X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/166ad11130482e81d2c3e860ab6c61e972a4cdf6..9900c8f9847ec57bd5e69aa82ada3c90fa542a56:/src/xbt/backtrace.cpp

diff --git a/src/xbt/backtrace.cpp b/src/xbt/backtrace.cpp
index 022ae52a55..a7c85854b4 100644
--- a/src/xbt/backtrace.cpp
+++ b/src/xbt/backtrace.cpp
@@ -1,102 +1,155 @@
-/* Copyright (c) 2005-2017. The SimGrid Team. All rights reserved.          */
+/* Copyright (c) 2005-2019. The SimGrid Team. All rights reserved.          */
 
 /* This program is free software; you can redistribute it and/or modify it
  * under the terms of the license (GNU LGPL) which comes with this package. */
 
+#include "src/internal_config.h"
+
+#include "simgrid/simix.h" /* SIMIX_process_self_get_name() */
+#include <xbt/backtrace.hpp>
+#include <xbt/log.h>
+#include <xbt/string.hpp>
+#include <xbt/sysdep.h>
+
 #include <cstddef>
 #include <cstdlib>
 #include <cstring>
-
+#include <fstream>
+#include <sstream>
+#include <sys/stat.h>
 #include <vector>
 
-// Try to detect and use the C++ intanium ABI for name demangling:
+#include <boost/algorithm/string.hpp>
+
+// Try to detect and use the C++ itanium ABI for name demangling:
 #ifdef __GXX_ABI_VERSION
 #include <cxxabi.h>
 #endif
 
-#include "simgrid/simix.h" /* SIMIX_process_self_get_name() */
-#include <xbt/backtrace.h>
-#include <xbt/backtrace.hpp>
-#include <xbt/log.h>
-#include <xbt/sysdep.h>
-
-#include "src/internal_config.h"
-
-extern "C" {
+#if HAVE_BOOST_STACKTRACE_BACKTRACE
+#define BOOST_STACKTRACE_USE_BACKTRACE
+#include <boost/stacktrace.hpp>
+#elif HAVE_BOOST_STACKTRACE_ADDR2LINE
+#define BOOST_STACKTRACE_USE_ADDR2LINE
+#include <boost/stacktrace.hpp>
+#endif
 
 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(xbt_backtrace, xbt, "Backtrace");
 
-}
-
-static bool startWith(std::string str, const char* prefix)
-{
-  return strncmp(str.c_str(), prefix, strlen(prefix)) == 0;
-}
-
-void xbt_backtrace_display(xbt_backtrace_location_t* loc, std::size_t count)
-{
-#ifdef HAVE_BACKTRACE
-  std::vector<std::string> backtrace = simgrid::xbt::resolveBacktrace(loc, count);
-  if (backtrace.empty()) {
-    fprintf(stderr, "(backtrace not set)\n");
-    return;
-  }
-  fprintf(stderr, "Backtrace (displayed in process %s):\n", SIMIX_process_self_get_name());
-  for (std::string const& s : backtrace) {
-    if (startWith(s, "xbt_backtrace_display_current"))
-      continue;
-
-    std::fprintf(stderr, "---> '%s'\n", s.c_str());
-    if (startWith(s, "SIMIX_simcall_handle") ||
-        startWith(s, "simgrid::xbt::MainFunction") /* main used with thread factory */)
-      break;
-  }
-#else
-  XBT_ERROR("Cannot display backtrace when compiled without libunwind.");
-#endif
-}
-
 /** @brief show the backtrace of the current point (lovely while debugging) */
 void xbt_backtrace_display_current()
 {
-  const std::size_t size = 10;
-  xbt_backtrace_location_t bt[size];
-  size_t used = xbt_backtrace_current(bt, size);
-  xbt_backtrace_display(bt, used);
+  simgrid::xbt::Backtrace().display();
 }
 
