[llvm] [llvm]Add a simple Telemetry framework (PR #102323)

[Vy Nguyen via llvm-commits]

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@@ -27,14 +27,14 @@ namespace telemetry {
 
 class Serializer {
 public:
-  virtual llvm::Error init() = 0;
+  virtual Error init() = 0;
   virtual void write(StringRef KeyName, bool Value) = 0;
   virtual void write(StringRef KeyName, int Value) = 0;
-  virtual void write(StringRef KeyName, size_t Value) = 0;
+  virtual void write(StringRef KeyName, unsigned long long Value) = 0;
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oontvoo wrote:

These types are based on the set of data we need to collect in LLDB.
 - bool, int : basic types, nothing too strange
 -  size_t: this is needed to represent the size of a debug target and also for storing number of nanoseconds.
 - StringRef: binary paths, names, etc
 - map<string,string>: for storing misc data (eg., binary's ID fields, error messages, etc).


https://github.com/llvm/llvm-project/pull/102323