text: /*----------------------------------------------------------------------------*/
  /* Copyright (c) 2008-2019 FIRST. All Rights Reserved.                        */
  /* Open Source Software - may be modified and shared by FRC teams. The code   */
  /* must be accompanied by the FIRST BSD license file in the root directory of */
  /* the project.                                                               */
  /*----------------------------------------------------------------------------*/
  
  #include "wpi/StackTrace.h"
  
  #include <execinfo.h>
  
  #include "wpi/Demangle.h"
  #include "wpi/SmallString.h"
  #include "wpi/raw_ostream.h"
  
  namespace wpi {
  
  std::string GetStackTrace(int offset) {
    void* stackTrace[128];
    int stackSize = backtrace(stackTrace, 128);
    char** mangledSymbols = backtrace_symbols(stackTrace, stackSize);
    wpi::SmallString<1024> buf;
    wpi::raw_svector_ostream trace(buf);
  
    for (int i = offset; i < stackSize; i++) {
      // Only print recursive functions once in a row.
      if (i == 0 || stackTrace[i] != stackTrace[i - 1]) {
        trace << "\tat " << Demangle(mangledSymbols[i]) << "\n";
      }
    }
  
    std::free(mangledSymbols);
  
    return trace.str();
  }
  
  }  // namespace wpi
  