 namespace simgrid {
 namespace xbt {
 
-std::unique_ptr<char, void(*)(void*)> demangle(const char* name)
+std::unique_ptr<char, std::function<void(char*)>> demangle(const char* name)
 {
 #ifdef __GXX_ABI_VERSION
   int status;
-  auto res = std::unique_ptr<char, void(*)(void*)>(
-    abi::__cxa_demangle(name, nullptr, nullptr, &status),
-    std::free
-  );
+  std::unique_ptr<char, std::function<void(char*)>> res(abi::__cxa_demangle(name, nullptr, nullptr, &status),
+                                                        &std::free);
   if (res != nullptr)
     return res;
   // We did not manage to resolve this. Probably because this is not a mangled symbol:
 #endif
   // Return the symbol:
-  return std::unique_ptr<char, void(*)(void*)>(xbt_strdup(name), std::free);
+  return std::unique_ptr<char, std::function<void(char*)>>(xbt_strdup(name), &xbt_free_f);
+}
+
+class BacktraceImpl {
+  short refcount_ = 1;
+
+public:
+  void ref() { refcount_++; }
+  bool unref()
+  {
+    refcount_--;
+    if (refcount_ == 0) {
+      delete this;
+      return true;
+    } else {
+      return false;
+    }
+  }
+#if HAVE_BOOST_STACKTRACE_BACKTRACE || HAVE_BOOST_STACKTRACE_ADDR2LINE
+  boost::stacktrace::stacktrace st;
+#endif
+};
+
+Backtrace::Backtrace()
+{
+#if HAVE_BOOST_STACKTRACE_BACKTRACE || HAVE_BOOST_STACKTRACE_ADDR2LINE
+  impl_     = new BacktraceImpl();
+  impl_->st = boost::stacktrace::stacktrace();
+#endif
+}
+Backtrace::Backtrace(const Backtrace& bt)
+{
+  impl_ = bt.impl_;
+  if (impl_)
+    impl_->ref();
 }
 
-std::vector<xbt_backtrace_location_t> backtrace()
+Backtrace::Backtrace(Backtrace&& bt)
 {
-  const std::size_t size = 10;
-  xbt_backtrace_location_t loc[size];
-  size_t used = xbt_backtrace_current(loc, size);
-  return std::vector<xbt_backtrace_location_t>(loc, loc + used);
+  impl_    = bt.impl_;
+  bt.impl_ = nullptr;
+}
+
+Backtrace& Backtrace::operator=(const Backtrace& rhs)
+{
+  if (this != &rhs) {
+    if (impl_)
+      impl_->unref();
+    impl_ = rhs.impl_;
+    if (impl_)
+      impl_->ref();
+  }
+  return *this;
 }
 
+Backtrace& Backtrace::operator=(Backtrace&& rhs)
+{
+  if (this != &rhs) {
+    if (impl_)
+      impl_->unref();
+    impl_     = rhs.impl_;
+    rhs.impl_ = nullptr;
+  }
+  return *this;
 }
+
+Backtrace::~Backtrace()
+{
+  if (impl_)
+    impl_->unref();
 }
 
-#if HAVE_BACKTRACE && HAVE_EXECINFO_H && HAVE_POPEN && defined(ADDR2LINE)
-# include "src/xbt/backtrace_linux.cpp"
-#else
-# include "src/xbt/backtrace_dummy.cpp"
+std::string const Backtrace::resolve() const
+{
+  std::string result("");
+
+#if HAVE_BOOST_STACKTRACE_BACKTRACE || HAVE_BOOST_STACKTRACE_ADDR2LINE
+  std::stringstream ss;
+  ss << impl_->st;
+  result.append(ss.str());
 #endif
+  return result;
+}
+
+void Backtrace::display() const
+{
+  std::string backtrace = resolve();
+  if (backtrace.empty()) {
+    fprintf(stderr, "(backtrace not set -- did you install Boost.Stacktrace?)\n");
+    return;
+  }
+  fprintf(stderr, "Backtrace (displayed in actor %s):\n", SIMIX_process_self_get_name());
+  std::fprintf(stderr, "%s\n", backtrace.c_str());
+}
+
+} // namespace xbt
+} // namespace simgrid