Bug 15524

Summary:	[DR#437] clock() behaves incorrectly on overflow
Product:	glibc	Reporter:	Rich Felker <bugdal>
Component:	time	Assignee:	Not yet assigned to anyone <unassigned>
Status:	SUSPENDED ---
Severity:	normal	CC:	drepper.fsp
Priority:	P2	Flags:	fweimer: security-
Version:	unspecified
Target Milestone:	---
Host:		Target:
Build:		Last reconfirmed:

Description Rich Felker 2013-05-23 20:24:04 UTC

According to the Austin Group interpretation for issue 686 (http://austingroupbugs.net/view.php?id=686), the current behavior of clock() on 32-bit systems, wrapping when it overflows the range of clock_t, is non-conforming to the requirements of ISO C, which require returning (clock_t)-1 if the result is not representable.

Comment 1 Joseph Myers 2015-08-24 11:38:17 UTC

C11 DR#437 is still open, but the currently proposed TC says the return value should be unspecified on overflow, so allowing existing widespread implementation practice.

http://www.open-std.org/jtc1/sc22/wg14/www/docs/n1931.htm#dr_437