Bug 1797697 - Make names of power tracks for AMD CPUs on Windows 11 more user friendly, r=smaug.

Differential Revision: https://phabricator.services.mozilla.com/D160548

tools/profiler/core/PowerCounters-win.cpp

@@ -73,10 +73,19 @@ class PowerMeterChannel final : public BaseProfilerCount {
     } else if (mChannelName.Equals("RAPL_Package0_DRAM")) {
       mLabel = "Power: DRAM";
       mDescription = mChannelName.get();
+    } else {
+      unsigned int coreId;
+      if (sscanf(mChannelName.get(), "RAPL_Package0_Core%u_CORE", &coreId) ==
+          1) {
+        mLabelString = "Power: CPU core ";
+        mLabelString.AppendInt(coreId);
+        mLabel = mLabelString.get();
+        mDescription = mChannelName.get();
       } else {
         mLabel = mChannelName.get();
       }
     }
+  }
 
   CountSample Sample() override {
     CountSample result;
@@ -106,6 +115,10 @@ class PowerMeterChannel final : public BaseProfilerCount {
  private:
   int64_t mCounter;
   nsCString mChannelName;
+
+  // Used as a storage when the label can not be a literal string.
+  nsCString mLabelString;
+
   ULONGLONG mPreviousValue;
   ULONGLONG mPreviousTime;
   bool mIsSampleNew;