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gdb/2370: print/display of float value with infinity is shown as zero (x86-64?)
- From: greg dot reynolds at arithmatica dot com
- To: gdb-gnats at sources dot redhat dot com
- Date: 28 Nov 2007 15:53:58 -0000
- Subject: gdb/2370: print/display of float value with infinity is shown as zero (x86-64?)
- Reply-to: greg dot reynolds at arithmatica dot com
>Number: 2370
>Category: gdb
>Synopsis: print/display of float value with infinity is shown as zero (x86-64?)
>Confidential: no
>Severity: non-critical
>Priority: medium
>Responsible: unassigned
>State: open
>Class: change-request
>Submitter-Id: net
>Arrival-Date: Wed Nov 28 15:58:01 UTC 2007
>Closed-Date:
>Last-Modified:
>Originator: greg.reynolds@arithmatica.com
>Release: GNU gdb Red Hat Linux (6.5-15.fc6rh)
>Organization:
>Environment:
Linux turing 2.6.22.2-42.fc6 #1 SMP Wed Aug 15 11:52:47 EDT 2007 x86_64 x86_64 x86_64 GNU/Linux
gcc version 4.1.2 20070626 (Red Hat 4.1.2-13)
This GDB was configured as "x86_64-redhat-linux-gnu"
>Description:
Floating point variables with value "Inf" are incorrectly reported as having value "0" when examined in the debugger.
>How-To-Repeat:
In C++ program,
float x = std::numeric_limits<float>::infinity();
Then in gdb:
(gdb) p x
$1 = 0
but if you do
(gdb) p /x *(int*)&x
$2 = 0x7f800000
Does not appear to happen on 32-bit version.
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted: