentIdx=idx) {
       idx = findSymbolIndex(reinterpret_cast<u_long>(*pcp));
-      if(idx>=0) {
 
+      if(idx>=0) {
+	// Skip over bogus __restore_rt frames that realtime profiling
+	// can introduce.
+	if (i > 0 && !strcmp(externalSymbols[idx].name, "__restore_rt")) {
+	  --pcp;
+	  --i;
+	  idx = findSymbolIndex(reinterpret_cast<u_long>(*pcp));
+	  if (idx < 0) {
+	    continue;
+	  }
+	}
+	
 	// If we have not seen this symbol before count it and mark it as seen
 	if(flagArray[idx]!=stacks && ((flagArray[idx]=stacks) || true)) {
 	  ++countArray[idx];