X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/a5c5765ba9e8336b55101d248a8f43fbf9cd0c0c..78edc5d868c7cb88107abcdc887180ff15c5228f:/src/xbt/exception.cpp diff --git a/src/xbt/exception.cpp b/src/xbt/exception.cpp index 6e9cf0c258..d2712eef07 100644 --- a/src/xbt/exception.cpp +++ b/src/xbt/exception.cpp @@ -1,62 +1,118 @@ -/* 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 + +#include #include +#include #include +#include #include +#include +#include "simgrid/Exception.hpp" #include -#include +#include #include #include -extern "C" { XBT_LOG_EXTERNAL_CATEGORY(xbt); XBT_LOG_NEW_DEFAULT_SUBCATEGORY(xbt_exception, xbt, "Exceptions"); + +// DO NOT define ~xbt_ex() in exception.hpp. +// Defining it here ensures that xbt_ex is defined only in libsimgrid, but not in libsimgrid-java. +// Doing otherwise naturally breaks things (at least on freebsd with clang). + +xbt_ex::~xbt_ex() = default; + +void _xbt_throw(char* message, xbt_errcat_t errcat, int value, const char* file, int line, const char* func) +{ + xbt_ex e(simgrid::xbt::ThrowPoint(XBT_THROW_POINT), message); + xbt_free(message); + e.category = errcat; + e.value = value; + throw e; +} + +/** @brief shows an exception content and the associated stack if available */ +void xbt_ex_display(xbt_ex_t* e) +{ + simgrid::xbt::log_exception(xbt_log_priority_critical, "UNCAUGHT EXCEPTION", *e); +} + +/** @brief returns a short name for the given exception category */ +const char* xbt_ex_catname(xbt_errcat_t cat) +{ + switch (cat) { + case unknown_error: + return "unknown error"; + case arg_error: + return "invalid argument"; + case bound_error: + return "out of bounds"; + case mismatch_error: + return "mismatch"; + case not_found_error: + return "not found"; + case system_error: + return "system error"; + case network_error: + return "network error"; + case timeout_error: + return "timeout"; + case cancel_error: + return "action canceled"; + case thread_error: + return "thread error"; + case host_error: + return "host failed"; + case tracing_error: + return "tracing error"; + case io_error: + return "io error"; + case vm_error: + return "vm error"; + default: + return "INVALID ERROR"; + } + return "INVALID ERROR"; } namespace simgrid { namespace xbt { -WithContextException::~WithContextException() {} - -void logException( - e_xbt_log_priority_t prio, - const char* context, std::exception const& exception) +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()); - auto with_context = - dynamic_cast(&exception); + auto* with_context = dynamic_cast(&exception); if (with_context != nullptr) - XBT_LOG(prio, "%s %s by %s/%d: %s", - context, name.get(), - with_context->processName().c_str(), with_context->pid(), - exception.what()); + XBT_LOG(prio, "%s %s by %s/%d: %s", context, name.get(), 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) { - auto backtrace = simgrid::xbt::resolveBacktrace( - with_context->backtrace().data(), with_context->backtrace().size()); + if (with_context != nullptr && not simgrid::config::get_value("exception/cutpath")) { + auto backtrace = simgrid::xbt::resolve_backtrace(with_context->throw_point().backtrace_.data(), + with_context->throw_point().backtrace_.size()); for (std::string const& s : backtrace) XBT_LOG(prio, " -> %s", s.c_str()); } // Do we have a nested exception? - auto with_nested = dynamic_cast(&exception); + auto* with_nested = dynamic_cast(&exception); if (with_nested == nullptr || with_nested->nested_ptr() == nullptr) return; try { with_nested->rethrow_nested(); } catch (std::exception& nested_exception) { - logException(prio, "Caused by", nested_exception); + log_exception(prio, "Caused by", nested_exception); } // We could catch nested_exception or WithContextException but we don't bother: catch (...) { @@ -68,5 +124,74 @@ void logException( } } +static void showBacktrace(std::vector& bt) +{ + if (simgrid::config::get_value("exception/cutpath")) { + XBT_LOG(xbt_log_priority_critical, "Display of current backtrace disabled by --cfg=exception/cutpath."); + return; + } + std::vector res = resolve_backtrace(&bt[0], bt.size()); + XBT_LOG(xbt_log_priority_critical, "Current backtrace:"); + for (std::string const& s : res) + XBT_LOG(xbt_log_priority_critical, " -> %s", s.c_str()); +} + +static std::terminate_handler previous_terminate_handler = nullptr; + +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; + if (lock.test_and_set()) { + XBT_ERROR("Handling an exception raised an exception. Bailing out."); + std::abort(); + } + + // Get the current backtrace and exception + auto e = std::current_exception(); + auto bt = backtrace(); + try { + std::rethrow_exception(e); + } + + // We manage C++ exception ourselves + catch (std::exception& e) { + log_exception(xbt_log_priority_critical, "Uncaught exception", e); + showBacktrace(bt); + std::abort(); + } + + // We don't know how to manage other exceptions + catch (...) { + // If there was another handler let's delegate to it + if (previous_terminate_handler) + previous_terminate_handler(); + else { + XBT_ERROR("Unknown uncaught exception"); + showBacktrace(bt); + std::abort(); + } + } + +} + +void install_exception_handler() +{ + static std::once_flag handler_flag; + std::call_once(handler_flag, [] { + previous_terminate_handler = std::set_terminate(handler); + }); } +// deprecated +void logException(e_xbt_log_priority_t priority, const char* context, std::exception const& exception) +{ + log_exception(priority, context, exception); +} +void installExceptionHandler() +{ + install_exception_handler(); +} + +} // namespace xbt }