Bug 1375711

Summary:	std::rethrow_exception is not properly incrementing the uncaught exception count
Product:	Red Hat Enterprise Linux 7	Reporter:	John Walter <jwalter>
Component:	gcc	Assignee:	Jakub Jelinek <jakub>
Status:	CLOSED ERRATA	QA Contact:	Michael Petlan <mpetlan>
Severity:	urgent	Docs Contact:
Priority:	urgent
Version:	7.2	CC:	cww, jakub, joedward, jwakely, jwalter, jwright, mcermak, mnewsome, mpetlan, mpolacek, rob+redhat
Target Milestone:	rc
Target Release:	---
Hardware:	Unspecified
OS:	Linux
Whiteboard:
Fixed In Version:	gcc-4.8.5-12.el7	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:
Clones:	1380760 (view as bug list)		Environment:
Last Closed:	2017-08-01 22:35:59 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Bug Depends On:
Bug Blocks:	1298243, 1380760, 1390370

Description John Walter 2016-09-13 19:47:33 UTC

Description of problem:
Calls to `std::uncaught_exception` after calling
`std::rethrow_exception' always return `true' when
`std::uncaught_exception' should return `false' unless an exception is
in flight. `std::rethrow_exception' does not update
`__cxa_eh_globals::uncaughtExceptions' while the following call to
`__cxa_begin_catch' decrements it. This fixes PR 62258.


How reproducible:
Always


Additional info:
PATCH ==> https://gcc.gnu.org/ml/libstdc++/2015-02/msg00005.html


This is a two-line patch that is already fixed upstream.

Comment 6 Rob Riggs 2016-09-22 14:58:30 UTC

Affects RHEL 6.7 as well.  Probably introduced here in RHEL6

* Tue Apr 15 2014 Marek Polacek <polacek> 4.4.7-5
- fix std::uncaught_exception (#1085442, PR c++/59224)

as a side-effect since the problem does not manifest with libstdc++-4.4.7-3.

This is an issue when using devtoolset compilers on RHEL6, esp. when using C++11 std::future with exceptions, which uses std::rethrow_exception() to move the exceptions across threads.

Comment 19 Michael Petlan 2017-05-31 14:06:37 UTC

The related test passes on all architectures with gcc-4.8.5-14.el7.
VERIFIED.

Comment 20 errata-xmlrpc 2017-08-01 22:35:59 UTC

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2017:2094