зеркало из https://github.com/mozilla/gecko-dev.git
c801affedb
Currently nsHostResolver.cpp uses PL_DHashTableLookup() and fails to use
PL_DHASH_ENTRY_IS_{FREE,BUSY} on the result the way it should. However, I think
it gets away with this because it always does this on the result:
if (!he || !he->rec) { /* do stuff with |he->rec| */ }
The |!he| test is useless and always fails, but the |!he->rec| does the right
thing because (a) entry storage is always zeroed when the table is created, (b)
HostDB_ClearEntry() zeroes the |rec| field (via NS_RELEASE). So unused entries
always have a null |rec| field.
Furthermore, |he->rec| is never zero in a used entry because HostDB_InitEntry
always assigns it with a nsHostRecord assigned with infallible new in
nsHostRecord::Create (and there are existing assertions to this effect).
All this means that when this patch switches PL_DHashTableLookup to
PL_DHashTableSearch it can drop the |!he->rec| test and just do this:
if (!he) { /* do stuff with |he->rec| */ }
Finally, there's a comment about HostDB_InitEntry failing which is bogus
because HostDB_InitEntry cannot fail. This patch fixes that too.
--HG--
extra : rebase_source : ded6f8ff404cb160d89bbe7deeb3b863249bdb94
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|---|---|---|
| .. | ||
| ChildDNSService.cpp | ||
| ChildDNSService.h | ||
| DNS.cpp | ||
| DNS.h | ||
| DNSListenerProxy.cpp | ||
| DNSListenerProxy.h | ||
| DNSRequestChild.cpp | ||
| DNSRequestChild.h | ||
| DNSRequestParent.cpp | ||
| DNSRequestParent.h | ||
| GetAddrInfo.cpp | ||
| GetAddrInfo.h | ||
| Makefile.in | ||
| PDNSParams.h | ||
| PDNSRequest.ipdl | ||
| PDNSRequestParams.ipdlh | ||
| effective_tld_names.dat | ||
| moz.build | ||
| nameprep.c | ||
| nameprep_template.c | ||
| nameprepdata.c | ||
| nsDNSService2.cpp | ||
| nsDNSService2.h | ||
| nsEffectiveTLDService.cpp | ||
| nsEffectiveTLDService.h | ||
| nsHostResolver.cpp | ||
| nsHostResolver.h | ||
| nsIDNKitInterface.h | ||
| nsIDNSListener.idl | ||
| nsIDNSRecord.idl | ||
| nsIDNSService.idl | ||
| nsIDNService.cpp | ||
| nsIDNService.h | ||
| nsIEffectiveTLDService.idl | ||
| nsIIDNService.idl | ||
| nsPIDNSService.idl | ||
| prepare_tlds.py | ||
| punycode.c | ||
| punycode.h | ||
| race.c | ||