Bug 162371

Summary: is used uninitialized in this function
Product: [Fedora] Fedora Reporter: David Binderman <dcb314>
Component: libunwindAssignee: Jan Kratochvil <jan.kratochvil>
Status: CLOSED RAWHIDE QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: rawhideCC: cagney
Target Milestone: ---   
Target Release: ---   
Hardware: ia64   
OS: Linux   
Whiteboard:
Fixed In Version: libunwind-0.99-0.2.frysk20070405cvs.fc7 Doc Type: Bug Fix
Doc Text:
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Last Closed: 2007-05-10 15:21:24 UTC Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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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.


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