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path: root/source3/registry/reg_perfcount.c
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2007-10-10r15104: Implement Samba4's tdb_name().Volker Lendecke1-1/+1
Volker (This used to be commit d52002c1c9d28e637ca4d1553e800b0b97790f36)
2007-10-10r13978: Here is why it's essential to use SAFE_FREE instead of free.Jeremy Allison1-6/+6
If we use free(data.dptr) and then the subsequent tdb_open fails in _reg_perfcount_get_counter_data() then data.dptr is left as a non-zero pointer that has been freed. This would cause it to be reused later on. Coverity bug #162. Jeremy. (This used to be commit 053efc20981e0280c6af0ebb9e17cea07da85fe8)
2007-10-10r13915: Fixed a very interesting class of realloc() bugs found by Coverity.Jeremy Allison1-29/+13
realloc can return NULL in one of two cases - (1) the realloc failed, (2) realloc succeeded but the new size requested was zero, in which case this is identical to a free() call. The error paths dealing with these two cases should be different, but mostly weren't. Secondly the standard idiom for dealing with realloc when you know the new size is non-zero is the following : tmp = realloc(p, size); if (!tmp) { SAFE_FREE(p); return error; } else { p = tmp; } However, there were *many* *many* places in Samba where we were using the old (broken) idiom of : p = realloc(p, size) if (!p) { return error; } which will leak the memory pointed to by p on realloc fail. This commit (hopefully) fixes all these cases by moving to a standard idiom of : p = SMB_REALLOC(p, size) if (!p) { return error; } Where if the realloc returns null due to the realloc failing or size == 0 we *guarentee* that the storage pointed to by p has been freed. This allows me to remove a lot of code that was dealing with the standard (more verbose) method that required a tmp pointer. This is almost always what you want. When a realloc fails you never usually want the old memory, you want to free it and get into your error processing asap. For the 11 remaining cases where we really do need to keep the old pointer I have invented the new macro SMB_REALLOC_KEEP_OLD_ON_ERROR, which can be used as follows : tmp = SMB_REALLOC_KEEP_OLD_ON_ERROR(p, size); if (!tmp) { SAFE_FREE(p); return error; } else { p = tmp; } SMB_REALLOC_KEEP_OLD_ON_ERROR guarentees never to free the pointer p, even on size == 0 or realloc fail. All this is done by a hidden extra argument to Realloc(), BOOL free_old_on_error which is set appropriately by the SMB_REALLOC and SMB_REALLOC_KEEP_OLD_ON_ERROR macros (and their array counterparts). It remains to be seen what this will do to our Coverity bug count :-). Jeremy. (This used to be commit 1d710d06a214f3f1740e80e0bffd6aab44aac2b0)
2007-10-10r11579: syncing up perf counter code cfrom trunkGerald Carter1-41/+173
(This used to be commit 59c00924b67aa3d37a933731a56d03963ec7f1b5)
2007-10-10r11137: Compile with only 2 warnings (I'm still working on that code) on a gcc4Jeremy Allison1-2/+2
x86_64 box. Jeremy. (This used to be commit d720867a788c735e56d53d63265255830ec21208)
2007-10-10r10656: BIG merge from trunk. Features not copied overGerald Carter1-0/+1225
* \PIPE\unixinfo * winbindd's {group,alias}membership new functions * winbindd's lookupsids() functionality * swat (trunk changes to be reverted as per discussion with Deryck) (This used to be commit 939c3cb5d78e3a2236209b296aa8aba8bdce32d3)