Hi all.
From this snippet:
Wt::WApplication *createApplication(const Wt::WEnvironment&
env)
{
Wt::WApplication* app = new
Application(env);
return
app;
}
int main(int argc, char
**argv)
{
_malloc_options =
"X";
return Wt::WRun(argc, argv,
&createApplication);
}
where Application is derived from Wt::WApplication.
I've faced a problem when exception is thrown from Application
constructor on undefined conditions and not easy reproducible.
Below is what Wt shows me:
[2009-May-09 14:11:57.795562] 15553 - [notice] "Wt: initializing
built-in httpd"
[2009-May-09 14:11:57.795937] 15553 - [notice] "Reading Wt config file:
/usr/local/etc/wt_config.xml (location = '../build/gui/manager/manager')"
[2009-May-09 14:11:57.797076] 15553 - [notice] "Starting server:
http://0.0.0.0:8080";
[2009-May-09 14:12:03.306825] 15553 [/ GH5fhrq5J6wWgQe6] [notice]
"Session created (#sessions = 1)"
127.0.0.1 - - [2009-May-09 14:12:03.308593] "GET /?wtd=4lsL HTTP/1.1"
200 1692
127.0.0.1 - - [2009-May-09 14:12:03.385447] "GET /?wtd=GH5fhrq5J6wWgQe6
HTTP/1.1" 200 1693
[2009-May-09 14:12:11.187771] 15553 [/ GH5fhrq5J6wWgQe6] [fatal]
"std::bad_alloc"
127.0.0.1 - - [2009-May-09 14:12:11.189939] "GET
/?wtd=GH5fhrq5J6wWgQe6&js=yes&ajax=yes&request=script&rand=2012640305
HTTP/1.1" 200 67
[2009-May-09 14:12:11.190813] 15553 [/ GH5fhrq5J6wWgQe6] [notice]
"Session destroyed (#sessions = 0)"
There is some bad memory allocation (out of system memory), but Wt just
catches exception and displays error.
For developer it's not much useful.
There should be a core dump to debug with GDB.
I propose to remove catching non-Wt exceptions.
--
Andrii Arsirii
Streamco
http://streamco.org.ua
Index: src/web/WebController.C
===================================================================
--- src/web/WebController.C (revision 2880)
+++ src/web/WebController.C (working copy)
@@ -805,17 +805,6 @@
handler.killSession();
session->renderer().serveError(*handler.request(), e, type);
- } catch (std::exception& e) {
- session->log("fatal") << e.what();
-
- handler.killSession();
- session->renderer().serveError(*handler.request(), e, type);
- } catch (...) {
- session->log("fatal") << "Unknown exception.";
-
- handler.killSession();
- session->renderer().serveError(*handler.request(),
- std::string("Unknown exception"), type);
}
if (handler.sessionDead()) {
Index: src/web/WebSession.C
===================================================================
--- src/web/WebSession.C (revision 2880)
+++ src/web/WebSession.C (working copy)
@@ -254,15 +254,8 @@
bool WebSession::start(WApplication::ApplicationCreator createApplication)
{
- try {
- app_ = createApplication(env_);
- } catch (...) {
- app_ = 0;
+ app_ = createApplication(env_);
- kill();
- throw;
- }
-
if (app_)
app_->initialize();
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