From 4d10172d8b2c72fa809e322a3b4ff326b19ff340 Mon Sep 17 00:00:00 2001 From: Nat Goodspeed Date: Thu, 18 Aug 2016 17:33:44 -0400 Subject: MAINT-5011: Catch unhandled exceptions in LLCoros coroutines. Wrap coroutine call in try/catch in top-level coroutine wrapper function LLCoros::toplevel(). Distinguish exception classes derived from LLContinueError (log and continue) from all others (crash with LL_ERRS). Enhance CRASH_ON_UNHANDLED_EXCEPTIONS() and LOG_UNHANDLED_EXCEPTIONS() macros to accept a context string to supplement the log message. This lets us replace many places that called boost::current_exception_diagnostic_information() with LOG_UNHANDLED_EXCEPTIONS() instead, since the explicit calls were mostly to log supplemental information. Provide supplemental information (coroutine name, function parameters) for some of the previous LOG_UNHANDLED_EXCEPTIONS() calls. This information duplicates LL_DEBUGS() information at the top of these functions, but in a typical log file we wouldn't see the LL_DEBUGS() message. Eliminate a few catch (std::exception e) clauses: the information we get from boost::current_exception_diagnostic_information() in a catch (...) clause makes it unnecessary to distinguish. In a few cases, add a final 'throw;' to a catch (...) clause: having logged the local context info, propagate the exception to be caught by higher-level try/catch. In a couple places, couldn't resist reconciling indentation within a particular function: tabs where the rest of the function uses tabs, spaces where the rest of the function uses spaces. In LLLogin::Impl::loginCoro(), eliminate some confusing comments about an array of rewritten URIs that date back to a long-deleted implementation. --- indra/llcommon/llcoros.cpp | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-) (limited to 'indra/llcommon/llcoros.cpp') diff --git a/indra/llcommon/llcoros.cpp b/indra/llcommon/llcoros.cpp index d16bf0160b..4ee8e6d796 100644 --- a/indra/llcommon/llcoros.cpp +++ b/indra/llcommon/llcoros.cpp @@ -38,6 +38,7 @@ #include "llevents.h" #include "llerror.h" #include "stringize.h" +#include "llexception.h" // do nothing, when we need nothing done void LLCoros::no_cleanup(CoroData*) {} @@ -235,7 +236,18 @@ void LLCoros::toplevel(coro::self& self, CoroData* data, const callable_t& calla // capture the 'self' param in CoroData data->mSelf = &self; // run the code the caller actually wants in the coroutine - callable(); + try + { + callable(); + } + catch (const LLContinueError& e) + { + LOG_UNHANDLED_EXCEPTION(STRINGIZE("coroutine " << data->mName)); + } + catch (...) + { + CRASH_ON_UNHANDLED_EXCEPTION(STRINGIZE("coroutine " << data->mName)); + } // This cleanup isn't perfectly symmetrical with the way we initially set // data->mPrev, but this is our last chance to reset mCurrentCoro. sCurrentCoro.reset(data->mPrev); -- cgit v1.2.3