Update copyright lines for 2022.

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

diff --git a/src/xbt/exception.cpp b/src/xbt/exception.cpp
index 8879309..6d6cc5f 100644 (file)
--- a/src/xbt/exception.cpp
+++ b/src/xbt/exception.cpp
@@ -1,4 +1,4 @@
-/* Copyright (c) 2005-2020. The SimGrid Team. All rights reserved.          */
+/* Copyright (c) 2005-2022. 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. */
@@ -8,19 +8,20 @@
 #include <xbt/config.hpp>
 #include <xbt/log.hpp>
 
+#include <boost/core/demangle.hpp>
 #include <mutex>
 #include <sstream>
+#include <typeinfo>
 
 XBT_LOG_EXTERNAL_CATEGORY(xbt);
 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(xbt_exception, xbt, "Exceptions");
 
-void _xbt_throw(char* message, int value, const char* file, int line, const char* func)
+void _xbt_throw(char* message, const char* file, int line, const char* func)
 {
   simgrid::Exception e(
       simgrid::xbt::ThrowPoint(file, line, func, simgrid::xbt::Backtrace(), xbt_procname(), xbt_getpid()),
       message ? message : "");
   xbt_free(message);
-  e.value    = value;
   throw e;
 }
 
@@ -34,38 +35,35 @@ UnimplementedError::~UnimplementedError()   = default;
 void log_exception(e_xbt_log_priority_t prio, const char* context, std::exception const& exception)
 {
   try {
-    auto name = simgrid::xbt::demangle(typeid(exception).name());
+    std::string name = boost::core::demangle(typeid(exception).name());
 
     auto* with_context = dynamic_cast<const simgrid::Exception*>(&exception);
-    if (with_context != nullptr)
-      XBT_LOG(prio, "%s %s by %s/%d: %s", context, name.get(), with_context->throw_point().procname_.c_str(),
+    if (with_context != nullptr) {
+      XBT_LOG(prio, "%s %s by %s/%d: %s", context, name.c_str(), with_context->throw_point().procname_.c_str(),
               with_context->throw_point().pid_, exception.what());
-    else
-      XBT_LOG(prio, "%s %s: %s", context, name.get(), exception.what());
-
-    // Do we have a backtrace?
-    if (with_context != nullptr && not simgrid::config::get_value<bool>("exception/cutpath")) {
-      auto backtrace = with_context->resolve_backtrace();
-      XBT_LOG(prio, "  -> %s", backtrace.c_str());
+      // Do we have a backtrace?
+      if (not simgrid::config::get_value<bool>("exception/cutpath")) {
+        auto backtrace = with_context->resolve_backtrace();
+        XBT_LOG(prio, "Backtrace:\n%s", backtrace.c_str());
+      }
+    } else {
+      XBT_LOG(prio, "%s %s: %s", context, name.c_str(), exception.what());
     }
+  } catch (...) {
+    // Don't log exceptions we got when trying to log exception
+    XBT_LOG(prio, "Ignoring exception caught while while trying to log an exception!");
+  }
 
+  try {
     // Do we have a nested exception?
     auto* with_nested = dynamic_cast<const std::nested_exception*>(&exception);
-    if (with_nested == nullptr ||  with_nested->nested_ptr() == nullptr)
-      return;
-    try {
+    if (with_nested != nullptr && with_nested->nested_ptr() != nullptr)
       with_nested->rethrow_nested();
-    } catch (const std::exception& nested_exception) {
-      log_exception(prio, "Caused by", nested_exception);
-    }
+  } catch (const std::exception& nested_exception) {
+    log_exception(prio, "Caused by", nested_exception);
+  } catch (...) {
     // We could catch nested_exception or WithContextException but we don't bother:
-    catch (...) {
-      XBT_LOG(prio, "Caused by an unknown exception");
-    }
-  }
-  catch (...) {
-    // Don't log exceptions we got when trying to log exception
-    XBT_LOG(prio, "Ignoring exception caught while while trying to log an exception!");
+    XBT_LOG(prio, "Caused by an unknown exception");
   }
 }
 
@@ -76,13 +74,12 @@ static void show_backtrace(const simgrid::xbt::Backtrace& bt)
     return;
   }
   std::string res = bt.resolve();
-  XBT_CRITICAL("Current backtrace:");
-  XBT_CRITICAL("  -> %s", res.c_str());
+  XBT_CRITICAL("Current backtrace:\n%s", res.c_str());
 }
 
 static std::terminate_handler previous_terminate_handler = nullptr;
 
-static void handler()
+XBT_ATTRIB_NORETURN static void handler()
 {
   // Avoid doing crazy things if we get an uncaught exception inside an uncaught exception
   static std::atomic_flag lock = ATOMIC_FLAG_INIT;
@@ -91,11 +88,9 @@ static void handler()
     std::abort();
   }
 
-  // Get the current backtrace and exception
-  auto e = std::current_exception();
-  simgrid::xbt::Backtrace bt = simgrid::xbt::Backtrace();
+  // Get the current exception and show backtrace
   try {
-    std::rethrow_exception(e);
+    std::rethrow_exception(std::current_exception());
   }
 
   // Parse error are handled differently, as the call stack does not matter, only the file location
@@ -108,28 +103,24 @@ static void handler()
   // We manage C++ exception ourselves
   catch (const std::exception& e) {
     log_exception(xbt_log_priority_critical, "Uncaught exception", e);
-    show_backtrace(bt);
-    std::abort();
   }
 
   catch (const simgrid::ForcefulKillException&) {
     XBT_ERROR("Received a ForcefulKillException at the top-level exception handler. Maybe a Java->C++ call that is not "
               "protected in a try/catch?");
-    show_backtrace(bt);
   }
 
   // We don't know how to manage other exceptions
   catch (...) {
     // If there was another handler let's delegate to it
-    if (previous_terminate_handler)
+    if (previous_terminate_handler) {
       previous_terminate_handler();
-    else {
-      XBT_ERROR("Unknown uncaught exception");
-      show_backtrace(bt);
-      std::abort();
+      XBT_ERROR("Unexpected return from delegated terminate handler");
     }
+    XBT_ERROR("Unknown uncaught exception");
   }
-  XBT_INFO("BAM");
+  show_backtrace(simgrid::xbt::Backtrace());
+  std::abort();
 }
 
 void install_exception_handler()