[Bug 18921] New: O(n) hash_table_add causes winedbg to take 20 minutes to dump stack when chromium crashes
wine-bugs at winehq.org
wine-bugs at winehq.org
Fri Jun 12 21:48:25 CDT 2009
http://bugs.winehq.org/show_bug.cgi?id=18921
Summary: O(n) hash_table_add causes winedbg to take 20 minutes
to dump stack when chromium crashes
Product: Wine
Version: 1.1.23
Platform: PC
OS/Version: Linux
Status: NEW
Severity: normal
Priority: P2
Component: dbghelp
AssignedTo: wine-bugs at winehq.org
ReportedBy: dank at kegel.com
CC: eric.pouech at orange.fr
In bug 15206, I mentioned that windbg was too slow to be usable.
I ran oprofile while winedbg was churning, and the time appears
to all be spent on one line of code in dlls/dbghelp/storage.c:
void hash_table_add(struct hash_table* ht, struct hash_table_elt* elt)
{
...
569217 89.8978 : for (p = &ht->buckets[hash]; *p; p = &((*p)->next));
Looks like we need to modify struct hash_table and some of its
operators to allow a more efficient append operation there.
Fixing this bug will be one more step towards being friendly to
developers who use Visual Studio and expect our tools to be able
to handle .pdb files well.
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