Line data    Source code

       1             : //===- FDRTraceExpander.h - XRay FDR Mode Log Expander --------------------===//
       2             : //
       3             : //                     The LLVM Compiler Infrastructure
       4             : //
       5             : // This file is distributed under the University of Illinois Open Source
       6             : // License. See LICENSE.TXT for details.
       7             : //
       8             : //===----------------------------------------------------------------------===//
       9             : //
      10             : // We define an FDR record visitor which can re-constitute XRayRecord instances
      11             : // from a sequence of FDR mode records in arrival order into a collection.
      12             : //
      13             : //===----------------------------------------------------------------------===//
      14             : #ifndef INCLUDE_LLVM_XRAY_FDRTRACEEXPANDER_H_
      15             : #define INCLUDE_LLVM_XRAY_FDRTRACEEXPANDER_H_
      16             : 
      17             : #include "llvm/ADT/STLExtras.h"
      18             : #include "llvm/XRay/FDRRecords.h"
      19             : #include "llvm/XRay/XRayRecord.h"
      20             : 
      21             : namespace llvm {
      22             : namespace xray {
      23             : 
      24           7 : class TraceExpander : public RecordVisitor {
      25             :   // Type-erased callback for handling individual XRayRecord instances.
      26             :   function_ref<void(const XRayRecord &)> C;
      27             :   int32_t PID = 0;
      28             :   int32_t TID = 0;
      29             :   uint64_t BaseTSC = 0;
      30             :   XRayRecord CurrentRecord{0, 0, RecordTypes::ENTER, 0, 0, 0, 0, {}};
      31             :   uint16_t CPUId = 0;
      32             :   uint16_t LogVersion = 0;
      33             :   bool BuildingFunction = false;
      34             :   bool IgnoringRecords = false;
      35             : 
      36             :   void resetCurrentRecord();
      37             : 
      38             : public:
      39             :   explicit TraceExpander(function_ref<void(const XRayRecord &)> F, uint16_t L)
      40          14 :       : RecordVisitor(), C(std::move(F)), LogVersion(L) {}
      41             : 
      42             :   Error visit(BufferExtents &) override;
      43             :   Error visit(WallclockRecord &) override;
      44             :   Error visit(NewCPUIDRecord &) override;
      45             :   Error visit(TSCWrapRecord &) override;
      46             :   Error visit(CustomEventRecord &) override;
      47             :   Error visit(CallArgRecord &) override;
      48             :   Error visit(PIDRecord &) override;
      49             :   Error visit(NewBufferRecord &) override;
      50             :   Error visit(EndBufferRecord &) override;
      51             :   Error visit(FunctionRecord &) override;
      52             : 
      53             :   // Must be called after all the records have been processed, to handle the
      54             :   // most recent record generated.
      55             :   Error flush();
      56             : };
      57             : 
      58             : } // namespace xray
      59             : } // namespace llvm
      60             : 
      61             : #endif // INCLUDE_LLVM_XRAY_FDRTRACEEXPANDER_H_