Bug 649790 - Invalid cast encountered when trying to get heap info out of firefox
Summary: Invalid cast encountered when trying to get heap info out of firefox
Keywords:
Status: CLOSED WONTFIX
Alias: None
Product: Fedora
Classification: Fedora
Component: gdb-heap
Version: 14
Hardware: x86_64
OS: Linux
low
medium
Target Milestone: ---
Assignee: Dave Malcolm
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2010-11-04 15:11 UTC by William Cohen
Modified: 2012-08-16 18:02 UTC (History)
1 user (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed: 2012-08-16 18:02:41 UTC
Type: ---
Embargoed:


Attachments (Terms of Use)

Description William Cohen 2010-11-04 15:11:54 UTC
Description of problem:

When trying gdb-heap on firefox, got an invalid cast exception.

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

firefox-3.6.12-1.fc14.x86_64
gdb-7.2-23.fc14.x86_64
gdb-heap-0.5-2.fc14.x86_64


How reproducible:

Every time


Steps to Reproduce:
1. Start up firefox, note the pid of the/usr/,lib64/firefox-3.6/firefox
2. Start up gdb with and attach to the appropriate process:
    PYTHONPATH=/usr/share/gdb-heap gdb
    python import heap
    attach 2057 # this will need to be pid for /usr/lib64/firefox-3.6/firefox
3. Attempt to print out heap info with:
   heap
  
Actual results:

Traceback (most recent call last):
  File "/usr/share/gdb-heap/heap/commands.py", line 34, in g
    return f(self, args, from_tty)
  File "/usr/share/gdb-heap/heap/commands.py", line 56, in invoke
    usage_list = list(iter_usage_with_progress())
  File "/usr/share/gdb-heap/heap/__init__.py", line 526, in next
    return self.inner.next()
  File "/usr/share/gdb-heap/heap/__init__.py", line 550, in iter_usage
    for chunk in ms.iter_sbrk_chunks():
  File "/usr/share/gdb-heap/heap/glibc.py", line 239, in iter_sbrk_chunks
    if chunk.as_address() > 0:
  File "/usr/share/gdb-heap/heap/__init__.py", line 125, in as_address
    return long(self._gdbval.cast(type_void_ptr))
RuntimeError: Invalid cast.
Error occurred in Python command: Invalid cast.

Expected results:

Information about the various heap allocations that firefox is using.

Additional info:

Comment 1 Dave Malcolm 2010-11-04 23:34:53 UTC
What version of glibc and glibc-debuginfo was this with?

Comment 2 William Cohen 2010-11-05 13:36:24 UTC
glibc-2.12.90-18.x86_64
glibc-debuginfo-2.12.90-18.x86_64

Comment 3 Fedora End Of Life 2012-08-16 18:02:43 UTC
This message is a notice that Fedora 14 is now at end of life. Fedora 
has stopped maintaining and issuing updates for Fedora 14. It is 
Fedora's policy to close all bug reports from releases that are no 
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of '14' have been closed as WONTFIX.

(Please note: Our normal process is to give advanced warning of this 
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