add the Storage::read_async and Storage::write_async methods

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

diff --git a/src/xbt/backtrace.cpp b/src/xbt/backtrace.cpp
index f897e12..0fc1168 100644 (file)
--- a/src/xbt/backtrace.cpp
+++ b/src/xbt/backtrace.cpp
@@ -1,20 +1,59 @@
-/* Copyright (c) 2005-2016. The SimGrid Team. All rights reserved.          */
+/* Copyright (c) 2005-2018. 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 <cstring>
 
-#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"
 
-extern "C" {
-
 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::resolve_backtrace(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 debuging) */
-void xbt_backtrace_display_current(void)
+/** @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 +61,36 @@ 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