Opened 6 years ago

Closed 6 years ago

#6361 closed Bugs (fixed)

integer overflow in boost::chrono::process_real_cpu_clock::now() under Windows 32bits

Reported by: ivan.lelann@… Owned by: viboes
Milestone: Boost 1.50.0 Component: chrono
Version: Boost 1.48.0 Severity: Problem
Keywords: Cc:


As of 1.48 Boost.Chrono contains code below for boost::chrono::process_real_cpu_clock::now() (boost\chrono\detail\inlined\win\process_cpu_clocks.hpp)

clock_t c = ::clock(); /* ... */ return time_point(



duration::rep is int64/nanoseconds, clock_t is long. This is under VS2008, Win XP 32bits. I think "c" should be cast to duration::rep before being multiplied.

C-style cast fixed the problem for me. Howard Hinnant suggested following cleaner fix on the mailing list :

typedef ratio_divide<giga, ratio<CLOCKS_PER_SEC>>::type R; return time_point(



NB: This appears at least twice in this file. It also appears in "mac" and "posix" folders though I cannot say if it is problematic on this platforms.

Attachments (1)

6361.patch (977 bytes) - added by viboes 6 years ago.

Download all attachments as: .zip

Change History (4)

comment:1 Changed 6 years ago by viboes

Milestone: To Be DeterminedBoost 1.50.0
Status: newassigned

Sorry, I forget this issue. I will take care of it as soon as I have access to a windows machine.

Changed 6 years ago by viboes

Attachment: 6361.patch added

comment:2 Changed 6 years ago by viboes

Committed in trunk At revision: [77545]

Last edited 6 years ago by viboes (previous) (diff)

comment:3 Changed 6 years ago by viboes

Resolution: fixed
Status: assignedclosed

(In [77694]) Chrono Fix #6361,#6628,#6666

Modify Ticket

Change Properties
Set your email in Preferences
as closed The owner will remain viboes.
The resolution will be deleted.

Add Comment

E-mail address and name can be saved in the Preferences.

Note: See TracTickets for help on using tickets.