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Bug 162371 - is used uninitialized in this function
Summary: is used uninitialized in this function
Alias: None
Product: Fedora
Classification: Fedora
Component: libunwind
Version: rawhide
Hardware: ia64
OS: Linux
Target Milestone: ---
Assignee: Jan Kratochvil
QA Contact:
Depends On:
TreeView+ depends on / blocked
Reported: 2005-07-03 12:04 UTC by David Binderman
Modified: 2007-11-30 22:11 UTC (History)
1 user (show)

Fixed In Version: libunwind-0.99-0.2.frysk20070405cvs.fc7
Doc Type: Bug Fix
Doc Text:
Clone Of:
Last Closed: 2007-05-10 15:21:24 UTC

Attachments (Terms of Use)

Description David Binderman 2005-07-03 12:04:14 UTC
Description of problem:

I just tried to compile package libunwind-0.98.2-3 from Redhat
Fedora Core development tree with the gcc 4.0.0 compiler and
the compiler flag -Wall.

The compiler said

test-ptrace-misc.c:77: warning: 'arr[0]' is used uninitialized in this function

The source code is

  int arr[1];
  uintptr_t r;

  /* This is a vain attempt to use up lots of registers to force
     the frame-chain info to be saved on the memory stack on ia64.
     It happens to work with gcc v3.3.4 and gcc v3.4.1 but perhaps
     not with any other compiler.  */
  r = (uintptr_t) malloc(f (arr[0])

I agree with the compiler. Suggest initialise local variable arr[ 0]
before first use.

Version-Release number of selected component (if applicable):

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Additional info:

Comment 1 Jesse Keating 2006-10-26 18:31:18 UTC
No idea why this was assigned to me, reassigning to the component owner.

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