http://sourceware.org/bugzilla/show_bug.cgi?id=12342
Summary: objcoery --redefine-syms is very slow
Product: binutils
Version: 2.21
Status: NEW
Severity: enhancement
Priority: P2
Component: binutils
AssignedTo: [email protected]
ReportedBy: [email protected]
Hi,
I am running objcopy --redefine-syms on an executable which has more than 300K
symbols. I am trying to encrypt all local/global symbols in the executable.
"objcopy --redefine-syms" is very very slow for that operation. It took me
almost 3 hours on an Opteron 4 x 2600 MHz rhel4 box.
When I debugged the objcopy code (2.21), I found it keeps the symbols to be
redefined in a linked list and in the execution flow it goes on comparing each
symbol with the linked list. This leads to n-square 'strcmp' operations.
I replaced the linked list with a simple hash to cut down the number of
strcmp. With hash the entire operation time came to 2 minutes in the same
box.
So I request to replace the linked list implementation with a simpler hash.
regards,
Saibal
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