Merge branch 'master' of git+ssh://scm.gforge.inria.fr//gitroot/simgrid/simgrid

[simgrid.git] / src / xbt / backtrace.cpp

diff --git a/src/xbt/backtrace.cpp b/src/xbt/backtrace.cpp
index f897e12..fa82b4d 100644 (file)
--- a/src/xbt/backtrace.cpp
+++ b/src/xbt/backtrace.cpp
@@ -1,9 +1,23 @@
 /* Copyright (c) 2005-2016. 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 <cstddef>
+#include <cstdlib>
 
-#include <xbt/log.h>
+#include <vector>
+
+// Try to detect and use the C++ intanium 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"
 
@@ -13,8 +27,24 @@ XBT_LOG_NEW_DEFAULT_SUBCATEGORY(xbt_backtrace, xbt, "Backtrace");
 
 }
 
-/** @brief show the backtrace of the current point (lovely while debuging) */
-void xbt_backtrace_display_current(void)
+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)
+    fprintf(stderr, "---> %s\n", s.c_str());
+#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];
@@ -22,6 +52,36 @@ void xbt_backtrace_display_current(void)
   xbt_backtrace_display(bt, used);
 }
 
+namespace simgrid {
+namespace xbt {
+
+std::unique_ptr<char, void(*)(void*)> 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
+  );
+  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);
+}
+
+std::vector<xbt_backtrace_location_t> backtrace()
+{
+  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);
+}
+
+}
+}
+
 #if HAVE_BACKTRACE && HAVE_EXECINFO_H && HAVE_POPEN && defined(ADDR2LINE)
 # include "src/xbt/backtrace_linux.cpp"
 #else