Include calling address in tracked activities.

base/debug/activity_analyzer.h

Index: base/debug/activity_analyzer.h
diff --git a/base/debug/activity_analyzer.h b/base/debug/activity_analyzer.h
index 14244b7b1fe80384f477f7fbfacdfced7c7b374b..74d8ad802eb0c25d81caf70a02e24d4f278315b6 100644
--- a/base/debug/activity_analyzer.h
+++ b/base/debug/activity_analyzer.h
@@ -99,6 +99,11 @@ class BASE_EXPORT ThreadActivityAnalyzer {
 // show small inconsistencies between threads if attempted on a live system.
 class BASE_EXPORT GlobalActivityAnalyzer {
  public:
+  struct ProgramLocation {
+    int module;
+    uintptr_t offset;
+  };
+
   using ThreadKey = ThreadActivityAnalyzer::ThreadKey;
 
   // Creates a global analyzer from a persistent memory allocator.
@@ -124,6 +129,10 @@ class BASE_EXPORT GlobalActivityAnalyzer {
   // Ownership stays with the global analyzer object.
   ThreadActivityAnalyzer* GetAnalyzerForThread(const ThreadKey& key);
 
+  // Gets the corresponding "program location" for a given "program counter".
+  // This will return {0,0} if no mapping could be found.
+  ProgramLocation GetProgramLocationFromAddress(uint64_t address);
+
  private:
   using AnalyzerMap =
       std::map<ThreadKey, std::unique_ptr<ThreadActivityAnalyzer>>;