Red Hat Bugzilla – Bug 649790
Invalid cast encountered when trying to get heap info out of firefox
Last modified: 2012-08-16 14:02:43 EDT
Description of problem:
When trying gdb-heap on firefox, got an invalid cast exception.
Version-Release number of selected component (if applicable):
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:
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:
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
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
RuntimeError: Invalid cast.
Error occurred in Python command: Invalid cast.
Information about the various heap allocations that firefox is using.
What version of glibc and glibc-debuginfo was this with?
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