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[PATCH] unwinder: Add debugging output to the Dwarf2 unwinder

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Add debugging printks to the unwinder to allow easier debugging
when something goes wrong with it.

This can be controlled with the new unwinder_debug=N option
Most output is given by N=1

AK: Added documentation of unwinder_debug=

Signed-off-by: Jan Beulich <[email protected]>
Signed-off-by: Andi Kleen <[email protected]>
This commit is contained in:
Jan Beulich 2006-12-07 02:14:13 +01:00 • committed by Andi Kleen
commit 6d0185ea61
2 changed files with 99 additions and 17 deletions
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3
Documentation/kernel-parameters.txt
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@ -1735,6 +1735,9 @@ and is between 256 and 4096 characters. It is defined in the file
norandmaps Don't use address space randomization
Equivalent to echo 0 > /proc/sys/kernel/randomize_va_space
unwind_debug=N N > 0 will enable dwarf2 unwinder debugging
This is useful to get more information why
you got a "dwarf2 unwinder stuck"
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