[Lldb-commits] [PATCH] D85705: Add a "Trace" plug-in to LLDB to add process trace support in stages.

[Greg Clayton via Phabricator via lldb-commits]

clayborg added a comment.

The idea for the JSON file is that it must have a "name" (or maybe "plug-in"?) to identify which trace plug-in and a "trace-file" at the very least:

  {
    "name": "intel-pt", 
    "trace-file": "/tmp/trace-info" 
  }

The "name" field would match the name of the trace plug-in in LLDB.

For intel PT they need info about the CPU. Some intel PT libraries have a structure like:

  // A cpu vendor.
  enum pt_cpu_vendor {
      pcv_unknown,
      pcv_intel
  };
  
  struct pt_cpu {
    enum pt_cpu_vendor vendor;
    uint16_t family;
    uint8_t model;
    uint8_t stepping;
  };

So the trace JSON file for intel-pt might look like:

  { 
    "name": "intel-pt", 
    "trace-file": "/tmp/a",
    "pt_cpu": {
      "vendor": "intel",
      "family": 10,
      "model": 2,
      "stepping": 1
    }
  }




Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D85705/new/

https://reviews.llvm.org/D85705