[apparmor] [PATCH 07/11] Do early cleanup of perm_map

[John Johansen]

Cleanup the perm_map as soon as it is no longer needed.  Cleaning up the map
before the end of the functions reduces the peak memory of the function
---
 parser/libapparmor_re/regexp.y |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/parser/libapparmor_re/regexp.y b/parser/libapparmor_re/regexp.y
index 4c5d801..49d9f37 100644
--- a/parser/libapparmor_re/regexp.y
+++ b/parser/libapparmor_re/regexp.y
@@ -1746,6 +1746,11 @@ void DFA::minimize(dfaflags_t flags)
 			cerr << "\033[2KMinimize dfa: partitions " << partitions.size() << "\tinit " << partitions.size() << "\t(accept " << accept_count << ")\r";
 	}
 
+	/* perm_map is no longer needed so free the memory it is using.
+	 * Don't remove - doing it manually here helps reduce peak memory usage.
+	 */
+	perm_map.clear();
+
 	int init_count = partitions.size();
 	if (flags & DFA_DUMP_PROGRESS)
 		cerr << "\033[2KMinimize dfa: partitions " << partitions.size() << "\tinit " << init_count << "\t(accept " << accept_count << ")\r";
-- 
1.7.1