1 files changed, 78 insertions, 0 deletions
diff --git a/src/common/BackTrace.h b/src/common/BackTrace.h
new file mode 100644
index 000000000..d89b34d3e
--- /dev/null
+++ b/src/common/BackTrace.h
@@ -0,0 +1,78 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#ifndef CEPH_BACKTRACE_H
+#define CEPH_BACKTRACE_H
+
+#include "acconfig.h"
+#include <iosfwd>
+#ifdef HAVE_EXECINFO_H
+#include <execinfo.h>
+#endif
+#include <stdlib.h>
+
+#include <list>
+#include <string>
+
+namespace ceph {
+
+class Formatter;
+
+struct BackTrace {
+  virtual ~BackTrace() {}
+  virtual void print(std::ostream& out) const = 0;
+  virtual void dump(Formatter *f) const = 0;
+};
+
+inline std::ostream& operator<<(std::ostream& out, const BackTrace& bt) {
+  bt.print(out);
+  return out;
+}
+
+
+struct ClibBackTrace : public BackTrace {
+  const static int max = 32;
+
+  int skip;
+  void *array[max]{};
+  size_t size;
+  char **strings;
+
+  explicit ClibBackTrace(int s) {
+#ifdef HAVE_EXECINFO_H
+    skip = s;
+    size = backtrace(array, max);
+    strings = backtrace_symbols(array, size);
+#else
+    skip = 0;
+    size = 0;
+    strings = nullptr;
+#endif
+  }
+  ~ClibBackTrace() {
+    free(strings);
+  }
+
+  ClibBackTrace(const ClibBackTrace& other);
+  const ClibBackTrace& operator=(const ClibBackTrace& other);
+
+  void print(std::ostream& out) const override;
+  void dump(Formatter *f) const override;
+
+  static std::string demangle(const char* name);
+};
+
+
+struct PyBackTrace : public BackTrace {
+  std::list<std::string> strings;
+
+  explicit PyBackTrace(std::list<std::string>& s) : strings(s) {}
+
+  void dump(Formatter *f) const override;
+  void print(std::ostream& out) const override;
+};
+
+
+}
+
+#endif